车辆导航系统高速检索技术研究-《计算机技术与发展》

文章信息/Info

Author(s):: SUN Ming-mei; ZHANG Dai-yuan; Coll.of Computer,Nanjing Univ.of Posts and Telecommunications

Keywords:: vehicle navigation system; data of regional information; R-tree data structure; high-speed data retrieval

摘要:: 在车辆安全行驶中,危险区域与慢速行驶区域的自动检测是最为关键的问题,也是安全行驶的基本保证。传统方法通过卫星通讯将危险区域与慢速行驶区域信息发送到外出车辆,不仅应答速度较慢,并且数据在通信过程中存在风险。文中研究并提出了一种在车辆导航系统内部实现的高速数据检索技术,将区域数据压缩保存在车辆导航设备,以R树数据结构压缩保存实现区域数据的本地查询,这样数据库内容保存在车辆本身固件中,车辆导航系统每次检索只从服务器端更新数据库内容,使得检索可以在车辆内部实现,从而提高了检索效率,具有良好的实用价值

Abstract:: In the safe driving of the vehicle,automatic detection of the danger zone and slow moving area is the most critical issue,but also the basic guarantee for safe driving.Traditional methods sent information of hazardous area and slow moving zone through satellite communication to vehicles out,it is not only have a slow response,and the data in the communication process are at risk.In this paper,present a navigation system within the vehicle to achieve high-speed data retrieval technology,data what are compressed and stored in the vehicle navigation equipment,in order to achieve local search by compressing using R-tree data structure,by this way the content of the database can be storded in the vehicle itself,each search of the vehicle navigation system can update the database content from the server-side,search can be achieved in the vehicle itself,thereby enhancing the retrieval efficiency,so it has a very good value