CN113133118B

CN113133118B - Carrier wave determining method and device and readable storage medium

Info

Publication number: CN113133118B
Application number: CN202010044245.XA
Authority: CN
Inventors: 王达
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-01-15
Filing date: 2020-01-15
Publication date: 2023-08-08
Anticipated expiration: 2040-01-15
Also published as: CN113133118A; WO2021143493A1

Abstract

The application discloses a carrier wave determining method, a carrier wave determining device and a readable storage medium, wherein the method comprises the following steps: the first user equipment selects at least one carrier for communication with at least one second user equipment according to the channel quality of the carrier or according to the indication information of the indication equipment; the indication device is network side equipment accessed by the first user equipment or second user equipment communicated with the first user equipment. The method introduces channel quality to select carrier, i.e. the change of channel state can be considered during carrier selection, thus improving the reliability of service transmission between user equipment, and solving the problem of single carrier selection method or carrier selection mode in related technology when carrier selection is performed according to the indication of indication equipment.

Description

Carrier wave determining method and device and readable storage medium

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and apparatus for determining a carrier, and a readable storage medium.

Background

The V2X (vehicle to everything) technology can realize wireless communication among vehicles, vehicle-to-road side infrastructure, vehicle-to-road people, and vehicle-to-network, and can sense the surrounding condition of the vehicle in real time or share road information and perform early warning in time, so that the technology has become a research hotspot for solving the road safety problem for those skilled in the art in the current world.

In LTE (Long Term Evolution ) V2X technology in the related art (i.e., rel-14LTE V2X technology), a PC5 interface (also called a through link, described in terms of protocol) for transmitting data between User Equipment (ue) and the ue may already support transmission of basic traffic based on road security. With further development of internet of vehicles, in the current stage of NR (New Radio) V2X, compared with LTE V2X, some New application scenarios appear, for example: application scenarios such as vehicle formation, advanced driving, sensor information sharing, remote control and the like. Therefore, for NR V2X unicast, multicast and broadcast services, in order to improve transmission reliability and transmission rate, a multicarrier transmission mechanism is introduced, i.e. a terminal may send signal information to another terminal on multiple carriers. However, the inventors found that in the carrier selection or carrier reselection mechanism of the related art, the reliability of traffic transmission is low and the manner is single.

Disclosure of Invention

The application provides a carrier determining method, a device, user equipment, a base station and a readable storage medium, which are used for solving at least one of the problems of lower reliability of service transmission and single carrier selection mode in a carrier selection or carrier reselection mechanism in the related technology.

The application provides a carrier wave determining method, which comprises the following steps:

the first user equipment selects at least one carrier for communication with at least one second user equipment according to the channel quality of the carrier or according to the indication information of the indication equipment;

the indication device is network side equipment accessed by the first user equipment or second user equipment communicated with the first user equipment.

The method for determining the carrier wave provided by the embodiment can be applied to the first user equipment, and the first user equipment can select the carrier wave in various modes. One is that the first user equipment performs according to the channel quality of the carrier wave; the other is performed according to the indication information of the indication device. Thereby, the first user equipment can select the carrier to communicate.

Optionally, the first user equipment selects at least one carrier for communication with at least one second user equipment, including:

at carrier initial selection, the first user equipment selects at least one carrier for communication with at least one second user equipment; or alternatively, the first and second heat exchangers may be,

upon carrier reselection, the first user equipment selects at least one carrier for communication with at least one second user equipment.

The method enables the carrier selection mode to be the same as the carrier selection mode to be adopted for both the primary selection and the reselection.

Optionally, determining whether carrier reselection is required includes:

the first user equipment determines whether carrier reselection is required according to the indication information of the indication equipment; or,

the first user equipment determines whether carrier reselection is required according to the channel quality of the carrier.

This approach gives an embodiment of determining whether a carrier reselection is required or not, so that the determination of whether a carrier reselection is required or not can be performed in accordance with channel quality or indication.

Optionally, the channel quality of the carrier wave includes: channel state information of a carrier or hybrid automatic repeat request (HARQ) information fed back by the second user equipment;

wherein the channel state information includes at least one of the following parameters: channel State Information (CSI), channel Quality Indication (CQI), rank Information (RI), reference Signal Received Power (RSRP), reference Signal Received Quality (RSRQ), signal-to-interference plus noise ratio (SINR), received Signal Strength Indication (RSSI), block error rate (BLER), bit Error Rate (BER) and Sounding Reference Signal (SRS) information measured by the first user equipment.

The method enables the selection of the carrier or the judgment of whether to trigger the reselection to be carried out according to some commonly used channel quality information, so that the implementation of the embodiment of the application is simpler and more convenient.

Optionally, the determining, by the first user equipment, whether carrier reselection is required according to channel state information of the carrier includes:

and determining whether carrier reselection is required according to a first comparison result of the channel state information of the carrier and a first threshold.

The method gives a specific implementation mode for judging whether carrier reselection is needed or not according to the channel state of the carrier, so that the method for judging whether the carrier reselection is needed or not can be realized.

The method further provides a specific implementation mode for judging whether carrier reselection is needed or not according to the channel state of the carrier, so that the method for judging whether carrier reselection is needed or not can be realized.

Optionally, the determining, by the first ue, whether carrier reselection is required according to HARQ information fed back by the second ue includes:

determining a target value according to the HARQ information;

and determining whether carrier reselection is required according to a second comparison result of the target value and a second threshold.

The method provides a specific implementation mode for judging whether carrier reselection is needed or not according to the HARQ information fed back by the second user equipment, and realizes that whether carrier reselection is needed or not is determined based on the HARQ information.

Optionally, the HARQ information includes at least one of the following information: correct acknowledgement ACK, incorrect acknowledgement NACK, and discontinuous transmission DTX.

This way gives some HARQ information that can be used.

Optionally, if the first ue and the second ue are transmitted through unicast communication, the target value is the number of specified information in HARQ information fed back by the second ue; or,

the target value is the ratio of the number of the specified information to the number of the fed-back HARQ information;

wherein, the appointed information is NACK and/or DTX, or the appointed information is ACK.

This way a determination is given that the target value can be determined easily in case of unicast.

Optionally, if the first ue and the second ue perform data transmission through multicast or broadcast communication, the target value is a ratio of the number of specified information in the HARQ information fed back by the second ue to the number of fed back HARQ information; or,

if the first user equipment and the second user equipment perform data transmission through multicast communication, the target value is the ratio of the number of the specified information to the number of the second user equipment in multicast;

This way a determination is given that the target value can be determined easily in case of multicast or broadcast.

determining candidate carriers;

at least one carrier is selected from the candidate carriers for communication with at least one second user equipment.

The method provides a mode that the candidate carrier can be determined first when the carrier is selected, and then the carrier is selected from the candidate carriers, so that the selected carrier is more beneficial to communication.

Optionally, determining the candidate carrier includes:

determining whether the carrier is used as a candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold; or,

and the first user equipment determines candidate carriers according to the identifiers of the candidate carriers carried in the indication information.

This way is given as a way in which candidate carriers can be determined by interactive indications.

Optionally, the selecting, by the first user equipment, at least one carrier from the candidate carriers includes:

at least one carrier is selected in the order of channel quality of the candidate carriers.

The method shows that if a plurality of determined candidate carriers exist, the candidate carriers can be further ordered according to channel quality, so that the candidate carriers are selected according to the order from high to low, and the channel quality of the selected carriers is better.

Optionally, the indication information includes: and the selection sequence information is used for indicating the first user equipment to select at least one carrier according to the channel quality sequence of the candidate carriers.

This way it is given that a carrier with better channel quality can also be selected by obtaining the selection order information for the candidate carriers from the indication information.

Optionally, the indication information includes:

indication information for indicating whether or not a currently used carrier needs carrier reselection; or,

carrier reselection identification information indicating that carrier reselection is required.

This way, it is given that carriers for which reselection of carriers is required can be determined from the indication information.

the method comprises the steps that indication equipment sends indication information to first user equipment, wherein the indication information is used for indicating the first user equipment to select at least one carrier wave used for communicating with at least one second user equipment;

Optionally, the indicating device sends indicating information to the first user device, including:

when a carrier is initially selected, the indicating equipment sends indicating information to first user equipment; or alternatively, the first and second heat exchangers may be,

and when the carrier is reselected, the indicating equipment sends indicating information to the first user equipment.

