摘要： 无线局域网(WLAN)技术日趋成熟,如何为WLAN用户提供实用、方便的服务是当前推动WLAN进一步发展的“瓶颈”。论述了WLAN的现状及困境;提出了结合地理信息系统技术(GIS),开发WLAN环境下的位置服务;重点讨论了基于WLAN信号强度的定位方法、系统框架和WLAN位置服务的主要功能;最后根据原型试验,详细分析了影响WLAN定位精度的主要因素及改善方法。

关键词: 无线局域网, 位置服务, 地理信息系统, 定位, 无线信号强度

Abstract: With the advancing of WLAN technology, how to provide helpful and convenient services becomes the bottle neck of WLAN’s furtherdevelopment. WLAN’s current status and its embarrassment are discussed. Then, the concept of location based service (LBS) within WLAN is putforward. Thirdly, the WLAN RSSI based positioning method and the system infrastructure are analyzed in detail. Finally, according to the result ofprototype experiment,the factors which influence the positioning accuracy are discussed.

中图分类号: 

• TN925.93