  A new multiple access (MA) strategy, referred to as non orthogonal multiple
access - Relevant (NOMA-R), allows selecting NOMA when this increases all
individual rates, i.e., it is beneficial for both strong(er) and weak(er)
individual users. This letter provides a performance analysis of the NOMA-R
strategy in uplink networks with statistical delay constraints. Closed-form
expressions of the effective capacity (EC) are provided in two-users networks,
showing that the strong user always achieves a higher EC with NOMA-R. Regarding
the network's sum EC, there are distinctive gains with NOMA-R, particularly
under stringent delay constraints.
