Dynamic layouts for wireless ATM

Abstract

In this paper we present a new model able to combine quality of service (QoS) and mobility aspects in wireless ATM networks. Namely, besides the standard parameters of the basic ATM layouts, we introduce a new one, that estimates the time needed to reconstruct the virtual channel of a wireless user when it moves through the network. QoS guarantee dictates that the rerouting phase must be imperceptible. Therefore, a natural combinatorial problem arises in which suitable trade-offs must be determined between the different performance measures. We first show that deciding the existence of a layout with maximum hop count h, load l and distance d is NP-complete, even in the very restricted case h = 2, l = 1 and d = 1. We then provide optimal layout constructions for basic interconnection networks, such as chains and rings. © Springer-Verlag 2003.