Togewa Holding Ag

Michael Kauz

Toni Stadelmann

Jeremy Richard Conn

Richard Conn Jeremy

The invention relates to a method for automatic roaming between heterogeneous WLANs and/or GSM/GPRS/UMTS networks, in which method, for authentication, a mobile IP node () requests access to the WLAN at an access point (), in which method, upon request from the access server (), the mobile IP node () transmits an IMSI stored on a SIM card () of the mobile IP node () to the access server (), and in which method, based on the IMSI, using information stored in an SIM user database (), the logic IP data channel of the WLAN is supplemented user-specifically towards corresponding GSM data for signal and data channels of a GSM network, and the authentication of the IP nodes () is carried out in an HLR () and/or VLR () of a GSM network.

Method and system for GSM authentication during WLAN roaming

The invention relates to a method and system for recording and billing of services during roaming of a mobile IP node () in heterogeneous WLANs, in which first call detail records are transmitted from an access server () to a billing module () and second call detail records from the access server to a proxy module (). By means of a clearing module (), the obtained service is billed () at a provider () of a fixed network () and/or TAP files () are transmitted to a GSM () service provider () for billing.

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Lausanne, Switzerland

Michael Kauz