Feedback information sending method, feedback information receiving method, access network device, and terminal

A method comprises:

• receiving, by a terminal device within a first transmission time interval (TTI), a transport block (TB) sent by an access network device, wherein the TB comprises at least two code blocks (CBs), and wherein the at least two CBs comprise a first part of the CBs and a second part of the CBs;
• and
• sending, by the terminal device, first feedback information to the access network device within a third TTI when the terminal device receives the second part of the CBs sent by the access network device and does not receive the first part of the CBs within a second TTI,
• wherein the first feedback information indicates whether the terminal device correctly decoded the first part of the CBs received within the first TTI and the second part of the CBs received within the second TTI,
• wherein the second TTI is in a receive time window after the first TTI, and
• wherein the terminal device uses the receive time window to determine a maximum duration for waiting for the access network device to send the second part of the CBs after the first TTI.

A terminal device comprising:

• a receiver configured to receive, within a first transmission time interval (TTI), a transport block (TB) sent by an access network device, wherein the TB comprises at least two code blocks (CBs), and wherein the at least two CBs comprise a first part of the CBs and a second part of the CBs;
• and
• a transmitter configured to send first feedback information and second feedback information to the access network device only when the receiver receives the second part of the CBs and does not receive the first part of the CBs within a second TTI,
• wherein the first feedback information indicates whether the terminal device correctly decoded the first part of the CBs, wherein the second feedback information indicates whether the terminal device correctly decoded the second part of the CBs, and wherein the second TTI is after the first TTI in a time sequence.