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在车载Ad hoc网络中,节点的高速移动导致全网拓扑的频繁变化,以街道为单位的路由策略更加高效。传统的研究中使用街道的静态信息或者瞬时的动态信息选择路由路径。前者忽略了车辆节点的动态分布,后者中,精确的全局动态信息获取困难且开销巨大。文章提出街道转发能力来评估街道的路由特性,并预测其持续时间。基于街道转发能力的预测,本文设计了结合静态长度和动态信息的路由策略。仿真结果表明,本策略可以显著提高路由性能。
In the vehicle Ad hoc network, the high-speed movement of nodes leads to frequent changes in the topology of the whole network. The routing strategy based on the streets is more efficient. In the traditional research, the static information of the street or the transient dynamic information is used to select the routing path. The former ignores the dynamic distribution of vehicle nodes, the latter, the acquisition of accurate global dynamic information difficult and costly. The article proposes street forwarding capabilities to assess the routing characteristics of a street and predict its duration. Based on the prediction of street forwarding ability, this paper designs a routing strategy combining static length and dynamic information. Simulation results show that this strategy can significantly improve the routing performance.