“…Regarding scheduling, we can distinguish, as shown in Figure 5, two types of schedulers: a) the non-opportunistic schedulers are those who do not take into account the state of the channel we cite the best known, the RRs that ensure fairness and WRRs based on fixed weights and b) the opportunistic schedulers are those that take into account the channel state (Ball et al, 2005) (Mohammud Z. et al, 2010) an example is the MAXSNR which first selects the MSSs that have the maximum SIR. In (Ball et al, 2005), the authors present an algorithm called TRS that removes from queues MSSs with the SNR that is below a certain threshold.…”