KIMSPROD RIPTION IPLOOKTechnologies www.iplook.com
IPLOOKTechnologiesCo,Limited Suite1101,OnHongCommercialB Kong OKIMSProductInform IPLOOKTechnologies/IPLOOKTechnologiesCo.,Limited Date(20220124)
IPLOOKTechnologiesCo,Limited Suite1101,OnHongCommercialB Kong Revisionhistory ModificationSummaryReviserRevi WilliamLi MultiPLMNsupport WilliamLi 1.3 DoneSu Li 12-07-20 1.4 DoneSu res Li 131220 15 DoneSu AS James16-05-21 16 DoneSupportforcallinglocal numbersstartingwith0 GavinJames281021
IPLOOKTechnologiesCo,Limited Suite1101,OnHongCommercialB Kong ...................................................................................... ...................................................................................... HighAvailability......................................................... ployment........................................................................ 1.2.4OpenInterfacesandFliblNtkAhitt 2 1.2.5SophisticatedOpe 2 126NFVPerformance 3 2Systemarchitecture 3 2.1IPLOOKIMSintheNF .............................................3 3Functionality......................... .............................................6 control uting agement nt iona ......... 316BusinessTrigger.. ..........................................17
IPLOOKTechnologiesCo,Limited Suite1101,OnHongCommercialB Kong 3.1.7Voicecalls............. ..........................................18 318SupportmultipleP 19 319BillingStrategy 20 taryOperations yControl urceControl Call............................................................................... orization...................................................................... 4OperationandMaintenance 34 5Reliabilitydesign.................. ..........................................35 51SoftwareReliability 35 6InterfacesandProtocols..... ...........................................37 7Dimension 38 8Roadmap 39 9AcronymsandAbbreviation 40
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page1of48 1Introduction 1.1IMSoverview IMS(IPMultimediaSubsyste ure,anewwaytodeliver o,data,etc)whichcanmeettherequirementsof especiallyVoLTEserviceIPLOOK’sIMSsystem ard,andusingOpenStackfordevelopmentThe oftheoperator'sLTEnetworkandcanalsocoop ltimediaservicefunctionunderthededicatednet asuserauthentication,sessioncontrolandroutin g.
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page2of48 1.2Highlightfeatures 1.2.1Virtualization Sftdhdared PLOOKIMSft b perateonuniversalhardwaredevicesoftheX86 ualplatform ghAvailability wareresourcesarevirtualizedtomanyVMsWh ocessingcapability,moreVMscanbeinstalled. ortsredundancyanddisasterrecoveryofcompo entireresourcepoolthroughdistributeddeployme systemreliability TheIPLOOKIMSsupportssmoothevolutionandsystemmigrationthroughonlinepatchesand applicationupdates 1.2.3Multi-NEDeployment IPLOOKprovidesALLINON EslikeMME,SGW,PGW, HSS,PCRF,IMS,DRAandw ngleserverItalsosupports GyorRadiusforexternalbilli CompactEPCspecification: 1UServer:2000UEs,20eN 2UServer:5000UEs,50eN 1.2.4OpenInterfacesandFlexibleNetworkArchitecture esaseriesofproductsandopenstandardinterfa ortsmultipletypesofVIM/CMScloudmanageme ndmultipletypesoforchestratorsItcanbeconfig perationandMaintenanceSystem rmsdailymaintenanceandmanagementthrough TheIPLOOKIMSfunctionsc ndintheupperlayerEMS Thefeaturesareasfollows:
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page3of48 TheO&Muse theC/Sstructure,ensuring adesirable ftheoperationand maintenanc Providesremo hatbothlocalandremote operationa Maintenanceoperationscan bforme ifiedNE elpermissionmechanismtoensuresystemsecur OOKIMShasthedynamicmanagement,prevent tion,tracingtool(includingsignalingtracingand management,andperformancemanagementfun ns,thesystemprovidesmultipleoperationandm ely,reliably,practicablyandconveniently.Inaddi addedasneeded Ssystemprovidesfriendlymanagementinterface enetworkingMultipleNEscanbemanagedina eOptimizationTechniques NetworkFunctionVirtualizati thewaytelecommunication infrastructuregetsdeployed esinthewaythat applicationsaredeliveredto efficiencies,timetomarket improvementsandinnovation rastructureandapplications. NFVwillachievethisthrough andtechnologyinvolvedin telecommunicationsapplicati Performance,especiallytheu asalwaysbeenaconcern forserviceprovidersandequ Caddresstheissueby applyingthefollowingperform serplanesoftware processingmodule. CombinetheSingleRootI/OVirtualization(SR-IOV)withIntel’sDataPlaneDevelopmentKit nhancetheperformance. VS)onenhancedIntel’sDPDK(ByIPLOOK)tofu e ecific10G,40Gor100GNICfromIntel,theperfo cture theNFVI IPLOOKIMSisdividedinto vel(cloudmanagement platformandvirtualizationtec
