SL configuration auxiliary method, first terminal and network side equipment

Abstract

The invention discloses an SL configuration assisting method, a first terminal and network side equipment, and belongs to the technical field of communication, and the SL configuration assisting method of the embodiment of the invention comprises the steps that the first terminal sends SL auxiliary information to the network side equipment; wherein the SL auxiliary information represents a mapping relation between at least one PC5 quality of service flow (QoS flow) and at least one SL frequency point, and the SL auxiliary information is used for assisting in performing SL radio bearer (SL-RB) configuration.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a SL configuration assistance method, a first terminal and a network side device. Background Art

[0002] In the Long Term Evolution (LTE) sidelink (SL) carrier aggregation (CA) framework, the terminal upper layer determines the mapping relationship between services and frequencies, and provides the access stratum (AS) with the mapping between the destination layer 2 (Destination Layer-2) identifier ID and the SL frequency.

[0003] For the New Radio (NR) SL CA scenario, if the LTE SL CA framework is used for SL wireless bearer configuration, it may make it difficult for the terminal to operate according to the frequency specified by the upper layer, so the LTE SL CA framework cannot be reused.

[0004] Therefore, for the NR SL CA scenario, the problem of how to correctly configure the SL wireless bearer needs to be solved urgently. Summary of the invention

[0005] The embodiments of the present application provide a SL configuration assistance method, a first terminal and a network side device, which can assist in the accurate configuration of the SL wireless bearer in the NR SL CA scenario.

[0006] In a first aspect, a configuration assistance method for a secondary link SL is provided, which is performed by a first terminal, and the method includes:

[0007] The first terminal sends SL auxiliary information to the network side device; wherein the SL auxiliary information represents the mapping relationship between at least one PC5 service quality flow QoS flow and at least one SL frequency point, and the SL auxiliary information is used to assist in the SL wireless bearer SL-RB configuration.

[0008] In a second aspect, a configuration assistance method for a secondary link SL is provided, which is performed by a network side device, and the method includes:

[0009] The network side device receives SL auxiliary information from the first terminal; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 quality of service flow QoS flow and at least one SL frequency point;

[0010] The network side device sends first wireless bearer configuration information to the first terminal; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL wireless bearer SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0011] In a third aspect, a configuration assistance method for a secondary link SL is also provided, which is performed by a first terminal, and the method includes:

[0012] The first terminal obtains second radio bearer configuration information; wherein the second radio bearer configuration information includes a mapping relationship between at least one SL radio bearer SL-RB and at least one PC5 service quality flow QoS flow;

[0013] The first terminal performs an SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point.

[0014] In a fourth aspect, a configuration auxiliary device for a secondary link SL is provided, the device comprising:

[0015] The first sending module is used to send SL auxiliary information to the network side device; wherein the SL auxiliary information represents the mapping relationship between at least one PC5 service quality flow QoS flow and at least one SL frequency point, and the SL auxiliary information is used to assist in the SL wireless bearer SL-RB configuration.

[0016] In a fifth aspect, a configuration auxiliary device for a secondary link SL is provided, the device comprising:

[0017] A receiving module, configured to receive SL auxiliary information from a first terminal; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 quality of service flow QoS flow and at least one SL frequency point;

[0018] The second sending module is used to send the first wireless bearer configuration information to the first terminal; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL wireless bearer SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0019] In a sixth aspect, a configuration auxiliary device for a secondary link SL is provided, the device comprising:

[0020] An acquisition module, configured to acquire second radio bearer configuration information; wherein the second radio bearer configuration information includes a mapping relationship between at least one SL radio bearer SL-RB and at least one PC5 service quality flow QoS flow;

[0021] The first processing module is used to perform SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point.

[0022] In the seventh aspect, a first terminal is provided, which includes a processor and a memory, wherein the memory stores a program or instruction that can be executed on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the third aspect are implemented.

[0023] In an eighth aspect, a first terminal is provided, comprising a processor and a communication interface, wherein the communication interface is used to: send SL auxiliary information to a network side device; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 service quality flow QoSflow and at least one SL frequency point, and the SL auxiliary information is used to assist in SL radio bearer SL-RB configuration;

[0024] Alternatively, the processor is used to: obtain second wireless bearer configuration information; wherein the second wireless bearer configuration information includes a mapping relationship between at least one SL wireless bearer SL-RB and at least one PC5 service quality flow QoS flow, and the communication interface is used to: based on the second wireless bearer configuration information and the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, perform SL-RB configuration operations on the target QoS flow to be transmitted.

[0025] In a ninth aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0026] In the tenth aspect, a network side device is provided, including a processor and a communication interface, wherein the communication interface is used to: receive SL auxiliary information from a first terminal; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 service quality flow QoS flow and at least one SL frequency point; send first wireless bearer configuration information to the first terminal; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL wireless bearer SL-RB and at least one PC5 QoSflow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0027] In the eleventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented, or the steps of the method described in the third aspect are implemented.

[0028] In the twelfth aspect, a wireless communication system is provided, including: a first terminal and a network side device, wherein the first terminal can be used to execute the steps of the method described in the first aspect, or execute the steps of the method described in the third aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0029] In the thirteenth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the method as described in the first aspect, or the method as described in the second aspect, or the method as described in the third aspect.

[0030] In the fourteenth aspect, a computer program / program product is provided, wherein the computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the configuration assistance method of the secondary link SL as described in the first aspect, or implement the steps of the configuration assistance method of the secondary link SL as described in the second aspect, or implement the steps of the configuration assistance method of the secondary link SL as described in the third aspect.

[0031] In an embodiment of the present application, a configuration assistance method for SL adapted to the NR SL CA scenario is provided. Specifically, the first terminal sends SL auxiliary information to the network side device. The above SL auxiliary information represents a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point. Therefore, the network side device can use the mapping relationship represented by the SL auxiliary information to assist in SL-RB configuration, so as to adapt to the granularity of the PC5 QoS flow level of NR SL, that is, a frequency mapping method that can adapt to the PC5QoS flow level is proposed. After using the above mapping relationship to assist in SL-RB configuration, the first terminal can operate according to the frequency point specified by the upper layer protocol of the terminal, so as to realize accurate configuration of the SL wireless bearer in the NR SL CA scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a block diagram of a wireless communication system to which the embodiments of the present application can be applied;

[0033] Figure 2 is an example block diagram of SL in the related art;

[0034] Figure 3 It is a schematic diagram of the inter-layer interaction between the UE upper layer and the access layer in the related art;

[0035] Figure 4 It is a signaling interaction diagram for NR SL unicast communication between UE1 and UE2 when UE1 is in RRC connected state in the related art;

[0036] Figure 5 It is a signaling interaction diagram for UE1 to perform NR SL multicast and / or broadcast communication with UE2 when UE1 is in an RRC connected state in the related art;

[0037] Figure 6 It is a signaling interaction diagram for performing NR SL unicast communication with UE2 when UE1 is in an RRC inactive state or an idle state in the related art;

[0038] Figure 7 It is a signaling interaction diagram for performing NR SL multicast and / or broadcast communication with UE2 when UE1 is in an RRC inactive state or an idle state in the related art;

[0039] Figure 8 It is a signaling interaction diagram of NR SL unicast communication between UE1 and UE2 when UE1 is in OOC state in the related art;

[0040] Fig. 9 It is a signaling interaction diagram for UE1 to perform NR SL multicast and / or broadcast communication with UE2 when UE1 is in the OOC state in the related art;

[0041] Fig.10This is one of the flowcharts of the SL configuration assistance method provided in the embodiment of the present application;

[0042] Fig.11 This is the second flow chart of the SL configuration assistance method provided in the embodiment of the present application;

[0043] Fig.12 This is the third flow chart of the SL configuration assistance method provided in the embodiment of the present application;

[0044] Fig.13 It is a signaling interaction diagram of the SL configuration assistance method provided in an embodiment of the present application;

[0045] Fig.14 It is one of the structural schematic diagrams of the SL configuration auxiliary device provided in the embodiment of the present application;

[0046] Fig.15 This is the second structural diagram of the SL configuration auxiliary device provided in the embodiment of the present application;

[0047] Fig.16 This is the third structural diagram of the SL configuration auxiliary device provided in the embodiment of the present application;

[0048] Fig.17 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0049] Fig.18 is a schematic diagram of the hardware structure of a first terminal implementing an embodiment of the present application;

[0050] Fig.19 It is a structural diagram of the network side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0052] The terms "first", "second", etc. of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object can be one or more. In addition, "or" in the present application represents at least one of the connected objects. For example, "A or B" covers three schemes, namely, Scheme 1: including A but not including B; Scheme 2: including B but not including A; Scheme 3: including both A and B. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0053] The term "indication" in this application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication; an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operation to be performed or the request result according to the judgment result.

[0054] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, 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) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the systems and radio technologies mentioned above as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following descriptions, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6 thGeneration, 6G) communication system.

[0055] Figure 1 is a block diagram of a wireless communication system to which the embodiments of the present application can be applied, such as Figure 1As shown, the wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle user equipment (VUE), a shipborne equipment, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (home equipment with wireless communication function, such as a refrigerator, a television, a washing machine or furniture, etc.), a game console, a personal computer (Personal Computer, PC), a teller machine or a self-service machine and other terminal side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (AccessPoint, AP) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station may be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a Relay Base Station (RBS), a Serving Base Station (SBS), a Base Transceiver Station (BTS), a radio base station, a radio transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a Home Node B (HNB), a Home Evolved Node B (home evolved Node B), a Transmission Reception Point (TRP) or other appropriate terms 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 the embodiments of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0056] The 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 (Mobility Management Entity, MME), access mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), user plane function (User Plane Function, UPF), policy control function (Policy Control Function, PCF), policy and charging rules function unit (Policy and Charging Rules Function, PCRF), edge application service discovery function (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data storage (Unified Data Repository, UDR), home user server (Home Subscriber Server, HSS), centralized network configuration (CNC), network storage function (Network Repository Function, NRF), network exposure function (Network Exposure Function, NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0057] In order to facilitate a clearer understanding of the technical solutions provided by the embodiments of the present application, some relevant background knowledge is first introduced as follows.

[0058] 1. Introduction to SL;

[0059] The LTE system supports SL (or side link, edge link, etc.) since the 12th release, which is used for direct data transmission between user equipment (UE) without going through network equipment.

[0060] Figure 2 is an example block diagram of SL in the related art, such as Figure 2As shown, the figure also includes examples of uplink (Uplink, UL) and downlink (Downlink, DL).

[0061] LTE SL is designed for specific public safety matters, such as emergency communications at fire sites or disaster sites such as earthquakes, or vehicle to everything (V2X) communications. Vehicle to everything communications include various services, such as basic safety communications, advanced (autonomous) driving, platooning, sensor expansion, etc. Since LTE SL only supports broadcast communications, it is mainly used for basic safety communications. Other advanced V2X services with strict QoS requirements in terms of latency, reliability, etc. will be supported by NR SL.

[0062] The 5G NR system can also support the SL interface for direct communication between terminals, and SL communication includes three transmission modes:

[0063] 1) SL broadcast communication;

[0064] 2) SL groupcast communication;

[0065] 3)SL unicast communication.

[0066] Unicast, as the name implies, is a one-to-one transmission. Multicast is a one-to-many transmission, and broadcast is also a one-to-many transmission, but broadcast does not have the concept of UEs belonging to the same group. Currently, SL unicast and multicast communications support the physical layer Hybrid Automatic Repeat Request (HARQ) feedback mechanism.

[0067] 2. SL CA and carrier selection / reselection;

[0068] In LTE SL, the SL CA transmission mode is supported, and the basic carrier selection or reselection process is as follows:

[0069] For specific V2X services, the upper layer of the UE provides the mapping relationship between service types and carrier frequencies to the access layer of the UE (mapping between V2X service types and V2X frequencies). During SL air interface transmission, the access layer of the UE needs to ensure that the corresponding service is sent on the corresponding carrier frequency.

