Patent ID: 7953045

Claim:
A control method for a mobile terminal which connects to a router through at least one interface, the method comprising: receiving a router advertisement message from the router through a first interface; determining whether prefix information of the received router advertisement message is identical with prefix information of a preset internet protocol (IP) configuration reuse group including the first interface and one or more other interfaces, wherein each of the interfaces has been selected by a user to share an IP address set for one of the interfaces at a time of a vertical handover performed between heterogeneous networks among interfaces having the same prefix, and thus an identifier of the mobile terminal is maintained at the time of the vertical handover; determining whether the first interface corresponds to a highest priority interface in the preset IP configuration reuse group when the prefix information of the reset IP configuration reuse group is identical to the prefix information of the received router advertisement message; and generating a IP configuration of the first interface when the prefix information of the preset IP configuration reuse group is identical to the prefix information of the received router advertisement message and when the first interface corresponds to the highest priority interface and otherwise deferring the generating of the IP configuration of the first interface when the first interface does not correspond to the highest priority interface.