Hierarchical Downlink Resource Management Framework for OFDMA based WiMAX Systems

Hua Wang, Villy Bæk Iversen

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Abstract

IEEE 802.16, known as WiMAX, has received much attention for its capability to support multiple types of applications with diverse QoS requirements. Beyond what the standard has defined, radio resource management (RRM) still remains an open issue. In this paper, we propose a hierarchical downlink resource management framework for OFDMA based WiMAX systems. Our framework consists of a dynamic resource allocation (DRA) module and a connection admission control (CAC) module. DRA emphasizes on how to share the limited radio resources in term of subchannels and time slots among WiMAX subscribers belonging to different service classes with the objective of increasing the spectral efficiency while satisfying the diverse QoS requirements in each service class. CAC highlights how to limit the number of ongoing connections preventing the system capacity from being overused. Through system-level simulation, it is shown that the proposed framework can work adaptively and efficiently to improve the system performance in terms of high spectral efficiency and low outage probability.
Original languageEnglish
Title of host publicationProceeding of IEEE WCNC 2008
PublisherIEEE
Publication date2008
Pages1709-1715
ISBN (Print)978-1-4244-1996-8
DOIs
Publication statusPublished - 2008
Event2008 IEEE Wireless Communications & Networking Conference - Las Vegas, United States
Duration: 31 Mar 20083 Apr 2008
https://ieeexplore.ieee.org/xpl/conhome/4489030/proceeding

Conference

Conference2008 IEEE Wireless Communications & Networking Conference
Country/TerritoryUnited States
CityLas Vegas
Period31/03/200803/04/2008
Internet address

Bibliographical note

Copyright: 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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