CN114126092A

CN114126092A - Discontinuous reception DRX method and device

Info

Publication number: CN114126092A
Application number: CN202110358455.0A
Authority: CN
Inventors: 才宇; 徐海博; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-08-29
Filing date: 2021-04-01
Publication date: 2022-03-01

Abstract

The embodiment of the application provides a method and a device for Discontinuous Reception (DRX), which can enable the time domain position of a side link resource allocated by a network device for a terminal device at a sending end to be within the side chain DRX activation time of the terminal device at a receiving end, thereby avoiding the problem that a DRX mechanism in side link communication cannot work or the side link resource is wasted, and the method comprises the following steps: the method comprises the steps that a first terminal device sends a side chain DRX parameter or indication information of a second terminal device to a network device, so that the network device determines a first period based on the side chain DRX parameter or the indication information, wherein the first period belongs to the side chain DRX activation time of the second terminal device; the method comprises the steps that a first terminal device receives a side chain authority sent by a network device, wherein the side chain authority is used for indicating the first terminal device to send resources of PSCCH and/or PSSCH, and the time domain position of the resources is in a first time period; the first terminal device transmits the PSCCH and/or PSCCH based on the side-chain rights.

Description

Discontinuous reception DRX method and device

The present application claims priority of chinese patent application having application number 202010890908.X entitled "a SL DRX mechanism method" filed by the chinese patent office at 29/08/2020, which is incorporated herein by reference in its entirety; the priority of chinese patent application entitled "a DRX discontinuous reception method and apparatus" filed by the chinese patent office at 16/10/2020, application number 202011112258.2, is claimed herein and is incorporated herein by reference in its entirety.

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for DRX discontinuous reception.

Background

In a New Radio (NR) system specified by a 3rd generation partnership project (3 GPP) protocol, when Uu interface communication is performed between a terminal device and a network device, in order to save power consumption of the terminal device, a discontinuous reception (C-DRX) mechanism is introduced, where the DRX mechanism configures a DRX cycle or configures DRX for the terminal device in a Radio Resource Control (RRC) connected state. The DRX mechanism may control the terminal device to monitor a Physical Downlink Control Channel (PDCCH) during DRX active time and not monitor the PDCCH during DRX inactive time, so as to save power consumption of the terminal device. To address the power consumption issue of terminal devices in sidelink communications, a DRX mechanism may be used in sidelink communications. The DRX mechanism in the sidelink communication is similar to the DRX mechanism in the Uu interface communication, and in the sidelink communication, if the DRX mechanism is introduced, the terminal device at the receiving end receives at least one of a Physical Sidelink Control Channel (PSCCH), a physical sidelink shared channel (PSCCH), and Sidelink Control Information (SCI) transmitted by the terminal device at the transmitting end only at the DRX active time.

Disclosure of Invention

The embodiment of the application provides a DRX method and a DRX device, which are used for solving the problems that when a DRX mechanism is used in sidelink communication, if network equipment allocates sidelink resources for terminal equipment at a sending end, the time domain position of the sidelink resources may not be within the activation time of the sidelink DRX of the terminal equipment at a receiving end, so that the DRX mechanism cannot work in the sidelink communication, or the sidelink resources are wasted.

In a first aspect, the present application provides a DRX method, including: the method comprises the steps that a first terminal device sends a side chain Discontinuous Reception (DRX) parameter or indication information of a second terminal device to a network device, so that the network device determines a first period based on the side chain DRX parameter or the indication information; the indication information is used for indicating the start and/or the end of the first period, the first period belongs to a side chain DRX activation time of the second terminal equipment, and the second terminal equipment is equipment for performing side link communication with the first terminal equipment; the first terminal equipment receives the side chain authority sent by the network equipment; wherein the side chain authority is used for instructing the first terminal device to transmit a resource of a physical side chain control channel PSCCH and/or a physical side chain shared channel PSSCH, and the time domain position of the resource is within the first time period; the first terminal device transmits the PSCCH and/or PSCCH based on the side chain permission.

Based on the above technical solution, the first terminal device sends the information related to the side chain DRX activation time of the second terminal device to the network device, so that the network device can know the side chain DRX activation time of the second terminal device, and further, the time domain position of the resource indicated by the side chain authority allocated by the network device to the first terminal device can be within the side chain DRX activation time of the second terminal device, so that the second terminal device can receive PSCCH, or SCI within the side chain DRX activation time, thereby avoiding the problem that the DRX mechanism between the first terminal device and the second terminal device cannot work or the resources of the side chain are wasted because the time domain position of the resource indicated by the side chain authority is not within the side chain DRX activation time of the second terminal device.

In one possible design, the indication information is included in uplink control information UCI, a media access control element MAC CE, or a radio resource control RRC message; the side-chain authority is contained in downlink control information DCI, MAC CE or RRC message.

In one possible design, the sending, by the first terminal device, the indication information to the network device includes: the first terminal equipment sends first indication information to the network equipment at the starting moment of the first time interval; the first indication information is used for indicating the end time of the first time interval; or, the first terminal device sends second indication information to the network device at the starting time of the first time interval, and sends third indication information to the network device at the ending time of the first time interval; wherein the second indication information is used for indicating the beginning of the first time interval, and the third indication information is used for indicating the end of the first time interval.

In one possible design, the first period belongs to a side chain DRX activation time of the second terminal device, comprising: the first period comprises a side chain DRX activation time of each of the second terminal devices; or, the first period includes an intersection or a union of the side-chain DRX activation times of at least two of the second terminal devices.

In one possible design, the first period comprises an intersection or union of side-chain DRX activation times of at least two of the second terminal devices, comprising: the first period of time comprises any one or combination of more of the following: the earliest starting time to the earliest ending time in the side chain DRX activation time of each second terminal device; the side chain DRX activation time of each second terminal device is from the earliest starting time to the latest ending time; the side chain DRX activation time of each second terminal device is from the latest starting time to the earliest ending time; the side chain DRX activation time of each second terminal device is from the latest starting time to the latest ending time; the side chain DRX activation time of any one second terminal equipment begins or ends to the side chain DRX activation time of any one second terminal equipment begins or ends.

In one possible design, if the first period includes a side chain DRX activation time of each second terminal device, the receiving, by the first terminal device, a side chain permission sent by the network device includes: and the first terminal equipment receives the side chain authority and the equipment identification information sent by the network equipment, and determines the second terminal equipment corresponding to the side chain authority based on the equipment identification information.

In one possible design, the side chain DRX activation times comprise run times of a DRX duration timer and a DRX deactivation timer, the DRX deactivation timer being started or restarted when the first terminal device transmits PSCCH and/or PSCCH; or, the DRX deactivation timer is started or restarted when the first terminal device receives HARQ feedback information of the second terminal device based on the PSCCH and/or PSCCH; or, the DRX deactivation timer is started or restarted when the first terminal device sends fourth indication information to the network device and the second terminal device; wherein the fourth indication information is used for indicating that the DRX deactivation timer is started or restarted.

In one possible design, the method further includes: the DRX deactivation timer is started or restarted when the first terminal equipment receives Sidelink Control Information (SCI) and information included in the SCI meets a preset condition; the SCI comprises any one or more of a source address layer identifier source layer-1ID, a destination address layer identifier destination layer-1ID or a communication type cast type, wherein the cast type is used for indicating unicast communication, multicast communication or broadcast communication.

In one possible design, the SCI includes a source layer-1ID and a destination layer-1ID, and when the destination layer-1ID is the same as the layer-1ID of the first terminal device and the source layer-1ID is the same as the layer-1ID of the second terminal device, the first terminal device starts or restarts the DRX deactivation timer corresponding to a side chain DRX between the first terminal device and the second terminal device; or, the SCI includes source layer-1ID, destination layer-1ID, and a cast type, and when the cast type indicates unicast communication, the destination layer-1ID is the same as the layer-1ID of the first terminal device, and the source layer-1ID is the same as the layer-1ID of the second terminal device, the first terminal device starts or restarts the DRX deactivation timer corresponding to a side chain DRX between the first terminal device and the second terminal device; or, the SCI includes a destination layer-1ID and a cast type, and when the cast type is used to indicate multicast communication, and the destination layer-1ID is the same as the destination layer-1ID of the multicast communication, the first terminal device starts or restarts the DRX deactivation timer corresponding to the side-chain DRX of the multicast communication.

In one possible design, a destination layer-1ID included in the SCI is the same as a layer-1ID of the first terminal device in any sidelink unicast communication, and a source layer-1ID included in the SCI is the same as a layer-1ID of a second terminal device corresponding to the first terminal device in the sidelink unicast communication, and the method further includes: the first terminal equipment cancels or restarts the DRX deactivation timer corresponding to the side chain DRX between the first terminal equipment and the second terminal equipment; wherein the first terminal device determines that a source address layer two identifier source-2 ID of a media access control protocol data unit, MAC PDU, corresponding to the SCI is different from a layer-2ID of a second terminal device corresponding to the first terminal device in the sidelink unicast communication, or a destination address layer two identifier destination-2 ID of the MAC PDU corresponding to the SCI is different from the layer-2ID of the first terminal device in the sidelink unicast communication; or the first terminal device configures layer-2ID in the sidelink unicast communication between the first terminal device and the second terminal device; wherein the layer-1ID corresponding to the layer-2ID is different from the layer-1ID corresponding to the layer-2ID configured by the first terminal device in the sidelink unicast communication with other second terminal devices; or the first terminal device configures layer-2ID in the sidelink unicast communication between the first terminal device and the second terminal device; the layer-1ID corresponding to the layer-2ID is different from the layer-1ID corresponding to the layer-2ID in other sidelink unicast communication, and the other sidelink unicast communication is sidelink unicast communication in which the terminal device does not include the first terminal device.

In one possible design, the first terminal device receives the SCI or the fourth indication information, and a MAC PDU corresponding to the SCI or the fourth indication information includes only non-data information, and the method further includes: the first terminal equipment determines that the MAC PDU corresponding to the SCI comprises first information and does not comprise second information, and cancels or restarts the DRX deactivation timer corresponding to the side chain DRX between the first terminal equipment and the second terminal equipment; wherein the first information comprises any one or combination of more of the following: side link channel state information report, side link resource information in cooperation between terminal equipments; the second information comprises any one or combination of more of the following: data of a sidelink control channel SCCH, data of a sidelink service channel STCH, and a media access control unit MAC CE except the first information; alternatively, the first information comprises any one or a combination of more of the following: side link channel state information report, side link resource information in cooperation between terminal devices, data of SCCH, information other than data of STCH; the second information includes data of the STCH.

In one possible design, the first terminal device receives a PSCCH, psch, or MAC PDU sent by the second terminal device and an SCI corresponding to the PSCCH, psch, or MAC PDU indicates at least two resources, or receives the SCI sent by the second terminal device and the SCI indicates at least two resources, and the method further includes: the first terminal equipment starts a side chain HARQ timer or a DRX retransmission timer corresponding to side chain DRX between the first terminal equipment and the second terminal equipment; wherein the priority indicated by the SCI is greater than the minimum value of the priority value range; the first terminal equipment does not start a side chain HARQ timer or a DRX retransmission timer corresponding to side chain DRX between the first terminal equipment and the second terminal equipment; wherein, the priority indicated by the SCI is the minimum value of the priority value range.

In one possible design, the first terminal device receives a PSCCH, psch, or MAC PDU sent by the second terminal device and an SCI corresponding to the PSCCH, psch, or MAC PDU indicates at least two resources, or receives the SCI sent by the second terminal device and the SCI indicates at least two resources, and the method further includes: the first terminal equipment respectively determines starting time for starting a side chain HARQ timer or a DRX retransmission timer corresponding to a side chain DRX between the first terminal equipment and the second terminal equipment according to each resource of at least two resources indicated by the SCI; wherein the resource comprises or indicates an SCI transmission occasion.

In one possible design, after the first terminal device receives the side chain permission sent by the network device, the method further includes: if the first terminal device determines to discard the side chain permission, sending fifth indication information to the network device at the end time of the first time interval or at a time interval before the end time; wherein the fifth indication information is used for indicating that the first terminal device determines to discard the side chain authority and the end of the first time period; or, if the first terminal device determines to discard the side chain permission, sending sixth indication information to the network device; wherein the sixth indication information is used to indicate that the first terminal device determines to discard the side chain right and the end time of the first period or the time domain position of the determined discarded side chain right or the time domain position of the side chain right before the determined discarded side chain right.

Based on the above technical solution, the first terminal device sends the discarded side chain authority related information to the network device after determining the discarded side chain authority, so that the network device can know that the first terminal device and the second terminal device have no DRX deactivation timer started or restarted, and further, the DRX deactivation timer maintained by the first terminal device and the second terminal device is consistent with the state of the DRX deactivation timer maintained by the network device, thereby avoiding a problem that a DRX mechanism between the first terminal device and the second terminal device cannot work or resources of the side chain are wasted because a time domain position of a resource indicated by the side chain authority subsequently sent to the first terminal device by the network device may not be within the side chain activation DRX time of the second terminal device. In a second aspect, the present application further provides a DRX method, including: the network equipment determines a first period; the first time period belongs to the side chain DRX activation time of second terminal equipment, and the second terminal equipment is equipment for performing side link communication with first terminal equipment; the network equipment transmits side chain authority to the first terminal equipment so that the first terminal equipment transmits a physical side chain control channel (PSCCH) and/or a physical side chain shared channel (PSSCH) based on the side chain authority; wherein the side-chain permission is used for indicating the resource of the PSCCH and/or PSSCH transmitted by the first terminal equipment, and the time domain position of the resource is in the first time interval.

Based on the above technical solution, the network device can know the side chain DRX activation time of the second terminal device by obtaining the relevant information of the side chain DRX activation time of the second terminal device, and further, the network device can make the time domain position of the resource indicated by the side chain authority allocated to the first terminal device by the network device be within the side chain DRX activation time of the second terminal device, so that the second terminal device can receive PSCCH, or SCI within the side chain DRX activation time, thereby avoiding the problem that the DRX mechanism between the first terminal device and the second terminal device cannot work or the side chain resource is wasted because the time domain position of the resource indicated by the side chain authority is not within the side chain DRX activation time of the second terminal device.

In one possible design, the network device determining the first period includes: the network equipment receives a side chain DRX parameter of the second terminal equipment sent by the first terminal equipment or any second terminal equipment, and determines the first period based on the side chain DRX parameter; or, the network device determines the first period based on a self-configured side chain DRX parameter of the second terminal device; or, the network device receives indication information sent by the first terminal device, and determines the first time interval based on the indication information; wherein the indication information is used for indicating the beginning and/or the end of the first time period.

In one possible design, the indication information is included in uplink control information UCI, a medium access control element, MAC CE, or a radio resource control, RRC, message; the side-chain authority is contained in downlink control information DCI, MAC CE or RRC message.

In one possible design, the receiving, by the network device, the indication information sent by the first terminal device includes: the network equipment receives first indication information sent by the first terminal equipment at the starting moment of the first time interval; the first indication information is used for indicating the end time of the first time interval; or, the network device receives second indication information sent by the first terminal device at the starting time of the first time interval and third indication information sent by the first terminal device at the ending time of the first time interval; wherein the second indication information is used for indicating the beginning of the first time interval, and the third indication information is used for indicating the end of the first time interval.

In one possible design, the first period belongs to a sidechain DRX activation time of a second terminal device, comprising: the first period comprises a side chain DRX activation time of each of the second terminal devices; or, the first period includes an intersection or a union of the side-chain DRX activation times of at least two of the second terminal devices.

In one possible design, if the first period includes a side chain DRX activation time of each of the second terminal devices, the sending, by the network device, a side chain permission to the first terminal device includes: the network device sends the side chain authority and device identification information to the first terminal device, so that the first terminal device determines the second terminal device corresponding to the side chain authority based on the device identification information.

In one possible design, the sidechain DRX activation time comprises a DRX duration timer and a run time of a DRX deactivation timer that starts or restarts when the network device sends the sidechain permission to the first terminal device; or, the DRX deactivation timer is started or restarted when the network device receives HARQ feedback information of the first terminal device based on the side chain authority; or, the DRX deactivation timer is started or restarted when the network device receives fourth indication information sent by the first terminal device; wherein the fourth indication information is used for indicating that the DRX deactivation timer is started or restarted.

In one possible design, after the network device sends the first terminal device the side-chain permission, the method further includes: the network equipment receives fifth indication information sent by the first terminal equipment at the end time of the first time interval or at the time of a certain interval before the end time; wherein the fifth indication information is used for indicating that the first terminal device determines to discard the side chain authority and the end of the first time period; or, the network device receives sixth indication information sent by the first terminal device; wherein the sixth indication information is used to indicate that the first terminal device determines to discard the side chain right and the end time of the first period or the time domain position of the determined discarded side chain right or the time domain position of the side chain right before the determined discarded side chain right.

Based on the above technical scheme, the network device determines that the first terminal device and the second terminal device have no DRX deactivation timer by receiving the relevant information of the discarded side chain authority sent by the first terminal device after determining the discarded side chain authority, and further makes the DRX deactivation timer maintained by the first terminal device and the second terminal device consistent with the state of the DRX deactivation timer maintained by the network device, thereby avoiding the problem that the DRX mechanism between the first terminal device and the second terminal device cannot work or the sideline link resource is wasted because the time domain position of the resource indicated by the side chain authority sent to the first terminal device by the network device subsequently may not be in the side chain DRX activation time of the second terminal device.

In a third aspect, the present application further provides a DRX apparatus, where the DRX apparatus has a function of implementing the method in the first aspect or any one of the possible designs of the first aspect, and the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions, such as a first sending module, a receiving module, and a second sending module.

In one possible design, the first sending module is configured to send a side-chain Discontinuous Reception (DRX) parameter or indication information of a second terminal device to a network device, so that the network device determines a first period based on the side-chain DRX parameter or the indication information; the indication information is used for indicating the start and/or the end of the first period, the first period belongs to a side chain DRX activation time of the second terminal equipment, and the second terminal equipment is equipment for performing side link communication with the first terminal equipment;

in one possible design, the receiving module is configured to receive a side chain permission sent by the network device; wherein the sidelink authority is used for instructing the first terminal device to transmit a resource of a physical sidelink control channel PSCCH and/or a physical sidelink shared channel PSSCH, and the time domain position of the resource is within the first time period;

in one possible design, the second transmitting module is configured to transmit the PSCCH and/or PSCCH based on the side-chain permission.

In a fourth aspect, the present application further provides a DRX apparatus having a function of implementing the method in any one of the possible designs of the second aspect or the second aspect, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions, such as a determination module and a transmission module.

In one possible design, the determining module is configured to determine a first time period; the first time period belongs to the side chain DRX activation time of second terminal equipment, and the second terminal equipment is equipment for performing side link communication with first terminal equipment;

in one possible design, the sending module is configured to send a sidelink authority to the first terminal device, so that the first terminal device sends a physical sidelink control channel PSCCH and/or a physical sidelink shared channel PSCCH based on the sidelink authority; wherein the side-chain permission is used for indicating the resource of the PSCCH and/or PSSCH transmitted by the first terminal equipment, and the time domain position of the resource is in the first time interval.

In a fifth aspect, the present application further provides a DRX apparatus, which may include: at least one processor; and a memory communicatively coupled to the at least one processor, a communication interface; wherein the memory stores instructions executable by the at least one processor to perform functions of a method as described above in the first aspect or in any one of the possible designs of the first aspect or the second aspect or in any one of the possible designs of the second aspect or the second aspect by executing the instructions stored by the memory.

In a sixth aspect, the present application also provides a computer readable storage medium comprising a computer program which, when run on a computer, causes the computer to perform the method of the first aspect or any one of the possible designs of the first aspect or the second aspect or any one of the possible designs of the second aspect or the second aspect.

In a seventh aspect, the present application further provides a program product for causing a computer to perform any one of the possible design-wise methods of the first aspect or any one of the possible design-wise methods of the second aspect or the second aspect when the program product is run on the computer.

In an eighth aspect, the present application further provides a chip, which may be coupled to a memory of a DRX apparatus, and configured to invoke a computer program stored in the memory and execute the above first aspect or any one of the possible design-wise methods of the first aspect or the second aspect or any one of the possible design-wise methods of the second aspect.

Drawings

Fig. 1 is a diagram illustrating a DRX cycle according to an embodiment of the present disclosure;

fig. 2 is a state diagram of a DRX deactivation timer applicable to the embodiment of the present application;

Fig. 3 is a schematic diagram of a network architecture suitable for use in the embodiments of the present application;

fig. 4 is a flowchart illustrating a DRX method according to an embodiment of the present disclosure;

fig. 5a is a schematic diagram of sending indication information according to an embodiment of the present application;

fig. 5b is a schematic diagram of another sending indication information provided in the embodiment of the present application;

fig. 5c is a schematic diagram of another sending indication information provided in the embodiment of the present application;

fig. 5d is a schematic diagram of another sending indication information provided in the embodiment of the present application;

fig. 5e is a schematic diagram of a state maintenance method of a DRX deactivation timer according to an embodiment of the present disclosure;

fig. 5f is a schematic diagram of a side chain DRX activation time according to an embodiment of the present disclosure;

figure 5g is a diagram illustrating another side-chain DRX activation time according to an embodiment of the present disclosure;

figure 5h is a diagram illustrating another side-chain DRX activation time according to an embodiment of the present disclosure;

fig. 5i is a schematic diagram of sending fifth indication information according to an embodiment of the present application;

fig. 5j is a schematic diagram of another example of sending fifth indication information according to the present application;

fig. 5k is a schematic diagram of another state maintenance method for a DRX deactivation timer according to an embodiment of the present disclosure;

Fig. 6 is a schematic structural diagram of a DRX apparatus according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another DRX apparatus according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of another DRX apparatus according to an embodiment of the present disclosure.

Detailed Description

The technical solution in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In order to facilitate understanding of the embodiments of the present application, the following description will be made of terms used in the embodiments of the present application.

Single, Sidelink (SL) communication

In the embodiment of the present application, the sidelink may also be referred to as a side link, or a sidelink, or a PC5 interface link, or an inter-terminal device link, and the sidelink communication is a wireless communication directly between two or more terminal devices. In this type of communication, two or more terminal devices that are geographically close to each other can communicate directly without passing through any network device. Data transmission in sidelink communication differs from typical cellular network communication in which data is transmitted to or received from a network device, i.e., Uplink (UL) transmission, but is transmitted directly from a terminal device at a transmitting end to a terminal device at a receiving end via an air interface such as a PC5 interface without passing through any network device, e.g., sidelink communication is performed between a pair of source address (source) and destination address (destination), wherein the terminal device at the transmitting end may be a terminal device that transmits signals, data, signaling, or information, and correspondingly, the terminal device at the receiving end may be a terminal device that receives the signals, data, signaling, or information, and the terminal device at the transmitting end may be a terminal device that receives signals, data, signaling, or information transmitted by the terminal device (including the terminal device at the receiving end), A terminal device of data, signaling or information, which in this case is also a terminal device of the receiving end, and correspondingly, a terminal device of the receiving end may also be a terminal device that transmits signals, data, signaling or information to a terminal device (including the terminal device of the transmitting end), in this case, it is also a terminal device at the transmitting end, the source is a terminal device at the transmitting end of data in sidelink communication identified by source layer-2ID, the destination is a terminal device at the receiving end of data in sidelink communication identified by destination layer-2ID, that is, the terminal device at the transmitting end is a source of sidelink communication (or a Media Access Control (MAC) Protocol Data Unit (PDU)), and the terminal device at the receiving end is a destination of sidelink communication (or a MAC PDU). For sidelink unicast communication, a PC 5-Radio Resource Control (RRC) connection is a logical connection between a pair of sources and destinations, and since a PC5-RRC connection is in one-to-one correspondence with a PC5 unicast link, after a PC5 unicast link (unicast link) is established, a PC5-RRC connection corresponding to the PC5 unicast link is established.

