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Communication Dans Un Congrès Année : 2011

Information Propagation Speed in Bidirectional Vehicular Delay Tolerant Networks

Emmanuel Baccelli
Philippe Jacquet

Résumé

In this paper, we provide an analysis of the informa- tion propagation speed in bidirectional vehicular delay tolerant networks on highways. We show that a phase transition occurs concerning the information propagation speed, with respect to the vehicle densities in each direction of the highway. We prove that under a certain threshold, information propagates on average at vehicle speed, while above this threshold, information propagates dramatically faster at a speed that increase exponentially when vehicle density increases. We provide the exact expressions of the threshold and of the average propagation speed near the threshold. We show that under the threshold, the information propagates on a distance which is bounded by a sub-linear power law with respect to the elapsed time, in the referential of the moving cars. On the other hand, we show that information prop- agation speed grows quasi-exponentially with respect to vehicle densities in each direction of the highway, when the densities become large, above the threshold. We confirm our analytical results using simulations carried out in several environments.
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Dates et versions

hal-00651599 , version 1 (13-12-2011)

Identifiants

Citer

Emmanuel Baccelli, Philippe Jacquet, Bernard Mans, Georgios Rodolakis. Information Propagation Speed in Bidirectional Vehicular Delay Tolerant Networks. INFOCOM 2011 - 30th IEEE International Conference on Computer Communications, Apr 2011, Shanghai, China. pp.436 - 440, ⟨10.1109/INFCOM.2011.5935199⟩. ⟨hal-00651599⟩
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