The Research And Implementation Of Traffic Information Service Access System Based On DTMB

City traffic was influenced deeply by vehicles during the process of urbanization. It is an urgent problem to use existing roads providing traffic convenience for people. Navigation Systems become a way of solving this problem, but navigation systems still have many troubles. At present, navigation systems can be divided into two categories, static navigation and dynamic navigation. Static navigation systems use GIS and GPRS to complete navigation. The navigation effect is not quite good because of lacking real-time traffic information. Dynamic navigation systems add communication modules on static systems; these communication modules include GPRS, VICS and so on, but all these communication modules need large economic investment. To solve these problems, a solution was proposed which is traffic information service system based on DTMB. Real-time traffic information and map data were broadcasted through digital TV channel. Real-time traffic information and map data were received by navigation systems with lowest cost. Dynamic navigation was provided to users in this way. In this paper, the design and implementation of the traffic information service access system was completed, which was the most important part the whole solution, and the following contributions were got:1. Using international standard TPEG to describe and package the real-time traffic information.2. Real-time traffic information was sent to navigation systems through digital TV channels, everyone with a receiver of digital TV can got the information without any pay.3. Based on the real-time traffic information to provide users with dynamic navigation service. It solved the problem that traditional navigation services provided service only considering the distance between points, without considering the road status. It enables users to successfully avoid some sections of traffic-jams and traffic control lines so that users can reach their destinations faster.4. A simple schedule model was used during the schedule of traffic information, after sorting of the information urgency, the information with highest value of urgency was chose and sent, the practicality of whole system was increased with this model.In order to solve the current navigation system's problems, we proposed a solution, designed and implemented the traffic information access system. The results proved that, the access system can handle and push the traffic information efficiently. The paper has a good reference value for the Location-based service relevant research.