# US 2020/0288371 A1 · Reporting new beam information in a beam failure recovery procedure

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- Number: US 2020/0288371 A1
- Document ID: US20200288371A1
- Status: Published application
- Kind: A1
- Application number: 16/797,849
- Filed: 2020-02-21
- Published: 2020-09-10
- Earliest claimed: 2019-03-05
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Yan ZHOU; Tao LUO; Jung Ho RYU; Tianyang BAI; Kiran VENUGOPAL
- Web page: https://patentgrep.com/patent/US20200288371A1

## CPC

- H04B 7/0617: {for beam forming}
- H04W 36/305: {Handover due to radio link failure (control signalling for hand-off failure H04W36/0079)}
- H04W 36/0058: {Transmission of hand-off measurement information, e.g. measurement reports}
- H04W 36/06: Reselecting a communication resource in the serving access point
- H04W 36/085: {involving beams of access points}
- H04W 36/36: by user or terminal equipment
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

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.

## Claims

### Claim 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; and
transmitting, 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 2)

The method of claim 2, wherein determining whether to include the NBI field in the communication comprises:
determining that one or more reference signals are configured for the one or more candidate beams;
determining that a beam quality threshold is configured for the one or more reference signals;
generating, based at least in part on determining that the beam quality threshold is configured for the one or more reference signals, respective beam quality measurements for the one or more candidate beams; and
determining whether to include the NBI field in the communication based at least in part on determining whether any of the respective beam quality measurements satisfy the beam quality threshold.

### Claim 4 (depends on 3)

The method of claim 3, 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.

### Claim 5 (depends on 3)

The method of claim 3, wherein determining whether to include the NBI field in the communication comprises:
determining to include the NBI field in the communication based at least in part on determining that a beam quality measurement, of the respective beam quality measurements, associated with a candidate beam, of the one or more candidate beams, satisfies the beam quality threshold.

### Claim 6 (depends on 5)

The method of claim 5, wherein 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.

### Claim 7 (depends on 3)

The method of claim 3, wherein determining whether to include the NBI field in the communication comprises:
determining that none of the respective beam quality measurements satisfy the beam quality threshold; and
determining to include the NBI field in the communication based at least in part on determining that none of the respective beam quality measurements satisfy the beam quality threshold.

### Claim 8 (depends on 7)

The method of claim 7, wherein the NBI field includes at least one of:
an indication that none of the respective beam quality measurements satisfy the beam quality threshold,
an indication of a selection of a new beam of the one or more candidate beams, or
an indication that the beam quality measurement, associated with the new beam, does not satisfy the beam quality threshold.

### Claim 9 (depends on 8)

The method of claim 8, wherein the indication of the selection of the new beam comprises:
an indication of a beam index associated with the new beam.

### Claim 10 (depends on 2)

The method of claim 2, wherein determining whether to include the NBI field in the communication comprises:
determining that one or more reference signals are configured for the one or more candidate beams;
determining whether a beam quality threshold is configured for the one or more reference signals; and
determining whether to include the NBI field in the communication based at least in part on determining whether the beam quality threshold is configured for the one or more reference signals.

### Claim 11 (depends on 10)

The method of claim 10, wherein determining whether the beam quality threshold is configured for the one or more reference signals comprises:
determining that the beam quality threshold is not configured for the one or more reference signals; and
wherein determining whether to include the NBI field in the communication comprises:
determining to include the NBI field in the communication based at least in part on determining that the beam quality threshold is not configured for the one or more reference signals.

### Claim 12 (depends on 11)

The method of claim 11, wherein the NBI field includes:
an indication that no new beam of the one or more candidate beams is selected, or
an indication of a selection of a new beam of the one or more candidate beams based at least in part on a beam quality measurement, associated with the new beam, of the one or more reference signals.

### Claim 13 (depends on 12)

The method of claim 12, wherein the indication of a selection of a new beam comprises:
an indication of a beam index associated with the new beam.

### Claim 14 (depends on 1)

The method of claim 1, wherein the communication is a beam failure recovery request (BFRQ) communication.

### Claim 15 (depends on 1)

The method of claim 1, wherein identifying the one or more candidate beams comprises:
detecting a failure associated with the other beam.

### Claim 16

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 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; 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 and/or contents of the NBI field.

### Claim 17 (depends on 16)

The UE of claim 16, wherein the one or more processors are further to determine whether to include the NBI field in the communication; and
wherein the one or more processors, when determining whether to include the NBI field in the communication, are to:
determine that one or more reference signals are configured for the one or more candidate beams;
determine that a beam quality threshold is configured for the one or more reference signals;
generate, based at least in part on determining that the beam quality threshold is configured for the one or more reference signals, respective beam quality measurements for the one or more candidate beams; and
determine whether to include the NBI field in the communication based at least in part on determining whether any of the respective beam quality measurements satisfy the beam quality threshold.

### Claim 18 (depends on 17)

The UE of claim 17, 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.

### Claim 19 (depends on 17)

The UE of claim 17, wherein the one or more processors, when determining whether to include the NBI field in the communication, are to:
determine that none of the respective beam quality measurements satisfy the beam quality threshold; and
determine to include the NBI field in communication based at least in part on determining that none of the respective beam quality measurements satisfy the beam quality threshold.

### Claim 20 (depends on 19)

The UE of claim 19, wherein the NBI field includes at least one of:
an indication that none of the respective beam quality measurements satisfy the beam quality threshold,
an indication of a selection of a new beam of the one or more candidate beams, or
an indication that the beam quality measurement, associated with the new beam, does not satisfy the beam quality threshold.

### Claim 21

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;
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.

### Claim 22 (depends on 21)

The method of claim 21, 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 communication to include an indication that none of the respective beam quality measurements satisfy the beam quality threshold.

### Claim 23 (depends on 21)

The method of claim 21, 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.

### Claim 24 (depends on 21)

The method of claim 21, 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.

### Claim 25 (depends on 21)

The method of claim 21, wherein the communication is a beam failure recovery request (BFRQ) communication.

### Claim 26

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 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,
wherein the one or more candidate beams are different from the failed beam;
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.

### Claim 27 (depends on 26)

The UE of claim 26, 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 communication to include an indication that none of the respective beam quality measurements satisfy the beam quality threshold.

### Claim 28 (depends on 26)

The UE of claim 26, 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.

### Claim 29 (depends on 26)

The UE of claim 26, 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.

### Claim 30 (depends on 26)

The UE of claim 26, wherein the communication is a beam failure recovery request (BFRQ) communication.
