大规模WiFi无线地图的特点及其在室内定位中的意义

Sangwook Bak, Seokseong Jeon, Young-Joo Suh, Chansu Yu, Dongsoo Han
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引用次数: 14

摘要

由于智能手机等移动设备的广泛普及,室内和室外的定位构成了许多基于位置的服务的关键组成部分。本文考虑使用WiFi指纹(FPs)进行室内定位,它是一组来自可观测接入点(ap)的接收信号强度(RSS)值。通常情况下,FPs会在一个场所的多个地点收集,以创建WiFi无线地图,然后用于估计客户端设备的位置。然而,以往的研究大多是在学术建筑等小型场所评估其室内定位算法和机制,这给我们留下了一个重要而实际的问题,即它们在具有数百或数千个ap的大型环境中是否表现良好。我们对首尔江南区Coex地下购物中心的大型场地进行了调查,结果显示,现有的大部分解决方案可能都无法奏效。本文对江南会展中心的放射性地图进行了描述,同时强调了与典型的小型学术建筑的差异,以便于大型场馆室内定位算法的设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Characteristics of a large-scale WiFi radiomap and their implications in indoor localization
Due to the wide-spread of mobile devices such as smartphones, localization at both indoors and outdoors constitute a critical component in numerous location-based services. This paper considers indoor localization using WiFi fingerprints (FPs), which is a set of received signal strength (RSS) values from observable access points (APs). Typically, FPs are collected at several locations in a venue to create a WiFi radiomap, which is then used to estimate the location of a client device. However, most of previous studies evaluated their indoor localization algorithms and mechanisms on small-scale venues such as academic buildings, leaving us an important and practical question whether they perform well in large-scale environments with hundreds or thousands of APs. We surveyed a large-scale venue of Gangnam Coex underground mall in downtown Seoul, Korea, which might be sufficient to make most of existing solutions to suffer. This paper characterizes the radiomap of Gangnam Coex while highlighting the differences with that of a typical, small-scale academic building to facilitate the design of indoor localization algorithms for large-scale venues.
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