WO2022042489A1

WO2022042489A1 - Resource indication and selection methods and apparatuses

Info

Publication number: WO2022042489A1
Application number: PCT/CN2021/114090
Authority: WO
Inventors: 王源泉; 卢磊
Original assignee: 华为技术有限公司
Priority date: 2020-08-31
Filing date: 2021-08-23
Publication date: 2022-03-03
Also published as: CN114125939A

Abstract

Resource indication and selection methods and apparatuses, which can be applied to D2D, Vehicles to Everything (V2X), or the like, or can be applied to the field of intelligent driving, intelligent connected vehicles, and the like. A first terminal receives first sidelink control information from a second terminal, the first sidelink control information being used for indicating a first resource reserved by the second terminal for a sidelink communication, and the first sidelink control information comprising first priority of data to be sent; the first terminal further receives second sidelink control information from a third terminal, the second sidelink control information being used for indicating a second resource reserved by the third terminal for a sidelink communication, and used for indicating second priority of said data of the third terminal; in the case that the first resource overlaps the second resource and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, the resource indication information being used for indicating a third resource recommended by the first terminal to the second terminal.

Description

Resource indication, resource selection method and device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202010896865.6 and the application name "Resource Indication, Resource Selection Method and Device" filed with the China Patent Office on August 31, 2020, the entire contents of which are incorporated herein by reference middle.

technical field

The present application relates to the field of communication technologies, and in particular, to a resource indication and resource selection method and apparatus.

Background technique

In the ^5th generation (5G) new radio (NR) system, there are mainly two transmission modes for vehicle to everything (V2X) communication: one is the base station allocation mode. , that is, mode one (mode-1); the other is a user-selected mode, that is, mode two (mode-2). Among them, the user-selected mode can be mainly applied to V2X communication without network coverage. Because there is no unified resource management of network devices, V2X terminal devices can only select resources from the resource pool to send data. In the user-selected mode, multiple V2X terminal devices may select resources in the same resource pool. In order to reduce the probability of resource collision between V2X terminal devices, a method based on historical listening information is currently used to select resources. In this way, the V2X terminal device can continuously monitor the resource pool. For example, when a resource needs to be selected to send data 1, the V2X terminal device can judge whether a certain resource is occupied by other Whether the resource is used by the V2X terminal device to transmit other data. If it is determined that the resource is not occupied by other V2X terminal equipment, and the resource is not occupied by other data transmitted by the V2X terminal equipment, then the V2X terminal equipment can select the resource to send data 1.

According to the above description, the V2X terminal device needs to exclude resources in the resource pool occupied by other V2X terminal devices and resources occupied by other data transmitted by the V2X terminal device. However, resources selected by the V2X terminal device according to the existing resource exclusion mechanism may still collide with resources, resulting in communication failure.

SUMMARY OF THE INVENTION

The present application provides a resource indication and resource selection method and device. On the one hand, it is used to avoid the problem of resource waste caused by excessive resource indication signaling; The probability of collision of small resources.

In a first aspect, an embodiment of the present application provides a resource indication method, which specifically includes: a first terminal receives first sidelink control information from a second terminal, where the first sidelink control information is used to indicate that the second terminal is a sidelink the first resource reserved by the channel communication, and the first priority for indicating the data to be sent by the second terminal. The first terminal receives the second sidelink control information from the third terminal, where the second sidelink control information is used to instruct the third terminal to reserve the second resource for sidelink communication, and is used to instruct the third terminal to send The second priority of the data; when the first resource overlaps with the second resource and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, and the resource indication information is used for Indicates the third resource recommended by the first terminal for the second terminal.

In the embodiments of the present application, on the one hand, for the first terminal, the first terminal does not need to periodically report resource indication information to the second terminal, but when the first resource and the second resource overlap and the second resource has a higher priority Reporting the resource indication information in the case of the first priority helps reduce signaling overhead and avoid waste of transmission resources; on the other hand, for the second terminal, since the second terminal receives resources from the first terminal Therefore, when determining the transmission resources, not only the available resources that it has heard, but also the resources recommended by other terminals (such as the first terminal) can be considered. Therefore, it is helpful for the second terminal to select resources autonomously. In this way, the probability of collision between the resources independently selected by the second terminal and the resources of other terminals is reduced, thereby helping to improve the possibility of successful communication by the second terminal using the self-selected resources.

In a possible design, case 1: the third resource may include the remaining resources in the first resource except the second resource, for example, the third resource is all or part of the remaining resources. Case 2: The third resource may include resources other than the first resource and the second resource in the resource listening window of the first terminal, for example, the third resource may be removed from the resource listening window of the first terminal except the first resource and the second resource. Choose from a resource other than the second resource. Case 3: The third resource can be selected from the remaining resources and resources other than the first resource and the second resource in the resource listening window of the first terminal. The resource listening window is n time slots before the first terminal resource selection time point, and n is a positive integer.

In the embodiment of the present application, the third resource recommended by the first terminal that meets the above conditions helps to reduce the possibility of collision between the second terminal's self-selected resources and other terminal resources, thereby helping to improve the communication between the second terminal using the self-selected resources probability of success.

In a possible design, the size of the third resource may be the same as the size of the data to be sent by the second terminal. The method helps the second terminal to accurately select a sufficient number of resources to transmit the data to be sent, so as to avoid insufficient resources or waste of resources.

In a possible design, the foregoing method embodiments may be applicable to the following scenarios: the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and at least one of the first terminal belonging to the communication group is scheduled terminal. That is to say, the first terminal may be one of the scheduled terminals in the communication group, or may be two or more scheduled terminals in the communication group. Optionally, the third terminal may not belong to the communication group.

In the embodiment of the present application, when the first terminal is two or more scheduled terminals in the communication group, the second terminal may receive two or more resource indication information, so when determining the sending resource , not only the available resources that it has heard, but also the resources recommended by two or more scheduled terminals can be considered. Therefore, it is helpful for the second terminal to reduce the autonomy of the second terminal in the case of autonomously selecting resources. The probability that the selected resource collides with other terminal resources, thereby helping to improve the probability of successful communication by the second terminal using the self-selected resource.

In a second aspect, an embodiment of the present application provides a resource indication method, which specifically includes: a first terminal determines data to be sent, where a destination end of the data to be sent is a third terminal, and the first terminal sends a resource request message to the second terminal, The resource request message is used to request sidelink resources, and the resource request message includes resource indication information, where the resource indication information is used to indicate a first sidelink resource recommended by the first terminal for sending the data to be sent.

In the embodiment of the present application, on the one hand, for the first terminal, the first terminal does not need to periodically report the resource indication information to the second terminal, but reports the resource indication information when it is determined that data needs to be sent, which helps Reduce signaling overhead and avoid waste of transmission resources. In addition, the resource indication information is carried in the resource request message to avoid repeated signaling and save signaling overhead; on the other hand, for the second terminal, because the second terminal is Receive the resource indication information from the first terminal, so when determining the transmission resources, not only the available resources that it has heard, but also the resources recommended by other terminals (such as the first terminal) can be considered. Therefore, it is helpful for the second terminal. When the terminal autonomously selects resources, the probability of collision between resources autonomously selected by the second terminal and resources of other terminals is reduced, thereby helping to improve the possibility of successful communication by the second terminal using the self-selected resources.

In a possible design, the first terminal receives indication information of transmission resources from the second terminal, and the transmission resources are determined by the second terminal according to the first sidelink resources and the second sidelink resources, and the second terminal The sidelink resource is a candidate resource obtained by the second terminal through listening, or a preconfigured resource, or a resource configured by a network device; the first terminal sends data to the third terminal on the sending resource.

In the embodiment of the present application, for the second terminal, when determining the transmission resources, not only the second sidelink resources that it has sensed, but also the first sidelink resources recommended by other terminals (such as the first terminal) are considered. Therefore, it is helpful for the second terminal to reduce the probability of collision between the resources independently selected by the second terminal and the resources of other terminals when the second terminal autonomously selects resources, thereby helping to improve the use of the transmission by the first terminal. The probability of successful resource communication.

In a possible design, the first terminal receives indication information of a sending resource from the second terminal, where the sending resource is determined by the second terminal according to the first sidelink resource; Send data to the third terminal on the sending resource.

In the embodiment of the present application, the first terminal selects to send data to the third terminal on the recommended transmission resources of the first sidelink resources, which helps to reduce the probability of the collision between the first terminal and other terminal resources.

In a possible design, the above method embodiments may be applicable to the following scenarios: the second terminal and the first terminal and the third terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to the same communication group. The terminal belongs to at least two scheduled terminals in the communication group.

In the embodiment of the present application, the scheduling terminal is responsible for scheduling the transmission resources of the scheduled terminal in this scenario, so as to avoid resource collision between the transmission resources of different terminals in the scheduling terminal group.

In a possible design, the size of the first sidelink resource may be the same as the size of the data to be sent. The method helps the second terminal to accurately select a sufficient number of resources to transmit the data to be sent, so as to avoid insufficient resources or waste of resources.

