Performance analysis of an improved probability-based and counter-based broadcast protocols for VANETs

VANETs use many wireless communication techniques to improve driver's safety and transportation efficiency. Therefore, the design of a good broadcasting protocol that performs well in all criteria in order to avoid storm problem, remains the most paramount task. The thriving chore is how to maximize reachability while minimizing saved rebroadcast and end to end delay. Most of prior work maximizes reachability or minimizes the delay, but not both. In This paper, a novel method was proposed to calculate the waiting time of the counter-based and probability-based schemes, based on the speed of the vehicle, to assess the congestion level of the network. Simulation results through ns2 using 802.11P show that the new method give better performances using different mobility scenaios (Grid and highway Map).