WO2021148046A1 - Resource selection method and apparatus for sidelink communication - Google Patents

Abstract

Provided in the embodiments of the present application are a resource method and communication apparatus for sidelink communication. A first terminal device obtains available resources from at least one resource pool by means of sensing or CBR measurement to obtain at least one resource set, and sends indication information to a second terminal device so as to indicate the at least one resource set to at least one second terminal device, so that the second terminal device selects a suitable resource for sidelink communication from the at least one resource set when performing sidelink communication. By using the foregoing solution, since the resources comprised in the at least one resource set are available resources determined by the first terminal device by means of sensing or CBR measurement, the reliability of sidelink communication can be improved and the resource utilization rate can be increased.

Description

Resource selection method and device for auxiliary link communication

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010070297.4, and the application name is "Auxiliary Link Communication Resource Selection Method and Device" on January 21, 2020, the entire content of which is incorporated by reference In this application.

Technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a method and device for selecting resources for auxiliary link communication.

Background technique

Vehicle-to-X (V2X) communication is a key technical direction of the 16th (Release 16, R16) version of 3GPP. NR V2X, as an enhancement of Long Term Evolution (LTE) V2X, enables the Internet of Vehicles Key technical means.

In V2X communication, V2X devices perform auxiliary link communication through a sidelink. For V2X communication, there are two resource allocation methods. The first method is scheduled resource allocation. In this method, the network equipment uses dynamic signaling to schedule resources for auxiliary link communication; This method is based on the perception of resource selection, which does not require the base station to dynamically schedule resources. A simplified form of the perception of resource selection is the random selection of auxiliary link resources. In this method, network equipment configuration or pre-configuration Configure the resource pool for auxiliary link communication, and the V2X device at the sending end randomly selects resources for auxiliary link communication from the resource pool.

In the above-mentioned random selection method of auxiliary link resources, the V2X device performs random resource selection in the network device configuration or pre-configured resource pool. This random selection method cannot perform the selected resource range according to the resource occupation of the area where the V2X device is located. Flexible adjustment. When the resources in the network device configuration or the pre-configured resource pool are relatively small, the communication reliability of the auxiliary link between the V2X devices is poor.

Summary of the invention

The embodiments of the present application provide a method and device for selecting resources for auxiliary link communication. A first terminal device determines at least one resource set, and sends indication information to a second terminal device to indicate the at least one resource set, so that the second terminal The device selects the resources used for the auxiliary link communication. Since the resources included in the resource set are available resources determined by the first terminal device through sensing or CBR measurement, the reliability of the auxiliary link communication can be improved.

In the first aspect, an embodiment of the present application provides a resource selection method for auxiliary link communication, including:

The first terminal device determines at least one resource set, and the resources in the at least one resource set are available resources determined by the first terminal device;

The first terminal device sends indication information to the second terminal device through the secondary link, where the indication information is used to indicate the at least one resource set, and the indication information is carried on the secondary link physical layer data channel PSSCH.

In a feasible design, the first terminal device sending instruction information to the second terminal device through the auxiliary link includes:

The first terminal device broadcasts the indication information to the second terminal device through the auxiliary link.

In a feasible design, the above method also includes:

The first terminal device broadcasts a first identifier to the second terminal device through the secondary link, the first identifier is carried on the secondary link control information SCI, and the first identifier is used to communicate to the second terminal The device indicates that the indication information is carried on the PSSCH.

In a feasible design, the terminal device sending the indication information to the second terminal device through the auxiliary link includes:

The first terminal device multicasts the indication information to the second terminal device through the auxiliary link.

In a feasible design, the above method also includes:

The first terminal device multicasts a second identifier to each second terminal device in the multicast group through the secondary link, the second identifier is carried on the secondary link control information SCI, and the second identifier is used to indicate For the multicast group, the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH.

In a feasible design, the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set.

In a feasible design, the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate the identifier of the resource pool.

In a feasible design, determining at least one resource set by the first terminal device includes:

For each resource pool in at least one resource pool configured or pre-configured by a network device, the first terminal device obtains at least one available resource from the resource pool through sensing or channel busy rate CBR measurement to obtain the at least one resource pool. A collection of resources.

In the second aspect, an embodiment of the present application provides a resource selection method for auxiliary link communication, including:

The second terminal device receives the instruction information sent by the first terminal device via the secondary link, the instruction information is used to indicate the at least one resource set, and the resources in the at least one resource set are determined by the first terminal device Available resources, the indication information is carried on the secondary link physical layer data channel PSSCH;

Selecting, by the second terminal device, a resource for auxiliary link communication from the at least one resource set according to the indication information;

The second terminal device uses the resource to perform auxiliary link communication.

