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SAE/EPC overview
TRAINING TELECOMThe way to perfection
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3GPP
3rd Generation Partnership Project is
a collaboration between groups of
telecommunications associations
3gpp.org
Technology, specification, documentation
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Whi is an SAE necessary?
Integration of E-UTRAN with its new Concepts IP-centric setup
Low Latency Requirements
Packet-switched only
QoS and Services Differentiation Integration of Non-3GPP RAT's is sub-optimum because
Mobility between 3GPP-RAT and Non-3GPP-RAT doesalmost not exist
Non-3GPP-RAT's are conceptually treated as "alien"technologies to be amended to existing 3GPP-RAT's
legacy operators of Non-3GPP-RAT's cannot adopt theexisting 3GPP-CN-Architecture
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Important Requirements on SAE
according to 3GPP
Coexistence With legacy architectures
Equal Support of IPv4 and IPv6
Service Continuation Upon Change of RAT
Upon Change between circuit-switched and packet-switched radio access
Better Performance
Lower latency Process higher data rates
Better security
QoS and service differentiation
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Important Requirements on SAE
according to 3GPP
Support of any Radio Access Technology (RAT) Existing and future
3GPP and non-3GPP
Trusted and non-trusted
Circuit-switched fallback
Management of Access Networks ANDSF
Access network sharing Load sharing among access networks
Auto configuration
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Seamless Mobility Options and their
Characteristics
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Architecture Overview
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EPC vs. EPS
The two terms EPC and EPS can be
distinguished as illustrated:
The EPC represents the core component of the
EPS.
The EPS contains the EPC and the E-UTRAN (LTE)
access network. However, it does not contain the
other access networks.
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Non-3GPP Access Networks (trusted / non-trusted)
Non-3GPP Access Networkwifi, WiMAX,
cdma2000
Trusted Non-3GPPsupport security
requirements of EPC-operator
Non-trusted Non-3GPPdoesnt support
security requirements of EPC-operator
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EPS Elements Overview
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MME
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EPS Elements Overview
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SGW - Serving Gateway
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EPS Elements Overview
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PDN-GW
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EPS Elements Overview
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e-PDG
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EPS Elements Overview
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PCRF
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EPS Elements Overview
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HSS
Home Subscriber Server User identification and addressingthis corresponds to the IMSI
(International Mobile Subscriber Identity) and MSISDN (MobileSubscriber ISDN Number) or mobile telephone number
User profile informationthis includes service subscription states anduser-subscribed Quality of Service information (such as maximum
allowed bit rate or allowed traffic class). Mutual network-terminal authentication.
Radio path ciphering and integrity protection, to ensure data andsignalling transmitted between the network and the terminal isneither eavesdropped nor altered.
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Any question?
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Objectives
Network Access to the EPC in case of 3GPP-
RAT's
Network Access in case of Non-3GPP RAT's
Voice Call Establishment
Micro Mobility / Intra-RAT Roaming
Macro Mobility / Inter-RAT Roaming
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Network Access to the EPC in case of
3GPP-RAT's
Signaling and Important State Changes (EMM, ECM, ESM)
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Network Access to the EPC in case of
3GPP-RAT's
GERAN / UTRAN
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Network Access to the EPC in case of
3GPP-RAT's
Signaling Procedures (GMM/PMM, SM)
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Network Access in case of Non-3GPP
RAT's
Network Discovery and Selection
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Network Access in case of Non-3GPP
RAT's
Interworking with the ANDSF
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Network Access in case of Non-3GPP
RAT's
Distinction Trusted vs. Non-Trusted Non-3GPP RAT's
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Network Access in case of Non-3GPP
RAT's
Trusted Non-3GPP RAT's
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Network Access in case of Non-3GPP
RAT's
Signaling Procedures if EAP and PMIPv6 are used
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Network Access in case of Non-3GPP
RAT's
Signaling Procedures if MIPv4 is used
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Network Access in case of Non-3GPP
RAT's
Non-Trusted Non-3GPP RAT's
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Network Access in case of Non-3GPP
RAT's
Signaling Procedures if IKEv2 and PMIPv6 are used
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Network Access in case of Non-3GPP
RAT's
Signaling Procedures if IKEv2 and DSMIPv6 are used
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Voice Call Establishment
IMS based(Related Network Architecture)
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Voice Call Establishment
Signaling Procedure (SIP, SDP, DIAMETER)
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Voice Call Establishment
Circuit-switched Fallback(Related Network Architecture)
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Voice Call Establishment
Signaling Procedure for MOC (CS-Fallback)
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Voice Call Establishment
SRVCCSingle Radio Voice Call Continuity
1. UE to MMEhandover to 3G
2. MME to eMSC - SRVCC PS to CS Request
3. eMSC to MME - SRVCC PS to CS Complete Notification4. UE transfered to 3G
5. SGSN to MMESGSN Context Transfer
6. MME deleted Dedicatied Bearer
7. MME to SGSN - SGSN Context Response
8. UE transferred to 3G seamless with voice and data
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X2-AP (X2Application Protocol)
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X2-AP and SCTP
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Intra-E-UTRAN handover (X2-based)
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S-GW relocation (X2-based)
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MME relocation (1)
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MME relocation (2)
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Macro Mobility / Inter-RAT Roaming
Handover E-UTRAN to Trusted Non-3GPP RAT(Related NetworkArchitecture)
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Macro Mobility / Inter-RAT Roaming
Signaling Procedure (NBM / PMIPv6 on S2a)
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?
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Thank you!
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