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39018631 lte-overview 39018631 lte-overview Presentation Transcript

  • LTE Overview
  • Topics What is LTE? Why LTE is needed? Reference Architecture E-UTRAN Architecture EPC Components, Functions and Interfaces  MME  SGW  PDN-GW Support Information  Acronyms  Standards References
  • LTE, EPS, E-UTRAN and EPC 3GPP LTE (Long Term Evolution), an evolution of GSM/UMTS, specifies the next generation 3GPP mobile broadband network The mobile broadband network is called Evolved Packet System (EPS) The EPS consists of Evolved UTRAN (E-UTRAN) and Evolved Packet Core (EPC) For 3GPP high level requirements on UTRA-UTRAN Long Term Evolution (LTE) and 3GPP System Architecture Evolution (SAE), read http://www.3gpp.org/Highlights/LTE/lte.htm Phase 4 Chalk talks, EPC FDD links:  http://mobility.ih.lucent.com/~jlic/lte.htm  EPC FDD 7090: http://mobility.ih.lucent.com/~slaha/LTE/ MME sites:  https://sps.ndc.lucent.com/sites/wireless.mme/default.aspx - App Arch  https://sps.ndc.lucent.com/sites/wireless.mme_sae/default.aspx - SAE
  • Mobile Evolution and 3GPP Releases CDMA Real-Time Services Voice, SMS Web Browsing Media Streaming VoIP MultimediaRadio Technology RAN W-CDMA Transport TDM QPSK ATM, FR, HDLC IP/Ethernet OFDM/SC-FDMA  Higher access bandwidth, new spectrum available W-CDMA W-CDMA W-CDMA 64QAM/MIMO 16QAM/QPSK 16QAM  New subscriber apps 64QAM/MIMO  Lower cost per Mbit transport Shift towards All-IP and flat/mesh topologies IP is the foundation for new multimedia services and multiservice transport
  • What Does LTE Mean to End Users & Service Providers? Performance Impact to End User Impact to Service Provider Improvement INCREASED SPECTRAL  Lower costs – flat fee  Can buy the same amount of spectrum and pump EFFICIENCY pricing more data to users, or less spectrum to maintain Uplink: 2.00-2.25x vs. 3G the same level of data usage Downlink: 1.25x vs. 3G  Reduced cost per bit FASTER SPEEDS  Faster downloads of multi- More ways to splice bandwidth: Uplink: 2.00-2.25x vs. 3G media Same # of users with more bandwidth/user or more  Better experience with users with same bandwidth per user Downlink: 3x vs. 3G Peak rate = 100 Mbps blended services INCREASED VOICE  Better voice quality  Support more voice users CAPACITY 10 MHz: 2x vs. 3G REDUCED LATENCY  Faster reactions when  Can reuse applications across wireless and < 50 ms gaming wireline  Better voice, video  More capacity for VoIP and TCP-based applications telephony Comparisons based on average aggregate performance
  • 3GPP Requirements For LTE Spectrum efficiency  DL : 3-4 times HSDPA for MIMO(2,2)  UL : 2-3 times E-DCH for MIMO(1,2) Frequency Spectrum :  Scalable bandwidth : 1.4, 3, 5, 10, 15, 20MHz  To cover all frequencies of IMT-2000: 450 MHz to 2.6 GHz Peak data rate (scaling linearly with the spectrum allocation)  DL : > 100Mb/s for 20MHz spectrum allocation  UL : > 50Mb/s for 20MHz spectrum allocation Capacity  200 users for 5MHz, 400 users in larger spectrum allocations (active state) Latency  C-plane : < 100ms to establish U-plane  U-plane : < 10ms from UE to server Coverage  Performance targets up to 5km, slight degradation up to 30km Mobility  LTE is optimized for low speeds 0-15km/h but connection maintained for speeds up to 350 or 500km/h  Handover between 3G & 3G LTE  Real-time < 300ms  Non-real-time < 500ms
  • LTE Key Technologies OFDMA (DL) / SC-FDMA (UL) : Robust modulation in dense environments  Increased spectral efficiency  Simplified Rx design  cheaper UE  Scalable - go beyond 5 MHz limitation MIMO: Increased link capacity  Multiple-input, multiple-output UL& DL  Collaborative MIMO (UL)  Overcome multi-path interference IP Core: flat, scalable Call Servers  Short TTI: 1 ms (2 ms for HSPA) eNode B  Backhaul based on IP / MPLS transport MME High availability Media  Fits with IMS, VoIP, SIP Gateways IP Backbone S/P GW
