Cellular fraud deterrent system

Details Cellular fraud deterrent system Cellular fraud deterrent system

1995-09-12

1998-01-27

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 541, 455 561, 455 542, 455 671, H04Q 700, H04Q 900

Patent

active

057130728

ABSTRACT:
A system for deterring fraudulent cloning by a reader station of valid call-origination message parameters assigned to authorized mobile radiotelephone stations operating within a cell or other area of a cellular radiotelephone system in which valid call origination messages are initiated between the mobile stations and a fixed cell-site radiotransceiver station for that cell or area. A database containing a plurality of valid call-origination message parameter combinations assigned to the authorized mobile stations is established in the radiotelephone system. An auxiliary fraud-deterrent transmitter station transmits call origination messages containing invalid parameters in such cell or area the cellular radiotelephone system. These invalid parameters are not verifiable at the database. The reader station receives both the valid and invalid call origination messages with an inability to discern with certainty between the valid and the invalid call origination messages.

REFERENCES:
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patent: 5335278 (1994-08-01), Matchett et al.
patent: 5337345 (1994-08-01), Cassidy et al.
patent: 5437053 (1995-07-01), Sawa et al.
patent: 5448760 (1995-09-01), Frederick

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