Patent ID: 6295446
Filing Date: 2001-09-25
Classification: H04W

Abstract:
An apparatus for detecting fraud in a radio network comprising:a mobile station including a nonvolatile memory storing an electronic identification number and a first table including a plurality of entries, each entry relating to a prior mobile station calling event; anda mobile switching center in radio communication with the mobile station, the mobile switching center including a memory storing a second table including a plurality of entries, each entry relating to a prior calling event for that mobile station, the mobile switching center operable to make a calling event query to the mobile station requesting the content of a selected one of the plural entries on the first table, compare a calling event response message containing the first table content of the selected entry that is received from the mobile station responsive to the calling event query with the content of a corresponding entry on the second table, and detect mobile station fraud when the content does not match.