CN117499908A

CN117499908A - Relay discovery message processing method and device

Info

Publication number: CN117499908A
Application number: CN202210872092.7A
Authority: CN
Inventors: 翟海涛; 赵亚利; 徐昊; 张惠英
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2024-02-02

Abstract

The embodiment of the application provides a method and a device for processing a relay discovery message, wherein the method can be applied to a first terminal and comprises the following steps: the first terminal access layer receives a relay discovery message of a U2U relay type sent by a high layer; the first terminal access layer receives indication information sent by a high-level and/or second terminal; the first terminal access layer determines whether to transmit the relay discovery message based on the indication information. According to the method and the device for processing the relay discovery message, the first terminal access layer determines whether to send the relay discovery message according to the received indication information or the capability information of the first terminal, so that the problem of resource waste caused by the fact that the first terminal sends the unnecessary relay discovery message is avoided.

Description

Relay discovery message processing method and device

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for processing a relay discovery message.

Background

For the U2N relay discovery process, the triggering conditions for the remote terminal and the relay terminal to send the discovery signal all have corresponding access layer criteria. However, for U2U, on one hand, there is no Uu interface in the link, and both links of the relay are PC5 interfaces; on the other hand, both link entities of the relay are not fixed (one link of the relay is fixed as gNB in the case of U2N); therefore, the method of U2N cannot be directly used for U2U, and needs to be further enhanced.

Because the relay discovery process of the access layer does not disclose a scheme, the access layer cannot judge whether to send the relay discovery message, and therefore, the problem of resource waste caused by sending too many or unnecessary relay discovery messages in the U2U relay scene may occur.

Disclosure of Invention

Aiming at the problems existing in the prior art, the embodiment of the application provides a method and a device for processing a relay discovery message.

In a first aspect, an embodiment of the present application provides a method for processing a relay discovery message, which is applied to a first terminal, and includes:

the first terminal access layer receives a relay discovery message of a U2U relay type sent by a high layer;

the first terminal access layer receives indication information sent by a high-level and/or second terminal;

the first terminal access layer determines whether to transmit the relay discovery message based on the indication information.

Optionally, in the case that the indication information includes an L2 ID corresponding to the remote terminal, the first terminal access layer determines whether to send the relay discovery message based on the indication information, including:

the first terminal access layer determines the wireless channel quality corresponding to the measurement object based on the L2 ID corresponding to the remote terminal;

The first terminal access layer sends the relay discovery message under the condition that the wireless channel quality meets a preset threshold condition;

the first terminal access layer discards the relay discovery message under the condition that the wireless channel quality does not meet a preset threshold condition;

wherein the measurement object comprises any one or a combination of the following: the system comprises a source terminal, a target terminal, a potential relay terminal and a relay terminal connected with the first terminal at present.

Optionally, the wireless channel quality includes one or more of:

SD-RSRP；

SL-RSRP；

SD-RSRQ；

SL-RSRQ；

BLER；

number of HARQ retransmissions.

Optionally, the wireless channel quality includes any one or a combination of the following: in the case of SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ, and the first terminal is a source terminal, the threshold condition includes a first condition, the first condition being any one of or a combination of the following:

the quality of a wireless channel between the source terminal and the target terminal is lower than a first threshold;

the quality of a wireless channel between the source terminal and the currently connected relay terminal is lower than a second threshold;

and the wireless link failure occurs between the source terminal and the currently connected relay terminal.

Optionally, the wireless channel quality includes any one or a combination of the following: in the case where the SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ are relay terminals, the threshold condition includes a third condition, the third condition is any one of or a combination of the following:

The quality of the wireless channel between the relay terminal and the source terminal is lower than a third threshold;

the quality of a wireless channel between the relay terminal and the source terminal is higher than a fourth threshold;

the quality of the wireless channel between the relay terminal and the target terminal is lower than a fifth threshold;

the quality of a wireless channel between the relay terminal and the target terminal is higher than a sixth threshold;

wherein the third threshold is higher than the fourth threshold and the fifth threshold is higher than the sixth threshold.

Optionally, the wireless channel quality includes any one or a combination of the following: in the case where the SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ are target terminals, the threshold condition includes a fifth condition, the fifth condition being any one or a combination of the following:

the quality of the wireless channel between the target terminal and the source terminal is lower than a seventh threshold;

the quality of a wireless channel between the target terminal and the currently connected relay terminal is lower than an eighth threshold;

a radio link failure occurs between the target terminal and the currently connected relay terminal;

the quality of the wireless channel between the target terminal and the potential relay terminal is lower than a ninth threshold;

The quality of a wireless channel between the target terminal and the potential relay terminal is higher than a tenth threshold;

wherein the ninth threshold is higher than the tenth threshold.

Optionally, in a case where the radio channel quality includes a BLER and/or a number of HARQ retransmissions and the first terminal is a source terminal, the threshold condition includes a seventh condition, and the seventh condition is any one of or a combination of the following:

the quality of the wireless channel between the source terminal and the target terminal is higher than an eleventh threshold;

the quality of a wireless channel between the source terminal and the currently connected relay terminal is higher than a twelfth threshold;

Optionally, in a case where the radio channel quality includes a BLER and/or a number of HARQ retransmissions and the first terminal is a relay terminal, the threshold condition includes a ninth condition, the ninth condition is any one of or a combination of the following:

the quality of the wireless channel between the relay terminal and the source terminal is higher than a thirteenth threshold;

the quality of the wireless channel between the relay terminal and the source terminal is lower than a fourteenth threshold;

the quality of a wireless channel between the relay terminal and the target terminal is higher than a fifteenth threshold;

The quality of the wireless channel between the relay terminal and the target terminal is lower than a sixteenth threshold;

wherein the thirteenth threshold is lower than the fourteenth threshold and the fifteenth threshold is lower than the sixteenth threshold.

Optionally, in a case where the radio channel quality includes a BLER and/or a number of HARQ retransmissions and the first terminal is a target terminal, the threshold condition includes an eleventh condition, where the eleventh condition is any one or a combination of the following:

the quality of the wireless channel between the target terminal and the source terminal is higher than a seventeenth threshold;

the quality of a wireless channel between the target terminal and the currently connected relay terminal is higher than an eighteenth threshold;

the wireless channel quality between the target terminal and the potential relay terminal is lower than a nineteenth threshold;

the wireless channel quality between the target terminal and the potential relay terminal is higher than a twentieth threshold;

wherein the nineteenth threshold is lower than the twentieth threshold.

Optionally, in the case that the indication information includes a message type identifier, the first terminal access layer determines whether to send the relay discovery message based on the indication information, including:

Under the condition that the message type identifier indicates that the relay discovery message of the first terminal access layer is a relay discovery message of a U2U relay type, the first terminal access layer acquires CBR of a resource pool determined to be used for sending the relay discovery message;

and the first terminal access layer sends the relay discovery message under the condition that the CBR meets a preset threshold condition.

Optionally, the threshold condition includes: the CBR is below a twenty-first threshold.

Optionally, the threshold value in the threshold condition is a range interval formed by a base threshold and an offset.

Optionally, the method further comprises:

and when receiving the relay discovery message sent by a high layer, the first terminal access layer performs wireless channel quality measurement, filtering and measurement result report on a receiving link corresponding to the measurement object.

Optionally, in the case that the indication information includes a higher layer request message, the first terminal access layer determining whether to send the relay discovery message based on the indication information includes:

the first terminal access layer sends the relay discovery message based on the higher layer request message.

