Communication method and apparatus

Abstract

The present application relates to the technical field of communications, and provides a communication method and apparatus, which are used for improving the communication performance of sidelink (SL) communication. In the method, after receiving an SL RRC reconfiguration complete message, a terminal determines, on the basis of an inclusion relationship between a first carrier list and a second carrier list, to use a first resource set or a second resource set to perform SL communication. The first resource set is a resource set determined on the basis of the first carrier list and the second carrier list, and the second resource set is a resource set determined on the basis of the second carrier list. The method enables a terminal to reasonably utilize two carrier lists, so that the communication performance of SL communication is improved.

Description

Communication method and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on November 2, 2023, with application number 202311454231.5 and application name “A Communication Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0004] In sidelink (SL) communication, some terminals support single-carrier communication. During SL communication, the terminals use a first carrier list to provide SL configuration, which may include only one carrier. In addition to supporting single-carrier communication, some terminals may also support multi-carrier communication. Terminals supporting multi-carrier communication may use a second carrier list to provide SL configuration, which may include multiple carriers, in addition to the first carrier list.

[0005] For terminals supporting multi-carrier communication, there are two available carrier lists. If the terminal improperly uses these two carrier lists for SL communication, the communication performance of SL communication may be affected.

[0006] Summary of the Invention

[0007] The present application provides a communication method and apparatus that can improve the communication performance of SL communication.

[0008] In a first aspect, a communication method is provided. The execution subject of the method can be a terminal or a chip, chip system, or circuit located in the terminal. The method can be implemented by the following steps: receiving a sidelink radio resource control (SL RRC) reconfiguration completion message; after receiving the SL RRC reconfiguration completion message, determining, based on the inclusion relationship between the first carrier list and the second carrier list, to use a first resource set or a second resource set for sidelink (SL) communication. The first resource set is a resource set determined based on the first carrier list and the second carrier list, and the second resource set is a resource set determined based on the second carrier list.

[0009] The communication method provided in the embodiment of the present application is that after the terminal receives the SL RRC reconfiguration completion message, it can determine whether to use the second carrier list for side SL communication, or to use the first carrier list and the second carrier list for SL communication based on the inclusion relationship between the first carrier list and the second carrier list, so that the terminal can reasonably use the two carrier lists and improve the communication performance of SL communication.

[0010] In a possible implementation, the first carrier list is a carrier list corresponding to single-carrier SL communication; the second carrier list is a carrier list corresponding to multi-carrier SL communication.

[0011] In one possible implementation, when the second carrier list does not include the carriers in the first carrier list, the terminal can use the first resource set for SL communication after receiving the SL RRC reconfiguration completion message; wherein the first resource set includes the carriers included in the first carrier list and / or the resource pool corresponding to the carriers, and the carriers included in the second carrier list and / or the resource pool corresponding to the carriers.

[0012] In the above implementation method, when the second carrier list does not include the carriers in the first carrier list, the terminal can use the first carrier list and the second carrier list for SL communication after receiving the SL RRC reconfiguration completion message. This is beneficial for the terminal to reasonably use the two carrier lists when the second carrier list does not include the carriers in the first carrier list, thereby improving the communication performance of SL communication.

[0013] In one possible implementation, when the second carrier list does not include a carrier in the first carrier list, the terminal may obtain a first channel busy ratio (CBR) measurement configuration from the network device after receiving the SLRRC reconfiguration completion message. The first CBR measurement configuration includes a first carrier index and a first resource pool identifier. The first carrier index is numbered based on the carriers included in the first resource set; the first resource pool identifier includes an identifier of the resource pool corresponding to each carrier indicated by the first carrier index. The terminal sends a first CBR measurement result to the network device, and the first CBR measurement result includes the first carrier index and the first resource pool identifier.

[0014] In one possible implementation, the resource pools corresponding to the first carrier and the second carrier have the same identifier, wherein the first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or, the first carrier and the second carrier are any two carriers in the second carrier list.

[0015] In the above implementation, when the second carrier list does not include the carriers in the first carrier list, by limiting the terminal to use the carriers included in the first carrier list and the second carrier list to receive the CBR measurement configuration and send the CBR measurement results for SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists, reasonably process the CBR measurement configuration and send the CBR measurement results, thereby improving the communication performance of SL communication. At the same time, the CBR measurement configuration and the CBR measurement results include the carrier index, which can make the resource pool identifiers corresponding to different carriers the same, and reuse the current resource pool identifier definition.

[0016] In one possible implementation, when the second carrier list does not include carriers in the first carrier list, the terminal may obtain a second CBR measurement configuration from the network device after receiving the SLRRC reconfiguration complete message. The second CBR measurement configuration includes a first resource pool identifier; the first resource pool identifier includes an identifier of a resource pool corresponding to the carriers included in the first resource set. The terminal sends a second CBR measurement result to the network device, where the second CBR measurement result includes the first resource pool identifier.

[0017] In a possible implementation, the carriers included in the first carrier list and the carriers included in the second carrier list have corresponding resource pool identifiers different from each other; or, any two carriers included in the second carrier list have corresponding resource pool identifiers different from each other.

[0018] In the above implementation, when the second carrier list does not include the carriers in the first carrier list, by limiting the terminal to use the carriers included in the first carrier list and the second carrier list to receive the CBR measurement configuration and send the CBR measurement results for SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists, reasonably process the CBR measurement configuration and send the CBR measurement results, thereby improving the communication performance of SL communication. At the same time, the CBR measurement configuration and the CBR measurement results include a resource pool identifier, and limiting the resource pool identifiers corresponding to different carriers to be different, so that the CBR measurement configuration and the CBR measurement results can clearly correspond to the resource pool under a certain carrier.

[0019] In one possible implementation, when the second carrier list does not include carriers in the first carrier list, after receiving the SLRRC reconfiguration complete message, the terminal may obtain first sidelink indication information from the network device and use the resources indicated by the first sidelink indication information for SL communication. The first sidelink indication information includes a first carrier index, which is used to indicate the resources for SL communication; the first carrier index is numbered based on the carriers included in the first resource set.

[0020] In one possible implementation, the resource pool index or resource pool identifier corresponding to the first carrier and the second carrier is the same. The first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or the first carrier and the second carrier are any two carriers in the second carrier list.

[0021] In the above implementation, when the second carrier list does not include the carriers in the first carrier list, by limiting that after receiving the SL RRC reconfiguration completion message, the terminal uses the carriers included in the first carrier list and the second carrier list to process the side link resources obtained from the network device and perform SL communication, the terminal can reasonably use the two carrier lists and reasonably process the side link resources obtained from the network device, thereby improving the communication performance of SL communication. At the same time, the side link indication information includes a carrier index, which can make the resource pool index or resource pool identifier corresponding to different carriers the same, and reuse the current resource pool index or resource pool identifier definition.

[0022] In one possible implementation, when the second carrier list does not include a carrier in the first carrier list, after receiving the SLRRC reconfiguration completion message, the terminal can obtain second sidelink indication information from the network device and use the resources indicated by the second sidelink indication information for SL communication. The second sidelink indication information includes a first resource pool index or a first resource pool identifier; the first resource pool index or the first resource pool identifier is used to indicate the resources for SL communication; the first resource pool index is numbered based on the resource pool corresponding to the carrier included in the first resource set; the first resource pool identifier includes an identifier of the resource pool corresponding to the carrier included in the first resource set.

[0023] In one possible implementation, the carriers included in the first carrier list and the carriers included in the second carrier list have corresponding resource pool indexes or resource pool identifiers that are different; or, any two carriers included in the second carrier list have corresponding resource pool indexes or resource pool identifiers that are different.

[0024] In the above implementation, when the second carrier list does not include the carriers in the first carrier list, by limiting the terminal to use the carriers included in the first carrier list and the second carrier list to process the side link resources obtained from the network device and perform SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists and reasonably process the side link resources obtained from the network device, thereby improving the communication performance of SL communication. At the same time, the side link resource indication information includes a resource pool index or resource pool identifier, and limiting the resource pool index or resource pool identifier corresponding to different carriers to be different, so that the side link resource indication information can clearly correspond to the resources of the resource pool under a certain carrier.

[0025] In one possible implementation, when the second carrier list includes carriers in the first carrier list, the terminal can use a second resource set for SL communication after receiving the SL RRC reconfiguration completion message; the second resource set includes the carriers included in the second carrier list and / or the resource pool corresponding to the carriers.

[0026] In the above implementation, when the second carrier list includes carriers in the first carrier list, the terminal can use the second carrier list for SL communication after receiving the SL RRC reconfiguration completion message, which is conducive to the terminal to reasonably use the two carrier lists and improve the communication performance of SL communication.

[0027] In one possible implementation, when the second carrier list includes carriers in the first carrier list, after receiving the SL RRC reconfiguration complete message, the terminal may obtain a third CBR measurement configuration from the network device; the third CBR measurement configuration includes a second carrier index and a second resource pool identifier; the second carrier index is numbered based on the carriers included in the second resource set; the second resource pool identifier includes an identifier of a resource pool corresponding to each carrier indicated by the second carrier index. The terminal sends a third CBR measurement result to the network device, where the third CBR measurement result includes the second carrier index and the second resource pool identifier.

[0028] In one possible implementation, the resource pools corresponding to the first carrier and the second carrier have the same identifier, wherein the first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or, the first carrier and the second carrier are any two carriers in the second carrier list.

[0029] In the above implementation, when the second carrier list includes carriers in the first carrier list, by limiting the terminal to use the carriers included in the second carrier list to receive the CBR measurement configuration and send the CBR measurement results for SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists, reasonably process the CBR measurement configuration and send the CBR measurement results, thereby improving the communication performance of SL communication. At the same time, the CBR measurement configuration and the CBR measurement results include the carrier index, which can make the resource pool identifiers corresponding to different carriers the same, and reuse the current resource pool identifier definition.

[0030] In one possible implementation, when the second carrier list includes a carrier in the first carrier list, after receiving the SL RRC reconfiguration complete message, the terminal may obtain a fourth CBR measurement configuration from the network device; the fourth CBR measurement configuration includes a second resource pool identifier; the second resource pool identifier includes an identifier of a resource pool corresponding to the carrier included in the second resource set. The terminal sends a fourth CBR measurement result to the network device, where the fourth CBR measurement result includes the second resource pool identifier.

[0031] In a possible implementation, the carriers included in the first carrier list and the carriers included in the second carrier list have corresponding resource pool identifiers different from each other; or, any two carriers included in the second carrier list have corresponding resource pool identifiers different from each other.

[0032] In the above implementation, when the second carrier list includes carriers in the first carrier list, by limiting that after receiving the SL RRC reconfiguration completion message, the terminal uses the carriers included in the second carrier list to receive the CBR measurement configuration and send the CBR measurement results for SL communication, the terminal can reasonably use the two carrier lists, reasonably process the CBR measurement configuration and send the CBR measurement results, thereby improving the communication performance of SL communication. At the same time, the CBR measurement configuration and the CBR measurement results include a resource pool identifier, and limiting the resource pool identifiers corresponding to different carriers to be different, so that the CBR measurement configuration and the CBR measurement results can clearly correspond to the resource pool under a certain carrier.

[0033] In one possible implementation, when the second carrier list includes carriers in the first carrier list, after receiving the SL RRC reconfiguration completion message, the terminal can obtain third sidelink indication information from the network device and use the resources indicated by the third sidelink indication information for SL communication; the third sidelink indication information includes a second carrier index, and the second carrier index is used to indicate the resources for SL communication; the second carrier index is numbered based on the carriers included in the second resource set.

[0034] In one possible implementation, the resource pool index or resource pool identifier corresponding to the first carrier and the second carrier is the same. The first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or the first carrier and the second carrier are any two carriers in the second carrier list.

[0035] In the above implementation, when the second carrier list includes carriers in the first carrier list, by limiting the terminal to use the carriers included in the second carrier list to process the sidelink resources obtained from the network device and perform SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists and reasonably process the sidelink resources obtained from the network device, thereby improving the communication performance of SL communication. At the same time, the sidelink indication information includes a carrier index, which can make the index or resource pool identifier of the resource pool corresponding to different carriers the same, and reuse the current resource pool index or resource pool identifier definition.

[0036] In one possible implementation, when the second carrier list includes carriers in the first carrier list, the terminal can obtain fourth sidelink indication information from the network device after receiving the SL RRC reconfiguration completion message, and use the resources indicated by the fourth sidelink indication information for SL communication; the fourth sidelink indication information includes a second resource pool index or a second resource pool identifier; the second resource pool index or the second resource pool identifier is used to indicate the resources for SL communication; the second resource pool index is numbered based on the resource pool corresponding to the carrier included in the second resource set; the second resource pool identifier includes the identifier of the resource pool corresponding to the carrier included in the second resource set.

[0037] In one possible implementation, the carriers included in the first carrier list and the carriers included in the second carrier list have corresponding resource pool indexes or resource pool identifiers that are different; or, any two carriers included in the second carrier list have corresponding resource pool indexes or resource pool identifiers that are different.

