CN117255385A

CN117255385A - Relay communication method, device and terminal

Info

Publication number: CN117255385A
Application number: CN202210648857.9A
Authority: CN
Inventors: 郑倩; 刘佳敏; 鲍炜
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2023-12-19
Also published as: WO2023236975A1

Abstract

The application discloses a relay communication method, a device and a terminal, which belong to the field of mobile communication, and the relay communication method in the embodiment of the application comprises the following steps: the method comprises the steps that a first terminal obtains first information, wherein the first information comprises configuration information of a bearer for establishing sidelink communication; the first terminal sends configuration information corresponding to other terminals except the first terminal to the other terminals in the sidelink communication according to the first information; the first terminal is a source terminal in the sidelink communication or one of N relay terminals in the sidelink communication; the first information comprises first configuration information and n+1 sets of second configuration information, the first configuration information is end-to-end configuration information in the carried configuration information, the second configuration information is configuration information corresponding to each hop in the carried configuration information, and the N is a positive integer.

Description

Relay communication method, device and terminal

Technical Field

The application belongs to the technical field of mobile communication, and particularly relates to a relay communication method, a relay communication device and a relay communication terminal.

Background

In a terminal-to-terminal (U2U) sidelink relay communication (sidelink) scenario, including a source terminal (sourcue) and a Destination terminal (Destination UE) at both ends, and at least one relay terminal (relay UE) in the middle, the end source terminal and the Destination terminal forward data transmission between the source terminal and the Destination terminal by the relay UE through sidelinks (sidelinks) with the relay UE, the relay UE plays a role in data transfer.

In the U2U sidelink relay scenario, a configuration method of the sidelink relay communication bearer in each terminal needs to be formulated.

Disclosure of Invention

The embodiment of the application provides a relay communication method, a relay communication device and a terminal, which can realize the configuration of a secondary link relay communication load in a U2U sidelink relay scene at each terminal.

In a first aspect, a relay communication method is provided, applied to a first terminal, and the method includes:

the method comprises the steps that a first terminal obtains first information, wherein the first information comprises configuration information of a bearer for establishing sidelink communication;

the first terminal sends configuration information corresponding to other terminals except the first terminal to the other terminals in the sidelink communication according to the first information;

the first terminal is a source terminal in the sidelink communication or one of N relay terminals in the sidelink communication; the first information comprises first configuration information and n+1 sets of second configuration information, the first configuration information is end-to-end configuration information in the carried configuration information, the second configuration information is configuration information corresponding to each hop in the carried configuration information, each set of second configuration information corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in the sidelink communication, and N is a positive integer.

In a second aspect, there is provided a relay communication apparatus including:

the first transmission module is used for acquiring first information, wherein the first information comprises configuration information of a bearer used for establishing the communication of the auxiliary link;

the first configuration module is used for transmitting configuration information corresponding to other terminals except the first terminal in the sidelink communication to the other terminals according to the first information;

wherein the relay communication device is a source terminal in the sidelink communication or one of N relay terminals in the sidelink communication; the first information comprises first configuration information and n+1 sets of second configuration information, the first configuration information is end-to-end configuration information in the carried configuration information, the second configuration information is configuration information corresponding to each hop in the carried configuration information, each set of second configuration information corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in the sidelink communication, and N is a positive integer.

In a third aspect, a relay communication method is provided, applied to a second terminal, and the method includes:

the second terminal receives L sets of second configuration information and first configuration information from a third terminal, and determines 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal from the L sets of second configuration information;

The second terminal sends the rest L-1 sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal to a fourth terminal;

the second terminal is a kth hop relay terminal in N relay terminals in the sidelink communication, the first configuration information is end-to-end configuration information in configuration information for establishing a bearer of the sidelink communication, the second configuration information is configuration information corresponding to each hop in the configuration information of the bearer, each set of second configuration information corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in the sidelink communication, the first configuration information and the second configuration information are determined by a first terminal, the first terminal is a source terminal of the sidelink communication or one of the N relay terminals in the sidelink communication, both N and K, L are positive integers, and L and K are smaller than or equal to n+1; the third terminal and the first terminal are the same terminal or different terminals, and at least one of the following conditions is satisfied when the third terminal and the first terminal are different terminals:

The third terminal is one of M1 relay terminals in an upstream link of the first terminal;

the third terminal is one of M2 relay terminals in a downstream link of the first terminal;

the upstream link of the first terminal comprises M1 relay terminals between the source terminal and the first terminal and the source terminal; the downstream link of the first terminal includes M2 relay terminals between the first terminal and a destination terminal, and the destination terminals, M1 and M2 are integers greater than or equal to 0, m1+m2=n-1.

In a fourth aspect, there is provided a relay communication apparatus including:

the second transmission module is used for receiving L sets of second configuration information and first configuration information from a third terminal and determining 1 set of second configuration information corresponding to the relay communication device from the L sets of second configuration information;

the second configuration module is used for sending the rest L-1 sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal to a fourth terminal;

the relay communication device is a kth hop relay terminal in N relay terminals in sidelink communication, the first configuration information is end-to-end configuration information in configuration information used for establishing a bearer of sidelink communication, the second configuration information is configuration information corresponding to each hop in the bearer of configuration information, each set of second configuration information corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in sidelink communication, the first configuration information and the second configuration information are determined by a first terminal, the first terminal is a source terminal of sidelink communication or one of the N relay terminals in sidelink communication, both N and K, L are positive integers, and L and K are smaller than or equal to n+1; the third terminal and the first terminal are the same terminal or different terminals, and at least one of the following conditions is satisfied when the third terminal and the first terminal are different terminals:

In a fifth aspect, there is provided a first terminal comprising a processor and a memory storing a program or instructions executable on the processor, which program or instructions when executed by the processor implement the steps of the method as described in the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to send, by the first terminal, configuration information corresponding to other terminals except the first terminal in the sidelink communication to the other terminals according to the first information, and the communication interface is configured to obtain, by the first terminal, the first information including configuration information for establishing a bearer of the sidelink communication.

In a seventh aspect, there is provided a second terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the third aspect.

In an eighth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to receive L sets of second configuration information and first configuration information from a third terminal, determine 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal from the L sets of second configuration information, and the communication interface is configured to send remaining L-1 sets of second configuration information and first configuration information except for 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal to a fourth terminal.

A ninth aspect provides a relay communication system, comprising: a first terminal operable to perform the steps of the relay communication method according to the first aspect, and a second terminal operable to perform the steps of the relay communication method according to the third aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect, or performs the steps of the method according to the third aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions to implement the method according to the first aspect or to implement the method according to the third aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the relay communication method as in the first aspect, or to implement the steps of the relay communication method as in the third aspect.

In the embodiment of the application, the configuration carried in the U2U relay communication is realized by acquiring the first information, where the first information includes configuration information for establishing a bearer of the secondary link communication, including the first configuration information and n+1 sets of second configuration information, and then transmitting the configuration information corresponding to other terminals except the first terminal to other terminals in the secondary link communication according to the first information.

Drawings

Fig. 1 is a schematic structural diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a schematic structural diagram of a relay communication system according to an embodiment of the present application;

Fig. 3 is a schematic flow chart of a relay communication method according to an embodiment of the present application;

fig. 4 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 5 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 6 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 7 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 8 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 9 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 10 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 11 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 12 is a flowchart of another relay communication method according to an embodiment of the present application;

fig. 13 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 14 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 15 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

Fig. 16 is a flowchart of another relay communication method according to an embodiment of the present application;

fig. 17 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 18 is a flowchart of another relay communication method according to an embodiment of the present application;

fig. 19 is a flowchart of another relay communication method according to an embodiment of the present application;

fig. 20 is a flowchart of another relay communication method according to an embodiment of the present application;

fig. 21 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 22 is a flowchart of another relay communication method according to an embodiment of the present application;

fig. 23 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 24 is a schematic structural diagram of a relay communication device according to an embodiment of the present application;

fig. 25 is a schematic flow chart of another relay communication method according to an embodiment of the present application;

fig. 26 is a schematic structural diagram of a relay communication device according to an embodiment of the present application;

fig. 27 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 28 is a schematic structural diagram of a terminal implementing an embodiment of the present application;

Fig. 29 is a schematic structural diagram of another terminal implementing an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally intended to be used in a generic sense and not to limit the number of objects, for example, the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the present application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a new air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. Note that, the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, a WLAN access point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmitting/receiving point (TransmittingReceivingPoint, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiments of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited. The core network device may include, but is not limited to, at least one of: a core network node, a core network function, a mobility management entity (Mobility Management Entity, MME), an access mobility management function (Access and Mobility Management Function, AMF), a session management function (Session Management Function, SMF), a user plane function (User Plane Function, UPF), a policy control function (Policy Control Function, PCF), a policy and charging rules function (Policy and Charging Rules Function, PCRF), an edge application service discovery function (EdgeApplicationServerDiscoveryFunction, EASDF), unified data management (Unified Data Management, UDM), unified data repository (Unified Data Repository, UDR), a home subscriber server (Home Subscriber Server, HSS), a centralized network configuration (Centralized network configuration, CNC), a network storage function (Network Repository Function, NRF), a network opening function (NetworkExposureFunction, NEF), a local NEF (LocalNEF, or L-NEF), a binding support function (Binding Support Function, BSF), an application function (Application Function, AF), and the like. In the embodiment of the present application, only the core network device in the NR system is described as an example, and the specific type of the core network device is not limited.

The relay communication method, the relay communication device and the relay communication terminal provided by the embodiment of the application are described in detail below through some embodiments and application scenes thereof with reference to the accompanying drawings.

As shown in fig. 2 and 3, the embodiment of the present application provides a relay communication method, the execution subject of which is a first terminal, in other words, the method may be executed by software or hardware installed in the first terminal. The method comprises the following steps:

s310, the first terminal acquires first information, wherein the first information comprises configuration information for establishing a bearer of the sidelink communication.

As shown in fig. 2, the sidelink communication is a U2U sidelink relay communication between a source terminal 21 and a destination terminal 22, and data transfer is performed between the source terminal 21 and the destination terminal 22 through N relay terminals 23, where N is a positive integer. Data transmission is performed between the source terminal 21 and the relay terminal 23, between the relay terminals 23, and between the relay terminal 23 and the destination terminal 22 through a sidelink interface (PC 5). The source terminal may be a service initiation terminal of the sidelink communication, or may be a service flow sending terminal in a service transmission process of the sidelink communication, and correspondingly, the destination terminal may be a service receiving terminal of the sidelink communication, or may be a service flow receiving terminal in a service transmission process of the sidelink communication.

The first terminal may be the source terminal 21 in the sidelink communication or one of the N relay terminals 23 in the sidelink communication.