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page4of48 IPLOOKIMSisabletobeins gthescaleofthenetwork, IMScouldbeseparatedinto uldbedeployedinthesame instance,whileASandSCS nceOtherslikeICSCF, BGCFandMRFwillbetoget Foradescription S,refertoTable2. Tabl tions Node Comprehensiveserviceoperationandmanagement variousfunctionssuchasnetworkmanagement,sy dailymaintenanceandmanagementforMME Networkfunctionsvirtualizationinfrastructure,which resources TheNFVIisprovidedandmanagedbythecloudpla Hypervisor structureandapplications)inthe
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page5of48 Node NFVI Includescomputerhardware,storagehardware,and Arrangesandmanagesnetworkservices,virtualizat resourcesinthenetwork ManagestheIMSpartslifecycle VIM/CMS ManagementmoduleoftheNFVI,whichistheVIMintheETSINFVandthe infrastructure,managingand sourcesandvirtualization ,andprovidingvirtualresource dingvirtualresourcesrelatedto •TheVIM/CMSisacloudplatformmanagementfunctionprovidedbythecloud platformGeneralapplicationsincludeTECS,VmWa
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page6of48 3Functionality 3.1Basicfunction 3.1.1Callsessioncontrol systemprovidesmultimediaservicesbasedonth TF,togetherwithmultimediatransmissioncapabi mimplementssessioncontrolbasedontheSess FC3261. Basedon3GPP23.228protocolstandardIPmultimediasubsystemsessioncontrolisrealized byCallSessionControlFunc olesusedinIPmultimedia subsystemandcanbedivide CF,Serving-CSCF, Emergency-CSCFandother functions.CSCF,ServingCSCF,Emergency-CSCF,an 3.1.1.2Dependency AS √
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page7of48 3.1.1.3Principledesc 31131ProxyCSCF PCSCFistheaccesspointo agentdefinedbyIETFRFC requestsandinternallyservicesuseragentsorfo ytherequestURI,PCSCFinSIPmessagescan ases,itcanterminateandindependentlygenerate msthefollowingfunctions. gistrationrequestreceivedfromtheUEtotheent usingtheattributeddomainnameprovidedbytheUE. ForwardtheSIPmessag rver(e.g.SCSCF)inthe registrationresult. Wheninformationisavai CSCFcaninsertthetypeof accessnetworkcurrently requestorresponse.)ThePCSCFensuresthattheS erver(e.g.S-CSCF)contains thecorrectinformationa ntlyusedbytheUE. ForwardtheSIPrequestorresponsetotheUE sesurgentsessionestablishmentrequests alliancebetweenitselfandeachUE,asdefinedi ofbearerresources gCSCF heentitflltitthIMSnetwo destinedtoorlocatedwithin followingfunctions:
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page8of48 Registration: AssignSCSCFtous Sessionrelatedorsessionin sreceivedfromanothernetworktotheSCSCF addressincludedintherequestURItotheSIPUR Tel:URIformatasdefinedinIETFRFC3966be addressfromHSS questorresponsetotheSCSCFidentifiedinthe IftheICSCFdeterminesthatthedestinationofthesessionisnotwithintheIMSbasedon thequery,itmayforward rreturnafailureresponse, dependingontheoperat 3.1.1.3.3ServiceCSCF TheSCSCFperformssessio maintainsthesessionstateto supporttheserviceaccording Thefunctionsperformedby theS-CSCFduringasessionare: trarasdefinedinIETFRFC3261,i.e.itaccepts ormationthroughalocationserver(e.g.HSS). aboutregistrationchanges. onprocess,thepolicyinformationobtainedfrom UE Sessionrelatedorsessio
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page9of48 Sessioncontrolforregis Itcanactasaproxyserv acceptsrequestsand providesservicesinterna agent,ie,itcanterminateandgenerateSIPtra seofexceptions stsorresponsestotheAS,andhandletheintera platformbasedontheuser'sapplicationservicei hinformationrelatedtotheserviceevent,suchas stsorresponsestoICSCFswithintheIMSnetwo otherIMSdomains. ForwardSIPrequestsor alltothePSTNorCS domain. ForwardSIPrequestsor AttempttoconverttheE llyroutableSIPURI,ifthe conversionfails,therequ routingtothePSTN,ifthe conversionissuccessful GenerateaCDR g TheIPMultimediasubsystem sedonRFC3261.IMS networkentitieshavethesam anddifferentmessage
