A new adaptive burst assembly algorithm for OBS networks considering capacity of control plane

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buir.advisorKaraşan, Ezhan
dc.contributor.authorÇırak, İsmail
dc.date.accessioned2016-01-08T18:07:58Z
dc.date.available2016-01-08T18:07:58Z
dc.date.issued2008
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and the Institute of Engineering and Sciences of Bilkent University, 2008.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2008.en_US
dc.descriptionIncludes bibliographical references leaves 55-57.en_US
dc.description.abstractRecent developments in wavelength-division multiplexing (WDM) technology increase the amount of bandwidth available in fiber links by many orders of magnitude. However, this increase in link capacities is limited by the conventional electronic router’s capability. Optical burst switching (OBS) has been proposed as a promising and a short-term solution for switching technology to take advantage of increased capacity of optical links. The congestion in OBS control plane and the adaptive burst assembly algorithms are two important research topics that are among the most effective factors determining the performance of OBS networks. These two problems have been separately studied in the literature so far. It has been shown that contending bursts at a core optical switch in an OBS network may experience unfair loss rates based on their residual off- set times and burst lengths, that are called path length priority effect (PLPE) and burst length priority effect (BLPE), respectively. In this thesis, we propose a new adaptive timer-based burst assembly algorithm (ATBA) which uses loss rate measurements for determining the burstification delays of traffic streams in order to mitigate the undesired effects of PLPE and BLPE. ATBA distributes the burst generation rates of traffic streams at an ingress node such that total rate of generated bursts is constant in order to constrain the congestion in the control plane. Without ATBA, the fairness index drops to 76% when per hop processing delay (PHPD) is increasing. With ATBA, the fairness index drops only to 85% with increasing PHPD. It is also shown that the total goodput of the OBS network improves by 5% compared with the case without ATBA.en_US
dc.description.degreeM.S.en_US
dc.description.provenanceMade available in DSpace on 2016-01-08T18:07:58Z (GMT). No. of bitstreams: 1 0003648.pdf: 698150 bytes, checksum: 166ef3e8f427adbb11402e08fb50a3ef (MD5)en
dc.description.statementofresponsibilityÇırak, İsmailen_US
dc.format.extentxii, 57 leaves, illustrations, graphicsen_US
dc.identifier.urihttp://hdl.handle.net/11693/14782
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectOptical Burst Switching (OBS)en_US
dc.subjectBurst Length Priority Effect (BLPE)en_US
dc.subjectPath Length Priority Effect (PLPE)en_US
dc.subjectCongestion in OBS Control Planeen_US
dc.subjectAdaptive Burst Assemblyen_US
dc.subject.lccTK5105.3 .C57 2008en_US
dc.subject.lcshPacket switching (Data transmission)en_US
dc.titleA new adaptive burst assembly algorithm for OBS networks considering capacity of control planeen_US
dc.typeThesisen_US

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