Design Of Vehicular Navigation Model For Highway Scene Based On Embedded System

The traditional infrastructure-based networks depend on the existence of an infrastructure or monitoring centre and pay for the communication. However, vehicular ad hoc networks (VANETs) do not require such previous deployment, and hence promise to be more flexible and easily deployable. The paper proposes a design that wireless-capable vehicles spontaneously form a network while traveling on the highway. We choose embedded Linux as the operation system based on S3C2440A, combining GPS location information processing, WiFi network transition, and LCD touch screen.In the hardware, the core-board and the function-board are removable structure. With protel99SE software, we design the function-board, such as circle schematic diagram, PCB layout and drawing the electrical wires. The modules include GPS receiver, WiFi wireless transmission, LCD touch screen, debug module etc.In the software, the program design is based on Qt/Embedded platform for GUI development and is applied multi-thread programming mechanism, to achieve the functions, such as the interface display and click response, GPS location data extraction and analysis, wireless data transceiver processing, video play and so on.Finally, we make detail software tests on three prototypes of the VANET navigation terminals. The results show that the prototype can work stably and get the highly time-critical emergency information in time. Also the LCD touch screen interface timely performs the warning function, real-time displays nearby vehicular information, and clearly plays video. Therefore, the study in the paper is valuable for the application of VANET.