Mobile geolocation
First Claim
1. A method comprising:
- obtaining, by a device, a first signature for a call associated with a mobile communication unit,the first signature including location information, a timestamp, and radio frequency measurement information obtained by the mobile communication unit at a location,the first signature not including identification information for the mobile communication unit;
comparing, by the device, the timestamp and the radio frequency measurement information included in the first signature to timestamps and radio frequency measurement information included in signatures in a database to identify a second signature,the second signature including different information, than the first signature, for the call associated with the mobile communication unit,the second signature having a timestamp and radio frequency measurement information that correspond to the timestamp and radio frequency measurement information of the first signature; and
creating, by the device, a first reference signature, by combining at least a part of the first signature with at least a part of the second signature,the first reference signature being for use in geolocation in a wireless communication system.
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Accused Products
Abstract
A method and apparatus for generating reference signatures for use in geolocation in a cellular wireless communication system is provided. A first signature for a mobile communication unit comprises location information, a timestamp, and radio frequency measurement information obtained by a mobile communication unit at a location, but does not contain identification information for the mobile communication unit. The first signature is compared to signatures in a database, to identify a second signature that has a timestamp and radio frequency measurement information that correspond to those of the first signature. A reference signature is created by combining at least a part of the first signature with at least a part of the second signature. Repetition of the comparison and combination steps creates a database of reference signatures, for use in geolocating other received call signatures.
12 Citations
20 Claims
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1. A method comprising:
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obtaining, by a device, a first signature for a call associated with a mobile communication unit, the first signature including location information, a timestamp, and radio frequency measurement information obtained by the mobile communication unit at a location, the first signature not including identification information for the mobile communication unit; comparing, by the device, the timestamp and the radio frequency measurement information included in the first signature to timestamps and radio frequency measurement information included in signatures in a database to identify a second signature, the second signature including different information, than the first signature, for the call associated with the mobile communication unit, the second signature having a timestamp and radio frequency measurement information that correspond to the timestamp and radio frequency measurement information of the first signature; and creating, by the device, a first reference signature, by combining at least a part of the first signature with at least a part of the second signature, the first reference signature being for use in geolocation in a wireless communication system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A cellular wireless communication system comprising:
a controller device to; obtain a first signature for a call associated with a mobile communication unit, the first signature including location information, a timestamp, and radio frequency measurement information obtained by the mobile communication unit at a location, the first signature not including identification information for the mobile communication unit; compare the timestamp and the radio frequency measurement information included in the first signature to timestamps and radio frequency measurement information included in a plurality of signatures in a database to identify a second signature of the plurality of signatures, the second signature including different information, than the first signature, for the call associated with the mobile communication unit, the second signature having a timestamp and radio frequency measurement information that correspond to the timestamp and radio frequency measurement information of the first signature; and create a first reference signature, by combining at least a part of the first signature with at least a part of the second signature. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A non-transitory computer-readable medium storing instructions, the instructions comprising:
one or more instructions that, when executed by a device, cause the device to; obtain a first signature for a call associated with a mobile communication unit, the first signature including location information, a timestamp, and radio frequency measurement information obtained by the mobile communication unit at a location, the first signature not including identification information for the mobile communication unit; compare the timestamp and the radio frequency measurement information included in the first signature to timestamps and radio frequency measurement information included in a plurality of signatures in a database to identify a second signature of the plurality of signatures, the second signature including different information, than the first signature, for the call associated with the mobile communication unit, the second signature having a timestamp and radio frequency measurement information that correspond to the timestamp and radio frequency measurement information of the first signature; and create a first reference signature by combining at least a part of the first signature with at least a part of the second signature.
Specification