LTE Poster
2
LTE Evolved Packet System Architecture LTE enables y ou to redefine the end-user experience with the most advanced packet-based solution in the industry. Continuing our 3G partnership into LTE, the Alcatel-Lucent end-to-end LTE solution provides: • A comprehensive transformation to an IP infrastructure with minimal risk • An open LTE ecosystem of devices, applications and content providers • Smooth interworking with existing 2G/3G networks and evolution to the next generation For more information, visit: www.alcatel-lucent.com/LTEinfo or call y our Alcatel-Lucent re presentative. IMSarchitectureis describedin TS23.228 IMSsupports VoIPon EV-DO ,HSPA+and LTE SingleRadio VoiceCall Continuity (SRVCC) IMSsupports optimized handoff of calls between V oIPdomains andwireless circuitdomains usingtheVoice CallContinuity (VCC) a pplication server(TS23.216) IMScentralizedservices (ICS) (TS23.292) andservice centralization an d continuity (SCC) (TS23.237) enableIMSservices foruser equipmentin thecircuit-switcheddomain Circuit-switched (CS) fall back IMS - Industry-standard service architecture Mobility Management Entity (MME) functions Non-Access Stratum(NAS) signaling(attachment,bearersetup/deletion) NASsignalingsecurity Signalingformobility between 3GPPaccess networks (S3) Idlemodeuser equipmentreachability TrackingArea listmanagement PDN gateway andservinggateway selection MME selection forhandoffs with MME change Roaming-s6a to homesubscriberserver (HSS) Authentication Bearermanagementfunctions includingdedicatedbearerestablishment SupportforEarthquakeandTsunamiWarningSystem (ETWS) messa getransmission Alcatel-Lucent9471 MME User Equipment (UE) functions Contains theUniversalSubscriberIdentity Module(USIM) which holds authentication information Supports services andapplications Monitors radios andconveys performanceto theEvolved NodeB (eNB) channel quality indicator(CQI) Supports LTE up linkanddownlink airinterface Maps upstreamtrafficinto trafficclasses thataredefinedby upstreamtraffic flow templates Home Subscriber Server (HSS) Storageof subscriberdata Enhan cedPresence Service(EPS) QoSsubscriberprofile Roamingrestrictions list AccessibleAccess PointNames (APNs) Address of currentserving mobility managemententity (MME) CurrentTrackingArea (TA) of userequipment(UE) Authentication vectors andsecurity keys perUE Alcatel-Lucent8650 SubscriberData Manager Policy and charging rules function (PCRF) Interfaces with application functions such as theproxy-callsession control function (P-CSCF) orotherpolicy enabledapplications Interfaces with thePDN gateway to convey policy decisions to it Decides how services shallbetreatedin the PDN gateway in accor dancewith a usersubscriberpolicy Alcatel-Lucent5780 DSC PDN Gateway (P-GW) PDN gateway Per-userpacketfiltering Lawfulintercept Userequipment(UE) IP address allocation T ransportlevelpacket markingfordownlinking Uplink/downlinkservicelevelcharging,gating, andrateenforcement Downlinkrateenforcement basedon a ggregatemaximumbitrate (AMBR) Alcatel-Lucent7750 ServiceRouter Serving Gateway (S-GW) Localmobility anchorforinter-evolvedNodeB (eNB) handover Mobility anchorfor inter-third-gener ation partnershipproject(3GPP) mobility EvolvedUMTSTerrestrialRadio Access Network (E-UTRAN) idle-modedownlink packetbufferingand initiation of net worktriggeredservice requestprocedure Lawfulintercept Packet routing/forwardi ng T ransportlevelpacket marking(uplinkinganddownlinking) Accountingon userand Quality of Service(QoS) class identifiergranularity forinter-operatorcharging Uplinkanddownlinkc hargingperuser equipment,packetdata node(PDN),and