| 摘要 |
In combined systems of different radio systems, for example in a combined system of the radio access network (RAN) of the IMT-2000 system and the core network (MSC) of the GSM system, a problem exists in transferring encryption settings from a system element to the others. The present invention relates to a method of setting encryption for a connection in such a combined system, where the handling of the encryption settings of the switching centre (MSC) and the base station (BTS) of the radio network is carried out at different protocol layers than the handling of the encryption settings of the mobile terminals (MT). In the method, encryption is arranged for the connection between the radio access network (RAN) and the mobile terminal (MT), and an encryption setting is transmitted from the switching centre (MSC) to the control unit (BSC) of the radio access network (RAN). According to the invention, the method is characterized in that an encryption setting is transferred from the control unit (BSC) to the mobile terminal (MT) transparently from the point of view of the base station. |
