| 摘要 |
A communication system is disclosed comprising a gateway connecting a source base station and a target base station. The gateway receives a message from the source base station initiating a handover of a mobile device from the source to the target base station. The received message comprises a security context (an NCC-K,NB pair and/or aKeNR*) for securing communications with the mobile device, and for deriving a further key for securing subsequent communications with the mobile device. The gateway generates and sends, to the target base station, a message requesting the target base station to carry out a handover, the message comprising the security context and a current value of an associated counter for deriving a further key for securing subsequent communications with the mobile communication device. |
