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1. (WO2018082665) FREQUENCY SYNCHRONIZATION METHOD AND SLAVE CLOCK

Pub. No.:    WO/2018/082665    International Application No.:    PCT/CN2017/109377
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Sat Nov 04 00:59:59 CET 2017
IPC: H04L 7/00
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: LV, Jingfei
吕京飞
WANG, Jinhui
王锦辉
XU, Chuan
徐川
Title: FREQUENCY SYNCHRONIZATION METHOD AND SLAVE CLOCK
Abstract:
Provided is a frequency synchronization method. The method comprises: a slave clock receives a first pulse signal and a second pulse signal; the slave clock determines that a frequency deviation of the slave clock with respect to a master clock is equal to a first frequency deviation according to a first phase difference, a second phase difference, a first delay and a second delay, wherein the first phase difference is a difference between a phase of a third pulse signal generated by the slave clock and a phase of the first pulse signal received by the slave clock, and the second phase difference is a difference between a fourth pulse signal generated by the slave clock and a phase of the second pulse signal received by the slave clock; and the slave clock calibrates the frequency of the slave clock according to the first frequency deviation. Also disclosed is a corresponding slave clock. The foregoing solution helps improve precision of frequency synchronization.