一种基于模糊控制的主动队列管理算法

主动队列管理技术作为Internet拥塞控制的一种有效方法，对于提高Internet的服务质量具有十分重要的作用，但计算机网络具有的复杂性和动态特性使传统控制理论难以进行主动队列管理算法的设计和分析。本文根据TCP拥塞控制算法基于数据包丢失的窗口变化机制。设计了一种基于模糊控制的主动队列管理算法，该算法依据路由器中瞬时队列长度的偏差及其偏差的变化量计算控制量，减轻路由器中的队列长度振荡现象。仿真结果表明该算法不但十分有效，而且对不同的网络状况具有很好的适应能力。

As an effective method for congestion control, Active Queue Management plays an important role in improving the QOS of the Internet,but due to the complexity and dynamic characteristics of computer network, traditional control theory is difficult to apply to the algorithm design and analysis of AQM,In this paper,we designed a fuzzy control algorithm for active queue management according to the TCP congestion control algorithm based on packet loss window change mechanism, this algorithm computes the control variable based on the deviation of the instant queue length and its variation, so that can reduce the oscillation phenomena of the router＇s queue length. Simulations show that this algorithm is very effective, and for different network status has the very good adaptability .