A method for transmitting channel state information, CSI, by a terminal, the method comprising: receiving an indicator requesting a channel state information report of a downlink channel from a base station over a downlink control channel; aperiodically transmitting the CSI to the base station over a physical uplink shared channel, PUSCH, upon receiving the indicator from the base station; and periodically transmitting the CSI to the base station over a physical uplink control channel, PUCCH, wherein the CSI includes a wideband precoding matrix index, PMI, and a subband PMI, the method being characterized in that periodically transmitting the CSI to the base station over the PUCCH comprises: determining a transmission time for transmitting a channel quality indicator, CQI, or a precoding matrix index, PMI, over the PUCCH to the base station, wherein the CQI includes a wideband CQI and a subband CQI, in which the wideband CQI or wideband PMI and the subband CQI or subband PMI are transferred over the PUCCH at different times; and determining a transmission time for transmitting a rank indicator, RI, over the PUCCH to the base station, wherein, when the transmission time for transmitting the RI is the same as the transmission time for transmitting the wideband CQI or the wideband PMI, only the RI is transmitted over the PUCCH. receiving an indicator requesting a channel state information report of a downlink channel from a base station over a downlink control channel; aperiodically transmitting the CSI to the base station over a physical uplink shared channel, PUSCH, upon receiving the indicator from the base station; and periodically transmitting the CSI to the base station over a physical uplink control channel, PUCCH, wherein the CSI includes a wideband precoding matrix index, PMI, and a subband PMI, the method being characterized in that periodically transmitting the CSI to the base station over the PUCCH comprises: determining a transmission time for transmitting a channel quality indicator, CQI, or a precoding matrix index, PMI, over the PUCCH to the base station, wherein the CQI includes a wideband CQI and a subband CQI, in which the wideband CQI or wideband PMI and the subband CQI or subband PMI are transferred over the PUCCH at different times; and determining a transmission time for transmitting a rank indicator, RI, over the PUCCH to the base station, wherein, when the transmission time for transmitting the RI is the same as the transmission time for transmitting the wideband CQI or the wideband PMI, only the RI is transmitted over the PUCCH. determining a transmission time for transmitting a channel quality indicator, CQI, or a precoding matrix index, PMI, over the PUCCH to the base station, wherein the CQI includes a wideband CQI and a subband CQI, in which the wideband CQI or wideband PMI and the subband CQI or subband PMI are transferred over the PUCCH at different times; and determining a transmission time for transmitting a rank indicator, RI, over the PUCCH to the base station, wherein, when the transmission time for transmitting the RI is the same as the transmission time for transmitting the wideband CQI or the wideband PMI, only the RI is transmitted over the PUCCH.