Stochastic Technique in Vehicular Ad-Hoc Networks Using Controlled Repetition Mechanism

Abstract

Vehicular ad hoc networks (VANETs) are a highly mobile wireless ad hoc networks that are targeted to support vehicular safety, traffic monitoring, and other applications. VANET applications are inherently broadcast oriented and require communication protocols to be reliable and scalable. Simple broadcast flooding satisfies these requirements, but its performance is highly dependent on network density and may lead to the broadcast storm problem. This work is the first we are aware of to propose controlled repetition stochastic broadcast as a solution for VANET. Stochastic broadcast directs each node to rebroadcast received messages with some probability. This probability may be fixed for all nodes or determined during runtime based on many factors. In this work, we study the impact of employment of controlled repetition and stochastic techniques on the performance of safety messages dissemination in VANET. The adequacy of the proposed techniques has been evaluated by a simulation. The results of this simulation show that the performance of VANET improves by setting proper parameters and the number of repetitions per priority class. Further, controlling the storm problem by stochastic technique can highly improve the performance of VANET for broadcasting of safety messages.