An analytical model of multihop connectivity of inter-vehicle communication systems
An analytical model of multihop connectivity of inter-vehicle communication systems
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DOI：
10.1109/twc.2010.01.05545
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发表时间：
2010
影响因子：
10.4
通讯作者：
W. Jin;W. Recker
中科院分区：
文献类型：
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作者：
W. Jin;W. Recker
利用无线通信设备的激增，我们可以很好地开发基于车辆间通信（IVC）的先进交通信息系统，其中驾驶员可以对事故做出更快的响应，并能够在灾难发生后传达关键信息。这种IVC系统的可行性与多跳连接的性能密切相关。现有的多跳连接的分析研究，但是，通常假设泊松分布的通信节点或均匀分布的车辆在道路上，基于仿真的研究是不适合实时应用的计算成本高的交通模拟器。在本文中，我们提出了一个分析模型的多跳连接的IVC在交通流中，车辆的位置都是已知的，通过观察，交通模拟器，或交通理论。在介绍了最转发范围内的通信链和节点和节点相关的事件后，我们推导出一个递归模型的节点和跳概率，并进一步定义了一些多跳连接的性能指标。然后，我们应用该模型研究了均匀和非均匀流量下IVC的多跳连通性，得到了与文献一致的结果。新的分析模型高效，无需重复交通模拟，同时能够捕捉车辆任意分布模式的影响。因此，它是适合于不同的交通拥堵模式的IVC的连通性评估和扩展的研究其他情况。
Taking advantage of the proliferation of wireless communication devices, we could well develop advanced transportation information systems based on inter-vehicle communication (IVC), in which drivers can have faster response to incidents and are able to communicate critical information in wake of disasters. Whether such IVC systems are feasible or not is highly related to the performance of multihop connectivity. Existing analytical studies of multihop connectivity, however, usually assume Poisson distribution of communication nodes or uniform distribution of vehicles on a road, and simulation-based studies are not suitable for real-time applications with computationally costly traffic simulators. In this paper, we present an analytical model for multihop connectivity of IVC in a traffic stream, in which positions of vehicles are all known through observations, traffic simulators, or traffic theories. After introducing most-forwarded-within-range communication chains and node- and hope-related events, we derive a recursive model of node and hop probabilities and further define a number of performance measures of multihop connectivity. We then apply the model to study multihop connectivity of IVC in both uniform and non-uniform traffic and obtain results consistent with those in literature. The new analytical model is efficient without repeating traffic simulations while capable of capturing the impact of arbitrary distribution patterns of vehicles. Thus it is suitable for evaluating connectivity of IVC for different traffic congestion patterns and extended for studies of other situations.