For a sidelink communication with n=1, it may also be referred to as a single-hop relay (single-hop relay) scenario. It is understood that the initial hop corresponding to the source terminal does not count the total hop count or is numbered as hop 0 (hop-0), and the hop corresponding to the first hop terminal is numbered as hop 1 (hop-1). For sub-link communication with N >1, it may also be referred to as a multi-hop relay (multi-hop relay) scenario or an N-hop relay (N-hop relay) scenario. Similarly, the initial hop corresponding to the source terminal does not count the total hop count or is numbered as hop 0 (hop-0), the hop corresponding to the first hop terminal is numbered as hop 1 (hop-1), and so on.

The first information comprises first configuration information and n+1 sets of second configuration information, the first configuration information is end-to-end configuration information in the carried configuration information, the second configuration information is configuration information corresponding to each hop in the carried configuration information, each set of second configuration information corresponds to one hop corresponding to a source terminal or one hop corresponding to one of N relay terminals in the sidelink communication, and N is a positive integer. For simplicity of description, as described above, each hop in the sidelink communication may be numbered, and each set of second configuration information corresponds to a kth hop in the sidelink communication, where K is any integer less than or equal to N.

The sidelink communication needs to establish an end-to-end sidelink bearer (End to End Sidelink Radio Bearer, E2 ESLRB) between the source terminal 21 and the destination terminal 22 and a sidelink bearer from Hop to Hop (Hop-by-Hop) corresponding to each Hop between the source terminal 21 and the destination terminal 22, which may also be referred to as a radio link control bearer (Radio Link Control Bearer, rlc beam) or a radio link control channel (rlc tunnel), and for simplicity, the following embodiments take rlc beam as an example, and accordingly, the bearer configuration information of the first communication may include a first configuration information corresponding to E2ESLRB and n+1 sets of second configuration information corresponding to the rlc beam of each Hop.

In one embodiment, the first configuration information includes at least one of:

end-to-end sidelink radio bearer identification (SLRBID);

the source terminal and the destination terminal are configured by a peer-to-peer sidelink service data adaptation protocol (PC 5 Service Data Adaptation Protocol, PC 5-SDAP) entity;

the source terminal and the destination terminal are configured by a peer-to-peer sidelink packet data convergence protocol (PC 5 Packet Data Convergence Protocol, PC5 PDCP) entity.

In one embodiment, the second configuration information of each hop in the n+1 sets of second configuration information includes at least one of the following:

A sidelink relay adaptation layer protocol (PC 5 Sidelink Relay Adaptation Protocol, PC5 SRAP) entity configuration peer to peer with each hop;

a sidelink radio link control (PC 5 Radio Link Control, PC5 RLC) entity configuration peer to peer with each hop;

a sidelink media access control entity configuration (PC 5 Medium Access Control, PC5 MAC) peer to peer with each hop.

For the second configuration information of the 0 th hop, the second configuration information of the 0 th hop includes at least one of the following:

the source terminal and the first hop relay terminal are configured by a peer-to-peer auxiliary link relay adaptation layer protocol entity;

the source terminal and the first hop relay terminal are configured by a peer-to-peer auxiliary link wireless link control entity;

the source terminal and the first hop relay terminal are configured by a peer-to-peer auxiliary link media access control entity;

the 0 th hop is a hop between the source terminal and a first hop relay terminal, and the first hop relay terminal is a relay terminal connected with the source terminal.

For the second configuration information of the nth hop, the second configuration information of the nth hop includes at least one of the following:

the peer-to-peer auxiliary link relay adaptation layer protocol entity configuration of the Nth hop relay terminal and the destination terminal;

The N-hop relay terminal and the destination terminal are configured by a peer-to-peer auxiliary link wireless link control entity;

the secondary link media access control entity configuration of the N-hop relay terminal and the destination terminal is equivalent;

the Nth hop is one hop between an Nth hop relay terminal and a destination terminal, and the Nth hop relay terminal is a relay terminal connected with the destination terminal.

For the second configuration information of the J-th hop, the second configuration information of the J-th hop includes at least one of the following:

the peer-to-peer auxiliary link relay adaptation layer protocol entity configuration of the J-th hop relay terminal and the J+1th hop relay terminal;

the secondary link wireless link control entity configuration of the J-th hop relay terminal and the J+1th hop relay terminal is equivalent;

the secondary link media access control entity configuration of the J-th hop relay terminal and the J+1th hop relay terminal is equivalent;

the J-th hop is one hop between the adjacent J-th hop relay terminal and the j+1-th hop relay terminal.

J is a positive integer greater than 1 and less than N.

S320, the first terminal sends configuration information corresponding to other terminals except the first terminal in the sidelink communication to the other terminals according to the first information;

After the first terminal obtains the first configuration information and the n+1 sets of second configuration information, the first configuration information can be sent to a source terminal and/or a destination terminal in a hop-by-hop transmission mode, 1 set of second configuration information corresponding to each relay terminal in the n+1 sets of second configuration information is sent to each relay terminal, and 1 set of second configuration information corresponding to the source terminal and/or the destination terminal is sent to the source terminal and/or the destination terminal.

In one embodiment, if the first terminal is a source terminal, after the first terminal obtains the first configuration information and the n+1 sets of second configuration information, the first terminal may send, by means of hop-by-hop transfer, the second configuration information corresponding to each relay terminal, and send, to a destination terminal, the second configuration information and the first configuration information corresponding to the destination terminal.

In another embodiment, if the first terminal is a relay terminal, after the first terminal obtains the first configuration information and the n+1 sets of second configuration information, the first terminal sends the second configuration information corresponding to each relay terminal in a hop-by-hop transmission manner, sends the second configuration information and the first configuration information corresponding to the source terminal, and sends the second configuration information and the first configuration information corresponding to the destination terminal.

And the relay terminal applies the second configuration information after receiving the corresponding second configuration information and replies an application result to the first terminal. This reply mode is implemented directly or indirectly. If the relay terminal is an adjacent terminal connected with the first terminal, directly replying to the first terminal; if the relay terminal is not a neighboring terminal connected to the first terminal, it is necessary to reply to the first terminal by means of hop-by-hop delivery.

The source terminal applies the second configuration information and the first configuration information after receiving the corresponding second configuration information and the first configuration information, and replies an application result to the first terminal. This reply mode is implemented directly or indirectly. If the source terminal is a neighboring terminal connected with the first terminal, directly replying to the first terminal; if the source terminal is not a neighboring terminal connected to the first terminal, it is necessary to reply to the first terminal by means of hop-by-hop delivery.

The destination terminal receives the corresponding second configuration information and the corresponding first configuration information, then applies the second configuration information and the corresponding first configuration information, and replies an application result to the first terminal. This reply mode is implemented directly or indirectly. If the destination terminal is a neighboring terminal connected with the first terminal, directly replying to the first terminal; if the destination terminal is not a neighboring terminal connected to the first terminal, it is necessary to reply to the first terminal by means of hop-by-hop delivery.

And the first terminal determines whether the sidelink communication is configured successfully or not according to the received application result. And if the first configuration information and the n+1 sets of second configuration information are determined to be configured successfully according to the received application result, determining that the communication configuration of the auxiliary link is successful, otherwise, determining that the communication configuration of the auxiliary link is failed.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by acquiring first information, where the first information includes configuration information for establishing a bearer of a secondary link communication, the configuration information includes the first configuration information and n+1 sets of second configuration information, and then, according to the first information, configuration information corresponding to other terminals except for the first terminal in the secondary link communication is sent to the other terminals, so that configuration of the bearer in U2U relay communication is implemented.

Based on the above embodiment, the method for obtaining the first information by the first terminal may be configured based on the network state of the first terminal, and in one implementation, as shown in fig. 4, step S310 includes:

s312, in a case where the first terminal is in an RRC Connected state (Connected), the first terminal receives a first message from a network side device, where the first message includes the first information.

The first message may be dedicated signaling, e.g. may be a radio resource control reconfiguration (RRC Reconfiguration) message. The first message may include first configuration information and n+1 sets of second configuration information.

Prior to step S312, the method further comprises:

s311, the first terminal sends a second message to the network side equipment, wherein the second message comprises the service information of the auxiliary link communication.

The second message may be a sidelink terminal information (sidelink terminal information nr) message.

In one embodiment, the service information of the sidelink communication includes at least one of:

a source layer 2 identifier (SourceLayer-2 ID) corresponding to the source terminal;

destination layer 2 identification (Destination Layer-2 ID) corresponding to the source terminal;

the source layer 2 identifier corresponding to the destination terminal is the same as the destination layer 2 identifier corresponding to the source terminal;

the destination layer 2 identifier corresponding to the destination terminal is the same as the source layer 2 identifier corresponding to the source terminal;

the source layer 2 identifiers corresponding to the N relay terminals, wherein each relay terminal can be used as a source L2 identifier of a next hop transmitting end;

n relay terminals correspond to the destination layer 2 identifiers, and each relay terminal can be used as the destination L2 identifier of the last hop receiving end;

The first target parameter is an end-to-end related target parameter;

n+1 sets of second target parameters, each set of second target parameters being target parameters related to each hop and being QoS parameters of each hop;

terminal type information for the first terminal informing the network side device of the terminal type information in the sub-link relay communication.

The target parameters may be set according to actual needs, and in one embodiment, qoS parameters (QoS parameters) may be included, which are exemplified in the following examples for simplicity.

The first target parameter may specifically be an end-to-end QoS parameter, where the end-to-end QoS parameter may be composed of QoS parameters of each hop, and the end-to-end QoS parameter is determined by QoS requirements of communications between a source terminal and a destination terminal.

Each set of second target parameters may specifically be QoS parameters of each hop, where the QoS parameters of each hop may be determined by QoS requirements of communication between terminals at both ends of each hop, for example: in case of n=1, the service information may include: a QoS parameter of a 0 th hop and a QoS parameter of a 1 st hop, wherein the QoS parameter of the 0 th hop is a QoS requirement decision of communication between a source terminal and a first hop relay terminal; the QoS parameter of the 1 st hop is determined for the QoS requirement of the communication between the first hop relay terminal and the destination terminal; in the case that N is greater than 1, the service information may include a QoS parameter of a 0 th hop, a QoS parameter of a 1 st hop, … …, and a QoS parameter of an nth hop, where the QoS parameter of the 0 th hop is determined by a QoS requirement of communication between the source terminal and the first hop relay terminal, the QoS parameter of the 1 st hop is determined by a QoS requirement of communication between the first hop relay terminal and the second hop relay terminal, and … …, and the QoS parameter of the nth hop is determined by a QoS requirement of communication between the nth hop relay terminal and the destination terminal.

The terminal type information may include: the terminal type information of the Source terminal, the destination terminal and the Relay terminal may be, for example, a Source terminal (Source UE) or a Remote terminal (Remote UE), and the Relay terminal may further distinguish whether it is a Relay terminal (U2U Relay UE) for UE-to-UE Relay communication or a Relay terminal (U2 NRelay UE) for UE-to-Network communication.