In a third aspect, an embodiment of the present application provides a resource indication method, which specifically includes: a second terminal determines a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or preconfigured, or a network device configured; the second terminal receives at least two resource indication information respectively from at least two first terminals, where the resource indication information is used to indicate the second candidate resource recommended by the first terminal for the second terminal; The transmission resource is determined from the candidate resources and the at least two second candidate resources; wherein, the second terminal and the at least two first terminals belong to the same communication group, the second terminal is the scheduling terminal, and the at least two first terminals are the scheduled terminals .

In the embodiment of the present application, the scheduling terminal determines the resources for sidelink communication transmission according to its own listening result and the recommended resources reported by two or more scheduled terminals, thus helping the second terminal to autonomously select In the case of resources, the probability of collision between resources independently selected by the second terminal and resources of other terminals is reduced, thereby helping to improve the possibility of successful communication by the first terminal using the transmission resources.

In a fourth aspect, an embodiment of the present application provides a resource indication method, which specifically includes: a second terminal determines a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or preconfigured, or a network device configured; the second terminal receives at least two resource indication information respectively from at least two first terminals, where the resource indication information is used to indicate the second candidate resource recommended by the first terminal for the second terminal; The transmission resource is determined from the candidate resource and the target second candidate resource, wherein the target second candidate resource is the second candidate resource indicated by the resource indication information received closest to the current moment; wherein, the second terminal and at least two first terminals Belonging to the same communication group, the second terminal is a scheduling terminal, and at least two first terminals are scheduled terminals.

In the embodiment of the present application, since the target second candidate resource is the second candidate resource indicated by the resource indication information received most recently from the current moment, it is helpful to accurately exclude the reserved resource, and the terminal is scheduled according to its own listening The result and the target second candidate resource are used to determine the resources of the sidelink communication transmission. Therefore, it is helpful for the second terminal to reduce the probability of collision between the resources independently selected by the second terminal and the resources of other terminals in the case of the second terminal autonomously selecting resources. , thereby helping to improve the possibility of successful communication by the first terminal using the sending resource.

In a fifth aspect, a communication device is provided, for example, the communication device is the aforementioned first terminal or a chip provided inside the first terminal. The communication apparatus is configured to perform the method in the first aspect or any possible implementation manner of the first aspect. Specifically, the communication apparatus may include a module for executing the method in the first aspect or any possible implementation manner of the first aspect, for example, including a processing unit and a transceiver unit. in,

a transceiver unit, configured to receive first sidelink control information from a second terminal; the first sidelink control information is used to indicate that the second terminal is the first resource reserved for sidelink communication, and is used to indicate The first priority of the data to be sent of the second terminal.

a transceiver unit, further configured to receive second sidelink control information from a third terminal, wherein the second sidelink control information is used to instruct the third terminal to reserve a second resource for sidelink communication, and a second priority for indicating the data to be sent by the third terminal;

When the processing unit determines that the first resource and the second resource overlap and the second priority is higher than the first priority, the transceiver unit is further configured to send the first resource to the first resource. The second terminal sends resource indication information, where the resource indication information is used to indicate the third resource recommended by the first terminal for the second terminal.

In a possible design, the third resource includes the remaining resources in the first resource except the second resource, and/or the third resource includes the resource listening window of the first terminal For resources other than the first resource and the second resource in , the resource listening window is n time slots before the first terminal resource selection time point, where n is a positive integer.

In a possible design, the size of the third resource is the same as the size of the data to be sent by the second terminal.

In a possible design, the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and at least one of the first terminal belonging to the communication group is scheduled terminal.

In a possible design, the third terminal does not belong to the communication group. Regarding the technical effects of the fifth aspect or various possible implementations of the fifth aspect, reference may be made to the introduction to the technical effects of the first aspect or corresponding implementations of the first aspect.

In a sixth aspect, a communication device is provided, for example, the communication device is the aforementioned first terminal or a chip provided inside the first terminal. The communication apparatus is configured to execute the method in the second aspect or any possible implementation manner of the second aspect. Specifically, the communication apparatus may include a module for executing the method in the second aspect or any possible implementation manner of the second aspect, for example, including a processing unit and a transceiver unit. in,

the processing unit, configured to determine the data to be sent, and the destination end of the data to be sent is a third terminal;

The transceiver unit is configured to send a resource request message to the second terminal, where the resource request message is used to request sidelink resources, and the resource request message includes resource indication information, and the resource indication information is used to indicate the the first sidelink resource recommended by the first terminal for sending the data to be sent.

In a possible design, the transceiver unit is further configured to receive indication information of a sending resource from the second terminal, where the sending resource is the second terminal according to the first sidelink resource and the first sidelink resource. If the second side link resource is determined, the second side link resource is a candidate resource obtained by the second terminal through listening, or a preconfigured resource, or a resource configured by a network device; the transceiver unit, It is also used for sending data to the third terminal on the sending resource.

In a possible design, the transceiver unit is further configured to receive indication information of a sending resource from the second terminal, where the sending resource is determined by the second terminal according to the first sidelink resource ; a transceiver unit, further configured to send data to the third terminal on the sending resource.

In a possible design, the second terminal and the first terminal and the third terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to the same communication group. At least two scheduled terminals in the communication group.

In a possible design, the size of the first sidelink resource is the same as the size of the data to be sent.

Regarding the technical effects of the sixth aspect or various possible implementations of the sixth aspect, reference may be made to the introduction to the technical effects of the second aspect or corresponding implementations of the second aspect.

In a seventh aspect, a communication device is provided, for example, the communication device is the aforementioned second terminal or a chip provided inside the second terminal. The communication apparatus is configured to execute the method in the third aspect or any possible implementation manner of the third aspect. Specifically, the communication apparatus may include a module for executing the third aspect or the method in any possible implementation manner of the third aspect, for example, including a processing unit and a transceiver unit. in,

the processing unit, configured to determine a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or preconfigured, or configured by a network device;

The transceiver unit is configured to receive at least two resource indication information respectively from at least two first terminals, where the resource indication information is used to indicate that the first terminal is a second candidate resource recommended by the second terminal;

the processing unit, configured to determine a sending resource from the first candidate resource and at least two of the second candidate resources;

The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals.

Regarding the technical effects of the seventh aspect or various possible implementations of the seventh aspect, reference may be made to the introduction to the technical effects of the third aspect or corresponding implementations of the third aspect.

In an eighth aspect, a communication device is provided, for example, the communication device is the aforementioned second terminal or a chip provided inside the second terminal. The communication apparatus is configured to execute the method in the fourth aspect or any possible implementation manner of the fourth aspect. Specifically, the communication apparatus may include a module for executing the method in the fourth aspect or any possible implementation manner of the fourth aspect, for example, including a processing unit and a transceiver unit. in,

the processing unit, configured to determine a sending resource from the first candidate resource and the target second candidate resource;

The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, the at least two first terminals are scheduled terminals, and the target second candidate The resource is the second candidate resource indicated by the resource indication information received most recently from the current moment.

Regarding the technical effects of the eighth aspect or various possible implementations of the eighth aspect, reference may be made to the introduction to the technical effects of the fourth aspect or corresponding implementations of the fourth aspect.

In a ninth aspect, the present application provides a communication device, where the communication device may be a first terminal or a chip provided inside the first terminal. The communication device has the function of implementing the first aspect. For example, the communication device includes functions or units or means (means) corresponding to the steps involved in the execution of the first aspect, and the functions, units or means may be implemented by software. , or implemented by hardware, or by executing corresponding software by hardware.

In a possible design, the communication device includes a processor, and may also include a transceiver, where the transceiver is used to send and receive signals, and the processor executes program instructions to accomplish any of the first and second aspects above methods in possible designs or implementations. Wherein, the communication device may further comprise one or more memories, the memories being coupled to the processor. The one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application. The memory may store necessary computer programs or instructions for implementing the functions involved in the first aspect and the second aspect. The processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device can implement any possible operation related to the first terminal in the first aspect and the second aspect. A method in a design or implementation.

In a possible design, the communication device includes a processor and a memory, and the memory can store necessary computer programs or instructions for implementing the functions involved in the first aspect above. The processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device can implement any possible operation related to the first terminal in the first aspect and the second aspect. A method in a design or implementation.

In a possible design, the communication device includes at least one processor and an interface circuit, wherein the at least one processor is configured to communicate with other devices through the interface circuit, and execute any possibility of the first aspect and the second aspect above. The method executed by the first terminal in the design or implementation of the .

Regarding the technical effects of the ninth aspect or various possible implementations of the ninth aspect, reference may be made to the introduction to the technical effects of the corresponding implementations of the first aspect and the second aspect.

It should be noted that the communication device in the above aspect may be a terminal device, a chip applied in the terminal device, or other combined devices, components, etc. that can implement the functions of the above-mentioned terminal device. When the communication device is a terminal device, the transceiver unit may be a transmitter and a receiver, or an integrated transceiver, which may include an antenna and a radio frequency circuit, and the processing unit may be a processor, such as a baseband chip. When the communication device is a component having the functions of the above-mentioned terminal equipment, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a chip system, the transceiver unit may be an input/output interface of the chip system, and the processing unit may be a processor of the chip system, such as a central processing unit (central processing unit, CPU).

