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《中国工程科学》 >> 2006年 第8卷 第6期

交换式以太网NC建模与实时性能分析

天津大学电气与自动化工程学院,天津 300072

收稿日期: 2005-07-01 修回日期: 2005-08-25 发布日期: 2006-06-20

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摘要

交换式以太网的实时性能分析是工业以太网研究领域的一个热点课题,目前还没有一个有效的数学模型来对其进行描述。通过对典型交换机结构的分析,应用网络微积分理论建立了交换机的服务曲线模型,该模型将交换机中的数据流分为实时数据和非实时数据,并得到了最大延迟值和最大缓存需求值等,最大延迟为交换机的实时应用提供了理论边界值,最大缓存需求值为在实时工业环境中的交换机构建提供了理论参考。

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