Evolution of the 3GPP Network Architecture, (the Evolved Packet Core)

Transcription

1 Evolution of the 3GPP Network Architecture, (the Evolved Packet Core) Dr. Sungho Choi Vice Chairman of 3GPP TSG SA 1

2 Peak Data Rate (bps) DL/UL Air Interface Technology Evolution OFDMA 300M/75M Rel. 8 & 9 LTE WCDMA Rel. 7 HSPA+ 84M/23M Rel. 99 WCDMA Rel. 4 TD-SCDMA Rel. 5 HSDPA 14M/768K Rel. 6 HSUPA 14M/5.7M 28M/11.5M 42M/5.7M Rel. 8 HSPA+ Rel. 9 HSPA+ 2M/768K 00 2M/768K

3 Network Architecture Evolution PSTN Operator s IP Services (e.g., IMS, PSS etc) Operator s IP Services (e.g., IMS, PSS etc) GGSN P-GW Circuit/GPRS Core Network MSC SGSN MME S-GW Evolved Packet Core Network RNC Node B enode B Control Plane delay : 100ms User Plane delay : 5ms

4 3GPP Organization structure Project Coordination Group TSG RAN Radio Access N/W TSG SA System Architecture TSG CT Core Network&Terminal TSG GERAN GSM/EDGE RAN RAN1 Radio Layer 1 SA1 Services CT1 NAS (UE-MME I/f) GERAN1 PHY RAN2 SA2 CT3 GERAN2 Radio Layer2/3 Architecture/Stage2 Network I/F to out Layer2/3, Access I/F RAN3 SA3 CT4 GERAN3 Access I/F Security Network I/F in 3GPP Conformance Test RAN4 Radio Performance SA4 Codec CT6 UICC I/F Smart Card Appl. RAN5 SA5 Conformance Test O&M, Charing 4

5 Key LTE/SAE Features Rel.8 LTE (~09/03) Rel.9 LTE (~10/03) 20MHz, OFDM New Air DL 4x4 MIMO SON, HeNB Enhanced Dual-Layer Tx SON/HeNB Enhancement SAE For LTE Access CS Fallback in EPS Single Radio VCC IMS Emergency Calls LCS for LTE and EPS MBMS support in EPS Peak: DL 300Mbps, UL 75Mbps Peak: DL 300Mbps, UL 75Mbps SON: Self Organizing Network, HeNB: Home enb, SAE: System Architecture Evolution 5

6 Many 3GPP access technologies Mobility between access technologies Multiple roaming models Non-3GPP accesses LTE LTE2600 LTELTE1800 LTE Evolved Packet System architecture HPLMN S6a S8 HSS PDN Gateway Gx hpcrf vpcrf S9 Rx SGi S6 b SWx Operator's IP Services (e.g. IMS, PSS etc.) SWd 3GPP AAA Server GSM450 GERAN GSM900 EDGE GSM1900 UTRAN GSM1800 UTRAN UTRAN HSPA 3GPP Access VPLMN Non - 3GPP Networks Serving Gateway Gxc Gxa Gxb epdg SWn SWm 3GPP AAA Proxy UTRAN HSPA+ Trusted Non - 3GPP IP Access Untrusted Non - 3GPP IP Access SWa STa HRPD S2c S2c UE 1xRTT 3GPP WLAN WIMAX 6 S2c

7 CS Fallback in EPS Application of CSFB: CS capable device camping on LTE cell can establish/receive CS services PCRF Operators IP Services Reuse of existing CS infrastructure for voice service until IMS VoIP is deployed Provide voice roaming support with LTE Can support emergency calls using existing CS infrastructure GMSC HSS MSC RNC MME PDN Gateway Serving Gateway SMS can be delivered to the UE without redirecting to CS Domain Node B enb UE 7

8 Single Radio Voice Call Continuity SRVCC use case: IMS call initiated in LTE can continue in CS domain after moving outside of LTE coverage area SR-VCC is invoked if no other VoIP capable PS system (HSPA/eHRPD) is available for VoIP PS-PS HO Requires overlapping with GSM/WCDMA/1xRTT coverage HSS SCC AS IMS MGW S-CSCF P-CSCF PDN Gateway UE SRVCC improvements: Mid-call services (like HOLD & MPTY) emergency calls video calls MSC Server RNC Node B MME Serving Gateway enb UE UE UE 8

9 3GPP Schedule H 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q 1Q 2Q 3Q 4Q Rel.8 Rel.8 Commercialization First LTE launch (09/12) Rel.9 09/12 Stage 3 10/03 ASN.1 Freeze Test spec Rel.10 Stage 1 10/03 10/09 11/03 Stage 2 Stage 3 11/06 ASN.1 Freeze Test spec Rel.11 11/09 12/03 12/09 12/12 Stage 1 Stage 2 Stage 3 ASN.1 Freeze Test spec 9