[0070] If the UE works in the base station scheduling mode (Mode 1), the base station allocates SL resources according to the UE's SL buffer status report (Buffer Status Report, BSR) report and the information reported in the Sidelink UE Information message to ensure that the corresponding service is sent on the corresponding carrier frequency.

[0071] If the UE operates in UE autonomous mode (Mode 2), the access layer of the UE will perform the carrier selection or reselection process if the conditions for triggering carrier selection or reselection are met. Specifically, the following steps are included:

[0072] S3-1. When the UE determines that the conditions for triggering carrier selection or reselection are met, the UE executes the carrier selection or reselection process.

[0073] S3-2. Each (per) logical channel determines at least one carrier frequency point that is allowed to be used.

[0074] Figure 3 It is a schematic diagram of the inter-layer interaction between the UE upper layer and the access layer in the related technology, such as Figure 3 As shown, when service data (V2X service packets) arrive at at least one logical channel of the access layer (Acess Stratum, AS), at least one carrier frequency associated with each logical channel can be determined based on the inter-layer interaction information.

[0075] S3-3. Determine each carrier frequency point (hereinafter referred to as F1) in S3-1 one by one. After traversing at least one carrier frequency point, at least one candidate carrier (candidate carrier(s)) and / or at least one selected carrier (selected carrier(s)) can be determined.

[0076] Specifically, there are two situations: primary election and re-election:

[0077] Case 1: Carrier initial selection evaluation: If there is no SL grant on F1, further judgment is made:

[0078] If the channel busy ratio (CBR) of F1 is less than the first CBR threshold, F1 is included in the candidate carriers.

[0079] The first CBR threshold is determined by a network-configured or pre-configured first CBR-short distance communication data packet priority (ProSe Per-Packet Priority, PPPP) mapping relationship and a logical channel priority value corresponding to the logical channel.

[0080] The first CBR-PPPP mapping relationship is shown as follows:

[0081] priorityList-r15 SL-PriorityList-r13,

[0082] threshCBR-FreqReselection-r15 SL-CBR-r14 OPTIONAL,--Need OR.

[0083] Case 2: Carrier reselection evaluation: If there is SL grant on F1, further judgment is made:

[0084] If the CBR of F1 is less than the second CBR threshold, F1 continues to be selected, that is, F1 is included in the selected carrier;

[0085] If the CBR of F1 is greater than or equal to the second CBR threshold, it is considered that F1 meets the carrier reselection condition, that is, F1 is included in the candidate carrier.

[0086] The second CBR threshold is determined by a second CBR-PPPP mapping relationship configured by the network or preconfigured, and a logical channel priority value corresponding to the logical channel.

[0087] The second CBR-PPPP mapping relationship is as follows:

[0088] priorityList-r15 SL-PriorityList-r13,

[0089] threshCBR-FreqKeeping-r15 SL-CBR-r14 OPTIONAL--Need OR.

[0090] S3-4. Sort each carrier frequency point of at least one candidate carrier in S3-2 from small to large according to the CBR value of each carrier frequency point, and select part of the carrier frequency points of at least one candidate carrier in sequence starting from the carrier frequency point with the smallest CBR value. The specific number of carrier frequencies selected is determined by the UE capability, and these selected candidate carriers are also included in the selected carriers.

[0091] 3. Configuration method of SL-radio bearer (SL-RB);

[0092] The specific methods are divided into three categories according to the Radio Resource Control (RRC) state of the transmitting UE.

[0093] Category 1: The sending end (UE1) is in the RRC connected state, and the SL-RB related configuration comes from the configuration of the network side device dedicated message RRC Reconfiguration (RRCReconfiguration).

[0094] In case 1a, UE1 performs NR SL unicast communication with the receiving end (UE2).

[0095] Figure 4 It is a signaling interaction diagram of NR SL unicast communication between UE1 and UE2 when UE1 is in RRC connected state in the related art, such as Figure 4 As shown, the following steps are included:

[0096] S4-0. UE1 is in RRC connected state, and UE1 will conduct NR SL unicast communication with UE2.

[0097] S4-1, UE1 sends a SidelinkUEInformationNR message to the network. The SidelinkUEInformationNR message includes the destination L2 identifier (Destination Layer-2 ID), communication type (cast type), quality of service (QoS) parameters (QoS profile), and SL frequency (frequency) of the NR SL communication UE2.

[0098] S4-2. UE1 receives the RRCReconfiguration message sent by the network. The RRCReconfiguration message includes SL-RB related configuration, which is divided into SL-RB related configuration to be applied only by UE1 and SL-RB related configuration to be applied by both UE1 and UE2.

[0099] For SL-RB related configurations that are only to be applied by UE1, they take effect directly on UE1.

[0100] S4-3. UE1 sends the SL-RB related configuration to be applied to both UE1 and UE2 contained in the RRCReconfiguration message in S4-2 to UE2 through the RRCReconfigurationSidelink message.

[0101] S4-4. UE1 receives the RRCReconfigurationCompleteSidelink message fed back by UE2.

[0102] The SL-RB related configurations to be applied by both UE1 and UE2 take effect after the RRCReconfigurationCompleteSidelink message is determined.

[0103] After S4-4, UE1 and UE2 start NR SL unicast communication.

[0104] Case 1b: UE1 and UE2 conduct NR SL multicast and / or broadcast communication.

[0105] Figure 5 It is a signaling interaction diagram of UE1 performing NR SL multicast and / or broadcast communication with UE2 when UE1 is in RRC connected state in the related art, such as Figure 5 As shown, the following steps are included:

[0106] S5-0. UE1 is in RRC connected state, and UE1 will conduct NR SL multicast and / or broadcast communication with UE2.

[0107] S5-1. UE1 sends a SidelinkUEInformationNR message to the network. The SidelinkUEInformationNR message includes the Destination Layer-2 ID, communication type, QoS parameters, and SL frequency of the NR SL communication UE2.

[0108] S5-2. UE1 receives the RRCReconfiguration message sent by the network. The RRCReconfiguration message includes the SL-RB related configuration that only UE1 is to apply.

[0109] For SL-RB related configurations that are only to be applied by UE1, they take effect directly on UE1.

[0110] For SL-RB related configurations that are to be applied by both UE1 and UE2, both UE1 and UE2 apply the protocol agreed values. For example, the length of the sequence number (SN) of the Packet Data Convergence Protocol (PDCP) is fixed to 12 bits, the length of the SN of the Radio Link Control (RLC) is fixed to 6 bits, and the RLC mode is fixed to the Un-acknowledgement Mode (UM).

[0111] After S5-2, UE1 starts NR SL multicast and / or broadcast communication with the counterpart UE (UE2).

[0112] Category 2: UE1 is in RRC inactive state (RRC_INACTIVE) or idle state (RRC_IDLE), and the SL-RB related configuration comes from the configuration of the system information block (SIB) 12 broadcasted by the network side device.

[0113] In case 2a, UE1 and UE2 conduct NR SL unicast communication.

[0114] Figure 6 It is a signaling interaction diagram of NR SL unicast communication between UE1 and UE2 when UE1 is in RRC inactive state or idle state in the related art, such as Figure 6 As shown, the following steps are included:

[0115] S6-0, UE1 is in RRC inactive state or idle state, and UE1 will conduct NR SL unicast communication with the other UE (UE2).

[0116] S6-1. UE1 receives the SIB12 message sent by the network. The SIB12 message includes SL-RB related configuration, which is divided into SL-RB related configuration to be applied only by UE1 and SL-RB related configuration to be applied by both UE1 and UE2.

[0117] For SL-RB related configurations that are only to be applied by UE1, they take effect directly on UE1.

[0118] S6-2. If it is unicast, for the SL-RB related configuration contained in the SIB12 message that both UE1 and UE2 need to apply, UE1 sends it to UE2 via an RRCReconfigurationSidelink message.

[0119] S6-3. UE1 receives the RRCReconfigurationCompleteSidelink message fed back by UE2.

[0120] The SL-RB related configurations to be applied by both UE1 and UE2 take effect after the RRCReconfigurationCompleteSidelink message is determined.

[0121] After S6-3, UE1 and UE2 start NR SL unicast communication.

[0122] Case 2b: UE1 and UE2 conduct NR SL multicast and / or broadcast communication.

[0123] Figure 7 It is a signaling interaction diagram of UE1 performing NR SL multicast and / or broadcast communication with UE2 when UE1 is in RRC inactive state or idle state in the related art, such as Figure 7As shown, the following steps are included:

[0124] S7-0. UE1 is in RRC inactive state or idle state, and UE1 will conduct NR SL multicast and / or broadcast communication with UE2.

[0125] S7-1. UE1 receives the SIB12 message sent by the network. The SIB12 message includes SL-RB related configuration, which is divided into SL-RB related configuration to be applied only by UE1 and SL-RB related configuration to be applied by both UE1 and UE2.

[0126] For SL-RB related configurations that are only to be applied by UE1, they take effect directly on UE1.

[0127] If it is multicast and / or broadcast, for the SL-RB related configurations to be applied by both UE1 and UE2, both UE1 and UE2 apply the protocol agreed values. For example, the PDCP SN length is fixed to 12 bits, the RLC SN length is fixed to 6 bits, and the RLC mode is fixed to UM.

[0128] After S7-1, UE1 and UE2 start NR SL multicast and / or broadcast communication.

[0129] Category 3: UE1 is in the out-of-coverage (OOC) state, and the SL-RB related configuration comes from the configuration of the SL pre-configuration message (SL-PreconfigurationNR).

[0130] Case 3a: UE1 and UE2 conduct NR SL unicast communication.

[0131] Figure 8 This is a signaling interaction diagram of NR SL unicast communication between UE1 and UE2 when UE1 is in OOC state in the related art, such as Figure 8 shown.

[0132] It should be noted that the steps here are similar to those in case 2a. However, in case 2a, UE1 applies the public configuration of SL-RB by the network side device according to SIB12, but here UE1 is out of network coverage and cannot obtain SIB12, so it obtains SL-RB related configuration according to the SL pre-configuration message. The specific steps are not repeated here.

[0133] Case 3b: UE1 and UE2 conduct NR SL multicast and / or broadcast communication.

[0134] Fig. 9 It is a signaling interaction diagram of UE1 performing NR SL multicast and / or broadcast communication with UE2 when UE1 is in OOC state in the related art, such as Fig. 9 shown.

[0135] It should be noted that the steps here are similar to those in case 2b. However, in case 2b, UE1 can also apply the public configuration of SL-RB by the network side device according to SIB12, but here UE1 is out of network coverage and cannot obtain SIB12, so it obtains SL-RB related configuration according to the SL pre-configuration message, and the specific steps are not repeated here.

[0136] In the following, in combination with the accompanying drawings, the SL configuration assistance method, the first terminal and the network side device provided in the embodiments of the present application are described in detail through some embodiments and their application scenarios.

[0137] First, the configuration assistance method of the SL corresponding to the first terminal in the RRC connection state is explained.

[0138] Fig.10 is one of the flow charts of the SL configuration assistance method provided in the embodiment of the present application, such as Fig.10 As shown, the SL configuration assistance method is applied to a first terminal, and the method includes step 1001; wherein:

[0139] Step 1001: The first terminal sends SL auxiliary information to a network side device; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, and the SL auxiliary information is used to assist in SL-RB configuration.

[0140] In the related art, under the LTE SL CA framework, the upper layer determines the mapping relationship between the service and the frequency point, and provides the AS layer with the mapping of the Destination L2 ID and the SL frequency.

[0141] However, NR SL CA also needs to consider the mapping relationship between services and frequencies, and different QoS flows within a service may use different SL frequencies. Therefore, the LTE SL CA framework cannot be reused in NR SL CA scenarios.

