Performance Analysis of Scheduling Scheme in Multiuser Cooperative Relay Wireless Networks

Scheduling schemes always have impacts on system performances. This paper gives an analysis of Proportional Fairness (PF) and Maximum C/I (MCI) algorithms in downlink multiuser cooperative relay system with decode-and-forward (DF) protocol. Through an approximation of the signal-to-noise ratio (SNR), analytic expressions of system average throughput and fairness index under both scheduling schemes are derived and compared. With the number of users and relays in a single-cell increasing, system performance is simulated. Both the theoretic analysis and simulations show that PF provides higher fairness but lower throughput than MCI. For MCI, more users bring larger system capacity but lower fairness; for PF, more relays have a positive impact on both capacity and user fairness.