WO2023151466A1

WO2023151466A1 - Data transmission method, apparatus, and system

Info

Publication number: WO2023151466A1
Application number: PCT/CN2023/073341
Authority: WO
Inventors: 李翔宇; 彭文杰; 赵力
Original assignee: 华为技术有限公司
Priority date: 2022-02-08
Filing date: 2023-01-20
Publication date: 2023-08-17
Also published as: CN116614893A

Abstract

The present application relates to the technical field of wireless communications, and provides a data transmission method, apparatus, and system, used for improving transmission performance between terminal devices. The method comprises: a first terminal device determines an order of IUC information in SL LCP according to at least one of a first priority value and a second priority value, and a priority value of the IUC information of the first terminal device; and the first terminal device transmits an SL MAC PDU to a second terminal device. According to the described solution, the first terminal device can determine the order of the IUC information in the SL LCP according to the priority value of the IUC information and the priority values of one or more STCHs, so that the transmission of the IUC information can be more reasonably ensured, and the transmission performance of the IUC information is improved.

Description

A data transmission method, device and system

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202210119405.1 and the application title "A Data Transmission Method, Device and System" submitted to the China Patent Office on February 08, 2022, the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the technical field of wireless communication, and in particular to a data transmission method, device and system.

Background technique

Currently, in a sidelink (sidelink, SL) communication system, a terminal device may receive the SL resource pool configuration from a network device, or obtain the SL resource pool configuration from pre-configuration. Then, the terminal device selects an SL resource from the SL resource pool for communication.

In order to improve the communication performance, an enhanced resource allocation scheme for inter-UE coordination (IUC) information is introduced. In this solution, the first terminal device mainly sends preferred resources (preferred resources) or non-preferred resources (or not preferred resources) to the second terminal device. Wherein, the first terminal device may carry the IUC information through an SL media access control (media access control, MAC) control element (control element, CE).

If the IUC information cannot be transmitted, it will affect the communication performance between terminal devices. Therefore, how to improve the performance of transmitting IUC information has become an urgent problem to be solved.

Contents of the invention

The present application provides a data transmission method, device and system for improving the performance of transmitting IUC information.

In a first aspect, a data transmission method is provided. The method may be executed by the first terminal device, or by a chip similar to the function of the first terminal device. In this method, the first terminal device determines the IUC information in the SL logical channel priority (logical The sequence in channel prioritization, LCP). The first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the second priority value is the priority value of one or more side link traffic channels. The minimum priority value among the priority values. The first terminal device sends an SL MAC protocol data unit (protocol data unit, PDU) to the second terminal device.

Based on the above solution, the first terminal device can determine the sequence of the IUC information in the SL LCP according to the priority value of the IUC information and the priority values of one or more STCHs, which can more reasonably ensure the transmission of the IUC information and improve the efficiency of the IUC information. transmission performance. In addition, the first terminal device can transmit the IUC information according to the priority of the IUC information without affecting the high-priority MAC CE or logical channel.

For example, the first terminal device determines the sequence of the IUC information in the SL LCP according to the second priority value and the priority value of the IUC information of the first terminal device. Exemplarily, if the priority value of the IUC information is smaller than the second priority value, the sequence of the IUC information in the SL LCP may be before one or more STCHs. a possible reality In the present manner, if the priority value of the IUC information is equal to the second priority value, the sequence of the IUC information in the SL LCP may be before one or more STCHs.

For another example, the first terminal device determines the sequence of the IUC information in the SL LCP according to the first priority value and the priority value of the IUC information of the first terminal device. Exemplarily, if the priority value of the IUC information is greater than or equal to the first priority value, the sequence of the IUC information in the SLLCP may be after one or more STCHs.

For another example, the first terminal device determines the sequence of the IUC information in the SLLCP according to the first priority value, the second priority value, and the priority value of the IUC information of the first terminal device. Exemplarily, if the priority value of the IUC information is less than the first priority value and greater than or equal to the second priority value, then the order of the IUC information in the SLL LCP is after the first sidelink traffic channel, after Before the second sidelink traffic channel. Wherein, the priority value of the first sidelink traffic channel is smaller than the priority value of the IUC information, and the priority value of the second sidelink traffic channel is greater than or equal to the priority value of the IUC information. In a possible implementation, if the priority value of the IUC information is equal to the first priority value and greater than or equal to the second priority value, then the sequence of the IUC information in the SLL LCP is the first side link service channel and before the second sidelink traffic channel.

In a possible implementation manner, the SL MAC PDU includes one or more items of one or more sidelink traffic channels and IUC information. For example, the SL MAC PDU includes one or more of IUC information, SCCH, SL CSI report MAC CE, SL DRX command MAC CE, and STCH.

In a possible implementation, the SL MAC PDU includes IUC information and one or more sidelink traffic channels. Wherein, the IUC information is before one or more sidelink traffic channels, or the IUC information is after one or more sidelink traffic channels, or the IUC information is first among one or more sidelink traffic channels After the sidelink traffic channel and before the second sidelink traffic channel. Wherein, the priority value of the first sidelink traffic channel is smaller than the priority value of the IUC information, and the priority value of the second sidelink traffic channel is greater than or equal to the priority value of the IUC information.

In one example, when the IUC information in the SL LCP precedes one or more STCHs, the IUC information in the SL MAC PDU precedes one or more sidelink traffic channels. In another example, when the sequence of the IUC information in the SL LCP is after one or more STCHs, the IUC information in the SL MAC PDU is after one or more sidelink traffic channels.

In another example, when the sequence of the IUC information of the first terminal device in the SL LCP is after the first side link traffic channel and before the second side link traffic channel, the IUC information in the SL MAC PDU is in the The one or more sidelink traffic channels follow the first sidelink traffic channel and precede the second sidelink traffic channel.

Based on the above scheme, the sequence of IUC information and one or more sidelink service channels in SL MAC PDU can be determined by the sequence of IUC information in SL LCP.

In a second aspect, a data transmission method is provided. The method may be executed by the first terminal device, or executed by a chip similar to the first terminal device. In this method, the first terminal device determines the sequence of the IUC information in the SLL LCP according to the first condition. The first terminal device sends an SL MAC PDU to the second terminal device. Wherein, when the first condition is met, the sequence of the IUC information of the first terminal device in the SLL LCP is before one or more sidelink service channels of the first terminal device.

Based on the foregoing solution, the first terminal device may determine the sequence of the IUC information in the SLL LCP according to the first condition. Therefore, the first terminal device can transmit the IUC information according to the priority of the IUC information without affecting the high-priority MAC CE or logical channel.

Wherein, the first condition may include one or more of conditions 1 to 4.

Condition 1: the minimum priority value among the priority values of one or more STCHs is greater than or equal to the first threshold.

Condition 2: the minimum priority value among the priority values of the M groups of resource indication information contained in the IUC information is smaller than the fifth threshold. M is an integer greater than or equal to 1.

Condition 3: The MAC layer of the first terminal device will receive information indicating that the priority of the IUC information is higher from the PHY layer of the first terminal device.

Condition 4: The IUC information was determined to be of lower priority when the IUC information was transmitted last time.

When the IUC information is IUC indication information, the first condition may further include any one of the following conditions 5 and 6.

Condition 5: the priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold.

Condition 6: IUC information is triggered based on IUC request information.

In a third aspect, a data transmission method is provided. The method may be executed by the first terminal device, or by a chip similar to the function of the first terminal device. In this method, when the second condition is met, the IUC information of the first terminal device is in a shortened format.

Based on the above solution, the first terminal device can transmit IUC information in a shortened format. For example, when the size of SL resources is not enough to transmit IUC information, the first terminal device can transmit IUC information in a shortened format to improve communication between terminal devices. communication performance.

The second condition may include one or more of the following conditions a' to condition d'.

Condition a': the minimum priority value among the priority values of one or more STCHs is smaller than the third threshold.

Condition b': the minimum priority value among the priority values of the M groups of resource indication information included in the IUC information is greater than or equal to the sixth threshold.

Condition c': the MAC layer of the first terminal device will receive information indicating that the priority of the IUC information is lower from the PHY layer of the first terminal device.

Condition d': The IUC information was determined to have a higher priority when the IUC information was transmitted last time.

When the IUC information is IUC indication information, the above second condition may also include any one of the following conditions and condition 5.

Condition e': the priority value included in the IUC request information corresponding to the IUC information is greater than or equal to the fourth threshold.

Condition f': IUC information is triggered based on conditions.

In a possible implementation manner of the first aspect to the third aspect, one or more sidelink traffic channels are sent to the second terminal device. Alternatively, the one or more sidelink traffic channels are traffic channels between the first terminal device and the second terminal device.

In a possible implementation manner of the first aspect to the third aspect, each of the one or more sidelink traffic channels has data to be transmitted.

In a possible implementation manner of the first aspect to the third aspect, the attribute corresponding to each of the one or more sidelink traffic channels matches the attribute of the resource corresponding to the MAC PDU.

In a possible implementation manner of the first aspect to the third aspect, the first terminal device sends the first indication information to the second terminal device. The first indication information is used to indicate that the sequence of the IUC information in the SLLCP is after one or more side link traffic channels.

Based on the above scheme, when the priority of the IUC information is lower than the priority of one or more sidelink traffic channels, the first terminal device may send the first indication information to the second terminal device to indicate the priority of the IUC information smaller.

In a possible implementation manner of the first aspect to the third aspect, the format corresponding to the IUC information is a shortened format.

In a possible implementation manner of the first aspect to the third aspect, the first terminal device determines that the format corresponding to the IUC information is the shortened format. For example, when the first terminal device determines that the SL resource is insufficient to transmit the IUC information, it determines that the format corresponding to the IUC information is a shortened format. For another example, when the first terminal device determines that the sequence of the IUC information in the SL LCP is before one or more sidelink traffic channels, it determines that the format corresponding to the IUC information is a shortened format.

In a possible implementation manner of the first aspect to the third aspect, the IUC information corresponding to the shortened format includes N resources. N is greater than or equal to 1. The N resources are the first N resources sorted from front to back according to the selection time among the multiple resources selected by the first terminal device. Alternatively, the N resources are the first N resources sorted in descending order of signal quality among the multiple resources selected by the first terminal device. Alternatively, the N resources are the first N resources sorted in ascending order of interference among the multiple resources selected by the first terminal device.

Based on the foregoing solution, the first terminal device may determine the N resources included in the shortened IUC information.

In a possible implementation manner of the first aspect to the third aspect, the N resources are determined by the MAC layer of the first terminal device, or, the N resources are determined by the physical layer of the first terminal device.

In a possible implementation manner of the first aspect to the third aspect, when the N resources are determined by the physical layer of the first terminal device, the MAC layer sends the second indication information of the value of N to the physical layer.

In a possible implementation manner of the first aspect to the third aspect, the second indication information explicitly indicates the value of N. For example, the second indication information may include the value of N. Alternatively, the second indication information implicitly indicates the value of N. For example, a table of values of N may be predefined, and each value of N in the table has an index. The second indication information may indicate an index, so as to achieve the purpose of implicitly indicating the value of N.

In a possible implementation manner of the first aspect to the third aspect, the value of N is predefined, or the value of N is determined according to SL resources.

In a possible implementation manner of the first aspect to the third aspect, the first terminal device determines that the resource corresponding to the SL MAC PDU is the resource contained in the resource pool corresponding to the IUC request information corresponding to the IUC information. Or, the first terminal device determines that the resource corresponding to the SL MAC PDU is a resource included in the resource pool corresponding to the IUC information.

Based on the above solution, the first terminal device can determine whether the resource for transmitting the IUC information is accurate, so the second terminal device can determine the set of resources indicated by the IUC information according to the resource for transmitting the IUC information.

In a possible implementation of the first aspect to the third aspect, when only IUC information is included in the SL MAC PDU, and the IUC information is not configured with a priority, the first terminal device determines that the priority of the IUC information is the default priority class. The first terminal device indicates the default priority value to the second terminal device.

Based on the above scheme, when the priority value of the IUC information cannot be determined, the default priority value can be used as the priority value of the IUC information, and the order of the IUC information in the SLL LCP can be determined.

In a possible implementation manner of the first aspect to the third aspect, the first terminal device receives the IUC request information from the second terminal device. Optionally, the IUC request information is used to request a resource set, or the IUC request information is used to request IUC indication information. The IUC indication information is used to indicate a resource set, and the resource set includes one or more resources.

