US 12,245,180 B2
Method and network device for locating clock fault
Yawei Zhang, Beijing (CN); Jingfei Lv, Wuhan (CN); and Yong Cheng, Shenzhen (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on May 27, 2022, as Appl. No. 17/827,189.
Application 17/827,189 is a continuation of application No. PCT/CN2020/132816, filed on Nov. 30, 2020.
Claims priority of application No. 201911206257.1 (CN), filed on Nov. 29, 2019; and application No. 202010023012.1 (CN), filed on Jan. 9, 2020.
Prior Publication US 2022/0286989 A1, Sep. 8, 2022
Int. Cl. H04W 56/00 (2009.01); H04J 3/06 (2006.01); H04L 41/0677 (2022.01)
CPC H04W 56/0035 (2013.01) [H04J 3/0697 (2013.01); H04L 41/0677 (2013.01); H04W 56/001 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method, comprising:
obtaining first frequency offsets between at least two clocks and a local clock;
determining that the local clock is faulty when a first condition is met, wherein the first condition comprises that a first quantity is greater than a second quantity, wherein the first quantity is of first clocks that are in the at least two clocks and that have second frequency offsets relative to the local clock exceeding a frequency offset threshold, and wherein the second quantity is of second clocks that are in the at least two clocks and that have third frequency offsets relative to the local clock not exceeding the frequency offset threshold; and
determining that a third clock in the at least two clocks is faulty when a second condition is met,
wherein the second condition comprises that a fourth frequency offset between the third clock and the local clock exceeds the frequency offset threshold and a fifth frequency offset between the local clock and each fourth clock in the at least two clocks other than the third clock does not exceed the frequency offset threshold.