关键词: 车载自组织网络, 连通性, 衰落信道模型, 确定信道模型, 时间相关性

Abstract: Taking the number of isolated nodes, the maximum connectivity length, the global network efficiency and other parameters as quantitative indicators to evaluate connectivity, the Vehicular Ad-hoc Networks（VANETs） is established by VanetMobisim and the evolution of VANETs connectivity is studied under the Nakagami fading channel model and deterministic channel model in detail. As the results show, the temporal correlation of networks is weak when VANETs is fully connected. When the connectivity of VANETs is low, all the connectivity indexes present heavy-tailed phenomenon and the network connectivity has a strong temporal correlation. Finally, the influence on the connectivity of VANETs is analysed led by the nodes density, path loss index and fading factor etc.

Key words: vehicular ad hoc networks, connectivity, fading channel model, deterministic channel model, temporal correlation