Analysis of Reliabilities under Different Path Loss Models in Urban/Sub-Urban Vehicular Networks

This paper studies the impact of propagation path losses in urban/sub-urban vehicular networks. The impact has been analyzed considering both the network-layer and application-layer reliabilities. We have built a realistic vehicular simulation environment and performed an extensive simulation experiment in a semi-urban traffic environment. The results show that there are significant performance differences between LOS (Line-of-Sight)/OLOS (Obstructed-LOS)/NLOS (Non-LOS) path loss model and any other studied loss model. With a moderate communication distance between a transmitter and a receiver (300 m), while with the other existing loss models the network-level reliability is around 60\%, with the LOS/OLOS/NLOS model that falls below 30\%. Moreover, the application-level reliability of LOS/OLOS/NLOS model is not more than 55\% for the delay sensitive safety application.