In a tenth aspect, the present application provides a communication device, where the communication device may be a second terminal or a chip provided inside the second terminal. The communication device has the functions involved in implementing the second terminal aspect. For example, the communication device includes functions or units or means corresponding to the steps involved in the third aspect and the fourth aspect. The functions, units or means may be: It is realized by software, or realized by hardware, and it can also be realized by executing corresponding software by hardware.

In a possible design, the communication device includes a processor, and may also include a transceiver, where the transceiver is used to send and receive signals, and the processor executes program instructions to accomplish any of the third and fourth aspects above methods in possible designs or implementations. Wherein, the communication device may further comprise one or more memories, the memories being coupled to the processor. The one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application. The memory may store necessary computer programs or instructions for implementing the functions involved in the third and fourth aspects. The processor can execute the computer programs or instructions stored in the memory, and when the computer programs or instructions are executed, the communication device can implement any possible designs or implementations of the third aspect and the fourth aspect. Methods.

In a possible design, the communication device includes a processor and a memory, and the memory can store necessary computer programs or instructions for implementing the functions involved in the third and fourth aspects above. The processor can execute the computer programs or instructions stored in the memory, and when the computer programs or instructions are executed, the communication apparatus can implement any of the possible designs or implementations of the third aspect and the fourth aspect. A method executed by the second terminal.

In a possible design, the communication device includes at least one processor and an interface circuit, wherein the at least one processor is configured to communicate with other devices through the interface circuit, and execute any possible design on the second terminal side or method in the implementation.

In an eleventh aspect, the present application provides a computer-readable storage medium, where computer-readable instructions are stored in the computer-readable storage medium, and when a computer reads and executes the computer-readable instructions, the computer is made to execute each of the above any possible design method of the aspect.

In a twelfth aspect, the present application provides a computer program product that, when the computer reads and executes the computer program product, causes the computer to execute the method in any possible design of the above aspects.

In a thirteenth aspect, the present application provides a chip, the chip includes a processor, the processor is coupled to a memory, and is configured to read and execute a software program stored in the memory, so as to implement any one of the above aspects method in a possible design.

Description of drawings

FIG. 1 is a schematic diagram of a V2X communication according to an embodiment of the application;

2A and 2B are schematic diagrams of frequency domain resources of a communication resource pool provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of two communication scenarios provided by an embodiment of the present application;

4A is a schematic flowchart of a resource selection method;

4B and 4C are schematic diagrams of a resource listening window and a resource selection window;

5 is a schematic diagram of another communication scenario according to an embodiment of the present application;

6 is a schematic diagram of a communication system architecture according to an embodiment of the present application;

FIG. 7 is a schematic flowchart of a resource indication method according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a third resource according to an embodiment of the present application;

9A is a schematic flowchart of another resource indication and resource selection method according to an embodiment of the present application;

9B is a schematic diagram of another communication scenario according to an embodiment of the present application;

10 is a schematic flowchart of a resource indication and selection method according to an embodiment of the present application;

11 is a schematic diagram of another communication scenario according to an embodiment of the application;

12A is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 12B is a schematic structural diagram of another communication device according to an embodiment of the present application.

detailed description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

It should be understood that the technical solutions in the embodiments of the present application may be applied to a 5G communication system, and may even be applied to future communication systems after 5G, etc., which are not limited in the embodiments of the present application.

In the embodiments of the present application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one (item) of the following" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural item (item). For example, at least one (a) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, c Each can be an element itself, or a collection containing one or more elements.

In the embodiments of the present application, "exemplary", "in some embodiments", "in another embodiment" and the like are used to mean serving as an example, illustration or illustration. Any embodiment or design described in this application as "exemplary" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word example is intended to present a concept in a concrete way.

In the embodiments of this application, "of", "corresponding (relevant)" and "corresponding (corresponding)" can sometimes be used interchangeably. It should be pointed out that when the difference is not emphasized, the meaning to be expressed is consistent. Communication and transmission in the embodiments of the present application may sometimes be used interchangeably. It should be noted that, unless differences are emphasized, the meanings expressed are the same. For example, transmission can include sending and/or receiving, and can be a noun or a verb.

It should be pointed out that words such as "first" and "second" involved in the embodiments of the present application are only used for the purpose of distinguishing and describing, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order. The equals involved in the embodiments of this application can be used in conjunction with greater than, and are applicable to the technical solutions adopted when greater than, and can also be used in conjunction with less than, and are applicable to the technical solutions adopted when and less than. It should be noted that when equals and greater than are connected When used, it is not used with less than; when equal to and less than, it is not used with greater than.

The terminal device involved in the embodiments of this application may be a device that provides voice and/or data connectivity to a user, and is also referred to as user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), etc. For example, handheld devices, in-vehicle devices, etc. with wireless connectivity. At present, some examples of terminal devices are: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented Augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart grid wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.

The network device involved in the embodiments of this application may refer to a device in a wireless network, such as a radio access network (RAN) node (or device) that accesses a terminal device to the wireless network, also referred to as a radio access network (RAN) node (or device). for the base station. At present, some examples of RAN nodes are: evolving Node B (gNB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, home evolved NodeB, or home Node B, HNB) , base band unit (base band unit, BBU), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc. In addition, in a network structure, the RAN may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node. This structure separates the protocol layers of the eNB in the long term evolution (LTE) system. The functions of some protocol layers are centrally controlled by the CU, and the remaining part or all of the functions of the protocol layers are distributed in the DU, which is controlled by the CU. Centralized control of DU.

The core network (core network, CN) device involved in the embodiments of this application. CN devices correspond to different devices in different communication systems, for example, in the 3G system, they correspond to serving GPRS support nodes (serving GPRS support nodes, SGSN) or gateway GPRS support nodes (gateway GPRS support nodes, GGSN), and in 4G systems Corresponding to the mobility management entity (mobility management entity, MME) or serving gateway (serving gateway, S-GW), in the 5G system, corresponding to the core network related equipment (such as NG-Core) of the 5G system.

In order to facilitate the understanding of the present application, some terms in the present application will be explained first.

1) End-to-end (device-to-device, D2D) communication is a method under the control of the system that allows multiple D2D-enabled terminals to perform direct discovery and direct discovery with or without network infrastructure. communication.

V2X communication can be regarded as a special case of D2D communication. V2X communication is a sidelink (SL) communication, which refers to the communication between vehicles and anything in the outside world, including vehicle to vehicle (vehicle to vehicle, V2V) communication, vehicle to pedestrian (V2P) communication, vehicle to infrastructure (V2I) communication, vehicle to network (V2N) communication, etc. Among them, V2V communication may be shown in (a) of FIG. 1 , V2P communication may be shown in (b) of FIG. 1 , and V2I communication or V2N communication may be shown as (c) of FIG. 1 .

It can be seen that V2X communication can obtain the status information of other vehicles and road conditions in real time through direct communication between vehicles, so as to better assist vehicle driving and even realize automatic driving.

2) Air interface resources. In a cell, the base station and the UE can perform data transmission through the air interface resources. The air interface resources may include time-domain resources and frequency-domain resources, and the time-domain resources and frequency-domain resources may also be referred to as time-frequency resources. The time-frequency resource can be a resource grid, including time domain and frequency domain. For example, the time domain unit may be a symbol, and the frequency domain unit may be a subcarrier (subcarrier). The smallest resource unit in a resource grid may be referred to as a resource element (RE). A resource block (resource block, RB) may include one or more subcarriers in the frequency domain, such as 12 subcarriers. A slot may include one or more symbols in the time domain, for example, a slot in NR may include 14 symbols (under a normal cyclic prefix (CP)) or 12 symbols (under an extended cyclic prefix). The frequency domain resource may be located in a set frequency range, the frequency range may also be referred to as a frequency band (band) or a frequency band, and the width of the frequency domain resource may be referred to as a bandwidth (bandwidth, BW).

3) The V2V communication resource pool can be regarded as a collection of time domain resources and frequency domain resources used for V2V communication. The time-frequency resources of V2V communication are configured based on the V2V communication resource pool.

Taking LTE V2X as an example, on the one hand, for the time domain resources of the V2V communication resource pool, as shown in FIG. 2A, the base station adopts a bitmap and periodically repeats the bitmap to indicate all subframes in the system for V2V communication. A set of subframes, the bitmap is used to indicate the subframes of V2V communication, and the length of one bitmap in FIG. 2A is 8 bits. On the other hand: for the frequency domain resources of the V2V communication resource pool, the base station divides the frequency band used for V2V communication into several sub-channels, and each sub-channel contains a certain number of resource blocks. Figure 2B shows a schematic diagram of the frequency domain resources of the communication resource pool, wherein the base station will indicate the sequence number of the first resource block of the frequency domain resources used for V2V communication, the total number N of sub-channels contained in the communication resource pool, each The number n _CH of resource blocks contained in a sub-channel. A V2V transmission can occupy one or more sub-channels at a time. When scheduling V2X communication resources, scheduling is performed with sub-channel granularity in the frequency domain.