In another embodiment, as shown in fig. 5, step S310 includes:

s313, when the first terminal is in an RRC Inactive (Inactive) state or an Idle (Idle) state, the first terminal receives a third message from the network side device, wherein the third message comprises a mapping relation between configuration information and service information of a bearer for establishing the sidelink communication.

The third message may be a system information block 12 (System Information Block, sib 12) message.

S314, the first terminal obtains the first information according to the service information of the sub-link communication and the mapping relation.

In another embodiment, as shown in fig. 6, step S310 includes:

s315, when the first terminal is Out Of the network Coverage area (OOC), the first terminal acquires pre-configuration information from terminal pre-configuration, wherein the pre-configuration information comprises a mapping relationship between configuration information and service information for establishing a bearer Of the sidelink communication, and the pre-configuration information can be sidelink pre-configuration information (SL-pre-configuration NR);

S316, the first terminal obtains the first information according to the service information of the sub-link communication and the mapping relation.

In one embodiment, the S314 or S316 may include at least one of:

obtaining the first configuration information according to the first target parameter and the mapping relation, namely determining the end-to-end configuration information according to the end-to-end QoS parameter;

obtaining the second configuration information of the n+1 set according to the second target parameter of the n+1 set and the mapping relation, namely determining the configuration information corresponding to each hop according to the QoS parameter of each hop, for example, determining the configuration information corresponding to the first hop according to the QoS parameter of the first hop, and determining the configuration information corresponding to the second hop according to the QoS parameter of the second hop;

the first target parameters are end-to-end related target parameters, the second target parameters are target parameters related to each hop in the auxiliary link communication, each set of second target parameters corresponds to one hop corresponding to a source terminal or one hop corresponding to one of N relay terminals in the auxiliary link communication, and N is a positive integer. For simplicity of description, as described above, each hop in the sidelink communication may be numbered, and each set of second target parameters corresponds to a kth hop in the sidelink communication, where K is any integer less than or equal to N.

Based on the technical solutions of the foregoing embodiments, it can be known that in the embodiments of the present application, the first information is obtained by using different methods according to different network states of the first terminal, so that bearer configuration of the sub-link relay communication of the U2U can be flexibly implemented.

Based on the above embodiment, optionally, as shown in fig. 7, in a case where the first terminal is the source terminal, step S320 may include:

s321, the first terminal sends first configuration information to the destination terminal through a sidelink radio resource control process, wherein the first configuration information can be sent through a sidelink radio resource control reconfiguration (RRCRECONfigure Sidelink) message.

After step S321, the method further includes:

s331, the first terminal receives the configuration success message or the configuration failure message of the first configuration information from the destination terminal.

The destination terminal judges whether the first configuration information can be accepted or applied, if so, the destination terminal sends a configuration success message of the first configuration information to the first terminal, and specifically can send the configuration success message through a secondary link radio resource control reconfiguration complete (RRCRECONfigure complete SideLink) message; if the first configuration information is refused or can not be applied, the destination terminal sends a configuration failure message of the first configuration information to the first terminal, and the configuration failure message can be specifically a radio resource control reconfiguration failure (RRCRECONF failure) message.

S322, the wireless resource control process of the communication auxiliary link of the first terminal sends N+1 sets of second configuration information to the first hop relay terminal, wherein the N+1 sets of second configuration information can be sent through RRCRECONfigure Sidelink message; the first-hop relay terminal is a relay terminal connected with the first terminal.

For the first-hop relay terminal, after receiving the n+1 sets of second configuration information, the first-hop relay terminal determines 1 set of second configuration information corresponding to the 0 th hop from the n+1 sets of second configuration information. Then, transmitting the rest N sets of second configuration information except for 1 set of second configuration information corresponding to the 0 th hop relay terminal to a downstream terminal of the first hop relay terminal, wherein the downstream terminal of the first hop relay terminal is a target terminal under the condition that N=1; and under the condition that N is larger than 1, the downstream terminal of the first-hop relay terminal is a second-hop relay terminal, and the second-hop relay terminal continues to transmit to the downstream terminal.

In one embodiment, the first hop relay terminal may send the N sets of second configuration information to a downstream terminal of the first hop relay terminal after determining that the second configuration information corresponding to the first hop relay terminal may be accepted or applied. The second configuration information corresponding to the first hop relay terminal may include second configuration information corresponding to the 0 th hop and/or second configuration information corresponding to the 1 st hop.

For a Kth hop relay terminal, the Kth hop relay terminal may receive the n+2-K sets of second configuration information from a third terminal, and determine 1 set of second configuration information corresponding to the Kth hop. Then sending other n+1-K sets of second configuration information except for 1 set of second configuration information corresponding to the K-1 hop to a fourth terminal; wherein K is a positive integer less than or equal to N.

The third terminal can be a source terminal or an adjacent K-1 hop relay terminal;

the fourth terminal may be a destination terminal or an adjacent k+1th hop relay terminal.

In one embodiment, the kth hop relay terminal may send the n+1-K sets of second configuration information to the fourth terminal after determining that the second configuration information corresponding to the kth hop relay terminal may be accepted or applied. The second configuration information corresponding to the kth hop relay terminal may include: second configuration information corresponding to the Kth hop and/or second configuration information corresponding to the Kth hop.

After step S322, the method further comprises:

s332, the first terminal receives the configuration success message or the configuration failure message of the n+1 sets of second configuration information from the first hop relay terminal.

For a first-hop relay terminal, in an embodiment, the first-hop relay terminal may send a configuration success message of the n+1 set of second configuration information to the first terminal if the following condition is satisfied:

the first-hop relay terminal can accept or apply second configuration information corresponding to the first-hop relay terminal, and the first-hop relay terminal receives the configuration success message of the N sets of second configuration information sent by the downstream terminal.

In another embodiment, the first hop relay terminal may send the configuration failure message of the n+1 set of second configuration information to the first terminal if at least one of the following conditions is satisfied:

the rejection or the incapacitation of the first hop relay terminal to apply the second configuration information corresponding to the first hop relay terminal may include rejection or the incapacitation of the second configuration information corresponding to the 0 th hop and/or rejection or the incapacitation of the second configuration information corresponding to the 1 st hop;

the first-hop relay terminal receives configuration failure information of the N sets of second configuration information sent by a downstream terminal;

and any message sent by the downstream terminal is not received within a preset time.

For a kth hop relay terminal, in one embodiment, the kth hop relay terminal may send an n+2-K set of second configuration information configuration failure message to the third terminal if the following condition is satisfied:

the Kth hop relay terminal can accept or apply second configuration information corresponding to the Kth hop relay terminal, and the K hop relay terminal receives a successful configuration message of the N+1-K sets of second configuration information sent by a fourth terminal.

In another embodiment, the kth hop relay terminal may send an n+2-K set of second configuration information configuration failure message to the third terminal if at least one of the following conditions is satisfied:

the rejection or the incapacitation of the second configuration information corresponding to the Kth hop relay terminal by the Kth hop relay terminal can comprise the rejection or the incapacitation of the second configuration information corresponding to the Kth hop and/or the rejection or the incapacitation of the second configuration information corresponding to the Kth hop;

the Kth hop relay terminal receives the configuration failure message of the N+1-K sets of second configuration information sent by the fourth terminal;

and any message sent by the fourth terminal is not received within the preset time.

After steps S331 and/or S332, the method further comprises:

S341, in the case that the first terminal receives the configuration success message of the first configuration information from the target terminal and receives the configuration success message of the n+1 set of second configuration information from the first hop relay terminal, the first terminal determines that the sidelink communication configuration is successful.

Or,

s342, in the case that the first terminal receives the configuration failure message of the first configuration information from the target terminal and/or receives the configuration failure message of the n+1 set of second configuration information from the first hop relay terminal, the first terminal determines that the configuration of the sidelink communication fails.

In one embodiment, as shown in fig. 8, when the first terminal is a source terminal, the first terminal is in an RRC connected state, and n=1, the sidelink communication method includes the following steps:

A1. the source terminal sends a second message to the network side device, where the second message includes service information of the sidelink communication, and the second message may be a sidelinkueinformation nr message, as shown in step S311.

A2. The network side device sends a first message to the source terminal according to the second message, where the first message includes first configuration information, configuration information corresponding to the 0 th hop and configuration information corresponding to the 1 st hop, where the first information may be carried by the rrcrecon configuration message, as shown in step S312, the 0 th hop is a hop between the source terminal and the first hop relay terminal, and the 1 st hop is a hop between the first hop relay terminal and the destination terminal.

A3a, the source terminal sends 2 sets of second configuration information, namely, the configuration information corresponding to the 0 th hop and the configuration information corresponding to the 1 st hop, to the first hop relay terminal through the RRCRECONfigure configuration sip link message, and step S322 is performed.

And A4a, the first hop relay terminal sends the configuration information corresponding to the 1 st hop to the destination terminal through the RRCRECONfigure configuration Sidelink message under the condition that the configuration information corresponding to the 0 th hop is judged to be acceptable or applied.

A5a, the destination terminal sends RRCRECONfigure ComplemeSideLink to the first hop relay terminal to indicate that the configuration information corresponding to the 1 st hop is successfully configured under the condition that the configuration information corresponding to the 1 st hop is judged to be acceptable or applied.

A6a the first-hop relay terminal sends RRCRECONfigure ComplemeSideLink message to the source terminal to indicate that 2 sets of second configuration information are successfully configured under the condition that the 2 sets of second configuration information are successfully configured, and step S332 is performed.

A3b. the source terminal transmits the first configuration information to the destination terminal through the rrcrecon configuration sip link message as by step S321.

A4b. the destination terminal sends RRCRECONfigure CompleteSideLink to the source terminal to indicate that the first configuration information is successfully configured if the first configuration information is judged to be acceptable or applicable, as in step S331.

Steps A3a-A6a and A3b-A4b are not sequential.

And the source terminal determines that the bearer configuration of the sidelink communication is successful according to the steps A6a and A4b, and after the configuration is successful, the source terminal and the destination terminal can carry out NR sidelink unicast communication through the sidelink communication.

In another embodiment, as shown in fig. 9, when the first terminal is a source terminal, the first terminal is in an RRC connected state, and n=1, the sidelink communication method includes the following steps:

the methods B1-B4a are the same as those of A1-A4a shown in FIG. 8, and are not repeated here.

And B5a, under the condition that the destination terminal judges that the configuration information corresponding to the 1 st hop cannot be applied or refused, sending RRCRECONfigure FailureSINEDLK to the first hop relay terminal, wherein the RRCRECONfigure FaileSINEDLK is used for indicating the configuration failure of the configuration information corresponding to the 1 st hop.

