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Comparison of PI controllers designed for the delay model of TCP/AQM networks

机译:为TCP / AQM网络的延迟模型设计的PI控制器的比较

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One of the major problems of communication networks is congestion. In order to address this problem in TCP/IP networks, Active Queue Management (AQM) scheme is recommended. AQM aims to minimize the congestion by regulating the average queue size at the routers. To improve upon AQM, recently, several feedback control approaches were proposed. Among these approaches, PI controllers are gaining attention because of their simplicity and ease of implementation. In this paper, by utilizing the fluid-flow model of TCP networks, we study the PI controllers designed for TCP/AQM. We compare these controllers by first analyzing their robustness and fragility. Then, we implement these controllers in ns-2 platform and conduct simulation experiments to compare their performances in terms of queue length. Taken together, our results provide a guideline for choosing a PI controller for AQM given specific performance requirements.
机译:通信网络的主要问题之一是拥塞。为了解决TCP / IP网络中的此问题,建议使用主动队列管理(AQM)方案。 AQM旨在通过调节路由器的平均队列大小来最大程度地减少拥塞。为了改进AQM,最近提出了几种反馈控制方法。在这些方法中,PI控制器因其简单性和易于实现而受到关注。在本文中,通过使用TCP网络的流体模型,我们研究了为TCP / AQM设计的PI控制器。我们首先通过分析其鲁棒性和脆弱性来比较这些控制器。然后,我们在ns-2平台中实现这些控制器并进行仿真实验,以比较它们在队列长度方面的性能。综上所述,在给定特定性能要求的情况下,我们的结果提供了为AQM选择PI控制器的指南。

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