The Impact of Resource Blocks Schedulers and Modulations on Downlink Performance of LTE-Based 5G Networks
Authors: SOUZA, D.F., ABRAHÃO, D.C., VIEIRA, F.H.T, BORGES, V.C.M.
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With the development of the next generation of mobile communications systems for 5G, several technologies are being studied in order to reach the new requirements in new application scenarios. Among them, is the use of new modulations with higher spectral eficiency in substitution of OFDM, such as F-OFDM and UFMC, and also the scheduling algorithms which are in charge of sharing resources between users. In this article, we evaluated the application of F-OFDM and UFMC, 5G modulations candidates, on LTE downlink as compared to OFDM and evaluated the Round Robin, QoS Guaranteed and PSO schedulers dealing with additional resources provided by the tested modulations. To reach this, we compared performance considering parameters like fairness, latency, throughput and spectral eficiency. The results showed that the downlink LTE improved performance in all evaluated parameters with UFMC modulation. In fact, there was a performance improvement in all the schedulers evaluated. For example, PSO based scheduler improved latency and throughput while QoS Guaranteed reached the lowest loss, and the highest fairness were reached by QoS Guaranteed and Round Robin.