In this embodiment of the present application, one MAC PDU for sidelink communication may include one or more of data of a MAC Control Element (CE), a Sidelink Control Channel (SCCH), and data of a Sidelink Traffic Channel (STCH). The MAC CE includes a sidelink channel state information (SL-CSI) report MAC CE, where the SL-CSI report refers to that a terminal device provides sidelink channel state information to an opposite terminal device, the SL-CSI report MAC CE includes a Channel Quality Indicator (CQI) and a Rank Indicator (RI), and the SL-CSI report MAC CE may be included in a MAC PDU for sidelink communication. The SCCH is a sidelink channel for transmitting control information including PC5-RRC messages and PC5-S messages. The STCH is a sidelink channel for transmitting user information or traffic information.

In the embodiment of the present application, a resource used for sidelink communication between a terminal device and a terminal device is referred to as a sidelink resource, which may also be referred to as a resource for short, or a transmission resource. The sidelink resources may include sidelink resources in the frequency domain and sidelink resources in the time domain. From a transmission type perspective, the sidelink resources may include sidelink transmission resources and sidelink reception resources. The sidelink transmitting resource is used for transmitting information, such as transmitting control information and/or data, and the sidelink receiving resource is used for receiving information, such as receiving control information and/or data.

Currently, there are two methods for selecting sidelink resources. The first method is that network equipment allocates sidelink resources for terminal equipment at a sending end. That is, the network device sends a sidelink grant (SL grant) to the terminal device at the sending end, where the SL grant is used to instruct the terminal device at the sending end to transmit a Physical Sidelink Control Channel (PSCCH) and/or a physical sidelink shared channel (PSCCH) transmission resource. The second method is that the terminal device at the transmitting end autonomously selects the sidelink resource, that is, the terminal device at the transmitting end autonomously selects the SL grant, and when the terminal device at the transmitting end reserves the sidelink resource, the terminal device at the transmitting end may also send Sidelink Control Information (SCI) to the terminal device at the receiving end, where the SCI carries information for indicating the reserved sidelink resource.

Two, discontinuous-reception (C-DRX or DRX) mechanism

In Uu port communication between a terminal device and a network device, a DRX mechanism is introduced to save power for the terminal device. The DRX mechanism is to configure one DRX period or configure DRX for the terminal equipment in the RRC connection state. Fig. 1 is a schematic diagram of a DRX cycle to which the embodiment of the present invention is applicable, and it can be seen from the diagram that, in the time domain, time is divided into consecutive DRX cycles. The DRX cycle is composed of an "On Duration (awake period or awake time or active period or Duration)" during which the terminal device monitors and receives a Physical Downlink Control Channel (PDCCH), and an "Opportunity for DRX" during which the terminal device does not receive the PDCCH to save power consumption.

When the terminal device configures one DRX cycle or one DRX, the state of the terminal device may be divided into a DRX active (active) state and a DRX inactive (non-active) state (or referred to as a sleep state), the terminal device is in the DRX active state during an active time (active time), and the terminal device is in the DRX non-active state during an inactive time (non-active time). When the terminal device is in the DRX activation time, the terminal device monitors and receives the PDCCH. If the terminal equipment is in the DRX inactive time, the terminal equipment does not monitor and receive the PDCCH, and the power consumption can be saved.

When any one of the following timers is running, the terminal equipment is in the DRX activation time:

a DRX duration timer (DRX-onDurationTimer);

a DRX deactivation timer (DRX-inactivity timer);

a DRX downlink retransmission timer (DRX-retransmission timerdl);

DRX uplink retransmission timer (DRX-retransmission timer ul);

random access contention resolution timer (ra-ContentionResolutionTimer).

In addition, DRX active time also includes other situations, such as: a waiting period after the terminal device transmits a Scheduling Request (SR) on a Physical Uplink Control Channel (PUCCH); the terminal device has not received a PDCCH period indicating a new transmission after successfully receiving a Random Access Response (RAR) based on non-contention based random access.

At the beginning of the DRX cycle, the terminal device starts a timer DRX On Duration timer, i.e. enters "On Duration", which starts to run, i.e. enters DRX activation time, if during the DRX On Duration timer running, the terminal device receives a PDCCH indicating a new downlink or uplink data transmission, the terminal device starts or restarts the timer DRX On Duration timer, so that the terminal device is always in DRX activation time, which may be understood as the time length of the terminal device originally in the active state being "On Duration", and runs the DRX On Duration timer to extend the time of the terminal device in the active state until the DRX On Duration timer is reached, or the terminal device receives a related Media Access Control (MAC) control unit (CE) signaling to time out the DRX On Duration timer and the DRX On Duration timer, e.g. the MAC time out, the terminal device ends the active time and enters the inactive time, that is, the terminal device enters the inactive state from the active state. It is to be understood that "On Duration" described herein represents a time period determined by the timer drx-onduration timer, and has a length equal to the size of the timer drx-onduration timer configured by the network device.

The drx-inactivity timer is typically started or restarted the first symbol after the PDCCH indicating newly transmitted data. As shown in fig. 2, which is a state diagram of a DRX deactivation timer applicable in the embodiment of the present invention, the PDCCH in fig. 2 is used to schedule transmission of a new Physical Downlink Shared Channel (PDSCH).

As described above, the terminal device may continuously monitor the PDCCH when in the DRX active state, and may not monitor the PDCCH if the terminal device leaves the DRX active state and enters the DRX inactive state. Therefore, running DRX-inactivity timer during "On Duration" can make the terminal device stay in DRX active state longer, and continue monitoring PDCCH until DRX-inactivity timer stops running.

Third, hybrid automatic repeat request (HARQ)

For downlink transmission, after performing HARQ feedback for the downlink data, the terminal device may start an HARQ downlink timer (drx-HARQ-RTT-TimerDL) corresponding to the downlink HARQ process, where the timer is used to indicate a minimum duration before an SCI where downlink HARQ retransmission is expected or scheduled, and after the timer expires, if data decoding in the downlink HARQ process fails, the terminal device may start drx-retransmission TimerDL.

For example, if the terminal device receives one MAC PDU in the configured downlink allocation, the terminal device may start drx-HARQ-RTT-TimerDL of the corresponding downlink HARQ process at the first symbol after the end of transmission of the downlink HARQ feedback, and stop drx-retransmission TimerDL of the corresponding downlink HARQ process; or, if the terminal device receives a PDCCH indicating downlink transmission, the terminal device may start drx-HARQ-RTT-TimerDL of a corresponding downlink HARQ process at a first symbol after transmission of a downlink HARQ feedback is completed, and stop drx-retransmission TimerDL of the corresponding downlink HARQ process; or, if the data decoding of the corresponding downlink HARQ process fails when the drx-HARQ-RTT-TimerDL is out of time, the terminal device may start drx-retransmission TimerDL of the corresponding downlink HARQ process at the first symbol after the drx-HARQ-RTT-TimerDL is out of time.

DRX mechanism in four-side-link communication

To address the power consumption issue of terminal devices in sidelink communications, a DRX mechanism may be used in sidelink communications. The DRX mechanism in sidelink communication is similar to that in Uu port communication, in sidelink communication, if the DRX mechanism is introduced between the terminal device at the transmitting end and the terminal device at the receiving end, the terminal device at the receiving end receives at least one of PSCCH, psch, and SCI transmitted by the terminal device at the transmitting end only at the DRX activation time.

When using the DRX mechanism in sidelink communication, if a network device allocates a sidelink resource to a terminal device at a transmitting end, since the network device does not know the sidelink DRX activation time between the terminal device at the transmitting end and the terminal device at a receiving end, the time domain position of the sidelink resource may not be within the sidelink DRX activation time between the terminal device at the transmitting end and the terminal device at the receiving end. If the terminal equipment at the transmitting end transmits at least one of the PSCCH, and SCI using the sidelink resource, since the terminal equipment at the receiving end does not receive at least one of the PSCCH, and SCI within a sidelink DRX inactivity time, where the sidelink DRX inactivity time is a time other than the sidelink DRX inactivity time, and the SCI includes a first-level SCI, a second-level SCI, or a first-level SCI and a second-level SCI, the first-level SCI may be carried on the PSCCH, and the second-level SCI may be carried on the PSCCH. Therefore, the terminal equipment at the receiving end cannot receive at least one of PSCCH, and SCI. If the terminal equipment at the receiving end receives at least one of the PSCCH, and SCI, the terminal equipment at the receiving end also receives at least one of the PSCCH, and SCI during the side chain DRX inactivity time, which may cause the DRX mechanism to fail to work in the sidelink communication. If the terminal equipment at the transmitting end does not use the sidelink resource to transmit at least one of the PSCCH, the PSSCH and the SCI, the sidelink resource is wasted.

HARQ in side-link communication

When using the DRX mechanism in sidelink communications, the terminal device's sidelink DRX activation time may include the run time of a sidelink DRX duration timer DRX-onDurationTimerPC5, a sidelink DRX deactivation timer DRX-inactivityttimerpc 5, or a sidelink DRX retransmission timer DRX-retransmission timerpc5, during which the terminal device may monitor the PSCCH, or SCI. The side chain DRX may be a side chain DRX of a terminal device at a receiving end, or a side chain DRX between a terminal device at a transmitting end and a terminal device at a receiving end, or a side chain DRX between a pair of source and destination, where the source is a terminal device at a transmitting end identified by a source Layer-1ID, the destination is a terminal device at a receiving end identified by a destination Layer-1ID, or the source is a terminal device at a transmitting end identified by a source Layer-2ID, the destination is a terminal device at a receiving end identified by a destination Layer-2ID, where the Layer-1ID is 8LSB (least significant bit) of the Layer-2ID, that is, the Layer-1ID is the lower 8-bit of the Layer-2ID, and the source Layer-1ID is 8LSB of the Layer-2ID, and the destination Layer-1ID is the LSB of the Layer-2 ID. The PSCCH, psch, or SCI transmission is sent from a terminal device at a transmitting end to a terminal device at a receiving end, or from a source to a destination.

The terminal device may determine time domain and frequency domain resources for PSCCH transmission according to a time domain resource allocation field and a frequency domain resource allocation field included in the SCI and resources for PSCCH transmission, where the time domain resource allocation field indicates N resources and a slot offset of resources other than a first resource in the N resources, N may be 1, 2, or 3, a slot in which the first resource is located is a slot in which the SCI is located, the slot offset of the resources other than the first resource is a slot offset with respect to the first resource, and the frequency domain resource allocation field indicates the number of consecutive subchannels of each of the N resources and a starting subchannel index of the resources other than the first resource. However, since the run time of the DRX-retransmission timerpc5 is only related to the time domain position of the first resource, i.e. the time domain position of the resource other than the first resource may not be within the side chain DRX active time of the terminal device, the terminal device cannot listen to the transmissions on the N resources, thus causing the resources other than the first resource to be wasted.

Sixthly, cooperation between terminal devices (inter-UE coordination)

In sidelink communications, inter-terminal device cooperation includes terminal device a sending, to terminal device B, information indicating a set of resources, which may be referred to as sidelink resource information, which may be carried on a MAC CE, or included in an SCI, e.g., a second-level SCI, the set of resources indicated by the sidelink resource information may be one or more of:

1) Prioritized (preferred) resources for sidelink transmissions by terminal device B. For example, the terminal device a determines the preferred resource for the terminal device B to perform the sidelink transmission according to the detection result.

2) Non-prioritized (not preferred) resources for sidelink transmissions by terminal device B. For example, terminal a determines the non-preferred resource for terminal B to perform sidelink transmission according to the detection result and/or the potential resource conflict.

3) The conflicted resource. For example, terminal device a detects that the sidelink transmission resources to be used by terminal device B and terminal device C overlap, terminal device a detects the conflicted resource.

When using the DRX mechanism in sidelink communication, if a network device allocates sidelink resources to a terminal device at a transmitting end, the network device may not know the sidelink DRX activation time of the terminal device at the receiving end, and the time domain position of the sidelink resources may not be within the sidelink DRX activation time of the terminal device at the receiving end. If the terminal equipment at the transmitting end transmits at least one of the PSCCH, the PSSCH and the SCI by using the sidelink resources, the terminal equipment at the receiving end does not receive at least one of the PSCCH, the PSSCH and the SCI within the side chain DRX inactive time, so the terminal equipment at the receiving end cannot receive at least one of the PSCCH, the PSSCH and the SCI. If the terminal equipment at the receiving end receives at least one of the PSCCH, and SCI, the terminal equipment at the receiving end also receives at least one of the PSCCH, and SCI during the side chain DRX inactivity time, which may cause the DRX mechanism to fail to work in the sidelink communication. If the terminal equipment at the transmitting end does not use the sidelink resource to transmit at least one of the PSCCH, the PSSCH and the SCI, the sidelink resource is wasted.

If the SCI indicates N resources, the time domain positions of the resources other than the first resource may not be within the side chain DRX activation time of the terminal device at the receiving end, thereby causing a problem that the terminal device cannot monitor the transmission on the N resources and the resources other than the first resource are wasted.

Therefore, when the DRX mechanism is used in the sidelink communication, if the network device allocates the sidelink resource to the terminal device at the transmitting end, the time domain position of the sidelink resource may not be within the side chain DRX activation time of the terminal device at the receiving end, and thus the DRX mechanism may not work in the sidelink communication or the sidelink resource may be wasted.

In view of this, the terminal device and the network device in the embodiment of the present application determine the activation time of DRX by interaction, so as to avoid a situation that resources allocated by the base station are wasted.

It should be understood that the technical solution of the embodiments of the present application may be applied to various Communication systems, such as a fourth Generation (4th Generation, 4G) Communication system, a fifth Generation (5th Generation, 5G) Communication system, a Machine Type Communication (MTC) system, a device to device (D2D) system, an Internet of Things (IoT) system, a vehicle-to-evolution (V2X) system, a narrowband Internet of Things (Narrow Band Internet of Things (NB-IoT) system, and a new Communication system appearing in future Communication development, as long as a Communication entity in the Communication system may configure DRX parameters.

As shown in fig. 3, which is a schematic diagram of a network architecture applicable to the embodiment of the present application, the communication system includes a network device 301, a first terminal device 302 and a plurality of second terminal devices in sidelink communication with the first terminal device 302, wherein, the first terminal device 302 is a terminal device at a transmitting end in the sidelink communication, the second terminal device is a terminal device at a receiving end in the sidelink communication, the second terminal device comprises a second terminal device a303 and a second terminal device b304, in this communication system, a first terminal device 302 and a second terminal device a303 within the coverage of a network device 301 can communicate with the network device 301 via a Uu interface, the second terminal device b304 out of the coverage of the network device 301 may not communicate with the network device 301 through the Uu interface, and the first terminal device 302 may communicate with the second terminal device a303 and the second terminal device b304 through the PC5 interface.

The network device 301 may include, for example, AN Access Network (AN) device, a Radio Access Network (RAN) device, and AN access network device such as a base station (e.g., AN access point), which may refer to a device in the access network that communicates with a wireless terminal device through one or more cells over AN air interface. The base station may be configured to interconvert received air frames and Internet Protocol (IP) packets as a router between the terminal device and the rest of the access network, which may include an IP network. The network device may also coordinate attribute management for the air interface. For example, the network device may include an evolved Node B (NodeB or eNB or e-NodeB) in a Long Term Evolution (LTE) system or an advanced long term evolution (LTE-a), or may also include a next generation Node B (gNB) or a next generation evolved Node B (gNB) in a fifth generation mobile communication technology (5G) New Radio (NR) system: enhanced next generation base stations; the system may also include a Centralized Unit (CU) and a Distributed Unit (DU) in a Cloud RAN (Cloud RAN) system, or may also include a relay device, which is not limited in the embodiment of the present application.

The first terminal device 302, terminal device a303 and terminal device b304, comprise devices providing voice and/or data connectivity to a user, which may for example comprise handheld devices having wireless connection capabilities or processing devices connected to wireless modems. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchanging voice and/or data with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a D2D communication terminal device, a vehicle-to-evaluating (V2X) communication terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (IoT) terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber state), a mobile station (mobile state), a remote station (remote state), an access point (access point, AP), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), or a user equipment (user device), etc. For example, mobile telephones (or so-called "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included mobile devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and the like.

By way of example and not limitation, in the embodiments of the present application, the mentioned terminal device may also be a wearable device. Wearable equipment can also be called wearable smart device or intelligent wearable equipment etc. is the general term of using wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.

The various terminal devices described above may be considered as vehicle-mounted terminal devices if they are located on a vehicle, for example, placed in or mounted in the vehicle, and the vehicle-mounted terminal devices are also referred to as on-board units (OBUs), for example.

In the above, a communication system to which the embodiment of the present application is applicable is described, and then a DRX method provided by the embodiment of the present application is described with reference to the accompanying drawings.

It should be understood that the terms "system" and "network" in the embodiments of the present application may be used interchangeably. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a and b and c.

And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first priority criterion and the second priority criterion are only used for distinguishing different criteria, and do not represent the difference of the content, priority, importance, and the like of the two criteria.

In order to solve the first problem described above, that is, how to avoid a problem that if a network device allocates a sidelink resource to a terminal device at a transmitting end, a time domain position of the sidelink resource may not be within a side chain DRX activation time of the terminal device at a receiving end, so that a DRX mechanism cannot work, or the sidelink resource is wasted, the following scheme of embodiment 1 is provided in this application, and the following description specifically describes the scheme.

Example 1

As shown in fig. 4, an embodiment of the present application provides a DRX method, which can be applied to the communication system shown in fig. 3. The method comprises the following steps:

s401, the first terminal device sends a side chain DRX parameter or indication information of the second terminal device to the network device. Correspondingly, the network device receives the side chain DRX parameter or the indication information of the second terminal device, which is sent by the first terminal device.

In some embodiments, the indication information is used to indicate a start, an end, or a start and an end of a first period, the first period belonging to a sidechain DRX activation time of the second terminal device or the second terminal device being in a sidechain DRX activation state for the first period; alternatively, the indication information is used to indicate the beginning, the end, or the beginning and the end of the sidechain DRX activation time or sidechain DRX activation state of the second terminal device. The second terminal device is a device that performs sidelink communication with the first terminal device, and the number of the second terminal devices may be one or more, which is not specifically limited in this embodiment of the application.

It should be noted that in this embodiment of the application, the side chain DRX activation time of the second terminal device may be understood as a side chain DRX activation time between the first terminal device and the second terminal device, or may also be understood as a side chain DRX activation time between a pair of source and destination, where the source is a first terminal device identified by a source layer-1ID, the destination is a second terminal device identified by a destination layer-1ID, or the source is a first terminal device identified by a source layer-2ID, the destination is a second terminal device identified by a destination layer-2ID, one first terminal device may correspond to at least one source, and one second terminal device may correspond to at least one destination.

It should be noted that, in the embodiment of the present application, the terminal device within the side chain DRX activation time is in the side chain DRX activation state; the terminal device not within the sidechain DRX active time is in the sidechain DRX inactive state, or the terminal device within the sidechain DRX inactive time is in the sidechain DRX inactive state.

In step 401, the first terminal device may notify the network device of the first period or the side chain DRX activation time of the second terminal device in two ways, and the following describes specific implementations of the two ways in detail with reference to specific examples respectively:

In the first mode, the first terminal device may send the side chain DRX parameter of the second terminal device to the network device, and correspondingly, the network device receives the side chain DRX parameter of the second terminal device sent by the first terminal device. The network device may determine the first period based on the DRX sidechain parameter, where the first period belongs to a DRX activation time of the second terminal device, or the second terminal device is in an active state in the first period, the second terminal device is a device performing sidelink communication with the first terminal device, and the number of the second terminal devices may be one or more, which is not specifically limited in this embodiment of the present application.

Or, the first terminal device may send the side chain DRX parameter of the second terminal device to the network device, and accordingly, the network device receives the side chain DRX parameter of the second terminal device sent by the first terminal device. The network device may determine a side chain DRX activation time of a second terminal device based on the side chain DRX parameter, where the second terminal device is a device performing a side link communication with the first terminal device, and the number of the second terminal devices may be one or more, which is not specifically limited in the embodiment of the present application.

It should be noted that, in the embodiment of the present application, the side chain DRX parameter may include any one or a combination of more than one of the following:

DRX-StartOffsetPC5 for indicating a starting position of a side chain DRX cycle (cycle), wherein the starting position of the side chain DRX cycle comprises one or more of the following combinations: starting subframe, time slot and symbol;

DRX-SlotOffsetPC5 for indicating the time delay before starting DRX-onDurationTimerPC5 at the start position of the sideline DRX cycle, i.e. the terminal device starts DRX-onDurationTimerPC5 after DRX-SlotOffsetPC5 at the start position of the sideline DRX cycle;

DRX-onDurationTimerPC5, for indicating the Duration of the beginning of the sidechain DRX cycle, i.e. the "On Duration" of the DRX cycle, i.e. "On Duration" indicates a time period, which is determined by DRX-onDurationTimerPC5, and the length is equal to the size of DRX-onDurationTimerPC5, at the beginning of the sidechain DRX cycle, the terminal device starts DRX-onDurationTimerPC5, i.e. enters "On Duration", and DRX-onDurationTimerPC5 starts to run, i.e. enters the sidechain DRX activation time;

drx-InactivityTimerPC5 for indicating a duration of time after transmission of a PSCCH, PSSCH, SCI or MAC PDU, where the SCI includes a first-level SCI, a second-level SCI, or both, the first-level SCI may be carried on the PSCCH, the second-level SCI may be carried on the PSSCH, the PSSCH transmission may be a new transmission, and accordingly, the PSCCH or SCI is used to schedule the new transmission, or the PSSCH transmission may be a new transmission or a retransmission, and the PSCCH or SCI is used to schedule the new transmission or the retransmission. For example, if the terminal device receives PSCCH or SCI indication to perform new data transmission On the side during the DRX activation time, the terminal device may start or restart DRX-inactivity timer PC5, so that the terminal device is always in the DRX activation time, which may be understood as the time length of "On Duration" of the time length that the terminal device originally is in the DRX activation state, run DRX-inactivity timer PC5 may extend the time that the terminal device is in the DRX activation state until DRX-inactivity timer PC5 times out, or the terminal device receives related MAC CE signaling to stop DRX-onduration timer PC5 and DRX-inactivity timer 5, for example, DRX Command PC5MAC CE, the terminal device ends the DRX activation time to enter the DRX inactivity time, that is, the terminal device enters the DRX inactivity state from the DRX state;

drx-retransmission timerpc5 for indicating a maximum duration before a received or scheduled SCI of a sidelink HARQ retransmission, wherein different sidelink processes may correspond to different drx-retransmission timerpc 5;

drx-HARQ-RTT-TimerPC5 for indicating a minimum duration before a SCI for which a sidelink HARQ retransmission is expected or scheduled, wherein different sidelink processes may correspond to different drx-HARQ-RTT-TimerPC 5;

for example, if the terminal device receives the PSCCH, psch, SCI, or MAC PDU, the terminal device may start the drx-HARQ-RTT-TimerPC5 of the corresponding sidechain process at the first symbol, timeslot, subframe, or minislot after the end of transmission of the sidechain HARQ feedback, or the terminal device may start the drx-HARQ-RTT-TimerPC5 of the corresponding sidechain process at the first symbol, timeslot, subframe, or minislot after the end of transmission of the PSCCH, psch, SCI, or MAC PDU, at which time the drx-retransmission TimerPC5 of the corresponding sidechain process may be stopped, or the drx-retransmission TimerPC5 of the corresponding sidechain process may not be stopped, which is not specifically limited in this embodiment. If drx-HARQ-RTT-TimerPC5 times out and data decoding of the corresponding sidelink process fails, the terminal device may start drx-retransmission TimerPC5 of the corresponding sidelink process at the first symbol, slot, subframe, or minislot after drx-HARQ-RTT-TimerPC5 times out, that is, if data decoding of the corresponding sidelink process succeeds, drx-retransmission TimerPC5 is not started;

Or, if the terminal device receives the PSCCH, psch, SCI, or MAC PDU and the data decoding of the corresponding sidechain process fails, the terminal device may start drx-HARQ-RTT-TimerPC5 of the corresponding sidechain process at the first symbol, timeslot, subframe, or minislot after the end of transmission of the sidechain HARQ feedback, and at this time, may stop drx-retransmission TimerPC5 of the corresponding sidechain process, or may not stop drx-retransmission TimerPC5 of the corresponding sidechain process, which is not specifically limited in this embodiment of the application. That is, if the data decoding of the corresponding sidelink process is successful, the drx-HARQ-RTT-TimerPC5 is not started. If drx-HARQ-RTT-TimerPC5 is overtime, the terminal device may start drx-retransmission TimerPC5 of the corresponding side-chain process at the first symbol, timeslot, subframe or minislot after drx-HARQ-RTT-TimerPC5 is overtime;

or, if the terminal device receives the PSCCH, psch, SCI, or MAC PDU and the side chain HARQ feedback of the corresponding PSCCH, psch, SCI, or MAC PDU is NACK, the terminal device may start drx-HARQ-RTT-TimerPC5 of the corresponding side chain process at the first symbol, timeslot, subframe, or minislot after the end of transmission of the side chain HARQ feedback, and at this time, may stop drx-retransmission TimerPC5 of the corresponding side chain process, or may not stop drx-retransmission TimerPC5 of the corresponding side chain process, which is not specifically limited in this embodiment of the present application. That is, if the sidelink HARQ feedback of the corresponding PSCCH, psch, SCI, or MAC PDU is ACK, drx-HARQ-RTT-TimerPC5 is not initiated. If drx-HARQ-RTT-TimerPC5 is overtime, the terminal device may start drx-retransmission TimerPC5 of the corresponding side-chain process at the first symbol, timeslot, subframe or minislot after drx-HARQ-RTT-TimerPC5 is overtime;

Or, if the terminal device receives the PSCCH, psch, SCI, or MAC PDU and the data decoding of the corresponding sidelink process fails, the terminal device may start a drx-retransmission timerpc5 of the corresponding sidelink process at a first symbol, slot, subframe, or minislot after the end of transmission carrying the sidelink HARQ feedback, or, if the terminal device receives the PSCCH, psch, SCI, or MAC PDU, the terminal device may start a drx-retransmission timerpc5 of the corresponding sidelink process at a first symbol, slot, subframe, or minislot after the end of transmission of the PSCCH, psch, SCI, or MAC PDU, and stop the drx-retransmission timerpc5 if the data decoding of the corresponding sidelink process succeeds;

alternatively, if the terminal device receives the PSCCH, SCI, or MAC PDU and the sidechain HARQ feedback of the corresponding PSCCH, SCI, or MAC PDU is NACK, the terminal device may start drx-retransmission timestampc 5 of the corresponding sidechain process at the first symbol, slot, subframe, or mini-slot after the end of transmission carrying the sidechain HARQ feedback, or if the terminal device receives the PSCCH, SCI, or MAC PDU, the terminal device may start drx-retransmission timestampc 5 of the corresponding sidechain process at the first symbol, slot, subframe, or mini-slot after the end of transmission of the PSCCH, SCI, or MAC PDU and stop drx-retransmission pcs 5 if the HARQ feedback of the corresponding PSCCH, SCI, or MAC PDU is ACK.

