US 12,445,983 B2
Time calibration method and related apparatus
Le Niu, Nanjing (CN); Zixiang Ma, Nanjing (CN); Shuaishuai Zhang, Nanjing (CN); and Chun Pan, Nanjing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Oct. 11, 2022, as Appl. No. 17/963,348.
Claims priority of application No. 202111180893.9 (CN), filed on Oct. 11, 2021; and application No. 202111463298.6 (CN), filed on Dec. 2, 2021.
Prior Publication US 2023/0111449 A1, Apr. 13, 2023
Int. Cl. H04W 56/00 (2009.01); H04W 84/12 (2009.01)
CPC H04W 56/001 (2013.01) [H04W 84/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method implemented by a first station for obtaining a clock offset between a first clock of the first station and a second clock of a second station, the method comprising:
receiving a first frame from the second station without establishing a fine timing measurement (FTM) session between the first station and the second station, wherein the first frame comprises a first sequence number;
storing the first sequence number and a receiving moment of the first frame;
receiving a second frame from the second station, wherein the second frame comprises a second sequence number and a sending moment at which the second station sends the first frame;
retrieving the receiving moment based on the second sequence number; and
obtaining a clock offset between a first clock of the first station and a second clock of the second station based on the receiving moment and the sending moment.