System and method for detection of fraud in a wireless telephone system
US5956634A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1997 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Feb 28, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2215/32
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method for combining the results of different analysis portions to produce a single YES/NO decision regarding the validity of a present cellular telephone call. A soft data analysis portion of the system analyzes soft data, such as the results of a signature analyzer and a customer call profile and determines the likelihood that the particular call is a valid call from an authorized cellular telephone or an invalid call from a fraudulent cellular telephone. In addition, the system performs a deterministic analysis of the particular phone call to independently designate the particular phone call as valid or invalid. The outputs from the deterministic analyzer and the soft data analyzer portion are combined in a combinatorial logic circuit to produce a single binary output having one logic level for valid calls from the authorized cellular telephone and the opposite logic level for invalid calls from the fraudulent cellular telephone. In addition, the deterministic analyzer may include a control line to override the decision of the soft analyzer to permit calls to designated numbers, such as emergency numbers, even if the independent analysis indicates that the particula…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.