IP通信网流量工程关键技术研究

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1、密趣编号掌镪妻r镰j蓬毪鬻博士学位论文IP通信网流量工程关键技术研究学Ⅱm请^邹囤萍导"世$盛职称专业g“麇正琨教授通信与信息系统oot4十JI二十^H南京邮电大学博士学位论文ABSTRACTMulti-serviceIPcommunicationnetworkistheinevitableevolutiondirectionofNextGenerationNetworks(NON)，inwhichTrafficEngineeringfiE)technologyhasbeenpaidcloseattentionbytheindustry．Itfo

2、cusesonthenetworkplanninganddesigntoreachbalancednetworkload，thequalityofservice(QoS)ensuranceandhigllnetworkresourceutilization．nekeytechnologiesoftrafficengineeringinMPLS(MultiProtocolLabelSwitching)networksarethemainresearchtopicofthethesis．Followingtheperformanceanalysisa

3、ndcomparisionofexistingoptimizationmethodsforthenetworkbandwidthallocationinsingle—serviceMPLSnetworks，twomethodsformulti-servicesMPLSnetworksaleproposedusingbandwidthconstrantmodelandcoveringsuchmulti··servicesQoSrequirementsasend-to··enddelayandpacketlossprobability．Oneissu

4、itableforcentralizednetworkresourceallocationbasedonMPLSandDiffScrvmodelandtheotheriSfordistributednetworkresourceallocationbasedonDiffServ-awareMPLStechnology．ThenahosemodelisintroducedtothebandwidthallocationofVPNnetworks．ToovercometheshortcomingsofoptimalVPNtreebandwidthal

5、locationalgorithm,twonewbandwidthallocationmethodsareproposed．OnesimplyuseslinearprogrammingalgorithmtoallocatebandwidthofVPNnetworksandtheotherischaracterizedbyitsflexiblyselectableobjectivefunction．Finally,consideringthefactthattheexistingquasi-staticroutingmethodssufferfro

6、msuchlimitationsaslowcalladmissionrate，lowresourceutilizationrate，anddifficultytodynamicallybalancetheload，anewroutingmethodisproposed，whichintegratestheideasofbothstaticresourceconfigurationanddynamicrouteselection．Alltheaboveproposedmodelsandalgorithmshavebeenverifiedthroug

7、hdetailedsimulation．Thesimulationresultshaveshownthattheperformanceofproposedmodelsandalgorithmsaresuperiortothoseofexistingmethods，andtherequirementsofTEcanbefullymet．ItisbelievedthattheresearchresultswillbeusefulfortheplanninganddesignofIPcommunicationnetworks．Keywords：Mult

8、iProtocolLabelSwitching(MPLS)，traf矗cengineering,mqualityofservice(Qo