US 12,289,606 B2
Wireless device initiated channel occupancy in unlicensed spectrum
Sigen Ye, Whitehouse Station, NJ (US); Oghenekome Oteri, San Diego, CA (US); Weidong Yang, San Diego, CA (US); Wei Zeng, San Diego, CA (US); Hong He, Cupertino, CA (US); Yushu Zhang, Beijing (CN); Haitong Sun, Irvine, CA (US); Huaning Niu, San Jose, CA (US); Chunhai Yao, Beijing (CN); and Dawei Zhang, Saratoga, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/437,909
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Oct. 15, 2020, PCT No. PCT/CN2020/121123
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2022/077331, PCT Pub. Date Apr. 21, 2022.
Prior Publication US 2022/0303781 A1, Sep. 22, 2022
Int. Cl. H04W 16/14 (2009.01); H04W 74/0808 (2024.01); H04W 76/10 (2018.01)
CPC H04W 16/14 (2013.01) [H04W 74/0808 (2013.01); H04W 76/10 (2018.02)] 13 Claims
OG exemplary drawing
 
1. A baseband processor configured to perform operations comprising:
determining to perform an uplink transmission to a cellular base station on an unlicensed frequency channel;
determining that the cellular base station has initiated a first channel occupancy of the unlicensed frequency channel;
determining a length of the uplink transmission; and
determining whether to initiate channel occupancy of the unlicensed frequency channel or use the first channel occupancy, comprising:
determining to initiate a new channel occupancy of the unlicensed frequency channel if the length of the uplink transmission would overlap a first idle period at an end of a current first fixed frame period of the cellular base station;
determining to use the first channel occupancy of the unlicensed frequency channel if the length of the uplink transmission would not overlap the first idle period at the end of the current first fixed frame period of the cellular base station; and
performing the uplink transmission to the cellular base station on the unlicensed frequency channel,
wherein the uplink transmission extends at least into a clear channel assessment period for a next fixed frame period of the cellular base station based at least in part on the new channel occupancy being initiated while the cellular base station has already initiated channel occupancy of the unlicensed frequency channel.