Performance Evaluation of Different Routing Protocols in a Vehicular Delay Tolerant Network

Vehicular networks have highly dynamic network topology and characterized by disruptive and intermittent connectivity. Vehicular Delay-Tolerant Network (VDTN) architecture is used to deal with these connectivity constraints. In order to handle disconnections and long delays in vehicular network scenarios, VDTN uses store-carry-and-forward approach. In this work, we evaluate the performance of three different routing protocols in a VDTN. We study the impact of transmission range and ttl on the network performance. For the simulation we have used the Opportunistic Network Environment (ONE) simulator. The performance is analyzed using three metrics: Delivery probability, Overhead ratio and Average Latency. The simulation results show that the increase of transmission range increase the delivery probability and overhead ratio and decrease the latency for three routing models. The increase of ttl from 30 to 60 min increases three performance metrics, but further increase does not effect anymore the network performance.