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类型 基础研究 预答辩日期 2018-03-09
开始(开题)日期 2014-11-26 论文结束日期 2017-12-19
地点 李文正楼北512会议室 论文选题来源 国家自然科学基金项目     论文字数 6 (万字)
题目 车载自组织网络连通性及路侧单元部署建模与分析
主题词 车载自组织网络,路侧单元,信息传递延时,网络连通性,出/入口
摘要 车载自组织网络作为智能交通系统的重要组成部分,源于传统的移动自组织网络,是一种专门为车辆间通信而设计的无线自组织网络,目前正受到工业界和学术界越来越高度的重视。车载自组织网络具有高度动态特性和分割特性,这些特性限制了网络中数据发布的实时性和有效性。网络连通性是衡量车载自组织网络动态特性和分割特性的一个关键指标,本论文针对车载自组织网络的连通性问题展开了研究,分别对不同高速公路场景下的网络连通性问题进行了建模和分析。论文的主要工作和创新之处包括以下四个方面: 首先,论文研究了部署路侧单元高速公路场景下的信息传递延时问题,建立了一个理论分析模型来分析和计算事件信息的传递延时。在理论分析模型建立的过程中,假设相邻部署的路侧单元之间不连通,事件信息随机发生在相邻的路侧单元之间,路侧单元通过行驶的车辆节点收集事件信息,并综合考虑车辆节点速度、车辆节点密度、事件信息发生的概率以及相邻路侧单元的部署间距等因素。通过仿真实验结果,验证了理论分析模型的准确性和有效性。对于时限要求严格的应用,当给定信息传递延时要求时,本项工作建立的理论分析模型可以用来估计相邻路侧单元之间允许的最大部署距离,为同样场景下合理部署路侧单元提供理论参考依据。 其次,论文研究了存在单出/入口高速公路场景下的网络连通性问题,通过建立理论分析模型来分析和计算网络的连通概率。在理论分析模型的分析和推导过程中,根据出/入口的位置分布对可能出现的多种情况下的网络连通概率进行了详细分析,综合考虑车辆节点到达率、车辆节点速度、车辆节点通信半径以及车辆节点由第一个道路区间驶入第二个道路区间的通行概率等因素,得出了各种情况发生的概率表达式以及各种情况下的网络连通概率表达式,并使用计算机进行了仿真实验,仿真实验结果验证了所建立的理论分析模型的准确性和有效性。本项工作所建立的理论分析模型可以用于分析同样场景下各种参数对网络连通概率的影响,并为分析存在出/入口的高速公路场景下的其它性能提供参考依据。 然后,论文研究了单出/入口处部署路侧单元高速公路场景下的网络连通性问题,通过建立理论分析模型来分析和计算网络的连通概率。在理论分析模型的建立和推导过程中,根据出/入口位置的分布对各种情况下对应的网络连通概率分别进行了详细地分析,综合考虑车辆节点到达率、车辆节点速度、车辆节点通信半径以及车辆节点由第一个道路区间继续行驶驶入第二个道路区间的通行概率等因素,并使用计算机进行了仿真实验,仿真实验结果验证了所建立的理论分析模型的准确性和有效性。此外,根据建立的理论分析模型,将单出/入口处部署路侧单元场景下的网络连通性结果与单出/入口处未部署路侧单元场景下的网络连通性结果进行了比较,通过比较可以验证如下结论:在出/入口处部署路侧单元可以有效提高网络连通概率。本项工作所建立的理论分析模型可以用于分析同样场景下各种参数对网络连通概率的影响,并为各种不同道路场景下确定路侧单元的部署位置提供了参考依据。 最后,论文研究了存在单出/入口且部署了多个路侧单元的高速公路场景下的网络连通性问题,通过建立理论分析模型来分析和计算网络的连通概率。在理论分析模型的分析和推导过程中,将整个高速公路道路区间划分成多个子区间,假设每个子区间的两端均部署有路侧单元,对每个子区间分别进行连通性分析,尤其是针对存在出/入口的子区间上的车辆节点连通情况进行详细分析,推导出每个子区间的连通概率表达式和整个网络的连通概率表达式。通过仿真实验结果验证了推导出的理论分析模型的准确性和有效性。根据建立的理论分析模型,将存在单出/入口且部署多个路侧单元的高速公路场景下的网络连通性结果与存在单出/入口但未部署路侧单元的高速公路场景下的网络连通性结果进行了比较,验证了如下结论:在存在单出/入口的高速公路上部署多个路侧单元能提高网络的连通概率。在实际应用中相同的场景下,本项工作所建立的理论分析模型可以用于分析同样场景下各种参数对网络连通概率的影响,当给定网络连通概率要求时,该理论分析模型能为不同的道路场景下确定路侧单元的部署数目提供参考依据。
英文题目 MODELING AND ANALYSIS OF NETWORK CONNECTIVITY AND ROADSIDE UNIT DEPLOYMENT FOR VEHICULAR ADHOC NETWORKS
英文主题词 vehicular ad hoc network, roadside unit, information delivery delay, network connectivity, entry/exit
英文摘要 Vehicular Ad Hoc Networks (VANETs) are currently receiving more and more attention from both industry and academia. As part of an Intelligent Transportation System (ITS), a VANET originates from traditional Mobile Ad Hoc Networks (MANETs) and is a special type of MANET designed particularly for communication between vehicles. . A VANET has a highly dynamic characteristic, which limits the timeliness and efficiency of data disseminartion. Network connectivity is an important metric for measuring the highly dynamic characteristic of a VANET. This dissertation studies the network connectivity problem in VANETs and focuses on the modeling and analysis of network connectivity in different highway road scenarios. The main work and contributions of this dissertation including the following four aspects: Firstly, the information delivery delay in ahighway road scenario with roadside units (RSUs) is studied and a theoretical analysis model is established for analyzing and calculating the incident information delivery delay. In establishing the model, it is assumed that the neighboring RSUs are disconnected and an incident randomly occurs between two neighboring RSUs. The incident information is collected by passing vehicles. The model takes into account the vehicle driving speed, the vehilce density on the road, the probability that an incident occurs and the distance between two neighboring RSUs. The accuracy and effectiveness of the theoretical analysis model are verified throughsimulation results. The derived theoretical analysis model can be used to estimate the maximum deployment distance allowed between two neighbor RSUs under a given delay constraint for time-critical applications, which can provide a reference for the RSU deployment in such scenarios. Secondly, the network connectivity in a highway road scenario with oneone entry/exit is studied and a theoretical analysis model is established for analyzing and calculating the network connectivity probablity. In establishing the model, the network connectivity probability is analyzed according to the distribution of the entry/exit location on the highway road, and a closed loop formula of the network connectivity probability in each case is derived, taking into account the vehicle arrival rate, the vehicle moving speed, the vehicle communication radius and the probability that a vehilce drives through the entry/exit. The accuracy and effectiveness of the theoretical analysis model are verified through simulation results. The derived theoretical analysis model can be used to analyze the impacts of major parameters on the network connectivity in such scenarios, and provide a reference for analyzing other network performance in highway scenarios with entries/exits. Then, the network connectivity in a highway road scenario with one entry/exit and one RSU deployed at the entry/exit is studied and a theoretical analysis model is established for analyzing and calculating the network connectivity probability. In establishing the model, the network connectivity probability is analyzed according to the distribution of the entry/exit location on the highway road, and a closed loop formula of the network probability in each case is derived,taking into account the vehicle arrival rate, the vehicle moving speed, the vehicle communication radius and the probability that a vehilce drives through the entry/exit. The accuracy and the effectiveness of the theoretical analysis model are verified through simulation results. Based on the derived theoretical analysis model, a comparision between the scenario with one RSU deployed at the entry/exit and that with no RSU deployed at the entry/exit is presented in terms of the network connectivity probability. It is demonstrated that the deployment of an RSU at the entry/exit can improve the network connectivity. The derived theoretical analysis model can be used to analyze the impacts of major parameters on the network connectivity in such scenarios, and provide a reference for determining the deploymentpositions of RSUs in different highway scenarios. Finally, the network connectivity in a higway raod scenario with one entry/exit multiple RSUs deployed on the highway road is studied, and a theoretical analysis model is established for analyzing and calculating the network connectivity probability. In establishing the model, the highway road is divided into several sub-segments, each with two RSUs deployed at both ends, respectively. The network connectivity of each sub-segment is analyzed and a formula of the connectivity probability on each sub-segment is derived. The network connectivity probability on the overall highway road is then derived based on the connectivity probability on each sub-segment. The accuracy and effectiveness of the theoretical analysis model are verified through simulation results. Based on the derived theoretical analysis model, a comparison between the scenario with no RSU deployed and that with multiple RSUs deployed on the highway road is presented. It is demonstrated that the deploying multiple RSUs on the highway road can improve the network connectivity. The derived theoretical analysis model can be used to analyze the impacts of major parameters on the network connectivity in such scenarios, and provide a reference for determining the number of RSUs to be deployed in different highway scenarios.
学术讨论
主办单位时间地点报告人报告主题
东南大学移动通信国家重点实验室 2012.09.06 无线谷1319会议室 王玉 带有负顾客和优先权的排队系统分析
东南大学移动通信国家重点实验室 2014.03.06 无线谷1319会议室 王玉 车辆协助间歇连通路侧单元通信网络延迟性能分析
东南大学移动通信国家重点实验室 2014.09.11 无线谷1319会议室 王玉 ON-OFF scheduling in energy efficient VANETs with multiple roadside units
东南大学移动通信国家重点实验室 2014.09.18 无线谷1319会议室 王玉 RSU ON-OFF scheduling with global optimization algorithm
东南大学移动通信国家重点实验室 2012.03.20 李文正楼北512会议室 Jianping Pan Geometrical Probability and Wireless Networks
东南大学移动通信国家重点实验室 2012.07.16 榴园宾馆逸夫报告厅 Guoliang Xue Resource allocation games in cooperative networks
东南大学移动通信国家重点实验室 2013.07.01 榴园宾馆逸夫报告厅 Victor O. K. Li Can information and communication technologies save the environment
东南大学移动通信国家重点实验室 2015.10.17 无线谷1306会议室 Cheng Li Energy-efficient coordination schemes for underwater acoustic sensor networks
     
学术会议
会议名称时间地点本人报告本人报告题目
GLOBECOM-IEEE 2014.12.08-2012.12.12 Austin, USA Delivery delay analysis for roadside unit deployment in intermittently connected VANETs
ICC-IEEE 2016.05.23-2016.05.27 Kuala Lumpur, Malaysia A connectivity analytical model for a highway with an entrance/exit in vehicular Ad Hoc networks
     
代表作
论文名称
Delivery delay analysis for roadside unit deployment in vehicular Ad hoc networks with intermittent
A Connectivity Analytical Model for a Highway with an Entrance/Exit in Vehicular AdHoc Networks
 
答辩委员会组成信息
姓名职称导师类别工作单位是否主席备注
张顺颐 正高 教授 博导 南京邮电大学
王海 正高 教授 博导 陆军工程大学
沈连丰 正高 教授 博导 东南大学
宋铁成 正高 教授 博导 东南大学
徐平平 正高 教授 博导 东南大学
      
答辩秘书信息
姓名职称工作单位备注
张源 副高 副教授 东南大学