Does version 2.0 of XPS use any other data from a Wi-Fi access point?
The other data element we use to determine location is the Received Signal Strength Indicator (RSSI), a measurement of the strength of the access point’s signal at the time it is received by the mobile device. XPS uses the RSSI data to help determine how close a mobile device is to a router when it requests a location calculation and whether it is operating indoors or outdoors.