QoSclass identifier(forroamingwith homeroutedtraffic) Alcatel-Lucent7750 ServiceRouter Evolved Node B (eNB) functions Radio resourcemanagement:radio bearer control,radio admission control, connection mobility contr ol,uplink/downlinkscheduling IPheadercompression andcipheringof userdata stream Mobility managemententity (MME) selection Forwardinguplinkdata to servinggateway Paging Schedulingandtransmission of broadcastinformation,originatedfromthe mobility managemententity (MME) oroperations andmaintenance(O&M) Measurementandmeasurementreporting configuration formobility andscheduling Schedulingandtransmission of Earthquak eand TsunamiWarningSystem(ETWS) messages,originatedfromthe MME EPS BEARER (36.300, CLAUSE 13.1): Evolvedpacketswitch (EPS) bearer(36.300,clause13.1): An EPSbeareris an end-to-endtunneldefinedto a specificQoS -A defaultbeareris definedattheuser equipmentinitialattach;radio resou rces a re removedif t heuser equipmentgoes idle -A dedicatedbeareris createdusingsignalingfor specificservices TheQoSmodel is builton theEPSbearer which has f ourparameters associatedto it: - QoSclass identifier(QCI) is an integerwhich provides an index into a tableproviding forwardingtreatmentforthat bearer(in terms of lat ency andpacketloss) - Allocation andretention priori ty (ARP) is usedby theschedulerto providepreemption priority in caseof contention - GuaranteedBitRate (GBR):separately forboth dow nlinks anduplinks. Notean EPS-bea rercan benon-GBR -AggregateMaximumBit Rate(AMBR) specifies downlinkanduplinkbit rates for an aggrega teEPS bearer Servicedata flows (SDF) arespecificpacketflows identifiedby quintupleandassociated to a servicerequiringspecialtreatment SDFs aremappedinto EPSbearers attheuserequipment (foruplinks) andatthePDN gateway (fordownlinks) usinga setof filterrules called trafficflow templates (TFT). PCRF (TS 23.203): Policy rule - Applies a fi lter(TFT) to mapSDFs to EPSbearers - Provides charg inginstructions Extremely flexiblemodel - Dynamicpolicy control -Policy push :User equipment<>application si gnalingdetermines which SDFs to useandwhat policy ruleto installusingthePCRF on thePDN gateway -Policy pull:Thegateway detects an eventwhich trigger s notificati on to t hePCRF to downloada policy rule - Pre-definedpolicy rules -Roamingsupport, otherAN support Chargingfunctions in PCRF - Chargingcorrelation:binds upl inktraffic(per SDF) to IMSsignalinglayer (usefulforvolume metering,forexample) Chargingin PDN gateway andservinggateway (forroamers) - PerSDF statistics collection basedon chargingrules providedby thePCRF -Onlinechargingthrough dia metercreditc ontrol(Gz) -Offlinecharging(Gy) OtherPDN gateway functions -Gate control:allows ordisallows SDF - Flow policing -Markingflows -Metering -Application awareness through DPI Bearerbindingandevent reportingfunction (BBERF) -B earerbindingis thegenericprocedure forassociatinga bearerin theaccess to a SDF - TS23.402 and23.203 defines bearerbindingand eventreportingfunction (BBERF) to supportsituations wherea directpolicy interfaceis needed. CSFB is definedin TS23.272 Dualmode2G/3G andLTE userequipmentis registeredin the 2G/3G circuitdomain butis tun edand connectedto theLTE/EPCnetwork Voicecalls comeinto t hemobile switchingcenter(MSC) TheMSCalerts theuserequipment of incomin gvoice calls throu gh theservinggateway interface,mobility managemententity (MME) andLTE.Note theS101 is us edin theevent theMSC is 3GPP2 (CDMA) Theuserequipmentretunes andreconnects to the2G/3G carrierand accepts calls LTE data session is eithersuspendedoris handed to W-CDMA (if applicable-not shown abov e) SGs in terfacecan also deli verSMS