Communication method and apparatus

Abstract

The present application relates to a communication method and apparatus. In the method, a first candidate resource set in a resource selection window is determined based on a plurality of resource pools, allowing for a larger number of candidate resources in the first candidate resource set. Therefore, when a terminal device performs resource exclusion on the first candidate resource set, the number of the remaining candidate resources in the first candidate resource set may also be larger, that is, the number of candidate resources in a second candidate resource set is larger, thereby ensuring that the number of the candidate resources in the second candidate resource set is not less than X% of the total number of resources in the resource selection window. In this way, the problem of increased probability of resource conflict caused by increasing an RSRP threshold can be reduced, thereby reducing the resource conflict problem. That is, the problem of conflicts between resources selected by the terminal device and resources selected by other terminal devices is reduced, ensuring the reliability of sidelink transmission.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application with application number 202311104899.7 filed with the State Intellectual Property Office of China on August 30, 2023, and priority to the Chinese patent application with the invention name “A Communication Method and Device”, all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0003] In sidelink (SL) communication scenarios, a terminal device can determine one or more resources based on autonomous mode (also known as Mode 2) before sending data, thereby using one of the one or more resources to send data. However, resource determination in Mode 2 is likely to result in resource conflicts.

[0004] Summary of the Invention

[0005] The present application provides a communication method and apparatus that can reduce resource conflict issues.

[0006] In a first aspect, a communication method is provided. The method can be executed by a terminal device, or by a module (e.g., a processor, chip, or chip system) applied to the terminal device, or by a logical node, logical module, or software that implements all or part of the terminal device's functions. In this communication method, a first candidate resource set within a resource selection window can be determined; the first candidate resource set is determined based on N resource pools, where N is an integer greater than 1; thereby, resources can be excluded from the first candidate resource set to obtain a second candidate resource set; at least one candidate resource in the second candidate resource set is used for sidelink transmission.

[0007] It can be seen that in the above embodiment, the first candidate resource set within the resource selection window is determined based on multiple resource pools, which makes the number of candidate resources in the first candidate resource set greater. Therefore, after the terminal device excludes resources from the first candidate resource set, the number of remaining candidate resources in the first candidate resource set can also be greater, that is, the number of candidate resources in the second candidate resource set is greater, thereby ensuring that the number of candidate resources in the second candidate resource set is not less than X% of the total number of resources in the resource selection window. In this way, the problem of increased probability of resource conflicts caused by raising the RSRP threshold can be reduced, thereby reducing the problem of resource conflicts. That is, the problem of conflicts between the resources selected by the terminal device and the resources selected by other terminal devices is reduced, thereby ensuring the reliability of sidelink transmission.

[0008] In combination with the first aspect, optionally, the N resource pools are located on the same bandwidth part (BWP); or, at least two resource pools among the N resource pools are located on different BWPs.

[0009] In combination with the first aspect, optionally, the N resource pools are located on the same carrier; or, at least two resource pools among the N resource pools are located on different carriers.

[0010] In combination with the first aspect, optionally, the first candidate resource set includes a first candidate resource, the first candidate resource is located on at least two resource pools, at least two BWPs or at least two carriers, and resource exclusion is performed on the first candidate resource set to obtain a second candidate resource set, including: excluding the first candidate resource from the first candidate resource set to obtain the second candidate resource set.

[0011] It can be seen that in the above embodiment, the terminal device excludes cross-resource pool, cross-BWP or cross-carrier resources from the first candidate resource set, which can reduce the resource conflict problem. For example, some terminal devices are configured with two carriers, such as carrier 1 and carrier 2. Other terminal devices are configured with carrier 1. If the subchannels included in the first candidate resource in the first candidate resource set are located on carrier 1 and carrier 2, that is, the first candidate resource spans two carriers. Suppose a terminal device configured with two carriers sends an SCI on a subchannel located on carrier 2. In this way, the terminal device configured with carrier 1 cannot receive the SCI, let alone know the resources reserved by the SCI. This causes these terminal devices to not exclude the resources reserved by the SCI, and then select the same resource, resulting in a transmission conflict.

[0012] In combination with the first aspect, optionally, the method further includes: excluding, from the second candidate resource set, periodic reservation resources corresponding to resources in the resource selection window and not listened to in the listening window, to obtain a third candidate resource set.

[0013] In combination with the first aspect, optionally, the method also includes: excluding the periodic reservation resources corresponding to the resources in the resource selection window and not listened to in the listening window from the first candidate resource set to obtain a fourth candidate resource set; excluding the first candidate resource from the first candidate resource set to obtain a second candidate resource set, including: excluding the first candidate resource from the fourth candidate resource set to obtain the second candidate resource set.

[0014] In a second aspect, a communication method is provided, which can be executed by a terminal device, or by a module (such as a processor, chip, or chip system, etc.) applied to the terminal device, or by a logical node, logical module, or software that can realize all or part of the terminal device functions. In this communication method, at least two candidate resource sets within the resource selection window can be determined, and the at least two candidate resource sets include a first candidate resource set and a second candidate resource set; the first candidate resource set is determined based on K resource pools, K is an integer greater than 0; the second candidate resource set is determined based on L resource pools, L is an integer greater than 0, and the K resource pools are different from the L resource pools; thereby, based on the first reference signal received power (RSRP) threshold, the first candidate resource set and the second candidate resource set can be excluded respectively to obtain a third candidate resource set and a fourth candidate resource set; and then, based on the third candidate resource set and the fourth candidate resource set, a fifth candidate resource set can be determined, and at least one candidate resource in the fifth candidate resource set is used for sidelink transmission.

[0015] It can be seen that in the above embodiment, the resource selection window can include at least two candidate resource sets, and the candidate resource sets can be determined based on at least one resource pool. This increases the number of candidate resources in the resource selection window. Therefore, after the terminal device excludes the candidate resources in the resource selection window, the number of candidate resources remaining in the resource selection window can also be greater, thereby ensuring that the number of candidate resources in the resource selection window is not less than X% of the total number of resources in the resource selection window. In this way, the problem of increased resource conflict probability caused by raising the RSRP threshold can be reduced, and the resource conflict problem can be further reduced. That is, the problem of conflict between the resources selected by the terminal device and the resources selected by other terminal devices is reduced, and the reliability of sidelink transmission is guaranteed. At the same time, by performing resource exclusion on different candidate resource sets in the resource selection window in parallel, the efficiency of resource exclusion can be improved.

[0016] In combination with the second aspect, optionally, the K resource pools and the L resource pools are located on the same part of the bandwidth BWP; or, the BWP where the K resource pools are located is different from the BWP where the L resource pools are located; or, the BWP where the K resource pools are located is partly the same as the BWP where the L resource pools are located.

[0017] In combination with the second aspect, optionally, the K resource pools and the L resource pools are located on the same carrier; or, the carrier where the K resource pools are located is different from the carrier where the L resource pools are located; or, the carrier where the K resource pools are located is partially the same as the carrier where the L resource pools are located.

[0018] In combination with the second aspect, optionally, the fifth candidate resource set includes the third candidate resource set and the fourth candidate resource set.

[0019] It can be seen that in the above embodiment, because the fifth candidate resource set includes the third candidate resource set and the fourth candidate resource set, the terminal device can have a wider range of choices when selecting resources for sidelink transmission, thereby reducing the problem of conflicts between the resources selected by the terminal device and the resources selected by other terminal devices, and ensuring the reliability of the sidelink transmission.

[0020] In combination with the second aspect, optionally, when the first ratio is greater than the first threshold and the second ratio is less than the first threshold, or when both the first ratio and the second ratio are greater than the first threshold and the first ratio is greater than the second ratio, the fifth candidate resource set is the third candidate resource set; wherein the first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in the first candidate resource set, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in the second candidate resource set; or, the first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in at least two candidate resource sets, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in at least two candidate resource sets.

[0021] It can be seen that in the above embodiment, the fifth candidate resource set is the candidate resource set with the largest number of candidate resources in the third candidate resource set and the fourth candidate resource set (such as the third candidate resource set), which enables the terminal device to have a wider range of choices when selecting resources for side link transmission, thereby reducing the problem of conflicts between the resources selected by the terminal device and the resources selected by other terminal devices, and ensuring the reliability of the side link transmission.

[0022] In combination with the second aspect, optionally, when the first ratio is less than the first threshold and the second ratio is greater than the first threshold, or when both the first ratio and the second ratio are greater than the first threshold and the first ratio is less than the second ratio, the fifth candidate resource set is the fourth candidate resource set.

[0023] It can be seen that in the above embodiment, the fifth candidate resource set is the candidate resource set with the largest number of candidate resources in the third candidate resource set and the fourth candidate resource set (such as the fourth candidate resource set), which enables the terminal device to have a wider range of choices when selecting resources for side link transmission, thereby reducing the problem of conflicts between the resources selected by the terminal device and the resources selected by other terminal devices, and ensuring the reliability of the side link transmission.

[0024] In combination with the second aspect, optionally, based on the third candidate resource set and the fourth candidate resource set, a fifth candidate resource set is determined, including: when the first ratio and the second ratio are both less than the first threshold, adjusting the first RSRP threshold to the second RSRP threshold, and the second RSRP threshold is greater than the first RSRP threshold; based on the second RSRP threshold, excluding resources from the first candidate resource set and the second candidate resource set respectively to obtain a sixth candidate resource set and a seventh candidate resource set; based on the sixth candidate resource set and the seventh candidate resource set, determining the fifth candidate resource set.

[0025] It can be seen that in the above embodiment, when the number of candidate resources in the third candidate resource set and the number of candidate resources in the fourth candidate resource set are both insufficient, the RSRP threshold can be increased to re-exclude resources, so that the fifth candidate resource set can be determined based on the new candidate resource sets (such as the sixth candidate resource set and the seventh candidate resource set). In this way, it can be ensured that the number of candidate resources in the resource selection window is not less than X% of the total number of resources in the resource selection window.

[0026] In a third aspect, a communication method is provided, which can be executed by a first terminal device, or by a module (such as a processor, chip, or chip system) applied to the first terminal device, or by a logical node, logical module, or software that can realize all or part of the functions of the first terminal device. In the communication method, a physical sidelink shared channel (PSSCH) can be sent on a first resource; thereby, the PSSCH can be retransmitted on a second resource; wherein, at least two sidelink feedback resources associated with the PSSCH are respectively located on at least two resource pools, and the interval between the first resource and the second resource is determined according to a first value and a second value; the first value is determined according to the time interval between a time unit in the first resource and a time unit of the last sidelink feedback resource associated with the PSSCH; or, the first value is determined according to a third value and a fourth value, the third value is determined according to the time interval between a time unit in the first resource and a time unit of the first sidelink feedback resource associated with the PSSCH, and the fourth value is determined according to the time interval between a time unit of the first sidelink feedback resource associated with the PSSCH and a time unit of the last sidelink feedback resource associated with the PSSCH. The second value is determined according to the time for processing the sidelink feedback information, where the sidelink feedback information is the sidelink feedback information corresponding to the PSSCH transmitted for the first time.

[0027] It can be seen that in the above embodiment, when at least two sidelink feedback resources associated with the PSSCH are respectively located in at least two resource pools, a more accurate interval between the initially transmitted resources (i.e., the first resources) and the retransmitted resources (i.e., the second resources) is defined, thereby ensuring reliable data transmission.

[0028] In combination with the third aspect, optionally, at least two resource pools are located on the same BWP, or at least two resource pools are located on different BWPs.

[0029] In combination with the third aspect, optionally, at least two resource pools are located on the same carrier; or, at least two resource pools are located on different carriers.

[0030] In combination with the third aspect, optionally, the first value is determined based on the time interval between a time unit in the first resource and a time unit of the last sidelink feedback resource associated with the PSSCH, including: the first value is determined based on the time interval between the end position of the last time unit in the first resource and the starting position of the first time unit of the last sidelink feedback resource associated with the PSSCH.

[0031] In combination with the third aspect, optionally, the third value is determined based on the time interval between a time unit in the first resource and a time unit of the first side link feedback resource associated with the PSSCH, including: the third value is determined based on the time interval between the end position of the last time unit in the first resource and the starting position of the first time unit of the first side link feedback resource associated with the PSSCH.

[0032] In combination with the third aspect, optionally, the fourth value is determined based on the time interval between a time unit of the first sidelink feedback resource associated with the PSSCH and a time unit of the last sidelink feedback resource associated with the PSSCH, including: the fourth value is determined based on the time interval between the end position of the last time unit of the first sidelink feedback resource associated with the PSSCH and the starting position of the first time unit of the last sidelink feedback resource associated with the PSSCH.

[0033] In a fourth aspect, a communication method is provided, which can be executed by a second terminal device, or by a module (such as a processor, chip, or chip system) applied to the second terminal device, or by a logical node, logical module, or software that can implement all or part of the functions of the second terminal device. In the communication method, a PSSCH can be received on a first resource; thereby, a retransmission of the PSSCH can be received on a second resource; wherein, at least two sidelink feedback resources associated with the PSSCH are respectively located on at least two resource pools, and the interval between the first resource and the second resource is determined according to a first value and a second value; the first value is determined according to the time interval between a time unit in the first resource and a time unit of the last sidelink feedback resource associated with the PSSCH; or, the first value is determined according to a third value and a fourth value, the third value is determined according to the time interval between a time unit in the first resource and a time unit of the first sidelink feedback resource associated with the PSSCH, and the fourth value is determined according to the time interval between a time unit of the first sidelink feedback resource associated with the PSSCH and a time unit of the last sidelink feedback resource associated with the PSSCH. The second value is determined according to the time for processing the sidelink feedback information, where the sidelink feedback information is the sidelink feedback information corresponding to the PSSCH transmitted for the first time.

[0034] It can be seen that in the above embodiment, when at least two sidelink feedback resources associated with the PSSCH are respectively located in at least two resource pools, a more accurate interval between the initially transmitted resources (i.e., the first resources) and the retransmitted resources (i.e., the second resources) is defined, thereby ensuring reliable data transmission.

[0035] In combination with the fourth aspect, optionally, at least two resource pools are located on the same BWP, or at least two resource pools are located on different BWPs.

[0036] In combination with the fourth aspect, optionally, at least two resource pools are located on the same carrier; or, at least two resource pools are located on different carriers.

[0037] In combination with the fourth aspect, optionally, the first value is determined based on the time interval between a time unit in the first resource and a time unit of the last sidelink feedback resource associated with the PSSCH, including: the first value is determined based on the time interval between the end position of the last time unit in the first resource and the starting position of the first time unit of the last sidelink feedback resource associated with the PSSCH.

[0038] In combination with the fourth aspect, optionally, the third value is determined based on the time interval between a time unit in the first resource and a time unit of the first side link feedback resource associated with the PSSCH, including: the third value is determined based on the time interval between the end position of the last time unit in the first resource and the starting position of the first time unit of the first side link feedback resource associated with the PSSCH.

[0039] In combination with the fourth aspect, optionally, the fourth value is determined based on the time interval between a time unit of the first sidelink feedback resource associated with the PSSCH and a time unit of the last sidelink feedback resource associated with the PSSCH, including: the fourth value is determined based on the time interval between the end position of the last time unit of the first sidelink feedback resource associated with the PSSCH and the starting position of the first time unit of the last sidelink feedback resource associated with the PSSCH.

[0040] In a fifth aspect, a communication device is provided, comprising a unit or module for implementing the method described in any one of aspects 1 to 4. The communication device may be a terminal device or a network device, or a module of the terminal device or network device (e.g., a processor, chip, or chip system), or a logical node, logical module, or software that can implement all or part of the functions of the terminal device or network device.

