摘要
车载Ad hoc网络是专用自组织网络中研究和应用最为活跃的领域,其中如何实现车辆节点的Internet接入,进行车载Ad hoc网络网关的研究十分必要。主要分析了网关发现策略中主动式的网关发现机制,对主动网关发现机制现存的问题进行了分析。同时针对车载Ad hoc网络的特殊性以及主动网关发现中链路双向通信建立时间过长、负载过大的问题,设计了一种新型的网关发现策略R-AODVPlus,并对该算法提出了路由开销计算模型。基于NS-2的仿真结果表明,新的网关发现机制R-AODVPlus在时延和路由开销两个重要的性能指标上均有明显改善。
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-AOD- VPlus, 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.
出处
《计算机应用研究》
CSCD
北大核心
2012年第8期3085-3087,3095,共4页
Application Research of Computers
基金
国家自然科学基金资助项目(61070182
60873192)