[0142] Specifically, it can be considered that the NR SL upper layer determines the mapping relationship between services and frequencies, and needs to increase the granularity of PC5 QoS flow, so that the final mapping result given to the AS layer should be the mapping between {Destination L2 ID, QoS flow} and SL frequency.

[0143] On the premise of supporting the mapping between {Destination L2 ID, QoS flow} and SL frequency points, the present application proposes the following technical concept: a certain mechanism needs to be designed to ensure that PC5 QoS flows with different SL frequency points cannot be mapped to the same SL-RB. The number of SL frequency points here can be any positive integer greater than or equal to 1, and the set consisting of the frequency value of at least one SL frequency point is called the SL frequency point set. Therefore, when the number of SL frequency points exceeds 1, the meaning of different SL frequency points is equivalent to that at least one SL frequency point value in the SL frequency point set is different.

[0144] In the embodiment of the present application, the first terminal may be in an RRC connection state (RRC_CONNECTED state). For the SL UE in the RRC_CONNECTED state, the mechanism for the base station to configure the SL wireless bearer in the related technology is: mapping the PC5 QoS flow with the same or similar QoS parameters to the same SL-RB. In the SL CA scenario, if the mechanism in the related technology is not improved, it may cause a conflict between the SL-RB configuration configured by the base station and the upper layer configuration, resulting in the failure of SL CA to work.

[0145] For example, a certain SL-RB configuration configured by the base station is associated with PC5 QoS flow-1, PC5 QoS flow-2 and PC5QoS flow-3. The PC5 QoS flow-1 and PC5 QoS flow-3 provided by the upper layer of the UE to the AS layer are mapped to SL freq-1, and PC5 QoS flow-2 is mapped to SL freq-2. At the same time, the SL frequency selection mechanism is executed at the Medium Access Control (MAC) layer. However, the MAC layer can only distinguish the logical channel level, but not the QoS flow level. That is, different QoS flows submitted to the same logical channel can only be treated equally at the MAC layer. Therefore, the SL frequency selection mechanism of the MAC layer cannot work according to the frequency specified by the upper layer.

[0146] In response to the current problems of the first terminal in the RRC connection state, the embodiment of the present application proposes: through the reporting of SLUE auxiliary information and combined with the base station configuration, ensure that the PC5 QoS flows with different SL frequencies are mapped to different SL-RB configurations. In other words, any PC5 QoS flow associated with the same SL-RB is mapped to the same SL frequency. The final effect under the embodiment of the present application can be, for example: the base station configures SL-RB-1 to associate PC5 QoS flow-1, PC5QoS flow-3 (associated SL freq-1), the base station configures SL-RB-2 to associate PC5 QoS flow-2 (associated SLfreq-2), and the PC5 QoS flows with different SL frequencies are mapped to different SL-RBs, and the PC5 QoSflow with the same SL frequency is mapped to the same SL-RB.

[0147] Specifically, the first terminal can send SL auxiliary information to the network side device to assist in SL-RB configuration; wherein the SL auxiliary information can represent the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, and the network side device can use the mapping relationship represented by the SL auxiliary information to perform SL-RB configuration.

[0148] Optionally, before the first terminal sends the SL auxiliary information to the network side device, the first terminal may receive first configuration information from an upper layer of the first terminal; wherein the first configuration information includes a mapping relationship between the at least one PC5 QoSflow and the at least one SL frequency point;

[0149] The first terminal determines the SL auxiliary information based on the first configuration information;

[0150] The upper layer is a protocol layer above the access layer of the first terminal.

[0151] Specifically, the upper layer may generally refer to the protocol layers above the 3rd Generation Partnership Project (3GPP) AS layer. For example, the upper layer may include: vehicle-to-everything service layer (V2X layer), proximity service layer (Promity Service, ProSe), etc.

[0152] Optionally, the SL auxiliary information may include any one of the following:

[0153] 1) A first mapping relationship between a Destination Layer-2 ID, at least one PC5 QoS flow identifier, and at least one SL frequency point;

[0154] 2) A second mapping relationship between the at least one PC5 QoS flow identifier and the at least one SL frequency point.

[0155] Optionally, the SL auxiliary information may also include at least one of the Destination Layer-2 ID, at least one PC5 QoS flow identifier and at least one SL frequency point, that is, the SL auxiliary information may include any combination of the above at least one item and the first mapping relationship or the second mapping relationship.

[0156] Optionally, the SL auxiliary information can be carried in a SidelinkUEInformationNR message sent by the first terminal to the network side device.

[0157] Optionally, the first mapping relationship may satisfy any one of the following:

[0158] a. Based on the Destination Layer-2 ID and the at least one PC5 QoS flow identifier in the first combination of the PC5 QoS flow identifier, determine at least one SL frequency corresponding to the first combination;

[0159] Specifically, at least one SL frequency point can be uniquely determined by a combination of a Destination Layer-2 ID and a part of the PC5 QoS flow identifier in at least one PC5 QoS flow identifier, that is, the mapping relationship between the Destination Layer-2 ID, the PC5QoS flow identifier and the SL frequency point is 1:N:M; wherein N is greater than or equal to 1, and M is greater than or equal to 1;

[0160] It should be noted that one Destination Layer-2 ID can correspond to multiple PC5 QoS flow identifiers, and the Destination Layer-2 ID and any PC5 QoS flow identifier can be used as the first combination to uniquely determine at least one SL frequency.

[0161] b. Based on a second combination of the Destination Layer-2 ID and some of the SL frequencies in the at least one SL frequency, determine at least one PC5 QoS flow identifier corresponding to the second combination.

[0162] Specifically, at least one PC5 QoS flow identifier can be uniquely determined by a combination of the Destination Layer-2 ID and part of the SL frequencies in at least one SL frequency, that is, the mapping relationship between the Destination Layer-2 ID, PC5 QoS flow identifier and the SL frequency is 1:L:K; wherein L is greater than or equal to 1, and K is greater than or equal to 1.

[0163] It should be noted that one Destination Layer-2 ID can correspond to multiple SL frequencies, and the DestinationLayer-2ID and any SL frequency can be used as the second combination to uniquely identify at least one PC5 QoS flow identifier.

[0164] Optionally, the second mapping relationship may satisfy any one of the following:

[0165] a) determining, based on a third combination of some PC5 QoS flow identifiers in the at least one PC5 QoS flow identifier, at least one SL frequency point corresponding to the third combination;

[0166] b) Based on a fourth combination consisting of some SL frequency points in the at least one SL frequency point, determine at least one PC5 QoS flow identifier corresponding to the fourth combination.

[0167] In an embodiment of the present application, a configuration assistance method for SL adapted to the NR SL CA scenario is provided. Specifically, the first terminal sends SL auxiliary information to the network side device. The above SL auxiliary information represents a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point. Therefore, the network side device can use the mapping relationship represented by the SL auxiliary information to assist in SL-RB configuration, so as to adapt to the granularity of the PC5 QoS flow level of NR SL, that is, a frequency mapping method that can adapt to the PC5QoS flow level is proposed. After using the above mapping relationship to assist in SL-RB configuration, the first terminal can operate according to the frequency point specified by the upper layer protocol of the terminal, so as to realize accurate configuration of the SL wireless bearer in the NR SL CA scenario.

[0168] Optionally, the first terminal may receive first radio bearer configuration information from the network side device;

[0169] The first terminal performs an operation of applying the first wireless bearer configuration information; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0170] Optionally, after the first terminal sends the SL auxiliary information to the network side device, the first terminal may receive the first radio bearer configuration information from the network side device. In some optional implementations, the first radio bearer configuration information may be modified based on the SL auxiliary information, or generated based on the SL auxiliary information.

[0171] In the embodiment of the present application, the application first radio bearer configuration information can be understood to include at least the following two meanings:

[0172] (1) The first terminal considers that the first radio bearer configuration information is valid;

[0173] (2) The first terminal performs an SL-RB configuration operation on the target PC5 QoS flow to be transmitted based on the first radio bearer configuration information.

[0174] The target PC5 Qos flow to be transmitted may be configured by a protocol layer above the access layer of the first terminal, and performing the SL-RB configuration operation may include at least one of: an SL-RB addition operation and an SL-RB modification operation.

[0175] Specifically, after receiving the first wireless bearer configuration information from the network side device, the first terminal may assume that the network side device has determined that the first wireless bearer configuration information meets the requirements, that is, for each SL-RB configuration in the mapping relationship between at least one SL-RB and at least one PC5 QoS flow included in the first wireless bearer configuration information, the SL frequency points of the associated PC5 QoS flow are the same, then the first terminal can directly execute the operation of applying the first wireless bearer configuration information that meets the requirements.

[0176] It should be noted that in order to determine whether the first radio bearer configuration information meets the requirements, it is necessary to determine each SL-RB configuration in the first radio bearer configuration information, that is, to take each SL-RB configuration as a determination unit to determine whether the SL frequencies of the multiple PC5 QoS flows associated with it are the same.

[0177] For example, assuming that in the first radio bearer configuration information, SL-RB 1 is associated with PC5 QoS flow-1 (corresponding to frequencies f1 and f2) and PC5 QoS flow-2 (corresponding to frequencies f1 and f2). For SL-RB 1, since the SL frequencies corresponding to PC5 QoS flow-1 and PC5 QoS flow-2 are the same, it can be considered that SL-RB 1 meets the requirements; assuming that SL-RB 2 in the first radio bearer configuration information is associated with PC5 QoS flow-3 (corresponding to frequencies f1 and f2) and PC5 QoS flow-4 (corresponding to frequency f3), for SL-RB 2, since the SL frequencies corresponding to PC5 QoS flow-3 and PC5 QoS flow-4 are different, it can be considered that SL-RB 2 does not meet the requirements. It should be noted that the frequency information in the first wireless bearer configuration information can be explicitly carried in the first wireless bearer configuration information of the network side device, or it can be implicitly derived by the first terminal in combination with the mapping relationship between at least one PC5 QoS flow configured in the upper layer of the terminal and at least one frequency point. This application does not limit this.

[0178] If all SL-RBs in the first radio bearer configuration information meet the requirements, it can be considered that the first radio bearer configuration information meets the requirements; if there is one SL-RB that does not meet the requirements, it can be considered that the first radio bearer configuration information does not meet the requirements.

[0179] Optionally, the first terminal may receive first radio bearer configuration information from the network side device;

[0180] The first terminal determines a judgment result based on whether the first radio bearer configuration information satisfies a first condition;

[0181] The first terminal performs a corresponding target operation according to the judgment result;

[0182] Among them, the first condition includes: the first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0183] Optionally, after the first terminal sends the SL auxiliary information to the network side device, the first terminal may receive the first radio bearer configuration information from the network side device. In some optional implementations, the first radio bearer configuration information may be modified based on the SL auxiliary information, or generated based on the SL auxiliary information.

[0184] Specifically, after receiving the first wireless bearer configuration information from the network side device, the first terminal can further judge the first wireless bearer configuration information, specifically whether it meets the first condition, that is, for each SL-RB configuration in the mapping relationship between at least one SL-RB included in the first wireless bearer configuration information and at least one PC5 QoS flow, whether the SL frequency points of the associated PC5 QoS flow are the same, and perform the corresponding target operation based on the judgment result.

[0185] Optionally, when the judgment result is that the first radio bearer configuration information satisfies the first condition, the target operation may include: applying the first radio bearer configuration information;

[0186] If the judgment result is that the first radio bearer configuration information does not meet the first condition, the target operation may include at least one of the following operations:

[0187] 1) considering the first radio bearer configuration information invalid;

[0188] 2) considering that the RRC reconfiguration process corresponding to the first radio bearer configuration information has failed;

[0189] 3) Trigger the RRC reestablishment process;

[0190] 4) Sending radio bearer related configuration failure information to the network side device.

[0191] Specifically, if the first terminal determines that the first radio bearer configuration information meets the first condition, the first terminal performs an operation of applying the first radio bearer configuration information.

