Feedback transmission via a sidelink feedback channel resource of a sidelink resource pool
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, from a second UE, information via a sidelink interface between the first UE and the second UE. The UE may transmit, to the second UE, sidelink hybrid automatic repeat request acknowledgement feedback using a sidelink feedback channel resource of a sidelink resource pool via a sidelink component carrier based at least in part on the information received from the second UE. Numerous other aspects are provided.
1. A method of wireless communication performed by a first user equipment (UE), comprising:
receiving, from a second UE and in a sidelink resource of a sidelink resource pool of a sidelink component carrier of a group of preconfigured sidelink component carriers, information via a sidelink interface between the first UE and the second UE; and
transmitting, to the second UE, sidelink hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback using a sidelink feedback channel resource of the sidelink resource pool via the sidelink component carrier of the group of preconfigured sidelink component carriers based at least in part on the information received from the second UE, wherein the sidelink resource pool is based at least in part on a common sidelink feedback channel configuration associated with the group of preconfigured sidelink component carriers.
2. The method of claim 1 , wherein:
the sidelink HARQ-ACK feedback is managed per sidelink component carrier of the group of preconfigured sidelink component carriers and per sidelink resource pool pools, wherein the group of preconfigured sidelink component carriers comprises a set of sidelink resource pools.
3. The method of claim 1 , wherein:
the sidelink resource pool is configured with the sidelink feedback channel resource to enable a transmission of the sidelink HARQ-ACK feedback.
4. The method of claim 1 , wherein:
the sidelink component carrier is included in Hall the group of preconfigured sidelink component carriers, wherein the group of preconfigured sidelink component carriers are aggregated when sidelink carrier aggregation is configured for the first UE and the second UE.
5. The method of claim 4 , wherein:
the group of preconfigured sidelink component carriers correspond to sidelink component carriers on which the UE is able to perform a simultaneous transmission with aligned channels and are associated with the common sidelink feedback channel configuration.
6. The method of claim 1 , wherein the sidelink component carrier is included in a group of intra-band sidelink component carriers that are aggregated when sidelink carrier aggregation is configured for the first UE and the second UE.
7. The method of claim 6 , wherein the intra-band sidelink component carriers are associated with the common sidelink feedback channel configuration.
8. The method of claim 1 , wherein the sidelink component carrier is a first sidelink component carrier, and wherein a rate matching pattern associated with the first sidelink component carrier is a function of a sidelink feedback channel configuration of a second sidelink component carrier that is aggregated with the first sidelink component carrier.
9. The method of claim 8 , wherein:
the rate matching pattern is defined per sidelink component carrier.
10. The method of claim 8 , wherein:
the sidelink feedback channel configuration includes a periodicity.
11. The method of claim 8 , wherein:
a first slot associated with the first sidelink component carrier is not associated with a sidelink feedback channel resource and a second slot associated with the second sidelink component carrier is associated with a sidelink feedback channel.
12. The method of claim 11 , wherein:
a length of a sidelink control channel or a length of a sidelink shared channel associated with the first sidelink component carrier is shortened to correspond to a length of the sidelink feedback channel of the second slot.
13. The method of claim 8 , wherein:
the rate matching pattern for a first group of UEs that includes the first UE and the second UE does not affect a second group of UEs, wherein the first group of UEs and the second group of UEs are associated with a same set of sidelink component carriers or a same sidelink resource pool.
14. The method of claim 1 , wherein the sidelink component carrier is a first intra-band sidelink component carrier, and wherein a rate matching pattern associated with the first intra-band sidelink component carrier is a function of a sidelink feedback channel configuration of a second intra-band sidelink component carrier that is aggregated with the first intra-band sidelink component carrier.
15. The method of claim 1 , wherein the group of preconfigured sidelink component carriers correspond to a same subcarrier spacing.
16. A first user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the one or more processors configured to cause the UE to:
receive, from a second UE and in a sidelink resource of a sidelink resource pool of a sidelink component carrier of a group of preconfigured sidelink component carriers, information via a sidelink interface between the first UE and the second UE; and
transmit, to the second UE, sidelink hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback using a sidelink feedback channel resource of the sidelink resource pool via the sidelink component carrier of the group of sidelink component carriers based at least in part on the information received from the second UE, wherein the sidelink resource pool is based at least in part on a common sidelink feedback channel configuration associated with the group of preconfigured sidelink component carriers.
17. The UE of claim 16 , wherein:
the sidelink HARQ-ACK feedback is managed per sidelink component carrier of the group of preconfigured sidelink component carriers and per sidelink resource pool, wherein the group of preconfigured sidelink component carriers comprises a set of sidelink resource pools.
18. The UE of claim 16 , wherein:
the sidelink resource pool is configured with the sidelink feedback channel resource to enable a transmission of the sidelink HARQ-ACK feedback.
19. The UE of claim 16 , wherein:
the sidelink component carrier is included in the group of preconfigured sidelink component carriers, wherein the group of preconfigured sidelink component carriers are aggregated when sidelink carrier aggregation is configured for the first UE and the second UE.
20. The UE of claim 19 , wherein:
the group of preconfigured sidelink component carriers correspond to sidelink component carriers on which the UE is able to perform a simultaneous transmission with aligned channels and are associated with the common sidelink feedback channel configuration.
21. The UE of claim 16 , wherein the sidelink component carrier is included in a group of intra-band sidelink component carriers that are aggregated when sidelink carrier aggregation is configured for the first UE and the second UE.
22. The UE of claim 21 , wherein the intra-band sidelink component carriers are associated with the common sidelink feedback channel configuration.
23. The UE of claim 16 , wherein the sidelink component carrier is a first sidelink component carrier, and wherein a rate matching pattern associated with the first sidelink component carrier is a function of a sidelink feedback channel configuration of a second sidelink component carrier that is aggregated with the first sidelink component carrier.
24. The UE of claim 23 , wherein:
the rate matching pattern is defined per sidelink component carrier.
25. The UE of claim 23 , wherein:
the sidelink feedback channel configuration includes a periodicity.
26. The UE of claim 23 , wherein:
a first slot associated with the first sidelink component carrier is not associated with a sidelink feedback channel resource and a second slot associated with the second sidelink component carrier is associated with a sidelink feedback channel.
27. The UE of claim 26 , wherein:
a length of a sidelink control channel or a length of a sidelink shared channel associated with the first sidelink component carrier is shortened to correspond to a length of the sidelink feedback channel of the second slot.
28. The UE of claim 23 , wherein:
the rate matching pattern for a first group of UEs that includes the first UE and the second UE does not affect a second group of UEs, wherein the first group of UEs and the second group of UEs are associated with a same set of sidelink component carriers or a same sidelink resource pool.
29. The UE of claim 16 , wherein the sidelink component carrier is a first intra-band sidelink component carrier, wherein a rate matching pattern associated with the first intra-band sidelink component carrier is a function of a sidelink feedback channel configuration of a second intra-band sidelink component carrier that is aggregated with the first intra-band sidelink component carrier.
30. The UE of claim 16 , wherein the group of preconfigured sidelink component carriers correspond to a same subcarrier spacing.