[0041] In a sixth aspect, a communication device is provided, comprising at least one processor; wherein the at least one processor is configured to execute any of the methods described in any one of the first to fourth aspects. The communication device may be a terminal device or a network device, or a module of a terminal device or a network device (such as a processor, a chip, or a chip system, etc.), or a logical node, a logical module, or software that can implement all or part of the functions of the terminal device or the network device. At least one processor may execute a computer program or instruction in a memory so that the above method is executed. The memory may be included in the communication device or may be located outside the communication device. In addition, the communication device may further include an interface.

[0042] In a seventh aspect, a communication system is provided, the communication system comprising a terminal device for executing the method as described in any one of the first aspect or the second aspect and other terminal devices communicating with the terminal device.

[0043] In an eighth aspect, a communication system is provided, the communication system comprising a first terminal device and a second terminal device; the first terminal device is used to execute the method as described in any one of the third aspects; the second terminal device is used to execute the method as described in any one of the fourth aspects.

[0044] In a ninth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed, the computer executes any one of the methods described in any one of the first to fourth aspects.

[0045] In a tenth aspect, a computer program product is provided, the computer program product comprising: a computer program code, and when the computer program code is executed by a computer, the computer executes any one of the methods described in any one of the first to fourth aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The following is a brief introduction to the drawings required for describing the embodiments.

[0047] FIG1 is a basic architecture of a communication system provided in an embodiment of the present application;

[0048] FIG2 is a schematic diagram of carrier aggregation;

[0049] FIG3 is a schematic diagram of physical time slots and logical time slots;

[0050] FIG4 is a schematic diagram of a subchannel including at least one resource block staggered in the frequency domain;

[0051] FIG5 is a schematic diagram of resource exclusion;

[0052] FIG6 is a flow chart of a communication method provided in an embodiment of the present application;

[0053] FIG7 is a schematic diagram of cross-carrier resource allocation according to an embodiment of the present application;

[0054] FIG8 is a flow chart of another communication method provided in an embodiment of the present application;

[0055] FIG9 is a flow chart of another communication method provided in an embodiment of the present application;

[0056] FIG10 is a flow chart of another communication method provided in an embodiment of the present application;

[0057] FIG11 is a flow chart of another communication method provided in an embodiment of the present application;

[0058] FIG12 is a schematic diagram of a time interval between one symbol and another symbol provided in an embodiment of the present application;

[0059] FIG13 is a schematic diagram of an interval between initially transmitted resources and retransmitted resources provided in an embodiment of the present application;

[0060] FIG14 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0061] FIG15 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. In the embodiments of the present application, the terms "system" and "network" can be used interchangeably. Unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship. For example, A / B can represent A or B. "And / or" in this application is only a description of 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. A and B can be singular or plural. In addition, in the description of this application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and / or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be one or more. In addition, to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish between network elements and identical or similar items with substantially the same functions. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and that terms such as "first" and "second" do not necessarily limit differences.

[0063] References to "one embodiment" or "some embodiments" in the embodiments of the present application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0064] The following specific implementation methods further describe in detail the objectives, technical solutions and beneficial effects of the present application. It should be understood that the following are only specific implementation methods of the present application and are not intended to limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the present application should be included in the scope of protection of the present application.

[0065] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0066] It should be understood that the technical solutions of the embodiments of the present application can be applied to long term evolution (LTE) architecture, fifth generation mobile communication technology (5G), wireless local area networks (WLAN) systems, vehicle to everything (V2X) communication systems, LTE-vehicle (LTE-V), vehicle to vehicle (V2V), vehicle networking, machine type communications (MTC), etc. The technical solutions of the embodiments of the present application can also be applied to other future communication systems, such as 6G communication systems, etc. In future communication systems, the functions may remain the same, but the names may change.

[0067] The following describes the infrastructure of the communication system provided by the embodiment of the present application. The communication system provided by the present application may include multiple terminal devices. Optionally, the communication system may also include one or more network devices.

[0068] The following is an exemplary explanation using the system architecture shown in Figure 1. As shown in Figure 1, the communication system includes a terminal device 10 and one or more terminal devices communicating with the terminal device 10 (such as the terminal device 20 in Figure 1).

[0069] Optionally, the communication system may further include one or more network devices (not shown in FIG1 ). For example, terminal device 10 and terminal device 20 may be located within the coverage of the same network device; or, terminal device 10 and terminal device 20 may be located within the coverage of different network devices; or, terminal device 10 is located within the coverage of the network device, and terminal device 20 is located outside the coverage of the network device (out of coverage); or, terminal device 10 is located outside the coverage of the network device, and terminal device 20 is located within the coverage of the network device; or, both terminal device 10 and terminal device 20 are located outside the coverage of the network device, and the present invention is not limited here.

[0070] It should be noted that the number of terminal devices and network devices in Figure 1 is only for illustration and should not be considered as a specific limitation of the present application. The terminal devices and network devices involved in the system architecture are described in detail below.

[0071] 1. Terminal Equipment

[0072] A terminal device is an entity on the user side that is used to receive signals, or send signals, or both receive and send signals. The terminal device is used to provide one or more of voice services and data connectivity services to the user. The terminal device may be a device that includes wireless transceiver functions and can cooperate with network equipment to provide communication services to the user. Specifically, the terminal device may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, terminal, wireless communication device, user agent, user device or road side unit (RSU). The terminal device may also be a drone, an Internet of Things (IoT) device, a station (ST) in a wireless local area network (WLAN), a cellular phone, a smart phone, a cordless phone, a wireless data card, a tablet computer, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a laptop computer, a machine type communication (MTC) terminal, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device (also referred to as a wearable smart device), a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in remote medical care, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in a smart grid, a transportation security system, or a similar device. The terminal device may also be a terminal in a 5G system or a terminal in a next-generation communication system, which is not limited in the embodiments of the present application.

[0073] The embodiments of this application do not limit the device form factor of the terminal device. The device used to implement the functions of the terminal device can be the terminal device; it can also be a device that supports the terminal device to implement the functions, such as a chip system. The device can be installed in the terminal device or used in conjunction with the terminal device. In the embodiments of this application, the chip system can be composed of a chip or include a chip and other discrete components.

[0074] 2. Network Equipment

[0075] A network device is an entity on the network side that is used to send signals, receive signals, or both send and receive signals. A network device can be a device deployed in a radio access network (RAN) to provide wireless communication functions for terminal devices.

[0076] In one possible scenario, a network device may be a device with base station functionality, such as an evolved NodeB (eNodeB), a transmitting and receiving point (TRP), a transmitting point (TP), a next-generation NodeB (gNB), a next-generation base station in a 6G mobile communication system, an integrated access and backhaul (IAB) node, or non-terrestrial network equipment in an NTN, i.e., equipment that can be deployed on a high-altitude platform or satellite. A network device may be a transmission reception point (TRP), a base station, or various forms of control nodes, such as a network controller or a wireless controller. Specifically, network devices can include various forms of macro base stations, micro base stations (also known as small cells) in heterogeneous network (HetNet) scenarios, relay stations, access points (APs), radio network controllers (RNCs), node Bs (NBs), base station controllers (BSCs), base transceiver stations (BTSs), home base stations (e.g., home evolved node Bs, or home node Bs, HNBs), baseband units (BBUs) and remote radio units (RRUs) in distributed base station scenarios, transmission points (TRPs), transmitting points (TPs), mobile switching centers, and the like. They can also be antenna panels for base stations. A control node can connect to multiple base stations and configure resources for multiple terminals covered by these base stations. In systems using different wireless access technologies, the names of devices with base station functionality may vary. For example, it can be a gNB in ​​5G, or a network-side device in a network after 5G, or a network device in a future evolved public land mobile (communication) network (public land mobile network, PLMN) network, or a device that performs base station functions in device-to-device (D2D) communication, machine-to-machine (M2M) communication, and vehicle network communication, etc. This application does not limit the specific name of the network device.The network equipment may also be an open access network (O-RAN or ORAN), a baseband pool (BBU pool) and RRU under a cloud radio access network (CRAN), etc.

[0077] All or part of the functions of the network device in this application may also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (such as a cloud platform). The network device in this application may also be a logical node, logical module, or software that can implement all or part of the network device functions.

[0078] In another possible scenario, multiple network devices collaborate to assist the terminal device in achieving wireless access, and different network devices respectively implement part of the functions of the base station. For example, the network device may include a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU may be set separately, or may be included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). It is understandable that the network device may be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into a network device in the access network RAN, or the CU may be divided into a network device in the core network CN, without limitation here.

[0079] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, this application uses CU, CU-CP, CU-UP, DU and RU as examples for description. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0080] In the embodiments of the present application, the form of the network device is not limited. The device used to implement the function of the network device can be a network device; it can also be a device that can support the network device to implement the function, such as a chip system. The device can be installed in the network device or used in conjunction with the network device.

[0081] In order to facilitate understanding of the contents of this solution, some of the terms involved in the embodiments of this application are explained below to facilitate understanding by those skilled in the art. This part is only for ease of understanding and cannot be regarded as a specific limitation of this application.

[0082] 1. Carrier (CC)

[0083] The carrier is a continuous frequency range that complies with the system regulations. This frequency range can be determined by the center frequency of the carrier (denoted as the carrier frequency) and the bandwidth of the carrier.

[0084] In order to increase data transmission rate and reduce latency, carrier aggregation (CA) technology has been proposed. Carrier aggregation refers to the aggregation of multiple contiguous or non-contiguous carriers into a larger bandwidth. Generally, based on the frequency bands where the aggregated carriers are located, carrier aggregation can be divided into intra-band carrier aggregation (intra-band CA) and inter-band carrier aggregation (inter-band CA). Intra-band carrier aggregation can be divided into intra-band contiguous carrier aggregation and intra-band non-contiguous carrier aggregation. As shown in 2-1 of Figure 2, aggregating contiguous carrier 1 and carrier 2 on frequency band 1 can be called intra-band contiguous carrier aggregation. As shown in 2-2 of Figure 2, aggregating non-contiguous carrier 1 and carrier 2 on frequency band 1 can be called intra-band non-contiguous carrier aggregation. As shown in 2-3 of Figure 2, aggregating carrier 1 on frequency band 1 and carrier 2 on frequency band 2 can be called inter-band carrier aggregation.

[0085] Optionally, the carriers for carrier aggregation in this application may be located in at least one of the authorized frequency band, the unauthorized frequency band and the dedicated frequency band. The carriers located in the unauthorized frequency band may perform listen before talk (LBT). This application does not limit the LBT process.

[0086] A carrier may include at least one BWP. A BWP may include at least one resource pool. A resource pool may refer to a resource collection consisting of one or more of time domain resources, frequency domain resources, code domain resources, spatial domain resources, power domain resources, and the like. Alternatively, a resource pool may include at least one candidate resource, which may include one or more of time domain resources, frequency domain resources, code domain resources, spatial domain resources, and power domain resources.

[0087] The time domain resources may include at least one time unit. Among them, the time unit may be a symbol, a time slot, a mini-slot, a subframe or a frame, etc. In NR, the duration of a frame is 10 milliseconds (ms), and each frame is divided into 10 subframes, each subframe is 1ms long. Each subframe is divided into several time slots: when the cyclic prefix (CP) is a normal cyclic prefix (NCP), each time slot consists of 14 symbols; when the cyclic prefix is ​​an extended cyclic prefix (ECP), each time slot consists of 12 symbols. Of course, with the evolution of communication technology, the number of symbols included in a time slot may also be other values, which is not limited in this application. The symbols involved in this application may be orthogonal frequency-division multiplexing (OFDM) symbols.

[0088] Optionally, at least one time unit may be continuous or discrete in time. Optionally, at least one time unit may be logically continuous. As shown in FIG3 , time slots 0 to 13 are continuous in time, and such time slots may be referred to as physical slots. Assume that time slots 0, 2, 4, and 6 belong to a resource pool. In other words, physical time slots 0, 2, 4, and 6 belong to the resource pool. Physical time slots 0, 2, 4, and 6 correspond to time slots 0', 1', 2', and 3' of the resource pool, respectively. Therefore, it can be considered that the resource pool contains continuous time slots, that is, time slots 0' to 3' are logically continuous time slots in terms of the resource pool, and such logically continuous but potentially discontinuous time slots may be referred to as logical slots.

[0089] Optionally, the frequency domain resources may include at least one frequency domain unit. A frequency domain unit may be at least one resource element (RE), at least one resource block (RB), or at least one subchannel. A subchannel may also be referred to as a subband, and this application does not limit the name. The following description uses a subchannel as an example.

[0090] Optionally, a subchannel may include at least one resource block that is continuous or interlaced in the frequency domain. Interlaced resource blocks are a form of discrete resource blocks. For example, the multiple resource blocks contained in a subchannel are interlaced, which means that any two adjacent resource blocks contained in the subchannel are separated by at least one resource block that does not belong to the subchannel. As shown in Figure 4, subchannel 0 includes resource block 0, resource block 2, resource block 4, and resource block 6; subchannel 1 includes resource block 1, resource block 3, resource block 5, and resource block 7. It can be seen that any two adjacent resource blocks contained in subchannel 0 are separated by a resource block belonging to subchannel 1. Similarly, any two adjacent resource blocks contained in subchannel 1 are separated by a resource block belonging to subchannel 0. In this way, the multiple resource blocks contained in subchannel 0 and subchannel 1 can be considered to be interlaced. In addition, subchannel 3 includes resource blocks 8 to resource blocks 11. In this way, the multiple resource blocks contained in subchannel 3 can be considered to be continuous.

[0091] The code domain resource may include, for example, at least one of the following: a sequence, a cyclic shift, etc. The sequence may refer to, for example, a demodulation reference signal (DMRS) sequence, and the cyclic shift may refer to, for example, a cyclic shift of a DMRS.

[0092] Generally, the resource pool may include candidate resources for transmitting physical channels. The physical channels may include one or more of a physical sidelink control channel (PSCCH), a PSSCH, a physical sidelink feedback channel (PSFCH), and the like.

[0093] The PSCCH can be used to carry sidelink control information (SCI). SCI is divided into first-level SCI and second-level SCI. Using the PSCCH to carry SCI can mean that the PSCCH is used to carry first-level SCI. Second-level SCI can be carried on the PSSCH.

[0094] Optionally, the PSSCH may also be used to carry at least one of sidelink data, sidelink channel state information (CSI) feedback information, and the like. Sidelink data may refer to a transport block (TB), a data packet, or a media access control (MAC) protocol data unit (PDU), and the like. Sidelink CSI feedback information may include at least one of a precoding matrix indicator (PMI), a rank indication (RI), and a channel quality indicator (CQI).

[0095] Generally, when the PSSCH indicates hybrid automatic repeat request (HARQ) feedback, the terminal device can receive the PSFCH on the sidelink feedback resource associated with the PSSCH. The PSFCH can carry sidelink feedback information. If the terminal device successfully decodes the sidelink data on the PSSCH, the sidelink feedback information may include an acknowledgement (ACK); if the terminal device fails to decode the sidelink data on the PSSCH, the sidelink feedback information may include a negative acknowledgement (NACK).

[0096] Optionally, the sidelink feedback resource may be understood as PSFCH, PSFCH transmission, or PSFCH resource, which is not limited herein. Optionally, the sidelink feedback resource may refer to a symbol and a resource block.

[0097] Optionally, the PSSCH can be associated with at least one sidelink feedback resource. Multiple sidelink feedback resources have a sequential relationship in the time domain. For example, assuming that the three sidelink feedback resources are sidelink feedback resource 1 to sidelink feedback resource 3, sidelink feedback resource 1 precedes sidelink feedback resource 2 in the time domain, and sidelink feedback resource 2 precedes sidelink feedback resource 3 in the time domain.

