and F far-users (FUs) and switch between orthogonal multiple access (OMA) and non-
orthogonal multiple access (NOMA) signaling so as to improve the performance of the FUs
significantly, while ensuring that the performance of NUs does not degrade below that
achieved by OMA alone. We derive a closed-form expression for outage probability of the
FU. Assuming that the selected near-user employs successive interference cancellation …