Doubly finite queues DFQ supportingFor ABR traffic in ATM networks usingMSVDR algorithm

Abstract

The Asynchronous Transfer Mode ATM forum has proposed the newlinePrivate NetworkNetworkInterface PNNI specification to facilitate routing newlinefacilities to the customers The prepath selection or routing algorithm newlineguarantees the users multiple Quality of Service QoS requirements ATM newlineForum 1996 The PNNI protocol provides the routing framework but it does newlinenot standardize the method of finding an appropriate path for ATM switching newlinedesign In this research finding a new ATM switching design with Doubly newlineFinite Queues DFQ management for on demand path calculation in newlinecongested ATM network is proposed Dynamic routing algorithm also called newlineMulti Source Virtual Dynamic Routing MSVDR for ATM networks with newlinethe PNNI protocol is used in this new switching design newlineATM an ultimate solution of BroadbandIntegrated Service Digital newlineNetwork BISDN to provide integrated multimedia services including voice newlineVideo and data has come to limelight with increased demand for such newlineServices Hence ATM is to be capable of supporting a variety of service newlineclasses and providing appropriate QoS according to classes This may force newlineone to sacrifice low priority traffic classes for high priority traffic classes to newlinesatisfyQoS requirements for the high priority traffic classes in case of newlinecongestion There have been many possibilities suggested for traffic control in newlineterms of QoS andCell Loss Priority CLP controlwhich was originally newlineintroduced in ATM networks for the purpose of congestion control newline newline