5G核心网关键技术和功能介绍课件

5G核心网关键技术和功能介绍5G核心网关键技术和功能介绍12目录5G核心网架构和各主要NF功能描述5G核心网关键技术介绍基于服务的构架SBA控制面和用户面分离CUPS计算与存储分离网络切片构架和选择NSSF注册管理和连接管理RM/CM用户标识不同的注册管理流程和功能几种不同的连接管理状态分析会话管理SMPDU会话的一些特性介绍会话和业务连续性模式介绍基于流的QoS模型介绍边缘计算和本地路由功能5G的关键呼叫流程注册流程PDU会话建立流程切换流程2目录21.

5G核心网架构和各主要NF功能描述1.5G核心网架构和各主要NF功能描述35GServiceBasedArchitecture

(SBA)AUSFUE(R)ANUPFN2N3N1N9AMFN4AFPDNN6N4SMFUDMUSER

PLANELocal

PDNUPFN1N2UEAPN3IWFN3NEF3rd

partyappl.DSFPCF NRFCONTROL

PLANEAuthenti-ficationAccess&Mobility

MgmtUnified

datamgmt5GCore

(SBA)ServiceBased

ArchitectureApplicationSession

FunctionMgmtData

StorageFunctionUser

PlaneFunctionPolicy

CtrlFunctionNetworkrepositoryFunctionServicebasedinterfaces

(APIs)“on

demand”Network

ExposurefunctionAMF:AccessandMobilitymanagement

FunctionSMF:SessionManagement

FunctionUPF:UserPlane

FunctionUDSF:UnstructuredDataStorage

FunctionAUSF:AuthenticationServer

FunctionUDM:UnifiedDataManagementUDR:UnifiedData

RepositoryN3IWF:Non-3GPPInterworking

FunctionNRF:NetworkRepositoryFunctionNEF:NetworkExposureFunctionNSSF:NetworkSliceSelection

FunctionPCF:PolicyControl

Function45GServiceBasedArchitecture4AccessandMobilityManagementfunction

(AMF)Mandatory

functionalityTerminationofRANcontrolinterface

(N2)TerminationofNAS(N1),NAScipheringand

integrityprotectionAccessauthenticationand

authorizationSecurityanchorfunctionandsecuritycontextmgmt

foraccesssecuritykey

handlingRegistration,connection,reachability,andmobilitymanagementSessionmgmtmessagetransportandproxybetweenUE

andSessionManagementFunction

(SMF)SMStransportbetweenUEand

SMSFLawful

interceptionOptional

functionalitySupportofmandatoryfunctionalityfornon-3GPP

accessN3IWFN2interfaceterminationandNAS

signaling5GSystem

ArchitectureAMFSMFPCFAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSF

EIRNRF UDSFUDM UDR

NEFn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF5©Nokia

2018AccessandMobilityManagement5SessionManagementfunction

(SMF)Sessionestablishment,modifyandreleaseincN3

tunnelUEIPaddressallocation&

managementSelectionandcontrolofUPfunction

(UPF)UPFtrafficsteeringconfigurationtoproper

destinationTerminationofinterfacestowardsPolicycontrol

functionsControlpartofpolicyenforcementand

QoSChargingdatacollectionandsupportofcharging

interfacesControlandcoordinationofchargingdatacollectionat

UPFTerminationofSMpartsofNAS

messagesDownlinkData

NotificationInitiatorofANspecificSMinformationviaAMFover

N2DetermineSSCmodeofa

sessionLawful

interceptRoamingfunctionality(localQoS,charging,

LI)5GSystem

ArchitectureAMFSMFPCFAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSF

EIRNRF UDSFUDM UDR

NEFn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF6©Nokia

2018SessionManagementfunction(S6Userplanefunction

(UPF)AnchorpointforIntra-/Inter-RATmobility(when

applicable)ExternalPDUsessionpointofinterconnecttoData

NetworkPacketrouting&

forwardingPacketinspectionandUserplanepartofPolicy

ruleenforcementLawfulintercept(UP

collection)Trafficusage

reporting.Uplinkclassifiertosupportroutingtrafficflowstoa

datanetwork.Branchingpointtosupportmulti-homedPDU

session.QoShandlingforuserplane,e.g.packetfiltering,

gating,UL/DLrate

enforcementUplinkTrafficverification(SDFtoQoSflow

mapping).Transportlevelpacketmarkingintheuplinkand

downlink.Downlinkpacketbufferinganddownlinkdatanotificationtriggering.5GSystem

ArchitectureAMFSMFPCFAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSF

EIRNRF UDSFUDM UDR

NEFn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF7©Nokia

2018Userplanefunction(UPF)Ancho7NetworkRepositoryFunction

(NRF)Supportsservicediscovery

functionReceiveNFDiscoveryRequestfromNFinstance,andprovidestheinformationofthediscoveredNFinstances

