Relay communication method, device and terminal

Abstract

The application discloses a relay communication method, device and terminal, and belongs to the field of mobile communication. The relay communication method comprises the following steps: a first terminal acquires first information, wherein the first information comprises configuration information of a bearer used for establishing a sidelink communication; the first terminal sends configuration information corresponding to other terminals in the sidelink communication to the other terminals except the first terminal according to the first information; wherein 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 configuration information of the bearer; the second configuration information is configuration information corresponding to each hop in the configuration information of the bearer; and N is a positive integer.

Description

Technical Field

[0001] This application belongs to the field of mobile communication technology, specifically relating to a relay communication method, device and terminal. Background Technology

[0002] In a UE-to-UE (U2U) sidelink relay communication scenario, there are two ends: a source UE and a destination UE, and at least one relay UE in between. In this scenario, the source UE and the destination UE communicate through a sidelink with the relay UE, and the relay UE forwards the data transmission between the source UE and the destination UE. The relay UE acts as a data relay.

[0003] In a U2U sidelink relay scenario, it is necessary to define the configuration method for the bearer of the sidelink relay communication on each terminal. Summary of the Invention

[0004] This application provides a relay communication method, apparatus, and terminal, which can realize the configuration of secondary link relay communication in U2U sidelinkrelay scenarios on various terminals.

[0005] Firstly, a relay communication method is provided, applied to a first terminal, the method comprising:

[0006] The first terminal obtains first information, which includes configuration information for the bearer used to establish secondary link communication;

[0007] The first terminal sends configuration information corresponding to the other terminals in the secondary link communication, based on the first information;

[0008] Wherein, the first terminal is the source terminal in the secondary link communication or one of the N relay terminals in the secondary link communication; the first information includes first configuration information and N+1 sets of second configuration information, the first configuration information is the end-to-end configuration information in the configuration information of the bearer, the second configuration information is the configuration information corresponding to each hop in the configuration information of the bearer, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals, where N is a positive integer.

[0009] Secondly, a relay communication device is provided, comprising:

[0010] The first transmission module is used to acquire first information, the first information including configuration information of the bearer for establishing secondary link communication;

[0011] The first configuration module is used to send configuration information corresponding to the other terminals in the secondary link communication, other than the first terminal, according to the first information.

[0012] Wherein, the relay communication device is the source terminal in the secondary link communication or one of the N relay terminals in the secondary link communication; the first information includes first configuration information and N+1 sets of second configuration information, the first configuration information is the end-to-end configuration information in the configuration information carried, the second configuration information is the configuration information corresponding to each hop in the configuration information carried, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals, where N is a positive integer.

[0013] Thirdly, a relay communication method is provided for use in a second terminal, the method comprising:

[0014] 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;

[0015] The second terminal sends L-1 sets of second configuration information and first configuration information, excluding the one set of second configuration information corresponding to the one hop between the third terminal and the second terminal, to the fourth terminal;

[0016] Wherein, the second terminal is the Kth hop relay terminal among the N relay terminals of the secondary link communication; the first configuration information is the end-to-end configuration information in the bearer configuration information used to establish the secondary link communication; the second configuration information is the configuration information corresponding to each hop in the bearer configuration information, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals; the first configuration information and the second configuration information are determined by the first terminal, which is the source terminal of the secondary link communication or one of the N relay terminals in the secondary link communication; N, K, and L are all positive integers, and L and K are less than or equal to N+1; the third terminal is the same terminal as the first terminal or a different terminal; if the third terminal is a different terminal from the first terminal, at least one of the following conditions must be met:

[0017] The third terminal is one of the M1 relay terminals in the upstream link of the first terminal;

[0018] The third terminal is one of the M2 relay terminals in the downstream link of the first terminal;

[0019] The upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal; the downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal, where M1 and M2 are integers greater than or equal to 0, and M1+M2=N-1.

[0020] Fourthly, a relay communication device is provided, comprising:

[0021] The second transmission module is used to receive L sets of second configuration information and first configuration information from the third terminal, and to determine 1 set of second configuration information corresponding to the relay communication device from the L sets of second configuration information.

[0022] The second configuration module is used to send L-1 sets of second configuration information and first configuration information, excluding the set of second configuration information corresponding to one hop between the third terminal and the second terminal, to the fourth terminal.

[0023] Wherein, the relay communication device is the Kth hop relay terminal among the N relay terminals of the secondary link communication; the first configuration information is the end-to-end configuration information in the bearer configuration information for establishing the secondary link communication; the second configuration information is the configuration information corresponding to each hop in the bearer configuration information, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals; the first configuration information and the second configuration information are determined by the first terminal, which is either the source terminal of the secondary link communication or one of the N relay terminals in the secondary link communication; N, K, and L are all positive integers, and L and K are less than or equal to N+1; the third terminal is the same terminal as the first terminal or a different terminal; if the third terminal is a different terminal from the first terminal, at least one of the following conditions must be met:

[0024] The third terminal is one of the M1 relay terminals in the upstream link of the first terminal;

[0025] The third terminal is one of the M2 relay terminals in the downstream link of the first terminal;

[0026] The upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal; the downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal, where M1 and M2 are integers greater than or equal to 0, and M1+M2=N-1.

[0027] Fifthly, a first terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0028] In a sixth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used by the first terminal to send configuration information corresponding to other terminals in the secondary link communication to other terminals besides the first terminal according to the first information, and the communication interface is used by the first terminal to obtain the first information, the first information including configuration information for establishing a bearer for the secondary link communication.

[0029] In a seventh aspect, a second terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the third aspect.

[0030] Eighthly, a terminal is provided, including a processor and a communication interface, wherein the processor 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 a 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 L-1 sets of second configuration information and first configuration information other than the 1 set of second configuration information corresponding to a hop between the third terminal and the second terminal to a fourth terminal.

[0031] A ninth aspect provides a relay communication system, comprising: a first terminal and a second terminal, wherein the first terminal is configured to perform the steps of the relay communication method as described in the first aspect, and the second terminal is configured to perform the steps of the relay communication method as described in the third aspect.

[0032] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the third aspect.

[0033] Eleventhly, a chip is provided, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the third aspect.

[0034] In a twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the relay communication method as described in the first aspect or the third aspect.

[0035] In this embodiment of the application, by obtaining first information, which includes configuration information for establishing a bearer for secondary link communication, including first configuration information and N+1 sets of second configuration information, and then sending configuration information corresponding to the other terminals in the secondary link communication (excluding the first terminal) according to the first information, the configuration of the bearer in U2U relay communication is realized. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of a wireless communication system applicable to the embodiments of this application;

[0037] Figure 2 This is a schematic diagram of the structure of a relay communication system provided in an embodiment of this application;

[0038] Figure 3 This is a flowchart illustrating a relay communication method provided in an embodiment of this application;

[0039] Figure 4 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0040] Figure 5 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0041] Figure 6 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0042] Figure 7 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0043] Figure 8 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0044] Figure 9 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0045] Figure 10 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0046] Figure 11 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0047] Figure 12 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0048] Figure 13 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0049] Figure 14 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0050] Figure 15 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0051] Figure 16 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0052] Figure 17 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0053] Figure 18 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0054] Figure 19 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0055] Figure 20 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0056] Figure 21 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0057] Figure 22 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0058] Figure 23 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0059] Figure 24 This is a schematic diagram of the structure of a relay communication device provided in an embodiment of this application;

[0060] Figure 25 This is a flowchart illustrating another relay communication method provided in an embodiment of this application;

[0061] Figure 26 This is a schematic diagram of the structure of a relay communication device provided in an embodiment of this application;

[0062] Figure 27This is a schematic diagram of a communication device structure provided in an embodiment of this application;

[0063] Figure 28 A schematic diagram of the structure of a terminal according to an embodiment of this application;

[0064] Figure 29 A schematic diagram of the structure of another terminal to implement the embodiments of this application. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0066] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0067] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and NR terminology is used in most of the following description; however, these technologies can also be applied to applications beyond NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0068] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. Terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home devices with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM, or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of terminal 11 is not limited in this embodiment. Network-side equipment 12 may include access network equipment or core network equipment. Access network equipment 12 may also be referred to as radio access network equipment, radio access network (RAN), radio access network function, or radio access network unit. Access network equipment 12 may include base stations, WLAN access points, or WiFi nodes, etc. Base stations may be referred to as Node B, evolved Node B (eNB), access point, base transceiver station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B node, home evolved B node, Transmitting Receiving Point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this application embodiment, only a base station in an NR system is used as an example for description, and the specific type of base station is not limited.Core network equipment may include, but is not limited to, at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), and Binding Support. Core network functions (BSF), application functions (AF), etc. It should be noted that this application embodiment only uses core network equipment in the NR system as an example for description, and does not limit the specific type of core network equipment.

[0069] The relay communication method, apparatus, and terminal provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0070] like Figure 2 and Figure 3 As shown, this application provides a relay communication method, in which a first terminal is the executing entity; in other words, the method can be executed by software or hardware installed on the first terminal. The method includes:

[0071] S310. The first terminal obtains first information, the first information including configuration information of the bearer used to establish secondary link communication.

[0072] like Figure 2 As shown, the secondary link communication refers to U2U secondary link relay communication between the source terminal 21 and the destination terminal 22. Data is relayed between the source terminal 21 and the destination terminal 22 through N relay terminals 23, where N is a positive integer. Data transmission occurs between the source terminal 21 and the relay terminals 23, between each relay terminal 23, and between the relay terminals 23 and the destination terminal 22, all through the secondary link interface (PC5). The source terminal can be either the service initiator of the secondary link communication or the service stream sender during the service transmission process. Similarly, the destination terminal can be either the service receiver of the secondary link communication or the service stream receiver during the service transmission process.

[0073] The first terminal can be either the source terminal 21 in the secondary link communication or one of the N relay terminals 23 in the secondary link communication.

[0074] For secondary link communication with N=1, this can also be called a single-hop relaying scenario. This can be understood as the initial hop corresponding to the source terminal not being counted in the total hop count or being numbered hop 0 (hop-0), and the hop corresponding to the first-hop terminal being numbered hop 1 (hop-1). For secondary link communication with N>1, this can also be called a multiple-hop relaying scenario or an N-hop relaying scenario. Similarly, the initial hop corresponding to the source terminal not being counted in the total hop count or being numbered hop 0 (hop-0), the hop corresponding to the first-hop terminal being numbered hop 1 (hop-1), and so on... until the hop corresponding to the Nth-hop terminal is numbered Nth-hop (hop-N).

[0075] The first information includes first configuration information and N+1 sets of second configuration information. The first configuration information is the end-to-end configuration information in the configuration information of the bearer, and the second configuration information is the configuration information corresponding to each hop in the configuration information of the bearer. Each set of second configuration information corresponds to a hop corresponding to the source terminal or a hop corresponding to one of the N relay terminals in the secondary link communication, where N is a positive integer. For simplicity, as mentioned above, each hop in the secondary link communication can be numbered, then each set of second configuration information corresponds to the Kth hop in the secondary link communication, where K is any integer less than or equal to N.

[0076] The secondary link communication requires establishing an end-to-end sidelink radio bearer (E2ESLRB) between the source terminal 21 and the destination terminal 22, and hop-by-hop secondary link bearers corresponding to each hop from the source terminal 21 to the destination terminal 22. These can also be called radio link control bearers (RLCBearers) or radio link control channels (RLCChannels). For simplicity, RLCBearers will be used as an example in the following embodiments. Accordingly, the bearer configuration information of the first communication may include first configuration information corresponding to the E2ESLRB and N+1 sets of second configuration information corresponding to the RLCChannel of each hop.

[0077] In one implementation, the first configuration information includes at least one of the following:

[0078] End-to-end secondary link radio bearer identifier (SLRBID);

[0079] The configuration of the PC5 Service Data Adaptation Protocol (PC5-SDAP) entity for the source terminal and the destination terminal;

[0080] The configuration of the PC5 Packet Data Convergence Protocol (PC5 PDCP) entity for the source terminal and the destination terminal.

[0081] In one implementation, the second configuration information for each hop in the N+1 sets of second configuration information includes at least one of the following:

[0082] Configuration of PC5 Sidelink Relay Adaptation Protocol (PC5SRAP) entities with each hop pair;

[0083] Configuration of the secondary link radio link control (PC5 Radio Link Control, PC5 RLC) entity for each hop pair;

[0084] Configuration of the secondary link media access control entity (PC5 Medium Access Control, PC5MAC) with each hop pair.

[0085] The second configuration information for hop 0 includes at least one of the following:

[0086] The configuration of the secondary link relay adaptation layer protocol entity that is equivalent to the source terminal and the first hop relay terminal;

[0087] The configuration of the secondary link radio link control entity corresponding to the source terminal and the first hop relay terminal;

[0088] The configuration of the secondary link media access control entity corresponding to the source terminal and the first hop relay terminal;

[0089] Wherein, the 0th hop is a hop between the source terminal and the first hop relay terminal, and the first hop relay terminal is a relay terminal connected to the source terminal.

[0090] The second configuration information for the Nth hop includes at least one of the following:

[0091] Configuration of the secondary link relay adaptation layer protocol entity for the Nth hop relay terminal and the destination terminal;

[0092] The configuration of the secondary link radio link control entity that is equivalent to the destination terminal for the Nth hop relay terminal;

[0093] The configuration of the secondary link media access control entity that is equivalent to the destination terminal for the Nth hop relay terminal;

[0094] Wherein, the Nth hop is a hop between the Nth hop relay terminal and the destination terminal, and the Nth hop relay terminal is a relay terminal connected to the destination terminal.

