东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (2): 199-203.DOI: 10.12068/j.issn.1005-3026.2014.02.011

• 信息与控制 • 上一篇    下一篇

基于缓存技术的路网最短路径查询

李晓华,王士猛,杨晓春,于戈   

  1. (东北大学 信息科学与工程学院, 辽宁 沈阳110819)
  • 收稿日期:2013-05-24 修回日期:2013-05-24 出版日期:2014-02-15 发布日期:2013-11-22
  • 通讯作者: 李晓华
  • 作者简介:李晓华(1969-),女,辽宁沈阳人,东北大学博士研究生,讲师;杨晓春(1973-),女,辽宁沈阳人,东北大学教授,博士生导师;于戈(1962-),男,辽宁大连人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(61322208,61272178);国家自然科学基金海外及港澳学者合作基金资助项目(61129002);教育部高等学校博士学科点专项科研基金资助项目(20110042110028);中央高校基本科研业务费专项资金资助项目(N120504001,N110404015).

Cachebased Shortest Path Query in Road Network

LI Xiaohua, WANG Shimeng, YANG Xiaochun, YU Ge   

  1. School of Information Science & Engineering,Northeastern University, Shenyang 110819, China.
  • Received:2013-05-24 Revised:2013-05-24 Online:2014-02-15 Published:2013-11-22
  • Contact: LI Xiaohua
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摘要: 分析了目前基于缓存进行路网上最短路径查询常用方法的不足,提出一种支持路网最短路径查询的缓存管理方法.该方法在缓存有限的情况下,有效地选择那些不同但能满足更多查询请求的最短路径,将其放入缓存.提出了缓存代价模型,并设计了缓存构造算法.最后采用真实数据集进行性能分析.实验测试显示,本文提出的方法比现有方法具有更高的缓存命中率,平均执行效率优于现有的处理技术.

关键词: 最短路径, 缓存, 代价模型, 路网, 命中率

Abstract: Based on the analysis of the shortcomings of the existing methods for querying shortest path in road network using cache, a new cachemanaging method was proposed. When the cache’s size was limit, the shortest paths which were expected to answer different queries as much as possible were selected effectively using the method and stored in the cache. The cache benefit model was proposed, with the cache structure designed. The experiments on real data set and the analysis demonstrate that the proposed approach can hit more paths in the cache, which results in the average high performance compared with the existing approaches.

Key words: shortest path, cache, benefit model, road network, hit ratio

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