B6a. the first hop relay terminal sends an rrcrecon configuration failure message to the source terminal, indicating 2 sets of second configuration information configuration failures, if it is determined that at least one of the following conditions is satisfied:

b3a, the first hop relay terminal refuses or can not apply the configuration information corresponding to the 0 th hop;

b5a, a first hop relay terminal receives RRCRECONfigure FailureIDLINK message sent by the destination terminal;

And 3, the first-hop relay terminal does not receive any message fed back by the destination terminal within preset time, wherein the message comprises RRCRECONGUSTRUCTORIESIDELINK message and RRCRECONGUSTRULACURIDUCINESINESINEK message.

B3B is identical to A3B shown in fig. 8, and will not be described here.

And B4B, under the condition that the first configuration information is refused or can not be applied, the destination terminal sends RRCRECONfigure FailureLIDINE to the source terminal, and the RRCRECONfigure FaileLIDINE is used for indicating the configuration failure of the first configuration information.

And the source terminal judges that the communication configuration of the auxiliary link fails according to at least one of the steps B6a and B4B.

In another embodiment, as shown in fig. 10, in the case that the first terminal is a source terminal, the first terminal is in an RRC inactive state or an idle state, and n=1, the sidelink communication method includes the following steps.

C1. The source terminal receives a third message from the network side device, where the third message may be an SIB12 message, and the third message includes a mapping relationship between configuration information and service information for establishing a bearer of the sidelink communication, as shown in step S313.

C2. And the source terminal acquires the first information according to the service information of the secondary link communication and the mapping relation, as shown in step S314.

Steps C3a-C4b are identical to steps A3a-A4b shown in fig. 8 and will not be described again here.

In another embodiment, as shown in fig. 11, in the case that the first terminal is a source terminal, the first terminal is in an OOC state, and n=1, the sidelink communication method includes the following steps.

D1. The source terminal obtains pre-configuration information from the terminal pre-configuration, where the pre-configuration information may be an SL-pre-configuration nr message, and the pre-configuration information includes a mapping relationship between configuration information and service information for establishing a bearer of the sidelink communication, as shown in step S315.

D2. And the source terminal acquires first information according to the service information of the secondary link communication and the mapping relation, wherein the first information is shown in step S316.

Steps D3a-D4b are identical to steps A3a-A4b shown in fig. 8 and will not be described again here.

In another embodiment, as shown in fig. 12, in the case that the first terminal is a source terminal, the first terminal is in an RRC inactive state or an idle state, and n=1, the sidelink communication method includes the following steps.

Steps E1-E2 are identical to steps C1-C2 in fig. 10 and are not described here.

Steps E3a-E4B are identical to steps B3a-B4B of fig. 9 and are not described here.

In another embodiment, as shown in fig. 13, in the case that the first terminal is a source terminal, the first terminal is in an OOC state, and n=1, the sidelink communication method includes the following steps.

Steps F1-F2 are the same as steps D1-D2 in fig. 11, and are not described here again.

Steps F3a-F4B are identical to steps B3a-B4B of fig. 9 and are not described here.

In another embodiment, as shown in fig. 14, when the first terminal is a source terminal, the first terminal is in an RRC connected state, and N is greater than 1, the sidelink communication method includes the following steps.

Compared to the solution shown in fig. 8.

G1. And the second message sent by the source terminal to the network side equipment comprises the service information of the auxiliary link communication, which is compared with A1, and QoS parameters corresponding to each hop and source layer 2 identifiers and destination layer 2 identifiers corresponding to the relay terminal of each hop are added.

G2. And the first message sent by the network side equipment to the source terminal is added with a plurality of sets of second configuration information compared with A2.

G3a—gia. The corresponding second configuration information is sent by the source terminal to the relay terminal of each hop by hop delivery.

G3a, the source terminal sends N+1 sets of second configuration information to the first hop relay terminal;

G4a, the first hop relay terminal sends N sets of second configuration information to the second hop relay terminal;

… … (hop-by-hop transfer)

The Nth hop relay terminal sends second configuration information corresponding to the destination terminal;

gic, the destination terminal sends a configuration success message of the second configuration information corresponding to the destination terminal to the Nth hop relay terminal.

… … (hop-by-hop transfer)

And G4c, if the second hop relay terminal judges that the configuration of the N sets of second configuration information is successful, sending a configuration success message of the N sets of second configuration information to the first hop relay terminal.

G3c, the first hop relay terminal judges that the configuration of the N sets of second configuration information is successful, and sends RRCRECONfigure complete Sidelink information to the source terminal, wherein the RRCRECONfigure complete Sidelink information is used for indicating that the configuration of the N+1 sets of second configuration information is successful.

G3b-G4b are identical to steps A3b-A4b of FIG. 8 and are not described here.

And the source terminal determines that the bearer configuration of the sidelink communication is successful according to the steps G6a and G4b, and after the configuration is successful, the source terminal and the destination terminal can carry out NR sidelink unicast communication through the sidelink communication.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by sending the first configuration information to the destination terminal and transferring the second configuration information to the relay terminal hop by hop, the bearer configuration of the sub-link relay communication of the U2U is implemented under the condition that the first terminal is the source terminal.

Based on the above embodiment, optionally, as shown in fig. 15, in a case where the first terminal is one of the N relay terminals and the n=1, the first terminal will send corresponding configuration information to the source terminal and the destination terminal, respectively, and step S320 includes:

s323, the first terminal sends the first configuration information and second configuration information corresponding to the source terminal through a sidelink radio resource control process.

After step S323, the method further includes:

s333, the first terminal receives a configuration success message or a configuration failure message of the first configuration information and the second configuration information from a source terminal.

The source terminal judges whether the first configuration information and the second configuration information corresponding to the 0 th hop can be accepted or applied, and if the source terminal judges that the first configuration information and the second configuration information corresponding to the 0 th hop can be accepted or applied, the source terminal sends a configuration success message of the first configuration information and the second configuration information corresponding to the 0 th hop to the first terminal, and the configuration success message can be specifically sent through an RRCRECONfigure CompleteSidelink message; if the first configuration information is refused or the second configuration information corresponding to the 0 th hop is refused or the second configuration information is not applicable, the source terminal sends the first configuration information and the configuration failure message of the second configuration information corresponding to the 0 th hop to the first terminal, and the configuration failure message can be specifically sent through an RRCRECONF configuration FailureLIDINE message.

S324, the first terminal sends the first configuration information and the second configuration information corresponding to the 1 st hop to a destination terminal through a sidelink radio resource control process.

After step S324, the method further comprises:

s334, the first terminal receives a configuration success message or a configuration failure message of the first configuration information and the second configuration information from a target terminal.

The destination terminal judges whether the first configuration information and the second configuration information corresponding to the 1 st hop can be accepted or applied, and if the first configuration information and the second configuration information corresponding to the 1 st hop can be accepted or applied, the destination terminal sends a configuration success message of the first configuration information and the second configuration information corresponding to the 1 st hop to the first terminal, and the configuration success message can be specifically sent through an RRCRECONF configuration CompleteSidelink message; if the first configuration information is refused or the second configuration information corresponding to the 1 st hop is refused or the second configuration information is not applicable, the destination terminal sends the first configuration information and the configuration failure message of the second configuration information corresponding to the 1 st hop to the first terminal, and the configuration failure message can be specifically sent through an RRCRECONF configuration FailureLIDINE message.

After step S333 and/or S334, the method further comprises:

s343, in the case that the first terminal receives the configuration success message of the first configuration information and the second configuration information from a source terminal and receives the configuration success message of the first configuration information and the second configuration information from a target terminal, the first terminal determines that the sidelink communication configuration is successful;

or,

s344, in a case where the first terminal receives the configuration failure message of the first configuration information and the second configuration information from the source terminal and/or receives the configuration failure message of the first configuration information and the second configuration information from the target terminal, the first terminal determines that the sidelink communication configuration fails.

In the case that the first terminal determines that the sidelink communication configuration fails, the method further includes:

and the first terminal sends the configuration failure event of the sidelink communication to a source terminal.

In one embodiment, as shown in fig. 16, when the first terminal is one of the N relay communications and the first terminal is in an RRC connected state, where n=1, that is, only the first hop relay terminal is included, the sidelink communication method includes the following steps:

H1. The first-hop relay terminal sends a second message to the network side device, where the second message includes service information of the sidelink communication, and the second message may be a sidelinkueinformation nr message, as shown in step S311.

H2. The network side device sends a first message to the first hop relay terminal according to the second message, where the first message includes first configuration information, configuration information corresponding to the 0 th hop and configuration information corresponding to the 1 st hop, where the first information may be carried by the rrcrecon configuration message, as shown in step S312, the 0 th hop is a hop between the source terminal and the first hop relay terminal, and the 1 st hop is a hop between the 1 st hop relay terminal and the destination terminal.

H3a the first hop relay terminal sends the first configuration information and the configuration information corresponding to the 0 th hop to the source terminal through the RRCRECONfigure Sidelink message, as shown in step S323.

H4a, the source terminal sends RRCRECONfigure ComplemeSideLink to the first hop relay terminal under the condition that the first configuration information and the configuration information corresponding to the 0 th hop are acceptable or applied, so as to indicate that the configuration of the first configuration information and the configuration information corresponding to the 0 th hop is successful, and step S333 is performed.

H3b the first hop relay terminal transmits the first configuration information and the configuration information corresponding to the 1 st hop to the destination terminal through the RRCRECONfigure Sidelink message, as shown in step S324.

And H4b, the destination terminal sends RRCRECONfigure complete Sidelink to the first hop relay terminal under the condition that the first configuration information and the configuration information corresponding to the 1 st hop are acceptable or applied, and the RRCRECONfigure complete Sidelink is used for indicating that the first configuration information is configured successfully, and the step S334 is performed.

Steps H3a and H3b are not sequential nor are steps H4a and H4b.

The first hop relay terminal determines that the bearer configuration of the sidelink communication is successful according to the steps H4a and H4b, and after the configuration is successful, the source terminal and the destination terminal can perform NR sidelink unicast communication through the sidelink communication.

In another embodiment, as shown in fig. 17, when the first terminal is one of the N relay communications and the first terminal is in an RRC connected state, where n=1, the sidelink communication method includes the steps of:

I1-I3b are the same as H1-H3b shown in FIG. 16, and are not described here.

And H4a, under the condition that the source terminal judges that the first configuration information and/or the configuration information corresponding to the 0 th hop cannot be applied, the source terminal sends RRCRECONfigure FailureStylink to the first hop relay terminal, and the RRCRECONfigure FaileStylink is used for indicating that the configuration of the first configuration information and/or the configuration information corresponding to the 0 th hop fails.

And H4b, under the condition that the destination terminal judges that the first configuration information and/or the configuration information corresponding to the 1 st hop cannot be applied, sending RRCRECONfigure FaileStyle to the first hop relay terminal, wherein the RRCRECONfigure FaileStyle is used for indicating that the configuration of the first configuration information and/or the configuration information corresponding to the 1 st hop fails.

