Abstract
In the market, there was only specific software for network simulation or traffic simulation. They were expensive and could not support the routing simulation for vehicular network. In order to solve the problem, typical wireless ad hoc routings for vehicular network was researched in the free network simulation software NS2. The obstacle model and node mobile model were added. The nodes moved in random speed and direction on the road. Then the typical wireless ad hoc routings such as DSR (dynamic source routing), DSDV(destination sequenced distance vector) and AODV (ad hoc on-demand distance vector routing) were researched in the environment. The network packet loss rate and end to end delay time were compared and analyzed under the different situation whether obstacles block the radio. If obstacles did not block the radio and number of nodes was enough, DSDV had higher packet loss rate and the three routings had relatively low delay time. So DSR and AODV were more suitable for vehicular network. If the obstacles blocked the radio, the three routing routings had high packet loss rate. They needed to further advancement. This study provided a routing research idea for vehicular network and laid a foundation for further research.
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