基于IEEE1588协议的精确时钟同步算法改进

Improvement of the Precise Time Synchronization Algorithm Based on IEEE1588

在工业控制领域,时钟同步精度是影响工业以太网实时性的一个重要因素。为了满足工业以太网对时钟同步的高精度要求,本文对IEEE1588精确时间同步协议进行了研究,阐述了该算法实现高精度同步的原理,并针对以太网通讯路径不对称的情况,提出了一种同步改进算法,通过对同步延迟计算进行加权修正,提高了时钟同步精度。最后,在自行设计的测试系统中进行了测试,测试结果表明,改进算法有效提高了路径不对称条件下的时钟同步精度。

In the field of industrial control, clock synchronization precision is an important factor that affects the realtime performance of the industrial Ethernet. In order to satisfy the request for precise clock synchronization in the industrial Ethernet, this paper conducts the research to the IEEE1588 highprecision time synchronization protocol, carries on the elaboration to the principle of highprecision synchronization, proposes the corresponding improvement algorithm for asymmetric communication paths. Finally, the algorithm is tested in a selfdesigned system. The results of test show that the improved algorithm can effectively increase the clock synchronization accuracy under asymmetric communication paths.