Novel Channel/QoS Aware Downlink Scheduler for Next-Generation Cellular Networks

Abstract

Downlink schedulers play a vital part in the current and next-generation wireless networks. The next generation downlink scheduler should satisfy the demand for different requirements, such as dealing with ultra-dense networks and the need to run real-time (RT) and non-real-time (nRT) applications, with a high quality of service (QoS). Many researchers have developed various schedulers for these, but none have introduced one scheduler to target them all. This paper introduces a novel channel/QoS aware downlink scheduler algorithm, called Advanced Fair Throughput Optimized Scheduler (AFTOS), for ultra-dense networks. AFTOS is a multi-QoS scheduler that aims to maximize system spectrum efficiency and user throughput with enhanced fairness, delay, and packet loss ratio (PLR). It is capable of handling RT and nRT traffic. We developed two new policies, called Adjusted Largest Weighted Delay First (ALWDF) and Fair Throughput Optimized Scheduler (FTOS), for RT and nRT traffic. Then, we joint them to introduce our novel downlink scheduler Advanced Fair Throughput Optimized Scheduler (AFTOS). For evaluating the suggested algorithm, we undertook experiments to decide the ideal parameter value for the proposed approaches and compared the proposed solution to current best practices. The findings prove that the AFTOS algorithm can achieve its objectives, outperforming the alternative techniques.

Comparative Analysis of Max-Throughput and Proportional Fair Scheduling Algorithms in 5G Networks

“…Packet scheduler Proportional Fair prioritizes sending data to the UE with the lowest average throughput value [8]. b. Max-Throughput aims to maximize throughput in the cell by allocating Resource Blocks to the user that can receive the highest throughput or UEs that have the highest data rate value, which is an estimate of the amount of throughput that can be obtained by users [19].…”

Outage Performance of Interference Cancellation-Aided Two-Way Relaying Cognitive Network with Primary TAS/SC Communication and Secondary Partial Relay Selection

“…In the case where d SS 1 PR < d SS 2 PR , we simply change the role of SS 1 by that of SS 2 , and vice versa. Then, considering ultra-dense wireless networks [41,42] where there are a lot of nodes that are between the radio range of SS 1 and SS 2 , they can be considered the potential relays. Among these relays, we focused on the M nodes which are nearer to SS 1 than SS 2 .…”

Device to Device Communication Using Optimized Frequency Spectrum Reuse (OFSR) in Multi-Layered Cellular Network

“…By lowering the combined transmit power levels for D2D pairs and CUs while maintaining the necessary QoS for both user types, the associated base station in our proposed approach optimally distributes the uplink resources for each D2D connection. For each cellular user, we assume orthogonal frequency-division multiple access (OFDMA) for the downlink and single-carrier FDMA (SC-FDMA) for the uplink, where the uplink data is dispersed across numerous sub-carriers (Taha, Haci, & Serener, 2022). Similar to (D. Feng et al, 2013), the base station evaluates the minimum required transmit power levels for the D2D pair and any prospective CU partners before determining if admitting the D2D pair as an underlay of the cellular network would not violate either party's QoS criteria.…”