trafficto theuserequipment when in LTE mode LTE with legacy 3GPP interworking (pre-Release 8) LTE with legacy 3GPP interworking (Release 8) LTE with non-3GPP interworking (Release 8) TS 23.401, ANNEX D: Utilizes new LTE elements to emula telegacy elements forinterworking Mobility managemententity (MME) supports Gn/Gp interfaces (TS23.060) forthecontrolplane(based on GTPv1) PDN gateway needs to supportGn/Gpinterfaces (TS23.060) for the controlanduser planes.PDNgatewayalsoacts asaGGSN andcommon anchorfor evolvedpacketcore (ePC) bea rers andpacketdata prot ocol (PDP) contexts. An LTE-capabledevicethatalso supports 2G/3G willaccess APNs through thePDN gateway,which serves as themobility anchor forthe legacy third-generatio n partnershipproject(3GPP) RELEASE 8 METHOD OF INTERWORKING (TS 23.401, CLAUSE 5.5.2): Therelease8 methodof inter-radio access technology (IRAT) in terworking relies on using: New S3 andS4 interfaces,modeledon theS5 and S10 interfaces usedfor S1 basedhandover,to supportsignalinganduser planerequirements -A servingGPRSsupport node(SGSN) th atuses thenew interfaceis calledan S3/S4 SGSN Aserving gateway as a mobility an chorfor intra-3GPPmobility -Mobility managemententity (MME) <>SGSN handovers supportcall flows simil arto thebasic S1-basedhandoverwith MME chan ge (also describedin TS23.401) Advantages of R8 interworking Offers a highly scalablesolution thatleverages new evolved packet core(EPC) elements fora variety of 3GPPaccess options (HSPA+,other2G/3G) Compatiblewith 3G directtunnelapproach (3G DT terminated on a servinggateway) Supports IdleModeSignalingReduction (ISR) INTERWORKIN G WITH NON-3GPP ACCESS NETWORKS (TS 23.402): Fundamentalgoal:Achievemobility with IPaddress preservation when userequipmentselects a non-3GPPaccess Access types Trus tednon-3GPPaccess — WiMAXandhigh ratepacketdata (HRPD) operatedby thesameprovider as LTE -The operatorhas authent icatedusers fortheaccess network - Theoperatorhas implementedsufficientsafeguards to mitig ate potentialattacks Untrustednon-3GPPaccess — third-party WLAN access (homeorbusiness) hotspot - Theoperatorrequires separateauthentication procedur es - Example:WLAN access froma thirdparty (homeorbusiness) hotspot Basics: ThePDN gateway is a mobility anchorfornon-3GPPaccess and supports PMIPv6 LocalMobility Anchor(LMA) function s Theservinggateway (in thec aseof PMIPv6 S5/S8) supports mobile access gateway (MAG) function s TheAccess Network(AN) -HRPD ServingGateway (HSGW) o r Evolved PacketData Gateway (ePDG) -supports PMIPv6 (RFC5123) Otheroptions such as clientMIP,dual-stackMIPand others are supportedin TS23.402 S101 andS103 can optimizethehandoff fromLTE to HRPDwith no packetloss andquicker handoff completion REFERENCES ARE: TS33.401:SAE S ecurity Architecture TS24.301:NAS Protocol TS36.323:PDCPSpecification INTERFACE Gx Gxa,GxbandGxc Rx S9 Sp Gy/Ro Gz/Rf Ga PURPOSE Policy control BBERF as definedin TS23.402 Application function to PCRF RoaminginterconnectforPCRF Retrievingpersubscriber policy dat a On-linecharging Off-linecharging Off-linecharging PROTOCOL Diameter/SCTP Diameter/SCTP Diameter/SCTP Diameter/SCTP Notspecified Diameter/SCTP Diameter/SCTP GTP/UDP REFERENCE TS29.212 TS29.212 TS29.214 TS29.215 Notdefinedin R8 TS30.240 &TS32.299 TS32.251 & TS32.295 TS32.299 Forbackhaulsecurity,follow theSeGWspecification: TS33.210 /TS33.310 LTE interworking options LTE security Voice and SMS interworking options www.alcatel-lucent.com Alcatel,Lucent,Alcatel-Luc entandtheAlcatel-LucentlogoaretrademarksofAlcatel-Lucent.Allothertrademarksarethepropertyoftheirrespectiveowners.Theinformationpresentedis