  • LTE End to End Architecture E-UTRAN EPC Application servers eNode MME MD B Service IP S Multi-standard X2 IP transport backbone User Database backbone eNode S1 B LTE S/P GWNetwork simplification EPC - Network Simplification C-plane U-plane C-plane U-plane  User Plane : 3 functional entities : eNode B, Serving Gateway and PDN S-GW Gateway (the gateways can be combined into a single physical entity) GGSN P-GW  GGSN  S/P-GW SGSN MME  Control plane :  SGSN  MME (Mobility Management Entity) RNC  RNC  eNode B NodeB eNode B
  • LTE Transforms Wireless Access and Core Networks to All-IP Voice SMS Circuit Switched 2G Core (Voice) Voice GSM ChannelsEDGE Packet Switched Email 3G Core VPNUMTS Internet 3G Separate Voice / IP Air Channels Separate CS / PS Core Networks UMTS Voice SMS Circuit Switched Core (Voice) 4G Email LTE Packet Switched Core VPNWIMAX Internet Voice SMS/MMS Video VoIP / IMS Telephony Enhanced IP Channel Packet Core (IP) Email Common Evolved (IP) Packet Core VPN Internet IP Video Common Packet (IP) Air Channel End-to-End IP Service Delivery 9 | Technical Sales Forum | May 2008
  • LTE Network Architecture (Non Roaming Case) GERAN SGSN HSS UTRAN S3 S6a S1-MME MME PCRF S4 Rx+ S11 S7 S10 “LTE-Uu” Serving S5 PDN SGiUE EUTRAN Operators IP Services ’ Gateway Gateway (e.g. IMS, PSS etc.) S1-U
  • LTE Network Architecture (Roaming Case Home RoutedTraffic)
  • DO-LTE Reference Architecture – Another look All interfaces are IP-based Source: TSG-X.P0057
  • DO-LTE Reference Architecture Gx (S7) H-PDN Home H-PCRF GW Agent HPLMN S2a S9 VPLMN (PMIPv6) V-PDN S8a/b GW Gx MIPv4 (MIPv6) (GTP or S5b PMIPv6) (PMIPv6) S2a V-PCRF Ty Legacy Serving Gxc Gxa PDSN GW S103 S11 HSGW* A10/A11+ A10/A11 S1u (GTP) MME HRPD S101 eRNC * Note: This network element was also known as ePDSN eNodeB MS eBTS Simple IP over HRPD and LTE + Enhanced 835 & MIPv4 (MIPv6) over TS 23.401/402 Standards HRPD
  • LTE Standard Reference Points (1 of 2) S1-MME: Reference point for the control plane protocol between E-UTRAN and MME. S1-U: Reference point between E-UTRAN and Serving GW for the per bearer user plane tunnelling and inter eNodeB path switching during handover. S2a: It provides the user plane with related control and mobility support between trusted non 3GPP IP access and the Gateway. S3: It enables user and bearer information exchange for inter 3GPP access network mobility in idle and/or active state. It is based on Gn reference point as defined between SGSNs. S4: It provides related control and mobility support between GPRS Core and the 3GPP Anchor function of Serving GW and is based on Gn reference point as defined between SGSN and GGSN. In addition, if Direct Tunnel is not established, it provides the user plane tunnelling. S5-PMIP: It provides user plane tunneling and tunnel management between Serving GW and PDN GW. It is used for Serving GW relocation due to UE mobility and in case the Serving GW needs to connect to a non collocated PDN GW for the required PDN connectivity. S6a: This interface is defined between MME and HSS for authentication and authorization. S6c: It is the reference point between PDN Gateway and 3GPP AAA server/proxy for mobility related authentication if needed. This reference point may also be used to retrieve and request storage of mobility parameters. This reference point may also be used to retrieve static QoS profile for a UE for non-3GPP access in case dynamic PCC is not supported.