Optionally, determining whether carrier reselection is required includes:

the indication equipment determines whether carrier reselection is required according to the channel quality of the carrier;

optionally, the channel quality of the carrier wave includes: channel state information or HARQ information of the carrier;

wherein the channel state information includes one or a combination of the following information: channel State Information (CSI), channel Quality Indicator (CQI), rank Information (RI), reference Signal Received Power (RSRP), reference Signal Received Quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), received Signal Strength Indicator (RSSI), block Error Rate (BER), and Bit Error Rate (BER);

if the indication equipment is second user equipment, the HARQ information is determined by the second user equipment; and if the indicating equipment is network side equipment, the HARQ information is fed back by the second user equipment.

Optionally, the determining, by the indicating device, whether carrier reselection is required according to channel state information of the carrier includes:

Optionally, the determining, by the indicating device, whether carrier reselection is required according to the HARQ information includes:

determining a target value according to the HARQ information;

Optionally, if the first ue and the second ue are transmitted through unicast communication, the target value is the number of specified information in the HARQ information; or,

the target value is the ratio of the number of the specified information to the number of the HARQ information;

determining candidate carriers;

generating the identification of the candidate carrier wave, and carrying the identification of the candidate carrier wave in the indication information; wherein the identification of the candidate carriers is used to cause the first user equipment to select at least one carrier from the candidate carriers for communication with at least one second user equipment.

Optionally, determining the candidate carrier includes:

and determining whether the carrier is used as a candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold.

and ordering the channel quality of the candidate carriers in the order from high to low, and generating selection order information.

Optionally, the indication information includes one of the following:

The application provides a carrier wave determining device, which comprises:

a selection unit, configured to select at least one carrier for communication with at least one second user equipment according to channel quality of the carrier or according to indication information of the indication device;

The application provides a carrier wave determining device, which comprises:

a sending unit, configured to instruct an apparatus to send indication information to a first user equipment, where the indication information is used to instruct the first user equipment to select at least one carrier for communicating with at least one second user equipment;

The application provides first user equipment, which comprises: a processor, a memory, and a transceiver;

The memory is used for storing computer instructions;

the processor being configured to execute the computer instructions to implement a method as claimed in any one of the preceding claims applied to a first user device;

the transceiver is used for receiving and transmitting data under the control of the processor.

The application provides an indication device comprising: a processor, a memory, and a transceiver;

the memory is used for storing computer instructions;

the processor for executing the computer instructions to implement the method of any of the above for application to a pointing device;

The present application provides a computer readable storage medium storing computer instructions which when executed by a processor implement a method as claimed in any preceding claim applied to a first user device or pointing device.

The present application provides a method, an apparatus, and a readable storage medium for determining a carrier, where channel quality is introduced in the method to perform carrier selection, that is, a change of channel state may be considered during carrier selection, so as to improve reliability of service transmission between user equipments, and when carrier selection is performed according to an indication of an indication device, a problem of a reliable carrier selection method or a single carrier selection manner in a related art may be solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the present application;

fig. 2 is a timing chart of a method for determining a carrier according to a first embodiment of the present application;

fig. 3 is a timing chart of a method for determining a carrier according to a second embodiment of the present application;

fig. 4 is another timing chart of a method for determining a carrier according to the second embodiment of the present application;

fig. 5 is a flowchart of a method for determining a carrier wave provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a first user device provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a pointing device according to an embodiment of the present application;

fig. 8 is a schematic diagram of a carrier determining device provided in an embodiment of the present application;

Fig. 9 is a schematic diagram of a carrier determining device provided in an embodiment of the present application.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present application, the following description will be further described in detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

Some terms appearing hereinafter are explained:

1. in the embodiment of the application, the term "and/or" describes the association relationship of the association objects, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

2. ACK (Ackonwledge Character, correct answer) information indicating that the received character is error-free. The receiving station checks the received message and if no error is found, sends an acknowledgement ACK to the sending station indicating that the message has been received correctly and is ready to receive the next message. The control character may be transmitted by the central node or by a remote node.

3. NACK (Negative Acknowledge, error response) information, the receiving station checks the received message, and if an error is found, sends a NACK to the transmitting station indicating that the message is in error and requires retransmission.

4. The BLER (Block Error Rate) refers to the percentage of erroneous blocks in all transmitted blocks. The block error rate is a long-term statistical average, and is an important index for reflecting network performance and service quality.

In a wireless network, one device transmits data to another device in blocks (blocks). The transmitting end calculates a CRC (Cyclic Redundancy Check ) using the data in the block and transmits to the receiving end together with the block. The receiving end calculates a CRC according to the received data, compares the CRC with the received CRC, and if the CRC is equal to the received CRC, the receiving end considers that the correct data is successfully received and restores an ACK to the sending end. If the two are not equal, the receiving end considers that the error data is received and replies a NACK to the sending end, and the sending end is required to retransmit the block. For example, assuming 500 blocks of data are transmitted, where 499 blocks reply ACKs and 1 block replies NACKs, the BLER is 1/500=0.002×100% =0.2%.

5. SER (Symbol Error Rate, bit error rate) is an indicator of the accuracy of data transmission over a specified time period, bit error rate = 100% of the number of errors in transmission/total codes transmitted. In addition, bit error rate is defined as a measure of how often the bit error occurs. And the error rate research under specific conditions is carried out, so that the method has great significance in enhancing the performance of a wireless communication system and improving the data transmission quality.

6. HARQ (Hybrid Automatic Repeat Request ), which is a technique formed by combining forward error correction coding (FEC) and automatic repeat request (ARQ). And under the condition that the decoding fails, the receiver stores the received data and requests the sender to retransmit the data, and the receiver combines the retransmitted data with the previously received data and then decodes the data.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings, wherein it is apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The present application will be described in further detail with reference to the accompanying drawings.

Fig. 1 schematically illustrates a system architecture suitable for use in embodiments of the present application, as shown in fig. 1, in a future 5G system architecture, a user equipment 101 and a user equipment 102 may communicate with a core network device 104 via an access network entity 103, where the user equipment may refer to a UE, an access user equipment, a subscriber unit, a subscriber station, a mobile station, a remote user equipment, a mobile device, a user equipment, a wireless communication device, a user agent, or a user equipment. The access user equipment may be a cellular telephone, cordless telephone, session initiation protocol (Session Initiation Protocol, SIP) phone, wireless local loop (Wireless Local Loop, WLL) station, personal digital assistant (Personal Digital Assistant, PDA), handheld device with wireless communication capability, computing device or other processing device connected to a wireless modem, in-vehicle device, wearable device, user equipment in future 5G networks, etc. For convenience of description, only 2 pieces of user equipment are illustrated in fig. 1, and in an actual network, there may exist a plurality of pieces of user equipment that coexist, which is not described herein.

AN Access Network (AN) entity 103, which may also be referred to as a Radio Access Network (R) AN entity, hereinafter collectively referred to as AN Access Network entity or a R AN entity, is mainly responsible for providing wireless connection for the user equipment 101 and the user equipment 102, ensuring reliable transmission of uplink and downlink data between the user equipment 101 and the user equipment 102, and the like. The access network entity 103 may be a next generation base station (generation Node B, gNB) in a 5G system, may be a base station (Base Transceiver Station, BTS) in a global system for mobile communications (Global System of Mobile communication, GSM) or code division multiple access (Code Division Multiple Access, CDMA), may be a base station (NodeB, NB) in a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, may also be an evolved base station (Evolutional Node B, eNB or eNodeB) in a long term evolution (Long Term Evolution, LTE) system, or the like, and optionally, the access network entity in the embodiment of the present application is a satellite base station.

The core network device 104 is responsible for connecting the user equipment to different networks, charging, mobility management, etc. according to a call request or a data request sent by the user equipment through the access network. The core network device may be a 4G core network EPC (Evolved Packet Core ), or a 5G core network device.

