Novel gateway discovery mechanism in VANET
车载Ad hoc网络网关发现机制的改进

Vehicular Ad hoc network VANET is one of the most widely-used self-organization networks both in research and applications. However, it is imperative to investigate the gateway discovery mechanism in VANET for credible access to Internet. This paper analyzed the existing problems on active gateway discovery protocol. Moreover, considering the long establishment-time and heavy load in bidirectional link communications, it proposed a novel gateway discovery strategy called R-AODVPlus, and also designed the corresponding calculation model for routing overhead. Simulation results in NS2 demonstrate great improvements in the two critical metrics of delay and routing overhead.