onf183CarrierGradeSDNFramework18Word格式.docx
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onf183CarrierGradeSDNFramework18Word格式.docx
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OpenNetworkingFoundation
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www.opennetworking.org
©
2015OpenNetworkingFoundation.Allrightsreserved.
OpenNetworkingFoundation,theONFsymbol,andOpenFlowareregisteredtrademarksoftheOpenNetworkingFoundation,intheUnitedStatesand/orinothercountries.Allotherbrands,products,orservicenamesareormaybetrademarksorservicemarksof,andareusedtoidentify,productsorservicesoftheirrespectiveowners.
RevisionHistory
Revision
Date
RevisionEditor
Changes
1.0
12/7/15
ShaharSteiff
Firstrelease
Editors:
WeiqiangCheng,ChinaMobile
PaulDoolan,CoriantGmbH
DeanCheng-Huawei
ShaharSteiff–PCCWGlobal
TableofContents
1Scope9
1.1ScopeandObjectives9
1.2CommonTerms,AbbreviationsandDefinitions9
2Introduction10
2.1ConnectivityandResiliency10
2.2NetworkScaleandTechnologyDiversity10
2.3MaintenanceandOAM11
2.4DepreciationandRevenue11
2.5Services11
2.6Migration12
2.7NetworkProgrammability12
2.8IntegrationwithexistingOSS/BSS12
2.9Managementofsynchronization12
3Definitionandhigh-levelrequirementsforCarrier-gradeSDN12
3.1CarrierNetworkOverview12
3.2ProblemanalysisofcurrentCarrierNetworks13
3.3Carrier-GradeSDNhigh-levelrequirements14
4Carrier-gradeSDNarchitecture17
4.1TypesofopeninterfacesinSDNarchitecture17
4.2PlatformDomains,CarrierDomains,SingleandMultipleDomains18
5SDNBasedEndCustomerServiceRequests21
6Operationalaspects22
7NFVanditsrelationshipwithCarrierGradeSDN25
7.1NFVinCarrier'
sNetworks25
7.1.1MotivationofNFV25
7.1.2NFVOverview26
7.1.3NFVUseCase27
7.2RelationshipbetweenCarrierGradeSDNandNFVinCarrier'
sNetworks27
7.2.1RelationshipViewfromETSI28
7.2.2RelationshipViewfromONF28
7.3High-levelRequirementsoninteractionsbetweenCarrierGradeSDNandNFV29
8IntegrationofCarrier'
sNetworksandDataCenterNetworks30
8.1Servicerequirements30
8.2CarriernetworkbasedSDNarchitecture31
8.3MigrationConsiderations31
9ImpactofSDNtoCarrierNetworks31
9.1FromSDN-enabledData-CentretoCarrierNetworkProgrammability31
9.2Programmingresponsibility33
9.3DiscussionofCapEx/OpExandRevenueinSDN-enabledCarrierNetworks33
9.3.1LackofSuitabilityofwhile-labelgearasareplacementforCarrier-GradeCore/Aggregationgear33
9.3.2CostofGearvs.CostofTransport34
9.3.3Costofmigration34
9.3.4OpExconsiderations35
9.3.5NewRevenueopportunities35
9.4LimitationsofSDNinCarrierNetworks35
9.4.1Nomulti-domainorchestrationyetexists36
9.4.2servicespansacrossmultipleplatformsandmultiplecarriers36
9.4.3Scalechallenges36
9.4.4Distancechallenges36
9.4.5Inter-domainchallenges36
9.5TheStatelessController36
10References37
LISTOFCONTRIBUTORS37
ListofFigures
Figure4.1:
SingleNetworkOperator–SinglePlatform18
Figure4.2:
SingleNetworkOperator–MultiPlatform19
Figure4.3:
MultiOperator–MultiPlatform20
Figure4.4:
MEFLSOReferenceArchitecture21
Figure6.1:
CurrentCarrierNetworkOperations23
Figure6.2:
SDN-basedCarrierNetworkOperations24
Figure7.1:
VisionsofNetworkFunctionsVirtualization26
Figure7.2:
High-levelNFVFramework([10])27
Figure7.3:
NetworkFunctionsVirtualizationRelationshipwithSDN29
Figure8.1:
ServiceViews32
Figure9.1:
TypicalCarrier-GradeArchitecture36
Abstract
OperatorsareseekingthebenefitspromisedbySDNtodecreaseOpExandCapEx,whileatthesametimeenablingnewapplicationsandrevenuesvianetworkprogrammability.TheinitialONFfocusonSDNhasbeeninthecontextofdatacenters(DCs),wherethecost-benefit-timetradeoffswereimmediatelyattractive.WhilethereisbenefitinextendingSDNtotheTelcocarrierenvironment,thecarrierproblemdomainintroducesadditionalfactorstobeconsidered.Furthermore,evenwherethereareSDNconsiderationsandfactorscommontotheDCandTelcocarrier,someofthesemayhavesomewhatdifferentemphasis.
ThisdocumentprovidesaframeworkforthespecificationofSDNinCarriernetworks.Thisencompassesprovisionof:
∙HighlevelconsiderationsandrequirementsforSDNdeploymentinCarriernetworks;
∙Referencearchitectureandsupportinguse-cases/analysis
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