The link between the ue 101 and the ue 102, which communicates with the core network device 104 through the access network entity 103, is a cellular communication link between the network and the ue, which may also be referred to as a uulink, and the corresponding interface is referred to as a Uu interface, while the link between the ue 101 and the ue 102, which communicates with the device and the device, is a direct communication link between the devices, which may also be referred to as a sidlink, and the corresponding wireless interface is referred to as a direct communication interface, which may also be referred to as a sidlink interface.

It should be noted that the above system architecture is merely an example of a system architecture applicable to the embodiments of the present application, and the system architecture applicable to the embodiments of the present application may further add other entities or reduce some entities compared to the system architecture shown in fig. 1.

The devices that are close to each other allow direct communication between the devices, and typical direct communication scenarios include the following three types:

1. one-to-one communication (also known as unicast) between direct communication devices;

2. a device may send the same data to all devices in a communication group at a time (also known as multicasting);

3. one device may send the same data (also called a broadcast) to all nearby devices at a time.

The following describes relevant background information for direct communication of two different systems:

description of direct communication related background of LTE system:

the devices in direct communication can be all on-line or off-line, or part of the devices can be on-line and part of the devices off-line. The device participating in direct communication in the network is located in the coverage of the communication carrier of the 3GPP base station, and the device participating in direct communication in the off-network is not located in the coverage of the communication carrier of the 3GPP base station.

It should be noted that, the direct communication scenario supported by the LTE system is broadcast only.

(II) direct communication-related background introduction of NR (New Radio) System:

unicast and multicast are introduced in the direct communication of the NR system, and feedback is introduced in the unicast and multicast, that is, the receiving end may feedback channel state information CSI (Channel State Information, CSI) and/or HARQ (Hybrid Automatic Repeat Request ) feedback information to the transmitting end.

In the carrier selection or carrier reselection mechanism of the related art, the reliability of service transmission is low and the mode is single.

In view of this, the present application provides a method for determining a carrier, the method being for direct communication with a second user equipment through a first user equipment; alternatively, the selection of the carrier is achieved by a network side device (e.g. a base station) for enabling the first user equipment to communicate with the second user equipment, or it is determined whether a reselection of the carrier is required.

The selection of carriers and carrier re-establishment in this application can take into account channel state changes, thereby combining the effects of channel state changes to select carriers or determine whether to trigger reselection.

For example, the first ue sends signal information to the second ue, and the second ue measures according to the received signal information to obtain the channel quality of the carrier.

In one possible implementation manner, the second ue sends the measured channel quality of the carrier to the first ue, so that the first ue performs carrier selection according to the channel quality of the carrier, or determines whether reselection of the carrier is required.

Another possible implementation manner is that the second ue performs carrier selection according to the channel quality of the carrier, or determines whether reselection of the carrier is required. Or the second user equipment sends the measurement result of the channel quality of the carrier to the network side equipment so that the network side equipment can select the carrier according to the channel quality of the carrier or determine whether the carrier needs to be reselected.

According to the embodiment, the second user equipment or the network side equipment sends the indication information to the first user equipment, so that the first user equipment selects the carrier according to the indication information or determines whether to reselect the carrier. Thereby providing a plurality of implementation modes for selecting the carrier or determining whether to reselect the carrier; and the carrier is selected according to the channel quality of the carrier, or whether the carrier is reselected or not is determined, so that the reliability is improved. In addition, the problem that the carrier selection and reselection modes are single in the prior art can be solved by selecting or reselecting the carrier through the indication of the indication equipment.

Wherein, the channel quality of the carrier wave comprises: channel state information of the carrier or HARQ information fed back by the second user equipment.

The channel state information includes one or a combination of the following information:

CSI (Channel State Information );

CQI (Channel Quality Indicator );

RI (Rand Indication, rank information);

SINR (Signal to Interference plus Noise Ratio );

RSRP (Reference Signal Receiving Power, reference signal received power);

RSRQ (Reference Signal Receiving Quality, reference signal received quality);

RSSI (Received Signal Strength Indication), received signal strength indication);

CR (Channel occupancy ratio, channel occupancy);

block error rate;

bit error rate;

SRS (Sounding Reference Signal ) information measured by the first user equipment.

The HARQ information includes at least one of the following instructions:

ACK (acknowledgement);

NACK (Negative ACKnowledge), error acknowledgement);

DTX (Discontinuous Transmission ).

The design ideas of the application are mainly divided into two parts:

one) since the selection carrier is split into two possible scenarios: and (5) carrier primary selection and carrier reselection. In the scenario of carrier reselection, the first user equipment has a carrier currently in use, so that it is required to specifically determine which carriers in the carriers currently in use belong to carriers needing to be reselected, thereby determining whether the carriers need to be reselected, and further selecting the carriers.

Second), the selection of the carrier is performed, which is applicable to both of the above two possible scenarios (carrier primary selection, carrier reselection).

Based on the design thought of the application, the technical method of the application will be described in two parts by combining the drawings, and the specific contents are as follows:

a first part: in the context of carrier reselection, it is determined whether a reselection of a carrier needs to be triggered.

In the carrier reselection scenario, determining whether carrier reselection is needed may be mainly determined by two types of manners:

it should be noted that the following two ways of whether to perform carrier reselection are merely examples, and do not limit the protection scope of the embodiments of the present application.

Mode one: the first user equipment determines whether carrier reselection is required according to the channel quality of the carrier.

Wherein, the channel quality of the carrier wave comprises: the first user equipment can determine whether to reselect the carrier according to the channel state information of the carrier or the HARQ information fed back by the second user equipment.

Furthermore, the second user equipment includes at least one user equipment, for example, 1 when unicast communication is between the direct communication terminals; when the direct communication is a multicast communication or a broadcast communication, the second user equipment may be plural. The number of second user equipments is not limited here.

(1) If the first user equipment determines whether to perform carrier reselection according to the channel state information of the carrier, when the first user equipment performs carrier reselection, the first user equipment may determine whether to perform carrier reselection according to a first comparison result of the channel state information of the carrier and a first threshold.

In the above embodiment, the channel state information includes one or a combination of the following information: CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, CR, block error rate, bit error rate, SRS measured by the first user equipment.

In implementation, the channel state information of the carrier may be that after the second ue receives the signal information sent by the first ue, the second ue measures the corresponding channel state information according to the signal information and obtains a measurement result, and then feeds back the measurement result of the channel state information to the first ue, for example CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI.

If necessary, the SRS information may be sent to the first user equipment through the second user equipment, so that the first user equipment performs a corresponding operation according to the SRS information, for example, the first user equipment determines whether to trigger carrier reselection according to the SRS information. Or select a carrier according to SRS information.

It should be noted that, since the information indicating the channel state information includes multiple types or combinations of multiple types, the first threshold described above does not represent a certain value, but only indicates the threshold for achieving the carrier reselection condition corresponding to each information type. For example, the values of different information types have different dimensions, because the different information types only have to meet the threshold of the corresponding carrier reselection condition.

The method comprises the steps that for different types of channel state information, a first user device determines whether a carrier reselection mode is different according to a first comparison result of the channel state information of a carrier and a first threshold:

1. the channel state information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI;

and after the first user equipment receives the measurement result of the second user equipment for the information, judging. When the method is implemented, if the channel state information of the carrier wave of the information is smaller than or equal to a first threshold corresponding to each piece of information, determining that the carrier wave needs to be reselected; and if the channel state information of the carrier wave of the information is larger than or equal to a first threshold corresponding to each piece of information, determining that the carrier wave does not need to be reselected.

It should be noted that, the processing manners of less than or equal to, greater than or equal to in the above embodiments are only one possible example, and are determined according to actual needs, and thus do not limit the embodiments of the present application. In addition, the processing manners of the embodiments described below that are smaller than or equal to, greater than or equal to are also one possible example, and may be determined according to actual needs, and are not limited to the embodiments of the present application, so they are not described in detail in the following embodiments.

For example, when CSI is used alone, the CSI may be compared to a corresponding threshold. When multiple channel state information is synthesized, for example, CSI and CQI are used, the comparison result of CSI and the corresponding first threshold and the comparison result of CQI and the corresponding first threshold can be determined respectively. If the comparison result of the CSI is lower than the corresponding threshold and the comparison result of the CQI is higher than the corresponding first threshold, determining that carrier reselection needs to be triggered according to the comparison result of the CSI. That is, when multiple channel state information is integrated, the various channel state information can be compared with the corresponding first threshold, and if any comparison result indicates that carrier reselection is required, it is determined that carrier reselection is required.