  • LTE Standard Reference Points (2 of 2) S7: It provides transfer of (QoS) policy and charging rules from PCRF to Policy and Charging Enforcement Point (PCEF) ) in the PDN GW. S7a: It provides transfer of (QoS) policy information from PCRF to the Trusted Non-3GPP accesses. S7b: This interface is not specified within this release of the specification. S7c: It provides transfer of (QoS) policy information from PCRF to the Serving Gateway S8: It is the roaming interface in case of roaming with home routed traffic. It provides the user plane with related control between Gateways in the VPLMN and HPLMN. S9: It provides transfer of (QoS) policy and charging control information between the Home PCRF and the Visited PCRF in order to support local breakout function. In all other roaming scenarios, S9 has functionality to provide dynamic QoS control policies from the HPLMN. S10: This interface is reference point between MMEs for MME relocation and MME to MME information transfer. S11: This interface is reference point between MME and Serving GW. S103-U: This interface is the bearer interface between the EPC Serving Gateway and the HSGW, S101: This interface is the signaling interface between the EPC MME and the evolved HRPD Access Network (eAN/PCF). X2: This interface is for eNodeB to eNodeB handoff.
  • Evolved UTRAN ArchitectureKey elements of networkarchitecture MME/SGW MME/SGW No more RNC RNC layers/functionalitiesmoved to eNB EPC X2 interface for intra-eNBmobility (i.e. data/contextforwarding) S1 S1 S1 S1 S1eNB Functions RRM S1 Header compression & E-UTRANencryption of data streams UL/DL resource allocation Paging BCCH info over the air eNB X2 eNB MME selection during call X2 X2 Mobility control in eNBLTE_Active state
  • Many-to-Many Relation between MME/SGW & eNBsBenefits MME/SGW MME/SGW Network sharing Load balancing Network robustness EPC S1 S1 S1 S1 S1 S1 E-UTRAN eNB X2 eNB X2 X2 eNB X2
  • S1 Architecture MME/ MME/ MME/ MME/Key points SAEGW SAEGW SAEGW SAEGW S1 consists of S1-MME(control traffic) and S1-U S1(User Traffic) Flex Architecture for bothinterfaces S1-U and S1-MME eNB eNB eNB eNB Pool A Pool B 2 entities for control plane: eNB & MME (S1-MME interface) Overlapping region  eNB: UMTS NodeB plus UMTS RNC (RRC, Radio Bearer Management…)  MME: UMTS MM and SM functions 2 entities for user plane: eNB & SGW (S1-U interface)  eNB: UMTS NodeB plus UMTS RNC (PDCP/RLC/MAC…)  SGW: (Serving Gateway) UMTS packet core user plane
  • eNB, MME and SGW Pools •MME Pool •MME Pool A B MME MME MME MME MME MME MME •SGW Pool 1 •SGW Pool 2 SGW SGW SGW SGW SGW •eNB1 •eNB2 •eNB3 •eNB4 •eNB5 •eNB6 •eNB7 •eNB8 •eNB9 •Pool Area •Pool Area X Y
  • Functional Mapping (from TR 25.813)eN B LTE functions in eNode-B I n t e r C e ll R R M  Selection of MME at UE attachment  Routing towards SGW at UE initial access R B C o n tr o l  NAS messaging encapsulated by RRC for tx over radio  Scheduling and transmission of paging messages C o n n e c tio n M o .b ilit y C o n t  Scheduling and transmission of System Information R a d io A d m is s io n C o n t r o l  Dynamic allocation of resources to UEs in both UL and DL e N B M e a su re m e n t MME  Configuration and provision of eNB measurements C o n f ig u r& Pio on v is io n at r  Radio Bearer Control N A S S e c u r it y  Radio Admission Control D y n a m ic R e s o u r c e A llo c a t(S c h e d )u le r io n  Access restrictions in Active state I d le S t a t e M o b ilit y  Connection Mobility Control in LTE_ACTIVE state RRC H a n d lin g  Active mode Handover handling  RRC, header compression, encryption, RLC, MAC, PDCP S A E B e a r e r C o n t r o l PHY  Security of User plane and RRC R LC  Encryption of both in PDCP, integrity check of RRC M AC S e r v in g G a t e w a y  Scheduling and associated QoS handling S1 PHY M o b ilit y A n c h o r in g in t e r n e t
  • MME Functions NAS signalling NAS signalling security S101 – Interface between MME and eRNC for inter-RAT handoffs Inter CN node signalling for mobility between 3GPP access networks (terminating S3) UE Reachability in ECM-IDLE state (including control and execution of paging retransmission) Tracking Area list management PDN GW and Serving GW selection MME selection for handovers with MME change SGSN selection for handovers to 2G or 3G 3GPP access networks Roaming (S6a towards home HSS) Authentication Bearer management functions including dedicated bearer establishment. Lawful Interception of signalling traffic.
