A method for transmitting reference signals and uplink signals to a receiver, wherein the uplink signals include ACK/NACK signals, control signals other than the ACK/NACK signals, and data signals, the method comprising: mapping the reference signals on predetermined time domain units of a 2-dimensional resource region, the 2-dimensional resource region including a plurality of time domain units and a plurality of frequency domain units; serially multiplexing the control signals and the data signals while the ACK/NACK signals are not multiplexed; mapping the multiplexed signals to the 2-dimensional resource region such that the multiplexed signals are mapped to the 2-dimensional resource region starting from the first to the last time domain units at the first frequency domain unit, and the first to the last time domain units at the second frequency domain unit, and so on, until all of the multiplexed signals are mapped; mapping the ACK/NACK signals at both time domain units adjacent to the predetermined time domain units on which the reference signals are mapped, wherein the ACK/NACK signals overwrite a part of the multiplexed signals; and transmitting the reference signals and the uplink signals mapped to the 2-dimensional resource region to the receiver, wherein said transmitting comprises: performing a discrete fourier transform, DFT, for the uplink signals mapped on the 2-dimensional resource region and retrieved from the 2-dimensional resource region in a unit of each time domain unit of the 2-dimensional resource region in accordance with each index of the plurality of frequency domain units; performing an inverse fast fourier transform IFFT for the DFT performed uplink signals and attaching a cyclic prefix CP thereto; and transmitting the uplink signals attached with the CP as single carrier frequency division multiplexing access SC-FDMA symbols. mapping the reference signals on predetermined time domain units of a 2-dimensional resource region, the 2-dimensional resource region including a plurality of time domain units and a plurality of frequency domain units; serially multiplexing the control signals and the data signals while the ACK/NACK signals are not multiplexed; mapping the multiplexed signals to the 2-dimensional resource region such that the multiplexed signals are mapped to the 2-dimensional resource region starting from the first to the last time domain units at the first frequency domain unit, and the first to the last time domain units at the second frequency domain unit, and so on, until all of the multiplexed signals are mapped; mapping the ACK/NACK signals at both time domain units adjacent to the predetermined time domain units on which the reference signals are mapped, wherein the ACK/NACK signals overwrite a part of the multiplexed signals; and transmitting the reference signals and the uplink signals mapped to the 2-dimensional resource region to the receiver, wherein said transmitting comprises: performing a discrete fourier transform, DFT, for the uplink signals mapped on the 2-dimensional resource region and retrieved from the 2-dimensional resource region in a unit of each time domain unit of the 2-dimensional resource region in accordance with each index of the plurality of frequency domain units; performing an inverse fast fourier transform IFFT for the DFT performed uplink signals and attaching a cyclic prefix CP thereto; and transmitting the uplink signals attached with the CP as single carrier frequency division multiplexing access SC-FDMA symbols. performing a discrete fourier transform, DFT, for the uplink signals mapped on the 2-dimensional resource region and retrieved from the 2-dimensional resource region in a unit of each time domain unit of the 2-dimensional resource region in accordance with each index of the plurality of frequency domain units; performing an inverse fast fourier transform IFFT for the DFT performed uplink signals and attaching a cyclic prefix CP thereto; and transmitting the uplink signals attached with the CP as single carrier frequency division multiplexing access SC-FDMA symbols.