一种模糊自调整的PD-RED算法  

Fuzzy self-tuning PD-RED algorithm

作　　者：魏涛[1] 张顺颐[1] 

机构地区：[1]南京邮电大学

出　　处：《计算机工程与应用》2007年第5期124-126,162,共4页Computer Engineering and Applications

基　　金：国家高技术研究发展计划(863)(the National High- Tech Research and Development Plan of China under Grant No.2003AA121560);江苏省高技术研究计划资助项目(the Jiangsu Province High- Tech Research and Development Plan; China under Grant No.BEG200301)

摘　　要：RED算法作为第一代主动队列管理技术,能够有效地控制队列长度。然而RED算法在实现中存在着其队列长度依赖于流量负载的变化,网络性能对参数敏感的问题。论文将模糊控制技术与比例微分控制方法相互结合,采用模糊控制器在线调整比例微分控制器参数的方法实现RED算法控制。仿真结果证明,所提出的模糊自调整的PD-RED算法动态响应快,稳态误差小,能够使队列保持期望队列长度。RED algorithm works as first generation AQM technology,can control the queue length of router,however the algorithm of RED depends on in flow load in queue length and the network performance is a sensitive to parameters.In this paper,the authors put forward a fuzzy self-tuning PD-RED algorithm that uses a fuzzy controller to regulate the PD controller＇s parameters in real-time.According to the simulation result,the fuzzy self-tuning PD-RED algorithm gains rapid response and high precision and can make the queue keep the target queue length.

关 键 词：RED算法 队列长度 模糊控制 比例微分 自调整 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]