In a fourth aspect, a data transmission method is provided. The method may be executed by the second terminal device, or by a chip having a function similar to that of the second terminal device. In this method, the second terminal device receives the SL media access control protocol data unit MAC PDU from the first terminal device, and the SL MAC PDU includes the IUC information of the first terminal device and one or more sidelinks of the first terminal device One or more of the road traffic channels. Each item contained in the SL MAC PDU is Determined according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device. The first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the second priority value is the priority value of one or more side link traffic channels. The minimum priority value among the priority values.

In a fifth aspect, a data transmission method is provided. The method may be executed by the second terminal device, or by a chip having a function similar to that of the second terminal device. In this method, the second terminal device receives the SL MAC PDU from the first terminal device, and the SL MAC PDU includes the IUC information of the first terminal device and one of the one or more sidelink traffic channels of the first terminal device item or items. Wherein, the IUC information of the first terminal device in the SL MAC PDU is before one or more sidelink traffic channels of the first terminal device. It should be noted that at least one of the IUC information and one or more sidelink traffic channels satisfies one or more of the following first conditions: multiple priorities of one or more sidelink traffic channels Among the priority values, the smallest priority value is greater than or equal to the first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The IUC information is triggered based on the IUC request information of the second terminal device.

For example, the IUC information satisfies at least one of the following: the priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The IUC request information may be sent by the second terminal device to the first terminal device. The IUC information is triggered based on the IUC request information of the second terminal device. Wherein, the receiving time of the IUC request information is before the receiving time of the SL MAC PDU.

Alternatively, the one or more sidelink traffic channels satisfy the following condition: the smallest priority value among multiple priority values of the one or more sidelink traffic channels is greater than or equal to the first threshold.

In a possible implementation manner of the fourth aspect and the fifth aspect, one or more sidelink traffic channels are sent to the second terminal device.

In a possible implementation manner of the fourth aspect and the fifth aspect, each of the one or more sidelink traffic channels has data to be transmitted.

In a possible implementation manner of the fourth aspect and the fifth aspect, the resources corresponding to each of the one or more sidelink traffic channels match the resources corresponding to the MAC PDU.

In a possible implementation manner of the fourth aspect and the fifth aspect, the second terminal device receives the first indication information from the second terminal device. The first indication information is used to indicate that the sequence of the IUC information in the SLLCP is after one or more side link traffic channels.

In a possible implementation manner of the fourth aspect and the fifth aspect, the format corresponding to the IUC information is a shortened format.

In a possible implementation manner of the fourth aspect and the fifth aspect, the resource corresponding to the SL MAC PDU is the resource contained in the resource pool corresponding to the IUC request information corresponding to the IUC information. Alternatively, the resource corresponding to the SL MAC PDU is the resource contained in the resource pool corresponding to the IUC information.

In a possible implementation of the fourth aspect and the fifth aspect, when the SL MAC PDU only contains IUC information, and the IUC information is not configured with a priority, the priority of the IUC information is the default priority. The second terminal device receives the information of the default priority value from the first terminal device.

In a possible implementation manner of the fourth aspect and the fifth aspect, the second terminal device sends to the first terminal device IUC requests information.

In a sixth aspect, a communication device is provided, including a processing unit and a transceiver unit.

The processing unit is configured to determine the sequence of the IUC information in the SL LCP according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device. The first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the second priority value is the priority value of one or more side link traffic channels. The minimum priority value among the priority values. The transceiver unit is configured to send the SL MAC PDU to the second terminal device.

In a possible implementation manner, the SL MAC PDU includes one or more items of one or more sidelink traffic channels and IUC information.

In a possible implementation, the SL MAC PDU includes IUC information and one or more sidelink traffic channels. Wherein, the IUC information is before one or more sidelink traffic channels, or the IUC information is after one or more sidelink traffic channels, or the IUC information is first among one or more sidelink traffic channels After the sidelink traffic channel and before the second sidelink traffic channel. Wherein, the priority value of the first sidelink traffic channel is smaller than the IUC information, and the priority value of the second sidelink traffic channel is greater than or equal to the IUC information.

In a seventh aspect, a communication device is provided, including a processing unit and a transceiver unit.

The processing unit is configured to determine the sequence of the IUC information in the SL LCP according to the first condition. The transceiver unit is configured to send the SL media access control protocol data unit MAC PDU to the second terminal device. Wherein, when the first condition is met, the sequence of the IUC information of the first terminal device in the SLL LCP is before one or more sidelink service channels of the first terminal device. The first condition includes one or more of the following: the smallest priority value among the plurality of priority values of the one or more sidelink traffic channels is greater than or equal to a first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The first terminal device receives IUC request information corresponding to the IUC information.

In an eighth aspect, a communication device is provided, including a processing unit and a transceiver unit. A processing unit, configured to determine that the second condition is met. Wherein, when the second condition is met, the IUC information of the first terminal device is in a shortened format, and the second condition includes one or more of the following: one or more sidelink traffic channels of the first terminal device A minimum priority value among the plurality of priority values is less than the third threshold. The priority value included in the IUC request information corresponding to the IUC information is greater than or equal to the fourth threshold. The first terminal device meets the trigger condition of the IUC information. The transceiver unit is configured to send the IUC information in a shortened format.

In a possible implementation manner of the sixth aspect to the eighth aspect, one or more sidelink traffic channels are sent to the second terminal device.

In a possible implementation manner of the sixth aspect to the eighth aspect, each of the one or more sidelink traffic channels has data to be transmitted.

In a possible implementation manner of the sixth aspect to the eighth aspect, the attribute corresponding to each of the one or more sidelink traffic channels matches the attribute of the resource corresponding to the MAC PDU.

In a possible implementation manner of the sixth aspect to the eighth aspect, the transceiver unit is further configured to send the first indication information to the second terminal device. The first indication information is used to indicate that the sequence of the IUC information in the SLLCP is after one or more side link traffic channels.

In a possible implementation manner of the sixth aspect to the eighth aspect, the format corresponding to the IUC information is a shortened format.

In a possible implementation manner of the sixth aspect to the eighth aspect, the processing unit is further configured to determine the format corresponding to the IUC information according to one or more of the SL resources and the sequence of the IUC information in the SL LCP is a shortened case Mode. For example, when the first terminal device determines that the SL resource is insufficient to transmit the IUC information, it determines that the format corresponding to the IUC information is a shortened format. For another example, when the first terminal device determines that the sequence of the IUC information in the SL LCP is before one or more sidelink traffic channels, it determines that the format corresponding to the IUC information is a shortened format.

In a possible implementation manner of the sixth aspect to the eighth aspect, the IUC information corresponding to the shortened format includes N resources. N is greater than or equal to 1. The N resources are the first N resources sorted from front to back according to the selection time among the multiple resources selected by the first terminal device. Alternatively, the N resources are the first N resources sorted in descending order of signal quality among the multiple resources selected by the first terminal device. Alternatively, the N resources are the first N resources sorted in ascending order of interference among the multiple resources selected by the first terminal device.

In a possible implementation manner of the sixth aspect to the eighth aspect, the N resources are determined by the MAC layer of the first terminal device, or, the N resources are determined by the physical layer of the first terminal device.

In a possible implementation manner of the sixth aspect to the eighth aspect, when the N resources are determined by the physical layer of the first terminal device, the MAC layer sends the second indication information of the value of N to the physical layer.

In a possible implementation manner of the sixth aspect to the eighth aspect, the second indication information explicitly indicates the value of N. Alternatively, the second indication information implicitly indicates the value of N.

In a possible implementation manner of the sixth aspect to the eighth aspect, the value of N is predefined, or the value of N is determined according to SL resources.

In a possible implementation manner of the sixth aspect to the eighth aspect, the processing unit is further configured to determine that the resource corresponding to the SL MAC PDU is a resource included in the resource pool corresponding to the IUC request information corresponding to the IUC information. Or, the processing unit is further configured to determine that the resource corresponding to the SL MAC PDU is a resource contained in the resource pool corresponding to the IUC information.

In a possible implementation manner of the sixth aspect to the eighth aspect, when the SL MAC PDU only contains IUC information, and the IUC information is not configured with a priority, the priority of the IUC information is the default priority. The first terminal device indicates the default priority value to the second terminal device.

In a possible implementation manner of the sixth aspect to the eighth aspect, the transceiver unit is further configured to receive IUC request information from the second terminal device. Optionally, the IUC request information is used to request a resource set, or the IUC request information is used to request IUC indication information. The IUC indication information is used to indicate a resource set, and the resource set includes one or more resources.

In a ninth aspect, a communication device is provided, including a processing unit and a transceiver unit.

A transceiver unit, configured to receive the SL MAC PDU from the first terminal device. Processing unit for processing SL MAC PDUs. Wherein, the SL MAC PDU includes one or more items of IUC information of the first terminal device and one or more sidelink service channels of the first terminal device. Each item included in the SL MAC PDU is determined according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device. The first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the second priority value is the priority value of one or more side link traffic channels. The minimum priority value among the priority values.

In a possible implementation manner, the SL MAC PDU includes IUC information and one or more sidelink traffic channels. Wherein, the IUC information is before one or more sidelink traffic channels, or the IUC information is after one or more sidelink traffic channels, or the IUC information is first among one or more sidelink traffic channels After the sidelink traffic channel and before the second sidelink traffic channel. Among them, the priority value of the first sidelink traffic channel Less than the IUC information, the priority value of the second sidelink traffic channel is greater than or equal to the IUC information.

In a tenth aspect, a communication device is provided, including a processing unit and a transceiver unit.

A transceiver unit, configured to receive the SL MAC PDU from the first terminal device. Processing unit for processing SL MAC PDUs. Wherein, the SL MAC PDU includes one or more items of IUC information of the first terminal device and one or more sidelink service channels of the first terminal device. Wherein, the IUC information of the first terminal device in the SL MAC PDU is before one or more sidelink traffic channels of the first terminal device. It should be noted that at least one of the IUC information and one or more sidelink traffic channels satisfies one or more of the following first conditions: multiple priorities of one or more sidelink traffic channels Among the priority values, the smallest priority value is greater than or equal to the first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The IUC information is triggered based on the IUC request information of the second terminal device.

In a possible implementation manner of the ninth aspect and the tenth aspect, one or more sidelink traffic channels are sent to the second terminal device.

In a possible implementation manner of the ninth aspect and the tenth aspect, each of the one or more sidelink traffic channels has data to be transmitted.

In a possible implementation manner of the ninth aspect and the tenth aspect, the resources corresponding to each of the one or more sidelink traffic channels match the resources corresponding to the MAC PDU.

In a possible implementation manner of the ninth aspect and the tenth aspect, the transceiving unit is further configured to receive the first indication information from the second terminal device. The first indication information is used to indicate that the sequence of the IUC information in the SLLCP is after one or more side link traffic channels.

In a possible implementation manner of the ninth aspect and the tenth aspect, the format corresponding to the IUC information is a shortened format.

In a possible implementation manner of the ninth aspect and the tenth aspect, the resource corresponding to the SL MAC PDU is the resource contained in the resource pool corresponding to the IUC request information corresponding to the IUC information. Alternatively, the resource corresponding to the SL MAC PDU is the resource contained in the resource pool corresponding to the IUC information.

In a possible implementation of the ninth aspect and the tenth aspect, when only IUC information is included in the SL MAC PDU, and the IUC information is not configured with a priority, the processing unit is also used to determine the priority of the IUC information as Default priority. The second terminal device receives the information of the default priority value from the first terminal device.

In a possible implementation manner of the ninth aspect and the tenth aspect, the transceiver unit is further configured to send the IUC request information to the first terminal device.

In the eleventh aspect, the embodiment of the present application provides a communication device, which may be the communication device in any one of the sixth to tenth aspects of the above embodiments, or the communication device set in the sixth to tenth aspects A chip in any aspect of the communication device. The communication device includes a communication interface, a processor, and optionally, a memory. Wherein, the memory is used to store computer programs or instructions or data, and the processor is coupled with the memory and the communication interface, and when the processor reads the computer programs or instructions or data, the communication device is made to execute the first aspect to the fifth aspect above In any method embodiment of any aspect, the method is executed by the communication device at the sending end or the communication device at the receiving end.

