Base station, terminal, transmission method, and reception method

A terminal which receives control information in one of a first resource region and a second resource region provided in order in a time direction in a subframe, the terminal comprising:

• determining section that determines whether a subframe to be determined is a first type subframe in which the control information is mapped only to the first resource region or a second type sub frame in which the control information is mapped to both the first resource region and the second resource region in accordance with a configuration pattern which is applied to the terminal and is one of a plurality of configuration patterns having different downlink and uplink subframe configurations in time-division multiplex;
• and
• specifying section that specifies a mapping region candidate, to which the control information is mapped, in the first resource region or the second resource region in the subframe to be determined on the basis of the determination result by the determining section.

A transmission method which maps control information to one of a first resource region and a second resource region provided in order in a time direction in a subframe and transmits the control information, the transmission method comprising the steps of:

• determining whether a subframe to be determined is a first type subframe in which the control information is mapped only to the first resource region or a second type subframe in which the control information is mapped to both the first resource region and the second resource region in accordance with a configuration pattern which is applied to the base station and is one of a plurality of configuration patterns having different downlink and uplink subframe configurations in time-division multiplex;
• and
• deciding a mapping region, to which the control information is mapped, in the first resource region or the second resource region in the subframe to be determined on the basis of the result of the determination.

A reception method which receives control information in one of a first resource region and a second resource region provided in order in a time direction in a subframe, the reception method comprising the steps of:

• determining whether a sub frame to be determined is a first type subframe in which the control information is mapped only to the first resource region or a second type subframe in which the control information is mapped to both the first resource region and the second resource region in accordance with a configuration pattern which is applied to the base station and is one of a plurality of configuration patterns having different downlink and uplink subframe configurations in time-division multiplex;
• and
• specifying a mapping region candidate, to which the control information is mapped, in the first resource region or the second resource region in the subframe to be determined on the basis of the result of the determination.