[0095] The second configuration information for the J-th hop includes at least one of the following:

[0096] Configuration of the sub-link relay adaptation layer protocol entity for the J-th hop relay terminal and the J+1-th hop relay terminal;

[0097] Configuration of the secondary link radio link control entity corresponding to the J-th hop relay terminal and the J+1-th hop relay terminal;

[0098] Configuration of the secondary link media access control entity corresponding to the J-th hop relay terminal and the J+1-th hop relay terminal;

[0099] Wherein, the Jth hop is a hop between the adjacent Jth hop relay terminal and the J+1th hop relay terminal.

[0100] J is a positive integer greater than 1 and less than N.

[0101] S320. The first terminal sends configuration information corresponding to the other terminals in the secondary link communication according to the first information.

[0102] After obtaining the first configuration information and N+1 sets of second configuration information, the first terminal can send the first configuration information to the source terminal and / or the destination terminal by hop-by-hop transmission, send one set of second configuration information corresponding to each relay terminal from the N+1 sets of second configuration information to each relay terminal, and send one set of second configuration information corresponding to the source terminal and / or the destination terminal to the source terminal and / or the destination terminal.

[0103] In one implementation, if the first terminal is the source terminal, after obtaining the first configuration information and N+1 sets of second configuration information, the first terminal can send the second configuration information corresponding to each relay terminal to each relay terminal through hop-by-hop transmission, and send the second configuration information and the first configuration information corresponding to the destination terminal to the destination terminal.

[0104] In another implementation, if the first terminal is a relay terminal, after obtaining the first configuration information and N+1 sets of second configuration information, the first terminal sends the second configuration information corresponding to each relay terminal to the upstream link and the downstream link in a hop-by-hop transmission manner, sends the second configuration information and the first configuration information corresponding to the source terminal to the source terminal, and sends the second configuration information and the first configuration information corresponding to the destination terminal to the destination terminal.

[0105] After receiving the corresponding second configuration information, the relay terminal applies the second configuration information and replies with the application result to the first terminal. This reply can be implemented directly or indirectly. If the relay terminal is an adjacent terminal connected to the first terminal, it replies directly to the first terminal; if the relay terminal is not an adjacent terminal connected to the first terminal, it needs to reply to the first terminal through hop-by-hop transmission.

[0106] After receiving the corresponding second and first configuration information, the source terminal applies the second and first configuration information and replies with the application result to the first terminal. This reply can be implemented directly or indirectly. If the source terminal is an adjacent terminal connected to the first terminal, it replies directly to the first terminal; if the source terminal is not an adjacent terminal connected to the first terminal, it needs to reply to the first terminal through hop-by-hop transmission.

[0107] After receiving the corresponding second and first configuration information, the destination terminal applies the second and first configuration information and replies with the application result to the first terminal. This reply can be implemented directly or indirectly. If the destination terminal is an adjacent terminal connected to the first terminal, it replies directly to the first terminal; if the destination terminal is not an adjacent terminal connected to the first terminal, it needs to reply to the first terminal through hop-by-hop transmission.

[0108] The first terminal determines whether the secondary link communication is configured successfully based on the received application results. If the received application results indicate that both the first configuration information and N+1 sets of second configuration information are configured successfully, then the secondary link communication is determined to be configured successfully; otherwise, the secondary link communication is determined to be configured unsuccessfully.

[0109] As can be seen from the technical solutions of the above embodiments, the embodiments of this application obtain first information, which includes configuration information for establishing a bearer for secondary link communication, including first configuration information and N+1 sets of second configuration information, and then send configuration information corresponding to the other terminals in the secondary link communication (excluding the first terminal) according to the first information, thereby realizing the configuration of the bearer in U2U relay communication.

[0110] Based on the above embodiments, the method for the first terminal to obtain the first information can be configured based on the network status of the first terminal. In one implementation, such as... Figure 4 As shown, step S310 includes:

[0111] S312. When the first terminal is in RRC connected state, the first terminal receives a first message from the network side device, the first message including the first information.

[0112] The first message can be dedicated signaling, such as a Radio Resource Control Reconfiguration (RRCReconfiguration) message. The first message may include first configuration information and N+1 sets of second configuration information.

[0113] Prior to step S312, the method further includes:

[0114] S311. The first terminal sends a second message to the network-side device, the second message including the service information of the secondary link communication.

[0115] The second message can be a SidelinkUEInformationNR message.

[0116] In one implementation, the service information of the secondary link communication includes at least one of the following:

[0117] The SourceLayer-2 ID corresponding to the source terminal;

[0118] The Destination Layer-2 ID corresponding to the source terminal;

[0119] The source layer 2 identifier corresponding to the destination terminal is the same as the destination layer 2 identifier corresponding to the source terminal.

[0120] The destination layer 2 identifier corresponding to the destination terminal is the same as the source layer 2 identifier corresponding to the source terminal.

[0121] The source L2 identifiers corresponding to N relay terminals, each relay terminal can be used as the source L2 identifier of the next hop sender;

[0122] The destination L2 identifiers corresponding to N relay terminals, each relay terminal can be used as the destination L2 identifier of the previous hop receiver;

[0123] The first target parameter is an end-to-end related target parameter;

[0124] N+1 sets of second target parameters, each set of second target parameters is the target parameters related to each hop, which can be the QoS parameters of each hop;

[0125] Terminal type information is used by the first terminal to inform the network-side device of its terminal type information in the secondary link relay communication.

[0126] The target parameters can be set according to actual needs. In one implementation, they may include QoS parameters. For simplicity, QoS parameters will be used as an example in the following embodiments.

[0127] The first target parameter can specifically be an end-to-end QoS parameter, wherein the end-to-end QoS parameter can be composed of the QoS parameters of each hop, and the end-to-end QoS parameter is determined by the QoS requirements of communication between the source terminal and the destination terminal.

[0128] Each set of second target parameters can specifically be QoS parameters for each hop. The QoS parameters for each hop can be determined by the QoS requirements of communication between the terminals at both ends of each hop. For example, when N=1, the service information can include: QoS parameters for hop 0 and QoS parameters for hop 1. The QoS parameters for hop 0 are determined by the QoS requirements of communication between the source terminal and the first-hop relay terminal; the QoS parameters for hop 1 are determined by the QoS requirements of communication between the first-hop relay terminal and the destination terminal. When N is greater than 1, the service information can include QoS parameters for hop 0, QoS parameters for hop 1, ..., QoS parameters for hop N. The QoS parameters for hop 0 are determined by the QoS requirements of communication between the source terminal and the first-hop relay terminal; the QoS parameters for hop 1 are determined by the QoS requirements of communication between the first-hop relay terminal and the second-hop relay terminal; ..., the QoS parameters for hop N are determined by the QoS requirements of communication between the Nth-hop relay terminal and the destination terminal.

[0129] The terminal type information may include: terminal type information of source terminal, destination terminal and relay terminal, such as source terminal (Source UE) or remote terminal (Remote UE). The relay terminal may be further distinguished as a relay terminal for UE-to-UE relay communication (U2U Relay UE) or a relay terminal for UE-to-Network communication (U2N Relay UE).

[0130] In another implementation, such as Figure 5 As shown, step S310 includes:

[0131] S313. When the first terminal is in an RRC inactive or idle state, the first terminal receives a third message from the network-side device. The third message includes a mapping relationship between configuration information and service information for establishing the bearer of the secondary link communication.

[0132] The third message can be a System Information Block 12 (SIB12) message.

[0133] S314. The first terminal obtains the first information based on the service information of the secondary link communication and the mapping relationship.

[0134] In another implementation, such as Figure 6 As shown, step S310 includes:

[0135] S315. When the first terminal is outside the network coverage area (Out-Of-Coverage, OOC), the first terminal obtains pre-configuration information from the terminal pre-configuration. The pre-configuration information includes a mapping relationship between configuration information and service information for establishing the bearer of the secondary link communication. The pre-configuration information may be secondary link pre-configuration information (SL-PreconfigurationNR).

[0136] S316. The first terminal obtains the first information based on the service information of the secondary link communication and the mapping relationship.

[0137] In one implementation, S314 or S316 may include at least one of the following:

[0138] The first configuration information is obtained based on the first target parameter and the mapping relationship, that is, the end-to-end configuration information is determined based on the end-to-end QoS parameters;

[0139] Based on the N+1 sets of second target parameters and the mapping relationship, the N+1 sets of second configuration information are obtained, that is, the configuration information corresponding to each hop is determined according to the QoS parameters of each hop. For example, the configuration information corresponding to the first hop is determined according to the QoS parameters of the first hop, and the configuration information corresponding to the second hop is determined according to the QoS parameters of the second hop.

[0140] Wherein, the first target parameter is an end-to-end related target parameter, and the second target parameter is a hop-related target parameter in the secondary link communication. Each set of second target parameters corresponds to a hop corresponding to the source terminal or a hop corresponding to one of N relay terminals in the secondary link communication, where N is a positive integer. For simplicity, as mentioned above, each hop in the secondary link communication can be numbered, then each set of second target parameters corresponds to the Kth hop in the secondary link communication, where K is any integer less than or equal to N.

[0141] As can be seen from the technical solutions of the above embodiments, the embodiments of this application can obtain the first information by using different methods according to the different network states of the first terminal, thereby flexibly realizing the bearer configuration of U2U secondary link relay communication.

[0142] Based on the above embodiments, optionally, as follows: Figure 7 As shown, when the first terminal is the source terminal, step S320 may include:

[0143] S321. The first terminal sends first configuration information to the destination terminal through the secondary link radio resource control procedure. The first configuration information can be sent through the secondary link radio resource control reconfiguration (RRCReconfigurationSidelink) message.

[0144] After step S321, the method further includes:

[0145] S331, the first terminal receives a configuration success message or configuration failure message of the first configuration information from the destination terminal.

[0146] The destination terminal determines whether it can accept or apply the first configuration information. If it determines that it can accept or apply the first configuration information, the destination terminal sends a configuration success message for the first configuration information to the first terminal, which can be sent through a secondary link radio resource control reconfiguration complete (RRCReconfigurationCompleteSidelink) message. If it determines that it rejects or cannot apply the first configuration information, the destination terminal sends a configuration failure message for the first configuration information to the first terminal, which can be sent through a radio resource control reconfiguration failure (RRCReconfigurationFailureSidelink) message.

[0147] S322, the first terminal communication secondary link radio resource control process sends N+1 sets of second configuration information to the first hop relay terminal. The N+1 sets of second configuration information can be sent through the RRCReconfigurationSidelink message; wherein, the first hop relay terminal is a relay terminal connected to the first terminal.

[0148] For the first-hop relay terminal, after receiving the N+1 sets of second configuration information, the first-hop relay terminal determines one set of second configuration information corresponding to the 0th hop from the N+1 sets of second configuration information. Then, it sends the remaining N sets of second configuration information, excluding the one set of second configuration information corresponding to the 0th hop relay terminal, to the downstream terminals of the first-hop relay terminal. Wherein, when N=1, the downstream terminal of the first-hop relay terminal is the destination terminal; when N is greater than 1, the downstream terminal of the first-hop relay terminal is the second-hop relay terminal, which continues to transmit to the downstream terminals.

[0149] In one implementation, the first-hop relay terminal may send the N sets of second configuration information to downstream terminals after determining that it can accept or apply the second configuration information corresponding to the first-hop relay terminal. The second configuration information corresponding to the first-hop relay terminal may include the second configuration information corresponding to the 0th hop and / or the second configuration information corresponding to the 1st hop.

[0150] For the Kth hop relay terminal, the Kth hop relay terminal can receive N+2-K sets of second configuration information from the third terminal, and determine one set of second configuration information corresponding to the (K-1)th hop from it. Then, it sends the other N+1-K sets of second configuration information, excluding the one set of second configuration information corresponding to the (K-1)th hop, to the fourth terminal; wherein, K is a positive integer less than or equal to N.

[0151] The third terminal can be the source terminal or the adjacent (K-1)th hop relay terminal;

[0152] The fourth terminal can be the destination terminal or the adjacent K+1th hop relay terminal.

[0153] In one implementation, the Kth hop relay terminal may send the N+1-K sets of second configuration information to the fourth terminal after determining that it can accept or apply the second configuration information corresponding to the Kth hop relay terminal. The second configuration information corresponding to the Kth hop relay terminal may include: the second configuration information corresponding to the (K-1)th hop, and / or, the second configuration information corresponding to the Kth hop.

[0154] After step S322, the method further includes:

[0155] S332, the first terminal receives a configuration success message or configuration failure message of the N+1 sets of second configuration information from the first hop relay terminal.

[0156] For the first-hop relay terminal, in one implementation, the first-hop relay terminal may send a configuration success message of the N+1 sets of second configuration information to the first terminal if the following conditions are met:

[0157] The first hop relay terminal can accept or apply the second configuration information corresponding to the first hop relay terminal, and the first hop relay terminal receives a configuration success message of the N sets of second configuration information sent by the downstream terminal.

[0158] In another implementation, the first hop relay terminal may send a configuration failure message of the N+1 sets of second configuration information to the first terminal if at least one of the following conditions is met:

[0159] The first hop relay terminal's refusal or inability to apply the second configuration information corresponding to the first hop relay terminal may include refusing or being unable to apply the second configuration information corresponding to the 0th hop and / or refusing or being unable to apply the second configuration information corresponding to the 1st hop;

[0160] The first hop relay terminal receives a configuration failure message for the N sets of second configuration information sent by the downstream terminal;

[0161] No messages were received from downstream terminals within the preset time.

