Abstract: Provided are a data transmission method and device and a storage medium. The method includes selecting a first number of bits from a to-be-transmitted information bit sequence to form a to-be-coded bit sequence of a retransmitted data block; polar-coding the to-be-coded bit sequence of the retransmitted data block to obtain a coded bit sequence; combining the coded bit sequence with a coded first-transmission data block to obtain the current to-be-transmitted data block; and performing digital baseband modulation on the current to-be-transmitted data block and then sending the modulated current to-be-transmitted data block to a second communication node.

Abstract: An information bit determination method and a mapping relationship generation method for polar-coded modulation, and devices thereof are provided. The information bit determination method includes: providing a mapping relationship table for a predefined polar-coded modulation scheme, the mapping relationship table at least including target rates, modulation orders and first parameters of a polar code/component code under different MCS indices; determining the quantity of information bits in each polar code/component code in a target polar-coded modulation system in accordance with the mapping relationship table; and determining an information bit set corresponding to each polar code/component code in accordance with the quantity of information bits in each polar code/component code in the target polar-coded modulation system, the information bit set being used to indicate a set of positions of the information bits.