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page10of48 routingfunctionalitybasedon eachplayingtheroleofaSIP proxy cy AS √ 3.1.2.3Principleover AccordingtoRFC3261, thatrouteSIPrequeststo useragentserversandSIPr estarrivingattheIMScan traversemultipleSIPproxies utingdecisionsandmodify therequestbeforeforwarding bereturnedinreverseorder throughtheproxyroute. arrives,theSIPproxydetermineswhetheritnee aroutingdecision.Forexample,beforeactingas informationorbeunauthorized,andtheSIPprox andterminatestheproxyfortherequest. quest,theproxycanoperateinstatefulorstatele theagentactsasasimpleforwarderforwarding
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page11of48 nexthopaddressdetermined routeOncetherequestis forwarded,thestatelessprox atedwiththerequest Thestatefulproxykee equest,especiallythe anyrequestsitsendsarestoredastheresultofp canchoosetodistributerequests,routingthem multiplelocationsmusthavestatefulprocessing ntheRouteheaderfieldofthereceivedrequest fromtherequestNext,theagentcomputesthet estURIindicatesthatthisdomainisnotadomain responsiblefor,thentheRequest-URImustbeplacedinthetargetsetastheonlytargetURI whilecontinuingtoforwardth tprovideenoughinformation fortheproxytodeterminethe a485response.Theagent maymodifytheRequest-URI entisresponsibleforthis Request-URI. Foreachtarget,thea dtherequest: 1.Replicatethereceivedre 2UpdateRequest-URI wardsheaderfield headerfieldvalue(optional) elds(optional) tinginformation ess,portandtransportprotocolofthenexthop eldva 9AddaContentLengthhe
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page12of48 10Forwardingnewrequests 11SetTimer ment 3.1.3.1Definition IMSsecurityarchitecturedef gnalingandmediaintegrity andsecurityprotectionmech mechanismsdirectlytothe IPlayertoprovidesecurityse cation;IPsecprovidesESP protocolsforprovidingconfid ,providingreliability,integrity andconfidentialitysupportfo 3.1.3.2Dependency description ThefourcomponentsoftheI
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page13of48 Userterminalequipment dterminalequipment, includingthosewithIMS ieruserterminalequipment thatdoesnothavesuch uritysystem,tosupportSIPsignalingandCxinte unicationentities system,providingcommunicationsecuritybetwe pplicationserver ysystems,iemediasecurityfordifferentusesa ne Themainsecurityservicesprovidedbythesecuritysystemincludethefollowing: Authentication(entityau entityofthecommunicating entity Integrity:dataisexchang erifythatthedataandits characteristicshavenot Anti-Replay:Preventsbr pecialcaseofintegrity protection aisexchangedintheformofasecretcodetopre noptionalfeature ventunauthorizeduseofnetworkresources s: nitiatesregistration,theparametersoftheSecuri dbyS ntent carryoutthecorrespond ty-Serverheaderfieldwith
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page14of48 IPsecencryptioninforma sage,andtheIPsecchannel isestablishedatthesam Whentheterminalregist blishedthroughthe idedbyIPsec,thecontentofthesecondregistra nel,andthesessionestablishmentbetweenthet 3.1.4BusinessAgent 3.1.4.1Definition Theserviceagentisawayto ndportwhenimplementing SIPandRTPprocessingWi drealtimeprocessing serviceprocessingcapability RTPgatewaytoprovideIPv4 andIPv6sessionprocessing butedprocessingand collaboratewithIMSnetworkelementsforhighcapacityconcurrentprocessingandload cy PCSCF √
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page15of48 3.1.4.3Principledesc AfterthePCSCFreceive extractstherelevantIPand portcontentsnegotiates throughtheserviceagent primaryagentlayerprocessing,andreplacesthe sourceSIPmessage,andforwardsthemessage ndingbytheserviceagentbyrecordingtheIPan dingtothenegotiatedassignedport,andaccordin p Whentheserviceagenti ktitlkthtdSessionsessionrecordfor matchingandforwardsit aftercomparingthecontents oftheSessionsession,a ardingprocess. 3.1.5Userregistrationauth 3.1.5.1Definition RegistrationandauthenticationreferstotheregistrationrequestinitiatedbytheterminalUEto henticationandauthorizationofthesubscriberan sequentprovisionofvariousnetworkservicesofI stheuser'sinformation,itjudgesthelegitimacyo algorithmrequested.
