A novel event transmission protocol for vehicular ad hoc networks

In vehicular ad hoc networks (VANET), accidents or traffic congestion occurs due to driver behavior and change of lanes. Besides, people in the car may like to share some data such as games, music, and other information when they drive through the highways. Network services and road safety for the vehicles can be provided by the VANET. In IEEE 1609.4 standard, the channel application is divided into control and service channels, which is static. Due to static nature of the channel interval, transmission of safety and non-safety data cannot be handled efficiently. Though road accidents are normal, it may not occur more frequently and therefore the control channel used for broadcasting the safety message cannot be use efficiently. It will cause the wastage of channel due to fixed control channel and services channel intervals. In this paper, our goal is to increase the driving safety, prevention of accidents and efficient utilization of channels by adjusting the control and service channel intervals dynamically. Hence, we propose here a dynamic channel adjustment protocol based on IEEE 1609.4 standard that can adjust the control and service channel to transmit the message efficiently. Simulation results of our protocol shows that it can outperform the standard in terms of number of dropped packets and idle time for different number of nodes within the communication range.