Patent ID: 11860689
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 6:
7. A service board, comprising:
a central processing unit (CPU); and
a clock board;
wherein the clock board is configured to synchronize clock board times between service boards; and
wherein the CPU is configured to:
after the clock board times are synchronized, obtain a CPU time and a clock board time of the service board according to a preset periodicity, wherein the CPU time is based on a clock signal generated by a crystal oscillator corresponding to the CPU of the service board, and the clock board time is based on a clock signal generated by the clock board of the service board;
record the obtained CPU time and the obtained clock board time;
for performing CPU time synchronization between the service boards, obtain a current CPU time of the service board, and calculate a synchronization time of the CPU based on the current CPU time, and a last recorded CPU time, and a last recorded clock board time; and

adjust the CPU time of the service board to the synchronization time.