Patent ID: 7684392

Claim:
A data transfer controller for controlling data transfer through a network, comprising an access router that: transmits a router advertisement, as an information report from an access router, to a mobile node which performs address-setting, wherein the router advertisement comprises a physical network prefix associated with a sub-network to which the mobile node is connected and a virtual network prefix for the mobile node as a network prefix which is different from the physical network prefix; receives a pure-micro registration request message from the mobile node, the pure-micro registration request message including a current address of the mobile node, an old address thereof in a previous sub-network, and an old physical network prefix corresponding to the previous sub-network; and directly transfers the pure-micro registration request message to a pure-micro gateway router located at the boundary between a quasi-micro mobility network for performing prefix-based routing and a pure-micro mobility network for performing host-based routing for a packet addressed to the mobile node and also for performing the prefix-based routing.