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page16of48 3.1.5.2Dependency UEeNodeBMME P CSCF ICSCFS CSCF √√√√√ description saSIPregistrationrequesttotheIMSaccesssi extractstherelevantRealmanduser'sIMPIandotherinformationbasedontheSIP messagecontent,andth getotheHSStorequestthe appropriateSCSCFbas TheCSCFforwardsthe CF,thentheSCSCF extractstheinformationc ation"headerfieldintheSIP message,andtheSCSC S,whichcalculatesthe relevantvaluesandsend yhenticationcalculatesthe NONCEvaluewritestheNONCEvalueintotheSIPmessage,andreturnsittotheterminal ymessagealongtheoriginalroutinginformation atestheResponsevalueoncemorebasedonthe nitiatestheREGSITERrequesttoIMSagain.IM onseitcarries,andifthejudgmentisthesame,t tisfied,theregistrationissuccessful,and200OK ifnot,theNONCEvalue andsenttotheterminalto continuetocompletethe
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page17of48 3.1.6BusinessTrigger 3.1.6.1Definition erface,SCSCFsupportsthestandardizedServic legatesserviceexecutiontoanApplicationServe twork,whichcanbeeitheranetworkorjustasta cy P/I/S/ECSCFBGCFAS √ √ 3.1.6.3Principledesc IFC:InitialFilteringCriteria,t heuser'sServiceProfileand downloadedtotheSCSCFwhentheuserisregisteredorwhenanunregistereduseriscalled aterminalwiththeSCSCFiscomplete,theSC requesttotheapplicationserverortoforwardadd onserverbasedontheIFCinitialfilteringcriteria toresperapplicationserverinformationforthatu eIFCtoidentifytheserviceandtheSIPtransacti
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page18of48 executionontheapplication ationoftheapplicationserver isreceivedfromtheHSS ForincomingSIPrequests,th SCinteractionsbefore gprocessesWhenobtainingthenamesandaddr theHSS,theSCSCFshallcontacttheapplicati ndtheresponsefromthefirstapplicationserverw serverTheresultoftheresponsefromthefirstap FCfilteringprocess,continuingtheexecutionorte otprovideauthenticationandsecurityfeaturesfor 3.1.7Voicecalls 3.1.7.1Definition Voicecallisoneofthemost aservicerich,highqualitycall, morediversifiedetcvoicefu alitycallquality,while meetingtheinterconnectionw cy ESGWPGWPCRFHSSPC √√√√√
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page19of48 3.1.7.3Principledesc Whentheterminalmake serinformationbasedonthe SIPsignalingcontent,an allinguserbelongsunder ndifitmeets,itwillforwardfromthestoredinform ecordhasbeensaved FdomainisthenforwardedtotheIMSdomainon outingsituation domainwillextractthecalledinformationfromS ,andforwardthecorrespondingcontenttothecall g theverification,andcomltthilli thoughSIPsignaling interaction. AftertheSIPinteraction dandthevoicecallis completed. 3.1.8SupportmultiplePDN 3.1.8.1Videocall servicesofIMS,theterminalcarriestherelevant gandalsocarriestherelevantVIDEOinformation oprietarycommunicationbearertoprovidehighq ngsituation.
