The challenge of broadcasting at intersections in Vehicular Adhoc Networks

Vehicular Ad hoc Networks (VANETs) are new network environment for intelligent transportation systems. One of the fundamental services in VANET is broadcasting, that is a challenging task due to different road topologies and network conditions. One of its challenges is broadcasting at intersections, that because vehicles in different roads constituting an intersections can affect on broadcast process of other roads, message may not be propagated in some directions. In this paper we propose a method that by classifying vehicles based on their location and the road they move in solves this problem. Our method is simulated in NS2, and simulation results show our method assures broadcasting in all directions.