Method and system for gsm authentication during wlan roaming

Details Method and system for gsm authentication during wlan roaming Method and system for gsm authentication during wlan roaming

H - Electricity

04

W

H04W 36/00 (2009.01) H04W 12/06 (2009.01) H04W 84/12 (2009.01)

Patent

CA 2495539

The invention relates to a method for automatic roaming between heterogeneous WLANs and/or GSM/GPRS/UMTS networks. According to said method, for authentication purposes a mobile IP node (20) requests access to the WLAN at an access point (21, 22). Upon receiving a request from the access server (23), the mobile IP node (20) transmits an IMSI that is stored on a SIM card (201) of the mobile IP node (20) to said access server (23). Based on said IMSI and with the aid of information stored in a SIM user database (34), the logic IP data channel of the WLAN is supplemented in a user specific manner with corresponding GSM data for signal and data channels of a GSM network and the authentication of the IP nodes (20) is carried out in an HLR (37) and/or (37) a GSM network.

L'invention concerne un procédé d'itinérance automatique entre des réseaux WLAN et/ou GSM/GPRS/UMTS hétérogènes. Aux fins d'authentification selon ce procédé, un noeud IP mobile (20) demande accès au WLAN au niveau d'un point d'accès (21, 22). Le noeud IP mobile (20) transmet au serveur d'accès (23), sur une demande du serveur d'accès (23), une IMSI enregistrée sur une carte SIM (201) du noeud IP mobile (20). Sur la base de l'IMSI et à l'aide de données enregistrées dans une base de données utilisateur SIM (34), on complète le canal données IP logique du WLAN par les données GSM correspondantes pour les canaux signaux et données d'un réseau GSM spécifique utilisateur. L'authentification du noeud IP (20) est exécutée au niveau d'un enregistreur de localisation nominal (HLR) (37) et/ou d'un enregistreur de localisation de visiteurs (VLR) (37) d'un réseau GSM.

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