Mobile IP communication scheme using visited site or nearby network as temporal home network

A mobile computer device capable of carrying out communications while moving over inter-connected networks including a first network that is an original home network of the mobile computer device and a second network that is a visited site network of the mobile computer device, the mobile computer device comprising:

• an exchange processing unit configured to receive a network configuration information of the second network from a management device of the second network at a time of moving from the first network to the second network, when it is possible to receive the network configuration information from the management device of the second network;
• and
• a communication control unit configured to control communications by selecting a new communication setting that indicates the second network as a home network of the mobile computer device or an original communication setting that indicates the first network as a home network of the mobile computer device, when the network configuration information received from the management device of the second network contains a home address information of the management device of the second network.