It should be noted that, when the channel state information adopted by the first thresholds is different, the values of the first thresholds corresponding to the channel state information may be different or the same, and may be determined according to actual requirements, which is not limited in the present application.

2. The channel state information comprises at least one of CR, block error rate and bit error rate;

and the second user equipment determines a measurement result of the channel state information and sends the measurement result to the first user equipment for judgment. When the method is implemented, if the channel state information of the carrier wave of the information is larger than or equal to a first threshold corresponding to each piece of information, determining that the carrier wave needs to be reselected; and if the channel state information of the carrier wave of the information is smaller than or equal to a first threshold corresponding to each piece of information, determining that the carrier wave does not need to be reselected.

Specifically, the first user equipment sends signal information to the second user equipment, and the second user equipment determines a measurement result of CR according to the received signal information; or the second user equipment determines the block error rate and the bit error rate of the carrier according to the received data packet of the signal information.

Or the second user equipment counts the number of NACK and/or the number of DTX, divides the counted result by the number of (ACK+NACK+DTX), and the obtained ratio is used as the block error rate and the bit error rate of the obtained carrier.

It should be noted that, if the block error rate and the bit error rate are selected as parameters of the channel state information, the second user equipment may count, for each first user equipment, the correctness and the errors of the first detected signal data packet sent by the received first user equipment within a preset duration, so as to obtain the block error rate and the bit error rate of the carrier corresponding to the first user equipment.

Or the second user equipment may also determine the block error rate and the bit error rate of the carrier by:

the first user equipment sends signal information to the second user equipment, the second user equipment carries out HARQ feedback to the first user equipment according to the received data packet of the signal information, the first user equipment determines the block error rate and the bit error rate of the carrier according to the HARQ feedback, and the first user equipment returns the determined block error rate and bit error rate to the second user equipment.

The first user equipment counts the number of NACK and/or the number of DTX, divides the counted result by the number of (ACK+NACK+DTX), and the obtained ratio is used as the block error rate and the bit error rate of the carrier.

After obtaining the block error rate and/or the bit error rate, it may be determined by the first user equipment itself or by an indication device (e.g. the second user equipment or the network side device) whether to trigger carrier reselection. In implementation, the method can be compared with a corresponding first threshold, and whether carrier reselection is triggered or not is determined according to a comparison result. For example, when the comparison result is greater than or equal to the first threshold, the carrier reselection is determined to be triggered, and when the comparison result is not less than or equal to the first threshold, the carrier reselection is not required to be triggered.

3. SRS measured by the first user equipment;

The SRS signal is used for the first user equipment to measure so as to obtain channel state information, so that the first user equipment determines whether carrier reselection is required according to the measured channel state information.

The determining manner of the first threshold in the foregoing embodiment may be configured in a manner of selecting configuration or a manner of selecting pre-configuration according to a state of the user equipment.

One possible implementation is to configure through a network; for example, for a user equipment in a connected state, the network may configure the first threshold through dedicated signaling; alternatively, for user equipment on the network, the network may configure the first threshold by broadcast signaling.

Another possible implementation manner is that, for the user equipment that is offline, the network may further configure the first threshold in a preconfigured manner; of course, for any state of user equipment, it may be configured in a preconfigured manner.

Further, the determination of the first threshold may also be related to traffic priority. For example, if the channel state information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, the higher the service priority, the smaller the first threshold corresponding to each information; if the channel state information comprises at least one of CR, block error rate and bit error rate; the higher the service priority, the larger the first threshold corresponding to each information; therefore, the service interruption caused by carrier reselection can be avoided as much as possible for the service with high priority.

(2) If the first user equipment determines whether carrier reselection is needed according to the HARQ information fed back by the second user equipment, determining a target value according to the HARQ information when the first user equipment is implemented; and determining whether carrier reselection is required according to a second comparison result of the target value and a second threshold.

In the above embodiment, the HARQ information includes at least one of the following instructions: ACK, NACK, DTX.

And the second user equipment feeds back the HARQ information according to the signal information after the first user equipment sends the signal information to the second user equipment in a similar way to the acquisition of the channel state information of the carrier wave.

For convenience of the following description, the designation information may be first defined as NACK and/or the DTX, or the designation information may be ACK.

In implementation, if the first user equipment and the second user equipment are transmitted through unicast communication, the target value is the number of the designated information in the HARQ information fed back by the second user equipment; or the target value is the ratio of the number of the specified information to the number of the fed-back HARQ information.

For example, the designated information is NACK and/or the DTX, and the target value is NACK and/or the number of the DTX in the HARQ information fed back by the second user equipment; determining that carrier reselection is required when the number of the received NACK and/or DTX is greater than or equal to a second threshold corresponding to the NACK and/or the DTX; and when the number of the received NACK and/or DTX is smaller than or equal to a second threshold value corresponding to the NACK and/or the DTX, determining that carrier reselection is not needed.

The second threshold is a carrier reselection threshold for judging whether to perform carrier reselection according to the HARQ information. The second threshold in this embodiment is similar to the first threshold, and when the adopted specified information is different, the value of the second threshold corresponding to each specified information may be different or the same, and may be determined according to the actual requirement, which is not limited in this application.

Or if the specified information is ACK, and the target value is the ratio of the number of ACK and the number of the fed-back HARQ information, determining that carrier reselection is required when the total number of the received ACK and the fed-back HARQ information is smaller than or equal to a second threshold corresponding to the ACK; and when the total number of the received ACK and the fed-back HARQ information is greater than or equal to a second threshold corresponding to the ACK, determining that carrier reselection is not needed.

If the first user equipment and the second user equipment perform data transmission through multicast or broadcast communication, the target value is the ratio of the number of the designated information in the HARQ information fed back by the second user equipment to the number of the fed-back HARQ information; or if the first user equipment and the second user equipment perform data transmission through multicast communication, the target value is the ratio of the number of the specified information to the number of the second user equipment in multicast.

For example, if the designated information is NACK and/or DTX, the target value is a ratio of the number of NACKs and/or DTX in the HARQ information fed back by the second user equipment to the number of HARQ information fed back, and when the ratio of the number of NACKs and/or DTX received to the number of HARQ information fed back is greater than or equal to a second threshold corresponding to NACK and/or DTX, it is determined that carrier reselection is required; and when the ratio of the number of received NACK and/or DTX to the number of fed-back HARQ information is smaller than or equal to a second threshold corresponding to NACK and/or DTX, determining that carrier reselection is not needed.

In the above manner, for example, the number of received NACKs is 5, the number of DTX is 1, and the total number of the number of HARQ information is 10, then several results that may exist for the target value include: 5/10, 1/10, 6/10 (where 6 is the number of NACKs 5+the number of DTXs 1). After determining the ratio, the ratio is compared to its corresponding second threshold. Wherein the corresponding second thresholds may be the same or different.

Similarly, the second threshold in this embodiment is similar to the determination manner of the first threshold, and may be configured in a manner that the network selects to configure according to the state of the ue or in a manner that the network selects to configure in advance, which is not described herein.

Furthermore, the determination of the second threshold may also be related to traffic priority. For example, if the specified information is NACK and/or DTX, the higher the service priority, the greater the second threshold corresponding to NACK and/or DTX; if the designated information is ACK, the higher the service priority is, the smaller the second threshold corresponding to the ACK is. Thus, the service with high priority can be ensured to avoid the need of carrier reselection as much as possible, because the carrier reselection can cause the service to be interrupted for a period of time.

Referring to fig. 2, a timing chart of a method for determining a carrier according to an embodiment of the present application includes:

step 201: and transmitting the signal information or the data packet to the second user equipment.

If the first user equipment determines whether carrier reselection is required according to the channel state information, the first user equipment sends signal information to the second user equipment; or if the first user equipment determines whether carrier reselection is required according to the HARQ information, the first user equipment sends a data packet to the second user equipment.

Step 202: and receiving channel state information or HARQ information fed back by the second user equipment.

Step 203: and judging whether carrier reselection is needed according to the threshold.

Step 204: and determining whether to perform carrier reselection according to the judgment result.

