| 摘要 |
A method of enabling roaming of a mobile intemet-access host (9) from a local area network (3) to a GSM network (6), each network having a home agent (HA) for routing intemet datagrams between networks. The method comprises deregistering the mobile terminal (9) from said local area network (3) and registering it with the GSM network (6) and allocating to the mobile host (9) a new intemet address in the GSM network (6). An intemet security key is sent via the GSM Short Message Service from the local area network's home agent (HA) to the mobile terminal (9). The new intemet address is transmitted, together with authentication data generated using the security key, via the intemet (5) to the local area network's home agent (HA) which registers that address as a care-of-address for the mobile host (9). <IMAGE> |