[0098] It should be pointed out that the sidelink feedback resources mentioned in this application refer to resources used to transmit sidelink feedback information. For example, a sidelink feedback resource associated with the PSSCH is used to transmit sidelink feedback information for the initial transmission of the PSSCH, and another sidelink feedback resource associated with the PSSCH is used to transmit sidelink feedback information for the retransmission of the PSSCH. Optionally, the terminal device can retransmit the PSSCH once or multiple times. Therefore, for a certain retransmission of the PSSCH, the terminal device can receive the corresponding sidelink feedback information on the corresponding sidelink feedback resource.

[0099] 2. Resource exclusion of mode2

[0100] Assume that the terminal device triggers resource selection in time slot n, where n is a positive integer. Resource exclusion in mode 2 may include at least one of the following steps:

[0101] Step 1: The terminal device determines the resource selection window [n+T1, n+T2]. T1 and T2 are selected by the terminal device within a certain range. T1 is greater than or equal to 0 and less than or equal to An integer. Subcarrier spacing μ SL For the specific correspondence, please refer to Table 1. 2min When the packet delay budget (PDB) is less than the packet delay budget (PDB), T2 is greater than or equal to T 2min , and is less than or equal to an integer of PDB. 2min When T2 is greater than or equal to PDB, T2 is an integer less than or equal to PDB.

[0102] Table 1

[0103] Step 2: The terminal device determines the listening window Among them, T0 is configured by high-level parameters. Subcarrier spacing μ SL For details, see Table 2. The listening window can also be called the perception window, resource listening window, or resource perception window. This application does not limit the names. The following uses the listening window as an example for explanation. The listening window is located before the resource selection window in the time domain and does not overlap with the resource selection window. For example, if the terminal device triggers resource selection in time slot n, the resource selection window is located after time slot n in the time domain, and the listening window is located before time slot n in the time domain.

[0104] Table 2

[0105] Step 3: The terminal device determines the RSRP threshold Th(p i ,pj ), Th(p i ,p j ) and the priority of the data to be sent by the terminal device prio TX The priority level indicated by the SCI (such as the first level SCI, etc.) received by the terminal device is prio RX For example, Th(p i ,p j ) is the prioRX+(prioTX-1)*8th threshold in the RSRP threshold set configured for the resource pool. i ,p j ) is used to determine whether the corresponding resources need to be excluded in subsequent steps. For example, if the energy value of the relevant resource detected is greater than the RSRP threshold value, the reserved resource corresponding to the resource needs to be excluded. Optionally, the terminal device can receive multiple SCIs, and the priorities indicated by different SCIs can be different. Therefore, the number of RSRP thresholds can be multiple. The sizes of different RSRP thresholds can be different. The following is an example of a terminal device receiving an SCI.

[0106] Step 4: The terminal device initializes the available resource set S A , where S A It can be understood as all candidate resources in the resource selection window included in a resource pool. The following is an example of a resource pool including time domain resources and frequency domain resources (referred to as time-frequency resources). Optionally, the candidate resources in the resource selection window are a time slot and L subCH consecutive subchannels, L subCH Is a positive integer.

[0107] Step 5: The terminal device receives data from S A The following resources are excluded: all periodic reserved time-frequency resources corresponding to the time slots that are not listened to in the resource selection window and the listening window. Among them, the time slots that are not listened to can be understood as the time slots in which the terminal device sends data, so no resource listening is performed on the time slots. The periodic reserved time-frequency resources can be understood as the time-frequency resources corresponding to the time slots that are integer multiples of the time slot intervals that are not listened to. All periodic reserved time-frequency resources can be understood as the periodic reserved time-frequency resources corresponding to all periods configured in the high-level "sl-ResourceReservePeriodList".

[0108] Step 6. In S A After excluding the above resources, the number of remaining time-frequency resources is less than X% of the total number of resources in the resource selection window. The terminal device re-executes the initialization of step 4 (i.e., determines the new S A) and skip step 5. Optionally, setting the ratio is mainly used to ensure that the terminal device has sufficient time and frequency resources for side link transmission. Optionally, X is configured by the resource pool and is also related to prio TX For example, X can be 20, 35, or 50.

[0109] Step 7. The terminal device continues to A Exclude time-frequency resources. Specifically: the terminal device receives the first-level SCI and decodes it successfully. The time-frequency resources reserved by the first-level SCI can be used to send PSSCH, detect the energy of the DMRS in the PSSCH, and obtain the RSRP measurement result. When the RSRP measurement result is higher than the RSRP threshold determined in step 3, exclude the periodic time-frequency resources corresponding to the time-frequency resources occupied by the first-level SCI and exclude the periodic reserved time-frequency resources indicated in the first-level SCI within the resource selection window. For example, the retransmission resources and periodic reservation resources indicated by the first-level SCI. The retransmission resources can be indicated by the time resource indication value (TRIV) and the frequency resource indication value (FRIV) in the first-level SCI.

[0110] For example, as shown in FIG5 , resource A is in the listening window, and the SCI received on resource A indicates the reserved resource, such as resource B, and the SCI also indicates the period of resource A and resource B. The terminal device performs RSRP measurement. If the RSRP measurement results on resource A and resource B are higher than the RSRP threshold in step 3, the terminal device considers that resource A and resource B are occupied, and therefore, the terminal device stops the SCI from the listening window. A Exclude resource A and resource B. Resource A corresponds to resource C in the resource selection window, that is, resource C is the periodic reservation resource of resource A. Similarly, resource D is the periodic reservation resource of resource B. If the RSRP measurement results of resource C and resource D are higher than the RSRP threshold in step 3, the terminal device continues to select from S A Exclude resources C and D.

[0111] Step 8. In S A If the number of remaining time-frequency resources in the resource selection window is less than X% of the total number of resources in the resource selection window, the terminal device increases the RSRP threshold determined in step 3 (by 3dB each time) and executes step 7 based on the new RSRP threshold until S A After the number of remaining time-frequency resources in the resource selection window is not less than X% of the total number of resources in the resource selection window, the resource set S obtained after the above steps can be A Report to the upper layer of the terminal device, such as the MAC layer. The upper layer of the terminal device can AThe final resource selection is done in to determine the resources used for sidelink transmission.

[0112] Optionally, the above steps 1 to 8 are performed by the physical (PHY) layer of the terminal device.

[0113] Generally speaking, mode 2 resource exclusion is to exclude resources from a single resource pool. Therefore, after the resource exclusion is completed, the remaining resources in a single resource pool may not be enough. For example, in step 8 above, S A The number of remaining time-frequency resources in the resource selection window is less than X% of the total number of resources in the resource selection window. This will increase the RSRP threshold determined in step 3 and return to step 7 above. After the RSRP threshold is increased, it can be guaranteed that the number of remaining resources in a single resource pool is no less than X% of the total number of resources in the resource selection window. However, this may cause the remaining resources in a single resource pool to include resources reserved by other terminal devices, increasing the probability of resource conflicts. In general, the resource determination method of mode 2 is likely to have the problem of resource conflicts. Based on this, the present application provides the embodiments shown in Figures 6 or 10 to solve this problem.

[0114] The embodiments of the present application are described in detail below. Specifically, the terminal device mentioned below may be the terminal device involved in Figure 1, and the network device mentioned below may be the network device involved in Figure 1. It should be pointed out that the message name between the network elements or the name of the parameters in the message in the following embodiment is only an example, and other names may be used in the specific implementation, and the embodiments of the present application do not specifically limit this. The processing performed by the single execution subject (terminal device or network device) shown in the embodiment of the present application may also be divided into executions by multiple execution subjects, and these execution subjects may be logically and / or physically separated. For example, the processing performed by the network device may be divided into executions by at least one of the CU, DU and RU.

[0115] As shown in FIG6 , a communication method is provided in an embodiment of the present application, which includes but is not limited to the following steps:

[0116] 601. The terminal device determines a first candidate resource set within a resource selection window; the first candidate resource set is determined based on N resource pools, where N is an integer greater than 1.

[0117] Optionally, N resource pools can be implemented in the following ways:

[0118] 1. N resource pools are located on the same BWP.

[0119] 2. At least two of the N resource pools are located on different BWPs. Optionally, at least two of the N resource pools are located on different BWPs, which can be understood as: different resource pools in the N resource pools are located on different BWPs. Alternatively, some of the N resource pools are located in the same BWP, while others are located in different BWPs.

[0120] For example, assume N is 4, meaning there are four resource pools, namely resource pool 1 through resource pool 4. Case 1: Resource pools 1 through 4 are located on BWPs 1 through 4, respectively. It can be seen that resource pools 1 through 4 are located on different BWPs. Case 2: Resource pools 1 and 2 are located on BWP 1, while resource pools 3 and 4 are located on BWP 2. It can be seen that resource pools 1 and 3 are located on different BWPs, resource pools 2 and 4 are located on different BWPs, resource pools 1 and 2 are located on the same BWP, and resource pools 3 and 4 are located on the same BWP. Case 3: Resource pool 1 is located on BWP 1, resource pool 2 is located on BWP 2, and resource pools 3 and 4 are located on BWP 3. It can be seen that resource pools 1 and 2 are located on different BWPs, resource pool 1, resource pools 3, and resource pool 4 are located on different BWPs, resource pool 2, resource pools 3, and resource pool 4 are located on different BWPs, and resource pool 3 and resource pool 4 are located on the same BWP.

[0121] Optionally, the N resource pools may be part or all of the resource pools on at least two of all the BWPs configured for the terminal device. For example, assume that N is 4, i.e., 4 resource pools. The number of BWPs configured for the terminal device is 4, such as BWP1 to BWP4. The 4 resource pools are respectively located on the 4 BWPs; or, two of the 4 resource pools are respectively located on BWP1 and BWP2, and the remaining resource pools of the 4 resource pools are respectively located on BWP3 and BWP4; or, two of the 4 resource pools are both located on BWP1, and the remaining resource pools of the 4 resource pools are all located on BWP2.

[0122] 3. N resource pools are located on the same carrier. For example, assume that N is 3, that is, there are three resource pools, namely resource pool 1, resource pool 2, and resource pool 3. Resource pools 1 to 3 are all located on carrier 1, that is, resource pools 1 to 3 are all located on the same carrier.

[0123] 4. At least two of the N resource pools are located on different carriers. Optionally, at least two of the N resource pools are located on different carriers, which can be understood as: different resource pools in the N resource pools are located on different carriers. Alternatively, some of the N resource pools are located on the same carrier, while others are located on different carriers.

[0124] For example, assume that N is 4, that is, there are 4 resource pools, namely resource pool 1 to resource pool 4. First case: resource pool 1 to resource pool 4 are located on carrier 1 to carrier 4, respectively. It can be seen that resource pool 1 to resource pool 4 are all located on different carriers. Second case: resource pool 1 and resource pool 2 are located on carrier 1, and resource pool 3 and resource pool 4 are located on carrier 2. It can be seen that resource pool 1 and resource pool 3 are located on different carriers, resource pool 2 and resource pool 4 are located on different carriers, resource pool 1 and resource pool 2 are located on the same carrier, and resource pool 3 and resource pool 4 are located on the same carrier. Third case: resource pool 1 is located on carrier 1, resource pool 2 is located on carrier 2, and resource pool 3 and resource pool 4 are located on carrier 3. It can be seen that resource pool 1 and resource pool 2 are located on different carriers, resource pool 1 and resource pool 3 and resource pool 4 are located on different carriers, resource pool 2 and resource pool 3 and resource pool 4 are located on different carriers, resource pool 3 and resource pool 4 are located on the same carrier.

[0125] Optionally, the N resource pools may be part or all of the resource pools on at least two carriers among all the carriers configured for the terminal device. For example, assume that N is 4, that is, 4 resource pools. The number of carriers configured for the terminal device is 4, such as carrier 1 to carrier 4. The 4 resource pools are respectively located on the 4 carriers; or, two of the 4 resource pools are respectively located on carrier 1 and carrier 2, and the remaining resource pools of the 4 resource pools are respectively located on carrier 3 and carrier 4; or, two of the 4 resource pools are both located on carrier 1, and the remaining resource pools of the 4 resource pools are all located on carrier 2.

[0126] Optionally, N resource pools are located on the same carrier, which can also be described as follows: the BWPs in which each resource pool in the N resource pools is located can belong to the same carrier. For example, assume that N is 4, i.e., there are four resource pools, namely resource pool 1 to resource pool 4. Resource pools 1 to resource pool 4 are located on BWP1 to BWP4, respectively, and BWP1 to BWP4 all belong to carrier 1. At least two resource pools in the N resource pools are located on different carriers, which can also be described as follows: at least two BWPs in the BWPs in which each resource pool in the N resource pools is located can belong to different carriers. For example, assume that N is 4, i.e., there are four resource pools, namely resource pool 1 to resource pool 4. Resource pools 1 to resource pool 4 are located on BWP1 to BWP4, respectively, BWP1 and BWP2 belong to carrier 1, and BWP3 and BWP4 belong to carrier 2. Alternatively, BWP1 belongs to carrier 1, BWP2 belongs to carrier 2, and BWP3 and BWP4 belong to carrier 3.

[0127] Optionally, the first candidate resource set is determined based on N resource pools, which can be understood as: the first candidate resource set includes all candidate resources in the N resource pools. It should be noted that the candidate resources in a certain candidate resource set (such as the first candidate resource set, etc.) mentioned in this application can be, for example, a time slot and LsubCH sub-channels, L subCH is a positive integer. Optionally, the L included in any candidate resource in the candidate resource set subCH The sub-channels may be continuous or discontinuous. Or, the L included in some candidate resources in the candidate resource set subCH The sub-channels are continuous, and the other part of the candidate resources in the candidate resource set includes L subCH The sub-channels are not continuous.

[0128] For example, assume that the candidate resources in the first candidate resource set are one time slot and three subchannels. As shown in Figure 7, the number of candidate resources in the first candidate resource set is 5. Among them, subchannel 2 and subchannel 3 included in the candidate resources on time slot n+2 are both located on carrier 1, and subchannel n+1 included in the candidate resources on time slot n+2 is located on carrier 2. Therefore, it can be considered that the candidate resources on time slot n+2 are located on carrier 1 and carrier 2, respectively. It can also be said that the three subchannels included in the candidate resources on time slot n+2 are not continuous. Similarly, the three subchannels included in the candidate resources on time slot n+3 are not continuous. The candidate resources on time slot n, time slot n+1 or time slot n+4 are all located on one carrier. It can also be said that the three subchannels included in the candidate resources on time slot n are continuous.

[0129] Optionally, the first candidate resource set may include the first candidate resource. Optionally, the first candidate resource set may also include other candidate resources in addition to the first candidate resource. Specifically:

[0130] 1. The first candidate resource is located on at least two carriers. Optionally, the other candidate resources may be located on the same carrier. For example, the carrier on which the other candidate resources are located is the same as one of the carriers on which the first candidate resource is located. Alternatively, the carrier on which the other candidate resources are located is different from any carrier on which the first candidate resource is located.

[0131] 2. The first candidate resource is located on at least two BWPs. For example, the first candidate resource consists of one time slot and three subchannels. Subchannel 1 of the three subchannels is located on BWP 1, and subchannel 2 and subchannel 3 of the three subchannels are located on BWP 2. Therefore, the first candidate resource can be considered to be located on two BWPs. Alternatively, other candidate resources can be located on the same BWP. For example, the BWP where the other candidate resources are located is the same as one of the BWPs where the first candidate resource is located. Alternatively, the BWP where the other candidate resources are located is different from any of the BWPs where the first candidate resource is located.

