摘要
影响控制网络实时性的关键因素之一是媒体访问控制协议。在控制网络中常用的媒体访问控制协议是:CSMA/CD、令牌总线和主从式媒体访问控制协议。本文主要阐述了它们的工作原理并分析了它们的优缺点,指出了使用各种协议的条件与要求。
One of key factors that influence the real-time property of control network is media access control (MAC)protocol.MAC protocols that are adopted in control network include CSMA/CD,Token Bus and master-slave MAC.Their control principles are elaborated and their advantag es and disadvantag es are analysed.The limitations of these MAC protocols are put forward.
出处
《工业控制计算机》
2002年第1期42-47,共6页
Industrial Control Computer
关键词
控制网络
媒体访问控制协议
令牌总线
局域网
control network,media access control (MAC)protocol,CSMA/CD(Carrier Sense Multiple Access With Collision Detection),Token Bus,master-slave MAC protocol