It should be understood that the communication interface can be realized by the antenna, feeder, codec, etc. in the communication device, or if the communication device is a chip set in the communication device at the sending end or the communication device at the receiving end, the communication interface can be The input/output interface of the chip, such as input/output pins, etc. The communication device may also include a transceiver for the communication device to communicate with other devices. Exemplarily, when the communication device is a communication device at the sending end, the other device is a communication device at the receiving end; or, when the communication device is a communication device at the receiving end, the other device It is the communication device at the sending end.

In a twelfth aspect, the present application provides a communication device, including: a logic circuit and an input-output interface.

Exemplarily, the logic circuit is used to determine the sequence of the IUC information in the SLL LCP according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device. The first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the second priority value is the priority value of one or more side link traffic channels. The minimum priority value among the priority values. The input and output interface is used to output SL MAC PDU to the second terminal equipment.

Exemplarily, a logic circuit is configured to determine the sequence of the IUC information in the SLL LCP according to the first condition. The input and output interface is used to output SL MAC PDU to the second terminal equipment. Wherein, when the first condition is met, the sequence of the IUC information of the first terminal device in the SLL LCP is before one or more sidelink service channels of the first terminal device. The first condition includes one or more of the following: the smallest priority value among the plurality of priority values of the one or more sidelink traffic channels is greater than or equal to a first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The first terminal device receives IUC request information corresponding to the IUC information.

Exemplarily, a logic circuit is used to determine that the second condition is met. Wherein, when the second condition is met, the IUC information of the first terminal device is in a shortened format, and the second condition includes one or more of the following: one or more sidelink traffic channels of the first terminal device A minimum priority value among the plurality of priority values is less than the third threshold. The priority value included in the IUC request information corresponding to the IUC information is greater than or equal to the fourth threshold. The first terminal device meets the trigger condition of the IUC information. The input and output unit is used to output the IUC information in a shortened format.

Exemplarily, the input and output unit is configured to output the SL MAC PDU from the first terminal device. Logic circuit for processing SL MAC PDU. Wherein, the SL MAC PDU includes one or more items of IUC information of the first terminal device and one or more sidelink service channels of the first terminal device. Each item included in the SL MAC PDU is determined according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device. The first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the second priority value is the priority value of one or more side link traffic channels. The minimum priority value among the priority values.

Exemplarily, the input and output unit is configured to output the SL MAC PDU from the first terminal device. Logic circuit for processing SL MAC PDU. Wherein, the SL MAC PDU includes one or more items of IUC information of the first terminal device and one or more sidelink service channels of the first terminal device. Wherein, the IUC information of the first terminal device in the SL MAC PDU is before one or more sidelink traffic channels of the first terminal device. It should be noted that at least one of the IUC information and one or more sidelink traffic channels satisfies one or more of the following first conditions: multiple priorities of one or more sidelink traffic channels Among the priority values, the smallest priority value is greater than or equal to the first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The IUC information is triggered based on the IUC request information of the second terminal device.

In a thirteenth aspect, an embodiment of the present application provides a system-on-a-chip, where the system-on-a-chip includes a processor, and may also include a memory, configured to implement the method performed by the communication device in any one of the first to third aspects, Or it is used to implement the method performed by the communication device in any one of the fourth aspect to the fifth aspect. In a possible implementation manner, the chip system further includes a memory, configured to store program instructions and/or data. The system-on-a-chip may consist of chips, or may include chips and other discrete devices.

In the fourteenth aspect, the embodiment of the present application provides a communication system, the communication system includes the communication device described in any one of the sixth to eighth aspects, and includes any one of the ninth aspect and the tenth aspect The communication device described in the aspect.

In a fifteenth aspect, the present application provides a computer-readable storage medium, the computer-readable storage medium stores computer programs or instructions, and when the computer programs or instructions are executed, the communication device at the receiving end in the above aspects realizes (for example, the first terminal device or the second terminal device); or implement the method performed by the communication device (for example, the first terminal device or the second terminal device) at the sending end in the above aspects.

In a sixteenth aspect, a computer program product is provided, and the computer program product includes: computer program codes or instructions, when the computer program codes or instructions are executed, the above aspects performed by the communication device at the receiving end The method is executed, or the method executed by the communication device at the sending end in the above aspects is caused to be executed.

For the beneficial effects of the fourth aspect to the sixteenth aspect and the implementation thereof, reference may be made to the description of the beneficial effects of the method of the first aspect to the third aspect and the implementation thereof.

Description of drawings

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is one of the exemplary flowcharts of a data transmission method provided in an embodiment of the present application;

FIG. 3 is one of exemplary flow charts of a data transmission method provided in an embodiment of the present application;

FIG. 4 is one of the exemplary flowcharts of a data transmission method provided in an embodiment of the present application;

FIG. 5 is one of exemplary flow charts of a data transmission method provided in an embodiment of the present application;

FIG. 6 is one of exemplary flow charts of a data transmission method provided in an embodiment of the present application;

FIG. 7 is one of schematic diagrams of a communication device provided in an embodiment of the present application;

FIG. 8 is one of the schematic diagrams of a communication device provided in an embodiment of the present application;

FIG. 9 is one of schematic diagrams of a communication device provided in an embodiment of the present application;

FIG. 10 is one of schematic diagrams of a communication device provided by an embodiment of the present application.

Detailed ways

The technical terms involved in the embodiments of the present application are introduced below.

1) IUC information, including IUC request information and IUC indication information. Wherein, the IUC request information may be used to request the IUC indication information, and the IUC request information may be an IUC request (request) MAC CE. The IUC indication information may be used to indicate a set of resources (a set of resources), and the IUC indication information may be an IUC MAC CE. Optionally, the IUC request MAC CE can also be called the SL IUC request MAC CE, and the IUC MAC CE can also be called the SL IUC MAC CE.

IUC MAC CE can include M groups of time resource indication value (time resource indication value, TRIV), frequency resource indication value (frequency resource indication value, FRIV) and resource reservation period (resource reservation period).

The IUC request (request) MAC CE may include the following parameters: priority values for physical sidelink control channel (physical sidelink control channel, PSCCH) and physical sidelink shared channel (physical sidelink shared channel, PSSCH) transmission , the number of subchannels used for PSCCH and PSSCH transmission in a slot (slot), and the resource reservation interval.

2) SL LCP, including selection of destination (destination), such as selection of destination L2 identity identifier (identityfier, ID), selection of logical channel (logical channel, LCH), and allocation of SL resources (allocation of sidelink resources). It should be noted that SL LCP is executed every time a new transmission is performed, selecting the destination and selecting the logical channel packet Include two steps:

Step 1: Select a purpose. Among the logical channels or MAC CEs to be transmitted, select the destination corresponding to the logical channel or MAC CE with the highest priority and satisfying specific conditions. Assuming that the specific condition is to have valid SL transmission data, then when selecting the destination, the logical channel or MAC CE with the highest priority and valid SL transmission data can be selected from the logical channels or MAC CEs to be transmitted.

Step 2: Select a logical channel. Select the logical channel or MAC CE corresponding to the purpose selected in step 1, the logical channel or MAC CE with specific conditions.

The current SL LCP order from high to low includes sidelink control channel (sidelink control channel, SCCH), SL channel state information (channel state information, CSI) reporting (reporting) MAC CE, SL discontinuous reception (discontinuous reception, DRX) command (command) MAC CE and sidelink traffic channel (sidelink traffic channel, STCH). It can be understood that the SCCH, SL CSI report MAC CE, SL DRX command MAC CE, and STCH mentioned in the embodiment of the present application belong to the first terminal device. Similarly, the IUC information mentioned in the embodiment of the present application is also of the first terminal device.

In this embodiment of the present application, the SCCH may also be replaced with SCCH data (data from SCCH). In other words, the SCCH may refer to the data carried in the SCCH, and for the convenience of description, the SCCH is used as an example for description in this embodiment of the present application. Similarly, STCH can also be replaced by STCH data (data from any STCH).

It can be understood that the SLL LCP order can be understood as the order in which resources are allocated. For example, the SL LCP sequence from high to low includes SCCH, SL CSI report MAC CE, SL DRX command MAC CE and STCH, then allocate SL resources in the order from high to low of the above SL LCP sequence. It should be noted that if the SL resources are not enough to transmit SCCH, SL CSI report MAC CE, SL DRX command MAC CE and STCH, then according to the size of SL resources, SCCH, SL CSI report MAC CE, SL DRX command MAC CE and STCH One or more allocation resources in STCH. For example, first allocate SL resources for SCCH, if there are remaining SL resources and the remaining SL resources can transmit SL CSI report MAC CE, then allocate SL resources for SL CSI report MAC CE. If there are no remaining resources or the remaining SL resources are not enough to transmit the SL CSI report MAC CE, only allocate SL resources for the SCCH, that is, only transmit the SCCH. After allocating resources for SL CSI report MAC CE, if there are remaining SL resources and the remaining SL resources can transmit SL DRX command MAC CE, then allocate SL resources for SL DRX command MAC CE, and so on.

The SL LCP order can also be understood as the packet order. Wherein, the information contained in the data packet is related to the SL resource. For example, the SCCH is first grouped, and if the SL resource can transmit a data packet containing the SCCH and a data packet containing more information, then report the SL CSI to the MAC CE group. If the SL resource is capable of transmitting a packet containing SCCH, but not a packet containing more information, then only SCCH is included in the packet. Similarly, if the SL resource can transmit data packets containing SCCH and SL CSI report MAC CE, and can also transmit data packets with more information, then the SL DRX command MAC CE is grouped, and so on.

3) The priority value is generally used to indicate the priority. Wherein, the smaller the priority value is, the higher the priority is, or the larger the priority value is, the lower the priority is. In the embodiment of the present application, the smaller the priority value, the higher the priority is taken as an example for illustration.

The technical solutions provided by the embodiments of the present application will be described below with reference to the accompanying drawings.

In a wireless communication system, data communication can be performed between terminal devices through network devices. For example, the network device may act as a relay device, forwarding data from the second terminal device to the first terminal device, or forwarding data from the first terminal device to the second terminal device. Alternatively, the communication between the terminal devices may be directly performed between the terminal devices without using a network device. Communication interface between terminal equipment and terminal equipment It is called a short distance communication 5 (prose communication 5, PC5) interface, and a communication link between terminal devices may be called SL. A typical application scenario of SL communication is vehicle to everything (V2X) technology. Referring to FIG. 1 , it is a schematic diagram of a V2X communication system 100 . a in FIG. 1 shows the architecture within the coverage of the network equipment, and the PC5 connection is established between the terminal equipment, and at the same time, each terminal equipment establishes a connection with the network equipment respectively. It should be understood that each terminal device may be connected to the same network device or may be connected to different network devices, and a in FIG. 1 shows that a terminal device is connected to the same network device as an example. b in Fig. 1 shows the architecture within partial coverage of network equipment, and PC5 connections are established between terminal equipment, while some terminal equipment do not establish connections with network equipment, and the remaining terminal equipment establishes connections with network equipment. c in FIG. 1 shows the out-of-coverage architecture of the network equipment, and a PC5 connection is established between the terminal equipment, and no terminal equipment establishes a connection with the network equipment.

It can be understood that, in FIG. 1 , two terminal devices and one network device are taken as an example for illustration, and the communication system may also include other more terminal devices and network devices.

For the sending end, there are two ways for the terminal device to obtain SL resources, which are called mode 1 and mode 2 respectively. In the case of mode 1, the terminal device obtains SL resources from the network device. Specifically, the network device may schedule SL resources for the terminal device through downlink control information (DCI), or configure an SL configuration authorization (configured grant) for the terminal device through a radio resource control (radio resource control, RRC) message. In mode 2, the terminal device may receive the SL resource pool configuration from the network device, or obtain the SL resource pool configuration from pre-configuration. Then, the terminal device selects an SL resource from the SL resource pool for communication. Specifically, when the terminal device selects the SL resource from the SL resource pool, it may select randomly, or select based on sensing (sensing) or partial sensing.

In the case of mode 1, the terminal equipment is in the RRC connected state. In the case of mode 2, the terminal device can be in the RRC connected state, RRC inactive state, RRC idle state or out of coverage (out of coverage, OOC) state.

In order to improve the performance of mode 2, a resource allocation enhancement scheme for IUC information is currently introduced. The resource allocation enhancement scheme of IUC information generally includes mode 1 and mode 2.

