Nokia Corporation

Esko Paldan

Raili Numminen

Markus Martin

Jaana Hurme

Soili Haapala

Vesa Blom

Kari Einamo

Tomi Lindgren

Petteri Mandelin

Jarkko Lohtaja

Leena Rossi

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.

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

The invention relates to a method and an arrangement against fraudulent use in a telecommunications network. The invention is based on the idea that at least one fraud profile identified by an identifier is created and the identifier is included in the subscriber data of some subscribers. Based on this identifier the fraud restriction parameters of the subscriber are retrieved from the subscriber's fraud profile, and these fraud restriction parameters are used in detecting and indicating possible fraudulent use. The fraud restriction parameters include values for different service limits, such as the maximum number of call forwarding re-quests and/or the maximum number of location updates during a certain period, and possibly at least for some features an action parameter related to a service limit and implemented when the service limit is reached.

Detecting and preventing fraudulent use in a telecommunications network

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Lempààlà, Finland

Esko Paldan