DATA TRANSMISSION METHOD AND DEVICE

摘要

Provided is a data transmission method, comprising: a relay node receiving information about an SCMA codebook used by the relay node and sent by a target node, and receiving two or more source signals sent by two or more source nodes; performing network coding on the two or more received source signals; performing SCMA codebook mapping on the obtained network-coded signals to obtain at least two or more modulation symbols; and sending the at least two or more modulation symbols obtained by means of the SCMA mapping to the target node.