Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (5): 76-79,85.doi: 10.3969/j.issn.1000-565X.2010.05.015

• Computer Science & Technology • Previous Articles     Next Articles

A RCR Clock Synchronization Model with Drift Compensation

Quan Yu-juan1  Liu Gui-xiong2  Liu Bo2  Hong Xiao-bin2   

  1. 1.Computer Center,Jinan University,Guangzhou 510632,Guangdong,China;2.College of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-07-01 Revised:2009-09-01 Online:2010-05-25 Published:2010-05-25
  • Contact: 刘桂雄（1968-），男，教授，博士生导师，主要从事机电一体化技术研究．E—mail：megxliu@scut．edu．cn E-mail:quanyj@126．com
  • About author:全渝娟（1968-），女，博士，副教授，主要从事计算机应用和网络化控制研究．
  • Supported by:

    广东省科技计划项目（2008B010200012）; 教育部新世纪优秀人才支持计划项目（NCET-08-0211）

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Abstract:

Aiming at the high-accuracy clock synchronization with low cost in the industrial measurement and control system based on Ethernet,this paper presents a RCR（Remote Clock Reading） clock synchronization model with drift compensation,which is predominant in the precision of synchronization and the simplification of synchronization judgment and computation.Then,the architecture of the model is presented by integrating Timestamp Digi-tal Phase-Locked Loop in drift compensation,and the corresponding simulation is performed.Simulated results show that,as compared with the conventional message delay-based clock synchronization method NTP,the proposed model is more accurate,with an accuracy increase of one order of magnitude at least.

Key words: clock synchronization, drift compensation, delay measurement, Ethernet, industrial measurement and control system