In a feasible design, the second terminal device receiving the instruction information sent by the first terminal device through the auxiliary link includes:

The second terminal device receives the instruction information sent by the first terminal device through the auxiliary link broadcast.

In a feasible design, the above method also includes:

The second terminal device receives the first identifier sent by the first terminal device through the secondary link broadcast, the first identifier is carried on the secondary link control information SCI, and the first identifier is used to communicate to the second terminal The device indicates that the indication information is carried on the PSSCH.

In a feasible design, the second terminal device receiving the instruction information sent by the first terminal device through the auxiliary link includes:

The second terminal device receives the instruction information sent by the first terminal device through the auxiliary link multicast.

In a feasible design, the above method also includes:

The second terminal device receives a second identifier sent by the first terminal device via secondary link multicast, the second identifier is carried on the secondary link control information SCI, and the second identifier is used to indicate the In the multicast group where the second terminal device is located, the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH.

In a feasible design, the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set.

In a feasible design, the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate the identifier of the resource pool.

In a third aspect, an embodiment of the present application provides a communication device, including:

A processing unit, configured to determine at least one resource set, where resources in the at least one resource set are available resources determined by the first terminal device;

The transceiver unit is configured to send indication information to the second terminal device through the secondary link, where the indication information is used to indicate the at least one resource set, and the indication information is carried on the secondary link physical layer data channel PSSCH.

In a feasible design, the transceiver unit is configured to broadcast the indication information to the second terminal device through an auxiliary link.

In a feasible design, the transceiver unit is further configured to broadcast a first identifier to the second terminal device, the first identifier is carried on the secondary link control information SCI, and the first identifier is used to broadcast The second terminal device instructs the PSSCH to carry the indication information.

In a feasible design, the transceiver unit is configured to multicast the indication information to the second terminal device through an auxiliary link.

In a feasible design, the transceiver unit is further configured to multicast a second identifier to each second terminal device in the multicast group through the secondary link, and the second identifier is carried on the secondary link control information SCI The second identifier is used to indicate the multicast group, and the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH.

In a feasible design, the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set.

In a feasible design, the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate the identifier of the resource pool.

In a feasible design, the processing unit is configured for each resource pool in at least one resource pool configured or pre-configured for a network device, and the first terminal device senses or channel busy from the resource pool. Rate CBR measurement to obtain at least one available resource to obtain the at least one resource set.

In a fourth aspect, an embodiment of the present application provides a communication device, including:

The transceiving unit is configured to receive indication information sent by the first terminal device via the secondary link, where the indication information is used to indicate the at least one resource set, and the resources in the at least one resource set are determined by the first terminal device The available resources of, the indication information is carried on the secondary link physical layer data channel PSSCH;

A processing unit, configured to select a resource for auxiliary link communication from the at least one resource set according to the instruction information;

The transceiver unit is also configured to use the resource to perform auxiliary link communication.

In a feasible design, the transceiver unit is configured to receive the indication information broadcasted by the first terminal device through the auxiliary link.

In a feasible design, the transceiving unit is further configured to receive a first identifier sent by the first terminal device through a secondary link broadcast, and the first identifier is carried on the secondary link control information SCI, and the The first identifier is used to indicate to the second terminal device that the indication information is carried on the PSSCH.

In a feasible design, the transceiving unit is configured to receive the instruction information sent by the first terminal device through the auxiliary link multicast.

In a feasible design, the transceiver unit is further configured to receive a second identifier sent by the first terminal device via a secondary link multicast, and the second identifier is carried on the secondary link control information SCI, so The second identifier is used to indicate the multicast group where the second terminal device is located, and the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH.

In a feasible design, the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set.

In a feasible design, the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate the identifier of the resource pool.

In a fifth aspect, an embodiment of the present invention provides an electronic device, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the processor executes the program, the first Aspects or methods in the various possible implementations of the first aspect.

In a sixth aspect, an embodiment of the present invention provides an electronic device, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the processor executes the program, the second Aspect or the methods in the various possible implementations of the second aspect.

In a seventh aspect, the embodiments of the present application provide a computer program product containing instructions, which when run on an electronic device, cause the electronic device computer to execute the above-mentioned first aspect or the methods in the various possible implementations of the first aspect .

In an eighth aspect, embodiments of the present application provide a computer program product containing instructions that, when run on an electronic device, enable the electronic device to execute the above-mentioned second aspect or the methods in the various possible implementations of the second aspect.

In a ninth aspect, an embodiment of the present application provides a readable storage medium that stores instructions in the readable storage medium, which when run on an electronic device, causes the electronic device to execute the above-mentioned first aspect or the first aspect. Methods in various possible implementations.

In a tenth aspect, an embodiment of the present application provides a readable storage medium that stores instructions in the readable storage medium, which when run on an electronic device, causes the electronic device to execute the above-mentioned second aspect or the second aspect. Methods in various possible implementations.

