• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊
论文

基于IEEE1588协议的精确时钟同步算法改进

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  • (郑州轻工业学院计算机与通信工程学院,河南 郑州 450002)
李学桥(1951),男,湖北武汉人,教授,CCF会员(E200008277S),研究方向为嵌入式系统与智能控制、计算机网络。陈园(1986),男,河南平顶山人,硕士生,CCF会员(E200015442G),研究方向为嵌入式与智能系统。梁爽(1984),女,河南辉县人,硕士生,研究方向为嵌入式与智能系统。

收稿日期: 2010-03-20

  修回日期: 2010-06-28

  网络出版日期: 2011-02-25

Improvement of the Precise Time Synchronization Algorithm Based on IEEE1588

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  • (School of Computer and Communication Engineering,Zhengzhou University of Light Industry,
    Zhengzhou 450002,China)

Received date: 2010-03-20

  Revised date: 2010-06-28

  Online published: 2011-02-25

摘要

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。

本文引用格式

李学桥,陈园,梁爽 . 基于IEEE1588协议的精确时钟同步算法改进[J]. 计算机工程与科学, 2011 , 33(2) : 42 -45 . DOI: 10.3969/j.issn.1007130X.2011.

Abstract

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.

参考文献

[1]IEEE Std 15882002,IEEE Standard for a Precision ClockSynchronization Protocol for Networked Measurement and Control Systems[S].New York: The Institute of Electrical and Electronics Engineers,2002.
[2]Eidson J C, Hamilton B. IEEE1588 Node Synchronization Improvement by High Stability Oscillators[S].Workshop on IEEE1588,Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems,2003.
[3]时玉娟,赵建,方海燕,等. IEEE1588同步时钟的分析与应用[J]. 仪表技术,2007(9):1214.
[4]戴宝峰,崔少辉,王岩. 基于IEEE1588协议的时间戳的生成与分析[J]. 仪表技术,2007(7):1517.
[5]蒋荣金,尚群立,余善恩. EPA工业测控网络的时钟同步分析与改进[J]. 机电工程,2009,26(1):1720.

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