SAE architecture.pdf

8/12/2019 SAE architecture.pdf

1/54

SAE/EPC overview

TRAINING TELECOMThe way to perfection


2/54


3/54

3GPP

3rd Generation Partnership Project is

a collaboration between groups of

telecommunications associations

3gpp.org

Technology, specification, documentation


4/54

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


5/54

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


6/54

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


7/54

Seamless Mobility Options and their

Characteristics


8/54

Architecture Overview


9/54

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.


10/54

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


11/54

EPS Elements Overview


12/54

MME


13/54



14/54

SGW - Serving Gateway


15/54



16/54

PDN-GW


17/54



18/54

e-PDG


19/54



20/54

PCRF


21/54



22/54

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.


23/54

Any question?


24/54

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


25/54


26/54

Network Access to the EPC in case of

3GPP-RAT's

Signaling and Important State Changes (EMM, ECM, ESM)


27/54


3GPP-RAT's

GERAN / UTRAN


28/54


3GPP-RAT's

Signaling Procedures (GMM/PMM, SM)


29/54

Network Access in case of Non-3GPP

RAT's

Network Discovery and Selection


30/54


RAT's

Interworking with the ANDSF


31/54


RAT's

Distinction Trusted vs. Non-Trusted Non-3GPP RAT's


32/54


RAT's

Trusted Non-3GPP RAT's


33/54


RAT's

Signaling Procedures if EAP and PMIPv6 are used


34/54


RAT's

Signaling Procedures if MIPv4 is used


35/54


RAT's

Non-Trusted Non-3GPP RAT's


36/54


RAT's

Signaling Procedures if IKEv2 and PMIPv6 are used


37/54


RAT's

Signaling Procedures if IKEv2 and DSMIPv6 are used


38/54


IMS based(Related Network Architecture)


39/54


Signaling Procedure (SIP, SDP, DIAMETER)


40/54


Circuit-switched Fallback(Related Network Architecture)


41/54


Signaling Procedure for MOC (CS-Fallback)


42/54


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


43/54

X2-AP (X2Application Protocol)


44/54

X2-AP and SCTP


45/54

Intra-E-UTRAN handover (X2-based)


46/54

S-GW relocation (X2-based)


47/54

MME relocation (1)


48/54

MME relocation (2)


49/54


Handover E-UTRAN to Trusted Non-3GPP RAT(Related NetworkArchitecture)


50/54


Signaling Procedure (NBM / PMIPv6 on S2a)


51/54


52/54


53/54

?


54/54

Thank you!

WWW.TRAININGTELECOM.COM

SAE architecture.pdf

Documents

Transcript of SAE architecture.pdf