Techniques and apparatuses for user equipment-requested beam pair link procedure
Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine whether to perform a beam pair refinement procedure with regard to the UE and a base station; and/or transmit, to the base station, information regarding whether to perform the beam pair refinement procedure. In some aspects, a base station may receive, from a UE, information regarding a beam pair refinement procedure with regard to the UE; and/or perform the beam pair refinement procedure based at least in part on the information. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a base station, an instruction regarding a threshold;
determining to request a beam pair refinement procedure with regard to the UE and the base station when a performance of a beam pair link does not satisfy the threshold and based at least in part on an improvement predicted to be achieved by performing the beam pair refinement procedure; and
transmitting, to the base station, information based on determining to request the beam pair refinement procedure.
2. The method of claim 1 , wherein the information identifies a length of a waveform of the beam pair refinement procedure,
wherein the length is determined by the UE.
3. The method of claim 2 , wherein the length is based at least in part on a number of UE-side beams that are to be evaluated in the beam pair refinement procedure.
4. The method of claim 2 , wherein the length is based at least in part on a path loss between the UE and the base station.
5. The method of claim 2 , wherein the length is based at least in part on a beam switching speed of the UE.
6. The method of claim 1 ,
wherein the information identifies the improvement, and
wherein the improvement is an expected improvement of array gain after performing the beam pair refinement procedure.
7. The method of claim 1 , wherein the information is transmitted after a beam pair establishment procedure is performed between the UE and the base station.
8. The method of claim 1 , wherein the beam pair refinement procedure has a sub-symbol measurement duration based at least in part on a symbol with a differently scaled numerology.
9. The method of claim 1 , wherein the information regarding whether to perform the beam pair refinement procedure includes a request to perform the beam pair refinement procedure.
10. A method of wireless communication performed by a base station, comprising:
transmitting, to a user equipment (UE), an instruction including information identifying a threshold;
receiving a request to perform a beam pair refinement procedure with regard to the UE after the UE determines to request the beam pair refinement procedure based on a performance of a beam pair link not satisfying the threshold and based at least in part on an improvement predicted to be achieved by performing the beam pair refinement procedure; and
selectively performing the beam pair refinement procedure based at least in part on the request.
11. The method of claim 10 , wherein the request identifies a length of a waveform of the beam pair refinement procedure, and the beam pair refinement procedure is performed based at least in part on the length,
wherein the length was determined by the UE.
12. The method of claim 10 ,
wherein the request identifies the improvement,
wherein the improvement is an expected improvement in array gain associated with the beam pair refinement procedure, and
wherein selectively performing the beam pair refinement procedure comprises:
scheduling the beam pair refinement procedure based at least in part on the expected improvement.
13. The method of claim 10 , further comprising:
determining whether to perform the beam pair refinement procedure based at least in part on an amount of traffic associated with the UE.
14. The method of claim 10 , wherein the request is received from the UE.
15. The method of claim 10 , wherein the request is received from a serving base station (BS) of the UE, and wherein the base station is a neighbor base station (BS) of the UE.
16. The method of claim 15 , wherein the request is received from the serving BS based at least in part on the request indicating that the request is to be provided to the neighbor BS.
17. The method of claim 10 , wherein the beam pair refinement procedure is embedded in another beam pair procedure.
18. A user equipment (UE) for wireless communication, comprising:
a memory; and
at least one processor operatively coupled to the memory, the memory and the at least one processor configured to:
receive, from a base station, an instruction regarding a threshold;
determine to request a beam pair refinement procedure with regard to the UE and the base station when a performance of a beam pair link does not satisfy the threshold and based at least in part on an improvement predicted to be achieved by performing the beam pair refinement procedure; and
transmit, to the base station, information based on determining to request the beam pair refinement procedure.
19. The UE of claim 18 , wherein the information identifies a length of a waveform of the beam pair refinement procedure,
wherein the length is determined by the UE.
20. The UE of claim 19 , wherein the length is based at least in part on a number of UE-side beams that are to be evaluated in the beam pair refinement procedure.
21. The UE of claim 19 , wherein the length is based at least in part on a path loss between the UE and the base station.
22. The UE of claim 19 , wherein the length is based at least in part on a beam switching speed of the UE.
23. The UE of claim 18 ,
wherein the information identifies the improvement, and
wherein the improvement is an expected improvement of array gain after performing the beam pair refinement procedure.
24. The UE of claim 18 , wherein the information is transmitted after a beam pair establishment procedure is performed between the UE and the base station.
25. The UE of claim 18 , wherein the beam pair refinement procedure has a sub-symbol measurement duration based at least in part on symbol with a differently scaled numerology.
26. The UE of claim 18 , wherein the information regarding whether to perform the beam pair refinement procedure includes a request to perform the beam pair refinement procedure.
27. A base station for wireless communication, comprising:
a memory; and
at least one processor operatively coupled to the memory, the memory and the at least one processor configured to:
transmit, to a user equipment (UE), an instruction including information identifying a threshold;
receive a request to perform a beam pair refinement procedure with regard to the UE after the UE determines to request the beam pair refinement procedure based on a performance of a beam pair link not satisfying the threshold and based at least in part on an improvement predicted to be achieved by performing the beam pair refinement procedure; and
selectively perform the beam pair refinement procedure based at least in part on the request.
28. The base station of claim 27 , wherein the request identifies a length of a waveform of the beam pair refinement procedure, and the beam pair refinement procedure is performed based at least in part on the length,
wherein the length was determined by the UE.
29. The base station of claim 27 ,
wherein the request identifies the improvement,
wherein the improvement is an expected improvement in array gain associated with the beam pair refinement procedure, and
wherein, when selectively performing the beam pair refinement procedure, the memory and the at least one processor are configured to:
schedule the beam pair refinement procedure based at least in part on the expected improvement.
30. The base station of claim 27 , wherein the at least one processor is further to:
determine whether to perform the beam pair refinement procedure based at least in part on an amount of traffic associated with the UE.