In the embodiment of the present application, the DRX-StartOffsetPC5, DRX-SlotOffsetPC5, DRX-ondurationtimerpc 5, DRX-inactivityttimerpc 5, DRX-retransmission TimerPC5, and DRX-HARQ-RTT-TimerPC5 are merely examples of names of different DRX parameters, and are not limited to names of different DRX parameters.

It should be noted that in the embodiment of the present application, the various timers, such as drx-onddudrationtimerpc 5, drx-InactivityTimerPC5, drx-retransmission TimerPC5, and drx-HARQ-RTT-TimerPC5, are in a running state once started, until the timer is stopped or times out; otherwise, the timer is not in a running state. If the timer is not running, the timer may be started. After the timer is stopped or times out, the timer is not in a running state until the timer is started. If the timer is in the running state, the timer may be restarted. The length of time of the timer may be understood as the length of time the timer runs continuously from the start or restart until the time-out. The value of the timer is its initial value at start-up or restart. The initial value of the timer may be the length of time of the timer. The value of the timer is the length of time of the timer at start-up or restart. It should be noted that, in this embodiment of the present application, the side chain DRX parameter may be configured by a first terminal device, that is, by a terminal device at a transmitting end in the sidelink communication, or may be configured by a second terminal device, that is, by a terminal device at a receiving end in the sidelink communication, where one side configuring the side chain DRX parameter transmits the side chain DRX parameter to another side in the sidelink communication, or may be configured by a network device, and the network device transmits the side chain DRX parameter to a device performing the sidelink communication, which is not specifically limited in this embodiment of the present application.

It should be noted that, in the embodiment of the present application, if the number of the second terminal devices performing the sidelink communication with the first terminal device is multiple or if the number of destinations performing the sidelink communication with the source is multiple, wherein, the source is a first terminal device identified by source layer-1ID or source layer-2ID, the destination is a second terminal device identified by destination layer-1ID or destination layer-2ID, at least one second terminal device, the second terminal device to be transmitted, the destination or the destination to be transmitted of the data is in the side chain DRX activation time in the first period or the side chain DRX activation time of the second terminal device, the first period of time or the side chain DRX activation time of the second terminal device may be a continuous period of time or may not be a continuous period of time, which is not specifically limited in this embodiment of the application.

The first period of time or the side chain DRX activation time of the second terminal device may include a specific side chain DRX activation time of each second terminal device, for example, if there are three second terminal devices in the sidelink communication with the first terminal device, and the side chain DRX activation times of the three second terminal devices are a first side chain DRX activation time, a second side chain DRX activation time, and a third side chain DRX activation time, respectively, the side chain DRX activation times of the first period of time or the second terminal device may include the first side chain DRX activation time, the second side chain DRX activation time, and the third side chain DRX activation time.

The first period or the side chain DRX activation time of the second terminal device may also include an intersection or a union of the side chain DRX activation times of at least two second terminal devices, for example, any one or more of the following combinations: the earliest starting time in the side chain DRX activation time of each second terminal device to the earliest ending time in the side chain DRX activation time of each second terminal device; the earliest starting time in the side chain DRX activation time of each second terminal device to the latest ending time in the side chain DRX activation time of each second terminal device; the latest starting time in the side chain DRX activation time of each second terminal device to the earliest ending time in the side chain DRX activation time of each second terminal device; the latest end time of the side chain DRX activation time of each second terminal device is reached; the side chain DRX activation time of any second terminal equipment begins or ends to the side chain DRX activation time of any second terminal equipment begins or ends.

For example, if the number of the second terminals performing the sidelink communication with the first terminal is three, the side chain DRX activation time of the first second terminal is 11:25 to 11:30, the side chain DRX activation time of the second terminal is 11:28 to 11:32, and the side chain DRX activation time of the third second terminal is 11:31 to 11:35, the intersection or the union of the side chain DRX activation times of the at least two second terminals may be 11:25 to 11:30, 11:25 to 11:35, 11:30 to 11:31, 11:31 to 11:35, 11:28 to 11:35, 11:25 to 11:28, 11:28 to 11:30, 11:31 to 11:32, or 11:32 to 11: 35.

The above is only an example of the intersection or the union of the side chain DRX activation times of at least two second terminal devices, and as long as the intersection or the union overlaps with the side chain DRX activation time of any second terminal device, as for the manner of determining the intersection or the union, this embodiment of the present application is not specifically limited to this.

The first period or the side chain DRX activation time of the second terminal device may also include an intersection or a union of the side chain DRX activation times of at least two second terminal devices having data to be transmitted, for example, a combination of any one or more of the following: the earliest starting time in the side chain DRX activation time of each second terminal device to which data is to be transmitted to the earliest finishing time in the side chain DRX activation time of each second terminal device to which data is to be transmitted; the earliest starting time in the side chain DRX activation time of each second terminal device to which data are to be transmitted to the latest finishing time in the side chain DRX activation time of each second terminal device to which data are to be transmitted; the latest starting time in the side chain DRX activation time of each second terminal device to which data are to be transmitted to the earliest ending time in the side chain DRX activation time of each second terminal device to which data are to be transmitted; the latest starting time in the side chain DRX activation time of each second terminal device to which data are to be transmitted to the latest finishing time in the side chain DRX activation time of each second terminal device to which data are to be transmitted; and the side chain DRX activation time of any second terminal equipment with data to be transmitted begins or ends to the side chain DRX activation time of any second terminal equipment with data to be transmitted begins or ends.

It should be noted that, in this embodiment of the application, the side chain DRX activation time of the first period or the second terminal device may be understood as a side chain DRX activation time of a destination of data to be transmitted, and the side chain DRX activation time of any destination does not change in the period of time.

It should be noted that, in this embodiment of the application, the second terminal device to which data is to be transmitted may be understood as data to be transmitted by the first terminal device to the second terminal device or any destination corresponding to the second terminal device, and specifically may be sidelink data of a logical channel of the second terminal device that is available in the MAC entity of the first terminal device or the first terminal device, or the sidelink data of the logical channel of the second terminal device may be provided to the MAC entity of the first terminal device or the first terminal device, or the sidelink data of the logical channel of the second terminal device may be used in the MAC entity of the first terminal device or the first terminal device, or the sidelink data of the logical channel of the second terminal device appears or exists in the MAC entity of the first terminal device or the first terminal device.

Optionally, when the situation of the to-be-transmitted data of the second terminal device changes, for example, the first terminal device sends the to-be-transmitted data to the second terminal device by using a resource indicated by the side chain authority sent by the network device, or one second terminal device that does not have the to-be-transmitted data before has the to-be-transmitted data, the side chain DRX activation time of the first period or the second terminal device may change, and the network device needs to re-determine the first period or re-determine the side chain DRX activation time of the second terminal device.

It should be noted that in the embodiment of the present application, the DRX activation time of the second terminal device may include the operation time of DRX-onDurationTimerPC5 and DRX-inactivityttimerpc 5, for example, at the start time of the DRX cycle, the second terminal device starts DRX-onDurationTimerPC5, that is, enters "On Duration", timexturationtimerpc 5 starts to operate, that is, enters the DRX activation time of the sidechain, during DRX-onDurationTimerPC5 operation, the second terminal device starts or restarts DRX-inactivitytyprpc 5, the sidechain DRX activation time is extended, since DRX-inactivityperpc 5 maintained by the second terminal device is consistent with the state of DRX-inactivityperpc 5 maintained by the first terminal device and the network device, the first terminal device and the network device may also start DRX apparatuses DRX 2, DRX networks, or inactivityperpc 5, or network apparatuses may start the network DRX apparatuses, the drx-InactivityTimerPC5 may also be explicitly started or restarted, which is not specifically limited in the embodiments of the present application.

In a second mode, the first terminal device may send the indication information to the network device, and correspondingly, the network device receives the indication information sent by the first terminal device. The network device may determine the first time period based on indication information, where the indication information is used to indicate a start, an end, or a start and an end of the first time period, where the first time period belongs to a sidelink DRX activation time of the second terminal device, or the second terminal device is in a sidelink DRX activation state in the first time period, the second terminal is a device that performs sidelink communication with the first terminal device, and the number of the second terminal devices may be one or more, which is not specifically limited in this embodiment of the present application.

Or, the first terminal device may send the indication information to the network device, and accordingly, the network device receives the indication information sent by the first terminal device. The network device may determine a sidechain DRX active time of the second terminal device, or determine whether the second terminal device is in the sidechain DRX active time, or determine whether the second terminal device is in the sidechain DRX inactive time, or determine a sidechain DRX state of the second terminal device, such as the second terminal device is in the sidechain DRX active state or the sidechain DRX inactive state, based on the indication information, wherein the indication information indicates a start, an end, or a start and an end of the sidechain DRX active time or the sidechain DRX active state of the second terminal device, or indicates that the second terminal device is in the sidechain DRX active time, or the second terminal device is in the sidechain DRX inactive time or the sidechain DRX state of the second terminal device, such as the second terminal device is in the sidechain DRX active state or the sidechain DRX inactive state, the second terminal is a device for sidechain communication with the first terminal device, the number of the second terminal devices may be one or more, and the embodiment of the present application is not particularly limited.

In the embodiment of the present application, the indication information may be included in UCI, PUCCH, MAC CE, and Radio Resource Control (RRC) message.

It should be noted that, in this embodiment of the application, before the first terminal device sends the indication information to the network device, the first terminal device needs to determine the first period or the side chain DRX activation time of the second terminal device, wherein if the number of second terminal equipments in sidelink communication with the first terminal equipment is plural or if the number of destinations in sidelink communication with the source is plural, at least one second terminal device, the second terminal device to be transmitted, the destination or the destination of the data to be transmitted is in the side chain DRX activation time in the first period determined by the first terminal device or the side chain DRX activation time of the second terminal device, the first period determined by the first terminal device or the side chain DRX activation time of the second terminal device may be a continuous period of time or may not be a continuous period of time, which is not specifically limited in this embodiment of the application.

For example, if there are three second terminals performing sidelink communication with the first terminal, and the sidelink DRX activation times of the three second terminals are the first sidelink DRX activation time, the second sidelink DRX activation time, and the third sidelink DRX activation time, respectively, the first period determined by the first terminal or the sidelink DRX activation time of the second terminal may include the first sidelink DRX activation time, the second sidelink DRX activation time, and the third sidelink DRX activation time.

The first period determined by the first terminal device or the side chain DRX activation time of the second terminal device may also include an intersection or a union of the side chain DRX activation times of at least two second terminal devices, for example, a combination of any one or more of the following: the earliest starting time in the side chain DRX activation time of each second terminal device to the earliest ending time in the side chain DRX activation time of each second terminal device; the earliest starting time in the side chain DRX activation time of each second terminal device to the latest ending time in the side chain DRX activation time of each second terminal device; the latest starting time in the side chain DRX activation time of each second terminal device to the earliest ending time in the side chain DRX activation time of each second terminal device; the latest starting time in the side chain DRX activation time of each second terminal device to the latest finishing time in the side chain DRX activation time of each second terminal device; the side chain DRX activation time of any second terminal equipment begins or ends to the side chain DRX activation time of any second terminal equipment begins or ends.

The first period determined by the first terminal device or the side chain DRX activation time of the second terminal device may also include an intersection or a union of the side chain DRX activation times of at least two second terminal devices having data to be transmitted, for example, any one or more of the following combinations: the earliest starting time in the side chain DRX activation time of each second terminal device to which data is to be transmitted to the earliest finishing time in the side chain DRX activation time of each second terminal device to which data is to be transmitted; the earliest starting time in the side chain DRX activation time of each second terminal device to which data are to be transmitted to the latest finishing time in the side chain DRX activation time of each second terminal device to which data are to be transmitted; the latest starting time in the side chain DRX activation time of each second terminal device to which data are to be transmitted to the earliest ending time in the side chain DRX activation time of each second terminal device to which data are to be transmitted; the latest starting time in the side chain DRX activation time of each second terminal device to which data are to be transmitted to the latest finishing time in the side chain DRX activation time of each second terminal device to which data are to be transmitted; and the side chain DRX activation time of any second terminal equipment with data to be transmitted begins or ends to the side chain DRX activation time of any second terminal equipment with data to be transmitted begins or ends. This is not particularly limited in the embodiments of the present application.

It should be noted that, in this embodiment of the application, the first period determined by the first terminal device or the side chain DRX activation time of the second terminal device may be understood as the side chain DRX activation time of the destination of the data to be transmitted, and the side chain DRX activation time of any destination does not change in the period.

Optionally, when the situation of the to-be-transmitted data of the second terminal device changes, for example, the first terminal device uses a resource indicated by the side chain authority sent by the network device to send the to-be-transmitted data to the second terminal device corresponding to the side chain authority, or one second terminal device without the to-be-transmitted data before has the to-be-transmitted data, the first time period determined by the first terminal device or the side chain DRX activation time of the second terminal device determined by the first terminal device may change, and the first terminal device needs to re-determine the first time period or re-determine the side chain DRX activation time of the second terminal device.

For example, the first terminal device may send the indication information to the network device by any one of the following methods, where the indication information may indicate the start, the end, or the start and the end of the first period, may also indicate the end, or the start and the end of the side chain DRX activation time of the second terminal device, or indicate that the second terminal device is in the side chain DRX activation time, or the second terminal device is in the side chain DRX deactivation time or the side chain DRX state of the second terminal device, such as the second terminal device is in the side chain DRX activation state or the side chain DRX deactivation state:

(1) As shown in fig. 5a, the first terminal device sends first indication information to the network device, and accordingly, the network device receives the first indication information from the first terminal device, where the first indication information is used to indicate an end time of the first time period. It should be noted that, in this embodiment of the application, the first period belongs to a side chain DRX activation time of the second terminal device, and the first period may completely coincide with the side chain DRX activation time of the second terminal device, or may not completely coincide with the side chain DRX activation time of the second terminal device, which is only the case of incomplete coincidence in fig. 5 a.

It should be noted that, in this embodiment of the application, the first terminal device may send the first indication information to the network device at the starting time of the first time period, or after the starting time of the first time period, or within the first time period. Optionally, if the ending time of the first time interval changes compared with the ending time of the first time interval reported last time, the first terminal device may transmit the first indication information to the network device at any time within the first period of time, or, if the ending time of the first time interval is earlier than the ending time of the first time interval reported last time, the first terminal device may send first indication information to the network device upon a change in the first period of time, e.g., when the first terminal device has no data to be sent to the second terminal device, the first time period will change, or, if the ending time of the first time interval is later than or equal to the ending time of the last reported first time interval, the first terminal device may send the first indication information to the network device at the end time of the last reported first time period or at a time a period before the end time of the last reported first time period.

It should be noted that, in this embodiment of the present application, the time that is a certain interval before the ending time may be determined according to DCI sent by the network device to the first terminal device. Specifically, the DCI sent by the network device to the first terminal device includes a "Time gap" field, where a value m of the field indicates an index m +1 of a slot offset table, where the slot offset table is a parameter configured by the network device, for example, a timegapfirstsidelingtransmission or sl-DCI-ToSL-Trans, and the table is used to indicate a slot offset between receiving the DCI and a first sidelink transmission scheduled by the DCI, that is, a slot offset between receiving the DCI and the first sidelink transmission indicated in a sidelink authority included in the DCI. The specific form of the table may include one or more slot offsets, and the precedence order of the one or more slot offsets implicitly indicates the index, for example, the first slot offset corresponds to index 1, and the second slot offset corresponds to index 2. The table may also indicate, explicitly, the index to which each slot offset corresponds. Assume that K is used for the slot offset corresponding to the index m +1_SLIndicating that the time slot of the first sidelink transmission of the DCI scheduling is not earlier than

The first sidelink time slot in the resource pool of (1), wherein T_DLIs the starting time, T, of the downlink time slot in which the DCI is located_TAIs a Timing Advance (TA) value, T_slotIs the duration of the sidelink time slot. The time of the interval before the ending time may be determined according to the slot offset table, for example, the interval before the ending time may be the minimum value or the maximum value in the slot offset table, or the time of the interval before the ending time is the ending time of the first slot, where the time slot of the first sidelink transmission scheduled by the DCI in the first slot is not earlier than T_DL，

When the first sidelink transmission time slot in the resource pool is the first sidelink transmission time slot scheduled by the DCI in the first time slot, the time slot of the first sidelink transmission in the DCI scheduling in the first time slot is the last time slot before the end timeThe first sidelink transmission scheduled by the DCI in the first slot may be partially before the ending time, partially after the ending time, or completely before the ending time, or the starting time of the first slot is not earlier than the starting time of the first slot

The first sidelink timeslot in the resource pool of (1) is the last timeslot before the end time, where T is_{DL, first time slot}Is the start time of the first time slot, K _SL,min/maxIs the minimum or maximum value in the slot offset table.

Or, as shown in fig. 5b, the first terminal device sends first indication information to the network device, and accordingly, the network device receives the first indication information from the first terminal device, where the first indication information is used to indicate an end time of the side chain DRX activation time of the second terminal device.

It should be noted that, in this embodiment of the application, the first terminal device may send the first indication information to the network device at or after the start time of the side chain DRX activation time of the second terminal device or within the side chain DRX activation time of the second terminal device. Optionally, if the ending time of the side chain DRX activation time changes compared with the ending time of the side chain DRX activation time reported last time, the first terminal device may send the first indication information to the network device at any time within the side chain DRX activation time, or, if the ending time of the side chain DRX activation time is earlier than the ending time of the side chain DRX activation time reported last time, the first terminal device may send the first indication information to the network device when the side chain DRX activation time changes, or, if the ending time of the side chain DRX activation time is later than or equal to the ending time of the side chain DRX activation time reported last time, the first terminal device may send the first indication information to the network device at the ending time of the side chain DRX activation time reported last time or at a time interval before the ending time.

(2) As shown in fig. 5c, the first terminal device sends the second indication information to the network device at the beginning time or after the beginning time of the first time period or within the first time period, and sends the third indication information to the network device at the end time of the first time period or before the end time of the first time period by an interval, and accordingly, the network device receives the second indication information and the third indication information from the first terminal device, wherein the second indication information is used for indicating that the first time period begins or has begun or is within the first time period, and the third indication information is used for indicating that the first time period has ended or is about to end.

It should be noted that, in this embodiment of the application, the first period belongs to a side chain DRX activation time of the second terminal device, and the first period may completely coincide with the side chain DRX activation time of the second terminal device, or may not completely coincide with the side chain DRX activation time of the second terminal device, which is only the case of incomplete coincidence in fig. 5 c.

Or, as shown in fig. 5d, the first terminal device sends the second indication information to the network device after the beginning time or beginning time of the side chain DRX activation time of the second terminal device or within the side chain DRX activation time of the second terminal device, and sends the third indication information to the network device at a time spaced before the ending time or ending time of the side chain DRX activation time of the second terminal device, and accordingly, the network device receives the second indication information and the third indication information from the first terminal device, wherein the second indication information is used for indicating that the side chain DRX activation time of the second terminal device has started, and the third indication information is used for indicating that the side chain DRX activation time of the second terminal device has ended or is about to end.

For example, the first terminal device may transmit indication information to the network device, wherein the indication information may indicate a start and a time length of the first period or the side chain DRX activation time, or indicate a start time and an end time of the first period or the side chain DRX activation time, or indicate a time length of the first period or the side chain DRX activation time.

It should be noted that, in this embodiment of the application, the first terminal device may send the indication information to the network device when a Buffer Status Report (BSR) is triggered, or, if an end time of the first period or the side chain DRX activation time changes from an end time of a last reported first period or a last reported side chain DRX activation time, the first terminal device may send the indication information to the network device at any one of the first period or the side chain DRX activation time, or, if the end time of the first period or the side chain DRX activation time is earlier than the end time of the last reported first period or the last reported side chain DRX activation time, the first terminal device may send the indication information to the network device at the first period or the last reported side chain DRX activation time, or, if the end time of the first period or the last reported side chain DRX activation time is later than or equal to the end time of the last reported first period or the last reported side chain DRX activation time, the first terminal device may send the indication information to the network device at the end time or a time interval before the end time of the first period or the side chain DRX activation time reported last time, or the first terminal device sends the indication information to the network device at the start time or the start time of the first period or the side chain DRX activation time.

It should be noted that, in this embodiment of the present application, the indication information sent by the first terminal device to the network device may also be a BSR used for providing side-chain data volume information to the network device. The side chain BSR may indicate buffer data of a Logical Channel Group (LCG) of each destination corresponding to the first terminal device, and if a buffer size of at least one destination corresponding to the first terminal device changes from non-0 to 0, the side chain BSR is triggered, where the buffer of the destination includes buffers of all LCGs of the destination.

