The packet repeating installation, the portable computer device and the portable computer management device, packet relay manner, packet transmission manner and the portable computer position register

摘要

PROBLEM TO BE SOLVED: To continuously use a moving IP system even if a moving computer moves to a global address out of an organization by inspecting the content of a packet and transferring it as a system using a private address. ;SOLUTION: A packet relay device (moving computer management device) 5 receiving a ciphered registration request packet decodes the packet by a key for the moving computer 2 being a transmission source and inspects the contents of the packet. When it is judged to be the registration request of moving IP from identification information in a packet header, the home address and the present position address of the moving computer are taken out from the packet and they are registered in a management table. The payload of a response packet (registration succeeding packet) for the registration request is ciphered with the key corresponding to the moving computer 2 being a transmission destination. The moving computer 2 decodes the packet with the key corresponding to the packet relay device 5 being the transmission source and registration success is recognized from the obtained response packet.;COPYRIGHT: (C)1999,JPO