Optionally, the relay discovery message includes a discovery request message and/or a discovery response message.

Optionally, the time for the higher layer to send the indication information to the access layer includes any one of the following cases:

when submitting the relay discovery message to the access layer;

before submitting the relay discovery message to the access layer;

after submitting the relay discovery message to the access layer.

In a second aspect, an embodiment of the present application provides a method for processing a relay discovery message, which is applied to a first terminal, and includes:

the first terminal access layer determines whether to transmit the relay discovery message based on the capability information of the first terminal.

Optionally, the determining, by the first terminal access layer, whether to send the relay discovery message based on the capability information of the first terminal includes:

the first terminal access layer sends the relay discovery message under the condition that the first terminal supports a terminal-to-terminal relay service; and/or

And the first terminal access layer sends the relay discovery message under the condition that the first terminal supports dual connection.

In a third aspect, embodiments of the present application further provide a first terminal, including a memory, a transceiver, and a processor:

A memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and implementing the steps of the method for processing a relay discovery message as described in the first aspect.

In a fourth aspect, embodiments of the present application further provide a first terminal, including a memory, a transceiver, and a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and implementing the steps of the method for processing a relay discovery message as described in the second aspect.

In a fifth aspect, an embodiment of the present application further provides a processing device for relaying a discovery message, which is applied to a first terminal, including:

the first receiving unit is used for receiving the relay discovery message of the U2Urelay type sent by the high layer by the first terminal access layer;

the second receiving unit is used for receiving the indication information sent by the high-level and/or second terminal by the first terminal access layer;

and the first determining unit is used for determining whether to send the relay discovery message or not by the first terminal access layer based on the indication information.

In a sixth aspect, an embodiment of the present application further provides a processing device for relaying a discovery message, which is applied to a first terminal, including:

the third receiving unit is used for receiving the relay discovery message of the U2U relay type sent by the higher layer by the first terminal access layer;

and a second determining unit, configured to determine, by the first terminal access layer, whether to send the relay discovery message based on the capability information of the first terminal.

In a seventh aspect, embodiments of the present application further provide a processor-readable storage medium storing a computer program for causing the processor to execute the method for processing a relay discovery message according to the first aspect or the method for processing a relay discovery message according to the first aspect.

According to the method and the device for processing the relay discovery message, the first terminal access layer determines whether to send the relay discovery message according to the indication information or the capability information of the first terminal, so that the problem of resource waste caused by the fact that the first terminal sends the unnecessary relay discovery message is avoided. For example, the source terminal sends out a discovery request message for establishing a link to the target terminal, and the relay terminal sends a discovery response message to the source terminal in the case that the link cannot be established with the target terminal, but the source terminal cannot establish the link with the target terminal through the relay terminal or the quality of the established link is poor, the relay discovery request message sent by the relay terminal is unnecessary, and therefore, resource waste is caused by sending the relay discovery request message; in the embodiment of the application, the relay terminal can determine that the link cannot be established with the target terminal through the received indication information and/or the capability information of the relay terminal, and determine not to send the discovery response message to the source terminal, so that resource waste is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a communication manner of network centralized control provided in the present application;

FIG. 2 is a schematic illustration of a communication scheme for direct communication provided herein;

fig. 3 is a schematic diagram of a communication manner of a terminal-to-terminal relay U2U relay provided in the present application;

fig. 4 is a schematic diagram of a communication manner of a relay U2N relay from a terminal to a network device provided in the present application;

fig. 5 is one of flow diagrams of a processing method of a relay discovery message provided in an embodiment of the present application;

fig. 6 is a second flowchart of a method for processing a relay discovery message according to an embodiment of the present application;

fig. 7 is one of schematic structural diagrams of a processing apparatus for relaying discovery messages provided in an embodiment of the present application;

fig. 8 is a second schematic structural diagram of a processing device for relaying discovery messages according to an embodiment of the present disclosure;

Fig. 9 is one of schematic structural diagrams of a first terminal according to an embodiment of the present application;

fig. 10 is a second schematic structural diagram of the first terminal according to the embodiment of the present application.

Detailed Description

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.

The term "plurality" in the embodiments of the present application means two or more, and other adjectives are similar thereto.

The technical scheme provided by the embodiment of the application can be suitable for various systems, in particular to a 5G system. For example, suitable systems may be global system for mobile communications (global system of mobile communication, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) universal packet Radio service (general packet Radio service, GPRS), long term evolution (long term evolution, LTE), LTE frequency division duplex (frequency division duplex, FDD), LTE time division duplex (time division duplex, TDD), long term evolution-advanced (long term evolution advanced, LTE-a), universal mobile system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX), 5G New air interface (New Radio, NR), and the like. Terminal devices and network devices are included in these various systems. Core network parts such as evolved packet system (Evloved Packet System, EPS), 5G system (5 GS) etc. may also be included in the system.

The terminal device according to the embodiments of the present application may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem, etc. The names of the user equipments may also be different in different systems, e.g. in a 5G system the terminal equipment may be referred to as user equipment. The wireless terminal device may communicate with one or more Core Networks (CNs) via a radio access Network (Radio Access Network, RAN), which may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, e.g., portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with the radio access Network. Such as personal communication services (Personal Communication Service, PCS) phones, cordless phones, session initiation protocol (Session Initiated Protocol, SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital assistants (Personal Digital Assistant, PDAs), and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile), remote station (remote station), access point (access point), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user equipment (user device), and the embodiments of the present application are not limited.

The network device according to the embodiment of the present application may be a base station, where the base station may include a plurality of cells for providing services for a terminal. A base station may also be called an access point or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or other names, depending on the particular application. The network device may be operable to exchange received air frames with internet protocol (Internet Protocol, IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in a global system for mobile communications (Global System for Mobile communications, GSM) or code division multiple access (Code Division Multiple Access, CDMA), a network device (NodeB) in a wideband code division multiple access (Wide-band Code Division Multiple Access, WCDMA), an evolved network device (evolutional Node B, eNB or e-NodeB) in a long term evolution (long term evolution, LTE) system, a 5G base station (gNB) in a 5G network architecture (next generation system), a home evolved base station (Home evolved Node B, heNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like. In some network structures, the network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, 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.

To facilitate an understanding of the embodiments of the present application, the following terms or contexts are presented in connection with the embodiments of the present application:

fig. 1 is a schematic diagram of a communication mode of network centralized control provided in the present application, and referring to fig. 1, conventional wireless communication adopts a cellular network communication mode, that is, a terminal and network side equipment perform uplink and downlink data and control information transmission through a Uu interface.

Fig. 2 is a schematic diagram of a communication manner of direct communication provided in the present application, and referring to fig. 2, direct communication refers to a manner in which a neighboring terminal may perform data transmission over a direct communication link (also referred to as a sip link or a PC 5) in a short range. The wireless interface to which the sidlink link corresponds is referred to as a direct communication interface (also referred to as a sidlink interface or PC5 interface).

Fig. 3 is a schematic diagram of a communication manner of a terminal-to-terminal relay U2U relay provided in the present application, and referring to fig. 3, in order to extend network coverage of U2U, UE-to-UE relay (U2U relay for short) is introduced.

Fig. 4 is a schematic diagram of a communication manner of a terminal-to-Network device relay U2N relay provided in the present application, and in reference to fig. 4, a UE-to-Network relay is also introduced for extending Network coverage.

