Medium access delay evaluation for distributed queueing dual bus (DQDB) MAC protocol

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dc.contributor.authorPham, Don H.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:45:42Zen
dc.date.adate2009-09-12en
dc.date.available2014-03-14T21:45:42Zen
dc.date.issued1992en
dc.date.rdate2009-09-12en
dc.date.sdate2009-09-12en
dc.description.abstractDistributed Queuing Dual Bus (DQDB) is a media access control (MAC) technique, which is being considered by the IEEE 802.6 for the metropolitan area network (MAN). The DQDB medium access technique has many promising advantages over other access methods. However it has one drawback, which is its unfairness in terms of node-dependent medium access delay. In this paper a mathematic model is formulated to describe this detrimental behavior of DQDB. The access control method is first modeled as a M/G/1 queueing system with a single priority level, then it is remodeled as a non-preemptive priority system with three priority levels. By employing these models, the approximate medium access delay analysis of a DQDB network is investigated for a metropolitan area network containing 50 stations with a channel bandwidth of 150 Mbps. Numerical results are then presented to illustrate the network unfairness performance under various traffic intensities and under different priority levels. The results have been obtained for non-isochronous (asynchronous) traffic.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 93 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-09122009-040239en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09122009-040239/en
dc.identifier.urihttp://hdl.handle.net/10919/44732en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1992.P525.pdfen
dc.relation.isformatofOCLC# 26088389en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1992.P525en
dc.subject.lcshLocal area networks (Computer networks)en
dc.subject.lcshMetropolitan areasen
dc.subject.lcshQueuing theory -- Mathematical modelsen
dc.titleMedium access delay evaluation for distributed queueing dual bus (DQDB) MAC protocolen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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