MODELING AND PROVISIONING OF QUALITY OF SERVICE (QOS) IN WIMAX NETWORKS BASED ON IEEE 802.16 STANDARD

Abstract

This study is devoted to the analysis of architecture and mechanisms for Quality of Service (QoS) in wireless networks of the WiMAX standard (IEEE 802.16). The topic is relevant due to the growing demand for high-speed wireless networks supporting multi-user applications with different requirements for data transmission rate and latency. The main objective of the work is to analyze QoS functionality in WiMAX networks and to develop models for evaluating the efficiency of the QoS scheduler in radio channel resource allocation. The research objectives include: studying the structure of WiMAX networks and service classes, developing simulation models using OPNET Modeler 14.0 and eXtended Network Simulator (XNS), configuring service flow parameters, and conducting tests with different types of traffic (UGS, RT-VR, NRT-VR, BE, ERT-VR). The results demonstrated that the QoS scheduler ensures stable operation of latency-sensitive applications (UGS and ERT-VR), while less critical service flows show increased delays and packet losses under higher load. Simulations confirmed the ability to flexibly allocate bandwidth and prioritize service flows in real time. In conclusion, the developed models and methods allow not only the assessment of QoS performance in WiMAX networks but also their application for optimizing real network infrastructures, testing new resource allocation algorithms, and training specialists in wireless technologies. The study opens prospects for further research related to integration with LTE and 5G networks and improving service quality under high user mobility.