At present, the access layer may have information of wireless channel quality, but since the higher layer message cannot be decoded, the target L2 address of the relay discovery message is not known, and thus the obtained channel quality information cannot be associated with the L2 ID of the target UE, and whether to send the relay discovery message cannot be determined in the AS layer.

The embodiment of the application provides a method for processing a relay discovery message, which is used for solving the problem of resource waste caused by excessive or unnecessary relay discovery messages sent by a terminal possibly in a U2URelay scene.

The following describes in detail the processing method of the relay discovery message provided in the embodiment of the present application in combination with a plurality of embodiments.

Fig. 5 is one of flow diagrams of a method for processing a relay discovery message according to an embodiment of the present application, and referring to fig. 5, the method is applied to a first terminal, and includes:

Step 510, the first terminal access layer receives a U2U relay type relay discovery message sent by a higher layer;

specifically, the first terminal may be a Remote terminal (Remote UE) or a Relay terminal (Relay UE); the remote terminal, which may also be referred to as a relayed terminal, may include a Source terminal (Source UE) or a Target terminal (Target UE); the relay terminal may be a terminal having a relay function. The U2U relay type relay discovery message refers to a message for discovering a U2 relay type relay. Alternatively, the relay discovery message may include a discovery request message and a discovery response message. The discovery request message may be sent by a terminal that needs to establish a connection with the relay terminal or the remote terminal, and is used for discovering the terminal that needs to be connected; the discovery response message is a response message corresponding to the discovery request message. It should be understood that the first terminal higher layer can learn the type of the relay discovery message; when the relay discovery message does not carry a message type identifier or the access layer does not receive information indicating the message type of the relay discovery message, the first terminal access layer cannot know the type of the relay discovery message.

In step 520, the first terminal access layer receives the indication information sent by the higher layer and/or the second terminal.

Specifically, the indication information is used to indicate whether the first terminal sends the relay discovery message, and the indication information may include information related to a link, a higher layer request message, or a message type, which is an example for facilitating understanding of the present application, and the embodiment of the present application is not limited to this, where the information related to a link refers to information related to a target relay link, and the target relay link refers to a relay link that a sending end of the relay discovery request message wishes to construct. Illustratively, the first terminal access layer may determine a wireless channel quality corresponding to the link by obtaining information related to the link, thereby determining whether to transmit the relay discovery message based on the wireless channel quality.

The indication information may be sent by a higher layer of the first terminal to the first terminal access layer, or may be sent by the second terminal to the first terminal access layer. For example, in the case that the second terminal sends the indication information to the first terminal access layer, the indication information may be carried when the second terminal sends the discovery request message to the first terminal, or may be sent separately, and the first terminal determines whether to send the discovery response message to the second terminal according to the indication information. The indication information is information associated with the relay discovery message (e.g., may indicate what type the relay discovery message is and L2 ID of the Target UE), the relay discovery message belongs to a message to be air-interface transmitted. The two information are different, but the first terminal may know the association relationship between the two information (for example, the indication information may carry identification information), for example, it is known that the indication information 1 corresponds to the relay discovery message 1, and the indication information 2 corresponds to the relay discovery message 2.

For example, in case the first terminal is a source terminal, the indication information is sent to the access layer by a higher layer. After the first terminal access layer identifies, the first terminal access layer may distinguish (or add the content of the indication information to the relay discovery message of the access layer) in the message header of the access layer, so that the access layer of the peer (such as the relay terminal) may identify the content to be indicated through the received relay discovery message. If the second terminal sends a relay discovery request message to the first terminal, the access layer of the first terminal receives the relay discovery request message and obtains indication information (such as an L2 layer ID, a message type, and only the access layer participates in the process of obtaining the indication information) carried in the relay discovery request message, the access layer submits the relay discovery request message to a higher layer, the higher layer issues a relay discovery response message corresponding to the relay discovery request message, and the access layer determines whether to send the relay discovery response message according to the indication information, i.e. in the process, the access layer can learn that the indication information is associated with the relay discovery response message.

In step 530, the first terminal access layer determines whether to send the relay discovery message based on the indication information.

Optionally, the first terminal access layer may determine, based on the received indication information, whether to send a relay discovery message submitted by a higher layer to an air interface, and the air interface may be a PC5 air interface.

According to the method for processing the relay discovery message, the first terminal access layer determines whether to send the relay discovery message according to the received indication information, so that the problem of resource waste caused by the fact that the first terminal sends the unnecessary relay discovery message is avoided. Illustratively, the source terminal sends out a discovery request message for establishing a link to the target terminal, the relay terminal serves as a first terminal, and sends a discovery response message to the source terminal in the case that the link cannot be established with the target terminal, but the source terminal cannot establish the link with the target terminal through the relay terminal or the quality of the established link is poor, the relay discovery request message sent by the relay terminal is unnecessary, and therefore, resource waste is caused by sending the relay discovery request message; in the embodiment of the application, the access layer of the first terminal can determine that the link cannot be established with the target terminal through the received indication information and/or the capability information of the relay terminal, and determine that the discovery response message is not sent to the source terminal, so that resource waste is avoided.

Optionally, the indication information may include an L2 ID corresponding to the remote terminal. Specifically, the L2 ID is a Layer 2ID, which may also be referred to as a Layer 2ID or a two-Layer ID, and is used to identify a terminal identity in a U2U Relay process, and in the case that the first terminal access Layer receives the L2 ID corresponding to the remote terminal, it may be determined that the current Relay discovery type is a U2 ureelay type, so as to execute an access Layer criterion for sending a Relay discovery message of the U2U Relay type.

In the case that the indication information includes an L2 ID corresponding to the remote terminal, the first terminal access layer determining whether to send the relay discovery message based on the indication information includes:

specifically, the first terminal access layer may determine a relayed object in the target relay link through the L2 ID corresponding to the remote terminal, thereby determining a candidate relay link, determining a measurement object through the candidate relay link, and determining a wireless channel quality corresponding to the measurement object. The candidate relay link refers to a relay link that may be established, and the measurement object refers to a terminal that establishes a link with the first terminal among the candidate relay links. The quality of the radio channel corresponding to the measurement object may refer to the quality of the radio channel between the first terminal and the destination terminal (the terminal that ultimately wants to construct the link):

If the first terminal is a source terminal, obtaining an L2 ID of a target terminal, measuring the quality of a link corresponding to a final destination of message transmission, wherein the source terminal has the following complete links to the target terminal:

a. the source terminal directly reaches the target terminal;

b. the source terminal is connected to the currently connected relay terminal and then to the target terminal;

c. the source terminal to the potential relay terminal and then to the target terminal.

The source terminal can only measure the wireless channel quality of the directly connected terminal, namely can only measure the wireless link quality corresponding to the target terminal, the currently connected relay terminal and the potential relay terminal in three complete links of a.b.c.

If the first terminal is a relay terminal, obtaining the L2 IDs of the source terminal and the target terminal, measuring the quality of a link corresponding to a final destination of message transmission, wherein the source terminal has the following complete links to the target terminal: the source terminal is connected to the first terminal and then to the target terminal.

At this time, the relay terminal can only obtain the wireless channel quality of the two links from the source terminal and the target terminal respectively.

The case where the first terminal is a target terminal refers to, for example, the case where the first terminal is a source terminal.