In the resource method and communication device for auxiliary link communication provided in the embodiments of the present application, the first terminal device senses available resources from at least one resource pool to obtain at least one resource set, and sends indication information to the second terminal device to send indication information to at least one first terminal device. The second terminal device indicates the at least one resource set, so that the second terminal device selects a suitable resource from the at least one resource set for auxiliary link communication when performing auxiliary link communication. With this solution, since the resources included in the at least one resource set are available resources perceived by the first terminal device, the reliability of the auxiliary link communication and the resource utilization rate can be improved.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1A is a schematic diagram of a network architecture to which the method for selecting communication resources of a secondary link provided by an embodiment of the present application is applicable;

FIG. 1B is a schematic diagram of a network architecture to which the method for selecting communication resources of a secondary link provided by an embodiment of the present application is applicable;

FIG. 2 is a flowchart of a method for selecting resources for auxiliary link communication according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a method for selecting resources for auxiliary link communication provided by an embodiment of the present application applied to a V2P scenario;

FIG. 4 is a schematic diagram of a resource set in a method for selecting a resource for auxiliary link communication provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In V2X communication, from the perspective of whether network equipment is required to be scheduled through dynamic signaling, the resource allocation method is divided into a scheduling resource allocation method and a secondary link resource awareness selection method. Among them, a simplified form of the auxiliary link resource perception selection method is the method of directly selecting randomly without perception. The network device configuration or pre-configuration of the resource pool for auxiliary link communication requires the V2X device to perform auxiliary link communication from Resources used for auxiliary link communication are randomly selected from the resource pool. In this process, because in at least one of the configured resource pools, the resource range randomly selected by the user cannot be flexibly adjusted according to the resource occupancy of the area where the V2X device is located. When the network device is configured or the resources in the pre-configured resource pool When it is relatively small, the communication reliability of the auxiliary link between the V2X devices is poor; at the same time, the problem of low resource utilization may also occur. For example, in the random selection method of auxiliary link resources, the network device is pre-configured with 3 resource pools, namely resource pool 1, resource pool 2, and resource pool 3. Among them, most of the resources in resource pool 1 and resource pool 2 have been Occupied, there are many idle resources in resource pool 3. When a V2X device randomly selects resources for secondary link communication, the probability of the resources in each resource pool being selected is one-third, resulting in resource pool 3. The resource utilization rate is low.

In view of this, an embodiment of the present application provides a resource selection method for secondary link communication. The first terminal device determines the available resources from the resource pool through sensing or channel busy ratio (CBR) measurement results. Obtain at least one resource set, and send indication information to the second terminal device to indicate the at least one resource set, so that the second terminal device can select a resource for auxiliary link communication from the at least one resource set, and then communicate with the first terminal device. Terminal equipment or other terminal equipment performs auxiliary link communication.

First, the terms involved in the embodiments of the present application are explained.

The first terminal device, a terminal device that performs sensing or CBR measurement on at least one resource pool, determines available resources from the at least one resource pool to obtain at least one resource set. For example, a certain resource pool contains 100 resources, and the first terminal device determines 30 available resources from them to obtain a resource set. Among them, at least one resource pool may be configured by a network device or configured in advance. The first terminal device may be, for example, a terminal device that is not sensitive to power consumption, such as a road side unit (RSU).

The second terminal device requires resources for auxiliary link communication. For example, a terminal device that needs to send or receive data through the auxiliary link, the object of the auxiliary link communication may be the first terminal device or other terminal devices. The second terminal device may be, for example, a terminal device that is sensitive or insensitive to power consumption.

Secondly, the network architecture to which the embodiments of this application apply.

FIG. 1A is a schematic diagram of a network architecture to which the method for selecting a secondary link communication resource provided by an embodiment of the present application is applicable. Referring to FIG. 1A, the network architecture includes a first terminal device and at least one second terminal device. Among them, both the first terminal device and the second terminal device can use the sidelink to communicate. The auxiliary link can also be called a direct link, a unilateral link, etc., and the auxiliary link communication can also be called a direct Communication etc. For example, the first terminal device may communicate with any second terminal device through the auxiliary link; for another example, each second terminal device may communicate with each other through the auxiliary link. The first terminal device senses the available resources in the resource pool to obtain a resource set, and indicates the resource sets to the second terminal device, so that the second terminal device selects available resources from the resource sets to perform auxiliary link communication.

