針對(duì)工業(yè)控制系統(tǒng)的特點(diǎn)，在不改變以太網(wǎng)協(xié)議的條件下,采用一種新的動(dòng)態(tài)通信平
滑過濾器來控制網(wǎng)絡(luò)負(fù)荷以滿足控制系統(tǒng)的實(shí)時(shí)通信要求。研究表明：該動(dòng)態(tài)通信平滑過濾器不僅可以為非實(shí)時(shí)數(shù)據(jù)提供合理的網(wǎng)絡(luò)吞吐率，并且可以顯著地控制實(shí)時(shí)數(shù)據(jù)傳輸?shù)某瑫r(shí)比率，其性能明顯優(yōu)于靜態(tài)通信平滑過濾器。
關(guān)鍵字： 工業(yè)以太網(wǎng)；通信平滑；實(shí)時(shí)通信
Study Of Adaptive-rate Traffic Smoother Over Industrial Ethernet Shi Xiao-yong, Xu Wen-bo, Yang Chao-long (Institute of Information Engineering，Southern Yangtze University，Jiangsu Wuxi 214122) Abstract：Due to the characteristic of industrial control systems, a methodology was presented that using a new adaptive-rate traffic smoother to control the network load so as to meet the requirement of real-time communications without changing the protocol of Ethernet. The result shows that the proposed traffic smoother can not only provide a reasonable average throughput-rate for non-real-time data but also yield a remarkable low deadline-miss ratio for real-time data communications. It is obvious that the performance of the adaptive-rate traffic smoother is better than that of the fix-rate traffic smoother’s.
Keywords: Industrial Ethernet; traffic smoothing; real-time communication