| 摘要 |
Devices, a procedure and a system for making possible of roaming for a data communication terminal 140 between local data communication networks 102, 103 which are connected to a central data communication network 101, are described. Local data communication devices 110, 111 are connected to a local data communication network each 102, 103 and to the central data communication network and central data communication devices 120, 121, 122 are connected to the central data communication network. A central control unit 130, which is connected to the central data communication devices via the central data communication network, associates the data communication terminal with a current central data communication device 120 and informs the current central data communication device about this. The current central data communication device allocates a temporary address to the data communication terminal. A current local data communication device 110 detects that the data communication terminal is connected to the local data communication network 102, to which the local data communication device is connected and informs about this to the current central data communication device. The current central data communication device by that looks after which local data communication network the data communication terminal is connected. |