[0038] In the above implementation, when the second carrier list includes carriers in the first carrier list, by limiting the terminal to use the carriers included in the second carrier list to process the sidelink resources obtained from the network device and perform SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists and reasonably process the sidelink resources obtained from the network device, thereby improving the communication performance of SL communication. At the same time, the sidelink resource indication information includes a resource pool index or resource pool identifier, and limiting the resource pool index or resource pool identifier corresponding to different carriers to be different, so that the sidelink resource indication information can clearly correspond to the resources of the resource pool under a certain carrier.

[0039] In a possible implementation, the terminal may obtain the first carrier list and the second carrier list through a specified message, where the specified message is any one of the following messages: radio resource control RRC configuration information, RRC reconfiguration information, system information block SIB message, and pre-configuration message.

[0040] In a second aspect, a communication method is provided. The method may be performed by a terminal or a chip, chip system, or circuit located in the terminal. The method may be implemented by the following steps: obtaining a channel busy ratio (CBR) measurement configuration from a network device; the CBR measurement configuration includes a carrier index and a resource pool identifier; the carrier index is used to indicate a target carrier, and the resource pool identifier is used to indicate a target resource pool in a resource pool corresponding to the target carrier; and sending a CBR measurement result to the network device, the CBR measurement result including the carrier index and resource pool identifier.

[0041] In the communication method provided in the embodiment of the present application, since the CBR measurement configuration and the CBR measurement result indicate a resource pool corresponding to a specified carrier through the carrier index and the resource pool identifier, even if the resource pool identifiers corresponding to two different carriers are the same, it is possible to distinguish through the carrier index which carrier the resource pool indicated by the resource pool identifier corresponds to.

[0042] In one possible implementation, the resource pools corresponding to the first carrier and the second carrier have the same identifier. The first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or the first carrier and the second carrier are any two carriers in the second carrier list.

[0043] In the above implementation, the CBR measurement configuration and the CBR measurement result include the carrier index and the resource pool identifier, so that the resource pool identifiers corresponding to different carriers can be the same, and the current resource pool identifier definition can be reused.

[0044] In a third aspect, a communication method is provided. The method may be performed by a terminal or a chip, chip system, or circuit located in the terminal. The method may be implemented by the following steps: obtaining sidelink indication information from a network device, wherein the sidelink indication information includes a carrier index, which indicates resources for performing SL communication. SL communication is performed using the resources indicated by the sidelink indication information.

[0045] In the communication method provided by the embodiment of the present application, since the sidelink indication information includes a carrier index, the carrier index is used to indicate the resource pool corresponding to a certain carrier. Therefore, even if the indexes or identifiers of the resource pools corresponding to two different carriers are the same, the carrier index can be used to distinguish which carrier the resource pool indicated by the sidelink indication information corresponds to.

[0046] In one possible implementation, the resource pool index or resource pool identifier corresponding to the first carrier and the second carrier is the same. The first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or the first carrier and the second carrier are any two carriers in the second carrier list.

[0047] In the above implementation, the sidelink indication information includes a carrier index, so that the indexes or resource pool identifiers of resource pools corresponding to different carriers can be the same, and the current resource pool identifier definition can be reused.

[0048] In a fourth aspect, a terminal is provided, which may include a module for executing any method provided in the first aspect, the second aspect or the third aspect.

[0049] In a fifth aspect, a terminal is provided, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the computer program is executed by the processor, the processor implements any one of the methods provided in the first aspect, the second aspect or the third aspect.

[0050] In a sixth aspect, a communication system is provided, comprising a terminal supporting SL communication, wherein the terminal is the terminal provided in the fifth aspect.

[0051] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute any one of the methods provided in the first, second or third aspects above.

[0052] In an eighth aspect, an embodiment of the present application provides a computer program product comprising computer-executable instructions, which are used to enable a computer to execute any one of the methods provided in the first, second or third aspects above.

[0053] The technical effects that can be achieved in any of the fourth to eighth aspects mentioned above can be referred to the description of the technical effects in the first to third aspects mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] FIG1 is a network architecture diagram of a communication system provided in an embodiment of the present application;

[0055] FIG2 is a flow chart of a communication method provided in an embodiment of the present application;

[0056] FIG3 is a diagram of interaction between a terminal and a network device provided in an embodiment of the present application;

[0057] FIG4 is another diagram of interaction between a terminal and a network device provided in an embodiment of the present application;

[0058] FIG5 is another diagram of interaction between a terminal and a network device provided in an embodiment of the present application;

[0059] FIG6 is another diagram of interaction between a terminal and a network device provided in an embodiment of the present application;

[0060] FIG7 is a flow chart of another communication method provided in an embodiment of the present application;

[0061] FIG8 is another diagram of interaction between a terminal and a network device provided in an embodiment of the present application;

[0062] FIG9 is another diagram of interaction between a terminal and a network device provided in an embodiment of the present application;

[0063] FIG10 is another diagram of interaction between a terminal and a network device provided in an embodiment of the present application;

[0064] FIG11 is another diagram of interaction between a terminal and a network device provided in an embodiment of the present application;

[0065] FIG12 is a structural block diagram of a terminal provided in an embodiment of the present application;

[0066] FIG13 is a structural block diagram of another terminal provided in an embodiment of the present application;

[0067] FIG14 is a structural block diagram of another terminal provided in an embodiment of the present application;

[0068] FIG15 is a schematic structural diagram of a terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The terms used in the implementation methods of the present application are only used to explain the specific embodiments of the present application and are not intended to limit the present application.

[0070] Before introducing the specific solutions provided by the embodiments of the present application, some of the terms in the present application are explained to facilitate understanding by those skilled in the art, and the terms in the present application are not limited.

[0071] (1) SL communication: SL communication refers to a communication mode in which two peer user nodes communicate directly with each other. For example, SL communication can be carried out between terminals. In SL communication, the sender can send data to the receiver through the SL physical shared channel.

[0072] (2) Carrier aggregation (CA): CA is a wireless communication technology that combines signals from multiple frequency bands. Through CA technology, terminals can use multiple frequency bands for data transmission simultaneously, thereby increasing the bandwidth and data transmission speed of the wireless network. At the same time, CA technology can also improve the coverage and reliability of communication.

[0073] In the embodiments of the present application, "multiple" refers to two or more. In view of this, in the embodiments of the present application, "multiple" can also be understood as "at least two". "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included. For example, including at least one of A, B and C, then the included ones may be A, B, C, A and B, A and C, B and C, or A, B and C. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0074] Unless otherwise specified, ordinal numbers such as "first" and "second" in the embodiments of the present application are used to distinguish multiple objects and are not used to limit the order, timing, priority or importance of multiple objects.

[0075] The foregoing describes some of the terms involved in the embodiments of the present application. The following describes the architecture of the network system to which the method provided by the present application is applied.

[0076] The communication method provided in this application can be applied to a 5G new radio (NR) system, or it can also be applied to other communication systems, for example, an Internet of Things (IoT) system, a vehicle-to-everything (V2X) system, a narrowband Internet of Things (NB-IoT) system, a long-term evolution (LTE) system, a fifth-generation (5G) communication system, an LTE and 5G hybrid architecture, a 5G new radio (NR) system, and new communication systems that will emerge in future communication developments.

[0077] The terminal involved in the embodiments of the present application is an entity on the user side for receiving or transmitting signals. The terminal can be a device that provides voice and / or data connectivity to the user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal can also be other processing devices connected to a wireless modem. The terminal can communicate with one or more core networks through a radio access network (RAN). The terminal can also be called a wireless terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, or a user equipment (UE), etc. The terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device, which exchanges voice and / or data with a radio access network. For example, the terminal may also be a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and other devices. Common terminals include, for example, mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and smart home appliances such as smart refrigerators and smart washing machines, but the embodiments of the present application are not limited thereto.

[0078] The network device involved in the embodiments of the present application is an entity on the network side for transmitting or receiving signals, which can be used to convert received air frames into Internet Protocol (IP) packets and serve as a router between the terminal and the rest of the access network, wherein the rest of the access network may include an IP network, etc. The network device can also coordinate the attribute management of the air interface. For example, the network device can be an evolutionary Node B (eNB or e-NodeB) in LTE, a new radio controller (NR controller), a gNode B (gNB) in a 5G system, a centralized unit, a new wireless base station, a radio remote module, a micro base station, a relay, a distributed unit, a transmission reception point (TRP) or a transmission point (TP) or any other wireless access device, but the embodiments of the present application are not limited thereto.

[0079] Referring to Figure 1, a communication system provided in an embodiment of the present application includes two terminals, namely terminal A and terminal B. The terminals are referred to as UEs hereinafter. Terminal A and terminal B can communicate data through the network device 100, or they can communicate directly between UEs without the help of the network device 100. The interface between UEs can be called a PC5 interface, which is similar to the Uu interface between the UE and the base station. The communication link between terminal A and terminal B can be called SL. A typical application scenario of SL communication can be a vehicle networking system. In a vehicle networking system, each car can be understood as a UE, and data can be transmitted directly between UEs through SL without going through the network, thereby effectively reducing communication delays. Unicast, multicast, and broadcast can be supported on SL.

[0080] The UE (e.g., terminal A or terminal B) in this communication system can operate in either network device-allocated resource mode (mode 1) or user-selected resource mode (mode 2). Mode 1 can be applied to SL communication in situations where network coverage is available. The network device can allocate resources for SL communication to terminals A and B based on the buffer status report (BSR) reported by the terminals. In mode 2, the transmitter selects transmission resources from a resource pool configured by the network device or a preset resource pool for communication.

[0081] Exemplarily, terminal A can serve as a transmitter of data or signaling, and terminal B can serve as a receiver of data or signaling. Terminal A can be in an in coverage (IC) state or an out of coverage (OOC) state. When terminal A is in a radio resource control (RRC) connected state, terminal A can obtain SL resources for SL communication from the base station. This communication mode can be referred to as a resource allocation mode of mode 1. Specifically, the base station can schedule SL resources for the terminal through downlink control information (DCI), or configure an SL configuration grant (SL configured grant) for the terminal through an RRC message. When terminal A operates in mode 2 (can be in an RRC connected state, an RRC inactive state, an RRC idle state, or an OOC state), terminal A can receive an SL resource pool configuration from the base station, or obtain an SL resource pool configuration from a pre-configuration, and then select an SL resource from the SL resource pool for transmission. Terminal A can select SL resources randomly, or select based on the results of sensing or partial sensing.

[0082] Optionally, the communication system may further include a network device that can perform uplink / downlink communication with a UE in the communication system (e.g., terminal A or terminal B). When a terminal in the communication system (e.g., terminal A or terminal B) operates in mode 1, the network device may further allocate resources for SL communication to terminal A or terminal B.

[0083] FIG1 is merely a schematic diagram and does not specifically limit the type of the communication system, or the number and type of devices included in the communication system.

[0084] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

[0085] In sidelink SL communication, some terminals support single-carrier communication, and the terminals use the first carrier list to provide SL configuration during the SL communication process; some terminals, in addition to supporting single-carrier communication, can also support CA, that is, support multi-carrier communication. In addition to using the first carrier list, terminals that support multi-carrier communication can also use the second carrier list to provide SL configuration.

[0086] Regarding how a terminal uses two carrier lists for SL communication, embodiments of the present application provide a communication method and apparatus. The method and apparatus are based on the same concept. Since the method and apparatus solve similar problems, the implementation of the apparatus and method can refer to each other, and the repetitions are not repeated here.

[0087] A terminal may receive data sent by one or more other terminals. Hereinafter, a terminal that receives data is referred to as a receiving terminal, and a terminal that sends data is referred to as a sending terminal. That is, a receiving terminal may receive data sent by one or more sending terminals. It should be understood that the terms "sending terminal" and "receiving terminal" are relative terms; a sending terminal can also have a receiving function, and a receiving terminal can also have a sending function.

[0088] In the embodiment of the present application, terminal A may refer to a transmitting end, and terminal B may refer to a receiving end, and both the transmitting end and the receiving end support CA.

[0089] The communication method provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0090] In some embodiments, the second carrier list does not include carriers in the first carrier list. The terminal may refer to the communication method shown in FIG2 , which may be performed by a transmitting end (hereinafter referred to as terminal A). As shown in FIG2 , the communication method may include the following steps:

[0091] S201: Acquire a first carrier list and a second carrier list.

[0092] The second carrier list does not include carriers in the first carrier list, that is, there is no overlap or intersection between the carriers included in the second carrier list and the carriers included in the first carrier list.

[0093] Exemplarily, terminal A may obtain a first carrier list and a second carrier list through designated information. The designated message is any one of the following messages: RRC dedicated signaling, a system information block (SIB) message, and a pre-configuration message. The RRC dedicated signaling may include but is not limited to RRC configuration information, RRC reconfiguration information, and the like. In some embodiments, the terminal may obtain a first carrier list through first designated information, wherein the first designated message may be any one of the following messages: RRC configuration information, RRC reconfiguration information, SIB message, and pre-configuration message. The terminal may obtain a second carrier list through second designated information, wherein the second designated message may be any one of the following messages: RRC configuration information, RRC reconfiguration information, SIB message, and pre-configuration message.

