Optimal feedback control of ABR traffic in ATM networks

Abstract

In this work we examine the problem of regulating available bit rate (ABR) traffic in an ATM network. A unique feature of ABR service is the requirement that sources be regulated using information from distant ATM nodes. This feature is problematic for source control schemes when the time-delays incurred in the feedback path and the temporal variation in the link capacity at the ATM node are considered. A source rate control algorithm that allows for the coordination of the traffic between sources sharing a congested node is presented. The coefficients of the controller are chosen subject to the minimization of a quadratic performance index. The results of the method are also given.