US 12,069,625 B2
Preamble transmission in sidelink communications using shared radio frequency spectrum
Xiaoxia Zhang, San Diego, CA (US); Jing Sun, San Diego, CA (US); Arthur Gubeskys, San Diego, CA (US); Shailesh Patil, San Diego, CA (US); and Tao Luo, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Aug. 11, 2021, as Appl. No. 17/399,819.
Claims priority of provisional application 63/077,478, filed on Sep. 11, 2020.
Prior Publication US 2022/0086830 A1, Mar. 17, 2022
Int. Cl. H04W 72/04 (2023.01); H04W 16/14 (2009.01); H04W 72/0446 (2023.01)
CPC H04W 72/0446 (2013.01) [H04W 16/14 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method for wireless communication at a user equipment (UE), comprising:
identifying a first symbol of a sidelink communications frame of a first radio access technology that uses a shared radio frequency spectrum band for sidelink communications between UEs;
determining a start time for a channel reservation preamble associated with a second radio access technology relative to the first symbol, wherein a duration of the channel reservation preamble is longer than a symbol duration of the first symbol of the sidelink communications frame, the duration of the channel reservation preamble being based at least in part on a subcarrier spacing used for the sidelink communications; and
transmitting the channel reservation preamble based at least in part on the determined start time.