文献类型：期刊文献

中文题名：一种基于模糊-比例积分双模控制的主动队列管理算法

英文题名：A New Active Queue Management Algorithm Based on Fuzzy-PI Control

作者：罗鸣[1];牛玉刚[1];王行愚[1];孙培林[1]

机构：[1]华东理工大学信息科学与工程学院,上海200237

年份：2008

卷号：34

期号：1

起止页码：103

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金(60674015);上海市自然科学基金(04ZR14034);高等学校博士点基金(20040251010)

语种：中文

中文关键词：模糊-比例积分;主动队列管理;自适应

外文关键词：fuzzy-PI; active queue management; adaptive

摘要：通过将模糊推理方法和PI算法相结合,提出了一种新的主动队列管理(AQM)算法——基于模糊-比例积分(Fuzzy-PI)的双模态控制主动队列管理算法——Fuzzy-PI AQM算法。该算法的基本思想是当偏差很大时,使用模糊逻辑控制,当偏差小于某一阈值时,则切换到PI控制,从而将模糊逻辑控制的鲁棒性强和收敛速度快的特点与PI控制稳态性能好的特点有机地结合起来,实现对网络拥塞的有效控制。而且,由于在设计模糊控制器时采用了合成推理的查表法,极大地提高了模糊控制的实时效果,节省内存空间,优化了路由器的控制性能。仿真结果表明:Fuzzy-PIAQM算法的性能优于传统的PI算法,对队列控制能力强,鲁棒性好,能很好地抵抗突发性业务的干扰,更适合工作在瞬息万变的动态网络环境中。
The traditional PI algorithm has its difficulty in active adapting to the ever-changing network environment. So its application range is limited. By combining the fuzzy technique and PI control method, this paper proposed a new active queue management （AQM） based on fuzzy-PI double model control. The basic conception of fuzzy-PI AQM is that, for the case that error signal is large, we use fuzzy control with its quick convergence speed and strong robustness; for the case that error signal is less than the threshold, we change to PI control with its strong stability. The table query method is used when we design the fuzzy controller that can greatly improve the real time control performance of fuzzy control, veguire less memory time and optimize the control performance of router. The simulation results show that the new fuzzy-PI algorithm outperforms the traditional PI algorithm in the robust performance and the better anti-interference for sudden accident, etc. It is more suitable to be used in the ever-changing network environment.