subjecttochangewithoutnotice.Alcatel-Lucentassumesnoresponsibilityforinaccuraciescontainedherein. ©2009Alcatel-Lucent.Allrightsreserved.RMK7526091004(10) S6a S10 S5 S5/S8 S11 SGi Rx X2 S1-U S1-U S1-MME S1-MME Gx LTE-Uu HSS PDN APPLICATIONS CORE RAN UE MME IMS AP PS eNB eNB P-GW PCRF S-GW S1-mobility managemententity (MME) :used forsignalingbetween theEvolvedNode B (eNB) andtheMME S1-U:defines userplanebetween eNB andservinggateways S10:usedby MMEs to supportMME changes X2:used to supportintra-MME handoff with no pa cketloss S11:used by theMME to controlpath switchingandbearerestablishmentin theserving gateway andPDN gateway S6a:usedby theMME to retri evesubscriber data fromhomesubscriber server(HSS) S5:a signalinginterfaceforestablishingbearers between theservinggateway andthe PDN gateway orbetween servinggateways,forserving gateway changes (GTPv2).Italso supports theuserplanefor bearers (GTPv1 ).Note thereis a PMIPv6 version of theS5. Gx:used by thePCRF to convey p olicy enforcementto theP-GW,andalso usedto retrievetrafficflow data. SGi:theinterface into theIPPDN.This is wheretheIP visibility into theUE IPaddress(es) is exposed. S8:analogous to theS5 exceptthatit is usedin roamingscenarios. Rx:used by application functi ons,such as theIMS P-CSCF,to convey policy data to thePCRF. EPC EUTRAN PDN End-to-end service EPSbearer E-RAB S5/S8 bearer External bearer Radi obear er S1 b ea re r eNB UE LTE-UU S5-S8 SGi S1 SGW PGW PEER ENTITY PDN HSS/HLR S5 SGi S1-U S11 S6a Gr Gn Gn Gn (IP/lu-PS) lu-PS/Gb Gi Gn S1-MME 2G/3G GGSN P-GW/ GGSN 2G/3G SGSN UTRAN/ GERAN PDN HSS/HLR S5/S8 SGi S1-U S11 S6a S16 S10 S6d/Gr Gn S4 S12 lu-PS/Gb Gi S3 S1-MME 2G/3G GGSN GERAN/ UTRAN P-GW HSS UserPlane L1/L2 Signaling S1-MME EPS AKA S11 S-GW MME eNB UserPlane S6a EPS AKA RRCSignalingIntegrity Protection (AESandSnow 3G) RRCSignalingCiphering(Null,AESand Snow 3G) UserPlaneCiphering(Null,AES,andS now 3G) NASIntegrity Protection NASCiphering(Null,AES,Snow 3G) PDN HSS/HLR S5 S2a S2b SGi STa S6a S6b SWx S11 S1-MME S103 S101 SWm SWa 3GPP/AAA trusted non-3GPP access (EHRPD) LTE basic nodes and interfaces Bearer architecture L TE policy control and charging EUTRAN EHRPD (trusted non-3GPP access) WLAN (untrusted non-3GPP access) UE S9 Rx Sp S5 S2a SGi S2b GyRo Gz/Rf Gxc(PMIPv6 S5 only) Gxa Gxb Gx Application Function SPR PDN OtherNW PCRF PCRF S6a Sp S10 S5/S8 SGsorS101(forCDMA) S11 SGi Rx X2 S1-U S1-MME Gx HSS INTERNET PSTN&Other Networks APPLICATIONS EPC EUTRAN UE MME APPS eNB eNB BTS P-GW PCRF S-GW MSC S6a APPLICATIONS Voice Call Continuity Telephony Presence SMS/IM Voice Mail Sp Sv S11 SGi Rx Cx Sh Gm S1-U S1-MME Gx IP CORE PSTN&Other Networks IMS EPC EUTRAN UTRAN/GERAN UE MME eNB eNB BTS/NB P-GW PCRF S-GW MSC MGCF/ MGW HSS Session control (CSCF) Media server untrusted non-3GPP access (WLAN) ePDG OfCS OCS GyRo P-GW ePDG HSGW S-GW MME AN (e.g.HSGW) P-GW S-GW EUTRAN R8 SGSN S-GW MME EUTRAN S-GW MME EUTRAN Gz/Rf
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Transcript of LTE Poster
7/27/2019 LTE Poster
http://slidepdf.com/reader/full/lte-poster 1/1
LTE Evolved Packet System Architecture
LTE enables you to redefine the end-user experience
with the most advanced packet-based solution in
the industry. Continuing our 3G partnership into LTE,
the Alcatel-Lucent end-to-end LTE solution provides:
• A comprehensive transformation to an IPinfrastructure with minimal risk
• An open LTE ecosystem of devices, applicationsand content providers
• Smooth interworking with existing 2G/3G networksand evolution to the next generation For more information, visit:
www.alcatel-lucent.com/LTEinfo
or call your Alcatel-Lucent representative.
