RESOURCE-MANAGEMENT IN WIDE-AREA ATM NETWORKS USING EFFECTIVE BANDWIDTHS

This paper is principally concerned with resource allocation for conne ctions tolerating statistical quality of service (QoS) guarantees in a public wide-area ATM network. Our aim is to sketch a framework, based on effective bandwidths, for call admission schemes that are sensitiv e to individual QoS requirements and account for statistical multiplex ing. Recent results approximating the effective bandwidth required by heterogeneous streams sharing buffered links, including results for th e packetized generalized processor sharing service discipline, are des cribed. Extensions to networks follow via the concept of decoupling ba ndwidths-motivated by a study of the input-output properties of queues , Based on these results we claim that networks with sufficient routin g diversity will inherently satisfy nodal decoupling. We then discuss on-line methods for estimating the effective bandwidth of a connection . Using this type of traffic monitoring we propose an approach to usag e parameter control (i.e., policing) for effective bandwidth descripto rs. Finally, we suggest how on-line monitoring might be combined with admission control to exploit unknown statistical multiplexing gains an d thus increase utilization.