Performance Analysis of a Hierarchical Structured VANET

A vehicular ad hoc network (VANET) is an application of mobile ad hoc networks (MANETs) for vehicular communications. In this paper, we extend the technique of integrating Mobile IP with a MANET into a VANET. In our considered VANET, a collection of roadside gateways is deployed with each roadside gateway clusters a number of vehicles nearby to form a small-scale local VANET. We apply DSDV routing protocol with the Mobile IP to support communications for intra and inter local VANETs. We study the feasibility of this architecture and evaluate its transmission delay and delivery ratio. We further investigate the influence of key network configuration parameters including network density, node mobility, and number of gateways on performance measures.