Method, apparatus, device, and system for determining sidelink feedback channel, and storage medium

1. A method for determining a sidelink feedback channel, applied in a receiving device, the method comprising:

receiving first sidelink data; and

determining, based on a feedback channel format indicator, a target sidelink feedback channel format for transmitting feedback information for the first sidelink data,

the method further comprising:

when second sidelink data needs to be transmitted simultaneously in a slot for transmitting the feedback information for the first sidelink data, determining the target sidelink feedback channel as a first sidelink feedback channel format; and

when no second sidelink data needs to be transmitted in the slot for transmitting the feedback information for the first sidelink data, performing said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data.

2. The method according to claim 1 , wherein said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

obtaining Sidelink Control Information (SCI) carried in a Physical Sidelink Control Channel (PSCCH); and

determining the target sidelink feedback channel format based on first indicator carried in a target information field of the SCI.

3. The method according to claim 1 , wherein said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

determining a format adopted by a Physical Sidelink Control Channel (PSCCH), wherein the format adopted by the PSCCH is represented by at least one of a number of time domain symbols occupied by the PSCCH, a size of a frequency domain resource occupied by the PSCCH, an aggregation level of the PSCCH, and a format of Sidelink Control Information (SCI); and

determining the target sidelink feedback channel format based on the format adopted by the PSCCH and a correspondence between formats of the PSCCH and sidelink feedback channel formats.

4. The method according to claim 1 , wherein said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

obtaining second indication information in received Radio Resource Control (RRC) signaling; and

determining a sidelink feedback channel format indicated by the second indication information as the target sidelink feedback channel format.

5. The method according to claim 4 , wherein the RRC signaling is used to configure a Physical Sidelink Shared Channel (PSSCH) resource pool or a Physical Sidelink Feedback Channel (PSFCH) resource pool.

6. The method according to claim 1 , wherein said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

determining a data attribute of the first sidelink data; and

determining the target sidelink feedback channel format based on the data attribute of the first sidelink data and a correspondence between data attributes and sidelink feedback channel formats.

7. The method according to claim 6 , wherein the data attribute of the first sidelink data comprises a Quality of Service (QOS) attribute of the first sidelink data.

8. A method for determining a sidelink feedback channel, applied in a transmitting device, the method comprising:

determining a target sidelink feedback channel format for transmitting feedback information for first sidelink data; and

transmitting the first sidelink data to a receiving device, and indicating the target sidelink feedback channel format to the receiving device via a feedback channel format indicator,

wherein the receiving device is configured to

when second sidelink data needs to be transmitted simultaneously in a slot for transmitting the feedback information for the first sidelink data, determine a target sidelink feedback channel for transmitting the feedback information for the first sidelink data as a first sidelink feedback channel format; and

when no second sidelink data needs to be transmitted in the slot for transmitting the feedback information for the first sidelink data, determine, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data.

9. The method according to claim 8 , wherein said determining the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

determining a logical channel from which the first sidelink data comes; and

determining the target sidelink feedback channel format based on the logical channel from which the first sidelink data comes and a correspondence between logical channels and sidelink feedback channel formats.

10. The method according to claim 8 , wherein said determining the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

determining a data attribute of the first sidelink data; and

determining the target sidelink feedback channel format based on the data attribute of the first sidelink data and a correspondence between data attributes and sidelink feedback channel formats.

11. The method according to claim 10 , wherein the data attribute of the first sidelink data comprises a Quality of Service (QOS) attribute of the first sidelink data.

12. The method according to claim 8 , wherein said determining the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

obtaining third indication information, wherein the third indication information is configured through Radio Resource Control (RRC) signaling or Downlink Control Information (DCI) signaling; and

determining the target sidelink feedback channel format based on the third indication information.

13. The method according to claim 8 , wherein said determining the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

obtaining fourth indication information, wherein the fourth indication information is configured in resource pool configuration information; and

determining the target sidelink feedback channel format based on the fourth indication information.

14. The method according to claim 9 , wherein the target sidelink feedback channel format is indicated by any one or more of the following modes of:

indicating the target sidelink feedback channel format by first indicator carried in a target information field of Sidelink Control Information (SCI); or

indicating the target sidelink feedback channel format by a Radio Network Temporary Identity (RNTI) used in scrambling or mask processing; or

indicating the target sidelink feedback channel format by a format adopted by a Physical Sidelink Control Channel (PSCCH),

wherein the format adopted by the PSCCH is represented by at least one of a number of time domain symbols occupied by the PSCCH, a size of a frequency domain resource occupied by the PSCCH, an aggregation level of the PSCCH, and a format of the SCI.

15. An apparatus for determining a sidelink feedback channel, applied in a receiving device, the apparatus comprising a processor and a memory, wherein the memory has at least one instruction stored thereon, and the at least one instruction is executed by the processor to implement operations comprising:

receiving first sidelink data; and

determining, based on a feedback channel format indicator, a target sidelink feedback channel format for transmitting feedback information for the first sidelink data,

the operations further comprising:

when second sidelink data needs to be transmitted simultaneously in a slot for transmitting the feedback information for the first sidelink data, determining the target sidelink feedback channel as a first sidelink feedback channel format; and

when no second sidelink data needs to be transmitted in the slot for transmitting the feedback information for the first sidelink data, performing said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data.

16. The apparatus according to claim 15 , wherein said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

obtaining Sidelink Control Information (SCI) carried in a Physical Sidelink Control Channel (PSCCH); and

determining the target sidelink feedback channel format based on first indicator carried in a target information field of the SCI.

17. The apparatus according to claim 15 , wherein said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

determining a format adopted by a Physical Sidelink Control Channel (PSCCH), wherein the format adopted by the PSCCH is represented by at least one of a number of time domain symbols occupied by the PSCCH, a size of a frequency domain resource occupied by the PSCCH, an aggregation level of the PSCCH, and a format of Sidelink Control Information (SCI); and

determining the target sidelink feedback channel format based on the format adopted by the PSCCH and a correspondence between formats of the PSCCH and sidelink feedback channel formats.

18. The apparatus according to claim 15 , wherein said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

obtaining second indication information in received Radio Resource Control (RRC) signaling; and

determining a sidelink feedback channel format indicated by the second indication information as the target sidelink feedback channel format.

19. The apparatus according to claim 15 , wherein said determining, based on the feedback channel format indicator, the target sidelink feedback channel format for transmitting the feedback information for the first sidelink data comprises:

determining a data attribute of the first sidelink data; and

determining the target sidelink feedback channel format based on the data attribute of the first sidelink data and a correspondence between data attributes and sidelink feedback channel formats.