  • SGW Functions For each UE associated with the EPS, at a given point of time, there is a single Serving GW. The functions of the Serving GW, for both the GTP-based and the PMIP-based S5/S8, include:  the local Mobility Anchor point for inter-eNodeB handover;  assist the eNodeB reordering function during inter-eNodeB handover by sending one or more "end marker" packets to the source eNodeB immediately after switching the path.  Mobility anchoring for inter-3GPP mobility (terminating S4 and relaying the traffic between 2G/3G system and PDN GW);  ECM-IDLE mode downlink packet buffering and initiation of network triggered service request procedure;  Lawful Interception;  Packet routeing and forwarding;  Transport level packet marking in the uplink and the downlink, e.g. setting the DiffServ Code Point, based on the QCI of the associated EPS bearer;  Accounting on user and QCI granularity for inter-operator charging;  UL and DL charging per UE, PDN, and QCI (e.g. for roaming with home routed traffic)
  • PDN GW Functions If a UE is accessing multiple PDNs, there may be more than one PDN GW for that UE, however a mix of S5/S8 connectivity and Gn/Gp connectivity is not supported for that UE simultaneously. PDN GW functions include for both the GTP-based and the PMIP-based S5/S8:  Per-user based packet filtering (by e.g. deep packet inspection);  Lawful Interception;  UE IP address allocation;  Transport level packet marking in the uplink and downlink, e.g. setting the DiffServ Code Point, based on the QCI of the associated EPS bearer;  UL and DL service level charging as defined in TS 23.203 [6] (e.g. based on SDFs defined by the PCRF, or based on deep packet inspection defined by local policy);  UL and DL service level gating control as defined in TS 23.203 [6];  UL and DL service level rate enforcement as defined in TS 23.203 [6] (e.g. by rate policing/shaping per SDF);  UL and DL rate enforcement based on APN-AMBR (e.g. by rate policing/shaping per aggregate of traffic of all SDFs of the same APN that are associated with Non-GBR QCIs);  DL rate enforcement based on the accumulated MBRs of the aggregate of SDFs with the same GBR QCI(e.g. by rate policing/shaping);  DHCPv4 (server and client) and DHCPv6 (client, relay and server) functions;
  • UE PDN-GW User Plane Protocol Stack for PMIP basedS5/S8
  • Mobility Management Entity Interfaces S1-AP is the application protocol between eNodeB and MME SCTP is used to guarantee NAS delivery of signaling messages Non-Access Stratum Protocol between UE and MME supports UE mobility RRC and session management S11 interface between MME and SGW uses GTP-C for bearer set up PDCP25 | Technical Sales Forum | May 2008
  • SGW & PDN-GW Interfaces S5 interface uses GTP-C for bearer set up between SGW and PDN-GW Control plane protocol stack for PMIP based S5/S8 messages
  • HSGW Functions Terminates S103 from SGW PMIP Mobility Access Gateway (inter LTE-HRPD HO) Bearer binding/flow mapping Simple IP A10/A11+ ROHC Need to show HSGW to PDN- GW protocol stack
  • Future Tutorial Topics  S1-AP  Mobility management  Session Management  Paging Techniques  LTE-LTE Handoff  LTE-eHRPD Handoff  Authentication – AKA Procedure
  • Support Information