FIG. 1B is a schematic diagram of a network architecture to which the method for selecting communication resources of a secondary link provided by an embodiment of the present application is applicable. Please refer to Figure 1B, the network architecture is applied to NR V2X communication. NR V2X communication includes the communication between vehicle and vehicle (V2V) and the communication between vehicle and roadside infrastructure (V2I). , Vehicle to pedestrian (V2P) communication, vehicle to network (V2N) communication, etc. The aforementioned vehicle-to-everything communication is collectively referred to as V2X (X stands for anything) communication. The first terminal device is, for example, a road side unit (RSU) and other terminal devices that are not sensitive to power consumption, and the second terminal device is, for example, a vehicle, pedestrian terminal device, road side unit (RSU), etc. Any of the terminal devices that are sensitive or insensitive to power consumption.

Hereinafter, based on the above-mentioned noun explanation and the network architecture shown in Fig. 1A and Fig. 1B, the resource selection method of the auxiliary link communication described in the embodiment of the present application will be described in detail. For example, see Figure 2. FIG. 2 is a flowchart of a method for selecting resources for secondary link communication according to an embodiment of the present application. This embodiment is described from the perspective of interaction between a first terminal device and a second terminal device. This embodiment includes:

101. The first terminal device determines at least one resource set, and resources in the at least one resource set are available resources determined by the first terminal device.

Exemplarily, the at least one resource set is obtained by the first terminal device through sensing or CBR measurement of resources in the at least one resource pool. For example, the network device configures or pre-configures one or more resource pools. For each resource pool, the first terminal device adopts a sensing method to exclude the resources that may be occupied in the resource pool, and use all or part of the remaining resources as a resource set , To obtain at least one resource set; or, the first terminal device uses the CBR measurement method to select a resource pool from at least one resource pool, and use the resource pool as a resource set. In this case, the resource set is one. In addition, when the first terminal device adopts the CBR measurement mode, multiple resource pools can also be selected from them, and each resource pool is used as the above-mentioned resource set, so as to obtain at least one resource set. The advantage of this method is that although the first terminal device regards all resources in a certain resource pool as a resource set, since only one resource set and one resource pool are indicated, the signaling overhead of the first terminal device is small.

102. The first terminal device sends indication information to the second terminal device through the secondary link, where the indication information is used to indicate the at least one resource set, and the indication information is carried on the secondary link physical layer data channel PSSCH .

Correspondingly, the second terminal device receives the instruction information sent by the first terminal device through the secondary link, and the instruction information is carried on the secondary link physical layer data channel (physical sidelink shared channel, PSSCH).

In the embodiment of the present application, sending the instruction information by the first terminal device to the second terminal device means that the first terminal device sends the PSSCH carrying the instruction information to the second terminal device.

For example, the first terminal device broadcasts indication information to each second terminal device through the auxiliary link, that is, the first terminal device broadcasts the PSSCH carrying the indication information. In order to inform the second terminal device that the indication information is carried on the PSSCH, the first terminal device also broadcasts a first identifier to the second terminal device through the secondary link. The first identifier is carried in the sidelink control information (SCI). ), the SCI is sent through the secondary link physical layer control channel (physical sidelink control channel, PSCCH).

For another example, the first terminal device multicasts the indication information to each second terminal device in a multicast group through the auxiliary link, that is, the first terminal device multicasts the PSSCH carrying the indication information. In order to inform the second terminal device in the multicast group that the indication information is carried on the PSSCH and which multicast group is the target, the first terminal device also multicasts a second identifier to each multicast group through the auxiliary link, the second identifier It is carried on the secondary link control information (sidelink control information, SCI). The SCI is sent through the secondary link physical layer control channel (PSCCH). The second identifier is used to indicate the multicast group, and the second identifier is used to indicate the multicast group. The identifier is also used to indicate to the second terminal device that the indication information is carried on the PSSCH.

103. The second terminal device selects a resource for auxiliary link communication from the at least one resource set according to the indication information.

Exemplarily, after receiving the indication information, the second terminal device determines at least one resource set according to the indication information, and selects a resource for auxiliary link communication from it, and the resource may be, for example, a time-frequency resource. In addition, when the indication information is sent by multicast, it means that the at least one resource set is shared by each second terminal device in the multicast group. In order to avoid resource collisions between different second terminal devices, each second terminal device can also sense The method selects the resource for auxiliary link communication from at least one resource set.

104. The second terminal device uses the resource to perform auxiliary link communication.

Exemplarily, after the second terminal device selects a resource for auxiliary link communication from at least one resource set, it uses the resource to perform auxiliary link communication with the first terminal device or other terminal devices.

In the method for selecting resources for auxiliary link communication provided in the embodiments of the present application, the first terminal device obtains at least one resource set by obtaining available resources from at least one resource pool through sensing or CBR measurement, and sends indication information to the second terminal device to At least one second terminal device indicates the at least one resource set, so that the second terminal device selects a suitable resource from the at least one resource set for auxiliary link communication when performing auxiliary link communication. With this solution, since the resources included in the at least one resource set are available resources determined by the first terminal device through sensing or CBR measurement, the reliability of the auxiliary link communication and the resource utilization rate can be improved.

