Wi-Fi Positioning System
Wi-Fi-based positioning system (WPS, not to be confused with Wi-Fi Protected Setup) or WiPS/WFPS is used where GPS is inadequate due to various causes including multipath and signal blockage indoors. Such systems include indoor positioning systems. Wi-Fi positioning takes advantage of the rapid growth in the early 21st century of wireless access points in urban areas. Commercial providers of this type of positioning service include Google, infsoft, Navizon, AlterGeo, Skyhook Wireless and Combain Mobile.