Effect of burst assembly over TCP performance in optical burst switching networks

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buir.advisorKaraşan, Ezhan
dc.contributor.authorGürel, Güray
dc.date.accessioned2016-07-01T11:05:53Z
dc.date.available2016-07-01T11:05:53Z
dc.date.issued2006
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.descriptionCataloged from PDF version of article.en_US
dc.description.abstractOptical Burst Switching (OBS) is proposed as a short-term feasible solution that is capable of efficiently utilizing the optical bandwidth of the future Internet backbone. Performance evaluation of TCP traffic in OBS networks has been under intensive study, as TCP constitutes the majority of Internet traffic. Since burst assembly mechanism is one of the fundamental factors that determine the performance of an OBS network, we focus our attention on burst assembly and specifically, we investigate the influence of the number of burstifiers on TCP performance for an OBS network. We start with a simple OBS network scenario where very large flows are considered and losses resulting from the congestion in the core OBS network are modeled using a burst independent Bernoulli loss model. Then, a background burst traffic is generated in order to create contention at a core node realizing burst-length dependent losses. Finally, simulations are repeated for Internet flows where flow sizes are modeled using a Bounded Pareto distribution. Simulation results show that for an OBS network employing timerbased assembly algorithm, TCP goodput increases as the number of burst assemblers is increased for each loss model. The improvement from one burstifier to moderate number of burst assemblers is significant, but the goodput difference between moderate number of buffers and per-flow aggregation is relatively small, implying that a cost-effective OBS edge switch implementation should use moderate number of assembly buffers per destination. The numerical studies are carried out using nOBS, which is an ns2 based OBS simulation tool, built within this thesis for studying the effects of burst assembly, scheduling and contention resolution algorithms in OBS networks.en_US
dc.description.degreeM.S.en_US
dc.description.statementofresponsibilityGürel, Gürayen_US
dc.format.extentxii, 61 leaves, illustrations, graphicsen_US
dc.identifier.itemidBILKUTUPB099694
dc.identifier.urihttp://hdl.handle.net/11693/29810
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectOptical Burst Switchingen_US
dc.subjectBurst Assemblyen_US
dc.subjectTCP Performanceen_US
dc.subject.lccTK5105.3 .G87 2006en_US
dc.subject.lcshPocket switching.en_US
dc.titleEffect of burst assembly over TCP performance in optical burst switching networksen_US
dc.typeThesisen_US

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Dept. of Electrical and Electronics Engineering - Master's degree