Performance Evaluation of Traffic Information dissemination Protocols for Dynamic Route Planning Application in VANETs

Kurzfassung

Dynamic route planning is one of the ITS efficiency applications that reduce travel time and energy consumption. To perform efficient route planning, real-time traffic information should be collected and disseminated to vehicles on other road segments. vehicular ad-hoc networks (VANETs) are a promising technology that can provide the communication means to deliver the required traffic information. In this paper, we study and evaluate three dissemination protocols in realistic vehicular scenarios. The evaluated protocols are geocast-based beacon piggybacking protocol, a low-overhead adaptation of it and greedy perimeter stateless routing (GPSR). As performance metrics we measure the average end-to-end delay, average routing overhead and the packet delivery ratio as a function of traffic density. The goal is to find a reliable dissemination protocol that fulfills the application requirements and requires low routing overhead. Simulation results show that all three protocols achieve the requirements of dynamic route planning in end-to-end delay and packet delivery ratio. However, a significant reduction in the routing overhead can be achieved by the modified piggybacking protocol.