[0132] 3. The first candidate resource is located in at least two of the N resource pools. For example, the first candidate resource is a time slot and three subchannels. Subchannel 1 of the three subchannels is located in resource pool 1, and subchannels 2 and 3 of the three subchannels are located in resource pool 2. Therefore, the first candidate resource can be considered to be located in two resource pools.

[0133] Optionally, the number of the first candidate resources may be one or more, and the number of the other candidate resources may be one or more.

[0134] Optionally, before step 601, steps 1 to 3 may be performed. The resource selection window in step 601 may refer to the resource selection window in step 1 above.

[0135] 602. The terminal device excludes resources from the first candidate resource set to obtain a second candidate resource set; at least one candidate resource in the second candidate resource set is used for sidelink transmission.

[0136] Optionally, step 602 may include: the terminal device excludes the first candidate resource from the first candidate resource set to obtain the second candidate resource set. That is, the terminal device excludes cross-resource pool, cross-BWP or cross-carrier resources from the first candidate resource set, which can reduce the resource conflict problem. Exemplarily, some terminal devices are configured with two carriers, such as carrier 1 and carrier 2. Other terminal devices are configured with carrier 1. If the subchannels included in the first candidate resource in the first candidate resource set are located on carrier 1 and carrier 2, that is, the first candidate resource spans two carriers. Suppose a terminal device configured with two carriers sends an SCI on a subchannel located on carrier 2. In this way, the terminal device configured with carrier 1 cannot receive the SCI, let alone know the resources reserved by the SCI. This causes these terminal devices to not exclude the resources reserved by the SCI, and then select the same resource, resulting in a transmission conflict.

[0137] Optionally, the method may further include one of the following implementations, specifically:

[0138] ①. The terminal device excludes the periodic reservation resources corresponding to the resources not listened to in the listening window in the resource selection window from the second candidate resource set, and obtains the third candidate resource set. The listening window can refer to the listening window in step 2 above, which is not described in detail here. Optionally, after obtaining the third candidate resource set, the third candidate resource set can be further excluded. For details, please refer to steps 6 to 8 above, which are not described in detail here. That is, the S in step 6 above is removed. A The third candidate resource set is replaced to exclude resources, and finally a candidate resource set reported to a higher layer of the terminal device can be obtained.

[0139] ②. The terminal device excludes the periodic reservation resources corresponding to the resources in the resource selection window and not listened to in the listening window from the first candidate resource set to obtain a fourth candidate resource set; the terminal device excludes the first candidate resource from the first candidate resource set to obtain a second candidate resource set, including: the terminal device excludes the first candidate resource from the fourth candidate resource set to obtain the second candidate resource set.

[0140] Wherein, the terminal device excludes the first candidate resource from the fourth candidate resource set to obtain the second candidate resource set, which may include, for example: when the number of candidate resources in the fourth candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set, the terminal device excludes the first candidate resource from the fourth candidate resource set to obtain the second candidate resource set. For example, the terminal device receives the first-level SCI; receives the PSSCH on the resources reserved by the first-level SCI (such as the retransmission resources and periodic reservation resources in step 7 above), and determines the energy of the DMRS in the PSSCH to obtain the RSRP measurement result; when the RSRP measurement result is higher than the RSRP threshold in step 3 above, the terminal device excludes the resources reserved by the first-level SCI from the fourth candidate resource set to obtain the fifth candidate resource set; the terminal device excludes the first candidate resource from the fifth candidate resource set to obtain the second candidate resource set. Optionally, after obtaining the second candidate resource set, it can also be determined whether the number of candidate resources in the second candidate resource set is less than X% of the number of candidate resources in the first candidate resource set. When the number of candidate resources in the second candidate resource set is less than X% of the number of candidate resources in the first candidate resource set, the terminal device increases the RSRP threshold determined in step 3 (by 3dB each time) and excludes the resources reserved by the first-level SCI from the fourth candidate resource set based on the new RSRP threshold until the number of candidate resources in the second candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set. Then, the candidate resource set reported to the high-level layer of the terminal device can be obtained.

[0141] Optionally, each step involved in the embodiment of FIG6 may be executed by the physical layer of the terminal device.

[0142] It can be seen that in the above embodiment, the first candidate resource set within the resource selection window is determined based on multiple resource pools, which makes the number of candidate resources in the first candidate resource set greater. Therefore, after the terminal device excludes resources from the first candidate resource set, the number of remaining candidate resources in the first candidate resource set can also be greater, that is, the number of candidate resources in the second candidate resource set is greater, thereby ensuring that the number of candidate resources in the second candidate resource set is not less than X% of the total number of resources in the resource selection window. In this way, the problem of increased probability of resource conflicts caused by raising the RSRP threshold can be reduced, thereby reducing the problem of resource conflicts. That is, the problem of conflicts between the resources selected by the terminal device and the resources selected by other terminal devices is reduced, thereby ensuring the reliability of sidelink transmission.

[0143] The embodiment shown in FIG6 includes many possible implementation solutions. The following examples illustrate the above-mentioned method ① and method ② respectively in conjunction with FIG8 and FIG9. It should be noted that the relevant concepts, operations, or logical relationships not explained in FIG8 or FIG9 can be referred to the corresponding descriptions in the embodiment shown in FIG6, and therefore will not be repeated here.

[0144] As shown in FIG8 , another communication method provided in an embodiment of the present application includes but is not limited to the following steps:

[0145] 801. The physical layer of the terminal device determines a resource selection window.

[0146] Among them, step 801 can refer to the above step 1 and is not described in detail here.

[0147] 802. The physical layer of the terminal device determines the listening window.

[0148] Among them, step 802 can refer to the above step 2 and is not described in detail here.

[0149] 803. The physical layer of the terminal device determines the RSRP threshold.

[0150] 804. The physical layer of the terminal device determines a first candidate resource set within the resource selection window; the first candidate resource set is determined based on N resource pools, where N is an integer greater than 1.

[0151] Among them, step 804 is similar to step 601 and is not described in detail here.

[0152] 805. The first candidate resource set includes a first candidate resource, and the first candidate resource is located on at least two carriers. The physical layer of the terminal device excludes the first candidate resource from the first candidate resource set to obtain a second candidate resource set.

[0153] The first candidate resource is similar to the first candidate resource in FIG6 , and is not described in detail here.

[0154] 806. The physical layer of the terminal device excludes the periodic reserved resources corresponding to the resources in the resource selection window and not listened to in the listening window from the second candidate resource set to obtain a third candidate resource set.

[0155] After step 806, there are two options: Option 1 includes steps 807 to 811, and Option 2 includes steps 812 and 814.

[0156] Option 1:

[0157] 807. When the number of candidate resources in the third candidate resource set is less than X% of the number of candidate resources in the first candidate resource set, the physical layer of the terminal device determines the sixth candidate resource set within the resource selection window; the sixth candidate resource set is determined based on M resource pools, where M is an integer greater than 1.

[0158] Step 807 is similar to step 601 and is not described in detail here. Optionally, the N resource pools are different from the M resource pools, or the N resource pools are partially or completely the same as the M resource pools.

[0159] 808. The sixth candidate resource set includes a sixth candidate resource, and the sixth candidate resource is located on at least two carriers. The physical layer of the terminal device excludes the sixth candidate resource from the sixth candidate resource set to obtain a seventh candidate resource set.

[0160] The sixth candidate resource is similar to the first candidate resource in FIG6 , and is not described in detail here.

[0161] 809. The physical layer of the terminal device excludes the following resources from the seventh candidate resource set: the physical layer of the terminal device obtains the first-level SCI; obtains the PSSCH on the resources reserved by the first-level SCI (such as the retransmission resources and periodic reservation resources in the above step 7), determines the energy of the DMRS in the PSSCH, and obtains the RSRP measurement result; when the RSRP measurement result is higher than the RSRP threshold in the above step 803, the physical layer of the terminal device excludes the resources reserved by the first-level SCI from the seventh candidate resource set to obtain the eighth candidate resource set.

[0162] 810. When the number of candidate resources in the eighth candidate resource set is not less than X% of the number of candidate resources in the sixth candidate resource set, the physical layer of the terminal device sends the eighth candidate resource set to the MAC layer of the terminal device.

[0163] Optionally, the MAC layer of the terminal device may determine candidate resources for sidelink transmission from an eighth candidate resource set.

[0164] 811. When the number of candidate resources in the eighth candidate resource set is less than X% of the number of candidate resources in the sixth candidate resource set, the physical layer of the terminal device increases the RSRP threshold determined in step 803 (by 3dB each time), and excludes the resources reserved by the first-level SCI from the seventh candidate resource set based on the new RSRP threshold, until the number of remaining candidate resources in the seventh candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set, and then sends the remaining candidate resources in the seventh candidate resource set to the MAC layer of the terminal device.

[0165] Optionally, the MAC layer of the terminal device may determine candidate resources for sidelink transmission based on the remaining candidate resources in the seventh candidate resource set.

[0166] Option 2:

[0167] 812. When the number of candidate resources in the third candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set, the physical layer of the terminal device excludes the following resources from the third candidate resource set: the physical layer of the terminal device obtains the first-level SCI; obtains PSSCH on the resources reserved by the first-level SCI (such as the retransmission resources and periodic reservation resources in the above step 7), determines the energy of the DMRS in the PSSCH, and obtains the RSRP measurement result; when the RSRP measurement result is higher than the RSRP threshold in the above step 803, the physical layer of the terminal device excludes the resources reserved by the first-level SCI from the third candidate resource set to obtain a ninth candidate resource set.

[0168] 813. When the number of candidate resources in the ninth candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set, the physical layer of the terminal device sends the ninth candidate resource set to the MAC layer of the terminal device.

[0169] Optionally, the MAC layer of the terminal device may determine candidate resources for sidelink transmission from a ninth candidate resource set.

[0170] 814. When the number of candidate resources in the ninth candidate resource set is less than X% of the number of candidate resources in the first candidate resource set, the physical layer of the terminal device increases the RSRP threshold determined in step 803 (by 3dB each time), and excludes the resources reserved by the first-level SCI from the third candidate resource set based on the new RSRP threshold, until the number of remaining candidate resources in the third candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set, and then sends the remaining candidate resources in the third candidate resource set to the MAC layer of the terminal device.

[0171] Optionally, the MAC layer of the terminal device may determine candidate resources for sidelink transmission based on the remaining candidate resources in the third candidate resource set.

[0172] It can be seen that in the above embodiment, the candidate resources in the resource selection window are determined based on multiple resource pools, which makes the number of candidate resources in the resource selection window greater. Therefore, after the terminal device excludes the candidate resources in the resource selection window, the number of remaining candidate resources can also be greater. For example, it can be guaranteed that the number of candidate resources in the eighth candidate resource set in step 809 is not less than X% of the number of candidate resources in the sixth candidate resource set. Or, it can be guaranteed that after the resources reserved by the first-level SCI are excluded from the seventh candidate resource set based on the new RSRP threshold in step 811, the number of remaining candidate resources in the seventh candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set. In this way, the problem of increased resource conflict probability caused by raising the RSRP threshold can be reduced, and the resource conflict problem can be reduced. That is, the problem of conflict between the resources selected by the terminal device and the resources selected by other terminal devices is reduced, and the reliability of sidelink transmission is guaranteed.

[0173] As shown in FIG9 , another communication method provided in an embodiment of the present application includes but is not limited to the following steps:

[0174] 901. The physical layer of the terminal device determines a resource selection window.

[0175] Among them, step 901 can refer to the above step 1 and is not described in detail here.

[0176] 902. The physical layer of the terminal device determines the listening window.

[0177] Among them, step 902 can refer to the above step 2 and is not repeated here.

[0178] 903. The physical layer of the terminal device determines the RSRP threshold.

[0179] 904. The physical layer of the terminal device determines a first candidate resource set within the resource selection window; the first candidate resource set is determined based on N resource pools, where N is an integer greater than 1.

[0180] Among them, step 904 is similar to step 601 and is not described in detail here.

[0181] 905. The physical layer of the terminal device excludes the periodic reserved resources corresponding to the resources in the resource selection window and not listened to in the listening window from the first candidate resource set to obtain a fourth candidate resource set.

[0182] After step 905, there are two options: Option 1 includes steps 906 to 910; Option 2 includes steps 911 and 914.

[0183] Option 1:

[0184] 906. When the number of candidate resources in the fourth candidate resource set is less than X% of the number of candidate resources in the first candidate resource set, the physical layer of the terminal device determines the tenth candidate resource set within the resource selection window; the tenth candidate resource set is determined based on K resource pools, where K is an integer greater than 1.

[0185] Step 906 is similar to step 601 and is not described in detail here. Optionally, the N resource pools are different from the K resource pools, or the N resource pools are partially or completely the same as the K resource pools.

[0186] 907. The tenth candidate resource set includes a tenth candidate resource, and the tenth candidate resource is located on at least two carriers. The physical layer of the terminal device excludes the tenth candidate resource from the tenth candidate resource set to obtain an eleventh candidate resource set.

[0187] The tenth candidate resource is similar to the first candidate resource in FIG6 , and is not described in detail here.

[0188] 908. The physical layer of the terminal device excludes the following resources from the eleventh candidate resource set: the physical layer of the terminal device obtains the first-level SCI; obtains the PSSCH on the resources reserved by the first-level SCI (such as the retransmission resources and periodic reservation resources in the above step 7), determines the energy of the DMRS in the PSSCH, and obtains the RSRP measurement result; when the RSRP measurement result is higher than the RSRP threshold in the above step 903, the physical layer of the terminal device excludes the resources reserved by the first-level SCI from the eleventh candidate resource set, and obtains the twelfth candidate resource set.

[0189] 909. When the number of candidate resources in the twelfth candidate resource set is not less than X% of the number of candidate resources in the tenth candidate resource set, the physical layer of the terminal device sends the twelfth candidate resource set to the MAC layer of the terminal device.

[0190] Optionally, the MAC layer of the terminal device may determine candidate resources for sidelink transmission from a twelfth candidate resource set.

[0191] 910. When the number of candidate resources in the twelfth candidate resource set is less than X% of the number of candidate resources in the tenth candidate resource set, the physical layer of the terminal device increases the RSRP threshold determined in step 903 (by 3dB each time), and excludes the resources reserved by the first-level SCI from the tenth candidate resource set based on the new RSRP threshold, until the number of remaining candidate resources in the tenth candidate resource set is not less than X% of the number of candidate resources in the tenth candidate resource set, and then sends the remaining candidate resources in the tenth candidate resource set to the MAC layer of the terminal device.

[0192] Optionally, the MAC layer of the terminal device may determine candidate resources for sidelink transmission based on the remaining candidate resources in the tenth candidate resource set.

[0193] Option 2:

[0194] 911. When the number of candidate resources in the fourth candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set, the physical layer of the terminal device excludes the following resources from the fourth candidate resource set: the physical layer of the terminal device obtains the first-level SCI; obtains PSSCH on the resources reserved by the first-level SCI (such as the retransmission resources and periodic reservation resources in the above step 7), determines the energy of the DMRS in the PSSCH, and obtains the RSRP measurement result; when the RSRP measurement result is higher than the RSRP threshold in the above step 903, the physical layer of the terminal device excludes the resources reserved by the first-level SCI from the fourth candidate resource set to obtain the thirteenth candidate resource set.

[0195] 912. The physical layer of the terminal device excludes the first candidate resource from the thirteenth candidate resource set to obtain a second candidate resource set.

[0196] 913. When the number of candidate resources in the second candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set, the physical layer of the terminal device sends the second candidate resource set to the MAC layer of the terminal device.

[0197] Optionally, the MAC layer of the terminal device may determine candidate resources for sidelink transmission from the second candidate resource set.

