VOICE DATA HANDOFF METHOD FROM WIBRO/WLAN NETWORK TO CELLULAR NETWORK IN HETEROGENEOUS NETWORKS ENVIRONMENT

摘要

A voice data handoff method from a WiBro(Wireless Broadband Internet)/WLAN to a cellular network in a heterogeneous network environment is provided to serve as a catalytic technique for activating a wired/wireless integrated voice service. The first MT(Mobile Terminal)(210) registers its location to a cellular network(CDMA2000 access network)(240) in order to determine whether to enter the cellular network(240). The first MT(210) requests handoff from a certain upper node of a WiBro/WLAN(Wibro access network)(230). The certain upper node establishes a circuit voice call of the first MT(210) with the cellular network(240) through a certain upper node of the cellular network(240).