Method of handover for dtm

A handover performance method applied to a DTM(Dual Transfer Mode) is provided to be capable of carrying out effectual handover by using priority of a CS(Circuit Switched) channel and a PS(Packet Switched) channel, when DTM handover occurs in a mobile communication system. Priority between a CS connection and a PS connection is set for DTM handover(S21-S24). A handover command message is received from the first base station(S25). Handover is carried out to the second base station on the basis of the set priority(S26). If the PS connection is preferred, handover related to the PS connection is performed(S27). After performing the handover related to the PS connection, handover related to the CS connection is performed(S28).