Modified Smith Predictor for Network Congestion Control

P. Baburaj, S. Majhi
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Abstract

In this paper, a novel active queue management (AQM) control law using modified Smith predictor is proposed. The proposed method provides a stable response for a TCP flow dynamics which is highly oscillatory or unstable under practical conditions. The controller decouples the setpoint response from the load response. The proposed control scheme can track the desired buffer level and reject any additional load disturbance such as unknown buffer depletion rate. Simulation results show high performance for the setpoint response when the parameters of TCP flow dynamics are known
修改史密斯预测网络拥塞控制
提出了一种基于修正Smith预测器的主动队列管理(AQM)控制律。该方法对实际条件下高振荡或不稳定的TCP流动力学提供了稳定的响应。控制器将设定值响应与负载响应解耦。所提出的控制方案可以跟踪期望的缓冲电平,并抑制任何额外的负载干扰,如未知的缓冲区耗尽率。仿真结果表明,当TCP流动力学参数已知时,该设定值响应具有较高的性能
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