# US 11,115,110 B2 · Default beam selection based on a subset of coresets

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,115,110 B2
- Document ID: US11115110B2
- Status: Granted
- Kind: B2
- Application number: 16/662,766
- Filed: 2019-10-24
- Published: 2020-06-18
- Granted: 2021-09-07
- Earliest claimed: 2018-12-14
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Yan Zhou; Tao Luo; Wooseok Nam; Makesh Pravin John Wilson; Srinivas Yerramalli; Xiaoxia Zhang; Jing Sun; Arumugam Chendamarai Kannan
- Web page: https://patentgrep.com/patent/US11115110B2

## CPC

- H04B 7/088: {using beam selection}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04B 7/06968: {using quasi-colocation [QCL] between signals}
- H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals}
- H04W 72/046: {the resource being in the space domain, e.g. beams}
- H04W 72/12: Wireless traffic scheduling
- H04W 74/0816: with collision avoidance
- H04L 5/0023: {Time-frequency-space}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/1273: of downlink data flows
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

In order to overcome problems that a UE may face in determining a default beam for communication with the base station during a COT, a method, apparatus, and computer-readable medium are provided for a base station to indicate to the UE which CORESET(s), QCL assumptions, UL resources, and/or spatial relationships are selected for a COT. A UE receives, from a base station, an indication corresponding to a COT. The indication is for at least one of a set of CORESETs, a set of QCL assumptions, a set of UL resources, or a set of spatial relations for determining a default beam. The UE determines the default beam from the base station for use during the COT based on the indication. The UE transmits or receives a transmission using the default beam.

## Claims

### Claim 1

A method of wireless communication at a User Equipment (UE), comprising:
receiving, from a base station, an indication corresponding to a Channel Occupancy Time (COT), wherein the indication is for at least one of a set of Control Resource Sets (CORESETs), a set of Quasi co-location (QCL) assumptions, a set of uplink resources, or a set of spatial relations for determining a default beam;
determining the default beam from the base station for use during the COT based on the indication; and
transmitting or receiving a transmission using the default beam.

### Claim 2 (depends on 1)

The method of claim 1, wherein the default beam comprises a default reception beam that is selected based on a lowest CORESET identifier (ID) from among the set of CORESETs or the set of QCL assumptions.

### Claim 3 (depends on 1)

The method of claim 1, wherein for a CORESET that is not comprised in the set of CORESETs, the UE determines the default beam based on a lowest CORESET identifier (ID) from among the set of CORESETs or the set of QCL assumptions.

### Claim 4 (depends on 1)

The method of claim 1, wherein the default beam comprises a default transmission beam that is selected based on the indication of the set of uplink resources or the set of spatial relations for determining the default beam.

### Claim 5 (depends on 4)

The method of claim 4, wherein the set of uplink resources correspond to at least one of a Sounding Reference Signal (SRS), an uplink control channel, or an uplink data channel.

### Claim 6 (depends on 4)

The method of claim 4, wherein the set of spatial relations for determining the default beam comprise spatial relations for selecting at least one of a Sounding Reference Signal (SRS), an uplink control channel, or an uplink data channel for an uplink transmission from the UE.

### Claim 7 (depends on 4)

The method of claim 4, wherein the indication comprises uplink resources for a first uplink channel, and wherein the UE determines the default beam for a second uplink channel based on a beam used for the first uplink channel.

### Claim 8

An apparatus for wireless communication at a User Equipment (UE), comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive, from a base station, an indication corresponding to a Channel Occupancy Time (COT), wherein the indication is for at least one of a set of Control Resource Sets (CORESETs), a set of Quasi co-location (QCL) assumptions, a set of uplink resources, or a set of spatial relations for determining a default beam;
determine the default beam from the base station for use during the COT based on the indication; and
transmit or receive a transmission using the default beam.

### Claim 9 (depends on 8)

The apparatus of claim 8, wherein the default beam comprises a default reception beam that is selected based on a lowest CORESET identifier (ID) from among the set of CORESETs or the set of QCL assumptions.

### Claim 10 (depends on 8)

The apparatus of claim 8, wherein for a CORESET that is not comprised in the set of CORESETs, the UE determines the default beam based on a lowest CORESET identifier (ID) from among the set of CORESETs or the set of QCL assumptions.

