智能交通车路协同系统数据交互方式设计与验证

发布时间：2018-04-06 01:20

本文选题：车路协同　切入点：信息交互　出处：《北京交通大学》2014年硕士论文

【摘要】：随着智能交通方向研究的深入,越来越多的研究成果表明智能的车路协同一体化系统将有效的提高道路安全水平和公路交通运输效率。车路协同系统利用信息处理、定位导航、通信、电子传感、人工智能、计算机等众多技术来获取车辆和道路信息。系统通过出行人、智能路侧单元和智能车载单元间的双向、实时和高效的信息交互,充分体现人.车.路的有效协同。车路协同系统在全时空的动态的交通信息采集和融合的基础上开展行驶车辆主动安全控制和道路的协同管理,为出行人提供全时空的、可靠的交通信息。在实现人.车.路充分协同的同时,达到最优化的利用系统资源、提高主动道路交通安全、缓解交通拥挤的目标,形成安全、环保、高效的道路交通系统。本论文在总结和分析车路协同系统技术国内外研究情况的基础上,明确车路／车车之间的通信内容、应用数据的优先级、业务的传输时延、业务的丢包率、业务的连续中断时间等通信性能要求,并结合车路协同系统的主要通信指标设计适合我国智能交通发展现状的车路协同系统各子系统之间的数据交互标准。论文选取了形式化验证工具SPIN的图形化界面ISPIN来对本文从应用层设计的数据交互过程进行验证和分析,检验本文设计的数据交互过程是否能保证车路协同系统各个实体之间通信的及时性、正确性和可靠性要求,验证其是否为正确并且安全的通信过程。论文在明确车路协同系统各个实体间通信内容的基础上,通过研究分析MAC层消息的传输机制,并结合我国车路协同研究发展的现状,找到合理可行的改进措施提升事件驱动式消息的发送优先级,提高事件驱动式消息发送的竞争信道公平性,最终改善消息的业务质量(Quality of Service, QoS)指标。最后,通过网络仿真工具建模河北廊坊实际车路协同系统试验基地的不同车辆自组织网络(Vehicular Ad-hoc Network, VANET)场景,仿真不同类型消息的发送,并仿真为同一种消息应用不同的MAC层接入方式,验证论文所作的改进是否有效地提升了事件驱动式消息的传输优先级,是否有效地改善了安全相关消息传输的通信指标,得到仿真结果并分析给出结论。
[Abstract]:With the development of intelligent transportation research, more and more research results show that the intelligent vehicle-road collaborative integration system will effectively improve the level of road safety and road transportation efficiency.The vehicle-road cooperative system uses many technologies, such as information processing, positioning and navigation, communication, electronic sensing, artificial intelligence, computer and so on, to obtain vehicle and road information.Through the two-way, real-time and efficient information interaction between the traveller, the intelligent road-side unit and the intelligent vehicle unit, the system fully embodies the human.Car.Effective coordination of roads.Based on the dynamic traffic information collection and fusion of the whole time and space, the vehicle-road cooperative system carries out the active safety control of the driving vehicle and the cooperative management of the road, which provides all the space-time and reliable traffic information for the traveller.In the realization of human beings.Car.At the same time, we can make the best use of system resources, improve the active road traffic safety, alleviate the traffic congestion, and form a safe, environmental protection and efficient road traffic system.On the basis of summing up and analyzing the domestic and international research situation of vehicle-road cooperative system technology, this paper clarifies the communication content between vehicle and vehicle, the priority of application data, the transmission delay of service, the rate of packet loss.The communication performance requirements such as continuous interruption time of service and the main communication indexes of the vehicle-road cooperative system are combined to design the data exchange standard among the subsystems of the vehicle-road cooperative system which is suitable for the development of intelligent transportation in China.In this paper, the graphical interface ISPIN of formal verification tool SPIN is selected to verify and analyze the data interaction process designed from the application layer.To verify whether the data interaction process designed in this paper can ensure the timeliness, correctness and reliability of the communication between the entities of the vehicle-route coordination system, and to verify whether it is a correct and secure communication process.On the basis of defining the communication content among the entities of the vehicle-road coordination system, this paper analyzes the mechanism of message transmission in the MAC layer, and combines the current situation of the research and development of the vehicle-road coordination system in China.Some reasonable and feasible improvement measures are found to improve the priority of event-driven message, improve the fairness of the competing channel of event-driven message, and improve the quality of service (QoS) index.Finally, using the network simulation tool to model the different vehicle Ad-hoc network (VANET) scene of the actual vehicle-road collaborative system test base in Langfang, Hebei Province, to simulate the sending of different types of messages.Different MAC layer access methods are applied to the same message, which verifies whether the improvement in this paper has effectively raised the priority of event driven message transmission and improved the communication index of security related message transmission.The simulation results are obtained and the conclusion is given.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495

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