Patent ID: 7929990

Claim:
A radio communication terminal comprising: a detection unit configured to detect a plurality of usable frequencies of a frequency range, in which the radio communication terminal plans to transmit, at least depending on whether or not a power of a first received signal is greater than a first threshold; a selection unit configured to select, when a first frequency band from f 0 +f 1 to f 0 +f 1 +Δf 1 (f 1 is a first frequency, and Δf 1 is a first bandwidth) and a second frequency band from f 0 −f 1 −Δf 1 to f 0 −f 1 are simultaneously usable with respect to a center frequency f 0 of a utilizing frequency range including the usable frequencies, the first frequency band and the second frequency band as a pair of utilizing frequency bands; and a transmission unit configured to transmit different signals in the pair of utilizing frequency bands.