TESTSYSTEM ZUR PRÜFUNG VON ÜBERTRAGUNGSVORGÄNGEN INNERHALB EINES MOBILFUNKNETZES SOWIE VERFAHREN ZUR AUTHENTISIERUNG EINES MOBILTELEFONS UNTER VERWENDUNG EINES DERARTIGEN TESTSYSTEMS

A test system ( 1 ) serves to check transmission processes in a mobile radio network ( 2 ). The latter comprises a central switching computer ( 8 ), a local mobile telephone ( 13 ) equipped for SIM communication, and a transmission unit ( 3 ) comprising a local transmission unit ( 5 ). Other components of the test system ( 1 ) include a local SIM simulation computer ( 10 ), which is connected to the local transmission unit ( 5 ) on one hand and to the mobile telephone ( 13 ) on the other hand, a control computer ( 23 ), which is used for controlling the testing operation, and which is connected to the mobile radio network ( 2 ), as well as an authentication computer ( 14 ), which is connected to the SIM simulation computer ( 10 ) and with which the mobile telephone ( 13 ) can be authenticated. For the authentication, a method is used that requires only two communication steps over the remote signal connection.