• IMSarchitectureis describedin TS23.228
• IMSsupports VoIPon EV-DO,HSPA+and LTE
• SingleRadio VoiceCall Continuity (SRVCC) IMSsupports optimizedhandoff of calls between VoIPdomains andwireless circuitdomainsusingtheVoice CallContinuity (VCC) application server(TS23.216)
• IMScentralizedservices (ICS) (TS23.292) andservice centralization andcontinuity (SCC) (TS23.237) enableIMSservices foruser equipmentinthecircuit-switcheddomain
Circuit-switched (CS) fall back
IMS - Industry-standard service architecture
Mobility Management Entity (MME) functions• Non-Access Stratum(NAS) signaling(attachment,bearersetup/deletion)
• NASsignalingsecurity
• Signalingformobility between 3GPPaccess networks (S3)
• Idlemodeuser equipmentreachability
• TrackingArea listmanagement
• PDN gateway andservinggateway selection
• MME selection forhandoffs with MME change
• Roaming-s6a to homesubscriberserver (HSS)
•Authentication
•
Bearermanagementfunctions includingdedicatedbearerestablishment• SupportforEarthquakeand TsunamiWarningSystem(ETWS) messagetransmission
•Alcatel-Lucent9471 MME
User Equipment (UE) functions• Contains theUniversalSubscriberIdentity Module(USIM) which holds
authentication information
• Supports services andapplications
• Monitors radios andconveys performanceto theEvolved NodeB (eNB) channelquality indicator(CQI)
• Supports LTE uplinkanddownlink airinterface
• Maps upstreamtrafficinto trafficclasses thataredefinedby upstreamtrafficflow templates
Home Subscriber Server (HSS)• Storageof subscriberdata
• EnhancedPresenceService (EPS) QoSsubscriberprofile
• Roamingrestrictions list
•AccessibleAccess PointNames (APNs)
•Address of currentserving mobility managemententity (MME)
• CurrentTrackingArea (TA) of userequipment(UE)
•Authentication vectors andsecurity keys perUE
•Alcatel-Lucent8650 SubscriberData Manager
Policy and charging rules function (PCRF)• Interfaces with application functions such as theproxy-callsession controlfunction
(P-CSCF) orotherpolicy enabledapplications
• Interfaces with thePDN gateway to convey policy decisions to it
• Decides how services shallbetreatedin the PDN gateway in accordancewitha usersubscriberpolicy
•Alcatel-Lucent5780 DSC
PDN Gateway (P-GW)• PDN gateway
• Per-userpacketfiltering
• Lawfulintercept
• Userequipment(UE) IPaddress allocation
• Transportlevelpacketmarking fordownlinking
• Uplink/downlinkservicelevelcharging,gating, andrateenforcement
• Downlinkrateenforcement basedon aggregatemaximumbitrate (AMBR)
•Alcatel-Lucent7750 ServiceRouter
Serving Gateway (S-GW)• Localmobility anchorforinter-evolvedNodeB (eNB) handover
• Mobility anchorforinter-third-generation partnershipproject(3GPP) mobility
• EvolvedUMTSTerrestrialRadio Access Network(E-UTRAN) idle-modedownlinkpacketbufferingandinitiation of networktriggeredservice requestprocedure
• Lawfulintercept
• Packetrouting/forwarding
• Transportlevelpacketmarking (uplinkinganddownlinking)
•Accountingon userand Quality of Service(QoS) class identifiergranularityforinter-operatorcharging
• Uplinkanddownlinkc hargingperuser equipment,packetdata node(PDN),andQoSclass identifier(forroamingwith homeroutedtraffic)
•Alcatel-Lucent7750 ServiceRouter
Evolved Node B (eNB) functions• Radio resourcemanagement:radio bearercontrol,radio admission control,
connection mobility control,uplink/downlinkscheduling
• IPheader compression andcipheringof userdata stream
• Mobility managemententity (MME) selection
• Forwardinguplinkdata to servinggateway
• Paging
• Schedulingandtransmission of broadcastinformation,originatedfrom themobilitymanagemententity (MME) oroperations andmaintenance(O&M)
