A METHOD, A SYSTEM AND A DEVICE FOR IMPLEMENTING TIME SYNCHRONIZATION IN COMMUNICATION NETWORK

摘要

A method for implementing time synchronization in communication network is provided which includes the following steps: the downstream network element calculates the absolute time difference and the time delays of the links between the downstream network element and the upstream network element (901); according to the absolute time difference and the time delays of the links, the downstream network element adjusts the absolute time of itself to implement the time synchronization with the upstream network element (902). A system and a network element device for implementing time synchronization in communication network are provided simultaneously. By using the method, the system and the device, time synchronization may be completed at low cost and in high precision.