The first-hop relay terminal determines that the sidelink communication configuration fails when judging that at least one of the following conditions is met:

based on the step H4a, receiving RRCReconfigurationFailureside link from a source terminal;

based on the step H4b, receiving RRCReconfigurationFailureside from the destination terminal;

the method comprises the following steps of 3, not receiving any message from a source terminal within preset time, wherein the message comprises RRCRECONGUSTRUCTUREMENT SideLink message and RRCRECONGUSTRUCTUReSILIDINE message;

and 4, not receiving any message from the destination terminal within preset time, wherein the message comprises RRCRECONGUSTRUCTORIENSILLESideLink message and RRCRECONGUSTRUCTORASIDELINK message.

In another embodiment, as shown in fig. 18, in a case where the first terminal is one of the N relay communications, the first terminal is in an RRC inactive state or an idle state, and n=1, the sidelink communication method includes the following steps.

J1. The first relay terminal receives a third message from the network side device, where the third message may be an SIB12 message, and the third message includes a mapping relationship between configuration information and service information for establishing a bearer of the sidelink communication, as shown in step S313.

J2. The first relay terminal obtains the first information according to the service information of the sidelink communication and the mapping relation, as shown in step S314.

Steps J3a-J4a are identical to H3a-H4a shown in fig. 16 and are not described here.

In another embodiment, as shown in fig. 19, in a case where the first terminal is one of the N relay communications, the first terminal is in an OOC state, and the n=1, the sidelink communication method includes the following steps.

K1. The first relay terminal obtains pre-configuration information from terminal pre-configuration, where the pre-configuration information may be an SL-pre-configuration nr message, where the pre-configuration information includes a mapping relationship between configuration information and service information for establishing a bearer of the sidelink communication, as shown in step S315.

K2. The first relay terminal obtains first information according to the service information of the sidelink communication and the mapping relation, as shown in step S316.

Steps K3a-K4a are identical to H3a-H4a shown in fig. 16 and will not be described again here.

In another embodiment, as shown in fig. 20, in a case where the first terminal is one of the N relay communications, the first terminal is in an RRC inactive state or an idle state, and n=1, the sidelink communication method includes the following steps.

L1-L3b are the same as J1-J3b in FIG. 18, and are not described here.

L4b and L4a are the same as I4b and I4a in fig. 17, and are not described here again.

In another embodiment, as shown in fig. 21, in a case where the first terminal is one of the N relay communications, the first terminal is in an OOC state, and the n=1, the sidelink communication method includes the following steps.

M1-M3b are identical to the method of K1-K3b in FIG. 19 and are not described here again

M4b and M4a are identical to I4b and I4a in FIG. 17 and are not described here.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by sending, to a source terminal and a destination terminal, first configuration information and second configuration information corresponding to the first configuration information, respectively, bearer configuration of the sidelink relay communication of the U2U is implemented when the first terminal is the source terminal.

Based on the above embodiment, optionally, as shown in fig. 22, in a case where the first terminal is one of the N relay terminals and the N is greater than 1, the first terminal will send corresponding configuration information to an upstream link and a downstream link, respectively, and the step S320 includes at least one of:

S325, the first terminal sends M1+1 sets of second configuration information and the first configuration information corresponding to an upstream link of the first terminal to a first upstream terminal through a sidelink radio resource control process.

The upstream link of the first terminal comprises M1 relay terminals and a source terminal between the source terminal and the first terminal, the downstream link of the first terminal comprises M2 relay terminals and a destination terminal between the first terminal and the destination terminal, M1 and M2 are integers which are larger than or equal to 0, M1+M2=N-1, and the first upstream terminal is a relay terminal or a source terminal connected with the first terminal in the upstream link of the first terminal.

After step S325, the method further comprises:

s335, the first terminal receives a configuration success message or a configuration failure message of M1+1 sets of second configuration information and the first configuration information corresponding to an upstream link of the first terminal from a first upstream terminal.

For a kth hop relay terminal, in one embodiment, in a case where the kth hop relay terminal is located on an upstream link of the first terminal, the kth hop relay terminal will receive k+1 sets of second configuration information and first configuration information from a kth+1 hop relay terminal;

The Kth hop relay terminal sends the rest K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the Kth hop to a fourth terminal;

the method comprises the steps that when the Kth hop relay terminal judges that second configuration information corresponding to the Kth hop can be applied, K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the Kth hop relay terminal are sent to the fourth terminal;

the fourth terminal is a K-1 hop relay terminal or a source terminal.

In one embodiment, the kth hop relay terminal may send the configuration success message of the k+1 set of second configuration information and the first configuration information to the kth+1 hop relay terminal if the following condition is satisfied:

the Kth hop relay terminal can accept or apply 1 set of second configuration information corresponding to the Kth hop, and the Kth hop relay terminal receives the configuration success message of the K sets of second configuration information and the first configuration information from the fourth terminal.

In another embodiment, the kth hop relay terminal may send the configuration failure message of the k+1 set of second configuration information and the first configuration information to the kth+1 hop relay terminal if at least one of the following conditions is satisfied:

The Kth hop relay terminal refuses or can not apply 1 set of second configuration information corresponding to the Kth hop;

the Kth hop relay terminal receives the configuration failure message of the K sets of second configuration information and the first configuration information from a fourth terminal;

no message is received from the fourth terminal within a preset time.

S326, the first terminal sends the M2+1 sets of second configuration information and the first configuration information corresponding to the downstream link of the first terminal to the first downstream terminal through a sidelink radio resource control process.

The first downstream terminal is a relay terminal or a destination terminal connected with the first terminal in a downstream link of the first terminal.

After step S326, the method further includes:

s336, the first terminal receives a configuration success message or a configuration failure message of the M2+1 sets of second configuration information and the first configuration information corresponding to the downstream link of the first terminal from the first downstream terminal.

For a kth hop relay terminal, in one embodiment, in a case that the kth hop relay terminal is located on a downstream link of the first terminal, the kth hop relay terminal receives n+2-K sets of second configuration information and the first configuration information from a kth-1 hop relay terminal;

The Kth hop relay terminal sends the rest of N+1-K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the Kth hop to a fourth terminal;

the method comprises the steps that when the Kth hop relay terminal judges that second configuration information corresponding to the Kth hop can be applied, the rest of N+1-K sets of second configuration information and first configuration information except 1 set of second configuration information corresponding to the Kth hop relay terminal are sent to the fourth terminal;

the fourth terminal is a K+1th hop relay terminal or a destination terminal.

In one embodiment, the kth hop relay terminal may send the configuration success message of the n+2-K set of second configuration information and the first configuration information to the kth-1 hop relay terminal if the following condition is satisfied:

the Kth hop relay terminal can accept or apply 1 set of second configuration information corresponding to the Kth hop, and the Kth hop relay terminal receives the configuration success message of the N+1-K sets of second configuration information and the first configuration information from a fourth terminal.

In another embodiment, the kth hop relay terminal may send the configuration failure message of the n+2-K set of second configuration information and the first configuration information to the kth-1 hop relay terminal if at least one of the following conditions is satisfied:

The Kth hop relay terminal refuses or cannot apply 1 set of second configuration information corresponding to the Kth hop;

the K-hop relay terminal receives the configuration failure message of the N+1-K sets of second configuration information and the first configuration information from a fourth terminal;

no message is received from the fourth terminal within a preset time.

After steps S335 and/or S336, the method further comprises:

s345, under the condition that the first terminal receives a configuration success message of M1+1 sets of second configuration information and the first configuration information corresponding to an upstream link of the first terminal from the first upstream terminal, and receives a configuration success message of M2+1 sets of second configuration information and the first configuration information corresponding to the upstream link of the first terminal from the first downstream terminal, the first terminal determines that the sidelink communication configuration is successful;

or,

s346, in a case where the first terminal receives, from the first upstream terminal, an m1+1 set of second configuration information corresponding to the upstream link of the first terminal and a configuration failure message of the first configuration information, and/or receives, from the first downstream terminal, an m2+1 set of second configuration information corresponding to the upstream link of the first terminal and a configuration failure message of the first configuration information, the first terminal determines that the sidelink communication configuration fails.

In one embodiment, as shown in fig. 23, when the first terminal is one of N relay terminals, taking the first terminal as a first hop relay terminal as an example, the first terminal is in an RRC connected state, and N is greater than 1, the sidelink communication method includes the following steps.

Compared with the solution shown in fig. 16.

N1. the first-hop relay terminal sends a second message to the network side device, wherein the service information of the sidelink communication included in the second message is increased by QoS parameters corresponding to more hops and source layer 2 identifiers and destination layer 2 identifiers corresponding to the relay terminals with more hops compared with H1.

And N2, adding a plurality of sets of second configuration information by the first message sent by the network side equipment to the first-hop relay terminal compared with H2.

N3a the first hop relay terminal sends the first configuration information and the second configuration information corresponding to the 0 th hop to the source terminal.

N3b-nib, the first hop relay terminal transmits the corresponding second configuration information and the first configuration information to each relay terminal and destination terminal of the downstream link in a hop-by-hop transmission mode.

N3b. the first hop relay terminal sends N sets of second configuration information and first configuration information to the second hop relay terminal;

… … (hop-by-hop transfer)

The Nib, the Nth hop relay terminal sends second configuration information and first configuration information corresponding to the Nth hop to the destination terminal;

and the destination terminal sends a configuration success message of the second configuration information and the first configuration information corresponding to the Nth hop relay terminal.

……

And N3c, the second-hop relay terminal sends an RRCRECONfigure CompleteSideLink message to the first-hop relay terminal, and the RRCRECONfigure CompleteSideLink message is used for indicating that the N sets of second configuration information and the first configuration information are successfully configured.

And N4a, the source terminal sends the configuration success message of the second configuration information and the first configuration information corresponding to the 0 th hop to the first hop relay terminal.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by sending corresponding second configuration information and first configuration information to an upstream link and a downstream link respectively, bearer configuration of a secondary link relay communication of U2U is implemented when the first terminal is a relay terminal.

In the relay communication method provided in the embodiment of the present application, the execution subject may be a relay communication device. In the embodiment of the present application, a relay communication device that executes a relay communication method is taken as an example, and the relay communication device provided in the embodiment of the present application is described.

As shown in fig. 24, the relay communication apparatus includes: a first transmission module 2401 and a first configuration module 2402.

The first transmission module 2401 is configured to obtain first information, where the first information includes configuration information for establishing a bearer of the sidelink communication; the first configuration module 2402 is configured to send configuration information corresponding to other terminals except the first terminal in the sidelink communication to the other terminals according to the first information; wherein the relay communication device is a source terminal in the sidelink communication or one of N relay terminals in the sidelink communication; the first information comprises first configuration information and n+1 sets of second configuration information, the first configuration information is end-to-end configuration information in the carried configuration information, the second configuration information is configuration information corresponding to each hop in the carried configuration information, each set of second configuration information corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in the sidelink communication, and N is a positive integer.

