# US 2022/0286192 A1 · Group-based beam management

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- Number: US 2022/0286192 A1
- Document ID: US20220286192A1
- Status: Published application
- Kind: A1
- Application number: 17/825,789
- Filed: 2022-05-26
- Published: 2022-09-08
- Earliest claimed: 2016-11-02
- Assignees: IDAC Holdings, Inc.
- Applicants: IDAC Holdings, Inc.
- Inventors: Fengjun Xi; Afshin Haghighat; Oghenekome Oteri; Chunxuan Ye; Frank LaSita; Robert Olesen; Moon-Il Lee
- Web page: https://patentgrep.com/patent/US20220286192A1

## CPC

- H04B 7/088: {using beam selection}
- H04B 7/0691: {using subgroups of transmit antennas}
- H04B 7/06952: {Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping}
- H04B 7/0696: {Determining beam pairs}
- H04B 7/0857: {using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]}
- H04B 7/0874: {using subgroups of receive antennas}
- H04B 7/0882: {using post-detection diversity}
- H04B 17/327: Received signal code power [RSCP]
- H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports}
- H04B 7/0452: Multi-user MIMO systems
- 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

A WTRU may include a memory and a processor. The processor may be configured to receive beam grouping information from a gNB or transmission and reception point (TRP). The beam grouping information may indicate a group of beams that the WTRU may report using group-based reporting. The group-based reporting may be a reduced level of reporting compared to a beam-based reporting. The group-based report may include measurement information for a representative beam. The representative beam may be one of the beams in the group or represents an average of the beams in the group. Alternatively, the representative beam may be a beam that has a maximum measurement value compared to other beams in the group. The group-based report may include a reference signal received power (RSRP) for the representative beam and a differential RSRP for each additional beam in the beam group.

## Claims

### Claim at position 1

1-15. (canceled)

### Claim 16

A wireless transmit/receive unit (WTRU), comprising:
a processor and a transceiver which are configured to:
receive a first channel state information reference signal (CSI-RS) configuration message, wherein the CSI-RS configuration message includes information indicating a first group of beams associated with a first level of beam reporting that uses a first cycle,
receive a second CSI-RS configuration message, wherein the second CSI-RS configuration message includes information indicating a second group of beams associated with a second level of beam reporting that uses a second cycle, and wherein the first level of beam reporting differs from the second level of beam reporting,
send a first report in accordance with the first cycle, wherein the first report is based on measurement information associated with the first group, wherein the first report comprises a reference signal received power (RSRP) for a representative beam, and the representative beam is one of the beams in the first group, and
send a second report in accordance with the second cycle, wherein the second report is based on measurement information associated with the second group, wherein the second report comprises a differential RSRP associated with a RSRP for a first beam in the second group and a reference RSRP associated with a second beam in the second group.

### Claim 17 (depends on 16)

The WTRU of claim 16, wherein the reference RSRP associated with the second beam has a largest measurement value compared to RSRPs of the beams in the second group.

### Claim 18 (depends on 16)

The WTRU of claim 16, wherein the RSRP of the representative beam has a largest measurement value compared to RSRPs of the beams in the first group.

### Claim 19 (depends on 16)

The WTRU of claim 16, wherein the processor is further configured to determine the RSRP for the representative beam based on a beam reference signal, wherein the beam reference signal comprises a channel state information reference signal (CSI-RS) or a synchronization signal (SS)/physical broadcast channel (PBCH) block.

### Claim 20 (depends on 16)

The WTRU of claim 16, wherein the first report includes a channel state information (CSI) resource index associated with the representative beam.

### Claim 21 (depends on 16)

The WTRU of claim 16, wherein at least one of: (1) the first CSI-RS configuration message includes information indicating the first cycle, and/or (2) the second CSI-RS configuration message includes information indicating the second cycle.

### Claim 22 (depends on 16)

The WTRU of claim 16, wherein one or more beams in the second group are the same as one or more beams in the first group.

### Claim 23 (depends on 16)

The WTRU of claim 16, wherein the second group of beams are different than the first group of beams.

### Claim 24

A method, comprising:
receiving a first channel state information reference signal (CSI-RS) configuration message, wherein the CSI-RS configuration message includes information indicating a first group of beams associated with a first level of beam reporting that uses a first cycle;
receiving a second CSI-RS configuration message, wherein the second CSI-RS configuration message includes information indicating a second group of beams associated with a second level of beam reporting that uses a second cycle, and wherein the first level of beam reporting differs from the second level of beam reporting;
sending a first report in accordance with the first cycle, wherein the first report is based on measurement information associated with the first group, wherein the first report comprises a reference signal received power (RSRP) for a representative beam, and the representative beam is one of the beams in the first group; and
sending a second report in accordance with the second cycle, wherein the second report is based on measurement information associated with the second group, wherein the second report comprises a differential RSRP associated with a RSRP for a first beam in the second group and a reference RSRP associated with a second beam in the second group.

### Claim 25 (depends on 24)

The method of claim 24, wherein the reference RSRP associated with the second beam has a largest measurement value compared to RSRPs of the beams in the second group.

### Claim 26 (depends on 24)

The method of claim 24, wherein the RSRP of the representative beam has a largest measurement value compared to RSRPs of the beams in the first group.

### Claim 27 (depends on 24)

The method of claim 24, further comprising:
determining the RSRP for the representative beam based on a beam reference signal, wherein the beam reference signal comprises a channel state information reference signal (CSI-RS) or a synchronization signal (SS)/physical broadcast channel (PBCH) block.

### Claim 28 (depends on 24)

The method of claim 24, wherein the first report includes a channel state information (CSI) resource index associated with the representative beam.

### Claim 29 (depends on 24)

The method of claim 24, wherein at least one of: (1) the first CSI-RS configuration message includes information indicating the first cycle, and/or (2) the second CSI-RS configuration message includes information indicating the second cycle.

### Claim 30 (depends on 24)

The method of claim 24, wherein one or more beams in the second group are the same as one or more beams in the first group.

### Claim 31 (depends on 24)

The method of claim 24, wherein the second group of beams are different than the first group of beams.