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Performance evaluation of MIMO downlink WiMAX for different schedulers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publication6th Conference on Wireless Advanced (WiAD) 2010, London, UK
Place of publication6th Conference on Wireless Advanced (WiAD), 2010
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Publication dateJun 2010
Pages1 - 6
Number of pages6
ISBN (Print)9781424470693
DOIs
StatePublished

Conference

Conference6th Conference on Wireless Advanced
Abbreviated titleWiAD
CountryUnited Kingdom
CityLondon
Period1/06/10 → …

Abstract

WiMAX performance evaluation considering different scheduling techniques has received considerable attention by WiMAX researchers and also WiMAX operators. The standard does not define MAC scheduling although it affects the overall QoS performance of users as well as the achievable total cell goodput. The primary goal of this paper is to compare the performance of maximum total goodput including the average delay for UGS (Unsolicited Grant Service) users employing channel-aware and queue-aware downlink schedulers for a group of users. The paper initially considers the goodput behaviour and its peak across different modulation and coding schemes for SISO and MIMO (both Space Time Block Code (STBC) and Spatial Multiplexing (SM)) connections for a single user. The achievable maximum goodput is shown to be between 94.5% and 97.0% of the theoretical data rates. The analysis is then expanded to multiple users considering Proportional Fair (PF) with different observation window, tc, Greedy and also Weighted Fair Queuing (WFQ) schedulers to serve downlink QoS flows. The PF with a higher tc = 50K exceptionally outperforms WFQ as well as the PF with a smaller tc = 500 for a higher number of users and shows a greedy like performance. The channel-aware scheduler generally performs better than the queue-aware scheduler.

Additional information

Rose publication type: Conference contribution Sponsorship: The first author would like to thank Qualnet Support for their supportive forums and also to Zamri Napiah his comments. The first author is also grateful to the Ministry of Higher Education (MoHE) of Malaysia and Universiti Teknologi Malaysia for her funding. Terms of use: Copyright © 2010 IEEE. Reprinted from 6th Conference on Wireless Advanced (WiAD) 2010. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or 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 must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

Research areas

  • goodput, WFQ, WiMAX, propotional Fair, greedy

Event

6th Conference on Wireless Advanced

Abbreviated TitleWiAD
Duration1 Jun 2010 → …
CountryUnited Kingdom
CityLondon

Event: Conference

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