Patent ID: 8798003

Claim:
A hybrid communication terminal which is connected to a 3G network and a WIMAX network, controls a handover from a handover transmission source network to a handover transmission destination network, is connected to a computer, comprising: an installer which installs a handover controller to the computer when the hybrid communication terminal is connected to the computer at the first time, wherein, when that a second IP address assigned to the hybrid communication terminal by the handover transmission destination network differs from a first IP address assigned to the communication terminal by the handover transmission source network, the hybrid communication terminal is controlled by the handover controller in accordance with an instruction from the computer, a virtual network device is set on an operating system of the computer, a dummy IP address is set in the virtual network device during communication connection processing with the handover transmission source network, and the first IP address assigned by the handover transmission source network is set in a network device corresponding to the handover transmission source network, a virtual driver of the virtual network device rewrites a transmission source IP address of user data transmitted from a communication application to the first IP address from the dummy IP address during user data communication, and a driver of the network device rewrites a transmission destination IP address of data from the handover transmission source network to the dummy IP address from the first IP address during the user data communication.