At present, in the NR V2X network, in the base station allocation mode, the sidelink resources are allocated by the base station to the terminal, and are mainly used in scenarios with network coverage. A possible implementation manner is: the base station can centrally allocate sidelink resources for the terminals within the coverage of the base station according to the buffer state report (buffer state report, BSR) of the terminals within the coverage of the base station, thereby making the base station V2X communication can be implemented between terminals within the coverage area. For example, as shown in (a) of FIG. 3 , the coverage area of the base station 303 includes the terminal 301 and the terminal 302, and the base station 303 can allocate sidelinks to the terminal 301 and the terminal 302 according to the BSR of the terminal 301 and the BSR of the terminal 302 respectively. Therefore, the terminal 301 and the terminal 302 can implement V2X communication. In particular, it should be noted that the sidelink resources allocated by the base station include initial resources and/or retransmission resources. In the base station allocation mode, the sidelink transmission resources of each terminal are uniformly scheduled by the base station, which can avoid resource occurrence. collision.

Specifically, in the user-selected mode, the sidelink resources are independently selected by the terminal, and are not limited by network coverage, and can be applied to scenarios with or without network coverage. For example, as shown in (b) of FIG. 3 , the terminal 301 and the terminal 302 are not within the coverage of the base station 303. If the terminal 301 needs to send data to the terminal 302, the terminal 301 can independently select resources to realize sending data to the terminal 302. . In particular, it should be noted that the resources independently selected by the terminal include initial resources and/or retransmission resources.

In the user-selected mode, because there is no unified resource management of network devices, V2X terminal devices can only select resources from the resource pool configured by network devices for V2X communication. For example, for a cell, the network device is uniformly configured with a resource pool, then multiple V2X terminal devices in the cell will select resources in the resource pool. In order to reduce the probability of resource collision in V2X terminal equipment, a method based on historical listening information is currently introduced to select resources. Exemplarily, the current process for the terminal to autonomously select resources may be as shown in FIG. 4A , which specifically includes the following steps:

Step 401: The second terminal receives sidelink control information (SCI) sent by other terminals within the resource sensing window (sensing windows).

Referring to FIG. 4C , before the data to be sent reaches subframe n, the second terminal checks the historical listening information of multiple subframes (for example, from nT to n-1) before subframe n, and the historical listening The information is, for example, SCIs sent by other terminals. The SCI includes resource indication information, and the resource indication information is used to indicate the resource A in the resource pool reserved by other terminals in the resource selection window (selection windows).

Illustratively, the positional relationship between the resource listening window and the resource selection window may be as shown in FIG. 4B . In the time domain, the resource listening window occurs before the resource selection window. Among them, the time slot corresponding to the [nT, n-1] interval is the time slot occupied by the resource listening window in the time domain, and the time slot corresponding to the [n+T1, n+T2] interval is the resource selection window in the time domain. Occupied time slots, where T, T1, T2 and n are all positive integers.

Step 402: If the resource A is located in the resource selection window, the second terminal performs reference signal received power (reference signal received power, RSRP) measurement on the resource A to obtain an RSRP measurement result.

Specifically, the second terminal obtains the RSRP measurement by measuring the RSRP on the physical sidelink share channel (PSSCH) or the physical sidelink control channel (PSCCH) of the resource A. result.

Step 403: The second terminal determines a resource listening result according to the RSRP measurement result, where the resource listening result is used to indicate a candidate resource in the resource pool in the resource selection window.

In a possible situation, if the RSRP measurement result of resource A is higher than the RSRP threshold Th _RSRP , the candidate resources in the resource pool are other resources in the communication resource pool except resource A whose RSRP measurement result is higher than the RSRP threshold Th _RSRP .

It should be noted that, the initial value of the RSRP threshold Th _RSRP may be predefined, or may be determined by the second terminal based on a certain algorithm or strategy. For example, when the initial value of the RSRP threshold Th _RSRP is a function of the service priority of the data to be sent by the terminal itself and the service priority of the received data indicated in the SCI from other terminals, the second terminal will send the data according to its own service priority. The service priority of the data and the service priority of the data indicated in the received SCI determine the initial value of the RSRP threshold Th _RSRP .

Step 404: The second terminal determines whether the remaining candidate resources in the resource selection window exceed the set ratio of all candidate resources. If it does not exceed the set ratio, execute step 405, and if it exceeds the set ratio, execute step 406.

For example, set the ratio to 20%. The remaining candidate resources in the resource pool may be other resources in the resource pool except resource A whose RSRP measurement result is higher than the RSRP threshold Th _RSRP . The all candidate resources may be pre-configured by the base station to the second terminal, or may be configured to the second terminal through a network device.

Step 405, the second terminal increases the RSRP threshold Th _RSRP by 3dB, and performs step 403 again.

Step 406, the second terminal selects a sidelink resource for data transmission with the first terminal from the remaining candidate resources in the resource selection window.

As can be seen from FIG. 4A , in the user-selected mode, the second terminal only considers the resource interception result on its own terminal side, so it is easy to cause the second terminal to select the side used for data transmission with the receiving terminal on the opposite side. The uplink resource collides with the resource used for the communication of the terminals around the receiving terminal side on the opposite side, thereby causing data transmission failure on the side uplink resource autonomously selected by the second terminal.

Exemplarily, as shown in FIG. 5 , the transmitting end UE1 sends sideline control and data to the receiving end UE1 on the resource A selected by it, but the transmitting end UE2 near the receiving end UE1 also happens to be on the resource A to the receiving end UE2. Transmitting side line control and data (the transmitting end UE1 is outside the transmission range of the transmitting end UE2, so resource A is considered as a candidate resource), so the receiving end UE1 receiving signals on resource A will be interfered by the transmitting end UE2 and may not be received correctly. In the lateral transmission of the transmitting end UE1, due to the collision of resources, the communication between the transmitting end UE1 and the receiving end UE1 is likely to fail.

In order to solve the problem shown in FIG. 5, a solution is currently provided: the first terminal actively reports the recommended resource information to the second terminal periodically, or the second terminal instructs the first terminal to report the recommended resource information, so that the first terminal The second terminal can rely on the recommended resource information sent by the first terminal and its own listening result to configure the sidelink communication resources of the first terminal to reduce the possibility of resource collision, thereby reducing communication interference and improving resource utilization. rate and the success rate of sidelink communications. However, this method will frequently report recommended resource information, resulting in problems of high signaling overhead and waste of resources.

In view of this, an embodiment of the present application provides a resource indication method, which helps the first terminal to use the received sideline control information, such as SCI, to trigger the first terminal to report the recommended resource information to the second terminal, The problem of wasting transmission resources caused by the first terminal periodically reporting recommended resources is avoided.

The embodiments of the present application may be applied to a sidelink (sidelink, SL) communication scenario in a wireless communication system, such as a V2X communication scenario, a device to device (device to device, D2D) communication scenario, and the like. For example, the embodiments of the present application can be applied to NR V2X communication scenarios, NR D2D communication scenarios, LTE V2X communication scenarios, and the like. The embodiments of the present application can also be applied to the Internet of Vehicles, such as V2X, LTE-V, V2V, etc., or applied to fields such as intelligent driving, intelligent networked vehicles, and the like. Alternatively, the embodiments of the present application may also be applied to other scenarios or other communication systems, for example, may also be used for resource selection of the Uu interface of the LTE system or the NR system, which is not specifically limited.

It should be noted that the terminal used for sidelink communication may be located within the coverage of the network device, or may not be covered by the network. For example, the communication scenario applied by the embodiment of the present application may be as shown in FIG. 6 , a scenario in which a terminal 601 and a terminal 602 perform SL communication, where the terminal 601 is located within the coverage of the network device 603 , and the terminal 602 is located within the coverage of the network device 603 outside. Or, in a scenario where the terminal 604 and the terminal 605 perform sidelink communication, the terminal 604 and the terminal 605 are both located outside the coverage of the network device 603 .

The network device in FIG. 6 is, for example, an access network device, such as a base station, or may also be a road side unit (road side unit, RSU), etc. The base station is used as an example in FIG. 6 . Among them, the access network equipment corresponds to different equipment in different systems. For example, in the fourth generation mobile communication technology (the 4th generation, 4G) system, it can correspond to the eNB, and in the 5G system, it corresponds to the access network equipment in 5G, such as gNB. The terminal device in FIG. 6 is a vehicle-mounted terminal device or a car as an example, but the terminal device in the embodiment of the present application is not limited to this. It can be understood that the embodiments of the present application can also be applied to scenarios in which the terminal recommends resources and selects resources in other communication systems.

It should be understood that the data to be sent by the terminal involved in the embodiments of the present application may include at least one of sidelink service data, sidelink control information, and sidelink feedback information. Among them, the sidelink service data is carried on the PSSCH, the sidelink control information is carried on the physical sidelink control channel (PSCCH), and the sidelink feedback information is carried on the physical sidelink feedback on the physical sidelink feedback channel (PSFCH). In the following description, the sidelink service data is mainly used as an example for description, and is simply referred to as data.

It should also be understood that when the terminal device "transmits" data, it may be understood that the terminal device "sends" data, or other descriptions may be used, which are not limited in this embodiment of the present application.

Next, the technical solutions provided by the embodiments of the present application are described with reference to the accompanying drawings.

