Design And Verification Of Intelligent Transportation Informatin Service System Based On LoRaWAN

As an important part of intelligent transportation construction,intelligent transportation information service system can provide more comprehensive transportation information services for travel,and facilitate travellers and managers to grasp transportation information in real time and accurately.However,the existing traffic information service mechanism cannot meet the needs of the rapidly developing social society,and there are problems such as single service and low level of intelligent service.Therefore,this paper establishes an intelligent traffic information service system based on LoRaWAN wireless communication protocol.The system can intelligently complete the traffic data information from the underlying sensor network,process and analyze the traffic data through the central controller,finally,the traffic information is released on web.The users will be able to obtain the real-time traffic information,which improves the traffic efficiency significantly.The main contributions of this paper can be summarized as follows:(1)Propose the three-layer design architecture of the intelligent traffic information network service system based on LoRaWAN wireless communication: It includes the sensing layer of bottom data collection,the transmission control layer of data information transmission.The data acquisition network is formed by constructing sensors in the road,environment and parking lot in the urban traffic environment.The designed data collection network aggregates the data information into the central server layer through LoRa wireless communication in the system to form cloud data;The server processes and analyzes the traffic data information;finally,the application layer publishes the traffic data information.(2)Realize the design of each layer of the intelligent traffic information service system and completed the construction of the traffic information service system platform.In the process of constructing the traffic information service system platform,different information collection terminals were designed for different traffic scenarios.Secondly,the LoRaWAN wireless network networking design was completed to realize the wireless forwarding of traffic data information.Finally,the traffic information service was designed.The central server and front-end information publishing interface of the system can process and analyze the original traffic data in the server,and real-time release of the traffic data information in the front-end information publishing interface.(3)Realize the intelligent parking guidance in the intelligent traffic information service system,based on the comprehensive consideration of the subjective judgment and objective judgment of the traveler,the selection of the optimal parking space of the intelligent parking lot service module and the route guidance to the parking space are realized;The road traffic efficiency of the intelligent traffic information service system is improved.Based on the traffic data of the city intersection in the intelligent traffic information service system,the control model that optimizes the traffic signal in real time by establishing the number of vehicles stranded at the intersection is established.The genetic algorithm is used to optimize the simulation of the green light timing of the traffic lights in the model,which reduces the number of vehicles stranded at the intersection and improves the traffic efficiency at the intersection.