通信学报 ›› 2012, Vol. 33 ›› Issue (Z2): 196-200.doi: 10.3969/j.issn.1000-436x.2012.z2.027

• 学术论文 • 上一篇    下一篇

EPA网络三大延迟因素的权重及变化分析

姜秀柱1,邓德玖1,冯冬芹2   

  1. 1 中国矿业大学 计算机科学与技术学院，江苏 徐州 221116
    2 浙江大学 先进控制技术研究所，浙江 杭州 310000
  • 出版日期:2012-11-25 发布日期:2017-08-03

Analyzing the weights and its variation of the three delays in EPA network

Xiu-zhu JIANG1,De-jiu DENG1,Dong-qin FENG2   

  1. 1 The School of Computer Science and Technology,China University of Mining and Technology,Xuzhou 221116,China
    2 Institute of Advanced Control Technology,Zhejiang University,Hangzhou 310000,China
  • Online:2012-11-25 Published:2017-08-03

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摘要：

分析了EPA微网段三大延迟因素：排队延迟、节点信息处理延迟和发送和传播延迟，讨论了三大延迟因素对实时性能的权重影响，通过分析节点数量N和调度算法因子α对延迟的影响，得出了2个结论：1)N=8是排队延迟和节点信息处理延迟的“二八”现象的拐点；2) 当α□0.32时，排队延迟就会降为影响延迟的次要因素。上述结论为提高EPA网络实时性能措施提供了参考方向。

关键词: EPA, 微网段, 排队延迟, 节点信息处理延迟, 调度因子, 节点数量

Abstract:

Three delay factors of EPA micro segment:queuing delay,node information processing delay and transmission and propagation delay was analied,and the weight influence of the three major factors of delay on the real-time performance was discussed,through the analysis of the number of nodes in the N and scheduling algorithm factor α on the effects of delay variation,reached two conclusions:1) N=8 is the inflection point of phenomenon of "two eight"between queue delay and node information processing delay;2)when α□0.32,queuing delay will be reduced to be the secondary factors for the influence of the delay.The conclusions provide EPA network reference directions for measures to improve the real-time performance.

Key words: Ethernet for plant automation, micro segment, queuing delay, processing delay, scheduling factor;number of nodes

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