[0162] For the Kth hop relay terminal, in one implementation, the Kth hop relay terminal may send an N+2-K sets of second configuration information configuration failure message to the third terminal if the following conditions are met:

[0163] The Kth hop relay terminal can accept or apply the second configuration information corresponding to the Kth hop relay terminal, and the Kth hop relay terminal receives a configuration success message of the N+1-K sets of second configuration information sent by the fourth terminal.

[0164] In another implementation, the Kth hop relay terminal may send an N+2-K sets of second configuration information configuration failure message to the third terminal if at least one of the following conditions is met:

[0165] The Kth hop relay terminal's refusal or inability to apply the second configuration information corresponding to the Kth hop relay terminal may include refusing or being unable to apply the second configuration information corresponding to the (K-1)th hop and / or refusing or being unable to apply the second configuration information corresponding to the Kth hop;

[0166] The Kth hop relay terminal receives a configuration failure message for the N+1-K sets of second configuration information sent by the fourth terminal;

[0167] No messages were received from the fourth terminal within the preset time.

[0168] Following steps S331 and / or S332, the method further includes:

[0169] S341. When the first terminal receives a configuration success message for the first configuration information from the target terminal and a configuration success message for the N+1 sets of second configuration information from the first hop relay terminal, the first terminal determines that the secondary link communication configuration is successful.

[0170] or,

[0171] S342. If the first terminal receives a configuration failure message for the first configuration information from the target terminal, and / or receives a configuration failure message for the N+1 sets of second configuration information from the first hop relay terminal, the first terminal determines that the secondary link communication configuration has failed.

[0172] In one implementation, such as Figure 8 As shown, when the first terminal is the source terminal, the first terminal is in RRC connection state, and N=1, the secondary link communication method includes the following steps:

[0173] A1. The source terminal sends a second message to the network-side device. The second message includes the service information of the secondary link communication. The second message can be a SidelinkUEInformationNR message, as in step S311.

[0174] A2. The network-side device sends a first message to the source terminal according to the second message. The first message includes first configuration information, configuration information corresponding to the 0th hop, and configuration information corresponding to the 1st hop. The first information can be carried by the RRCReconfiguration message, as in step S312. The 0th hop is a hop between the source terminal and the first hop relay terminal, and the 1st hop is a hop between the first hop relay terminal and the destination terminal.

[0175] A3a. The source terminal sends two sets of second configuration information to the first-hop relay terminal via the RRCReconfigurationSidelink message, namely the configuration information corresponding to the 0th hop and the configuration information corresponding to the 1st hop, as in step S322.

[0176] A4a. If the first-hop relay terminal determines that it can accept or apply the configuration information corresponding to the 0th hop, it sends the configuration information corresponding to the 1st hop to the destination terminal via the RRCReconfigurationSidelink message.

[0177] A5a. If the destination terminal determines that it can accept or apply the configuration information corresponding to the first hop, it sends RRCReconfigurationCompleteSidelink to the first hop relay terminal to indicate that the configuration information corresponding to the first hop has been successfully configured.

[0178] A6a. When the first hop relay terminal determines that the two sets of second configuration information have been successfully configured, the first hop relay terminal sends an RRCReconfigurationCompleteSidelink message to the source terminal to indicate that the two sets of second configuration information have been successfully configured, as in step S332.

[0179] A3b. The source terminal sends the first configuration information to the destination terminal via the RRCReconfigurationSidelink message, as in step S321.

[0180] A4b. If the destination terminal determines that it can accept or apply the first configuration information, it sends RRCReconfigurationCompleteSidelink to the source terminal to indicate that the first configuration information has been configured successfully, as in step S331.

[0181] Steps A3a-A6a and A3b-A4b are not in any particular order.

[0182] According to steps A6a and A4b, the source terminal determines that the bearer configuration of the secondary link communication is successful. After successful configuration, the source terminal and the destination terminal can perform NR secondary link unicast communication through the secondary link communication.

[0183] In another implementation, such as Figure 9 As shown, when the first terminal is the source terminal, the first terminal is in RRC connection state, and N=1, the secondary link communication method includes the following steps:

[0184] B1-B4a and Figure 8 The methods for A1-A4a shown are the same, and will not be repeated here.

[0185] B5a. If the destination terminal determines that it refuses or cannot apply the configuration information corresponding to the first hop, it sends an RRCReconfigurationFailureSidelink to the first hop relay terminal to indicate that the configuration information corresponding to the first hop has failed to be configured.

[0186] B6a. The first-hop relay terminal sends an RRCReconfigurationFailureSidelink message to the source terminal if at least one of the following conditions is met, indicating that the configuration of the two sets of second configuration information has failed:

[0187] Condition 1. According to step B3a, the first-hop relay terminal refuses or is unable to apply the configuration information corresponding to the 0th hop;

[0188] Condition 2. According to step B5a, the first-hop relay terminal receives the RRCReconfigurationFailureSidelink message sent by the destination terminal;

[0189] Condition 3. The first-hop relay terminal does not receive any messages from the destination terminal within a preset time, including RRCReconfigurationCompleteSidelink and RRCReconfigurationFailureSidelink messages.

[0190] B3b and Figure 8 The method shown for A3b is the same, so it will not be repeated here.

[0191] If the destination terminal determines that it refuses or cannot apply the first configuration information, it sends an RRCReconfigurationFailureSidelink to the source terminal to indicate that the configuration of the first configuration information has failed.

[0192] The source terminal determines that the secondary link communication configuration has failed based on at least one of steps B6a and B4b.

[0193] In another implementation, such as Figure 10 As shown, when the first terminal is the source terminal, the first terminal is in an RRC inactive state or an idle state, and N=1, the secondary link communication method includes the following steps.

[0194] C1. The source terminal receives a third message from the network-side device. The third message may be an SIB12 message. The third message includes a mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication, as shown in step S313.

[0195] C2. The source terminal obtains the first information based on the service information of the secondary link communication and the mapping relationship, as shown in step S314.

[0196] Steps C3a-C4b and Figure 8 The A3a-A4b shown are the same, so they will not be repeated here.

[0197] In another implementation, such as Figure 11 As shown, when the first terminal is the source terminal, the first terminal is in an OOC state, and N=1, the secondary link communication method includes the following steps.

[0198] D1. The source terminal obtains pre-configuration information from the terminal pre-configuration. The pre-configuration information may be an SL-PreconfigurationNR message. The pre-configuration information includes a mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication, as shown in step S315.

[0199] D2. The source terminal obtains the first information based on the service information of the secondary link communication and the mapping relationship, as shown in step S316.

[0200] Steps D3a-D4b and Figure 8 The A3a-A4b shown are the same, so they will not be repeated here.

[0201] In another implementation, such as Figure 12 As shown, when the first terminal is the source terminal, the first terminal is in an RRC inactive state or an idle state, and N=1, the secondary link communication method includes the following steps.

[0202] Steps E1-E2 and Figure 10 C1-C2 are the same, so I will not repeat them here.

[0203] Steps E3a-E4b and Figure 9 Steps B3a-B4b are the same and will not be repeated here.

[0204] In another implementation, such as Figure 13 As shown, when the first terminal is the source terminal, the first terminal is in an OOC state, and N=1, the secondary link communication method includes the following steps.

[0205] Steps F1-F2 and Figure 11 The same applies to D1-D2, so it will not be repeated here.

[0206] Steps F3a-F4b and Figure 9 Steps B3a-B4b are the same and will not be repeated here.

[0207] In another implementation, such as Figure 14 As shown, when the first terminal is the source terminal, the first terminal is in RRC connection state, and N is greater than 1, the secondary link communication method includes the following steps.

[0208] and Figure 8 The technical solutions shown are compared.

[0209] G1. The second message sent by the source terminal to the network-side device includes, compared with A1, QoS parameters corresponding to each hop and source layer 2 identifiers and destination layer 2 identifiers corresponding to the relay terminals of each hop.

[0210] Compared to A2, the first message sent by the network-side device to the source terminal in G2 includes multiple sets of second configuration information.

[0211] G3a-Gia. The source terminal sends the corresponding second configuration information to the relay terminals in each hop through a hop-by-hop transmission method.

[0212] G3a. The source terminal sends N+1 sets of second configuration information to the first hop relay terminal;

[0213] G4a. The first-hop relay terminal sends N sets of second configuration information to the second-hop relay terminal;

[0214] ... (passing the ball hop by hop)

[0215] Gia. The Nth hop relay terminal sends the second configuration information corresponding to the destination terminal to the destination terminal;

[0216] Gic. The destination terminal sends a configuration success message to the Nth hop relay terminal, which contains the second configuration information corresponding to the destination terminal.

[0217] ... (passing the ball hop by hop)

[0218] G4c. If the second-hop relay terminal determines that the N sets of second configuration information have been successfully configured, it sends a configuration success message for the N sets of second configuration information to the first-hop relay terminal.

[0219] G3c. When the first-hop relay terminal determines that the N sets of second configuration information have been successfully configured, it sends an RRCReconfigurationCompleteSidelink message to the source terminal to indicate that the N+1 sets of second configuration information have been successfully configured.

[0220] G3b-G4b and Figure 8 The steps A3b-A4b are the same, so they will not be repeated here.

[0221] According to steps G6a and G4b, the source terminal determines that the bearer configuration of the secondary link communication is successful. After successful configuration, the source terminal and the destination terminal can perform NR secondary link unicast communication through the secondary link communication.

[0222] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication when the first terminal is the source terminal by sending the first configuration information to the destination terminal and transmitting the second configuration information hop by hop to the relay terminal.

[0223] Based on the above embodiments, optionally, as follows: Figure 15 As shown, when the first terminal is one of the N relay terminals and N=1, the first terminal will send corresponding configuration information to the source terminal and the destination terminal respectively. Step S320 includes:

[0224] S323, the first terminal sends the first configuration information and the second configuration information corresponding to the source terminal to the source terminal through the secondary link radio resource control procedure.

[0225] After step S323, the method further includes:

[0226] S333, the first terminal receives a configuration success message or configuration failure message from the source terminal for the first configuration information and the second configuration information.

[0227] The source terminal determines whether it can accept or apply the first configuration information and the second configuration information corresponding to the 0th hop. If it determines that it can accept or apply the first configuration information and the second configuration information corresponding to the 0th hop, the source terminal sends a configuration success message for the first configuration information and the second configuration information corresponding to the 0th hop to the first terminal, which can be sent through an RRCReconfigurationCompleteSidelink message. If it determines that it refuses or cannot apply the first configuration information and / or refuses or cannot apply the second configuration information corresponding to the 0th hop, the source terminal sends a configuration failure message for the first configuration information and the second configuration information corresponding to the 0th hop to the first terminal, which can be sent through an RRCReconfigurationFailureSidelink message.

[0228] S324. The first terminal sends the first configuration information and the second configuration information corresponding to the first hop to the destination terminal through the secondary link radio resource control procedure.

[0229] After step S324, the method further includes:

[0230] S334. The first terminal receives a configuration success message or configuration failure message from the target terminal for the first configuration information and the second configuration information.

[0231] The destination terminal determines whether it can accept or apply the first configuration information and the second configuration information corresponding to the first hop. If it determines that it can accept or apply the first configuration information and the second configuration information corresponding to the first hop, the destination terminal sends a configuration success message for the first configuration information and the second configuration information corresponding to the first hop to the first terminal, which can be sent through an RRCReconfigurationCompleteSidelink message. If it determines that it refuses or cannot apply the first configuration information and / or refuses or cannot apply the second configuration information corresponding to the first hop, the destination terminal sends a configuration failure message for the first configuration information and the second configuration information corresponding to the first hop to the first terminal, which can be sent through an RRCReconfigurationFailureSidelink message.

[0232] Following steps S333 and / or S334, the method further includes:

[0233] S343. When the first terminal receives a configuration success message for the first configuration information and the second configuration information from the source terminal, and receives a configuration success message for the first configuration information and the second configuration information from the target terminal, the first terminal determines that the secondary link communication configuration is successful.

[0234] or,

[0235] S344. If the first terminal receives a configuration failure message for the first configuration information and the second configuration information from the source terminal, and / or receives a configuration failure message for the first configuration information and the second configuration information from the target terminal, the first terminal determines that the secondary link communication configuration has failed.

[0236] If the first terminal determines that the secondary link communication configuration has failed, the method further includes:

[0237] The first terminal sends a configuration failure event for the secondary link communication to the source terminal.

[0238] In one implementation, such as Figure 16 As shown, when the first terminal is one of the N relay communications, the first terminal is in RRC connection state, and N=1, that is, only the first hop relay terminal is included, the secondary link communication method includes the following steps:

[0239] H1. The first-hop relay terminal sends a second message to the network-side device. The second message includes the service information of the secondary link communication. The second message can be a SidelinkUEInformationNR message, as in step S311.

[0240] H2. The network-side device sends a first message to the first-hop relay terminal according to the second message. The first message includes first configuration information, configuration information corresponding to the 0th hop, and configuration information corresponding to the 1st hop. The first information can be carried by the RRCReconfiguration message, as in step S312. The 0th hop is a hop between the source terminal and the first-hop relay terminal, and the 1st hop is a hop between the first-hop relay terminal and the destination terminal.

[0241] H3a. The first-hop relay terminal sends the first configuration information and the configuration information corresponding to the 0th hop to the source terminal via the RRCReconfigurationSidelink message, as in step S323.

[0242] H4a. If the source terminal determines that it can accept or apply the first configuration information and the configuration information corresponding to the 0th hop, it sends RRCReconfigurationCompleteSidelink to the first hop relay terminal to indicate that the configuration of the first configuration information and the configuration information corresponding to the 0th hop is successful, as in step S333.

[0243] H3b. The first-hop relay terminal sends the first configuration information and the configuration information corresponding to the first hop to the destination terminal via the RRCReconfigurationSidelink message, as in step S324.