[0094] The first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list corresponding to multi-carrier SL communication; or, the first carrier list is a carrier list corresponding to SL communication in R16 or R17, and the second carrier list is a carrier list corresponding to SL communication in R18 or R18+. R16 is the 16th public version of the protocol of the International Telecommunication Convention, R17 is the 17th public version of the protocol of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0095] S202: Perform SL communication based on the first carrier list and / or the second carrier list.

[0096] In some embodiments, before receiving the SL RRC reconfiguration completion message sent by terminal B, or in other words, before the carrier configuration signaling is completed, terminal A can perform SL communication based on the first carrier list. The completion of carrier configuration signaling refers to the exchange of carrier configurations between terminals and the sending of corresponding completion signaling. For example, terminal A sends a SL RRC reconfiguration message to terminal B, and the SL RRC reconfiguration message includes carrier configuration. After terminal B receives the SL RRC reconfiguration message sent by terminal A, it sends a SL RRC reconfiguration completion message to terminal A, which can be regarded as the completion of the carrier configuration signaling between terminal A and terminal B. Terminal A is based on the first carrier list, which can be understood as terminal A using the carriers included in the first carrier list to perform SL communication; or, terminal A uses the resource pool corresponding to the carriers included in the first carrier list to perform SL communication.

[0097] After receiving the SL RRC reconfiguration completion message sent by terminal B, or in other words, after the carrier configuration signaling is completed, terminal A can perform SL communication based on the first carrier list and the second carrier list. Exemplarily, terminal A can use the carriers included in the first carrier list and the carriers included in the second carrier list to perform SL communication; or, terminal A can use the resource pools corresponding to the carriers included in the first carrier list and the resource pools corresponding to the carriers included in the second carrier list to perform SL communication. For example, assuming that the first carrier list includes carrier 1 and the second carrier list includes carrier 2, carrier 3, and carrier 4, terminal A can use carrier 1, carrier 2, carrier 3, and carrier 4 for SL communication, that is, terminal A can select SL resources for data transmission from carrier 1, carrier 2, carrier 3, and carrier 4; or, terminal A can use the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, the resource pool corresponding to carrier 3, and the resource pool corresponding to carrier 4 for SL communication, that is, terminal A can select SL resources for data transmission from the resource pools corresponding to carrier 1, the resource pool corresponding to carrier 2, the resource pool corresponding to carrier 3, and the resource pool corresponding to carrier 4. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A after terminal A establishes a SL communication link with terminal B. The SL RRC reconfiguration complete message may be the SL RRC reconfiguration complete message corresponding to the SL RRC reconfiguration message including the SL carrier configuration.

[0098] In the above embodiment, by limiting that after receiving the SL RRC reconfiguration completion message, according to the inclusion relationship between the first carrier list and the second carrier list, when the second carrier list does not include the carriers in the first carrier list, the terminal performs SL communication based on the first carrier list and the second carrier list, so that the terminal can reasonably use the two carrier lists, and the communication performance of SL CA can be improved.

[0099] In some embodiments, terminal A may receive a CBR measurement configuration from a network device. The CBR measurement configuration may include a carrier index and a resource pool identifier, which is used to indicate a resource pool corresponding to a specified carrier. The resource pool identifier is used to indicate the resource pool corresponding to the CBR measurement configuration. The carrier index is used to indicate a carrier, which is the carrier corresponding to the resource pool corresponding to the CBR measurement configuration. The carrier index may be numbered based on the carriers included in the first carrier list and / or the second carrier list, and the resource pool identifier may include an identifier of the resource pool corresponding to each carrier indicated by the carrier index.

[0100] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0101] The identifiers of the resource pools corresponding to the different carriers included in the first carrier list or the second carrier list may be the same. The identifier of the resource pool corresponding to the first carrier included in the first carrier list and the identifier of the resource pool corresponding to the second carrier included in the second carrier list may be the same. That is, the identifiers of the resource pools corresponding to any two different carriers in the first carrier list and the second carrier list may be the same. Since the CBR measurement configuration indicates a resource pool corresponding to a specified carrier through the carrier index and the resource pool identifier, even if the identifiers of the resource pools corresponding to two different carriers are the same, it is possible to distinguish through the carrier index which carrier the resource pool indicated by the resource pool identifier corresponds to.

[0102] Terminal A may send a CBR measurement result to the network device based on the received CBR measurement configuration and the CBR measurement result. The CBR measurement result may include the carrier index and resource pool identifier included in the CBR measurement configuration.

[0103] In the above embodiment, the CBR measurement configuration and the CBR measurement result include the carrier index and the resource pool identifier, so that the resource pool identifiers corresponding to different carriers can be the same, and the current resource pool identifier definition can be reused.

[0104] In other embodiments, terminal A may receive sidelink indication information from a network device. The sidelink indication information may include a carrier index indicating resources for SL communication. Terminal A may use the resources indicated by the sidelink indication information for SL communication. The carrier index is used to indicate the carrier corresponding to the resources corresponding to the sidelink indication information. The carrier index may be numbered based on the carriers included in the first carrier list and / or the second carrier list.

[0105] In some optional embodiments, the sidelink indication information may include, in addition to the carrier index, a resource pool index or resource pool identifier; the resource pool index or resource pool identifier is used to indicate the resource pool corresponding to the resources indicated by the sidelink indication information. The resource pool index or resource pool identifier may include the index or identifier of the resource pool corresponding to each carrier indicated by the carrier index in the sidelink indication information a.

[0106] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0107] The indexes or resource pool identifiers of the resource pools corresponding to different carriers included in the first carrier list or the second carrier list may be the same. The index or resource pool identifier of the resource pool corresponding to the first carrier included in the first carrier list and the index or resource pool identifier of the resource pool corresponding to the second carrier included in the second carrier list may be the same. In other words, the indexes or resource pool identifiers of the resource pools corresponding to any two different carriers in the first carrier list and the second carrier list may be the same.

[0108] In the above embodiment, the sidelink indication information includes a carrier index, so that the resource pool index or resource pool identifier corresponding to different carriers can be the same, and the current resource pool index or resource pool identifier definition can be reused.

[0109] Several specific embodiments of the present application are described in detail below. In an optional embodiment, the interaction process between terminal A and the network device, as shown in FIG3 , may include the following steps:

[0110] S301: The network device sends a CBR measurement configuration a to terminal A.

[0111] Before receiving the SL RRC reconfiguration completion message, terminal A can obtain the channel busy ratio (CBR) measurement configuration a from the network device. The CBR measurement configuration a may include a carrier index and a resource pool identifier, which is used to indicate a resource pool corresponding to a specified carrier. The resource pool identifier is used to indicate the resource pool corresponding to the CBR measurement configuration a. The carrier index is used to indicate a carrier, which is the carrier corresponding to the resource pool corresponding to the CBR measurement configuration a. The carrier index can be numbered based on the carriers included in the first carrier list; the resource pool identifier may include the identifier of the resource pool corresponding to each carrier indicated by the above carrier index. For example, assuming that the first carrier list includes M carriers, the carrier index can use 0, 1, and M-1 to indicate the M carriers included in the first carrier list. The first carrier list is a carrier list corresponding to single-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only an SL configuration corresponding to one carrier.

[0112] S302: Terminal A performs CBR measurement.

[0113] Terminal A can perform CBR measurements on each currently available SL resource to determine the CBR of each resource pool. For example, the SL resources currently available to terminal A include the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, the resource pool corresponding to carrier 3, and the resource pool corresponding to carrier 4. Terminal A can perform CBR measurements to determine the CBR of the resource pool corresponding to carrier 1, the CBR of the resource pool corresponding to carrier 2, the CBR of the resource pool corresponding to carrier 3, and the CBR of the resource pool corresponding to carrier 4.

[0114] In some embodiments, step S302 may be performed before step S301.

[0115] S303: Terminal A sends the CBR measurement result a to the network device.

[0116] The CBR measurement result a may include the carrier index and resource pool identifier included in the CBR measurement configuration a. The carrier index may be numbered based on the carriers included in the first carrier list; the resource pool identifier may include the identifier of the resource pool corresponding to each carrier indicated by the carrier index. For example, assuming that the CBR measurement configuration a includes the carrier index of carrier 1 and the identifier of the resource pool corresponding to carrier 1, the CBR measurement result a may include the carrier index of carrier 1 and the identifier of the resource pool corresponding to carrier 1.

[0117] The network device receives the CBR measurement result a sent by terminal A, and schedules SL resources or provides SL resource configuration for terminal A according to the CBR of the resource pool included in the CBR measurement result a.

[0118] The above process can be understood as that, before receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list.

[0119] S304, terminal A receives the SL RRC reconfiguration completion message.

[0120] In some embodiments, when terminal A and terminal B perform SL communication, terminal A sends a SL RRC reconfiguration message to terminal B. After receiving the SL RRC reconfiguration message sent by terminal A, terminal B sends a SL RRC reconfiguration complete message to terminal A. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A during the process of establishing a SL communication link between terminal A and terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to a SL RRC reconfiguration message including an SL carrier configuration.

[0121] S305: The network device sends CBR measurement configuration b to terminal A.

[0122] After receiving the SL RRC reconfiguration complete message, terminal A may obtain CBR measurement configuration b from the network device. CBR measurement configuration b may include a carrier index and a resource pool identifier. The carrier index may be numbered based on the carriers included in the first resource set. The first resource set may include a first carrier list and a second carrier list.

[0123] In an optional embodiment, the carrier index in the CBR measurement configuration b may be numbered based on the carriers included in the first carrier list and the carriers included in the second carrier list; the resource pool identifier may include an identifier of the resource pool corresponding to each carrier indicated by the above carrier index. For example, assuming that the first carrier list includes carrier 1 and the second carrier list includes carrier 2, carrier 3, and carrier 4, the carrier index in the CBR measurement configuration b may use 0, 1, 2, and 3 to indicate carrier 1, carrier 2, carrier 3, and carrier 4, respectively, and the resource pool identifier in the CBR measurement configuration b may include an identifier of the resource pool corresponding to carrier 1, an identifier of the resource pool corresponding to carrier 2, an identifier of the resource pool corresponding to carrier 3, and an identifier of the resource pool corresponding to carrier 4. For another example, assuming that the first carrier list includes M carriers and the second carrier list includes N carriers, the carrier index in the CBR measurement configuration b may use 0, 1, and M-1 to indicate the M carriers included in the first carrier list, and use M, M+1, and M+N-1 to indicate the N carriers included in the second carrier list.

[0124] In another optional embodiment, the carrier index in the CBR measurement configuration b may also be numbered based on some carriers included in the first carrier list and the second carrier list. For example, the carrier index in the CBR measurement configuration b may be numbered based on all carriers included in the first carrier list, or the carrier index in the CBR measurement configuration b may be numbered based on all carriers included in the second carrier list, or the carrier index in the CBR measurement configuration b may be numbered based on some carriers in the first carrier list, or the carrier index in the CBR measurement configuration b may be numbered based on some carriers in the second carrier list, or the carrier index in the CBR measurement configuration b may be numbered based on some carriers in the first carrier list and some carriers in the second carrier list.

[0125] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0126] The identifiers of the resource pools corresponding to the different carriers included in the first carrier list or the second carrier list may be the same. The identifier of the resource pool corresponding to the first carrier included in the first carrier list and the identifier of the resource pool corresponding to the second carrier included in the second carrier list may be the same. That is, the identifiers of the resource pools corresponding to any two different carriers in the first resource set may be the same. Since the CBR measurement configuration b indicates a resource pool corresponding to a specified carrier through the carrier index and the resource pool identifier, even if the identifiers of the resource pools corresponding to two different carriers are the same, it is possible to distinguish by the carrier index which carrier the resource pool indicated by the resource pool identifier corresponds to.

[0127] S306: Terminal A performs CBR measurement.

[0128] Terminal A can perform CBR measurements on each currently available SL resource to determine the CBR of each resource pool. For example, the SL resources currently available to terminal A include the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, the resource pool corresponding to carrier 3, and the resource pool corresponding to carrier 4. Terminal A can perform CBR measurements to determine the CBR of the resource pool corresponding to carrier 1, the CBR of the resource pool corresponding to carrier 2, the CBR of the resource pool corresponding to carrier 3, and the CBR of the resource pool corresponding to carrier 4.

[0129] In some embodiments, step S306 may be performed before step S305.

[0130] S307: Terminal A sends the CBR measurement result b to the network device.

[0131] The CBR measurement result b may include the carrier index and resource pool identifier included in the CBR measurement configuration b. The carrier index may be numbered based on the carriers included in the first resource set, and the resource pool identifier may include the identifier of the resource pool corresponding to each carrier indicated by the carrier index. For example, assuming that the CBR measurement configuration b includes carrier 1 and the identifier of the resource pool corresponding to carrier 1, as well as carrier 2 and the identifier of the resource pool corresponding to carrier 2, the CBR measurement result b may include carrier 1 and the identifier of the resource pool corresponding to carrier 1, as well as carrier 2 and the identifier of the resource pool corresponding to carrier 2.

[0132] For another example, assuming that the CBR measurement configuration b includes the identifier of carrier 1 and the resource pool corresponding to carrier 1, the identifier of carrier 2 and the resource pool corresponding to carrier 2, the identifier of carrier 3 and the resource pool corresponding to carrier 3, and the identifier of carrier 4 and the resource pool corresponding to carrier 4, then the CBR measurement result b may include the identifier of carrier 1 and the resource pool corresponding to carrier 1, the identifier of carrier 2 and the resource pool corresponding to carrier 2, the identifier of carrier 3 and the resource pool corresponding to carrier 3, and the identifier of carrier 4 and the resource pool corresponding to carrier 4.

