Abstract
Infrastructure-to-vehicle (I2V) multi-hop data forwarding is a common operation required by a wild variety of vehicular ad-hot network (VANET) applications. The current approaches of I2V routing protocol use vehicle trajectory information to predict destination vehicle’s future position. However, neither did the existing trajectory-based I2V routing protocols nor the existing simulation framework consider the situation that vehicles change their future trajectory accidentally, which due to driver’s behavior, traffic jam, road construction or car accident in a realistic scenario. In this work, we accommodate the existing simulation framework to make it be adaptive to trajectory-change events. We not only developed a module to simulate the trajectory-change events of vehicles but also developed a module to handle the trajectory-change events, which the mechanism can be defined by users. Furthermore, we give the user guide and general procedures for users who want to use our framework. Simulation results show that the data delivery ratio of a routing protocol with trajectory-change handling mechanism can remain stable and outperform the others without it while trajectory-change ratio varies, which indicates trajectory-change mechanism is necessary for I2V routing protocols to be applied to a realistic scenario in VANETs.