Patent ID: 8472947

Claim:
A call processing system for mobile communication terminals, comprising: a gateway location register configured to generate a Database (DB) for international roaming service subscriber; and a roaming control unit configured to register a location of a mobile communication terminal, to determine whether a call originates using a primary number (primary No.) or a secondary number (secondary No.) in the international roaming service on a basis of originating service provider information and a called number, included in a call origination signal from the mobile communication terminal, and to send a signal corresponding to a result of the determination to a mobile switching center of a network in which the mobile communication terminal is located, wherein the international roaming service assigns the primary number in a home network and assigns the secondary number in a partner network; and wherein when the mobile communication terminal is located in the partner network: the gateway location register acquires a subscriber profile from a home location register in response to a location registration request signal received from the partner network and transmitting the subscriber profile to the partner network; the gateway location register receives an ack message from the partner network; and the roaming control unit updates the location information of the subscriber on a basis of the ack message received from the partner network.