Reserarch On Unified Forwarding System Based On Bus Vehicke Real-time Data

With the rapid development of the urbanization in China,the prediction demand of the public transit for the travelers gradually steps up.The enterprises pay more and more attention to the accuracy of the vehicle-carried data.The vehicle-carried data transmission and reception system used by the public transportation enterprise in Beijing in this paper cannot meet the current requirements for the accuracy,the safety and the timeliness.For this purpose,a unified transmit system for the real-time bus data combined with the computer technology is established to realize the real-time analysis,the standardized conversion,the refined authorization,the application semantic release and other functions of the uploaded real-time vehicle data.This paper mainly introduces the design and implementations of a unified transmit system for real-time bus data.Firstly,through the analysis of the existing GPS vehicle monitoring systems and the application requirements,the functional and performance requirements of the system are determined.Secondly,the system is divided into the real-time bus data unified transmit platform and the communication access transmit platform.Furthermore,a C/S multi-layer architecture is built on the application server.At last,the database design and the data model design are briefly introduced.The system is based on the.NET platform,using C# language,combined with SQLserver2008,MSMQ,SDN,JSON and other technologies.The implementation of the system is detailed illustrate by a series of flowcharts and the system screenshots.The data model is one of the difficulties in the design process.The proper data definition,the complete metadata description and the better supporting on operation and extension are addressed.Another difficulty is to define the network technology with software.The project does not select the traditional load balancing technology to deal with the data flow.The programmable way is used to centralize the network function control and distribute data files reasonably.The system designed and analyzed in this paper meets the requirements of a unified transmit system for real-time bus data.In the application by a public transportation enterprise in Beijing,the system provides the practical data support for the intelligent bus scheduling,the bus safety monitoring,the vehicle maintenance,the driver behavior analysis and other operation activities.