Terminal device, base station device, and communication method

A base station apparatus comprising:

• a receiver configured to decode a payload of uplink control information (UCI) and receive the UCI, wherein
• the payload includes at least one of hybrid automatic repeat request-acknowledgement (HARQ-ACK) information, a scheduling request, and channel state information (CSI), and the receiver is further configured to:
• determine a number of first cyclic redundancy check (CRC) bits based on a size of the payload,
• the number of first CRC bits being equal to 0 in a case that the size of the payload is less than 12 bits,
• the number of first CRC bits being equal to 6 in a case that the size of the payload is equal to or larger than 12 bits and less than 20 bits, and
• the number of first CRC bits being equal to 11 in a case that the size of the payload is equal to or larger than 20 bits;
• determine a length of an output sequence of a terminal apparatus performing rate matching of coded bits in the payload based on the size of the payload, the number of first CRC bits, and a maximum coding rate;
• and
• determine a number of second CRC bits which are added to the payload before the payload is coded, based on the size of the payload and the length of the output sequence.

A communication method used for a terminal apparatus, the communication method comprising:

• coding a payload of uplink control information (UCI), the payload comprising at least one of hybrid automatic repeat request-acknowledgement (HARK-ACK) information, a scheduling request, and channel state information (CSI);
• performing rate matching of coded bits in the payload to generate an output sequence;
• and
• transmitting the output sequence, wherein coding the payload of the UCI comprises:
• determining a number of first cyclic redundancy check (CRC) bits based on a size of the payload,
• the number of first CRC bits being equal to 0 in a case that the size of the payload is less than 12 bits,
• the number of first CRC bits being equal to 6 in a case that the size of the payload is equal to or larger than 12 bits and less than 20 bits, and
• the number of first CRC bits being equal to 11 in a case that the size of the payload is equal to or larger than 20 bits;
• determining a length of the output sequence based on the size of the payload, the number of first number CRC bits, and a maximum coding rate;
• and
• determining a number of second CRC bits which are added to the payload before the payload is coded, based on the size of the payload and the length of the output sequence.