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page20of48 3.1.8.2Dependency UEeNodeBMMESG FICSCFSCSCFMMTELAS √√√√√ √ description sVIDEOrelatedparameterswheninitiatingSIPr dthprovidedbythecorenetwork SIPsignalingforvideovoicecallsinitiatedbytheterminalandtheIMSreceivestheSIP signalingandverifiesthe g TheIMSforwardsSIPsi hverifiesthecalledstatus andforwardsSIPmessa AftertheSIPsignalingin eforvideocallsbegins 3.1.9BillingStrategy 3191Definition toIMS'sbillingfunctionunderdifferentpoliciesfo videocalls,supportingmultiplebillingpoliciesan gtoconnecttoOCSnetworkelementsandofflin
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page21of48 3.1.9.2Dependency PCSCFSCSCFMM √ √√ description CSnetworkelementforonlinebillingthroughDiam rocessbyinitiatingCCRmessage,andAVPcarr parametersintheCCRmessagewhichishandedovertoOCSnetworkelementforuser billingoperationaccordin sage;atthesametime,it canmeetmultiplebilling IMSdockstoCCFnetwo ameterRfinterface,and notifiesCCFnetworkele atingACRmessagecarrying relevantAVPcontent,wh ymodes 3.1.10SupplementaryOperations ApplicationServerMMTEL-ASprovidesmultimed otherthanbasicmultimediatelephonyservices
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page22of48 3.1.10.2Dependency HSSMMTELAS description nyservicesincludesupplementaryservices,whic ndPSTN/ISDNsupplementaryservicesThebeh supplementaryservicesperceivedbyusersisconsistentwiththebehaviortheyperceivewhen usingequivalentsupplement network IMSsupportsthefollowingco Callingnumberidentifica Callingnumberidentifica Callednumberidentifica CalledNumberIdentificationRestrictionTIR including: allforwardtoCFU sbeforeauserisbusycalling orwardtoCFNR Lbeforetheuserisnotloggedintothecall. ecallforwardingCFNRc. CallWaitingCW CallholdHOLD
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page23of48 CallRestrictionCB Prompttone ontrol isanimportantpartofIMS,generallycontrolling thePSTNnetworkforsessionmanagement. 3.1.11.2Dependency ICSCFSCSCFBGC √ √ √ 3.1.11.3Principledes Theegressgatewaycontrolmainlyimplementsthecallroutingfunctionwhichisusedto connectedtothePSTN/CSdomainentrypoint,re ttheappropriatePSTNinterfacepointforthecal ycontrolisabletoreceiveSIPmessagesfromth thelocallyavailableIMSdomaindependingont ageprocessingofSIPmessagesintheIMSdom messagecontent
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page24of48 3.1.12MediaResourceCon 3.1.12.1Definition urceFunction unctionController(MRFC):controlsthemediastr unctionProcessor(MRFP):providesmultimediar enablefunctionssuchasbeepplaybackinIMS 3.1.12.2Dependency MRFCMRFSAS √ √ √ 3.1.12.3Principledescription ogyisasfollows
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page25of48 MRFisdividedintoMultimed C)andMultimediaResource FunctionProcessor(MRFP) asfollows: mingresourcesintheMRFP omtheASandSCSCFandcontrollingtheMRFP asfollows controlledbyMRFC ams
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page26of48 Thetonereleaseprocessfor
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IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page28of48 ShowshowASusesear ficationsandwhentosend themandrejectcommunicati ponsecode ncyCall n SCF):Acallsessioncontrolfeaturethathandles routingemergencycallrequeststothecorrectem PSAP. LocationRetrievalFunction( eretrievaloflocation informationfortheUE,includ iallocationinformationand updatedlocationinformation. PublicSafetyAnsweringPoin eemergencycallsfromthe public. 3.1.13.2Dependency LRFPSAP √ √