Mode two: the first user equipment determines whether carrier wave retransmission is needed according to the indication information of the indication equipment Selecting。

The indication device is network side equipment accessed by the first user equipment or second user equipment communicated with the first user equipment. The indication information includes: indication information for indicating whether or not a currently used carrier needs carrier reselection; or, carrier reselection identification information for indicating that carrier reselection is required.

For example, after judging the carriers currently being used one by one, the indicating device sends the judging results of all the carriers to the first user device, and the first user device can determine whether each selected carrier needs to perform the carrier reselection result according to the indicating information, so as to execute the next action; or, includes a carrier reselection identifier that requires carrier reselection.

For example, if the indication device determines for each carrier currently being used, and then sends the carrier identifier that needs to be reselected in the currently used carriers to the first user device, after the first user device receives the indication information, it may be determined that only the carrier corresponding to the received carrier identifier needs to be reselected, and the carrier that does not correspond to the carrier identifier does not need to be reselected and may be continuously used.

Further, after the first user equipment determines the carrier needing to be reselected according to the indication information or the carrier identifier; the transmission of the service message to the at least one second user equipment based on the carrier that needs to be reselected is stopped.

(1) If the indication equipment is the second user equipment, the second user equipment can determine whether carrier reselection is required according to channel state information of the carrier or according to the determined HARQ information, and then notify the indication information to the first user equipment, so that the first user equipment determines whether carrier reselection is required.

In addition, the second ue determines whether to perform carrier reselection according to the channel state information of the carrier or according to the determined HARQ information, and the specific determining manner is a specific embodiment of determining whether to perform carrier reselection in the first mode, which is not described herein again.

The indication information of the second ue may be signaled by SL RRC (sidelink Radio Resource Contro, through link medium access control) or SL MAC CE (sidelink MAC Control Element, through link medium access layer control unit), or the like.

In one embodiment, if the SL RRC signaling is notified, the SL RRC signaling may include an indication IE (information element ) for indicating to the first ue whether carrier reselection is required, such as the carrier identification described above. Further, the SL RRC message further includes one or more of source L2ID (source layer L2 identifier), destination L2ID (destination L2 identifier), SLRB ID (direct link radio bearer SLRB identifier), or LCID (logical channel identifier LCID), so as to distinguish that the SL RRC signaling is sent by the second user equipment to the first user equipment.

Further, the SL RRC signaling optionally further includes a carrier ID, which is used as the indication information in the foregoing to indicate whether the currently used carrier needs to perform carrier reselection. A 1 bit may be set for each carrier, for example, a carrier ID that needs to be subjected to carrier reselection is set to 0, and a carrier ID that does not need to be subjected to carrier reselection is set to 1, thereby indicating which carrier needs to be subjected to carrier reselection for the first user equipment.

In another embodiment, if signaled by SL MAC CE signaling, the SL MAC CE signaling is used to instruct the first user equipment to determine whether carrier reselection is required. The SL MAC CE signaling further includes one or more of a source L2ID, a destination L2ID, an SLRB ID, or an LCID, for distinguishing that the SL MAC CE message is sent by the second user equipment to the first user equipment.

Further, the SL MAC CE message may optionally include a carrier ID, which is used as the indication information for indicating whether the currently used carrier needs to perform carrier reselection. A 1 bit may be set for each carrier, for example, a carrier ID that needs to be subjected to carrier reselection is set to 0, and a carrier ID that does not need to be subjected to carrier reselection is set to 1, thereby indicating which carrier needs to be subjected to carrier reselection for the first user equipment.

Referring to fig. 3, a timing chart of a method for determining a carrier according to a second embodiment of the present application includes:

step 301: the first user equipment sends signal information or data packets to the second user equipment.

Step 302: and the second user equipment judges whether carrier reselection is required according to the threshold.

If the second user equipment receives the signal information of the first user equipment, determining a measurement result of the channel state information according to the signal information; or if the second user equipment receives the data packet of the first user equipment, determining the HARQ information needing to be fed back according to the data packet. Then, it is determined whether carrier reselection is required according to channel state information or HARQ information.

Step 303: the first user equipment receives the indication information sent by the second user equipment.

The indication information is used for indicating whether the first user equipment needs to perform carrier reselection or not.

Step 304: and the first user equipment determines whether to perform carrier reselection according to the indication information.

(2) If the indication device is a network side device, such as a base station, the network side device notifies the indication information to the first user device after determining whether carrier reselection is required, so that the first user device determines whether carrier reselection is required.

In addition, in one embodiment, the network side device determines whether carrier reselection is required according to channel state information of the carrier sent by the second user equipment or fed-back HARQ information; in another embodiment, the network side device sends the measurement result of the SRS sent by the first user equipment to the network side device according to the channel state information of the carrier wave or the fed-back HARQ information received by the first user equipment. In addition, the specific manner of determining whether to perform carrier reselection is as in the first embodiment, and a specific embodiment of determining whether to perform carrier reselection is not described herein.

The information carried by the indication information is the information carried by the second ue, and is not described herein.

The indication information of the network side device may be signaled by RRC, MAC CE, or the like.

In one embodiment, if the RRC signaling is notified, the RRC signaling may include an indication IE for indicating whether the first ue needs to perform carrier reselection, such as the carrier identification described above. Further, the RRC message further includes one or more of a source L2ID, a destination L2ID, an SLRB ID, or an LCID, so as to distinguish that the RRC message is sent by the network side device to the first user equipment.

Further, the RRC signaling optionally further includes a carrier ID, for example, the indication information in the foregoing description, which is used to indicate whether the currently used carrier needs to perform carrier reselection. A 1 bit may be set for each carrier, for example, a carrier ID that needs to be subjected to carrier reselection is set to 0, and a carrier ID that does not need to be subjected to carrier reselection is set to 1, thereby indicating which carrier needs to be subjected to carrier reselection for the first user equipment.

In another embodiment, if the first ue is signaled by a MAC CE, the MAC CE is configured to indicate whether the first ue needs to perform carrier reselection. The MAC CE message further includes: one or more of source L2ID, destination L2ID, SLRB ID or LCID is used for distinguishing the MAC CE message sent to the first user equipment by the network side equipment.

Further, the MAC CE message optionally further includes a carrier ID, for example, the indication information in the foregoing description, which is used to indicate whether the currently used carrier needs to perform carrier reselection. A 1 bit may be set for each carrier, for example, a carrier ID that needs to be subjected to carrier reselection is set to 0, and a carrier ID that does not need to be subjected to carrier reselection is set to 1, thereby indicating which carrier needs to be subjected to carrier reselection for the first user equipment.

Referring to fig. 4, another timing chart of a method for determining a carrier according to the second embodiment of the present application includes:

step 401: the first user equipment sends signal information or data packets to the second user equipment.

Step 402: the second user equipment feeds back channel state information or HARQ information to the network side equipment.

If the second user equipment receives the signal information of the first user equipment, determining a measurement result of the channel state information according to the signal information; or if the second user equipment receives the data packet of the first user equipment, determining the HARQ information needing to be fed back according to the data packet. And then, the second user equipment transmits the determined corresponding information to the network side equipment.

Step 403: and the network side equipment judges whether carrier reselection is required according to the threshold.

Step 404: the network side equipment sends indication information to the first user equipment.

Step 405: and the first user equipment determines whether to perform carrier reselection according to the indication information.

A second part: with respect to carrier selection during carrier reselection or carrier reselection.

After the carrier reselection is performed or the carrier reselection is determined, referring to fig. 5, a flow chart of a method for determining a carrier provided in an embodiment of the present application is shown, which includes:

s501: the first user equipment selects at least one carrier for communication with at least one second user equipment according to the channel quality of the carrier or according to the indication information of the indication equipment;

In one embodiment, at carrier initial selection, the first user equipment selects at least one carrier for communication with at least one second user equipment;

in another embodiment, the first user equipment selects at least one carrier for communication with at least one second user equipment upon carrier reselection.

In specific implementation, candidate carriers are firstly determined; at least one carrier is then selected from the candidate carriers for communication with at least one second user equipment.

The implementation mode of determining the candidate carrier is to determine whether the carrier is used as the candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold; or the first user equipment determines the candidate carrier according to the identification of the candidate carrier carried in the indication information.

