Uplink channel transmission for multiple transmit receive points (TRPs)
This disclosure provides systems, methods and apparatuses for uplink channel transmission for multiple transmit receive points (TRPs). In one aspect, a user equipment (UE) resolves overlapping physical uplink control channels (PUCCHs) in a slot or overlapping PUCCH(s) and PUSCH(s) that are mapped to a same TRP in a multi-TRP scenario and that are mapped to two or more different TRPs in the multi-TRP scenario. For example, in a multi-TRP scenario that includes two TRPs, the UE may eliminate overlap of these uplink channels for each of the two TRPs individually and may additionally eliminate overlap of these uplink channels between the two TRPs.
1. A method of wireless communication performed by a user equipment (UE), comprising:
performing a physical uplink control channel (PUCCH) transmission based at least in part on a PUCCH and a physical uplink shared channel (PUSCH) being overlapping uplink channels associated with uplink transmissions to multiple transmit receive points (TRPs), wherein a transmission on the PUSCH is not performed;
transmitting a first non-overlapping uplink transmission associated with a first TRP of the multiple TRPs; and
transmitting a second non-overlapping uplink transmission associated with a second TRP of the multiple TRPs.
2. The method of claim 1 , wherein the transmission on the PUSCH is not performed in accordance with a set of rules related to uplink channels, and
wherein the set of rules is based at least in part on corresponding priorities for payload types.
3. The method of claim 2 , wherein the set of rules is associated with resolving collisions between uplink channels.
4. The method of claim 1 , wherein the PUSCH is associated with a lower priority than the PUCCH.
5. The method of claim 1 , further comprising:
dropping the PUSCH based at least in part on the PUSCH overlapping the PUCCH.
6. The method of claim 1 , further comprising:
multiplexing a hybrid automatic repeat request acknowledgment (HARQ-ACK), channel state information (CSI), and a scheduling request (SR).
7. The method of claim 1 , further comprising:
multiplexing a hybrid automatic repeat request acknowledgment (HARQ-ACK) and a scheduling request (SR).
8. The method of claim 1 , wherein the first non-overlapping uplink transmission and the second non-overlapping uplink transmission are associated with the PUCCH.
9. The method of claim 1 , wherein the first non-overlapping uplink transmission and the second non-overlapping uplink transmission are transmitted after dropping the PUSCH.
10. An apparatus for wireless communication, comprising:
a processing system configured to perform a physical uplink control channel (PUCCH) transmission based at least in part on a PUCCH and a physical uplink shared channel (PUSCH) being overlapping uplink channels associated with uplink transmissions to multiple transmit receive points (TRPs), wherein a transmission on the PUSCH is not performed; and
an interface configured to:
output a first non-overlapping uplink transmission associated with a first TRP of the multiple TRPs; and
output a second non-overlapping uplink transmission associated with a second TRP of the multiple TRPs.
11. The apparatus of claim 10 , wherein the PUSCH transmission on the PUSCH is not performed in accordance with a set of rules related to uplink channels, and
wherein the set of rules is based at least in part on corresponding priorities for payload types.
12. The apparatus of claim 11 , wherein the set of rules is associated with resolving collisions between uplink channels.
13. The apparatus of claim 10 , wherein the PUSCH is associated with a lower priority than the PUCCH.
14. The apparatus of claim 10 , wherein the processing system is further configured to:
drop the PUSCH based at least in part on the PUSCH overlapping the PUCCH.
15. The apparatus of claim 10 , wherein the processing system is further configured to:
multiplex a hybrid automatic repeat request acknowledgment (HARQ-ACK), channel state information (CSI), and a scheduling request (SR).
16. The apparatus of claim 10 , wherein the processing system is further configured to:
multiplex a hybrid automatic repeat request acknowledgment (HARQ-ACK) and a scheduling request (SR).
17. The apparatus of claim 10 , wherein the first non-overlapping uplink transmission and the second non-overlapping uplink transmission are associated with the PUCCH.
18. The apparatus of claim 10 , wherein the interface is configured to output the first non-overlapping uplink transmission and the second non-overlapping uplink transmission after the PUSCH is dropped.
19. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
perform a physical uplink control channel (PUCCH) transmission based at least in part on a PUCCH and a physical uplink shared channel (PUSCH) being overlapping uplink channels associated with uplink transmissions to multiple transmit receive points (TRPs), wherein a transmission on the PUSCH is not performed;
transmit a first non-overlapping uplink transmission, associated with a first TRP of the multiple TRPs; and
transmit a second non-overlapping uplink transmission associated with a second TRP of the multiple TRPs.
20. The non-transitory computer-readable medium of claim 19 , wherein the transmission on the PUSCH is not performed in accordance with a set of rules related to uplink channels, and
wherein the set of rules is based at least in part on corresponding priorities for payload types.
21. The non-transitory computer-readable medium of claim 19 , wherein the PUSCH is associated with a lower priority than the PUCCH.
22. The non-transitory computer-readable medium of claim 19 , wherein the one or more instructions further cause the UE to:
drop the PUSCH based at least in part on the PUSCH overlapping the PUCCH.
23. The non-transitory computer-readable medium of claim 19 , wherein the first non-overlapping uplink transmission and the second non-overlapping uplink transmission are associated with the PUCCH.
24. An apparatus for wireless communication, comprising:
means for performing a physical uplink control channel (PUCCH) transmission based at least in part on a PUCCH and a physical uplink shared channel (PUSCH) being one or more overlapping uplink channels associated with uplink transmissions to multiple transmit receive points (TRPs), wherein a transmission on the PUSCH is not performed;
means for transmitting a first non-overlapping uplink transmission, associated with a first TRP of the multiple TRPs; and
means for transmitting a second non-overlapping uplink transmission associated with a second TRP of the multiple TRPs.
25. The apparatus of claim 24 , wherein the PUSCH is associated with a lower priority than the PUCCH.
26. The apparatus of claim 24 , further comprising:
means for dropping the PUSCH based at least in part on the PUSCH overlapping the PUCCH.
27. The apparatus of claim 24 , further comprising:
means for multiplexing a hybrid automatic repeat request acknowledgment (HARQ-ACK), channel state information (CSI), and a scheduling request (SR).
28. The apparatus of claim 24 , further comprising:
means for multiplexing a hybrid automatic repeat request acknowledgment (HARQ-ACK) and a scheduling request (SR).
29. The apparatus of claim 24 , wherein the first non-overlapping uplink transmission and the second non-overlapping uplink transmission are associated with the PUCCH.
30. The apparatus of claim 24 , wherein the first non-overlapping uplink transmission and the second non-overlapping uplink transmission are transmitted after the PUSCH is dropped.