Wireless communication method, wireless communication system and wireless communication apparatus

Abstract

This invention is directed to reduction of the load in detecting control signals used when using a plurality of frequency bands to perform communications. A wireless communication apparatus (10) transmits a first control signal, which is to be used for a communication performed in a first frequency band, and a second control signal, which is to be used for a communication performed in a second frequency band. A wireless communication apparatus (20) performs, for signals received from the wireless communication apparatus (10), a signal extraction in accordance with a candidate of signal length, thereby detecting the first and second control signals. In this case, the wireless communication apparatus (10) controls, based on the bandwidths of the first and second frequency bands, whether to use the same frequency band to transmit the first and second control signals.