| 摘要 |
Authentication information for a mobile device connected to a first mobile communication network operated by a first network operator is obtained by receiving a request for subscriber server information and determining whether the request is for information to authenticate the mobile device. If it is, it is determined whether this can be obtained from a first subscriber server controlled by the first network operator or from a second subscriber server not controlled by the first network operator. The authentication information is retrieved from the first or second subscriber server via an authentication proxy server according to the result of the determination. If the request is for information other than authentication information, this is retrieved from the first subscriber server. An embodiment describes the migration of mobile device users to a new network without requiring the user to change a SIM card. It may also apply to a Mobile Virtual Network Operator (MVNO). |