[0133] The network device receives the CBR measurement result b sent by terminal A, and schedules SL resources or provides SL resource configuration for terminal A according to the CBR of the resource pool included in the CBR measurement result b.

[0134] The above process can be understood as, after receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list and the second carrier list.

[0135] In the above embodiment, by limiting the use of the carriers included in the first carrier list and the second carrier list to receive the CBR measurement configuration and send the CBR measurement results for SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists, reasonably process the CBR measurement configuration and send the CBR measurement results, thereby improving the communication performance of SL CA. At the same time, the CBR measurement configuration and the CBR measurement results include the carrier index, which can make the resource pool identifiers corresponding to different carriers the same, and reuse the current resource pool identifier definition.

[0136] In another optional embodiment, the interaction process between terminal A and the network device, as shown in FIG4 , may include the following steps:

[0137] S401: The network device sends a CBR measurement configuration c to terminal A.

[0138] Before receiving the SL RRC reconfiguration completion message, terminal A may obtain the CBR measurement configuration c from the network device. The CBR measurement configuration c may include a resource pool identifier. The resource pool identifier is used to indicate the resource pool corresponding to the CBR measurement configuration. The resource pool identifier includes an identifier of the resource pool corresponding to the carrier included in the first carrier list. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only an SL configuration corresponding to one carrier.

[0139] S402: Terminal A performs CBR measurement.

[0140] Terminal A can perform CBR measurements on each currently available SL resource to determine the CBR of each resource pool. For example, the SL resources currently available to terminal A include the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, the resource pool corresponding to carrier 3, and the resource pool corresponding to carrier 4. Terminal A can perform CBR measurements to determine the CBR of the resource pool corresponding to carrier 1, the CBR of the resource pool corresponding to carrier 2, the CBR of the resource pool corresponding to carrier 3, and the CBR of the resource pool corresponding to carrier 4.

[0141] In some embodiments, step S402 may be performed before step S401.

[0142] S403: Terminal A sends the CBR measurement result c to the network device.

[0143] The CBR measurement result c may include the resource pool identifier included in the CBR measurement configuration c. The resource pool identifier includes the identifier of the resource pool corresponding to the carrier included in the first carrier list. For example, assuming that the CBR measurement configuration c includes the identifier of the resource pool corresponding to carrier 1, the CBR measurement result c may also include the identifier of the resource pool corresponding to carrier 1.

[0144] The network device receives the CBR measurement result c sent by terminal A, and schedules SL resources or provides SL resource configuration for terminal A according to the CBR of the resource pool included in the CBR measurement result c.

[0145] The above process can be understood as that, before receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list.

[0146] S404, terminal A receives an SL RRC reconfiguration completion message.

[0147] In some embodiments, when terminal A and terminal B perform SL communication, terminal A sends a SL RRC reconfiguration message to terminal B. After receiving the SL RRC reconfiguration message sent by terminal A, terminal B sends a SL RRC reconfiguration complete message to terminal A. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A during the process of establishing a SL communication link between terminal A and terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to a SL RRC reconfiguration message including an SL carrier configuration.

[0148] S405: The network device sends a CBR measurement configuration d to terminal A.

[0149] After receiving the SL RRC reconfiguration complete message, terminal A may obtain a CBR measurement configuration d from the network device. The CBR measurement configuration d may include a resource pool identifier. The resource pool identifier is used to indicate the resource pool corresponding to the CBR measurement configuration. The resource pool identifier includes an identifier of a resource pool corresponding to a carrier included in a first resource set, where the first resource set may include a first carrier list and a second carrier list.

[0150] In an optional embodiment, the resource pool identifier in the CBR measurement configuration d may include identifiers of resource pools corresponding to the carriers in the first carrier list and identifiers of resource pools corresponding to the carriers included in the second carrier list. Exemplarily, the resource pool identifiers in the CBR measurement configuration d may be numbered sequentially starting from 0 according to the resource pools corresponding to the carriers included in the first carrier list and the second carrier list. For example, 0, 1, ..., X-1 respectively indicate X resource pools corresponding to the carriers included in the first carrier list, and X, X+1, ..., X+Y-1 respectively indicate Y resource pools corresponding to the carriers included in the second carrier list. In another optional embodiment, the resource pool identifier in the CBR measurement configuration d may also include identifiers of resource pools corresponding to some carriers in the first carrier list and the second carrier list. For example, the resource pool identifier in the CBR measurement configuration d may include the identifier of the resource pool corresponding to all carriers in the first carrier list, or the resource pool identifier in the CBR measurement configuration d may include the identifier of the resource pool corresponding to all carriers in the second carrier list, or the resource pool identifier in the CBR measurement configuration d may include the identifier of the resource pool corresponding to some carriers in the first carrier list, or the resource pool identifier in the CBR measurement configuration d may include the identifier of the resource pool corresponding to some carriers in the second carrier list, or the resource pool identifier in the CBR measurement configuration d may be based on the identifier of the resource pool corresponding to some carriers in the first carrier list and the identifier of the resource pool corresponding to some carriers in the second carrier list.

[0151] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0152] The identifiers of the resource pools corresponding to different carriers included in the first carrier list or the second carrier list are different; in other words, the identifiers of the resource pools corresponding to any carrier included in the first carrier list and any carrier included in the second carrier list are different; or, the identifiers of the resource pools corresponding to any two carriers included in the second carrier list are different.

[0153] S406: Terminal A performs CBR measurement.

[0154] Terminal A can perform CBR measurements on each currently available SL resource to determine the CBR of each resource pool. For example, the SL resources currently available to terminal A include the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, the resource pool corresponding to carrier 3, and the resource pool corresponding to carrier 4. Terminal A can perform CBR measurements to determine the CBR of the resource pool corresponding to carrier 1, the CBR of the resource pool corresponding to carrier 2, the CBR of the resource pool corresponding to carrier 3, and the CBR of the resource pool corresponding to carrier 4.

[0155] In some embodiments, step S406 may be performed before step S405.

[0156] S407: Terminal A sends the CBR measurement result d to the network device.

[0157] The CBR measurement result b may include the resource pool identifier included in the CBR measurement configuration d. The resource pool identifier includes the identifier of the resource pool corresponding to the carrier included in the first resource set. For example, assuming that the CBR measurement configuration d includes the identifier of the resource pool corresponding to carrier 1 and the identifier of the resource pool corresponding to carrier 2, the CBR measurement result d may also include the identifier of the resource pool corresponding to carrier 1 and the identifier of the resource pool corresponding to carrier 2.

[0158] For another example, assuming that the CBR measurement configuration d includes the identifier of the resource pool corresponding to carrier 1, the identifier of the resource pool corresponding to carrier 2, the identifier of the resource pool corresponding to carrier 3, and the identifier of the resource pool corresponding to carrier 4, then the CBR measurement result d may include the identifier of the resource pool corresponding to carrier 1, the identifier of the resource pool corresponding to carrier 2, the identifier of the resource pool corresponding to carrier 3, and the identifier of the resource pool corresponding to carrier 4.

[0159] The network device receives the CBR measurement result d sent by terminal A, and schedules SL resources or provides SL resource configuration for terminal A according to the CBR of the resource pool included in the CBR measurement result d.

[0160] The above process can be understood as, after receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list and the second carrier list.

[0161] In the above embodiment, by limiting the terminal to use the resource pools included in the first carrier list and the second carrier list to receive the CBR measurement configuration and send the CBR measurement results for SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists, reasonably process the CBR measurement configuration and send the CBR measurement results, thereby improving the communication performance of SL CA. At the same time, the CBR measurement configuration and the CBR measurement results include a resource pool identifier, and limiting the resource pool identifiers corresponding to different carriers to be different, so that the CBR measurement configuration and the CBR measurement results can clearly correspond to the resource pool under a certain carrier.

[0162] In another optional embodiment, the interaction process between terminal A and the network device, as shown in FIG5 , may include the following steps:

[0163] S501: The network device sends sidelink indication information a to terminal A.

[0164] Before receiving the SL RRC reconfiguration completion message, terminal A can obtain the side link indication information a from the network device. The side link indication information a may include a carrier index. The carrier index is used to indicate the resources for SL communication, or in other words, the carrier index is used to indicate the carrier, which is the carrier corresponding to the resources indicated by the side link indication information a. The carrier index can be numbered based on the carriers included in the first carrier list. For example, assuming that the first carrier list includes M carriers, the carrier index can use 0, 1, and M-1 to indicate the M carriers included in the first carrier list. The first carrier list is a carrier list corresponding to single-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only an SL configuration corresponding to one carrier.

[0165] In some embodiments, in addition to the carrier index, the sidelink indication information a may also include a resource pool index or resource pool identifier; the resource pool index or resource pool identifier is used to indicate the resource pool corresponding to the resources indicated by the sidelink indication information a. The resource pool index or resource pool identifier may include the index or identifier of the resource pool corresponding to each carrier indicated by the carrier index in the sidelink indication information a.

[0166] The sidelink resource indication information a may be DCI or SL configured grant information. In one embodiment, the network device may send DCI to terminal A to indicate the SL resources scheduled by the network device for terminal A. In another embodiment, the network device may send SL configured grant information to terminal A to indicate the SL resources configured by the network device for terminal A.

[0167] S502: Terminal A uses the resources indicated by the sidelink indication information a to perform SL communication.

[0168] The resource indicated by the sidelink indication information a refers to the carrier indicated by the carrier index of the sidelink indication information a, or the resource pool indicated by the resource pool index or resource pool identifier. Terminal A uses the resource indicated by the sidelink indication information a for SL communication or discovery.

[0169] The above process can be understood as that, before receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list.

[0170] S503, terminal A receives an SL RRC reconfiguration completion message.

[0171] In some embodiments, when terminal A and terminal B perform SL communication, terminal A sends a SL RRC reconfiguration message to terminal B. After receiving the SL RRC reconfiguration message sent by terminal A, terminal B sends a SL RRC reconfiguration complete message to terminal A. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A during the process of establishing a SL communication link between terminal A and terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to a SL RRC reconfiguration message including an SL carrier configuration.

[0172] S504: The network device sends sidelink indication information b to terminal A.

[0173] After receiving the SL RRC reconfiguration completion message, terminal A can obtain sidelink indication information b from the network device. Sidelink resource indication information b can be DCI or SL configured grant information. Sidelink indication information b can include a carrier index. The carrier index is used to indicate the resources for SL communication, or in other words, the carrier index is used to indicate the carrier corresponding to the resources indicated by the sidelink indication information b. The carrier index can be numbered based on the carriers included in the first resource set. The first resource set can include a first carrier list and a second carrier list.

[0174] In an optional embodiment, the carrier index in the sidelink indication information b may be numbered based on the carriers included in the first carrier list and the carriers included in the second carrier list. For example, assuming that the first carrier list includes carrier 1 and the second carrier list includes carrier 2, carrier 3, and carrier 4, the carrier index in the sidelink indication information b may be 0, 1, 2, and 3 to indicate carrier 1, carrier 2, carrier 3, and carrier 4, respectively. For another example, assuming that the first carrier list includes M carriers and the second carrier list includes N carriers, the carrier index in the sidelink indication information b may be 0, 1, and M-1 to indicate the M carriers included in the first carrier list, and M, M+1, and M+N-1 to indicate the N carriers included in the second carrier list.

[0175] In another optional embodiment, the carrier index in the sidelink indication information b may also be numbered based on some carriers included in the first carrier list and the second carrier list. For example, the carrier index in the sidelink indication information b may be numbered based on all carriers included in the first carrier list, or the carrier index in the sidelink indication information b may be numbered based on all carriers included in the second carrier list, or the carrier index in the sidelink indication information b may be numbered based on some carriers in the first carrier list, or the carrier index in the sidelink indication information b may be numbered based on some carriers in the second carrier list, or the carrier index in the sidelink indication information b may be numbered based on some carriers in the first carrier list and some carriers in the second carrier list.

[0176] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0177] The resource pool indexes or resource pool identifiers corresponding to different carriers included in the first carrier list or the second carrier list may be the same. The resource pool index or resource pool identifier corresponding to the first carrier included in the first carrier list and the resource pool index or resource pool identifier corresponding to the second carrier included in the second carrier list may be the same. In other words, the resource pool indexes or resource pool identifiers corresponding to any two different carriers in the first resource set may be the same.

[0178] In some embodiments, in addition to the carrier index, the sidelink indication information b may also include a resource pool index or resource pool identifier; the resource pool index or resource pool identifier is used to indicate the resource pool corresponding to the resources indicated by the sidelink indication information b. The resource pool index or resource pool identifier may include the index or identifier of the resource pool corresponding to each carrier indicated by the carrier index in the sidelink indication information b.

[0179] S505: Terminal A uses the resources indicated by the sidelink indication information b to perform SL communication.