[0244] H4b. If the destination terminal determines that it can accept or apply the first configuration information and the configuration information corresponding to the first hop, it sends RRCReconfigurationCompleteSidelink to the first hop relay terminal to indicate that the first configuration information has been successfully configured, as in step S334.

[0245] Steps H3a and H3b are not in any particular order, nor are steps H4a and H4b.

[0246] According to steps H4a and H4b, the first-hop relay terminal determines that the bearer configuration of the secondary link communication is successful. After successful configuration, the source terminal and the destination terminal can perform NR secondary link unicast communication through the secondary link communication.

[0247] In another implementation, such as Figure 17As shown, when the first terminal is one of the N relay communications, the first terminal is in RRC connection state, and N=1, the secondary link communication method includes the following steps:

[0248] I1-I3b and Figure 16 The methods for H1-H3b shown are the same, and will not be repeated here.

[0249] H4a. If the source terminal determines that it refuses or cannot apply the first configuration information and / or the configuration information corresponding to the 0th hop, it sends an RRCReconfigurationFailureSidelink to the first hop relay terminal to indicate that the configuration of the first configuration information and / or the configuration information corresponding to the 0th hop has failed.

[0250] H4b. If the destination terminal determines that it refuses or cannot apply the first configuration information and / or the configuration information corresponding to the first hop, it sends an RRCReconfigurationFailureSidelink to the first hop relay terminal to indicate that the configuration of the first configuration information and / or the configuration information corresponding to the first hop has failed.

[0251] The first-hop relay terminal determines that the secondary link communication configuration has failed when at least one of the following conditions is met:

[0252] Condition 1. Based on step H4a, receive RRCReconfigurationFailureSidelink from the source terminal;

[0253] Condition 2. Based on step H4b, receive RRCReconfigurationFailureSidelink from the destination terminal;

[0254] Condition 3. No messages, including RRCReconfigurationCompleteSidelink and RRCReconfigurationFailureSidelink messages, are received from the source terminal within the preset time.

[0255] Condition 4. No messages, including RRCReconfigurationCompleteSidelink and RRCReconfigurationFailureSidelink messages, are received from the destination terminal within the preset time.

[0256] In another implementation, such as Figure 18As shown, when 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 secondary link communication method includes the following steps.

[0257] J1. The first relay terminal receives a third message from the network-side device. The third message may be an SIB12 message. The third message includes a mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication, as shown in step S313.

[0258] J2. The first relay terminal obtains first information based on the service information of the secondary link communication and the mapping relationship, as shown in step S314.

[0259] Steps J3a-J4a and Figure 16 The H3a-H4a shown are the same, so they will not be repeated here.

[0260] In another implementation, such as Figure 19 As shown, when the first terminal is one of the N relay communications, the first terminal is in an OOC state, and N=1, the sub-link communication method includes the following steps.

[0261] K1. The first relay terminal obtains pre-configuration information from the terminal pre-configuration. The pre-configuration information may be an SL-PreconfigurationNR message. The pre-configuration information includes a mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication, as shown in step S315.

[0262] K2. The first relay terminal obtains the first information based on the service information of the secondary link communication and the mapping relationship, as shown in step S316.

[0263] Steps K3a-K4a and Figure 16 The H3a-H4a shown are the same, so they will not be repeated here.

[0264] In another implementation, such as Figure 20 As shown, when 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 secondary link communication method includes the following steps.

[0265] L1-L3b and Figure 18 The methods for J1-J3b are the same, so they will not be repeated here.

[0266] L4b and L4a and Figure 17 I4b and I4a are the same, so they will not be repeated here.

[0267] In another implementation, such as Figure 21 As shown, when the first terminal is one of the N relay communications, the first terminal is in an OOC state, and N=1, the sub-link communication method includes the following steps.

[0268] M1-M3b and Figure 19 The method for K1-K3b is the same, and will not be repeated here.

[0269] M4b and M4a with Figure 17 I4b and I4a are the same, so they will not be repeated here.

[0270] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication when the first terminal is the source terminal by sending the first configuration information and the corresponding second configuration information to the source terminal and the destination terminal respectively.

[0271] Based on the above embodiments, optionally, as follows: Figure 22 As shown, when the first terminal is one of the N relay terminals and N is greater than 1, the first terminal will send corresponding configuration information to the upstream link and the downstream link respectively. Step S320 includes at least one of the following:

[0272] S325, the first terminal sends the M1+1 set of second configuration information and the first configuration information corresponding to the upstream link of the first terminal to the first upstream terminal through the secondary link radio resource control process.

[0273] The upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal. The downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal. M1 and M2 are integers greater than or equal to 0, and M1 + M2 = N - 1. The first upstream terminal is either a relay terminal or a source terminal connected to the first terminal in the upstream link of the first terminal.

[0274] After step S325, the method further includes:

[0275] S335. The first terminal receives from the first upstream terminal M1+1 sets of second configuration information corresponding to the upstream link of the first terminal and a configuration success message or configuration failure message of the first configuration information.

[0276] For the Kth hop relay terminal, in one embodiment, when the Kth hop relay terminal is located on the 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 the K+1 hop relay terminal;

[0277] The Kth hop relay terminal sends to the fourth terminal K sets of second configuration information, excluding the 1 set of second configuration information corresponding to the Kth hop, and the first configuration information;

[0278] If the Kth hop relay terminal determines that it can apply the second configuration information corresponding to the Kth hop, it sends the K sets of second configuration information other than the 1 set of second configuration information corresponding to the Kth hop relay terminal and the first configuration information to the fourth terminal.

[0279] The fourth terminal is either the (K-1)th hop relay terminal or the source terminal.

[0280] In one implementation, the Kth hop relay terminal may send a configuration success message of the K+1 sets of second configuration information and first configuration information to the K+1 hop relay terminal under the following conditions:

[0281] The Kth hop relay terminal can accept or apply a set of second configuration information corresponding to the Kth hop, and the Kth hop relay terminal receives a configuration success message from the fourth terminal for the K sets of second configuration information and the first configuration information.

[0282] In another implementation, the Kth hop relay terminal may send a configuration failure message containing the K+1 sets of second configuration information and the first configuration information to the K+1 hop relay terminal if at least one of the following conditions is met:

[0283] The Kth hop relay terminal refuses or is unable to apply the set of second configuration information corresponding to the Kth hop;

[0284] The Kth hop relay terminal receives a configuration failure message from the fourth terminal containing the K sets of second configuration information and the first configuration information.

[0285] No message was received from the fourth terminal within the preset time.

[0286] S326. The first terminal sends 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 the secondary link radio resource control process.

[0287] The first downstream terminal is a relay terminal or destination terminal connected to the first terminal in the downstream link of the first terminal.

[0288] After step S326, the method further includes:

[0289] S336. The first terminal receives from the first downstream terminal the M2+1 sets of second configuration information corresponding to the downstream link of the first terminal and the configuration success message or configuration failure message of the first configuration information.

[0290] For the Kth hop relay terminal, in one embodiment, when the Kth hop relay terminal is located on the 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 the (K-1)th hop relay terminal;

[0291] The Kth hop relay terminal sends to the fourth terminal N+1-K sets of second configuration information, excluding the 1 set of second configuration information corresponding to the Kth hop, and the first configuration information;

[0292] If the Kth hop relay terminal determines that it can apply the second configuration information corresponding to the Kth hop, it sends the remaining N+1-K sets of second configuration information and first configuration information, except for the 1 set of second configuration information corresponding to the Kth hop relay terminal, to the fourth terminal.

[0293] The fourth terminal is either the (K+1)th hop relay terminal or the destination terminal.

[0294] In one implementation, the Kth hop relay terminal may send a configuration success message containing the N+2-K sets of second configuration information and the first configuration information to the (K-1)th hop relay terminal under the following conditions:

[0295] The Kth hop relay terminal can accept or apply one set of second configuration information corresponding to the Kth hop, and the Kth hop relay terminal receives a configuration success message from the fourth terminal for the N+1-K sets of second configuration information and the first configuration information.

[0296] In another implementation, the Kth hop relay terminal may send a configuration failure message containing the N+2-K sets of second configuration information and the first configuration information to the (K-1)th hop relay terminal if at least one of the following conditions is met:

[0297] The Kth hop relay terminal refuses or is unable to apply the set of second configuration information corresponding to the Kth hop;

[0298] The Kth hop relay terminal receives a configuration failure message from the fourth terminal for the N+1-K sets of second configuration information and first configuration information;

[0299] No message was received from the fourth terminal within the preset time.

[0300] Following steps S335 and / or S336, the method further includes:

[0301] S345. When the first terminal receives M1+1 sets of second configuration information and a configuration success message of the first configuration information corresponding to the upstream link of the first terminal from the first upstream terminal, and receives M2+1 sets of second configuration information and a configuration success message of the first configuration information corresponding to the upstream link of the first terminal from the first downstream terminal, the first terminal determines that the secondary link communication configuration is successful.

[0302] or,

[0303] S346. When the first terminal receives M1+1 sets of second configuration information and a configuration failure message of the first configuration information corresponding to the upstream link of the first terminal from the first upstream terminal, and / or receives M2+1 sets of second configuration information and a configuration failure message of the first configuration information corresponding to the upstream link of the first terminal from the first downstream terminal, the first terminal determines that the sub-link communication configuration has failed.

[0304] If the first terminal determines that the secondary link communication configuration has failed, the method further includes:

[0305] The first terminal sends a configuration failure event for the secondary link communication to the source terminal.

[0306] In one implementation, such as Figure 23 As shown, when the first terminal is one of N relay terminals, taking the first terminal as the first hop relay terminal as an example, and the first terminal is in RRC connection state, and N is greater than 1, the secondary link communication method includes the following steps.

[0307] and Figure 16 The technical solutions shown are compared.

[0308] N1. The first-hop relay terminal sends a second message to the network-side device. Compared with H1, the second message includes more QoS parameters corresponding to more hops and source layer 2 identifiers and destination layer 2 identifiers corresponding to more relay terminals.

[0309] Compared to H2, the first message sent by the network-side device to the first-hop relay terminal in N2 includes multiple sets of second configuration information.

[0310] N3a. The first-hop relay terminal sends the first configuration information and the second configuration information corresponding to the 0th hop to the source terminal.

[0311] N3b-Nib. The first hop relay terminal sends the corresponding second configuration information and first configuration information to each relay terminal and the destination terminal in the downstream link in a hop-by-hop transmission manner.

[0312] N3b. The first-hop relay terminal sends N sets of second configuration information and first configuration information to the second-hop relay terminal;

[0313] ... (passing the ball hop by hop)

[0314] Nib. The Nth hop relay terminal sends the second configuration information and the first configuration information corresponding to the Nth hop to the destination terminal;

[0315] Nic. The destination terminal sends a configuration success message to the Nth hop relay terminal, which contains the second configuration information and the first configuration information corresponding to the Nth hop.

[0316] ...

[0317] N3c. The second-hop relay terminal sends an RRCReconfigurationCompleteSidelink message to the first-hop relay terminal to indicate that the N sets of second configuration information and first configuration information have been successfully configured.

[0318] N4a. The source terminal sends a configuration success message for the second configuration information and the first configuration information corresponding to the 0th hop to the first hop relay terminal.

[0319] According to steps H4a and H4b, the first-hop relay terminal determines that the bearer configuration of the secondary link communication is successful. After successful configuration, the source terminal and the destination terminal can perform NR secondary link unicast communication through the secondary link communication.

[0320] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication by sending the corresponding second configuration information and first configuration information to the upstream link and the downstream link respectively.

[0321] The relay communication method provided in this application can be executed by a relay communication device. This application uses an example of a relay communication device executing the relay communication method to illustrate the relay communication device provided in this application.

[0322] like Figure 24 As shown, the relay communication device includes: a first transmission module 2401 and a first configuration module 2402.

[0323] The first transmission module 2401 is used to acquire first information, the first information including configuration information for establishing a bearer for secondary link communication; the first configuration module 2402 is used to send configuration information corresponding to other terminals in the secondary link communication, excluding the first terminal, according to the first information; wherein, the relay communication device is the source terminal in the secondary link communication or one of the N relay terminals in the secondary link communication; the first information includes first configuration information and N+1 sets of second configuration information, the first configuration information is the end-to-end configuration information in the configuration information of the bearer, the second configuration information is the configuration information corresponding to each hop in the configuration information of the bearer, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals, where N is a positive integer.

[0324] Optionally, the first configuration information includes at least one of the following:

[0325] End-to-end secondary link radio bearer identifier;

[0326] The source terminal and the destination terminal are equivalent in the secondary link service data adaptation protocol entity configuration.

[0327] The configuration of the secondary link packet data aggregation protocol entity for the source terminal and the destination terminal.

[0328] Optionally, the second configuration information for hop 0 includes at least one of the following:

[0329] The configuration of the secondary link relay adaptation layer protocol entity that is equivalent to the source terminal and the first hop relay terminal;

[0330] The configuration of the secondary link radio link control entity corresponding to the source terminal and the first hop relay terminal;

[0331] The configuration of the secondary link media access control entity corresponding to the source terminal and the first hop relay terminal;

[0332] Wherein, the 0th hop is a hop between the source terminal and the first hop relay terminal, and the first hop relay terminal is a relay terminal connected to the source terminal.

