Patent ID: 8693426

Claim:
A communications system for exchange of information between a base station and a terminal by a multicarrier transmission mode using a plurality of subcarriers, the communications system comprising: a base station comprising: a transmission data generator configured to generate dedicated frequency band information indicating which frequency band is to be used for transmission of dedicated data information between the base station and a terminal; and a transmitter configured to transmit the dedicated frequency band information by using a specific frequency band which is set from among a plurality of frequency bands assigned to the communications system, and to transmit dedicated data information by using at least one frequency band which is set from among said plurality of frequency bands; and the terminal comprising a receiver configured to receive the dedicated frequency band information by using the specific frequency band, wherein, at least one unused subcarrier is inserted between said specific frequency band and said at least one frequency band or between two other adjacent frequency bands of said plurality of frequency bands.