CLOCK SYNCHRONIZATION METHOD, SYSTEM AND DEVICE

摘要

A clock synchronization method, comprising: receiving at least two clock signals, the at least two clock signals being sent by bidirectional clock tracking links respectively corresponding thereto; setting two or more clock signals coming from the same network element into the same clock source group; selecting one clock signal in a terminal of the same clock source group as a currently tracked clock signal; and if the currently tracked clock signal belongs to the clock source group, respectively sending standby clock signals carrying quality-level do not use information by means of the bidirectional clock tracking links respectively corresponding to each of the clock signals in the clock source group. The present invention achieves the effect that in the scenario where there are two or more bidirectional clock tracking links between two network elements, clock tracking loops will not be generated even if a certain bidirectional clock tracking link generates a failure or the clock quality level of the clock signal therein is reduced.