基于以太网通信过程的实时改进方法研究  

Research on real-time improved method based on communication process of ethernet

作　　者：胡立坤[1] 王庆超[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《计算机工程与设计》2006年第9期1516-1520,共5页Computer Engineering and Design

基　　金：国家自然科学基金项目(60274002)

摘　　要：分析了以太网的通信过程、冲突处理方法、基本要求及其限制原因,指出1-坚持CSMA/CD处理过程与BEB退避算法对于实时节点具有改进空间,提出了一种以太网节点的实时改进方法。该方法允许网络中同时存在实时节点和非实时节点。分析了该方法端到端的延迟,对实时节点该延迟是有界的。介绍了用减少负荷的方法来提高节点的实时性。仿真实验表明该实时改进方法是有效的。The ethemet＇s communication progress and its collision disposal were analyzed along with its some basic requirements and reasons of its limits. The 1-persistence CSMA/CD and the BEB algorithm could be ameliorated in real-time nodes, and an improved method was presented. The method allows real-time nodes and non-real-time nodes existing in one network. The end-to-end delay of the method was analyzed and the delay is bounded in real-time nodes. The scheme of reducing network load was also expatiated to improve the real- time performance of the network nodes. Simulation shows that the improved method is effective.

关 键 词：CSMA/CD 实时 竞争信号 

分 类 号：TP393.01[自动化与计算机技术—计算机应用技术]