Patent ID: 8792411

Claim:
A method for transmitting, by a relay station, a control signal for the relay station in a wireless communication system, the method comprising: generating a modulation symbol of uplink control information; mapping the generated modulation symbol to a backhaul subframe, excluding a guard time in the backhaul subframe, to which a relay physical uplink control channel (R-PUCCH) is assigned, wherein the guard time is assigned at a start of the backhaul subframe and at an end of the backhaul subframe, and wherein the guard time is used for a mode transition of the relay station from a transmission mode to a reception mode or from the reception mode to the transmission mode; applying an orthogonal cover (OC) sequence to a single carrier frequency division multiple access (SC-FDMA) symbol to which the modulation symbol is mapped among SC-FDMA symbols constituting the backhaul subframe; and transmitting the backhaul subframe, wherein the backhaul subframe includes two slots, wherein the generated modulation symbol is mapped to the two slots according to the same pattern, and wherein a length of the OC sequence is determined according to a number of SC-FDMA symbols to which the modulation symbol is mapped in one slot.