Mobility

A Model Based Connectivity Improvement Strategy for Vehicular Ad Hoc Networks

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Executive Summary

Vehicular Ad hoc NETworks (VANETs) are formed spontaneously among nodes on road, where nodes represent moving vehicles, pedestrians, or fixed Road Side Units (RSUs) equipped with wireless communication devices. Due to the vehicle movements and fading phenomena, some links in VANETs will be broken and others will be generated, resulting in a dynamical and unstable topology. According to the results obtained in, the connectivity in VANETs could be easily jeopardized because of the dynamical topology, especially in sparse free-flow traffic situations, where the density of vehicles travelling on the road is low, leading to high randomness in vehicles' geographic distribution and velocity.

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