[0192] If the first terminal determines that the first radio bearer configuration information does not meet the first condition, it can be considered that the first radio bearer configuration information will make it difficult for the first terminal to work according to the frequency specified by the upper layer, and the NR SL CA mechanism will be difficult to work normally. Therefore, the first terminal can consider that the first radio bearer configuration information is invalid, or that the RRC reconfiguration process corresponding to the first radio bearer configuration information has failed. Further, the RRC reconstruction process can be triggered so that the network side device can reconfigure the RRC, and the new first radio bearer configuration information can be re-issued, and the radio bearer related configuration failure information can also be sent to the network side device. Among them, the radio bearer related configuration failure information can also further indicate the failure reason of the radio bearer related configuration, and / or which SL-RB configuration has failed.

[0193] Optionally, the first terminal may consider the first radio bearer configuration information that does not meet the first condition to be invalid by considering that the RRC reconfiguration content carried by the first radio bearer configuration information is not valid.

[0194] Optionally, after determining that the first wireless bearer configuration information does not meet the first condition, the first terminal can trigger the Sidelink UE Information process and report the SL wireless bearer related configuration failure information through the SidelinkUEInformationNR message.

[0195] Optionally, an implementation manner in which the first terminal sends the SL auxiliary information to the network side device may include:

[0196] When determining that the second condition is met, the first terminal sends the SL auxiliary information to the network side device;

[0197] The second condition includes at least one of the following:

[0198] a. The network side device supports SL multi-carrier transmission;

[0199] b. The network side device supports SL CA function;

[0200] c. Compared with the SL auxiliary information sent by the first terminal last time, the mapping relationship has changed.

[0201] d. The at least one PC5 QoS flow is used for SL unicast communication.

[0202] Specifically, the first terminal may send SL auxiliary information to the network side device when determining that the second condition is met, which may be divided into the following three cases:

[0203] Case 1: Before sending SL auxiliary information to the network side device, the first terminal first checks whether the network side device supports SL multi-carrier transmission or SL CA function. If the check result is "yes", the SL auxiliary information is sent to the network side device; if the check result is "no", it can be considered that the network side device does not need to use the SL auxiliary information for SL-RB configuration at this time, so the SL auxiliary information does not need to be sent to the network side device at this time.

[0204] Case 2: Before sending SL auxiliary information to the network side device, the first terminal first checks: if the first terminal has sent SL auxiliary information to the network side device, it determines whether the mapping relationship between at least one PC5 QoS flow represented by the SL auxiliary information and at least one SL frequency point has changed compared with the SL auxiliary information sent last time; if the mapping relationship has not changed, the SL auxiliary information may not be sent first; if the mapping relationship has changed, the SL auxiliary information is sent again.

[0205] Case 3: Before the first terminal sends SL auxiliary information to the network side device, it first checks: If the SL auxiliary information that the first terminal is going to send to the network side device is related to SL unicast communication, the SL auxiliary information is sent to the network side device. If it is not related to SL unicast communication, such as SL broadcast communication or SL multicast communication, it can be considered that the network side device can rely on other methods (such as operation and maintenance (OAM) method, or the core network configures the network side device through the terminal policy) to obtain the mapping relationship between the PC5 QoS flow and the SL frequency point information in advance, without the need to report through the terminal wireless air interface.

[0206] Fig.11 This is the second flow chart of the SL configuration assistance method provided in the embodiment of the present application, such as Fig.11 As shown, the SL configuration assistance method is applied to a network side device, and the method includes steps 1101 and 1102; wherein:

[0207] Step 1101: A network-side device receives SL auxiliary information from a first terminal; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point.

[0208] Step 1102: The network side device sends the first wireless bearer configuration information to the first terminal; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0209] Specifically, the first terminal first sends SL auxiliary information to the network side device, and the SL auxiliary information represents the mapping relationship between at least one PC5QoS flow and at least one SL frequency point. The network side device can determine the first wireless bearer configuration information based on the SL auxiliary information. The first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoSflow. For each SL-RB configuration, the SL frequency point of the associated PC5 QoS flow is the same. The first wireless bearer configuration information is then sent to the first terminal, so that the first terminal performs corresponding terminal behavior based on the first wireless bearer configuration information.

[0210] Optionally, the SL auxiliary information may include any one of the following:

[0211] 1) A first mapping relationship between a Destination Layer-2 ID, at least one PC5 QoS flow identifier, and at least one SL frequency point;

[0212] 2) A second mapping relationship between the at least one PC5 QoS flow identifier and the at least one SL frequency point.

[0213] Optionally, the SL auxiliary information may also include at least one of the Destination Layer-2 ID, at least one PC5 QoS flow identifier and at least one SL frequency point, that is, the SL auxiliary information may include any combination of the above at least one item and the first mapping relationship or the second mapping relationship.

[0214] Optionally, the first mapping relationship may satisfy any one of the following:

[0215] a. Based on the Destination Layer-2 ID and the at least one PC5 QoS flow identifier in the first combination of the PC5 QoS flow identifier, determine at least one SL frequency corresponding to the first combination;

[0216] b. Based on a second combination of the Destination Layer-2 ID and some of the SL frequencies in the at least one SL frequency, determine at least one PC5 QoS flow identifier corresponding to the second combination.

[0217] Optionally, the second mapping relationship may satisfy any one of the following:

[0218] a) determining, based on a third combination of some PC5 QoS flow identifiers in the at least one PC5 QoS flow identifier, at least one SL frequency point corresponding to the third combination;

[0219] b) Based on a fourth combination consisting of some SL frequency points in the at least one SL frequency point, determine at least one PC5 QoS flow identifier corresponding to the fourth combination.

[0220] In an embodiment of the present application, a configuration assistance method for SL adapted to the NR SL CA scenario is provided, and specifically, a network side device receives SL auxiliary information from a first terminal, and the above SL auxiliary information represents a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point. Therefore, the network side device can assist in SL-RB configuration based on the mapping relationship represented by the SL auxiliary information, and specifically send first wireless bearer configuration information to the first terminal. In the first wireless bearer configuration information, the SL frequency points of the PC5 QoS flow associated with each SL wireless bearer SL-RB are the same, ensuring that PC5 QoS flows with different SL frequencies are not mapped to the same SL-RB, and the granularity of the PC5 QoS flow level of the NR SL can be adapted, that is, a frequency mapping method that can adapt to the PC5 QoS flow level is proposed, and then after using the above mapping relationship to assist in SL-RB configuration, the first terminal can work according to the frequency point specified by the upper layer protocol of the terminal, so as to realize accurate configuration of the SL wireless bearer in the NR SL CA scenario.

[0221] Optionally, the implementation manner in which the network side device sends the first radio bearer configuration information to the first terminal may include:

[0222] The network side device determines the first radio bearer configuration information based on the first information;

[0223] The network side device sends the first radio bearer configuration information to the first terminal;

[0224] The first information includes at least one of the following:

[0225] 1) QoS parameter requirements of at least one PC5 QoS flow;

[0226] 2) The mapping relationship represented by the SL auxiliary information.

[0227] For example, for the mechanism in the related technology, PC5 QoS flows with similar QoS parameter requirements will be configured to one SL-RB; PC5 QoS flows with different or large differences in QoS parameter requirements will be configured to different SL-RBs. How to classify the QoS requirements of PC5QoS flows and how many SL-RBs are configured to complete the classification are the implementation of the network side equipment. Assume that the classification according to QoS parameter requirements is as follows:

[0228] Configure PC5 QoS flow-1, PC5 QoS flow-2, and PC5 QoS flow-3 to one SL-RB 1;

[0229] Configure PC5 QoS flow-4 and PC5 QoS flow-5 to one SL-RB 2;

[0230] Configure PC5 QoS flow-6 to a SL-RB 3;

[0231] According to the mechanism in the related technology, three SL-RBs will be configured.

[0232] For the mechanism proposed in this application, in addition to similar QoS, it is also necessary to configure QoS flows with similar QoS but different associated frequencies to different SL-RBs. Assume that the situation according to QoS parameter requirements and frequency classification is as follows:

[0233] Configure PC5 QoS flow-1 (corresponding to frequencies f1 and f2) and PC5 QoS flow-2 (corresponding to frequencies f1 and f2) to one SL-RB 1;

[0234] Configure PC5 QoS flow-3 (corresponding to frequency f3) to one SL-RB 2;

[0235] Configure PC5 QoS flow-4 (corresponding to frequency f3) and PC5 QoS flow-5 (corresponding to frequency f3) to one SL-RB 3;

[0236] Configure PC5 QoS flow-6 (corresponding to frequency f4) to a SL-RB 4;

[0237] According to the mechanism proposed in this application, four SL-RBs will be configured. The main difference from the mechanism in the related art is that although PC5 QoS flow-1, PC5 QoS flow-2 and PC5 QoS flow-3 have similar QoS parameter requirements, they correspond to different frequencies. Therefore, PC5 QoS flow-1 and PC5 QoS flow-2 with the same corresponding frequencies are configured in the same SL-RB, and PC5 QoS flow-3 with different corresponding frequencies is configured in another SL-RB.

[0238] The following describes a configuration assistance method for the SL corresponding to the first terminal, which is in an RRC idle state / inactive state, out of network coverage, etc.

[0239] Fig.12 This is a flowchart of the SL configuration assistance method provided in the embodiment of the present application. Fig.12 As shown, the SL configuration assistance method is applied to the first terminal, and the method includes step 1201 and step 1202; wherein:

[0240] Step 1201: The first terminal obtains second radio bearer configuration information; wherein the second radio bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow;

[0241] Step 1202: The first terminal performs an SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point.

[0242] Specifically, the first terminal can obtain second wireless bearer configuration information, which includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow. The first terminal can also receive first configuration information from an upper layer of the first terminal, which includes a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point. Then, the first terminal can perform SL-RB configuration operations on the target QoS flow to be transmitted based on the mapping relationship included in the second wireless bearer configuration information and the mapping relationship included in the first configuration information.

[0243] It should be noted that, assuming that a certain SL-RB configuration is associated with PC5 QoS flow-1, PC5 QoS flow-2, and PC5 QoS flow-3, and multiple PC5 QoS flows arrive one after another in time, the above-mentioned target QoS flow to be transmitted refers to the QoS flow to be transmitted at the current time.

[0244] In an embodiment of the present application, a configuration assistance method for SL in an NR SL CA scenario is provided. Specifically, the first terminal obtains second wireless bearer configuration information. The second wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow. Therefore, the first terminal can perform SL-RB configuration operations on the target QoS flow to be transmitted based on the second wireless bearer configuration information and the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, so that the granularity of the PC5 QoS flow level of NR SL can be adapted, that is, a frequency mapping method that can adapt to the PC5 QoS flow level is proposed. After using the above-mentioned mapping relationship to assist in performing the SL-RB configuration operation on the target QoS flow to be transmitted, the first terminal can work according to the frequency point specified by the upper layer to achieve accurate configuration of the SL wireless bearer in the NR SL CA scenario.

[0245] Optionally, the first terminal may implement the SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, which may include:

[0246] The first terminal performs an SL-RB adding operation when determining that the target QoS flow satisfies a third condition based on the second radio bearer configuration information and a mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point;

[0247] The third condition includes any one of the following:

[0248] 1) The SL-RB mapped to the target QoS flow has not been established;

[0249] 2) The SL-RB mapped by the target QoS flow has been established, and the SL frequency point set mapped by the target QoS flow is different from the SL frequency point set mapped by the established target SL-RB.

[0250] Specifically, when the first terminal determines that the target QoS flow satisfies the third condition based on the second radio bearer configuration information and the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, if the SL-RB mapped by the target QoS flow has not been established, or the SL-RB mapped by the target QoS flow has been established, but the set of SL frequencies mapped by the target QoS flow is different from the set of SL frequencies mapped by the established target SL-RB, then an SL-RB addition operation can be performed.