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page29of48 3.1.13.4Principledes 3.1.13.4.1Emergency erminal. IPCAN IMS gistration sourceRequest 5.PCSCFDiscove 6.IMSRegistratio 7.EstablishEmerg megency uest eanyongoingcommunication EstablishEmerg rgency ilityandresourcevalidation E C Fig alls Performthefollowingsteps: 1TheUErecognizestherequesttoestablishanemergencysession Edoesnothavesufficientresourcesorcapacity therongoingsessions,thentheUEshalltermina asethereservedbearerresources. erregistrationisrequiredbutnotcarriedout,theU -CAN.IftheUEhasalreadyperformedbearerre esnotneedtobeperformed.DependingontheIP maybeassignedtotheUEa
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page30of48 4Ifabearerresourceforthe needstobereservedinthe IPCAN,thentheUEshallre IPCANmaysupporttheUE indicationthattherequestis doesnotprovideanIP ep3,thentheIPCANshallassignanIPaddress t CSCFdiscoveryprocesswheretheUEdiscovers encysessioninthelocalnetworktheexactmeth heIPCAN ntcredentialstoauthenticatetotheIMSnetwork, emergencyregistrationbyprovidingtheIPaddressobtainedinstep3orstep4totheP-CSCF selectedinstep5.TheIPad ssociatedwithstep3orstep 4.theIMSregistrationreques n.WhentheUEperformsa non-emergencyregistration, URIusedbytheUEinthe emergencyregistrationreque RIforcallingbacktotheUE. S-CSCFsetsrecommended localregulationsorcarrier policiesThefollowupregistr gistration IftheUEdoesnothavesufficientcredentialstoauthenticatetotheIMSnetwork,itshallnot cyregistrationrequest,butimmediatelyestablish anIMSemergencysessionestablishmentusingt econtainingtheemergencyserviceindicationan cyregistration,theUEshallusethepublicuserid
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page31of48 3.13.4.2Non-terminal s SincetheUEcannotdetectt senttothePCSCF accordingtothenormalsess CFdetectsthecallasan eemergencycallflagandforwardstherequestt ncycallsessionestablishmentinIM Uponreceiptoftheinitialrequestforanemergencycall,thePCSCFdetectsthecallasan emergencycall,detectswhet sitsidentity,andifthe requestdoesnotprovideaT heTELURIassociatedwith theemergencyregistration,it inthesessionestablishment requestandaddstheemerge Uponreceiptoftheinitialreq Fshallperformthefollowing actions Ifthelocationinformationisnotincludedintheemergencyrequestorifadditionallocation theECSCFneedstoretrievethelocationinform ormation,theECSCFrequeststheLRFtoverify UElocationisrequiredbutthelocationisunknow
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page32of48 3.1.14Carrierauthorization 3.1.14.1Definition 29.214standard,PCSCFshallinitiateaservicer ainingthepayloadofSDP,andapplyforauthoriz eocommunicationafterjudgingtheconditionsin cy UE eNodeBMMESGWPGWPCRFHSSPCSCF √ √ √ √ √ 3.1.14.3Principledes AfterthePCSCFreceive rtheSIPmessagecarries preconditioninformationandwhetheritmeetstheauthorizationtoapplyforthe proprietarybearer erminesthattheproprietarybearercanbeestabli xtractedcontent,andaccordingtotheSDPconte wDescriptionAVPat assestheserviceagent,thechangedIPandpor minal'sownIPandportarefilledintotheIPfieldc message
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page33of48 ThePCSCFtransmitsth kelementsignedbythe correspondingterminala y AccordingtotheAAAme ,ifthereplyissuccessful, bearingauthorizationapplicationprocess;otherwi
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page34of48 4OperationandMain TheIPLOOKprovidesaperfe nandsupportstheunified EMStoimplementdailymain BasedontheClient/Servera ancesubsystemprovidesa tenancesubsystemandaWebUIperformancem man-machineinterfaces. tenancesubsystemsupportsthreemodesofope otheOAMserverthroughaWebbrowserforma OMCmaintenancecenterforcentralizedmanag nandmaintenance,accessingtotheinternalnet upserver,andremotemaintenancebasedontheWeb F e
