Dynamic beam-switching latency for beam refinement procedures

1. A method for wireless communications by a user equipment (UE), comprising:

receiving, from a base station (BS), signaling configuring the UE with one or more reference signal (RS) resource sets, wherein each of the one or more RS resource sets is associated with a first type of beam refinement procedure or a second type of beam refinement procedure;

sending an indication to the BS of at least a first latency and a second latency, the second latency being longer than the first latency;

receiving, from the BS, downlink control information (DCI) triggering one or more RS transmissions using a RS resource set, of the one or more RS resource sets, associated with the second type of beam refinement procedure; and

determining to monitor the one or more RS transmissions after the first latency or the second latency after the DCI.

2. The method of claim 1 , wherein the one or more RS transmissions comprises one or more aperiodic channel state information RS (A-CSI-RS) transmissions.

3. The method of claim 1 , wherein the first type of beam refinement procedure comprises:

receiving, from the BS, repeated RS transmissions over a plurality of symbols, wherein each of the repeated RS transmissions is associated with a different BS transmit beam,

measuring the repeated RS transmissions with one or more UE receive beams in one or more UE antenna panels associated with the one or more of the configured one or more RS resource sets, and

sending, to the BS, an indication of at least one of: one or more BS transmit beams of the different BS transmit beams or a signal quality associated with the one or more BS transmit beams.

4. The method of claim 3 , wherein the one or more UE antenna panels includes both active UE antenna panels and idle UE antenna panels when triggered by the DCI.

5. The method of claim 1 , wherein the second type of beam refinement procedure comprises:

receiving, from the BS, repeated RS transmissions over a plurality of symbols, wherein the repeated RS transmissions are associated with a same BS transmit beam, and

measuring the repeated RS transmissions with one or more UE receive beams in one or more UE antenna panels associated with the one or more of the configured one or more RS resource sets.

6. The method of claim 5 , wherein the second type of beam refinement procedure further comprises sending an indication to the BS of at least one of: one or more of the UE receive beams or a signal quality associated with the one or more of the UE receive beams.

7. The method of claim 5 , wherein the one or more UE antenna panels includes both active UE antenna panels and idle UE antenna panels when triggered by the DCI.

8. The method of claim 1 , further comprising monitoring one or more RS transmissions at the first latency when using a RS resource set associated with the first type of beam refinement procedure.

9. The method of claim 1 , wherein:

the first latency comprises a recommended latency for the first type of beam refinement procedure, and

the second latency comprises a recommended latency for the second type of beam refinement procedure.

10. The method of claim 1 , wherein determining to monitor the one or more RS transmissions at the first latency or the second latency comprises:

after receiving the DCI, monitoring at one of the first latency or the second latency for the one or more RS transmissions,

when the one or more RS transmissions are not received at the monitored one of the first latency or second latency, monitoring at the other one of the first latency or the second latency for the one or more RS transmissions, and

monitoring for RS transmissions at the other one of the first latency or the second latency after subsequent DCIs.

11. The method of claim 1 , wherein:

the method further comprises, for each of the one or more RS transmissions, receiving an indication from the BS of a selected latency, and

the determination to monitor at the first latency or the second latency is based on the indication from the BS.

12. The method of claim 11 , wherein the indication of the selected latency is received in the DCI triggering the one or more RS transmissions.

13. The method of claim 1 , further comprising sending an indication to the BS of a preferred latency.

14. The method of claim 13 , wherein the indication of the preferred latency is provided autonomously or in response to a request from the BS.

15. The method of claim 13 , wherein the indication of the preferred latency is provided via at least one of: a periodic physical uplink control channel (PUCCH) transmission, a semi-persistent PUCCH transmission, an aperiodic PUCCH transmission, or an aperiodic physical uplink shared channel (PUSCH) transmission.

16. The method of claim 13 , further comprising receiving signaling from the BS configuring the UE to report the indication of the preferred latency via at least one of: a flag in radio resource control (RRC) signaling associated with the configured report, a medium access control (MAC) control element (CE) activating the configured report, or the DCI triggering the one or more RS transmission using the RS resource set.

17. An apparatus for wireless communications, comprising:

means for receiving, from a base station (BS), signaling configuring the apparatus with one or more reference signal (RS) resource sets, wherein each of the one or more RS resource sets is associated with a first type of beam refinement procedure or a second type of beam refinement procedure;

means for sending an indication to the BS of at least a first latency and a second latency, the second latency being longer than the first latency;

means for receiving, from the BS, downlink control information (DCI) triggering one or more RS transmissions using a RS resource set, of the one or more RS resource sets, associated with the second type of beam refinement procedure; and

means for determining to monitor the one or more RS transmissions after the first latency or the second latency after the DCI.

18. An apparatus for wireless communications, comprising:

a memory; and

at least one processor coupled to the memory, the memory and the at least one processor being configured to:

receive, from a base station (BS), signaling configuring the apparatus with one or more reference signal (RS) resource sets, wherein each of the one or more RS resource sets is associated with a first type of beam refinement procedure or a second type of beam refinement procedure;

send an indication to the BS of at least a first latency and a second latency, the second latency being longer than the first latency;

receive, from the BS, downlink control information (DCI) triggering one or more RS transmissions using a RS resource set associated with the second type of beam refinement procedure; and

determine to monitor the one or more RS transmissions after the first latency or the second latency after the DCI.

19. A non-transitory computer readable medium having instructions stored thereon for:

receiving, from a base station (BS), signaling configuring a user equipment (UE) with one or more reference signal (RS) resource sets, wherein each of the one or more RS resource sets is associated with a first type of beam refinement procedure or a second type of beam refinement procedure;

sending an indication to the BS of at least a first latency and a second latency, the second latency being longer than the first latency;

receiving, from the BS, downlink control information (DCI) triggering one or more RS transmissions using a RS resource set associated with the second type of beam refinement procedure; and

determine to monitor the one or more RS transmissions after the first latency or the second latency after the DCI.

20. The method of claim 1 , wherein each of the first latency and the second latency comprises a latency between receiving the DCI and monitoring the RS transmissions.