• Measurementandmeasurementreportingconfiguration formobility andscheduling
• Schedulingandtransmission of Earthquakeand TsunamiWarningSystem(ETWS)messages,originatedfromthe MME
EPS BEARER (36.300, CLAUSE 13.1) :
• Evolvedpacketswitch (EPS) bearer(36.300,clause13.1):
•An EPSbeareris an end-to-endtunneldefinedto a specificQoS
-A defaultbeareris definedattheuser equipmentinitialattach;radio resources areremovedif theuserequipmentgoes idle
-A dedicatedbeareris createdusingsignalingfor specificservices
• TheQoS modelis builton theEPSbearer which has fourparameters associatedto it:
-QoS class identifier(QCI) is an integerwhich provides an index into a tableprovidingforwardingtreatmentforthat bearer(in terms of latency andpacketloss)
-Allocation andretention priority (ARP) is usedby thescheduler to providepreemption
priority in caseof contention-GuaranteedBit Rate(GBR):separately forboth downlinks anduplinks.
Notean EPS-bearercan benon-GBR
-AggregateMaximumBit Rate(AMBR) specifies downlinkanduplinkbit rates foran aggregateEPS bearer
• Servicedata flows (SDF) arespecificpacketflows identifiedby quintupleandassociatedto a servicerequiringspecialtreatment
• SDFs aremappedinto EPSbearers atthe userequipment(for uplinks) andatthe PDNgateway (fordownlinks) usinga setof filterrules called trafficflow templates (TFT).
PCRF (TS 23.203):
• Policy rule
-Applies a filter(TFT) to mapSDFs to EPSbearers
-Provides charginginstructions
• Extremely flexiblemodel
-Dynamicpolicy control
-Policy push:Userequipment <>application signalingdetermines which SDFsto useandwhat policy ruleto installusingthePCRF on thePDN gateway
-Policy pull:Thegateway detects an event which triggers notification to thePCRFto downloada policy rule
-Pre-definedpolicy rules-Roamingsupport,other AN support
• Chargingfunctions in PCRF
-Chargingcorrelation:binds uplinktraffic(perSDF) to IMSsignalinglayer(usefulforvolume metering,forexample)
• Chargingin PDN gateway andservinggateway (forroamers)
-Per SDF statistics collection basedon chargingrules providedby thePCRF
-Onlinecharging through diametercreditcontrol(Gz)
-Offlinecharging(Gy)
• OtherPDN gateway functions
-Gate control:allows ordisallows SDF
-Flow policing
-Markingflows
-Metering
-Application awareness through DPI
• Bearerbindingand eventreportingfunction (BBERF)
-Bearer bindingis thegenericprocedurefor associatinga bearerin theaccess to a SDF
-TS 23.402 and23.203 defines bearerbindingandeventreporting function (BBERF)to supportsituations wherea directpolicy interfaceis needed.
• CSFB is definedin TS23.272
• Dualmode2G/3G andLTE userequipmentis registeredin the2G/3Gcircuitdomain butis tunedand connectedto theLTE/EPCnetwork
•Voicecalls comeinto themobileswitching center(MSC)
• TheMSC alerts theuser equipmentof incomingvoice calls throughtheservinggateway interface,mobility managemententity (MME)andLTE.Note theS101 is usedin theevent theMSC is 3GPP2 (CDMA)
• Theuser equipmentretunes andreconnects to the2G/3G carrierandaccepts calls
• LTE data session is eithersuspendedoris handed to W-CDMA(if applicable- notshown above)
• SGs interfacecan also deliverSMStrafficto theuser equipmentwhenin LTE mode
LTE with legacy 3GPP interworking (pre-Release
LTE with legacy 3GPP interworking (Release 8)
LTE with non-3GPP interworking (Release 8)
TS 23.401, ANNEX D:
Utilizes new LTE elements to emulatelegacy elements for interworking
• Mobility managemententity (MME) supports Gn/Gpinterfaces(TS23.060) forthecontrolplane(based on GTPv1)
• PDN gateway needs to supportGn/Gpinterfaces (TS23.060) forthecontrolanduser planes.PDNgatewayalsoacts asaGGSN andcommonanchorforevolved packetcore(ePC) bearers andpacket data protocol(PDP) contexts.
