Base station, communication terminal, transmission method and reception method

A transmission apparatus comprising:

• a frequency scheduling unit configured to assign at least one resource block to individual communication terminals, wherein a frequency band provided to a communication system includes a plurality of frequency blocks each of which includes a plurality of resource blocks;
• and
• a first generation unit configured to generate a data channel for a communication terminal to which at least one resource block is assigned in the frequency scheduling unit;
• a second generation unit configured to generate a specified control channel for a communication terminal, on a terminal-by-terminal basis, to which at least one resource block is assigned in the frequency scheduling unit;
• a third generation unit configured to generate an unspecified control channel common to communication terminals to which at least one resource block is assigned in the frequency scheduling unit;
• a fourth generation unit configured to generate a broadcast channel including broadcast information to be reported to a communication terminal;
• a multiplexing unit configured to arrange the broadcast channel generated in the fourth generation unit on a frequency block which includes a center frequency among the plurality of frequency blocks included in the frequency band provided to the communication system, and to arrange the unspecified control channel generated in the third generation unit, at least one specified control channel generated in the second generation unit and at least one data channel generated in the first generation unit over the plurality of frequency blocks included in the frequency band provided to the communication system;
• and
• a transmission unit configured to transmit an output signal of the multiplexing unit, wherein the multiplexing unit is able to use, for the data channel, a localized scheme in which consecutive resource blocks are assigned and a distributed scheme in which resource blocks corresponding to a plurality of frequency components intermittently are assigned.