  In this paper, a weighted proportional fair (PF) scheduling method is
proposed in the context of non-orthogonal multiple access (NOMA) with
successive interference cancellation (SIC) at the receiver side. The new scheme
introduces weights that adapt the classical PF metric to the NOMA scenario,
improving performance indicators and enabling new services. The distinguishing
value of the proposal resides in its ability to improve long term fairness and
total system throughput while achieving a high level of fairness in every
scheduling slot. Finally, it is shown that the additional complexity caused by
the weight calculation has only a limited impact on the overall scheduler
complexity while simulation results confirm the claimed improvements making the
proposal an appealing alternative for resource allocation in a cellular
downlink system.
