In-Vehicle Navigation System Under Grid Environment

Today's navigation system needs more powerful information center to process enormous distributed and heterogeneous traffic information. In order to grasp the traffic situation of the whole city, the combination mechanism for combining all distributing high-powered resources of data storing, computing, analyzing and decision-making, and consequently, all isolated data resources that currently exist should be recombined. As the production of high-powered computing and fast development of Internet technology, Grid is thought to have many features that like traffic aspect, such as geography distributing, resource heterogeneity, zone self-government, interior collaboration, etc. The initial thought of Shanghai Traffic Information Grid is just based on those features of Grid. It chooses Grid to be the supporting platform of intelligent traffic system. So it solves many problems which traditional traffic system cannot solve or cannot solve effectively.This paper presents a traffic information demonstration system implemented on Embedded Linux in the environment of Traffic Information Grid. Supported by powerful background Grid Services, this system provides the end users with services such as fetching, displaying, analyzing and outputting traffic information, especially dynamic and real-time traffic information. Integrating modern Grid Technology, this system can offer dynamic or real-time information services, such as real time traffic status and dynamic shortest path scheme, which overcomes the limitation of traditional navigation systems.This paper explicitly introduces the design and implementation of our in-vehicle navigation system. Firstly, it introduces some key theoretical basement of system development, including basic content of Embedded Linux, working mechanism of MiniGUI, the principle of Bluetooth and so on. Based on these theories, this paper introduces the system's hardware architecture, and does some research of Linux kernel porting and some device drivers developing. After the buildup of hardware, OS and drivers, we discussed the design of our navigation system, from the system'ssoftware architecture, key technologies and the communication mechanism with background Grid platform. At last we present the test result and some pictures for demonstration, and simply discuss further jobs that need to be done.