Optionally, the first configuration information includes at least one of:

end-to-end sidelink radio bearer identification;

the source terminal and the destination terminal are configured by a peer-to-peer sidelink service data adaptation protocol entity;

and configuring the peer-to-peer sub-link packet data convergence protocol entity of the source terminal and the destination terminal.

Optionally, the second configuration information of the 0 th hop includes at least one of:

Optionally, the second configuration information of the nth hop includes at least one of:

Optionally, the second configuration information of the J-th hop includes at least one of:

J is a positive integer greater than 1 and less than N.

Based on the foregoing embodiment, optionally, the first transmission module 2401 is configured to receive, in an RRC connected state, a first message from a network side device, where the first message includes the first information.

Optionally, the first transmission module 2401 is further configured to send a second message to the network side device, where the second message includes service information of the sidelink communication.

Optionally, the first transmission module 2401 is configured to:

receiving a third message from the network side equipment under the condition of being in an RRC inactive state or an idle state, wherein the third message comprises a mapping relation between configuration information and service information of a bearer used for establishing the sidelink communication;

and obtaining the first information according to the service information of the secondary link communication and the mapping relation.

Optionally, the first transmission module 2401 is configured to:

under the condition that the communication terminal is out of a network coverage area, pre-configuration information is acquired from terminal pre-configuration, wherein the pre-configuration information comprises a mapping relation between configuration information and service information of a bearer used for establishing the auxiliary link communication;

Optionally, the first transmission module 2401 is configured to perform at least one of:

obtaining the first configuration information according to a first target parameter and the mapping relation;

obtaining the second configuration information of the n+1 sets according to the second target parameters of the n+1 sets and the mapping relation;

the first target parameters are end-to-end related target parameters, the second target parameters are target parameters related to each hop in the sidelink communication, and each set of second target parameters corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in the sidelink communication.

Optionally, the service information of the sidelink communication includes at least one of:

a source layer 2 identifier corresponding to a source terminal;

a destination layer 2 identifier corresponding to the source terminal;

a source layer 2 identifier corresponding to the destination terminal;

a destination layer 2 identifier corresponding to the destination terminal;

the source layer 2 identifiers corresponding to the N relay terminals;

the destination layer 2 identifiers corresponding to the N relay terminals;

the first target parameter is an end-to-end related target parameter;

n+1 sets of second target parameters, each set of second target parameters being target parameters related to each hop;

terminal type information.

Optionally, the target parameter comprises a QoS parameter.

Based on the above embodiment, optionally, in a case where the relay communication device is the source terminal, the first configuration module 2402 is configured to perform at least one of:

transmitting first configuration information to the destination terminal through a sidelink radio resource control process;

the communication auxiliary link wireless resource control process sends n+1 sets of second configuration information to the first hop relay terminal; the first-hop relay terminal is a relay terminal connected with the first terminal.

Optionally, the first transmission module 2401 is further configured to receive a configuration success message or a configuration failure message of the first configuration information from the destination terminal.

Optionally, the first transmission module 2401 is further configured to receive a configuration success message or a configuration failure message of the n+1 set of second configuration information from the first hop relay terminal.

Optionally, the first configuration module 2402 is further configured to:

Determining that the secondary link communication configuration is successful in the case of receiving a configuration success message of the first configuration information from the target terminal and receiving a configuration success message of the n+1 set of second configuration information from the first hop relay terminal;

or,

and determining that the sidelink communication configuration fails under the condition that the configuration failure message of the first configuration information is received from the target terminal and/or the configuration failure message of the n+1 set of second configuration information is received from the first hop relay terminal.

Based on the above embodiment, optionally, in a case where the relay communication device is one of the N relay terminals and the n=1, the first configuration module 2402 is configured to:

transmitting the first configuration information and second configuration information corresponding to the source terminal through a sidelink radio resource control process;

And sending the first configuration information and the second configuration information corresponding to the target terminal through a sidelink radio resource control process.

Optionally, the first transmission module 2401 is further configured to:

receiving a configuration success message or a configuration failure message of the first configuration information and the second configuration information from a source terminal;

and receiving a configuration success message or a configuration failure message of the first configuration information and the second configuration information from the target terminal.

Optionally, the first configuration module 2402 is further configured to:

determining that the sidelink communication configuration is successful in a case of receiving a configuration success message of the first configuration information and the second configuration information from a source terminal and receiving a configuration success message of the first configuration information and the second configuration information from a target terminal;

or,

the secondary link communication configuration failure is determined in a case of receiving a configuration failure message of the first configuration information and the second configuration information from a source terminal and/or receiving a configuration failure message of the first configuration information and the second configuration information from a target terminal.

Based on the above embodiment, optionally, in a case where the relay communication device is one of the N relay terminals and the N is greater than 1, the first configuration module 2402 is configured to perform at least one of:

transmitting M1+1 sets of second configuration information and the first configuration information corresponding to an upstream link of a first terminal to the first upstream terminal through a secondary link radio resource control process;

transmitting M2+1 sets of second configuration information and the first configuration information corresponding to a downstream link of a first terminal to the first downstream terminal through a secondary link radio resource control process;

the upstream link of the relay communication device comprises M1 relay terminals and a source terminal between a source terminal and a first terminal, the first upstream terminal is a relay terminal or a source terminal connected with the relay communication device in the upstream link, the downstream link comprises M2 relay terminals and a destination terminal between the relay communication device and the destination terminal, the first downstream terminal is a relay terminal or a destination terminal connected with the relay communication device in the downstream link, M1 and M2 are integers larger than or equal to 0, and M1+M2=N-1.

Optionally, the first transmission module 2401 is further configured to perform at least one of:

Receiving a configuration success message or a configuration failure message of M1+1 sets of second configuration information corresponding to an upstream link and the first configuration information from a first upstream terminal;

and receiving a configuration success message or a configuration failure message of the M2+1 sets of second configuration information and the first configuration information corresponding to the downstream link from the first downstream terminal.

Optionally, the first configuration module 2402 is further configured to:

determining that the secondary link communication configuration is successful when receiving a configuration success message of the m1+1 set of second configuration information and the first configuration information corresponding to the upstream link from the first upstream terminal and receiving a configuration success message of the m2+1 set of second configuration information and the first configuration information corresponding to the upstream link from the first downstream terminal;

or,

and determining that the secondary link communication configuration fails under the condition that the configuration failure message of the M1+1 set of second configuration information and the first configuration information corresponding to the upstream link is received from the first upstream terminal and/or the configuration failure message of the M2+1 set of second configuration information and the first configuration information corresponding to the upstream link is received from the first downstream terminal.

Optionally, the first configuration module 2402 is further configured to send a configuration failure event of the sidelink communication to a source terminal.

The relay communication device in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in an electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The relay communication device provided in the embodiment of the present application can implement each process implemented by the embodiments of the methods of fig. 2 to 23, and achieve the same technical effects, so that repetition is avoided, and no further description is given here.

As shown in fig. 25, the embodiment of the present application also provides a relay communication method, where the execution subject of the method is the second terminal, in other words, the method may be executed by software or hardware installed in the second terminal. The method comprises the following steps:

S2510, the second terminal receives L sets of second configuration information and first configuration information from the third terminal, and determines 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal from the L sets of second configuration information;

s2520, the second terminal sends the rest L-1 sets of second configuration information and first configuration information except 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal to a fourth terminal;

Optionally, the third terminal and the first terminal are both source terminals, and the second terminal is a first hop relay terminal, and step S2510 includes:

the first hop relay terminal receives N+1 sets of second configuration information and the first configuration information from a source terminal;

the first hop relay terminal sends the remaining L-1 sets of second configuration information and first configuration information except 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal to a fourth terminal, and the method comprises any one of the following steps:

the second terminal sends the rest N sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the K-1 hop to the fourth terminal;

The second terminal sends N sets of second configuration information except 1 set of second configuration information corresponding to the K-1 hop to the fourth terminal under the condition that the second terminal judges that the second configuration information corresponding to the first hop relay terminal can be applied;

the fourth terminal is a second-hop relay terminal or a destination terminal.

Optionally, the third terminal is a kth-1 hop relay terminal, and step S2510 includes:

the Kth hop relay terminal receives the second configuration information of the N+2-K sets and the first configuration information from the Kth hop relay terminal;

the second terminal sends the remaining L-1 sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal to a fourth terminal, and the method comprises any one of the following steps:

the method comprises the steps that when the Kth hop relay terminal judges that second configuration information corresponding to the Kth hop relay terminal can be applied, the rest of N+1-K sets of second configuration information and first configuration information except 1 set of second configuration information corresponding to the Kth hop are sent to the fourth terminal;

The fourth terminal is a K+1th hop relay terminal or a destination terminal.

Optionally, the third terminal is a k+1 hop relay terminal, and step S2510 includes:

the Kth hop relay terminal receives K+1 sets of second configuration information and first configuration information from the Kth+1 hop relay terminal;

the method comprises the steps that under the condition that the Kth hop relay terminal judges that second configuration information corresponding to the Kth hop relay terminal can be applied, K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the Kth hop are sent to the fourth terminal;

the fourth terminal is a K-1 hop relay terminal or a source terminal.

Optionally, step S2520 includes:

in the case that the second configuration information corresponding to the second terminal is determined to be successfully applied and a configuration success message for the L-1 set of second configuration information and the first configuration information is received from the fourth terminal, the second terminal sends the configuration success message for the L set of second configuration information and the first configuration information to the third terminal;

Or,

and under the condition that the second configuration information corresponding to the second terminal is not successfully applied and/or a configuration failure message aiming at the L-1 set of second configuration information and the first configuration information is received from the fourth terminal, the second terminal sends the configuration failure message aiming at the L set of second configuration information and the first configuration information to the third terminal.

It should be noted that, determining that the second configuration information corresponding to the second terminal is successfully applied may specifically include at least one of the following:

judging that second configuration information corresponding to the second terminal can be accepted or applied;

and the second configuration information corresponding to the second terminal is already applied.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by receiving L sets of second configuration information and first configuration information from a third terminal, sending, to a fourth terminal, L-1 sets of second configuration information and first configuration information except for 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal, an effect of a relay terminal in a bearer configuration process of a sidelink relay communication is clarified, and bearer configuration of a sidelink relay communication of U2U is realized.

As shown in fig. 26, the relay communication apparatus includes: a second transmission module 2601 and a second configuration module 2602.

The second transmission module 2601 is configured to receive L sets of second configuration information and first configuration information from a third terminal, and determine 1 set of second configuration information corresponding to the relay communication device from the L sets of second configuration information; the second configuration module 2602 is configured to send, to a fourth terminal, L-1 sets of second configuration information and first configuration information except 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal;

Optionally, the third terminal and the first terminal are both source terminals, the relay communication device is a first-hop relay terminal, and the second transmission module 2601 is configured to:

receiving n+1 sets of second configuration information and the first configuration information from a source terminal;

the second configuration module 2602 is configured to perform any one of the following:

transmitting the rest N sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the K-1 hop to the fourth terminal;

transmitting N sets of second configuration information except 1 set of second configuration information corresponding to the K-1 hop to the fourth terminal under the condition that the second configuration information corresponding to the first hop relay terminal can be applied;

The fourth terminal is a second-hop relay terminal or a destination terminal.

