Resource allocation for NOMA based networks using relays: cell centre and cell edge users

Abstract

Nonorthogonal multiple access (NOMA) transpire out as a solution to revamp the problem of spectral efficiency, allowing some level of interference at receivers. Recently, relays are utilized to improve access of cell edge users. The utilization of relays improves spectral efficiency with reduced outage probability. In this paper, the relays used have the capability of performing successive interference cancellation (SIC) for the users connected to it and regenerates only the signals of the users connected to it. The cell edge users are accessible to the base station in an environment where multiple relays are available, and where the user selects the link with the best channel quality. The user’s mobility is also considered during time sub-slot and used while obtaining the user’s ergodic rate and outage probability in the presence of a higher signal to noise ratio. Simulation results are used to show the performance improvement of the proposed method as compared to available work in literature.