# US 12,004,142 B2 · Uplink timing associated with uplink transmission configuration indication (TCI) state

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- Number: US 12,004,142 B2
- Document ID: US12004142B2
- Status: Granted
- Kind: B2
- Application number: 17/189,049
- Filed: 2021-03-01
- Published: 2021-09-30
- Granted: 2024-06-04
- Earliest claimed: 2020-03-30
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Kiran Venugopal; Wooseok Nam; Tao Luo; Junyi Li
- Web page: https://patentgrep.com/patent/US12004142B2

## CPC

- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W 72/046: {the resource being in the space domain, e.g. beams}
- H04B 7/06968: {using quasi-colocation [QCL] between signals}
- H04W 56/0045: {compensating for timing error by altering transmission time}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 72/56: based on priority criteria
- H04B 7/088: {using beam selection}
- H04L 5/0057: {Physical resource allocation for CQI}
- 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)
- H04B: TRANSMISSION

## Abstract

A method of wireless communication by a UE (user equipment) includes setting a timing parameter based on an uplink TCI (transmission configuration indication) state. The method also includes adjusting uplink transmit timing for an uplink transmission based on the timing parameter.

## Claims

### Claim 1

A method of wireless communication by a UE (user equipment), comprising:
setting a timing advance parameter for a timing advance group (TAG) of the UE based on a quasi-collocated (QCL) source reference signal (RS) indicated by an uplink TCI (transmission configuration indication) state, the QCL source RS from a configured resource set; and
adjusting uplink transmit timing for an uplink transmission based on the timing advance parameter for the TAG of the UE, the timing advance parameter being based on the QCL source RS indicated by the uplink TCI state.

### Claim 2 (depends on 1)

The method of claim 1, in which the QCL source reference signal comprises an SRS (sounding reference signal) of a configured SRS resource set, and in which setting the timing advance parameter comprises setting the timing advance parameter to match a timing advance of the SRS resource set.

### Claim 3 (depends on 1)

The method of claim 1, in which setting the timing advance parameter comprises setting the timing advance parameter by calculating a beam specific timing advance, in which the QCL source reference signal comprises a downlink reference signal including a TRS (tracking reference signal), SSB (synchronization signal block) or a CSI-RS (channel state information reference signal).

### Claim 4 (depends on 1)

The method of claim 1, further comprising adjusting uplink transmit timing for a plurality of uplink beams, each uplink beam having its own uplink TCI state.

### Claim 5 (depends on 1)

The method of claim 1, further comprising indicating a maximum number of sub-timing advance groups (TAGs) supported by the UE.

### Claim 6 (depends on 1)

The method of claim 1, further comprising receiving an indication of a number of sub-timing advance groups (TAGs) to support.

### Claim 7 (depends on 1)

The method of claim 1, in which a timing advance command includes at least one sub-timing advance group (TAG) index, each sub-TAG comprising at least one uplink TCI state.

### Claim 8 (depends on 1)

The method of claim 1, in which a media access control-control element (MAC-CE) comprises a plurality of sub-timing advance group (TAG) updates.

### Claim 9 (depends on 1)

The method of claim 1, further comprising:
receiving an indication of a timing reference RS (reference signal);
deriving a timing estimate for the timing reference RS; and
adjusting the timing advance parameter based on the timing estimate.

### Claim 10 (depends on 1)

The method of claim 1, further comprising adjusting the timing based on a time tracking loop or channel power delay profile estimate of a TRS (tracking reference signal) spatially quasi-located with a source downlink RS quasi-located with the uplink transmission.

### Claim 11 (depends on 1)

The method of claim 1, further comprising calculating the timing adjustment from a timing estimate of at least one downlink reference signal when the source reference signal is not a tracking reference signal, or the source reference signal is a SRS (sounding reference signal) spatially quasi-located with the uplink transmission and the SRS is not configured with spatial relationship information.

### Claim 12 (depends on 11)

The method of claim 11, in which the calculating is based on a smallest value from timing estimates of a plurality of downlink reference signals or an average of timing estimates of the plurality of downlink reference signals.

### Claim 13 (depends on 1)

The method of claim 1, further comprising adjusting uplink timing for a physical uplink shared channel (PUSCH) based on a parameter different from a parameter for adjusting a timing for a physical uplink control channel (PUCCH), in which a TCI state for the PUCCH differs from a TCI state for the PUSCH.

