地铁时钟系统更新为以太网传输组网的实施方案

Solution to Update Transmission Network of Subway Clock System as Ethernet

在轨道交通领域,通信、信号及其他专业系统设备的时钟系统为控制中心和车站提供统一的时间基准,其传输一般采用SDH低速率接口模式。随着传输系统已更新为以太网,时钟系统也要同步更新。以北京地铁1号线和2号线为例,详细介绍时钟系统更新为以太网传输组网的实施方案。

In a rail transit,the clock system of communication,signal and other specialties provides a unified time reference for the control center and the stations,and generally adopts low-rate SDH interface.Since the transmission system has been updated as Ethernet,the clock system is required to be updated simultaneously.Taking Line 1 and Line 2 of the Beijing Subway as an example,the solution of updating the transmission network of the clock system as Ethernet is introduced in detail.