  • Glossary AAA – Authentication, Authorization, & HSS – Home Subscriber System Accounting IMS – IP Multi-media Subsystems AM – Access Manager LCP – Lucent Control Platform AN – Access Node LMA – Local Mobility Anchor AS – Application Server LTE – Long Term Evolution ASN-GW – Access Service Network GateWay MAG – Mobility Access Gateway AT – Access Terminal MIP – Mobile Internet Protocol ATCA – Advanced Telecommunications MME – Mobility Management Entity Computing Architecture PCRF – Policy Charging Rules Function BTS – Base Transceiver Station PDN GW– Packet Data Network GateWay (H=Home CMIP – Client MIP or V=Visited) DO – CDMA Data Only PDSN – Packet Data Serving Node ENodeB – LTE Base Station (or Cell) PMIP – Proxy MIP PPP – Point to Point Protocol EVDO – Evolution Data Only (CDMA) – see also HRPD ROHC – RObust Header Compression 4G – Fourth Generation SDM – Subscriber DB Manager GPRS – General Packet Radio Service SGW- Signaling GateWay GTP – GPRS Tunneling Protocol SRNC – Serving Radio Network Controller TAS – Telephony Application Server IPSec – IP Security tunnel protocol UMB – Ultra Mobile Broadband HA – Home Agent WiMAX – Worldwide Interoperability of Microwave HRPD – High Rate Packet Data Access HSPD – High Speed Packet Data
  • Specification completion LTE Milestone in 3GPP Standard EvolutionRel’99 Rel’4 Rel’5 Rel’6 Rel’7 Rel’8 3GPP ReleaseUMTS FDD Core Netw. Evolution HSDPA HSPA+ HSUPADCH up to2Mbps FDD Multimedia MBMS i.e. MIMO, CPC, DL 64- QAM, UL LTE repeaters sub-system 16-QAM 1.28Mcps TDD RAN#36 RAN#37 RAN#38 RAN#39 RAN#40 RAN#41 (Mar. (Sep. 07) (Dec. 07) (Mar. (Jun. 08) (Sep. 08) 07) 08)RAN1 65% 80% 95% CRs CRs CRsRAN2 20% 60–80% (no ASN.1) 80-95% CRs CRs CRsRAN3 20% 60-80% (no ASN.1) 80-95% CRs CRs CRsRAN4 40% 50-80% 70-95% CRs CRsRAN5 5% 40% 80%
  • Functional Mapping (from TR 25.813) MME FunctionseN B Idle mode mobility I n t e r C e ll R R M  Tracking area update R B C o n tr o l  Maintenance of equivalent tracking areas  Idle mode access restrictions C o n n e c tio n M o .b ilit y C o n t  Security Key management R a d io A d m is s io n C o n t r o l  S1-u connection establishment  Idle to active mode transition e N B M e a su re m e n t MME Session management C o n f ig u r& Pio on v is io n at r  RAB and QoS N A S S e c u r it y D y n a m ic R e s o u r c e S1 handling during HO A llo c a t(S c h e d )u le r io n I d le S t a t e M o b ilit y RRC H a n d lin g SAE GW radio related functionality  Idle S1 GTP bearer end point PDCP S A E B e a r e r C o n tr o l  QoS handling & tunnel mgt R LC  S1 path switch during Handover S e r v in g G a t e w a y M AC S1 PHY M o b ilit y A n c h o r in g in t e r n e t
  • RRM Functions (1/3)eN B Inter-Cell Interference Coordination I n t e r C e ll R R M (ICIC):  Managing the radio resources (notably the R B C o n tr o l radio resource blocks) such that inter-cell interference is kept under control C o n n e c tio n M o .b ilit y C o n t Load Balancing (LB): R a d io A d m is s io n C o n t r o l  Influence the traffic load distribution in such a manner that radio resources remain e N B M e a su re m e n t MME highly utilized and the QoS of in-progress C o n f ig u r& Pio on v is io n at r sessions are maintained to the possible N A S S e c u r it y extent (may result in handover decisions) D y n a m ic R e s o u r c e A llo c a t(S c h e d )u le r io n Inter-RAT Radio Resource Management: I d le S t a t e M o b ilit y  In connection with inter-RAT mobility RRC H a n d lin g (taking into account the involved RAT resource situation, UE capabilities & PDCP operator policies) S A E B e a r e r C o n tr o l R LC S e r v in g G a t e w a y M AC S1 PHY M o b ilit y A n c h o r in g in t e r n e t
