Data retransmission method based on a code block group

A data retransmission method based on a code block group, suitable for uplink transmission, to send a transport block to a receiving end, comprising:

• configuring parameters associated with transmission without a dynamic grant (TWG), enabling the TWG, and configuring a size of each of a plurality of physical resources corresponding to the initial transmission, by receiving a control signaling;
• configuring a quantity of at least one code block group comprised in the transport block by receiving the control signaling;
• configuring a plurality of physical resource groups by receiving the control signaling;
• wherein each of the physical resource groups corresponds to different rounds of transmission;
• configuring a quantity of a plurality of physical resources comprised in each of the physical resource groups according to different quantities of the at least one code block group by receiving the control signaling;
• wherein each of the physical resources corresponds to different quantities of the at least one code block group that was erroneously sent;
• selecting the physical resources comprised in one of the physical resource groups corresponding to the initial transmission to send the transport block;
• determining the quantity of the at least one code block group that was erroneously sent in the transport block according to the response from the receiving end;
• selecting one of the physical resources in one of the physical resource groups corresponding to the retransmission to send the at least one code block group that was erroneously sent according to the quantity of the at least one code block group that was erroneously sent in the transport block;
• not completing the retransmission until confirming that all of the code block groups in the transport block have been successfully sent;
• configuring the quantity of the physical resources comprised in each of the physical resource groups according to the different quantities of the at least one code block group and different quantities of a plurality of code blocks comprised in each code block group by receiving the control signaling;
• wherein the physical resources comprised in each of the physical resource groups correspond to different quantities of the at least one code block group that was erroneously sent in the transport block and different quantities of the code blocks comprised in each code block group;
• determining a size of an actual transport block according to the size of each of the physical resources corresponding to the initial transmission;
• wherein the size of the actual transport block is not greater than the size of each of the physical resources corresponding to the initial transmission;
• determining the quantity of code blocks comprised in each code block group according to the size of the actual transport block and the quantity of the at least one code block group comprised in the transport block;
• selecting the physical resources comprised in one of the physical resource groups corresponding to the initial transmission to send the actual transport block;
• determining the quantity of the at least one code block group that was erroneously sent in the actual transport block according to the response from the receiving end;
• selecting the physical resource comprised in the physical resource group corresponding to the retransmission to send the at least one code block group that was erroneously sent in the actual transport block according to the quantity of the at least one code block group that was erroneously sent in the actual transport block and the quantity of the code blocks comprised in each code block group;
• and
• not completing the retransmission until confirming that all of the code block groups in the actual transport block have been successfully sent.