计算机科学与探索 ›› 2010, Vol. 4 ›› Issue (1): 64-72.DOI: 10.3778/j.issn.1673-9418.2010.01.007

• 学术研究 • 上一篇    下一篇

利用覆盖区域设计与实现移动对象索引

王波涛1+,陈 贺1,马 俊1,喜连川 优2,王国仁1   

  1. 1. 东北大学 信息科学与工程学院,沈阳 110004
    2. 东京大学 生产技术研究所,东京 153-8505
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-01-15 发布日期:2010-01-15
  • 通讯作者: 王波涛

Design and Implementation of Mobile Object Index Based on Covered Area

WANG Botao1+, CHEN He1, MA Jun1, KITSUREGAWA Masaru2, WANG Guoren1   

  1. 1. College of Information Science and Engineering, Northeastern University, Shenyang 110004, China
    2. Institute of Industrial Science, University of Toyko, Toyko 153-8505, Japan
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-01-15 Published:2010-01-15
  • Contact: WANG Botao

摘要: 对移动对象索引频繁更新问题进行了研究,提出了一种基于区域覆盖的空间索引结构虚拟网格四分树(virtual grid quadtree,VGQ);通过索引移动对象所在的区域而非移动对象本身来减少由于移动对象位置的改变而引起的索引结构的改变,并给出了近似连续范围查询算法及增量和自底向上优化策略。实验结果表明,VGQ在查询效率和空间使用上是一种有效的索引方法。

关键词: 移动对象, 空间索引, 连续范围查询

Abstract: For the frequent updating problem of moving object index, virtual grid quadtree (VGQ) is proposed based on the covered areas of mobile objects, where the areas covered by mobile objects are indexed instead of the locations of mobile objects so as to reduce the number of update operations of index structure. Based on VGQ, one approximate continuous range query algorithm with incremental and bottom-up optimization is proposed. Evaluation results show that VGQ index is efficient with regard to the response time and index space.

Key words: mobile object, spatial index, continuous range query

中图分类号: