Safety Applications Modeling Methodology and Performance Optimization in Road Vehicle Communication

For the safety applications in road vehicle communication, the existing research did not take it into account that the generation of the safety messages is event driven and the network traffic is self-similar. We propose an ON/OFF Pareto process based safety application self-similar model according to the above features and prove the effectiveness of this model analytically. Then we verify the model on NS2 simulation platform by showing the network traffic generated by our model is self-similar. At last, we use this model to simulate and analyze the performance of safety applications (adopting IEEE 802.11p) by computing the average delay and packet delivery ratio (PDR) with different vehicle densities, speeds and packets generation rates. The simulation results show that IEEE 802.11p can be used for safety applications in road vehicle communication. We also find the optimal working range for safety applications on vehicle density and packets generation rate except vehicle speed, which shows that we must make compromises between short delay and high packet delivery ratio. The conclusion is highly valued for safety applications applied in actual environment.