Abstract
The purpose of this paper is to design congestion controller for TCP/AQM (transmission control protocol/active queue management) networks using model following control; the equilibrium of a class of TCP/AQM networks with time-delay is investigated, and the effect of communication time-delay on the stability is addressed. The features of this design method are bounded property of the internal states of the control system being given and the utility of this control. Such design exhibits important attributes including fast convergence with high accuracy to a desired queue length. Simulation results show that the time-delay nonlinear behavior of the system can be controlled by this method.
Highlights
In recent years, with the rapid growth of throughput-demanding applications, congestion control has emerged as a major issue in computer and communication network design [1]
The purpose of this paper is to design a congestion controller based on the model following control system (MFCS) [22, 23] control theory
We propose a design of model following control system with disturbances
Summary
With the rapid growth of throughput-demanding applications, congestion control has emerged as a major issue in computer and communication network design [1]. AQM schemes have been proposed to complement the TCP network congestion control [2]. Several mathematical models are developed by some researchers [3,4,5] and a variety of control theory-based AQM schemes are proposed based on these models. Based on the system model for congestion control in transmission control protocol TCP/AQM networks, control theory-based approaches are utilized either to analyze or to design the AQM schemes. Based on the system model, several conventional controllers [10,11,12,13,14,15] are designed as AQM methods in TCP networks
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