Localization of Access Points Based on Signal Strength Measured by a Mobile User Node

The issue of locating access points (APs) in a building is investigated in detail in this paper. The signal strength of beacon frames from a selected AP is measured at multiple positions, and the location of the selected AP is estimated based on the distance information inferred from the measured signal strength and a modified version of the Hata-Okumara model. A strategy is proposed to select three measurement points to improve localization accuracy for a selected target AP when signal strength is measured at multiple positions. The accuracy of the proposed scheme is evaluated through experiment.