An Lthroforth
RELEASE 8 METHOD OF INTERWORKING (TS 23.401, CLAUSE 5.5.2)
Therelease8 methodof inter-radio access technology (IRAT) interworkingrelies on using:
• New S3 andS4 interfaces,modeledon theS5 and S10 interfaces usedforS1 basedhandover,to supportsignalinganduser planerequirements
-A servingGPRSsupport node(SGSN) thatuses thenew interfaceiscalledan S3/S4 SGSN
•Aserving gateway as a mobility anchorfor intra-3GPPmobility
-Mobility managemententity (MME) <>SGSN handovers supportcallflows similarto thebasicS1-based handoverwith MME change(also describedin TS23.401)
Adv
• Offepack(HSP
• Comon a
• Supp
INTERWORKING WITH NON-3GPP ACCESS NETWORKS (TS 23.402):
Fundamentalgoal:Achievemobility with IPaddress preservation whenuserequipmentselects a non-3GPPaccess
Access types
• Trustednon-3GPPaccess —WiMAX andhigh ratepacketdata (HRPD)operatedby thesameprovider as LTE
-The operatorhas authenticatedusers forthe access network
-The operatorhas implementedsufficientsafeguards to mitigatepotentialattacks
• Untrustednon-3GPPaccess — third-party WLAN access(homeorbusiness) hotspot
-Theoperator requires separateauthentication procedures
-Example:WLAN access froma thirdparty (homeorbusiness) hotspot
Basi
• ThePsupp
• Thesacce
• TheAEvol
• Othesupp
• S101no p
REFERENCES ARE:
• TS33.401:SAE Security Architecture
• TS24.301:NAS Protocol
• TS36.323:PDCP Specification
INTERFACE
Gx
Gxa,GxbandGxc
Rx
S9
Sp
Gy/Ro
Gz/Rf
Ga
PURPOSE
Policy control
BBERF as definedin TS23.402
Application function to PCRF
RoaminginterconnectforPCRF
Retrievingpersubscriber policy data
On-linecharging
Off-linecharging
Off-linecharging
PROTOCOL
Diameter/SCTP
Diameter/SCTP
Diameter/SCTP
Diameter/SCTP
Notspecified
Diameter/SCTP
Diameter/SCTP
GTP/UDP
REFERENCE
TS29.212
TS29.212
TS29.214
TS29.215
Notdefinedin R8
TS30.240 &TS32.299
TS32.251 & TS32.295
TS32.299
ForbTS33
LTE interworking opt
LTE security
Voice and SMS interworking options
www.alcatel-lucent.comAlcatel,Lucent,Alcatel-LucentandtheAlcatel-Lucentlogo aretrademarks of Alcatel-Lucent.Allothertrademarks aretheproperty of theirrespectiveowners.T
©2009 Alcatel-Lucent.Allrights reserved.RMK7526091004 (10)
S6a
S10
S5
S5/S8
S11
SGi
Rx
X2
S1-U
S1-U
S1-MME
S1-MMEGx
LTE-Uu
HSS
PDN
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A PPL ICA T IO N SCO RERANUE
MME
I MS A PP S
eNB
eNB P-GW
PCRF
S-GW
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• • • • •
S1-mobility managemententity (MME):used forsignalingbetween theEvolvedNode B(eNB) andtheMME
S1-U:defines userplanebetween eNB andservinggateways
S10:usedby MMEs to supportMME changes
X2:used to supportintra-MME handoff with no packetloss
S11:used by theMME to controlpath switchingandbearerestablishmentin theservinggateway andPDN gateway
S6a:usedby theMME to retrievesubscriber data fromhomesubscriber server(HSS)
S5:a signalinginterfaceforestablishingbearers between theservinggatewayandthe PDN gateway orbetween servinggateways,forserving gateway changes(GTPv2).Italso supports theuserplanefor bearers (GTPv1).Note thereis a PMIPv6version of theS5.
