Patent ID: 8706140

Claim:
A device for estimating the position of itself in response to gathering wireless signal information from WLAN access points (APs), said device comprising: a WLAN radio module for receiving WLAN signals transmitted by WLAN APs in range of said device; scan logic to cause the WLAN radio module to scan for WLAN signals transmitted by WLAN APs in range of said device, wherein the scan logic stops the scanning after detecting at least a threshold number of WLAN APs to locate the device, wherein the threshold number is selected based on a desired position estimate accuracy; extraction logic for extracting information from received WLAN signals to identify the WLAN APs; and logic to cooperate with a WLAN based positioning system to estimate the position of the device based at least in part on the extracted information identifying the WLAN APs in the range of said device.