An embodiment of the present application provides a resource indication method. Please refer to FIG. 7 , which is a flowchart of the method. In the following introduction process, the method is applied to the network architecture shown in FIG. 6 as an example. Additionally, the method may be performed by two communication devices, eg, a first communication device and a second communication device. The first communication device may be a first terminal, or a communication device capable of supporting functions required by the first terminal to implement the method, such as a component included in the first terminal, or the first communication device may be a first terminal, or To be a communication device capable of supporting the functions required by the first terminal to implement the method, such as components included in the first terminal, of course, the first communication device may also be other communication devices, such as a chip system in the first terminal. Similarly, the second communication device may be a second terminal, or a communication device capable of supporting the functions required by the second terminal to implement the method, such as a component included in the second terminal, or the second communication device may be a second terminal, Or a communication device capable of supporting the functions required by the second terminal to implement the method, such as components included in the second terminal. Of course, the second communication device may also be other communication devices, such as a chip system in the second terminal. And there is no restriction on the implementation of the first communication device and the second communication device, for example, the two communication devices can be realized in the same form, for example, both are realized in the form of equipment, or the two communication devices can also be realized as Different forms, for example, the first communication device is realized in the form of a device, the second communication device is realized in the form of a chip system, and so on. In this embodiment of the present application, a communication device capable of implementing the function of the first terminal may also be referred to as a first communication device, and a communication device capable of implementing the function of the second terminal may also be referred to as a second communication device.

For ease of introduction, hereinafter, the resource indication method in this embodiment of the present application will be described in detail by taking the method being executed by the second terminal and the first terminal as an example.

FIG. 7 is a schematic flowchart of a resource indication method provided by an embodiment of the present application, and the method may include the following steps.

Step 701, the second terminal sends the first sideline control information to the first terminal. The first sideline control information is used to indicate the first resource reserved by the second terminal for sidelink communication, and the first sideline control information is also used to indicate the first priority of the data to be sent by the second terminal.

That is, before the second terminal sends data to the first terminal, the second terminal reserves the first resource for sidelink communication between the first terminal and the second terminal. For example, if the data to be sent by the second terminal is periodic transmission data, the second terminal usually reserves resources for sending the data. If the data to be sent is aperiodic transmission data, the second terminal configures the first resource for it in advance, or the network device configures the first resource for the data to be sent by the second terminal.

Wherein, the first sidelink control information may be carried in sidelink control information (sidelink control information, SCI). Exemplarily, taking the first sideline control information as the first SCI as an example, the "time and frequency resource assignment (time domain and frequency domain resource indication)" field in the first SCI indicates the time-frequency position of the first resource, The "priority" field in the first SCI indicates the value of prioRX, where prioRX indicates the first priority of the data to be sent by the second terminal, wherein the lower the value of prioRX, the higher the priority.

In addition, the first sideline control information may also indicate the resource location of the reference signal corresponding to the received power of the reference signal, so that the first terminal can measure the reference signal according to the resource location indicated by the first sideline control information, obtain a measurement result, and measure the The result includes, for example, RSRP, and certainly may include other information, wherein the reference signal corresponding to the received power of the reference signal may be the received power of the demodulation reference signal (demodulation reference signal, DMRS) on the PSSCH or PSCCH.

Step 702, the third terminal sends the second sideline control information to the first terminal. The second sideline control information is used to indicate the second resource reserved by the third terminal for sidelink communication, and the second sideline control information is also used to indicate the second priority of the data to be sent by the third terminal.

In other words, before the third terminal sends data to the fourth terminal, the third terminal reserves the second resource for sidelink communication between the third terminal and the fourth terminal. When the third terminal is in the vicinity of the first terminal but not within the transmission range of the second terminal, the third terminal may use the first resource as a candidate resource, so the second resource reserved by the third terminal may be the same as all or the same as the first resource. Partially overlapping.

Wherein, the second sideline control information can be carried in the second SCI, and the "time and frequency resource assignment (time domain and frequency domain resource indication)" field in the second SCI indicates the time-frequency position of the second resource, and the second SCI The "priority (priority)" field in indicates the value of prioRX, and prioRX indicates the second priority of the data to be sent by the third terminal.

It should be noted that when the second resource overlaps with the first resource in whole or in part, if the second priority in the second SCI is higher than the first priority, it means that the first resource and the second resource are overlapping resources. It may be preferentially used to transmit data to be sent by the third terminal. That is, the overlapping resource among the first resource and the second resource may be occupied by a terminal other than the first terminal.

In addition, it should be noted that the first terminal may also respectively receive the second sideline control information sent by two or more third terminals. In other words, geographically, there may be two or more third terminals located around the first terminal, and some third terminals may reserve the second resource for sidelink communication overlapping the first resource, It is also possible that the second resource reserved by the third terminal for sidelink communication does not overlap with the first resource.

Step 703: In the case where the first resource overlaps with the second resource and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, where the resource indication information is used to indicate the first terminal The third resource recommended for the second terminal.

The third resource determined by the first terminal may satisfy any one of the following conditions:

Case 1, the third resource includes the remaining resources in the first resource except the second resource. The remaining resources may be all or part of the first resources except the second resources, and the size of the third resources may be the same as the size of the data to be sent by the second terminal. Exemplarily, as shown in (a) of FIG. 8 , the first resource reserved by the second terminal is resource 801, and the second resource reserved by the third terminal is resource 802. As can be seen from the figure, the part of resource 802 and resource 801 is Overlapping, the first terminal determines that the third resource is all or part of the resources in the resource 801 except the resource occupied by the resource 802 .

In case 2, the third resource includes resources other than the first resource and the second resource in the resource listening window of the first terminal, and the size of the third resource may be the same as the size of the data to be sent by the second terminal. Exemplarily, as shown in (b) of FIG. 8 , the first resource reserved by the second terminal is resource 801, and the second resource reserved by the third terminal is resource 802. As can be seen from the figure, the part of resource 802 and resource 801 is Overlapping, the first terminal determines that the third resource is the resource 803 in the resource listening window, and the resource 803 does not overlap with the resource 801 and the resource 802 .

In a possible embodiment, in a scenario where the first terminal receives the second sideline control information sent by two or more third terminals respectively, it is assumed that the second sideline control information of other third terminals is A fourth resource is reserved for sidelink communication of other third terminals, and the third resource includes resources other than the first resource, the second resource and the fourth resource in the resource listening window of the first terminal. Exemplarily, as shown in (c) of FIG. 8 , the fourth resource reserved by the second sidelink control information of the other third terminal for the sidelink communication of the other third terminal is resource 804, and the second terminal reserves the resource 804. The first resource is resource 801, and the second resource reserved by the third terminal is resource 802. As can be seen from the figure, resource 802 and resource 801 partially overlap, and the first terminal determines that the third resource is resource 803 in the resource listening window. Resource 803 does not overlap with resource 801, resource 802, and resource 804.

In case 3, the third resource includes not only the remaining resources, but also the resources other than the first resource and the second resource in the resource listening window of the first terminal, and the size of the third resource can be the same as that of the data to be sent by the second terminal. of the same size. Exemplarily, as shown in (d) of FIG. 8 , the first resource reserved by the second terminal is resource 801, and the second resource reserved by the third terminal is resource 802. As can be seen from the figure, the part of resource 802 and resource 801 is Overlapping, the first terminal determines that the third resource is the resource 803 in the resource listening window, and the resource 803 includes not only some resources of the resource 801 except the resource 802, but also the resources other than the resource 802 in the resource listening window.

In a possible embodiment, in a scenario where the first terminal receives the second sideline control information sent by two or more third terminals respectively, it is assumed that the second sideline control information of other third terminals is The fourth resource is reserved for the sidelink communication of other third terminals, and the third resource includes not only the remaining resources, but also the first resource, the second resource, and the fourth resource in the resource listening window of the first terminal. external resources. Exemplarily, as shown in (e) of FIG. 8 , the fourth resource reserved by the second sidelink control information of the other third terminal for the sidelink communication of the other third terminal is resource 804, and the second terminal reserves the resource 804. The first resource is resource 801, and the second resource reserved by the third terminal is resource 802. As can be seen from the figure, resource 802 and resource 801 partially overlap, and the first terminal determines that the third resource is resource 803 in the resource listening window. Resource 803 includes not only some resources of resource 801 except resource 802, but also resources other than resource 802 and resource 804 in the resource listening window.

In this embodiment, the third resource recommended by the first terminal that meets the above conditions helps to reduce the possibility of collision between the resources selected by the second terminal and the resources of other terminals, thereby helping to improve the successful communication of the second terminal using the resources selected by the second terminal. possibility.

In a possible implementation manner, after receiving the resource indication information, the second terminal may complete resource selection based on the resource indication information, and the above method may further include the following step 704.

Step 704: After receiving the resource indication information, the second terminal determines, according to the first candidate resource and the third resource, a sending resource for sending data to be sent by the second terminal, and sends data to the first terminal on the sending resource.

