US 11,963,220 B2
Channel access mechanisms in wireless communication
Hong He, Cupertino, CA (US); Dawei Zhang, Saratoga, CA (US); Wei Zeng, San Diego, CA (US); Chunhai Yao, Beijing (CN); Haitong Sun, Irvine, CA (US); Yuchul Kim, Santa Clara, CA (US); Yushu Zhang, Beijing (CN); Yang Tang, Cupertino, CA (US); Weidong Yang, San Diego, CA (US); Jie Cui, San Jose, CA (US); Oghenekome Oteri, San Diego, CA (US); Chunxuan Ye, San Diego, CA (US); and Wei Zhang, Santa Clara, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/053,718
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Nov. 7, 2019, PCT No. PCT/CN2019/116264
§ 371(c)(1), (2) Date Nov. 6, 2020,
PCT Pub. No. WO2021/087866, PCT Pub. Date May 14, 2021.
Prior Publication US 2022/0279579 A1, Sep. 1, 2022
Int. Cl. H04W 74/08 (2009.01); H04L 27/26 (2006.01); H04W 72/0446 (2023.01); H04W 74/00 (2009.01); H04W 74/0816 (2024.01)
CPC H04W 74/0816 (2013.01) [H04L 27/2607 (2013.01); H04W 72/0446 (2013.01); H04W 74/006 (2013.01); H04W 74/0866 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A wireless communication device, comprising:
a memory storing software instructions;
processor circuitry configured to implement the software instructions to cause the wireless communication device to:
receive, from a base station, a downlink control information (DCI) message including an indication of a first listen-before-talk (LBT) category and an indication of cyclic prefix information;
receive, from the base station, a second message indicating timing information for a channel occupancy time (COT) initiated by the base station after receiving the DCI message;
perform an LBT procedure based on an LBT category other than the first LBT category in response to determining, based on the timing information, that the particular time is within the COT;
perform an LBT procedure based on the first LBT category in response to determining, based on the timing information, that a particular time granted for uplink transmission is not within the COT; and
in response to successful completion of the LBT procedure, transmit a message having a cyclic prefix based on the cyclic prefix information.