Wherein the measurement object comprises any one or a combination of the following: the system comprises a source terminal, a target terminal, a potential relay terminal and a relay terminal connected with the first terminal at present. Illustratively, in the case that the first terminal is a relay terminal, the first terminal access layer receives the L2 ID of the source terminal and the L2 ID of the target terminal, and may determine a candidate relay link: the source terminal, the first terminal and the target terminal can measure the links corresponding to the source terminal and the target terminal respectively (namely, two links from the source terminal to the first terminal and from the first terminal to the target terminal) connected in the candidate relay links, and the wireless channel quality corresponding to the target terminal is obtained. Illustratively, in the case that the first terminal is the source terminal, the first terminal access layer receives the L2 ID of the target terminal, and may determine the candidate relay link: the source terminal, the candidate relay terminal and the target terminal can directly measure the link from the source terminal to the target terminal, and it is understood that the wireless link quality corresponding to the target terminal cannot be obtained under the condition that connection cannot be realized; in the case where a potential relay terminal exists, the link from the source terminal to the potential relay terminal, that is, the relay terminal that can be found, may be measured.

specifically, the preset threshold condition may be set according to a specific application scenario, and the specific numerical value of the threshold condition is not limited in the embodiment of the present application. The threshold condition may be obtained by reading system information, dedicated signaling, or pre-configuration, which are examples for facilitating understanding of the embodiments of the present application, and the embodiment of the present application does not limit the obtaining manner of the threshold condition.

According to the method for processing the relay discovery message, the access layer establishes a connection between the wireless channel quality information owned by the access layer and the L2 ID of the remote terminal by obtaining the L2 ID of the remote terminal, so that the access layer can judge whether to send the relay discovery message submitted by a high layer or not by combining the wireless channel quality, and resource waste is avoided.

Optionally, the wireless channel quality includes one or more of:

SD-RSRP；

SL-RSRP；

SD-RSRQ；

SL-RSRQ；

BLER；

number of HARQ retransmissions.

Specifically, SL denotes measurements made over the data channel, SD denotes measurements made over the discovery channel, RSRP (Reference Signal Receiving Power, reference signal received power) denotes the average of the signal powers received on all REs (resource elements) carrying reference signals within a certain symbol, RSRQ (Reference Signal Receiving Quality, reference signal received quality) denotes the reference signal received quality, reflecting and indicating the signal-to-noise ratio and interference level of the current channel quality; the SD-RSRP refers to reference signal received power obtained by measuring a data channel, the SL-RSRP refers to reference signal received power obtained by measuring a discovery channel, the SD-RSRQ refers to reference signal received quality obtained by measuring a data channel, the SL-RSRQ refers to reference signal received quality obtained by measuring a discovery channel, the BLER (block error rate) refers to error probability of a transport block after CRC check, and the HARQ (Hybrid Automatic Repeat Request ) number of retransmissions refers to number of automatic retransmissions.

It will be appreciated that the higher the values of SD-RSRP, SL-RSRP, SD-RSRQ and SL-RSRQ, the better the transmission of the wireless channel. In the case that the wireless channel quality satisfies the above three conditions, it means that the first terminal, which is the source terminal, cannot establish a reliable link with the target terminal or cannot establish a reliable link with the target terminal through the currently connected relay terminal, and needs to establish a connection with a new relay terminal, thereby establishing a new relay link connected with the target terminal.

Optionally, the method further comprises: in the case that the wireless channel quality is determined not to meet the first condition, the first terminal access layer determines whether a second condition is met;

under the condition that the second condition is met, the first terminal access layer determines that the wireless channel quality meets a preset threshold condition;

the second condition includes any one or a combination of the following:

the first threshold is not configured;

The second threshold is not configured.

It should be understood that, in the case that the first threshold or the second threshold is not configured, the access layer may determine that the preset threshold condition is not met, so that the relay discovery message is not sent, and therefore, there may be a case that the relay discovery message should be sent, and by setting the second condition, the processing method for the relay discovery message provided in the embodiment of the present application avoids the condition that the relay discovery message is missed.

Specifically, for the quality of the wireless channel between the relay terminal and the source terminal being lower than the third threshold, it means that there is no problem of excessively high link quality between the relay terminal and the source terminal. If the communication quality between the relay terminal and the source terminal is too high, there may be a case where the relay terminal is too close to the source terminal, in which case the source terminal may be directly connected to the target terminal without establishing a link through the relay terminal.

Specifically, for the quality of the wireless channel between the relay terminal and the source terminal being higher than the fourth threshold, it means that the link quality between the relay terminal and the source terminal is not too low. In case the radio channel quality is below the fourth threshold, there may be a case where the communication quality is poor.

For the case that the quality of the wireless channel between the relay terminal and the target terminal is lower than the fifth threshold and the quality of the wireless channel between the relay terminal and the target terminal is higher than the sixth threshold, reference is made to the description of the third threshold and the fourth threshold, and the description is not repeated here.

Optionally, the method further comprises: in the case that the wireless channel quality is determined not to meet the third condition, the first terminal access layer determines whether a fourth condition is met;

Under the condition that the fourth condition is met, the first terminal access layer determines that the wireless channel quality meets a preset threshold condition;

the fourth condition includes any one or a combination of the following:

the third threshold is not configured;

the fourth threshold is not configured;

the wireless channel quality between the relay terminal and the target terminal is not stored.

Specifically, for the case where the third threshold and the fourth threshold are not configured, reference is made to the description of the first threshold and the second threshold that are not configured, which are not described herein.

For the case that the wireless channel quality between the relay terminal and the target terminal is not stored, it should be understood that, since the target terminal is the receiving party, the relay terminal cannot obtain the wireless channel quality between the relay terminal and the target terminal when the relay terminal has not been connected to the target terminal before and the wireless channel quality between the relay terminal and the target terminal is stored, so that in order to avoid the case that the relay discovery message is not transmitted, the wireless channel quality between the relay terminal and the target terminal is not stored, which may be regarded as meeting the preset threshold condition.

wherein the ninth threshold is higher than the tenth threshold.

Specifically, for the quality of the wireless channel between the target terminal and the source terminal being lower than the seventh threshold, the quality of the wireless channel between the target terminal and the currently connected relay terminal being lower than the eighth threshold, or the wireless link failure occurring between the target terminal and the currently connected relay terminal, it means that the first terminal as the target terminal cannot establish a reliable link with the source terminal or cannot establish a reliable link with the source terminal through the currently connected relay terminal, and needs to establish a connection with a new relay terminal, thereby establishing a new relay link connected with the source terminal. And thus requires the transmission of a relay discovery message.

For the situation that the quality of the wireless channel between the target terminal and the potential relay terminal is lower than the ninth threshold and/or the quality of the wireless channel between the target terminal and the potential relay terminal is higher than the tenth threshold, it means that the quality of the wireless channel between the target terminal and the potential relay terminal is not too high and/or too low, the relay discovery message may be sent. For too high and too low an explanation, reference is made to the above description and will not be repeated here.

Optionally, the method further comprises: in the case that the wireless channel quality is determined not to meet the fifth condition, the first terminal access layer determines whether a sixth condition is met;

under the condition that the sixth condition is met, the first terminal access layer determines that the wireless channel quality meets a preset threshold condition;

the sixth condition includes any one or a combination of the following:

a seventh threshold is not configured;

the eighth threshold is not configured;

a ninth threshold is not configured;

the tenth threshold is not configured.

