Advanced Junction-Based Routing in Vehicular Ad-Hoc Networks

This paper presents an efficient junction-based routing protocol for vehicle-to-vehicle (V2V) vehicular ad-hoc networks (VANETs) aided by the global positioning system (GPS) and digital maps. The new protocol uses effective routing table learning and maintenance to reduce the probability of finding no suitable relay vehicles at a designated junction in packet transmission. It can find vehicles for packet relay more accurately, enhance transmission stability and decrease the cost due to unnecessary packet discarding or repeated path searching. Simulation results show that it can ensure more efficient transmission than existing protocols without additional control overhead.