FIG. 3 is a schematic diagram of a method for selecting resources for auxiliary link communication provided by an embodiment of the present application applied to a V2P scenario. Please refer to Figure 3, the first terminal device is the terminal device 1, which can be a user such as RSU that can transmit information to the P device through the PC5 port, where the P device refers to a pedestrian device in V2P communication, and it can also transmit information through the PC5 port. It is understood as the transmission of information through the auxiliary link. The second terminal device is, for example, terminal device 2 to terminal device 5. It can be a pedestrian device in V2P communication, such as a pedestrian's mobile phone and other devices capable of receiving information through the PC5 port, and it can also receive information through the PC5 port. It is understood as receiving information through the auxiliary link. Since the second terminal device is more sensitive to power consumption, it uses a random selection method of auxiliary link resources to select resources for auxiliary link communication. In order to solve the problem that the random resource selection range of the secondary link cannot be optimized, in the embodiment of the present application, the first terminal device is set at an intersection, and the first terminal device periodically senses or determines the available resources in the resource pool through CBR measurement to obtain at least A resource set, and then the first terminal device informs the second terminal device of the newly determined resource set through the instruction information, that is, when the terminal device 2-5 drives near the intersection, it receives the instruction information sent by the first terminal, so that the terminal Devices 2 to 5 select resources for auxiliary link communication from at least one resource set, and send their own location information, speed information, travel direction, etc. to other terminal devices on the selected resources to reduce collisions with other vehicles risks of. For example, the terminal device 2 selects resources for auxiliary link communication from at least one resource set, and sends its own location information, driving direction and other information to other vehicle terminal devices through the selected resources, so as to prevent the terminal device 2 from interacting with other vehicle terminal devices. Other vehicle terminal equipment collided.

In a feasible implementation manner, the indication information is used to indicate time domain information and frequency domain information of each resource in the at least one resource set. In this implementation, the resources contained in a resource set can be determined by time domain information and frequency domain information. The time domain information is all the time slots contained in the resource set in the time domain, and the frequency domain information is the frequency domain information of the resource set. All resource blocks (RB) and subchannels (subchannels) included in the domain. Exemplarily, refer to FIG. 4, which is a schematic diagram of a resource set in a resource selection method for auxiliary link communication provided in an embodiment of the present application. Referring to Figure 4, in NR V2X communication, the time domain granularity of a resource pool is slot (slot), the frequency domain granularity is subchannel (subchannel), and a subchannel contains m resource blocks (RB). m is a high-level configuration. Assuming that the time domain position of the resource pool is t ₁ ～t _n , and the frequency domain position is subchannel1～subchannel10, the first terminal device perceives that the occupied resources in the resource pool include time slot t through a local or global perception method. _{All time-frequency resources on n-2} , and the time-domain position is time slot t _n-5 , and the frequency-domain position is subchannel5～subchannel10, as shown in the hatched part of the figure, the resource set obtained by the first terminal device includes All or part of the time-frequency resources are not occupied in the resource pool. For example, the time domain information indicated by the indication information is t ₁ to t _n-6 , and the frequency domain information is subchannel4 to subchannel10, indicating that the first terminal device uses part of the unoccupied time-frequency resources as resources in the resource set, as shown in the figure The horizontal line fills the part as shown.

When the first terminal device sends the instruction information to each second terminal device, it can be sent in a multicast mode or a broadcast mode. When sending in broadcast mode, the first terminal device uses scheduling or random selection of auxiliary link resources to select resources for auxiliary link communication, and uses the resources to send PSCCH and/or PSSCH, where the PSSCH carries indication information , SCI is carried on the PSCCH, and the first identifier is carried on the SCI, which is used to inform the second terminal that the indication information carried on the PSSCH is used to indicate one or more resource sets. When sending in multicast mode, the first terminal device uses scheduling or random selection of auxiliary link resources to select resources for auxiliary link communication, and uses the resources to send PSCCH and/or PSSCH, where the PSSCH bears indication Information, the PSCCH carries the SCI, and the second identifier is carried on the SCI, which is used to inform the second terminal that the indication information carried on the PSSCH is used to indicate one or more resource sets and multicast groups. After receiving the instruction information, the second terminal device determines whether it belongs to the multicast group. If it is a member of the multicast group, it can determine at least one resource set according to the instruction information, and select a resource set for auxiliary link communication from it. Resources, if they are not members of the multicast group, they cannot use resources in at least one resource set.