### Claim 14 (depends on 1)

The method of claim 1, further comprising continuing to apply the adjusted uplink transmit timing for a period of time after switching bandwidth parts (BWPs).

### Claim 15 (depends on 1)

The method of claim 1, in which a timing offset is less than a threshold, the method further comprising adjusting the timing advance parameter in accordance with the timing offset and a transmission mode, the timing offset being between a high priority grant free transmission and a low priority transmission.

### Claim 16 (depends on 1)

The method of claim 1, further comprising:
setting the timing advance parameter by measuring the source reference signal indicated by the uplink TCI state; and
the adjusting further comprises adjusting all uplink beams with a single timing adjustment based on the measuring of the source reference signal.

### Claim 17

An apparatus of a UE (user equipment) for wireless communication, comprising:
memory, and
at least one processor operatively coupled to the memory, the memory and the at least one processor configured:
to set a timing advance parameter for a timing advance group (TAG) of the UE based on a quasi-collocated (QCL) source reference signal (RS) indicated by an uplink TCI (transmission configuration indication) state, the QCL source RS from a configured resource set; and
to adjust uplink transmit timing for an uplink transmission based on the timing advance parameter for the TAG of the UE, the timing advance parameter being based on the QCL source RS indicated by the uplink TCI state.

### Claim 18 (depends on 17)

The apparatus of claim 17, in which the QCL source reference signal comprises an SRS (sounding reference signal) of a configured SRS resource set, and in which the at least one processor is further configured to set the timing advance parameter by setting the timing advance parameter to match a timing advance of the SRS resource set.

### Claim 19 (depends on 17)

The apparatus of claim 17, in which the at least one processor is further configured to set the timing advance parameter by calculating a beam specific timing advance, in which the QCL source reference signal comprises a downlink reference signal including a TRS (tracking reference signal), SSB (synchronization signal block) or a CSI-RS (channel state information reference signal).

### Claim 20 (depends on 17)

The apparatus of claim 17, in which the at least one processor is further configured to adjust uplink transmit timing for a plurality of uplink beams, each uplink beam having its own uplink TCI state.

### Claim 21 (depends on 17)

The apparatus of claim 17, in which the at least one processor is further configured to indicate a maximum number of sub-timing advance groups (TAGs) supported by the UE.

### Claim 22 (depends on 17)

The apparatus of claim 17, in which the at least one processor is further configured:
to set the timing advance parameter by measuring the source reference signal indicated by the uplink TCI state; and
to adjust by adjusting all uplink beams with a single timing adjustment based on the measuring of the source reference signal.

### Claim 23

An apparatus of a base station for wireless communication, comprising:
memory, and
at least one processor operatively coupled to the memory, the memory and the at least one processor configured:
to set a timing advance parameter for a timing advance group (TAG) of a user equipment (UE) based on a quasi-collocated (QCL) source reference signal (RS) indicated by an uplink TCI (transmission configuration indication) state, the QCL source RS from a configured resource set; and
to adjust uplink transmit timing for an uplink transmission based on the timing advance parameter for the TAG of the UE, the timing advance parameter being based on the QCL source RS indicated by the uplink TCI state.

### Claim 24 (depends on 23)

The apparatus of claim 23, in which the at least one processor is configured to receive an indication, from the UE, of a maximum number of sub-timing advance groups (TAGs) supported by the UE, prior to setting the timing advance parameter.

### Claim 25 (depends on 23)

The apparatus of claim 23, in which the at least one processor is configured to transmit an indication of a number of sub-timing advance groups (TAGs) to support.

### Claim 26 (depends on 23)

The apparatus of claim 23, in which the at least one processor is configured to transmit a timing advance command including at least one sub-timing advance group (TAG) index, each sub-TAG comprising at least one uplink TCI state.

### Claim 27 (depends on 23)

The apparatus of claim 23, in which the at least one processor is configured to transmit a media access control-control element (MAC-CE) comprising a plurality of sub-timing advance group (TAG) updates.

### Claim 28

A UE (user equipment) for wireless communication, comprising:
means for setting a timing advance parameter for a timing advance group (TAG) of the UE based on a quasi-collocated (QCL) source reference signal (RS) indicated by an uplink TCI (transmission configuration indication) state, the QCL source RS from a configured resource set; and
means for adjusting uplink transmit timing for an uplink transmission based on the timing advance parameter for the TAG of the UE, the timing advance parameter being based on the QCL source RS indicated by the uplink TCI state.