TECHNIQUES FOR DATA TRANSMISSION BASED ON IRREGULAR CONNECTION GRAPHS

摘要

The disclosure relates to a method (900) for data transmission in a communication system, the method comprising: allocating (901) a first plurality (i) of physical resources (SCi) in the communication system for transmission of a second plurality (j) of transmission layers, each transmission layer comprising a bit stream (bj) of a corresponding user equipment (UEj); modulating (902) the second plurality (j) of transmission layers on the first plurality (i) of physical resources (SCi) based on a multidimensional constellation set and a multidimensional connection matrix enabling predefined points on the constellation set to produce a data stream of modulated transmission layers, wherein the connection matrix represents an irregular connection Sparse Code Multiple Access (SCMA) connection graph comprising at least two independent subsections, the connection matrix being constructed based on a set of numbers comprising at least two non-zero values; and transmitting (903) the data stream over the allocated first plurality (i) of physical resources (SCi) in the communication system.