Alternatively, if the side chain BSR is a truncated (truncated) side chain BSR, the truncated side chain BSR is not sent or is cancelled. If the destination is not in the side chain DRX activation time, the side chain BSR does not contain the relevant information of the destination, such as the destination index, the LCG ID, the buffer size and the like. If the destination is not in the side chain DRX activation time, the side chain data of the destination does not trigger the side chain BSR, namely, the destination corresponding to the side chain data triggering the side chain BSR needs to be satisfied in the side chain DRX activation time. If a side chain BSR is triggered, the destination corresponding to the LCG contained in the side chain BSR needs to be satisfied within the side chain DRX activation time. If a destination is not within the side chain DRX activation time, the side chain BSR does not contain the LCG of the destination. If a side chain BSR is triggered and a destination corresponding to the LCG contained in the side chain BSR is not in the side chain DRX activation time, the buffer size of the LCG of the destination is 0.

It should be noted that, in this embodiment of the application, the indication information sent by the first terminal device to the network device may also be information used to indicate that the cache size of at least one destination is changed from non-0 to 0, where the cache of the destination includes caches of all LCGs of the destination. The network device may estimate which destination data is transmitted by the first terminal device using the resource indicated by the side chain authority according to the indication information, so as to estimate the side chain DRX activation time or the side chain DRX activation state of the destination.

It should be noted that, in this embodiment of the application, step 401 is an optional step, and the first terminal device may send, to the network device, a side chain DRX parameter or indication information of the second terminal device. The network device may determine the first period or the side chain DRX activation time based on the side chain DRX parameter or the indication information, the first terminal device may not send the side chain DRX parameter or the indication information of the second terminal device to the network device, the network device may determine the first period or the side chain DRX activation time based on the self-configured side chain DRX parameter of the second terminal device, or the network device may determine the first period or the side chain DRX activation time based on the side chain DRX parameter of the second terminal device sent by any second terminal device.

It should be noted that, in this embodiment of the application, the first terminal device or the second terminal device or the network device may determine the end time of the side chain DRX activation time of the second terminal device according to DRX-inactivity timerpc5, for example, the end time of the side chain DRX activation time is the timeout time of DRX-inactivity timerpc5, or the first terminal device or the second terminal device or the network device may determine whether a certain time is within the side chain DRX activation time of the second terminal device according to the state of DRX-inactivity timerpc5, for example, the DRX-inactivity timerpc5 is running at a certain time, the time is within the side chain DRX activation time of the second terminal device, or the first terminal device or the second terminal device or the network device may directly determine the DRX side chain DRX activation time of the second terminal device without starting or restarting DRX-inactivity timerpc5, for example, the length of the DRX side chain DRX activation time of the DRX-inactivity timerpc5 or the length of the DRX-inactivity timerpc5 is equal to the DRX activation time length of DRX-inactivity timerpc5 The time of day.

S402, the network equipment sends the side chain authority to the first terminal equipment. Accordingly, the first terminal device receives the side-chain authority from the network device. Wherein the side-chain right is used for indicating, scheduling or allocating the resource for the first terminal equipment to transmit the PSCCH, PSSCH or SCI.

In some embodiments, the side chain permission is used to indicate, schedule, or allocate a resource for the first terminal device to transmit the PSCCH, psch, or SCI, and then, taking the example that the side chain permission is used to indicate a resource for the first terminal device to transmit the PSCCH, psch, or SCI as an example, a time domain position of the resource may be within a side chain DRX activation time of the first time period or the second terminal device, or the time domain position of the resource may not be within the side chain DRX activation time of the first time period or the second terminal device, which is not limited in this embodiment of the present application.

It should be noted that, in the embodiment of the present application, the side-chain authority may be included in Downlink Control Information (DCI), a MAC CE, or an RRC message.

It should be noted that, in this embodiment of the present application, the network device may further send device identification information to the first terminal device, where the device identification information is used to indicate the second terminal device corresponding to the side chain authority, that is, indicate that the first terminal device may send PSCCH, or SCI to the second terminal device indicated by the device identification information on the resource indicated by the side chain authority. Correspondingly, the first terminal device receives device identification information from the network device, and determines a second terminal device corresponding to the side chain authority based on the device identification information, the first terminal device uses the resource indicated by the side chain authority to send PSCCH, psch or SCI to the second terminal device, wherein the device identification information may be a destination ID, such as sl-destination identity, for identifying a destination of a side link communication, and the sl-destination identity may be a destination layer-2ID, or the device identification information may be a destination Index, such as a destination Index, for indicating a destination information list or a destination request list sent by the first terminal device to the network device, a destination corresponding to one of the destination information elements or an entry (entry element, IE) in the resource request list, such as a destination Index corresponding to one of the destination elements or an entry (entry sequence, such as a first entry Index corresponding to one of the destination element or entry sequence number 0 in the destination list, and the destination index is 1 corresponding to the second IE or destination corresponding to the entry in the list.

It should be noted that, in the embodiment of the present application, the device identification information may be included in a DCI, a MAC CE, or an RRC message for transmitting the side chain authority.

It should be noted that, in this embodiment of the present application, if some second terminal devices in one or more second terminal devices communicating with the first terminal device apply the side chain DRX, and some second terminal devices do not apply the side chain DRX, optionally, the network device may indicate device identification information corresponding to the side chain permission to both the second terminal device applying the side chain DRX and the second terminal device not applying the side chain DRX, and the first terminal device may send PSCCH, psch, or SCI to the second terminal device applying the side chain DRX, which is indicated by the network device, using a resource indicated by the side chain permission. Or, the network device may indicate, to the second terminal device to which the side chain DRX is applied, device identification information corresponding to the side chain authority, and not indicate, to the second terminal device to which the side chain DRX is not applied, the first terminal device may send PSCCH, or SCI to the second terminal device to which the side chain DRX is applied, which is indicated by the network device, using the resource indicated by the side chain authority, and for the second terminal device to which the side chain DRX is not applied, the first terminal device may determine, to the second terminal device to which the side chain DRX is not applied, and send PSCCH, or SCI to the second terminal device to which the side chain DRX is applied, which is corresponding to the side chain authority, using the resource indicated by the side chain authority.

It should be noted that, in the embodiment of the present application, the device identification information may be included in the DCI for transmitting the side chain authority by any one of the following methods:

(1) the DCI comprises X-th indication information, wherein the X-th indication information is used for indicating whether a Y-th domain exists or whether the Y-th domain is effective, and the Y-th domain indicates the device identification information of the second terminal device corresponding to the side chain authority. If the Xth indication information indicates that the Yth domain exists or the Yth domain is valid, the first terminal device can use the resource indicated by the side chain authority to send the PSCCH, the PSSCH or the SCI to the second terminal device which is indicated by the Yth domain and applies the side chain DRX. And if the Xth indication information indicates that the Yth domain does not exist or is invalid or can be ignored, the first terminal equipment determines a second terminal equipment which does not apply the side chain DRX and corresponds to the side chain authority, and sends PSCCH, PSSCH or SCI to the second terminal equipment which applies the side chain DRX and corresponds to the side chain authority by using the resource indicated by the side chain authority.

(2) The DCI comprises a Y-th field, wherein the Y-th field indicates the device identification information of the second terminal device corresponding to the side chain authority. If the second terminal equipment indicated by the Y domain is the second terminal equipment applying the side chain DRX, the first terminal equipment can use the resource indicated by the side chain authority to send the PSCCH, the PSSCH or the SCI to the second terminal equipment applying the side chain DRX corresponding to the side chain authority indicated by the Y domain. And if the second terminal equipment indicated by the Y domain is the second terminal equipment which does not apply the side chain DRX, the first terminal equipment determines the second terminal equipment which does not apply the side chain DRX and corresponds to the side chain authority, and sends PSCCH, PSSCH or SCI to the second terminal equipment which applies the side chain DRX and corresponds to the side chain authority by using the resource indicated by the side chain authority.

In the embodiment of the present application, the DCI including the X-th field or the Y-th field may use a first DCI format, and the DCI not including the X-th field and the Y-th field may use a second DCI format, for example, DCI format 3_ 0. And when the second terminal equipment in side chain communication with the first terminal equipment has the terminal equipment applying the side chain DRX, the first terminal equipment monitors or receives the first DCI format. And under the condition that no terminal equipment applying the side chain DRX exists in second terminal equipment in side chain communication with the first terminal equipment, the first terminal equipment monitors or receives the second DCI format. The first terminal device may send an indication of a certain second terminal device application sidechain DRX to the network device to enable the network device to determine the second terminal device applying sidechain DRX to communicate with the first terminal device sidechain.

And S403, the first terminal equipment transmits the PSCCH, the PSSCH or the SCI based on the side chain authority.

In some embodiments, if the first terminal device receives device identification information from the network device, where the device identification information is used to indicate a second terminal device corresponding to the side chain authority, the first terminal device may determine the second terminal device corresponding to the side chain authority based on the device identification information, and transmit PSCCH, pscsch, or SCI to the second terminal device corresponding to the side chain authority using a resource indicated by the side chain authority, where a time domain position of the resource indicated by the side chain authority is within a first time period, the first time period belongs to a side chain DRX activation time of the second terminal device, or the time domain position of the resource indicated by the side chain authority is within a side chain DRX activation time of the second terminal device, so that the second terminal device may receive PSCCH, or SCI within the side chain DRX activation time, to avoid that the time domain position of the resource indicated by the side chain authority is not within the DRX activation time of the second terminal device, the DRX mechanism between the first terminal device and the second terminal device cannot work or the sidelink resources are wasted.

In other embodiments, if the first terminal device does not receive the device identifier information from the network device, where the device identifier information is used to indicate a second terminal device corresponding to the side chain authority, the first terminal device may determine the second terminal device corresponding to the side chain authority by itself, and send PSCCH, pscsch, or SCI to the second terminal device corresponding to the side chain authority using the resource indicated by the side chain authority, where a time domain position of the resource indicated by the side chain authority is within a first time period, and the first time period includes the side chain DRX activation time of the second terminal device, or a time domain position of the resource indicated by the side chain authority includes the side chain DRX activation time of the second terminal device, so that the second terminal device may receive PSCCH, or SCI within the side chain DRX activation time, and avoid that the time domain position of the resource indicated by the side chain authority is not within the DRX activation time of the second terminal device, the DRX mechanism between the first terminal device and the second terminal device cannot work or the sidelink resources are wasted.

In order to implement reasonable control of the side chain DRX activation time, that is, to maintain or align the side chain DRX activation times of the network device, the terminal device at the transmitting end, and the terminal device at the receiving end, embodiments of the present application provide the following solutions of embodiment 2 and embodiment 3, and this embodiment 2 and embodiment 3 may be implemented by combining with the above embodiment 1, which is specifically described below.

Example 2

In this embodiment 2, the DRX activation time of the second terminal device may include the operation time of DRX-onDurationTimerPC5 and DRX-inactivityttimerpc 5, for example, at the start time of the DRX cycle, the second terminal device starts DRX-onDurationTimerPC5, that is, enters "On Duration", DRX-onDurationTimerPC5 starts to operate, that is, enters the sidechain DRX activation time, during DRX-onDurationTimerPC5 operation, the second terminal device starts or restarts DRX-inactivityttimerpc 5, the sidechain DRX activation time is extended, since DRX-inactivitytyppc 5 maintained by the second terminal device coincides with the state of DRX-inactivitytityperpc 35 5 maintained by the first terminal device and the network device, the first terminal device and the network device also start DRX-inactivity pc 2 operation or restart the first terminal device or the second terminal device 23, or the network device may restart the DRX apparatuses.

Illustratively, implicitly booting or restarting drx-inactivityttimerpc 5 may include at least one of:

the first terminal device may start or restart drx-inactivitytimertpc 5 after transmitting the PSCCH, psch, SCI, or MAC PDU, and the first terminal device may determine the time to start or restart drx-inactivitytimertpc 5 according to the time domain position of PSCCH, psch, SCI, or MAC PDU transmission, for example, start drx-inactivitytimertpc 5 at the first time slot or symbol after the PSCCH, psch, SCI, or MAC PDU transmission is finished. The SCI includes a second level SCI;

Or, the first terminal device may start or restart drx-InactivityTimerPC5 after receiving HARQ feedback information corresponding to PSCCH, psch, SCI, or MAC PDU transmission sent by the second terminal device, where the HARQ feedback information includes positive Acknowledgement (ACK) information or Negative Acknowledgement (NACK) information, and the first terminal device may determine a time to start or restart drx-InactivityTimerPC5 according to a time domain position of HARQ feedback transmission, for example, start drx-InactivityTimerPC5 at a first slot or symbol after HARQ feedback transmission ends. The SCI includes a second level SCI;

the second terminal device may start or restart drx-inactivityttimerpc 5 after receiving the PSCCH, psch, SCI, or MAC PDU transmitted by the first terminal device, and the second terminal device may determine the time to start or restart drx-inactivityttimerpc 5 according to the time domain position of PSCCH, psch, SCI, or MAC PDU transmission, for example, start drx-inactivityttimerpc 5 at the first time slot or symbol after receiving the PSCCH, psch, SCI, or MAC PDU;

or, the second terminal device may start or restart drx-inactivityttimerpc 5 after sending HARQ feedback information corresponding to PSCCH, psch, SCI, or MAC PDU transmission, where the HARQ feedback information includes ACK information or NACK information, and the second terminal device may determine a time to start or restart drx-inactivityttimerpc 5 according to a time domain position of HARQ feedback transmission, for example, start drx-inactivityttimerpc 5 at a first time slot or symbol after HARQ feedback transmission ends. The SCI includes a second level SCI;

The network device may start or restart drx-inactivityttimerpc 5 after sending the side chain permission to the first terminal device, where the side chain permission is used to indicate a resource for the first terminal device to send PSCCH, or SCI transmission, the resource indicated by the side chain permission may include at least one resource for side chain transmission, and the network device may determine, according to a time domain position of PSCCH, SCI, or MAC PDU transmission indicated by the side chain permission, a time to start or restart drx-inactivityttimerpc 5, such as start drx-inactivityttimerpc 5 in a first time slot or symbol after the time domain position of the PSCCH, SCI, or MAC PDU transmission resource indicated by the side chain permission ends.

Or, the drx-inactivitytimertcrpc 5 is started or restarted after the network device receives HARQ feedback information transmitted by PSCCH, psch, SCI, or MAC PDU corresponding to the side chain authority indication, where the HARQ feedback information includes ACK information or NACK information, and the network device may determine a time for starting or restarting drx-inactivityttimertcrpc 5 according to a time domain position of SL HARQ feedback transmission corresponding to PSCCH, SCI, or MAC PDU transmission, for example, drx-inactivitytimertropc 5 is started in a first time slot or symbol after the PSCCH, psch, SCI, or MAC PDU transmission ends corresponding to SL HARQ feedback transmission. The SCI includes a second level SCI.

Example 3

In this embodiment 3, the DRX activation time of the second terminal device may include the operation time of DRX-onDurationTimerPC5 and DRX-inactivityttimerpc 5, for example, at the start time of the DRX cycle, the second terminal device starts DRX-onDurationTimerPC5, i.e. enters "On Duration", DRX-onDurationTimerPC5 starts to operate, i.e. enters the sidelink timerpc activation time, during DRX-time Duration operation, the second terminal device starts or restarts DRX-InactivityTimerPC5, extending the sidelink DRX activation time, since DRX-inactivitytyprpc 5 maintained by the second terminal device coincides with the state of DRX-inactivitypervypc 5 maintained by the first terminal device and the network device, the first terminal device and the network device also start DRX-onduration at DRX timeout period 2 or restart at DRX timeout time of the terminal device 23, or restart at network device 23, or restart the second terminal device.

Illustratively, explicitly starting or restarting drx-InactivityTimerPC5 may include at least one of:

the first terminal device may send fourth indication information to the network device and the second terminal device, and the first terminal device starts or restarts the drx-inactivityttimerpc 5 after sending the fourth indication information, where the fourth indication information is used to indicate that drx-inactivityttimerpc 5 starts or restarts;

The network device and the second terminal device start or restart drx-inactivityttimerpc 5 after receiving fourth indication information sent by the first terminal device, where the fourth indication information is used to indicate drx-inactivityttimerpc 5 to start or restart.

It should be noted that, in this embodiment of the application, when the first terminal device sends the fourth indication information to the second terminal device, the fourth indication information may be included in the SCI, for example, one field (1-bit field) in the SCI is used to indicate that drx-inactivity timer pc5 is started or restarted, a value in the field is 1 to indicate that the terminal is started or restarted, and 0 to indicate that the terminal is not started, or the fourth indication information is transmitted through the PSSCH, that is, the PSSCH carries the fourth indication information.

In this embodiment, when the first terminal device sends the fourth indication information to the network device and the second terminal device, the fourth indication information may further have any one of the following functions:

(1) indicating that drx-InactivityTimerPC5 starts or restarts;

(2) a time slot or symbol indicating the start or restart time of drx-inactivityttimerpc 5, such as drx-inactivityttimerpc 5;

at the time slot indicating the start or restart time of drx-InactivityTimerPC5, the SFN or DFN in which the time slot is located and the index within the System Frame Number (SFN) or Direct Frame Number (DFN) in which the time slot is located may be indicated, or, the subframe in which the slot is located and the index of the slot within the subframe, or, the index of the slot, such as an index indicating a time slot on the sidelink or an index of a time slot within the sidelink resource pool, in indicating the symbol of the start or restart time of the drx-inactivity timerpc5, the index of the symbol within the subframe or slot may be indicated and the subframe or slot may be indicated, when the subframe is indicated, the SFN or DFN where the subframe is located and the index in the SFN or DFN where the subframe is located can be indicated, or, an index indicating a subframe, such as an index indicating a subframe on a sidelink or an index indicating a subframe within a sidelink resource pool;

(3) A time slot or symbol indicating the timeout time of drx-inactivyttimerpc 5, such as drx-inactivyttimerpc 5;

when a time slot of the timeout time of the drx-InactivityTimerPC5 is indicated, the SFN or DFN where the time slot is located and the index within the SFN or DFN where the time slot is located may be indicated, or the subframe where the time slot is located and the index within the subframe may be indicated, or the index of the time slot may be indicated, such as the index of the time slot on the sidelink or the index of the time slot within the sidelink resource pool, when a symbol of the timeout time of the drx-InactivityTimerPC5 is indicated, the index of the symbol within the subframe or the time slot may be indicated, and the subframe or the time slot may be indicated, when a subframe is indicated, the SFN or DFN where the subframe is located and the index within the SFN or DFN where the subframe is located may be indicated, or the index of the subframe may be indicated, such as the index of the subframe on the sidelink or the index of the subframe within the sidelink resource pool;

(4) a time slot or symbol indicating an end time of the side chain DRX activation time, such as an end time of the side chain DRX activation time;

when indicating a time slot of the end time of the side chain DRX activation time, the SFN or DFN in which the time slot is located and the index within the SFN or DFN in which the time slot is located may be indicated, or the subframe in which the time slot is located and the index within the subframe may be indicated, or the index of the time slot may be indicated, such as the index indicating the time slot on the side link or the index of the time slot within the side link resource pool, when indicating a symbol of the end time of the side chain DRX activation time, the index indicating the symbol within the subframe or the time slot may be indicated, when indicating a subframe, the SFN or DFN in which the subframe is located and the index within the SFN or DFN in which the subframe is located may be indicated, or the index indicating the subframe, such as the index indicating the subframe on the side link or the index of the subframe within the side link resource pool.

It should be noted that, in this embodiment of the application, when the first terminal device sends the fourth indication message to the network device, the fourth indication information may further have any one of the following functions:

(1) indicating the time domain position of the resource indicated by the side chain authority, wherein the side chain authority is the side chain authority corresponding to the starting or restarting time of the drx-InactivityTimerPC 5;

(2) indicating a time domain position of Downlink Control Information (DCI), where the DCI is used for scheduling or includes a side chain right corresponding to a start or restart time of drx-inactivity timer pc 5.

Optionally, when DRX-InactivityTimerPC5 is started or restarted, or after DRX-InactivityTimerPC5 is started or restarted, or the timeout time of DRX-InactivityTimerPC5, or the end time of the side-chain DRX activation time of the second terminal device triggers the first terminal device to send the fourth indication information to the network device and the second terminal device.

Optionally, when the first terminal device sends the fourth indication information to the network device, the fourth indication information may further indicate a second terminal device or destination corresponding to DRX-inactivity timer pc5, or a second terminal device or destination corresponding to a side chain DRX activation time.

In the foregoing embodiment 1, embodiment 2, and embodiment 3, the second terminal device may start or restart DRX-InactivityTimerPC5, DRX-HARQ-RTT-TimerPC5, or DRX-retransmission TimerPC5 corresponding to the side chain DRX of the second terminal device according to the information included in the received SCI.

Illustratively, the information contained in the SCI may be a source layer-1ID and a destination layer-1 ID. If the second terminal device receives an SCI (including a second-level SCI) for scheduling sidelink retransmission, and the source layer-1ID included in the SCI is the same as the layer-1ID of the first terminal device, and the destination layer-1ID included in the SCI is the same as the layer-1ID of the second terminal device, the second terminal device starts or restarts a DRX-InactivityTimePC 5, a DRX-HARQ-RTT-TimePC 5, or a DRX-retransmission TimerPC5 corresponding to a side chain DRX between the first terminal device and the second terminal device. Wherein, the source layer-1ID contained in the SCI is the same as the layer-1ID of the first terminal device, and it can also be understood that the source layer-1ID contained in the SCI is the same as the 8LSB of the layer-2ID of the first terminal device. The destination layer-1ID included in the SCI is the same as the layer-1ID of the second terminal device, and it can be understood that the destination layer-1ID included in the SCI is the same as 8LSB of the layer-2ID of the second terminal device.

Alternatively, the information contained in the SCI may be a source layer-1ID, a destination layer-1ID, and a communication type (cast type) indicating whether the sidelink communication is a unicast communication, a multicast communication, or a broadcast communication. If the second terminal device receives an SCI (including a second-level SCI) for scheduling sidelink retransmission, and a cast type included in the SCI indicates that the sidelink communication is unicast communication, a source layer-1ID included in the SCI is the same as a layer-1ID of the first terminal device, and a destination layer-1ID included in the SCI is the same as a layer-1ID of the second terminal device, the second terminal device starts or restarts a DRX-InactivityTimerPC5, a DRX-HARQ-RTT-TimerPC5, or a DRX-retroTimentionPC 5 corresponding to a side-chain DRX between the first terminal device and the second terminal device.

Alternatively, the information contained in the SCI may be destination layer-1ID and cast type. If the second terminal device receives an SCI (including a second-level SCI) for scheduling sidelink retransmission, and a cast type included in the SCI indicates that sidelink communication is multicast communication, and a destination layer-1ID included in the SCI is the same as a destination layer-1ID corresponding to the sidelink multicast communication, the second terminal device starts or restarts a DRX-inactivityttimerpc 5, a DRX-HARQ-RTT-TimerPC5, or a DRX-retransmission TimerPC5 corresponding to a side chain DRX of the multicast communication.

It should be noted that, in this embodiment of the application, the layer-1ID of the terminal device may be a source layer-1ID when the terminal device is used as a sending end, or a destination layer-1ID when the terminal device is used as a receiving end, and the layer-2ID of the terminal device may be a source layer-2ID when the terminal device is used as a sending end, or a destination layer-2ID when the terminal device is used as a receiving end.

It should be noted that, in this embodiment of the present application, the second terminal device may determine, according to information included in the received SCI, that the SCI is sent by the first terminal device to the second terminal device, or determine that a PSCCH, or a MAC PDU corresponding to the SCI is sent by the first terminal device to the second terminal device.

