Method and Apparatus for Location Fingerprinting
First Claim
1. A method in a wireless communication system configured to estimate the location of a mobile terminal by comparing a radio fingerprint of the mobile terminal'"'"'s location to one or more reference radio fingerprints of one or more reference locations, the method comprising:
- obtaining a radio fingerprint of the mobile terminal'"'"'s location based on signal measurements performed by the mobile terminal at a radio frequency distinct from that used to obtain the one or more reference radio fingerprints; and
transforming the radio fingerprint, or the one or more reference radio fingerprints, or both, based on said distinction.
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Accused Products
Abstract
Methods and apparatus taught herein facilitate accurate estimation of a mobile terminal'"'"'s location via location fingerprinting. Specifically, the methods and apparatus obtain a radio fingerprint of the mobile terminal'"'"'s location based on signal measurements (e.g., signal strength, signal quality, or path loss) performed at a radio frequency distinct from that used to obtain the reference radio fingerprints. The methods and apparatus transform the radio fingerprint, or the reference radio fingerprints, or both, based on that distinction, such as by offsetting signal measurements of the radio fingerprint by an amount determined based on theoretical or experimental models of the dependency of the signal measurements on the radio frequency at which they are performed. The radio fingerprint of the mobile terminal'"'"'s location may then be compared to the reference radio fingerprints, to accurately estimate the mobile terminal'"'"'s location despite the radio fingerprint and the reference radio fingerprints having been obtained using different frequencies.
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Citations
22 Claims
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1. A method in a wireless communication system configured to estimate the location of a mobile terminal by comparing a radio fingerprint of the mobile terminal'"'"'s location to one or more reference radio fingerprints of one or more reference locations, the method comprising:
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obtaining a radio fingerprint of the mobile terminal'"'"'s location based on signal measurements performed by the mobile terminal at a radio frequency distinct from that used to obtain the one or more reference radio fingerprints; and transforming the radio fingerprint, or the one or more reference radio fingerprints, or both, based on said distinction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus in a wireless communication system, the system configured to estimate the location of a mobile terminal by comparing a radio fingerprint of the mobile terminal'"'"'s location to one or more reference radio fingerprints of one or more reference locations, the apparatus comprising:
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a receiver configured to obtain a radio fingerprint of the mobile terminal'"'"'s location based on signal measurements performed by the mobile terminal at a radio frequency distinct from that used to obtain the one or more reference radio fingerprints; and a transformation circuit configured to transform the radio fingerprint, or the one or more reference radio fingerprints, or both, based on said distinction. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification