VANETs网络移动模型的度量标准分类与评价

Classification and Evaluation of Mobility Metrics for Mobility Model in VANETs

车载物联网是一种自组织、结构开放的车辆间通信网络,是一种特殊的移动Ad Hoc网络,可以适应不断变化的网络拓扑结构,为道路车辆之间、车辆与路边固定设备之间提供通信。归纳了评价移动模型的关键参数,将其评价度量标准分为移动性判据和连通性判据2种。应用MobiSim,以车载物联网常用的2种移动模型(即高速公路模型和曼哈顿模型)为例,分析评价了车载物联网中移动模型的两类度量标准,得出两类移动模型下移动性判据和连通性判据指标与设置的各参数之间的变化关系。

Objective A vehicle Ad Hoc network is collection of self-configuring and adaption of wireless link between communicating devices(vehicle mobile devices),which is a special mobile Ad Hoc network.It adapts the changing network topologies and provides communication of cars and road accesses.Methods The key parameters for evaluating the mobility model were summarized,and the evaluation criteria are divided into mobility criterion and connectivity criterion.With MobiSim simulation software,and taking two commonly used mobile models under VANETs(i.e.highway model and Manhattan model)as examples,two kinds of metrics of mobile models in VANETs network were analyzed and evaluated.Results and conclusion The results showed the relationship between the mobility criterion,connectivity criterion index and the set parameters in the two kinds of mobile models.