[0198] 914. When the number of candidate resources in the second candidate resource set is less than X% of the number of candidate resources in the first candidate resource set, the physical layer of the terminal device increases the RSRP threshold determined in step 903 (by 3dB each time), and excludes the resources reserved by the first-level SCI and the first candidate resources from the fourth candidate resource set based on the new RSRP threshold, until the number of remaining candidate resources in the fourth candidate resource set is not less than X% of the number of candidate resources in the first candidate resource set, and then sends the remaining candidate resources in the fourth candidate resource set to the MAC layer of the terminal device.

[0199] Optionally, the MAC layer of the terminal device may determine candidate resources for sidelink transmission based on the remaining candidate resources in the fourth candidate resource set.

[0200] It can be seen that in the above embodiment, the candidate resources in the resource selection window are determined based on multiple resource pools, which makes the number of candidate resources in the resource selection window greater. Therefore, after the terminal device excludes the candidate resources in the resource selection window, the number of remaining candidate resources can also be greater. For example, it can be guaranteed that the number of candidate resources in the twelfth candidate resource set in step 909 is not less than X% of the number of candidate resources in the tenth candidate resource set. Or, it can be guaranteed that after the resources reserved by the first-level SCI are excluded from the tenth candidate resource set based on the new RSRP threshold in step 910, the number of remaining candidate resources in the tenth candidate resource set is not less than X% of the number of candidate resources in the tenth candidate resource set. In this way, the problem of increased resource conflict probability caused by raising the RSRP threshold can be reduced, and the resource conflict problem can be reduced. That is, the problem of conflict between the resources selected by the terminal device and the resources selected by other terminal devices is reduced, and the reliability of sidelink transmission is guaranteed.

[0201] As shown in FIG10 , another communication method provided in an embodiment of the present application includes but is not limited to the following steps:

[0202] 1001. The terminal device determines at least two candidate resource sets within a resource selection window, where the at least two candidate resource sets include a first candidate resource set and a second candidate resource set; the first candidate resource set is determined based on K resource pools, where K is an integer greater than 0; the second candidate resource set is determined based on L resource pools, where L is an integer greater than 0, and the K resource pools are different from the L resource pools.

[0203] Optionally, different candidate resource sets in the at least two candidate resource sets may be determined based on the same or different number of resource pools. For example, if K and L are both 2, the first candidate resource set and the second candidate resource set are determined based on two resource pools. Alternatively, if K is 2 and L is 3, the first candidate resource set is determined based on two resource pools, and the second candidate resource set is determined based on three resource pools.

[0204] Optionally, different candidate resource sets in the at least two candidate resource sets may be determined based on different resource pools, that is, the candidate resources in different candidate resource sets are different.

[0205] Optionally, the relationship between the K resource pools and the BWP may refer to the relationship between the N resource pools and the BWP in Figure 6, and the relationship between the K resource pools and the carrier may refer to the relationship between the N resource pools and the carrier in Figure 6. Similarly, the relationship between the L resource pools and the BWP may refer to the relationship between the N resource pools and the BWP in Figure 6, and the relationship between the L resource pools and the carrier may refer to the relationship between the N resource pools and the carrier in Figure 6.

[0206] Optionally, the K resource pools and the L resource pools have a certain relationship, such as:

[0207] 1. K resource pools and L resource pools are located on the same BWP.

[0208] 2. The BWPs where the K resource pools are located are different from the BWPs where the L resource pools are located. For example, assume that K and L are both 2. In one possible implementation, the K resource pools include resource pool 1 and resource pool 2, and resource pool 1 and resource pool 2 are located on BWP1 and BWP2, respectively. The L resource pools include resource pool 3 and resource pool 4, and resource pool 3 and resource pool 4 are located on BWP3 and BWP4, respectively. It can be seen that the BWPs where resource pools 1 to 4 are located are all different. In another possible implementation, the K resource pools include resource pool 1 and resource pool 2, and resource pool 1 and resource pool 2 are located on BWP1. The L resource pools include resource pool 3 and resource pool 4, and resource pool 3 and resource pool 4 are located on BWP2. It can be seen that the BWPs where resource pool 1 and resource pool 2 are located are different from the BWPs where resource pool 3 and resource pool 4 are located.

[0209] 3. The BWPs where K resource pools reside are partially identical to the BWPs where L resource pools reside. For example, assume that K and L are both 2. The K resource pools include resource pool 1 and resource pool 2, which are located on BWP1 and BWP2, respectively. The L resource pools include resource pool 3 and resource pool 4, which are located on BWP2 and BWP3, respectively. As can be seen, resource pool 1 and resource pool 3 reside in the same BWP, while resource pool 1 (or resource pool 2) and resource pool 4 reside in different BWPs.

[0210] 4. The K resource pools and the L resource pools are located on the same carrier.

[0211] 5. The carriers where the K resource pools are located are different from the carriers where the L resource pools are located. For example, assume that K and L are both 2. In one possible implementation, the K resource pools include resource pool 1 and resource pool 2, and resource pool 1 and resource pool 2 are located on carrier 1 and carrier 2, respectively. The L resource pools include resource pool 3 and resource pool 4, and resource pool 3 and resource pool 4 are located on carrier 3 and carrier 4, respectively. It can be seen that the carriers where resource pool 1 to resource pool 4 are located are different. In another possible implementation, the K resource pools include resource pool 1 and resource pool 2, and resource pool 1 and resource pool 2 are located on carrier 1. The L resource pools include resource pool 3 and resource pool 4, and resource pool 3 and resource pool 4 are located on carrier 2. It can be seen that the carriers where resource pool 1 and resource pool 2 are located are different from the carriers where resource pool 3 and resource pool 4 are located.

[0212] 6. The carriers where the K resource pools reside are partially the same as the carriers where the L resource pools reside. For example, assume that K and L are both 2. The K resource pools include resource pool 1 and resource pool 2, which are located on carriers 1 and 2, respectively. The L resource pools include resource pool 3 and resource pool 4, which are located on carriers 2 and 3, respectively. It can be seen that resource pool 1 and resource pool 3 reside on the same carrier, while resource pool 1 (or resource pool 2) and resource pool 4 reside on different carriers.

[0213] Optionally, before step 1001, the above steps 1 to 3 may be performed. The resource selection window in step 1001 may refer to the resource selection window in step 1 above.

[0214] 1002. The terminal device excludes resources from the first candidate resource set and the second candidate resource set respectively based on the first RSRP threshold to obtain a third candidate resource set and a fourth candidate resource set.

[0215] Optionally, the number of first RSRP thresholds may be one or more. The process for determining the first RSRP threshold may refer to step 3 above and will not be elaborated upon here. It should be noted that any candidate resource included in a candidate resource set (such as the first candidate resource set or the second candidate resource set in step 1002) may correspond to a first RSRP threshold. Optionally, the first RSRP thresholds corresponding to different candidate resources in the candidate resource set may be the same or different.

[0216] Among them, step 1002 can refer to the resource exclusion process of mode 2 above, the resource exclusion process of the embodiment shown in FIG8 or the resource exclusion process of the embodiment shown in FIG9 , and will not be described in detail here.

[0217] 1003. The terminal device determines a fifth candidate resource set based on the third candidate resource set and the fourth candidate resource set, where at least one candidate resource in the fifth candidate resource set is used for sidelink transmission.

[0218] The fifth candidate resource set may be implemented in the following ways, specifically:

[0219] 1. The fifth candidate resource set includes the third candidate resource set and the fourth candidate resource set.

[0220] 2. When the first ratio is greater than or equal to the first threshold and the second ratio is less than the first threshold; or, when the first ratio is greater than the first threshold and the second ratio is less than or equal to the first threshold; or, when both the first ratio and the second ratio are greater than the first threshold, and the first ratio is greater than the second ratio; or, when the number of candidate resources in the third candidate resource set is greater than or equal to the second threshold and the number of candidate resources in the fourth candidate resource set is less than the third threshold; or, when the number of candidate resources in the third candidate resource set is greater than the second threshold and the number of candidate resources in the fourth candidate resource set is less than or equal to the third threshold; or, when the number of candidate resources in the third candidate resource set is greater than the second threshold, the number of candidate resources in the fourth candidate resource set is greater than the third threshold, and the first ratio is greater than the second ratio, the fifth candidate resource set is the third candidate resource set.

[0221] Optionally, the first ratio and the second ratio may be implemented in the following manners, specifically:

[0222] The first type: the first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in the first candidate resource set, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in the second candidate resource set.

[0223] The second type: the first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in at least two candidate resource sets, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in at least two candidate resource sets.

[0224] Optionally, the first threshold is predefined or preconfigured, or the first threshold is indicated by the network device to the terminal device, or the first threshold is indicated by another terminal device to the terminal device. Optionally, the first threshold may be greater than 0. For example, the first threshold is Y%, where Y is a value greater than 0.

[0225] Optionally, the second threshold and the third threshold may be implemented in the following manners, specifically:

[0226] Type 1: The second threshold is determined based on the number of candidate resources in the first candidate resource set and the first threshold, and the third threshold is determined based on the number of candidate resources in the second candidate resource set and the first threshold. For example, the second threshold is the product of the number of candidate resources in the first candidate resource set and the first threshold, and the third threshold is the product of the number of candidate resources in the second candidate resource set and the first threshold.

[0227] Type 2: The second threshold is determined based on the number of candidate resources in at least two candidate resource sets and the first threshold, and the third threshold is determined based on the number of candidate resources in at least two candidate resource sets and the first threshold. For example, the second threshold is the product of the number of candidate resources in at least two candidate resource sets and the first threshold, and the third threshold is the product of the number of candidate resources in at least two candidate resource sets and the first threshold.

[0228] 3. When the first ratio is less than or equal to the first threshold, and the second ratio is greater than the first threshold; or, when the first ratio is less than the first threshold, and the second ratio is greater than or equal to the first threshold; or, when both the first ratio and the second ratio are greater than the first threshold, and the first ratio is less than the second ratio; or, when the number of candidate resources in the third candidate resource set is less than or equal to the second threshold, and the number of candidate resources in the fourth candidate resource set is greater than the third threshold; or, when the number of candidate resources in the third candidate resource set is less than the second threshold, and the number of candidate resources in the fourth candidate resource set is greater than or equal to the third threshold, or, when the number of candidate resources in the third candidate resource set is greater than the second threshold, the number of candidate resources in the fourth candidate resource set is greater than the third threshold, and the first ratio is less than the second ratio, the fifth candidate resource set is the fourth candidate resource set.

[0229] 4. When the first ratio and the second ratio are both smaller than the first threshold; or when the number of candidate resources in the third candidate resource set is smaller than the second threshold, and the number of candidate resources in the fourth candidate resource set is smaller than the third threshold, the terminal device adjusts the first RSRP threshold to the second RSRP threshold, and the second RSRP threshold is larger than the first RSRP threshold; the terminal device excludes resources from the first candidate resource set and the second candidate resource set respectively based on the second RSRP threshold, and obtains the sixth candidate resource set and the seventh candidate resource set; the terminal device determines the fifth candidate resource set based on the sixth candidate resource set and the seventh candidate resource set.

[0230] The terminal device adjusting the first RSRP threshold to the second RSRP threshold may include:

[0231] (1) The terminal device adjusts the first RSRP threshold to the second RSRP threshold according to a preset value. Optionally, the preset value may be a value greater than 0, such as 3 dB.

[0232] (2) When both the first ratio and the second ratio are smaller than the fourth threshold value; or when the number of candidate resources in the third candidate resource set is smaller than the fifth threshold value, and the number of candidate resources in the fourth candidate resource set is smaller than the sixth threshold value, the terminal device adjusts the first RSRP threshold to the second RSRP threshold according to the preset value.

[0233] Optionally, the fourth threshold is predefined or preconfigured, or the fourth threshold is indicated by the network device to the terminal device, or the fourth threshold is indicated by another terminal device to the terminal device. Optionally, the fourth threshold may be greater than 0. For example, the fourth threshold is X%, where X is a value greater than 0. Optionally, Y may be greater than or equal to X. For example, when Y is less than X, the above method (2) is adopted; when Y is greater than or equal to X, the above method (1) is adopted.

[0234] Optionally, the fifth threshold and the sixth threshold may be implemented in the following manners, specifically:

[0235] Type 1: The fifth threshold is determined based on the number of candidate resources in the first candidate resource set and the fourth threshold, and the sixth threshold is determined based on the number of candidate resources in the second candidate resource set and the fourth threshold. For example, the fifth threshold is the product of the number of candidate resources in the first candidate resource set and the fourth threshold, and the sixth threshold is the product of the number of candidate resources in the second candidate resource set and the fourth threshold.

[0236] Second: The fifth threshold is determined based on the number of candidate resources in at least two candidate resource sets and the fourth threshold, and the sixth threshold is determined based on the number of candidate resources in at least two candidate resource sets and the fourth threshold. For example, the fifth threshold is the product of the number of candidate resources in at least two candidate resource sets and the fourth threshold, and the sixth threshold is the product of the number of candidate resources in at least two candidate resource sets and the fourth threshold.

[0237] Among them, the process of the terminal device excluding resources of the first candidate resource set and the second candidate resource set respectively based on the second RSRP threshold can refer to the resource exclusion process of mode 2 above, the resource exclusion process of the embodiment shown in Figure 8 or the resource exclusion process of the embodiment shown in Figure 9, and will not be repeated here.

[0238] Optionally, in the case of adopting the above-mentioned method (1) (i.e., the terminal device adjusts the first RSRP threshold to the second RSRP threshold according to the preset value), the terminal device determines the fifth candidate resource set based on the sixth candidate resource set and the seventh candidate resource set. The following implementation methods may be used, specifically:

[0239] a. The fifth candidate resource set includes the sixth candidate resource set and the seventh candidate resource set.

[0240] b. When the third ratio is greater than or equal to the first threshold and the fourth ratio is less than the first threshold; or, when the third ratio is greater than the first threshold and the fourth ratio is less than or equal to the first threshold; or, when both the third ratio and the fourth ratio are greater than the first threshold, and the third ratio is greater than the fourth ratio; or, when the number of candidate resources in the sixth candidate resource set is greater than or equal to the second threshold and the number of candidate resources in the seventh candidate resource set is less than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold and the number of candidate resources in the seventh candidate resource set is less than or equal to the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, the number of candidate resources in the seventh candidate resource set is greater than the third threshold, and the third ratio is greater than the fourth ratio, the fifth candidate resource set is the sixth candidate resource set.

[0241] Optionally, the third ratio and the fourth ratio may be implemented in the following manners, specifically:

[0242] The first type: the third ratio is the ratio of the number of candidate resources in the sixth candidate resource set to the number of candidate resources in the first candidate resource set, and the fourth ratio is the ratio of the number of candidate resources in the seventh candidate resource set to the number of candidate resources in the second candidate resource set.

[0243] The second type: the third ratio is the ratio of the number of candidate resources in the sixth candidate resource set to the number of candidate resources in at least two candidate resource sets, and the fourth ratio is the ratio of the number of candidate resources in the seventh candidate resource set to the number of candidate resources in at least two candidate resource sets.

[0244] c. When the third ratio is less than or equal to the first threshold and the fourth ratio is greater than the first threshold; or, when the third ratio is less than the first threshold and the fourth ratio is greater than or equal to the first threshold; or, when the third ratio and the fourth ratio are both greater than the first threshold, and the third ratio is less than the fourth ratio; or, when the number of candidate resources in the sixth candidate resource set is less than or equal to the second threshold, and the number of candidate resources in the seventh candidate resource set is greater than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is less than the second threshold, and the number of candidate resources in the seventh candidate resource set is greater than or equal to the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, the number of candidate resources in the seventh candidate resource set is greater than the third threshold, and the third ratio is less than the fourth ratio, the fifth candidate resource set is the seventh candidate resource set.

