US 12,335,881 B2
Power-efficient sidelink synchronization signal transmission
Gokul Sridharan, Sunnyvale, CA (US); Huilin Xu, San Diego, CA (US); Seyedkianoush Hosseini, San Diego, CA (US); Karthika Paladugu, San Diego, CA (US); Wei Yang, San Diego, CA (US); Peter Pui Lok Ang, San Diego, CA (US); Sudhir Kumar Baghel, Hillsborough, NJ (US); Krishna Kiran Mukkavilli, San Diego, CA (US); and Tingfang Ji, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jan. 20, 2021, as Appl. No. 17/248,335.
Claims priority of provisional application 62/963,957, filed on Jan. 21, 2020.
Prior Publication US 2021/0227480 A1, Jul. 22, 2021
Int. Cl. H04W 56/00 (2009.01)
CPC H04W 56/001 (2013.01) 30 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a user equipment (UE), comprising:
detecting an out-of-coverage scenario based at least in part on determining that a synchronization source associated with a wireless network is unavailable or has a signal strength that fails to satisfy a threshold; and
transmitting, on a sidelink channel, a sidelink synchronization signal in a transmission period that includes a plurality of periodic synchronization signal occasions based at least in part on the out-of-coverage scenario, wherein the sidelink synchronization signal is transmitted according to a reduced duty cycle that causes the sidelink synchronization signal to be transmitted only during an on duration of the transmission period, wherein the on duration comprises of the plurality of periodic synchronization signal occasions, wherein the subset comprises two or more periodic synchronization signal occasions and the subset of the plurality of periodic synchronization signal occasions are periodic within the on duration.