Patent ID: 7596120
Filing Date: 2009-09-29
Classification: H04W

Abstract:
1. A multiple mode terminal supporting handoff between heterogeneous networks, the multiple mode terminal comprising: a mode controller for using network state monitoring information and controlling the handoff between a plurality of networks; an application service unit comprising protocols providing appropriate data communication services for the plurality of networks, and a plurality of programs designed to perform data communication services; a plurality of device drivers controlling the multiple mode terminal to perform a function for the data service in the plurality of networks; a common link module for performing the handoff between the heterogeneous networks by a handoff request of the mode controller, updating a transmission path of the data packet which is connected with one of the plurality of the device drivers according to the performed handoff, and supporting a data communication service of the application service unit through the transmission path; a control module for selecting a network providing an optimum communication service to the multiple mode terminal from among a plurality of accessible networks based on the network state monitoring information, and transmitting the handoff request to the common link module; and a plurality of network access modules for controlling operations of the plurality of device drivers and performing authentication of the multiple mode terminal in order to perform the handoff to a network selected by the control module.