METHOD AND SYSTEM FOR GSM AUTHENTICATION DURING WLAN ROAMING

摘要

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.