[0251] For example, according to the requirements of the upper layer configuration of the first terminal, PC5 QoS flow-1 is mapped to SL freq-1 and SL freq-2; PC5 QoS flow-2 is mapped to SL freq-1 and SL freq-2; PC5 QoS flow-3 is mapped to SLfreq-3. Assuming that PC5 QoS flow-1, PC5 QoS flow-2, and PC5 QoS flow-3 arrive successively in time, for the PC5 QoS flow-1 that arrives first, if the SL-RB mapped by PC5 QoS flow-1 has not been established, the SL-RB adding operation can be performed; for the PC5 QoS flow-2 that arrives next, since the SLfreq-1 and SL freq-2 mapped by PC5 QoS flow-2 are the same as the frequency points mapped by PC5 QoS flow-1, there is no need to perform the SL-RB adding operation on it, that is, there is no need to add a new SL-RB corresponding to PC5 QoS flow-2; for the PC5 QoS flow-3 that arrives next, since the SLfreq-1 and SL freq-2 mapped by PC5 QoS flow-2 are the same as the frequency points mapped by PC5 QoS flow-1, there is no need to perform the SL-RB adding operation on it, that is, there is no need to add a new SL-RB corresponding to PC5 QoS flow-2; freq-3 is different from the frequency mapped by PC5 QoS flow-1 and PC5 QoS flow-2, and does not belong to the subset of the SL frequency set mapped by the established target SL-RB. Therefore, the SL-RB addition operation can be performed on PC5 QoS flow-3 to establish a new SL-RB corresponding to PC5 QoS flow-3.

[0252] The following example illustrates that the set of SL frequencies mapped to the target QoS flow is different from the set of SL frequencies mapped to the established target SL-RB:

[0253] Example 1: PC5 QoS flow-1 (mapping frequency set f1, f2), target PC5 QoS flow-2 (mapping frequency set f1), this subset situation can be understood as 'different';

[0254] Or, for example 2: PC5 QoS flow-1 (mapping frequency point set f1, f2), target PC5 QoS flow-2 (mapping frequency point set f3), this completely disjoint situation can also be understood as 'different'.

[0255] It should be noted that for "performing the SL-RB addition operation": if it is the first case (the SL-RB mapped to the target QoS flow has not been established), it means: establishing a new SL-RB, and mapping the target QoS flow to this new SL-SRB for transmission. If it is the second case (the SL-RB mapped to the target QoS flow has been established): it means: establishing a new SL-RB, and this new SL-RB is different from the established target SL-SRB, and mapping the target QoS flow to this new SL-SRB for transmission.

[0256] Optionally, if the first terminal communicates with the second terminal via SL unicast, the first terminal may send a first message to the second terminal when the target QoS flow satisfies the third condition, and the first message carries first indication information for indicating the execution of an SL-RB adding operation.

[0257] Specifically, if the first terminal communicates with the second terminal via SL unicast, the first terminal can send a first message to the second terminal when the target QoS flow meets the third condition, that is, when an addition operation needs to be performed on the target QoS flow. The first message carries first indication information for indicating the execution of the SL-RB addition operation, so as to instruct the second terminal to perform the relevant operation.

[0258] Optionally, the first message may be an RRCReconfigurationSidelink message.

[0259] If the first terminal communicates with the second terminal through SL multicast or broadcast, the first terminal does not need to send the first message to the second terminal.

[0260] Optionally, the first terminal may implement the SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, which may include:

[0261] The first terminal performs a modification operation of the SL-RB when it is determined that the target QoS flow satisfies the fourth condition based on the second radio bearer configuration information and the mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point;

[0262] Among them, the fourth condition includes: the SL-RB mapped by the target QoS flow has been established, and the SL frequency point set mapped by the target QoS flow is the same as the SL frequency point set mapped by the established target SL-RB.

[0263] Specifically, when the first terminal determines that the target QoS flow meets the fourth condition based on the second radio bearer configuration information and the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, if the SL-RB mapped by the target QoS flow has been established, and the SL frequency point set mapped by the target QoS flow is the same as the SL frequency point set mapped by the established target SL-RB, then a modification operation of the SL-RB can be performed.

[0264] For example, assuming that PC5 QoS flow-1 and PC5 QoS flow-2 arrive one after another in time, PC5 QoS flow-1 is mapped to SL freq-1 and SL freq-2; PC5 QoS flow-2 is mapped to SL freq-1 and SL freq-2; for PC5 QoS flow-1 that arrives first, if the SL-RB mapped by PC5 QoS flow-1 has not been established, the SL-RB addition operation can be performed; for PC5 QoS flow-2 that arrives next, since the SLfreq-1 and SL freq-2 mapped by PC5 QoS flow-2 are the same as the frequency mapped by PC5 QoS flow-1, the SL-RB corresponding to PC5 QoS flow-1 can be modified to map PC5 QoS flow-2 to the SL-RB corresponding to PC5 QoS flow-1.

[0265] The following example is used to illustrate that the SL frequency set mapped by the target QoS flow is the same as the SL frequency set mapped by the established target SL-RB: PC5 QoS flow-1 (mapping frequency set f1, f2), target PC5 QoS flow-2 (mapping frequency set f1, f2). The situation where all the set elements are the same can be understood as 'the same'.

[0266] It should be noted that "performing SL-RB modification operations" specifically means: not establishing a new SL-RB, but mapping the target QoS flow to the established target SL-SRB for transmission.

[0267] Optionally, if the first terminal communicates with the second terminal via SL unicast, then when the target QoSflow satisfies the fourth condition, the first terminal may send a second message to the second terminal, wherein the second message carries second indication information for indicating the execution of the SL-RB modification operation.

[0268] Specifically, if the first terminal communicates with the second terminal via SL unicast, the first terminal can send a second message to the second terminal when the target QoS flow meets the fourth condition, that is, when it is necessary to perform a modification operation on the target QoS flow, and the second message carries second indication information for indicating the execution of the SL-RB modification operation to instruct the second terminal to perform related operations.

[0269] Optionally, the second message may be an RRCReconfigurationSidelink message.

[0270] If the first terminal communicates with the second terminal through SL multicast or broadcast, the first terminal does not need to send the second message to the second terminal.

[0271] Optionally, the first terminal may receive second configuration information from an upper layer of the first terminal;

[0272] The upper layer is a protocol layer above the access layer of the first terminal, and the second configuration information includes at least one of the following:

[0273] a mapping relationship between the at least one PC5 QoS flow and at least one SL frequency;

[0274] b. The target QoS flow to be transmitted.

[0275] Optionally, the implementation manner in which the first terminal obtains the second radio bearer configuration information may include:

[0276] When the first terminal is in an RRC idle state or an RRC inactive state, receiving a SIB message from a network side device, where the SIB message includes the second radio bearer configuration information;

[0277] When the first terminal is out of network coverage, the second radio bearer configuration information is obtained through an SL pre-configuration message.

[0278] Specifically, when the first terminal is in an RRC idle state or an RRC inactive state, the first terminal may obtain the second radio bearer configuration information by receiving a SIB message from a network side device.

[0279] When the first terminal is out of network coverage, the first terminal cannot obtain the second radio bearer configuration information through the network side device, so the first terminal can obtain the second radio bearer configuration information through the SL pre-configuration message.

[0280] Optionally, the second radio bearer configuration information further includes packet data convergence protocol (Packet Data Convergence Protocol, PDCP) replication enabling configuration information corresponding to some or all SL signaling radio bearers (SL-signalling radio bearer, SL-SRB) in the at least one SL-RB;

[0281] In the case of determining to perform the SL-RB adding operation, if the number of SL frequency points associated with the first SL-RB to be established is less than the first preset threshold value, the first terminal ignores the PDCP copy enabling configuration information corresponding to the first SL-RB;

[0282] When determining to perform the SL-RB modification operation, if the number of SL frequency points associated with the second SL-RB after the SL-RB modification operation is performed is less than the second preset threshold value, the first terminal ignores the PDCP copy enable configuration information corresponding to the second SL-RB.

[0283] It should be noted that the first terminal ignores the PDCP replication enabling configuration information corresponding to the first SL-RB, which can be understood as not performing PDCP replication operation or deactivating PDCP replication for the first SL-RB.

[0284] It should be noted that the first preset threshold value and the second preset threshold value can be a fixed value agreed upon based on network configuration, SL pre-configuration or protocol, and the first preset threshold value and the second preset threshold value can be the same or different.

[0285] For example, assuming that the preset threshold value = 2, the number of SL frequency points = 1, then the ignore operation is performed. If the SLPDCP duplication function transmission uses more than two legs (more than two RLC) in the future, the above situation may be applicable.

[0286] For another example, assuming that the preset threshold value = 3, and the number of SL frequency points = 1 or 2, the ignore operation is performed.

[0287] In some embodiments, when it is determined to perform the SL-RB addition operation, the operation corresponding to the copy enable configuration can only be performed when the SL-RB is associated with multiple SL frequency points. Therefore, if the number of SL frequency points associated with the first SL-RB to be established is 1 (one and only one), the first terminal can ignore the PDCP copy enable configuration information corresponding to the first SL-RB. Among them, the SL frequency point associated with the first SL-RB to be established is determined by the SL frequency point mapped by the PC5 QoS flow.

[0288] Similarly, in some embodiments, when it is determined to perform a modification operation of the SL-RB, if the number of SL frequencies associated with the second SL-RB after the modification operation of the SL-RB is 1, the first terminal ignores the PDCP replication enable configuration information corresponding to the second SL-RB. The SL frequency associated with the second SL DR after the modification operation of the SL-RB is determined jointly by the SL frequency mapped to the PC5 QoS flow before the modification operation of the SL-RB is performed and the SL frequency mapped to at least one PC5 QoS flow on the second SL-RB when the modification operation of the SL-RB is performed.

[0289] Fig.13 is a signaling interaction diagram of the SL configuration assistance method provided in an embodiment of the present application, such as Fig.13 As shown, it includes step 1301 and step 1302; wherein:

[0290] Step 1301: The first terminal sends SL auxiliary information to a network side device.

[0291] The SL auxiliary information represents a mapping relationship between at least one PC5 quality of service flow QoS flow and at least one SL frequency point, and the SL auxiliary information is used to assist in the configuration of the SL radio bearer SL-RB.

[0292] Step 1302: The network side device sends first radio bearer configuration information to the first terminal.

[0293] Among them, the first radio bearer configuration information includes a mapping relationship between at least one SL radio bearer SL-RB and at least one PC5QoS flow, and the SL frequency of the PC5 QoS flow associated with each SL-RB configuration is the same.

[0294] The following example illustrates the SL configuration assistance method provided in the embodiment of the present application.

[0295] Embodiment 1: The transmitting end (UE1) is in the RRC connected state, and the relevant configuration of SL-RB comes from the configuration of the network side device dedicated message RRCReconfiguration.

[0296] The main idea of ​​the embodiment of the present application is: through SL auxiliary information reporting + base station configuration, ensure that PC5 QoS flows with different SL frequencies are mapped to different SL-RB configurations. The final effect is, for example: the base station configures SL-RB-1 to associate PC5 QoS flow-1 (associated SL freq-1), and the base station configures SL-RB-2 to associate PC5 QoS flow-2 (associated SLfreq-2).

[0297] The specific steps are as follows:

[0298] Step 1-0, the sending end (UE1) is in the RRC connected state, and UE1 will perform NR SL communication or NRSL discovery process with the other UE (UE2).

[0299] Step 1-1, UE1 sends a SidelinkUEInformationNR message to a network side device (e.g., a serving base station), and the SidelinkUEInformationNR message includes: UE2's Destination Layer-2 ID, at least one PC5 QoS flow identifier (PC5-QoS-FlowIdentity), and at least one SL frequency point. There is a mapping relationship between the Destination Layer-2 ID, at least one PC5 QoS flow identifier, and at least one SL frequency point.

