How to choose a model for ad hoc wireless networks [articol]

Abstract

This paper studies ad hoc wireless networks using a network information theory point of view. Two classes of networks are analyzed in the paper, considering the location of the nodes and the traffic graphs: arbitrary and random. Three theoretical models are presented for multi-hop transport, and each of them takes into account different aspects of these types of networks: protocol restrictions, interference, bandwidth. The minimal model parameters are inventoried, and their influence on the model behavior is discussed. New metrics are introduced, to allow a more accurate representation of the information flow in wireless networks. The current status and difficulties of the traditional information theory to describe this multiple input-output system are discussed. The third model that we introduce is an extension of the interference model, that adds a new parameter, bandwidth, and an optimum criteria using results from information theory of MIMO systems. The intention to bring together information theory and network protocols is the right way to analyze the limitations of the current implementations of such systems.