PTN网络中实现时间同步的一种方法

Implemention of Time Synchronization in PTN

随着数据业务的不断增加,传送网正由SDH/MSTP向PTN(分组传送网)演进。PTN作为一种面向分组的传输网技术,成为下一代传送网技术已大势所趋。因此,PTN上的时间同步方案亟待解决。IEEE1588v2是'网络测量和控制系统的精密时钟同步协议标准'(PTP),是通用的提升网络系统定时同步能力的规范。PTN基于IEEE 1588v2技术可以实现传送网的时间同步。本文首先介绍了IEEE 1588v2时间同步协议,然后对时间同步协议的具体实现过程进行了分析,最后提出了一种利用FPGA技术实现该协议的方法。

With the continuous increase of data traffic,transport network is in the evolution fromSDH/MSTP to PTN(Packet Transport Network).As a technology of transport network basing on packets,it must be a trend that PTN can become the next generation technology of transport network.Therefore,the need of time synchronization in PTN should be met.IEEE 1588v2 is a protocolstandard that enables precise synchronization of clocks in network measurement and control systems,which is a common standard to improve the time synchronization ability in network systems.Basing on IEEE 1588v2,PTN could be a transport network with the ability of time synchronization.This paper at first introduce the protocol of IEEE 1588v2,then analyse the method to how to achieve the time synchronization,and at last use FPGA to implement it.