作　　者： ; ; ; ;

机构地区： 中国科学院沈阳自动化研究所

出　　处： 《仪器仪表学报》 2007年第11期2072-2077,共6页

摘　　要： 通过对过程工业通信需求、基金会现场总线和IEEE802.11通信机制的分析,本文提出了基于IEEE802.11的无线基金会现场总线,说明了它的网络结构、通信协议体系和各层功能。详细分析了H1网络的数据链路层协议,它集成了集中控制和分布竞争的信道访问机制,信道划分为周期性超帧,包含无竞争段、竞争段和预定通信段。性能分析表明,无线基金会现场总线可以满足工业无线通信实时性、可靠性、灵活性和低能耗的要求。 Through the analysis of communication requirements of process industrial, communication mechanisms of Foundation Fieldbus and IEEE 802.11, wireless Foundation Fieldbus based on IEEE802.11 is presented. Its network structure, communication protocol architecture and layer functions are explained. The data link layer protocol of H1 network is especially analyzed. It integrates central control and distributed contention channel access mechanisms. The channel is divided into periodic superframes, which contain contention-free period, contention period and predefined communication period. Performance evaluation shows that the proposed wireless Foundation Fieldbus can meet the real-time, reliability, flexibility and low power consumption requirements in industrial wireless communication.

关 键 词： 基金会现场总线 无线基金会现场总线 数据链路层 超帧 轮询 性能分析

领　　域： [自动化与计算机技术] [自动化与计算机技术]