摘要： 随着无线网络的快速发展，相应的无线应用服务越来越多，位置相关信息服务(LDISs)就是其中典型的例子。由于用户查询位置信息的模糊性，该文运用数学方法，在D-Tree 索引结构基础上，提出了位置相关信息服务的系统流程框架，给出了一种数据区域互补虚相交的方法，使得查询方式更加实用、灵活方便。

关键词: 位置相关信息服务；索引结构；互补虚相交

Abstract: With rapidly development of wireless network technology in the past few years, there appear to be more demand for wireless applications and services, among which location-dependent information services (LDISs) is an outstanding one. Fully utilizing mathematics, this article puts forward a system flow chart of LDIS and provides an approach of complementary void intersection in data areas based on D-Tree index structure to treat with user’s obscure location information. So more flexible and convenient location-dependent information can be managed.

Key words: Location-dependent information services; Index structure; Complementary void intersection