Wireless communication system, terminal, transmission station, and wireless communication program

A terminal comprising:

• a first receiver part which receives information, representing correspondence between a partial region of a data-channel region allocated with a downlink control channel and a parameter used to demodulate the downlink control channel, in connection with a plurality of parameters;
• a second receiver part which receives the downlink control channel allocated to the partial region of the data-channel region;
• and
• a decoding part which decodes the downlink control channel based on a demodulation reference signal generated by a first parameter selected from among a plurality of parameters or which decodes the downlink control channel based on a demodulation reference signal generated by a second parameter selected from among a plurality of parameters when the decoding part fails to perform decoding based on the first parameter.

A wireless communication program adapted to a wireless communication system including an upper transmission station and a lower transmission station, each serving as a transmission station, and a terminal serving as a reception station,

• wherein the wireless communication program causes a computer of the upper transmission station to implement a procedure of allocating a downlink control channel for each terminal to part of a predetermined data-channel region ascribed to the lower transmission station based on a demodulation reference signal for each transmission station, transmitting an allocation result to the lower transmission station, and transmitting the downlink control channel for each terminal, disposed at part of the predetermined data-channel region thereof, based on the allocation result;
• wherein the wireless communication program causes a computer of the lower transmission station to implement a procedure of transmitting the downlink control channel for each terminal, disposed at part of the predetermined data-channel region thereof, based on the allocation result;
• and
• wherein the wireless communication program causes a computer of the terminal to implement a procedure of decoding the downlink control channel based on the demodulation reference signal.