摘要
针对校园网中无线网络的集中式部署的特点,研究基于WLAN定位的位置服务系统。系统体系结构分为3层:表示层、服务层和数据层。表示层完成位置服务的请求与展示;服务层核心功能包括地理信息数据管理、位置服务信息发布服务、位置服务核心功能等。数据层中的数据来源主要有空间地理信息数据库、无线信号指纹数据库以及校园无线网络设备提供的无线网络管理信息数据。并重点分析位置服务的两个核心功能:WLAN定位服务与无线网络状态监测的设计和实现。提出了初步定位和精确定位相结合两阶段定位方法,实现改进的加权KNN定位算法。最后对位置服务系统的性能进行了实验验证。
According to the characteristics of the centralized deployment of WLAN in campus network,an architecture of the Location-based Service(LBS) system has been presented.The architecture consists of three tiers: presentation tier,service tier and data tier.In this paper,the implementation of the two core functions including WLAN localization service and WLAN monitoring service have been presented in details.A two-stage localization method including initial localization and precision localization has been described,and propose a weighted KNN localization algorithm for precision localization based on location fingerprint.Finally,the experiments verify the performance of the system in campus network.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第S1期65-68,共4页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
北京市教委共建项目基金资助项目(JD100060630)
关键词
WLAN
位置服务
位置指纹
网络监测
WLAN
location-based service
location fingerprint
network monitoring
