US 11,991,748 B2
Methods and system for LBT threshold setting for directional reception and transmission
Jiayin Zhang, Kanata (CA); Lei Huang, Shanghai (CN); Yingpei Lin, Shanghai (CN); and Yan Xin, Ottawa (CA)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Dec. 29, 2021, as Appl. No. 17/565,100.
Application 17/565,100 is a continuation of application No. 15/882,439, filed on Jan. 29, 2018, granted, now 11,277,865.
Claims priority of provisional application 62/512,547, filed on May 30, 2017.
Prior Publication US 2022/0124810 A1, Apr. 21, 2022
Int. Cl. H04W 74/08 (2009.01); H04B 7/08 (2006.01); H04W 16/14 (2009.01); H04W 16/28 (2009.01); H04W 74/0816 (2024.01)
CPC H04W 74/0816 (2013.01) [H04B 7/08 (2013.01); H04W 16/14 (2013.01); H04B 7/086 (2013.01); H04W 16/28 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method in a wireless device for determining if a channel is clear in an unlicensed band channel in a wireless network, comprising:
determining, by the wireless device, an energy detection threshold according to a maximum equivalent isotropically radiated power (EIRP) among EIRPs of one or more transmissions following a first time interval including at least one clear channel assessment (CCA) time interval, wherein an EIRP of the EIRPs is equal to a sum of antenna gain and transmit power of one of the one or more transmissions;
detecting, by the wireless device, energy along a first beamforming direction by detecting a plurality of energies each corresponding to one of a plurality of receiving directions in parallel, wherein the first beamforming direction includes the plurality of receiving directions; and
determining, by the wireless device, whether the unlicensed band channel is clear in at least the first beamforming direction according to the energy detected along the first beamforming direction and the energy detection threshold.