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Title: | Performance analysis of contention based bandwidth request mechanisms in WiMAX networks |
Authors: | Ni, Q Hu, L Vinel, A Xiao, Y Hadjinicolaou, M |
Keywords: | Bandwidth request (BW-REQ);Broadband wireless access (BWA);IEEE 802.16;Markov chain;Medium access control (MAC);Performance analysis;Quality-of-service (QoS);WiMAX |
Issue Date: | 2010 |
Publisher: | IEEE |
Citation: | IEEE Systems Journal, 4(4), 477 - 486, Dec 2010 |
Abstract: | WiMAX networks have received wide attention as they support high data rate access and amazing ubiquitous connectivity with great quality-of-service (QoS) capabilities. In order to support QoS, bandwidth request (BW-REQ) mechanisms are suggested in the WiMAX standard for resource reservation, in which subscriber stations send BW-REQs to a base station which can grant or reject the requests according to the available radio resources. In this paper we propose a new analytical model for the performance analysis of various contention based bandwidth request mechanisms, including grouping and no-grouping schemes, as suggested in the WiMAX standard. Our analytical model covers both unsaturated and saturated traffic load conditions in both error-free and error-prone wireless channels. The accuracy of this model is verified by various simulation results. Our results show that the grouping mechanism outperforms the no-grouping mechanism when the system load is high, but it is not preferable when the system load is light. The channel noise degrades the performance of both throughput and delay. |
Description: | This article is posted here with the permission of IEEE. The official version can be obtained from the DOI below - Copyright @ 2010 IEEE |
URI: | http://bura.brunel.ac.uk/handle/2438/5621 |
DOI: | http://dx.doi.org/10.1109/JSYST.2010.2088770 |
ISSN: | 19379234 |
Appears in Collections: | Electronic and Computer Engineering Publications Dept of Electronic and Electrical Engineering Research Papers |
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