BSM: Broadcasting of Safety Messages in Vehicular Ad Hoc Networks

Vehicular Ad hoc Network (VANET) is a special type of Mobile Ad hoc Network (MANET). VANETs provide a collection of interesting safety applications. Many of these applications rely on broadcasting of messages to other vehicles. The simplest broadcasting algorithm is flooding. Because of large number of vehicles during peak hour, blindly flooding may lead to packet collision and high contention named broadcast storm problem. This paper presents a new broadcasting approach for safety messages (BSM) that dynamically adjusts waiting time of a vehicle according to the number of neighbor vehicles and distance to source. We evaluate the performance of our proposed approach in terms of reachability, overhead and forwarding node ratio. The simulation results show BSM introduces better performance than AMB.