Data transmission method and device

Abstract

The invention provides a data transmission method and device. The method comprises steps of encoding a to-be-encoded information bit, so as to obtain an encoded bit sequence with length N, wherein theencoded bit sequence comprises G groups of bit sequence, the G groups of bit sequence are divided according to a preset rule, and G and N are positive integers; interleaving each group of bit sequence separately, so as to obtain G groups of interleaved bit sequence, wherein the G groups of interleaved bit sequence are stored in a sequence corresponding to the G groups of bit sequence; and readingP bits from the stored G groups of interleaved bit sequence in sequence as to-be-transmitted bits, wherein P is a positive integer. Through adoption of the method, an operator only needs to interleave and store interleaved bit sequences before first transmission, directly uses stored bits for HARQ retransmission or repeated transmission each time and avoids multiple times of rate matching and interleaving, so that transmission delay is shortened.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a data transmission method and device. Background technique [0002] Communication systems usually use channel coding to improve the reliability of data transmission and ensure the quality of communication. Codes with good performance in the industry include Polar (polarization) codes and Low Density Parity Check (Low Density Parity Check, LDPC) codes. Polar (polarization) codes are the first channel coding method that can be proved theoretically to "reach" the channel capacity. Polar code is a linear block code whose generator matrix is ​​G N , whose encoding process is is a binary row vector with a length of N (that is, the code length); and here B N is an N×N transposition matrix, such as a bit-reversed transposition matrix; defined as log 2 N matrix F 2 The Kronecker product of x 1 N is the coded bit (also called codeword), with generator...

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Problems solved by technology

[0004] In the above method, rate matching needs to be performed first, and then interleaving is performed. Every time a Hybrid Automatic Repeat reQuest (HARQ) retransmission or repeated transmission is performed, the rate matching + interleaving operation needs to be performed again. Larger extension

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