METHOD FOR DETECTING FRAUD IN ROAMING CONNECTIONS IN MOBILE NETWORKS

摘要

1. A method for detecting fraud in mobile communication networks, in particular, fraud detection in roaming connections, in which the existing MEGS (24) abuse detection system is used for preliminary analysis of possible roaming frauds and, if the MEGS (24) system detects a distinguished subscriber identity module ( SIM card 20a) the roaming connection corresponding to the subscriber identity module is checked using at least one additional criterion for possible abuse, characterized in that, as a criterion, the degree of occupancy of a given subscriber identity module (20a) is checked for a certain period of time, and the degree of occupancy of a subscriber identity module (20a) is determined using at least one test call (ping call) per module subscriber identification, before making a ping call using the current location query, determine the current location of the subscriber identification module in the VLR (20a), before making a ping call, determine the current status of the SS module identifier Subscriber display, including call waiting, call forwarding and call forwarding when busy, in the HLR reference register of location (23), with activated call forwarding or activated call forwarding when busy / activated call waiting in conjunction with ISUP1, SS service in the HLR, they temporarily deactivate, then make a ping call, and after making a ping call, they restore the original SS status again. ! 2. The method according to claim 1, in case the degree of employment exceeds a certain