车辆导航系统增量数据在线交换平台设计

Design of Online Exchange Platform for Incremental Data in Vehicle Navigation System

本文中提出了一种在车辆导航系统中用于实时更新导航数据而进行增量数据在线交换的平台,并针对数据的更新设计了导航地点和路线的增量数据的交换机制。该平台以中心-终端交换式平台为基础,结合GPRS和FTP技术,实现了在车载导航设备与数据源服务器之间的在线数据交换。在此基础上,采用终端请求模式,针对增量数据的请求、回复和文件传输分别设计了相应的数据交换机制。最后通过增量数据在线交换试验,验证了该平台的可靠性与实时性。

In this paper,an online exchange platform of incremental data for the realtime updating of navigation data in vehicle navigation system is proposed,and the exchange mechanism of incremental data of navigation poins of interest and route is designed for data updating. Based on the center-terminal exchange platform and com-bined with the technologies of general packet radio service and file transfer protocol, the platform achieves the online data exchange between on-board navigation device and data source server. On this basis and by adopting terminal request mode,the corresponding data exchange mechanisms are designed for the request, reply and message trans-mission of incremental data respectively. Fianally,an online exchange test of incremental data verifies the reliability and realtime performance of the platform.