Geofences based on RF fingerprints
First Claim
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1. A method of determining a breach of a geofence in a mobile device comprising:
- obtaining, at the mobile device, a reference radio frequency (RF) fingerprint, the reference RF fingerprint defining the geofence, wherein the reference RF fingerprint comprises absolute information for a plurality of transmitters and relative information that describes distance information from the plurality of transmitters;
scanning RF signals received by the mobile device;
determining a scanned RF fingerprint based on the scanning; and
determining if the breach of the geofence has occurred by comparing the reference RF fingerprint to the scanned RF fingerprint.
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Abstract
Systems, apparatus and methods in a mobile device for determining a breach of a geofence is presented. A reference radio frequency (RF) fingerprint is obtained by the mobile device, the reference RF fingerprint defining the geofence. The reference RF fingerprint may be generated by the mobile device or received from a different mobile device. The mobile device scans for RF signals and determines a scanned RF fingerprint based on the scan for RF signals. A breach of the geofence is determined using the reference RF fingerprinting and the scanned RF fingerprint.
24 Citations
31 Claims
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1. A method of determining a breach of a geofence in a mobile device comprising:
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obtaining, at the mobile device, a reference radio frequency (RF) fingerprint, the reference RF fingerprint defining the geofence, wherein the reference RF fingerprint comprises absolute information for a plurality of transmitters and relative information that describes distance information from the plurality of transmitters; scanning RF signals received by the mobile device; determining a scanned RF fingerprint based on the scanning; and determining if the breach of the geofence has occurred by comparing the reference RF fingerprint to the scanned RF fingerprint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 31)
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10. A mobile device for determining a breach of a geofence, the mobile device comprising:
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at least one of a wireless wide area network (WWAN) transceiver and a wireless local area network (WLAN) transceiver; and a processor coupled to the at least one of the WWAN transceiver and the WLAN transceiver and configured to obtain a reference radio frequency (RF) fingerprint, wherein the reference RF fingerprint comprises absolute information for a plurality of transmitters and relative information that describes distance information from the plurality of transmitters, the reference RF fingerprint defining the geofence, scan for RF signals with the at least one of the WWAN transceiver and the WLAN transceiver, determine a scanned RF fingerprint based on the scan for RF signals, and determine if the breach of the geofence has occurred by comparing the reference RF fingerprint to the scanned RF fingerprint. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A mobile device for determining a breach of a geofence, the mobile device comprising:
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means for obtaining, at the mobile device, a reference radio frequency (RF) fingerprint, wherein the reference RF fingerprint comprises absolute information for a plurality of transmitters and relative information that describes distance information from the plurality of transmitters, the reference RF fingerprint defining the geofence; means for scanning RF signals received by the mobile device; means for determining a scanned RF fingerprint based on the scanning; and means for determining if the breach of the geofence has occurred by comparing the reference RF fingerprint to the scanned RF fingerprint. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A non-transient computer-readable storage medium including program code stored thereon for a mobile device to determine a breach of a geofence, comprising program code to:
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obtain, at the mobile device, a reference radio frequency (RF) fingerprint, wherein the reference RF fingerprint comprises absolute information for a plurality of transmitters and relative information that describes distance information from the plurality of transmitters, the reference RF fingerprint defining the geofence; scan for RF signals received by the mobile device; determine a scanned RF fingerprint based on the scan for RF signals; and determine if the breach of the geofence has occurred by comparing the reference RF fingerprint to the scanned RF fingerprint. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification