城市场景下车载自组网消息传递及行车安全预警模拟

发布时间：2018-11-25 09:21

【摘要】：随着社会经济的快速发展，机动化水平的逐渐提高，，城市交通拥堵状况以及交通安全事故频发成为了亟待解决的问题，由此诞生了智能交通系统ξITSο，而车载自组织网络在智能交通系统中具有举足轻重的地位作为车载自组网重要的应用场景之一，城市场景下的车载自组网由于城市中道路结构，车辆密度，障碍物等因素显现出了一些独有的特征本文对城市场景下的车载自组织网络消息传递最短路径以及车辆之间安全距离进行了研究主要研究工作包括：第一基于城市场景道路网结构的特点，车辆在城市道路中的行驶特征提出了消息传递沿道路方向的思路以处于路口的车辆及基础设施作为研究对象，设计了适用于城市场景的车载自组织网络消息传递策略，使用图论中的Dijkstra算法求得城市中心地段车载自组网消息传递最短路径第二基于现有车载自组织网络移动模型自定义了适用于城市场景的车辆移动模型针对城市场景下行车安全问题研究了城市中各场景下的行车安全距离，在现有行车安全距离模型的基础上进行调整和延伸，推导出了适用于各场景的行车安全距离计算模型第三基于车间安全距离提出了预警距离的概念，并用MATLAB对不同场景的车辆行驶过程进行了模拟，分析了预警距离对于最大限度防止车辆发生碰撞的重要意义
[Abstract]:With the rapid development of social economy and the gradual improvement of motorization level, urban traffic congestion and frequent traffic safety accidents have become an urgent problem to be solved. As a result, Intelligent Transportation system 尉 ITS is born. As one of the most important application scenarios of vehicular ad hoc networks, vehicular ad hoc networks in urban environments are characterized by the density of vehicles due to the structure of roads in the city, which plays an important role in the intelligent transportation system (its). Obstacles and other factors show some unique characteristics. This paper studies the shortest path of the vehicle-borne ad hoc network messaging and the safety distance between vehicles under the urban scene. The main research work includes: first, based on the city Characteristics of Road Network structure in Market View, The driving characteristics of vehicles in urban roads the idea of message passing along the road direction is put forward. The vehicle and infrastructure at the intersection are taken as the research objects, and a vehicle-borne ad hoc network messaging strategy suitable for urban scenes is designed. Using Dijkstra algorithm in Graph Theory to find the shortest path of message delivery in Urban Central vehicle Ad Hoc Network second based on the existing vehicle-mounted ad hoc network mobile model, the vehicle mobility model suitable for urban scene is customized for the city market. The problem of traffic safety in the scene is studied in this paper, and the distance of driving safety in every scene of the city is studied. On the basis of adjustment and extension of the existing traffic safety distance model, the calculation model of traffic safety distance suitable for each scene is derived. Thirdly, the concept of early warning distance is proposed based on workshop safety distance. The vehicle driving process in different scene is simulated by MATLAB, and the significance of warning distance to prevent vehicle collision is analyzed.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;U463.67

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