| 摘要 |
<p>A mobile body network as a sub-net constituting a composite IP network comprises a home agent server managing identifiers of a plurality of mobile terminals subscribed in this mobile body network, and a plurality of IP tunnel routers. When a mobile terminal has moved to another sub-net constituting the composite IP network, the home agent server accepts from the mobile terminal, transmission destination information required for transmission to the mobile terminal and delivers IP tunnel setting information specifying the mobile terminal and the transmission destination information to a plurality of IP tunnel routers. Upon reception of an IP packet to be transmitted to the mobile terminal, each of the IP tunnel routers transfers the IP packet in accordance with the IP tunnel setting information without using the home agent server.</p> |
