US 11,750,330 B2
Radio link monitoring for sidelink communications
Shuanshuan Wu, San Diego, CA (US); Sudhir Kumar Baghel, Hillsborough, NJ (US); and Gabi Sarkis, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Aug. 14, 2020, as Appl. No. 16/994,116.
Claims priority of provisional application 62/893,680, filed on Aug. 29, 2019.
Prior Publication US 2021/0067277 A1, Mar. 4, 2021
Int. Cl. H04L 1/1812 (2023.01); H04W 24/08 (2009.01)
CPC H04L 1/1812 (2013.01) [H04W 24/08 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for wireless communications at a first user equipment (UE), comprising:
receiving signaling indicating a threshold quantity of unsuccessfully received feedback messages that is associated with a radio link monitoring procedure for a sidelink communications link;
transmitting, to a second UE, a first message in a first transmission time interval via the sidelink communications link;
monitoring the sidelink communications link during a second transmission time interval subsequent to the first transmission time interval for a feedback message from the second UE in response to the first message transmitted by the first UE, wherein the monitoring is part of the radio link monitoring procedure for the sidelink communications link;
incrementing, as part of the radio link monitoring procedure, a counter based at least in part on an unsuccessful receipt of the feedback message in the second transmission time interval;
monitoring, based at least in part on incrementing the counter, whether the sidelink communications link corresponds to a radio link failure based at least in part on whether the counter exceeds the threshold quantity;
receiving a hybrid automatic repeat request (HARQ) feedback message comprising a negative acknowledgement prior to the counter exceeding the threshold quantity of unsuccessfully received feedback messages; and
resetting the counter based at least in part on the HARQ feedback message comprising the negative acknowledgement.