Terminal device, base station device, communication method, and base station device control method

A base station device comprising:

• a transceiver;
• and
• circuitry configured to:
• specify one or more receiving beams selected from among one or more reference signals by a terminal device that has received the one or more reference signals transmitted from the base station device;
• generate association information for associating a combination of a receiving antenna and a receiving beam to be used by the terminal device to receive one or more pieces of control information that is to be transmitted to the terminal device, with a combination of a receiving antenna and a receiving beam used by the terminal device for the reception of the one or more reference signals;
• and
• transmit the association information to the terminal device.

A communication method to be executed by a terminal device equipped with a plurality of antenna, the communication method comprising:

• receiving one or more reference signals from a base station via the plurality of antennas;
• selecting one or more receiving beams corresponding to the one or more reference signals received from the base station;
• and
• setting reception environment information to be used by the terminal device for receiving one or more pieces of control information to be transmitted from the base station, based on reception environment information used to receive the one or more reference signals.

A control method to be executed by a base station device, the control method comprising:

• specifying one or more receiving beams selected from among one or more reference signals by a terminal device that has received the one or more reference signals transmitted from the base station device;
• generating association information for associating a combination of a receiving antenna and a receiving beam to be used by the terminal device to receive one or more pieces of control information that is to be transmitted to the terminal device, with a combination of a receiving antenna and a receiving beam used by the terminal device for the reception of the one or more reference signals;
• and
• transmitting the association information to the terminal device.