[0180] The resource indicated by the sidelink indication information b refers to the carrier indicated by the carrier index of the sidelink indication information b, or the resource pool indicated by the resource pool index or resource pool identifier. Terminal A uses the resource indicated by the sidelink indication information b for SL communication or discovery.

[0181] The above process can be understood as, after receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list and the second carrier list.

[0182] In the above embodiment, by limiting the use of carriers included in the first carrier list and the second carrier list by the terminal to process sidelink resources obtained from the network device after receiving the SL RRC reconfiguration complete message, the terminal can reasonably use the two carrier lists and reasonably process the sidelink resources obtained from the network device, thereby improving the communication performance of SL CA. At the same time, the sidelink indication information includes a carrier index, which can ensure that the index or resource pool identifier corresponding to different carriers can be the same, and the resource pool index or resource pool identifier definition can be reused.

[0183] In another optional embodiment, the interaction process between terminal A and the network device, as shown in FIG6 , may include the following steps:

[0184] S601: The network device sends sidelink indication information c to terminal A.

[0185] Before receiving the SL RRC reconfiguration completion message, terminal A may obtain the side link indication information c from the network device. The side link indication information c may include a resource pool index or a resource pool identifier. In some embodiments, the side link indication information c may include a resource pool index; in other embodiments, the side link indication information c may include a resource pool identifier. The resource pool index or resource pool identifier is used to indicate the resources for SL communication, or in other words, the resource pool index or resource pool identifier is used to indicate the resource pool, which is the resource pool corresponding to the resources indicated by the side link resource indication information c. The resource pool index is numbered based on the resource pool corresponding to the carrier included in the first carrier list, and the resource pool identifier includes the identifier of the resource pool corresponding to the carrier included in the first carrier list. The first carrier list is a carrier list corresponding to single-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0186] The sidelink resource indication information c may be a DCI or a SL configured grant information. In one embodiment, the network device may send a DCI to terminal A to indicate the SL resources scheduled by the network device for terminal A. In another embodiment, the network device may send a SL configured grant information to terminal A to indicate the SL resources configured by the network device for terminal A.

[0187] S602: Terminal A uses the resources indicated by the sidelink indication information c to perform SL communication.

[0188] The resource indicated by the sidelink indication information c refers to the resource pool indicated by the resource pool index or resource pool identifier in the sidelink indication information c. Terminal A uses the resource indicated by the sidelink indication information c to perform SL communication or discovery.

[0189] The above process can be understood as that, before receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list.

[0190] S603, terminal A receives an SL RRC reconfiguration completion message.

[0191] In some embodiments, when terminal A and terminal B perform SL communication, terminal A sends a SL RRC reconfiguration message to terminal B. After receiving the SL RRC reconfiguration message sent by terminal A, terminal B sends a SL RRC reconfiguration complete message to terminal A. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A during the process of establishing a SL communication link between terminal A and terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to a SL RRC reconfiguration message including an SL carrier configuration.

[0192] S604: The network device sends sidelink indication information d to terminal A.

[0193] After receiving the SL RRC reconfiguration completion message, terminal A can obtain the side link indication information d from the network device. Resource pool index or resource pool identifier. In some embodiments, the side link indication information d may include a resource pool index; in other embodiments, the side link indication information d may include a resource pool identifier. The resource pool index or resource pool identifier is used to indicate the resources for SL communication, or in other words, the resource pool index or resource pool identifier is used to indicate the resource pool, which is the resource pool corresponding to the resource indicated by the side link resource indication information d. The resource pool index in the side link indication information d is numbered based on the resource pool corresponding to the carrier included in the first resource set, and the resource pool identifier in the side link indication information d includes the identifier of the resource pool corresponding to the carrier included in the first resource set. The first resource set may include a first carrier list and a second carrier list.

[0194] In an optional embodiment, the resource pool index in the sidelink indication information d can be numbered based on the resource pool corresponding to the carrier included in the first carrier list and the resource pool corresponding to the carrier included in the second carrier list. Among them, a carrier configuration may include the configuration of one or more resource pools. Exemplarily, the sidelink resource indication information d can be DCI or SL configured grant information. In one embodiment, the network device can send DCI to terminal A to indicate the SL resources scheduled by the network device for terminal A. The DCI may include a resource pool index, and the resource pool index is used to indicate which resource pool the SL resources scheduled by the network device for terminal A are SL resources on. The resource pool index is numbered sequentially starting from 0 based on the resource pools corresponding to the carriers included in the configured first carrier list and the second carrier list. For example, 0, 1, ..., X-1 respectively indicate the X resource pools corresponding to the carriers included in the first carrier list, and X, X+1, ..., X+Y-1 respectively indicate the Y resource pools corresponding to the carriers included in the second carrier list. In another embodiment, the network device can send SL configured grant information to terminal A to indicate the SL resources configured by the network device for terminal A. The SL configured grant information includes a resource pool identifier, which is used to indicate the resource pool on which the scheduled SL resources belong. The resource pool identifier is an identifier of the resource pool corresponding to the carriers included in the first carrier list and the second carrier list.

[0195] In another optional embodiment, the resource pool index in the sidelink indication information d may also be numbered based on the resource pools corresponding to some carriers included in the first carrier list and the second carrier list. For example, the resource pool index in the sidelink indication information d may be numbered based on the resource pools corresponding to all carriers included in the first carrier list, or the resource pool index in the sidelink indication information d may be numbered based on the resource pools corresponding to all carriers included in the second carrier list, or the resource pool index in the sidelink indication information d may be numbered based on the resource pools corresponding to some carriers in the first carrier list, or the resource pool index in the sidelink indication information d may be numbered based on the resource pools corresponding to some carriers in the second carrier list, or the resource pool index in the sidelink indication information d may be numbered based on the resource pools corresponding to some carriers in the first carrier list and the resource pools corresponding to some carriers in the second carrier list.

[0196] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0197] The resource pool indexes or resource pool identifiers corresponding to different carriers included in the first carrier list or the second carrier list are different; in other words, the resource pool indexes or resource pool identifiers corresponding to any carrier included in the first carrier list and any carrier included in the second carrier list are different; or, the resource pool indexes or resource pool identifiers corresponding to any two carriers included in the second carrier list are different.

[0198] S605: Terminal A uses the resources indicated by the sidelink indication information d to perform SL communication.

[0199] The resource indicated by the sidelink indication information d refers to the resource pool indicated by the resource pool index or resource pool identifier in the sidelink indication information d. Terminal A uses the resource indicated by the sidelink indication information d to perform SL communication or discovery.

[0200] The above process can be understood as, after receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list and the second carrier list.

[0201] In the above embodiment, by limiting the terminal to use the resource pools corresponding to the carriers included in the first carrier list and the second carrier list to process the sidelink resources obtained from the base station after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists and reasonably process the sidelink resources obtained from the network device, thereby improving the communication performance of SL CA. At the same time, the sidelink resource indication information includes a resource pool index or resource pool identifier, and limiting the resource pool indexes or resource pool identifiers corresponding to different carriers to be different, so that the sidelink resource indication information can clearly correspond to the resources of the resource pool under a certain carrier.

[0202] In other embodiments, the second carrier list includes carriers in the first carrier list, and the terminal may perform the communication method shown in FIG7 , which may be performed by a transmitting end (hereinafter referred to as terminal A). As shown in FIG7 , the communication method may include the following steps:

[0203] S701: Acquire a first carrier list and a second carrier list.

[0204] The second carrier list includes carriers in the first carrier list, that is, there is overlap or intersection between the carriers included in the second carrier list and the carriers included in the first carrier list.

[0205] Exemplarily, terminal A may obtain a first carrier list and a second carrier list through designated information. The designated message is any one of the following messages: RRC dedicated signaling, a system information block (SIB) message, and a pre-configuration message. The RRC dedicated signaling may include but is not limited to RRC configuration information, RRC reconfiguration information, and the like. In some embodiments, the terminal may obtain a first carrier list through first designated information, wherein the first designated message may be any one of the following messages: RRC configuration information, RRC reconfiguration information, SIB message, and pre-configuration message. The terminal may obtain a second carrier list through second designated information, wherein the second designated message may be any one of the following messages: RRC configuration information, RRC reconfiguration information, SIB message, and pre-configuration message.

[0206] The first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list corresponding to multi-carrier SL communication; or, the first carrier list is a carrier list corresponding to SL communication in R16 or R17, and the second carrier list is a carrier list corresponding to SL communication in R18 or R18+. R16 is the 16th public version of the protocol of the International Telecommunication Convention, R17 is the 17th public version of the protocol of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0207] S702: Perform SL communication based on the first carrier list or the second carrier list.

[0208] In some embodiments, before receiving the SL RRC reconfiguration completion message sent by terminal B, or in other words, before the carrier configuration signaling is completed, terminal A may perform SL communication based on the first carrier list. Exemplarily, terminal A may perform SL communication using the carriers included in the first carrier list; or terminal A may perform SL communication using the resource pool corresponding to the carriers included in the first carrier list.

[0209] After receiving the SL RRC reconfiguration completion message sent by terminal B, or in other words, after the carrier configuration signaling is completed, terminal A can perform SL communication based on the second carrier list. Exemplarily, terminal A can use the carriers included in the second carrier list to perform SL communication; or, terminal A can use the resource pools corresponding to the carriers included in the second carrier list to perform SL communication. For example, assuming that the second carrier list includes carrier 1, carrier 2, and carrier 3, terminal A can use carrier 1, carrier 2, and carrier 3 for SL communication, that is, terminal A can select SL resources for data transmission from carrier 1, carrier 2, and carrier 3; or, terminal A can use the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, the resource pool corresponding to carrier 3, and the resource pool corresponding to carrier 4 for SL communication, that is, terminal A can select SL resources for data transmission from the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, and the resource pool corresponding to carrier 3. The RRC reconfiguration completion message can be the first SL RRC reconfiguration completion message sent by terminal B to terminal A after terminal A establishes a SL communication link with terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to the SL RRC reconfiguration message including the SL carrier configuration.

[0210] In the above embodiment, by limiting that after receiving the SL RRC reconfiguration completion message, according to the inclusion relationship between the first carrier list and the second carrier list, when the second carrier list includes the carriers in the first carrier list, the terminal performs SL communication based on the second carrier list, so that the terminal can reasonably use the two carrier lists, and the communication performance of SL CA can be improved.

[0211] In some embodiments, terminal A may receive a CBR measurement configuration from a network device. The CBR measurement configuration may include a carrier index and a resource pool identifier, which is used to indicate a resource pool corresponding to a specified carrier. The resource pool identifier is used to indicate the resource pool corresponding to the CBR measurement configuration. The carrier index is used to indicate a carrier, which is the carrier corresponding to the resource pool corresponding to the CBR measurement configuration. The carrier index may be numbered based on the carriers included in the first carrier list and / or the second carrier list, and the resource pool identifier may include an identifier of the resource pool corresponding to each carrier indicated by the carrier index.

[0212] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0213] The identifiers of the resource pools corresponding to the different carriers included in the first carrier list or the second carrier list may be the same. The identifier of the resource pool corresponding to the first carrier included in the first carrier list and the identifier of the resource pool corresponding to the second carrier included in the second carrier list may be the same. That is, the identifiers of the resource pools corresponding to any two different carriers in the first carrier list and the second carrier list may be the same. Since the CBR measurement configuration indicates a resource pool corresponding to a specified carrier through the carrier index and the resource pool identifier, even if the identifiers of the resource pools corresponding to two different carriers are the same, it is possible to distinguish through the carrier index which carrier the resource pool indicated by the resource pool identifier corresponds to.

[0214] Terminal A may send a CBR measurement result to the network device based on the received CBR measurement configuration and the CBR measurement result. The CBR measurement result may include the carrier index and resource pool identifier included in the CBR measurement configuration.

[0215] In the above embodiment, the CBR measurement configuration and the CBR measurement result include the carrier index and the resource pool identifier, so that the resource pool identifiers corresponding to different carriers can be the same, and the current resource pool identifier definition can be reused.

[0216] In other embodiments, terminal A may receive sidelink indication information from a network device. The sidelink indication information may include a carrier index indicating resources for SL communication. Terminal A may use the resources indicated by the sidelink indication information for SL communication. The carrier index is used to indicate the carrier corresponding to the resources corresponding to the sidelink indication information. The carrier index may be numbered based on the carriers included in the first carrier list and / or the second carrier list.

[0217] In some optional embodiments, the sidelink indication information may include, in addition to the carrier index, a resource pool index or resource pool identifier; the resource pool index or resource pool identifier is used to indicate the resource pool corresponding to the resources indicated by the sidelink indication information. The resource pool index or resource pool identifier may include the index or identifier of the resource pool corresponding to each carrier indicated by the carrier index in the sidelink indication information a.

[0218] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0219] The indexes or resource pool identifiers of the resource pools corresponding to different carriers included in the first carrier list or the second carrier list may be the same. The index or resource pool identifier of the resource pool corresponding to the first carrier included in the first carrier list and the index or resource pool identifier of the resource pool corresponding to the second carrier included in the second carrier list may be the same. In other words, the indexes or resource pool identifiers of the resource pools corresponding to any two different carriers in the first carrier list and the second carrier list may be the same.

