US 11,729,825 B2
Channel access enhancement for new radio-unlicensed
Chih-Hao Liu, San Diego, CA (US); Yisheng Xue, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); and Jing Sun, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 28, 2020, as Appl. No. 17/83,222.
Claims priority of provisional application 62/927,542, filed on Oct. 29, 2019.
Prior Publication US 2021/0127421 A1, Apr. 29, 2021
Int. Cl. H04W 74/08 (2009.01); H04W 72/20 (2023.01); H04W 72/23 (2023.01)
CPC H04W 74/0808 (2013.01) [H04W 72/20 (2023.01); H04W 72/23 (2023.01); H04W 74/0833 (2013.01)] 80 Claims
OG exemplary drawing
 
1. A method of wireless communication, comprising:
performing, by a user equipment (UE), an extended clear channel assessment (eCCA) for a random eCCA duration on one or more listen before talk (LBT) subbands of a system bandwidth defined within a shared communication spectrum, wherein performing the eCCA for the random eCCA duration on the one or more LBT subbands includes adjusting, by the UE, an upper bound of a range from which the random eCCA duration is selected, the adjusting based on a change to a bandwidth of the one or more LBT subbands; and
transmitting, by the UE, uplink transmissions on one or more uplink occasions scheduled within a channel occupancy time (COT) of at least one LBT subband of the one or more LBT subbands, wherein the transmitting is in response to success of the eCCA in the at least one LBT subband.