Method and apparatus for transmitting and receiving channel information in wireless communication system

An station device for performing communication in a whitespace band, the station device comprising:

• a transceiver;
• and
• a processor configured to:
• transmit, via the transceiver to a database device, a channel scheduling request frame for querying scheduling information on available channels;
• and
• receive, via the transceiver from the database device, a channel scheduling response frame including the scheduling information on the available channels,
• wherein the channel scheduling response frame includes a channel number field,
• wherein, if a channel availability time field is included in the channel scheduling response frame, a value of the channel availability time field indicates a starting time when a channel indicated by the channel number field is available for operation, and
• wherein, if the channel availability time field is not present in the channel scheduling response frame, the station takes a time that the channel scheduling response frame is received as the starting time.