Patent ID: 8229455

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; extraction logic for extracting information from said 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; wherein said extraction logic includes logic for caching the extracted identities of the WLAN APs in range of the device, logic for caching information indicating the time of reception of the signals to identify the WLAN APs transmitted by the corresponding WLAN AP, and logic for generating movement information of the device from the cached time information; and wherein said logic to cooperate considers the cached time information and movement information when providing extracted and cached information to said WLAN-based positioning system.