摘要
以太网是一种针对商业使用的非确定性网络 ,不能满足工业控制中的实时性要求 .提出一种新的基于持续竞争的实时以太网介质访问控制协议 ,该协议能够保证实时信号的发送有确定的最大时延 ,而且该协议与现有的以太网介质访问控制协议兼容 .描述了协议的工作过程 ,分析了实时信号的最大发送时延和信道吞吐量特性 。
Ethernet media access control (MAC) protocol is aimed at commercial rather than hard real time applications, mainly due to its nondeterminidtic nature. This paper proposed a new persistent contention based real time Ethernet MAC protocol that provides a predictable upper bound for the delivery delay of real time frames. Moreover, it is compatible with the protocol used by the existing Ethernet controllers for conventional datagram traffic. The paper described the protocol in detail and analysed the maximum delivery delay for real time traffic and the efficiency of the channel. The analysis and the simulation results demonstrate the method is correct and effective.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2002年第4期521-525,共5页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目 ( 6 99840 0 3)
