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A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, the communication system includes a transmission data generator configured to generate frequency band information indicating which frequency ba

A communications system for exchange of information between communications apparatuses by a multicarrier transmission mode using a plurality of subcarriers, the communication system includes a transmission data generator configured to generate frequency band information indicating which frequency band is to be used for transmission of data information between said communication apparatuses and a transmitter configured to transmit the frequency band information by using a specific frequency band which is set from among a plurality of frequency band assigned to the communications system, and to transmit data information by using at least one frequency band set from among said plurality of frequency bands; and a receiver configured to receive the frequency band information by using the specific frequency band, wherein bandwidths of said plurality of frequency bands are made a predetermined value, and also numbers of subcarriers in each of the bands are made a predetermined value.

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1. 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

1. 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; anda 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; anda terminal comprising: a receiver configured to receive the frequency band information by using the specific frequency band,wherein bandwidths of the plurality of frequency bands assigned to the communications system are made a predetermined value, and also numbers of subcarriers in each of the plurality of frequency bands assigned to the communications system are made a predetermined value. 2. 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; anda 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 the plurality of frequency bands; anda terminal comprising: a receiver configured to receive the dedicated frequency band information by using the specific frequency band,wherein bandwidth of each of the plurality of frequency bands assigned to the communications system is made a predetermined value, and also bandwidth of each of the subcarriers in each of the plurality of frequency bands assigned to the communications system is made a predetermined value. 3. 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; anda 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 the plurality of frequency bands; anda terminal comprising: a receiver configured to receive the dedicated frequency band information by using the specific frequency band,wherein the number of the subcarriers in each of the plurality of frequency bands assigned to the communications system is made a predetermined value. 4. A base station for exchange of information with a terminal in a communications system by a multicarrier transmission mode using a plurality of subcarriers, the 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; anda 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 the plurality of frequency bands;wherein, bandwidths of the plurality frequency bands assigned to the communications system are made a predetermined value, and also numbers of subcarriers in each of the plurality of frequency bands assigned to the communications system are made a predetermined value. 5. A terminal for exchange of information with a base station in a communications system by a multicarrier transmission mode using a plurality of subcarriers, the terminal comprising: a receiver configured to receive 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, transmitted from a base station by using a specific frequency band which is set from among a plurality of frequency bands assigned to the communications system and receive dedicated data information transmitted from the base station by using at least one frequency band which is set from among the plurality of frequency bands and receive dedicated data information transmitted from the base station by using at least one frequency band which is set from among the plurality of frequency bands,wherein, bandwidths of the plurality frequency bands assigned to the communications system are made a predetermined value, and also numbers of subcarriers in each of the plurality of frequency bands assigned to the communications system are made a predetermined value. 6. A base station for exchange of information with a terminal in a communications system by a multicarrier transmission mode using a plurality of subcarriers, the 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; anda 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 the plurality of frequency bands;wherein, bandwidth of each of the plurality of frequency bands assigned to the communications system is made a predetermined value, and also bandwidth of each of the subcarriers in each of the plurality of frequency bands assigned to the communications system is made a predetermined value. 7. A terminal for exchange of information with a base station in a communications system by a multicarrier transmission mode using a plurality of subcarriers, the terminal comprising: a receiver configured to receive 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, transmitted from a base station by using a specific frequency band which is set from among a plurality of frequency bands assigned to the communications system and receive dedicated data information, transmitted from the base station by using at least one frequency band which is set from among the plurality of frequency bands and receive dedicated data information transmitted from the base station by using at least one frequency band which is set from among the plurality of frequency bands,wherein, bandwidth of each of the plurality of frequency bands assigned to the communications system is made a predetermined value, and also bandwidth of each of the subcarriers in each of the plurality of frequency bands assigned to the communications system is made a predetermined value. 8. A base station for exchange of information with a terminal in a communications system by a multicarrier transmission mode using a plurality of subcarriers, the 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 the plurality of frequency bands; wherein, the number of the subcarriers in each of the plurality of frequency bands assigned to the communications system is made a predetermined value. 9. A terminal for exchange of information with a base station in a communications system by a multicarrier transmission mode using a plurality of subcarriers, the terminal comprising: a receiver configured to receive 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, transmitted from a base station by using a specific frequency band which is set from among a plurality of frequency bands assigned to the communications system and receive dedicated data information transmitted from the base station by using at least one frequency band which is set from among the plurality of frequency bands and receive dedicated data information transmitted from the base station by using at least one frequency band which is set from among the plurality of frequency bands,wherein, the number of the subcarriers in each of the plurality of frequency bands assigned to the communications system is made a predetermined value.