A method for transmitting control information related to a hybrid automatic repeat request (HARQ) process operation using a frequency division duplex (FDD) frame structure by a base station (BS) in a wireless communication system; the BS therefore; a method for receiving control information related to a HARQ process operation using a FDD frame structure by an RN; and the RN therefore are discussed. The method for transmitting control information according to one embodiment includes transmitting information related to a number of HARQ processes. The HARQ processes are sequentially assigned to subframes configured for the RN-to-the BS transmission. If a subframe configured for the BS-to-the RN transmission is a subframe n, a subframe configured for the RN-to-the BS transmission is a subframe n+4. The method further includes transmitting a HARQ ACK/NACK signal for uplink data through a corresponding subframe based on the number of HARQ processes.