  • RRM Functions (2/3)eN B Connection Mobility Control (CMC): I n t e r C e ll R R M  Management of radio resources in connection with idle or active mode R B C o n tr o l  Mobility of radio connections: handover decisions based on UE & e-NodeB measurements C o n n e c tio n M o .b ilit y C o n t + potentially: neighbour cell load, traffic distribution, transport & HW resources & operator defined policies R a d io A d m is s io n C o n t r o l Radio Bearer Control (RBC): e N B M e a su re m e n t MME  Establishment, maintenance & release of Radio C o n f ig u r& Pio on v is io n at r Bearers N A S S e c u r it y  Taking into account overall resource situation, D y n a m ic R e s o u r c e QoS requirements of in-progress sessions and of A llo c a t(S c h e d )u le r io n the new service) I d le S t a t e M o b ilit y RRC H a n d lin g Radio Admission Control (RAC):  Admit or reject the establishment requests for PDCP new radio bearers (taking into account overall S A E B e a r e r C o n tr o l resource situation, QoS requirements & priority levels) R LC S e r v in g G a t e w a y M AC S1 PHY M o b ilit y A n c h o r in g in t e r n e t
  • RRM Functions (2/3)eN B Packet Scheduling (PSC) I n t e r C e ll R R M  Allocate/De-allocate resources (including buffer, processing resources & resource R B C o n tr o l blocks) to UP & CP packets including:  Selection of RB, whose packets are to C o n n e c tio n M o .b ilit y C o n t be scheduled  Managing the necessary resources (e.g. R a d io A d m is s io n C o n t r o l power levels, specific resource blocks) e N B M e a su re m e n t MME C o n f ig u r& Pio on v is io n at r N A S S e c u r it y D y n a m ic R e s o u r c e A llo c a t(S c h e d )u le r io n I d le S t a t e M o b ilit y RRC H a n d lin g PDCP S A E B e a r e r C o n tr o l R LC S e r v in g G a t e w a y M AC S1 PHY M o b ilit y A n c h o r in g in t e r n e t
  • LTE-HRPD Interworking 3GPP Standards – Stage 2 TR36.300 defines LTE Radio Access  RAN3 defined the ASN1 (coding) of the S1-AP interface to Packet Core 3GPP Evolved Packet Core (EPC) Architecture  TS 23.401 Specifies MME, SGW, PDN GW  S1-U GTP (eNodeB to SGW bearer)  S1-MME GTP (eNodeB to MME control)  S10 GTP (MME to MME control)  S11 GTP (MME to SGW),  S5a GTP (SGW to Visited PDN-GW),  S8a GTP (SGW to Home PDN-GW),  Gx (S7) Diameter (Home PDN-GW to Home PCRF),  Gxc (S7c) Diameter (SGW to Visited PCRF)  S6a Diameter (MME to HSS)  TS 23.402 EPC Enhancements for non 3GPP networks deploying LTE RAN.  S101 UDP/IP (MME to DO RAN),  S5b PMIPv6 (SGW to VPDN-GW)  S8b PMIPv6 (SGW to Home PDN-GW)  S103 GRE (SGW to HSGW)  S102 A21-like UDP/IP (MME to 3G1x MSC)  3GPP TS 36.300 “Evolved Universal Terrestrial Radio Access Network (E-UTRAN)”  Defines the E-UTRAN Overall Description  Defines X2 – eNodeB to eNodeB Handoff
  • Relevant 3GPP Release 8 Stage 3 SpecificationsReference Spec Point Endpoints Usage Protocol WG Reference S1-MME E-UTRAN - MME Session management, mobility management EMM, ESM CT1 24.301 S1-U E-UTRAN - MME User plane tunneling GTP-U CT4, RAN3 29.274 S2a MAG - PDN GW Control and user plane from trusted non-3GPP to PDN GW PMIP CT4 29.275 S2b ePDG - PDN GW Control and user plane from ePDG to PDN GW PMIP CT4 29.275 User plane tunneling and tunnel management between S-GW and S5 (PMIP) S-GW - PDN GW PMIP CT4 29.275 PDN GW. Serving GW relocation S6a MME - HSS Authentication and authorization Diameter CT4 29.272 Authentication, retrieval of mobility parameters (and static QoS S6b PDN GW - 3GPP profile for non-3GPP access if PCC is not used) from 3GPP AAA Diameter CT4 29.273 AAA server or proxy to PDN GW. Authentication and mobility parameters from 3GPP AAA proxy to S- S6c Diameter CT4 29.273 S-GW - 3GPP AAA GW QoS policy and charging