The first candidate resource is a resource heard by the second terminal, or the first candidate resource is a preconfigured resource, or the first candidate resource is a resource configured by a network device. Alternatively, the network device sends control information to the terminal device in advance, the control information configures a candidate resource pool, and the terminal device can determine the first candidate resource from the candidate resource pool according to the listening result. In other words, the protocol predefines a candidate resource pool, and the terminal device can determine the first candidate resource from the candidate resource pool according to the listening result.

For the manner in which the second terminal obtains the first candidate resource by listening to the resource pool of the resource selection window, reference may be made to the related introduction about the process of the terminal autonomously selecting resources in FIG. 4A , and details are not repeated here.

Specifically, for the specific manner in which the second terminal selects the sending resource for sidelink communication with the first terminal from the first candidate resource and the third resource, there may be one or more of the following manners Way.

Manner 1: The second terminal calculates a first ratio between the number of resources at the intersection of the third resource and the first candidate resource and the number of resources in the resource pool, and compares the size of the first ratio with the first threshold. When the first ratio is greater than or When it is equal to the first threshold, it is determined that the intersection of the third resource and the first candidate resource is the sending resource.

Since the sending resource is the intersection of the resource it has heard and the resource recommended by the first terminal, it helps to prevent the second terminal from selecting the third resource and the first candidate resource from the resource pool except for the intersection of resources, thereby further The possibility of collision between the resources independently selected by the second terminal and the resources of other terminals is reduced, which helps to improve the success rate of the communication of the second terminal on the transmission resources.

Mode 2: The second terminal calculates a first ratio between the number of resources at the intersection of the third resource and the first candidate resource and the number of resources in the resource pool, and compares the first ratio with the first threshold. When there is a threshold, the second terminal calculates a second ratio between the resource quantity of the first candidate resource and the resource quantity of the resource pool, and compares the size of the second ratio with the first threshold, and when the second ratio is greater than or equal to the first threshold When , the first candidate resource is determined to be the sending resource. The method helps to reduce the possibility that the second terminal selects a resource other than the intersection of the third resource and the first candidate resource from the resource pool, and reduces the possibility that the resources independently selected by the second terminal collide with the resources of other terminals This is helpful to improve the success rate of the communication of the second terminal on the sending resource.

In the above method shown in FIG. 7 , in conjunction with FIG. 5 , for example, the receiving end UE1 (ie the first terminal above) receives the first SCI (the first SCI) from the transmitting end UE1 (ie the second terminal above) The first resource is used to transmit the data to be sent by the sender UE1, and the first SCI carries a prioRX of 4). In addition, the sender UE2 near the receiver UE1 sends the second SCI to the receiver UE2 (wherein the second SCI in the second SCI is the second SCI). The resource is used to transmit the data to be sent by the sender UE2, and the second SCI carries prioRX of 3). The receiver UE1 can also receive the second SCI from the sender UE2 (ie, the third terminal above). Because the transmitter UE1 is outside the transmission range of the transmitter UE2, the transmitter UE2 may consider the first resource to be a candidate resource, so the second resource reserved by the transmitter UE2 for the receiver UE2 may completely or partially overlap with the first resource. Because the larger the value of prioRX, the lower the priority of data, so when the receiving end UE1 determines that the second resource may overlap with the first resource in whole or in part, the data to be sent by the transmitting end UE2 may occupy all or part of the first resource. some resources. Therefore, at this time, the receiving end UE1 determines the third resource according to the method shown in step 703, and sends the resource indication information used to indicate the third resource to the transmitting end UE1. In this way, the transmitting end UE1 listens according to the result of its own resources. and resource indication information to select the sending resource. In the case of the sending end UE1 independently selecting resources, it can reduce the probability of collision between the resources independently selected by the sending end UE1 and the resources of other terminals (such as the sending end UE2), thereby helping to improve the sending end. The probability of successful communication of UE1 using self-selected resources.

9A is a schematic flowchart of a resource indication method and a resource selection method provided by an embodiment of the present application. The method is applicable to the following scenarios: the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal is a scheduling terminal. The terminal belongs to at least one scheduled terminal in the communication group. The method may specifically include the following steps.

Step 901, the second terminal sends the first sideline control information to the first terminal. The first sideline control information is used to indicate the first resource reserved by the second terminal for sidelink communication, and the first sideline control information is also used to indicate the first priority of the data to be sent by the second terminal.

In this step, the process of reserving the first resource by the second terminal for sidelink communication, and the first sidelink control information may be carried in the SCI. For the field information in the SCI, refer to step 701 above, which will not be repeated here. Repeat.

Step 902, the third terminal sends the second sideline control information to the first terminal. The second sideline control information is used to indicate the second resource reserved by the third terminal for sidelink communication, and the second sideline control information is also used to indicate the second priority of the data to be sent by the third terminal.

Likewise, for the detailed introduction of this step 902, reference may be made to the above-mentioned step 702, which will not be repeated here.

Step 903: In the case where the first resource overlaps with the second resource and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, where the resource indication information is used to indicate the first terminal The second candidate resource recommended for the second terminal.

Wherein, for the condition that the third resource determined by the first terminal may satisfy, reference may be made to the foregoing step 703 .

Step 904, the second terminal determines the first candidate resource.

After receiving the resource indication information, the second terminal may complete resource selection based on the resource indication information. See step 905a for the first possible resource selection manner, and step 905b for the second possible resource selection manner.

Step 905a, after the second terminal receives the at least two resource indication information, the second terminal determines the sending resource from the first candidate resource and the at least two second candidate resources.

Exemplarily, referring to FIG. 9B , the three first terminals in the scheduled terminal group all receive the first sideline control information from the second terminal, and the other three first terminals also receive the first sideline control information from the third terminal. On the second side of the control information, the three first terminals perform RSRP measurement on the first resource and the second resource respectively, obtain the RSRP measurement result, and determine the second candidate resource based on the resource listening result respectively, so that the three first terminals respectively report to the third A terminal reports resource indication information, and the first terminal determines a transmission resource from the first candidate resources and the at least two second candidate resources based on the three second candidate resources and the first candidate resources indicated by the three resource indication information.

Specifically, for the specific manner in which the second terminal selects the transmission resource for sidelink communication with the first terminal from the first candidate resource and the at least two second candidate resources, there may be one of the following manners one or more ways.

Manner 1: The second terminal calculates a first ratio between the number of resources at the intersection of the at least two second candidate resources and the first candidate resource and the number of resources in the resource pool, and compares the first ratio with the first threshold. When the ratio is greater than or equal to the first threshold, the intersection of the at least two second candidate resources and the first candidate resource is determined as the sending resource.

Since the transmission resource is the intersection of the resource it has heard and the resource recommended by the first terminal, it helps to avoid the second terminal from selecting at least two second candidate resources from the resource pool and the first candidate resource except for the intersection. resources, thereby further reducing the possibility of collision between the resources independently selected by the second terminal and the resources of other terminals, and helping to improve the success rate of the communication of the second terminal on the sending resources.

Manner 2: The second terminal calculates a first ratio between the number of resources at the intersection of the at least two second candidate resources and the first candidate resource and the number of resources in the resource pool, and compares the first ratio with the first threshold. When the ratio is smaller than the first threshold, the second terminal calculates a second ratio between the resource quantity of the first candidate resource and the resource quantity of the resource pool, and compares the magnitude of the second ratio with the first threshold, and when the second ratio is greater than or When it is equal to the first threshold, the first candidate resource is determined to be the sending resource. The method helps to reduce the possibility that the second terminal selects a resource other than the intersection of the third resource and the first candidate resource from the resource pool, and reduces the possibility that the resources independently selected by the second terminal collide with the resources of other terminals This is helpful to improve the success rate of the communication of the second terminal on the sending resource.

Step 905b, the second terminal determines the candidate resource from the target second candidate resource indicated by the resource indication information received closest to the current moment and the first candidate resource set.

Exemplarily, still referring to FIG. 9B , the three first terminals in the scheduled terminal group all receive the first sideline control information from the second terminal, and the other three first terminals also receive the information from the third terminal. In the second sideline control information, the three first terminals perform RSRP measurement on the first resource and the second resource respectively, obtain the RSRP measurement result, and determine the second candidate resource based on the resource listening result respectively, so that the three first terminals respectively send the The first terminal reports the resource indication information, and the first terminal determines the sending resource from the first candidate resource and the target second candidate resource based on the target second candidate resource and the first candidate resource indicated by the resource indication information recently received from the current moment .

In the embodiment of the present application, since the target second candidate resource is the second candidate resource indicated by the resource indication information received most recently from the current moment, it is helpful to accurately exclude the reserved resource, and the terminal is scheduled according to its own listening The result and the target second candidate resource are used to determine the resources of the sidelink communication transmission, thus, it is helpful for the second terminal to reduce the probability of collision between the resources independently selected by the second terminal and the resources of other terminals in the case of the second terminal autonomously selecting the resources. , thereby helping to improve the possibility of successful communication by the first terminal using the sending resource.

FIG. 10 is a schematic flowchart of a resource indication method provided by an embodiment of the present application. The method is applicable to the scenario shown in FIG. 11 : the second terminal, the third terminal, and the first terminal belong to the same communication group, and the second terminal is The scheduling terminal, the first terminal and the third terminal belong to the scheduled terminals in the communication group. The method may specifically include the following steps.

