Comparative analysis of p-persistent and 1-persistent techniques for avoiding broadcast storming in VANETs

The purpose of this paper is to perform a comparative analysis of two famous techniques for avoiding broadcast storming in Vehicular Ad-hoc Networks (VANET). Increase in the number of vehicles on the road throughout the world, has increased the demand for safety of people. VANETs are gaining popularity because of their efficiency, reliability and improved performance than other Wireless Ad-hoc networks used for Intelligent Transportation Systems (ITS). Transmitting messages from one vehicle to another in VANET can be challenging due to frequently changing topologies caused by higher speed and extreme mobility of vehicles. Flooding is hence a technique used for sending messages from one vehicle to another. This flooding of messages can be expensive when there is a shared wireless medium as in case of VANETs. Various techniques are used to avoid flooding, however, in this paper, two basic techniques; p-persistent and 1-persistent are studied. The paper will go into detail for explaining the concept of both the techniques and would elaborate how and when these techniques are beneficial in VANETs. Various experiments have been performed to measure the efficiency and reliability of both the techniques in various scenarios and results have been encouraging