网络演算理论下的工业以太网的实时性分析  

Analysis on Real-time Performance in Industrial Ethernet Based on Theory of Network Calculus

作　　者：汪沁[1] 俞建定[1] 王新彪[1] 李向如 

机构地区：[1]宁波大学信息科学与工程学院,浙江宁波315211

出　　处：《无线电通信技术》2015年第3期28-29,62,共3页Radio Communications Technology

摘　　要：为了保证业务流在交换式工业以太网中传输的实时性,在交换机中引入了优先级调度机制,对源节点的业务流数据进行了流量控制。结合网络演算理论对交换式工业以太网的实时能力进行了分析,计算出交换机对不同数据类型的服务曲线,通过推导出的服务曲线计算出实时数据的最大网络时延和缓冲区大小,对考察交换式工业以太网的服务质量提供了一定的参考价值。In order to ensure real-time transmission of traffic flow in switched industrial Ethernet,the priority scheduling mechanism is introduced into switches, and the flow control is performed for traffic flow data of source node.Based on theory of network calculus, the real-time capability of switched industrial Ethernet is analyzed, and the service curves provided by switches for different types of data are calculated.The maximum network delays of real-time data and the memory size are calculated through the service curves, to some extent, this design provides some reference value for examining the quality of service of switched industrial Ethernet.

关 键 词：网络演算理论 时延 缓冲区 交换式工业以太网 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]