Mode one: an embodiment of determining candidate carriers is based on a third comparison of the channel quality of the carrier with a third threshold As a result, it is determined whether the carrier is a candidate carrier。

(1) And if the first user equipment determines the candidate carrier according to the channel state information of the carrier.

When the method is implemented according to different types of channel state information, different implementation modes of candidate carriers are determined according to a third comparison result of the channel state information of the carrier and a third threshold:

and after the first user equipment receives the measurement result of the second user equipment for the information, judging. When the method is implemented, if the channel state information of the carrier wave of the information is larger than or equal to a third threshold corresponding to each piece of information, determining the carrier wave as a candidate carrier wave; and if the channel state information of the carrier wave of the information is smaller than or equal to a third threshold corresponding to each piece of information, determining that the carrier wave is not used as a candidate carrier wave.

For example, in one embodiment, when a candidate carrier is determined according to a measurement result of channel state information, if CSI is used, it is determined that the candidate carrier is available when CSI is greater than a third threshold, and otherwise, it is determined that the candidate carrier is not available when CSI is less than or equal to the third threshold.

In another embodiment, when determining the candidate carrier according to the multiple channel state information, each channel state information may be compared with a corresponding third threshold, and then the candidate carrier is determined according to the comparison result, which may be implemented as:

1) And when the comparison result of the plurality of channel state information is the candidate carrier, determining that the channel state information can be used as the candidate carrier, otherwise, determining that the channel state information cannot be used as the candidate carrier.

2) And if the comparison result of the channel state information of the plurality is not available as the candidate carrier, determining that the carrier cannot be used as the candidate carrier.

3) As long as one of the channel state information comparison results in the candidate carrier, the candidate carrier is determined.

4) If the result of the comparison of one information state information is that the carrier cannot be used as a candidate carrier, the carrier cannot be used as a candidate carrier is determined.

In specific implementation, the candidate carrier may be determined by determining what mode is selected according to actual requirements, which is not limited in this application.

It should be noted that, in the third threshold of the present embodiment, similar to the first threshold, when the adopted specified information is different, the value of the third threshold corresponding to each specified information may be different or the same, and may be determined according to the actual requirement, which is not limited in this application.

and the second user equipment determines a measurement result of the channel state information and sends the measurement result to the first user equipment for judgment. When the method is implemented, if the channel state information of the carrier wave of the information is smaller than or equal to a third threshold corresponding to each piece of information, determining the carrier wave as a candidate carrier wave; and if the channel state information of the carrier wave of the information is larger than or equal to a third threshold corresponding to each piece of information, determining that the carrier wave is not used as a candidate carrier wave.

The block error rate and the bit error rate are determined in the same manner as in the embodiment of determining whether to perform carrier reselection according to the block error rate and the bit error rate, and are not described herein.

3. SRS measured by the first user equipment;

the SRS signal is used for the first user equipment to measure so as to obtain channel state information, so that the first user equipment determines candidate carriers according to the measured channel state information. The specific embodiment is similar to the embodiment of determining the candidate carrier including at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI in the above-mentioned channel state information, and will not be described herein.

In an embodiment, the third threshold in the foregoing embodiment is similar to the determination manner of the first threshold or the second threshold, for example, the third threshold may be determined by a network side configuration or a pre-configuration manner, and the specific configuration manner is not described herein.

Furthermore, the determination of the third threshold may also be related to traffic priority. For example, if the channel state information includes at least one of CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, the higher the service priority, the smaller the third threshold corresponding to each information; if the channel state information comprises at least one of CR, block error rate and bit error rate; the higher the service priority, the larger the first threshold corresponding to each information; thus, it can be ensured that the service with high priority can have more optional candidate carriers.

And if there are a plurality of determined candidate carriers, optionally, selecting at least one carrier according to the order of the channel quality of the candidate carriers. In practice, for example, the candidate carriers are ordered in order of higher to lower channel quality, and then at least one carrier is selected.

In one possible implementation, when the channel quality information includes multiple parameters (for example, the channel quality includes CSI, CQI, RI, SINR, RSRP, RSRQ, RSSI, CR, the block error rate, and multiple information in the bit error rate), different weights may be assigned to each parameter, and summation is performed according to the weights corresponding to each parameter. And sorting according to channel quality according to the summed weight values, thereby selecting candidate carriers. Another possible implementation is to sort according to the direct addition of the channel quality of each information, and then select the candidate carriers.

When the carriers are initially selected, the first user equipment can select the number of the carriers according to the own service requirement and combining the number of the candidate carriers. When the carrier is reselected, the first user equipment can select the number of carriers according to the number of carriers reselected on the carrier in combination with the number of candidate carriers and even further in combination with the service requirement of the first user equipment.

(2) If the first user equipment determines candidate carriers according to the HARQ information fed back by the second user equipment, determining a target value according to the HARQ information when implementing the candidate carriers; and determining candidate carriers according to a fourth comparison result of the target value and a fourth threshold.

In the above embodiment, the HARQ information includes at least one of the following instruction information: ACK, NACK, DTX.

In implementation, the determination mode of the target value is the same as that of the previous, if the first user equipment and the second user equipment are transmitted through unicast communication, the target value is the number of the designated information in the HARQ information fed back by the second user equipment; or the target value is the ratio of the number of the specified information to the number of the fed-back HARQ information; wherein, the appointed information is NACK and/or DTX, or the appointed information is ACK.

For example, the designated information is NACK and/or the DTX, and the target value is NACK and/or the number of the DTX in the HARQ information fed back by the second user equipment; when the number of the received NACK and/or DTX is smaller than or equal to a fourth threshold corresponding to the NACK and/or DTX, determining the carrier as a candidate carrier; and when the number of the received NACK and/or DTX is greater than or equal to a fourth threshold corresponding to the NACK and/or the DTX, the carrier is not determined to be a candidate carrier.

Or the appointed information is ACK, the target value is the ratio of the number of ACK and the number of the fed-back HARQ information, and when the total number of the received ACK and the fed-back HARQ information is larger than or equal to a fourth threshold corresponding to the ACK, the carrier wave is determined to be a candidate carrier wave; and when the total number of the received ACK and the fed-back HARQ information is smaller than or equal to a fourth threshold corresponding to the ACK, the carrier is not determined to be a candidate carrier.

If the first user equipment and the second user equipment perform data transmission through multicast or broadcast communication, the target value is the ratio of the number of the designated information in the HARQ information fed back by the second user equipment to the number of the fed-back HARQ information; or if the first user equipment and the second user equipment perform data transmission through multicast communication, the target value is a ratio of the number of the specified information to the number of the second user equipment in multicast; wherein the specified information is NACK and/or DTX, or the specified information is ACK.

Note that, when the adopted HARQ information is different in the fourth threshold, the value of the fourth threshold corresponding to each HARQ information may be different or the same, and may be determined according to the actual requirement, which is not limited in this application.

Similarly, the fourth threshold in this embodiment is similar to the determination manner of the first threshold, and may be configured in a manner that the network selects to configure according to the state of the ue or in a manner that the network selects to configure in advance, which is not described herein.

Further, the determination of the fourth threshold may also be related to traffic priority. For example, if the specified information is NACK and/or DTX, the higher the service priority, the greater the fourth threshold corresponding to NACK and/or DTX; if the designated information is ACK, the higher the service priority is, the smaller the second threshold corresponding to the ACK is. Thus, it can be ensured that the service with high priority can have more optional candidate carriers.

When the carriers are initially selected, the first user equipment can select the number of the carriers according to the own service requirement and combining the number of the candidate carriers. When the carrier is reselected, the first user equipment can combine the number of candidate carriers in the carrier reselection and select the number of carriers according to the service requirement of the first user equipment.

Optionally, referring to fig. 2, a timing chart of a first mode of a method for determining a carrier according to an embodiment of the present application is provided, where step 203 may be performed as the following step 203' when carrier selection is performed; step 204 may be performed as follows step 204'; comprising the following steps:

Step 203': and selecting the carrier according to the threshold.

Step 204': and carrying out carrier selection.

Mode two: the first user equipment determines candidate carriers according to the identifiers of the candidate carriers carried in the indication information A wave.

