Communications method and apparatus

A communications apparatus applying low-density parity-check (LDPC), the communications apparatus comprising:

• a processor configured to perform rate matching on Ct code blocks to obtain Ct rate matching output sequences,
• wherein a length E of each rate matching output sequence is based on Ct,
• wherein Ct is a positive integer, and the Ct code blocks correspond to a retransmission sequence of a transport block and comprise M code block groups,
• wherein M is a positive integer and M is less than a quantity of code block groups obtained after the transport block is segmented, wherein the length E satisfies either E=NL·Qm·└G′/Ct┘ or E=NL·Qm·┌G′/Ct┐, depending on a value j corresponding to a code block number,
• wherein G′=G/(NL·Qm), γ=G′ mod Ct, Qm is a modulation order, NL is a quantity of data flows, G is a quantity of available bits used for transmitting the transport block, J corresponds to a code block number;
• and
• interface circuitry configured to output the Ct rate matching output sequences.

A communications apparatus applying low-density parity-check (LDPC), the communications apparatus comprising:

• a processor;
• and
• a memory coupled to the processor and configured to store computer readable programs which, when executed by the processor, cause the communications apparatus to perform:
• performing rate matching on Ct code blocks to obtain Ct rate matching output sequences,
• wherein a length E of each rate matching output sequence is based on Ct,
• wherein Ct is a positive integer, and the Ct code blocks correspond to a retransmission sequence of a transport block and comprise M code block groups,
• wherein M is a positive integer and M is less than a quantity of code block groups obtained after the transport block is segmented,
• wherein the length E satisfies either E=NL·Qm·└G′/Ct┘ or E=NL·Qm·┌G′/Ct┐, depending on a value j corresponding to a code block number, wherein G′=G/(NL·Qm), γ=G′ mod Ct, Qm is a modulation order, NL is a quantity of data flows, G is a quantity of available bits used for transmitting the transport block, j corresponds to a code block number;
• outputting the Ct rate matching output sequences.

A non-transitory, computer readable medium storing one or more instructions that, when executed by a processor in a communications apparatus applying low-density parity-check (LDPC), cause the processor to provide the following operations:

• performing rate matching on Ct code blocks to obtain Ct rate matching output sequences,
• wherein a length E of each rate matching output sequence is based on Ct and the length E satisfies either E=NL·Qm·└G′/Ct┘ or E=NL·Qm·┌G′/Ct┐, depending on a value j of a code block number,
• wherein G′=G/(NL·Qm), Qm is a modulation order, NL is a quantity of data flows, G is a quantity of available bits used for transmitting the transport block,
• wherein Ct is a positive integer, and the Ct code blocks correspond to a retransmission sequence of a transport block and comprise M code block groups, and
• wherein M is a positive integer and M is less than a quantity of code block groups obtained after the transport block is segmented,
• outputting the Ct rate matching output sequences.