Method for secure access of a WLAN-enabled terminal in a data network and device for carrying out said method

摘要

A terminal is assigned to a home radio access network and the access node of the data network is assigned to a second radio access network. An access control function of the access node receives from the terminal a first message containing an authentication code. The access control function of the access node identifies the home radio access network associated with the terminal from the authentication code. The access control function then sends an inquiry message including the authentication code to an access control function of the home radio access network associated with the terminal. From the authentication code, the home radio access network identifies the user as a subscriber of the relevant home radio access network. This is done e.g. by interrogating data from the HLR (Home Location Register) or the HSS (Home Subscriber Server).