Specifically, for the case where the seventh threshold is not configured, the eighth threshold is not configured, the ninth threshold is not configured, or the tenth threshold is not configured, reference is made to the description of the first threshold that is not configured and the second threshold that is not configured, which is not described herein.

Optionally, the method further comprises: in the case that the wireless channel quality is determined not to meet the seventh condition, the first terminal access layer determines whether an eighth condition is met;

under the condition that the eighth condition is met, the first terminal access layer determines that the wireless channel quality meets a preset threshold condition;

the eighth condition includes any one or a combination of the following:

the eleventh threshold is not configured;

the twelfth threshold is not configured.

Optionally, the method further comprises: in the case that the wireless channel quality is determined not to meet the ninth condition, the first terminal access layer determines whether a tenth condition is met;

under the condition that the tenth condition is met, the first terminal access layer determines that the wireless channel quality meets a preset threshold condition;

the tenth condition includes any one or a combination of the following:

the thirteenth threshold is not configured;

a fourteenth threshold is not configured;

wherein the nineteenth threshold is lower than the twentieth threshold.

Optionally, the method further comprises: in the case that the wireless channel quality is determined not to meet the eleventh condition, the first terminal access layer determines whether a twelfth condition is met;

under the condition that the twelfth condition is met, the first terminal access layer determines that the wireless channel quality meets a preset threshold condition;

the twelfth condition includes any one or a combination of the following:

a seventeenth threshold is not configured;

an eighteenth threshold is not configured;

a nineteenth threshold is not configured;

the twentieth threshold is not configured.

It should be understood that, in the case where the wireless channel quality is SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ, the higher the value, the better the transmission effect of the wireless channel; for the description of the threshold condition in the case where the radio channel quality includes the BLER and/or the HARQ retransmission number, reference may be made to the description in the case where the radio channel quality is SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ, which are not repeated here.

Specifically, the message type identification is used to indicate whether a U2N relay discovery message or a U2U relay discovery message. The access layer can learn the message type of the relay discovery message to be transmitted (the relay discovery message transmitted by the higher layer) through the message type identification. The resource pool refers to a set of time and frequency resources for transmission of a relay discovery message in a discovery and selection process of a relay terminal device, which may be shared by a plurality of terminal devices. CBR (Channel Busy Rate ) is used to measure the channel congestion level. In case that the indication information includes a relay discovery message of a message type and the message type is a U2U relay type, it may be determined whether to transmit the relay discovery message according to CBR.

Specifically, the CBR being below the twenty-first threshold indicates that there are time-frequency resources in the resource pool for transmitting the relay discovery message.

It should be understood that the embodiments of the present application do not limit the threshold specific value settings of the first threshold to the twenty-first threshold.

Optionally, the threshold value in the threshold condition is a range interval formed by a base threshold and an offset. Illustratively, the base threshold is 3, the offset is 0.3, and the range interval constructed may be [2.7,3.3].

According to the processing method of the relay discovery message, the ping-pong effect is avoided by setting the threshold value as a range interval.

Optionally, the method further comprises:

The description of the measurement object is described above, and will not be repeated here.

The filtering may be performed by averaging at least one initial result of the wireless channel quality measurement to obtain a final wireless channel quality.

The measurement result report refers to an inter-layer report of the access layer, and may report the radio channel quality to the radio resource management layer RRM for the physical layer PHY.

Specifically, the higher layer request message may be a request message sent by a higher layer to an access layer for requesting the access layer to send the relay discovery message.

According to the method for processing the relay discovery message, whether the relay discovery message is sent or not is determined through the high-layer request message, wireless channel quality measurement and threshold condition comparison are not needed to be executed by the access layer, judgment time required by the access layer for sending the message is saved, and sending time delay of the relay discovery message is reduced.

when submitting the relay discovery message to the access layer;

before submitting the relay discovery message to the access layer;

After submitting the relay discovery message to the access layer.

Specifically, when the relay discovery message is submitted to the access layer, the higher layer refers to when the encapsulated higher layer message is submitted to the access layer; before submitting the relay discovery message to the access layer, the higher layer is before submitting the encapsulated higher layer message to the access layer; the step of submitting the relay discovery message to the access layer is that the higher layer submits the encapsulated higher layer message to the access layer.

Optionally: and under the condition that the relay discovery message is determined to be sent, sending the L2 ID of the remote terminal and/or the message type identification of the relay discovery message to a receiving end of the relay discovery message.

Specifically, the L2 ID of the remote terminal and/or the message type of the relay discovery message may be carried by the relay discovery message, or by rewriting a data structure identifier in the relay discovery message; or may be sent separately from the relay discovery message, where the receiving end of the relay discovery message may confirm that the two messages are associated with each other, e.g. may carry a message identifier for associating the L2 ID of the receiving end of the relay discovery message to the relay discovery message and/or the message type of the relay discovery message.

It should be understood that the above-described case where the indication information includes the L2 ID corresponding to the remote terminal, the case where the indication information includes the message type, the case where the indication information includes a higher layer request message for instructing the access layer to transmit the relay discovery message, or the capability information of the first terminal may be used in combination. For example, priorities are set for the respective cases, the respective cases are sequentially judged according to the priorities, and the transmission of the relay discovery message is confirmed when a certain case is satisfied. It should be understood that the foregoing is illustrative of the embodiments of the present application and is not to be construed as limiting the present application in any way.

According to the processing method of the relay discovery message, the L2 ID of the remote terminal and/or the message type of the relay discovery message are/is sent to the receiving end of the relay discovery message, so that the receiving end can acquire the L2 ID of the remote terminal and/or the message type of the relay discovery message, and when the upper layer of the receiving end submits the relay discovery message to the access layer, the receiving end access layer can judge whether to send the relay discovery message submitted by the upper layer or not based on the L2 ID and/or the message type, and resource waste is avoided.

Fig. 6 is a second flowchart of a method for processing a relay discovery message according to an embodiment of the present application, and referring to fig. 6, the method is applied to a first terminal, and includes:

step 610, the first terminal access layer receives a U2U relay type relay discovery message sent by a higher layer;

the capability information of the first terminal refers to the capability of the first terminal related to the relay service, such as whether the first terminal can establish the target relay link.

In step 620, the first terminal access layer determines whether to send the relay discovery message based on the capability information of the first terminal.

According to the method for processing the relay discovery message, the first terminal access layer determines whether to send the relay discovery message according to the capability information of the first terminal, so that the problem of resource waste caused by the fact that the first terminal sends the unnecessary relay discovery message is avoided. For example, the Relay discovery message may be prevented from being sent when the first terminal has no capability to establish a U2U Relay type link.

Specifically, the first terminal supports a terminal-to-terminal relay service, that is, the first terminal supports a U2U relay service, such as the first terminal supports a carrier frequency point of the U2U relay.

The first terminal supports dual connection, that is, the first terminal supports two communication modes of direct communication and network centralized control to work simultaneously. It should be understood that, in the case that the first terminal supports dual connection, the first terminal may establish a link with the remote terminal through the network side, and simultaneously attempt to send the relay discovery message, and establish a link with the remote terminal through the relay, thereby ensuring the reliability of the communication link.

Alternatively, the first terminal access layer may determine whether to transmit the relay discovery message based on the received indication information and the capability information of the first terminal.

Illustratively, the indication information includes a message type identifier, and the access layer determines whether to send the Relay discovery message according to the capability information of the first terminal in the case that the Relay discovery message is known to be a Relay discovery message of a U2U Relay type.

