RBM: A Role Based Mobility Model for VANET

Simulation is an important approach to evaluate protocols. Realistic simulations lead to accurate evaluations. However, most of evaluations in VANET recently were still using MAN.ET mobility models or MANET models with a map bounder. Existing VANET mobility models, which treat all nodes identical, cannot reach most researchers´ demand. In this paper, we develop a role based mobility model for VANET. On contrast to existing models, nodes are differentiated by their roles. And nodes playing different roles have different strategy on both macro and micro mobility scope. Simulation shows that this new model are more realistic than existing models and can lead to many daily traffic situations that is easily observed in real life.