US 11,924,902 B2
Directional sidelink (SL) beam failure detection
Jung Ho Ryu, Fort Lee, NJ (US); Sony Akkarakaran, Poway, CA (US); Tao Luo, San Diego, CA (US); Jelena Damnjanovic, Del Mar, CA (US); Junyi Li, Fairless Hills, PA (US); Ling Ding, Chester, NJ (US); Juan Montojo, San Diego, CA (US); and Xiaoxia Zhang, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 1, 2021, as Appl. No. 17/336,118.
Claims priority of provisional application 63/047,816, filed on Jul. 2, 2020.
Prior Publication US 2022/0007448 A1, Jan. 6, 2022
Int. Cl. H04W 76/18 (2018.01); H04L 5/00 (2006.01); H04W 24/04 (2009.01)
CPC H04W 76/18 (2018.02) [H04L 5/0048 (2013.01); H04W 24/04 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of wireless communication by a first sidelink user equipment (UE), comprising:
periodically receiving a first set of sidelink beam failure detection (BFD) reference signals (RSs) from a second sidelink UE, the first set comprising a plurality of reference signals;
incrementing a beam failure detection counter in response to all of the reference signals of the first set of sidelink beam failure detection reference signals having a received signal strength below a threshold;
starting a beam failure detection timer in response to the first set of sidelink beam failure detection reference signals having the received signal strength below the threshold;
declaring a beam failure before the beam failure detection counter reaches a maximum beam failure detection counter value, prior to transmitting a second set of sidelink beam failure detection reference signals, in response to transitioning to a transmitting role to transmit the second set of sidelink beam failure detection reference signals (RSs).