A fuzzy clock synchronization algorithm for real-time ethernet

被引：0

作者：

Xie, Haofei ^{[1
]}

Xing, Yongkang ^{[1
]}

机构：

[1] College of computer science, ChongQing University

来源：

International Journal of Advancements in Computing Technology | 2012年 / 4卷 / 08期

关键词：

Fuzzy control; Precise time synchronization; Probabilistic clock synchronization;

D O I：

10.4156/ijact.vol4.issue8.22

中图分类号：

学科分类号：

摘要：

Clock synchronization is playing a key role in the deterministic communication of real-time Ethernet. In this study, based on IEEE 1588 precise clock synchronization protocol, a novel clock synchronization TPS algorithm was proposed to improve the accuracy and stability of the synchronization. This algorithm has improved the IEEE1588 communication model, analyzed the influence of the clock frequency difference on synchronization, as well as estimated the relative clock skew, by employing the linear regression method. With the probabilistic clock synchronization technology, it also provided the probability assurance of designated synchronization precision with the maximum transmission error ε max and variance σ d. Moreover, the algorithm has established a fuzzy control technology by adopting the transmission error and its change rate as the input, which could reduce external interference on the clock synchronization. After employing the improved TPS algorithm, the clock synchronization precision can be largely increased from 100 to less than 10μs, the needed synchronization times can be reduced from three to one, and the synchronization variance σ d can be immensely reduced from 60 to around 5μs.

引用

页码：181 / 189

页数：8

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