Method and apparatus for changing frequency band used for communication between devices supporting multiple frequency bands

An apparatus for changing a frequency band used for communication between a first device and a second device, the first and the second devices supporting multiple frequency bands, the apparatus comprising:

• a transmission unit which transmits a frequency band change request frame for requesting a change in a frequency band currently being used for communication between the first and the second devices, to the second device, wherein the frequency band change request frame comprises information regarding a communication capability of the first device and a frequency band change request;
• a reception unit which receives a frequency band change response frame corresponding to the frequency band change request frame, from the second device;
• and
• a frequency band change unit which selectively changes the frequency band currently being used to another frequency band based on the received frequency band change response frame,
• wherein the frequency band change response frame comprises information regarding whether to accept or reject the frequency band change request of the frequency band change request frame.