a wireless communication device for carrying out wireless communication using one of a plurality of channels, wherein

for at least some of the plurality of channels, an energy threshold value is set for each channel in order to determine whether or not a respective channel is busy, and wherein an energy threshold value that has been set in at least one channel, in the at least some of the plurality channels is different from an energy threshold value set in other channels of the at least some of the plurality of channels; and wherein, among selectable communication speed setting values are determined for the at least some of the plurality of channels based on the energy threshold values, and a selectable communication speed setting value, that has been determined in at least one channel, in the at least some of the plurality of channels, is different from a selectable communication speed setting value determined in other channels of the at least some of the plurality of channels.