(bediscovered)totheNF

instanceMaintainstheNFprofileofavailableNFinstancesand

theirsupportedservices(e.g.ID,Type,PLMN,Slice,FQDN,capabilities,authorizationinformation,service

names)Allnetworkfunctionsinteractwith

NRFMultipleNRFscanbedeployedinnetworkslicingperPLMN,pergroupofslices,orslice

specificInroamingcasesVPLMNandHPLMNmaybe

used5GSystem

ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDRNEFUDMn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF8©Nokia

2018NetworkRepositoryFunction(N8UnstructuredDataStorageFunction

(UDSF)Storageandretrievalofinformationasunstructureddata

byanyNF(e.g.context,state,

session)AllnetworkfunctionscaninteractwithUDSF(viaN18/Nudsfinterface)NFsmayshareaUDSFforstoringtheirrespectiveunstructureddataormayeachhavetheirown

UDSFDeploymentscanchoosetocollocateUDSFwith

UDRUnstructuredDataStorageFunction

(UDSF)ContextStateSessionAny

NFN18/Nudsf5GSystem

ArchitectureAMFSMFPCFAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDM UDR NEFn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFEIR

LMF9©Nokia

2018UnstructuredDataStorageFunc9UnifiedDataRepository

(UDR)StorageandretrievalofsubscriptiondatabytheUDM

FEStorageandretrievalofpolicydatabythe

PCF.Storageandretrievalofstructureddataforexposure,andapplicationdata(includingPacketFlowDescriptions(PFDs)forapplicationdetection,applicationrequestinformationformultipleUEs),bythe

NEFDeploymentscanchoosetocollocateUDSFwith

UDRUnifiedDataRepository

(UDR)SubscriptionPolicyExposureApplicationNEF

FENudrUDM

FE PCF

FE5GSystem

ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSFUDRNEFNRF UDSF UDMn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF10©Nokia

2018UnifiedDataRepository(UDR)U10UnifiedDataManagement

(UDM)3GPPAKAAuthenticationCredential

ProcessingUserIdentification

HandlingAccess

AuthorizationRegistration/Mobility

managementSubscription

managementSMS

managementUDMusessubscriptiondataandauthenticationdata

thatmaybestoredin

UDR5GSystem

ArchitectureAMFUPFSMFPCFEIRAUSFUEN1N2N3UPF4G/5GN4N9N4N3IWFNSSFN5N7N11N22SMSFN20NRFUDSFUDRNEFAFN15UDMN12

N8

N17n3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryIMSInternetN611©Nokia

2018UnifiedDataManagement(UDM)511NetworkExposureFunction

(NEF)Securelyexposetheservicesandcapabilitiesprovided

by3GPPnetworkfunctionsfore.g3rdparty,internalexposure/re-exposure,ApplicationFunctions,EdgeComputingProvidesameansfortheApplicationFunctionstosecurelyprovideinformationto3GPPnetwork,e.g.Mobility

Pattern,communication

patternAuthenticate,authorizeandthrottlethe

ApplicationFunctionsTranslationinformationbetweenAFandinternalnetworkfunctionReceivesinformationfromothernetworkfunctions(basedonexposedcapabilitiesofothernetwork

functions)MayimplementaFrontEnd(NEFFE)tostorethereceivedinformationasstructureddatausingastandardizedinterfacetoaUnifiedDataRepository(UDR).Thestoredinformationcanbeaccessedand"re-exposed"bytheNEF

toothernetworkfunctionsandApplicationFunctions,andusedforotherpurposessuchas

analytics.5GSystem

ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDRNEFUDMn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF12©Nokia

2018NetworkExposureFunction(NEF12NetworkSliceSelectionFunction

(NSSF)Selectingthesetofnetworksliceinstancesservingthe

UEDeterminingtheAllowed

NSSAIDeterminingtheAMFSettobeusedtoservetheUE,or,basedonconfiguration,alistofcandidateAMF(s),possibly

byqueryingthe

NRF.5GSystem

ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDRNEFUDMn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF13©Nokia

