HYBRID COMMUNICATION TERMINAL
First Claim
1. A hybrid communication terminal which is connected to a first radio network and a second radio network, controls a handoff from the first radio network to the second radio network, and is connected to a computer,wherein, assuming that a second IP address assigned to the communication terminal by the second radio network differs from a first IP address assigned to the communication terminal by the first radio network,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 first radio network, and the first IP address assigned by the first radio network is set in a network device corresponding to the first radio 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, anda driver of the network device rewrites a transmission destination IP address of data from the first radio network to the dummy IP address from the first IP address during the user data communication.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided a hybrid communication terminal which can overcome a drawback that, in performing switching a system between a 3G network and a WiMAX/LTE is performed under control of a mobile unit, when an IP address allocated to a mobile unit from the network differs before and after system switching, an active session of communication application is disconnected so that it is impossible to continue the communication. In automatically switching connection between different systems during communication, in order to conceal from the communication application that an IP address assigned by the network is changed, an exchange of user data with the communication network is performed via a virtual network device where the IP address is always the same.
9 Citations
2 Claims
-
1. A hybrid communication terminal which is connected to a first radio network and a second radio network, controls a handoff from the first radio network to the second radio network, and is connected to a computer,
wherein, assuming that a second IP address assigned to the communication terminal by the second radio network differs from a first IP address assigned to the communication terminal by the first radio network, 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 first radio network, and the first IP address assigned by the first radio network is set in a network device corresponding to the first radio 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 first radio network to the dummy IP address from the first IP address during the user data communication.
-
2. A hybrid communication terminal which is connected to a first radio network and a second radio network, controls a handoff from the first radio network to the second radio network, and is connected to a computer,
wherein, assuming that a second IP address assigned to the communication terminal by the second radio network is equal to a first IP address assigned to the communication terminal by the first radio network, a virtual network device is set on an operating system of the computer, and a device driver corresponding to the first radio network rewrites a transmission source IP address of data from the first radio network to a dummy IP address during communication connection processing with the first radio network, and the dummy IP address is set in a device driver corresponding to the first network, and the first IP address assigned by the first radio network is set in the virtual network device.
Specification