Figure 8

Fair greening simulation results for two-user DSL scenario of Fig. 5a: a Normalized data rate sum performance versus greening for different greening policies, b Normalized data rates (top) and normalized transmit powers (bottom) for two modems (blue: modem 1, red: modem 2) for different greening policies when 50% greening is applied, c Greening fairness index $\mathcal{F}$ (22) versus greening for different greening policies. For Greening 4B and 4C, the values δ = 4 10⁵ and δ = 90 were used, respectively. Weights w _n , $n\in \mathcal{N}$, are fixed at 1.