It should be noted that, in this embodiment of the present application, when the second terminal device performs sidelink communication with the plurality of first terminal devices, and layer-1 IDs corresponding to the plurality of first terminal devices are the same, and the second terminal device uses the layer-1 IDs in the sidelink communication with each of the plurality of first terminal devices, if the source layer-1ID included in the time received by the second terminal device is the same as the layer-1 IDs of the plurality of first terminal devices, and the destination layer-1ID included in the time received by the second terminal device is the same as the layer-1ID of the second terminal device, the second terminal device starts or restarts DRX sidechains corresponding to the second terminal device and a certain first terminal device, and the second terminal device determines that the second terminal device cannot perform sidelink communication with the certain second terminal device, the second terminal device determines that the first terminal device cannot perform sidelink communication with the certain second terminal device Which of the plurality of first terminal devices of the message.

The embodiment of the present application can solve the above problem in two ways, and the following specific examples are combined to respectively describe the specific implementation of the two ways in detail:

in a first manner, the second terminal device may respectively start or restart DRX-InactivityTimerPC5, DRX-HARQ-RTT-TimerPC5, or DRX-retransmission TimerPC5 corresponding to the side chain DRX between the second terminal device and each of the plurality of first terminal devices.

Optionally, if the second terminal device receives an SCI (including the second-level SCI) for scheduling sidelink newtransmission, the second terminal device will not stop drx-retransmission TimerPC5, and will restart drx-retransmission TimerPC5 when drx-HARQ-RTT-TimerPC5 times out and drx-retransmission TimerPC5 is running.

In a second mode, the second terminal device may start or restart a DRX-inactivity timer pc5 corresponding to a side chain DRX between the second terminal device and one of the plurality of first terminal devices, where a duration of the DRX-inactivity timer pc5 is a maximum value of DRX-inactivity timer pcs 5 corresponding to the side chain DRX between the second terminal device and the plurality of first terminal devices;

or the second terminal device may start or restart a DRX-HARQ-RTT-TimerPC5 corresponding to a side chain DRX between the second terminal device and one of the plurality of first terminal devices, where a duration of the DRX-HARQ-RTT-TimerPC5 is a minimum value of DRX-InactivityTimerPC5 corresponding to the side chain DRX between the second terminal device and the plurality of first terminal devices;

Or, the second terminal device may start or restart a DRX-retransmission timerpc5 corresponding to the side chain DRX between the second terminal device and one of the plurality of first terminal devices, where a duration of the DRX-retransmission timerpc5 is a maximum value of DRX-inactivity timerpc5 corresponding to the side chain DRX between the second terminal device and the plurality of first terminal devices.

It should be noted that, in this embodiment, when the source layer-1ID and the destination layer-1ID of multiple sidelink unicast communications are the same, an SCI transmitted between a terminal device (e.g., a first terminal device) at a transmitting end and a terminal device (e.g., a second terminal device) at a receiving end in any sidelink unicast communication may cause a terminal device at the receiving end in other sidelink unicast communications to mistakenly start or restart a DRX-inactivity timer pc5, a DRX-HARQ-RTT-timer pc5, or a DRX-retransmission timer pc5 corresponding to a sidelink DRX between the terminal device at the corresponding transmitting end and the terminal device at the receiving end, so that a DRX activation time of the terminal device at the receiving end maintained by the terminal device at the transmitting end in other sidelink unicast communications is different from a DRX sidelink activation time of the terminal device at the receiving end maintained by the terminal device at the receiving end, resulting in wasted power consumption at the receiving end or failure of the receiving end to receive the sidelink transmission from the transmitting end.

The embodiment of the present application can solve the above problem in four ways, and the following specific implementation of the four ways is described in detail with reference to specific examples:

in a first mode, if a second terminal device receives an SCI (including a second-level SCI) for scheduling sidelink unicast communication, and a destination layer-1ID included in the SCI is the same as a layer-1ID of the second terminal device in an sidelink unicast communication, and a source layer-1ID included in the SCI is the same as a layer-1ID of a first terminal device corresponding to the second terminal device in the sidelink unicast communication, the second terminal device may determine, by decoding a MAC PDU corresponding to the SCI, whether a source layer-2ID of the MAC PDU is the same as a layer-2ID of a first terminal device corresponding to the second terminal device in the sidelink unicast communication, or whether a destination layer-2ID of the MAC PDU is the same as a layer-2ID of the second terminal device in the sidelink unicast communication, if not, the second terminal device may cancel the startup or restart of the drx-InactivityTimerPC5, drx-HARQ-RTT-TimerPC5, or drx-RetransmissionTimerPC5 corresponding to the sidelink unicast communication before (i.e., determining that it is not the same, and not yet starting or restarting drx-InactivityTimerPC5, drx-HARQ-RTT-TimerPC5, or drx-RetransmissionTimerPC5 corresponding to the sidelink unicast communication) or after (i.e., determining that it is the same, and starting or restarting drx-InactivityTimerPC5, drx-HARQ-RTT-5, or drx-retransmissionrpc 5 corresponding to the sidelink unicast communication), cancel the startup or restart of drx-inactivitytityppc 5, drx-RTT-5, or drx-retranssionrpc 5 corresponding to the sidelink unicast communication, that is, the second terminal device does not start or restart the drx-InactivityTimerPC5, drx-HARQ-RTT-TimerPC5, or drx-retransmission TimerPC5 corresponding to the sidelink unicast communication according to the SCI.

In the second mode, if the second terminal device uses, is configured with or activates the side chain DRX, it is satisfied that the layer-1 IDs corresponding to the layer-2 IDs used or allocated by the second terminal device in different sidelink unicast communications performed between the second terminal device and the plurality of first terminal devices are different.

For example, the second terminal device may use or allocate the layer-2ID during the PC5 unicast link establishment with the first terminal device, for example, the second terminal device may use or allocate the layer-2ID before or during the PC5 unicast link establishment request message transmission, or the second terminal device may use or allocate the layer-2ID after receiving the PC5 unicast link establishment request message transmission from the first terminal device, and make the layer-1ID corresponding to the layer-2ID different from the layer-1ID corresponding to the layer-2ID used or allocated by the second terminal device in other sidelink unicast communication.

It should be understood that, in this embodiment of the application, after the second terminal device establishes the PC5 unicast link with the first terminal device, the second terminal device may further update the layer-2ID, and send the updated layer-2ID to the first terminal device in the PC5 unicast link identification update process, so that the layer-1ID corresponding to the updated layer-2ID is different from the layer-1ID corresponding to the layer-2ID used or allocated by the second terminal device in other sidelink unicast communication.

And if the second terminal device uses, is configured with or activates the side chain DRX, the layer-1ID corresponding to the layer-2ID used or allocated by the second terminal device in any sidelink unicast communication is different from the layer-1ID corresponding to the layer-2ID in other sidelink unicast communication, wherein the second terminal device is not the terminal device in other sidelink unicast communication.

It should be noted that, in this embodiment of the application, the second terminal device may obtain a source layer-1ID and a destination layer-1ID in other sidelink unicast communications according to an SCI transmitted in the other sidelink unicast communications, and decode a MAC PDU corresponding to the SCI, so as to obtain a source layer-2ID and a destination layer-2ID in the other sidelink unicast communications, and may determine that the second terminal device is not a terminal device in the other sidelink unicast communications according to the source layer-2ID and the destination layer-2ID in the other sidelink unicast communications.

For example, the second terminal device may use or allocate the layer-2ID during the process of establishing the PC5 unicast link with the first terminal device, for example, the second terminal device uses or allocates the layer-2ID before or when sending the PC5 unicast link establishment request message, or the second terminal device uses or allocates the layer-2ID after receiving the PC5 unicast link establishment request message sent by the first terminal device, so that the layer-1ID corresponding to the layer-2ID is different from the layer-1 IDs corresponding to the layer-2 IDs in other sidelink unicast communications.

It should be understood that, in this embodiment of the application, after the second terminal device establishes the PC5 unicast link with the first terminal device, the second terminal device may further update the layer-2ID, and send the updated layer-2ID to the first terminal device in the PC5 unicast link identification update process, so that the layer-1ID corresponding to the layer-2ID is different from the layer-1 IDs corresponding to the layer-2 IDs in other sidelink unicast communications.

In a fourth mode, the second terminal device may start or restart a DRX-inactivityttimerpc 5, a DRX-HARQ-RTT-TimerPC5, or a DRX-retransmission TimerPC5 corresponding to the side chain DRX of the second terminal device according to the destination layer-2ID and source layer-2ID corresponding to the received sidelink transmission.

Illustratively, if a second terminal device receives an sidelink transmission, and the source layer-2ID corresponding to the sidelink transmission is the same as the layer-2ID of the first terminal device, and the destination layer-2ID corresponding to the SL transmission is the same as the layer-2ID of the second terminal device, the second terminal device starts or restarts a DRX-InactivityTimerPC5, a DRX-HARQ-RTT-TimerPC5, or a DRX-retransmission TimerPC5 corresponding to a side chain DRX between the first terminal device.

It should be understood that, in the embodiment of the present application, if the sidelink transmission is a new transmission, the second terminal device only starts or restarts the DRX-inactivityttimerpc 5 corresponding to the sidelink DRX between the first terminal device, and if the sidelink transmission is a retransmission, the second terminal device only starts or restarts the DRX-inactivityttimerpc 5, DRX-HARQ-RTT-TimerPC5, or DRX-retransmission TimerPC5 corresponding to the sidelink DRX between the first terminal device.

If the second terminal device receives a newly transmitted SCI (including a second-level SCI) of the scheduling sidelink, and the source layer-1ID included in the SCI is the same as the source layer-1ID of the first terminal device, and the destination layer-1ID included in the SCI is the same as the layer-1ID of the second terminal device, the second terminal device starts or restarts a DRX-inactivity timer pc5, a DRX-HARQ-RTT-timer pc5, or a DRX-retransmission timer pc5 corresponding to a side-chain DRX between the second terminal device and the first terminal device when failing to correctly decode the MAC PDU corresponding to the SCI.

If the first terminal device sends an SCI to the second terminal device and receives a negative acknowledgement (negative acknowledgement) from the second terminal device for the SCI, the first terminal device does not start or restart DRX-inactivityttimerpc 5, DRX-HARQ-RTT-TimerPC5, or DRX-retransmission TimerPC5 corresponding to a side-chain DRX between the first terminal device and the second terminal device according to the SCI.

It should be noted that, in this embodiment of the present application, if the second terminal device receives an SCI indicating sidelink retransmission from the first terminal device, or receives fourth indication information, the second terminal device may start or restart drx-inactivityttimerpc 5, however, if the MAC PDU corresponding to the SCI or the fourth indication information only includes non-data information, for example, only includes non-data information such as sidelink resource information in SL-CSI reporting or inter-terminal device cooperation, and does not include data information such as STCH data or SCCH data, the second terminal device unnecessarily increases a sidelink activation time, thereby increasing power consumption of the second terminal device.

in the first mode, if the first terminal device sends an SCI indicating sidelink retransmission to the second terminal device, and the MAC PDU corresponding to the SCI includes the first information but does not include the second information, the second terminal device does not start or restart the drx-InactivityTimerPC 5.

Illustratively, the second terminal device starts or restarts drx-inactivitytimertpc 5 after receiving the SCI indicating sidelink retransmission sent by the first terminal device, and if the second terminal device decodes that the MAC PDU corresponding to the SCI includes the first information but does not include the second information, then starts or restarts drx-inactivitytimertpc 5) before or after starting or restarting the drx-inactivitytimertpc 5 according to the SCI (i.e., when the MAC PDU corresponding to the SCI includes the first information but does not include the second information, starts or restarts the drx-inactivitytitytityppc 5), cancels or restarts the drx-inactivityppc 5, i.e., maintains the state of the MAC PDU corresponding to the SCI before receiving the SCI is changed, or the state of the drx-inactivityptc 35 5 is changed to cause the SCI-inactivityptc 5 to change.

For example, the first terminal device may include, in an SCI indicating sidelink retransmission sent to the second terminal device, information for indicating that a MAC PDU corresponding to the SCI includes first information but not second information, or include information for indicating that a MAC PDU corresponding to the SCI includes second information, and after receiving the SCI indicating sidelink retransmission sent by the first terminal device, if the second terminal device determines that the MAC PDU corresponding to the SCI includes the first information but not the second information according to the SCI, the second terminal device does not start or restart drx-inactivityttimerpc 5 after receiving the SCI; if the second terminal device determines that the MAC PDU corresponding to the SCI includes the second information according to the SCI, the second terminal device starts or restarts the drx-inactivityttimerpc 5 after receiving the SCI.

For example, the first terminal device may send the fourth indication information to the second terminal device, or the first terminal device may send information indicating not to start or not to restart drx-inactivityttimerpc 5 to the second terminal device, where the fourth indication information and the information indicating not to start or not to restart drx-inactivityttimerpc 5 may be included in the SCI or the MAC CE, and if the second terminal device determines that the SCI or the MAC CE includes the information indicating not to start or not to restart drx-InactivityTimerPC5, the second terminal device determines that the MAC PDU corresponding to the SCI or the MAC CE includes the first information but not the second information, and the second terminal device does not start or not restart drx-inactivityttimerpc 5 after receiving the SCI or the MAC CE; if the second terminal device determines that the SCI or the MAC CE includes the fourth indication information, the second terminal device determines that the MAC PDU corresponding to the SCI or the MAC CE includes the second information, and the second terminal device starts or restarts the drx-inactivityttimerpc 5 after receiving the SCI or the MAC CE.

In a second mode, if the first terminal device sends an SCI indicating sidelink retransmission to the second terminal device, and the MAC PDU corresponding to the SCI includes the first information but not the second information, the second terminal device starts a first timer, and the second terminal device monitors the PSCCH, the psch, or the SCI during the operation of the first timer, wherein the duration of the first timer is less than the duration of drx-inactivity timer pc 5.

It should be noted that, in the embodiment of the present application, the first information may be one or more of the following: SL-CSI reporting, side link resource information in cooperation between terminal devices; the second information includes one or more of: data of SCCH, data of STCH, MAC CE except for first information. Alternatively, the first information may be one or more of: SL-CSI reporting, sidelink resource information in cooperation between terminal devices, data of SCCH, information other than data of STCH; the second information may be data of the STCH.

It should be noted that, in this embodiment of the present application, the two manners described above may be extended to DRX transmitted by a Uu interface between a second terminal device and a base station, and if a first terminal device is replaced with the base station, an SCI is replaced with DCI, and an SCI indicating a sidelink new transmission is replaced with DCI indicating a new transmission, the first information may be one or more of the following: data of a Broadcast Control Channel (BCCH), data of a Paging Control Channel (PCCH), data of a Common Control Channel (CCCH), data of a Dedicated Control Channel (DCCH); the second information may be data of a Dedicated Traffic Channel (DTCH).

The first terminal device in embodiment 1, embodiment 2, and embodiment 3 may discard the side chain permission sent by the network device when the side link transmission and the uplink transmission collide, where the side chain permission may be the side chain permission of the time domain position of the indicated resource in the first time period, or may not be the side chain permission of the time domain position of the indicated resource in the first time period, and this is not specifically limited in this embodiment of the application.

It should be noted that, in the embodiment of the present application, the discarded side chain authority may also be understood as an unused side chain authority, which means that the first terminal device does not transmit PSCCH, or SCI on the resource indicated by the side chain authority.

It should be noted that, in this embodiment of the present application, if a first terminal device discards or determines to discard a side link authority sent by a network device, the network device will start or restart DRX-inactivity timer pc5, and the first terminal device and a second terminal device do not start or restart DRX-inactivity timer pc5, so that DRX-inactivity timer pc5 maintained by the first terminal device and the second terminal device is inconsistent with the state of DRX-inactivity timer pc5 maintained by the network device, the time domain position of a resource indicated by a side link authority subsequently sent by the network device to the first terminal device may not be within a side link DRX activated time of the second terminal device, and if the first terminal device uses the resource indicated by the side link authority to send PSCCH, or SCI, since the second terminal device does not receive PSCCH, or PSCCH within the side link inactivated time, if the second terminal device receives PSCCH, PSCCH or SCI, it also receives PSCCH, PSCCH or SCI in the side chain DRX inactive time, which will cause the DRX mechanism to fail to work, and if the first terminal device does not use the resource indicated by the side chain authority to transmit PSCCH, PSCCH or SCI, it will cause the resource indicated by the side chain authority to be wasted, and in view of this, the DRX-InactivityTimerPC5 maintained by the first terminal device and the second terminal device can be made to be consistent with the DRX-InactivityTimerPC5 maintained by any one of the following methods:

(1) As shown in fig. 5e, if the first terminal device discards or determines to discard a side link right sent by the network device, the first terminal device triggers to send fifth indication information to the network device. The fifth indication information is used to indicate that the side chain DRX activation time of the second terminal device corresponding to the side chain permission has ended or is about to end, and it can be understood that the fifth indication information may also indicate that the first terminal device discards or determines to discard the side chain permission. The side chain DRX activation time may be a side chain DRX activation time between the first terminal device and the second terminal device corresponding to the side chain authority, and may be determined by the first terminal device, the second terminal device corresponding to the side chain authority, or the first terminal device and the second terminal device corresponding to the side chain authority. Discarding the sidechain authority does not result in a change in the sidechain DRX activation time or a DRX-inactivityttimerpc 5 start or restart.

It should be understood that, in this embodiment of the application, triggering, by the first terminal device, the indication information to be sent to the network device may be understood as triggering, by the first terminal device, the indication information to be sent, or triggering, by the first terminal device, the report of the indication information, which is not specifically limited in this embodiment of the application. After the first terminal equipment triggers to send the indication information to the network equipment, the first terminal equipment sends the indication information to the network equipment when the first terminal equipment has uplink transmission resources. For example, the first terminal device triggers the network device to send the fifth indication information, which may be understood as that the first terminal device triggers the network device to send the fifth indication information, or the first terminal device triggers the network device to report the fifth indication information, and after the first terminal device triggers the network device to send the fifth indication information, the first terminal device sends the fifth indication information to the network device when the first terminal device has uplink transmission resources.

Alternatively, in this embodiment of the present application, after determining to discard the side chain authority, either after discarding the side-chain right, or after the temporal location of the resource indicated by the side-chain right, or the end time of the time domain position of the first sidelink transmission indicated by the sidelink authority, or the first time slot or symbol after the time domain position of the first sidelink transmission included in the sidelink authority is ended, or after determining to discard the side chain authority, or after discarding the side chain authority, or at a time interval after the end of the time domain position of the first sidelink transmission included in the side chain authority, or the end time of the side chain DRX activation time or the time of a certain interval before the end time of the side chain DRX activation time triggers to send the fifth indication information to the network equipment, or sends the fifth indication information to the network equipment.

Optionally, in this embodiment of the present application, the first terminal device may determine the side-chain DRX activation time according to a time domain position of the transmitted PSCCH, psch, or SCI, or a DRX-onDurationTimerPC 5. For example, after the first terminal device transmits PSCCH, psch, SCI, or MAC PDU to the second terminal device before or after the sidechain permission is discarded, the first terminal device starts or restarts DRX-inactivity timer pc5, and then determines that the sidechain DRX activation time includes a running time of DRX-inactivity timer pc5, and the end time of the sidechain DRX activation time is later than or equal to the timeout time of DRX-inactivity timer pc 5. If the first terminal device does not send PSCCH, PSCCH or SCI to the second terminal device during the run of DRX-onDurationTimerPC5, the end time of the sidechain DRX activation time is the timeout time of DRX-onDurationTimerPC 5. The sidechain DRX activation time is a continuous period of time.

For example, as shown in fig. 5f, if the first terminal device uses the resource in the first sidelink authority to transmit PSCCH, psch, SCI, or MAC PDU to the second terminal device before discarding the second sidelink authority, the first terminal device starts or restarts DRX-inactivityttimerpc 5, determines that the sidelink activation time includes the running time of DRX-inactivityttimerpc 5, and the end time of the sidelink DRX activation time is equal to the timeout time of DRX-inactivityttimerpc 5;

or, as shown in fig. 5g, if the first terminal device uses the resource on the first sidelink authority to transmit PSCCH, SCI, or MAC PDU to the second terminal device before discarding the second sidelink authority, and the first terminal device uses the resource on the third sidelink authority to transmit PSCCH, SCI, or MAC PDU to the second terminal device after discarding the second sidelink authority, the first terminal device starts or restarts DRX-inactivity timerpc5, determines that the sidelink activation time includes the operation time of DRX-inactivity timerpc5, and the end time of the sidelink DRX activation time is later than the timeout time of DRX-inactivity timerpc 5;

alternatively, as shown in fig. 5h, if the first terminal device does not transmit PSCCH, or SCI to the second terminal device using the resources in the first sidelink authority during the operation of DRX-onDurationTimerPC5, it determines that the end time of the sidelink DRX activation time is the timeout time of DRX-onDurationTimerPC 5. Optionally, in this embodiment of the present application, when triggering to send the fifth indication information to the network device, the first terminal device may further trigger to send, to the network device, device identification information of the second terminal device corresponding to the determined discarded side chain permission, that is, device identification information of the second terminal device at the end of the side chain DRX activation time, where the device identification information may be a destination ID, such as a sl-destination identity, for identifying a destination of a sidelink communication, where the sl-destination identity may be a destination layer-2ID, or the device identification information may be a destination Index, such as a destination Index, for indicating that the first terminal device sends a destination information list or a sending resource request list to the network device, any IE in the destination information list or a destination corresponding to the entry, and the destination Index corresponds to an information element or a precedence order in the list, where the destination Index corresponds to an information element or precedence order in the list, such as a first entry or a first entry list corresponding to a destination 0, and destination index is 1 corresponding to the destination corresponding to the second IE in the list. Optionally, in this embodiment of the present application, if the first terminal device uses or determines to use another resource indicated by the side chain authority to transmit the PSCCH, or SCI after the time domain position of the resource indicated by the discarded side chain authority and before the end time or an interval before the end time of the side chain DRX activation time, the first terminal device may cancel triggering of transmitting the fifth indication information to the network device, that is, if the discarded side chain authority is followed by the last side chain authority used for transmitting the PSCCH, or SCI to the second terminal device, the first terminal device triggers transmission of the fifth indication information to the network device. The first terminal device may also cancel the device identity information of the second terminal device that triggered the sending of the side chain DRX activation time end to the network device.

It should be understood that, in this embodiment of the present application, the first terminal device cancels triggering to send the indication information to the network device, which may be understood as that the first terminal device cancels triggering to send the indication information, or that the first terminal device cancels triggering to report the indication information, or that the first terminal device cancels reporting of the triggering indication information, which is not specifically limited in this embodiment of the present application. For example, the first terminal device cancels and triggers the network device to send the fifth indication information, which may be understood as that the first terminal device cancels and triggers the network device to send the fifth indication information, or the first terminal device cancels and triggers the network device to report the fifth indication information.

Optionally, in this embodiment of the application, if the first terminal device uses the resource indicated by the other side chain authority to send the PSCCH, psch, or SCI before triggering to send the fifth indication information to the network device, or the first terminal device determines to send the PSCCH, psch, or SCI using the resource indicated by the other side chain authority, the first terminal device may cancel triggering to send the fifth indication information to the network device. The first terminal device may also cancel the device identity information of the second terminal device that triggered the sending of the side chain DRX activation time end to the network device.

Optionally, in this embodiment of the application, if the DRX-onDurationTimerPC5 of the second terminal device is started or running before triggering the fifth indication information to be sent to the network device, that is, the side chain DRX activation time of the next cycle starts, the first terminal device may cancel triggering the sending of the fifth indication information to the network device. The first terminal device may also cancel the device identity information of the second terminal device that triggered the sending of the side chain DRX activation time end to the network device.

