Critical penetration for vehicular networks

Feasibility of a cooperative vehicle-to-vehicle (V2V) system requires certain number of vehicles equipped with a communication device in order to carry out the information away from the origination. This way, we can deploy safety, traffic management and entertainment applications1. V2V uses both direct relaying (multihop forwarding over vehicles) and transport relaying (store and forward) in order to propagate the information. We introduce a closed mathematical formula for penetration of equipped vehicles in direct relaying which is dominant in dense scenarios and then simulate both direct and transport relaying to investigate further the critical penetration that is required to enable most of the applications.