Abstract
The VANET (Vehicular Ad hoc Network) is a collection of mobile nodes forming a temporary network on variable topology, operating without base station and without centralized administration. Communication is possible between vehicles within each other's radio range as well as with fixed components on road side infrastructure. The characteristics of VANET network that distinguishes it from other ad hoc networks, such as high mobility and communication with the infrastructure to support security or comfort applications, have prompted researchers to develop models and mobility specific protocols. The main goal of this chapter is firstly to compare the performance of three Ad hoc routing protocols: OLSR, AODV and DSDV, and secondly to examine the impact of varying mobility, density and pause time on the functionality of these protocols. The results of this chapter demonstrate that AODV have better performance in terms of Throughput and Packets Delivery Rate (PDR), whereas OLSR have best performance in terms of Packet Delivery Time (Delay).
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