In the case where the radio channel quality is RSRP, the threshold condition operation for the first terminal may be as shown in the various embodiments described below.

Example 1: the first terminal is a Source UE supporting NR sidelink U2U relay, and the threshold condition is operated as follows:

(1) When the threshold for sending the NR-sidelink U2U relay discovery message is not satisfied:

when the first threshold and/or the second threshold for the U2U relay discovery of the Remote UE are not configured; or when the RSRP measurement result from the first terminal to the Target UE is lower than a certain offset below a second threshold;

and judging that the NR sidelink U2U Source UE threshold condition is met at the moment, namely that the wireless channel quality meets the preset threshold condition.

(2) When the RSRP measurement result from the first terminal to the Target UE is higher than a second threshold; and judging that the threshold condition of the NR sidelink U2U Source UE is not satisfied at the moment, namely that the quality of the wireless channel does not satisfy the preset threshold condition.

Example 2: the first terminal is a Relay UE supporting NR sidelink U2U Relay, and the threshold condition is operated as follows:

(1) When the threshold condition for sending the NR-side link U2U relay discovery message is not met, any one or a combination of the following conditions is met, and it is judged that the threshold condition of the NR-side link U2URelay UE is met at the moment, namely the quality of the wireless channel meets the preset threshold condition:

a. when the third threshold found by the U2U relay for the Remote UE is not configured; or when the RSRP measurement result from the first terminal to the Source UE is lower than a certain offset below a third threshold;

b. when the fourth threshold of U2U relay discovery for Remote UE is not configured; or when the RSRP measurement result from the first terminal to the Source UE is higher than a certain offset above a fourth threshold;

the RSRP wireless channel quality is not stored between the relay UE and the Target UE; or the RSRP of the PC5 interface between the Relay UE and the Target UE meets preset conditions, wherein the preset conditions comprise: when the RSRP of the PC5 port between the Relay UE and the Target UE is lower than a certain offset below a fifth threshold; and/or when the PC5 port RSRP between the Relay UE and the Target UE is higher than a certain offset above a sixth threshold.

(2) When any one or a combination of the following conditions are met, judging that the threshold condition of the NR sidelink U2U Relay UE is not met at the moment, namely that the quality of the wireless channel does not meet the preset threshold condition:

a. When the RSRP measurement result from the first terminal to the Source UE is higher than a third threshold (if the third threshold is configured);

b. when the RSRP measurement of the first terminal to the Source UE is below a fourth threshold (if the fourth threshold is configured);

c. RSRP wireless channel quality is stored between a first terminal serving as a Relay UE and a Target UE; and the RSRP of the PC5 interface between the first terminal and the Target UE meets preset conditions, wherein the preset conditions comprise: the PC5 port RSRP between the first terminal to the Target UE is higher than a fifth threshold (if configured); and/or the PC5 port RSRP between the first terminal and the Target UE is below a sixth threshold (if configured).

Example 3: the first terminal is a Target UE supporting NR sidelink U2U Relay, and the threshold condition is operated as follows:

(1) When the threshold for transmitting the NR-side link U2U Relay discovery message is not met, if any one or a combination of the following conditions are met, judging that the threshold condition of the NR-side link U2U Relay UE is met at the moment, namely that the quality of the wireless channel meets the preset threshold condition:

a. when the seventh threshold found for the U2U relay of the Target UE is not configured; or when the RSRP measurement result from the first terminal to the Source UE is lower than the seventh threshold by a certain offset:

b. When the eighth threshold found for the U2U relay of the Target UE is not configured; or when the RSRP measurement result from the Target UE to the currently connected Relay UE is lower than a certain offset below an eighth threshold;

c. when the U2U relay aiming at the Target UE discovers that the tenth threshold is not configured; or the RSRP measurement of the TargetUE to the potential Relay UE is above a tenth threshold by an offset.

a. when the RSRP measurement result from the first terminal to the sourceUE is higher than a seventh threshold;

when the RSRP measurement result from the target UE to the currently connected Relay UE is higher than an eighth threshold (if the eighth threshold is configured);

and c, when the RSRP measurement result from the target UE to the Relay UE is lower than a tenth threshold (if the tenth threshold is configured).

In case the radio channel quality is BLER, the threshold condition operation for the first terminal may be as shown in the following embodiments.

Example 4: the first terminal is a Source UE supporting NR sidelink U2U relay, and the threshold condition is operated as follows:

When the eleventh threshold and/or the twelfth threshold of the U2U relay discovery for the Remote UE is not configured; or when the BLER measurement result from Source UE to target UE is higher than a twelfth threshold by a certain offset:

(2) When the BLER measurement from the first terminal to the target UE is below the eleventh threshold: and judging that the threshold condition of the NR sidelink U2U Source UE is not satisfied at the moment, namely that the quality of the wireless channel does not satisfy the preset threshold condition.

Example 5: the first terminal is a Relay UE supporting NR sidelink U2U Relay, and the threshold condition is operated as follows:

a. when the thirteenth threshold for U2U relay discovery for Remote UE is not configured; or when the BLER measurement result from the first terminal to the Source UE is higher than a certain offset below a thirteenth threshold;

b. when the fourteenth threshold for U2U relay discovery for Remote UE is not configured; or when the BLER measurement result from the first terminal to the Source UE is lower than a certain offset above a fourteenth threshold;

c. The BLER wireless channel quality which is not stored between the first terminal serving as the Relay UE and the Target UE; or the BLER of the PC5 port between the first terminal and the Target UE meets preset conditions, wherein the preset conditions comprise: when the BLER of a PC5 port between the first terminal and the Target UE is higher than a fifteenth threshold by a certain offset; and/or when the PC5 port BLER between the first terminal and the Target UE is below a sixteenth threshold by an offset.

a. when the BLER measurement from the first terminal to the Source UE is below a thirteenth threshold (if configured);

b. when the BLER measurement from the first terminal to the Source UE is above a fourteenth threshold (if a fourteenth threshold is configured);

d. the BLER wireless channel quality which is not stored between the first terminal serving as the Relay UE and the Target UE; or the PC5 port BLER between the first terminal to the Target UE is below a fifteenth threshold (if configured); and the PC5 port BLER between the first terminal to the Target UE is above the sixteenth threshold (if configured).

Example 6: the first terminal is a Target UE supporting NR sidelink U2U Relay, and the threshold condition is operated as follows:

a. when the seventeenth threshold found for the U2U relay of the Target UE is not configured; or when the BLER measurement result from the first terminal to the Source UE is higher than a seventeenth threshold by a certain offset;

b. when the eighteenth threshold found by the U2U relay for the Target UE is not configured; or when the BLER measurement result from the Target UE to the currently connected Relay UE is higher than a certain offset below an eighteen threshold;

c. when the nineteen thresholds found for the U2U relay of the Target UE are not configured; or when the BLER measurement from the Target UE to the potential Relay UE is below a nineteenth threshold by an offset.

a. When the BLER measurement result from the first terminal to the Source UE is lower than a seventeenth threshold;

when the BLER measurement result from the target UE to the currently connected Relay UE is lower than an eighteenth threshold (if the eighteenth threshold is configured);

and c, when the BLER measurement result from the target UE to the potential Relay UE is higher than a nineteenth threshold (if the nineteenth threshold is configured).

The transmission of the relay discovery signal is described below in conjunction with embodiment 7.

