基于用户反馈的 WiFi 位置指纹数据库更新算法

摘要

为使 WiFi 位置指纹数据库，不在定位区域 WiFi 环境发生改变时，出现位置指纹过时现象，设计一种更新算法。该算法使用用户的反馈数据，考虑了 AP 信号不稳定情况下 AP 新增与撤销的检测问题；消除了手机热点等临时 AP 对传统更新算法的影响；最终通过检测 AP 位置移动等引起的 RSS 改变，加速位置指纹数据库的更新。实验结果表明，在实际环境中该算法在指纹数据库的更新效率上优于传统更新算法。%We propose an update algorithm for Wi-Fi location fingerprint database will not occur the location fingerprint outdate situation when Wi-Fi environment in location area changes.This algorithm uses feedback data from users and takes APs adding and revocation detection issue in circumstance of AP signal unstable into account,eliminates the impact of temporary AP such as mobile phone hotpot on traditional update methods.Finally,this algorithm accelerates the location fingerprint database’s update by detecting the RSS changes caused by AP location moving.Experimental results show that in actual environment this algorithm is superior to the traditional update algorithms on update efficiency of fingerprint database.