Data transferring method and data receving method

PURPOSE: A data transmission method and a data receiving method are provided to have an improved a data transmission rate by transmitting subcarriers through a plurality of frequency channels excluding a frequency channel. CONSTITUTION: The presence of a frequency band occupied by the outside is determined(S110). The occupied frequency band is detected(S120). Frequency channels used for the transmission of data subcarriers are selected based on the detected frequency band(S130). A request signal including information about the selected frequency channels is transmitted to a data receiving device(S140). The control part generates control screams including the information about the selected frequency channels. A plurality of data symbols and null signals are changed by OFDM(S150). Changed subcarriers are transmitted to the data receiving device(S160).