A Novel Downlink Handover-Based Priority Scheduling for Providing Seamless Mobility and QoS in IEEE 802.16 BWA System

Fehri, Hamed; Monemizadeh, Mostafa

doi:10.22034/cas.2025.220709

A Novel Downlink Handover-Based Priority Scheduling for Providing Seamless Mobility and QoS in IEEE 802.16 BWA System

Document Type : Original Article

Authors

Hamed Fehri ¹

Mostafa Monemizadeh ²

¹ Department of Electrical Engineering, Faculty of Engineering, University of Zabol, Zabol, Iran

² Department of Electrical Engineering, University of Neyshabur, Neyshabur, Iran

https://doi.org/10.22034/cas.2025.220709

Abstract

In IEEE 802.16 wireless metropolitan area networks, users can take their broadband connections with them as they move from one location to another with different speeds. Thus, providing seamless handovers and QoS (Quality-of-Service) is challenging, especially for mobile subscribers at vehicular speeds. On the other hand, time variability and unpredictability of the wireless channel may cause QoS degradation and handover losses for these users. This paper proposes a new downlink handover-based priority scheduling scheme for different scheduling services which is providing lossless handovers and QoS. Taking the power degradation rates into consideration that enables monitoring users' locations, speeds and accelerations, this scheme assigns higher priority to the users having higher probability performing handover in the near future. An AMC (Adaptive Modulation and Coding) scheme and a pre-selection method are also proposed for providing high system performance, i.e., higher system throughput and lower packet dropping rate. The analytical results show the efficiency of proposed scheme.

Graphical Abstract