US 12,445,960 B2
Discontinuous reception in sidelink communication based on a direct frame number
Gabi Sarkis, San Diego, CA (US); Seyedkianoush Hosseini, San Diego, CA (US); and Qing Li, Princeton Junction, NJ (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jan. 10, 2022, as Appl. No. 17/572,128.
Claims priority of provisional application 63/173,912, filed on Apr. 12, 2021.
Prior Publication US 2022/0330147 A1, Oct. 13, 2022
Int. Cl. H04W 52/02 (2009.01); H04L 5/00 (2006.01); H04W 56/00 (2009.01); H04W 88/06 (2009.01)
CPC H04W 52/0216 (2013.01) [H04L 5/0048 (2013.01); H04W 56/001 (2013.01); H04W 88/06 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A user equipment (UE) for wireless communication, comprising at least one memory, and one or more processors coupled to the at least one memory, wherein the one or more processors are configured to cause the UE to:
receive a direct frame number (DFN) indicator from a base station, wherein the DFN indicator comprises at least one of an offset value indicative of a difference between timing of DEN and a system frame number (SFN) timing, or a global navigation satellite system (GNSS) time;
determine a DFN timing based on the DEN indicator received from the base station;
configure a sidelink discontinuous reception (DRX) mode using one or more sidelink DRX parameters based on the DFN timing;
receive, from a base station, a GNSS synchronization indicator indicating whether the base station is synchronized to the GNSS time; and
perform a sidelink communication with a second UE during an on-duration of a sidelink DRX cycle in the sidelink DRX mode according to the one or more sidelink DRX parameters, wherein the sidelink communication is performed based on the GNSS synchronization indicator,
wherein the one or more processors are further configured to cause the UE to:
refrain, if the GNSS synchronization indicator indicates that the base station is not synchronized to the GNSS time, refrain from transmitting the sidelink communication to the second UE during at least one of a portion of a first frame corresponding to a first DFN based on the DFN timing or a portion of a last frame corresponding to a last DFN based on the DFN timing; and
utilize, if the GNSS synchronization indicator indicates that the base station is synchronized to the GNSS time, at least one of the first frame or the last frame to perform the sidelink communication with the second UE.