10 Key Rel.10/Rel.11 Features Rel.8 LTE (~09/03) 20MHz, OFDM New Air DL 4x4 MIMO/ UL 1x2 MIMO SON, HeNB SAE For LTE Access CS Fallback in EPS Single Radio VCC Peak: DL 300Mbps, UL 75Mbps Rel.9 LTE (~10/03) Enhanced Dual-Layer Tx SON/HeNB Enhancement IMS Emergency Calls LCS for LTE and EPS MBMS support in EPS Peak: DL 300Mbps, UL 75Mbps Rel.10 LTE-Adv (~11/06) DL 8x8 MIMO, UL 4x4 MIMO Carrier Aggregation HetNet, MDT HeNB Local IP Access Wifi offloading Machine Type Communication Peak: DL 1Gbps, UL 500 Mbps Rel.11 (~12/12) CoMP Enhancement of Rel.10 features System Improvement of MTC Service Awareness and Privacy Policies IW MNO and Application Provider Data Application Impacts 10

11 Local IP Access (LIPA) All traffic on 3GPP radio LIPA is primarily for end user s benefit, to allow access to local residential or corporate network through a 3GPP device IP traffic to mobile operator s CN Mobile operator s core network UE Local IP traffic logical connection for mobile operator IP traffic scope of Local IP access Residential/ enterprise IP Network LIPA provides access for IP capable UEs that are connected via a H(e)NB subsystem to other IP capable entities in the same residential/ enterprise IP network. Simultaneous access from a UE to the mobile operator s core network and Local IP Access to a residential/enterprise IP network will be supported. 11

12 WLAN Offloading WLAN offloading refers to the dual radio scenario where part of the traffic is routed via WLAN access and part via 3GPP access WLAN offloading covers both the scenario where the traffic via WLAN radio is anchored in the EPC (i.e., seamless offloading) and the scenario where it is not anchored (i.e., non-seamless offloading) Access Network Discovery and Selection Function (ANDSF) is there to provide the UE with the access network discovery information and the policy on how to use the available access networks Available access networks Preferred routing of the traffic per APN, per IP flow ANDSF EPC HA WLAN 3GPP RAT UE 12

13 Machine Type Communication M2M is recognized as a key segment in future packet networks Initial 3GPP efforts have focused on the ability to differentiate machinetype devices This allows the operator to selectively handle such devices in overload situations Low priority indicator has been added to the relevant UE-network procedures Overload and Congestion control is done on both core network and radio access network based on this indicator Overload MTC server FAIL!!! MTC server Pool of MTC devices 13

14 MTC basic architecture Work in progress Gr/S6a HLR / HSS Legacy SMS IP SMS SMS-SC IP-SM-GW MTCsms Indirect model service provider controlled Indirect model operator controlled SGSN / MME Internal interfaces (TBD) Proxy (TBD) MTCsp M2M Application UE Um / Uu / LTE-Uu RAN GGSN / PGW / PDG MTCi MTC Server API M2M Application MTC User Control plane User plane Gi/SGi 3GPP Boundary Direct model 14

15 Evolution of MTC Further functionality being added to 3GPP standards in the following areas Reachability Aspects, MTC Feature control, Device Triggering Addressing, Identifiers - especially removal of MSISDN dependencies in the architecture Signaling Optimizations, Small Data Transmissions, MTC Monitoring MTC is a substantial technical area, full completion will span across multiple future Releases 15

16 Rel.11: Service Awareness and Privacy Policies Analyzing traffic, standardization of detecting the service traffic and applying the policy Traffic Detection Function newly defined Performs the following for the Detected traffic Gating of the detected service traffic either blocking or permitting unrestricted Traffic Shaping of the detected service traffic Redirecting of detected service traffic UDR/SPR 3) Install the changed Rule PCRF 0) Get subscription including PCC info Sd 1) Request Detection (application id,..) 2) Report Detection (service flow info, ) MME enb SGW PGW TDF TDF: Traffic Detection Function 16

17 Rel.11: IW MNO and Data Application Provider Interface will be provided toward 3rd Party Data Application Provider The following services will be proved over the newly defined interface Customised billing/charging, Promotion services, Group addressing capabilities, identity services, statistics etc 17

18 Study on Non-MTC Mobile Data Application Impacts Study on Service Scenario and Use case on Mobile data application Study on Network inefficiency from Mobile data application # of messages per Busy Hour (Problem 1) Connection mgmt traffic Congestion Service request : Idle to active transition (Problem 2) MME Surge of attach reqs Overload Old enb fail! MME Overload HSS Reg to new enb HSS <Flood of registration by special event> <Failure/restart of nodes> 18

19 Thank You Dr. Sungho Choi 3GPP TSG SA chairman More Information about 3GPP: 19