[0300] Optionally, the mapping relationship between the above three can be implemented in any of the following ways:

[0301] Method 1: Based on the combination of Destination Layer-2 ID and PC5 QoS flow identifier, at least one SL frequency is uniquely determined; that is, the mapping relationship between Destination Layer-2 ID, PC5 QoS flow identifier and SL frequency is 1:1:M (M is greater than or equal to 1).

[0302] Method 2: Based on the combination of Destination Layer-2 ID and SL frequency, uniquely determine at least one PC5QoS flow identifier; that is, the mapping relationship between Destination Layer-2 ID, PC5 QoS flow identifier and SL frequency is 1:M:1 (M is greater than or equal to 1).

[0303] Step 1-2: UE1 receives an RRCReconfiguration message sent by a serving base station, where the RRCReconfiguration message includes at least one SL-RB related configuration.

[0304] Among them, at least one SL-RB related configuration meets or does not meet the following requirement: the SL frequency points of the PC5 QoS flow associated with each SL-RB in the SL-RB related configuration are the same.

[0305] Step 1-3, UE1 checks the content of the RRCReconfiguration message sent by the serving base station and performs corresponding terminal actions.

[0306] Specifically, if the configuration of the serving base station can meet the above requirements, UE1 applies the content of the RRCReconfiguration message.

[0307] If the configuration of the serving base station does not meet the above requirements, UE1 triggers any of the following actions:

[0308] 1) UE1 considers that the RRC reconfiguration content is invalid or the RRC reconfiguration process fails; further, the RRC reconstruction process may be triggered.

[0309] 2) UE1 triggers the Sidelink UE Information process and reports the SL radio bearer related configuration failure information through the SidelinkUEInformationNR message.

[0310] Embodiment 2: for SL UE in RRC ILDE or RRC INACTIVE state.

[0311] Core idea: For SL UE in RRC ILDE or RRC INACTIVE state, the radio bearer configuration of SL UE refers to the SIB configuration. This application introduces additional SL UE-side behavior specifications, and triggers the establishment of additional SL radio bearers in the behavior of establishing SL radio bearers, for example, when PC5 QoS flow is mapped to different SL frequencies. The final effect achieved is, for example: for the SL-RB configuration in the SIB, a certain SL-RB configuration is associated with PC5 QoS flow-1, PC5 QoS flow-2, and PC5 QoS flow-3, which arrive one after another in time. And according to the requirements of the upper-layer configuration of the SL UE, PC5 QoS flow-1 is mapped to SL freq-1 and SL freq-2; PC5 QoS flow-2 is mapped to SL freq-1 and SL freq-2; PC5 QoSflow-3 is mapped to SL freq-3.

[0312] Each time a new PC5 QoS flow arrives, the UE needs to determine the SL frequency associated with it, so as to decide whether to perform an SL-RB addition operation or a modification operation. According to the above example, when PC5 QoS flow-1 arrives, an SL-RB addition operation is performed; when PC5 QoS flow-2 arrives, because the SL frequency associated with PC5 QoS flow-2 and PC5 QoS flow-1 is the same, an SL-RB modification operation is performed on the SL-RB corresponding to PC5 QoS flow1; when PC5 QoS flow3 arrives, because the SL frequency associated with PC5 QoSflow3 is different from the SL frequency associated with PC5 QoS flow-2 and PC5 QoS flow-1, an SL-RB addition operation is performed at this time.

[0313] The specific steps are as follows:

[0314] Step 2-0, the sending end (UE1) is in the RRC idle state or the RRC inactive state, and UE1 will perform NR SL communication or NR SL discovery process with the other UE (UE2).

[0315] Step 2-1, UE1 receives a SIB message sent by a serving base station, the SIB message includes at least one SL-RB related configuration. Each SL-RB configuration includes a mapping relationship between an SL-RB configuration index and at least one PC5 QoS flow.

[0316] Step 2-2, (for SL multicast or broadcast): A PC5 QoS flow from the upper layer of UE1 reaches the AS layer of UE1, triggering an SL-RB addition operation or triggering an SL-RB modification operation.

[0317] According to the SL-RB configuration of the SIB message, if UE1 determines that any of the following conditions is met, UE1 triggers the SL-RB addition operation:

[0318] 1) If the bearer SL-RB mapped by PC5 QoS flow is not established;

[0319] 2) If the SL-RB mapped by the PC5 QoS flow has been established, but the SL frequency mapped by the PC5 QoS flow is different from the SL frequency associated with the established SL-RB. The SL frequency associated with the established SL-RB is determined by the SL frequency mapped by at least one PC5 QoS flow established on the SL-RB.

[0320] UE1 triggers the SL-RB modification operation if it determines that the following conditions are met based on the SL-RB configuration of the SIB message: If the SL-RB mapped by the PC5 QoS flow is established, and the SL frequency mapped by the PC5 QoS flow is the same as the SL frequency of the established SL-RB. The SL frequency associated with the established SL-RB is determined by the SL frequency mapped by at least one PC5 QoS flow established on the SL-RB.

[0321] Optionally, under the premise of performing the SL-RB adding operation, if it is judged that the following conditions are met, the duplication enable operation in the SL-RB configuration is ignored: if there is one and only one SL frequency associated with the SL-RB to be established, the SL frequency associated with the SL-RB to be established is determined by the SL frequency mapped by the PC5 QoS flow.

[0322] Optionally, under the premise of performing the SL-RB modification operation, if it is determined that the following conditions are met, the duplication enable operation in the SL-RB configuration is ignored: if there is one and only one SL frequency associated with the SL-RB after the SL-RB modification operation is performed. Among them, the SL frequency associated with the SL-RB on which the SL-RB modification operation is performed is determined jointly by the SL frequency mapped to the PC5 QoS flow of the SL-RB before the SL-RB modification operation is performed and the SL frequency mapped to at least one PC5 QoS flow on the SL-RB during the SL-RB modification operation.

[0323] Step 2-3, (for SL unicast): UE1's operation is the same as step 2-2; in addition, UE1 sends an RRCReconfigurationSidelink message to UE2, and the RRCReconfigurationSidelink message carries the SL-RB establishment or modification operation indication corresponding to the PC5 QoS flow.

[0324] The SL-RB add operation indication corresponding to the PC5 QoS flow is carried when the following conditions are met:

[0325] 1) If the SL-RB mapped by PC5 QoS flow is not established;

[0326] 2) If the SL-RB mapped by the PC5 QoS flow has been established, and the SL frequency mapped by the PC5 QoS flow is different from the SL frequency associated with the established SL-RB. The SL frequency associated with the established SL-RB is determined by the SL frequency mapped by at least one PC5 QoS flow established on the SL-RB.

[0327] The SL-RB operation indication corresponding to the PC5 QoS flow is carried under the following conditions:

[0328] If the SL-RB mapped by the PC5 QoS flow is established, and the SL frequency mapped by the PC5 QoS flow is the same as the SL frequency of the established SL-RB, the SL frequency associated with the established SL-RB is determined by the SL frequency mapped by at least one PC5 QoS flow established on the SL-RB.

[0329] Embodiment 3: Targeting SL UE in the out-of-network coverage state.

[0330] If the transmitting end (UE1) is out of network coverage, the SIB message in Example 2 is replaced with a SidelinkPreconfigNR (SL pre-configuration) message, and other steps and contents may be the same as those in Example 2.

[0331] In an embodiment of the present application, for SL UE in RRC connected state, SL UE auxiliary information reporting + base station configuration is used to ensure that "PC5 QoS flows with different SL frequencies are mapped to different SL-RB configurations". For SL UE in RRC_IDLE, RRC_INACTIVE or OOC state, additional SL UE-side behavior specifications are introduced. In the behavior of SL-RB establishment, when the PC5 QoS flow is mapped to different SL frequencies, the establishment of additional SL wireless bearers is triggered. This ensures that PC5 QoS flows with different SL frequencies are mapped to different SL-RB configurations. The frequency mapping rules with the granularity of the PC5 QoS flow level of NR SL are adapted from the SL-RB configuration on the network side and the SL-RB establishment behavior on the UE side, thereby supporting the normal operation of the NR SL CA mechanism, mainly protecting the potential impact of the Uu air interface wireless bearer configuration and establishment process.

[0332] The SL configuration assistance method provided in the embodiment of the present application can be executed by a SL configuration assistance device. In the embodiment of the present application, the SL configuration assistance device executing the SL configuration assistance method is taken as an example to illustrate the SL configuration assistance device provided in the embodiment of the present application.

[0333] Fig.14 is one of the structural diagrams of the SL configuration auxiliary device provided in the embodiment of the present application, such as Fig.14 As shown, the SL configuration auxiliary device 1400 includes:

[0334] The first sending module 1401 is used to send SL auxiliary information to the network side device; wherein the SL auxiliary information represents the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, and the SL auxiliary information is used to assist in SL-RB configuration.

[0335] In an embodiment of the present application, a configuration assistance device for SL adapted to the NR SL CA scenario is provided. Specifically, a first sending module of the first terminal sends SL auxiliary information to a network side device. The above SL auxiliary information represents a mapping relationship between at least one PC5QoS flow and at least one SL frequency point. Therefore, the network side device can use the mapping relationship represented by the SL auxiliary information to assist in SL-RB configuration, so as to adapt to the granularity of the PC5 QoS flow level of NR SL, that is, a frequency mapping method that can adapt to the PC5 QoS flow level is proposed. After using the above mapping relationship to assist in SL-RB configuration, the first terminal can operate according to the frequency point specified by the upper layer protocol of the terminal, so as to realize accurate configuration of the SL wireless bearer in the NR SL CA scenario.

[0336] Optionally, the SL configuration auxiliary device 1400 further includes:

[0337] The second processing module is used for:

[0338] Receiving first radio bearer configuration information from the network side device;

[0339] Execute the operation of applying the first wireless bearer configuration information; wherein, the first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0340] Optionally, the second processing module is further used for:

[0341] Receiving first radio bearer configuration information from the network side device;

[0342] Determine a judgment result based on whether the first radio bearer configuration information satisfies a first condition;

[0343] According to the judgment result, executing the corresponding target operation;

[0344] Among them, the first condition includes: the first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0345] Optionally, when the judgment result is that the first radio bearer configuration information satisfies the first condition, the target operation may include: applying the first radio bearer configuration information;

[0346] If the judgment result is that the first radio bearer configuration information does not meet the first condition, the target operation may include at least one of the following operations:

[0347] 1) considering the first radio bearer configuration information invalid;

[0348] 2) considering that the radio resource control RRC reconfiguration process corresponding to the first radio bearer configuration information fails;

[0349] 3) Trigger the RRC reestablishment process;

[0350] 4) Sending radio bearer related configuration failure information to the network side device.

[0351] Optionally, the first sending module 1401 is specifically configured to: when it is determined that the second condition is met, send the SL auxiliary information to the network side device;

[0352] The second condition includes at least one of the following:

[0353] a. The network side device supports SL multi-carrier transmission;

[0354] b. The network side device supports SL CA function;

[0355] c. Compared with the SL auxiliary information sent by the first terminal last time, the mapping relationship has changed.

[0356] d. The at least one PC5 QoS flow is used for SL unicast communication.

[0357] Optionally, the second processing module is further used for:

[0358] Receiving first configuration information from an upper layer of the first terminal; wherein the first configuration information includes a mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point;

[0359] Determine the SL auxiliary information based on the first configuration information;

[0360] The upper layer is a protocol layer above the access layer of the first terminal.

[0361] Optionally, the SL auxiliary information may include any one of the following:

[0362] 1) a first mapping relationship between the Destination Layer-2 ID, the at least one PC5 QoS flow identifier, and the at least one SL frequency point;

[0363] 2) A second mapping relationship between the at least one PC5 QoS flow identifier and the at least one SL frequency point.

