Mobile geolocation

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.

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.