Uplink collision handling for wireless communications

1. A method for wireless communication at a user equipment (UE), comprising:

identifying that the UE is scheduled to transmit on a first channel associated with a first service type;

identifying that the UE is scheduled to transmit on a second channel associated with a second service type, and that the second channel is scheduled to at least partially overlap with the first channel;

determining that one of the first channel or the second channel is a higher priority channel based at least in part on respective priorities of the first service type and the second service type;

determining that the UE supports simultaneous transmission of partially overlapping channels and that the UE is power-limited; and

transmitting a message on the higher priority channel, based at least in part on the UE being power-limited.

2. The method of claim 1 , further comprising:

determining that the UE is to transmit on only one of the first channel or the second channel based on the second channel being scheduled to at least partially overlap with the first channel and based on a predetermined condition.

3. The method of claim 2 , wherein determining that the UE is to transmit on only one of the first channel or the second channel based on the predetermined condition comprises:

identifying a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap; and

determining that the set of uplink control information multiplexing rules are not satisfied.

4. The method of claim 1 ,

wherein transmitting the message on the higher priority channel comprises transmitting the message using a transmission power that is greater than other transmission powers used for other simultaneous transmissions on channels that partially overlap with the higher priority channel, based at least in part on the UE being power-limited.

5. The method of claim 1 , further comprising:

identifying that the UE is scheduled to transmit on a third channel that at least partially overlaps with both the first channel and the second channel, wherein the third channel is associated with a service type that is not the same as the service type of the higher priority channel.

6. The method of claim 5 , further comprising:

determining that a timeline for each of the first channel, the second channel, and the third channel satisfies a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap; and

determining that the UE is to transmit uplink control information for each of the first channel, the second channel, and the third channel on the higher priority channel.

7. The method of claim 5 , further comprising:

determining that a timeline for some, but not all, of the first channel, the second channel, and the third channel satisfies a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap, with the higher priority channel being one of the channels for which the timeline is determined to satisfy the set of uplink control information multiplexing rules; and

determining that the UE is to transmit uplink control information on the higher priority channel for only the some of the channels that satisfy the set of uplink control information multiplexing rules.

8. The method of claim 5 , further comprising:

determining that a timeline for none of the first channel, the second channel, or the third channel satisfies a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap; and

dropping transmission of all uplink control information associated with channels other than the higher priority channel.

9. The method of claim 5 , further comprising:

dropping all lower priority channels regardless of timelines thereof, wherein the lower priority channels are eMBB channels.

10. The method of claim 1 , further comprising:

identifying that the UE is scheduled to transmit on a third channel that at least partially overlaps with both the first channel and the second channel, wherein the third channel is associated with a service type that is the same as the service type of the higher priority channel.

11. The method of claim 10 , further comprising:

determining that a timeline for each of the first channel, the second channel, and the third channel satisfies a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap; and

determining that the UE is to transmit uplink control information for each of the first channel, the second channel, and the third channel on at least one of the higher priority channel and the third channel.

12. The method of claim 10 , further comprising:

determining that a timeline for some, but not all, of the first channel, the second channel, and the third channel satisfies a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap, with the higher priority channel being one of the channels for which the timeline is determined to satisfy the set of uplink control information multiplexing rules;

re-determining the higher priority channel from the first channel, the second channel, and the third channel based at least in part on respective priorities of the first service type and the second service type and a tie-breaking priority rule; and

determining that the UE is to transmit uplink control information on the higher priority channel for only some of the channels that satisfy the set of uplink control information multiplexing rules.

13. The method of claim 12 , wherein the tie-breaking priority rule is based at least in part on a modulation and coding scheme or channel quality indicator used by each channel, timing parameters pertaining to timing durations between scheduled uplink channels and downlink channels associated with and preceding the scheduled uplink channels, associated search spaces, control resource sets, or bandwidth part indices, component carrier indices, associated radio network temporary identifiers, uplink control information content on the channels, or combinations thereof.

14. The method of claim 10 , further comprising:

determining that a timeline for none of the first channel, the second channel, or the third channel satisfies a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap; and

dropping transmission of all uplink control information associated with channels other than the higher priority channel.

15. The method of claim 1 , wherein:

determining that one of the first channel or the second channel is the higher priority channel is based at least in part on an indication field in downlink control information, a search space or control resource set, a bandwidth part, a radio network temporary identifier masking, physical downlink control channel scrambling, or combinations thereof.

16. The method of claim 1 , wherein:

determining that one of the first channel or the second channel is the higher priority channel is based at least in part on a block error rate associated with a channel state information process to be reported, association with downlink control information detected via a priority-based radio network temporary identifier, use of a priority-based channel quality indicator table, timing parameters pertaining to timing durations between scheduled uplink channels and downlink channels associated with and preceding the scheduled uplink channels, or combinations thereof.

17. The method of claim 1 , wherein the first service type and the second service type are one of an enhanced mobile broadband (eMBB) service or an ultra-reliable low-latency communications (URLLC) service.

18. The method of claim 1 , wherein the first service type and the second service type are different classes of an ultra-reliable low-latency communications (URLLC) service.

19. A method for wireless communication at a base station, comprising:

scheduling transmission on a first channel associated with a first service type;

scheduling transmission on a second channel associated with a second service type, wherein the second channel is scheduled to at least partially overlap with the first channel and scheduling transmission on the second channel is based on a predetermined condition; and

receiving a higher priority channel, wherein the higher priority channel is based at least in part on respective priorities of the first service type and the second service type determined by the UE, and wherein the higher priority channel is received with a transmission power that is greater than other transmission powers used for other simultaneous transmissions on channels that partially overlap with the higher priority channel based at least in part on the UE being power-limited.

20. The method of claim 19 , wherein the first service type and the second service type are one of an enhanced mobile broadband (eMBB) service or an ultra-reliable low-latency communications (URLLC) service.

21. The method of claim 19 , wherein scheduling transmission on the second channel based on the predetermined condition comprises:

identifying a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap.

22. The method of claim 21 , further comprising:

receiving uplink control information on the higher priority channel for a plurality of the channels that satisfy the set of uplink control information multiplexing rules.

23. The method of claim 19 , further comprising:

receiving a transmission on a channel with reduced power.

24. The method of claim 19 , wherein the first channel and the second channel are one of a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

25. An apparatus for wireless communication at a user equipment (UE), comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to:

identify that the UE is scheduled to transmit on a first channel associated with a first service type;

identify that the UE is scheduled to transmit on a second channel associated with a second service type, and that the second channel is scheduled to at least partially overlap with the first channel;

determine that one of the first channel or the second channel is a higher priority channel based at least in part on respective priorities of the first service type and the second service type;

determine that the UE supports simultaneous transmission of partially overlapping channels and that the UE is power-limited; and

transmit a message on the higher priority channel, based at least in part on the UE being power-limited.

26. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine that the UE is to transmit on only one of the first channel or the second channel based on the second channel being scheduled to at least partially overlap with the first channel and based on a predetermined condition.

27. The apparatus of claim 25 , wherein the instructions for determining that the UE is to transmit on only one of the first channel or the second channel based on a predetermined condition comprise instructions that are further executable by the processor to cause the apparatus to:

identify a set of uplink control information multiplexing rules that define conditions for multiplexing uplink control information on a single channel when multiple channels overlap; and

determine that the set of uplink control information multiplexing rules are not satisfied.

28. An apparatus for wireless communication at a base station, comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to:

schedule transmission on a first channel associated with a first service type;

schedule transmission on a second channel associated with a second service type, wherein the second channel is scheduled to at least partially overlap with the first channel and scheduling transmission on the second channel is based on a predetermined condition; and

receive a higher priority channel, wherein the higher priority channel is based at least in part on respective priorities of the first service type and the second service type determined by the UE, and wherein the higher priority channel is received with a transmission power that is greater than other transmission powers used for other simultaneous transmissions on channels that partially overlap with the higher priority channel based at least in part on the UE being power-limited.

29. The apparatus of claim 28 , wherein the first service type and the second service type are one of an enhanced mobile broadband (eMBB) service or an ultra-reliable low-latency communications (URLLC) service.