Mode 1: The first terminal device sends preferred resources (preferred resources) or non-preferred resources (not preferred resources) to the second terminal device. For example, the first terminal device may use the SL MAC CE to bear the IUC indication information, and indicate the resource set to the second terminal device.

Wherein, the first terminal device sends the IUC indication information to the second terminal device, which may be triggered when the first terminal device meets a certain condition, or is triggered when the first terminal device receives IUC request information from the second terminal device.

Mode 2: When the first terminal device detects a resource conflict, the first terminal device sends information indicating the resource conflict to the second terminal device through a physical sidelink feedback channel (PSFCH). It can be understood that the resource corresponding to the above PSFCH is different from the resource corresponding to the PSFCH used for hybrid automatic repeat request (hybrid auto repeat request, HARQ) feedback.

If the IUC information cannot be transmitted, it will affect the SL communication performance in mode 2. Therefore, how to improve the transmission performance of IUC information has become an urgent problem to be solved.

In view of this, an embodiment of the present application provides a data transmission method. In this method, the first terminal device can determine the order of the IUC information in the SL LCP, and send the logical channel or MAC CE to the second terminal device according to the LCP order, so that the logical channel or MAC CE of the high priority can be not affected. In the case of SL, transmit IUC information to improve SL communication performance.

Referring to FIG. 2 , it is an exemplary flowchart of a data transmission method provided by an embodiment of the present application, which may include the following operations. It can be understood that the data transmission method provided in the embodiment of the present application is not limited to determining the IUC information in The sequence used in SL LCP can also be applied to other processes that need to determine the priority, such as determining the transmission priority sequence of the uplink (uplink) and the sidelink. In the embodiment of the present application, the SL LCP process is used as the Example to illustrate.

S201: The first terminal device determines the sequence of the IUC information of the first terminal device in the SLL LCP.

For example, the first terminal device may determine the first terminal device's IUC information, SCCH, SL CSI report MAC CE, SL DRX command MAC CE, and SL LCP sequence of the STCH. Optionally, since the SCCH, SL CSI report MAC CE and SL DRX command MAC CE are more important for SL communication, the priority of SCCH, SL CSI report MAC CE and SL DRX command MAC CE is higher, so the first The terminal device can determine the SLL LCP sequence of IUC information and STCH.

Optionally, the first terminal device determines the SL LCP of the IUC information in multiple SLs. For example, the first terminal device may determine the SL LCP of the IUC information in the first SL and the second SL. Wherein, the first SL may be an SL between the first terminal device and the second terminal device, and the second SL may be an SL between the first terminal device and the third terminal device. Wherein, the above one or more STCHs are STCHs between the first terminal device and the second terminal device.

In a possible situation, the IUC information includes IUC indication information. The IUC indication information may be triggered based on a condition. For example, when the condition for triggering the IUC indication information is met, the first terminal device determines the sequence of the IUC indication information in the SLL LCP. Alternatively, the IUC indication information may be triggered based on IUC request information. For example, the first terminal device may receive IUC request information from the second terminal device, where the IUC request information is used to request a resource set, or the IUC request information may be used to request IUC indication information.

In another possible situation, the IUC information includes IUC request information. The IUC request information may be triggered based on conditions. For example, when the first terminal device satisfies the condition for triggering the IUC request information, it determines the sequence of the IUC request information in the SLLCP.

It should be noted that, for descriptions of the IUC request information and the IUC indication information, reference may be made to related introductions in technical terms, and details are not repeated here.

S202: The first terminal device sends SL data to the second terminal device.

Correspondingly, the second terminal device receives the SL data from the first terminal device.

For example, the first terminal device may send an SL MAC PDU or an SL data unit to the second terminal device. The SL data may include one or more items of IUC information and STCH. Optionally, the SL data may include one or more of IUC information, SCCH, SL CSI report MAC CE, SL DRX command MAC CE, and STCH.

It should be noted that S201 and S202 are shown as exemplary steps, and it does not mean that the data transmission method provided in the embodiment of the present application needs to be implemented in two steps. In a possible implementation manner, the first terminal device may send SL data to the second terminal device according to the SL LCP sequence.

In the following, the method for determining the sequence of the IUC information in the SLL LCP by the first terminal device in S201 is introduced, which may include the following method 1 and method 2.

Method 1: In a possible manner, the first terminal device determines the sequence of the IUC information in the SL LCP according to the priority information of the IUC information and the priority information of one or more STCHs of the first terminal device.

The above priority information may be a priority value or the priority information may be a priority. In this embodiment of the present application, the priority information is taken as an example for description.

For example, the first terminal device determines the sequence of the IUC information in the SL LCP according to at least one of the first priority value and the second priority value, and the priority value of the IUC information. Wherein, the first priority value may refer to a maximum priority value among one or more STCH priority values of the first terminal device. The second priority value may refer to the minimum priority value among the priority values of one or more STCHs of the first terminal device.

In an example, the first terminal device may determine the sequence of the IUC information in the SLL LCP according to the second priority value and the priority value of the IUC information. For example, if the priority value of the IUC information is less than the second priority value, it can be considered that the priority of the IUC information is higher than the priority of one or more STCHs of the first terminal device, so the order of the IUC information in the SLL LCP The sequence can be preceded by one or more STCHs. Optionally, when the SL data in S202 includes IUC information and includes one or more STCHs, the IUC information in the SL data precedes the one or more STCHs.

In another example, the first terminal device may determine the sequence of the IUC information in the SL LCP according to the first priority value and the priority value of the IUC information. For example, if the priority value of the IUC information is greater than or equal to the first priority value, it can be considered that the priority of the IUC information is lower than the priority of one or more STCHs of the first terminal device, then the IUC information is in the SL LCP The precedence sequence can be after one or more STCHs. Optionally, when the SL data in S202 includes IUC information and includes one or more STCHs, the IUC information in the SL data follows the one or more STCHs.

It should be noted that, in the embodiment of the present application, a possible implementation manner is given for the case of equal priorities or priority values, but it is easy to understand that there may be other implementation manners for the situation of equal priorities or priority values. For example, if the priority value of the IUC information is greater than the first priority value, then the sequence of the IUC information in the SL LCP can be after one or more STCHs, if the priority value of the IUC information is equal to the second priority value, then The sequence of IUC information in SLLCP can be before one or more STCHs.

In yet another example, the first terminal device may determine the sequence of the IUC information in the SLL LCP according to the first priority value, the second priority value, and the priority value of the IUC information. For example, if the priority value of the IUC information is less than the first priority value and greater than or equal to the second priority value, then it can be considered that the priority of the IUC information is lower than that of the highest priority STCH of the first terminal device , and the priority of the IUC information is higher than the priority of the STCH with the lowest priority of the first terminal device. Then the order of the IUC information in the SLLCP can be between one or more STCHs. For example, the IUC information may follow the first part of the STCH and precede the second part of the STCH. Wherein, the priority of the first part of STCH is higher than the priority of IUC information, that is to say, the maximum priority value in the first part of STCH priority value is smaller than the priority value of IUC information, or it can be understood that the first part of STCH includes priority value It is lower than the STCH corresponding to the priority value of the IUC information. The priority of the second part of STCH is lower than the priority of IUC information, that is to say, the minimum priority value of the priority value of the second part of STCH is greater than or equal to the priority value of IUC information, or it can be understood that the second part of STCH includes The priority value is greater than or equal to the STCH corresponding to the priority value of the IUC information. Optionally, when the SL data in S202 includes IUC information and includes one or more STCHs, the first part of the IUC information in the SL data follows the STCH and precedes the second part of the STCH.

Based on the above solution, the first terminal device may determine the sequence of the IUC information in the SLL LCP according to the priority of the IUC information of the first terminal device and the priorities of one or more STCHs. Therefore, the first terminal device can transmit the IUC information according to the priority of the IUC information without affecting the high-priority MAC CE or logical channel.

Method 2: In yet another possible manner, the first terminal device determines the sequence of the IUC information in the SLL LCP according to the first condition.

For example, the first terminal device may determine whether the priority of the IUC information in the SL LCP is higher or lower according to the first condition. Wherein, the higher priority may be understood as that the priority of the IUC information is higher than that of one or more STCHs of the first terminal device. If the first terminal device determines that the priority of the IUC information is higher according to the first condition, it may be considered that the sequence of the IUC information in the SL LCP is before one or more STCHs. Optionally, the higher priority can also be understood as the priority of the IUC information is higher than that of the first terminal device's SL CSI report MAC CE, SL DRX commands MAC CE and one or more STCHs with high priority. If the first terminal device determines that the priority of the IUC information is higher according to the first condition, it can be considered that the sequence of the IUC information in the SL LCP is before the SL CSI report MAC CE, the SL DRX command MAC CE, and one or more STCHs. Optionally, the higher priority may also be understood as that the priority of the IUC information is higher than that of the SL DRX command MAC CE and one or more STCHs of the first terminal device. If the first terminal device determines that the priority of the IUC information is higher according to the first condition, it can be considered that the sequence of the IUC information in the SL LCP is before the SL DRX command MAC CE and one or more STCHs.

The lower priority may be understood as that the priority of the IUC information is lower than that of one or more STCHs of the first terminal device. If the first terminal device determines that the priority of the IUC information is low according to the first condition, it may be considered that the sequence of the IUC information in the SLLCP is after one or more STCHs. Optionally, the lower priority can also be understood as that the priority of the IUC information is lower than that of the SL DRX command MAC CE and one or more STCHs of the first terminal device. If the first terminal device determines that the priority of the IUC information is lower according to the first condition, it can be considered that the sequence of the IUC information in the SL LCP is after the SL DRX command MAC CE and one or more STCHs.

When the first condition is met, the first terminal device may consider that the priority of the IUC information is high, and when the first condition is not satisfied, the first terminal device may consider that the priority of the IUC information is low.

In the following, the first condition when the IUC information is the IUC request information is first introduced, and the first condition may include one or more of conditions 1-4.

The first threshold may be set according to empirical values, or predefined by the protocol, or negotiated between the first terminal device and the second terminal device, or configured by the network device, or pre-configured, This application does not make specific limitations.

When the minimum priority value among the priority values of one or more STCHs is greater than or equal to the first threshold, it can be considered that the priority of one or more STCHs is lower than or equal to the priority indicated by a certain threshold, as indicated by the first threshold The priority of , that is, the priority of one or more STCHs is relatively low and lower than the priority indicated by the first threshold.

Condition 2: the minimum priority value among the priority values of the M groups of resource indication information contained in the IUC information is smaller than the fifth threshold.

Wherein, each group of resource indication information may include TRIV, FRIV and resource reservation period.

The fifth threshold may be set according to empirical values, or predefined by the protocol, or negotiated between the first terminal device and the second terminal device, or configured by the network device, or pre-configured, This application does not make specific limitations.

When the minimum priority value among the priority values of the M groups of resource indication information contained in the IUC information is less than the fifth threshold, it can be considered that the priority of the M groups of resource indication information is relatively high and higher than the priority indicated by the fifth threshold .

It can be understood that each group of resource indication information may have a given priority value, and the priority value of each group of resource indication information may be indicated by the PHY layer of the first terminal device to the MAC layer of the first terminal device.

For example, the PHY layer of the first terminal device may send priority indication information to the MAC layer of the first terminal device, and the priority indication information is used to indicate that the priority of the IUC information is higher, that is, the sequence of the IUC information in the SLL LCP The order is higher priority.

For example, when the IUC information was transmitted last time, the priority of the IUC information in the SLLCP was lower, or the sequence of the IUC information in the SLLCP was after one or more STCHs. For another example, when the IUC information was transmitted last time, the IUC information was not packaged, that is to say, the IUC information was not transmitted because the priority of the IUC information was low and the SL resources were small during the last transmission of the IUC information.

Wherein, the IUC information may include IUC request information (such as IUC request MAC CE) and IUC indication information (IUC MAC CE).

Condition 5: the priority value included in the IUC request information corresponding to the IUC information (such as IUC indication information) is smaller than the second threshold.

The second threshold may be set based on empirical values, or predefined by the protocol, or negotiated between the first terminal device and the second terminal device, or configured by the network device, or pre-configured. Applications are not specifically limited.

