Throughput Analysis of the Intermittent DCF for Opportunistic Spectrum Access

Adamis, AV; Maliatsos, K; Cambourakis, G; Constantinou, P

dc.contributor.author	Adamis, AV	en
dc.contributor.author	Maliatsos, K	en
dc.contributor.author	Cambourakis, G	en
dc.contributor.author	Constantinou, P	en
dc.date.accessioned	2014-03-01T11:46:22Z
dc.date.available	2014-03-01T11:46:22Z
dc.date.issued	2009	en
dc.identifier.issn	09296212	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/37855
dc.subject	DCF	en
dc.subject	Markov model	en
dc.subject	Opportunistic spectrum access	en
dc.title	Throughput Analysis of the Intermittent DCF for Opportunistic Spectrum Access	en
heal.type	other	en
heal.identifier.primary	10.1007/s11277-009-9817-x	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s11277-009-9817-x	en
heal.publicationDate	2009	en
heal.abstract	Recently, the opportunistic spectrum access (OSA) technologies have drawn a lot of the research community attention, because, by utilizing cognitive radio (CR) capabilities, they provide us with solutions to compensate for the spectrum underutilization. The MAC design is an important aspect of this on-going research. In this paper we study the performance of the distributed coordination function (DCF) in the OSA environment, which requires periodic intermissions to the MAC operation for spectrum scan procedures and opportunities identification. We present several modifications to the DCF that render it robust and operational in demanding environments of frequent spectrum scan procedures and low achievable transmission rates. We also present an analytical model for the throughput calculation of the resulted Intermittent DCF, which is based on the Bianchi's Markov model and extends it so as to include the intermittent nature of the OSA environment. The proposed model is validated through simulations. A new parameter, controllable by the CR terminals, is used to optimize the throughput performance in realistic OSA scenarios. Using the presented analytical model we evaluate the performance of the Intermittent DCF under the effect of certain design parameters. © 2009 Springer Science+Business Media, LLC.	en
heal.journalName	Wireless Personal Communications	en
dc.identifier.doi	10.1007/s11277-009-9817-x	en
dc.identifier.spage	1	en
dc.identifier.epage	29	en