[0220] In the above embodiment, the sidelink indication information includes a carrier index, so that the resource pool index or resource pool identifier corresponding to different carriers can be the same, and the current resource pool index or resource pool identifier definition can be reused.

[0221] Several specific embodiments of the present application are described in detail below. In an optional embodiment, the interaction process between terminal A and the network device, as shown in FIG8 , may include the following steps:

[0222] S801: The network device sends a CBR measurement configuration e to terminal A.

[0223] Before receiving the SL RRC reconfiguration completion message, terminal A can obtain the CBR measurement configuration e from the network device. The CBR measurement configuration e may include a carrier index and a resource pool identifier, which is used to indicate a resource pool corresponding to a specified carrier. The resource pool identifier is used to indicate the resource pool corresponding to the CBR measurement configuration. The carrier index is used to indicate a carrier, which is the carrier corresponding to the resource pool corresponding to the CBR measurement configuration e. The carrier index can be numbered based on the carriers included in the first carrier list; the resource pool identifier may include the identifier of the resource pool corresponding to each carrier indicated by the above carrier index. For example, assuming that the first carrier list includes M carriers, the carrier index in the CBR measurement configuration e can use 0, 1, M-1 to indicate the M carriers included in the first carrier list. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0224] S802: Terminal A performs CBR measurement.

[0225] Terminal A can perform CBR measurements on each currently available SL resource to determine the CBR of each resource pool. For example, the SL resources currently available to terminal A include the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, and the resource pool corresponding to carrier 3. Terminal A can perform CBR measurements to determine the CBR of the resource pool corresponding to carrier 1, the CBR of the resource pool corresponding to carrier 2, and the CBR of the resource pool corresponding to carrier 3, respectively.

[0226] In some embodiments, step S802 may be performed before step S801.

[0227] S803: Terminal A sends the CBR measurement result e to the network device.

[0228] The CBR measurement result e may include the carrier index and resource pool identifier included in the CBR measurement configuration e. The carrier index may be numbered based on the carriers included in the first carrier list; the resource pool identifier may include the identifier of the resource pool corresponding to each carrier indicated by the carrier index. For example, assuming that the CBR measurement configuration e includes the carrier index of carrier 1 and the identifier of the resource pool corresponding to carrier 1, the CBR measurement result e may include the carrier index of carrier 1 and the identifier of the resource pool corresponding to carrier 1.

[0229] The network device receives the CBR measurement result e sent by terminal A, and schedules SL resources or provides SL resource configuration for terminal A according to the CBR of the resource pool included in the CBR measurement result e.

[0230] The above process can be understood as that, before receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list.

[0231] S804, terminal A receives the SL RRC reconfiguration completion message.

[0232] In some embodiments, when terminal A and terminal B perform SL communication, terminal A sends a SL RRC reconfiguration message to terminal B. After receiving the SL RRC reconfiguration message sent by terminal A, terminal B sends a SL RRC reconfiguration complete message to terminal A. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A during the process of establishing a SL communication link between terminal A and terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to a SL RRC reconfiguration message including an SL carrier configuration.

[0233] S805: The network device sends a CBR measurement configuration f to terminal A.

[0234] After receiving the SL RRC reconfiguration complete message, terminal A may obtain a CBR measurement configuration f from the network device. The CBR measurement configuration f may include a carrier index and a resource pool identifier. The carrier index may be numbered based on the carriers included in the second resource set. The second resource set may include a second carrier list.

[0235] In an optional embodiment, the carrier index in the CBR measurement configuration f may be numbered based on the carriers included in the second carrier list; the resource pool identifier may include the identifier of the resource pool corresponding to each carrier indicated by the above carrier index. For example, assuming that the second carrier list includes carrier 1, carrier 2, and carrier 3, the carrier index in the CBR measurement configuration f may use 0, 1, and 2 to indicate carrier 1, carrier 2, and carrier 3, respectively, and the resource pool identifier in the CBR measurement configuration f may include the identifier of the resource pool corresponding to carrier 1, the identifier of the resource pool corresponding to carrier 2, and the identifier of the resource pool corresponding to carrier 3. For another example, assuming that the second carrier list includes N carriers, the carrier index in the CBR measurement configuration f may use 0, 1, and N-1 to indicate the N carriers included in the second carrier list.

[0236] In another optional embodiment, the carrier indexes in the CBR measurement configuration f may also be numbered based on some carriers included in the second carrier list.

[0237] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0238] The identifiers of the resource pools corresponding to the different carriers included in the first carrier list or the second carrier list may be the same. The identifier of the resource pool corresponding to the first carrier included in the first carrier list and the identifier of the resource pool corresponding to the second carrier included in the second carrier list may be the same. That is, the identifiers of the resource pools corresponding to any two different carriers in the first resource set may be the same. Since the CBR measurement configuration f indicates a resource pool corresponding to a specified carrier through the carrier index and the resource pool identifier, even if the identifiers of the resource pools corresponding to two different carriers are the same, it is possible to distinguish which carrier the resource pool indicated by the resource pool identifier corresponds to by using the carrier index.

[0239] S806: Terminal A performs CBR measurement.

[0240] Terminal A can perform CBR measurements on each currently available SL resource to determine the CBR of each resource pool. For example, the SL resources currently available to terminal A include the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, and the resource pool corresponding to carrier 3. Terminal A can perform CBR measurements to determine the CBR of the resource pool corresponding to carrier 1, the CBR of the resource pool corresponding to carrier 2, and the CBR of the resource pool corresponding to carrier 3, respectively.

[0241] In some embodiments, step S806 may be performed before step S805.

[0242] S807: Terminal A sends the CBR measurement result f to the network device.

[0243] The CBR measurement result f may include the carrier index and resource pool identifier included in the CBR measurement configuration f. The carrier index may be numbered based on the carriers included in the second resource set, and the resource pool identifier may include the identifier of the resource pool corresponding to each carrier indicated by the carrier index in the CBR measurement configuration f. For example, assuming that the CBR measurement configuration f includes carrier 1 and the identifier of the resource pool corresponding to carrier 1, as well as carrier 2 and the identifier of the resource pool corresponding to carrier 2, the CBR measurement result f may include carrier 1 and the identifier of the resource pool corresponding to carrier 1, as well as carrier 2 and the identifier of the resource pool corresponding to carrier 2.

[0244] For another example, assuming that the CBR measurement configuration f includes the identifier of carrier 1 and the resource pool corresponding to carrier 1, the identifier of carrier 2 and the resource pool corresponding to carrier 2, and the identifier of carrier 3 and the resource pool corresponding to carrier 3, then the CBR measurement result f may include the identifier of carrier 1 and the resource pool corresponding to carrier 1, the identifier of carrier 2 and the resource pool corresponding to carrier 2, and the identifier of carrier 3 and the resource pool corresponding to carrier 3.

[0245] The network device receives the CBR measurement result f sent by terminal A, and schedules SL resources or provides SL resource configuration for terminal A according to the CBR of the resource pool included in the CBR measurement result f.

[0246] The above process can be understood as, after receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the second carrier list.

[0247] In the above embodiment, by limiting the terminal to use the carriers included in the second carrier list to receive the CBR measurement configuration and send the CBR measurement results for SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists, reasonably process the CBR measurement configuration and send the CBR measurement results, thereby improving the communication performance of SL CA. At the same time, the CBR measurement configuration and CBR measurement results include the carrier index, which can make the resource pool identifiers corresponding to different carriers the same, reusing the current resource pool identifier definition.

[0248] In another optional embodiment, the interaction process between terminal A and the network device, as shown in FIG9 , may include the following steps:

[0249] S901: The network device sends a CBR measurement configuration g to terminal A.

[0250] Before receiving the SL RRC reconfiguration completion message, terminal A may obtain the CBR measurement configuration g from the network device. The CBR measurement configuration g may include a resource pool identifier. The resource pool identifier is used to indicate the resource pool corresponding to the CBR measurement configuration. The resource pool identifier includes an identifier of the resource pool corresponding to the carrier included in the first carrier list. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0251] S902: Terminal A performs CBR measurement.

[0252] Terminal A can perform CBR measurements on each currently available SL resource to determine the CBR of each resource pool. For example, the SL resources currently available to terminal A include the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, and the resource pool corresponding to carrier 3. Terminal A can perform CBR measurements to determine the CBR of the resource pool corresponding to carrier 1, the CBR of the resource pool corresponding to carrier 2, and the CBR of the resource pool corresponding to carrier 3, respectively.

[0253] In some embodiments, step S902 may be performed before step S901.

[0254] S903: Terminal A sends the CBR measurement result g to the network device.

[0255] The CBR measurement result g may include the resource pool identifier included in the CBR measurement configuration g. The resource pool identifier includes the identifier of the resource pool corresponding to the carrier included in the first carrier list. For example, assuming that the CBR measurement configuration g includes the identifier of the resource pool corresponding to carrier 1, the CBR measurement result g may also include the identifier of the resource pool corresponding to carrier 1.

[0256] The network device receives the CBR measurement result g sent by terminal A, and schedules SL resources or provides SL resource configuration for terminal A according to the CBR of the resource pool included in the CBR measurement result g.

[0257] The above process can be understood as that, before receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list.

[0258] S904, terminal A receives the SL RRC reconfiguration completion message.

[0259] In some embodiments, when terminal A and terminal B perform SL communication, terminal A sends a SL RRC reconfiguration message to terminal B. After receiving the SL RRC reconfiguration message sent by terminal A, terminal B sends a SL RRC reconfiguration complete message to terminal A. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A during the process of establishing a SL communication link between terminal A and terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to a SL RRC reconfiguration message including an SL carrier configuration.

[0260] S905: The network device sends a CBR measurement configuration h to terminal A.

[0261] After receiving the SL RRC reconfiguration complete message, terminal A may obtain the CBR measurement configuration h from the network device. The CBR measurement configuration h may include a resource pool identifier. The resource pool identifier is used to indicate the resource pool corresponding to the CBR measurement configuration. The resource pool identifier includes an identifier of a resource pool corresponding to the carrier included in the second resource set, and the second resource set may include a second carrier list.

[0262] In an optional embodiment, the resource pool identifier in the CBR measurement configuration h may include an identifier of a resource pool corresponding to the carrier included in the second carrier list. For example, assuming that the second carrier list includes carrier 1, carrier 2, and carrier 3, the resource pool identifier in the CBR measurement configuration f may include an identifier of the resource pool corresponding to carrier 1, an identifier of the resource pool corresponding to carrier 2, and an identifier of the resource pool corresponding to carrier 3. Exemplarily, the resource pool identifiers in the CBR measurement configuration h may be numbered sequentially starting from 0 according to the resource pools corresponding to the carriers included in the second carrier list. For example, 0, 1, ..., Y-1 respectively indicate Y resource pools corresponding to the carriers included in the second carrier list. In another optional embodiment, the resource pool identifier in the CBR measurement configuration d may include identifiers of resource pools corresponding to some carriers in the second carrier list.

[0263] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0264] The identifiers of the resource pools corresponding to different carriers included in the first carrier list or the second carrier list are different; in other words, the identifiers of the resource pools corresponding to any carrier included in the first carrier list and any carrier included in the second carrier list are different; or, the identifiers of the resource pools corresponding to any two carriers included in the second carrier list are different.

[0265] S906: Terminal A performs CBR measurement.

[0266] Terminal A can perform CBR measurements on each currently available SL resource to determine the CBR of each resource pool. For example, the SL resources currently available to terminal A include the resource pool corresponding to carrier 1, the resource pool corresponding to carrier 2, and the resource pool corresponding to carrier 3. Terminal A can perform CBR measurements to determine the CBR of the resource pool corresponding to carrier 1, the CBR of the resource pool corresponding to carrier 2, and the CBR of the resource pool corresponding to carrier 3, respectively.

[0267] In some embodiments, step S906 may be performed before step S905.

[0268] S907: Terminal A sends the CBR measurement result h to the network device.

[0269] The CBR measurement result h may include the resource pool identifier included in the CBR measurement configuration h. The resource pool identifier includes the identifier of the resource pool corresponding to the carrier included in the second resource set. For example, assuming that the CBR measurement configuration h includes the identifier of the resource pool corresponding to carrier 1 and the identifier of the resource pool corresponding to carrier 2, the CBR measurement result h may also include the identifier of the resource pool corresponding to carrier 1 and the identifier of the resource pool corresponding to carrier 2.

[0270] For another example, assuming that the CBR measurement configuration h includes the identifier of the resource pool corresponding to carrier 1, the identifier of the resource pool corresponding to carrier 2, and the identifier of the resource pool corresponding to carrier 3, the CBR measurement result h may include the identifier of the resource pool corresponding to carrier 1, the identifier of the resource pool corresponding to carrier 2, and the identifier of the resource pool corresponding to carrier 3.

[0271] The network device receives the CBR measurement result h sent by terminal A, and schedules SL resources or provides SL resource configuration for terminal A according to the CBR of the resource pool included in the CBR measurement result h.

[0272] In the above embodiment, by limiting the terminal to use the resource pool included in the second carrier list to receive the CBR measurement configuration and send the CBR measurement result for SL communication after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists, reasonably process the CBR measurement configuration and send the CBR measurement result, thereby improving the communication performance of SL CA. At the same time, the CBR measurement configuration and CBR measurement result include a resource pool identifier, and limiting the resource pool identifiers corresponding to different carriers to be different, so that the CBR measurement configuration and CBR measurement result can clearly correspond to the resource pool under a certain carrier.