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page35of48 5Reliabilitydesign 5.1SoftwareReliabili IPLOOKusesopen-sourced ,itisamemory-basedKeyValuedatabase,hasgreatpe /standbyredundancymode. Allstatefulcontextsofcoren ase.Otherservice processesarestatelesssuch tymanagementprocess, sessionmanagementprocessandsoon. essioncontrolprocessisdeployedasactive/stan edataflowduringtheserviceswappingprocedur eimmediatelyinchargeofdealingwithpackets redundancyenforcementsaredeployedfromthe etochecktheactiveOMprocessstatus,thisproc eryoth
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page36of48 51NetworkelementReliabil AtNElevel,IPLOOKprovidespoolingredundancysolutionfordifferentscenariorequirement. 3GPPstandardpoolingsyste FDNSprioritiessetisfor disasterredundancy. nismishotbackup,thatmeansactivenodeand synchronizinguserdata(con ouldbemanagedbyasingle
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page37of48 unifiedO&M,sowhentheac ediatelyhandlecurrent servicewithoutanyservicein 6InterfacesandProto aces,protocolsandfunctionsofIPLOOKIMSare Table4InterfacesanddescriptionIPLOOKIMS Description BetweenPCRFandPCSCFforQoScontro ENUMinterface B verforTelURItoSIP U Shinterface B serprofile m ISCinterface B Sinterfaces BetweenSBC/PCSCFandUE(viaEPC/PG BetweenCSCFandHSS BetweenCSCFandMGCFforPSTN-IMSin TowardsNetworkManagementSystem
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page38of48 Interface D Rointerface B rprepaidservice charging ls rceRequirement：CPUThread(T),Memory(GB) User <10K 10 50 500K1M1M2M IMSCore 8T, 16GB 20 32 T, B) 4*(40T, 128GB) 8*(40T, 128GB) SBC 8T,20T, 32GB 32T, 64GB 2*(32T, 64GB) 4*(32T, 64GB) 8*(32T,16*(32T, Usermeansmaximumusern resource. 200k-500k 500k-1M GB 12T,32GB 24T,64GB
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page39of48 2*(40T,64GB)means2sets acity EachNE/NFshouldhave100 IMSCoreincludesotherIMS deployment,1vCPU1CPUThreadSoresou ry(GB))isequalto(vCPU,Memory(GB)) scalculatedbysessionnumber,inprevioustable als<10ksessionrange p
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page40of48 9AcronymsandAbb Name SecondGeneration hethirdGenerationmobilecommunications ThirdGenerationPartnershipProject ThirdGenerationPartnershipProject2 AsynchronousTransferMode AuthenticationCenter AVP AttributeValuePair BOSS Busine BSC BaseS CAMEL Custom Logic CAP CAMEL CAPEX Capital CBC Conten CCG ContentbasedChargingGateway ChargeGateway CoreNetwork CommercialOffTheShelf CircuitService CallSessionControlFunction Equipm EMS Elemen
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page41of48 EPS Evolve EUTRAN Evolve FCAPS Fault,C ity FileTransferProtocol GatewayGPRSSupportNode GeneralPacketRadioService GlobalSystemforMobilecommunications HomeLocationRegister HomeSubscriberServer IMSSF IMSServiceSwitchFunction IMS IPMult IMSI Interna IOT InterO ITU Interna LAI Locatio MAP Mobile MME MobilityManagementEntity MultimediaMessageServices MobileStation MobileSwitchingCenter MSISDN MeanTimeBetweenFailures MeanT NAT Networ
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page42of48 NE Networ NFV Networ NM Networ NetworkResourceIdentifier OperationandMaintenanceCenter OnlineChargingSystem OperatingExpense PacketDataProtoco1 PublicLandMobileNetwork POS PacketOverSONET/SDH PS Packet QoS Quality RADIUS Remote RAN RadioA RANAP RadioA RNC RadioN RNS RadioNetworkSubsystem RemoteRadioUnit StreamControlTransmissionProtocol ServingGateway ServingGPRSSupportNode SignalingTransport ShortM SMSC ShortM
IPLOOKTechnologiesCo.,Limited Suite1101,OnHongCommercialB Kong Page43of48 SMTP Simple SS7 Signali TCP/IP Transm TulipElasticComputingSystem Universalmobiletelecommunicationsystem