Performance Evaluation of 802.11P Protocol for Emergency Application

Vehicle manufacturers have adopted this technology to assist the drivers drive their car like alarming the driver if he is close to some object while driving or safely parking the car to name a few. However, the main difference in an Adhoc network that involves a vehicle is the mobility factor. A vehicle is constantly in motion varying its location with time which means constant change in its position and surroundings. With the increase in the number of vehicles running in the road the probability of road accidents increases. The aim of the vehicle manufacturers and government agencies is to provide safe driving experience to save lives and assets. Sensor nodes has gone a long way from being just a technology to being an integral part of our life and its no surprise that vehicle manufacturers have incorporated them to create VANET that has a dedicated 802.11p protocol. In this essay based on my thesis, we show that 802.11p protocol is performing as per expected and all the nodes receive packet as should be the case. Simulation is done using an open source, discrete event driven tool called NS2 where a node generates and transmits a packet which is passed on by the other nodes. The simulation is performed considering node distance, retrans-mission attempt, and contention window. The results were analysed on the basis of con-figuration parameter mentioned. We evaluate the performance of 802.11p protocol by studying the output based on the node distance, retransmission attempt, and contention window. The graph generated from the simulation showed that all nodes receives a mes-sage which shows that 802.11p protocol is in fact working as intended. The most surprising result was that all of the nodes received the packet generated by the first node