[0273] In another optional embodiment, the interaction process between terminal A and the network device, as shown in FIG10 , may include the following steps:

[0274] S1001, the network device sends sidelink indication information e to terminal A.

[0275] Before receiving the SL RRC reconfiguration completion message, terminal A can obtain side link indication information e from the network device. The side link resource indication information e can be DCI or SL configured grant information. The side link indication information e can include a carrier index. The carrier index is used to indicate the resources for SL communication, or in other words, the carrier index is used to indicate the carrier, which is the carrier corresponding to the resources indicated by the side link indication information e. The carrier index can be numbered based on the carriers included in the first carrier list. For example, assuming that the first carrier list includes M carriers, the carrier index can use 0, 1, and M-1 to indicate the M carriers included in the first carrier list. The first carrier list is a carrier list corresponding to single-carrier SL communication. Exemplarily, the first carrier list can be a carrier list corresponding to SL communication in R16 / R17. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only an SL configuration corresponding to one carrier.

[0276] In some embodiments, in addition to the carrier index, the sidelink indication information e may also include a resource pool index or resource pool identifier; the resource pool index or resource pool identifier is used to indicate the resource pool corresponding to the resources indicated by the sidelink indication information e. The resource pool index or resource pool identifier may include the index or identifier of the resource pool corresponding to each carrier indicated by the carrier index in the sidelink indication information e.

[0277] S1002, terminal A uses the resources indicated by the sidelink indication information e to perform SL communication.

[0278] The resource indicated by the sidelink indication information e refers to the carrier indicated by the carrier index of the sidelink indication information e, or the resource pool indicated by the resource pool index or resource pool identifier. Terminal A uses the resource indicated by the sidelink indication information e for SL communication or discovery.

[0279] The above process can be understood as that, before receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list.

[0280] S1003, terminal A receives the SL RRC reconfiguration completion message.

[0281] In some embodiments, when terminal A and terminal B perform SL communication, terminal A sends a SL RRC reconfiguration message to terminal B. After receiving the SL RRC reconfiguration message sent by terminal A, terminal B sends a SL RRC reconfiguration complete message to terminal A. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A during the process of establishing a SL communication link between terminal A and terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to a SL RRC reconfiguration message including an SL carrier configuration.

[0282] S1004: The network device sends sidelink indication information f to terminal A.

[0283] After receiving the SL RRC reconfiguration complete message, terminal A may obtain sidelink indication information f from the network device. Sidelink resource indication information f may be DCI or SL configured grant information. Sidelink indication information f may include a carrier index. The carrier index is used to indicate the resources for SL communication, or in other words, the carrier index is used to indicate the carrier corresponding to the resources indicated by the sidelink indication information b. The carrier index may be numbered based on the carriers included in the second resource set. The second resource set may include a second carrier list.

[0284] In an optional embodiment, the carrier indexes in the sidelink indication information f may be numbered based on the carriers included in the second carrier list. For example, assuming that the second carrier list includes carrier 1, carrier 2, and carrier 3, the carrier indexes in the sidelink indication information f may be 0, 1, and 2 to indicate carrier 1, carrier 2, and carrier 3, respectively. For another example, assuming that the second carrier list includes N carriers, the carrier indexes in the sidelink indication information f may be 0, 1, and N-1 to indicate the N carriers included in the second carrier list.

[0285] In another optional embodiment, the carrier index in the sidelink indication information f may also be numbered based on some carriers included in the second carrier list.

[0286] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0287] The resource pool indexes or resource pool identifiers corresponding to different carriers included in the first carrier list or the second carrier list may be the same. The resource pool index or resource pool identifier corresponding to the first carrier included in the first carrier list and the resource pool index or resource pool identifier corresponding to the second carrier included in the second carrier list may be the same. In other words, the resource pool indexes or resource pool identifiers corresponding to any two different carriers in the first resource set may be the same.

[0288] In some embodiments, in addition to the carrier index, the sidelink indication information f may also include a resource pool index or resource pool identifier. The resource pool index or resource pool identifier is used to indicate the resource pool corresponding to the resources indicated by the sidelink indication information f. The resource pool index or resource pool identifier may include the index or identifier of the resource pool corresponding to each carrier indicated by the carrier index in the sidelink indication information f.

[0289] S1005, terminal A uses the resources indicated by the sidelink indication information f to perform SL communication.

[0290] The resource indicated by the sidelink indication information f refers to the carrier indicated by the carrier index of the sidelink indication information f, or the resource pool indicated by the resource pool index or resource pool identifier. Terminal A uses the resource indicated by the sidelink indication information f for SL communication or discovery.

[0291] The above process can be understood as, after receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the second carrier list.

[0292] In the above embodiment, by limiting the terminal to use the carriers included in the second carrier list to process the sidelink resources obtained from the base station after receiving the SL RRC reconfiguration complete message, the terminal can reasonably use the two carrier lists and properly process the sidelink resources obtained from the network device, thereby improving the communication performance of SL CA. At the same time, the sidelink indication information includes a carrier index, which can ensure that the resource pool index or resource pool identifier corresponding to different carriers can be the same, and the resource pool index or resource pool identifier definition can be reused.

[0293] In another optional embodiment, the interaction process between terminal A and the network device, as shown in FIG11 , may include the following steps:

[0294] S1101, the network device sends sidelink indication information g to terminal A.

[0295] Before receiving the SL RRC reconfiguration completion message, terminal A may obtain sidelink indication information g from the network device. The sidelink resource indication information g may be DCI or SL configured grant information. The sidelink indication information g may include a resource pool index or a resource pool identifier. In some embodiments, the sidelink indication information g may include a resource pool index; in other embodiments, the sidelink indication information g may include a resource pool identifier. The resource pool index or resource pool identifier is used to indicate the resources for SL communication, or in other words, the resource pool index or resource pool identifier is used to indicate the resource pool, which is the resource pool corresponding to the resources indicated by the first sidelink resource indication information. The resource pool index is numbered based on the resource pool corresponding to the carrier included in the first carrier list, and the resource pool identifier includes the identifier of the resource pool corresponding to the carrier included in the first carrier list. The first carrier list is a carrier list corresponding to single-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0296] S1102, terminal A uses the resources indicated by the sidelink indication information g to perform SL communication.

[0297] The resource indicated by the sidelink indication information g refers to the resource pool indicated by the resource pool index or resource pool identifier in the sidelink indication information g. Terminal A uses the resource indicated by the sidelink indication information g for SL communication or discovery.

[0298] The above process can be understood as that, before receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the first carrier list.

[0299] S1103, terminal A receives the SL RRC reconfiguration completion message.

[0300] In some embodiments, when terminal A and terminal B perform SL communication, terminal A sends a SL RRC reconfiguration message to terminal B. After receiving the SL RRC reconfiguration message sent by terminal A, terminal B sends a SL RRC reconfiguration complete message to terminal A. The RRC reconfiguration complete message may be the first SL RRC reconfiguration complete message sent by terminal B to terminal A during the process of establishing a SL communication link between terminal A and terminal B. The SL RRC reconfiguration complete message may be a SL RRC reconfiguration complete message corresponding to a SL RRC reconfiguration message including an SL carrier configuration.

[0301] S1104: The network device sends sidelink indication information h to terminal A.

[0302] After receiving the SL RRC reconfiguration completion message, terminal A can obtain the side link indication information h from the network device. Resource pool index or resource pool identifier. In some embodiments, the side link indication information h may include a resource pool index; in other embodiments, the side link indication information h may include a resource pool identifier. The resource pool index or resource pool identifier is used to indicate the resources for SL communication, or in other words, the resource pool index or resource pool identifier is used to indicate the resource pool, which is the resource pool corresponding to the resource indicated by the side link resource indication information h. The resource pool index in the side link indication information h is numbered based on the resource pool corresponding to the carrier included in the second resource set, and the resource pool identifier in the side link indication information h includes the identifier of the resource pool corresponding to the carrier included in the second resource set. The second resource set may include a second carrier list.

[0303] In an optional embodiment, the resource pool index in the sidelink indication information h may be numbered based on the resource pools corresponding to the carriers included in the second carrier list. In another optional embodiment, the resource pool index in the sidelink indication information h may also be numbered based on the resource pools corresponding to some of the carriers included in the second carrier list.

[0304] The above-mentioned first carrier list is a carrier list corresponding to single-carrier SL communication, and the second carrier list is a carrier list supporting multi-carrier SL communication. Exemplarily, the first carrier list may be a carrier list corresponding to SL communication in R16 / R17, and the second carrier list may be a carrier list corresponding to SL communication in R18 or R18+. R16 is the protocol of the 16th public version of the International Telecommunication Convention, R17 is the protocol of the 17th public version of the International Telecommunication Convention, R18 refers to the R18 protocol in the International Telecommunication Convention, R18+ refers to the R18+ protocol in the International Telecommunication Convention, and the R18+ protocol may be a protocol version after the R18 protocol. In some embodiments, the first carrier list may include only one carrier, or the first carrier list may include only the SL configuration corresponding to one carrier.

[0305] The resource pool indexes or resource pool identifiers corresponding to different carriers included in the first carrier list or the second carrier list are different; in other words, the resource pool indexes or resource pool identifiers corresponding to any carrier included in the first carrier list and any carrier included in the second carrier list are different; or, the resource pool indexes or resource pool identifiers corresponding to any two carriers included in the second carrier list are different.

[0306] S1105, terminal A uses the resources indicated by the sidelink indication information h to perform SL communication.

[0307] The resource indicated by the sidelink indication information h refers to the resource pool indicated by the resource pool index or resource pool identifier in the sidelink indication information h. Terminal A uses the resource indicated by the sidelink indication information h for SL communication or discovery.

[0308] The above process can be understood as, after receiving the SL RRC reconfiguration completion message, terminal A performs SL communication based on the second carrier list.

[0309] In the above embodiment, by limiting the terminal to use the resource pool corresponding to the carrier included in the second carrier list to process the sidelink resources obtained from the base station after receiving the SL RRC reconfiguration completion message, the terminal can reasonably use the two carrier lists and reasonably process the sidelink resources obtained from the network device, thereby improving the communication performance of SL CA. At the same time, the sidelink resource indication information includes a resource pool index or resource pool identifier, and limiting the resource pool indexes or resource pool identifiers corresponding to different carriers to be different, so that the sidelink resource indication information can clearly correspond to the resources of the resource pool under a certain carrier.

[0310] Based on the same design concept as the above-mentioned method embodiment, this embodiment of the present application also provides a terminal. This terminal can be used to implement the functions of the above-mentioned method embodiment, thereby achieving the beneficial effects of the above-mentioned method embodiment. As shown in Figure 12, the terminal 1200 can include a message receiving module 1201 and a communication module 1202.

[0311] The message receiving module 1201 can be used to receive an SL RRC reconfiguration completion message. The communication module 1202 can be used to determine, based on the inclusion relationship between the first carrier list and the second carrier list, whether to use the first resource set or the second resource set for sidelink SL communication. The first resource set is a resource set determined based on the first carrier list and the second carrier list, and the second resource set is a resource set determined based on the second carrier list. The first carrier list is a carrier list corresponding to single-carrier SL communication; the second carrier list is a carrier list corresponding to multi-carrier SL communication.

[0312] In some embodiments, the communication module 1202 can be specifically used to use a first resource set for SL communication when the second carrier list does not include carriers in the first carrier list; wherein the first resource set includes the carriers included in the first carrier list and / or the resource pools corresponding to the carriers, and the carriers included in the second carrier list and / or the resource pools corresponding to the carriers.

[0313] In one embodiment, the communication module 1202 may be specifically configured to obtain a first channel busy ratio (CBR) measurement configuration from a network device. The first CBR measurement configuration includes a first carrier index and a first resource pool identifier. The first carrier index is numbered based on the carriers included in the first resource set; the first resource pool identifier includes an identifier of a resource pool corresponding to each carrier indicated by the first carrier index. A first CBR measurement result is sent to the network device, the first CBR measurement result including the first carrier index and the first resource pool identifier.

[0314] In another embodiment, the communication module 1202 may be specifically configured to obtain a second CBR measurement configuration from the network device. The second CBR measurement configuration includes a first resource pool identifier; the first resource pool identifier includes an identifier of a resource pool corresponding to a carrier included in the first resource set. The second CBR measurement result is sent to the network device, the second CBR measurement result including the first resource pool identifier.

[0315] In one embodiment, the communication module 1202 may be specifically configured to obtain first sidelink indication information from a network device and use resources indicated by the first sidelink indication information for SL communication. The first sidelink indication information includes a first carrier index, which is used to indicate resources for SL communication; the first carrier index is numbered based on carriers included in the first resource set.

[0316] In another embodiment, the communication module 1202 may be specifically configured to obtain second sidelink indication information from a network device and use the resources indicated by the second sidelink indication information for SL communication. The second sidelink indication information includes a first resource pool index or a first resource pool identifier; the first resource pool index or the first resource pool identifier is used to indicate the resources for SL communication; the first resource pool index is numbered based on the resource pool corresponding to the carrier included in the first resource set; and the first resource pool identifier includes an identifier of the resource pool corresponding to the carrier included in the first resource set.

