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.

Abstract: 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.

Abstract: The invention relates to a method and system for controlling information flow in a communication system comprising at least one subscriber equipment, and a subscriber information database entity which contains subscription-related information for defining the management of packet-based information flow to and/or from respective subscriber equipments. The database entity contains additional information associated to the stored subscription-related information which additional information defines whether stored subscription-related information may or may not be used for actually defining the management of packet-based information flow to and/or from respective subscriber equipments.

Abstract: The invention relates to a mobile communication system comprising: mobile stations (MS, MS′), a mobile switching center (MSC1), and a subscriber register (VLR1) 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 comprises: monitoring means (1) for monitoring the processes which trigger location information changes in said subscriber register (VLR1), and detecting means (2) for detecting and indicating the presence of a fraudulent mobile station (MS′) if a location information change has been triggered by a process which should not trigger a change of location information in said subscriber register (VLR1).

Abstract: 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.