Determining a resource for a channel state information report
Apparatuses, methods, and systems are disclosed for determining a resource for a channel state information report. One method includes receiving, from a transmitter device, a channel state information reference signal within a data region and a channel state information request indicator in sidelink control information. The method includes determining, at a receiver device, a resource for transmitting a channel state information report in response to the channel state information request indicator using a mode 1 resource allocation procedure, a mode 2 resource allocation procedure, or a combination thereof. The method includes transmitting, from the receiver device, the channel state information report via a medium access control control element using the resource.
1. A user equipment (UE), comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the UE to:
generate a plurality of physical sidelink feedback channel (PSFCH) indices associated with a plurality of PSFCH resources based at least partly on an ordered set of physical resource blocks (PRBs) and an ordered set of cyclic shift pairs;
select a PSFCH index of the plurality of PSFCH indices based at least partly on a source identifier (ID) and a member ID in a group communication; and
transmit a PSFCH transmission on a PSFCH resource of the plurality of PSFCH resources associated with the PSFCH index.
2. The UE of claim 1 , wherein a first PRB of the ordered set of PRBs is a lowest PRB in a subchannel.
3. The UE of claim 1 , wherein a first PRB of the ordered set of PRBs has a lowest frequency in a subchannel.
4. The UE of claim 1 , wherein the at least one processor is configured to cause the UE to select a PSFCH resource for the PSFCH transmission based at least partly on a frequency domain or code domain using cyclic shifts on a same frequency resource.
5. The UE of claim 1 , wherein the at least one processor is configured to cause the UE to index a PSFCH resource for the PSFCH transmission in response to a physical sidelink shared channel (PSSCH) transmission.
6. The UE of claim 1 , wherein each cyclic shift of the set of cyclic shift pairs is associated with a sequence.
7. The UE of claim 1 , wherein the plurality of PSFCH indices is based first on the ordered set of PRBs from the configured set of PRBs for PSFCH according to a physical sidelink shared channel (PSSCH).
8. The UE of claim 7 , wherein the plurality of PSFCH indices is based second on the ordered set of cyclic shift pairs from the configured set of cyclic shifts for a PSFCH.
9. The UE of claim 1 , wherein the at least one processor is configured to cause the UE to index a PSFCH resource for the PSFCH transmission in response to a physical sidelink shared channel (PSSCH) transmission first ordered in a frequency domain and second ordered in a code domain based on an availability of the PSFCH resources in the frequency domain.
10. The UE of claim 1 , wherein an availability of a PSFCH resource to transmit hybrid automatic repeat request acknowledgment (HARQ-ACK) information is calculated based on a total number of PSFCH resources and cyclic shifts.
11. A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
generate a plurality of physical sidelink feedback channel (PSFCH) indices associated with a plurality of PSFCH resources based at least partly on an ordered set of physical resource blocks (PRBs) and an ordered set of cyclic shift pairs;
select a PSFCH index of the plurality of PSFCH indices based at least partly on a source identifier (ID) and a member ID in a group communication; and
transmit a PSFCH transmission on a PSFCH resource of the plurality of PSFCH resources associated with the PSFCH index.
12. The processor of claim 11 , wherein a first PRB of the ordered set of PRBs is a lowest PRB in a subchannel.
13. The processor of claim 11 , wherein a first PRB of the ordered set of PRBs has a lowest frequency in a subchannel.
14. The processor of claim 11 , wherein the at least one controller is configured to cause the processor to select a PSFCH resource for the PSFCH transmission based at least partly on a frequency domain or code domain using cyclic shifts on a same frequency resource.
15. The processor of claim 11 , wherein the at least one controller is configured to cause the processor to index a PSFCH resource for the PSFCH transmission in response to a physical sidelink shared channel (PSSCH) transmission.
16. The processor of claim 11 , wherein each cyclic shift of the set of cyclic shift pairs is associated with a sequence.
17. The processor of claim 11 , wherein the plurality of PSFCH indices is based first on the ordered set of PRBs from the configured set of PRBs for PSFCH according to a physical sidelink shared channel (PSSCH).
18. The processor of claim 17 , wherein the plurality of PSFCH indices is based second on the ordered set of cyclic shift pairs from the configured set of cyclic shifts for a PSFCH.
19. The processor of claim 11 , wherein the at least one controller is configured to cause the processor to index a PSFCH resource for the PSFCH transmission in response to a physical sidelink shared channel (PSSCH) transmission first ordered in a frequency domain and second ordered in a code domain based on an availability of the PSFCH resources in the frequency domain.
20. A method performed by a user equipment (UE), the method comprising:
generating a plurality of physical sidelink feedback channel (PSFCH) indices associated with a plurality of PSFCH resources based at least partly on an ordered set of physical resource blocks (PRBs) and an ordered set of cyclic shift pairs;
selecting a PSFCH index of the plurality of PSFCH indices based at least partly on a source identifier (ID) and a member ID in a group communication; and
transmitting a PSFCH transmission on a PSFCH resource of the plurality of PSFCH resources associated with the PSFCH index.