Effect of Vehicle Mobility on Connectivity of Vehicular Ad Hoc Networks
Connectivity is a fundamental requirement in the planning, design and evaluation of Vehicular Ad hoc NETworks (VANET). In this paper, the authors propose a new equivalent speed parameter and develop an analytical model to explain the effect of vehicle mobility on the connectivity of highway segments in a VANET. They prove that the equivalent speed is different from the average vehicle speed and it decreases as the standard deviation of the vehicle speed increases. Using the equivalent speed they derive a novel analytical expression for the average number of vehicles on a highway segment, which allows one to accurately predict the network 1-connectivity.