Data Transmission Method and Apparatus

A radio access network device, comprising:

• a processor;
• a transceiver;
• and
• a non-transitory memory unit storing program instructions for execution by the processor, the program instructions including instructions for:
• transmitting downlink control information to a terminal device, wherein the downlink control information indicates a retransmission of a code block group, wherein the code block group is one code block group of a plurality of code block groups of a transport block that the radio access network device transmits to the terminal device, wherein the code block group comprises a plurality of code blocks, and wherein at least one code block in the code block group was not transmitted correctly;
• and
• retransmitting the retransmission of the code block group to the terminal device;
• wherein the downlink control information comprises identification information and indication information, wherein the identification information identifies which code block group of the transport block is retransmitted, and wherein the indication information indicates whether the code block group from a previous transmission is punctured or interfered.

A non-transitory storage medium storing computer program code for execution by a processor of a communication device, the computer program code including instructions for:

• transmitting downlink control information to a terminal device, wherein the downlink control information indicates a retransmission of a code block group, wherein the code block group is one code block group of a plurality of code block groups of a transport block that the communications device transmits to the terminal device, wherein the code block group comprises a plurality of code blocks, and wherein at least one code block in the code block group was not transmitted correctly;
• and
• retransmitting the retransmission of the code block group to the terminal device;
• wherein the downlink control information comprises identification information and indication information, wherein the identification information identifies which code block group of the transport block is retransmitted, and wherein the indication information indicates whether the code block group from a previous transmission is punctured or interfered.