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首页> 外文期刊>Intelligent Transportation Systems, IEEE Transactions on >Stochastic Analysis of a Single-Hop Communication Link in Vehicular Ad Hoc Networks
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Stochastic Analysis of a Single-Hop Communication Link in Vehicular Ad Hoc Networks

机译：车载Ad Hoc网络中单跳通信链路的随机分析

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摘要

A vehicular ad hoc network (VANET) is a promising addition to our future intelligent transportation systems, which supports various safety and infotainment applications. The high node mobility and frequent topology changes in VANETs impose new challenges in maintaining a long-lasting connection between network nodes. As a result, the lifetime of communication links is a crucial issue in VANET development and operation. This paper presents a probabilistic analysis of the communication link in VANETs for three vehicle density ranges. First, we present the stationary distribution of the communication link length using mesoscopic mobility models. Second, we propose a stochastic microscopic mobility model that captures time variations of intervehicle distances (distance headways). A discrete-time finite-state Markov chain with state-dependent transition probabilities is proposed to model the distance headway. Third, the proposed stochastic microscopic model and first passage time analysis are used to derive the probability distribution of the communication link lifetime. Numerical results are presented to evaluate the proposed model, which demonstrate a close agreement between analytical and simulation results.
机译：车载自组织网络（VANET）是我们未来的智能交通系统的有希望的补充，该系统支持各种安全和信息娱乐应用。 VANET中的高节点移动性和频繁的拓扑更改对维持网络节点之间的持久连接提出了新的挑战。因此，通信链接的寿命是VANET开发和运营中的关键问题。本文针对三个车辆密度范围的VANET中的通信链路进行了概率分析。首先，我们使用介观移动性模型介绍通信链路长度的平稳分布。其次，我们提出了一个随机的微观流动性模型，该模型捕获了车辆之间距离（​​车头距离）的时间变化。提出了具有状态依赖转移概率的离散时间有限状态马尔可夫链，以对距离进行建模。第三，使用所提出的随机微观模型和首次通过时间分析来得出通信链路寿命的概率分布。数值结果表明了该模型的正确性，证明了分析结果与仿真结果的吻合。

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