Example 7: transmission of NR-sidelink U2U relay discovery message

One terminal supporting NR sidelink relay discovery operates as follows:

(1) In the case where the first terminal is selecting as the Source UE or has selected the U2U relay, if any one or a combination of the following conditions are satisfied:

a. the higher layer indicates the L2 ID of the Target UE to the access layer;

b. the higher layer indicates that the discovery message is a relay discovery message of the U2U relay type;

c. when the wireless channel quality meets the preset threshold condition;

the source UE supports direct communication and network centralized control dual-connection to work simultaneously;

the access stratum is instructed to perform the procedures of resource pool selection, resource allocation, etc. within the range of the resource pool used for transmitting the U2U relay discovery message.

(2) When the first terminal is used as a relay terminal of a U2U type, if any one or a combination of the following conditions are satisfied:

a. The higher layer indicates the L2ID of Source UE and the L2ID of Target UE to the access layer;

b. the higher layer indicates that the relay discovery message is a U2U relay type relay discovery message;

c. when the wireless channel quality meets the preset threshold condition;

(3) When the first terminal receives the discovery message submitted by the higher layer as the Target UE, if any one or a combination of the following conditions are satisfied:

a. the higher layer indicates the L2ID of Source Ue to the access layer;

c. when the wireless channel quality meets the preset threshold condition;

the target UE supports direct communication and network centralized control dual-connection to work simultaneously;

According to the method for processing the relay discovery message, the first terminal access layer determines whether to send the relay discovery message or not, so that unnecessary sending of the relay discovery message is avoided, and resource waste is avoided.

Fig. 7 is one of schematic structural diagrams of a processing apparatus for relaying discovery messages provided in an embodiment of the present application, and referring to fig. 7, the apparatus may be applied to a first terminal, and includes: a first receiving unit 710, a second receiving unit 720, and a first determining unit 730;

a first receiving unit 710, configured to receive, by the first terminal access layer, a U2U relay type relay discovery message sent by a higher layer;

a second receiving unit 720, configured to receive, by the first terminal access layer, indication information sent by a higher layer and/or a second terminal;

a first determining unit 730, configured to determine, by the first terminal access layer, whether to send the relay discovery message based on the indication information.

The processing device for the relay discovery message provided by the embodiment of the application determines whether to send the relay discovery message according to the received indication information, so that the problem of resource waste caused by the fact that the first terminal sends the unnecessary relay discovery message is avoided.

The method and the device provided in the embodiments of the present application are based on the same application conception, and since the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

Fig. 8 is a second schematic structural diagram of a processing apparatus for relaying discovery messages according to an embodiment of the present application, and referring to fig. 8, the apparatus may be applied to a first terminal, and includes: a third receiving unit 810 and a second determining unit 820;

A third receiving unit 810, where the first terminal access layer receives a U2 relay type relay discovery message sent by a higher layer;

a second determining unit 820, configured to determine whether to send the relay discovery message based on the capability information of the first terminal by the first terminal access layer.

According to the processing device for the relay discovery message, whether the relay discovery message is sent or not is determined according to the capability information of the first terminal, so that the problem of resource waste caused by the fact that the first terminal sends the unnecessary relay discovery message is avoided.

Fig. 9 is one of schematic structural diagrams of a first terminal provided in an embodiment of the present application, and as shown in fig. 9, the first terminal includes a memory 920, a transceiver 900 and a processor 910; wherein the processor 910 and the memory 920 may also be physically separate.

A memory 920 for storing a computer program; a transceiver 900 for transceiving data under the control of a processor 910.

In particular, transceiver 900 is configured to receive and transmit data under the control of processor 910.

Wherein in fig. 9, bus interface 940 may include any number of interconnected buses and bridges, and in particular, one or more processors represented by processor 910 and various circuits of memory represented by memory 920, are linked together. The bus interface 940 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, are not described further herein. The bus interface provides an interface. Transceiver 900 may be a number of elements, including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, etc. For different first terminals, a user interface 930 may also be included, and the user interface 930 may also be an interface capable of interfacing with an internal connection requiring device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 910 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 910 in performing operations.

Alternatively, the processor 910 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 ), and the processor may also employ a multi-core architecture.

The processor 910 is configured to execute operations corresponding to any of the methods provided in the embodiments of the present application according to the obtained executable instructions by calling a computer program stored in the memory 920, for example:

the first terminal access layer determines whether to send the relay discovery message based on the indication information, wherein the indication information is sent by a higher layer of the first terminal and/or a second terminal.

Optionally, the wireless channel quality includes one or more of:

SD-RSRP；

SL-RSRP；

SD-RSRQ；

SL-RSRQ；

BLER；

number of HARQ retransmissions.

Optionally, the operations further comprise: in the case that the wireless channel quality is determined not to meet the first condition, the first terminal access layer determines whether a second condition is met;

the second condition includes any one or a combination of the following:

the first threshold is not configured;

the second threshold is not configured.

Optionally, the operations further comprise: in the case that the wireless channel quality is determined not to meet the third condition, the first terminal access layer determines whether a fourth condition is met;

the fourth condition includes any one or a combination of the following:

the third threshold is not configured;

the fourth threshold is not configured;

wherein the ninth threshold is higher than the tenth threshold.

Optionally, the operations further comprise: in the case that the wireless channel quality is determined not to meet the fifth condition, the first terminal access layer determines whether a sixth condition is met;

the sixth condition includes any one or a combination of the following:

a seventh threshold is not configured;

the eighth threshold is not configured;

a ninth threshold is not configured;

the tenth threshold is not configured.

Optionally, the operations further comprise: in the case that the wireless channel quality is determined not to meet the seventh condition, the first terminal access layer determines whether an eighth condition is met;

the eighth condition includes any one or a combination of the following:

the eleventh threshold is not configured;

the twelfth threshold is not configured.

Optionally, the operations further comprise: in the case that the wireless channel quality is determined not to meet the ninth condition, the first terminal access layer determines whether a tenth condition is met;

the tenth condition includes any one or a combination of the following:

the thirteenth threshold is not configured;

a fourteenth threshold is not configured;

wherein the nineteenth threshold is lower than the twentieth threshold.

Optionally, the operations further comprise: in the case that the wireless channel quality is determined not to meet the eleventh condition, the first terminal access layer determines whether a twelfth condition is met;

the twelfth condition includes any one or a combination of the following:

a seventeenth threshold is not configured;

an eighteenth threshold is not configured;

a nineteenth threshold is not configured;

the twentieth threshold is not configured.

Optionally, the operations further comprise:

when submitting the relay discovery message to the access layer;

before submitting the relay discovery message to the access layer;

after submitting the relay discovery message to the access layer.

Optionally, the operations further comprise: and under the condition that the relay discovery message is determined to be sent, sending the L2 ID of the remote terminal and/or the message type identification of the relay discovery message to a receiving end of the relay discovery message.

It should be noted that, the above first terminal provided by the embodiment of the present invention can implement all the method steps implemented by the above method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiment in the present embodiment are omitted herein.

Fig. 10 is a second schematic structural diagram of a first terminal according to an embodiment of the present application, as shown in fig. 10, where the first terminal includes a memory 1020, a transceiver 1000 and a processor 1010; wherein the processor 1010 and the memory 1020 may also be physically separate.

A memory 1020 for storing a computer program; a transceiver 1000 for transceiving data under the control of the processor 1010.

In particular, the transceiver 1000 is operative to receive and transmit data under the control of the processor 1010.

