Scheduling PD-NOMA with Round-Robin, Equal-Rate and Proportional-Fair Strategies

The paper discusses the distribution of radio resources for a hybrid communication system adaptively using orthogonal (OMA) and non-orthogonal (NOMA) multiple access, which is the power domain NOMA (PD-NOMA) method. The problem of radio resource allocation in PD-NOMA systems remains topical because the additional degree of freedom (power domain) significantly increases the number of possible approaches, and it is required to find the optimal approach among them. We offer our own approach to radio resource planning and compare it with the existing. Moreover, we use the Monte Carlo simulation to compare the OMA and the hybrid OMA/NOMA systems. The comparison criterion is the amount of transmitted traffic. For the hybrid system, there is a proprietary table of paired signal-code constructions proposed to jointly assign modulation and coding schemes (MCS) to NOMA users and carry out multiplexing in the power domain.