Optionally, the third terminal is a kth-1 hop relay terminal, and the second transmission module 2601 is configured to:

receiving N+2-K sets of second configuration information and the first configuration information from a K-1 hop relay terminal;

transmitting the rest of the N+1-K sets of second configuration information and the first configuration information except for 1 set of second configuration information corresponding to the K-1 hop to a fourth terminal;

under the condition that the second configuration information corresponding to the relay communication device can be applied is judged, the rest of N+1-K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the K-1 hop are sent to the fourth terminal;

the fourth terminal is a K+1th hop relay terminal or a destination terminal.

Optionally, the third terminal is a k+1 hop relay terminal, and the second transmission module 2601 is configured to:

receiving K+1 sets of second configuration information and first configuration information from the K+1 hop relay terminal;

transmitting the rest K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the Kth hop to a fourth terminal;

If the condition that the second configuration information corresponding to the relay communication device can be applied is judged, transmitting the rest K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the Kth hop to the fourth terminal;

the fourth terminal is a K-1 hop relay terminal or a source terminal.

Optionally, the second configuration module 2602 is configured to:

if it is determined that the second configuration information corresponding to the relay communication device is successfully applied and a configuration success message for the L-1 set of second configuration information and the first configuration information is received from the fourth terminal, sending the configuration success message for the L set of second configuration information and the first configuration information to the third terminal;

or,

and sending a configuration failure message for the L-1 set of second configuration information and the first configuration information to the third terminal under the condition that the second configuration information corresponding to the relay communication device is not successfully applied and/or the configuration failure message for the L-1 set of second configuration information and the first configuration information is received from the fourth terminal.

The relay communication device provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 25, and achieve the same technical effects, so that repetition is avoided, and no further description is given here.

Optionally, as shown in fig. 27, the embodiment of the present application further provides a communication device 2700, including a processor 2701 and a memory 2702, where a program or an instruction that can be executed on the processor 2701 is stored in the memory 2702, and when the communication device 2700 is a terminal, for example, the program or the instruction is executed by the processor 2701 to implement each step of the foregoing embodiment of the relay communication method, and the same technical effects can be achieved. When the communication device 2700 is a network side device, the program or the instruction, when executed by the processor 2701, implements the steps of the foregoing relay communication method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and detailed description is omitted here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the processor is used for acquiring first information according to the first information, the first information comprises configuration information for establishing a bearer of the sidelink communication, and the configuration information is sent to other terminals except the first terminal in the sidelink communication and corresponds to the other terminals. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 28 is a schematic hardware structure of a first terminal for implementing an embodiment of the present application.

The terminal 2800 includes, but is not limited to: at least some of the components of the radio frequency unit 2801, the network module 2802, the audio output unit 2803, the input unit 2804, the sensor 2805, the display unit 2806, the user input unit 2807, the interface unit 2808, the memory 2809, the processor 2810, and the like.

Those skilled in the art will appreciate that the terminal 2800 may further include a power source (e.g., a battery) for powering the various components, and the power source may be logically connected to the processor 2810 by a power management system so as to perform functions such as managing charging, discharging, and power consumption by the power management system. The terminal structure shown in fig. 28 is not limited to the first terminal, and the first terminal may include more or less components than those shown, or may combine some components, or may be arranged in different components, which will not be described herein.

It should be appreciated that in embodiments of the present application, the input unit 2804 may include a graphics processing unit (Graphics Processing Unit, GPU) 28041 and a microphone 28042, with the graphics processor 28041 processing image data of still pictures or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 2806 may include a display panel 28061, and the display panel 28061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 2807 includes at least one of a touch panel 28071 and other input devices 28072. The touch panel 28071 is also referred to as a touch screen. The touch panel 28071 can include two parts, a touch detection device and a touch controller. Other input devices 28072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In this embodiment, after receiving downlink data from the network side device, the radio frequency unit 2801 may transmit the downlink data to the processor 2810 for processing; in addition, the radio frequency unit 2801 may send uplink data to the network side device. In general, radio frequency unit 2801 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low noise amplifiers, diplexers, and the like.

Memory 2809 may be used to store software programs or instructions and various data. The memory 2809 may mainly include a first memory area storing programs or instructions and a second memory area storing data, where the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 2809 may include volatile memory or nonvolatile memory, or the memory 2809 may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 2809 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 2810 may include one or more processing units; optionally, the processor 2810 integrates an application processor that primarily handles operations related to the operating system, user interface, application programs, etc., and a modem processor that primarily handles wireless communication signals, such as a baseband processor. It is to be appreciated that the modem processor described above may not be integrated into the processor 2810.

The radio frequency unit 2801 is configured to obtain first information, where the first information includes configuration information for establishing a bearer of the sidelink communication;

the processor 2810 is configured to send configuration information corresponding to other terminals except the first terminal to the other terminals in the sidelink communication according to the first information; wherein the relay communication device is a source terminal in the sidelink communication or one of N relay terminals in the sidelink communication; the first information comprises first configuration information and n+1 sets of second configuration information, the first configuration information is end-to-end configuration information in the carried configuration information, the second configuration information is configuration information corresponding to each hop in the carried configuration information, each set of second configuration information corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in the sidelink communication, and N is a positive integer.

Optionally, the first configuration information includes at least one of:

end-to-end sidelink radio bearer identification;

J is a positive integer greater than 1 and less than N.

Based on the above embodiment, optionally, the radio frequency unit 2801 is configured to receive, in an RRC connected state, a first message from a network side device, where the first message includes the first information.

Optionally, the radio frequency unit 2801 is further configured to send a second message to the network side device, where the second message includes service information of the sidelink communication.

Optionally, the radio frequency unit 2801 is configured to:

Optionally, the radio frequency unit 2801 is configured to perform at least one of:

a source layer 2 identifier corresponding to a source terminal;

a destination layer 2 identifier corresponding to the source terminal;

a source layer 2 identifier corresponding to the destination terminal;

a destination layer 2 identifier corresponding to the destination terminal;

the source layer 2 identifiers corresponding to the N relay terminals;

the destination layer 2 identifiers corresponding to the N relay terminals;

the first target parameter is an end-to-end related target parameter;

terminal type information.

Optionally, the target parameter comprises a QoS parameter.

Optionally, the radio frequency unit 2801 is further configured to receive a configuration success message or a configuration failure message of the first configuration information from the destination terminal.

Optionally, the radio frequency unit 2801 is further configured to receive a configuration success message or a configuration failure message of the n+1 set of second configuration information from the first hop relay terminal.

Optionally, the processor 2810 is further configured to:

or,

Based on the above embodiment, optionally, in a case where the relay communication device is one of the N relay terminals and the n=1, the processor 2810 is configured to:

Optionally, the radio frequency unit 2801 is further configured to:

Optionally, the processor 2810 is further configured to:

or,

Based on the above embodiment, optionally, in a case where the relay communication device is one of the N relay terminals and the N is greater than 1, the processor 2810 is configured to perform at least one of:

Optionally, the radio frequency unit 2801 is further configured to perform at least one of:

Optionally, the processor 2810 is further configured to:

or,

Optionally, the processor 2810 is further configured to send a configuration failure event of the sidelink communication to the source terminal.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the processor is used for acquiring first information according to the first information, the first information comprises configuration information for establishing a bearer of the sidelink communication, and the configuration information is sent to other terminals except the first terminal in the sidelink communication and corresponds to the other terminals. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 29 is a schematic hardware structure of a second terminal implementing an embodiment of the present application.

The terminal 2900 includes, but is not limited to: at least some of the components of the radio frequency unit 2901, the network module 2902, the audio output unit 2903, the input unit 2904, the sensor 2905, the display unit 2906, the user input unit 2907, the interface unit 2908, the memory 2909, the processor 2910, and the like.

Those skilled in the art will appreciate that the terminal 2900 may also include a power source (e.g., a battery) for powering the various components, which may be logically connected to the processor 2910 by a power management system to perform functions such as managing charge, discharge, and power consumption by the power management system. The terminal structure shown in fig. 29 does not constitute a limitation of the second terminal, and the second terminal may include more or less components than those shown, or may combine some components, or may be arranged in different components, which will not be described herein.

It should be appreciated that in embodiments of the present application, the input unit 2904 may include a graphics processing unit (Graphics Processing Unit, GPU) 29041 and a microphone 29042, with the graphics processor 29041 processing image data of still pictures or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The display unit 2906 may include a display panel 29061, and the display panel 29061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 2907 includes at least one of a touch panel 29071 and other input devices 29072. Touch panel 29071, also referred to as a touch screen. Touch panel 29071 may include two parts, a touch detection device and a touch controller. Other input devices 29072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 2901 may transmit the downlink data to the processor 2910 for processing; in addition, the radio frequency unit 2901 may send uplink data to the network-side device. In general, the radio frequency unit 2901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 2909 may be used to store software programs or instructions and various data. The memory 2909 may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 2909 may include volatile memory or nonvolatile memory, or the memory 2909 may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 2909 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 2910 may include one or more processing units; optionally, the processor 2910 integrates an application processor and a modem processor, wherein the application processor primarily processes operations involving an operating system, user interface, application program, and the like, and the modem processor primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 2910.

The radio frequency unit 2901 is configured to receive L sets of second configuration information and first configuration information from a third terminal, and determine 1 set of second configuration information corresponding to the relay communication device from the L sets of second configuration information; the processor 2910 is configured to send, to a fourth terminal, L-1 sets of second configuration information and first configuration information except 1 set of second configuration information corresponding to one hop between the third terminal and the second terminal;

Optionally, the third terminal and the first terminal are both source terminals, the relay communication device is a first-hop relay terminal, and the radio frequency unit 2901 is configured to:

the processor 2910 is configured to perform any one of:

The fourth terminal is a second-hop relay terminal or a destination terminal.

Optionally, the third terminal is a K-1 th hop relay terminal, and the radio frequency unit 2901 is configured to:

the processor 2910 is configured to perform any one of:

the fourth terminal is a K+1th hop relay terminal or a destination terminal.

the processor 2910 is configured to perform any one of:

the fourth terminal is a K-1 hop relay terminal or a source terminal.

Optionally, the processor 2910 is configured to:

or,

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored, and when the program or the instruction is executed by a processor, the processes of the foregoing relay communication method embodiment are implemented, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled with the processor, and the processor is used for running a program or an instruction, so as to implement each process of the embodiment of the relay communication method, and achieve the same technical effect, so that repetition is avoided, and no redundant description is provided here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the foregoing relay communication method embodiment, and the same technical effects are achieved, so that repetition is avoided, and details are not repeated herein.

