Method of performing harq in wireless communication system

PURPOSE: A HARQ method of a wireless communication system is provided to reduce the decoding complexity of a terminal by reducing a signal overhead of a frame structure. CONSTITUTION: A base station transmits frame structure information to a terminal(S110). The terminal receives a system set signal including frame structure information and HARQ delay information. The terminal recognizes the frame structure by using the frame structure information(S120). A down link sub-frame receives a downlink signal.