Phase Transition Behavior of Message Propagation in Delay Tolerant Vehicular Ad Hoc Networks

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Executive Summary

The vehicular networking environment is characterized by time-varying traffic density and relatively high vehicular mobility rates. Enabling networking in the vehicular environment is challenging due to the rapidly changing topology and the vast network of roadways. In this paper, the authors present an analytical model to describe the behavior of message propagation in a delay tolerant network formed over moving vehicles. They describe a model where partitioning between connected subnets exists in a network with time-varying topology. A messaging scheme exploits the time-varying partitioning to enable data exchange in a delay tolerant network setting. They derive the bounds for performance of message propagation in the vehicular networking environment.

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