The Development Of Public Traffic Management System And Electronic Station Board Based On Wireless Token

Public traffic management system is mainly composed of the management center, the electronic station board, the bus terminal. It utilizes many kinds of information technologies such as wireless communication, computer control technology, GIS technology and database. The bus, the waiting passenger, the electronic station board and the management center unifies in together, it provides the real-time information for the coming bus and the practical information service, such as public transportation management, the weather forecast and the government announcement information, greatly enhancing the public transportation operation efficiency and the management level.A way of design is brought forward about public traffic management system based on wireless token in this paper, compared to some advantages and disadvantages of researching public traffic networks. The system based on radio transportation realizes wireless data switch between the bus and the electronic station board, and between the electronic station board and the management center, it needn't apply special network, but constitutes network and setup communication protocol by itself, so that the cost about communication of data can be decreased at large, and makes the construction of system become simple. In this system the wireless token ring and TDM were used for avoiding the same frequency's disturbance and have assured only one wireless terminal made use of channel in the fixed area.This paper mainly completes the construction of system's communication network, the software and hardware design of electronic station board, and the software development of management center. The part of communication network accomplishes composition of system, the way of data collection and transmission, the establishment of communication proctocol and error control technology on wireless communication. The part of electronic station board accomplishes the display and data processing function by hardware design based on microcontroller and programmed by C language. The software development of management center is started from the analysis of system requirement, through MapX control in the environment of VC and combines with GIS and database technology, the system realizes intelligent management of bus, information query, statistical analysis and display function.