Performance Analysis of Contention Based Bandwidth Request Mechanisms in WiMAX Networks
2010 (English)In: IEEE Systems Journal, ISSN 1932-8184, Vol. 4, no 4, 477-486 p.Article in journal (Refereed) Published
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. © 2010 IEEE.
Place, publisher, year, edition, pages
Piscataway, N.J.: IEEE Press, 2010. Vol. 4, no 4, 477-486 p.
Telecommunications Communication Systems
IdentifiersURN: urn:nbn:se:hh:diva-20591DOI: 10.1109/JSYST.2010.2088770ISI: 000284540900009ScopusID: 2-s2.0-78649514861OAI: oai:DiVA.org:hh-20591DiVA: diva2:585214