For example, as shown in fig. 5i, if the first terminal device does not have uplink resources when sending the fifth indication information to the network device, the first terminal device does not send the fifth indication information during the operation of the second drx-onDurationTimerPC5, and cancels sending the fifth indication information when the drx-onDurationTimer PC5 is started or runs. Optionally, in this embodiment of the present application, if the first terminal device does not cause the change of the sidechain DRX activation time even if the first terminal device transmits the PSCCH, psch, or SCI to the second terminal device using the discarded sidechain permission, that is, the sidechain DRX activation time determined by the network device is consistent with the sidechain DRX activation time determined by the first terminal device, the first terminal device does not trigger to transmit the fifth indication information to the network device. If the first terminal device sends the PSCCH, psch, or SCI to the second terminal using the discarded side chain permission to cause the change of the side chain DRX activation time, that is, after the side chain permission is discarded, the side chain DRX activation time determined by the network device is inconsistent with the side chain DRX activation time determined by the first terminal device, the first terminal device sends fifth indication information to the network device. For example, after the first terminal device transmits PSCCH, psch, SCI, or MAC PDU to the second terminal device on the resource indicated by the first sidelink authority before the discarded sidelink authority, the end time of the first sidelink DRX activation time is determined according to the PSCCH, psch, SCI, or MAC PDU transmission. And if the first terminal equipment sends the PSCCH, the PSSCH, the SCI or the MAC PDU to the second terminal equipment on the resource indicated by the discarded side chain authority, determining the ending moment of the DRX activation time of the second side chain according to the transmission of the PSCCH, the PSSCH, the SCI or the MAC PDU. And if the ending time of the second side chain DRX activation time is equal to the ending time of the first side chain DRX activation time, the first terminal equipment does not trigger to send fifth indication information to the network equipment, and sends equipment identification information of the second terminal equipment corresponding to the side chain authority determined to be discarded to the network equipment. And if the end time of the second side chain DRX activation time is not equal to the end time of the first side chain DRX activation time, the first terminal equipment sends fifth indication information to the network equipment.

Illustratively, as shown in FIG. 5j, the time when the time domain position of the resource indicated by the first sidelink privilege plus the length of time of drx-InactivetyTimerPC 5 falls within the run time of drx-onDurationTimerPC5, the end time of the side chain DRX activation time corresponding to the time domain position of the resource indicated by the first side chain permission is the timeout time of DRX-onDurationTimerPC5, the time of the time domain position of the resource indicated by the discarded second side chain permission plus the time length of DRX-InactivityTimerPC5 falls within the DRX-onDurationTimerPC5 running period, the end time of the side chain DRX activation time corresponding to the time domain position of the resource indicated by the discarded second side chain permission is the timeout time of DRX-onDurationTimerPC5, the first terminal device does not trigger sending of the fifth indication information to the network device, and does not trigger sending of the device identification information of the second terminal device corresponding to the discarded second side link permission to the network device.

Optionally, in this embodiment of the present application, the fifth indication information may be included in the UCI, MAC CE, or RRC message, and it is understood that the device identification information of the second terminal device corresponding to the discarded side chain authority may also be included in the UCI, MAC CE, or RRC message, for example, a field in the MAC CE is used to indicate the first terminal device to determine to discard the side chain authority and the end of the side chain DRX activation time or the device identification information, or one or more bits in the MAC CE are used to indicate the first terminal device to determine to discard the side chain authority and the end of the side chain DRX activation time or the device identification information, or a PUCCH or an uplink shared channel (PUSCH) or a Physical Random Access Channel (PRACH) is used to indicate the first terminal device to determine the side chain and the end of the side chain DRX activation time or the device identification information, the PRACH resource may be defined, where the PRACH resource is used to indicate that the first terminal device determines to discard the sidechain permission and end of the sidechain DRX activation time or the device identification information.

(2) If the first terminal device discards or determines to discard a certain side link permission sent by the network device, the first terminal device may trigger to send sixth indication information to the network device, where the sixth indication information is used to indicate that drx-InactivityTimerPC5 corresponding to the side link permission times out or is about to time out. It is to be understood that the sixth indication information may also indicate that the first terminal device discards or discards the side chain right.

Alternatively, in this embodiment of the present application, after determining to discard the side chain authority, either after discarding the side-chain right, or after the temporal location of the resource indicated by the side-chain right, or the end time of the time domain position of the first sidelink transmission indicated by the sidelink authority, or the first time slot or symbol after the time domain position of the first sidelink transmission included in the sidelink authority is ended, or after determining to discard the side chain authority, or after discarding the side chain authority, or at a time interval after the end of the time domain position of the first sidelink transmission included in the side chain authority, or the drx-inactivityttimerpc 5 timeout time of the second terminal device, or drx-InactivityTimerPC5 is triggered to send the sixth indication information to the network device at a time interval before the timeout time, or the sixth indication information is sent to the network device.

Optionally, in this embodiment of the present application, the first terminal device may determine the drx-inactivityttimerpc 5 operation time or the timeout time according to the time domain position of the transmitted PSCCH, psch, or SCI. For example, before the discarded side chain authority, after the first terminal device sends PSCCH, psch, SCI, or MAC PDU to the second terminal device, the first terminal device starts or restarts drx-inactivityttimerpc 5, and according to the duration of drx-inactivityttimerpc 5, the operation time or timeout time of drx-inactivityttimerpc 5 may be determined.

Optionally, in this embodiment of the present application, when the first terminal device sends the sixth indication information to the network device, the first terminal device may further send, to the network device, device identification information of the second terminal device corresponding to the determined discarded side chain permission, that is, device identification information of the second terminal device at the end of the side chain DRX activation time, where the device identification information may be a destination ID, such as a sl-destination identity, used to identify a destination of a side link communication, where the sl-destination identity may be a destination layer-2ID, or the device identification information may be a destination Index, such as a destination Index, used to indicate that the first terminal device sends either one of a destination information list or a sending resource request list to the network device or a destination corresponding to the entry, and the destination Index corresponds to an information element or a sequence of IEs corresponding to the destination in the list, where the destination Index corresponds to the first terminal device or the first terminal device corresponds to a first IE or a first IE in the destination information list, where the destination Index corresponds to a first IE or a first IE in the destination Index 0, and the destination index is 1 corresponding to the second IE or destination corresponding to the entry in the list.

Optionally, in this embodiment of the present application, if the first terminal device uses or determines to use another resource indicated by the side chain authority to send the PSCCH, or SCI after the time domain position of the resource indicated by the discarded side chain authority and before the DRX-inactivity timer pc5 timeout time or a time interval before the timeout time, the first terminal device cancels sending the sixth indication information to the network device, and sends the device identification information of the second terminal device with the end of the side chain DRX activation time to the network device. That is, if the discarded side chain permission is followed by the last side chain permission during the drx-inactivityttimerpc 5 operation for transmitting the PSCCH, or SCI to the second terminal device, the first terminal device transmits the sixth indication information to the network device or triggers the transmission of the sixth indication information to the network device.

Optionally, in this embodiment of the application, if DRX-onDurationTimerPC5 of the second terminal device is started or operated before the sixth indication information is sent to the network device, that is, the next cycle of the side chain DRX activation time starts, the first terminal device cancels sending the sixth indication information to the network device, and sends the device identifier information of the second terminal device corresponding to the discarded side chain permission to the network device.

Optionally, in this embodiment of the present application, if the first terminal device does not cause the change of the sidechain DRX activation time even if the first terminal device transmits the PSCCH, psch, or SCI to the second terminal device using the discarded sidechain permission, that is, the sidechain DRX activation time determined by the network device is consistent with the sidechain DRX activation time determined by the first terminal device, the first terminal device does not transmit the sixth indication information to the network device. For example, after the first terminal device transmits PSCCH, psch, SCI, or MAC PDU to the second terminal device on the resource indicated by the first sidelink authority before the discarded sidelink authority, the end time of the first sidelink DRX activation time is determined according to the PSCCH, psch, SCI, or MAC PDU transmission. And if the first terminal equipment sends the PSCCH, the PSSCH, the SCI or the MAC PDU to the second terminal equipment on the resource indicated by the discarded side chain authority, determining the ending moment of the DRX activation time of the second side chain according to the transmission of the PSCCH, the PSSCH, the SCI or the MAC PDU. If the end time of the second sidelink DRX activation time is equal to the end time of the first sidelink DRX activation time, the first terminal device does not send the sixth indication information to the network device, and sends device identification information of the second terminal device corresponding to the discarded sidelink authority to the network device, for example, if the time of the time domain position of the resource indicated by the first sidelink authority plus the time length of DRX-InactivityTimerPC5 falls within the timeperiod of timeperiod-onDurationTimerPC 5, the end time of the sidelink DRX activation time corresponding to the time domain position of the resource indicated by the first sidelink authority is the timeout time of DRX-onDurationTimerPC5, and the time of the time domain position of the resource indicated by the discarded sidelink authority plus the time length of DRX-inactivityprpc 5 falls within the timeperiod-ondurationrpc 5, then the end time of the sidelink activation time corresponding to the time domain position of the discarded sidelink indicated by the sidelink is the timeout time of DRX-ondurationrpc 5, the first terminal device does not send the sixth indication information to the network device, and sends the device identification information of the second terminal device corresponding to the determined discarded side chain permission to the network device.

(3) As shown in fig. 5k, if the first terminal device discards or determines to discard a side chain right sent by the network device, it triggers to send seventh indication information to the network device, where the seventh indication information is used to indicate an end time of the side chain DRX activation time of the second terminal device. It is to be understood that the seventh indication may also indicate that the first terminal device discards or discards the side chain right. The side chain DRX activation time may be a side chain DRX activation time between the first terminal device and the second terminal device corresponding to the side chain authority, and may be determined by the first terminal device, the second terminal device corresponding to the side chain authority, or the first terminal device and the second terminal device corresponding to the side chain authority. Discarding the sidechain authority does not result in a change in the sidechain DRX activation time or a DRX-inactivityttimerpc 5 start or restart.

Optionally, in this embodiment of the application, when the first terminal device triggers sending of the seventh indication information to the network device, the first terminal device may further trigger sending of device identification information of the second terminal device corresponding to the side chain authority that is determined to be discarded, to the network device, that is, the device identification information of the second terminal device at the end of the side chain DRX activation time.

Optionally, in this embodiment of the application, after determining to discard the side chain authority, or discard the time domain position of the resource indicated by the side chain authority, or the end time of the time domain position of the first sidelink transmission indicated by the side chain authority, or the first time slot or symbol after the end of the time domain position of the first sidelink transmission included in the side chain authority, or after determining to discard the side chain authority, or the time of a segment of interval after the end of the time domain position of the first sidelink transmission included in the side chain authority, or the time of a segment of interval before the end of the DRX activation time of the side chain, the first terminal device may trigger to send the seventh indication information to the network device, or send the seventh indication information to the network device.

Optionally, in this embodiment of the application, if the first terminal device determines to discard the side chain right or discard the side chain right, and the first terminal device triggers to send a BSR to the network device, it may trigger to send the seventh indication information to the network device and determine the device identification information of the second terminal device corresponding to the discarded side chain right.

In the embodiment of the present application, the first terminal device may determine the sidechain DRX activation time according to the time domain position of the transmitted PSCCH, psch, or SCI, or the DRX-onDurationTimerPC 5. For example, before or after the discarded sidechain authority, after the first terminal device transmits PSCCH, psch, SCI, or MAC PDU to the second terminal device, the first terminal device starts or restarts DRX-inactivityttimerpc 5, the sidechain DRX activation time includes DRX-InactivityTimerPC5 running time, and the end time of the sidechain DRX activation time is later than or equal to DRX-inactivityttimerpc 5 timeout time. If the first terminal device does not send PSCCH, PSCCH or SCI to the second terminal device during the DRX-onDurationTimerPC5 operation, the end time of the sidechain DRX activation time is the timeout time of the DRX-onDurationTimerPC 5. The side chain DRX activation time here is a continuous period of time.

Optionally, in this embodiment of the present application, if the first terminal device uses or determines to use another resource indicated by the side chain authority to transmit PSCCH, or SCI after the time domain position of the resource indicated by the discarded side chain authority and before the end time or an interval before the end time of the side chain DRX activation time, the first terminal device cancels the transmission of the seventh indication information to the network device, and transmits the device identification information of the second terminal device at the end of the side chain DRX activation time to the network device. That is, if the discarded side chain permission is followed by the last side chain permission within the side chain DRX activation time for transmitting the PSCCH, psch or SCI to the second terminal device, the first terminal device transmits the seventh indication information to the network device or triggers the transmission of the seventh indication information to the network device.

Optionally, if the first terminal device uses the resource indicated by another side chain authority to send PSCCH, psch, or SCI after the time domain position of the resource indicated by the discarded side chain authority and before triggering to send the seventh indication information to the network device and determining the device identification information of the second terminal device corresponding to the discarded side chain authority, the first terminal device may cancel triggering to send the seventh indication information to the network device. The first terminal device may also cancel triggering of sending the device identification information of the second terminal device corresponding to the discarded side chain authority to the network device.

Optionally, if the first terminal device uses the resource indicated by the other side chain authority to send the PSCCH, psch, or SCI before triggering to send the seventh indication information to the network device to determine the device identification information of the second terminal device corresponding to the discarded side chain authority, or the first terminal device determines to use the resource indicated by the other side chain authority to send the PSCCH, psch, or SCI, the first terminal device may cancel triggering to send the seventh indication information to the network device. The first terminal device may also cancel triggering of sending the device identification information of the second terminal device corresponding to the discarded side chain authority to the network device.

Optionally, in this embodiment of the application, if the DRX-onDurationTimerPC5 of the second terminal device is started or running before triggering to send the seventh indication information to the network device, that is, the side chain DRX activation time of the next cycle starts, the first terminal device may cancel triggering to send the seventh indication information to the network device. The first terminal device may also cancel triggering of sending the device identification information of the second terminal device corresponding to the discarded side chain authority to the network device.

Optionally, in this embodiment of the present application, if the first terminal device does not cause the change of the sidechain DRX activation time even if the first terminal device transmits the PSCCH, psch, or SCI to the second terminal device using the discarded sidechain permission, that is, the sidechain DRX activation time determined by the network device is consistent with the sidechain DRX activation time determined by the first terminal device, the first terminal device does not transmit the seventh indication information to the network device. If the first terminal device sends the PSCCH, psch, or SCI to the second terminal using the discarded side chain permission to cause the change of the side chain DRX activation time, that is, after the side chain permission is discarded, the side chain DRX activation time determined by the network device is inconsistent with the side chain DRX activation time determined by the first terminal device, the first terminal device sends seventh indication information to the network device. For example, after the first terminal device transmits PSCCH, psch, SCI, or MAC PDU to the second terminal device on the resource indicated by the first sidelink authority before the discarded sidelink authority, the end time of the first sidelink DRX activation time is determined according to the PSCCH, psch, SCI, or MAC PDU transmission. And if the first terminal equipment sends the PSCCH, the PSSCH, the SCI or the MAC PDU to the second terminal equipment on the resource indicated by the discarded side chain authority, determining the ending moment of the DRX activation time of the second side chain according to the transmission of the PSCCH, the PSSCH, the SCI or the MAC PDU. And if the ending time of the second side chain DRX activation time is equal to the ending time of the first side chain DRX activation time, the first terminal equipment does not trigger to send the seventh indication information to the network equipment and does not trigger to send the equipment identification information of the second terminal equipment corresponding to the side chain authority determined to be discarded to the network equipment.

Optionally, in this embodiment of the present application, when the first terminal device indicates the end time of the sidechain DRX activation time to the network device, the last slot or symbol before the end time of the side chain DRX activation time may be indicated, alternatively, the first slot or symbol after the end time of the side chain DRX activation time may be indicated, wherein, upon indicating a first slot after an end time of the sidechain DRX activation time, the SFN or DFN in which the slot is located and the index within the SFN or DFN in which the slot is located may be indicated, or, the subframe in which the slot is located and the index of the slot within the subframe, or, the index of the slot, such as an index indicating a time slot on the sidelink or an index of a time slot within the sidelink resource pool, when the first symbol after the end time of the side chain DRX activation time is indicated, the index of the symbol within the subframe or slot may be indicated and the subframe or slot may be indicated. When indicating the subframe, the SFN or DFN in which the subframe is located and the index within the SFN or DFN in which the subframe is located may be indicated, or the index of the subframe may be indicated, for example, the index of the subframe on the sidelink or the index of the subframe in the sidelink resource pool.

Optionally, in this embodiment of the present application, the seventh indication information may be included in the UCI, MAC CE, or RRC message, and it is understood that the device identification information of the second terminal device corresponding to the side chain authority determined to be discarded may also be included in the UCI, MAC CE, or RRC message, for example, one field in the MAC CE is used to indicate the first terminal device to determine to discard the side chain authority and the end time of the side chain DRX activation time or the device identification information, or one or more bits in the MAC CE are used to indicate the first terminal device to determine to discard the side chain authority and the end time of the side chain DRX activation time or the device identification information, or a PUCCH or PUSCH or PRACH is used to indicate the first terminal device to determine to discard the side chain authority and the end time of the side chain DRX activation time or the device identification information, where, in a manner indicated for the PRACH, a PRACH resource may be defined, where the PRACH resource is used to instruct the first terminal device to determine to discard the sidechain permission and an end time of the sidechain DRX activation time or the device identification information. (4) If the first terminal device discards or determines to discard a certain side link permission sent by the network device, the first terminal device may trigger sending of eighth indication information to the network device, where the eighth indication information is used to indicate a timeout time of drx-InactivityTimerPC5 corresponding to the side link permission.

Optionally, in this embodiment of the application, the eighth indication information may also indicate that the first terminal device discards or discards the side chain authority.

Optionally, in this embodiment of the application, when the first terminal device sends the eighth indication information to the network device, the first terminal device may further send, to the network device, device identification information of the second terminal device corresponding to the side chain authority that is determined to be discarded, that is, the device identification information of the second terminal device at the end of the side chain DRX activation time.

Optionally, in this embodiment of the application, after determining to discard the side chain authority, or discard the time domain position of the resource indicated by the side chain authority, or the end time of the time domain position of the first sidelink transmission indicated by the side chain authority, or the first time slot or symbol after the end of the time domain position of the first sidelink transmission included in the side chain authority, or after determining to discard the side chain authority, or the end time of the time domain position of the first sidelink transmission included in the side chain authority, or the end time of the interval before the end of the side chain DRX activation time, the first terminal device may trigger to send the eighth indication information to the network device, or send the eighth indication information to the network device.

Optionally, in this embodiment of the application, if the first terminal device determines to discard the side chain right or discard the side chain right, and the first terminal device sends a BSR to the network device, the eighth indication information and the device identification information of the second terminal device corresponding to the discarded side chain right may be sent to the network device at the same time.

Optionally, in this embodiment of the present application, the first terminal device may determine the timeout time of drx-inactivityttimerpc 5 according to the time domain position of the transmitted PSCCH, psch, or SCI. For example, before or after the discarded side chain authority, after the first terminal device sends PSCCH, psch, SCI, or MAC PDU to the second terminal device, the first terminal device starts or restarts drx-inactivityttimerpc 5, and times out after running drx-InactivityTimerPC5 for a duration.

Optionally, in this embodiment of the application, if the first terminal device uses or determines to use another resource indicated by the side chain authority to transmit the PSCCH, or SCI after the time domain position of the resource indicated by the discarded side chain authority and before the timeout time of the drx-inactivity timer pc5 or a time interval before the timeout time, the first terminal device cancels the transmission of the eighth indication information to the network device. That is, if the discarded side chain permission is followed by the last side chain permission during the drx-inactivityttimerpc 5 operation for transmitting the PSCCH, or SCI to the second terminal device, the first terminal device transmits the eighth indication information to the network device or triggers the transmission of the eighth indication information to the network device.

Optionally, if the first terminal device uses the resource indicated by another side chain authority to send PSCCH, or SCI after the time domain position of the resource indicated by the discarded side chain authority and before sending the eighth indication information to the network device and determining the device identification information of the second terminal device corresponding to the discarded side chain authority, the first terminal device cancels sending the eighth indication information to the network device, and determines the device identification information of the second terminal device corresponding to the discarded side chain authority.

Optionally, if the first terminal device uses the resource indicated by the other side chain authority to transmit the PSCCH, or SCI before transmitting the eighth indication information to the network device to determine the device identification information of the second terminal device corresponding to the discarded side chain authority, or the first terminal device determines to use the resource indicated by the other side chain authority to transmit the PSCCH, or SCI, the first terminal device cancels transmission of the eighth indication information to the network device and determines the device identification information of the second terminal device corresponding to the discarded side chain authority.

Optionally, in this embodiment of the application, if the DRX-onDurationTimerPC5 of the second terminal device is started or operated before the eighth indication information is sent to the network device, that is, the next cycle of the side chain DRX activation time starts, the first terminal device cancels sending the eighth indication information to the network device, and determines the device identifier information of the second terminal device corresponding to the discarded side chain right.

Optionally, in this embodiment of the present application, if the first terminal device does not cause the change of the sidechain DRX activation time even if the first terminal device transmits the PSCCH, psch, or SCI to the second terminal device using the discarded sidechain permission, that is, the sidechain DRX activation time determined by the network device is consistent with the sidechain DRX activation time determined by the first terminal device, the first terminal device does not transmit the eighth indication information to the network device. If the first terminal device sends the PSCCH, psch, or SCI to the second terminal using the discarded side chain permission to cause the change of the side chain DRX activation time, that is, after the side chain permission is discarded, the side chain DRX activation time determined by the network device is inconsistent with the side chain DRX activation time determined by the first terminal device, the first terminal device sends eighth indication information to the network device. For example, after the first terminal device transmits PSCCH, psch, SCI, or MAC PDU to the second terminal device on the resource indicated by the first sidelink authority before the discarded sidelink authority, the end time of the first sidelink DRX activation time is determined according to the PSCCH, psch, SCI, or MAC PDU transmission. And if the first terminal equipment sends the PSCCH, the PSSCH, the SCI or the MAC PDU to the second terminal equipment on the resource indicated by the discarded side chain authority, determining the ending moment of the DRX activation time of the second side chain according to the transmission of the PSCCH, the PSSCH, the SCI or the MAC PDU. And if the ending time of the second side chain DRX activation time is equal to the ending time of the first side chain DRX activation time, the first terminal equipment does not send eighth indication information to the network equipment, and the equipment identification information of the second terminal equipment corresponding to the discarded side chain authority is determined. And if the end time of the second side chain DRX activation time is not equal to the end time of the first side chain DRX activation time, the first terminal equipment sends eighth indication information to the network equipment.

Optionally, in this embodiment of the present application, when the first terminal device indicates the timeout time of drx-InactivityTimerPC5 to the network device, the last time slot or symbol before the timeout of drx-InactivityTimerPC5 may be indicated, alternatively, the first time slot or symbol after the timeout of drx-InactivityTimerPC5 may be indicated, wherein, at the first time slot after the time-out time of the indication drx-InactivityTimerPC5, the SFN or DFN in which the slot is located and the index within the SFN or DFN in which the slot is located may be indicated, or, the subframe in which the slot is located and the index of the slot within the subframe, or, the index of the slot, such as an index indicating a time slot on the sidelink or an index of a time slot within the sidelink resource pool, when the first symbol after the timeout time of the drx-inactivity timerpc5 is indicated, the index of the symbol within the subframe or slot and the subframe or slot may be indicated. When indicating the subframe, the SFN or DFN in which the subframe is located and the index within the SFN or DFN in which the subframe is located may be indicated, or the index of the subframe may be indicated, for example, the index of the subframe on the sidelink or the index of the subframe in the sidelink resource pool.

Optionally, in this embodiment of the present application, the eighth indication information may be included in the UCI, MAC CE or RRC message, and it is understood that the device identification information of the second terminal device corresponding to the side chain authority determined to be discarded may also be included in the UCI, MAC CE or RRC message, for example, one field in the MAC CE is used to indicate the timeout time or the device identification information of the first terminal device determining to discard the side chain authority and drx-InactivityTimerPC5, or one or more bits in the MAC CE are used to indicate the timeout time or the device identification information of the first terminal device determining to discard the side chain authority and drx-InactivityTimerPC5, or PUCCH or PUSCH or PRACH is used to indicate the timeout time and/or the device identification information of the first terminal device determining to discard the side chain authority and drx-inactivityppc 5, where, in a manner for PRACH indication, a PRACH resource may be defined, where the PRACH resource is used to instruct the first terminal device to determine to discard the side chain right and a timeout time of the drx-InactivityTimerPC5 or the device identification information.

