Data transmission method, apparatus, and system

A data transmission apparatus comprising:

• a processor;
• and
• a memory coupled to the processor to store instructions, which when executed by the processor, cause the processor to perform operations, the operations including:
• performing polar encoding on a mother code having a length of N bits long;
• performing rate matching on the mother code to obtain M encoded bits and N−M unsent bits, wherein N is m raised to a power of an integer, m is a positive integer greater than 1, M is a positive integer, and N>M;
• transmitting, by the processor, the M encoded bits;
• generating the to-be-sent bit sequence, wherein the to-be-sent bit sequence comprises one or more bits in the N−M unsent bits;
• and
• sending the generated to-be-sent bit sequence in response to receiving a negative acknowledgement, wherein
• when m{circumflex over ( )}ceil (logmM)−M<=Pt, a value of a length of the to-be-sent bit sequence is min(m{circumflex over ( )}(ceil (logmM)+1), Nmax);
• or
• when a length N of the mother code is selected based on a threshold of a quantity of punctured bits Pt to meet the following conditions:
• N/2−M≤Pt, and N−M≥Pt, a value of the length N of the mother code is min (m{circumflex over ( )}(ceil(logmM)+1), Nmax), wherein Pt is a threshold of a quantity of punctured bits, and Nmax is a maximum length of the mother code.

A non-transitory machine-readable medium having instructions stored therein, which when executed by a processor, cause the processor to perform operations, the operations comprising:

• performing polar encoding on a mother code having a length of N bits long;
• performing rate matching on the mother code to obtain M encoded bits and N−M unsent bits, wherein N is m raised to a power of an integer, m is a positive integer greater than 1, M is a positive integer, and N>M;
• transmitting the M encoded bits;
• generating the to-be-sent bit sequence, wherein the to-be-sent bit sequence comprises one or more bits in the N−M unsent bits;
• and
• sending the generated to-be-sent bit sequence in response to receiving a negative acknowledgement, wherein
• when m{circumflex over ( )}ceil (logmM)−M<=Pt, a value of a length of the to-be-sent bit sequence is min (m{circumflex over ( )}(ceil (logmM)+1), Nmax);
• or
• when a length N of the mother code is selected based on a threshold of a quantity of punctured bits Pt to meet the following conditions:
• N/2−M≤Pt, and N−M≥Pt, a value of the length N of the mother code is min (m{circumflex over ( )}(ceil (logmM)+1), Nmax), wherein Pt is a threshold of a quantity of punctured bits, and Nmax is a maximum length of the mother code.