Patent ID: 8165150
Filing Date: 2012-04-24
Classification: G01S,H04J

Abstract:
1. A system for determining a location of a client in a local area network, the local area network including at least three access points in communication with the client, the system comprising: a ranging subsystem for determining estimated distances between the client and the at least three access points, each of the at least three access points having a known position; and a positioning subsystem for determining the location of the client utilizing the estimated distances between the client and the at least three access points and the known positions of the at least three access points, the positioning subsystem including at least one virtual reference station, the at least one virtual reference station being used to determine the location of the client, the positioning subsystem using a trilateration process to determine the location of the client, the at least one virtual reference station being access points in the local area network and do not participate in the trilateration process.