US 12,235,613 B2
Wireless time servicing method, device, and system
Xiqiang Xu, Beijing (CN); Tianyao Hao, Beijing (CN); and Yaoxing Hu, Beijing (CN)
Assigned to INSTITUTE OF GEOLOGY AND GEOPHYSICS, THE CHINESE ACADEMY OF SCIENCES, Beijing (CN)
Filed by INSTITUTE OF GEOLOGY AND GEOPHYSICS, THE CHINESE ACADEMY OF SCIENCES, Beijing (CN)
Filed on Nov. 18, 2021, as Appl. No. 17/529,295.
Application 17/529,295 is a continuation of application No. PCT/CN2021/077581, filed on Feb. 24, 2021.
Prior Publication US 2022/0269223 A1, Aug. 25, 2022
Int. Cl. G04R 20/14 (2013.01); G04F 5/14 (2006.01); G04R 40/00 (2013.01); H04W 56/00 (2009.01)
CPC G04R 20/14 (2013.01) [G04F 5/14 (2013.01); G04R 40/00 (2013.01); H04W 56/0035 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A wireless time servicing method applied to a master station in a wireless time servicing system, the wireless time servicing method comprising operations of:
obtaining absolute time information sent by an external clock source;
correcting a system time of the master station according to the absolute time information;
broadcasting path information to a slave station;
receiving a feedback from the slave station in response to the path information, calculating a transmission path delay between the master station and the slave station, and storing the transmission path delay in time information; and
sending the time information to the slave station;
wherein the operation of correcting the system time of the master station according to the absolute time information comprises:
performing atomic clock taming using different taming periods depending on an input signal precision of different external clock sources;
wherein the operation of performing atomic clock taming using different taming periods depending on the input signal precision of different external clock sources comprises:
setting the taming period to 5000 seconds when the external clock source is a GPS signal source; or
setting the taming period to 10 seconds when the external clock source is a rubidium clock.