Class-based QoS scheduling of WiMAX networks

WiMAX networks offer quality assurance for various communication services, such as Voice over IP (VoIP), Video on Demand (VoD), File Transfer Protocol (FTP), and Hyper Text Transfer Protocol (HTTP). Over the past few years, communication services, such as streaming audio, video, and multimedia for residential and business users, have experienced rapid growth. This expansion of services causes traffic communication to suffer from congestion and become vulnerable. A scheduling approach, which aims to improve user satisfaction, has thus become more significant for wireless infrastructures. In this work, we present Class-Based QoS Scheduling (CBS), which provides QoS assurances in WiMAX network communication. The proposed scheduling approach focuses on downlink-stream traffic communication to achieve high network performance and QoS guarantees. CBS consists of the three main functions of priority elevation, virtual ranking queues, and class-based packet scheduling. The CBS approach supports diverse types of traffic services to guarantee variability in the communication services of WiMAX. The simulation results illustrated that the proposed scheduling approach exhibited considerably better performance in terms of the throughput and the delay than the other scheduling schemes.