rules from PCRF to policy and charging Gx Diameter CT3 29.212 PCRF - PDN GW enforcement point in PDN GW. Based on Gx Trusted non-3GPP- Gxa QoS policy information from PCRF to trusted non-3GPP access Diameter CT3 29.212 PCRF Gxc PCRF - S-GW QoS policy information from PCRF to S-GW Diameter CT3 29.212 Inter-PLMN reference point for control and user plane between S- S8 (GTP) S-GW - PDN GW GW and PDN GW. Inter-PLMN variant of S5, based on Gp. GTP CT4 29.274 Inter-PLMN roaming interface for control and user plane between S8 (PMIP) S-GW - PDN GW PMIP CT4 29.275 S-GW and PDN GW for home routed traffic case QoS policy and charging information from Home PCRF to visited S9 H-PCRF - S-PCRF Diameter CT3 29.125 PCRF S10 MME-MME Reference point between two MMEs for MME relocation GTP CT4 29.274 S11 MME - S-GW Bearer control between MME and S-GW GTP CT4 29.274 Optional reference point for user plane tunneling in direct tunnel S12 UTRAN - S-GW mode is based on Iu-u GTP-U CT4 29.274 SGi PDN GW - PDN Breakout from the PDN GW to packet data network Diameter, Radius CT3 29.061
  • Relevant 3GPP Release 8 Stage 3 SpecificationsReference Spec Point Endpoints Usage Protocol WG Reference Rx PDN GW - PCRF Policy and charging information to operators IP services Diameter CT3 29.214 S14 UE - ANDSF Dynamic provision of network selection information to UE Not defined yet CT1 24,302 ANDSF - Non- Dynamic exchange of information between ANDSF and non-3GPP S15 3GPP access IP access network Not defined yet Trusted non-3GPP - AAA information and mobility and charging information from 3GPP Sta Diameter CT4 29.273 PCRF server or proxy to trusted non-3GPP access Swa untrusted non- AAA information and mobility information from 3GPP server or Diameter CT4 29.273 3GPP - 3GPP AAA proxy to an untrusted non-3GPP access 3GPP AAA proxy - SWd Diameter CT4 29.273 3GPP AAA server Links the AAA proxy to the AAA server via intermediate networks AAA information and mobility parameters from 3GPP AAA proxy or SWm 3GPP AAA - ePDG Diameter CT4 29.273 server to ePDG Untrusted non- SWn PMIP CT4 29.275 3GPP - ePDG Forces the tunneled traffic from the UE towards ePDG UE initiated establishment and tear down of IPSec tunnel. Fast update of IPSec tunnels during handover between two untrusted Swu UE - ePDG non-3GPP accesses IKEv2, MOBIKE CT1 24,302 UE - Access authentication (mandatory for trusted, optional for N.N. trusted/untrusted EAP AKA CT1 24.302 untrusted access) non-3GPP access 3GPP AAA Server - SWx Authentication data from the HSS to 3GPP AAA server Diameter CT4 29.273 HSS Optimized Handover Procedures and Protocols between EUTRAN S101 MME-HRPD AN CT4 29.277 Access and cdma2000 HRPD Access cdma2000 HRPD Optimized Handover Procedures and Protocols between EUTRAN S102 CT4 29.276 access Access and 1xRTT Access cdma2000 1xRTT Optimized Handover Procedures and Protocols between EUTRAN S103 CT4 29.277 access Access and cdma2000 HRPD Access USIM/ME USIM - UE USIM interface T=0 CT6 31.102, 31.111
  • Relevant 3GPP Release 8 Stage 3 SpecificationsReference Spec Point Endpoints Usage Protocol WG Reference Cx HSS – CSCF Location management, user data handling, user authentication Diameter CT4 29.228, 29.229 Dx I-SCSCF – SLF Subscription Locator Query, used in conjunction with Cx interface Diameter CT4 29.228, 29.229 Gm UE – P-CSCF Multi-media type services SIP CT1 24.229 ISC S-CSCF – AS Subscription to event notification, convey charging info SIP CT1 24.229 Mw CSCF – CSCF Call Control Protocol for use in IP Multimedia CN subsystem SIP, SDP CT1 24.229 Mg CSCF – MGCF Call