In another feasible implementation manner, the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate the identifier of the resource pool. In this implementation manner, which resources are in a resource pool are agreed in advance, and the appointment information is pre-configured on the first terminal device and the second terminal device, or the network device periodically broadcasts to the first terminal device and the second terminal device. The second terminal device. The first terminal device may send indication information to the second terminal device through secondary link high-level signaling, for example, the secondary link media access control (MAC) control element (CE). When the first terminal device sends the instruction information to each second terminal device, it may be sent in a multicast mode or a broadcast mode. When sending by broadcast, the first terminal device uses the scheduling method (also referred to as mode 1 in NR V2X communication) or the random selection method of secondary link resources (also referred to as mode 2 in NR V2X communication) to select Secondary link communication resources, which are used to send PSCCH and/or PSSCH, where the PSSCH carries indication information, the PSCCH carries the SCI, and the SCI carries the first identifier, which is used to inform the second terminal of the indication carried on the PSSCH The information is used to indicate the resource pool identifier. When sending in multicast mode, the first terminal device uses scheduling or random selection of auxiliary link resources to select resources for auxiliary link communication, and uses the resources to send PSCCH and/or PSSCH, where the PSSCH bears indication Information, the PSCCH carries the SCI, and the second identifier is carried on the SCI, which is used to inform the second terminal that the indication information carried on the PSSCH is used to indicate one or more resource sets and multicast groups. After receiving the instruction information, the second terminal device determines whether it belongs to the multicast group. If it is a member of the broadcast group, it can determine the resource pool corresponding to the resource pool identifier according to the instruction information, and select it for the secondary chain. If the resource of the channel communication is not a member of the multicast group, the resource pool corresponding to the resource pool identifier cannot be used.

The following are device embodiments of this application, which can be used to implement the method embodiments of this application. For details that are not disclosed in the device embodiments of this application, please refer to the method embodiments of this application.

FIG. 5 is a schematic structural diagram of a communication device provided by an embodiment of this application. The communication device 100 may be implemented in software and/or hardware. As shown in FIG. 5, the communication device 100 includes:

The processing unit 11 is configured to determine at least one resource set, and the resources in the at least one resource set are available resources determined by the first terminal device;

The transceiver unit 12 is configured to send indication information to the second terminal device through the secondary link, the indication information is used to indicate the at least one resource set, and the indication information is carried on the secondary link physical layer data channel PSSCH.

In a feasible design, the transceiver unit 12 is configured to broadcast the indication information to the second terminal device through an auxiliary link.

In a feasible design, the transceiving unit 12 is further configured to broadcast a first identifier to the second terminal device, the first identifier is carried on the secondary link control information SCI, and the first identifier is used for Instruct the second terminal device to carry the indication information on the PSSCH.

In a feasible design, the transceiver unit 12 is configured to multicast the indication information to the second terminal device through a secondary link.

In a feasible design, the transceiving unit 12 is also configured to multicast a second identifier to each second terminal device in the multicast group through the secondary link, and the second identifier is carried in the secondary link control information SCI Above, the second identifier is used to indicate the multicast group, and the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH.

In a feasible design, the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set.

In a feasible design, the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate the identifier of the resource pool.

In a feasible design, the processing unit 11 is configured for each resource pool in at least one resource pool configured or pre-configured for a network device, and the first terminal device senses or channels from the resource pool. The busy rate CBR measurement obtains at least one available resource to obtain the at least one resource set.

The communication device provided in the embodiment of the present application can perform the actions of the first terminal device in the foregoing embodiment, and its implementation principles and technical effects are similar, and details are not described herein again.

FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the application. The communication device 200 may be implemented in software and/or hardware. As shown in FIG. 6, the communication device 200 includes:

The transceiving unit 21 is configured to receive indication information sent by the first terminal device through the secondary link, the indication information is used to indicate the at least one resource set, and the resource in the at least one resource set is the first terminal device The determined available resource, the indication information is carried on the secondary link physical layer data channel PSSCH;

The processing unit 22 is configured to select a resource for auxiliary link communication from the at least one resource set according to the indication information;

The transceiver unit 21 is also configured to use the resources to perform auxiliary link communication.

In a feasible design, the transceiver unit 21 is configured to receive the indication information broadcasted by the first terminal device via the auxiliary link.

In a feasible design, the transceiving unit 21 is further configured to receive the first identifier sent by the first terminal device through the secondary link broadcast, and the first identifier is carried on the secondary link control information SCI, so The first identifier is used to indicate to the second terminal device that the indication information is carried on the PSSCH.

In a feasible design, the transceiving unit 21 is configured to receive the instruction information sent by the first terminal device through the auxiliary link multicast.

In a feasible design, the transceiving unit 21 is further configured to receive a second identifier sent by the first terminal device via secondary link multicast, and the second identifier is carried on the secondary link control information SCI, The second identifier is used to indicate a second terminal device in the multicast group, and the second identifier is also used to indicate to the second terminal device that the indication information is carried on the PSSCH.

In a feasible design, the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set.