[0317] In other embodiments, the communication module 1202 can be specifically used to use a second resource set for SL communication when the second carrier list includes carriers in the first carrier list; the second resource set includes the carriers included in the second carrier list and / or the resource pool corresponding to the carriers.

[0318] In one embodiment, the communication module 1202 may be specifically configured to obtain a third CBR measurement configuration from the network device; the third CBR measurement configuration includes a second carrier index and a second resource pool identifier; the second carrier index is numbered based on the carriers included in the second resource set; and the second resource pool identifier includes an identifier of a resource pool corresponding to each carrier indicated by the second carrier index. The third CBR measurement result is sent to the network device, the third CBR measurement result including the second carrier index and the second resource pool identifier.

[0319] In another embodiment, the communication module 1202 may be specifically configured to obtain a fourth CBR measurement configuration from the network device, wherein the fourth CBR measurement configuration includes a second resource pool identifier, wherein the second resource pool identifier includes an identifier of a resource pool corresponding to a carrier included in the second resource set, and send a fourth CBR measurement result to the network device, wherein the fourth CBR measurement result includes the second resource pool identifier.

[0320] In one embodiment, the communication module 1202 can be specifically used to obtain third side link indication information from the network device, and use the resources indicated by the third side link indication information to perform SL communication; the third side link indication information includes a second carrier index, and the second carrier index is used to indicate the resources for SL communication; the second carrier index is numbered based on the carrier included in the second resource set.

[0321] In another embodiment, the communication module 1202 can be specifically used to obtain fourth side link indication information from the network device, and use the resources indicated by the fourth side link indication information for SL communication; the fourth side link indication information includes a second resource pool index or a second resource pool identifier; the second resource pool index or the second resource pool identifier is used to indicate the resources for SL communication; the second resource pool index is numbered based on the resource pool corresponding to the carrier included in the second resource set; the second resource pool identifier includes the identifier of the resource pool corresponding to the carrier included in the second resource set.

[0322] The functional modules in the embodiments of the present application may be integrated into a processor, or each module may exist physically separately, or two or more modules may be integrated into a single module. The above-mentioned integrated modules may be implemented in the form of hardware or software functional units.

[0323] Based on the same design concept as the above-mentioned method embodiment, the embodiment of the present application also provides a terminal. As shown in Figure 13, the terminal 1300 may include a receiving module 1301 and a sending module 1302. The receiving module 1301 can be used to obtain a channel busy ratio (CBR) measurement configuration from a network device; the CBR measurement configuration includes a carrier index and a resource pool identifier; the carrier index is used to indicate a target carrier, and the resource pool identifier is used to indicate a target resource pool in a resource pool corresponding to the target carrier. The sending module 1302 can be used to send a CBR measurement result to the network device, and the CBR measurement result includes the above-mentioned carrier index and the above-mentioned resource pool identifier.

[0324] In some embodiments, the resource pools corresponding to the first carrier and the second carrier have the same identifier, wherein the first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or, the first carrier and the second carrier are any two carriers in the second carrier list.

[0325] The functional modules in the embodiments of the present application may be integrated into a processor, or each module may exist physically separately, or two or more modules may be integrated into a single module. The above-mentioned integrated modules may be implemented in the form of hardware or software functional units.

[0326] Based on the same design concept as the above-mentioned method embodiment, the embodiment of the present application also provides a terminal. As shown in Figure 14, the terminal 1400 may include an information acquisition module 1401 and a communication module 1402. The information acquisition module 1401 may be configured to obtain sidelink indication information from a network device, wherein the sidelink indication information includes a carrier index, which is used to indicate resources for SL communication. The communication module 1402 may be configured to perform SL communication using the resources indicated by the sidelink indication information.

[0327] In some embodiments, the resource pools corresponding to the first carrier and the second carrier have the same identifier, wherein the first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or, the first carrier and the second carrier are any two carriers in the second carrier list.

[0328] The functional modules in the embodiments of the present application may be integrated into a processor, or each module may exist physically separately, or two or more modules may be integrated into a single module. The above-mentioned integrated modules may be implemented in the form of hardware or software functional units.

[0329] Based on the same technical concept as the above method embodiment, the present application also provides a terminal. The terminal may be terminal A shown in Figure 1. The terminal can be used to implement the functions of the above method embodiment, thereby achieving the beneficial effects of the above method embodiment.

[0330] In some embodiments, the structure of the terminal 1500 can be as shown in Figure 15, including a processor 1501 and a memory 1502 connected to the processor 1501. The processor 1501 and the memory 1502 can be connected to each other via a bus. The processor 1501 can be a general-purpose processor, such as a microprocessor, or other conventional processors. The bus can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, etc.

[0331] Among them, the memory 1502 can be used to store software programs and modules, and the processor 1501 executes various functional applications and data processing of the terminal 1500 by running the software programs and modules stored in the memory 1502, such as the communication method provided in the embodiment of the present application.

[0332] The memory 1502 may primarily include a program storage area and a data storage area. The program storage area may store an operating system, at least one application program, and the like; the data storage area may be used to store user data, etc. Furthermore, the memory 1502 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state memory device.

[0333] The processor 1501 in the terminal 1500 is used to run the computer instructions or programs stored in the memory 1502 to perform the functions of any of the above method embodiments.

[0334] In some embodiments, processor 1501 may include one or more processing units. Different processing units may be independent devices or integrated into one or more processors. Processor 1501 may also include a controller that can generate operation control signals based on instruction opcodes and timing signals to control instruction fetching and execution.

[0335] In one embodiment, the terminal 1500 may further include a communication module, and the communication module is used to communicate with other devices in the network.

[0336] It is understood that the structures illustrated in the embodiments of this application do not constitute specific limitations on network devices. In other embodiments of this application, the chip may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0337] Based on the same technical concept as the above-mentioned method embodiment, an embodiment of the present application further provides a communication system. The communication system may be the communication system shown in FIG1 , and the communication system may include two terminals performing SL communication. In some embodiments, the communication system may also include a network device, such as the network device 100 in FIG1 .

[0338] The present application also provides a computer program product comprising computer-executable instructions. In one embodiment, the computer-executable instructions are used to enable a computer to perform the functions of the above method embodiment.

[0339] Computer-executable instructions can be stored in a computer-readable storage medium. The present application also provides a computer-readable storage medium having executable instructions stored therein. In one embodiment, the computer-executable instructions are used to cause a computer to perform the functions of the above method embodiment.

[0340] The computer-readable storage medium provided in the embodiments of the present application may be a random access memory (RAM), a flash memory, 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), a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of computer-readable storage medium known in the art.

[0341] Computer-executable instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium such as a floppy disk, hard disk, or magnetic tape; an optical medium such as a digital video disc (DVD); or a semiconductor medium such as a solid-state drive.

[0342] In the various embodiments of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, including a series of steps or units. The method, system, product or device is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0343] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations thereof may be made without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are intended to be illustrative only of the solutions defined by the appended claims and are to be construed as covering any and all modifications, variations, combinations or equivalents within the scope of the present application.

[0344] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: The method comprises: Receiving a sidelink radio resource control SL RRC reconfiguration completion message; According to the inclusion relationship between the first carrier list and the second carrier list, it is determined whether to use the first resource set or the second resource set for side link SL communication; the first resource set is a resource set determined based on the first carrier list and the second carrier list; the second resource set is a resource set determined based on the second carrier list.

2. The method according to claim 1, characterized in that The first carrier list is a carrier list corresponding to single-carrier SL communication; the second carrier list is a carrier list corresponding to multi-carrier SL communication.

3. The method according to claim 1 or 2, characterized in that: The determining, according to the inclusion relationship between the first carrier list and the second carrier list, to use the first resource set or the second resource set for sidelink SL communication includes: If the second carrier list does not include the carriers in the first carrier list, a first resource set is used for SL communication; the first resource set includes the carriers included in the first carrier list and / or the resource pools corresponding to the carriers, and the carriers included in the second carrier list and / or the resource pools corresponding to the carriers.

4. The method according to claim 3, characterized in that The adopting the first resource set to perform SL communication includes: Acquire a first channel busy ratio CBR measurement configuration from a network device; the first CBR measurement configuration includes a first carrier index and a first resource pool identifier; the first carrier index is numbered based on the carriers included in the first resource set; the first resource pool identifier includes an identifier of a resource pool corresponding to each carrier indicated by the first carrier index; A first CBR measurement result is sent to the network device, where the first CBR measurement result includes the first carrier index and the first resource pool identifier.

5. The method according to claim 3, characterized in that: The adopting the first resource set to perform SL communication includes: Acquire a second CBR measurement configuration from a network device; the second CBR measurement configuration includes a first resource pool identifier; the first resource pool identifier includes an identifier of a resource pool corresponding to a carrier included in the first resource set; A second CBR measurement result is sent to the network device, where the second CBR measurement result includes the first resource pool identifier.

6. The method according to claim 3, characterized in that: The adopting the first resource set to perform SL communication includes: Acquire first sidelink indication information from a network device; the first sidelink indication information includes a first carrier index, the first carrier index is used to indicate a resource for SL communication; the first carrier index is numbered based on the carrier included in the first resource set; The resources indicated by the first sidelink indication information are used for SL communication.

7. The method according to claim 3, characterized in that The adopting the first resource set to perform SL communication includes: Acquire second sidelink indication information from a network device; the second sidelink indication information includes a first resource pool index or a first resource pool identifier; the first resource pool index or the first resource pool identifier is used to indicate a resource for SL communication; the first resource pool index is numbered based on a resource pool corresponding to a carrier included in the first resource set; the first resource pool identifier includes an identifier of a resource pool corresponding to a carrier included in the first resource set; The resources indicated by the second sidelink indication information are used for SL communication.

8. The method according to claim 1 or 2, characterized in that: The determining, according to the inclusion relationship between the first carrier list and the second carrier list, to use the first resource set or the second resource set for sidelink SL communication includes: If the second carrier list includes carriers in the first carrier list, a second resource set is used for SL communication; the second resource set includes the carriers included in the second carrier list and / or the resource pools corresponding to the carriers.

9. The method according to claim 8, characterized in that The adopting the second resource set to perform SL communication includes: Acquire a third CBR measurement configuration from the network device; the third CBR measurement configuration includes a second carrier index and a second resource pool identifier; the second carrier index is numbered based on the carrier included in the second resource set; the second resource pool identifier includes an identifier of a resource pool corresponding to each carrier indicated by the second carrier index; A third CBR measurement result is sent to the network device, where the third CBR measurement result includes the second carrier index and the second resource pool identifier.

10. The method according to claim 8, characterized in that The adopting the second resource set to perform SL communication includes: Acquire a fourth CBR measurement configuration from the network device; the fourth CBR measurement configuration includes a second resource pool identifier; the second resource pool identifier includes an identifier of a resource pool corresponding to a carrier included in the second resource set; Sending a fourth CBR measurement result to the network device, where the fourth CBR measurement result includes the second resource pool identifier.

11. The method according to claim 8, characterized in that The adopting the second resource set to perform SL communication includes: Acquire third sidelink indication information from the network device; the third sidelink indication information includes a second carrier index, the second carrier index is used to indicate a resource for SL communication; the second carrier index is numbered based on the carrier included in the second resource set; The resources indicated by the third sidelink indication information are used for SL communication.

12. The method according to claim 8, characterized in that The adopting the second resource set to perform SL communication includes: Acquire fourth sidelink indication information from the network device; the fourth sidelink indication information includes a second resource pool index or a second resource pool identifier; the second resource pool index or the second resource pool identifier is used to indicate a resource for SL communication; the second resource pool index is numbered based on the resource pool corresponding to the carrier included in the second resource set; the second resource pool identifier includes an identifier of the resource pool corresponding to the carrier included in the second resource set; The resources indicated by the fourth sidelink indication information are used for SL communication.

13. The method according to claim 4, 6, 9 or 11, characterized in that The identifiers of the resource pools corresponding to the first carrier and the second carrier are the same; The first carrier is any carrier in the first carrier list, and the second carrier is any carrier in the second carrier list; or, the first carrier and the second carrier are any two carriers in the second carrier list.

14. The method according to claim 5, 7, 10 or 12, characterized in that The carriers included in the first carrier list and the carriers included in the second carrier list have corresponding resource pool identifiers different from each other; or any two carriers included in the second carrier list have corresponding resource pool identifiers different from each other.

15. The method according to any one of claims 1 to 14, characterized in that: Before receiving the side link radio resource control SL RRC reconfiguration completion message, the method further includes: The first carrier list and the second carrier list are obtained through a designated message; the designated message is any one of the following messages: radio resource control RRC configuration information, RRC reconfiguration information, system message block SIB message, pre-configuration message.

16. A terminal, characterized in that: The terminal comprises a module for executing the method according to any one of claims 1 to 15.

17. A terminal, characterized in that: The terminal includes a memory and a processor, wherein the memory stores a computer program; the processor is configured to execute the computer program stored in the memory to implement the method according to any one of claims 1 to 15.

18. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to make a computer execute the method according to any one of claims 1 to 15.

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