Sidelink communication method and apparatus

Abstract

[Solution] Embodiments of the present disclosure disclose a sidelink communication method and apparatus applicable to a communication system, the method including the step of removing a first resource from an SL grant when a reevaluation or preemption instruction is received for a first resource in an SL grant used for transmitting a sidelink (SL) positioning reference signal (PRS) in an autonomous resource allocation mode. The present invention facilitates the reselection and replacement of removed resources by removing unreliable resources requiring reevaluation and resources preempted by other terminal devices or services from the SL grant, thereby maintaining stable transmission of SL PRS and realizing a reevaluation and preemption method for SL PRS transmission resources.

Claims

1. A side-link communication method performed by a first device, In autonomous resource allocation mode, if a re-evaluation instruction or preemption instruction is received for a first resource in an SL grant used for transmitting a sidelink (SL) positioning reference signal (PRS), the system includes the step of deleting the first resource from the SL grant. A side-link communication method characterized by the following:

2. The steps include determining the second resource from the transmission resource pool, The further step includes adding the second resource to the SL grant, The side link communication method according to feature 1.

3. The steps include: performing a re-evaluation or preemption check on the first resource before the first period preceding the time unit in which the side-link control information (SCI) for instructing the first resource is located, and obtaining the re-evaluation result or preemption check result; The step of obtaining a re-evaluation instruction or preemption instruction based on the re-evaluation result or preemption check result, further includes: The first period is the SL processing time. The side link communication method according to claim 1 or 2, characterized by the above.

4. The SCI includes a first-stage SCI and / or a second-stage SCI. The side link communication method according to feature 3.

5. If a re-evaluation instruction or preemption instruction is received for the first resource in the SL grant used to transmit the sidelink (SL) positioning reference signal (PRS), the step of deleting the first resource from the SL grant is: If a re-evaluation instruction for the first resource is obtained and the first device has not sent an SCI to the second device to instruct the first resource, the procedure includes the step of removing the first resource from the SL grant, The side link communication method according to any one of claims 2 to 4.

6. If a re-evaluation instruction or preemption instruction is received for the first resource in the SL grant used to transmit the sidelink (SL) positioning reference signal (PRS), the step of deleting the first resource from the SL grant is: If a preemption instruction for the first resource is obtained and the first device sends an SCI to the second device to instruct the first resource, the process includes the step of removing the first resource from the SL grant. The side link communication method according to any one of claims 2 to 5.

7. The step of determining a second resource from the aforementioned transmission resource pool is: A step of determining at least one resource from the transmission resource pool, wherein a first resource set consisting of the at least one resource and a fourth resource satisfies a first pre-set condition, and the fourth resource is a resource other than the first resource in the SL grant, The step of randomly selecting the second resource from the at least one resource includes, The side link communication method according to claim 5 or 6, characterized by the features described above.

8. The first pre-set condition is, The number of resources in the first resource set satisfies the frequency domain resource count condition. The number of SL PRS retransmissions corresponding to the first resource set satisfies the retransmission count condition. The transmission of the SL PRS using the first resource set can be completed within the delay requirements. The time interval between two resources in the first resource set satisfies the minimum time interval requirement, and The at least one of the following is that the resources in the first resource set can be instructed by the SCI to be used for retransmission, The side link communication method according to feature 7.

9. If SL discontinuous reception (DRX) is configured on the first device, the second resource is located after the first resource, the second resource is located within the discontinuous reception (DRX) active time of the second device, and the second device is an SL PRS receiving device. The side link communication method according to any one of claims 6 to 8, characterized by the features described above.

10. The step of obtaining the re-evaluation instruction or preemption instruction based on the re-evaluation result or preemption check result is: If the re-evaluation result indicates that the first resource does not belong to the candidate resource set, the step includes obtaining the re-evaluation instruction. The side link communication method according to any one of claims 3 to 9.

11. A step of receiving an SCI transmitted by a third device, wherein the SCI is for indicating a fifth resource, If the fifth resource satisfies a second pre-set condition, the steps include removing the first resource from the candidate resource set, and further including The side link communication method according to any one of claims 3 to 10, characterized by the features described herein.

12. The second pre-set condition is, The SCI is instructed with the resource reservation period and the reception priority of the fifth resource. The fifth resource overlaps with the first resource, and The measurement result of the fifth resource is greater than or equal to the first threshold, including at least one of the following: The side link communication method according to feature 11.

13. The step of obtaining the re-evaluation instruction or preemption instruction based on the re-evaluation result or preemption check result is: The steps include obtaining the preemption instruction if the first resource is excluded from the candidate resource set, the first device has the preemption function enabled, and the reception priority of the fifth resource is higher than the transmission priority of the first resource. The side link communication method according to feature 12.

14. The step of obtaining the re-evaluation instruction or preemption instruction based on the re-evaluation result or preemption check result is: The steps include obtaining a preemption instruction if the first resource is excluded from the candidate resource set, the first device does not have the preemption function enabled, the receive priority of the fifth resource is higher than the transmit priority of the first resource, and the receive priority of the first resource is higher than the priority of the preemption function. The side link communication method according to feature 12.

15. The preemption function of the first device can be used independently with the SL PRS, or the preemption function of the first device can be used jointly with the SL PRS and SL data. The side link communication method according to claim 13 or 14.

16. The steps include sensing resources in the transmission resource pool and obtaining the sensing results, The further step includes determining the candidate resource set based on the sensing results, The side link communication method according to any one of claims 10 to 15, characterized by the features described herein.

17. A side-link communication device, including a processing module, The aforementioned processing module is In autonomous resource allocation mode, if a re-evaluation instruction or preemption instruction is received for a first resource in an SL grant used to transmit a sidelink (SL) positioning reference signal (PRS), the system is configured to delete the first resource from the SL grant. Side-link communication device characterized by

18. It includes a transceiver, a memory, and a processor connected to the transceiver and the memory, respectively. The processor is configured to control the transmission and reception of wireless signals of the transceiver by executing computer-executable instructions in the memory, thereby realizing the side-link communication method described in any one of claims 1 to 16. A communication device characterized by the following features.

19. A computer-readable storage medium in which instructions are stored, When the aforementioned instruction is executed, the side-link communication method described in any one of claims 1 to 16 is realized. A computer-readable storage medium characterized by the following features.

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