基于分布式算法的时间同步系统的研究和实现

在依靠节点设备实现同步的电信网络中,为了应对由于节点交换机不能自动修正时间偏差而导致时间同步水平低下的问题,设计了一个基于分布式算法的时间同步系统。该系统独立于交换设备,以GPS为标准时间同步源,利用电信DCN网传输时间同步信息,通过NTP协议实现DCN网中各级时间服务器间同步。本文在对分布式系统时间同步算法进行研究的基础上,详细介绍了应用于接口机和交换机之间主动时间同步算法的实现原理,给出了减小系统误差的方法和系统告警注意事项。实践表明,该系统可以把全网中运行时间同步系统的设备之间的时间差控制在1 s范围内,具有较好的同步效果,值得推广。

Research and realization of time synchronization system based on distributing algorithm

In order to solve the problem of low time synchronization level in telecommunication network caused by that the node switches can not automatically revise time warping,a time synchronization system is designed based on distributing algorithm.This system uses GPS as the standard time synchronization source and can be independent to the switch equipment.It transmits synchronization information through telecom DCN network,and realizes synchronization of each level time servers in DCN via NTP protocol.Based on research of the time synchronization algorithm in distributing system,the paper introduces the principle of time synchronization algorithm applied between the server and the switch in detail,presents the methods of reducing error and the system alarm conditions.The results indicate that this system can control the time difference within 1 s among the equipments in time synchronization system and provide better synchronous effect.