[0245] d. When both the third ratio and the fourth ratio are less than the first threshold value; or when the number of candidate resources in the sixth candidate resource set is less than the second threshold value, and the number of candidate resources in the seventh candidate resource set is less than the third threshold value, the terminal device adjusts the second RSRP threshold to the third RSRP threshold, and the third RSRP threshold is greater than the second RSRP threshold; based on the third RSRP threshold, the terminal device excludes resources from the first candidate resource set and the second candidate resource set, respectively, to obtain an eighth candidate resource set and a ninth candidate resource set; based on the eighth candidate resource set and the ninth candidate resource set, the terminal device determines the fifth candidate resource set. This is similar to the above-mentioned method 4 and is not elaborated here.

[0246] Optionally, when the above-mentioned method (2) is adopted (i.e., when the first ratio and the second ratio are both less than the fourth threshold; or, when the number of candidate resources in the third candidate resource set is less than the fifth threshold, and the number of candidate resources in the fourth candidate resource set is less than the sixth threshold, the terminal device adjusts the first RSRP threshold to the second RSRP threshold according to the preset value), the terminal device determines the fifth candidate resource set based on the sixth candidate resource set and the seventh candidate resource set. The following implementation methods can be used, specifically:

[0247] A. The fifth candidate resource set includes the sixth candidate resource set and the seventh candidate resource set.

[0248] B. When the third ratio is greater than or equal to the fourth threshold, and the fourth ratio is less than the fourth threshold; or, when the third ratio is greater than the fourth threshold, and the fourth ratio is less than or equal to the fourth threshold; or, when the third ratio and the fourth ratio are both greater than the fourth threshold, and the third ratio is greater than the fourth ratio; or, when the number of candidate resources in the sixth candidate resource set is greater than or equal to the fifth threshold, and the number of candidate resources in the seventh candidate resource set is less than the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the fifth threshold, and the number of candidate resources in the seventh candidate resource set is less than or equal to the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the fifth threshold, the number of candidate resources in the seventh candidate resource set is greater than the sixth threshold, and the third ratio is greater than the fourth ratio, the fifth candidate resource set is the sixth candidate resource set.

[0249] Optionally, the fifth threshold and the sixth threshold may be implemented in the following manners, specifically:

[0250] Type 1: The fifth threshold is determined based on the number of candidate resources in the first candidate resource set and the fourth threshold, and the sixth threshold is determined based on the number of candidate resources in the second candidate resource set and the fourth threshold. For example, the fifth threshold is the product of the number of candidate resources in the first candidate resource set and the fourth threshold, and the sixth threshold is the product of the number of candidate resources in the second candidate resource set and the fourth threshold.

[0251] Second: The fifth threshold is determined based on the number of candidate resources in at least two candidate resource sets and the fourth threshold, and the sixth threshold is determined based on the number of candidate resources in at least two candidate resource sets and the fourth threshold. For example, the fifth threshold is the product of the number of candidate resources in at least two candidate resource sets and the fourth threshold, and the sixth threshold is the product of the number of candidate resources in at least two candidate resource sets and the fourth threshold.

[0252] C. When the third ratio is less than or equal to the fourth threshold, and the fourth ratio is greater than the fourth threshold; or, when the third ratio is less than the fourth threshold, and the fourth ratio is greater than or equal to the fourth threshold; or, when the third ratio and the fourth ratio are both greater than the fourth threshold, and the third ratio is less than the fourth ratio; or, when the number of candidate resources in the sixth candidate resource set is less than or equal to the fifth threshold, and the number of candidate resources in the seventh candidate resource set is greater than the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is less than the fifth threshold, and the number of candidate resources in the seventh candidate resource set is greater than or equal to the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the fifth threshold, the number of candidate resources in the seventh candidate resource set is greater than the sixth threshold, and the third ratio is less than the fourth ratio, the fifth candidate resource set is the seventh candidate resource set.

[0253] D. When both the third ratio and the fourth ratio are less than the fourth threshold value; or when the number of candidate resources in the sixth candidate resource set is less than the fifth threshold value, and the number of candidate resources in the seventh candidate resource set is less than the sixth threshold value, the terminal device adjusts the second RSRP threshold to the third RSRP threshold; based on the third RSRP threshold, the terminal device excludes resources from the first candidate resource set and the second candidate resource set, respectively, to obtain an eighth candidate resource set and a ninth candidate resource set; the terminal device determines the fifth candidate resource set based on the eighth candidate resource set and the ninth candidate resource set. This is similar to the above-mentioned method 4 and is not further described here.

[0254] In one possible implementation, the terminal device may increase the RSRP threshold for the initial candidate resource set corresponding to the candidate resource set with the least number of candidate resources in the third candidate resource set and the fourth candidate resource set, so as to re-exclude resources and determine the fifth candidate resource set. Specifically:

[0255] ①. When the first ratio is greater than or equal to the first threshold and the second ratio is less than the first threshold; or, when the first ratio is greater than the first threshold and the second ratio is less than or equal to the first threshold; or, when the number of candidate resources in the third candidate resource set is greater than or equal to the second threshold and the number of candidate resources in the fourth candidate resource set is less than the third threshold; or, when the number of candidate resources in the third candidate resource set is greater than the second threshold and the number of candidate resources in the fourth candidate resource set is less than or equal to the third threshold, the terminal device adjusts the first RSRP threshold to the second RSRP threshold; the terminal device excludes resources from the second candidate resource set based on the second RSRP threshold to obtain the seventh candidate resource set; the terminal device determines the fifth candidate resource set based on the third candidate resource set and the seventh candidate resource set.

[0256] Exemplarily, the fifth candidate resource set includes the third candidate resource set and the seventh candidate resource set.

[0257] As another example, when the first ratio is greater than or equal to the first threshold and the fourth ratio is less than the first threshold; or, when the first ratio is greater than the first threshold and the fourth ratio is less than or equal to the first threshold; or, when both the first ratio and the fourth ratio are greater than the first threshold, and the first ratio is greater than the fourth ratio; or, when the number of candidate resources in the third candidate resource set is greater than or equal to the second threshold and the number of candidate resources in the seventh candidate resource set is less than the third threshold; or, when the number of candidate resources in the third candidate resource set is greater than the second threshold and the number of candidate resources in the seventh candidate resource set is less than or equal to the third threshold; or, when the number of candidate resources in the third candidate resource set is greater than the second threshold, the number of candidate resources in the seventh candidate resource set is greater than the third threshold, and the first ratio is greater than the fourth ratio, the fifth candidate resource set is the third candidate resource set.

[0258] As another example, when the first ratio is less than or equal to the first threshold and the fourth ratio is greater than the first threshold; or, when the first ratio is less than the first threshold and the fourth ratio is greater than or equal to the first threshold; or, when the first ratio and the fourth ratio are both greater than the first threshold and the first ratio is less than the fourth ratio; or, when the number of candidate resources in the third candidate resource set is less than or equal to the second threshold and the number of candidate resources in the seventh candidate resource set is greater than the third threshold; or, when the number of candidate resources in the third candidate resource set is less than the second threshold and the number of candidate resources in the seventh candidate resource set is greater than or equal to the third threshold, or, when the number of candidate resources in the third candidate resource set is greater than the second threshold, the number of candidate resources in the seventh candidate resource set is greater than the third threshold, and the first ratio is less than the fourth ratio, the fifth candidate resource set is the seventh candidate resource set.

[0259] ②. When the first ratio is less than or equal to the first threshold, and the second ratio is greater than the first threshold; or, when the first ratio is less than the first threshold, and the second ratio is greater than or equal to the first threshold; or, when the number of candidate resources in the third candidate resource set is less than or equal to the second threshold, and the number of candidate resources in the fourth candidate resource set is greater than the third threshold; or, when the number of candidate resources in the third candidate resource set is less than the second threshold, and the number of candidate resources in the fourth candidate resource set is greater than or equal to the third threshold, the terminal device adjusts the first RSRP threshold to the second RSRP threshold; the terminal device excludes resources from the first candidate resource set based on the second RSRP threshold to obtain the sixth candidate resource set; the terminal device determines the fifth candidate resource set based on the sixth candidate resource set and the fourth candidate resource set.

[0260] Illustratively, the fifth candidate resource set includes a sixth candidate resource set and a fourth candidate resource set.

[0261] As another example, when the third ratio is greater than or equal to the first threshold and the second ratio is less than the first threshold; or, when the third ratio is greater than the first threshold and the second ratio is less than or equal to the first threshold; or, when both the third ratio and the second ratio are greater than the first threshold, and the third ratio is greater than the second ratio; or, when the number of candidate resources in the sixth candidate resource set is greater than or equal to the second threshold and the number of candidate resources in the fourth candidate resource set is less than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold and the number of candidate resources in the fourth candidate resource set is less than or equal to the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, the number of candidate resources in the fourth candidate resource set is greater than the third threshold, and the third ratio is greater than the second ratio, the fifth candidate resource set is the sixth candidate resource set.

[0262] As another example, when the third ratio is less than or equal to the first threshold and the second ratio is greater than the first threshold; or, when the third ratio is less than the first threshold and the second ratio is greater than or equal to the first threshold; or, when both the third ratio and the second ratio are greater than the first threshold, and the third ratio is less than the second ratio; or, when the number of candidate resources in the sixth candidate resource set is less than or equal to the second threshold and the number of candidate resources in the fourth candidate resource set is greater than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is less than the second threshold and the number of candidate resources in the fourth candidate resource set is greater than or equal to the third threshold, or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, the number of candidate resources in the fourth candidate resource set is greater than the third threshold, and the third ratio is less than the second ratio, the fifth candidate resource set is the fourth candidate resource set.

[0263] In a possible implementation, the terminal device may increase the RSRP threshold for the initial candidate resource set corresponding to the candidate resource set with the least number of candidate resources in the sixth candidate resource set and the seventh candidate resource set, so as to re-exclude resources and determine the fifth candidate resource set. Specifically:

[0264] ①. When the third ratio is greater than or equal to the first threshold and the fourth ratio is less than the first threshold; or, when the third ratio is greater than the first threshold and the fourth ratio is less than or equal to the first threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than or equal to the second threshold and the number of candidate resources in the seventh candidate resource set is less than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold and the number of candidate resources in the seventh candidate resource set is less than or equal to the third threshold, the terminal device adjusts the second RSRP threshold to the third RSRP threshold; the terminal device excludes resources from the second candidate resource set based on the third RSRP threshold to obtain a ninth candidate resource set; the terminal device determines the fifth candidate resource set based on the sixth candidate resource set and the ninth candidate resource set.

[0265] Illustratively, the fifth candidate resource set includes a sixth candidate resource set and a ninth candidate resource set.

[0266] As another example, when the third ratio is greater than or equal to the first threshold and the fifth ratio is less than the first threshold; or, when the third ratio is greater than the first threshold and the fifth ratio is less than or equal to the first threshold; or, when the third ratio and the fifth ratio are both greater than the first threshold, and the third ratio is greater than the fifth ratio; or, when the number of candidate resources in the sixth candidate resource set is greater than or equal to the second threshold, and the number of candidate resources in the ninth candidate resource set is less than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, and the number of candidate resources in the ninth candidate resource set is less than or equal to the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, the number of candidate resources in the ninth candidate resource set is greater than the third threshold, and the third ratio is greater than the fifth ratio, the fifth candidate resource set is the sixth candidate resource set.

[0267] Optionally, the third ratio and the fifth ratio may be implemented in the following manners, specifically:

[0268] The first type: the third ratio is the ratio of the number of candidate resources in the sixth candidate resource set to the number of candidate resources in the first candidate resource set, and the fifth ratio is the ratio of the number of candidate resources in the ninth candidate resource set to the number of candidate resources in the second candidate resource set.

[0269] The second type: the third ratio is the ratio of the number of candidate resources in the sixth candidate resource set to the number of candidate resources in at least two candidate resource sets, and the fifth ratio is the ratio of the number of candidate resources in the ninth candidate resource set to the number of candidate resources in at least two candidate resource sets.

[0270] As another example, when the third ratio is less than or equal to the first threshold and the fifth ratio is greater than the first threshold; or, when the third ratio is less than the first threshold and the fifth ratio is greater than or equal to the first threshold; or, when the third ratio and the fifth ratio are both greater than the first threshold, and the third ratio is less than the fifth ratio; or, when the number of candidate resources in the sixth candidate resource set is less than or equal to the second threshold and the number of candidate resources in the ninth candidate resource set is greater than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is less than the second threshold and the number of candidate resources in the ninth candidate resource set is greater than or equal to the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, the number of candidate resources in the ninth candidate resource set is greater than the third threshold, and the third ratio is less than the fifth ratio, the fifth candidate resource set is the ninth candidate resource set.

[0271] Optionally, method ① here corresponds to method b above.

[0272] ②. When the third ratio is less than or equal to the first threshold and the fourth ratio is greater than the first threshold; or, when the third ratio is less than the first threshold and the fourth ratio is greater than or equal to the first threshold; or, when the number of candidate resources in the sixth candidate resource set is less than or equal to the second threshold and the number of candidate resources in the seventh candidate resource set is greater than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is less than the second threshold and the number of candidate resources in the seventh candidate resource set is greater than or equal to the third threshold, the terminal device adjusts the second RSRP threshold to the third RSRP threshold; the terminal device excludes resources from the first candidate resource set based on the third RSRP threshold to obtain the eighth candidate resource set; the terminal device determines the fifth candidate resource set based on the eighth candidate resource set and the seventh candidate resource set.

[0273] Illustratively, the fifth candidate resource set includes an eighth candidate resource set and a seventh candidate resource set.

[0274] As another example, when the sixth ratio is greater than or equal to the first threshold and the fourth ratio is less than the first threshold; or, when the sixth ratio is greater than the first threshold and the fourth ratio is less than or equal to the first threshold; or, when the sixth ratio and the fourth ratio are both greater than the first threshold, and the sixth ratio is greater than the fourth ratio; or, when the number of candidate resources in the sixth candidate resource set is greater than or equal to the second threshold and the number of candidate resources in the ninth candidate resource set is less than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold and the number of candidate resources in the ninth candidate resource set is less than or equal to the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, the number of candidate resources in the ninth candidate resource set is greater than the third threshold, and the sixth ratio is greater than the fourth ratio, the fifth candidate resource set is the eighth candidate resource set.

[0275] Optionally, the sixth ratio and the fourth ratio may be implemented in the following manners, specifically:

[0276] The first type: the sixth ratio is the ratio of the number of candidate resources in the eighth candidate resource set to the number of candidate resources in the first candidate resource set, and the fourth ratio is the ratio of the number of candidate resources in the seventh candidate resource set to the number of candidate resources in the second candidate resource set.

[0277] The second type: the sixth ratio is the ratio of the number of candidate resources in the eighth candidate resource set to the number of candidate resources in at least two candidate resource sets, and the fourth ratio is the ratio of the number of candidate resources in the seventh candidate resource set to the number of candidate resources in at least two candidate resource sets.

[0278] As another example, when the sixth ratio is less than or equal to the first threshold and the fourth ratio is greater than the first threshold; or, when the sixth ratio is less than the first threshold and the fourth ratio is greater than or equal to the first threshold; or, when the sixth ratio and the fourth ratio are both greater than the first threshold, and the sixth ratio is less than the fourth ratio; or, when the number of candidate resources in the sixth candidate resource set is less than or equal to the second threshold and the number of candidate resources in the ninth candidate resource set is greater than the third threshold; or, when the number of candidate resources in the sixth candidate resource set is less than the second threshold and the number of candidate resources in the ninth candidate resource set is greater than or equal to the third threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the second threshold, the number of candidate resources in the ninth candidate resource set is greater than the third threshold, and the sixth ratio is less than the fourth ratio, the fifth candidate resource set is the seventh candidate resource set.