It can be understood that the IUC request information in the embodiment of the present application may include the priority value for PSCCH and PSSCH transmission, so when the priority value for PSCCH and PSSCH transmission is less than the second threshold, it can be considered that the PSCCH and the priority of PSSCH transmission is high and higher than the priority indicated by the second threshold. Therefore, the priority of the corresponding IUC indication information is also high, and is higher than the priority indicated by the second threshold.

Condition 6: IUC information (such as IUC indication information) is triggered based on IUC request information.

For example, the first terminal device receives IUC request information, and the IUC request information is from the second terminal device, and the IUC request information is used to request the IUC information in S201.

Since the IUC information can be triggered based on the IUC request information, in order not to affect the transmission performance between the first terminal device and the second terminal device, it can be considered that the priority of the IUC information in S201 is relatively high.

Optionally, when the first terminal device determines that one or more of the conditions 1-6 are satisfied, the first terminal device may determine that the priority of the IUC information in the SL LCP is higher, that is, it can be understood as The sequence of IUC information in SLLCP is before one or more STCHs. Or, it can be understood that the order of the IUC information in the SL LCP is before the SL CSI report MAC CE, the SL DRX command MAC CE, and one or more STCHs. Or, it can be understood that the order of the IUC information in the SL LCP is before the SL DRX command MAC CE and one or more STCHs.

Optionally, when the SL data in S202 contains IUC information and contains one or more STCHs, the IUC information in the SL data is before one or more STCHs, or the SL CSI reports MAC CE, SL DRX command MAC CE and a or before multiple STCHs, or before the SL DRX command MAC CE and one or more STCHs.

Optionally, the second terminal device may process the IUC information after receiving the IUC information. For example, the second terminal device may determine whether to update or discard previous IUC information. It can be understood that the receiving time of the previous IUC information is before the receiving time of the SL data in S202. The previous IUC information may be sent by the first terminal device to the second terminal device. For example, when the data packet in S202 includes IUC information and the IUC information is not IUC information in a truncated format, the second terminal device may discard the previous IUC information or update the previous IUC information. The second terminal device may process the IUC information included in the data packet in S202.

For another example, when the data packet in S202 contains IUC information and the IUC information is IUC information in a shortened format, the second terminal device may combine, process and store the IUC information contained in the data packet in S202 and the previous IUC information.

In a possible implementation, the IUC information, such as the IUC indication information, is determined as the first When the priority is lower, for example, when the sequence of IUC information in the SL LCP is after one or more STCHs, or when the IUC information is not packaged, or when the IUC information is not allocated SL resources, the first The terminal device may send the first indication information to the second terminal device. The first indication information may indicate the sequence of the IUC information in the SL LCP, or the first indication information may indicate the sequence of the IUC information and one or more STCHs in the SL LCP. For example, the first indication information may be used to indicate that the priority of the IUC information is low. For example, the first indication information may be used to indicate that the priority of the IUC information in the SL LCP is low, or in S202 the IUC information is not Grouped, or the sequence of IUC information in SL LCP is after one or more STCHs, or the first indication information can be used to indicate that the priority value of IUC information is greater than the maximum among the priority values of one or more STCHs priority value.

For example, the first indication information may be used to indicate that the priority of IUC information is lower than that of one or more STCHs, or the first indication information may be used to indicate that the priority of IUC information is lower than that of SL CSI report MAC CE and SL DRX commands The MAC CE, or the first indication information may be used to indicate that the priority of the IUC information is lower than that of the SL CSI report MAC CE.

Optionally, when receiving the first indication information, the second terminal device may send IUC information to the first terminal device. Specifically, when the first indication information indicates the sequence of the IUC indication information in the SL LCP, the second terminal device sends the IUC request information to the first terminal device; when the first indication information indicates that the IUC request information is in the SLL LCP In the order of priority, the second terminal device sends the IUC indication information to the first terminal device. It can be understood that the second terminal device may determine the sequence of the IUC information in the SLL LCP according to the method shown in FIG. 2 .

In a possible situation, the first indication information may be included in the SL data in S202, such as in the SL MAC PDU. In another possible situation, the first indication information may be included in sidelink control information (sidelink control information, SCI) or other information.

Optionally, assuming that the second terminal device sends IUC information to the first terminal device after receiving the first indication information, the first terminal device may determine whether to discard or update the previous IUC information. It can be understood that, the manner in which the first terminal device determines whether to discard or update the previous IUC information may be implemented by referring to whether the second terminal device discards or updates the previous IUC information, which will not be repeated here.

Hereinafter, the above method 1 and method 2 will be explained and illustrated with reference to FIG. 3 . Referring to FIG. 3 , it is an exemplary flow chart of a data transmission method provided in an embodiment of the present application, which may include the following operations.

S301: The first terminal device determines a packetization sequence of the IUC information.

Wherein, S301 may be a possible implementation manner of S201. For example, the first terminal device may determine the sequence of the IUC information in the SLLCP, so as to determine the packetization sequence of the IUC information. The first terminal device may refer to the above method 1 or method 2 to determine the order of grouping the IUC information.

For example, the first terminal device can determine whether the first condition is met, so as to determine the order of the IUC information in the SLLCP, so that the first terminal device can determine the order of grouping the IUC information.

S302: The first terminal device sends an SL MAC PDU to the second terminal device.

Correspondingly, the second terminal device receives the SL MAC PDU from the first terminal device.

Wherein, the SL MAC PDU may be a possible implementation of SL data in S202.

It can be understood that the SL MAC PDU may include one or more items of IUC information and one or more STCHs. It should be noted that, when the SL MAC PDU contains IUC information and one or more STCHs, the order of the IUC information and one or more STCHs in the SL MAC PDU is determined by the grouping sequence determined by the first terminal device in S301 of. For example, when the first terminal device determines in S301 that the grouping order of the IUC information is before one or more STCHs, in S302 the IUC information in the SL MAC PDU is before one or more STCHs.

Optionally, it is assumed that the priority of the IUC information in the SL LCP is lower in S301, or that the IUC information is not packaged in S302, or that the priority of the IUC information in the SL LCP is within one or more STCH After that, FIG. 3 may also include S303.

S303: The first terminal device sends first indication information to the second terminal device.

Correspondingly, the second terminal device receives the first indication information from the first terminal device. The first indication information is used to indicate that the sequence of the IUC information in the SLL LCP is after one or more sidelink traffic channels, or that the IUC information is not packaged in S302, or the sequence of the IUC information in the SLL LCP The sequence follows one or more STCHs.

S304: The second terminal device processes the SL MAC PDU.

For example, the second terminal device may process the SL MAC PDU to obtain the information contained in the SL MAC PDU. Assuming that the SL MAC PDU contains IUC information, the second terminal device can determine whether to discard or update the previous IUC information, which will not be repeated here.

Optionally, when the second terminal device receives the first indication information in S303, FIG. 3 may further include S305-S306.

S305: The second terminal device sends the IUC information to the first terminal device.

Correspondingly, the first terminal device receives the IUC information from the second terminal device.

For example, when the first indication information indicates the order of IUC indication information in SL LCP, the second terminal device sends IUC request information to the first terminal device; when the first indication information indicates the sequence of IUC request information in SLL LCP In the sequence, the second terminal device sends the IUC indication information to the first terminal device. It can be understood that, the method for the second terminal device to determine the sequence of the IUC information in the SLL LCP can be implemented by referring to the aforementioned method 1 or method 2, which will not be repeated here.

S306: The first terminal device processes the IUC information.

The first terminal device may determine whether to discard or update the previous IUC information, which will not be repeated here.

In the above method 1 and method 2, one or more STCHs are the STCHs after selecting the purpose and selecting the STCH in the SLLCP. For example, one or more STCHs may be sent by the first terminal device to the second terminal device. That is to say, the destination corresponding to the one or more STCHs may be the second terminal device. For another example, each of the one or more STCHs has data to be transmitted (SL data is available for transmission). For another example, the resources of each STCH among the above one or more STCHs match the resources corresponding to the SL data in S202. Alternatively, it can be understood that the attribute of each STCH in one or more STCHs matches the attribute of the resource corresponding to the SL data in S202.

Exemplarily, the attribute may include allowing SL configuration grant type 1 (sl-configuredGrantType1Allowed), when each of one or more STCHs allows SL configuration grant type 1, and the resource corresponding to SL data is also allowed SL configuration grant type 1, the resources of each STCH among the above one or more STCHs match the resources corresponding to the SL data.

Exemplary, the attribute may include SL HARQ deactivation (sl-HARQ-feedback disabled), when each STCH in one or more STCHs is SL HARQ deactivation, and the resources corresponding to the SL data are not configured with PSFCH resources, then the above The resources of each STCH among the one or more STCHs match the resources corresponding to the SL data.

In a possible situation, the first terminal device may determine the priority of the IUC information. For example, before S201, the first terminal device may determine the priority of the IUC information.

In an example, if the IUC information is IUC indication information and the IUC information is triggered based on IUC request information If yes, the priority of the IUC information may be determined in the following manner: if the IUC information has a pre-configured or configured priority value, then the priority value of the IUC information is the pre-configured or configured priority value. If there is no pre-configured or configured priority value for the IUC information, the priority value of the IUC information is the priority value contained in the IUC request information.

In another example, if the IUC information is IUC indication information and the IUC information is triggered based on conditions, then the priority of the IUC information may be determined in the following manner: if the IUC information has a pre-configured or configured priority value, then the IUC information The priority value is a pre-configured or configured priority value. If there is no pre-configured or configured priority value for the IUC information, the priority value of the IUC information is determined by the terminal device.

In another example, if the IUC information is IUC request information, then the priority of the IUC information may be determined in the following manner: if the IUC information has a pre-configured or configured priority value, then the IUC information has a pre-configured or configured priority value the priority value of . If there is no pre-configured or configured priority value for the IUC information, the priority value of the IUC information is the same as the priority value of the transport block (TB) transmitted together. For example, assuming that the IUC information and data are transmitted in one message, then when there is no pre-configured or configured priority value for the IUC information, the priority value of the IUC information and the priority value of the data are the same.

However, in some scenarios, the priority of IUC information cannot be determined. For example, when the IUC information is IUC request information, and the IUC information and data are not transmitted in one message, if there is no pre-configured or configured priority value for the IUC information, the priority value of the IUC information cannot be determined.

In view of this, a data transmission method is provided in the implementation of this application. In this method, when the priority of the IUC information cannot be determined, a default (default) priority may be used as the priority of the IUC information.

Referring to FIG. 4 , it is an exemplary flow chart of a data transmission method provided in an embodiment of the present application, which may include the following operations. It can be understood that the embodiment shown in FIG. 4 may be implemented independently, or may be combined with other embodiments, for example, may also be implemented in combination with FIG. 2 , which is not specifically limited in the present application.

S401: The first terminal device determines that a third condition is met.

The third condition may include one or more of the following conditions 1' and 2':

Condition 1': IUC information is not transmitted with data in one message.

For example, in 202 the SL data contains only IUC information.

Condition 2': IUC information does not have a pre-configured or configured priority.

For example, the IUC request information is not configured or is not preconfigured with a priority value.

When the first terminal device determines that at least one of condition 1' and condition 2' is satisfied, the first terminal device may consider that the third condition is satisfied. For example, when the first terminal device determines that the IUC information and data are not transmitted in one message, and the IUC information does not have a pre-configured or configured priority, the first terminal device may determine that the third condition is met.

S402: The first terminal device sends default priority information to the second terminal device.

When the third condition is met, the first terminal device may determine that the priority information of the IUC information is the default priority information. For example, the first terminal device may determine that the priority value of the IUC information is a default priority value (default priority value), and the first terminal device transmits the IUC information by using the default priority value. In other words, in S201, the first terminal device may use the default priority value to determine the order of the IUC information in the SLLCP. It can be understood that the default priority value may also refer to a predefined priority value.

The first terminal device may send the default priority value to the second terminal device, so that the second terminal device adopts the default priority value as the priority value of the IUC information when the priority value of the IUC information cannot be determined.

Based on the above solution, when the priority value of the IUC information cannot be determined, a default priority value may be used as the priority value of the IUC information, and the sequence of the IUC information in the SL LCP is determined.

In a possible situation, for the IUC indication information triggered based on the IUC request information, the first terminal device uses the resource pool corresponding to the IUC request information to determine the resource set indicated in the IUC indication information. Wherein, the resource set indicated by the IUC indication information and the resource pool corresponding to the IUC request information belong to the same resource pool. It can be understood that the resource corresponding to the IUC request information can be understood as the resource pool to which the resource for transmitting the IUC request information belongs, or can be understood as the resource pool to which the resource occupied by the IUC request information belongs.