Control Protocol for use in IP Multimedia CN subsystem SIP, SDP CT1 24.229 Mr S-CSCF – MRFC Call Control Protocol for use in IP Multimedia CN subsystem SIP, SDP CT1 24.229 Mi Call Control Protocol for use in IP Multimedia CN subsystem SIP, SDP CT1 24.229 CSCF – BGCF Mj BGCF – MGCF Call Control Protocol for use in IP Multimedia CN subsystem SIP, SDP CT1 24.229 Mx CSCF – IBCF Call Control Protocol for use in IP Multimedia CN subsystem SIP, SDP CT1 24.229 Mk BGCF – BGCF Call Control Protocol for use in IP Multimedia CN subsystem SIP, SDP CT1 24.229 Mm CSCF – Ext. IMS Call Control Protocol for use in IP Multimedia CN subsystem SIP, SDP CT1 24.229 Mn MGCF– IMS-MGW Support for PSTN/ISDN emulation as required by ETSI TISPAN H.248 CT4 29.332 Mp MRFC – MRFP Allows MRFC control of media resources provided by MRFP H.248 CT4 29.333 Presence Manage presence information of a user device, service or Various SIP, XCAP CT1 24.141 Ref Points service media Rf AS – CDF Offline Charging reference point Diameter SA5 32.260, 32.299 Ro AS/MRFC – OCS Online Charging reference point Diameter SA5 32.260, 32.299 Sh AS – HSS Data handling, Subscription Notification Diameter CT4 29.328, 29.329 Dh AS – SLF Subscription Locator Query, used in conjunction with Sh interface Diameter CT4 29.328, 29.329 Ut UE – AS Service Configuration Data Manipulation for Supplementary Services XCAP, HTTP CT4 24.423
  • NAS sub-layer performs:  AuthenticationLTE ARCHITECTURE – Control Plane Layout over S1  Security control  Idle mode mobility handling  Idle mode paging origination UE eNB MME NAS NAS RRC sub-layer performs: RRC RRC  Broadcasting  Paging  Connection Mgt PDCP PDCP  Radio bearer control  Mobility functions  UE measurement reporting & control RLC PDCP sub-layer performs: RLC  Integrity protection & ciphering MAC MAC PHY PHY UE eNode-B MME
  • LTE ARCHITECTURE – Control Plane Layout over S1 UE eNB MME NAS NAS RRC RRC PDCP PDCP RLC RLC MAC MAC PHY PHY UE eNode-B MME
  • LTE ARCHITECTURE – User Plane Layout over S1 UE eNB SAE Gateway PDCP PDCP RLC RLC MAC MAC PHY PHY UE eNode-B SAE
  • LTE ARCHITECTURE – User Plane Layout over S1Physical sub-layer performs: PDCP sub-layer performs: DL: ODFMA, UL: SC-FDMA  Header compression HARQ  Ciphering UL power control Multi-stream transmission & reception (i.e. MIMO) UE eNB SAE Gateway RLC sub-layer performs: PDCP PDCP  Transferring upper layer PDUs  In-sequence delivery of PDUs  No error correction through ARQ  Duplicate detection RLC RLC  Flow control  Concatenation/re-assembly of packets MAC sub-layer performs: MAC MAC  Scheduling  Error correction through HARQ  Priority handling across UEs & logical PHY PHY channels  In-sequence delivery of RLC PDUs  Multiplexing/de-multiplexing of RLC radio bearers into/from PhCHs on TrCHs UE eNode-B MME
  • LTE-HRPD Interworking 3GPP Standards – Stage 2 (continued) Three 3GPP2 LTE-HRPD standards documents…  3GPP2 TSG-C C.S0087-0 Inter-working Specification for cdma2000 1x, High Rate Packet Data and Long Term Evolution Systems – eAT new ProtocolIDs and new tunneling-related protocols  TSG-A A.S0022-0 “E-UTRAN-HRPD Connectivity/Interworking: Core Network Aspects”: Based on the existing HRPD IOS specification to support: – A11+ UDP/IP (DO RAN to HSGW) – S101 UDP/IP (DO RAN to MME)  TSG-X.0057 “E-UTRAN-HRPD Connectivity/Interworking: Core Network Aspects” – Defines E-TRAN-eHRPD connectivity and Interworking Architecture – Define HSGW functions and interfaces – S2a PMIP v6 (HSGW to PDN-GW) – Gxa (S7a) Diameter (HSGW to PCRF) – S101 UDP/IP (DO RAN to MME) – S103 GRE (SGW to HSGW)