### Claim 11 (depends on 8)

The apparatus of claim 8, wherein the default beam comprises a default transmission beam that is selected based on the indication of the set of uplink resources or the set of spatial relations for determining the default beam.

### Claim 12 (depends on 11)

The apparatus of claim 11, wherein the set of uplink resources correspond to at least one of a Sounding Reference Signal (SRS), an uplink control channel, or an uplink data channel.

### Claim 13 (depends on 11)

The apparatus of claim 11, wherein the set of spatial relations for determining the default beam comprise spatial relations for selecting at least one of a Sounding Reference Signal (SRS), an uplink control channel, or an uplink data channel for an uplink transmission from the UE.

### Claim 14 (depends on 11)

The apparatus of claim 11, wherein the indication comprises uplink resources for a first uplink channel, and wherein the UE determines the default beam for a second uplink channel based on a beam used for the first uplink channel.

### Claim 15

A method of wireless communication at a base station, comprising:
sending, to a UE, an indication of at least one of a set of Control Resource Sets (CORESETs), a set of Quasi co-location (QCL) assumptions, a set of uplink resources, or a set of spatial relations for determining a default beam, the indication being for use in determining the default beam for use in a Channel Occupancy Time (COT); and
transmitting or receiving a transmission based on the default beam.

### Claim 16 (depends on 15)

The method of claim 15, wherein the indication indicates the set of CORESETs, and wherein the default beam is a default reception beam.

### Claim 17 (depends on 15)

The method of claim 15, wherein the indication indicates the set of QCL assumptions, and wherein the default beam is a default reception beam.

### Claim 18 (depends on 15)

The method of claim 15, wherein the indication indicates the set of uplink resources, and wherein the default beam comprises a default transmission beam.

### Claim 19 (depends on 18)

The method of claim 18, wherein the set of uplink resources comprise at least one of a Sounding Reference Signal (SRS), an uplink control channel, or an uplink data channel.

### Claim 20 (depends on 15)

The method of claim 15, wherein the indication indicates the set of spatial relations for determining the default beam, and wherein the default beam comprises a default transmission beam.

### Claim 21 (depends on 20)

The method of claim 20, wherein the set of spatial relations for determining the default beam comprise spatial relations for selecting at least one of a Sounding Reference Signal (SRS), an uplink control channel, or an uplink data channel.

### Claim 22 (depends on 15)

The method of claim 15, wherein the indication comprises uplink resources for a first uplink channel, and wherein the default beam for a second uplink channel is indicated based on a beam used for the first uplink channel.

### Claim 23

An apparatus for wireless communication at a base station, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
send, to a User Equipment (UE), an indication of at least one of a set of Control Resource Sets (CORESETs), a set of Quasi co-location (QCL) assumptions, a set of uplink resources, or a set of spatial relations for determining a default beam, the indication being for use in determining the default beam for use in a Channel Occupancy Time (COT); and
transmit or receive a transmission based on the default beam.

### Claim 24 (depends on 23)

The apparatus of claim 23, wherein the indication indicates the set of CORESETs, and wherein the default beam is a default reception beam.

### Claim 25 (depends on 23)

The apparatus of claim 23, wherein the indication indicates the set of QCL assumptions, and wherein the default beam is a default reception beam.

### Claim 26 (depends on 23)

The apparatus of claim 23, wherein the indication indicates the set of uplink resources, and wherein the default beam comprises a default transmission beam.

### Claim 27 (depends on 26)

The apparatus of claim 26, wherein the set of uplink resources comprise at least one of a Sounding Reference Signal (SRS), an uplink control channel, or an uplink data channel.

### Claim 28 (depends on 23)

The apparatus of claim 23, wherein the indication indicates the set of spatial relations for determining the default beam, and wherein the default beam comprises a default transmission beam.

### Claim 29 (depends on 28)

The apparatus of claim 28, wherein the set of spatial relations for determining the default beam comprise spatial relations for selecting at least one of a Sounding Reference Signal (SRS), an uplink control channel, or an uplink data channel.

### Claim 30 (depends on 23)

The apparatus of claim 23, wherein the indication comprises uplink resources for a first uplink channel, and wherein the default beam for a second uplink channel is indicated based on a beam used for the first uplink channel.