The indication device is network side equipment accessed by the first user equipment or second user equipment communicated with the first user equipment. The indication information carries an identifier of a candidate carrier, and the candidate carrier identifier is used for enabling the first user equipment to determine the candidate carrier according to the candidate carrier identifier.

When the method is implemented, if the indication equipment is the second user equipment, after the candidate carrier is optionally determined according to the channel state information of the carrier or optionally according to the determined HARQ information, the second user equipment carries the determined identification of the candidate carrier in the indication information, and then notifies the indication information to the first user equipment.

In addition, the specific determining manner of the second ue determining the candidate carrier according to the channel state information of the carrier or according to the determined HARQ information is the same as the specific embodiment of determining the candidate carrier in the first embodiment, which is not described herein.

Similarly, the indication information of the second ue is signaled by the aforementioned SL RRC or SL MAC CE, and the detailed description thereof is omitted herein.

Referring to fig. 3, a timing diagram of a second mode of a carrier determining method according to an embodiment of the present application is provided, wherein step 302 may be performed as the following step 302' when carrier selection is performed; step 304 may be performed as follows step 304'; comprising the following steps:

step 301: the first user equipment sends signal information to or packets from the second user equipment.

Step 302': and the second user equipment performs carrier selection according to the threshold.

The indication information is used for indicating candidate carriers used for carrier selection by the first user equipment.

Step 304': the first user equipment performs carrier selection.

Or if the indication device is a network side device, such as a base station, the network side device generates indication information carrying the candidate carrier identifier after determining the candidate carrier, and then notifies the indication information to the first user device, so that the first user device determines the candidate carrier.

In addition, the network side device optionally determines the candidate carrier according to the channel state information of the carrier or the feedback information of the HARQ of the carrier sent by the second user equipment, and the specific determination manner is the specific embodiment of determining the candidate carrier in the first mode, which is not described herein again.

Similarly, the indication information of the network side device may be notified through signaling such as RRC or MAC CE, and detailed description thereof is omitted herein.

Referring to fig. 4, another timing chart of a second mode of the carrier determining method according to the embodiment of the present application is provided, wherein step 403 may be performed as the following step 403' when carrier selection is performed; step 405 may be performed as follows step 405'; comprising the following steps:

Step 403': and the network side equipment performs carrier selection according to the threshold.

Step 405': the first user equipment performs carrier selection.

If there are a plurality of candidate carriers, selection order information for the candidate carriers is generated on the pointing device, and the selection order information is carried in the pointing information.

Therefore, the instruction information includes: and the selection sequence information is used for indicating the first user equipment to select at least one carrier according to the channel quality sequence of the candidate carriers.

By means of the method, the first user equipment can optionally select the carrier wave and determine whether the carrier wave needs to be reselected or not through different implementation modes under the condition that the first user equipment is in direct communication with the second user equipment. The carrier selection is performed by introducing channel quality, that is, the change of the channel state can be considered during carrier selection, so that the reliability of service transmission between user equipment can be improved.

On the basis of the foregoing embodiments, an embodiment of the present application further provides a first user device, as shown in fig. 6, including: a processor 601, a memory 602, and a transceiver 603;

the memory 602 is configured to store computer instructions;

the processor 601 is configured to execute the computer instructions in the memory 602, and perform the following procedures: the first user equipment selects at least one carrier for communication with at least one second user equipment according to the channel quality of the carrier or according to the indication information of the indication equipment;

Based on the same inventive concept, the embodiment of the present application further provides a first ue, and since the principle of solving the problem of the first ue is similar to that of determining the carrier, implementation of the first ue may refer to implementation of the method, and repeated parts are not repeated.

In fig. 6, a bus architecture (represented by bus 600), the bus 600 may include any number of interconnected buses and bridges, with the bus 600 linking together various circuits, including one or more processors, as represented by general purpose processor 601, and memory, as represented by memory 602. Bus 600 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be described further herein. Bus interface 604 provides an interface between bus 600 and transceiver 603. The transceiver 603 may be one element or may be a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. For example: the transceiver 603 receives external data from other devices. The transceiver 603 is used for transmitting the data processed by the processor 601 to other devices. Depending on the nature of the computing system, a user interface 605 may also be provided, such as a keypad, display, speaker, microphone, joystick.

The processor 601 is responsible for managing the bus 600 and general processing, running a general-purpose operating system as previously described. And memory 602 may be used to store data used by processor 601 in performing operations.

Alternatively, the processor 601 may be a CPU (Central processing Unit), ASIC (Application Specific Integrated Circuit ), FPGA (Field-Programmable Gate Array, field programmable Gate array) or CPLD (Complex Programmable Logic Device ).

The processor 601 is specifically configured to select, when a carrier is initially selected, at least one carrier for communicating with at least one second user equipment by the first user equipment; or alternatively, the first and second heat exchangers may be,

The processor 601 is specifically configured to determine, according to indication information of the indication device, whether carrier reselection is required by the first user equipment; or,

The processor 601 is specifically configured to determine whether carrier reselection is required according to a first comparison result of the channel state information of the carrier and a first threshold.

The processor 601 is specifically configured to determine a target value according to the HARQ information;

The processor 601 is specifically configured to determine candidate carriers;

The processor 601 is specifically configured to determine whether the carrier is a candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold; or,

The processor 601 is specifically configured to select at least one carrier according to the order of channel quality of the candidate carriers.

Optionally, the indication information includes:

On the basis of the above embodiments, the embodiments of the present application further provide an indication device, as shown in fig. 7, including: a processor 701, a memory 702, and a transceiver 703;

the memory 702 is configured to store computer instructions;

the processor 701 is configured to execute the instructions in the memory 702, and perform the following procedures: the method comprises the steps that indication equipment sends indication information to first user equipment, wherein the indication information is used for indicating the first user equipment to select at least one carrier wave used for communicating with at least one second user equipment;

Based on the same inventive concept, the embodiment of the present application further provides an indication device, and since the principle of solving the problem by the base station is similar to that of determining the carrier, the implementation of the indication device may refer to the implementation of the method, and the repetition is not repeated.

In FIG. 7, a bus architecture (represented by bus 700), the bus 700 may include any number of interconnected buses and bridges, with the bus 700 linking together various circuits, including one or more processors, as represented by processor 701, and memory, as represented by memory 702. Bus 700 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., as are well known in the art and, therefore, will not be described further herein. Bus interface 704 provides an interface between bus 700 and transceiver 703. The transceiver 703 may be one element or may be a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 701 is transmitted over a wireless medium via the antenna 705, and further, the antenna 705 receives and transmits data to the processor 701.

The processor 701 is responsible for managing the bus 700 and general processing, and may provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 705 may be used to store data used by processor 701 in performing operations.

Alternatively, the processor 701 may be CPU, ASIC, FPGA or a CPLD.

The processor 701 is specifically configured to send, when a carrier is initially selected, indication information to a first user equipment by the indication device; or alternatively, the first and second heat exchangers may be,

The processor 701 is specifically configured to instruct the device to determine whether carrier reselection is required according to channel quality of a carrier;

The processor 701 is specifically configured to determine whether carrier reselection is required according to a first comparison result of the channel state information of the carrier and a first threshold.

The processor 701 is specifically configured to determine a target value according to the HARQ information;

The processor 701 is specifically configured to determine candidate carriers;

The processor 701 is specifically configured to determine whether the carrier is a candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold.

The processor 701 is specifically configured to sort channel qualities of candidate carriers in order from high to low, and generate selection order information.

Optionally, the indication information includes one of the following:

Fig. 8 is a carrier determining apparatus provided in an embodiment of the present application, where the apparatus includes:

a selecting unit 801, configured to select at least one carrier for communicating with at least one second user equipment according to channel quality of the carrier or according to indication information of the indication device by the first user equipment;

The selecting unit 801 is specifically configured to, when a carrier is initially selected, select at least one carrier for communication with at least one second user equipment by using the first user equipment; or alternatively, the first and second heat exchangers may be,

The selecting unit 801 is specifically configured to determine whether carrier reselection is required by the first user equipment according to indication information of the indication device; or,

The selecting unit 801 is specifically configured to determine whether carrier reselection is required according to a first comparison result of the channel state information of the carrier and a first threshold.

