Selective retransmission of groupcast data
Apparatuses, methods, and systems are disclosed for determining a feedback resource associated with groupcast data. One method includes receiving a configuration associated with a resource pool for PSFCH. The method includes receiving groupcast data via sidelink and determining HARQ feedback based at least in part on the received groupcast data. The method includes determining a PSFCH resource for the HARQ feedback based at least in part on the resource pool for the PSFCH and transmitting the HARQ feedback using the determined PSFCH resource.
1. A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the UE to:
receive a configuration associated with a resource pool for physical sidelink feedback channel (PSFCH);
receive groupcast data via sidelink;
determine hybrid automatic repeat request (HARQ) feedback based at least in part on the received groupcast data;
determine a PSFCH resource for the HARQ feedback in response to the reception of the groupcast data and based on a member identifier associated with the UE, wherein the PSFCH resource is associated with the resource pool for the PSFCH; and
transmit the HARQ feedback using the determined PSFCH resource.
2. The UE of claim 1 , wherein to receive the groupcast data, the at least one processor is configured to cause the UE to receive a physical sidelink control channel (PSCCH) transmission comprising sidelink control information (SCI), and wherein the SCI indicates a groupcast transmission.
3. The UE of claim 2 , wherein the SCI indicates a set of values for the HARQ feedback, wherein the set of values includes a first value indicating a positive acknowledgement (ACK) and a second value indicating a negative acknowledgement (NACK).
4. The UE of claim 2 , wherein the SCI indicates a data transmission index and a transmission occasion.
5. The UE of claim 1 , wherein to determine the PSFCH resource, the at least one processor is configured to cause the UE to select the PSFCH resource from a subset of the resource pool.
6. The UE of claim 5 , wherein the subset of the resource pool is based on a Quality of Service (QOS) priority of the groupcast data.
7. The UE of claim 6 , wherein to receive the groupcast data, the at least one processor is configured to cause the UE to receive a physical sidelink control channel (PSCCH) transmission comprising sidelink control information (SCI), and wherein the SCI indicates the QoS priority of the groupcast data.
8. The UE of claim 5 , wherein the resource pool is configured with a first pool of PSFCH resources, and wherein the subset of the resource pool comprises a second pool of PSFCH resources within the first pool of PSFCH resources.
9. The UE of claim 8 , wherein the second pool of PSFCH resources is determined based on sidelink control information (SCI).
10. The UE of claim 8 , wherein the second pool of PSFCH resources is indicated by a network entity.
11. The UE of claim 1 , wherein the determined PSFCH resource is within a PSFCH resource set configured within the resource pool, wherein the PSFCH resource set is semi-statically assigned to the UE for the HARQ feedback.
12. A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
receive a configuration associated with a resource pool for physical sidelink feedback channel (PSFCH);
receive groupcast data via sidelink communication;
determine hybrid automatic repeat request (HARQ) feedback based at least in part on the received groupcast data;
determine a PSFCH resource for the HARQ feedback in response to the reception of the groupcast data and based on a member identifier associated with a user equipment (UE), wherein the PSFCH resource is associated with the resource pool for the PSFCH; and
transmit the HARQ feedback using the determined PSFCH resource.
13. The processor of claim 12 , wherein to receive the groupcast data, the at least one controller is configured to cause the processor to receive a physical sidelink control channel (PSCCH) transmission comprising sidelink control information (SCI), and wherein the SCI indicates a groupcast transmission.
14. The processor of claim 13 , wherein the SCI indicates a set of values for the HARQ feedback, wherein the set of values includes a first value indicating a positive acknowledgement (ACK) and a second values indicating a negative acknowledgement (NACK).
15. The processor of claim 13 , wherein the SCI indicates a data transmission index and a transmission occasion.
16. The processor of claim 12 , wherein to determine the PSFCH resource, the at least one controller is configured to cause the processor to select the PSFCH resource from a subset of the resource pool.
17. The processor of claim 16 , wherein the resource pool is configured with a first pool of PSFCH resources, wherein the subset of the resource pool comprises a second pool of PSFCH resources within the first pool of PSFCH resources, and wherein the first pool of PSFCH resources is semi-statically assigned to the processor for the HARQ feedback.
18. The processor of claim 17 , wherein the second pool of PSFCH resources is indicated by a network entity.
19. The processor of claim 12 , wherein the determined PSFCH resource is within a PSFCH resource set configured within the resource pool, wherein the PSFCH resource set is semi-statically assigned to the UE for the HARQ feedback.
20. A method performed by a user equipment (UE), the method comprising:
receiving a configuration associated with a resource pool for physical sidelink feedback channel (PSFCH);
receiving groupcast data via sidelink communication;
determining hybrid automatic repeat request (HARQ) feedback based at least in part on the received groupcast data;
determining a PSFCH resource for the HARQ feedback in response to the reception of the groupcast data and based on a member identifier associated with the UE, wherein the PSFCH resource is associated with based at least in part on the resource pool for the PSFCH; and
transmitting the HARQ feedback using the determined PSFCH resource.