| 摘要 |
In the present invention a radio access network infrastructure, such as the TETRA, is connected to a second network infrastructure, such as a network sub-system (NSS) of the GSM, which has different authentication procedures and triplets than the radio access network. The problem relating to the different authentication schemes is overcome by using the authentication of the overlaying network layer in combination with the authentication procedures of the radio access network layer. When the mobile station (MS) registers to the system, the mobile station is first authenticated in the overlaying network layer (GSM). In this initial authentication the authentication procedures and authentication parameters of the overlaying network, such as the authentication triplet of the GSM, is used. The authentication parameters of the radio access layer (TETRA), such as the random seed and the random challenge of the TETRA, are derived from the authentication parameters used in the initial authentication. Then the derived authentication parameters are used in any subsequent authentication procedure within the first radio access infrastructure layer (TETRA) until a new authentication is needed in the overlaying network infrastructure layer (GSM). |