In another possible situation, for the IUC indication information, the second terminal device uses the resource pool corresponding to the IUC indication information to determine the resource set indicated by the IUC indication information. Wherein, the resource set indicated by the IUC indication information belongs to the resource pool corresponding to the IUC indication information.

Therefore, when the resource pool corresponding to the IUC request information is inaccurate, the resource set indicated by the first terminal device through the IUC indication information is also inaccurate, or when the resource pool corresponding to the IUC indication information is inaccurate, the IUC determined by the second terminal device The set of resources indicated by the indication information is also inaccurate.

In view of this, an embodiment of the present application provides a data transmission method. In this method, the first terminal device may determine whether the resource corresponding to the IUC indication information or the resource corresponding to the IUC request information is accurate, so that the resource set indicated by the IUC indication information is accurate.

Referring to FIG. 5 , it is an exemplary flowchart of a data transmission method provided by an embodiment of the present application, which may include the following operations. It can be understood that the embodiment shown in FIG. 5 may also be combined with other embodiments, for example, implemented in combination with any one or more embodiments in FIG. 2 and FIG. 4 , or the embodiment shown in FIG. 5 may also be Implemented independently, the present application does not make specific limitations.

S501: The first terminal device determines that the resource corresponding to the IUC information matches the SL resource.

Exemplarily, when the SL resource belongs to the resource pool used to transmit the IUC information, it may be determined that the resource corresponding to the IUC information matches the SL resource.

In a possible situation, when the IUC information is IUC request information, the first terminal device may determine that resources used to transmit the IUC request information belong to a resource pool corresponding to the IUC request information. For example, the resources corresponding to the SL data transmission in S202 belong to the resource pool corresponding to the IUC request information, that is to say, the resources corresponding to the SL data transmission in S202 and the resources used to transmit the IUC request information belong to the same resource pool. In another possible situation, when the IUC information is the IUC indication information, the first terminal device determines that the resources used to transmit the IUC indication information belong to the resource pool corresponding to the IUC indication information. For example, the resources corresponding to the transmission of SL data in S202 belong to the resource pool corresponding to the IUC indication information, that is to say, the resources corresponding to the transmission of SL data in S202 and the resource set indicated by the IUC indication information belong to the same resource pool. In this way, the resources corresponding to the IUC information can match the resources for transmitting the IUC information in S202, so the second terminal device can accurately determine the resource set indicated by the IUC indication information.

Optionally, when the resource pool corresponding to the SL resource is a resource pool that provides, generates, or triggers IUC information, it is determined that the SL resource matches the resource corresponding to the IUC information. For example, when the IUC information is IUC request information, the resource pool to which the SL resource belongs is a resource pool for providing or generating or triggering the IUC request information.

It can be understood that the resource pool that provides or generates or triggers the IUC request information refers to the resource pool corresponding to the IUC request information. That is to say, the resource pool corresponding to the SL resource and the resource pool corresponding to the IUC information request information are the same resource pool. Or, assuming that some parameters corresponding to a certain resource pool, such as channel busy ratio (channel busy ratio, CBR), meet certain conditions and trigger the transmission of IUC request information, then this certain resource pool can be called providing or generating or triggering IUC The resource pool for which information is requested.

It can be understood that the resource pool that provides or generates or triggers the IUC information refers to the resource pool corresponding to the IUC information. That is to say, the resource pool corresponding to the SL resource and the resource pool corresponding to the IUC information are the same resource pool. or, suppose a For some parameters corresponding to a resource pool, if the CBR satisfies a certain condition and triggers the transmission of IUC information, the certain resource pool can be called a resource pool that provides, generates, or triggers IUC information.

Exemplarily, S501 may be performed in selecting an LCH or allocating SL resources in the SL LCP. Alternatively, it can be understood that S501 may be implemented before S201.

S502: The first terminal device sends IUC information on the SL resource.

Correspondingly, the second terminal device receives the IUC information.

S502 may be an implementation manner of S202. For example, in S502, the first terminal device sends the SL data in S202 on the SL resource.

Based on the above solution, the first terminal device can determine whether the resource for transmitting the IUC information is accurate before transmitting the IUC information, so the second terminal device can determine the resource set indicated by the IUC information according to the resource for transmitting the IUC information.

In one possible situation, SL resources may not be sufficient to transmit IUC information. For example, in SL LCP, the priority of IUC information may be higher than or equal to one or more STCHs, or the priority of IUC information may be lower than or equal to one or more STCHs, but due to the limitation of the size of SL resources, IUC information cannot be transmitted. For example, if there are no remaining resources to allocate resources for IUC information or package IUC information, or the remaining resources are not enough to allocate resources for IUC information or package IUC information, the IUC information still cannot be transmitted at this time, which will affect the terminal device performance between.

In view of this, an embodiment of the present application provides a data transmission method. In this method, due to the limitation of the size of SL resources, when the IUC information cannot be transmitted, the IUC information can be transmitted in a shortened format, so that the communication performance between terminal devices can be improved.

Referring to FIG. 6 , it is an exemplary flow chart of a data transmission method provided in an embodiment of the present application, which may include the following operations. It can be understood that FIG. 6 can be implemented alone or combined with other embodiments, for example, it can be implemented in combination with any one or more of the embodiments shown in FIGS. 2 to 5 , which is not specifically limited in this application.

Optionally, FIG. 6 may include S601.

S601: The first terminal device determines that a second condition is met.

For example, the first terminal device determines that the format of the IUC information is a shortened format when the second condition is met. Optionally, when the first terminal device determines that the second condition is not met, the format of the IUC information is not a shortened format.

It can be understood that S601 may be implemented after S202. For example, after the first terminal device determines the order of the IUC information in the SL LCP, when the IUC information cannot be transmitted due to the limitation of the size of the SL resource, the first terminal device may execute S601. .

It should be noted that S601 is an optional operation. That is to say, the condition for the first terminal device to send the IUC information in the shortened format is not limited to satisfying the second condition. In other words, the first terminal device may not need to judge whether the second condition is satisfied, that is, the operation of S601 is not performed, and only the operation of S602 is performed.

Wherein, the second condition may include one or more of the following conditions a' to condition d'.

The third threshold may be set according to empirical values, or predefined by the protocol, or negotiated between the first terminal device and the second terminal device, or configured by the network device, or pre-configured, This application does not make specific limitations. Optionally, the third threshold may be the same as the first threshold.

When the minimum priority of one or more STCH priority values is less than the third threshold, it can be considered that the priority of one or more STCHs is higher than the priority indicated by a certain threshold, that is, the priority comparison of one or more STCHs High, and higher than the priority indicated by the first threshold.

Therefore, when the first terminal device determines that the priority of the IUC information is relatively low, such as when the sequence of the IUC information in the SL LCP is after one or more STCHs, in order to improve performance, when the size of the SL resource is not enough to transmit the IUC information , the first terminal device may transmit the IUC information in a shortened format.

For example, the minimum priority value in the M groups of resource indication information contained in the IUC information is greater than or equal to the sixth threshold. The sixth threshold may be set according to empirical values, or predefined by the protocol, or negotiated between the first terminal device and the second terminal device, or configured by the network device, or pre-configured, This application does not make specific limitations. Optionally, the sixth threshold may be the same as the fifth threshold.

When the minimum priority value of the M groups of resource indication information contained in the IUC information is greater than or equal to the sixth threshold, it may be considered that the priority of the M groups of resource indication information is relatively low and lower than the priority indicated by the sixth threshold.

For example, the PHY layer of the first terminal device may send priority indication information to the MAC layer of the first terminal device, and the priority indication information is used to indicate that the priority of the IUC information is low, that is, the sequence of the IUC information in the SLL LCP The order is lower priority.

For example, when the IUC information was transmitted last time, the priority of the IUC information in the SL LCP was higher, or the priority of the IUC information in the SL LCP was before one or more STCHs. For another example, when the IUC information was transmitted last time, the IUC information was packaged.

Condition e': the priority value included in the IUC request information corresponding to the IUC information (such as IUC indication information) is greater than or equal to the fourth threshold.

The fourth threshold may be set according to empirical values, or predefined by the protocol, or negotiated between the first terminal device and the second terminal device, or configured by the network device, or pre-configured, This application does not make specific limitations. Optionally, the fourth threshold may be the same as the second threshold.

It can be understood that the IUC request information in the embodiment of the present application may include priority values for PSCCH and PSSCH transmission, so when the priority values for PSCCH and PSSCH transmission are greater than or equal to the fourth threshold, It can be considered that the priority of PSCCH and PSSCH is low and lower than the priority indicated by the fourth threshold.

Condition f': IUC information (such as IUC indication information) is triggered based on conditions.

For example, the first terminal device may send the IUC indication information when a condition for triggering the IUC indication information is met. Since the IUC information is triggered based on conditions, it can be considered that the priority of the IUC indication information is low.

It can be seen that condition a' to condition f' can be understood as conditions in the opposite case of condition 1 to condition 5. That is to say, when conditions 1 to 5 are met, it can be considered that the priority of IUC information in SLL LCP is higher; The order of precedence is lower priority. Therefore, when the priority of the IUC information in the SLLCP is lower, in order to improve performance, the first terminal device may transmit the IUC information in a shortened format.

In a possible situation, the IUC information in the shortened format may include N resources, or may be understood as including N resource indication information. N is an integer greater than or equal to 1.

In an example, the N resources may be selected according to certain rules from the M resources selected by the first terminal device. M is an integer greater than or equal to 1. For example, the N resources may be the first N resources sorted from front to back according to selection time among the M resources selected by the first terminal device. For example, the first terminal device selects resource 1, resource 2, resource 3, and resource 4 in sequence from front to back in time. However, the IUC information in the shortened format can only contain 3 resources, that is, the value of N is 3, then the IUC information in the shortened format can contain resource 1, resource 2 and resource 3.

For another example, the N resources may be the first N resources with higher signal quality among the M resources selected by the first terminal device. For example, the first terminal device may sort the M resources in descending order of RSRP values, and select the first N resources. Or, the first terminal device may sort according to the descending order of RSRQ values, and select the first N resources. Alternatively, the first terminal device may sort according to received signal strength indication (received signal strength indication, RSSI) values from large to small, and select the first N resources.

For another example, the N resources may be the first N resources with less interference among the M resources selected by the first terminal device. For example, the first terminal device may sort the interference of the M resources in ascending order, and select the first N resources. Exemplarily, the interference may be SL CBR or SL signal to interference plus noise ratio (signal to interference plus noise ratio, SINR). The larger the SL CBR value, the greater the interference, and the larger the SL SINR value, the smaller the interference.

It should be noted that the above N resources may be selected by the PHY layer of the first terminal device, or may be selected by the MAC layer of the first terminal device. In a possible situation, the PHY layer of the first terminal device may send the selected M resources to the MAC layer of the first terminal device. Then the MAC layer of the first terminal device can select N resources from the M resources according to the above certain rules. In another possible situation, the MAC layer of the first terminal device may send the value of N to the PHY layer of the first terminal device. For example, the MAC layer of the first terminal device may send the second indication information to the PHY layer of the first terminal device. In a possible situation, the second indication information may explicitly indicate the value of N. For example, the second indication information may include the value of N. Optionally, the value of N may be predefined by the protocol, or configured by the network, or pre-configured, or negotiated between the first terminal device and the second terminal device, or the value of N may also be based on the SL Resources are determined. For example, the larger the SL resource, the larger the value of N may be, and the smaller the SL resource, the smaller the value of N.

In another possible situation, the second indication information may implicitly indicate the value of N. For example, the second indication information may indicate an index in a table, the table contains one or more values of N, and each value of N has an index. It can be understood that the table including one or more values of N may be predetermined by the protocol, or may be pre-configured, which is not specifically limited in this application.

After the PHY layer of the first terminal device determines the value of N, when selecting resources, the PHY layer of the first terminal device may select only N resources and send the N resources to the MAC layer of the first terminal device.

S602: The first terminal device sends IUC information to the second terminal device.

Correspondingly, the second terminal device receives the IUC information from the first terminal device.

For example, the first terminal device may send SL data to the second terminal device, and the SL data may include IUC information in a shortened format.

