本文選題：車路協(xié)同　切入點：信息交互　出處：《北京交通大學》2014年碩士論文

【摘要】：隨著智能交通方向研究的深入,越來越多的研究成果表明智能的車路協(xié)同一體化系統(tǒng)將有效的提高道路安全水平和公路交通運輸效率。車路協(xié)同系統(tǒng)利用信息處理、定位導航、通信、電子傳感、人工智能、計算機等眾多技術(shù)來獲取車輛和道路信息。系統(tǒng)通過出行人、智能路側(cè)單元和智能車載單元間的雙向、實時和高效的信息交互,充分體現(xiàn)人.車.路的有效協(xié)同。車路協(xié)同系統(tǒng)在全時空的動態(tài)的交通信息采集和融合的基礎上開展行駛車輛主動安全控制和道路的協(xié)同管理,為出行人提供全時空的、可靠的交通信息。在實現(xiàn)人.車.路充分協(xié)同的同時,達到最優(yōu)化的利用系統(tǒng)資源、提高主動道路交通安全、緩解交通擁擠的目標,形成安全、環(huán)保、高效的道路交通系統(tǒng)。 本論文在總結(jié)和分析車路協(xié)同系統(tǒng)技術(shù)國內(nèi)外研究情況的基礎上,明確車路／車車之間的通信內(nèi)容、應用數(shù)據(jù)的優(yōu)先級、業(yè)務的傳輸時延、業(yè)務的丟包率、業(yè)務的連續(xù)中斷時間等通信性能要求,并結(jié)合車路協(xié)同系統(tǒng)的主要通信指標設計適合我國智能交通發(fā)展現(xiàn)狀的車路協(xié)同系統(tǒng)各子系統(tǒng)之間的數(shù)據(jù)交互標準。 論文選取了形式化驗證工具SPIN的圖形化界面ISPIN來對本文從應用層設計的數(shù)據(jù)交互過程進行驗證和分析,檢驗本文設計的數(shù)據(jù)交互過程是否能保證車路協(xié)同系統(tǒng)各個實體之間通信的及時性、正確性和可靠性要求,驗證其是否為正確并且安全的通信過程。 論文在明確車路協(xié)同系統(tǒng)各個實體間通信內(nèi)容的基礎上,通過研究分析MAC層消息的傳輸機制,并結(jié)合我國車路協(xié)同研究發(fā)展的現(xiàn)狀,找到合理可行的改進措施提升事件驅(qū)動式消息的發(fā)送優(yōu)先級,提高事件驅(qū)動式消息發(fā)送的競爭信道公平性,最終改善消息的業(yè)務質(zhì)量(Quality of Service, QoS)指標。 最后,通過網(wǎng)絡仿真工具建模河北廊坊實際車路協(xié)同系統(tǒng)試驗基地的不同車輛自組織網(wǎng)絡(Vehicular Ad-hoc Network, VANET)場景,仿真不同類型消息的發(fā)送,并仿真為同一種消息應用不同的MAC層接入方式,驗證論文所作的改進是否有效地提升了事件驅(qū)動式消息的傳輸優(yōu)先級,是否有效地改善了安全相關消息傳輸?shù)耐ㄐ胖笜?得到仿真結(jié)果并分析給出結(jié)論。
[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.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U495

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本文編號：1717335