2018NetworkSliceSelectionFuncti13AuthenticationServerFunction

(AUSF)SupportsAuthenticationServerFunction(AUSF)as

specifiedbySA

WG35GSystem

ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDRNEFUDMn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF14©Nokia

2018AuthenticationServerFunction14PolicyControlFunction

(PCF)Supportsunifiedpolicyframeworktogovern

networkbehaviorProvidespolicyrulestoControlPlanefunction(s)to

enforcethemImplementsaFrontEnd(PCFFE)toaccesssubscriptioninformationrelevantforpolicydecisionsinaUnifiedDataRepository

(UDR)5GSystem

ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDRNEFUDMn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF15©Nokia

2018PolicyControlFunction(PCF)515Non-3GPPInterWorkingFunction

(N3IWF)UEIPSEC/IKEtunnel

terminationTerminationofN2andN3interfacesto5GCore

NetworkforControl-Planeanduser-planerespectivelyRelayinguplinkanddownlinkcontrol-planeNAS(N1)signalingbetweentheUEand

AMFHandlingofN2signalingfromSMF(relayedbyAMF)relatedtoPDUsessionsand

QoSEstablishmentofIPsecSecurityAssociation(IPsecSA)

tosupportPDUSession

trafficRelayinguplinkanddownlinkuser-planepacketsbetweentheUEandUPF.(De-capsulation/EncapsulationofpacketsforIPSecandN3

tunneling)EnforcingQoScorrespondingtoN3packetmarking,takingintoaccountQoSrequirementsassociatedtosuch

markingreceivedover

N2N3user-planepacketmarkinginthe

uplink.Localmobilityanchorwithinuntrustednon-3GPP

accessnetworksusing

MOBIKESupportingAMF

selection5GSystem

ArchitectureAMFSMFPCFEIRAUSFUEN1N2N3UPF4G/5GN4IMSN3IWFNSSFN5SMSFNRFUDSFUDRNEFUDMn3GPPAllnetworkfunctionscaninteractwithNRF,UDSF,

UDM,

UDR,

and

NEF

as

necessaryBGWHSSTASN6MRFLMF16©Nokia

2018Non-3GPPInterWorkingFunction162. 5G核心网关键技术介绍©Nokia

20182. 5G核心网关键技术介绍©Nokia201817基于服务的构架SBA©Nokia

2018基于服务的构架SBA©Nokia201818Technologybehind:Modularityand

SBA19©Nokia

2018Technologybehind:Modularity19Control

PlaneAnNFserviceisonetypeof

capabilityNFService

ProducerAuthorizedNFService

ConsumerNetworkFunctionmayexposeoneormoreNF

servicesthroughaservice-basedinterface,two

mechanisms"Request-response“"Subscribe-Notify"NetworkFunctionService

Framework20©Nokia

2018ControlPlaneNetworkFunction20SBArequiresserviceframeworkandidentificationof

services21©Nokia

2018FrameworkConceptDiscoveryNF

discovery,

NF

service

discovery

enables

a

CP

NF

to

discover

a

NF

instance(s)that

provides

theexpected

NF

service(s).

It

is

implemented

either

via

configuration

or

optionally

by

using

the

NRFThe

requester

NF

performs

the

selection

if

the

NRF

returns

more

than

one

optionsThe

requester

NF

might

cache

the

results

of

the

discovery

request

for

subsequent

useMultipleNRFscanbedeployedatdifferent

levels:PLMNlevel(theNRFisconfiguredwithinformationforthewhole

PLMN)shared-slice

level

(the

NRF

is

configured

with

information

relevant

for

the

common

NFs

of

a

setofNetwork

Slices)slice-specificlevel(theNRFisconfiguredwithinformationbelongingtoan

S-NSSAI)AuthorizationEntailsTwo

steps:Check

whether

the

requester

NF

is

permitted

to

discover

the

requested

NF

instance

during

the

NFservicediscoveryprocedure

NFlevel

granularityCheckwhethertherequesterNFispermittedtoaccesstherequestedNFforconsumingtheNFservice.This

is

either

per

NF

or

per

UE/roaming

agreement

granularity.