Optionally, when the IUC information received by the second terminal device is IUC information in a shortened format, FIG. 6 may further include the following S603.

S603: The second terminal device sends IUC request information to the first terminal device.

Correspondingly, the first terminal device receives the IUC request information from the second terminal device.

It can be understood that the second terminal device can determine the sequence of the IUC request information in the SLL LCP, for example, the second terminal device can determine the sequence of the IUC request information in the SLL LCP through the embodiment shown in FIG. In S603, the IUC request information is sent to the first terminal device.

Optionally, FIG. 6 may further include the following S604.

S604: The first terminal device processes the IUC request information.

For example, the first terminal device may determine whether to discard or update the previous IUC request information. S604 may be implemented by referring to the aforementioned first terminal device determining whether to update or discard the previous IUC information, which will not be repeated here.

Exemplarily, when the IUC request information received by the first terminal device is not in a shortened format, the first terminal device may discard or update the previous IUC request information. The previous IUC request information may refer to the previous IUC information. For example, the previous IUC request information may be sent by the second terminal device to the first terminal device, and the reception time of the previous IUC request information is before the reception time of the IUC request information in S603.

The following describes the communication device used to implement the above method in the embodiment of the present application with reference to the accompanying drawings. Therefore, all the content above can be used in subsequent embodiments, and repeated content will not be repeated.

FIG. 7 is a schematic block diagram of a communication device 700 provided by an embodiment of the present application. The communication apparatus 700 may correspondingly implement the functions or steps implemented by the first terminal device or the second terminal device in the foregoing method embodiments. The communication device may include a processing unit 710 and a transceiver unit 720 . Optionally, a storage unit may also be included, and the storage unit may be used to store instructions (code or program) and/or data. The processing unit 710 and the transceiver unit 720 may be coupled with the storage unit, for example, the processing unit 710 may read instructions (code or program) and/or data in the storage unit to implement corresponding methods. Each of the above units can be set independently, or can be partially or fully integrated.

In some possible implementation manners, the communication apparatus 700 can correspondingly implement the behavior and function of the first terminal device in the foregoing method embodiments. For example, the communication apparatus 700 may be a first terminal device, or may be a component (such as a chip or a circuit) applied to the first terminal device. The transceiver unit 720 may be configured to perform all receiving or sending operations performed by the first terminal device in the embodiments shown in FIGS. 2 to 6 . For example, S202 in the embodiment shown in FIG. 2 , and/or other processes used to support the technology described herein; wherein, the processing unit 710 is configured to execute the process performed by the first terminal device in the embodiment shown in FIG. 2 All operations performed except transceiving operations, and/or other processes used to support the techniques described herein. For example, S201 in the embodiment shown in FIG. 2 .

For example, the processing unit 710 is configured to determine the sequence of the IUC information in the SLL LCP according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device. Wherein, the first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal equipment, and the second priority value is the maximum priority value of one or more side link traffic channels The minimum priority value among the priority values of . The transceiver unit 720 is configured to send the SL MAC PDU to the second terminal device.

For another example, the processing unit 710 is configured to determine the sequence of the IUC information in the SLL LCP according to the first condition. The transceiver unit 720 is configured to send an SL media access control protocol data unit MAC PDU to the second terminal device. Wherein, when the first condition is met, the sequence of the IUC information of the first terminal device in the SLL LCP is before one or more sidelink traffic channels of the first terminal device. The first condition includes one or more of the following: the smallest priority value among the plurality of priority values of the one or more sidelink traffic channels is greater than or equal to a first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The first terminal device receives IUC request information corresponding to the IUC information.

For another example, the processing unit 710 is configured to determine that the second condition is satisfied. Wherein, when the second condition is met, the IUC information of the first terminal device is in a shortened format, and the second condition includes one or more of the following: one or more sidelink traffic channels of the first terminal device A minimum priority value among the plurality of priority values is less than the third threshold. The priority value included in the IUC request information corresponding to the IUC information is greater than or equal to the fourth threshold. The first terminal device meets the trigger condition of the IUC information. The transceiver unit 720 is configured to send the IUC information in a shortened format.

In some possible implementation manners, the communication apparatus 700 can correspondingly implement the behavior and function of the second terminal device in the foregoing method embodiments. For example, the communication apparatus 700 may be a second terminal device, or may be a component (such as a chip or a circuit) applied in the second terminal device. The transceiver unit 720 may be configured to perform all receiving or sending operations performed by the second device in the embodiments shown in FIGS. 2 to 6 . For example, S202 in the embodiment shown in FIG. 2, and/or other processes used to support the technology described herein; wherein, the processing unit 710 is configured to execute the second device in the embodiment shown in FIG. All operations except the transceiving operation, such as S304 in the embodiment shown in FIG. 3 , and/or other processes for supporting the technology described herein.

For example, the transceiver unit 720 is configured to receive the SL MAC PDU. The processing unit 710 is configured to process the SL MAC PDU. Each item contained in the SL MAC PDU is determined according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device; the first A priority value is the maximum priority value among the priority values of the one or more sidelink traffic channels of the first terminal equipment, and the second priority value is the maximum priority value of the one or more sidelink traffic channels The minimum priority value among the priority values of traffic channels.

For example, the transceiver unit 720 is configured to receive the SL MAC PDU from the first terminal device. The processing unit 710 is configured to process the SL MAC PDU. Wherein, the SL MAC PDU includes one or more items of IUC information of the first terminal device and one or more sidelink traffic channels of the first terminal device. Wherein, the IUC information of the first terminal device in the SL MAC PDU is before one or more sidelink traffic channels of the first terminal device. It should be noted that at least one of the IUC information and one or more sidelink traffic channels satisfies one or more of the following first conditions: multiple priorities of one or more sidelink traffic channels Among the priority values, the smallest priority value is greater than or equal to the first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The IUC information is triggered based on the IUC request information of the second terminal device.

For operations performed by the processing unit 710 and the transceiver unit 720 , reference may be made to relevant descriptions of the foregoing method embodiments.

It should be understood that the processing unit 710 in this embodiment of the present application may be implemented by a processor or a processor-related circuit component, The transceiver unit 720 may be implemented by a transceiver or transceiver-related circuit components or a communication interface.

Based on the same idea, as shown in FIG. 8 , an embodiment of the present application provides a communication device 800 . The communication device 800 includes a processor 810 . Optionally, the communication device 800 may further include a memory 820 for storing instructions executed by the processor 810 or storing input data required by the processor 810 to execute the instructions or storing data generated after the processor 810 executes the instructions. The processor 810 may implement the methods shown in the foregoing method embodiments through instructions stored in the memory 820 .

Based on the same idea, as shown in FIG. 10 , an embodiment of the present application provides a communication device 900 , where the communication device 900 may be a chip or a chip system. Optionally, in the embodiment of the present application, the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.

The communication device 900 may include at least one processor 910, and the processor 910 is coupled to a memory. Optionally, the memory may be located inside the device or outside the device. For example, the communication device 900 may further include at least one memory 920 . The memory 920 stores necessary computer programs, configuration information, computer programs or instructions and/or data for implementing any of the above embodiments; the processor 910 may execute the computer programs stored in the memory 920 to complete the methods in any of the above embodiments.

The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. Processor 910 may cooperate with memory 920 . In this embodiment of the present application, a specific connection medium among the transceiver 930, the processor 910, and the memory 920 is not limited.

The communication device 900 may further include a transceiver 930, and the communication device 900 may perform information exchange with other devices through the transceiver 930. The transceiver 930 may be a circuit, a bus, a transceiver or any other device that can be used for information exchange, or is called a signal transceiving unit. As shown in FIG. 10 , the transceiver 930 includes a transmitter 931 , a receiver 932 and an antenna 933 . In addition, when the communication device 900 is a chip-like device or circuit, the transceiver in the communication device 900 can also be an input and output circuit and/or a communication interface, which can input data (or say, receive data) and output data ( Or referred to as sending data), the processor is an integrated processor or a microprocessor or an integrated circuit, and the processor can determine the output data according to the input data.

In a possible implementation manner, the communication device 900 may be applied to a first terminal device, and the specific communication device 900 may be a first terminal device, or may be able to support the first terminal device, and implement any of the above-mentioned embodiments means for the functionality of the first terminal device. The memory 920 stores necessary computer programs, computer programs or instructions and/or data for realizing the functions of the first terminal device in any of the foregoing embodiments. The processor 910 may execute the computer program stored in the memory 920 to complete the method performed by the first terminal device in any of the foregoing embodiments. Applied to the first terminal equipment, the transmitter 931 in the communication device 900 can be used to transmit SL MAC PDU through the antenna 933.

In another possible implementation manner, the communication device 900 can be applied to a second terminal device, and the specific communication device 900 can be a second terminal device, or it can support the second terminal device, so as to implement any of the above-mentioned implementations. Example of the means for the function of the second terminal device. The memory 920 stores necessary computer programs, computer programs or instructions and/or data for realizing the functions of the second terminal device in any of the above embodiments. The processor 910 may execute the computer program stored in the memory 920 to complete the method performed by the second terminal device in any of the foregoing embodiments. Applied to the second terminal device, the receiver 932 in the communication device 900 can be used to receive SL MAC PDU through the antenna 933.

Because the communication apparatus 900 provided in this embodiment can be applied to a first terminal device to complete the above method performed by the first terminal device, or applied to a second terminal device to complete the method performed by the second terminal device. Therefore, the technical effects that can be obtained can refer to the above-mentioned method embodiments, and will not be repeated here.

In this embodiment of the application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, an Field programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

In the embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD), etc., and may also be a volatile memory (volatile memory), such as Random-access memory (RAM). The memory may also be, 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 the embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing computer programs, computer programs or instructions and/or data.

Based on the above embodiments, referring to FIG. 10, the embodiment of the present application also provides another communication device 1000, including: an input and output interface 1010 and a logic circuit 1020; the input and output interface 1010 is used to receive code instructions and transmit them to the logic circuit 1020; The logic circuit 1020 is configured to run code instructions to execute the method executed by the first terminal device or the second terminal device in any of the foregoing embodiments.

Hereinafter, operations performed by applying the communication apparatus to the first terminal device or the second terminal device will be described in detail.

In an optional implementation manner, the communication device 1000 can be applied to a first terminal device to execute the method performed by the above-mentioned first terminal device, specifically, for example, the first terminal in the embodiments shown in FIGS. 2 to 6 above The method implemented by the device.

For example, the logic circuit 1020 is configured to determine the sequence of the IUC information in the SLL LCP according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device. The first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the second priority value is the priority value of one or more side link traffic channels. The minimum priority value among the priority values. The input and output interface 1010 is used to output the SL MAC PDU to the second terminal device.

For another example, the logic circuit 1020 is configured to determine the sequence of the IUC information in the SLL LCP according to the first condition. The input and output interface 1010 is used to output the SL MAC PDU to the second terminal device. Wherein, when the first condition is met, the sequence of the IUC information of the first terminal device in the SLL LCP is before one or more sidelink service channels of the first terminal device. The first condition includes one or more of the following: the smallest priority value among the plurality of priority values of the one or more sidelink traffic channels is greater than or equal to a first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The first terminal device receives IUC request information corresponding to the IUC information.

For another example, the logic circuit 1020 is configured to determine that the second condition is satisfied. Wherein, when the second condition is met, the IUC information of the first terminal device is in a shortened format, and the second condition includes one or more of the following: one or more sidelink traffic channels of the first terminal device A minimum priority value among the plurality of priority values is less than the third threshold. The priority value included in the IUC request information corresponding to the IUC information is greater than or equal to the fourth threshold. The first terminal device meets the trigger condition of the IUC information. The input and output interface 1010 is used for outputting IUC information in a shortened format.

In another optional implementation manner, the communication device 1000 may be applied to a second terminal device to execute the method performed by the above-mentioned second terminal device, specifically, for example, the first method in the method embodiments shown in FIGS. 2. A method executed by the terminal device.

For example, the input and output interface 1010 is configured to output the SL MAC PDU from the first terminal device. Logic circuit 1020, configured to process SL MAC PDUs. Wherein, the SL MAC PDU includes the IUC information of the first terminal device and One or more of one or more sidelink traffic channels for the first terminal device. Each item included in the SL MAC PDU is determined according to at least one of the first priority value and the second priority value, and the priority value of the IUC information of the first terminal device. The first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the second priority value is the priority value of one or more side link traffic channels. The minimum priority value among the priority values.