[0364] Optionally, the first mapping relationship may satisfy any one of the following:

[0365] a. Based on the Destination Layer-2 ID and the at least one PC5 QoS flow identifier in the first combination of the PC5 QoS flow identifier, determine at least one SL frequency corresponding to the first combination;

[0366] b. Based on a second combination of the Destination Layer-2 ID and some of the SL frequencies in the at least one SL frequency, determine at least one PC5 QoS flow identifier corresponding to the second combination.

[0367] Optionally, the second mapping relationship may satisfy any one of the following:

[0368] a) determining, based on a third combination of some PC5 QoS flow identifiers in the at least one PC5 QoS flow identifier, at least one SL frequency point corresponding to the third combination;

[0369] b) Based on a fourth combination consisting of some SL frequency points in the at least one SL frequency point, determine at least one PC5 QoS flow identifier corresponding to the fourth combination.

[0370] Fig.15 This is a second structural diagram of the SL configuration auxiliary device provided in the embodiment of the present application, such as Fig.15 As shown, the SL configuration auxiliary device 1500 includes:

[0371] The receiving module 1501 is configured to receive SL auxiliary information from the first terminal; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 quality of service flow QoS flow and at least one SL frequency point;

[0372] The second sending module 1502 is used to send the first wireless bearer configuration information to the first terminal; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL wireless bearer SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

[0373] In an embodiment of the present application, a configuration assistance device for SL adapted to the NR SL CA scenario is provided, and specifically, a receiving module of a network side device receives SL auxiliary information from a first terminal, and the above-mentioned SL auxiliary information represents a mapping relationship between at least one PC5QoS flow and at least one SL frequency point. Therefore, a second sending module of the network side device can assist in SL-RB configuration based on the mapping relationship represented by the SL auxiliary information, and specifically send first wireless bearer configuration information to the first terminal, and the first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same, ensuring that PC5 QoS flows with different SL frequencies are not mapped to the same SL-RB, and can adapt to the granularity of the PC5 QoS flow level of the NR SL, that is, a frequency mapping method that can adapt to the PC5 QoS flow level is proposed, and then after using the above-mentioned mapping relationship to assist in SL-RB configuration, the first terminal can work according to the frequency point specified by the upper layer protocol of the terminal, so as to realize accurate configuration of the SL wireless bearer in the NR SL CA scenario.

[0374] Optionally, the SL auxiliary information may include any one of the following:

[0375] 1) a first mapping relationship between the Destination Layer-2 ID, the at least one PC5 QoS flow identifier, and the at least one SL frequency point;

[0376] 2) A second mapping relationship between the at least one PC5 QoS flow identifier and the at least one SL frequency point.

[0377] Optionally, the first mapping relationship may satisfy any one of the following:

[0378] a. Based on the Destination Layer-2 ID and the at least one PC5 QoS flow identifier in the first combination of the PC5 QoS flow identifier, determine at least one SL frequency corresponding to the first combination;

[0379] b. Based on a second combination of the Destination Layer-2 ID and some of the SL frequencies in the at least one SL frequency, determine at least one PC5 QoS flow identifier corresponding to the second combination.

[0380] Optionally, the second mapping relationship may satisfy any one of the following:

[0381] a) determining, based on a third combination of some PC5 QoS flow identifiers in the at least one PC5 QoS flow identifier, at least one SL frequency point corresponding to the third combination;

[0382] b) Based on a fourth combination consisting of some SL frequency points in the at least one SL frequency point, determine at least one PC5 QoS flow identifier corresponding to the fourth combination.

[0383] Optionally, the second sending module 1502 is specifically configured to:

[0384] Determine the first radio bearer configuration information based on the first information;

[0385] Sending the first radio bearer configuration information to the first terminal;

[0386] The first information includes at least one of the following:

[0387] 1) QoS parameter requirements of at least one PC5 QoS flow;

[0388] 2) The mapping relationship represented by the SL auxiliary information.

[0389] Fig.16 This is the third structural diagram of the SL configuration auxiliary device provided in the embodiment of the present application, such as Fig.16 As shown, the SL configuration auxiliary device 1600 includes:

[0390] The acquisition module 1601 is used to acquire second radio bearer configuration information; wherein the second radio bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow;

[0391] The first processing module 1602 is used to perform SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point.

[0392] In an embodiment of the present application, a configuration assistance device for SL in an NR SL CA scenario is provided. Specifically, an acquisition module of the first terminal acquires second wireless bearer configuration information. The second wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow. Therefore, the first processing module of the first terminal can perform SL-RB configuration operations on the target QoS flow to be transmitted based on the second wireless bearer configuration information and the mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, so that the granularity of the PC5 QoS flow level of NR SL can be adapted, that is, a frequency mapping method that can adapt to the PC5 QoS flow level is proposed. After using the above-mentioned mapping relationship to assist in performing the SL-RB configuration operation on the target QoS flow to be transmitted, the first terminal can operate according to the frequency point specified by the upper layer protocol of the terminal, so as to realize accurate configuration of the SL wireless bearer in the NR SL CA scenario.

[0393] Optionally, the first processing module 1602 is specifically configured to: when it is determined that the target QoS flow satisfies the third condition based on the second radio bearer configuration information and the mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point, perform an SL-RB adding operation;

[0394] The third condition includes any one of the following:

[0395] 1) The SL-RB mapped to the target QoS flow has not been established;

[0396] 2) The SL-RB mapped by the target QoS flow has been established, and the SL frequency point set mapped by the target QoS flow is different from the SL frequency point set mapped by the established target SL-RB.

[0397] Optionally, the first processing module 1602 is also used to: when the target QoS flow satisfies the third condition, send a first message to the second terminal, the first message carrying first indication information for indicating the execution of the SL-RB adding operation; wherein the first terminal and the second terminal communicate via SL unicast.

[0398] Optionally, the first processing module 1602 is further specifically configured to: when it is determined that the target QoS flow satisfies the fourth condition based on the second radio bearer configuration information and the mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point, perform a modification operation of the SL-RB;

[0399] Among them, the fourth condition includes: the SL-RB mapped by the target QoS flow has been established, and the SL frequency point set mapped by the target QoS flow is the same as the SL frequency point set mapped by the established target SL-RB.

[0400] Optionally, the first processing module 1602 is further used to: when the target QoS flow meets the fourth condition, send a second message to the second terminal, where the second message carries second indication information for indicating to perform a modification operation of the SL-RB;

[0401] The first terminal and the second terminal communicate with each other via SL unicast.

[0402] Optionally, the first processing module 1602 is further configured to: receive second configuration information from an upper layer of the first terminal;

[0403] The upper layer is a protocol layer above the access layer of the first terminal, and the second configuration information includes at least one of the following:

[0404] a mapping relationship between the at least one PC5 QoS flow and at least one SL frequency;

[0405] b. The target QoS flow to be transmitted.

[0406] Optionally, the acquisition module 1601 is specifically used for:

[0407] When the first terminal is in an RRC idle state or an RRC inactive state, receiving a system information block SIB message from a network side device, where the SIB message includes the second radio bearer configuration information;

[0408] When the first terminal is out of network coverage, the second radio bearer configuration information is obtained through an SL pre-configuration message.

[0409] Optionally, the second radio bearer configuration information further includes PDCP copy enabling configuration information corresponding to some or all SL-SRBs in the at least one SL-RB;

[0410] The first processing module 1602 is further configured to:

[0411] In the case of determining to perform the SL-RB adding operation, if the number of SL frequency points associated with the first SL-RB to be established is less than the first preset threshold value, the first terminal ignores the PDCP copy enabling configuration information corresponding to the first SL-RB;

[0412] When determining to perform the SL-RB modification operation, if the number of SL frequency points associated with the second SL-RB after the SL-RB modification operation is performed is less than the second preset threshold value, the first terminal ignores the PDCP copy enable configuration information corresponding to the second SL-RB.

[0413] The configuration auxiliary device of the SL in the embodiment of the present application may 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 may be a terminal, or may be other devices other than a terminal. Exemplarily, the terminal may include but is not limited to the types of the terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0414] The SL configuration auxiliary device provided in the embodiment of the present application can achieve Figures 10 to 13 The various processes implemented by the method embodiment and achieving the same technical effect are not described here to avoid repetition.

[0415] Fig.17 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application, such as Fig.17 As shown, the embodiment of the present application also provides a communication device 1700, including a processor 1701 and a memory 1702, and the memory 1702 stores a program or instruction that can be run on the processor 1701. For example, when the communication device 1700 is a first terminal, the program or instruction is executed by the processor 1701 to implement the various steps of the configuration assistance method embodiment of the first terminal side SL, and can achieve the same technical effect. When the communication device 1700 is a network side device, the program or instruction is executed by the processor 1701 to implement the various steps of the configuration assistance method embodiment of the network side SL, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0416] The embodiment of the present application also provides a first terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Fig.10 or Fig.12 The steps in the method embodiment shown. The first terminal embodiment corresponds to the first terminal side method embodiment described above, and each implementation process and implementation method of the above method embodiment can be applied to the first terminal embodiment and can achieve the same technical effect. Specifically, Fig.18 It is a schematic diagram of the hardware structure of a first terminal implementing an embodiment of the present application.

[0417] The first terminal 1800 includes but is not limited to: a radio frequency unit 1801, a network module 1802, an audio output unit 1803, an input unit 1804, a sensor 1805, a display unit 1806, a user input unit 1807, an interface unit 1808, a memory 1809 and at least some of the components of the processor 1810.

[0418] Those skilled in the art will appreciate that the first terminal 1800 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1810 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.18 The terminal structure shown in the figure does not constitute a limitation on the first terminal. The first terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0419] It should be understood that in the embodiment of the present application, the input unit 1804 may include a graphics processing unit (GPU) 18041 and a microphone 18042, and the graphics processing unit 18041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1806 may include a display panel 18061, and the display panel 18061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1807 includes a touch panel 18071 and at least one of other input devices 18072. The touch panel 18071 is also called a touch screen. The touch panel 18071 may include two parts: a touch detection device and a touch controller. Other input devices 18072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control button, a switch button, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0420] In the embodiment of the present application, after receiving downlink data from the network side device, the RF unit 1801 can transmit the data to the processor 1810 for processing; in addition, the RF unit 1801 can send uplink data to the network side device. Generally, the RF unit 1801 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0421] The memory 1809 can be used to store software programs or instructions and various data. The memory 1809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1809 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1809 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0422] The processor 1810 may include one or more processing units; optionally, the processor 1810 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1810.

[0423] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment on the first terminal side mentioned above, and achieve the same or corresponding technical effect. To avoid repetition, it will not be repeated here.

[0424] The embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the following Fig.11The steps of the method embodiment shown. This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation mode of the above method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0425] Specifically, an embodiment of the present application also provides a network side device. Fig.19 is a schematic diagram of the structure of the network side device provided in the embodiment of the present application, such as Fig.19 As shown, the network side device 1900 includes: an antenna 1901, a radio frequency device 1902, a baseband device 1903, a processor 1904 and a memory 1905. The antenna 1901 is connected to the radio frequency device 1902. In the uplink direction, the radio frequency device 1902 receives information through the antenna 1901 and sends the received information to the baseband device 1903 for processing. In the downlink direction, the baseband device 1903 processes the information to be sent and sends it to the radio frequency device 1902. The radio frequency device 1902 processes the received information and sends it out through the antenna 1901.

[0426] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1903, which includes a baseband processor.

[0427] The baseband device 1903 may include, for example, at least one baseband board on which a plurality of chips are arranged. Fig.19 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 1905 through a bus interface to call the program in the memory 1905 to execute the network device operations shown in the above method embodiment.

[0428] The network side device may further include a network interface 1906, which is, for example, a Common Public Radio Interface (CPRI).

