US 11,871,346 B2
Wake up signal for cellular communication in unlicensed spectrum
Wei Zeng, San Diego, CA (US); Dawei Zhang, Saratoga, CA (US); Haitong Sun, Irvine, CA (US); Wei Zhang, Santa Clara, CA (US); Tianyan Pu, Cupertino, CA (US); Yuchul Kim, Santa Clara, CA (US); Yuqin Chen, Shenzhen (CN); Farouk Belghoul, Campbell, CA (US); Haijing Hu, Beijing (CN); Fangli Xu, Beijing (CN); and Sami M. Almalfouh, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 16/480,784
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Aug. 10, 2018, PCT No. PCT/CN2018/099958
§ 371(c)(1), (2) Date Jul. 25, 2019,
PCT Pub. No. WO2020/029249, PCT Pub. Date Feb. 13, 2020.
Prior Publication US 2021/0352582 A1, Nov. 11, 2021
Int. Cl. H04W 52/02 (2009.01); H04W 72/0446 (2023.01); H04W 74/08 (2009.01); H04W 74/00 (2009.01)
CPC H04W 52/0229 (2013.01) [H04W 72/0446 (2013.01); H04W 74/006 (2013.01); H04W 74/0816 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
one or more processors configured to cause a wireless device to:
establish a cellular link with a cellular base station, wherein the cellular base station provides a cell that is deployed on an unlicensed frequency channel;
monitor the unlicensed frequency channel for a wake up signal, wherein the wake up signal is provided in a plurality of narrowband transmissions at different frequency locations within the unlicensed frequency channel; and
determine whether to monitor the unlicensed frequency channel for control channel signaling for at least a first slot or mini-slot of the cell that is deployed on the unlicensed frequency channel based at least in part on whether a wake up signal is detected.