The embodiment of the application also provides a relay communication system, which comprises: a first terminal operable to perform the steps associated with the first terminal in the relay communication method as described above, and a second terminal operable to perform the steps associated with the second terminal in the relay communication method as described above.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. A relay communication method, comprising:

2. The method of claim 1, wherein the first terminal obtains first information, comprising:

and under the condition that the first terminal is in an RRC connection state, the first terminal receives a first message from network side equipment, wherein the first message comprises the first information.

3. The method of claim 2, wherein before the first terminal receives the first message from the network-side device, the method further comprises:

and the first terminal sends a second message to the network side equipment, wherein the second message comprises the service information of the auxiliary link communication.

4. The method of claim 1, wherein the first terminal obtains first information, comprising:

when the first terminal is in an RRC inactive state or idle state, the first terminal receives a third message from network side equipment, wherein the third message comprises a mapping relation between configuration information and service information of a bearer for establishing the sidelink communication;

and the first terminal obtains the first information according to the service information of the auxiliary link communication and the mapping relation.

5. The method of claim 1, wherein the first terminal obtains first information, comprising:

when the first terminal is out of a network coverage area, the first terminal acquires pre-configuration information from terminal pre-configuration, wherein the pre-configuration information comprises a mapping relation between configuration information of a bearer used for establishing the sidelink communication and service information;

6. The method according to claim 4 or 5, wherein the first terminal obtaining the first information according to the service information of the sidelink communication and the mapping relation includes at least one of:

the first target parameter is an end-to-end related target parameter, the second target parameter is a target parameter related to each hop in the sidelink communication, and each set of second target parameter corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in the sidelink communication.

7. The method according to any of claims 3-5, wherein the traffic information of the sidelink communication comprises at least one of:

a source layer 2 identifier corresponding to a source terminal;

a destination layer 2 identifier corresponding to the source terminal;

a source layer 2 identifier corresponding to the destination terminal;

a destination layer 2 identifier corresponding to the destination terminal;

The source layer 2 identifiers corresponding to the N relay terminals;

the destination layer 2 identifiers corresponding to the N relay terminals;

the first target parameter is an end-to-end related target parameter;

terminal type information.

8. The method according to claim 6 or 7, wherein the target parameter comprises a QoS parameter.

9. The method according to claim 1, wherein in the case that the first terminal is the source terminal, the first terminal sends configuration information corresponding to other terminals except the first terminal in the first communication to the other terminals according to the first information, including at least one of:

the first terminal sends first configuration information to the target terminal through a sidelink radio resource control process;

the wireless resource control process of the first terminal communication auxiliary link transmits N+1 sets of second configuration information to the first hop relay terminal; the first-hop relay terminal is a relay terminal connected with the first terminal.

10. The method of claim 9, wherein after transmitting the first configuration information to the destination terminal through a sidelink radio resource control procedure, the method further comprises:

The first terminal receives a configuration success message or a configuration failure message of the first configuration information from the destination terminal.

11. The method of claim 9, wherein after the communication sidelink radio resource control procedure transmits n+1 sets of second configuration information to the first hop relay terminal, the method further comprises:

and the first terminal receives the configuration success message or the configuration failure message of the n+1 sets of second configuration information from the first hop relay terminal.

12. The method according to claim 9, wherein after the first terminal transmits configuration information corresponding to other terminals than the first terminal in the first communication to the other terminals according to the first information, the method further comprises:

in the case that the first terminal receives the configuration success message of the first configuration information from the target terminal and receives the configuration success message of the n+1 set of second configuration information from the first hop relay terminal, the first terminal determines that the sidelink communication configuration is successful;

or,

and under the condition that the first terminal receives the configuration failure message of the first configuration information from the target terminal and/or receives the configuration failure message of the n+1 set of second configuration information from the first hop relay terminal, the first terminal determines that the sidelink communication configuration fails.

13. The method according to claim 1, wherein in the case where the first terminal is one of the N relay terminals and the n=1, the first terminal transmitting configuration information corresponding to other terminals than the first terminal in the first communication to the other terminals according to the first information includes at least one of:

the first terminal sends the first configuration information and second configuration information corresponding to the source terminal through a sidelink radio resource control process;

and the first terminal sends the first configuration information and the second configuration information corresponding to the target terminal through a sidelink radio resource control process.

14. The method of claim 13, wherein after the first terminal transmits configuration information corresponding to other terminals than the first terminal in the first communication to the other terminals according to the first information, the method further comprises at least one of:

the first terminal receives a configuration success message or a configuration failure message of the first configuration information and the second configuration information from a source terminal;

The first terminal receives a configuration success message or a configuration failure message of the first configuration information and the second configuration information from a target terminal.

15. The method according to claim 13, wherein after the first terminal transmits configuration information corresponding to other terminals than the first terminal in the first communication to the other terminals according to the first information, the method further comprises:

in the case that the first terminal receives a configuration success message of the first configuration information and the second configuration information from a source terminal and receives a configuration success message of the first configuration information and the second configuration information from a target terminal, the first terminal determines that the sidelink communication configuration is successful;

or,

the first terminal determines that the sidelink communication configuration fails in a case that the first terminal receives a configuration failure message of the first configuration information and the second configuration information from a source terminal and/or receives a configuration failure message of the first configuration information and the second configuration information from a target terminal.

16. The method according to claim 1, wherein in the case where the first terminal is one of the N relay terminals and the N is greater than 1, the first terminal transmits configuration information corresponding to other terminals than the first terminal in the first communication to the other terminals according to the first information, including at least one of:

The first terminal sends M1+1 sets of second configuration information and the first configuration information corresponding to an upstream link of the first terminal to a first upstream terminal through a secondary link radio resource control process;

the first terminal sends M2+1 sets of second configuration information and the first configuration information corresponding to a downstream link of the first terminal to a first downstream terminal through a secondary link radio resource control process;

the upstream link of the first terminal comprises M1 relay terminals and source terminals between the source terminal and the first terminal, the first upstream terminal is a relay terminal or a source terminal connected with the first terminal in the upstream link of the first terminal, the downstream link of the first terminal comprises M2 relay terminals and destination terminals between the first terminal and the destination terminal, and the first downstream terminal is a relay terminal or a destination terminal connected with the first terminal in the downstream link of the first terminal, wherein M1 and M2 are integers larger than or equal to 0, and M1+M2=N-1.

17. The method of claim 16, wherein after the first terminal transmits configuration information corresponding to other terminals than the first terminal in the first communication to the other terminals according to the first information, the method further comprises at least one of:

The first terminal receives a configuration success message or a configuration failure message of M1+1 sets of second configuration information and the first configuration information corresponding to an upstream link of the first terminal from a first upstream terminal;

and the first terminal receives the configuration success message or the configuration failure message of the M2+1 sets of second configuration information and the first configuration information corresponding to the downstream link of the first terminal from the first downstream terminal.

18. The method of claim 16, wherein after the first terminal transmits configuration information corresponding to other terminals than the first terminal in the first communication to the other terminals according to the first information, the method further comprises:

in the case that the first terminal receives, from the first upstream terminal, a configuration success message of m1+1 sets of second configuration information and the first configuration information corresponding to an upstream link of the first terminal, and receives, from the first downstream terminal, a configuration success message of m2+1 sets of second configuration information and the first configuration information corresponding to an upstream link of the first terminal, the first terminal determines that the sidelink communication configuration is successful;

or,

And under the condition that the first terminal receives the M1+1 set of second configuration information corresponding to the upstream link of the first terminal and the configuration failure message of the first configuration information from the first upstream terminal, and/or receives the M2+1 set of second configuration information corresponding to the upstream link of the first terminal and the configuration failure message of the first configuration information from the first downstream terminal, the first terminal determines that the communication configuration of the sidelink fails.

19. The method according to claim 15 or 18, wherein in case the first terminal determines that the sidelink communication configuration fails, the method further comprises:

20. The method of claim 1, wherein the first configuration information comprises at least one of:

end-to-end sidelink radio bearer identification;

21. The method of claim 1, wherein the second configuration information for the 0 th hop comprises at least one of:

22. The method of claim 1, wherein the second configuration information of the nth hop comprises at least one of:

23. The method of claim 1, wherein the second configuration information of the J-th hop comprises at least one of:

J is a positive integer greater than 1 and less than N.

24. A relay communication device, comprising:

25. A relay communication method, comprising:

26. The method of claim 25, wherein the third terminal and the first terminal are both source terminals, the second terminal is a first hop relay terminal, and the second terminal receives L sets of second configuration information and first configuration information from the third terminal, comprising:

the fourth terminal is a second-hop relay terminal or a destination terminal.

27. The method of claim 25, wherein the third terminal is a K-1 th hop relay terminal, and wherein the second terminal receiving L sets of second configuration information and first configuration information from the third terminal comprises:

the Kth hop relay terminal sends the rest of N+1-K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the Kth hop = to a fourth terminal;

the fourth terminal is a K+1th hop relay terminal or a destination terminal.

28. The method of claim 25, wherein the third terminal is a k+1 hop relay terminal, and wherein the second terminal receiving L sets of second configuration information and first configuration information from the third terminal comprises:

the method comprises the steps that under the condition that the Kth hop relay terminal judges that second configuration information corresponding to the Kth hop can be applied, K sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the Kth hop relay terminal are sent to the fourth terminal;

The fourth terminal is a K-1 hop relay terminal or a source terminal.

29. The method of claim 25, wherein in the case where the second terminal receives L sets of second configuration information from the third terminal, the method further comprises:

or,

30. A relay communication device, comprising:

The second configuration module is used for sending the rest L-1 sets of second configuration information and the first configuration information except 1 set of second configuration information corresponding to the relay communication device to the fourth terminal;

the relay communication device is a kth hop relay terminal in N relay terminals of the sidelink communication, the first configuration information is end-to-end configuration information in configuration information of a bearer used for establishing the sidelink communication, the second configuration information is configuration information corresponding to each hop in the configuration information of the bearer, each set of second configuration information corresponds to one hop corresponding to the source terminal or one hop corresponding to one of the N relay terminals in the sidelink communication, the first configuration information and the second configuration information are determined by a first terminal, the first terminal is a source terminal of the sidelink communication or one of the N relay terminals in the sidelink communication, both N and K, L are positive integers, and both L and K are smaller than or equal to n+1; the third terminal and the first terminal are the same terminal or different terminals, and at least one of the following conditions is satisfied when the third terminal and the first terminal are different terminals:

31. A first terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the relay communication method of any of claims 1 to 23.

32. A second terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the relay communication method of any of claims 25 to 29.

33. A readable storage medium, characterized in that the readable storage medium stores thereon a program or instructions, which when executed by a processor, implements the relay communication method according to any one of claims 1 to 23, or the steps of the relay communication method according to any one of claims 25 to 29.