改进的Smith预测控制器用于网络拥塞控制

15th International Conference on Advanced Computing and Communications (ADCOM 2007) Pub Date : 2007-12-18 DOI:10.1109/ADCOM.2007.94

P. Baburaj, S. Majhi, C. Reddy

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引用次数: 3

摘要

提出了一种改进的Smith预测器(MSP)控制器来设计一种新的主动队列管理(AQM)方案。对于传输控制协议(TCP)流动力学，该控制器将设定值响应与负载响应解耦，并显示出稳定的响应，而在实际条件下，该响应是高度振荡或不稳定的。所提出的控制方案能够成功地跟踪所需的缓冲水平，并有效地抑制任何负载干扰，如无响应的交通流。利用闭环系统响应的标准形式估计控制器参数。基于网络模拟器(ns-2)的仿真结果表明，与随机早期检测(RED)、比例与积分(PI)、线性二次型调节器(LQR)等常用方案相比，所提控制器的性能得到了改善。

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Modified Smith Predictor Controller for Network Congestion Control

This paper presents a Modified Smith Predictor (MSP) controller to design a novel Active Queue Management (AQM) scheme. The controller decouples the setpoint response from the load response and shows a stable response for a Transmission Control Protocol(TCP) flow dynamics, which is highly oscillatory or unstable under practical conditions. The proposed control scheme enables to track the desired buffer level successfully and reject any load disturbances such as unresponsive traffic flows efficiently. The controller parameters are estimated by the use of standard forms of closed loop system response. Network simulator (ns-2) based simulation results show improved performances of the proposed controller compared to that of some popular schemes like Random Early Detection(RED), Proportional and Integral(PI), Linear Quadratic Regulator(LQR) etc.

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15th International Conference on Advanced Computing and Communications (ADCOM 2007)

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