System and method of detecting and preventing fraudulent...

H - Electricity – 04 – Q

Patent

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H04Q 7/38 (2006.01)

Patent

CA 2270190

A system and method for detecting a fraudulent call origination in a radio telecommunications network having a subscriber's home Home Location Register (HLR) (14) for storing a stored location for a mobile station (11), a serving Mobile Switching Center (MSC) (12) in which the call origination is initiated, and a MSC-Location (MSC-L) (15) covering the location for the mobile station stored in the home HLR (14). The serving MSC (12) sends a reporting message to the home HLR (14) when a call is originated from the mobile station in the serving MSC. The reporting message indicates a reported location for the mobile station (11). The home HLR then sends paging request messages (18) to the serving MSC (12) and the MSC-L (15) requesting the serving MSC to page the mobile station in the reported location and requesting the MSC-L to page the mobile station in the stored location. Each MSC pages the mobile station and sends a paging result to the home HLR (14). The home HLR compares the stored location to the reported location, and analyzes the locations and the paging results to determine whether the call origination is fraudulent. If the call origination is determined to be fraudulent, the call is disconnected, and the mobile station is barred from originating calls until a proper personal identification number (PIN) code is entered.

L'invention porte sur un système et un procédé de détection des émissions d'appels illicites dans un réseau de radiotélécommunications comportant: un enregistreur de localisation nominal (ELN) (14) installé au domicile de l'abonné mémorisant l'emplacement enregistré d'une station mobile (11); un centre de commutation mobile (CCM) (12) de service d'où part l'émission d'appel, et un CCM de localisation (CCM-L) (15) couvrant la position de la station mobile mémorisée dans l'ELN (14) installé au domicile de l'abonné. Le CCM (12) de service envoie un compte-rendu à l'ELN (14) installé au domicile de l'abonné lorsqu'un appel émane de la station mobile du CCM (12) de service. Le compte-rendu indique la position rapportée de la station mobile (11). L'ELN (14) installé au domicile de l'abonné émet alors des messages de recherche (18) à destination du CCM de service (12) et du CCM-L (15) demandant au CCM de service de rechercher la station mobile à la position indiquée, et demandant au CCM-L de rechercher la station mobile à la position enregistrée. Chacun des CCM recherche la station mobile puis transmet le résultat de ses recherches à l'ELN (14) installé au domicile de l'abonné. Ce dernier compare la station enregistrée à la station indiquée et analyse les positions et les résultats de la recherche pour déterminer si l'émission d'appel est illicite ou non. Si c'est le cas, la communication est interrompue et la station mobile est exclue des appels jusqu'à l'introduction d'un numéro personnel d'identification (PIN) agréé.

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