Reporting new beam information in a beam failure recovery procedure
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify one or more candidate beams available for communication between the UE and a BS to replace another beam that is configured for communicating between the UE and the BS. The UE may transmit, based at least in part on identifying the one or more candidate beams, a communication that includes a new beam information (NBI) field and/or contents of the NBI field. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
identifying one or more candidate beams available for communication between the UE and a base station (BS) to replace another beam that is configured for communicating between the UE and the BS,
the one or more candidate beams configured for beam failure recovery in a secondary cell (SCell); and
transmitting, based at least in part on the one or more candidate beams, a communication that includes a new beam information (NBI) field,
the NBI field comprising contents based at least in part on whether a beam quality measurement for a beam, of the one or more candidate beams, satisfies a beam quality threshold, and
the beam quality threshold being configured if candidate beam reference signals are configured for beam failure recovery in the SCell.
2. The method of claim 1 , further comprising:
determining whether to include the NBI field and/or the contents of the NBI field in the communication.
3. The method of claim 2 , wherein determining whether to include the NBI field in the communication comprises:
determining that the candidate beam reference signals are configured for the one or more candidate beams;
determining that the beam quality threshold is configured for the one or more candidate beam reference signals; and
determining to include the NBI field in the communication based at least in part on determining the beam quality threshold is configured for the candidate beam reference signals.
4. The method of claim 1 , wherein the beam quality threshold comprises at least one of:
a reference signal received power (RSRP) threshold,
a reference signal received quality (RSRQ) threshold,
a signal to interference plus noise ratio (SINR) threshold, or
a received signal strength indicator (RSSI) threshold.
5. The method of claim 1 , wherein, when a candidate beam, of the one or more candidate beams, is determined to have the beam quality measurement that satisfies the beam quality threshold, the NBI field includes at least one of:
an indication of a beam index associated with the candidate beam, or
an indication that the beam measurement, associated with the candidate beam, satisfies the beam quality threshold.
6. The method of claim 1 , wherein, when a candidate beam, of the one or more candidate beams, is determined to have the beam quality measurement that satisfies the beam quality threshold, the NBI field includes an indication of a selection of a new beam of the one or more candidate beams.
7. The method of claim 6 , wherein the indication of the selection of the new beam comprises:
an indication of a beam index associated with the new beam.
8. The method of claim 1 , wherein the communication is a beam failure recovery request (BFRQ) communication.
9. The method of claim 1 , wherein identifying the one or more candidate beams comprises:
detecting a failure associated with the other beam.
10. The method of claim 1 , wherein the NBI field includes:
an indication that no new beam of the one or more candidate beams is selected.
11. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory, the memory and the one or more processors configured to:
identify one or more candidate beams available for communication between the UE and a base station (BS) to replace another beam that is configured for communicating between the UE and the BS,
the one or more candidate beams configured for beam failure recovery in a secondary cell (SCell); and
transmit, based at least in part on identifying the one or more candidate beams, a communication that includes a new beam information (NBI) field,
the NBI field comprising contents based at least in part on whether a beam quality measurement for a beam, of the one or more candidate beams, satisfies a beam quality threshold, and
the beam quality threshold being configured if candidate beam reference signals are configured for beam failure recovery in the SCell.
12. The UE of claim 11 , wherein the beam quality threshold comprises at least one of:
a reference signal received power (RSRP) threshold,
a reference signal received quality (RSRQ) threshold,
a signal to interference plus noise ratio (SINR) threshold, or
a received signal strength indicator (RSSI) threshold.
13. The UE of claim 11 , wherein, when a candidate beam, of the one or more candidate beams, is determined to have the beam quality measurement that satisfies the beam quality threshold, the NBI field includes:
an indication of a selection of a new beam of the one or more candidate beams.
14. The UE of claim 11 , wherein the NBI field includes:
an indication that no new beam of the one or more candidate beams is selected.
15. A method of wireless communication performed by a user equipment (UE), comprising:
detecting a beam failure of a beam that is used for communication between the UE and a base station (BS);
identifying one or more candidate beams available for communication between the UE and the BS,
wherein the one or more candidate beams are different from the failed beam, and
wherein the one or more candidate beams are configured for beam failure recovery in a secondary cell (SCell);
generating respective beam quality measurements for the one or more candidate beams based at least in part on one or more reference signals configured for the one or more candidate beams; and
configuring a new beam information (NBI) field in a communication based at least in part on whether the respective beam quality measurements satisfy a beam quality threshold configured for the one or more reference signals,
the beam quality threshold being configured if the one or more reference signals are configured for beam failure recovery in the SCell.
16. The method of claim 15 , wherein configuring the NBI field in the communication comprises:
determining that none of the respective beam quality measurements satisfy the beam quality threshold; and
configuring the NBI field in the communication to include an indication of a selection of a new beam, of the one or more candidate beams, having a highest beam quality measurement of the one or more candidate beams.
17. The method of claim 15 , wherein configuring the NBI field in the communication comprises:
determining that none of the respective beam quality measurements satisfy the beam quality threshold; and
configuring the NBI field in the communication to include an indication that no new beam is selected.
18. The method of claim 15 , wherein the communication is a beam failure recovery request (BFRQ) communication.
19. The method of claim 15 , wherein the NBI field includes:
an indication that no new beam of the one or more candidate beams is selected.
20. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
detect a beam failure of a beam that is used for communication between the UE and a base station (BS);
identify one or more candidate beams available for communication between the UE and the BS,
the one or more candidate beams being different from the failed beam, and
the one or more candidate beams configured for beam failure recovery in a secondary cell (SCell);
generate respective beam quality measurements for the one or more candidate beams based at least in part on one or more reference signals configured for the one or more candidate beams; and
configure a new beam information (NBI) field in a communication based at least in part on whether the respective beam quality measurements satisfy a beam quality threshold configured for the one or more reference signals,
the beam quality threshold being configured if the one or more reference signals are configured for beam failure recovery in the SCell.
21. The UE of claim 20 , wherein the one or more processors, when configuring the NBI field in the communication, are to:
determine that none of the respective beam quality measurements satisfy the beam quality threshold; and
configure the NBI field in the communication to include an indication of a selection of a new beam, of the one or more candidate beams, having a highest beam quality measurement of the one or more candidate beams.
22. The UE of claim 20 , wherein the one or more processors, when configuring the NBI field in the communication, are to:
determine that none of the respective beam quality measurements satisfy the beam quality threshold; and
configure the NBI field in the communication to include an indication that no new beam is selected.
23. The UE of claim 20 , wherein the communication is a beam failure recovery request (BFRQ) communication.
24. The UE of claim 20 , wherein the NBI field includes:
an indication that no new beam of the one or more candidate beams is selected.