Heterogeneous NOMA with Energy Cooperation

In this chapter, the problem of resource allocation in heterogeneous non-orthogonal multiple access (NOMA) with energy cooperation is discussed. In particular, the focus is on maximizing the energy efficiency and deriving its optimal user association and power control solution subject to users’ rate and energy constraints. The results confirm the proposed joint user association and power control scheme is capable of achieving higher energy efficiency compared with the conventional resource allocation schemes. This chapter is structured as follows. Section 10.1 presents a review of the related literature about NOMA heterogeneous networks and energy cooperation, respectively. Section 10.2 presents the system model and the formulation problem. After that, Sects. 10.3 and 10.4 describe the proposed resource allocation scheme and provide simulation results, respectively. Finally, Sect. 10.5 summarizes the chapter and presents the future works.