Multiple time-delays system modeling and control for router management

TL;DR

This paper models and controls TCP network congestion using a multiple time-delays feedback control approach, employing robust control techniques to stabilize network variables and prevent overloads.

Contribution

It introduces a novel multiple time-delays model for TCP/AQM systems and applies quadratic separation-based robust control for congestion management.

Findings

Effective stabilization of network variables demonstrated through simulations.

Robust control framework successfully manages TCP congestion.

Numerical example validates the proposed control methodology.

Abstract

This paper investigates the overload problem of a single congested router in TCP (Transmission Control Protocol) networks. To cope with the congestion phenomenon, we design a feedback control based on a multiple time-delays model of the set TCP/AQM (Active Queue Management). Indeed, using robust control tools, especially in the quadratic separation framework, the TCP/AQM model is rewritten as an intercon- nected system and a structured state feedback is constructed to stabilize the network variables. Finally, we illustrate the proposed methodology with a numerical example and simulations using NS-2 simulator.