For another example, the input and output interface 1010 is configured to output the SL MAC PDU from the first terminal device. Logic circuit 1020, for processing SL MAC PDU. Wherein, the SL MAC PDU includes one or more items of IUC information of the first terminal device and one or more sidelink service channels of the first terminal device. Wherein, the IUC information of the first terminal device in the SL MAC PDU is before one or more sidelink traffic channels of the first terminal device. It should be noted that at least one of the IUC information and one or more sidelink traffic channels satisfies one or more of the following first conditions: multiple priorities of one or more sidelink traffic channels Among the priority values, the smallest priority value is greater than or equal to the first threshold. The priority value included in the IUC request information corresponding to the IUC information is smaller than the second threshold. The IUC information is triggered based on the IUC request information of the second terminal device.

Because the communication apparatus 1000 provided in this embodiment can be applied to a first terminal device to execute the above method executed by the first terminal device, or applied to a second terminal device to complete the method executed by the second terminal device. Therefore, the technical effects that can be obtained can refer to the above-mentioned method embodiments, and will not be repeated here.

Based on the above embodiments, this embodiment of the present application further provides a communication system. The communication system comprises at least one communication device for a first terminal and at least one communication device for a second terminal. For the technical effects that can be obtained, reference can be made to the foregoing method embodiments, and details are not repeated here.

Based on the above embodiments, the embodiments of the present application also provide a computer-readable storage medium, the computer-readable storage medium stores computer programs or instructions, and when the instructions are executed, the terminal device in any of the above-mentioned embodiments executes the method A method implemented or performed by a network device is implemented. The computer-readable storage medium may include: a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and other media capable of storing program codes.

In order to realize the functions of the communication device in FIGS. 7 to 10 above, an embodiment of the present application further provides a chip, including a processor, configured to support the communication device to implement the functions involved in the sending end or the receiving end in the above method embodiments. In a possible design, the chip is connected to a memory or the chip includes a memory for storing necessary computer programs or instructions and data of the communication device.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer programs or instructions. These computer programs or instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that instructions executed by the processor of the computer or other programmable data processing equipment produce Means for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer programs or instructions may also be stored in a computer or other programmable data processing device capable of directing a specific in a computer readable memory working in such a manner that instructions stored in the computer readable memory produce an article of manufacture comprising instruction means implementing a process flow or processes in a flowchart and/or a block or blocks in a block diagram function specified in each box.

These computer programs or instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process for execution on the computer or other programmable device The instructions provide steps for implementing the functions specified in the procedure or procedures of the flowchart and/or the block or blocks of the block diagram.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the scope of the embodiments of the present application. In this way, if the modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A data transmission method, characterized in that, comprising:

The first terminal device determines, according to at least one of the first priority value and the second priority value, and the priority value of the coordinated IUC information between user equipments of the first terminal device, that the IUC information is on the sidelink The order of priority in the LCP of the SL logical channel priority; the first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the first terminal device, and the The second priority value is a minimum priority value among the priority values of the one or more sidelink traffic channels;

The first terminal device sends an SL media access control protocol data unit MAC PDU to the second terminal device.
The method according to claim 1, wherein the SL MAC PDU includes one or more of the one or more sidelink traffic channels and the IUC information.
The method according to claim 1 or 2, wherein the SL MAC PDU includes the IUC information and the one or more sidelink traffic channels; wherein the IUC information is included in the one or more sidelink traffic channels, or the IUC information is after the one or more sidelink traffic channels, or the IUC information is in the one or more sidelink traffic channels After the first sidelink traffic channel, and before the second sidelink traffic channel; wherein, the priority value of the first sidelink traffic channel is less than the priority value of the IUC information, the The priority value of the second sidelink traffic channel is greater than or equal to the priority value of the IUC information.
A data transmission method, characterized in that, comprising:

The first terminal device determines the priority of the sidelink SL logical channel priority of the coordinated IUC information between user equipments of the first terminal device according to the first condition;

The first terminal device sends an SL media access control protocol data unit MAC PDU to the second terminal device;

Wherein, when the first condition is met, the sequence of the IUC information of the first terminal device in the SLL LCP is before one or more sidelink traffic channels of the first terminal device;

The first condition includes one or more of the following:

a minimum priority value of the plurality of priority values for the one or more sidelink traffic channels is greater than or equal to a first threshold;

The priority value included in the IUC request information corresponding to the IUC information is less than a second threshold;

The first terminal device receives IUC request information corresponding to the IUC information.
The method according to any one of claims 1-4, wherein the one or more sidelink traffic channels are sent to the second terminal device.
The method according to any one of claims 1-5, characterized in that each of the one or more sidelink traffic channels has data to be transmitted.
The method according to any one of claims 1 to 6, wherein the attribute corresponding to each sidelink traffic channel in the one or more sidelink traffic channels is the resource corresponding to the SL MAC PDU attributes match.
The method according to any one of claims 1-7, further comprising:

The first terminal device sends first indication information to the second terminal device; the first indication information is used to indicate that the sequence of the IUC information in the SL LCP is in the one or more side lines After the link traffic channel.
The method according to any one of claims 1-8, characterized in that the format corresponding to the IUC information is a shortened format.
The method according to claim 9, wherein in the IUC information corresponding to the shortened format Include N resources; N is greater than or equal to 1;

The N resources are the first N resources sorted from front to back according to the selection time among the multiple resources selected by the first terminal device; or,

The N resources are the first N resources sorted in descending order of signal quality among the multiple resources selected by the first terminal device; or,

The N resources are the first N resources sorted from small to large interference among the multiple resources selected by the first terminal device.
The method according to claim 10, wherein the N resources are determined by the MAC layer of the first terminal device, or the N resources are determined by the physical layer of the first terminal device .
The method according to claim 11, wherein when the N resources are determined by the physical layer of the first terminal device, further comprising:

The MAC layer sends second indication information of the value of N to the physical layer.
The method according to claim 11 or 12, wherein the value of N is predefined, or the value of N is determined according to SL resources.
The method according to any one of claims 1-13, further comprising:

The first terminal device determines that the resource corresponding to the SL MAC PDU is a resource included in the resource pool corresponding to the IUC request information corresponding to the IUC information; or

The first terminal device determines that the resource corresponding to the SL MAC PDU is a resource included in the resource pool corresponding to the IUC information.
The method according to any one of claims 1-14, further comprising:

When only the IUC information is included in the SL MAC PDU, and the IUC information is not configured with a priority, the first terminal device determines that the priority of the IUC information is a default priority;

The first terminal device indicates the default priority value to the second terminal device.
The method according to any one of claims 1-15, wherein the IUC information includes IUC request information and IUC indication information; the IUC request information is used to request a set of resources, and the IUC indication information is used to indicate resources Collection; the resource collection contains one or more resources.
The method according to any one of claims 1-16, further comprising:

The first terminal device receives the IUC request information from the second terminal device.
A communication device, characterized in that it includes: a processing unit and a transceiver unit

The processing unit is configured to determine, according to at least one of the first priority value and the second priority value, and the priority value of the coordinated IUC information between user equipments of the communication device, that the IUC information is in the side row Link SL logical channel priority sequence in LCP; the first priority value is the maximum priority value among the priority values of one or more side link traffic channels of the communication device, and the first The second priority value is the smallest priority value among the priority values of the one or more sidelink traffic channels;

The transceiver unit is configured to send an SL media access control protocol data unit MAC PDU to the second terminal device.
The device according to claim 18, wherein the SL MAC PDU includes one or more items of the one or more sidelink traffic channels and the IUC information.
The device according to claim 18 or 19, wherein the SL MAC PDU includes the IUC information and the one or more sidelink traffic channels; wherein the IUC information is included in the one or multiple sides before the uplink traffic channel, or the IUC information is after the one or more sidelink traffic channels, or the IUC information is the first sidelink among the one or more sidelink traffic channels After the link traffic channel, and before the second side link traffic channel; wherein, the priority value of the first side link traffic channel is less than the priority value of the IUC information, and the second side link traffic channel The priority value of the link traffic channel is greater than or equal to the priority value of the IUC information.
A communication device, characterized in that it includes: a processing unit and a transceiver unit

The processing unit is configured to determine, according to the first condition, the priority of the coordinated IUC information between user equipments of the communication device in the priority of the sidelink SL logical channel;

The transceiver unit is configured to send an SL media access control protocol data unit MAC PDU to the second terminal device;

Wherein, when the first condition is met, the sequence of the IUC information of the communication device in the SLL LCP is before one or more sidelink traffic channels of the communication device;

The first condition includes one or more of the following:

a minimum priority value of the plurality of priority values for the one or more sidelink traffic channels is greater than or equal to a first threshold;

The priority value included in the IUC request information corresponding to the IUC information is less than a second threshold;

The communication device receives IUC request information corresponding to the IUC information.
The apparatus according to any one of claims 18-21, wherein the one or more sidelink traffic channels are sent to the second terminal equipment.
The device according to any one of claims 18-22, wherein each of the one or more sidelink traffic channels has data to be transmitted.
The device according to any one of claims 18 to 23, wherein the attribute corresponding to each sidelink traffic channel in the one or more sidelink traffic channels is the resource corresponding to the SL MAC PDU attributes match.
The device according to any one of claims 18-24, wherein the transceiver unit is also used for:

Sending first indication information to the second terminal device; the first indication information is used to indicate that the sequence of the IUC information in the SLL LCP is after the one or more sidelink traffic channels.
The device according to any one of claims 18-25, wherein the format corresponding to the IUC information is a shortened format.
The device according to claim 26, wherein the IUC information corresponding to the shortened format includes N resources; N is greater than or equal to 1;

The N resources are the first N resources sorted from front to back according to the selection time among the multiple resources selected by the communication device; or,

The N resources are the first N resources sorted in descending order of signal quality among the multiple resources selected by the communication device; or,

The N resources are the first N resources sorted from small to large interference among the multiple resources selected by the communication device.
The device according to claim 27, wherein the N resources are determined by a MAC layer of the communication device, or, the N resources are determined by a physical layer of the communication device.
The device according to claim 28, wherein when the N resources are determined by the physical layer of the communication device, the transceiver unit is further configured to:

Sending second indication information of the value of N to the physical layer.
The device according to claim 28 or 29, wherein the value of N is predefined, or the value of N is determined according to SL resources.
The device according to any one of claims 18-30, wherein the processing unit is further used for:

Determining that the resource corresponding to the SL MAC PDU is a resource included in the resource pool corresponding to the IUC request information corresponding to the IUC information; or

Determining that the resource corresponding to the SL MAC PDU is a resource included in the resource pool corresponding to the IUC information.
The device according to any one of claims 18-31, wherein the processing unit is further configured to:

When only the IUC information is included in the SL MAC PDU, and the IUC information is not configured with a priority, determine that the priority of the IUC information is a default priority;

Indicating the default priority value to the second terminal device.
The device according to any one of claims 18-32, wherein the IUC information includes IUC request information and IUC indication information; the IUC request information is used to request a resource set, and the IUC indication information is used to indicate resource Collection; the resource collection contains one or more resources.
The device according to any one of claims 18-33, wherein the transceiver unit is also used for:

Receive IUC request information from the second terminal device.
A communication device, characterized in that it includes: the device includes a processor and a memory,

said memory for storing computer programs or instructions;

The processor is configured to execute the computer programs or instructions in the memory, so that the device executes the method according to any one of claims 1-3 or 5-17 or makes the device execute the method described in claims 4-17. The method of any one of 17.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are invoked by an electronic device, the electronic device executes the electronic device as claimed in claims 1- 3 or the method according to any one of claims 5-17 or the method according to any one of claims 4-17.
A computer program product, characterized in that it includes computer-executable instructions, and when the computer-executable instructions are run on a computer, the computer is made to execute the method according to any one of claims 1-3 or 5-17 Or the method according to any one of claims 4-17.
A communication system, characterized by comprising a communication device for performing the method according to any one of claims 1-3 or 5-17 or 4-17, and comprising a second terminal device.
A system on a chip, characterized in that it includes a communication interface and a processor:

The communication interface is used to input and/or output signaling or data;

The processor is configured to execute a computer-executable program, so that the device installed with the system-on-a-chip executes the method according to any one of claims 1-17.