The selecting unit 801 is specifically configured to determine a target value according to the HARQ information;

The selecting unit 801 is specifically configured to determine candidate carriers;

The selecting unit 801 is specifically configured to determine whether the carrier is a candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold; or,

The selecting unit 801 is specifically configured to select at least one carrier according to the order of channel quality of the candidate carriers.

Optionally, the indication information includes:

Fig. 9 is a carrier determining device provided in an embodiment of the present application, which is applied to a network side device, where the device includes:

a sending unit 901, configured to instruct an apparatus to send indication information to a first user equipment, where the indication information is used to instruct the first user equipment to select at least one carrier for communicating with at least one second user equipment;

The sending unit 901 is specifically configured to send, when a carrier is initially selected, indication information to a first user equipment by using the indication device; or alternatively, the first and second heat exchangers may be,

The sending unit 901 is specifically configured to instruct the device to determine whether carrier reselection is required according to channel quality of a carrier;

The sending unit 901 is specifically configured to determine whether carrier reselection is required according to a first comparison result of the channel state information of the carrier and a first threshold.

The sending unit 901 is specifically configured to determine a target value according to the HARQ information;

determining candidate carriers;

The sending unit 901 is specifically configured to determine whether the carrier is a candidate carrier according to a third comparison result of the channel quality of the carrier and a third threshold.

The sending unit 901 is specifically configured to sort channel qualities of candidate carriers in order from high to low, and generate selection order information.

Optionally, the indication information includes one of the following:

On the basis of the above embodiments, the embodiments of the present application further provide a computer storage readable storage medium, where a computer program executable by a first user device or a pointing device is stored in the computer readable storage medium, and when the program runs on the first user device or the pointing device, the first user device or the pointing device is caused to execute, so that any one of the embodiments applied to the first user device or the pointing device is implemented.

The computer readable storage medium described above can be any available medium or data storage device that can be accessed by a processor in a base station, including but not limited to magnetic memories such as floppy disks, hard disks, magnetic tape, magneto-optical disks (MO), etc., optical memories such as CD, DVD, BD, HVD, etc., and semiconductor memories such as ROM, EPROM, EEPROM, nonvolatile memories (NAND FLASH), solid State Disks (SSD), etc.

For system/device embodiments, the description is relatively simple as it is substantially similar to method embodiments, with reference to the description of method embodiments in part.

It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.

While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims

1. A method of determining a carrier wave, the method comprising:

the selecting at least one carrier for communication with at least one second user equipment comprises:

at carrier initial selection, the first user equipment selects at least one carrier for communication with at least one second user equipment; or, upon carrier reselection, the first user equipment selects at least one carrier for communication with at least one second user equipment;

the carrier reselection is determined whether it is necessary by:

the first user equipment determines whether carrier reselection is needed according to the HARQ information fed back by the second user equipment;

The first user equipment determines whether carrier reselection is required according to the HARQ information fed back by the second user equipment, and the method comprises the following steps:

determining a target value according to the HARQ information; determining whether carrier reselection is required according to a second comparison result of the target value and a second threshold;

if the first user equipment and the second user equipment are transmitted through unicast communication, the target value is the number of the appointed information in the HARQ information fed back by the second user equipment; or the target value is the ratio of the number of the specified information to the number of the fed-back HARQ information; wherein, the appointed information is NACK and/or DTX, or the appointed information is ACK;

if the first user equipment and the second user equipment perform data transmission through broadcast communication, the target value is a ratio of the number of the designated information in the HARQ information fed back by the second user equipment to the number of the fed-back HARQ information;

if the first user equipment and the second user equipment perform data transmission through multicast communication, the target value is a ratio of the number of the designated information in the HARQ information fed back by the second user equipment to the number of the fed-back HARQ information; or the target value is the ratio of the number of the specified information to the number of the second user equipment in the multicast.

2. The method according to claim 1, wherein the method further comprises:

the first user equipment determines whether carrier reselection is required according to a first comparison result of the channel state information of the carrier and a first threshold; the channel state information includes at least one of the following parameters: channel State Information (CSI), channel Quality Indication (CQI), rank Information (RI), reference Signal Received Power (RSRP), reference Signal Received Quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), received Signal Strength Indication (RSSI), channel occupancy (CR), block Error Rate (BER), bit Error Rate (BER) and Sounding Reference Signal (SRS) information measured by the first user equipment.

3. The method of claim 1, wherein the HARQ information comprises at least one of: correct acknowledgement ACK, incorrect acknowledgement NACK, and discontinuous transmission DTX.

4. The method of claim 1, wherein the first user device selects at least one carrier for communication with at least one second user device, comprising:

determining candidate carriers;

5. The method of claim 4, wherein determining candidate carriers comprises:

6. The method of claim 4, wherein the first user device selecting at least one carrier from the candidate carriers comprises:

7. The method according to claim 4, wherein the indication information includes: and the selection sequence information is used for indicating the first user equipment to select at least one carrier according to the channel quality sequence of the candidate carriers.

8. The method according to claim 1, wherein the indication information includes:

9. A method of determining a carrier wave, the method comprising:

the indicating device sends indicating information to the first user device, including:

when a carrier is initially selected, the indicating equipment sends indicating information to first user equipment; or, when the carrier is reselected, the indication equipment sends indication information to the first user equipment;

the carrier reselection is determined whether it is necessary by:

the indicating equipment determines whether carrier reselection is needed according to the HARQ information fed back by the second user equipment;

the indication equipment is network side equipment accessed by the first user equipment or second user equipment communicated with the first user equipment;

the indicating device determines whether carrier reselection is required according to the HARQ information, and the method comprises the following steps:

If the first user equipment and the second user equipment are transmitted through unicast communication, the target value is the number of the designated information in the HARQ information; or, the target value is a ratio of the number of the specified information to the number of the HARQ information; wherein, the appointed information is NACK and/or DTX, or the appointed information is ACK;

10. The method according to claim 9, wherein the method further comprises:

and the indicating equipment determines whether carrier reselection is required according to a first comparison result of the channel state information of the carrier and a first threshold.

11. The method of claim 9, wherein the HARQ information comprises at least one of: correct acknowledgement ACK, incorrect acknowledgement NACK, and discontinuous transmission DTX.

12. The method of claim 9, wherein the indicating device sends the indication information to the first user device, comprising:

determining candidate carriers;

13. The method of claim 12, wherein determining candidate carriers comprises:

14. The method of claim 12, wherein the indicating device sends the indication information to the first user device, comprising:

15. The method according to claim 14, wherein the indication information includes: and the selection sequence information is used for indicating the first user equipment to select at least one carrier according to the channel quality sequence of the candidate carriers.

16. The method of claim 9, wherein the indication information includes one of:

17. A first user device, comprising: a processor, a memory, and a transceiver;

wherein the processor is configured to read the computer instructions in the memory, and execute:

The carrier reselection is determined whether it is necessary by:

18. A pointing device, comprising: a processor, a memory, and a transceiver;

the carrier reselection is determined whether it is necessary by:

19. A carrier wave determining apparatus, applied to a first user equipment, the apparatus comprising:

a selection unit for selecting at least one carrier for communication with at least one second user equipment according to a channel quality of the carrier or according to indication information of the indication device;

at the time of carrier initial selection, selecting at least one carrier for communication with at least one second user equipment; or, upon carrier reselection, selecting at least one carrier for communication with at least one second user equipment;

the selecting unit is further configured to determine whether carrier reselection is required by:

determining whether carrier reselection is needed according to the HARQ information fed back by the second user equipment;

determining whether carrier reselection is required according to the HARQ information fed back by the second user equipment, including:

20. The carrier wave determining device is characterized by being applied to indicating equipment, wherein the indicating equipment is network side equipment accessed by first user equipment or second user equipment communicated with the first user equipment; the device comprises:

a sending unit, configured to send indication information to a first user equipment, where the indication information is used to instruct the first user equipment to select at least one carrier for communicating with at least one second user equipment;

Transmitting indication information to first user equipment when a carrier is initially selected; or, when the carrier is reselected, sending indication information to the first user equipment;

the sending unit is further configured to determine whether carrier reselection is required by:

according to the HARQ information, determining whether carrier reselection is needed comprises:

21. A computer readable storage medium, characterized in that the storage medium stores computer instructions which, when executed by a processor, implement the method of any one of claims 1-16.