NF

Service

authorization

perUE

granularity

is

embedded

inthe

related

NF

service

logicRegistration

andDe-registrationRegistration/De-registrationofNFprofileandNFserviceswithNetworkrepositoryfunction

viadirectinteractionbetweenNF–NRFor

OAMSBArequiresserviceframework21Uniformsolutionforall5GService-Based

InterfacesSBAprotocol:

HTTP/2Transport:

TCPSerializationprotocol:

JSONTheOpenAPI3.0.0isadoptedastheInterfaceDefinition

LanguageAPIdesignstyle:RESTfulAPIswheneverpossible,complementedbycustommethodsforserviceoperationsthatcannotbedesignedas

CRUDoperations22©Nokia

2018SBAprotocol

solutionUniformsolutionforall5GSe22©Nokia

2018控制面和用户面分离CUPS©Nokia2018控制面和用户面分离CUPS23Technologybehind:CPUP

SeparationCentralizedCPand

BUSstructureDistributed

UPUPFselectionand

re-selectionClosetoUE

(Edge)ULCLBranching-point24©Nokia

2018Technologybehind:CPUPSeparselectivetraffic

routing25©Nokia

2018selectivetrafficrouting25©NIPv4,IPv6&Ethernet

PDU’sTransparentto

UEexistmorethanone

UPFbutoneULCLisconnectedto

RANClassificationrulesprovidedinruntimeby

SMFClassifiesbasedontargetcharacteristicsofthe

flowsUplink

Classifier(UL-CL)26©Nokia

2018IPv4,IPv6&EthernetPDU’sUplmultiPDUSession

AnchorwithmultipleIPv6

prefixes.branchoutata"Branching

Point"UPFforwardingULtraffictowards

differentPDUSessionAnchorsandmergeDLtrafficto

UETheuseofmultipleIPv6prefixes

:aBranching

Point spread

UL

traffic

basedonSource

Prefixtosupportmake-before-break

servicecontinuity–SSCmode

3tosupportUEaccessbothlocalserviceandcentral

serviceUsageofIPv6multi-homingPDU

Session27©Nokia

2018multiPDUSessionAnchorwith©Nokia

2018计算与存储分离©Nokia2018计算与存储分离285GDataStorage

architecturesAllowsanycontrolplaneNFtostore

andretrieveitsunstructureddata(sessionstate)into/fromaUDSF(UnstructuredDataStorageNetwork

Function)UDSFbelongstothesamePLMNwhere

theNFis

locatedCPNFsmayshareaUDSF

ormayeachhaveitsown

UDSF5Gphase1specifiesAMFproceduresif

UEcontextisstoredin

UDSFN18/Nudsf:Protocolwillnotbespecified

inRel.

15UnstructuredData

StorageFunction

(UDSF)UnifiedDataRepository

(UDR)AllowstheUDM,PCF,NEFtostoredataintheUDR(UnifiedData

Repository)UDRcanbedeployedineachPLMN.TherecanbemultipleUDRsdeployedinanetworkeachaccommodatingdifferentdatasets/subsets.DeploymentswhereaUDRservesasingleNFandstoresitsdataandthuscanbeintegratedwiththis

NF,canbepossible,e.g.aUDMwithbuild-in

UDRDataexposedviaNudr(subscription,policy,structureddataforexposure,applicationrequestinformationformultipleUEs)shallbestandardized.Inadditionitshallbepossibletoaccessoperatorspecificdatasets/datanotstandardized.TheorganizationofthedatastoredinUDRshallnotbe

standardizedNudr:servicebasedinterfacehttp2based.Nudrisalwaysintra-PLMN,Nudmisinter-PLMNin

roamingN18/NudsfAny

NFUDSFSubscription

DataPolicy

DataStructuredDatafor

exposureApplication

DataUDRUDM

FEPCF

FENEF

FENudr29©Nokia

20185GDataStoragearchitecturesA29Technologybehind:Compute–Storage

Separationstateless

NFV30©Nokia

2018Technologybehind:Compute–S30©Nokia

2018网络切片构架和选择NSSF©Nokia2018网络切片构架和选择NSSF31NetworkSlice

IdentificationSSAIidentifiesaNetwork

Slice,comprised

of:ASlice/Servicetype(SST),referstotheexpectedNetworkSlicebehaviourintermsoffeaturesand

services;ASliceDifferentiator(SD),optionaltodifferentiatemultipleNetworkSlicesofthesameSlice/Service

type.canhavestandardvaluesornon-standardvaluesTheNSSAIisacollectionof

S-NSSAIs.aNetworkSliceinstancecanbeassociatedwithoneormoreS-NSSAIs,andanS-NSSAIcanbeassociatedwithoneormoreNetworkSlice