(5) And if the first terminal equipment discards or determines to discard a certain side chain authority sent by the network equipment, sending ninth indication information to the network equipment, wherein the ninth indication information is used for indicating the time domain position of the resource indicated by the side chain authority. It is to be understood that the ninth indication information may also indicate that the first terminal device discards or determines to discard the side chain authority.

Optionally, in this embodiment of the application, when the first terminal device indicates, to the network device, a time domain position of the resource indicated by the side chain authority, the time slot where the resource of the first sidelink transmission included in the side chain authority is located may be indicated, where the time slot may indicate an SFN or DFN where the time slot is located and an index in the SFN or DFN where the time slot is located, or indicate a subframe where the time slot is located and an index in the subframe of the time slot, or indicate an index of the time slot, such as an index of the time slot on the side link or an index of the time slot in the side link resource pool, and indicate the subframe or the time slot. When indicating the subframe, the SFN or DFN in which the subframe is located and the index within the SFN or DFN in which the subframe is located may be indicated, or the index of the subframe may be indicated, for example, the index of the subframe on the sidelink or the index of the subframe in the sidelink resource pool.

Optionally, in this embodiment of the application, when the first terminal device sends the ninth indication information to the network device, the first terminal device may further send, to the network device, device identification information of the second terminal device corresponding to the determined discarded side chain permission.

Optionally, in this embodiment of the application, when the first terminal device sends the ninth indication information to the network device, the first terminal device may further send, to the network device, a frequency domain position of a discarded side chain authority, such as a lowest sub-channel index or a lowest Physical Resource Block (PRB) index of a resource for the first sidelink transmission included in the side chain authority.

Optionally, in this embodiment of the application, when the first terminal device sends the ninth indication information to the network device, the first terminal device may further send configuration index information of the discarded side chain authority to the network device.

Optionally, in this embodiment of the application, if only one side chain authority is located in the time domain position of the discarded side chain authority, when the first terminal device sends the ninth indication information to the network device, the first terminal device does not send the frequency domain position of the discarded side chain authority or the configuration index information to the network device.

Optionally, in this embodiment of the present application, the first terminal device may determine the side-chain DRX activation time according to a time domain position of the transmitted PSCCH, psch, or SCI, or a DRX-onDurationTimerPC 5. For example, before or after the discarded sidechain authority, after the first terminal device transmits PSCCH, psch, SCI, or MAC PDU to the second terminal device, the first terminal device starts or restarts DRX-inactivityttimerpc 5, the sidechain DRX activation time includes DRX-InactivityTimerPC5 running time, and the end time of the sidechain DRX activation time is later than or equal to DRX-inactivityttimerpc 5 timeout time. If the first terminal device does not send PSCCH, PSCCH or SCI to the second terminal device during the DRX-onDurationTimerPC5 operation, the end time of the sidechain DRX activation time is the timeout time of the DRX-onDurationTimerPC 5. The side chain DRX activation time here is a continuous period of time.

Alternatively, in this embodiment of the present application, the first terminal device may determine, after determining to discard the side chain authority, either after discarding the side-chain right, or after the temporal location of the resource indicated by the side-chain right, or the end time of the time domain position of the first sidelink transmission included in the sidechain authority, or the first time slot or symbol after the end of the time domain position of the first sidelink transmission included in the sidechain authority, or after determining to discard the side chain authority, or after discarding the side chain authority, or at a time interval after the end of the time domain position of the first sidelink transmission included in the side chain authority, or the end time of the side chain DRX activation time or the time of a certain interval before the end of the side chain DRX activation time triggers to send ninth indication information to the network equipment, or sends the ninth indication information to the network equipment.

Optionally, in this embodiment of the application, if the first terminal device determines to discard the side chain permission or discard the side chain permission, and the first terminal device triggers to send the buffer status report BSR to the network device, it may trigger to send the ninth indication information to the network device and determine the device identification information of the second terminal device corresponding to the discarded side chain permission.

Optionally, in this embodiment of the application, if the first terminal device determines to discard the side chain right or discard the side chain right, and the first terminal device triggers to send a BSR to the network device, the first terminal device may simultaneously trigger to send the ninth indication information to the network device and determine device identification information of the second terminal device corresponding to the discarded side chain right.

Optionally, if the first terminal device uses the resource indicated by another side chain authority to send PSCCH, psch, or SCI after determining the time domain position of the resource indicated by the discarded side chain authority and before triggering to send the ninth indication information to the network device and determining the device identification information of the second terminal device corresponding to the discarded side chain authority, the first terminal device cancels triggering to send the ninth indication information to the network device, and cancels triggering to determine the device identification information of the second terminal device corresponding to the discarded side chain authority.

Optionally, if the first terminal device uses the resource indicated by the other side chain authority to transmit the PSCCH, or SCI before triggering to transmit the ninth indication information to the network device to determine the device identification information of the second terminal device corresponding to the discarded side chain authority, or the first terminal device determines to use the resource indicated by the other side chain authority to transmit the PSCCH, or SCI, the first terminal device cancels transmission of the ninth indication information to the network device, and determines the device identification information of the second terminal device corresponding to the discarded side chain authority.

Optionally, in this embodiment of the application, if, before the ninth indication information is sent to the network device, the DRX-onDurationTimerPC5 of the next cycle of the second terminal device is started or operated, that is, the side chain DRX activation time starts, the first terminal device cancels sending the ninth indication information to the network device, and determines the device identifier information of the second terminal device corresponding to the discarded side chain right.

Optionally, in this embodiment of the present application, if the first terminal device does not cause the change of the sidechain DRX activation time even if the first terminal device transmits the PSCCH, psch, or SCI to the second terminal device using the discarded sidechain permission, that is, the sidechain DRX activation time determined by the network device is consistent with the sidechain DRX activation time determined by the first terminal device, the first terminal device does not transmit the ninth indication information to the network device. If the first terminal device sends the PSCCH, psch, or SCI to the second terminal using the discarded side chain permission to cause the change of the side chain DRX activation time, that is, after the side chain permission is discarded, the side chain DRX activation time determined by the network device is inconsistent with the side chain DRX activation time determined by the first terminal device, the first terminal device sends ninth indication information to the network device. For example, after the first terminal device transmits PSCCH, psch, SCI, or MAC PDU to the second terminal device on the resource indicated by the first sidelink authority before the discarded sidelink authority, the end time of the first sidelink DRX activation time is determined according to the PSCCH, psch, SCI, or MAC PDU transmission. And if the first terminal equipment sends the PSCCH, the PSSCH, the SCI or the MAC PDU to the second terminal equipment on the resource indicated by the discarded side chain authority, determining the ending moment of the DRX activation time of the second side chain according to the transmission of the PSCCH, the PSSCH, the SCI or the MAC PDU. And if the ending time of the second side chain DRX activation time is equal to the ending time of the first side chain DRX activation time, the first terminal equipment does not trigger to send ninth indication information to the network equipment, and determines the equipment identification information of the second terminal equipment corresponding to the discarded side chain authority.

Optionally, in this embodiment of the present application, the ninth indication information and the device identification information of the second terminal device corresponding to the side chain authority determined to be discarded may be included in UCI, MAC CE or RRC message, for example, a field in the MAC CE is used to indicate a time domain position and/or the device identification information of the first terminal device for determining to discard the side chain authority and the resource indicated by the side chain authority, or one or more bits in the MAC CE are used to indicate a time domain position and/or the device identification information of the first terminal device for determining to discard the side chain authority and the resource indicated by the side chain authority, or a PUCCH or PUSCH or PRACH is used to indicate a time domain position and/or the device identification information of the first terminal device for determining to discard the side chain authority and the resource indicated by the side chain authority, where a manner indicated for the PRACH is used, a PRACH resource may be defined, where the PRACH resource is used to instruct the first terminal device to determine to discard the sidechain permission and a time domain location of a resource indicated by the sidechain permission and/or the device identification information.

(6) If the first terminal device determines to discard a side link right sent by the network device, the first terminal device may trigger to send tenth indication information to the network device, where the tenth indication information is used to indicate a time slot where the DCI or PDCCH scheduling the side link right is located, for example, may indicate an SFN or DFN where the time slot is located and an index within the SFN or DFN where the time slot is located, or indicate a subframe where the time slot is located and an index within the subframe of the time slot, or indicate an index of the time slot, such as an index indicating the time slot on a sidelink or an index indicating the time slot in a sidelink resource pool.

Optionally, in this embodiment of the application, when the first terminal device sends the tenth indication information to the triggering network device, the first terminal device may further trigger to send, to the network device, device identification information of the second terminal device corresponding to the determined discarded side chain permission.

Optionally, in this embodiment of the application, when the first terminal device triggers to send the tenth indication information to the network device, the first terminal device may further trigger to send, to the network device, a DCI scheduling the side-chain permission or a frequency domain position of a PDCCH, such as a lowest sub-channel index or a lowest PRB index of a resource for a first sidelink transmission included in the side-chain permission.

Optionally, in this embodiment of the application, when the first terminal device triggers to send the tenth indication information to the network device, the first terminal device may further trigger to send a Control Channel Element (CCE) index of a DCI or a PDCCH scheduling the side chain right to the network device.

Optionally, in this embodiment of the application, when the first terminal device triggers sending of the tenth indication information to the network device, the first terminal device may further trigger sending of a "Time gap" field of the DCI or PDCCH scheduling the side-chain permission to the network device.

Optionally, in this embodiment of the present application, the network device may determine the side chain authority discarded by the first terminal device according to the DCI or PDCCH of the side chain authority discarded by scheduling, and further determine the side chain DRX activation time.

(7) And if the first terminal equipment discards or determines to discard a certain side chain authority sent by the network equipment, sending eleventh indication information to the network equipment, wherein the eleventh indication information is used for indicating the time domain position of the previous side chain authority of the discarded side chain authority. It is to be understood that the eleventh indication information may also indicate that the first terminal device discards or discards the side chain right.

Optionally, in this embodiment of the present application, the network device may obtain, according to a previous side chain authority that determines the discarded side chain authority, an end time of the side chain DRX activation time of the second terminal device that determines the discarded side chain authority, for example, the end time of the side chain DRX activation time is a time when the time length of DRX-InactivityTimerPC5 is added to the time domain position of the resource indicated by the previous side chain authority, or the end time of the side chain DRX activation time is the end time of the side chain DRX activation time of the second terminal device that corresponds to the previous side chain authority.

(8) And if the first terminal device determines to discard a certain side chain permission sent by the network device, sending twelfth indication information to the network device, wherein the twelfth indication information is used for indicating the time domain position of the DCI or PDCCH of the previous side chain permission for scheduling the side chain permission.

Optionally, in this embodiment of the present application, the network device may determine, according to the DCI or PDCCH that determines the discarded previous side chain permission, that the first terminal device determines the previous side chain permission before the discarded side chain permission, and the network device may obtain, according to the previous side chain permission that determines the discarded side chain permission, an end time of a side chain DRX activation time of the second terminal device that corresponds to the discarded side chain permission, where, for example, the end time of the side chain DRX activation time is a time obtained by adding a time length of DRX-InactivityTimerPC5 to a time domain position of a resource indicated by the previous side chain permission, or the end time of the side chain DRX activation time is an end time of the side chain DRX activation time of the second terminal device that corresponds to the previous side chain permission.

In order to solve the second problem, that is, how to avoid the problem that if the SCI indicates N resources, the time domain positions of the resources other than the first resource may not be within the side-chain DRX activation time of the terminal device at the receiving end, so that the terminal device cannot monitor the transmissions on the N resources, and the resources other than the first resource are wasted, the embodiment of the present application provides a scheme of the following embodiment 4, where the embodiment 4 may be implemented in combination with the above embodiment 1, embodiment 2, or embodiment 3, and the following description specifically describes the following.

Example 4

In some embodiments, the side-chain DRX activation time of the terminal device may include a time domain location where one or more resources indicated by the SCI are located, each of the one or more resources may be a resource for SCI transmission, or each of the one or more resources may be a resource for PSCCH and PSCCH transmission, or each of the one or more resources may be a resource for PSCCH transmission.

Alternatively, if the terminal device receives the PSCCH, SCI, or MAC PDU and the corresponding sidelink process fails to decode data, the sidelink DRX activation time may include a time domain location of one or more resources indicated by the SCI (corresponding to the PSCCH, or MAC PDU).

Optionally, when the SCI indicates more than one resource, the terminal device does not start drx-HARQ-RTT-TimerPC5 of the corresponding sidelink process, that is, when the SCI indicates only one resource, the terminal device starts drx-HARQ-RTT-TimerPC5 of the corresponding sidelink process, and the specific start time is as described in embodiment 1, embodiment 2, or embodiment 3.

Optionally, in a case that the SCI indicates more than one resource, the terminal device does not start the drx-retransmission timerpc5 of the corresponding sidechain process, that is, in a case that the SCI indicates only one resource, the terminal device starts the drx-retransmission timerpc5 of the corresponding sidechain process, and a specific starting time is as described in embodiment 1 or embodiment 2 or embodiment 3.

In other embodiments, the terminal device needs to monitor PSCCH, psch, or SCI at the time domain location of the one or more resources indicated by the SCI, that is, the terminal device needs to monitor PSCCH, psch, or SCI at the time domain location of the one or more resources indicated by the SCI even if the time domain location of the one or more resources indicated by the SCI is not within the side chain DRX activation time.

Alternatively, if the terminal device receives the PSCCH, SCI, or MAC PDU and the corresponding sidelink process fails to decode data, the terminal device may need to monitor the PSCCH, or SCI at a time domain location where one or more resources indicated by the SCI (corresponding to the PSCCH, or MAC PDU) are located.

In other embodiments, if the terminal device receives the PSCCH, psch, SCI, or MAC PDU, if the SCI (corresponding to the PSCCH, psch, or MAC PDU) indicates more than one resource, the duration of the drx-HARQ-RTT-TimerPC5 of the corresponding sidelink process is a first duration, and the first duration is determined according to a temporal location of the resource indicated by the SCI, or the first duration is determined according to an offset of the resource indicated by the SCI from the temporal location of the SCI.

If the SCI (corresponding to PSCCH, psch, or MAC PDU) indicates only one resource, the duration of drx-HARQ-RTT-TimerPC5 of the corresponding sidelink process is a second duration, which may be determined by the terminal device at the transmitting end, the terminal device at the receiving end, or the network device.

When the duration of the drx-HARQ-RTT-TimerPC5 is the first duration, the first symbol, timeslot, or subframe after the drx-HARQ-RTT-TimerPC5 times out is the time domain position of the second resource, or the start of the time domain position of the second resource, or the time domain position of the third resource, or the start of the time domain position of the third resource, indicated by the SCI.

If more than one resource is indicated by the SCI (corresponding to PSCCH, psch or MAC PDU), the duration of the drx-retransmission timerpc5 of the corresponding sidechain process is 1 slot, or the duration of drx-retransmission timerpc5 is the length of time of one resource indicated by the SCI.

If the SCI (corresponding to PSCCH, psch, or MAC PDU) indicates only one resource, the duration of drx-retransmission timer pc of the corresponding side-chain process is a third duration, which may be determined by the terminal device at the transmitting end, or determined by the terminal device at the receiving end, or determined by the network device.

If the terminal equipment receives the PSCCH, PSSCH, SCI or MAC PDU at the time slot of the time domain position t0 of the first resource indicated by the SCI, if the SCI (corresponding to the PSCCH, PSSCH or MAC PDU) indicates more than one resource, the drx-HARQ-RTT-TimerPC5 of the corresponding side-chain process is started at the time slot (t0+ n1), and the drx-retransmission TimerPC5 of the corresponding side-chain process is stopped. The time length of drx-HARQ-RTT-TimerPC5 is a first time length, and the first time length is equal to the time slot of the time domain position (t0+ t1) minus the time slot (t0+ n1) of the second resource indicated by the SCI, and the time slot (t0+ n1) is the time slot in which the first resource is located. If the received SCI at the t0 slot indicates more than two resources, the terminal device does not receive PSCCH, SCI, or MAC PDU at the time domain position of the second resource, starts drx-HARQ-RTT-TimerPC5 of the corresponding sidelink process at the (t0+ n2) slot, and stops drx-retransmission TimerPC5 of the corresponding sidelink process. The time length of drx-HARQ-RTT-TimerPC5 is a fourth time length equal to the time slot of the time domain position (t0+ t2) minus the time slot (t0+ n2) of the third resource indicated by the SCI.

In other embodiments, if the terminal device receives the PSCCH, psch, SCI, or MAC PDU, if the SCI (corresponding to the PSCCH, psch, or MAC PDU) indicates more than one resource, the drx-retransmission timerpc5 of the corresponding sidechain process starts or restarts at the time domain location (slot) where the resource or resources indicated by the SCI are located. The duration of drx-retransmission timerpc5 is 1 slot, or the duration of drx-retransmission timerpc5 is the length of time of one resource indicated by the SCI.

Optionally, if the terminal device receives PSCCH, SCI, or MAC PDU (corresponding to PSCCH, or MAC PDU) that indicates more than one resource and the data of the corresponding sidechain process is not decoded successfully, drx-retransmission timerpc5 is started or restarted at the time domain location (slot) where the resource or resources indicated by the SCI are located.

If the terminal device receives the PSCCH, SCI, or MAC PDU, if the SCI (corresponding to the PSCCH, or MAC PDU) indicates more than one resource, the drx-retransmission timerpc5 of the corresponding sidelink process is stopped at the first symbol or slot or subframe or minislot after the end of transmission carrying the sidelink HARQ feedback, or drx-retransmission timerpc5 of the corresponding sidelink process is stopped at the first symbol or slot or subframe or minislot after the end of transmission of the PSCCH, psch, SCI, or MAC PDU.

In other embodiments, if the terminal device receives the PSCCH, psch, SCI, or MAC PDU, if the SCI (corresponding to the PSCCH, psch, or MAC PDU) indicates more than one resource and the terminal device does not receive the SCI at the time domain position (time slot) of the second resource or the third resource indicated by the SCI, the terminal device still starts the drx-HARQ-RTT-TimerPC5 or drx-retransmission TimerPC5 of the corresponding sidelink procedure, and the specific starting time is as described in embodiment 1 or embodiment 2 or embodiment 3, that is, the same as the terminal device receives the SCI at the time domain position (time slot) of the second resource or the third resource indicated by the SCI.

It should be noted that, in this embodiment of the present application, the terminal device may use the method in embodiment 4 when determining whether the timer is started according to whether the SCI indicates more than one resource, for example, if one or more resources indicated by the SCI are not preempted by other terminal devices, the terminal device adopts the method in embodiment 4. And using the method of embodiment 1 or embodiment 2 or embodiment 3 if the SCI indicates more than one resource independent of whether the timer is started, e.g. if one or more resources indicated by the SCI may be preempted by other terminal devices, the terminal device adopts the method of embodiment 1 or embodiment 2 or embodiment 3.

Illustratively, the lack of preemption of the one or more resources indicated by the SCI by other end-point devices may include one or more of:

1) preemption (pre-election) is disabled;

2) the priority indicated by SCI is the minimum value or the maximum value of the priority value range;

3) preemption (pre-preemption) is enabled and the priority indicated by the SCI is the minimum or maximum of the range of priority values;

4) the preemption threshold is the minimum value or the maximum value of the priority value range;

5) preemption (pre-preemption) is not enabled, and the preemption threshold is the minimum value or the maximum value of the priority value range;

6) The terminal device transmitting the SCI uses a resource allocation pattern scheduled by the base station.

Optionally, under the condition of priority transmission with a smaller value, the priority indicated by the SCI is the minimum value of the priority value range, and the preemption threshold is the minimum value of the priority value range; under the condition of priority transmission with a larger value, the priority indicated by the SCI is the maximum value of the priority value range, and the preemption threshold is the maximum value of the priority value range.

Illustratively, the possibility that one or more resources indicated by the SCI may be preempted by other terminal devices includes one or more of the following:

1) the priority indicated by the SCI is greater than the minimum value of the priority value range;

2) preemption (pre-preemption) is enabled and the priority indicated by the SCI is greater than the minimum of the priority value range;

3) the preemption threshold is larger than the minimum value of the priority value range;

4) preemption (pre-preemption) is not enabled, and a preemption threshold is greater than the minimum of the priority value range;

5) preemption is enabled;

6) the preemption threshold is larger than the minimum value of the priority value range, and the priority indicated by the SCI is larger than the minimum value of the priority value range;

7) preemption (pre-preemption) is not enabled, a preemption threshold is larger than the minimum value of a priority value range, the priority indicated by SCI is larger than the minimum value of the priority value range, and the priority with smaller value is transmitted preferentially;

8) The terminal device transmitting the SCI uses a resource allocation pattern of autonomous resource selection.

Alternatively, the possible preemption by other terminal devices of the one or more resources indicated by the SCI may include one or more of the following:

1) the priority indicated by the SCI is smaller than the maximum value of the priority value range;

2) preemption (pre-preemption) is enabled and the priority indicated by the SCI is less than the maximum of the priority span;

3) the preemption threshold is smaller than the maximum value of the priority value range;

4) preemption (pre-preemption) is not enabled, and a preemption threshold is less than the maximum value of the priority value range;

5) preemption is enabled;

6) the preemption threshold is smaller than the maximum value of the priority value range, and the priority indicated by the SCI is smaller than the maximum value of the priority value range;

7) preemption (pre-preemption) is not enabled, a preemption threshold is smaller than the maximum value of a priority value range, the priority indicated by SCI is smaller than the maximum value of the priority value range, and the priority with larger value is transmitted preferentially;

The method provided by the embodiment of the present application is described in detail above with reference to fig. 4 to 5 b. The following describes the apparatus provided in the embodiment of the present application in detail with reference to fig. 6 to 8.

Based on the same technical concept, the present application further provides a DRX apparatus 600, where the apparatus 600 may be a first terminal device, or an apparatus 600 in the first terminal device, and the apparatus 600 includes modules for performing the method shown in fig. 4. For example, referring to fig. 6, the apparatus 600 may include:

a first sending module 601, configured to send a side chain discontinuous reception DRX parameter or indication information of a second terminal device to a network device, so that the network device determines a first period based on the side chain DRX parameter or the indication information; the indication information is used for indicating the start and/or the end of the first period, the first period belongs to a side chain DRX activation time of the second terminal equipment, and the second terminal equipment is equipment for performing side link communication with the first terminal equipment;

a receiving module 602, configured to receive the side chain permission sent by the network device; wherein the sidelink authority is used for instructing the first terminal device to transmit a resource of a physical sidelink control channel PSCCH and/or a physical sidelink shared channel PSSCH, and the time domain position of the resource is within the first time period;

A second transmitting module 603, configured to transmit the PSCCH and/or PSCCH based on the side chain right.

In one possible design, when sending the indication information to the network device, the first sending module 601 is specifically configured to:

sending first indication information to the network equipment at the starting moment of the first time interval; the first indication information is used for indicating the end time of the first time interval; or,

sending second indication information to the network equipment at the starting time of the first time interval, and sending third indication information to the network equipment at the ending time of the first time interval; wherein the second indication information is used for indicating the beginning of the first time interval, and the third indication information is used for indicating the end of the first time interval.

In one possible design, the first period belongs to a side chain DRX activation time of the second terminal device, comprising:

the first period comprises a side chain DRX activation time of each of the second terminal devices; or,

The first period comprises an intersection or union of the side chain DRX activation times of at least two of the second terminal devices.

In one possible design, the first period comprises an intersection or union of side-chain DRX activation times of at least two of the second terminal devices, comprising:

the first period of time comprises any one or combination of more of the following:

the earliest starting time to the earliest ending time in the side chain DRX activation time of each second terminal device;

the side chain DRX activation time of each second terminal device is from the earliest starting time to the latest ending time;

the side chain DRX activation time of each second terminal device is from the latest starting time to the earliest ending time;

the side chain DRX activation time of each second terminal device is from the latest starting time to the latest ending time;

the side chain DRX activation time of any one second terminal equipment begins or ends to the side chain DRX activation time of any one second terminal equipment begins or ends.