Step 1001, the first terminal determines the data to be sent, wherein the destination end of the data to be sent is the third terminal.

Step 1002, the first terminal sends a resource request message to the second terminal, the resource request message is used to request sidelink resources, and the resource request message includes resource indication information, and the resource indication information is used to indicate that the first terminal recommends for sending The first sidelink resource of the data to be sent.

The resource request message may be an SCI, the resource indication information is carried in the SCI, and the "time and frequency resource assignment (time domain and frequency domain resource indication)" field in the first SCI in the SCI indicates the first side link The time-frequency location of the road resource.

In a possible embodiment, the size of the first sidelink resource may be the same as the size of the data to be sent. The method helps the second terminal to accurately select a sufficient number of resources to transmit the data to be sent, so as to avoid insufficient resources or waste of resources.

After the second terminal receives the resource indication information, it can select resources. See step 1003a for the first possible resource selection method; step 1003b for the second possible resource selection method; and step 1003c for the third possible resource selection method.

Step 1003a, after receiving the resource indication information, the second terminal determines the sending resource for transmitting the data to be sent according to the first sidelink resource and the second sidelink resource.

Specifically, for the specific manner in which the second terminal selects the sending resource for sidelink communication with the first terminal from the first candidate resource and the target second candidate resource, reference may be made to the first manner in step 704 above. or way two.

It can be seen that, in this manner, for the second terminal, when determining the transmission resources, not only the second sidelink resources that it has sensed, but also the first sidelink resources recommended by other terminals (such as the first terminal) are considered. Therefore, it is helpful for the second terminal to reduce the probability of collision between the resources independently selected by the second terminal and the resources of other terminals when the second terminal autonomously selects resources, thereby helping to improve the use of the transmission by the first terminal. The probability of successful resource communication.

Step 1003b, after receiving the resource indication information, the second terminal determines, according to the first sidelink resource, a sending resource for transmitting the data to be sent.

Specifically, the second terminal may select all or part of the resources from the first sidelink resources as the transmission resources, or the second terminal may select some resources from the first sidelink resources, and select the corresponding resources from the resource selection window. Select some candidate resources from the resource pool as sending resources.

It can be seen that in this manner, the first terminal selects to send data to the third terminal on the recommended transmission resources of the first sidelink resources, which helps to reduce the probability of the collision between the first terminal and other terminal resources.

Step 1003c, after receiving the resource indication information, the second terminal determines, according to the second sidelink resource, a sending resource for transmitting the data to be sent.

Specifically, the second terminal may select all or part of the resources from the second sidelink resources as the transmission resources, or the second terminal may select some resources from the second sidelink resources, and select the corresponding resources from the resource selection window. Select some candidate resources from the resource pool as sending resources.

In the above steps 1003a to 1003c, the second sidelink resource is a candidate resource obtained by the second terminal through listening, or a preconfigured resource, or a resource configured by a network device. Alternatively, the network device sends control information to the terminal device in advance, the control information configures a candidate resource pool, and the terminal device can determine the second sidelink resource from the candidate resource pool according to the listening result. In other words, the protocol predefines a candidate resource pool, and the terminal device can determine the second sidelink resource from the candidate resource pool according to the listening result. For the manner in which the second terminal obtains the second sidelink resource by listening to the resource pool of the resource selection window, reference may be made to the relevant introduction of the process of the terminal autonomously selecting resources in FIG. 4A , and details are not repeated here.

Step 1004, the second terminal sends the indication information of the sending resource to the first terminal.

Step 1005: After receiving the indication information of the sending resource from the second terminal, the first terminal sends data to the third terminal on the sending resource.

The step numbers of the flowcharts described in the embodiments of the present application are only an example of the execution flow, and do not constitute a restriction on the sequence of steps performed. There is no strict order of execution.

In the above embodiments provided by the present application, the resource selection method provided by the embodiments of the present application has been introduced from the perspective of the terminal as the execution subject. In order to implement the functions in the resource selection method provided by the above embodiments of the present application, the terminal may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

Similar to the concept of the foregoing embodiments, the embodiments of the present application further provide a first communication apparatus 1200, where the first communication apparatus 1200 is configured to implement the function of the first terminal in the foregoing method. For example, the first communication apparatus 1200 may be a first terminal, or may be a device in the first terminal. The apparatus may be a system-on-a-chip. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

In an example, as shown in FIG. 12A , the first communication device 1200 includes a processing unit 1201 and a transceiver unit 1202 .

For the method shown in FIG. 7 , the transceiver unit 1202 is configured to receive the first sideline control information from the second terminal; the first sideline control information is used to indicate the second terminal reserved for sidelink communication. a resource, and a first priority for indicating the data to be sent by the second terminal.

The transceiver unit 1202 is further configured to receive second sidelink control information from a third terminal, wherein the second sidelink control information is used to instruct the third terminal to reserve a second resource for sidelink communication, and It is used to indicate the second priority of the data to be sent by the third terminal.

The transceiver unit 1202 is further configured to send resource indication information from the first terminal to the second terminal when the first resource and the second resource overlap and the second priority is higher than the first priority , the resource indication information is used to indicate the third resource recommended by the first terminal for the second terminal.

In some embodiments, the third resource includes the remaining resources in the first resource except the second resource, and/or the third resource includes the resources in the resource listening window of the first terminal except for the For the resources other than the first resource and the second resource, the resource listening window is n time slots before the first terminal resource selection time point, where n is a positive integer.

In some embodiments, the size of the third resource is the same as the size of the data to be sent by the second terminal.

In an embodiment, the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal belongs to at least one scheduled terminal in the communication group.

In an embodiment, the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, the first terminal belongs to at least one scheduled terminal in the communication group, and The third terminal does not belong to the communication group.

For the specific execution process and beneficial effects of the processing unit 1201 and the transceiver unit 1202, reference may be made to the description of the method related to FIG. 7 above.

For the method shown in FIG. 10 above, the processing unit 1201 of the first communication device is configured to determine that the destination end is the data to be sent by the third terminal.

Transceiving unit 1202, configured to send a resource request message to the second terminal, where the resource request message is used to request sidelink resources, and the resource request message includes resource indication information, and the resource indication information is used to indicate the The first sidelink resource recommended by the first terminal for sending the data to be sent.

In some embodiments, the transceiving unit 1202 is further configured to receive indication information of a sending resource from the second terminal, where the sending resource is the second terminal according to the first sidelink resource and the second Determined by the sidelink resource, the second sidelink resource is a candidate resource obtained by the second terminal through listening, or a preconfigured resource, or a resource configured by a network device; the transceiver unit 1202 further uses sending data to the third terminal on the sending resource.

In some embodiments, the transceiver unit 1202 is further configured to receive indication information of a transmission resource from the second terminal, where the transmission resource is determined by the second terminal according to the first sidelink resource;

The transceiver unit 1202 is further configured to send data to the third terminal on the sending resource.

In some embodiments, the second terminal, the first terminal and the third terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal and the third terminal belong to at least two scheduled terminals in the communication group .

In some embodiments, the size of the first sidelink resource is the same as the size of the data to be sent.

For the specific execution process and beneficial effects of the processing unit 1201 and the transceiver unit 1202, reference may be made to the description in the method related to FIG. 10 .

This embodiment of the present application further provides a second communication apparatus 1300, where the second communication apparatus 1300 is configured to implement the function of the second terminal in the foregoing method. For example, the second communication apparatus 1300 may be a second terminal, or may be a device in the second terminal. The apparatus may be a system-on-a-chip. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

In an example, as shown in FIG. 12B , the second communication device 1300 includes a processing unit 1301 and a transceiver unit 1302 .

For the method shown in FIG. 9A, the processing unit 1301 of the second communication device 1300 is configured to determine a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or preconfigured , or configured by the network device.

The transceiver unit 1302 is configured to receive at least two resource indication information respectively from at least two first terminals, where the resource indication information is used to indicate a second candidate resource recommended by the first terminal for the second terminal.

The processing unit 1301 is further configured to determine a sending resource from the first candidate resource and at least two of the second candidate resources;

In some embodiments, the processing unit 1301 of the second communication device 1300 is configured to determine a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or pre-configured, or a network device configured.

The processing unit 1301 is further configured to determine a sending resource from the first candidate resource and the target second candidate resource;

For the specific execution process and beneficial effects of the processing unit 1301 and the transceiver unit 1302, reference may be made to the description in the method related to FIG. 9A above.

The division of modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods. In addition, the functional modules in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.

In yet another example, as shown in FIG. 12B , the first communication device 1200 or the second communication device 1300 includes at least one processor 1210 and a memory 1220 . Among them, the computer program is stored in the memory 1220 . Memory 1220 and processor 1210 are coupled. The coupling in the embodiments of the present application is the spaced coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information interaction between the devices, units or modules. As another implementation, the memory 1220 may also be located outside the first communication device 1200 or the second communication device 1300 . The processor 1210 may cooperate with the memory 1220. The processor 1210 may invoke computer programs stored in the memory 1220 . At least one of the at least one memory may be included in the processor.