[0279] Optionally, method ② here corresponds to method c above.

[0280] ③. When the third ratio is greater than or equal to the fourth threshold, and the fourth ratio is less than the fourth threshold; or, when the third ratio is greater than the fourth threshold, and the fourth ratio is less than or equal to the fourth threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than or equal to the fifth threshold, and the number of candidate resources in the seventh candidate resource set is less than the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the fifth threshold, and the number of candidate resources in the seventh candidate resource set is less than or equal to the sixth threshold, the terminal device adjusts the second RSRP threshold to the third RSRP threshold; the terminal device excludes resources from the second candidate resource set based on the third RSRP threshold to obtain the ninth candidate resource set; the terminal device determines the fifth candidate resource set based on the sixth candidate resource set and the ninth candidate resource set.

[0281] Illustratively, the fifth candidate resource set includes a sixth candidate resource set and a ninth candidate resource set.

[0282] As another example, when the third ratio is greater than or equal to the fourth threshold and the seventh ratio is less than the fourth threshold; or, when the third ratio is greater than the fourth threshold and the seventh ratio is less than or equal to the fourth threshold; or, when both the third ratio and the seventh ratio are greater than the fourth threshold, and the third ratio is greater than the seventh ratio; or, when the number of candidate resources in the sixth candidate resource set is greater than or equal to the fifth threshold and the number of candidate resources in the ninth candidate resource set is less than the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the fifth threshold and the number of candidate resources in the ninth candidate resource set is less than or equal to the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the fifth threshold, the number of candidate resources in the ninth candidate resource set is greater than the sixth threshold, and the third ratio is greater than the seventh ratio, the fifth candidate resource set is the sixth candidate resource set.

[0283] Optionally, the third ratio and the seventh ratio may be implemented in the following manners, specifically:

[0284] The first type: the third ratio is the ratio of the number of candidate resources in the sixth candidate resource set to the number of candidate resources in the first candidate resource set, and the seventh ratio is the ratio of the number of candidate resources in the ninth candidate resource set to the number of candidate resources in the second candidate resource set.

[0285] The second type: the third ratio is the ratio of the number of candidate resources in the sixth candidate resource set to the number of candidate resources in at least two candidate resource sets, and the seventh ratio is the ratio of the number of candidate resources in the ninth candidate resource set to the number of candidate resources in at least two candidate resource sets.

[0286] As another example, when the third ratio is less than or equal to the fourth threshold, and the seventh ratio is greater than the fourth threshold; or, when the third ratio is less than the fourth threshold, and the seventh ratio is greater than or equal to the fourth threshold; or, when the third ratio and the seventh ratio are both greater than the fourth threshold, and the third ratio is less than the seventh ratio; or, when the number of candidate resources in the sixth candidate resource set is less than or equal to the fifth threshold, and the number of candidate resources in the ninth candidate resource set is greater than the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is less than the fifth threshold, and the number of candidate resources in the ninth candidate resource set is greater than or equal to the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is greater than the fifth threshold, the number of candidate resources in the ninth candidate resource set is greater than the sixth threshold, and the third ratio is less than the seventh ratio, the fifth candidate resource set is the ninth candidate resource set.

[0287] Optionally, method ③ here corresponds to method B above.

[0288] ④ When the third ratio is less than or equal to the fourth threshold, and the fourth ratio is greater than the fourth threshold; or, when the third ratio is less than the fourth threshold, and the fourth ratio is greater than or equal to the fourth threshold; or, when the number of candidate resources in the sixth candidate resource set is less than or equal to the fifth threshold, and the number of candidate resources in the seventh candidate resource set is greater than the sixth threshold; or, when the number of candidate resources in the sixth candidate resource set is less than the fifth threshold, and the number of candidate resources in the seventh candidate resource set is greater than or equal to the sixth threshold, the terminal device adjusts the second RSRP threshold to the third RSRP threshold; the terminal device excludes resources from the first candidate resource set based on the third RSRP threshold to obtain the eighth candidate resource set; the terminal device determines the fifth candidate resource set based on the eighth candidate resource set and the seventh candidate resource set.

[0289] Illustratively, the fifth candidate resource set includes an eighth candidate resource set and a seventh candidate resource set.

[0290] As another example, when the eighth ratio is greater than or equal to the fourth threshold, and the fourth ratio is less than the fourth threshold; or, when the eighth ratio is greater than the fourth threshold, and the fourth ratio is less than or equal to the fourth threshold; or, when the eighth ratio and the fourth ratio are both greater than the fourth threshold, and the eighth ratio is greater than the fourth ratio; or, when the number of candidate resources in the eighth candidate resource set is greater than or equal to the fifth threshold, and the number of candidate resources in the seventh candidate resource set is less than the sixth threshold; or, when the number of candidate resources in the eighth candidate resource set is greater than the fifth threshold, and the number of candidate resources in the seventh candidate resource set is less than or equal to the sixth threshold; or, when the number of candidate resources in the eighth candidate resource set is greater than the fifth threshold, the number of candidate resources in the seventh candidate resource set is greater than the sixth threshold, and the eighth ratio is greater than the fourth ratio, the fifth candidate resource set is the eighth candidate resource set.

[0291] Optionally, the eighth ratio and the fourth ratio may be implemented in the following manners, specifically:

[0292] The first type: the eighth ratio is the ratio of the number of candidate resources in the eighth candidate resource set to the number of candidate resources in the first candidate resource set, and the fourth ratio is the ratio of the number of candidate resources in the seventh candidate resource set to the number of candidate resources in the second candidate resource set.

[0293] The second type: the eighth ratio is the ratio of the number of candidate resources in the eighth candidate resource set to the number of candidate resources in at least two candidate resource sets, and the fourth ratio is the ratio of the number of candidate resources in the seventh candidate resource set to the number of candidate resources in at least two candidate resource sets.

[0294] As another example, when the eighth ratio is less than or equal to the fourth threshold, and the fourth ratio is greater than the fourth threshold; or, when the eighth ratio is less than the fourth threshold, and the fourth ratio is greater than or equal to the fourth threshold; or, when the eighth ratio and the fourth ratio are both greater than the fourth threshold, and the eighth ratio is less than the fourth ratio; or, when the number of candidate resources in the eighth candidate resource set is less than or equal to the fifth threshold, and the number of candidate resources in the seventh candidate resource set is greater than the sixth threshold; or, when the number of candidate resources in the eighth candidate resource set is less than the fifth threshold, and the number of candidate resources in the seventh candidate resource set is greater than or equal to the sixth threshold; or, when the number of candidate resources in the eighth candidate resource set is greater than the fifth threshold, the number of candidate resources in the seventh candidate resource set is greater than the sixth threshold, and the eighth ratio is less than the fourth ratio, the fifth candidate resource set is the seventh candidate resource set.

[0295] Optionally, method ④ here corresponds to method C above.

[0296] Optionally, the steps involved in the embodiment of FIG10 may be performed by the physical layer of the terminal device. Optionally, the method may further include: the physical layer of the terminal device sending a fifth candidate resource set to an upper layer of the terminal device. In this way, the upper layer of the terminal device can select resources from the fifth candidate resource set for sidelink transmission.

[0297] It can be seen that in the above embodiment, the resource selection window can include at least two candidate resource sets, and the candidate resource sets can be determined based on at least one resource pool. This increases the number of candidate resources in the resource selection window. Therefore, after the terminal device excludes the candidate resources in the resource selection window, the number of candidate resources remaining in the resource selection window can also be greater, thereby ensuring that the number of candidate resources in the resource selection window is not less than X% of the total number of resources in the resource selection window. In this way, the problem of increased resource conflict probability caused by raising the RSRP threshold can be reduced, and the resource conflict problem can be further reduced. That is, the problem of conflict between the resources selected by the terminal device and the resources selected by other terminal devices is reduced, and the reliability of sidelink transmission is guaranteed. At the same time, by performing resource exclusion on different candidate resource sets in the resource selection window in parallel, the efficiency of resource exclusion can be improved.

[0298] Currently, to improve data transmission reliability, the interval between initially transmitted resources and retransmitted resources is limited. However, this limitation applies only to scenarios where all sidelink feedback resources associated with the PSSCH reside in the same resource pool. Therefore, continuing to use this limitation in other scenarios is likely to lead to unreliable data transmission. Based on this, the present application provides the embodiment shown in Figure 11 to address this issue.

[0299] As shown in FIG11 , another communication method provided in an embodiment of the present application includes but is not limited to the following steps:

[0300] 1101. The first terminal device sends PSSCH on the first resource.

[0301] For example, the first terminal device sends a PSSCH to the second terminal device on the first resource, and correspondingly, the second terminal device receives a PSSCH from the first terminal device on the first resource.

[0302] The PSSCH sent on the first resource may be referred to as an initially transmitted PSSCH (or a PSSCH transmitted for the first time). For ease of description, the following description will be made by taking the PSSCH transmitted for the first time as an example.

[0303] Optionally, the first resource, the second resource and the side link feedback resource may belong to the set of candidate resources reported to the upper layer of the terminal device after resource exclusion in the embodiment described in Figure 6; or, the first resource, the second resource and the side link feedback resource may belong to the set of candidate resources reported to the upper layer of the terminal device after resource exclusion in the embodiment described in Figure 11.

[0304] Optionally, the first resource is located before the second resource in the time domain.

[0305] 1102. A first terminal device retransmits the PSSCH on a second resource; wherein the at least two sidelink feedback resources associated with the PSSCH are respectively located in at least two resource pools, and the interval between the first resource and the second resource is determined according to a first value and a second value; the first value is determined according to the time interval between a time unit in the first resource and a time unit in the last sidelink feedback resource associated with the PSSCH; or, the first value is determined according to a third value and a fourth value, the third value being determined according to the time interval between a time unit in the first resource and a time unit in the first sidelink feedback resource associated with the PSSCH, and the fourth value being determined according to the time interval between a time unit in the first sidelink feedback resource associated with the PSSCH and a time unit in the last sidelink feedback resource associated with the PSSCH. The second value is determined according to a time for processing sidelink feedback information, where the sidelink feedback information is the sidelink feedback information corresponding to the first transmitted PSSCH.

[0306] For example, the first terminal device retransmits the PSSCH to the second terminal device on the first resource. Correspondingly, the second terminal device receives the retransmission of the PSSCH from the first terminal device on the second resource.

[0307] Optionally, the retransmission mentioned in step 1102 may refer to the first retransmission. Optionally, the at least two resource pools may be implemented in the following ways, specifically:

[0308] 1. At least two resource pools are located on the same BWP.

[0309] 2. At least two resource pools are located on different BWPs.

[0310] 3. At least two resource pools are located on the same carrier. This can also be described as: the BWPs in each of the at least two resource pools may belong to the same carrier.

[0311] 4. At least two resource pools are located on different carriers. This can also be described as: the BWPs of each resource pool in at least two resource pools belong to different carriers. This shows that in the carrier aggregation scenario, due to the different subcarrier spacings of different carriers, in order to improve the reliability of data transmission, at least two sidelink feedback resources associated with the PSSCH may be located on different carriers. Therefore, this achieves the definition of a more accurate interval between the initially transmitted resources (i.e., the first resources) and the retransmitted resources (i.e., the second resources) in the carrier aggregation scenario, thereby ensuring the reliable transmission of data.

[0312] It should be noted that the time unit mentioned in the embodiment shown in Figure 11 refers to a symbol. The interval between one time unit and another time unit mentioned in this application may refer to the interval between the end position of one time unit and the start position of another time unit.

[0313] For example, it is assumed that one time unit is symbol 1 and the other time unit is symbol 2. In FIG12 , the interval between the end position of symbol 1 and the start position of symbol 2 is described.

[0314] Optionally, the first value may be implemented in the following manners, specifically:

[0315] 1. The first value is determined based on a time interval between a time unit in the first resource and a time unit of a last sidelink feedback resource associated with the PSSCH. For example, the first value is determined based on a time interval between an end position of the last time unit in the first resource and a start position of a first time unit of the last sidelink feedback resource associated with the PSSCH.

[0316] A time unit in the first resource may also be described as a time unit of the first transmitted PSSCH. The last sidelink feedback resource associated with the PSSCH refers to the latest sidelink feedback resource in the time domain among multiple sidelink feedback resources associated with the PSSCH.

[0317] 2. The first value is determined based on the third and fourth values. For example, the first value is the sum of the third and fourth values. Assume that the first value is a, the third value is a1, and the fourth value is b1, then a = a1 + b1.

[0318] Optionally, the third value is determined based on a time interval between a time unit in the first resource and a time unit of a first sidelink feedback resource associated with the PSSCH. For example, the third value is determined based on a time interval between an end position of a last time unit in the first resource and a start position of a first time unit of the first sidelink feedback resource associated with the PSSCH.

[0319] The first sidelink feedback resource associated with the PSSCH refers to the earliest sidelink feedback resource in the time domain among multiple sidelink feedback resources associated with the PSSCH.

[0320] Optionally, the fourth value is determined based on a time interval between a time unit of a first sidelink feedback resource associated with the PSSCH and a time unit of a last sidelink feedback resource associated with the PSSCH. For example, the fourth value is determined based on a time interval between an end position of the last time unit of the first sidelink feedback resource associated with the PSSCH and a start position of a first time unit of the last sidelink feedback resource associated with the PSSCH.

[0321] Optionally, the second value is determined based on the time for processing sidelink feedback information (the sidelink feedback information is the sidelink feedback information corresponding to the first transmitted PSSCH). This can be understood as follows: the second value is based on the time for decoding the sidelink feedback information and the preparation time for retransmitting the PSSCH. For example, the second value is the sum of the time for decoding the sidelink feedback information and the preparation time for retransmitting the PSSCH.

[0322] Optionally, the time for decoding the sidelink feedback information may be predefined or preconfigured, or the time for decoding the sidelink feedback information may be indicated by the network device or the second terminal device to the first terminal device, etc. For example, the time for decoding the sidelink feedback information may be the maximum time for decoding the sidelink feedback information.

[0323] Optionally, the interval between the first resource and the second resource is determined according to the first numerical value and the second numerical value, which can be understood as: the interval between the first resource and the second resource is greater than or equal to the sum of the first numerical value and the second numerical value. Exemplarily, as shown in Figure 13, two sidelink feedback resources associated with PSSCH, one sidelink feedback resource is located on carrier 1, and the other sidelink feedback resource is located on carrier 2. The sidelink feedback resource located on carrier 2 is the last sidelink feedback resource associated with PSSCH. a is the first numerical value (i.e., the time interval between the end position of the last time unit in the first resource and the start position of the first time unit of the last sidelink feedback resource associated with PSSCH), b is the second numerical value, and the interval between the first resource and the second resource is equal to a+b.

[0324] It can be seen that in the above embodiment, when at least two sidelink feedback resources associated with the PSSCH are respectively located in at least two resource pools, at least two BWPs or at least two carriers, a more accurate interval between the initially transmitted resources (i.e., the first resources) and the retransmitted resources (i.e., the second resources) is defined, thereby ensuring reliable data transmission.

