User equipment beam management

Patent metadata

Field	Value
Publication number	US-12452015-B2
Application number	US-202217931069-A
Country	US
Kind code	B2
Filing date	Sep 9, 2022
Priority date	Sep 9, 2022
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a slot or a symbol where a channel state information reference signal (CSI-RS) for a Procedure 2 (P2) resource is to be scheduled. The UE may schedule a candidate UE beam or a serving UE beam for the slot or the symbol. The UE may measure a spectral efficiency associated with the P2 resource. The UE may prepare a report that indicates one or more characteristics of the candidate UE beam or the serving UE beam. Numerous other aspects are described.

First claim

What is claimed is:

1. An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
identify a plurality of candidate UE beams for measuring a channel state information reference signal (CSI-RS) for a Procedure 2 (P2) resource based at least in part on synchronization signal block (SSB) measurements associated with the plurality of candidate UE beams;
identify a slot or a symbol where the CSI-RS for the P2 resource is to be scheduled;
schedule a candidate UE beam of the plurality of candidate UE beams or a serving UE beam for the slot or the symbol;
measure a spectral efficiency associated with the P2 resource; and
prepare a report that indicates one or more characteristics of the candidate UE beam or the serving UE beam.

2. The apparatus of claim 1 , wherein the report indicates at least one of a last measurement associated with the serving UE beam or a last measurement associated with the candidate UE beam during a current measuring occasion.

3. The apparatus of claim 2 , wherein the report indicates the last measurement associated with the serving UE beam and the last measurement associated with the candidate UE beam during the current measuring occasion.

4. The apparatus of claim 1 , wherein the one or more processors are further configured to transmit an indication of the report, to a network entity, that indicates the one or more characteristics of the candidate UE beam or the serving UE beam.

5. The apparatus of claim 1 , wherein the one or more processors are further configured to process the spectral efficiency associated with the P2 resource for a beam selection process.

6. The apparatus of claim 5 , wherein the one or more processors, to process the spectral efficiency, are configured to process the spectral efficiency separately for each rank of a plurality of ranks.

7. The apparatus of claim 5 , wherein the one or more processors, to process the spectral efficiency, are configured to perform a filtering operation, a biasing operation, or a thresholding operation.

8. The apparatus of claim 5 , wherein the one or more processors are further configured to initiate the beam selection process based at least in part on processing the spectral efficiency associated with the P2 resource.

9. The apparatus of claim 1 , wherein identifying the slot or the symbol where the CSI-RS for the P2 resource is to be scheduled comprises predicting the slot or the symbol where the CSI-RS for the P2 resource is to be scheduled.

10. The apparatus of claim 1 , wherein the one or more processors, to schedule the candidate UE beam or the serving UE beam for the slot or the symbol, are configured to schedule the candidate UE beam or the serving UE beam for the symbol, and extend the scheduling of the candidate UE beam or the serving UE beam for the symbol for a duration of the slot.

11. The apparatus of claim 10 , wherein the slot includes a physical downlink control channel and a physical downlink shared channel, and wherein the physical downlink shared channel is frequency division multiplexed on a same symbol as the CSI-RS.

12. The apparatus of claim 1 , wherein the one or more processors are further configured to communicate using a select beam, of the candidate UE beam or the serving UE beam, for multiple slots in a time window around the slot.

13. The apparatus of claim 12 , wherein the one or more processors, to communicate using the select beam for the multiple slots in the time window around the slot, are configured to communicate using the select beam for all sub-channels within the time window around the slot.

14. A method of wireless communication performed by a user equipment (UE), comprising:
identifying a plurality of candidate UE beams for measuring a channel state information reference signal (CSI-RS) for a Procedure 2 (P2) resource based at least in part on synchronization signal block (SSB) measurements associated with the plurality of candidate UE beams;
identifying a slot or a symbol where the CSI-RS for the P2 resource is to be scheduled;
scheduling a candidate UE beam of the plurality of candidate UE beams or a serving UE beam for the slot or the symbol;
measuring a spectral efficiency associated with the P2 resource; and
preparing a report that indicates one or more characteristics of the candidate UE beam or the serving UE beam.

15. The method of claim 14 , wherein the report indicates at least one of a last measurement associated with the serving UE beam or a last measurement associated with the candidate UE beam during a current measuring occasion.

16. The method of claim 15 , wherein the report indicates the last measurement associated with the serving UE beam and the last measurement associated with the candidate UE beam during the current measuring occasion.

17. The method of claim 14 , further comprising transmitting an indication of the report, to a network entity, that indicates the one or more characteristics of the candidate UE beam or the serving UE beam.

18. The method of claim 14 , further comprising processing the spectral efficiency associated with the P2 resource for a beam selection process.

19. The method of claim 18 , wherein processing the spectral efficiency comprises processing the spectral efficiency separately for each rank of a plurality of ranks.

20. The method of claim 18 , wherein processing the spectral efficiency comprises performing a filtering operation, a biasing operation, or a thresholding operation.

21. The method of claim 18 , further comprising initiating the beam selection process based at least in part on processing the spectral efficiency associated with the P2 resource.

22. The method of claim 14 , wherein identifying the slot or the symbol where the CSI-RS for the P2 resource is to be scheduled comprises predicting the slot or the symbol where the CSI-RS for the P2 resource is to be scheduled.

23. The method of claim 14 , wherein scheduling the candidate UE beam or the serving UE beam for the slot or the symbol comprises scheduling the candidate UE beam or the serving UE beam for the symbol, and extending the scheduling of the candidate UE beam or the serving UE beam for the symbol for a duration of the slot.

24. The method of claim 23 , wherein the slot includes a physical downlink control channel and a physical downlink shared channel, and wherein the physical downlink shared channel is frequency division multiplexed on a same symbol as the CSI-RS.

25. The method of claim 14 , further comprising communicating using a select beam, of the candidate UE beam or the serving UE beam, for multiple slots in a time window around the slot.

26. The method of claim 25 , wherein communicating using the select beam for the multiple slots in the time window around the slot comprises communicating using the select beam for all sub-channels within the time window around the slot.

27. 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:
identify a plurality of candidate UE beams for measuring a channel state information reference signal (CSI-RS) for a Procedure 2 (P2) resource based at least in part on synchronization signal block (SSB) measurements as

Assignees

• Qualcomm Inc

Inventors

• Zhu Jun
• Gorokhov Alexei Yurievitch
• Challa Raghu Narayan

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04B7/06962

  Simultaneous selection of transmit [Tx] and receive [Rx] beams at both sides of a link · CPC title

• H04L5/0025

  Spatial division following the spatial signature of the channel · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04L5/0051 Primary

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title