instances.32©Nokia

2018NetworkSliceIdentificationSSSliceExamplesin5GC&5G

RANeMBBUPFSMFUPFSMFeMBB

CONTROL

PLANE

USER

PLANEAMFUPFSMFeMTCSHAREDDEDICATEDSLICE

#1SLICE

#2SLICE

#3AMFRRC/PDCPN2MACPHYSDAPPDCPSDAPPDCPRRC/PDCPN2SDAPUE

1UE

25G

(R)ANN1(SST#1,

SD#A)N1(SST#1,SD#B;SST#2,

SD#B)N2N2N3N3N3SHAREDDEDICATEDPDCPS-NSSAI#1S-NSSAI#2UE1

NSSAISST#1SD#BSST#2SD#BSST#1S-NSSAI#1UE2

NSSAISD#ASST#1:eMBBService

SliceSST#2:eMTCService

SliceSD#A:Enterprise

ASD#B:Enterprise

BEnterprise

AEnterprise

BEnterprise

BRRC(SST#1,

SD#A)RRC

(

SST#1,

SD#B;

SST#2,

SD#B)RANSlice

SelectionFunction33©Nokia

2018SliceExamplesin5GC&5GRAN5GNetworkArchitectureforNetwork

SlicingSliceSpecificNetwork

FunctionsN3DNN2N1N5N7/N10/N11N4NG-SMFN6(*)Couldbeleftuptooperator

decisionNEFSliceCommonNetwork

FunctionsUDMAMFAUSF

PCF(*)(*)(*)NSSFUENG-RANShared

resources34©Nokia

2018Dedicated

resourcesSlicingprivacynotincludedinRel.

155GNetworkArchitectureforNeIndependentCPand

UPPartially-shared

CPFully-shared

CP35©Nokia

2018DifferentNetworkSliceDeployment

schemeIndependentCPandUP35©Nokiacomprisestwo

steps:performingaRMproceduretoselectanAMFthatsupportstherequiredNetwork

Slices.establishingoneormorePDUSessiontotherequiredDatanetworkviatheNetworkSlice

Instance(s).36©Nokia

2018NetworkSlices

Selectioncomprisestwosteps:36©NokiaUE

RegistrationConfiguredNSSAIprovisionedtoUEandNSSelectionPolicy(NSSP):RulesassociatinganAppwithanS-NSSAIandDNNlinkedtothe

AppUEsendsReg.Req.includingRequestedNSSAI.RANselectsAMFbasedonRequestedNSSAI(assumption5G-GUTIisnot

provided)AMFfetchessubscriptiondatafromUDM.UDMreturns(Subdata+Subscribed

NSSAI)AMFinterrogatesNSSFforSliceSelectionifitcannotservetheUE:NSSFreturnssetofNSIID,AllowedS-NSSAI,targetAMFset.AtargetAMFisselectedbytheAMFinitiallyreceivedtherequestandreroutingtothetargetAMF

appliesAMFsendsRegistrationAccept/Complete(AllowedS-NSSAIs,5G-GUTI,Registrationarea.Mobilityrestrictions,…)tobothRANandUE

(NAS)SubsequentlyUEusesupdatedNSSAIprovidinglistofAllowed

S-NSSAIs37©Nokia

2018UERegistrationConfiguredNSSA3. 注册管理和连接管理RM/CM©Nokia

20183. 注册管理和连接管理RM/CM©Nokia201838用户标识©Nokia

2018用户标识©Nokia2018395GSubscriptionPermanentIdentifier

(SUPI)ForinterworkingwithEPC,SUPIshallbeIMSI

basedSUCI:theconcealed

SUPI.PermanentEquipmentIdentifier

(PEI)PEIcanbedifferentformatsfordifferentUEtypesanduse

hisrelease,theonlyformatis

IMEItemporaryidentifier

(5G-GUTI)AMF

allocatescommontoboth3GPPandnon-3GPP

access<5G-GUTI>:=<GUAMI>

<5G-TMSI><GUAMI>:=<MCC><MNC><AMFRegionID><AMFSetID><AMF

Pointer><5G-S-TMSI>:=<AMFSetID><AMFPointer>

<5G-TMSI>Load

balancing

by

5G-AN

node

isonly

performed

between

AMFs

of

same

AMF

set40©Nokia

2018subscriberIdentifiers

1/25GSubscriptionPermanentIdenGenericPublicSubscriptionIdentifier

(GPSI)foraddressinga3GPPsubscriptionindifferentdatanetworksoutsideofthe3GPPsystem.GPSIsarepublicidentifiersusedbothinsideandoutsideofthe3GPP

