Wireless location using signal fingerprinting and other location estimators
AssigneeTracBeam LLC
InventorsCharles L. Karr, Dennis J. Dupray
Life of this patent
Estimating the term…
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AssigneeTracBeam LLC
InventorsCharles L. Karr, Dennis J. Dupray
Estimating the term…
A wireless location system is disclosed. Locations of mobile stations (MS) may be determined using one or more MS locating technologies based on, e.g.: computed offsets from terrestrial base stations; satellite transmissions; indoor antennas; low range base stations; and in particular, signal pattern recognition for associating wireless signal characteristics with distinct geographic locations. The system can: adapt and/or calibrate its performance with environmental and geographical changes; capture location signal data for enhancement of a self-maintaining database of predictive location signal data; evaluate MS locations using heuristics and constraints related to terrain, MS velocity and path extrapolation; and adjust MS locations adaptively and/or statistically for providing more reliable and accurate locations. The system can be configured for environments ranging from dense urban, urban, suburban, rural, mountain to low traffic or isolated roadways. The system is useful for 911 emergencies, tracking, routing (e.g., to desired products/services), people and animal location including applications for confinement to and exclusion from certain areas.
A method for estimating, for each mobile station MS of a plurality of mobile stations, a location, L for MS using wireless signal measurements obtained from transmissions between the mobile station MS and a plurality of terrestrial communication stations, wherein each of said communications stations has one or more of each of a transmitter and a receiver for Tirelessly communicating with the mobile station MS, comprising:
Dependencies are inferred from the claim text.