[0325] The above mainly introduces the solution provided by the present application from the perspective of the interaction between various devices. It is understandable that, in order to realize the above functions, the above-mentioned implementation devices include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0326] In the embodiments of the present application, the terminal device (such as the first terminal device, the second terminal device, etc.) or the network device can be divided into functional modules according to the above-mentioned method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0327] Refer to Figure 14, which is a structural diagram of a communication device provided in an embodiment of the present application. The communication device 1400 can be applied to the method shown in the embodiments of Figures 6, 8, 9, 10 or 11 above. As shown in Figure 14, the communication device 1400 includes: a processing module 1401 and a transceiver module 1402. The processing module 1401 can be one or more processors, and the transceiver module 1402 can be a transceiver or a communication interface. The communication device can be used to implement the terminal device or network device involved in any of the above method embodiments, or to implement the functions of the network element involved in any of the above method embodiments. The network element or network function can be a network element in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (e.g., a cloud platform). Optionally, the communication device 1400 can also include a storage module 1403 for storing program code and data of the communication device 1400.

[0328] In one embodiment, when the communication device serves as a terminal device (such as a first terminal device, a second terminal device, etc.) or is a chip applied to a terminal device (such as a first terminal device, a second terminal device, etc.), and executes the steps performed by the terminal device (such as a first terminal device, a second terminal device, etc.) in the above method embodiment. The transceiver module 1402 is used to specifically execute the sending and / or receiving actions performed by the terminal device (such as a first terminal device, a second terminal device, etc.) in the embodiments of Figures 6, 8, 9, 10 or 11, for example, to support the terminal device (such as a first terminal device, a second terminal device, etc.) to execute other processes of the technology described herein. The processing module 1401 can be used to support the communication device 1400 to execute the processing actions in the above method embodiment, for example, to support the terminal device (such as a first terminal device, a second terminal device, etc.) to execute other processes of the technology described herein.

[0329] Exemplarily, processing module 1401 is used to: determine a first candidate resource set within a resource selection window; the first candidate resource set is determined based on N resource pools, where N is an integer greater than 1; perform resource exclusion on the first candidate resource set to obtain a second candidate resource set; at least one candidate resource in the second candidate resource set is used for side link transmission.

[0330] Optionally, the first candidate resource set includes a first candidate resource, and the first candidate resource is located on at least two resource pools, at least two BWPs or at least two carriers. When the first candidate resource set is excluded to obtain the second candidate resource set, the processing module 1401 is used to exclude the first candidate resource from the first candidate resource set to obtain the second candidate resource set.

[0331] Optionally, the processing module 1401 is further configured to exclude, from the second candidate resource set, periodic reserved resources in the resource selection window corresponding to resources not listened to in the listening window, to obtain a third candidate resource set.

[0332] Optionally, the processing module 1401 is also used to exclude the periodic reservation resources corresponding to the resources in the resource selection window and not listened in the listening window from the first candidate resource set to obtain a fourth candidate resource set; when the first candidate resource is excluded from the first candidate resource set to obtain the second candidate resource set, the processing module 1401 is used to exclude the first candidate resource from the fourth candidate resource set to obtain the second candidate resource set.

[0333] Also exemplarily, the processing module 1401 is used to: determine at least two candidate resource sets within the resource selection window, the at least two candidate resource sets including a first candidate resource set and a second candidate resource set; the first candidate resource set is determined based on K resource pools, K is an integer greater than 0; the second candidate resource set is determined based on L resource pools, L is an integer greater than 0, and the K resource pools are different from the L resource pools; based on the first RSRP threshold, exclude resources from the first candidate resource set and the second candidate resource set respectively to obtain a third candidate resource set and a fourth candidate resource set; based on the third candidate resource set and the fourth candidate resource set, determine a fifth candidate resource set, and at least one candidate resource in the fifth candidate resource set is used for side link transmission.

[0334] Optionally, when determining the fifth candidate resource set based on the third candidate resource set and the fourth candidate resource set, the processing module 1401 is used to: when the first ratio and the second ratio are both smaller than the first threshold, adjust the first RSRP threshold to the second RSRP threshold, and the second RSRP threshold is greater than the first RSRP threshold; based on the second RSRP threshold, exclude resources from the first candidate resource set and the second candidate resource set respectively to obtain the sixth candidate resource set and the seventh candidate resource set; and determine the fifth candidate resource set based on the sixth candidate resource set and the seventh candidate resource set.

[0335] In another exemplary embodiment, the transceiver module 1402 is configured to: transmit a PSSCH on a first resource; and retransmit the PSSCH on a second resource; wherein the at least two sidelink feedback resources associated with the PSSCH are located on at least two carriers, respectively, and the interval between the first resource and the second resource is determined according to a first value and a second value; the first value is determined according to the time interval between a time unit in the first resource and a time unit in the last sidelink feedback resource associated with the PSSCH; or, the first value is determined according to a third value and a fourth value, the third value being determined according to the time interval between a time unit in the first resource and a time unit in the first sidelink feedback resource associated with the PSSCH, and the fourth value being determined according to the time interval between a time unit in the first sidelink feedback resource associated with the PSSCH and a time unit in the last sidelink feedback resource associated with the PSSCH. The second value is determined according to the time for processing sidelink feedback information, where the sidelink feedback information is the sidelink feedback information corresponding to the first transmitted PSSCH.

[0336] In another exemplary embodiment, the transceiver module 1402 is configured to: receive a PSSCH on a first resource; and receive a retransmission of the PSSCH on a second resource; wherein the at least two sidelink feedback resources associated with the PSSCH are located on at least two carriers, respectively, and the interval between the first resource and the second resource is determined according to a first value and a second value; the first value is determined according to the time interval between a time unit in the first resource and a time unit in the last sidelink feedback resource associated with the PSSCH; or, the first value is determined according to a third value and a fourth value, the third value being determined according to the time interval between a time unit in the first resource and a time unit in the first sidelink feedback resource associated with the PSSCH, and the fourth value being determined according to the time interval between a time unit in the first sidelink feedback resource associated with the PSSCH and a time unit in the last sidelink feedback resource associated with the PSSCH. The second value is determined according to the time for processing sidelink feedback information, where the sidelink feedback information is the sidelink feedback information corresponding to the first transmitted PSSCH.

[0337] Although the present application has been described in conjunction with specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application, and independent features between the embodiments may be combined with each other.

[0338] In one possible embodiment, when the terminal device (such as the first terminal device, the second terminal device, etc.) or the network device is a chip, the transceiver module 1402 can be a communication interface, a pin or a circuit. The communication interface can be used to input data to be processed to the processor and can output the processing results of the processor. In a specific implementation, the communication interface can be a general purpose input and output (GPIO) interface, which can be connected to multiple peripheral devices (such as a display (LCD), a camera (camara), a radio frequency (RF) module, an antenna, etc.). The communication interface is connected to the processor via a bus.

[0339] The processing module 1401 can be a processor that can execute computer-executable instructions stored in the storage module to cause the chip to perform the methods involved in the embodiments shown in Figures 6, 8, 9, 10, or 11. Furthermore, the processor can include a controller, an arithmetic unit, and registers. For example, the controller is primarily responsible for decoding instructions and issuing control signals for operations corresponding to the instructions. The arithmetic unit is primarily responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logical operations, and can also perform address operations and conversions. The registers are primarily responsible for storing register operands and intermediate operation results temporarily stored during instruction execution. In a specific implementation, the processor's hardware architecture can be an ASIC architecture, a microprocessor without interlocked piped stages architecture (MIPS) architecture, an advanced RISC machine (ARM) architecture, or a network processor (NP) architecture, among others. The processor can be single-core or multi-core. The storage module can be a storage module within the chip, such as a register or cache. The storage module may also be a storage module located outside the chip, such as a ROM or other types of static storage devices that can store static information and instructions, RAM, etc.

[0340] It should be noted that the functions corresponding to the processor and the interface can be implemented through hardware design, software design, or a combination of hardware and software, and there is no limitation here.

[0341] Figure 15 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. It is understandable that the communication device 1510 includes necessary means such as modules, units, elements, circuits, or interfaces, which are appropriately configured together to implement this solution. The communication device 1510 can be the above-mentioned terminal device (such as the first terminal device, the second terminal device, etc.) or the network device, or it can be a component (such as a chip) in these devices to implement the method described in the above method embodiment. The communication device 1510 includes one or more processors 1511. The processor 1511 can be a general-purpose processor or a dedicated processor, etc. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a terminal device (such as the first terminal device, the second terminal device, etc.), the network device, or the chip, etc.), execute the software program, and process the data of the software program.

[0342] Optionally, in one design, the processor 1511 may include a program 1513 (sometimes also referred to as code or instruction), and the program 1513 may be executed on the processor 1511, so that the communication device 1510 performs the method described in the above embodiment. In another possible design, the communication device 1510 includes a circuit (not shown in FIG15 ), and the circuit is used to implement the functions of the terminal device (such as the first terminal device, the second terminal device, etc.) or the network device in the above embodiment. Optionally, the communication device 1510 may include one or more memories 1512, on which a program 1514 (sometimes also referred to as code or instruction) is stored, and the program 1514 can be executed on the processor 1511, so that the communication device 1510 performs the method described in the above method embodiment.

[0343] Optionally, data may also be stored in the processor 1511 and / or the memory 1512. The processor and the memory may be provided separately or integrated together.

[0344] Optionally, the communication device 1510 may further include a transceiver 1515 and / or an antenna 1516. The processor 1511 may also be sometimes referred to as a processing unit, and controls the communication device (e.g., a terminal device (e.g., a first terminal device, a second terminal device, etc.) or a network device). The transceiver 1515 may also be sometimes referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, and is configured to implement the transceiver function of the communication device via the antenna 1516.

[0345] An embodiment of the present application also provides a communication device, which includes at least one processor and a memory; wherein the memory is used to store computer programs or instructions; and at least one processor is used to execute the computer programs or instructions in the memory, so that the method described in any one of the embodiments of Figures 6, 8, 9, 10 or 11 is executed.

[0346] An embodiment of the present application further provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed, the computer executes the method described in any one of the embodiments of Figures 6, 8, 9, 10 or 11.

[0347] An embodiment of the present application further provides a computer program product, which includes: a computer program code, which, when executed by a computer, enables the computer to execute the method described in any one of the embodiments shown in Figures 6, 8, 9, 10, or 11.

[0348] An embodiment of the present application also provides a chip, which includes at least one processor and an interface, wherein the processor is used to read and execute instructions stored in a memory, and when the instructions are executed, the chip executes the method described in any one of the embodiments of Figures 6, 8, 9, 10 or 11.

[0349] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application. In addition, the network element units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software network element units.

[0350] If the above-mentioned integrated unit is implemented in the form of a software network element unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the part that essentially contributes to the technical solution of the present application, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, terminal device, cloud server, or network device, etc.) to perform all or part of the steps of the above-mentioned methods in each embodiment of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk. The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: Determining a first candidate resource set within the resource selection window; The first candidate resource set is determined based on N resource pools, where N is an integer greater than 1; The first candidate resource set is subjected to resource exclusion to obtain a second candidate resource set; at least one candidate resource in the second candidate resource set is used for sidelink transmission.

2. The method according to claim 1, characterized in that The N resource pools are located on the same partial bandwidth BWP; or, At least two resource pools among the N resource pools are located on different BWPs.

3. The method according to claim 1 or 2, characterized in that: The N resource pools are located on the same carrier; or, At least two resource pools among the N resource pools are located on different carriers.

4. The method according to any one of claims 1 to 3, characterized in that: The first candidate resource set includes first candidate resources, the first candidate resources are located on at least two carriers, and the resource exclusion of the first candidate resource set to obtain the second candidate resource set includes: The first candidate resource is excluded from the first candidate resource set to obtain the second candidate resource set.

5. The method according to claim 4, characterized in that The method further comprises: From the second candidate resource set, the periodic reservation resources corresponding to the resources in the resource selection window and not listened to in the listening window are excluded to obtain a third candidate resource set.

6. The method according to claim 4, characterized in that The method further comprises: Excluding the periodic reservation resources corresponding to the resources in the resource selection window and not listened in the listening window from the first candidate resource set, to obtain a fourth candidate resource set; The step of excluding the first candidate resource from the first candidate resource set to obtain the second candidate resource set includes: The first candidate resource is excluded from the fourth candidate resource set to obtain the second candidate resource set.

7. A communication method, characterized in that: include: Determine at least two candidate resource sets within the resource selection window, wherein the at least two candidate resource sets include a first candidate resource set and a second candidate resource set; The first candidate resource set is determined based on K resource pools, where K is an integer greater than 0; the second candidate resource set is determined based on L resource pools, where L is an integer greater than 0, and the K resource pools are different from the L resource pools; Based on a first reference signal received power RSRP threshold, respectively exclude the first candidate resource set and the second candidate resource set to obtain a third candidate resource set and a fourth candidate resource set; A fifth candidate resource set is determined based on the third candidate resource set and the fourth candidate resource set, wherein at least one candidate resource in the fifth candidate resource set is used for sidelink transmission.

8. The method according to claim 7, characterized in that The K resource pools and the L resource pools are located on the same partial bandwidth BWP; or, The BWP where the K resource pools are located is different from the BWP where the L resource pools are located; or, The BWP where the K resource pools are located is partially identical to the BWP where the L resource pools are located.

9. The method according to claim 7 or 8, characterized in that: The K resource pools and the L resource pools are located on the same carrier; or, The carrier where the K resource pools are located is different from the carrier where the L resource pools are located; or, The carriers where the K resource pools are located are partly the same as the carriers where the L resource pools are located.

10. The method according to any one of claims 7 to 9, characterized in that: The fifth candidate resource set includes the third candidate resource set and the fourth candidate resource set.

11. The method according to any one of claims 7 to 9, characterized in that: When the first ratio is greater than the first threshold and the second ratio is less than the first threshold, or when both the first ratio and the second ratio are greater than the first threshold and the first ratio is greater than the second ratio, the fifth candidate resource set is the third candidate resource set; The first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in the first candidate resource set, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in the second candidate resource set; or, The first ratio is the number of candidate resources in the third candidate resource set and the number of candidate resources in the at least two candidate resource sets. The second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in the at least two candidate resource sets.

12. The method according to any one of claims 7 to 9, characterized in that: When the first ratio is less than the first threshold and the second ratio is greater than the first threshold, or when both the first ratio and the second ratio are greater than the first threshold and the first ratio is less than the second ratio, the fifth candidate resource set is the fourth candidate resource set; The first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in the first candidate resource set, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in the second candidate resource set; or, The first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in the at least two candidate resource sets, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in the at least two candidate resource sets.

13. The method according to any one of claims 7 to 9, characterized in that: The determining a fifth candidate resource set based on the third candidate resource set and the fourth candidate resource set includes: When both the first ratio and the second ratio are smaller than a first threshold, adjusting the first RSRP threshold to a second RSRP threshold, where the second RSRP threshold is greater than the first RSRP threshold; Based on the second RSRP threshold, exclude the first candidate resource set and the second candidate resource set respectively to obtain a sixth candidate resource set and a seventh candidate resource set; Determine the fifth candidate resource set based on the sixth candidate resource set and the seventh candidate resource set; The first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in the first candidate resource set, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in the second candidate resource set; or, The first ratio is the ratio of the number of candidate resources in the third candidate resource set to the number of candidate resources in the at least two candidate resource sets, and the second ratio is the ratio of the number of candidate resources in the fourth candidate resource set to the number of candidate resources in the at least two candidate resource sets.

14. A communication device, characterized in that: The method comprises a unit or a module for implementing the method according to any one of claims 1 to 13.

15. A communication device, characterized in that: The communication device comprises at least one processor; wherein the at least one processor is configured to execute the method according to any one of claims 1 to 13.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, which, when executed, cause the computer to perform the method according to any one of claims 1 to 13.

17. A computer program product, characterized in that The computer program product comprises: a computer program code, and when the computer program code is executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 13.

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