[0333] Optionally, the second configuration information for the Nth hop includes at least one of the following:

[0334] Configuration of the secondary link relay adaptation layer protocol entity for the Nth hop relay terminal and the destination terminal;

[0335] The configuration of the secondary link radio link control entity that is equivalent to the destination terminal for the Nth hop relay terminal;

[0336] The configuration of the secondary link media access control entity that is equivalent to the destination terminal for the Nth hop relay terminal;

[0337] Wherein, the Nth hop is a hop between the Nth hop relay terminal and the destination terminal, and the Nth hop relay terminal is a relay terminal connected to the destination terminal.

[0338] Optionally, the second configuration information of the Jth hop includes at least one of the following:

[0339] Configuration of the sub-link relay adaptation layer protocol entity for the J-th hop relay terminal and the J+1-th hop relay terminal;

[0340] Configuration of the secondary link radio link control entity corresponding to the J-th hop relay terminal and the J+1-th hop relay terminal;

[0341] Configuration of the secondary link media access control entity corresponding to the J-th hop relay terminal and the J+1-th hop relay terminal;

[0342] Wherein, the Jth hop is a hop between the adjacent Jth hop relay terminal and the J+1th hop relay terminal.

[0343] J is a positive integer greater than 1 and less than N.

[0344] As can be seen from the technical solutions of the above embodiments, the embodiments of this application obtain first information, which includes configuration information for establishing a bearer for secondary link communication, including first configuration information and N+1 sets of second configuration information, and then send configuration information corresponding to the other terminals in the secondary link communication (excluding the first terminal) according to the first information, thereby realizing the configuration of the bearer in U2U relay communication.

[0345] Based on the above embodiments, optionally, the first transmission module 2401 is configured to receive a first message from the network-side device when in an RRC connection state, the first message including the first information.

[0346] Optionally, the first transmission module 2401 is further configured to send a second message to the network-side device, the second message including service information of the secondary link communication.

[0347] Optionally, the first transmission module 2401 is used for:

[0348] When in the RRC inactive or idle state, a third message is received from the network-side device. The third message includes a mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication.

[0349] The first information is obtained based on the service information of the secondary link communication and the mapping relationship.

[0350] Optionally, the first transmission module 2401 is used for:

[0351] When outside the network coverage area, pre-configuration information is obtained from the terminal pre-configuration, the pre-configuration information including the mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication;

[0352] The first information is obtained based on the service information of the secondary link communication and the mapping relationship.

[0353] Optionally, the first transmission module 2401 is configured to perform at least one of the following:

[0354] The first configuration information is obtained based on the first target parameter and the mapping relationship;

[0355] Based on the N+1 sets of second target parameters and the mapping relationship, the N+1 sets of second configuration information are obtained;

[0356] Wherein, the first target parameter is an end-to-end related target parameter, and the second target parameter is a hop-related target parameter in the secondary link communication. Each set of second target parameters corresponds to a hop corresponding to the source terminal or one of the N relay terminals in the secondary link communication.

[0357] Optionally, the service information of the secondary link communication includes at least one of the following:

[0358] The source layer 2 identifier corresponding to the source terminal;

[0359] The destination layer 2 identifier corresponding to the source terminal;

[0360] The source layer 2 identifier corresponding to the destination terminal;

[0361] The destination layer 2 identifier corresponding to the destination terminal;

[0362] Source Layer 2 identifiers corresponding to N relay terminals;

[0363] The destination layer 2 identifiers corresponding to N relay terminals;

[0364] The first target parameter is an end-to-end related target parameter;

[0365] N+1 sets of second target parameters, each set of second target parameters being the target parameters related to each jump;

[0366] Terminal type information.

[0367] Optionally, the target parameters include QoS parameters.

[0368] As can be seen from the technical solutions of the above embodiments, the embodiments of this application can obtain the first information by using different methods according to the different network states of the first terminal, thereby flexibly realizing the bearer configuration of U2U secondary link relay communication.

[0369] Based on the above embodiments, optionally, when the relay communication device is the source terminal, the first configuration module 2402 is configured to perform at least one of the following:

[0370] The first configuration information is sent to the destination terminal through the secondary link radio resource control process;

[0371] The communication sub-link radio resource control process sends N+1 sets of second configuration information to the first hop relay terminal; wherein, the first hop relay terminal is a relay terminal connected to the first terminal.

[0372] Optionally, the first transmission module 2401 is further configured to receive a configuration success message or configuration failure message of the first configuration information from the destination terminal.

[0373] Optionally, the first transmission module 2401 is further configured to receive a configuration success message or configuration failure message of the N+1 sets of second configuration information from the first hop relay terminal.

[0374] Optionally, the first configuration module 2402 is further configured to:

[0375] If a configuration success message for the first configuration information is received from the target terminal and a configuration success message for the N+1 sets of second configuration information is received from the first hop relay terminal, it is determined that the secondary link communication configuration is successful.

[0376] or,

[0377] If a configuration failure message for the first configuration information is received from the target terminal, and / or a configuration failure message for the N+1 sets of second configuration information is received from the first hop relay terminal, the secondary link communication configuration is determined to have failed.

[0378] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication when the first terminal is the source terminal by sending the first configuration information to the destination terminal and transmitting the second configuration information hop by hop to the relay terminal.

[0379] Based on the above embodiments, optionally, when the relay communication device is one of the N relay terminals and N=1, the first configuration module 2402 is used to:

[0380] The first configuration information and the second configuration information corresponding to the source terminal are sent to the source terminal through the secondary link radio resource control process.

[0381] The first configuration information and the second configuration information corresponding to the target terminal are sent to the target terminal through the secondary link radio resource control procedure.

[0382] Optionally, the first transmission module 2401 is further configured to:

[0383] Receive a configuration success message or configuration failure message from the source terminal for the first configuration information and the second configuration information;

[0384] Receive a configuration success message or configuration failure message from the target terminal for the first configuration information and the second configuration information.

[0385] Optionally, the first configuration module 2402 is further configured to:

[0386] If a configuration success message for the first configuration information and the second configuration information is received from the source terminal, and a configuration success message for the first configuration information and the second configuration information is received from the target terminal, then the secondary link communication configuration is determined to be successful.

[0387] or,

[0388] If a configuration failure message for the first configuration information and the second configuration information is received from the source terminal, and / or a configuration failure message for the first configuration information and the second configuration information is received from the target terminal, the secondary link communication configuration is determined to have failed.

[0389] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication when the first terminal is the source terminal by sending the first configuration information and the corresponding second configuration information to the source terminal and the destination terminal respectively.

[0390] Based on the above embodiments, optionally, when the relay communication device is one of the N relay terminals and N is greater than 1, the first configuration module 2402 is configured to perform at least one of the following:

[0391] The second configuration information (M1+1 sets) and the first configuration information corresponding to the upstream link of the first terminal are sent to the first upstream terminal through the secondary link radio resource control process.

[0392] The second configuration information (M2+1 sets) and the first configuration information corresponding to the downstream link of the first terminal are sent to the first downstream terminal through the secondary link radio resource control process.

[0393] The upstream link of the relay communication device includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal. The first upstream terminal is a relay terminal or source terminal connected to the relay communication device in the upstream link. The downstream link includes M2 relay terminals between the relay communication device and the destination terminal, as well as the destination terminal. The first downstream terminal is a relay terminal or destination terminal connected to the relay communication device in the downstream link. M1 and M2 are integers greater than or equal to 0, and M1 + M2 = N - 1.

[0394] Optionally, the first transmission module 2401 is further configured to perform at least one of the following:

[0395] Receive from the first upstream terminal M1+1 sets of second configuration information corresponding to the upstream link and a configuration success message or configuration failure message of the first configuration information;

[0396] Receive the M2+1 sets of second configuration information corresponding to the downstream link and the configuration success message or configuration failure message of the first configuration information from the first downstream terminal.

[0397] Optionally, the first configuration module 2402 is further configured to:

[0398] If the configuration success message of the M1+1 sets of second configuration information and the first configuration information corresponding to the upstream link is received from the first upstream terminal, and the configuration success message of the M2+1 sets of second configuration information and the first configuration information corresponding to the upstream link is received from the first downstream terminal, the sub-link communication configuration is determined to be successful.

[0399] or,

[0400] If the configuration failure message of the second configuration information M1+1 sets corresponding to the upstream link and the first configuration information is received from the first upstream terminal, and / or if the configuration failure message of the second configuration information M2+1 sets corresponding to the upstream link and the first configuration information is received from the first downstream terminal, it is determined that the sub-link communication configuration has failed.

[0401] Optionally, the first configuration module 2402 is further configured to send a configuration failure event of the secondary link communication to the source terminal.

[0402] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication by sending the corresponding second configuration information and first configuration information to the upstream link and the downstream link respectively.

[0403] The relay communication device in this application embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the type.

[0404] The relay communication device provided in this application embodiment can achieve... Figures 2 to 23 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0405] like Figure 25 As shown in the illustration, this application also provides a relay communication method, wherein the method is executed by a second terminal; in other words, the method can be executed by software or hardware installed on the second terminal. The method includes:

[0406] 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;

[0407] S2520, The second terminal sends L-1 sets of second configuration information and first configuration information, excluding the set of second configuration information corresponding to the one hop between the third terminal and the second terminal, to the fourth terminal;

[0408] Wherein, the second terminal is the Kth hop relay terminal among the N relay terminals of the secondary link communication; the first configuration information is the end-to-end configuration information in the bearer configuration information used to establish the secondary link communication; the second configuration information is the configuration information corresponding to each hop in the bearer configuration information, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals; the first configuration information and the second configuration information are determined by the first terminal, which is the source terminal of the secondary link communication or one of the N relay terminals in the secondary link communication; N, K, and L are all positive integers, and L and K are less than or equal to N+1; the third terminal is the same terminal as the first terminal or a different terminal; if the third terminal is a different terminal from the first terminal, at least one of the following conditions must be met:

[0409] The third terminal is one of the M1 relay terminals in the upstream link of the first terminal;

[0410] The third terminal is one of the M2 relay terminals in the downstream link of the first terminal;

[0411] The upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal; the downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal, where M1 and M2 are integers greater than or equal to 0, and M1+M2=N-1.

[0412] Optionally, both the third terminal and the first terminal are source terminals, and the second terminal is a first-hop relay terminal. Step S2510 includes:

[0413] The first hop relay terminal receives N+1 sets of second configuration information and the first configuration information from the source terminal;

[0414] The first-hop relay terminal sends L-1 sets of second configuration information and first configuration information, excluding the one set of second configuration information corresponding to the hop between the third terminal and the second terminal, to the fourth terminal, including any one of the following:

[0415] The second terminal sends the fourth terminal N sets of second configuration information, excluding the one set of second configuration information corresponding to the (K-1)th hop, and the first configuration information;

[0416] If the second terminal determines that it can apply the second configuration information corresponding to the first hop relay terminal, it sends N sets of second configuration information to the fourth terminal, excluding the set of second configuration information corresponding to the (K-1)th hop.

[0417] The fourth terminal is either the second-hop relay terminal or the destination terminal.

[0418] Optionally, the third terminal is the (K-1)th hop relay terminal, and step S2510 includes:

[0419] The Kth hop relay terminal receives N+2-K sets of second configuration information and the first configuration information from the (K-1)th hop relay terminal;

[0420] The second terminal sends L-1 sets of second configuration information and first configuration information, excluding the one set of second configuration information corresponding to the one hop between the third terminal and the second terminal, to the fourth terminal, including any one of the following:

[0421] The Kth hop relay terminal sends to the fourth terminal N+1-K sets of second configuration information, excluding the set of second configuration information corresponding to the K-1th hop, and the first configuration information;

[0422] If the Kth hop relay terminal determines that it can apply the second configuration information corresponding to the Kth hop relay terminal, it sends the remaining N+1-K sets of second configuration information and the first configuration information, except for the one set of second configuration information corresponding to the K-1th hop, to the fourth terminal.

[0423] The fourth terminal is either the (K+1)th hop relay terminal or the destination terminal.

[0424] Optionally, the third terminal is a K+1 hop relay terminal, and step S2510 includes:

[0425] The Kth hop relay terminal receives K+1 sets of second configuration information and first configuration information from the K+1th hop relay terminal;

[0426] The second terminal sends L-1 sets of second configuration information, excluding the one set of second configuration information corresponding to the one hop between the third terminal and the second terminal, and the first configuration information to the fourth terminal, including any one of the following:

[0427] The Kth hop relay terminal sends to the fourth terminal K sets of second configuration information, excluding the 1 set of second configuration information corresponding to the Kth hop, and the first configuration information;

[0428] If the Kth hop relay terminal determines that it can apply the second configuration information corresponding to the Kth hop relay terminal, it sends the K sets of second configuration information other than the 1 set of second configuration information corresponding to the Kth hop and the first configuration information to the fourth terminal.

[0429] The fourth terminal is either the (K-1)th hop relay terminal or the source terminal.

[0430] Optionally, step S2520 includes:

[0431] If the second terminal determines that the second configuration information corresponding to the second terminal has been successfully applied and receives a configuration success message for the L-1 sets of second configuration information and first configuration information from the fourth terminal, the second terminal sends a configuration success message for the L sets of second configuration information and first configuration information to the third terminal.

[0432] or,

[0433] If it is determined that the second configuration information corresponding to the second terminal has not been successfully applied, and / or if a configuration failure message for the L-1 sets of second configuration information and first configuration information is received from the fourth terminal, the second terminal sends a configuration failure message for the L sets of second configuration information and first configuration information to the third terminal.

[0434] It should be noted that determining the successful application of the second configuration information corresponding to the second terminal may specifically include satisfying at least one of the following:

[0435] Determine whether the second configuration information corresponding to the second terminal can be accepted or applied;

[0436] The second configuration information corresponding to the second terminal has been applied.

