控制理论在主动队列管理中的应用

来源期刊：中南大学学报(自然科学版)2003年第4期

论文作者：林斌 王智 孙优贤

文章页码：428 - 431

关键词：网络服务质量;主动队列管理;控制理论

Key words：quality of services; active queue management; control theory

摘    要：拥塞控制中作用于网络中间节点的主动队列管理策略(AQM)是解决IP网络拥塞问题和保证QoS的重要途径.运用控制理论,首先对TCP拥塞控制机制建模,在此基础上运用经典控制理论对主动队列管理各种策略进行分析,着重对AQM的唯一候选算法———随机早期检测(RED)算法进行分析与探讨,给出针对AQM策略的比例及比例积分控制器设计.针对网络本身是一个复杂、时变与不确定性的系统,智能控制理论更适合这类对象分析,为此,引入的智能控制理论采用模糊控制和神经网络控制对AQM策略进行研究和分析.

Abstract: Quality of services (QoS) is one of the most active research areas within the networking field. Active queue management (AQM) aiming at the middle nodes is an important approach to resolving the congestion problem in IP network, and it guarantees QoS. The paper researches the AQM from the control-theoretic point of view. Firstly we model the network of TCP congestion control. Then we research the AQM in the classical control theory based on the simplified model. We focus on the RED(Random Early Detection)and research the P/PI controller in AQM. The network is complex, variable and uncertain. Intelligent control is powerful in the research of AQM using fuzzy controller and neural controller. Finally some future researches are proposed.