[0429] Specifically, the network side device 1900 of the embodiment of the present application further includes: instructions or programs stored in the memory 1905 and executable on the processor 1904, and the processor 1904 calls the instructions or programs in the memory 1905 to execute Fig.15 The methods executed by the modules shown achieve the same technical effects, and therefore will not be described here in detail to avoid repetition.

[0430] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the configuration assistance method embodiment of the above-mentioned SL is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0431] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0432] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned SL configuration assistance method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0433] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0434] The embodiments of the present application further provide a computer program / program product, which is stored in a storage medium and is executed by at least one processor to implement the various processes of the above-mentioned SL configuration assistance method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0435] An embodiment of the present application also provides a SL configuration assistance system, including: a first terminal and a network side device, wherein the first terminal can be used to execute the steps of the SL configuration assistance method on the first terminal side as described above, and the network side device can be used to execute the steps of the SL configuration assistance method on the network side as described above.

[0436] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0437] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, disk, CD, etc.), including several instructions to enable a terminal or a network-side device to execute the methods described in each embodiment of the present application.

[0438] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of the present application and the scope of protection of the claims, and these implementation methods are all within the protection of the present application.

Claims

1. A configuration assistance method for a secondary link SL, characterized in that: include: The first terminal sends SL auxiliary information to the network side device; wherein the SL auxiliary information represents the mapping relationship between at least one PC5 service quality flow QoS flow and at least one SL frequency point, and the SL auxiliary information is used to assist in the SL wireless bearer SL-RB configuration.

2. The SL configuration assistance method according to claim 1, characterized in that: The method further comprises: The first terminal receives first radio bearer configuration information from the network side device; The first terminal performs an operation of applying the first wireless bearer configuration information; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

3. The SL configuration assistance method according to claim 1, characterized in that: The method further comprises: The first terminal receives first radio bearer configuration information from the network side device; The first terminal determines a judgment result based on whether the first radio bearer configuration information satisfies a first condition; The first terminal performs a corresponding target operation according to the judgment result; Among them, the first condition includes: the first wireless bearer configuration information includes a mapping relationship between at least one SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

4. The SL configuration assistance method according to claim 3, characterized in that: If the judgment result is that the first radio bearer configuration information satisfies the first condition, the target operation includes: applying the first radio bearer configuration information; When the judgment result is that the first radio bearer configuration information does not meet the first condition, the target operation includes at least one of the following operations: Deeming the first radio bearer configuration information invalid; Considering that the radio resource control RRC reconfiguration process corresponding to the first radio bearer configuration information fails; Trigger the RRC re-establishment process; Sending radio bearer related configuration failure information to the network side device.

5. The SL configuration assistance method according to any one of claims 1 to 4, characterized in that: The first terminal sends SL auxiliary information to the network side device, including: When determining that the second condition is met, the first terminal sends the SL auxiliary information to the network side device; The second condition includes at least one of the following: The network side device supports SL multi-carrier transmission; The network side device supports SL carrier aggregation CA function; Compared with the SL auxiliary information last sent by the first terminal, the mapping relationship is changed; The at least one PC5 QoS flow is used for SL unicast communication.

6. The SL configuration assistance method according to any one of claims 1 to 5, characterized in that: The method further comprises: The first terminal receives first configuration information from an upper layer of the first terminal; wherein the first configuration information includes a mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point; The first terminal determines the SL auxiliary information based on the first configuration information; The upper layer is a protocol layer above the access layer of the first terminal.

7. The SL configuration assistance method according to any one of claims 1 to 6, characterized in that: The SL auxiliary information includes any one of the following: A first mapping relationship between a Destination Layer-2 identifier ID, at least one PC5 QoS flow identifier, and at least one SL frequency point; A second mapping relationship between the at least one PC5 QoS flow identifier and the at least one SL frequency point.

8. The SL configuration assistance method according to claim 7, characterized in that: The first mapping relationship satisfies any one of the following: Based on a first combination of the Destination Layer-2 ID and a portion of the PC5 QoS flow identifiers in the at least one PC5 QoS flow identifier, determine at least one SL frequency point corresponding to the first combination; Based on a second combination of the Destination Layer-2 ID and some SL frequencies in the at least one SL frequency, determine at least one PC5 QoS flow identifier corresponding to the second combination.

9. The SL configuration assistance method according to claim 7 or 8, characterized in that: The second mapping relationship satisfies any one of the following: Based on a third combination of some PC5 QoS flow identifiers in the at least one PC5 QoS flow identifier, determine at least one SL frequency point corresponding to the third combination; Based on a fourth combination consisting of some SL frequency points in the at least one SL frequency point, at least one PC5 QoS flow identifier corresponding to the fourth combination is determined.

10. A configuration assistance method for a secondary link SL, characterized in that: include: The network side device receives SL auxiliary information from the first terminal; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 service quality flow QoS flow and at least one SL frequency point; The network side device sends first wireless bearer configuration information to the first terminal; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL wireless bearer SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

11. The SL configuration assistance method according to claim 10, characterized in that: The SL auxiliary information includes any one of the following: A first mapping relationship between a Destination Layer-2 identifier ID, at least one PC5 QoS flow identifier, and at least one SL frequency point; A second mapping relationship between the at least one PC5 QoS flow identifier and the at least one SL frequency point.

12. The SL configuration assistance method according to claim 11, characterized in that: The first mapping relationship satisfies any one of the following: Based on a first combination of the Destination Layer-2 ID and a portion of the PC5 QoS flow identifiers in the at least one PC5 QoS flow identifier, determine at least one SL frequency point corresponding to the first combination; Based on a second combination of the Destination Layer-2 ID and some SL frequencies in the at least one SL frequency, determine at least one PC5 QoS flow identifier corresponding to the second combination.

13. The SL configuration assistance method according to claim 11, characterized in that: The second mapping relationship satisfies any one of the following: Based on a third combination of some PC5 QoS flow identifiers in the at least one PC5 QoS flow identifier, determine at least one SL frequency point corresponding to the third combination; Based on a fourth combination consisting of some SL frequency points in the at least one SL frequency point, at least one PC5 QoS flow identifier corresponding to the fourth combination is determined.

14. The SL configuration assistance method according to any one of claims 10 to 13, characterized in that: The network side device sends first radio bearer configuration information to the first terminal, including: The network side device determines the first radio bearer configuration information based on the first information; The network side device sends the first radio bearer configuration information to the first terminal; The first information includes at least one of the following: QoS parameter requirements of the at least one PC5 QoS flow; The SL auxiliary information represents the mapping relationship.

15. A configuration assistance method for a secondary link SL, characterized in that: include: The first terminal obtains second radio bearer configuration information; wherein the second radio bearer configuration information includes a mapping relationship between at least one SL radio bearer SL-RB and at least one PC5 service quality flow QoS flow; The first terminal performs an SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point.

16. The SL configuration assistance method according to claim 15, characterized in that: The first terminal performs a SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, including: The first terminal performs an SL-RB adding operation when determining that the target QoS flow satisfies a third condition based on the second radio bearer configuration information and a mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point; The third condition includes any one of the following: The SL-RB mapped by the target QoS flow is not established; The SL-RB mapped by the target QoS flow has been established, and the SL frequency point set mapped by the target QoS flow is different from the SL frequency point set mapped by the established target SL-RB.

17. The SL configuration assistance method according to claim 16, characterized in that: The method further comprises: When the target QoS flow satisfies the third condition, the first terminal sends a first message to the second terminal, where the first message carries first indication information for indicating to perform an SL-RB adding operation; The first terminal and the second terminal communicate with each other via SL unicast.

18. The SL configuration assistance method according to claim 15, characterized in that: The first terminal performs a SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point, including: The first terminal performs a modification operation of the SL-RB when it is determined that the target QoS flow satisfies the fourth condition based on the second radio bearer configuration information and the mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point; Among them, the fourth condition includes: the SL-RB mapped by the target QoS flow has been established, and the SL frequency point set mapped by the target QoS flow is the same as the SL frequency point set mapped by the established target SL-RB.

19. The SL configuration assistance method according to claim 18, characterized in that: The method further comprises: When the target QoS flow satisfies the fourth condition, the first terminal sends a second message to the second terminal, where the second message carries second indication information for indicating to perform a modification operation of the SL-RB; The first terminal and the second terminal communicate with each other via SL unicast.

20. The SL configuration assistance method according to any one of claims 15 to 19, characterized in that: The method further comprises: The first terminal receives second configuration information from an upper layer of the first terminal; The upper layer is a protocol layer above the access layer of the first terminal, and the second configuration information includes at least one of the following: A mapping relationship between the at least one PC5 QoS flow and the at least one SL frequency point; The target QoS flow to be transmitted.

21. The SL configuration assistance method according to any one of claims 15 to 20, characterized in that: The first terminal obtains second radio bearer configuration information, including: When the first terminal is in a radio resource control RRC idle state or an RRC inactive state, the first terminal receives a system information block SIB message from a network side device, where the SIB message includes the second radio bearer configuration information; When the first terminal is out of network coverage, the first terminal obtains the second radio bearer configuration information through an SL pre-configuration message.

22. The SL configuration assistance method according to any one of claims 15 to 21, characterized in that: The second radio bearer configuration information further includes packet data convergence protocol PDCP duplication enabling configuration information corresponding to some or all of the SL-RBs in the at least one SL-RB; The method further comprises: In the case of determining to perform the SL-RB adding operation, if the number of SL frequency points associated with the first SL-RB to be established is less than the first preset threshold value, the first terminal ignores the PDCP copy enabling configuration information corresponding to the first SL-RB; When determining to perform the SL-RB modification operation, if the number of SL frequency points associated with the second SL-RB after the SL-RB modification operation is performed is less than the second preset threshold value, the first terminal ignores the PDCP copy enable configuration information corresponding to the second SL-RB.

23. A configuration auxiliary device for a secondary link SL, characterized in that: include: The first sending module is used to send SL auxiliary information to the network side device; wherein the SL auxiliary information represents the mapping relationship between at least one PC5 service quality flow QoS flow and at least one SL frequency point, and the SL auxiliary information is used to assist in the SL wireless bearer SL-RB configuration.

24. A configuration auxiliary device for a secondary link SL, characterized in that: include: A receiving module, configured to receive SL auxiliary information from a first terminal; wherein the SL auxiliary information represents a mapping relationship between at least one PC5 quality of service flow QoS flow and at least one SL frequency point; The second sending module is used to send the first wireless bearer configuration information to the first terminal; wherein the first wireless bearer configuration information includes a mapping relationship between at least one SL wireless bearer SL-RB and at least one PC5 QoS flow, and the SL frequency points of the PC5 QoS flow associated with each SL-RB configuration are the same.

25. A configuration auxiliary device for a secondary link SL, characterized in that: include: An acquisition module, configured to acquire second radio bearer configuration information; wherein the second radio bearer configuration information includes a mapping relationship between at least one SL radio bearer SL-RB and at least one PC5 service quality flow QoS flow; The first processing module is used to perform SL-RB configuration operation on the target QoS flow to be transmitted based on the second radio bearer configuration information and a mapping relationship between at least one PC5 QoS flow and at least one SL frequency point.

26. A first terminal, characterized in that: It includes a processor and a memory, the memory storing a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, it implements the steps of the configuration assistance method of the secondary link SL as described in any one of claims 1 to 9, or implements the steps of the configuration assistance method of the secondary link SL as described in any one of claims 15 to 22.

27. A network side device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the configuration assistance method of the secondary link SL as claimed in any one of claims 10 to 14 are implemented.

28. A readable storage medium, characterized in that: The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the processor, they implement the configuration assistance method of the secondary link SL as described in any one of claims 1 to 9, or implement the steps of the configuration assistance method of the secondary link SL as described in any one of claims 10 to 14, or implement the steps of the configuration assistance method of the secondary link SL as described in any one of claims 15 to 22.

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