A user equipment (UE), configured to transmit data on a physical shared channel, transmits the data using the allocated first physical shared channel to the base station, the data may be transmitted repeatedly as much as the number of the first physical shared channel on a physical shared channel group including a predetermined number of the first physical shared channels, a first dedicated demodulation-Reference Signal (DMRS) for the data may be mapped to a symbol constructing the physical shared channel group according to the mapping information and transmitted to the base station, and the mapping information may be information for mapping a second DMRS for a second physical shared channel including symbols of a same number as a symbol number constructing the physical shared channel group.