Ni, Qiang and Hu, Ling and Vinel, Alexey and Xiao, Yang and Hadjinicolaou, Marios (2010) Performance Analysis of Contention Based Bandwidth Request Mechanisms in WiMAX Networks. IEEE Systems Journal, 4 (4). pp. 477-486. ISSN 1932-8184Full text not available from this repository.
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.
|Journal or Publication Title:||IEEE Systems Journal|
|Uncontrolled Keywords:||Bandwidth request (BW-REQ) ; IEEE 802.16 ; Markov chain ; WiMAX ; broadband wireless access (BWA) ; medium access control (MAC) ; performance analysis ; quality-of-service (QoS)|
|Subjects:||Q Science > QA Mathematics > QA75 Electronic computers. Computer science|
|Departments:||Faculty of Science and Technology > School of Computing & Communications|
|Deposited On:||10 Oct 2012 16:41|
|Last Modified:||07 Jan 2015 17:58|
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