User terminal and radio communication method

A radio communication method for a terminal, comprising:

• receiving a transport block (TB) including one or more codeblock groups (CBGs), the CBG including one or more codeblocks;
• and
• controlling transmission of retransmission control information that indicates an ACK or a NACK per CBG;
• wherein when at least one CBG in the TB is retransmitted and even if there is at least one CBG, other than the retransmitted CBG, in the TB that is not retransmitted, the terminal, in response to all of the CBGs in the TB, controls transmission of ACKs for all CBGs that are successfully decoded and NACKs for all CBGs that have failed in decoding before retransmission of the CBG among all of the CBGs in the TB.

A base station comprising:

• a transmitter that transmits a transport block (TB) including one or more codeblock groups (CBGs), the CBG including one or more codeblocks;
• and
• a processor that controls reception of retransmission control information that indicates an ACK or a NACK per CBG,
• wherein, when at least one CBG in the TB is retransmitted and even if there is at least one CBG, other than the retransmitted CBG, in the TB that is not retransmitted, the processor, in response to all of the CBGs in the TB, controls reception of ACKs for all CBGs that are successfully decoded and NACKs for all CBGs that have failed in decoding before retransmission of the CBG among all of the CBGs in the TB.

A system comprising a terminal and a base station, wherein:

• the terminal comprises:
• a receiver that receives a transport block (TB) including one or more codeblock groups (CBGs), the CBG including one or more codeblocks;
• and
• a processor that controls transmission of retransmission control information that indicates an ACK or a NACK per CBG,
• wherein, when at least one CBG in the TB is retransmitted and even if there is at least one CBG, other than the retransmitted CBG, in the TB that is not retransmitted, the processor of the terminal, in response to all of the CBGs in the TB, controls transmission of ACKs for all CBGs that are successfully decoded and NACKs for all CBGs that have failed in decoding before retransmission of the CBG among all of the CBGs in the TB, and
• the base station comprises:
• a transmitter that transmits the TB including one or more CBGs;
• and
• a processor that controls reception of the retransmission control information that indicates an ACK or a NACK per CBG,
• wherein, when at least one CBG in the TB is retransmitted and even if there is at least one CBG, other than the retransmitted CBG, in the TB that is not retransmitted, the processor of the base station, in response to all of the CBGs in the TB, controls reception of ACKs for all CBGs that are successfully decoded and NACKs for all CBGs that have failed in decoding before retransmission of the CBG among all of the CBGs in the TB.