Patent ID: 8547933

Claim:
A method for performing handover in a dual-mode terminal, the method comprising: receiving an Internet Protocol (IP) packet from a personal computer (PC), and transmitting the received IP packet to a serving network; upon receiving a handover message from the serving network, stopping reception of the IP packet from the PC; forwarding residual packets from a first processor corresponding to the serving network to a second processor corresponding to a target network; upon handover completion and completion of the forwarding of the residual packets, restarting reception of the IP packet from the PC; and transmitting the residual packets to the target network, wherein the PC and the dual-mode terminal are connected to each other through a Universal Serial Bus (USB) interface coupled to a Long Term Evolution (LTE) interface module, wherein stopping the receiving of the IP packet comprises transmitting a USB negative acknowledgement (NACK) signal, by the LTE interface module, in response to a signal received from the PC, and wherein a communication scheme of the serving network is different from a communication scheme of the target network.