Wi-Fi-based indoor localization is a solved problem --- given a space with enough Wi-Fi access points (APs) and a set of radio frequency (RF) signal strength measurements that profile the environment, we can provide a service that can accurately locate uncalibrated devices in that space. No one would argue with this assertion, yet after more than 15 years of research, there are no pervasive products and the research community continues to work on this problem. Why?
['Paramvir Bahl']
Indoor Localiza tion: Are We There Yet?