[0437] As can be seen from the technical solutions of the above embodiments, the embodiments of this application receive L sets of second configuration information and first configuration information from the third terminal, and send L-1 sets of second configuration information and first configuration information, excluding the 1 set of second configuration information corresponding to the one hop between the third terminal and the second terminal, to the fourth terminal, thereby clarifying the role of the relay terminal in the bearer configuration process of the secondary link relay communication and realizing the bearer configuration of U2U secondary link relay communication.

[0438] The relay communication method provided in this application can be executed by a relay communication device. This application uses an example of a relay communication device executing the relay communication method to illustrate the relay communication device provided in this application.

[0439] like Figure 26 As shown, the relay communication device includes: a second transmission module 2601 and a second configuration module 2602.

[0440] The second transmission module 2601 is used to receive L sets of second configuration information and first configuration information from the 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 used to send L-1 sets of second configuration information and first configuration information, excluding the 1 set of second configuration information corresponding to the hop between the third terminal and the second terminal, to the fourth terminal.

[0441] Wherein, the relay communication device is the Kth hop relay terminal among the N relay terminals of the secondary link communication; the first configuration information is the end-to-end configuration information in the bearer configuration information for establishing the secondary link communication; the second configuration information is the configuration information corresponding to each hop in the bearer configuration information, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals; the first configuration information and the second configuration information are determined by the first terminal, which is either the source terminal of the secondary link communication or one of the N relay terminals in the secondary link communication; N, K, and L are all positive integers, and L and K are less than or equal to N+1; the third terminal is the same terminal as the first terminal or a different terminal; if the third terminal is a different terminal from the first terminal, at least one of the following conditions must be met:

[0442] The third terminal is one of the M1 relay terminals in the upstream link of the first terminal;

[0443] The third terminal is one of the M2 relay terminals in the downstream link of the first terminal;

[0444] The upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal; the downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal, where M1 and M2 are integers greater than or equal to 0, and M1+M2=N-1.

[0445] Optionally, both the third terminal and the first terminal are source terminals, the relay communication device is a first-hop relay terminal, and the second transmission module 2601 is used for:

[0446] Receive N+1 sets of second configuration information and the first configuration information from the source terminal;

[0447] The second configuration module 2602 is used to perform any of the following:

[0448] Send to the fourth terminal N sets of second configuration information, excluding the set of second configuration information corresponding to the (K-1)th hop, and the first configuration information;

[0449] If it is determined that the second configuration information corresponding to the first hop relay terminal can be applied, the fourth terminal sends N sets of second configuration information, except for the set of second configuration information corresponding to the (K-1)th hop.

[0450] The fourth terminal is either the second-hop relay terminal or the destination terminal.

[0451] Optionally, the third terminal is the (K-1)th hop relay terminal, and the second transmission module 2601 is used for:

[0452] Receive N+2-K sets of second configuration information and the first configuration information from the (K-1)th hop relay terminal;

[0453] The second configuration module 2602 is used to perform any of the following:

[0454] Send to the fourth terminal N+1-K sets of second configuration information, excluding the set of second configuration information corresponding to the K-1th hop, and the first configuration information;

[0455] If it is determined that the second configuration information corresponding to the relay communication device can be applied, the fourth terminal is sent with N+1-K sets of second configuration information and first configuration information, except for the set of second configuration information corresponding to the K-1th hop.

[0456] The fourth terminal is either the (K+1)th hop relay terminal or the destination terminal.

[0457] Optionally, the third terminal is a K+1 hop relay terminal, and the second transmission module 2601 is used for:

[0458] Receive K+1 sets of second configuration information and first configuration information from the K+1th hop relay terminal;

[0459] The second configuration module 2602 is used to perform any of the following:

[0460] Send the K sets of second configuration information, excluding the set of second configuration information corresponding to the Kth hop, and the first configuration information to the fourth terminal;

[0461] If it is determined that the second configuration information corresponding to the relay communication device can be applied, the fourth terminal is sent with K sets of second configuration information other than the one set of second configuration information corresponding to the Kth hop and the first configuration information.

[0462] The fourth terminal is either the (K-1)th hop relay terminal or the source terminal.

[0463] Optionally, the second configuration module 2602 is used for:

[0464] If it is determined that the second configuration information corresponding to the relay communication device has been successfully applied and a configuration success message for the L-1 sets of second configuration information and first configuration information has been received from the fourth terminal, a configuration success message for the L sets of second configuration information and first configuration information is sent to the third terminal.

[0465] or,

[0466] If it is determined that the second configuration information corresponding to the relay communication device has not been successfully applied, and / or, if a configuration failure message for the L-1 sets of second configuration information and first configuration information is received from the fourth terminal, a configuration failure message for the L sets of second configuration information and first configuration information is sent to the third terminal.

[0467] As can be seen from the technical solutions of the above embodiments, the embodiments of this application receive L sets of second configuration information and first configuration information from the third terminal, and send L-1 sets of second configuration information and first configuration information, excluding the 1 set of second configuration information corresponding to the one hop between the third terminal and the second terminal, to the fourth terminal, thereby clarifying the role of the relay terminal in the bearer configuration process of the secondary link relay communication and realizing the bearer configuration of U2U secondary link relay communication.

[0468] The relay communication device in this application embodiment can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or other devices besides a terminal. For example, the terminal can include, but is not limited to, the type of terminal 11 listed above; other devices can be servers, network attached storage (NAS), etc., and this application embodiment does not specifically limit the type.

[0469] The relay communication device provided in this application embodiment can achieve... Figure 25 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0470] Optional, such as Figure 27 As shown, this application embodiment also provides a communication device 2700, including a processor 2701 and a memory 2702. The memory 2702 stores a program or instructions that can run on the processor 2701. For example, when the communication device 2700 is a terminal, the program or instructions executed by the processor 2701 implement the various steps of the above-described relay communication method embodiment and achieve the same technical effect. When the communication device 2700 is a network-side device, the program or instructions executed by the processor 2701 implement the various steps of the above-described relay communication method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0471] This application embodiment also provides a terminal, including a processor and a communication interface. The processor is used to send configuration information corresponding to other terminals in the secondary link communication (excluding the first terminal) according to the first information. The communication interface is used to obtain the first information, which includes configuration information for establishing a bearer for the secondary link communication. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 28 A schematic diagram of the hardware structure of a first terminal to implement an embodiment of this application.

[0472] The terminal 2800 includes, but is not limited to, at least some of the following components: radio frequency unit 2801, network module 2802, audio output unit 2803, input unit 2804, sensor 2805, display unit 2806, user input unit 2807, interface unit 2808, memory 2809, and processor 2810.

[0473] Those skilled in the art will understand that the terminal 2800 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 2810 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 28 The terminal structure shown does not constitute a limitation on the first terminal. The first terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0474] It should be understood that, in this embodiment, the input unit 2804 may include a graphics processing unit (GPU) 28041 and a microphone 28042. The GPU 28041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 2806 may include a display panel 28061, which 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 called a touch screen. The touch panel 28071 may include a touch detection device and a touch controller. Other input devices 28072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0475] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 2801 can transmit it to the processor 2810 for processing; in addition, the radio frequency unit 2801 can send uplink data to the network-side device. Typically, the radio frequency unit 2801 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0476] The memory 2809 can be used to store software programs or instructions, as well as various data. The memory 2809 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 2809 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 2809 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0477] Processor 2810 may include one or more processing units; optionally, processor 2810 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 2810.

[0478] The radio frequency unit 2801 is used to acquire first information, which includes configuration information for the bearer used to establish secondary link communication.

[0479] The processor 2810 is configured to send configuration information corresponding to other terminals in the secondary link communication, excluding the first terminal, according to the first information; wherein, the relay communication device is the source terminal in the secondary link communication or one of the N relay terminals in the secondary link communication; the first information includes first configuration information and N+1 sets of second configuration information, the first configuration information is the end-to-end configuration information in the carried configuration information, the second configuration information is the configuration information corresponding to each hop in the carried configuration information, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals, where N is a positive integer.

[0480] Optionally, the first configuration information includes at least one of the following:

[0481] End-to-end secondary link radio bearer identifier;

[0482] The source terminal and destination terminal are equivalent secondary link service data adaptation protocol entity configurations.

[0483] The configuration of the secondary link packet data aggregation protocol entity for the source terminal and the destination terminal.

[0484] Optionally, the second configuration information for hop 0 includes at least one of the following:

[0485] The configuration of the secondary link relay adaptation layer protocol entity that is equivalent to the source terminal and the first hop relay terminal;

[0486] The configuration of the secondary link radio link control entity corresponding to the source terminal and the first hop relay terminal;

[0487] The configuration of the secondary link media access control entity corresponding to the source terminal and the first hop relay terminal;

[0488] Wherein, the 0th hop is a hop between the source terminal and the first hop relay terminal, and the first hop relay terminal is a relay terminal connected to the source terminal.

[0489] Optionally, the second configuration information for the Nth hop includes at least one of the following:

[0490] Configuration of the secondary link relay adaptation layer protocol entity for the Nth hop relay terminal and the destination terminal;

[0491] The configuration of the secondary link radio link control entity that is equivalent to the destination terminal for the Nth hop relay terminal;

[0492] The configuration of the secondary link media access control entity that is equivalent to the destination terminal for the Nth hop relay terminal;

[0493] Wherein, the Nth hop is a hop between the Nth hop relay terminal and the destination terminal, and the Nth hop relay terminal is a relay terminal connected to the destination terminal.

[0494] Optionally, the second configuration information of the Jth hop includes at least one of the following:

[0495] Configuration of the sub-link relay adaptation layer protocol entity for the J-th hop relay terminal and the J+1-th hop relay terminal;

[0496] Configuration of the secondary link radio link control entity corresponding to the J-th hop relay terminal and the J+1-th hop relay terminal;

[0497] Configuration of the secondary link media access control entity corresponding to the J-th hop relay terminal and the J+1-th hop relay terminal;

[0498] Wherein, the Jth hop is a hop between the adjacent Jth hop relay terminal and the J+1th hop relay terminal.

[0499] J is a positive integer greater than 1 and less than N.

[0500] As can be seen from the technical solutions of the above embodiments, the embodiments of this application obtain first information, which includes configuration information for establishing a bearer for secondary link communication, including first configuration information and N+1 sets of second configuration information, and then send configuration information corresponding to the other terminals in the secondary link communication (excluding the first terminal) according to the first information, thereby realizing the configuration of the bearer in U2U relay communication.

[0501] Based on the above embodiments, optionally, the radio frequency unit 2801 is used to receive a first message from the network-side device when in the RRC connection state, the first message including the first information.

[0502] Optionally, the radio frequency unit 2801 is further configured to send a second message to the network-side device, the second message including service information of the secondary link communication.

[0503] Optionally, the radio frequency unit 2801 is used for:

[0504] When in the RRC inactive or idle state, a third message is received from the network-side device. The third message includes a mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication.

[0505] The first information is obtained based on the service information of the secondary link communication and the mapping relationship.

[0506] Optionally, the radio frequency unit 2801 is used for:

[0507] When outside the network coverage area, pre-configuration information is obtained from the terminal pre-configuration, the pre-configuration information including the mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication;

[0508] The first information is obtained based on the service information of the secondary link communication and the mapping relationship.

[0509] Optionally, the radio frequency unit 2801 is configured to perform at least one of the following:

[0510] The first configuration information is obtained based on the first target parameter and the mapping relationship;

[0511] Based on the N+1 sets of second target parameters and the mapping relationship, the N+1 sets of second configuration information are obtained;

[0512] Wherein, the first target parameter is an end-to-end related target parameter, and the second target parameter is a hop-related target parameter in the secondary link communication. Each set of second target parameters corresponds to a hop corresponding to the source terminal or one of the N relay terminals in the secondary link communication.

[0513] Optionally, the service information of the secondary link communication includes at least one of the following:

[0514] The source layer 2 identifier corresponding to the source terminal;

[0515] The destination layer 2 identifier corresponding to the source terminal;

[0516] The source layer 2 identifier corresponding to the destination terminal;

[0517] The destination layer 2 identifier corresponding to the destination terminal;

[0518] Source Layer 2 identifiers corresponding to N relay terminals;

[0519] The destination layer 2 identifiers corresponding to N relay terminals;

[0520] The first target parameter is an end-to-end related target parameter;

[0521] N+1 sets of second target parameters, each set of second target parameters being the target parameters related to each jump;

[0522] Terminal type information.

[0523] Optionally, the target parameters include QoS parameters.

[0524] As can be seen from the technical solutions of the above embodiments, the embodiments of this application can obtain the first information by using different methods according to the different network states of the first terminal, thereby flexibly realizing the bearer configuration of U2U secondary link relay communication.

[0525] Based on the above embodiments, optionally, when the relay communication device is the source terminal, the first configuration module 2402 is configured to perform at least one of the following:

[0526] The first configuration information is sent to the destination terminal through the secondary link radio resource control process;

[0527] The communication sub-link radio resource control process sends N+1 sets of second configuration information to the first hop relay terminal; wherein, the first hop relay terminal is a relay terminal connected to the first terminal.

[0528] Optionally, the radio frequency unit 2801 is further configured to receive a configuration success message or configuration failure message of the first configuration information from the destination terminal.

[0529] Optionally, the radio frequency unit 2801 is further configured to receive a configuration success message or configuration failure message of the N+1 sets of second configuration information from the first hop relay terminal.

[0530] Optionally, the processor 2810 is further configured to:

[0531] If a configuration success message for the first configuration information is received from the target terminal and a configuration success message for the N+1 sets of second configuration information is received from the first hop relay terminal, it is determined that the secondary link communication configuration is successful.