Wherein in FIG. 10, bus interface 1040 may include any number of interconnected buses and bridges, and in particular, one or more processors represented by processor 1010 and various circuits of memory represented by memory 1020, linked together. The bus interface 1040 may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., all of which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. Transceiver 1000 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over transmission media, including wireless channels, wired channels, optical cables, etc. For different first terminals, a user interface 1030 may also be included, the user interface 1030 may also be an interface capable of interfacing with an internal connection requiring device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1010 in performing operations.

Alternatively, the processor 1010 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 ), which may also employ a multi-core architecture.

The processor 1010 is configured to execute operations corresponding to any of the methods provided in the embodiments of the present application according to the obtained executable instructions by calling a computer program stored in the memory 1020, for example:

It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice. In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be noted that, the above device provided in the embodiment of the present invention can implement all the method steps implemented in the method embodiment and achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those in the method embodiment in this embodiment are omitted.

In another aspect, an embodiment of the present application further provides a processor readable storage medium, where a computer program is stored, where the computer program is configured to cause the processor to execute a method for processing a relay discovery message provided in the foregoing embodiments, where the method may be applied to a first terminal, and the method includes:

The processor-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), and the like.

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, magnetic disk storage, 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-executable instructions. These computer-executable 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 processor-executable instructions may also be stored in a processor-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 processor-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 processor-executable 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.

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 for processing a relay discovery message, applied to a first terminal, comprising:

2. The method according to claim 1, wherein in the case where the indication information includes an L2 ID corresponding to a remote terminal, the first terminal access layer determines whether to transmit the relay discovery message based on the indication information, comprising:

3. The method of claim 2, wherein the wireless channel quality comprises one or more of:

SD-RSRP；

SL-RSRP；

SD-RSRQ；

SL-RSRQ；

BLER；

number of HARQ retransmissions.

4. A method of processing a relay discovery message according to claim 3, wherein the radio channel quality comprises any one or a combination of the following: in the case of SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ, and the first terminal is a source terminal, the threshold condition includes a first condition, the first condition being any one of or a combination of the following:

5. A method of processing a relay discovery message according to claim 3, wherein the radio channel quality comprises any one or a combination of the following: in the case where the SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ are relay terminals, the threshold condition includes a third condition, the third condition is any one of or a combination of the following:

6. A method of processing a relay discovery message according to claim 3, wherein the radio channel quality comprises any one or a combination of the following: in the case where the SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ are target terminals, the threshold condition includes a fifth condition, the fifth condition being any one or a combination of the following:

wherein the ninth threshold is higher than the tenth threshold.

7. A method of handling a relay discovery message according to claim 3, wherein, in case the radio channel quality comprises BLER and/or HARQ retransmission times and the first terminal is a source terminal, the threshold condition comprises a seventh condition, the seventh condition being any one or a combination of the following:

8. A method of handling a relay discovery message according to claim 3, characterized in that in case the radio channel quality comprises BLER and/or HARQ retransmission times and the first terminal is a relay terminal, the threshold condition comprises a ninth condition, which is any one or a combination of the following:

9. A method of handling a relay discovery message according to claim 3, characterized in that in case the radio channel quality comprises BLER and/or HARQ retransmission times and the first terminal is a target terminal, the threshold condition comprises an eleventh condition, which is any one or a combination of the following:

Wherein the nineteenth threshold is lower than the twentieth threshold.

10. The method according to claim 1, wherein in case the indication information includes a message type identification, the first terminal access layer determining whether to transmit the relay discovery message based on the indication information, comprises:

11. The method for processing the relay discovery message according to claim 10, wherein the threshold condition comprises: the CBR is below a twenty-first threshold.

12. The method for processing a relay discovery message according to any one of claims 2 to 11, wherein the threshold value in the threshold condition is a range interval formed by a base threshold and an offset.

13. The method for processing a relay discovery message according to any one of claims 2 to 9, wherein the method further comprises:

14. The method according to claim 1, wherein in the case where the indication information includes a higher layer request message, the first terminal access layer determining whether to transmit the relay discovery message based on the indication information, comprises:

15. The method of processing a relay discovery message according to any one of claims 1-11 or 14, wherein the relay discovery message comprises a discovery request message and/or a discovery response message.

16. The method for processing a relay discovery message according to any one of claims 1 to 11 or claim 14, wherein the time for the higher layer to send the indication information to the access layer includes any one of the following cases:

when submitting the relay discovery message to the access layer;

before submitting the relay discovery message to the access layer;

After submitting the relay discovery message to the access layer.

17. A method for processing a relay discovery message, applied to a first terminal, comprising:

18. The method for processing the relay discovery message according to claim 17, wherein the first terminal access layer determining whether to transmit the relay discovery message based on the capability information of the first terminal comprises:

19. A first terminal, the first terminal comprising:

a memory, transceiver and processor;

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

20. The first terminal of claim 19, wherein, in the case that the indication information includes an L2 ID corresponding to a remote terminal, the first terminal access layer determining whether to transmit the relay discovery message based on the indication information comprises:

wherein the measurement object comprises any one or a combination of the following: the system comprises a source terminal, a target terminal, a relay terminal currently connected with the first terminal and a potential relay terminal.

21. The first terminal of claim 20, wherein the wireless channel quality comprises one or more of:

SD-RSRP；

SL-RSRP；

SD-RSRQ；

SL-RSRQ；

BLER；

number of HARQ retransmissions.

22. The first terminal of claim 21, wherein the radio channel quality comprises any one or a combination of the following: in the case of SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ, and the first terminal is a source terminal, the threshold condition includes a first condition, the first condition being any one of or a combination of the following:

23. The first terminal of claim 21, wherein the radio channel quality comprises any one or a combination of the following: in the case where the SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ are relay terminals, the threshold condition includes a third condition, the third condition is any one of or a combination of the following:

24. The first terminal of claim 21, wherein the radio channel quality comprises any one or a combination of the following: in the case where the SD-RSRP, SL-RSRP, SD-RSRQ, and SL-RSRQ are target terminals, the threshold condition includes a fifth condition, the fifth condition being any one or a combination of the following:

Wherein the ninth threshold is higher than the tenth threshold.

25. The first terminal of claim 19, wherein, in the case where the indication information includes a message type identification, the first terminal access layer determining whether to send the relay discovery message based on the indication information includes:

26. The first terminal according to any of the claims 20-25, characterized in that the threshold value in the threshold condition is a range interval of base threshold and offset.

27. The first terminal of any of claims 20-24, wherein the operations further comprise:

28. The first terminal of claim 19, wherein in the case where the indication information includes a higher layer request message, the first terminal access layer determining whether to transmit the relay discovery message based on the indication information comprises:

29. The first terminal according to any of claims 19-25 or 28, wherein the relay discovery message comprises a discovery request message and/or a discovery response message.

30. The first terminal according to any of claims 19-25 or 28, wherein the time for the higher layer to send the indication information to the access layer comprises any of:

when submitting the relay discovery message to the access layer;

before submitting the relay discovery message to the access layer;

after submitting the relay discovery message to the access layer.

31. A first terminal, the first terminal comprising:

a memory, transceiver and processor;

32. A processing apparatus for relaying discovery messages, applied to a first terminal, comprising:

33. A processing apparatus for relaying discovery messages, applied to a first terminal, comprising:

34. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the method of processing a relay discovery message according to any one of claims 1 to 16 or the method of processing a relay discovery message according to any one of claims 17 to 18.