H-infinity Based Active Queue Management Design for Congestion Control in Computer Networks†

Abstract

Abstract – In this paper the design of robust Active Queue Management (AQM) forcongestion control in computer networks is presented. The Ant Colony Optimization(ACO) method is used to tune the parameters of PID controller subject to H-infinityconstraints. The nonlinear dynamic model for multiple TCP flows control is developedbased on fluid-flow theory. The designed controller provides good tracking performancein the presence of wide range of system parameter uncertainty. NS2 package is used toperform the nonlinear simulation of the system.