In some embodiments, the first communication apparatus 1200 or the second communication apparatus 1300 may further include a communication interface 1230 for communicating with other devices through a transmission medium, so as to be used in the first communication apparatus 1200 or the second communication apparatus 1300 The device can communicate with other devices. Illustratively, the communication interface 1230 may be a transceiver, circuit, bus, module, or other type of communication interface, and the other device may be other terminal. The processor 1210 uses the communication interface 1230 to send and receive information, and is used to implement the methods in the above embodiments. Exemplarily, the communication interface 1230 is used for receiving resource indication information. In another example, the communication interface 1230 is used to transmit data.

In this embodiment of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement or The methods, steps and logic block diagrams disclosed in the embodiments of this application are executed. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

In this embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may also be a volatile memory (volatile memory), for example Random-access memory (RAM). Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing computer programs and/or data.

The methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server or data center by wire (eg coaxial cable, optical fiber, digital subscriber line, DSL for short) or wireless (eg infrared, wireless, microwave, etc.). The computer-readable storage medium can be any medium that can be accessed by a computer, or a data storage device such as a server, data center, etc. that includes one or more medium integrations. The medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, an SSD), or the like.

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

Claims

A resource indication method, comprising:

The first terminal receives first sidelink control information from the second terminal, where the first sidelink control information is used to instruct the second terminal to reserve the first resource for sidelink communication, and is used to instruct the second terminal the first priority of the data to be sent of the second terminal;

The first terminal receives the second sidelink control information from the third terminal, wherein the second sidelink control information is used to instruct the third terminal to reserve the second resource for sidelink communication, and use the for indicating the second priority of the data to be sent by the third terminal;

In the case that the first resource and the second resource overlap and the second priority is higher than the first priority, the first terminal sends resource indication information to the second terminal, and the The resource indication information is used to indicate the third resource recommended by the first terminal for the second terminal.
The method according to claim 1, wherein the third resource includes the remaining resources in the first resource except the second resource, and/or the third resource includes the first resource Resources other than the first resource and the second resource in the resource listening window of a terminal, the resource listening window is n time slots before the resource selection time point of the first terminal, and n is positive integer.
The method according to claim 1 or 2, wherein the size of the third resource is the same as the size of the data to be sent by the second terminal.
The method according to any one of claims 1 to 3, wherein the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal belongs to the same communication group At least one terminal in the communication group is scheduled.
The method according to claim 4, wherein the third terminal does not belong to the communication group.
A resource indication method, comprising:

The first terminal determines the data to be sent, and the destination end of the data to be sent is the third terminal;

The first terminal sends a resource request message to the second terminal, where the resource request message is used to request sidelink resources, and the resource request message includes resource indication information, and the resource indication information is used to indicate the first A first sidelink resource recommended by a terminal for sending the data to be sent.
The method of claim 6, comprising:

receiving, by the first terminal, indication information of a transmission resource from the second terminal, where the transmission resource is determined by the second terminal according to the first sidelink resource and the second sidelink resource, The second sidelink resource is a candidate resource obtained by the second terminal through listening, or a preconfigured resource, or a resource configured by a network device;

The first terminal sends data to the third terminal on the sending resource.
The method of claim 6, comprising:

receiving, by the first terminal, indication information of a sending resource from the second terminal, where the sending resource is determined by the second terminal according to the first sidelink resource;

The first terminal sends data to the third terminal on the sending resource.
The method according to any one of claims 6 to 8, wherein the second terminal, the first terminal and the third terminal belong to the same communication group, and the second terminal is a scheduling terminal, The first terminal and the third terminal belong to at least two scheduled terminals in the communication group.
The method according to any one of claims 6 to 9, wherein the size of the first sidelink resource is the same as the size of the data to be sent.
A resource selection method, characterized in that the method comprises:

The second terminal determines a first candidate resource, and the first candidate resource is obtained by the second terminal through listening, or preconfigured, or configured by a network device;

The second terminal receives at least two resource indication information respectively from at least two first terminals, where the resource indication information is used to indicate that the first terminal is a second candidate resource recommended by the second terminal;

determining, by the second terminal, a transmission resource from the first candidate resource and at least two of the second candidate resources;

The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals.
A resource selection method, characterized in that the method comprises:

The second terminal determines a first candidate resource, and the first candidate resource is obtained by the second terminal through listening, or preconfigured, or configured by a network device;

The second terminal receives at least two resource indication information respectively from at least two first terminals, where the resource indication information is used to indicate that the first terminal is a second candidate resource recommended by the second terminal;

determining, by the second terminal, a transmission resource from the first candidate resource and the target second candidate resource;

The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, the at least two first terminals are scheduled terminals, and the target second candidate The resource is the second candidate resource indicated by the resource indication information received most recently from the current moment.
A communication device, comprising: a transceiver unit and a processing unit;

The transceiver unit is configured to receive first sideline control information from the second terminal; the first sideline control information is used to instruct the second terminal to reserve the first resource for sidelink communication, and use in order to indicate the first priority of the data to be sent by the second terminal;

The transceiver unit is further configured to receive second sidelink control information from a third terminal, wherein the second sidelink control information is used to instruct the third terminal to reserve a second resource for sidelink communication , and a second priority for indicating the data to be sent by the third terminal;

When the processing unit determines that the first resource and the second resource overlap and the second priority is higher than the first priority, the transceiver unit is further configured to send the first resource to the first resource. The second terminal sends resource indication information, where the resource indication information is used to indicate the third resource recommended by the first terminal for the second terminal.
The communication apparatus according to claim 13, wherein the third resource includes remaining resources in the first resource except the second resource, and/or the third resource includes the resources other than the first resource and the second resource in the resource listening window of the first terminal, the resource listening window is n time slots before the resource selection time point of the first terminal, n is a positive integer.
The communication device according to claim 13 or 14, wherein the size of the third resource is the same as the size of the data to be sent by the second terminal.
The communication device according to any one of claims 13 to 15, wherein the second terminal and the first terminal belong to the same communication group, the second terminal is a scheduling terminal, and the first terminal at least one scheduled terminal belonging to the communication group.
The communication apparatus according to claim 16, wherein the third terminal does not belong to the communication group.
A communication device, comprising: a transceiver unit and a processing unit;

the processing unit, configured to determine the data to be sent, and the destination end of the data to be sent is a third terminal;

The transceiver unit is configured to send a resource request message to the second terminal, where the resource request message is used to request sidelink resources, and the resource request message includes resource indication information, and the resource indication information is used to indicate the the first sidelink resource recommended by the first terminal for sending the data to be sent.
The communication device according to claim 18, wherein:

The transceiver unit is further configured to receive indication information of a sending resource from the second terminal, where the sending resource is the second terminal based on the first sidelink resource and the second sidelink resource It is determined that the second sidelink resource is a candidate resource obtained by the second terminal through listening, or a preconfigured resource, or a resource configured by a network device;

The transceiver unit is further configured to send data to the third terminal on the sending resource.
The communication device according to claim 18, wherein:

The transceiver unit is further configured to receive indication information of a sending resource from the second terminal, where the sending resource is determined by the second terminal according to the first sidelink resource;

The transceiver unit is further configured to send data to the third terminal on the sending resource.
The communication device according to any one of claims 18 to 20, wherein the second terminal, the first terminal and the third terminal belong to the same communication group, and the second terminal is a scheduling terminal , the first terminal and the third terminal belong to at least two scheduled terminals in the communication group.
The communication apparatus according to any one of claims 18 to 21, wherein the size of the first sidelink resource is the same as the size of the data to be sent.
A communication device, characterized in that it includes a processing unit and a transceiver unit:

the processing unit, configured to determine a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or preconfigured, or configured by a network device;

The transceiver unit is configured to receive at least two resource indication information respectively from at least two first terminals, where the resource indication information is used to indicate that the first terminal is a second candidate resource recommended by the second terminal;

the processing unit, configured to determine a sending resource from the first candidate resource and at least two of the second candidate resources;

The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, and the at least two first terminals are scheduled terminals.
A communication device, characterized in that it includes a processing unit and a transceiver unit:

the processing unit, configured to determine a first candidate resource, where the first candidate resource is obtained by the second terminal through listening, or preconfigured, or configured by a network device;

The transceiver unit is configured to receive at least two resource indication information respectively from at least two first terminals, where the resource indication information is used to indicate that the first terminal is a second candidate resource recommended by the second terminal;

the processing unit, configured to determine a sending resource from the first candidate resource and the target second candidate resource;

The second terminal and the at least two first terminals belong to the same communication group, the second terminal is a scheduling terminal, the at least two first terminals are scheduled terminals, and the target second candidate The resource is the second candidate resource indicated by the resource indication information received most recently from the current moment.
A communication device, characterized in that it includes at least one processor, the at least one processor is connected to a memory, and the at least one processor is configured to read and execute a program stored in the memory, so that the device executes The method of any one of claims 1-5, or 6-10.
A communication device, characterized in that it includes at least one processor, the at least one processor is connected to a memory, and the at least one processor is configured to read and execute a program stored in the memory, so that the device executes A method as claimed in claim 11 or 12.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions, which, when executed on a computer, cause the computer to execute the method according to any one of claims 1-12.