计算机工程 ›› 2019, Vol. 45 ›› Issue (3): 138-141,147.doi: 10.19678/j.issn.1000-3428.0049809

• 移动互联与通信技术 • 上一篇    下一篇

基于IEEE 1588协议的时间触发以太网同步算法

赵琪1,赵怀林1,祝波2   

  1. 1.上海应用技术大学 电子与电气工程学院,上海 201418; 2.清华大学 计算机科学与技术系,北京 100084
  • 收稿日期:2017-12-22 出版日期:2019-03-15 发布日期:2019-03-15
  • 作者简介:赵琪(1991—),女,硕士,主研方向为网络通信协议;赵怀林,教授;祝波,硕士。
  • 基金项目:

    国家自然科学基金(61603210)。

Time-triggered Ethernet Synchronization Algorithm Based on IEEE 1588 Protocol

ZHAO Qi1,ZHAO Huailin1,ZHU Bo2   

  1. 1.School of Electrical and Electronic Engineering,Shanghai Institute of Technology,Shanghai 201418,China; 2.Department of Computer Science and Technology,Tsinghua University,Beijing 100084,China
  • Received:2017-12-22 Online:2019-03-15 Published:2019-03-15

摘要:

基于IEEE 1588时间同步的时间触发以太网(TTE)解决数据传输延迟的不确定性问题时,未考虑时间戳精度对IEEE 1588协议同步精度的影响。为此,建立一种频率漂移估计与偏差估计模型,计算时间戳精度对IEEE 1588协议同步精度的影响大小,并在理论上推导TTE协议时间同步与IEEE 1588协议时间同步的误差。实验结果表明,当时间戳精度达到0.1 μs或更高时,相对标准TTE时间同步算法,基于IEEE 1588协议的TTE网络具有更高的时间同步精度。

关键词: IEEE 1588协议, 时间同步, 时间触发以太网, 同步误差, 时间戳精度

Abstract:

Time-triggered Ethernet(TTE) based on time synchronization of IEEE 1588 solves the uncertainty problem of data transmission delay without considering the effect of timestamp accuracy on the synchronization accuracy of the IEEE 1588 protocol.To solve this problem,a frequency drift estimation and bias estimation model is established to calculate the impact of time stamp accuracy on the synchronization accuracy of the IEEE 1588 protocol,and the error of time synchronization between TTE protocol and the IEEE 1588 protocol is deduced theoretically.Experimental results show that the TTE network based on IEEE 1588 protocol has higher time synchronization accuracy than the standard TTE time synchronization algorithm when the timestamp accuracy reaches 0.1 μs or higher.

Key words: IEEE 1588 protocol, time synchronization, Time-triggered Ethernet(TTE), synchronization error, timestamp accuracy

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