US 12,041,569 B2
Time synchronization accuracy enhancements
Debdeep Chatterjee, San Jose, CA (US); Sergey Panteleev, Nizhny Novgorod (RU); Fatemeh Hamidi-Sepehr, Santa Clara, CA (US); and Toufiqul Islam, Sunnyvale, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/286,578
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Nov. 1, 2019, PCT No. PCT/US2019/059528
§ 371(c)(1), (2) Date Apr. 19, 2021,
PCT Pub. No. WO2020/093000, PCT Pub. Date May 7, 2020.
Claims priority of provisional application 62/755,349, filed on Nov. 2, 2018.
Prior Publication US 2021/0345272 A1, Nov. 4, 2021
Int. Cl. H04W 56/00 (2009.01); H04W 80/02 (2009.01); H04W 92/10 (2009.01)
CPC H04W 56/005 (2013.01) [H04W 56/0015 (2013.01); H04W 80/02 (2013.01); H04W 92/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A baseband processor for a User Equipment (UE), configured to:
decode a unicast message from a base station received through a radio interface, the unicast message including reference time information and an indication that the reference time information corresponds to a pre-compensated reference time that has been pre-compensated, prior to reception of the unicast message from the base station, for propagation delay between a receiver of the UE and a transmitter of the base station;
in response to the indication, determine a reference time from the reference time information without applying compensation for propagation delay thereto; and
cause the UE to communicate with the base station based on the reference time.