In a feasible design, the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate the identifier of the resource pool.

The communication device provided in the embodiment of the present application can perform the actions of the second terminal device in the foregoing embodiment, and its implementation principles and technical effects are similar, and details are not described herein again.

It should be noted that it should be understood that the above transceiving unit may be a transceiver in actual implementation, and the processing unit may be implemented in a form of software calling through processing elements; it may also be implemented in a form of hardware. For example, the processing unit may be a separate processing element, or it may be integrated in a chip of the above-mentioned device for implementation. In addition, it may also be stored in the memory of the above-mentioned device in the form of program code, and a certain processing element of the above-mentioned device Call and execute the functions of the above processing unit. In addition, all or part of these units can be integrated together or implemented independently. The processing element described here may be an integrated circuit with signal processing capability. In the implementation process, each step of the above method or each of the above units can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.

For example, the above units may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASIC), or one or more microprocessors (Digital Signal Processor, DSP), or, one or more Field Programmable Gate Array (Field Programmable Gate Array, FPGA), etc. For another example, when one of the above units is implemented in the form of processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program codes. For another example, these units can be integrated together and implemented in the form of System-On-a-Chip (SOC).

FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the application. The electronic device may be the aforementioned first terminal device or second terminal device. As shown in FIG. 7, the electronic device 300 includes:

Processor 31 and memory 32;

The memory 32 stores computer execution instructions;

The processor 31 executes the computer-executable instructions stored in the memory 32, so that the processor 31 executes the resource selection method of the auxiliary link communication performed by the first terminal device or the auxiliary link communication performed by the second terminal device. Resource selection method.

For the specific implementation process of the processor 31, reference may be made to the foregoing method embodiments, and the implementation principles and technical effects are similar, and will not be repeated in this embodiment.

Optionally, the electronic device 300 further includes a communication component 33. Among them, the processor 31, the memory 32, and the communication component 33 may be connected by a bus 34.

The embodiment of the present application further provides a readable storage medium, the readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the auxiliary link communication performed by the first terminal device as above. The resource selection method or the resource selection method of the auxiliary link communication performed by the second terminal device.

The embodiment of the present application also provides a computer program product, when the computer program product runs on the core network device, it is used to implement the resource selection method of the auxiliary link communication executed by the core network device; or, when the computer program When running on the second terminal device, it is used to implement the resource selection method of the auxiliary link communication performed by the second terminal device.

A person of ordinary skill in the art can understand that all or part of the steps in the foregoing method embodiments can be implemented by a program instructing relevant hardware. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, it executes the steps including the foregoing method embodiments; and the foregoing storage medium includes: ROM, RAM, magnetic disk, or optical disk and other media that can store program codes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope.

Claims (32)

