Signaling of UE intra/inter-panel beam switch latency
Certain aspects of the present disclosure relate to methods and apparatus for signaling of UE intra/inter-panel beam switch latency using communications systems operating according to new radio (NR) technologies. For example, the method generally includes determining at least a first latency associated with a beam switch across at least first and second antenna array modules, wherein the first latency is greater than or equal to a second latency associated with a beam switch within the first or second antenna module, and signaling a second device an indication of when to assume the first latency for a beam switch at the first device.
1. A method for wireless communications by a first device, comprising:
transmitting, from the first device to a second device, a first indication of a first beam switch latency supported by the first device, wherein the first beam switch latency is associated with a beam switch across at least a first antenna array module and a second antenna array module of the first device, wherein the first beam switch latency is greater than a second beam switch latency associated with a beam switch within one of the first antenna array module or the second antenna array module;
receiving, from the second device, a second indication triggering communication of one or more reference signals; and
receiving, from the second device, the one or more reference signals after receiving the second indication, wherein a delay between receiving the second indication and the one or more reference signals is based on the first beam switch latency.
2. The method of claim 1 , wherein the delay is further based on the second beam switch latency.
3. The method of claim 1 , wherein the second indication comprises a downlink control information, and the one or more reference signals comprise one or more aperiodic channel state information reference signals (ACSI-RSs).
4. The method of claim 1 , wherein the first device comprises a user equipment (UE), and wherein the second device comprises a base station (BS).
5. The method of claim 1 , wherein communication of the one or more reference signals is part of a P3 beam management.
6. The method of claim 1 , wherein the first device receives the one or more reference signals using a plurality of different receive beams.
7. A first device, comprising:
a first antenna array module;
a second antenna array module;
a memory; and
a processor coupled to the memory, the memory and the processor being configured to:
transmit, to a second device, a first indication of a first beam switch latency supported by the first device, wherein the first beam switch latency is associated with a beam switch across at least the first antenna array module and the second antenna array module, wherein the first beam switch latency is greater than a second beam switch latency associated with a beam switch within one of the first antenna array module or the second antenna array module;
receive, from the second device, a second indication triggering communication of one or more reference signals; and
receive, from the second device, the one or more reference signals after receiving the second indication, wherein a delay between receiving the second indication and the one or more reference signals is based on the first beam switch latency.
8. The first device of claim 7 , wherein the delay is further based on the second beam switch latency.
9. The first device of claim 7 , wherein the second indication comprises a downlink control information, and the one or more reference signals comprise one or more aperiodic channel state information reference signals (ACSI-RSs).
10. The first device of claim 7 , wherein the first device comprises a user equipment (UE), and wherein the second device comprises a base station (BS).
11. The first device of claim 7 , wherein communication of the one or more reference signals is part of a P3 beam management.
12. The first device of claim 7 , wherein the first device receives the one or more reference signals using a plurality of different receive beams.
13. A first device, comprising:
means for transmitting, to a second device, a first indication of a first beam switch latency supported by the first device, wherein the first beam switch latency is associated with a beam switch across at least a first antenna array module and a second antenna array module of the first device, wherein the first beam switch latency is greater than a second beam switch latency associated with a beam switch within one of the first antenna array module or the second antenna array module;
means for receiving, from the second device, a second indication triggering communication of one or more reference signals; and
means for receiving, from the second device, the one or more reference signals after receiving the second indication, wherein a delay between receiving the second indication and the one or more reference signals is based on the first beam switch latency.
14. The first device of claim 13 , wherein the delay is further based on the second beam switch latency.
15. The first device of claim 13 , wherein the second indication comprises a downlink control information, and the one or more reference signals comprise one or more aperiodic channel state information reference signals (A-CSI-RSs).
16. The first device of claim 13 , wherein the first device comprises a user equipment (UE), and wherein the second device comprises a base station (BS).
17. The first device of claim 13 , wherein communication of the one or more reference signals is part of a P3 beam management.
18. The first device of claim 13 , wherein the first device receives the one or more reference signals using a plurality of different receive beams.
19. A non-transitory computer readable medium storing instructions that when executed by a first device cause the first device to perform a method for wireless communications, the method comprising:
transmitting, from the first device to a second device, a first indication of a first beam switch latency supported by the first device, wherein the first beam switch latency is associated with a beam switch across at least a first antenna array module and a second antenna array module of the first device, wherein the first beam switch latency is greater than a second beam switch latency associated with a beam switch within one of the first antenna array module or the second antenna array module;
receiving, from the second device, a second indication triggering communication of one or more reference signals; and
receiving, from the second device, the one or more reference signals after receiving the second indication, wherein a delay between receiving the second indication and the one or more reference signals is based on the first beam switch latency.
20. The non-transitory computer readable medium of claim 19 , wherein the delay is further based on the second beam switch latency.
21. The non-transitory computer readable medium of claim 19 , wherein the second indication comprises a downlink control information, and the one or more reference signals comprise one or more aperiodic channel state information reference signals (A-CSI-RSs).
22. The non-transitory computer readable medium of claim 19 , wherein the first device comprises a user equipment (UE), and wherein the second device comprises a base station (BS).
23. The non-transitory computer readable medium of claim 19 , wherein communication of the one or more reference signals is part of a P3 beam management.
24. The non-transitory computer readable medium of claim 19 , wherein the first device receives the one or more reference signals using a plurality of different receive beams.