systemeitheranMSISDNoranExternal

IdentifierSUCISUPIshouldnotbetransferredincleartextover5GRANexceptrouting

information,e.g.MobileCountryCode(MCC)andMobileNetworkCode

(MNC).- homenetworkpublickeyshallbestoredinthe

USIM.41©Nokia

2018subscriberIdentifiers

2/2GenericPublicSubscriptionIdperaccesstypei.e.,3GPPaccessorNon-3GPP

accessover3GPPaccess,AMFallocatesasetoftrackingareasinTAIListto

UE.takeintoaccount(e.g.MobilityPatternandAllowed/Non-AllowedArea

)mayallocatethewholePLMN("allPLMN")asregistrationareatoaUEinMICO

mode42©Nokia

2018Registration

Areaperaccesstypei.e.,3GPPaccequivalenttoan

APNDNNmaybeusede.g.

to:SelectaSMFandUPF(s)foraPDU

Session.SelectN6interface(s)foraPDU

Session.DeterminepoliciestoapplytothisPDU

Session.43©Nokia

2018DataNetworkName

(DNN)equivalenttoanAPN43©NokiaItprovideaPDUConnectivityServicebetweenaUEandadata

networkidentifiedbya

DNN.PDUSessionsIDassignedby

UE.ThedefinedPDUSessiontypes:IPv4,IPv6,IPv4v6,

Ethernet,Unstructured.44©Nokia

2018PDU

SessionItprovideaPDUConnectivity©Nokia

2018不同的注册管理流程和功能©Nokia2018不同的注册管理流程和功能45toregister/deregisteraUE/userwith

networkestablishusercontextinnetwork.InitialRegistration

procedure:PeriodicRegistration

UpdateMobilityRegistration

Updatetoupdateitscapabilitiesorre-negotiateprotocol

parameters46©Nokia

2018Registration

Managementtoregister/deregisteraUE/us5GSRegistrationManagementState

models47©Nokia

20185GSRegistrationManagementStUDMmanagesseparateUERegistrationproceduresforeach

accessForaservingPLMN,multipleaccess-specificRMcontextsforan

UE:a5G-GUTI(commonto3GPP/Non-3GPP

accesses)aRegistrationstateperaccess

typeaRegistrationAreaperaccess

typetimersfor3GPP

accessPeriodicRegistrationtimer;

andaMobileReachabletimerandanImplicitDeregistration

timer.timersfornon-3GPP

access5G-GUTIenablestheANtoselectan

AMF48©Nokia

2018RMcontextsin

AMFUDMmanagesseparateUERegist©Nokia

2018几种不同的连接管理状态分析©Nokia2018几种不同的连接管理状态分析49establishingandreleasingaNASsignallingconnectionbetweenaUE

andAMFItcomprisesboththeANsignallingconnection(e.g.RRCConnection

over3GPPaccess)andtheN2

connectionTwoCMstatesforNASsignallingConnectionoftheUEin

AMF:CM-IDLECM-CONNECTEDAnewRRC-INACTIVEstatusis

added50©Nokia

2018Connection

ManagementestablishingandreleasingaNRegistrationandConnectionManagementstate

machineCharacteristicsofthenewRRCInactivestate

:Configurablebasedontheservice

requestedUEreachabilityismanagedbyRAN,withassistanceinfofrom

CNPagingiscontrolledbyRAN,CNbehavesasin

CM-CONNECTEDTheUEwillmonitorpagingfromRANandCN(forlossofcoverageinRAN

PA)5.Ifresumefails,therecoverytakesplacevia

RRC-IDLE/CM-IDLE6.U-planeandC-planeconnectionsbetweenRANandcorearekept

establishedEfficient(fromsignalingoverheadpointofview)RRCConnectedInactivetoRRCConnected

statetransitionUEbasedmobilitywithUEmeasurementsandcellreselectionprocedurewithconfiguration

fromnetworkRANstores

theUEcontextduringtheRRCInactivestateRRC

CONNECTEDRRC

INACTIVERM

DEREGISTEREDRRC

IDLE(1)RM

REGISTEREDCM

CONNECTED(3)

(4)(5)RM

REGISTEREDCM-IDLERRC

IDLE(2)51©Nokia

2018RegistrationandConnectionMa4. 会话管理SM©Nokia

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