Patent ID: 7414988
Filing Date: 2008-08-19
Classification: G01S,G06Q,G08G,H04W,Y10S

Abstract:
1. A Wi-Fi location server, comprising: a database of Wi-Fi access points for at least one target area having a radius on the order of tens of miles, said database being recorded in a computer-readable medium and including database records for substantially all Wi-Fi access points in the target area, each record including identification information for a corresponding Wi-Fi access point and calculated position information for the corresponding Wi-Fi access point, wherein said calculated position information is obtained from recording multiple readings of the Wi-Fi access point at different locations around the Wi-Fi access point so that the multiple readings have reference symmetry relative to other Wi-Fi access points in the target area and so that the calculation of the position of the Wi-Fi access point avoids arterial bias in the calculated position information; and computer-implemented logic to add records to the database for newly-discovered Wi-Fi access points said computer logic including logic to recalculate position information for Wi-Fi access points previously stored in the database to utilize position information for the newly-discovered readings of previously stored Wi-Fi access points.