A resource selection method for auxiliary link communication is characterized in that it includes: The first terminal device determines at least one resource set, and the resources in the at least one resource set are available resources determined by the first terminal device; The first terminal device sends indication information to the second terminal device through the secondary link, where the indication information is used to indicate the at least one resource set, and the indication information is carried on the secondary link physical layer data channel PSSCH. The method according to claim 1, wherein the first terminal device sending instruction information to the second terminal device via a secondary link comprises: The first terminal device broadcasts the indication information to the second terminal device through the auxiliary link. The method according to claim 2, further comprising: The first terminal device broadcasts a first identifier to the second terminal device through the secondary link, the first identifier is carried on the secondary link control information SCI, and the first identifier is used to communicate to the second terminal The device indicates that the indication information is carried on the PSSCH. The method according to claim 1, wherein the terminal device sending instruction information to the second terminal device via the secondary link comprises: The first terminal device multicasts the indication information to the second terminal device through the auxiliary link. The method according to claim 4, further comprising: The first terminal device multicasts a second identifier to each second terminal device in the multicast group through the secondary link, the second identifier is carried on the secondary link control information SCI, and the second identifier is used to indicate For the multicast group, the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH. The method according to any one of claims 1 to 5, wherein the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set. The method according to any one of claims 1 to 5, wherein the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate all The identification of the resource pool. The method according to any one of claims 1 to 5, wherein the first terminal device determining at least one resource set comprises: For each resource pool in at least one resource pool configured or pre-configured by a network device, the first terminal device obtains at least one available resource from the resource pool through sensing or channel busy rate CBR measurement to obtain the at least one resource pool. A collection of resources. A resource selection method for auxiliary link communication is characterized in that it includes: The second terminal device receives the indication information sent by the first terminal device via the auxiliary link, the indication information is used to indicate at least one resource set, and the resources in the at least one resource set are available resources determined by the first terminal device , The indication information is carried on the secondary link physical layer data channel PSSCH; Selecting, by the second terminal device, a resource for auxiliary link communication from the at least one resource set according to the indication information; The second terminal device uses the resource to perform auxiliary link communication. The method according to claim 9, wherein the receiving, by the second terminal device, the instruction information sent by the first terminal device via the secondary link, comprises: The second terminal device receives the instruction information sent by the first terminal device through the auxiliary link broadcast. The method according to claim 10, further comprising: The second terminal device receives the first identifier sent by the first terminal device through the secondary link broadcast, the first identifier is carried on the secondary link control information SCI, and the first identifier is used to communicate to the second terminal The device indicates that the indication information is carried on the PSSCH. The method according to claim 11, wherein the receiving, by the second terminal device, the instruction information sent by the first terminal device via the secondary link, comprises: The second terminal device receives the instruction information sent by the first terminal device through the auxiliary link multicast. The method according to claim 12, further comprising: The second terminal device receives a second identifier sent by the first terminal device via secondary link multicast, the second identifier is carried on the secondary link control information SCI, and the second identifier is used to indicate the In the multicast group where the second terminal device is located, the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH. The method according to any one of claims 9 to 13, wherein the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set. The method according to any one of claims 9 to 13, wherein the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate all The identification of the resource pool. A communication device, characterized in that it comprises: A processing unit, configured to determine at least one resource set, where resources in the at least one resource set are available resources determined by the first terminal device; The transceiver unit is configured to send indication information to the second terminal device through the secondary link, where the indication information is used to indicate the at least one resource set, and the indication information is carried on the secondary link physical layer data channel PSSCH. The device of claim 16, wherein: The transceiver unit is configured to broadcast the indication information to the second terminal device through an auxiliary link. The device of claim 17, wherein: The transceiving unit is further configured to broadcast a first identifier to the second terminal device, the first identifier is carried on the secondary link control information SCI, and the first identifier is used to indicate to the second terminal device The indication information is carried on the PSSCH. The device of claim 16, wherein: The transceiving unit is configured to multicast the indication information to the second terminal device through an auxiliary link. The device of claim 19, wherein: The transceiving unit is further configured to multicast a second identifier to each second terminal device in the multicast group through the secondary link, the second identifier is carried on the secondary link control information SCI, and the second identifier is used for To indicate the multicast group, the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH. The apparatus according to any one of claims 16 to 20, wherein the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set. The apparatus according to any one of claims 16 to 20, wherein the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate all The identification of the resource pool. The device according to any one of claims 16 to 20, wherein: The processing unit is configured for each resource pool in at least one resource pool configured or pre-configured for a network device, and the first terminal device obtains at least one available resource from the resource pool through sensing or channel busy rate CBR measurement Resources to obtain the at least one resource set. A communication device, characterized in that it comprises: The transceiver unit is configured to receive indication information sent by the first terminal device through the auxiliary link, where the indication information is used to indicate at least one resource set, and the resources in the at least one resource set are available as determined by the first terminal device Resource, the indication information is carried on the secondary link physical layer data channel PSSCH; A processing unit, configured to select a resource for auxiliary link communication from the at least one resource set according to the instruction information; The transceiver unit is also configured to use the resource to perform auxiliary link communication. The device of claim 24, wherein: The transceiving unit is configured to receive the instruction information sent by the first terminal device through the auxiliary link broadcast. The device of claim 25, wherein: The transceiving unit is further configured to receive a first identifier sent by the first terminal device via a secondary link broadcast, the first identifier is carried on the secondary link control information SCI, and the first identifier is used to send The second terminal device indicates that the indication information is carried on the PSSCH. The device of claim 24, wherein: The transceiving unit is configured to receive the instruction information sent by the first terminal device through the auxiliary link multicast. The device of claim 27, wherein: The transceiving unit is further configured to receive a second identifier sent by the first terminal device through secondary link multicast, the second identifier is carried on the secondary link control information SCI, and the second identifier is used to indicate In the multicast group where the second terminal device is located, the second identifier is also used to indicate to the multicast group that the indication information is carried on the PSSCH. The apparatus according to any one of claims 24 to 28, wherein the indication information is used to indicate time domain information and frequency domain information of each resource set in the at least one resource set. The apparatus according to any one of claims 24 to 28, wherein the resource set is one, the resource set is one resource pool in the at least one resource pool, and the indication information is used to indicate all The identification of the resource pool. An electronic device, characterized by comprising a processor, a memory, and a computer program; wherein the computer program is stored in the memory and is configured to be executed by the processor, and the computer program includes Instructions for executing the method according to any one of claims 1-8; or, the computer program includes instructions for executing the method according to any one of claims 9-15. A readable storage medium, characterized in that instructions are stored in the readable storage medium, which when run on an electronic device, cause the electronic device to execute the instruction of the method according to any one of claims 1-8 Or, an instruction that causes the electronic device to execute the method according to any one of claims 9-18.

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