US Patent No. 10,893,523


Patent No. 10,893,523
Issue Date January 12, 2021
Title Wireless Communication Between Wideband Enb And Narrowband Ue
Inventorship Srinivas Yerramalli, San Diego, CA (US)
Tamer Kadous, San Diego, CA (US)
Chih-Hao Liu, San Diego, CA (US)
Chirag Patel, San Diego, CA (US)
Alberto Rico Alvarino, San Diego, CA (US)
Assignee QUALCOMM Incorporated, San Diego, CA (US)

Claim of US Patent No. 10,893,523

1. A method of wireless communication at a base station, comprising:performing a dual clear channel assessment (CCA) procedure for a frame prior to transmitting a transmission, wherein the dual CCA procedure comprises CCA followed by a first extended CCA (eCCA) when the CCA is unsuccessful;
transmitting the transmission during the frame when at least one CCA procedure of the dual CCA procedure is successful;
refraining from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful; and
when the CCA and the first eCCA of the dual CCA procedure are unsuccessful:
waiting until a next CCA location at a next frame boundary following the frame in which the CCA and the first eCCA are performed; and
performing a second eCCA at the next CCA location prior to transmitting the transmission, wherein the second eCCA comprises a next eCCA following the dual CCA procedure and is performed at the next CCA location without performing a new CCA at the next CCA location.