The curves in Fig. 4 show the performance analysis in terms of the system fairness.
Utilities defined by (13) and (14) correspond to the well-established weighted -proportional fairness [6], and are from special interest for operators since they ensure flexible tuning of the system fairness in a wide range.
Figure 5 indicates the IoT system fairness of each scheme.
However, as can be seen from upper figure in Figure 4(a), the system fairness of a conventional PF scheduler is far from optimum.
Originally proposed in the wired network scheduling context, a proportional fair (PF) scheduler promises a trade-off between the maximization of average throughput and system fairness.
That is, already in the simplest case, a reuse-1 network is not giving the best performance from system fairness point of view.
Besides, we propose a fairness analysis tool inspired in portfolio theory to facilitate the study of the existing trade-offs in terms of system performance versus fairness among relays in a realistic scenario where available CSI is subject to delays.
Due Process for Non-union Employees: The Influence of System Characteristics on Fairness Perceptions, Human Resource Management.
How to deal with strangers efficiently is a big challenge for designing P2P systems, as ineffective stranger policies will cause the degradation of system performance and fairness.
