Mobile IP communication scheme using dynamic address allocation protocol

A mobile computer management method for a communication system having a mobile computer which is capable of carrying out communications while moving among networks, and a mobile computer management device provided at a home network of the mobile computer for managing a moving location information of the mobile computer and transferring packets destined to the mobile computer to a current location of the mobile computer, the mobile computer management method comprising:

• receiving at the mobile computer management device a prescribed message from the mobile computer, and transmitting from the mobile computer management device a request message for requesting not to allocate a dynamic address allocated to the mobile computer at the home network to another computer for a prescribed period of time to an address management server of the home network:
• receiving at the mobile computer management device a location registration message containing information on the current location of the mobile computer and information capable of identifying the mobile computer, from the mobile computer at the current location outside the home network;
• and
• returning a response message from the mobile computer management device to the mobile computer in response to the location registration message such that the mobile computer can carry out mobile communications using the dynamic address allocated to the mobile computer at the home network.

A computer program product for causing a computer to function as a mobile computer management device for managing a moving location information of a mobile computer which is capable of carrying out communications while moving among interconnected networks, and transferring packets destined to the mobile computer to a current location of the mobile computer, the computer program product comprising:

• a first computer program code for causing the computer to receive a prescribed message from the mobile computer, and transmit a request message for requesting not to allocate a dynamic address allocated to the mobile computer at the home network to another computer for a prescribed period of time to an address management server of the home network;
• a second computer program code for causing the computer to receive a location registration message containing information on the current location of the mobile computer and information capable of identifying the mobile computer, from the mobile computer at the current location outside the home network;
• and
• a third computer program code for causing the computer to return a response message to the mobile computer in response to the location registration message such that the mobile computer can carry out mobile communications using the dynamic address allocated to the mobile computer at the home network.