	US 12,267,797 B2
	NR timing advance change detection
Olof Liberg, Enskede (SE); Sandeep Narayanan Kadan Veedu, Täby (SE); and Yi-Ju Chen, Solna (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/998,424
Filed by Telefonaktiebolaget LM Ericsson (PUBL), Stockholm (SE)
PCT Filed May 19, 2021, PCT No. PCT/SE2021/050471 § 371(c)(1), (2) Date Nov. 10, 2022, PCT Pub. No. WO2021/235997, PCT Pub. Date Nov. 25, 2021.
Claims priority of provisional application 63/026,843, filed on May 19, 2020.
Prior Publication US 2023/0189181 A1, Jun. 15, 2023
Int. Cl. H04W 56/00 (2009.01)

CPC H04W 56/0045 (2013.01) [H04W 56/0015 (2013.01)]

16 Claims

1. A method performed by a wireless device, the method comprising:

obtaining a timing advance (TA) value for use with uplink transmissions;

receiving a grant for a radio resource control (RRC) inactive mode uplink transmission;

measuring a reference signal associated with each beam of a plurality of beams at a first time;

selecting a first beam of the plurality of beams based on the measured reference signals at the first time;

storing the measurement associated with the selected first beam;

measuring a reference signal associated with each beam of a plurality of beams at a second time in preparation for the RRC inactive mode uplink transmission;

selecting, based on the measured reference signals at the second time, a second beam of the plurality of beams for which the measuring was performed at the second time; and

when the first selected beam is the same as the second selected beam and the measurement of the reference signal associated with the first selected beam is within a threshold value of the measurement of the reference signal associated with the second selected beam, transmitting the RRC inactive mode uplink transmission using the obtained TA.