Patent Number: 8,442,487

Title: Detecting a fraudulent mobile station in a mobile communication system using location information of mobile station

Abstract: The invention relates to a mobile communication system including mobile stations, a mobile switching center, and a subscriber register containing subscriber data, which includes location information indicating the location of mobile stations. In order to detect the presence of a fraudulent mobile station the system includes a monitor for monitoring the processes which trigger location information changes in the subscriber register, and a detector for detecting and indicating the presence of a fraudulent mobile station if a location information change has been triggered by a process which should not trigger a change of location information in the subscriber register.

Inventors: Lohtaja; Jarkko (Singapore, SG), Paldan; Esko (Lempaala, FI)

Assignee: Nokia Corporation

International Classification: H04M 1/66 (20060101); H04M 1/68 (20060101); H04M 3/16 (20060101); H04W 4/00 (20090101)

Expiration Date: 2021-05-14 0:00:00