面向菊花链拓扑结构的以太网高效实时协议  

High Efficient Real-time Protocol for Ethernet of Daisy-chain Topology

作　　者：王志成[1,2] 于东[2] 李培新[1] 陈猛[3] 

机构地区：[1]中国科学院研究生院,北京100039 [2]中国科学院沈阳计算技术研究所,沈阳110171 [3]沈阳高精数控技术有限公司,沈阳110171

出　　处：《小型微型计算机系统》2012年第7期1441-1444,共4页Journal of Chinese Computer Systems

基　　金：国家科技重大专项(2009ZX04009-013)资助

摘　　要：在工业自动化领域,采用菊花链拓扑结构的实时以太网得到了较为广泛的应用.在这种结构上,应用时间槽调度实时协议会由于数据交换次数的增多、延迟增大带来较为严重的效率问题.文章在分析其效率问题产生根源的基础上,提出一种高效实时协议.该协议能够充分利用实时以太网的全双工特性,减小数据交换延迟的影响.理论分析和实验结果证明,此协议能有效利用带宽,对通信效率有较大的改善.为采用菊花链拓扑结构的实时以太网,在工业领域的应用提供了更好的支持.Now real-time Ethernet of daisy-chain topology has been more widely used in industrial automation.In this structure,time slot scheduling protocol will has serious problem of efficiency due to the increase of delay time produced by data switch.Based on the efficiency analysis of the time slot scheduling protocol,the paper proposes a highly efficient real-time protocol.The protocol can use full duplex real-time characteristics of Ethernet,and reduce the delay of data switch.Theoretical analysis and experimental results show that this protocol can fully use bandwidth,and greatly improve communication efficiency.The protocol provides a good support for applications of real-time Ethernet of daisy-chain topology in industrial field.

关 键 词：实时以太网 菊花链拓扑 实时协议 高效通信 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]