Vehicular Ad-hoc Networks: Point-to-Point, Emergency and Broadcast Communications

Bartlomiej Blaszczyszyn 1 Paul Muhlethaler 2 Nadjib Achir 3
1 TREC - Theory of networks and communications
DI-ENS - Département d'informatique de l'École normale supérieure, Inria Paris-Rocquencourt
2 HIPERCOM - High performance communication
Inria Paris-Rocquencourt, UP11 - Université Paris-Sud - Paris 11, Inria Saclay - Ile de France, X - École polytechnique, CNRS - Centre National de la Recherche Scientifique : UMR
Abstract : The aim of this paper is to analyze the Aloha medium access (MAC) scheme in one-dimensional, linear networks, which might be an appropriate assumption for Vehicular Ad-hoc NETworks (VANETs). The locations of the vehicles are assumed to follow a homegeneous Poisson point process. Assuming powerlaw mean path-loss and independent point-to-point fading we study performance metrics based on the signal-over-interference and noise ratio (SINR). In contrast to previous studies where the receivers are at a fixed distance from the transmitter, we assume here that the receivers are the nearest neighbors of the transmitters in the Poisson process and in a given direction. We derive closed formulas for the capture probability and for the density of progress of a packet sent by a given node. We compute the mean delay to send a packet transmitted at each slot until successful reception. We also evaluate an upper bound to discover the neighborhood within a given space interval. We show that we can include noise in the previous models.
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Bartlomiej Blaszczyszyn, Paul Muhlethaler, Nadjib Achir. Vehicular Ad-hoc Networks: Point-to-Point, Emergency and Broadcast Communications. Wireless Days, IFIP, Nov 2012, Dublin, Ireland. ⟨10.1109/WD.2012.6402813⟩. ⟨hal-00735184⟩

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