Gx:used by thePCRF to convey policy enforcementto theP-GW,andalso usedtoretrievetrafficflow data.
SGi:theinterface into theIPPDN.This is wheretheIP visibility into theUE IPaddress(es)is exposed.
S8:analogous to theS5 exceptthatit is usedin roamingscenarios.
Rx:used by application functions,such as theIMS P-CSCF,to convey policy data tothePCRF.
EPCEU T RA N PD N
End-to-end service
EPSbearer
E-RAB S5/S8 bearer
External bearer
R ad io b ea re r S 1 b ea re r
eNBUE
LTE-UU S5-S8 SGiS1
SGW PGW PEERENTITY
HSS/HLR
S1-U
S11
S6a
Gr
Gn
Gn
Gn (IP/lu-PS)
lu-PS/Gb
Gn
S1-MME
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2G/3GSGSN
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UTRAN/
GERAN
HSS/HLR
S1-U
S11
S6a
S16
S10
S6d/Gr
Gn
S4
S12
lu-PS/Gb
S3
S1-MME
GERAN/
UTRAN
• •
• •
• • • • •
• •
• • • •
• • • •
• •
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• •
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• • • •
UserPlane
L1/L2 Signaling
EPS AKA
eNB
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
• RRCSignalingIntegrity Protection (AESandSnow 3G)• RRCSignalingCiphering(Null,AES andSnow 3G)• UserPlaneCiphering(Null,AES, andSnow 3G)
• NASIntegrity Protection• NASCiphering(Null,AES, Snow 3G)
S5
S2a
S2b
STa
S6a
S6b
S11S1-MME
S103S101
trustednon-3GPP access
(EHRPD)
LTE basic nodes and interfaces
Bearer architecture LTE policy control and charging
EUTRAN
EHRPD
(trusted non-3GPP access)
WLAN(untrusted non-3GPP access)
UE
S9
Rx
Sp
S5
S2a
SGi
S2bGyRoGz/Rf
Gxc(PMIPv6 S5 only)
G xa G xb
Gx
• • • • • • • • • • • • • • • • • • • • • • • • • •• • • • • • • • • • • • • • • • • • • • • •
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• • • • • • • • • • • • • • • • • • • • • • • • • •
Application
Function
SPR
PDN
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OtherNW
PCRF
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
PCRF
S6a
SpS10
S5/S8
SGsorS101 (forCDMA)
S11
SGi
Rx
X2
S1-U
S1-MME Gx
HSS
INTERNET
PSTN&Other
Networks
• •
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• • • • • • • • • • • • • • • • • • • • •
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A PPL ICA T IO N SEPCEUT RA NUE
• •
• •
•
MME
APPSeNB
eNB
BTS
P-GW
PCRF
S-GW
MSC
•
•
• • • • • • • • •
• •
• • •
S6a
APPLICATIONSVoice Call Continuity
Telephony
Presence
SMS/IM
Voice MailSp
Sv
S11
SGi
Rx
Cx
Sh
Gm
S1-U
S1-MME
Gx
IP CORE
PSTN&Other
Networks
• •
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• • • • • • • • • • • • • • • • • • •
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• • • • • • • • • • • • • • • • • • • • • •
• • • • • • • •
• • •
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•
IM SEPCEUT RA N
UT RA N /G ERA N
UE
MME
eNB
eNB
BTS/NB
P-GW
PCRF
S-GW
MSC
MGCF/ MGW
HSS
Session control
(CSCF)
Mediaserver
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
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• • • • • • • • • •
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
untrustednon-3GPP access
(WLAN)ePDG
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OfCS
OCS• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
GyRo
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P-GW
ePDG
HSGW
S-GW
MME
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• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
• • • • • • •• • • •
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AN(e.g.HSGW)
P-GW
• • • • •
S-GWEUTRAN
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R8SGSN
S
MMEEUTRAN
• • • • • • • • • • • • • • •
MMEEUTRAN
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• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
• • • • • • • • • • • • • • • • • • •
Gz/Rf
