Data transmission method, data transmission apparatus and data transmission device

A training and distributing method of machine learning model, performed by a network device side, comprising:

• obtaining, by the network device, an ACK/NACK sequence to be trained, and storing the ACK/NACK sequence to be trained;
• grouping, by the network device, the stored ACK/NACK sequence, performing machine learning model training, and generating a plurality of groups of machine learning models, wherein the machine learning models comprise an autoencoder;
• storing, by the network device, the machine learning models;
• distributing, by the network device, the stored machine learning models to the terminals through an RRC signaling or an MAC CE or a physical layer signaling.

A data transmission method, performed by a network device, comprising:

• obtaining, by the network device, an acknowledgment/negative acknowledgment ACK/NACK sequence to be fed back;
• selecting, by the network device, a machine learning model applied to the ACK/NACK sequence, and transmitting indication information of the selected machine learning model to a terminal, wherein the machine learning model comprises an autoencoder;
• compressing, by the network device, the ACK/NACK sequence through the machine learning model to obtain an indication sequence;
• and
• transmitting, by the network device, the indication sequence to the terminal.