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<mets:metsHdr CREATEDATE="2026-07-23T23:25:03"><mets:agent ROLE="OTHER" TYPE="OTHER" OTHERTYPE="SOFTWARE"><mets:name>vls/2603</mets:name></mets:agent><mets:agent ROLE="OTHER" TYPE="OTHER" OTHERTYPE="INSTANCE"><mets:name>nrwce</mets:name></mets:agent><mets:agent ROLE="OTHER" TYPE="OTHER" OTHERTYPE="REPOSITORY"><mets:name>ce.visuallibrary.net</mets:name></mets:agent><mets:agent ROLE="OTHER" TYPE="OTHER" OTHERTYPE="BUILDER"><mets:name>vd</mets:name></mets:agent></mets:metsHdr><mets:dmdSec ID="md373402"><mets:mdWrap MIMETYPE="text/xml" MDTYPE="MODS"><mets:xmlData><mods:mods version="3.8" xsi:schemaLocation="http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-8.xsd"><mods:titleInfo><mods:title>Optimizing software-defined networks using application-layer knowledge</mods:title></mods:titleInfo><mods:name type="personal"><mods:namePart>Wette, Philip</mods:namePart><mods:role><mods:roleTerm type="code" authority="marcrelator">aut</mods:roleTerm></mods:role></mods:name><mods:name type="personal" authority="gnd" authorityURI="http://d-nb.info/gnd/" valueURI="http://d-nb.info/gnd/120104423"><mods:namePart>Karl, Holger</mods:namePart><mods:role><mods:roleTerm type="code" authority="marcrelator">cns</mods:roleTerm><mods:roleTerm type="text">Gutachter</mods:roleTerm></mods:role></mods:name><mods:name type="personal"><mods:namePart>Stefano, Salsano</mods:namePart><mods:role><mods:roleTerm type="code" authority="marcrelator">cns</mods:roleTerm><mods:roleTerm type="text">Gutachter</mods:roleTerm></mods:role></mods:name><mods:typeOfResource>text</mods:typeOfResource><mods:genre authority="marcgt">book</mods:genre><mods:originInfo><mods:dateIssued encoding="w3cdtf" keyDate="yes">2015</mods:dateIssued><mods:issuance>monographic</mods:issuance></mods:originInfo><mods:language><mods:languageTerm authority="iso639-2b" type="code">eng</mods:languageTerm></mods:language><mods:physicalDescription><mods:extent>XIII, 151 S. : Ill., graph. Darst.</mods:extent></mods:physicalDescription><mods:abstract type="content" lang="ger">Software-Defined Networking (SDN) ist ein neues, wegweisendes Paradigma um Netze zu kontrollieren.Durch seine zentralisierte Kontrolle können Netze auf Zeitskalen von Millisekunden anstelle von Sekunden oder Minuten rekonfiguriert werden. Dies eröffnet vollkommen neue Möglichkeiten um Traffic Engineering zu betreiben.Diese Dissertation widmet sich der Frage: "Welchen Nutzen besitzt Anwendungswissen für Traffic Engineering um die Leistungsfähigkeit von Netzen zu erhöhen?".Um diese Frage zu beantworten, beschäftigt sich diese Arbeit mit leitungsvermittelnden, sowie mit paketvermittelnden Netzen.Beide Netztypen haben unterschiedliche Eigenschaften und bieten unterschiedlichste Möglichkeiten der Rekonfiguration. Aus diesem Grund werden beide Typen individuell, jeweils mit verschiedenen Methoden, untersucht.Bevor Kommunikation in einem leitungsvermittelnden Netz möglich ist, muss zunächst zwischen jedem Kommunikationspaar ein dedizierter Übertragungskanal vermittelt werden. Jeder Übertragungskanal wird exklusiv genutzt. Dies stellt gewisse Eigenschaften der Kommunikation sicher, wie eine feste Latenz oder eine gewisse Datenrate. Im Gegensatz dazu wird in paketvermittelnden Netzen ein gemeinsam genutztes Medium verwendet in dem keine Garantien bezüglich der Kommunikationseigenschaften existieren. Daten werden in (kleinen) Paketen übertragen die unabhängig voneinander durch das Netz geleitet werden.Als Beispiel für ein leitungsvermittelndes Netz dient in dieser Arbeit ein Weitverkehrsnetz (WAN). Als Beispiel für ein paketvermittelndes Netz wird ein Rechenzentrumsnetz genutzt. WANs decken sehr große Areale ab, wie beispielsweise ganze Länder. Es handelt sich dabei in der Regel um Glasfasernetze, die die Wavelength Division Multiplexing (WDM) Technologie verwenden...</mods:abstract><mods:abstract type="content" lang="eng">Software-Defined Networking (SDN) is a game-changing new paradigm in telecommunications.Using its centralized control, SDN is able to reconfigure networks on time-scales of milliseconds instead of seconds or minutes, opening up possibilities for traffic engineering undreamed-of before. This thesis studies the question "To which extent does application-layer knowledge help traffic engineering to increase network performance?". To this end, it considers the two network types circuit-switched networks and packet-switched networks. Both types have different properties and feature different possibilities for reconfiguration. This is why this thesis approaches both of them individually, in very different ways. Prior to communication in a circuit-switched network, a dedicated circuit between both communication partners has to be established. This circuit is used exclusively, ensuring certain properties such as usable data rate or latency. In contrast, in the packet-switched domain, a shared medium is used for communication. Data is transferred using (small) data packets which are routed independently of each other over the shared network. As a showcase for circuit-switched networks, this thesis considers optical wide area networks (WAN) and for packet-switched networks data-center (DC) networks are examined. WANs are covering large areas such as entire countries. They usually employ optical wavelength division multiplexing (WDM) technology providing high data rates to interconnect various smaller, diverse networks.DC networks, on the other hand, are deployed on a much smaller spatial area interconnecting servers owned by one operator. To include application-layer knowledge into the optimization of WDM networks, first a new type ofRouting and Wavelength Assignment (RWA) algorithm is proposed. The algorithm provides an interface between the management layer of a WDM network and the applications running on top of it...</mods:abstract><mods:note>Tag der Verteidigung: 07.07.2015</mods:note><mods:note type="thesis statement">Paderborn, Univ., Diss., 2015</mods:note><mods:classification authority="ddcger">000</mods:classification><mods:identifier type="eki">HBZHT018694879</mods:identifier><mods:identifier type="ncidn">HT018694879</mods:identifier><mods:relatedItem type="otherFormat"><mods:titleInfo><mods:title>Wette, Philip: Optimizing software-defined networks using application-layer knowledge</mods:title></mods:titleInfo><mods:recordInfo><mods:recordIdentifier source="ubpbce">CT004001331</mods:recordIdentifier></mods:recordInfo></mods:relatedItem><mods:location><mods:physicalLocation authority="local library code">466</mods:physicalLocation><mods:holdingSimple><mods:copyInformation><mods:subLocation>04</mods:subLocation><mods:shelfLocator>PQ934</mods:shelfLocator></mods:copyInformation></mods:holdingSimple></mods:location><mods:recordInfo><mods:recordOrigin>s2w-hsspadubpb</mods:recordOrigin><mods:recordCreationDate encoding="marc">20150710</mods:recordCreationDate><mods:recordIdentifier source="ubpbce">PQ934</mods:recordIdentifier></mods:recordInfo></mods:mods></mets:xmlData></mets:mdWrap></mets:dmdSec><mets:amdSec ID="amd373402"><mets:rightsMD ID="rights373402">
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