In a possible design, if the first period includes a side chain DRX activation time of each of the second terminal devices, the receiving module 602 is specifically configured to:

And receiving the side chain authority and the equipment identification information sent by the network equipment, and determining the second terminal equipment corresponding to the side chain authority based on the equipment identification information.

In one possible design, the side chain DRX activation times comprise run times of a DRX duration timer and a DRX deactivation timer, the DRX deactivation timer being started or restarted when the first terminal device transmits PSCCH and/or PSCCH; or,

the DRX deactivation timer is started or restarted when the first terminal equipment receives HARQ feedback information of the second terminal equipment based on the PSCCH and/or the PSSCH; or,

the DRX deactivation timer is started or restarted when the first terminal equipment sends fourth indication information to the network equipment and the second terminal equipment; wherein the fourth indication information is used for indicating that the DRX deactivation timer is started or restarted.

In one possible design, the DRX deactivation timer is started or restarted when the first terminal device receives sidelink control information SCI and information included in the SCI satisfies a preset condition; the SCI comprises any one or more of a source address layer identifier source layer-1ID, a destination address layer identifier destination layer-1ID or a communication type cast type, wherein the cast type is used for indicating unicast communication, multicast communication or broadcast communication.

In one possible design, the SCI includes a source layer-1ID and a destination layer-1ID, and when the destination layer-1ID is the same as the layer-1ID of the first terminal device and the source layer-1ID is the same as the layer-1ID of the second terminal device, the first terminal device starts or restarts the DRX deactivation timer corresponding to a side chain DRX between the first terminal device and the second terminal device; or,

the SCI comprises source layer-1ID, destination layer-1ID and a cast type, when the cast type indicates unicast communication, the destination layer-1ID is the same as the layer-1ID of the first terminal equipment, and the source layer-1ID is the same as the layer-1ID of the second terminal equipment, the first terminal equipment starts or restarts the DRX deactivation timer corresponding to side chain DRX between the first terminal equipment and the second terminal equipment; or,

the SCI comprises destination layer-1ID and a cast type, and when the cast type is used for indicating multicast communication, and the destination layer-1ID is the same as the destination layer-1ID of the multicast communication, the first terminal equipment starts or restarts the DRX deactivation timer corresponding to the side chain DRX of the multicast communication.

In one possible design, a destination layer-1ID included in the SCI is the same as a layer-1ID of the first terminal device in any sidelink unicast communication, and a source layer-1ID included in the SCI is the same as a layer-1ID of a second terminal device corresponding to the first terminal device in the sidelink unicast communication, and the apparatus further includes a processing module configured to:

canceling or restarting the DRX deactivation timer corresponding to a side-chain DRX between the first terminal device and the second terminal device; wherein the first terminal device determines that a source address layer two identifier source-2 ID of a media access control protocol data unit, MAC PDU, corresponding to the SCI is different from a layer-2ID of a second terminal device corresponding to the first terminal device in the sidelink unicast communication, or a destination address layer two identifier destination-2 ID of the MAC PDU corresponding to the SCI is different from the layer-2ID of the first terminal device in the sidelink unicast communication; or,

configuring layer-2ID in the sidelink unicast communication between the first terminal equipment and the second terminal equipment; wherein the layer-1ID corresponding to the layer-2ID is different from the layer-1ID corresponding to the layer-2ID configured by the first terminal device in the sidelink unicast communication with other second terminal devices; or,

Configuring layer-2ID in the sidelink unicast communication between the first terminal equipment and the second terminal equipment; the layer-1ID corresponding to the layer-2ID is different from the layer-1ID corresponding to the layer-2ID in other sidelink unicast communication, and the other sidelink unicast communication is sidelink unicast communication in which the terminal device does not include the first terminal device.

In one possible design, the first terminal device receives the SCI or the fourth indication information, and a MAC PDU corresponding to the SCI or the fourth indication information includes only non-data information, and the processing module is further configured to:

determining that the MAC PDU corresponding to the SCI includes first information and does not include second information, and canceling or restarting the DRX deactivation timer corresponding to side chain DRX between the first terminal equipment and the second terminal equipment;

wherein the first information comprises any one or combination of more of the following: side link channel state information report, side link resource information in cooperation between terminal equipments; the second information comprises any one or combination of more of the following: data of a sidelink control channel SCCH, data of a sidelink service channel STCH, and a media access control unit MAC CE except the first information; or,

The first information comprises any one or combination of more of the following: side link channel state information report, side link resource information in cooperation between terminal devices, data of SCCH, information other than data of STCH; the second information includes data of the STCH.

In one possible design, the first terminal device receives a PSCCH, psch, or MAC PDU sent by the second terminal device, where an SCI corresponding to the PSCCH, psch, or MAC PDU indicates at least two resources, or receives the SCI sent by the second terminal device, where the SCI indicates at least two resources, and the processing module is further configured to:

starting a side chain HARQ timer or a DRX retransmission timer corresponding to a side chain DRX between the first terminal equipment and the second terminal equipment; wherein the priority indicated by the SCI is greater than the minimum value of the priority value range;

not starting a side chain HARQ timer or a DRX retransmission timer corresponding to a side chain DRX between the first terminal equipment and the second terminal equipment; wherein, the priority indicated by the SCI is the minimum value of the priority value range.

In one possible design, if the first terminal device receives a PSCCH, psch, or MAC PDU sent by the second terminal device and an SCI corresponding to the PSCCH, psch, or MAC PDU indicates at least two resources, or receives the SCI sent by the second terminal device and the SCI indicates at least two resources, the processing module is further configured to:

Respectively determining starting time for starting a side chain HARQ timer or a DRX retransmission timer corresponding to a side chain DRX between the first terminal equipment and the second terminal equipment according to each resource of at least two resources indicated by the SCI; wherein the resource comprises or indicates an SCI transmission occasion.

In one possible design, the second sending module 603 is further configured to:

if the side chain authority is determined to be discarded, sending fifth indication information to the network equipment at the end time of the first time interval or at the time of a certain interval before the end time; wherein the fifth indication information is used for indicating that the first terminal device determines to discard the side chain authority and the end of the first time period; or,

if the side chain authority is determined to be discarded, sixth indication information is sent to the network equipment; wherein the sixth indication information is used to indicate that the first terminal device determines to discard the side chain right and the end time of the first period or the time domain position of the determined discarded side chain right or the time domain position of the side chain right before the determined discarded side chain right.

Based on the same technical concept, the present application further provides a DRX apparatus 700, where the apparatus 700 may be a network device, or an apparatus 700 in a network device, and the apparatus 700 includes modules for performing the method shown in fig. 6. For example, referring to fig. 7, the apparatus 700 may include:

A determining module 701, configured to determine a first period; the first time period belongs to the side chain DRX activation time of second terminal equipment, and the second terminal equipment is equipment for performing side link communication with first terminal equipment;

a sending module 702, configured to send a side chain authority to the first terminal device, so that the first terminal device sends a physical side chain control channel PSCCH and/or a physical side chain shared channel PSCCH based on the side chain authority; wherein the side-chain permission is used for indicating the resource of the PSCCH and/or PSSCH transmitted by the first terminal equipment, and the time domain position of the resource is in the first time interval.

In one possible design, the determining module 701 is specifically configured to:

receiving a side chain DRX parameter of the second terminal equipment sent by the first terminal equipment or any second terminal equipment, and determining the first period based on the side chain DRX parameter; or,

determining the first period based on the self-configured side chain DRX parameter of the second terminal equipment; or,

receiving indication information sent by the first terminal equipment, and determining the first time interval based on the indication information; wherein the indication information is used for indicating the beginning and/or the end of the first time period.

In a possible design, the determining module 701, when receiving the indication information sent by the first terminal device, is specifically configured to:

receiving first indication information sent by the first terminal equipment at the starting moment of the first time interval; the first indication information is used for indicating the end time of the first time interval; or,

receiving second indication information sent by the first terminal equipment at the starting time of the first time interval and third indication information sent by the first terminal equipment at the ending time of the first time interval; wherein the second indication information is used for indicating the beginning of the first time interval, and the third indication information is used for indicating the end of the first time interval.

In one possible design, the first period belongs to a sidechain DRX activation time of a second terminal device, comprising:

In a possible design, if the first period includes a side chain DRX activation time of each of the second terminal devices, the sending module 702 is specifically configured to:

And sending the side chain authority and the equipment identification information to the first terminal equipment so that the first terminal equipment determines the second terminal equipment corresponding to the side chain authority based on the equipment identification information.

In one possible design, the sidechain DRX activation time comprises a DRX duration timer and a run time of a DRX deactivation timer that starts or restarts when the network device sends the sidechain permission to the first terminal device; or,

the DRX deactivation timer is started or restarted when the network equipment receives HARQ feedback information of the first terminal equipment based on the side chain authority; or,

the DRX deactivation timer is started or restarted when the network equipment receives fourth indication information sent by the first terminal equipment; wherein the fourth indication information is used for indicating that the DRX deactivation timer is started or restarted.

In one possible design, the apparatus 700 may further include: a receiving module;

the receiving module is configured to receive fifth indication information sent by the first terminal device at an end time of the first time period or a time interval before the end time; wherein the fifth indication information is used for indicating that the first terminal device determines to discard the side chain authority and the end of the first time period; or,

The network equipment receives sixth indication information sent by the first terminal equipment; wherein the sixth indication information is used to indicate that the first terminal device determines to discard the side chain right and the end time of the first period or the time domain position of the determined discarded side chain right or the time domain position of the side chain right before the determined discarded side chain right.

Based on the same technical concept, referring to fig. 8, an embodiment of the present application further provides a DRX apparatus 800, including:

at least one processor 801; and a communication interface 803 communicatively coupled to the at least one processor 801;

wherein the at least one processor 801 causes the apparatus 800 to perform the method illustrated in fig. 4 by executing instructions stored by the memory 802.

Optionally, the memory 802 is located external to the apparatus 800.

Optionally, the apparatus 800 includes the memory 802, the memory 802 is connected to the at least one processor 801, and the memory 802 stores instructions executable by the at least one processor 801. Fig. 8 shows in dashed lines that the memory 802 is optional for the device 800.

The processor 801 and the memory 802 may be coupled by an interface circuit, or may be integrated together, which is not limited herein.

The specific connection medium between the processor 801, the memory 802 and the communication interface 803 is not limited in the embodiment of the present application. In the embodiment of the present application, the processor 801, the memory 802, and the communication interface 803 are connected by a bus 804 in fig. 8, the bus is represented by a thick line in fig. 8, and the connection manner between other components is merely illustrative and not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.

It should be understood that the processors mentioned in the embodiments of the present application may be implemented by hardware or may be implemented by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

The processor may be, for example, a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

It should be noted that when the processor is a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (memory module) may be integrated into the processor.

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

Based on the same technical concept, the embodiment of the present application also provides a computer-readable storage medium, which includes a program or instructions, and when the program or instructions are run on a computer, the method as shown in fig. 4 is executed.

Based on the same technical concept, the embodiment of the present application further provides a chip, which is coupled to the memory and configured to read and execute the program instructions stored in the memory, so that the method shown in fig. 4 is executed.

Based on the same technical concept, the embodiment of the present application further provides a computer program product, which includes instructions that, when executed on a computer, cause the method shown in fig. 4 to be performed.

Based on the same technical concept, an embodiment of the present application further provides a communication system, which includes the first terminal device and the network device in the embodiment of the present application.

It should be understood that all relevant contents of each step related to the above method embodiments may be referred to the functional description of the corresponding functional module, and are not described herein again.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, and computer program products according to embodiments. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims

1. A DRX method, comprising:

the method comprises the steps that a first terminal device sends a side chain Discontinuous Reception (DRX) parameter or indication information of a second terminal device to a network device, so that the network device determines a first period based on the side chain DRX parameter or the indication information; the indication information is used for indicating the start and/or the end of the first period, the first period belongs to a side chain DRX activation time of the second terminal equipment, and the second terminal equipment is equipment for performing side link communication with the first terminal equipment;

the first terminal equipment receives the side chain authority sent by the network equipment; wherein the side chain authority is used for instructing the first terminal device to transmit a resource of a physical side chain control channel PSCCH and/or a physical side chain shared channel PSSCH, and the time domain position of the resource is within the first time period;

The first terminal device transmits the PSCCH and/or PSCCH based on the side chain permission.

2. The method of claim 1, wherein the indication information is included in Uplink Control Information (UCI), a Media Access Control (MAC) control element (MAC CE), or a Radio Resource Control (RRC) message; the side-chain authority is contained in downlink control information DCI, MAC CE or RRC message.

3. The method of claim 2, wherein the first terminal device sending indication information to a network device, comprising:

the first terminal equipment sends first indication information to the network equipment at the starting moment of the first time interval; the first indication information is used for indicating the end time of the first time interval; or,

the first terminal device sends second indication information to the network device at the starting time of the first time interval, and sends third indication information to the network device at the ending time of the first time interval; wherein the second indication information is used for indicating the beginning of the first time interval, and the third indication information is used for indicating the end of the first time interval.

4. The method according to any of claims 1-3, wherein the first period belongs to a side chain DRX activation time of the second terminal device, comprising:

5. The method of claim 4, wherein the first period comprises an intersection or union of side chain DRX activation times for at least two of the second terminal devices, comprising:

6. The method of claim 4, wherein if the first period comprises a side chain DRX activation time of each of the second terminal devices, the first terminal device receiving the side chain permission sent by the network device comprises:

And the first terminal equipment receives the side chain authority and the equipment identification information sent by the network equipment, and determines the second terminal equipment corresponding to the side chain authority based on the equipment identification information.

7. The method of claim 5, wherein the sidechain DRX activation time comprises a DRX duration timer and a run time of a DRX deactivation timer, the DRX deactivation timer being started or restarted when the first terminal device transmits a PSCCH and/or a PSSCH; or,

8. The method of claim 7, wherein the method further comprises:

the DRX deactivation timer is started or restarted when the first terminal equipment receives Sidelink Control Information (SCI) and information included in the SCI meets a preset condition; the SCI comprises any one or more of a source address layer identifier source layer-1 ID, a destination address layer identifier destination layer-1 ID or a communication type cast type, wherein the cast type is used for indicating unicast communication, multicast communication or broadcast communication.

9. The method of claim 8, wherein the SCI includes a source layer-1 ID and a destination layer-1 ID, and when the destination layer-1 ID is the same as a layer-1 ID of the first terminal device and the source layer-1 ID is the same as a layer-1 ID of the second terminal device, the first terminal device starts or restarts the DRX deactivation timer corresponding to a side chain DRX between the first terminal device and the second terminal device; or,

the SCI comprises source layer-1 ID, destination layer-1 ID and a cast type, when the cast type indicates unicast communication, the destination layer-1 ID is the same as the layer-1 ID of the first terminal equipment, and the source layer-1 ID is the same as the layer-1 ID of the second terminal equipment, the first terminal equipment starts or restarts the DRX deactivation timer corresponding to side chain DRX between the first terminal equipment and the second terminal equipment; or,

the SCI comprises destination layer-1 ID and cast type, when the cast type indicates multicast communication, and the destination layer-1 ID is the same as the destination layer-1 ID of the multicast communication, the first terminal equipment starts or restarts the DRX deactivation timer corresponding to the side chain DRX of the multicast communication.

10. The method of claim 9, wherein a destination layer-1 ID included in the SCI is the same as a layer-1 ID of the first terminal device in any sidelink unicast communication, and wherein a source layer-1 ID included in the SCI is the same as a layer-1 ID of a second terminal device to which the first terminal device corresponds in the sidelink unicast communication, the method further comprising:

the first terminal equipment cancels or restarts the DRX deactivation timer corresponding to the side chain DRX between the first terminal equipment and the second terminal equipment; wherein the first terminal device determines that a source address layer two identifier source-2 ID of a media access control protocol data unit, MAC PDU, corresponding to the SCI is different from a layer-2 ID of a second terminal device corresponding to the first terminal device in the sidelink unicast communication, or a destination address layer two identifier destination-2 ID of the MAC PDU corresponding to the SCI is different from the layer-2 ID of the first terminal device in the sidelink unicast communication; or,

the first terminal equipment configures layer-2 ID in the sidelink unicast communication between the first terminal equipment and the second terminal equipment; wherein the layer-1 ID corresponding to the layer-2 ID is different from the layer-1 ID corresponding to the layer-2 ID configured by the first terminal device in the sidelink unicast communication with other second terminal devices; or,

The first terminal equipment configures layer-2 ID in the sidelink unicast communication between the first terminal equipment and the second terminal equipment; the layer-1 ID corresponding to the layer-2 ID is different from the layer-1 ID corresponding to the layer-2 ID in other sidelink unicast communication, and the other sidelink unicast communication is sidelink unicast communication in which the terminal device does not include the first terminal device.

11. The method of claim 9 or 10, wherein the first terminal device receives the SCI or the fourth indication information and only non-data information is included in a MAC PDU corresponding to the SCI or the fourth indication information, the method further comprising:

the first terminal equipment determines that the MAC PDU corresponding to the SCI comprises first information and does not comprise second information, and cancels or restarts the DRX deactivation timer corresponding to the side chain DRX between the first terminal equipment and the second terminal equipment;

12. The method of claim 11, wherein the first terminal device receives a PSCCH, psch, or MAC PDU sent by the second terminal device and a corresponding SCI of the PSCCH, psch, or MAC PDU indicates at least two resources, or wherein the first terminal device receives the SCI sent by the second terminal device and the SCI indicates at least two resources, the method further comprising:

the first terminal equipment starts a side chain HARQ timer or a DRX retransmission timer corresponding to side chain DRX between the first terminal equipment and the second terminal equipment; wherein the priority indicated by the SCI is greater than the minimum value of the priority value range;

the first terminal equipment does not start a side chain HARQ timer or a DRX retransmission timer corresponding to side chain DRX between the first terminal equipment and the second terminal equipment; wherein, the priority indicated by the SCI is the minimum value of the priority value range.

13. The method of claim 12, wherein the first terminal device receives a PSCCH, psch, or MAC PDU sent by the second terminal device and a corresponding SCI of the PSCCH, psch, or MAC PDU indicates at least two resources, or wherein the first terminal device receives the SCI sent by the second terminal device and the SCI indicates at least two resources, the method further comprising:

the first terminal equipment respectively determines starting time for starting a side chain HARQ timer or a DRX retransmission timer corresponding to a side chain DRX between the first terminal equipment and the second terminal equipment according to each resource of at least two resources indicated by the SCI; wherein the resource comprises or indicates an SCI transmission occasion.

14. The method of claim 1, wherein after the first terminal device receives the side chain permission sent by the network device, the method further comprises:

if the first terminal device determines to discard the side chain permission, sending fifth indication information to the network device at the end time of the first time interval or at a time interval before the end time; wherein the fifth indication information is used for indicating that the first terminal device determines to discard the side chain authority and the end of the first time period; or,

If the first terminal equipment determines to discard the side chain authority, sixth indication information is sent to the network equipment; wherein the sixth indication information is used to indicate that the first terminal device determines to discard the side chain right and the end time of the first period or the time domain position of the determined discarded side chain right or the time domain position of the side chain right before the determined discarded side chain right.

15. A DRX method, comprising:

the network equipment determines a first period; the first time period belongs to the side chain DRX activation time of second terminal equipment, and the second terminal equipment is equipment for performing side link communication with first terminal equipment;

the network equipment transmits side chain authority to the first terminal equipment so that the first terminal equipment transmits a physical side chain control channel (PSCCH) and/or a physical side chain shared channel (PSSCH) based on the side chain authority; wherein the side-chain permission is used for indicating the resource of the PSCCH and/or PSSCH transmitted by the first terminal equipment, and the time domain position of the resource is in the first time interval.

16. The method of claim 15, wherein the network device determining the first period comprises:

The network equipment receives a side chain DRX parameter of the second terminal equipment sent by the first terminal equipment or any second terminal equipment, and determines the first period based on the side chain DRX parameter; or,

the network equipment determines the first period based on the side chain DRX parameter of the second terminal equipment configured by the network equipment; or,

the network equipment receives indication information sent by the first terminal equipment, and determines the first time interval based on the indication information; wherein the indication information is used for indicating the beginning and/or the end of the first time period.

17. The method of claim 16, wherein the indication information is included in uplink control information UCI, a medium access control element, MAC CE, or a radio resource control, RRC, message; the side-chain authority is contained in downlink control information DCI, MAC CE or RRC message.

18. The method of claim 17, wherein the network device receiving the indication information sent by the first terminal device comprises:

the network equipment receives first indication information sent by the first terminal equipment at the starting moment of the first time interval; the first indication information is used for indicating the end time of the first time interval; or,

The network equipment receives second indication information sent by the first terminal equipment at the starting time of the first time interval and third indication information sent by the first terminal equipment at the ending time of the first time interval; wherein the second indication information is used for indicating the beginning of the first time interval, and the third indication information is used for indicating the end of the first time interval.

19. The method according to any of claims 15-18, wherein the first period belongs to a side chain DRX activation time of a second terminal device, comprising:

20. The method of claim 19, wherein the first period comprises an intersection or union of side chain DRX activation times of at least two of the second terminal devices, comprising:

21. The method of claim 19, wherein if the first period comprises a side chain DRX activation time for each of the second terminal devices, the network device sending side chain permission to the first terminal device, comprising:

the network device sends the side chain authority and device identification information to the first terminal device, so that the first terminal device determines the second terminal device corresponding to the side chain authority based on the device identification information.

22. The method of claim 20, wherein the sidechain DRX activation time comprises a DRX duration timer and a run time of a DRX deactivation timer that is started or restarted when the network device sends the sidechain permission to the first terminal device; or,

23. The method of claim 15, wherein after the network device sends the first terminal device the side-chain permission, the method further comprises:

the network equipment receives fifth indication information sent by the first terminal equipment at the end time of the first time interval or at the time of a certain interval before the end time; wherein the fifth indication information is used for indicating that the first terminal device determines to discard the side chain authority and the end of the first time period; or,

24. A DRX apparatus, comprising:

a first sending module, configured to send a side chain Discontinuous Reception (DRX) parameter or indication information of a second terminal device to a network device, so that the network device determines a first period based on the side chain DRX parameter or the indication information; the indication information is used for indicating the start and/or the end of the first period, the first period belongs to a side chain DRX activation time of the second terminal equipment, and the second terminal equipment is equipment for performing side link communication with the first terminal equipment;

the receiving module is used for receiving the side chain authority sent by the network equipment; wherein the sidelink authority is used for instructing the first terminal device to transmit a resource of a physical sidelink control channel PSCCH and/or a physical sidelink shared channel PSSCH, and the time domain position of the resource is within the first time period;

and the second sending module is used for sending the PSCCH and/or the PSSCH based on the side chain authority.

25. A DRX apparatus, comprising:

a determining module for determining a first time period; the first time period belongs to the side chain DRX activation time of second terminal equipment, and the second terminal equipment is equipment for performing side link communication with first terminal equipment;

A sending module, configured to send a side chain authority to the first terminal device, so that the first terminal device sends a physical side chain control channel PSCCH and/or a physical side chain shared channel PSCCH based on the side chain authority; wherein the side-chain permission is used for indicating the resource of the PSCCH and/or PSSCH transmitted by the first terminal equipment, and the time domain position of the resource is in the first time interval.

26. An apparatus for DRX, the apparatus comprising:

at least one processor; and the number of the first and second groups,

a memory communicatively coupled to the at least one processor, a communication interface;

wherein the memory stores instructions executable by the at least one processor, the at least one processor performing the method of any one of claims 1-14 or 15-23 by executing the instructions stored by the memory.

27. A computer-readable storage medium comprising a program or instructions which, when run on a computer, causes the method of any of claims 1-14 or 15-23 to be performed.