I Am the Antenna: Accurate Outdoor AP Location Using Smartphones
Today's WiFi Access Points (APs) are ubiquitous, and provide critical connectivity for a wide range of mobile networking devices. Many management tasks, e.g. optimizing AP placement and detecting rogue APs, require a user to efficiently determine the location of wireless APs. Unlike prior localization techniques that require either specialized equipment or extensive outdoor measurements, the authors propose a way to locate APs in real-time using commodity smartphones. Their insight is that by rotating a wireless receiver (smartphone) around a signal-blocking obstacle (the user's body), they can effectively emulate the sensitivity and functionality of a directional antenna.