[0532] or,

[0533] If a configuration failure message for the first configuration information is received from the target terminal, and / or a configuration failure message for the N+1 sets of second configuration information is received from the first hop relay terminal, the secondary link communication configuration is determined to have failed.

[0534] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication when the first terminal is the source terminal by sending the first configuration information to the destination terminal and transmitting the second configuration information hop by hop to the relay terminal.

[0535] Based on the above embodiments, optionally, when the relay communication device is one of the N relay terminals and N=1, the processor 2810 is used to:

[0536] The first configuration information and the second configuration information corresponding to the source terminal are sent to the source terminal through the secondary link radio resource control procedure.

[0537] The first configuration information and the second configuration information corresponding to the target terminal are sent to the target terminal through the secondary link radio resource control procedure.

[0538] Optionally, the radio frequency unit 2801 is further configured to:

[0539] Receive a configuration success message or configuration failure message from the source terminal for the first configuration information and the second configuration information;

[0540] Receive a configuration success message or configuration failure message from the target terminal for the first configuration information and the second configuration information.

[0541] Optionally, the processor 2810 is further configured to:

[0542] If a configuration success message for the first configuration information and the second configuration information is received from the source terminal, and a configuration success message for the first configuration information and the second configuration information is received from the target terminal, then the secondary link communication configuration is determined to be successful.

[0543] or,

[0544] If a configuration failure message for the first configuration information and the second configuration information is received from the source terminal, and / or a configuration failure message for the first configuration information and the second configuration information is received from the target terminal, the secondary link communication configuration is determined to have failed.

[0545] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication when the first terminal is the source terminal by sending the first configuration information and the corresponding second configuration information to the source terminal and the destination terminal respectively.

[0546] Based on the above embodiments, optionally, when the relay communication device is one of the N relay terminals and N is greater than 1, the processor 2810 is configured to perform at least one of the following:

[0547] The second configuration information (M1+1 sets) and the first configuration information corresponding to the upstream link of the first terminal are sent to the first upstream terminal through the secondary link radio resource control process.

[0548] The second configuration information (M2+1 sets) and the first configuration information corresponding to the downstream link of the first terminal are sent to the first downstream terminal through the secondary link radio resource control process.

[0549] The upstream link of the relay communication device includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal. The first upstream terminal is a relay terminal or source terminal connected to the relay communication device in the upstream link. The downstream link includes M2 relay terminals between the relay communication device and the destination terminal, as well as the destination terminal. The first downstream terminal is a relay terminal or destination terminal connected to the relay communication device in the downstream link. M1 and M2 are integers greater than or equal to 0, and M1 + M2 = N - 1.

[0550] Optionally, the radio frequency unit 2801 is further configured to perform at least one of the following:

[0551] Receive from the first upstream terminal M1+1 sets of second configuration information corresponding to the upstream link and a configuration success message or configuration failure message of the first configuration information;

[0552] Receive the M2+1 sets of second configuration information corresponding to the downstream link and the configuration success message or configuration failure message of the first configuration information from the first downstream terminal.

[0553] Optionally, the processor 2810 is further configured to:

[0554] If the configuration success message of the M1+1 sets of second configuration information and the first configuration information corresponding to the upstream link is received from the first upstream terminal, and the configuration success message of the M2+1 sets of second configuration information and the first configuration information corresponding to the upstream link is received from the first downstream terminal, the sub-link communication configuration is determined to be successful.

[0555] or,

[0556] If the configuration failure message of the second configuration information M1+1 sets corresponding to the upstream link and the first configuration information is received from the first upstream terminal, and / or if the configuration failure message of the second configuration information M2+1 sets corresponding to the upstream link and the first configuration information is received from the first downstream terminal, it is determined that the sub-link communication configuration has failed.

[0557] Optionally, the processor 2810 is further configured to send a configuration failure event of the secondary link communication to the source terminal.

[0558] As can be seen from the technical solutions of the above embodiments, the embodiments of this application realize the bearer configuration of U2U secondary link relay communication by sending the corresponding second configuration information and first configuration information to the upstream link and the downstream link respectively.

[0559] This application embodiment also provides a terminal, including a processor and a communication interface. The processor is used to send configuration information corresponding to other terminals in the secondary link communication (excluding the first terminal) according to the first information. The communication interface is used to obtain the first information, which includes configuration information for establishing a bearer for the secondary link communication. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. Specifically, Figure 29 A schematic diagram of the hardware structure of a second terminal to implement an embodiment of this application.

[0560] The terminal 2900 includes, but is not limited to, at least some of the following components: radio frequency unit 2901, network module 2902, audio output unit 2903, input unit 2904, sensor 2905, display unit 2906, user input unit 2907, interface unit 2908, memory 2909, and processor 2910.

[0561] Those skilled in the art will understand that the terminal 2900 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 2910 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 29 The terminal structure shown does not constitute a limitation on the second terminal. The second terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0562] It should be understood that, in this embodiment, the input unit 2904 may include a graphics processing unit (GPU) 29041 and a microphone 29042. The GPU 29041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 2906 may include a display panel 29061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 2907 includes at least one of a touch panel 29071 and other input devices 29072. The touch panel 29071 is also called a touch screen. The touch panel 29071 may include a touch detection device and a touch controller. Other input devices 29072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0563] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 2901 can transmit it to the processor 2910 for processing; in addition, the radio frequency unit 2901 can send uplink data to the network-side device. Typically, 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, etc.

[0564] The memory 2909 can be used to store software programs or instructions, as well as various data. The memory 2909 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback function, image playback function, etc.). Furthermore, the memory 2909 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 2909 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0565] Processor 2910 may include one or more processing units; optionally, processor 2910 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 2910.

[0566] The radio frequency unit 2901 is used to receive L sets of second configuration information and first configuration information from the 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 used to send L-1 sets of second configuration information and first configuration information, excluding the 1 set of second configuration information corresponding to the hop between the third terminal and the second terminal, to the fourth terminal.

[0567] Wherein, the relay communication device is the Kth hop relay terminal among the N relay terminals of the secondary link communication; the first configuration information is the end-to-end configuration information in the bearer configuration information for establishing the secondary link communication; the second configuration information is the configuration information corresponding to each hop in the bearer configuration information, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals; the first configuration information and the second configuration information are determined by the first terminal, which is either the source terminal of the secondary link communication or one of the N relay terminals in the secondary link communication; N, K, and L are all positive integers, and L and K are less than or equal to N+1; the third terminal is the same terminal as the first terminal or a different terminal; if the third terminal is a different terminal from the first terminal, at least one of the following conditions must be met:

[0568] The third terminal is one of the M1 relay terminals in the upstream link of the first terminal;

[0569] The third terminal is one of the M2 relay terminals in the downstream link of the first terminal;

[0570] The upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal; the downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal, where M1 and M2 are integers greater than or equal to 0, and M1+M2=N-1.

[0571] Optionally, both the third terminal and the first terminal are source terminals, the relay communication device is a first-hop relay terminal, and the radio frequency unit 2901 is used for:

[0572] Receive N+1 sets of second configuration information and the first configuration information from the source terminal;

[0573] The processor 2910 is configured to perform any of the following:

[0574] Send to the fourth terminal N sets of second configuration information, excluding the set of second configuration information corresponding to the (K-1)th hop, and the first configuration information;

[0575] If it is determined that the second configuration information corresponding to the first hop relay terminal can be applied, the fourth terminal sends N sets of second configuration information, except for the set of second configuration information corresponding to the (K-1)th hop.

[0576] The fourth terminal is either the second-hop relay terminal or the destination terminal.

[0577] Optionally, the third terminal is the (K-1)th hop relay terminal, and the radio frequency unit 2901 is used for:

[0578] Receive N+2-K sets of second configuration information and the first configuration information from the (K-1)th hop relay terminal;

[0579] The processor 2910 is configured to perform any of the following:

[0580] Send to the fourth terminal N+1-K sets of second configuration information, excluding the set of second configuration information corresponding to the K-1th hop, and the first configuration information;

[0581] If it is determined that the second configuration information corresponding to the relay communication device can be applied, the fourth terminal is sent with N+1-K sets of second configuration information and first configuration information, except for the set of second configuration information corresponding to the K-1th hop.

[0582] The fourth terminal is either the (K+1)th hop relay terminal or the destination terminal.

[0583] Optionally, the third terminal is a K+1 hop relay terminal, and the second transmission module 2601 is used for:

[0584] Receive K+1 sets of second configuration information and first configuration information from the K+1th hop relay terminal;

[0585] The processor 2910 is configured to perform any of the following:

[0586] Send the K sets of second configuration information, excluding the set of second configuration information corresponding to the Kth hop, and the first configuration information to the fourth terminal;

[0587] If it is determined that the second configuration information corresponding to the relay communication device can be applied, the fourth terminal is sent with K sets of second configuration information other than the one set of second configuration information corresponding to the Kth hop and the first configuration information.

[0588] The fourth terminal is either the (K-1)th hop relay terminal or the source terminal.

[0589] Optionally, the processor 2910 is used for:

[0590] If it is determined that the second configuration information corresponding to the relay communication device has been successfully applied and a configuration success message for the L-1 sets of second configuration information and first configuration information has been received from the fourth terminal, a configuration success message for the L sets of second configuration information and first configuration information is sent to the third terminal.

[0591] or,

[0592] If it is determined that the second configuration information corresponding to the relay communication device has not been successfully applied, and / or, if a configuration failure message for the L-1 sets of second configuration information and first configuration information is received from the fourth terminal, a configuration failure message for the L sets of second configuration information and first configuration information is sent to the third terminal.

[0593] As can be seen from the technical solutions of the above embodiments, the embodiments of this application receive L sets of second configuration information and first configuration information from the third terminal, and send L-1 sets of second configuration information and first configuration information, excluding the 1 set of second configuration information corresponding to the one hop between the third terminal and the second terminal, to the fourth terminal, thereby clarifying the role of the relay terminal in the bearer configuration process of the secondary link relay communication and realizing the bearer configuration of U2U secondary link relay communication.

[0594] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described relay communication method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0595] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0596] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described relay communication method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0597] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0598] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described relay communication method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0599] This application also provides a relay communication system, including a first terminal and a second terminal. The first terminal can be used to perform the steps related to the first terminal in the relay communication method described above, and the second terminal can be used to perform the steps related to the second terminal in the relay communication method described above.

[0600] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0601] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0602] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A relay communication method, characterized in that, include: The first terminal obtains first information, which includes configuration information for the bearer used to establish secondary link communication; The first terminal sends configuration information corresponding to the other terminals in the secondary link communication, based on the first information; Wherein, the first terminal is either the source terminal in the secondary link communication or one of the N relay terminals in the secondary link communication; the first information includes first configuration information and N+1 sets of second configuration information, the first configuration information is the end-to-end configuration information in the configuration information carried, the second configuration information is the configuration information corresponding to each hop in the configuration information carried, and each set of second configuration information corresponds to a hop in the secondary link communication corresponding to the source terminal or a hop corresponding to one of the N relay terminals, where N is a positive integer.

2. The method according to claim 1, characterized in that, The first terminal acquires first information, including: When the first terminal is in RRC connection state, the first terminal receives a first message from the network-side device, the first message including the first information.

3. The method according to claim 2, characterized in that, Before the first terminal receives the first message from the network-side device, the method further includes: The first terminal sends a second message to the network-side device, the second message including the service information of the secondary link communication.

4. The method according to claim 1, characterized in that, The first terminal acquires first information, including: When the first terminal is in an RRC inactive state or an idle state, the first terminal receives a third message from the network-side device. The third message includes a mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication. The first terminal obtains the first information based on the service information of the secondary link communication and the mapping relationship.

5. The method according to claim 1, characterized in that, The first terminal acquires first information, including: When the first terminal is outside the network coverage area, the first terminal obtains pre-configuration information from the terminal pre-configuration, the pre-configuration information including the mapping relationship between the configuration information and service information of the bearer used to establish the secondary link communication; The first terminal obtains the first information based on the service information of the secondary link communication and the mapping relationship.

6. The method according to claim 4 or 5, characterized in that, The first terminal obtains the first information based on the service information of the secondary link communication and the mapping relationship, including at least one of the following: The first configuration information is obtained based on the first target parameter and the mapping relationship; Based on the N+1 sets of second target parameters and the mapping relationship, the N+1 sets of second configuration information are obtained; Wherein, the first target parameter is an end-to-end related target parameter, and the second target parameter is a hop-related target parameter in the secondary link communication. Each set of second target parameters corresponds to a hop corresponding to the source terminal or a hop corresponding to one of the N relay terminals in the secondary link communication.

7. The method according to any one of claims 3-5, characterized in that, The service information of the secondary link communication includes at least one of the following: The source layer 2 identifier corresponding to the source terminal; The destination layer 2 identifier corresponding to the source terminal; The source layer 2 identifier corresponding to the destination terminal; The destination layer 2 identifier corresponding to the destination terminal; Source Layer 2 identifiers corresponding to N relay terminals; The destination layer 2 identifiers corresponding to 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 the target parameters related to each jump; Terminal type information.

8. The method according to claim 6 or 7, characterized in that, The target parameters include QoS parameters.

9. The method according to claim 1, characterized in that, When the first terminal is the source terminal, the first terminal sends configuration information corresponding to the other terminals in the secondary link communication according to the first information, including at least one of the following: The first terminal sends the first configuration information to the destination terminal through the secondary link radio resource control process; The first terminal communication secondary link radio resource control process sends N+1 sets of second configuration information to the first hop relay terminal; wherein, the first hop relay terminal is a relay terminal connected to the first terminal.

