交换式工业以太网优先级调度机制的研究  

Research on priority mechanism in switched industrial Ethernet networks

作　　者：佟为明[1] 赵晶[1] 

机构地区：[1]哈尔滨工业大学电气工程与自动化学院,哈尔滨150001

出　　处：《仪器仪表学报》2007年第12期2197-2201,共5页Chinese Journal of Scientific Instrument

摘　　要：为使工业以太网中周期性实时数据的传输延时要求能够得以保证,本文对交换机的内部功能结构作出改进,并采用了IEEE802.1p规范中定义的带有优先级标志域的以太网帧格式进行数据通信。为验证改进性能,构建了一个星形交换式工业以太网模型。在基于改进的交换机结构模型中,实现了优先级调度机制在交换机及网络节点中的应用,OPNET仿真结果验证了其对工业以太网实时性的有效提高。Switched Ethernet is now making inroads in industrial communication. But different from many other applications, industrial real-time data requires the network technology to guarantee deterministic transfer delay. In the present paper, priority mechanism defined in IEEE802.1 p is introduced into both Ethernet switches and communication nodes. A priority-based protocol stack and promoted switched architecture is accessed. Finally the effectiveness of the prioritized Ethernet for delivering real-time is verified by a network simulation using OPNET modeler.

关 键 词：交换式以太网 IEEE802.1P 实时数据 队列 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]