流媒体传输在mpls网络中的qos研究

上海交通大学硕士学位论文流媒体传输在MPLS网络中的QoS研究姓名：曹翔申请学位级别：硕士专业：信号与信息处理指导教师：周军20051201IMPLSQoSInternetInternetbest-effortQoSInternetQoSIPMPLSMPLSIILSPMPLSMPLSQoSMPLSMPLSQoSMPLSMPLSMPLSIIIREQUIREMENTOFTHESIS,SJTUABSTRACTRecentlytherapiddevelopmentsofInternetsupplyawidegrowingspaceforvariousmultimediaapplications.Withtheapplicationofthewide-bandnetworkandthedevelopingvideotechnology,fromVODtonetworkTV,fromvisualtelephonetointernetsecuritysystem,thestreamingmediatechnologyismoreandmorewidelyappliedinsomanyfieldssuchasamusement,education,news,etc.However,thestreamingmediaapplicationsmainlybaseonthevideo/audioflowswhichalwayshavelarge-scaledatastreamandhighrealtimedemand.Itbringsupahugechallengetoavailablenetworkresourceandahigherrequirementfornetworkvideotransmissiontechnology.Currentinternettransmissionserviceisasinglelevel(best-effort)servicewhichcan’tguaranteetheQoSofdatastream.ThatmakestheQoSofvideoflowininternetbecomeaverychallengeableissue.TraditionalIProutingarchitectureandrelativeprotocolsonlysupplythereachableserviceofthedatatransmission.Ithasnocapabilityoftheglobalresourcearrangementthatwillcausepartialcongestiononthenetworktoagreatextentandreducetheutilizingratioofthenetwork.IVThetrafficengineeringisaprocesstocontroltheserviceflowonthenetwork.Itsaimistooptimizetheresourcedistributionandnetworkperformance,andtoreducethecongestiononthenetwork.TheimplementationofMPLStechnologyhasagreatstrategicsignificanceforthetrafficengineering.Itnotonlyhasasimilarcharacterwiththeconnection-orientednetwork,butkeepstheefficiencyofthelower-layerandcurrentoperationofthedatanetwork.Thereforeitisusedtosupplytheconnection-orientedservice.MPLSintegratethelabelswitchinginthesecondlayerandtheroutingtechnologyonthenetworklayer.Thatreducesthespendingoftheroutingprocess.TheLERisresponsiblefortheestablishmentoftheLSP.Inanetworkarchitectureincludingvariousnetworktransmissiontechnologies,MPLSsupplytheconnection-orientedservicebytheLSPandsupplytheordinarydatagramservicebythenormaldatagramtransmissionmechanism.SoitisgenerallyconsideredthatMPLSisaneffectivetechnologytoimplementtrafficengineering.ThisthesismainlyresearchestheQoSofthestreamingmediatransmissionontheMPLSnetwork.ItdiscussesamethodwhichappliestheCR-LDPontheMPLSnetwork.InordertoimprovetheQoSofthestreamingmediaonthenetwork,itintegratethescalablelayercodingtechnologybasedontheterminalandbringsforwardanideathatistotransfermulti-levelvideobymulti-channelontheMPLSnetwork.VAccordingtothemodelofMPLSnode,itmaterializesthecomponentsofthemodelinnetworksimulationenvironment.ThenthethesisenhancestheapplicationoftheMPLSnodeinmulticastbymodifyingtheoriginalmodelandmakingitsupportthePIM-SMprotocol.Finally,themodelisanalyzedandverifiedbyseveralsimulatingexperiments.TheresultsindicatethattheexplicitroutingandmulticastontheMPLSnetworkhaveagoodapplicablevalueforstreamingmediatransmission.KEYWORDS:streamingmedia,MPLS,trafficengineering,explicitrouting,multicast20061172006117200611711.1InternetStreamingMedia/QoSQualityofServiceQoS1-13/QoSQoS/1.22.3.4.5.VCRVideoCassetteRecorderVODVCR/6.PDAInternetbest-effortQoSInternetQoSQoSInternetQoS1-1Figure1-1GeneralStructureforStreamingVideoSystem1.2QoSQoSIETFIntegratedServiceISDifferentiatedServicesDSActiveNetworkingANIPEpsilonIPCiscoIBMARISAggregateRoutebasedIPSwitchingToshibaCSRCellSwitchRouteMPLSMultiProtocolLabel3SwitchingQoSFECForwardErrorCodingLayerCodingBandwidthAdaptionRateControlErrorConcealmentMPLSQoSMPLSQoS1.3MPLSQoSMPLSMPLSQoSMPLSMPLSMPLSIPQoSQoSMPLSMPLSMPLSCR-LDPRSVP-TECR-LDPMPLSNSMPLSNSQoSMPLS4IPQoS2.1IPDWDMInternetIPIPIPIPIPv4Best-effortQoSIETFQoS/RSVPDiffServMPLSTCP/IPIPQoSQoS1QoSIPIP2IPIPIP52.2QoSQoSQoS1QoSIP2IntServDiffServ3QoSTE/QoS4LANQoSIPIntServDiffServ802.1Q802.1D2.3QoS2.3.1QoS,IETF19942-1RSVPResourceReservationProtocoladmissioncontrolroutinesclassifierpacketschedulerzRSVPInternetRSVPzzzRSVPRSVPPSVP2-1Figure2-1IntServModel6IntServRSVPIntServIPQoSflowIPQoSIPQoSQoSRSVPQoSIPRSVPIntServ1GuaranteedService2ControlledLoadServiceQoSBest-effort3Best-effortServiceInternetQoSRSVPIPICMPInternetControlMessageProtocolIGMPInternetGatewayMessageProtocolRSVPTSpecRSpecFilterSpecFlowDescriptorRSVPIPv4IPv6RSVPIPTCP/UDPQoSRSVPQoSRSVPPATHPATHPATHRSVPRSVPz7zz12IntServ1RSVPRSVP2RSVPPATHRSVP3RSVPIntServ1IntServRSVP23IntServ82.3.2IntServISPISPServiceLevelAgreement,SLAISPTrafficConditionAgreement,TCASLAISPTCAISPQoSDiffServIntServQoSDiffServDomainAggregateDiffServQoSRSVPInternetDiffServIPv4TOSIPv6TrafficclassDiffServIPIPPHB2-2Figure2-2DiffServModel9PHBPerHopBehaviorIntServDiffServ1Internet2PremiumServicesPSPS3AssuredServicesASASASIPQoSDSINinprofileOUToutprofileOutInInternetIPDSFieldDSPHBDSTCADSIPv4TOSTypeofServiceIPv6TrafficClassbit0-5DSCPbit6-7CUIETFECNExplicitCongestionNotificationCUPHBCUDiffServPHBPHBPHBPHBPHBDSDSIPDSPHBPHBQoSPHB10PHBPHBPHBPHBIETFPHBPHBBE-PHBPHBCS-PHBPHBEF-PHBPHBAF-PHB1PHBBE-PHBInternetDSCP000000PHBPHBPHBDSCPDSCPPHBDSCPPHB2PHBCS-PHBIPDiffServPHBIPTOS3bit8IPDSCPDiffServTOS6BITTOSDiffServIPDiffServIPxxx0000000001110008IP3PHBEF-PHBPHBDSPHBDiffServPHBDSCP10111104