10. The method according to claim 9, characterized in that, After sending the first configuration information to the destination terminal via the secondary link radio resource control procedure, the method further includes: 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 according to claim 9, characterized in that, After sending N+1 sets of second configuration information to the first-hop relay terminal during the communication sub-link radio resource control process, the method further includes: The first terminal receives a configuration success message or configuration failure message for the N+1 sets of second configuration information from the first hop relay terminal.

12. The method according to claim 9, characterized in that, After the first terminal sends configuration information corresponding to the other terminals in the secondary link according to the first information, the method further includes: When the first terminal receives a configuration success message for the first configuration information from the destination terminal and a configuration success message for the N+1 sets of second configuration information from the first hop relay terminal, the first terminal determines that the secondary link communication configuration is successful. or, If the first terminal receives a configuration failure message for the first configuration information from the destination terminal, and / or receives a configuration failure message for the N+1 sets of second configuration information from the first hop relay terminal, the first terminal determines that the secondary link communication configuration has failed.

13. The method according to claim 1, characterized in that, When the first terminal is one of the N relay terminals, and N=1, the first terminal sends configuration information corresponding to the other terminals in the secondary link communication according to the first information, including at least one of the following: The first terminal sends the first configuration information and the second configuration information corresponding to the source terminal to the source terminal through the secondary link radio resource control procedure; The first terminal sends the first configuration information and the second configuration information corresponding to the target terminal to the target terminal through the secondary link radio resource control procedure.

14. The method according to claim 13, characterized in that, After the first terminal sends configuration information corresponding to the other terminals in the secondary link according to the first information, the method further includes at least one of the following: The first terminal receives a configuration success message or a configuration failure message from the source terminal for the first configuration information and the second configuration information; The first terminal receives a configuration success message or configuration failure message from the destination terminal for the first configuration information and the second configuration information.

15. The method according to claim 13, characterized in that, After the first terminal sends configuration information corresponding to the other terminals in the secondary link according to the first information, the method further includes: If the first terminal receives a configuration success message for the first configuration information and the second configuration information from the source terminal, and also receives a configuration success message for the first configuration information and the second configuration information from the destination terminal, the first terminal determines that the secondary link communication configuration is successful. or, If the first terminal receives a configuration failure message for the first configuration information and the second configuration information from the source terminal, and / or receives a configuration failure message for the first configuration information and the second configuration information from the destination terminal, the first terminal determines that the secondary link communication configuration has failed.

16. The method according to claim 1, characterized in that, When the first terminal is one of the N relay terminals and N is greater than 1, the first terminal sends configuration information corresponding to the other terminals in the secondary link communication according to the first information, including at least one of the following: The first terminal sends the M1+1 set of second configuration information and the first configuration information corresponding to the upstream link of the first terminal to the first upstream terminal through the secondary link radio resource control process; The first terminal sends the M2+1 set of second configuration information and the first configuration information corresponding to the downstream link of the first terminal to the first downstream terminal through the secondary link radio resource control process; Wherein, the upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal. The first upstream terminal is either a relay terminal or a source terminal connected to the first terminal in the upstream link of the first terminal. The downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal. The first downstream terminal is either a relay terminal or a destination terminal connected to the first terminal in the downstream link of the first terminal. Wherein, M1 and M2 are integers greater than or equal to 0, and M1 + M2 = N - 1.

17. The method according to claim 16, characterized in that, After the first terminal sends configuration information corresponding to the other terminals in the secondary link according to the first information, the method further includes at least one of the following: The first terminal receives from the first upstream terminal M1+1 sets of second configuration information corresponding to the upstream link of the first terminal and a configuration success message or configuration failure message of the first configuration information; The first terminal receives from the first downstream terminal the M2+1 set of second configuration information corresponding to the downstream link of the first terminal and the configuration success message or configuration failure message of the first configuration information.

18. The method according to claim 16, characterized in that, After the first terminal sends configuration information corresponding to the other terminals in the secondary link according to the first information, the method further includes: When the first terminal receives the configuration success message of the first configuration information and the first configuration information corresponding to the upstream link of the first terminal from the first upstream terminal, and receives the configuration success message of the first configuration information and the 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 sub-link communication configuration is successful. or, When the first terminal receives M1+1 sets of second configuration information and a configuration failure message for the first configuration information corresponding to the upstream link of the first terminal from the first upstream terminal, and / or receives M2+1 sets of second configuration information and a configuration failure message for the first configuration information corresponding to the upstream link of the first terminal from the first downstream terminal, the first terminal determines that the secondary link communication configuration has failed.

19. The method according to claim 15 or 18, characterized in that, If the first terminal determines that the secondary link communication configuration has failed, the method further includes: The first terminal sends a configuration failure event for the secondary link communication to the source terminal.

20. The method according to claim 1, characterized in that, The first configuration information includes at least one of the following: End-to-end secondary link radio bearer identifier; The source terminal and destination terminal are equivalent secondary link service data adaptation protocol entity configurations. The configuration of the secondary link packet data aggregation protocol entity for the source terminal and the destination terminal.

21. The method according to claim 1, characterized in that, The second configuration information for hop 0 includes at least one of the following: The configuration of the secondary link relay adaptation layer protocol entity that is equivalent to the source terminal and the first hop relay terminal; The configuration of the secondary link radio link control entity corresponding to the source terminal and the first hop relay terminal; The configuration of the secondary link media access control entity corresponding to the source terminal and the first hop relay terminal; Wherein, the 0th hop is a hop between the source terminal and the first hop relay terminal, and the first hop relay terminal is a relay terminal connected to the source terminal.

22. The method according to claim 1, characterized in that, The second configuration information for the Nth hop includes at least one of the following: Configuration of the secondary link relay adaptation layer protocol entity for the Nth hop relay terminal and the destination terminal; The configuration of the secondary link radio link control entity that is equivalent to the destination terminal for the Nth hop relay terminal; The configuration of the secondary link media access control entity that is equivalent to the destination terminal for the Nth hop relay terminal; Wherein, the Nth hop is a hop between the Nth hop relay terminal and the destination terminal, and the Nth hop relay terminal is a relay terminal connected to the destination terminal.

23. The method according to claim 1, characterized in that... The second configuration information for the Jth hop includes at least one of the following: Configuration of the sub-link relay adaptation layer protocol entity for the J-th hop relay terminal and the J+1-th hop relay terminal; Configuration of the secondary link radio link control entity corresponding to the J-th hop relay terminal and the J+1-th hop relay terminal; Configuration of the secondary link media access control entity corresponding to the J-th hop relay terminal and the J+1-th hop relay terminal; Wherein, the Jth hop is a hop between the adjacent Jth hop relay terminal and the J+1th hop relay terminal; J is a positive integer greater than 1 and less than N.

24. A relay communication device, characterized in that, include: The first transmission module is used to acquire first information, the first information including configuration information of the bearer for establishing secondary link communication; The first configuration module is used to send configuration information corresponding to the other terminals in the secondary link communication, excluding the relay communication device, according to the first information. Wherein, the relay communication device is the source terminal in the secondary link communication or one of the N relay terminals in the secondary link communication; the first information includes first configuration information and N+1 sets of second configuration information, the first configuration information is the end-to-end configuration information in the configuration information carried, the second configuration information is the configuration information corresponding to each hop in the configuration information carried, and each set of second configuration information corresponds to a hop in the secondary link communication corresponding to the source terminal or a hop corresponding to one of the N relay terminals, where N is a positive integer.

25. A relay communication method, characterized in that, include: 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. The second terminal sends L-1 sets of second configuration information and first configuration information, excluding the one set of second configuration information corresponding to the one hop between the third terminal and the second terminal, to the fourth terminal; Wherein, the second terminal is the Kth hop relay terminal among the N relay terminals of the secondary link communication; the first configuration information is the end-to-end configuration information in the configuration information for establishing the bearer of the secondary link communication; the second configuration information is the configuration information corresponding to each hop in the configuration information of the bearer, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals; the first configuration information and the second configuration information are determined by the first terminal, which is the source terminal of the secondary link communication or one of the N relay terminals in the secondary link communication; N, K, and L are all positive integers, and L and K are less than or equal to N+1; the third terminal is the same terminal as the first terminal or a different terminal; if the third terminal is a different terminal from the first terminal, at least one of the following conditions must be met: The third terminal is one of the M1 relay terminals in the upstream link of the first terminal; The third terminal is one of the M2 relay terminals in the downstream link of the first terminal; The upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal; the downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal, where M1 and M2 are integers greater than or equal to 0, and M1+M2=N-1.

26. The method according to claim 25, characterized in that, Both the third terminal and the first terminal are source terminals, and the second terminal is a first-hop relay terminal. The second terminal receives L sets of second configuration information and first configuration information from the third terminal, including: The first hop relay terminal receives N+1 sets of second configuration information and the first configuration information from the source terminal; The first-hop relay terminal sends L-1 sets of second configuration information and first configuration information, excluding the one set of second configuration information corresponding to the hop between the third terminal and the second terminal, to the fourth terminal, including any one of the following: The second terminal sends the fourth terminal N sets of second configuration information, excluding the one set of second configuration information corresponding to the (K-1)th hop, and the first configuration information; If the second terminal determines that it can apply the second configuration information corresponding to the first hop relay terminal, it sends N sets of second configuration information, except for the one set of second configuration information corresponding to the K-1th hop, to the fourth terminal. The fourth terminal is either the second-hop relay terminal or the destination terminal.

27. The method according to claim 25, characterized in that, The third terminal is the (K-1)th hop relay terminal, and the second terminal receives L sets of second configuration information and first configuration information from the third terminal, including: The Kth hop relay terminal receives N+2-K sets of second configuration information and the first configuration information from the (K-1)th hop relay terminal; The second terminal sends L-1 sets of second configuration information and first configuration information, excluding the one set of second configuration information corresponding to the one hop between the third terminal and the second terminal, to the fourth terminal, including any one of the following: The Kth hop relay terminal sends to the fourth terminal N+1-K sets of second configuration information, excluding the set of second configuration information corresponding to the K-1th hop, and the first configuration information; If the Kth hop relay terminal determines that it can apply the second configuration information corresponding to the Kth hop relay terminal, it sends the remaining N+1-K sets of second configuration information and first configuration information, except for the one set of second configuration information corresponding to the K-1th hop, to the fourth terminal. The fourth terminal is either the (K+1)th hop relay terminal or the destination terminal.

28. The method according to claim 25, characterized in that, The third terminal is a K+1 hop relay terminal, and the second terminal receives L sets of second configuration information and first configuration information from the third terminal, including: The Kth hop relay terminal receives K+1 sets of second configuration information and first configuration information from the K+1th hop relay terminal; The second terminal sends L-1 sets of second configuration information, excluding the one set of second configuration information corresponding to the one hop between the third terminal and the second terminal, and the first configuration information to the fourth terminal, including any one of the following: The Kth hop relay terminal sends to the fourth terminal K sets of second configuration information, excluding the 1 set of second configuration information corresponding to the Kth hop, and the first configuration information; If the Kth hop relay terminal determines that it can apply the second configuration information corresponding to the Kth hop, it sends the K sets of second configuration information other than the 1 set of second configuration information corresponding to the Kth hop relay terminal and the first configuration information to the fourth terminal. The fourth terminal is either the (K-1)th hop relay terminal or the source terminal.

29. The method according to claim 25, characterized in that, When the second terminal receives L sets of second configuration information from the third terminal, the method further includes: If the second terminal determines that the second configuration information corresponding to the second terminal has been successfully applied and receives a configuration success message for the L-1 sets of second configuration information and first configuration information from the fourth terminal, the second terminal sends a configuration success message for the L sets of second configuration information and first configuration information to the third terminal. or, If it is determined that the second configuration information corresponding to the second terminal has not been successfully applied, and / or if a configuration failure message for the L-1 sets of second configuration information and first configuration information is received from the fourth terminal, the second terminal sends a configuration failure message for the L sets of second configuration information and first configuration information to the third terminal.

30. A relay communication device, characterized in that, include: The second transmission module is used to receive L sets of second configuration information and first configuration information from the third terminal, and to 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 is used to send L-1 sets of second configuration information and first configuration information, excluding the set of second configuration information corresponding to the relay communication device, to the fourth terminal. Wherein, the relay communication device is the Kth hop relay terminal among the N relay terminals of the secondary link communication; the first configuration information is the end-to-end configuration information in the bearer configuration information for establishing the secondary link communication; the second configuration information is the configuration information corresponding to each hop in the bearer configuration information, and each set of second configuration information corresponds to a hop corresponding to the source terminal in the secondary link communication or a hop corresponding to one of the N relay terminals; the first configuration information and the second configuration information are determined by the first terminal, which is either the source terminal of the secondary link communication or one of the N relay terminals in the secondary link communication; N, K, and L are all positive integers, and L and K are less than or equal to N+1; the third terminal is the same terminal as the first terminal or a different terminal; if the third terminal is a different terminal from the first terminal, at least one of the following conditions must be met: The third terminal is one of the M1 relay terminals in the upstream link of the first terminal; The third terminal is one of the M2 relay terminals in the downstream link of the first terminal; The upstream link of the first terminal includes M1 relay terminals between the source terminal and the first terminal, as well as the source terminal; the downstream link of the first terminal includes M2 relay terminals between the first terminal and the destination terminal, as well as the destination terminal, where M1 and M2 are integers greater than or equal to 0, and M1+M2=N-1.

31. A first terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the relay communication method as described in any one of claims 1 to 23.

32. A second terminal, characterized in that, It includes a processor and a memory, the memory storing a program or instructions that can run on the processor, the program or instructions being executed by the processor to implement the steps of the relay communication method as described in any one of claims 25 to 29.

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

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