3GPP LTE & 3GPP2 LTE STANDARDIZATION
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1 3GPP LTE & 3GPP2 LTE STANDARDIZATION KRnet 2006, June 27-28, 2006 Dr. LEE, HyeonWoo SAMSUNG ELECTRONICS 1
2 CONTENTS KRnet /26 Mobile Communication Roadmap 3GPP Long Term Evolution 3GPP2 Long Term Evolution IMT-Advanced
3 Mobile Communication Roadmap KRnet /26 Mobility Time High Middle 1G AMPS TACS GSM cdmaone 2G 3G WCDMA cdma2000 HSPA 1xEV-DO 3G+ Deployment of LTE LTE E3G BWA IMT-Advanced 4G /WiMAX Low WLAN /WiFi Data rate <10kbps <200kbps 300kbps-10Mbps <100Mbps 100M-1Gbps
4 View toward 4G/IMT-Adv High Mobility DMB B3G Mobile 2G GSM IS-95 IS-136 3G GPRS CDMA1x WCDMA EV-DO HSDPA 4G Evolution Revolution Nomadic IEEE IEEE Bluetooth Wi-Fi Wi-Max W-PAN UWB WiBro IEEE802.16e Evolution Low Mobility Time KRnet /26
5 KRnet /26 3GPP Roadmap UTRA-UTRAN Long Term Evolution Study Item (TSG-RAN): Air Interface System Architecture Evolution Study Item (TSG-SA): Network Architecture Standard Release 99/4 IMS HSDPA WLAN I/W PoC MBMS EDCH UTRAN Long-Term Evolution (LTE) Workshop ( ) Release 5 Release 6 Release 7 LTE & SAE specifications - Improved packet service - Improved coverage - Reduced latency Commercial Release 99/4 system Release 5/6 system Evolution system
6 3GPP Long Term Evolution (LTE) and System Architecture Evolution (SAE) KRnet /26 Evolution target Max. data rate: 100 Mbps (downlink), 50 Mbps 20 MHz Improved system throughput Reduced user plane latency: less than 5ms (btw RAN edge and Mobile) Reduced control plane latency: less than 100ms (from IDLE to ACTIVE state) Support of scalable system bandwidth: 1.25/1.6/2.5/5/10/15/20 MHz LTE/SAE Schedule Study Item Work Item Requirement Decision RAN Architecture, Multiple access scheme Decision Study Item TR Approval Stage 2 Completion: LTE RAN-CN functional split Decision Channel Structure, Mobility details Decision Study Item TR Approval Stage 2 Completion: SAE 6 Feasibility Study: LTE Feasibility Study: SAE Core Specification
7 3GPP LTE/SAE related working group KRnet /26 TSG RAN WG and TSG SA WG2 are the main groups. PCG RAN: Radio Access Network SA: Service & Architecture CT: Core Network and Terminal GERAN: GSM&EDGE RAN TSG RAN TSG SA TSG CT TSG GERAN RAN WG1 Physical SA WG1 Service & Req. CT WG1 NAS GERAN WG1 RAN WG2 Layer 2/3 SA WG2 Architecture CT WG2 GERAN WG2 RAN WG3 Iu Interface SA WG3 Security CT WG3 GERAN WG3 RAN WG4 Performance SA WG4 Codec CT WG4 Gn Interface RAN WG5 Test () SA WG5 I/W CT WG5
8 LTE general KRnet /26 LTE focus is on Enhancement of the Universal Terrestrial Radio Access (UTRA) Optimisation of the UTRAN architecture LTE Background Expectations of additional 3G spectrum allocations Demand for higher data rates Greater flexibility in frequency allocations Continued cost reduction LTE LTE Targets Significantly increased peak data rates Increased cell edge bit rates Improved spectrum efficiency Improved latency Scaleable bandwidth Reduced CAPEX and OPEX Acceptable system and terminal complexity, cost and power consumption Compatibility with earlier releases and with other systems Optimised for low mobile speed but also supporting high mobile speed
9 LTE current working assumption KRnet /26 Downlink based on OFDMA OFDMA offers improved spectral efficiency, capacity, etc Uplink based on SC-FDMA (single carrier) SC-FDMA is technically similar to OFDMA but is better suited for uplink from hand-held devices - (more considerations on battery power) For both FDD and TDD modes Macro-diversity (soft handover) is not used.
10 LTE performance (1/2) KRnet /26 Downlink Rel 6 (HSDPA) LTE LTE target / Fulfillment Peak bitrate (Mbps) Mbits target / Fulfilled Spectral efficiency (bps/hz/s) Cell edge user throughput (bps/hz/s) times of HSDPA / times of HSDPA / 2.5 Uplink Rel 6 (HSUPA) LTE LTE target / Fulfillment Peak bitrate (Mbps) Mbits target / Fulfilled Spectral efficiency (bps/hz/s) Cell edge user throughput (bps/hz/s) times of HSUPA / times of HSUPA / 2.5
11 KRnet /26 LTE performance (2/2) Latency Control-plane - Significant reductions in transition times (~100ms) from idle or dormant states to active state Active (Cell_DCH) Less than 50msec Dormant (Cell_PCH) Camped-state (idle) Less than 100msec User-plane - Radio access network latency below less than 5 ms in unloaded condition (i.e. single user with single data stream) for small IP packet. UE e-node B agw IP Network Latency : ~5ms
12 KRnet /26 Major decisions made in RAN WGs OFDMA for downlink SC-FDMA for uplink 0.5ms TTI 375 KHz resource block IP Network S1 - flex 2 node architecture (agw & enb) Data Forwarding Functions in enb: ARQ Functions in agw: Header compression / Ciphering
13 KRnet /26 SAE (System Architecture Evolution) Objectives New core network architecture to support the highthoughput/low latency LTE access system. - Symplified network architecture All IP network - All services are via PS domain only, No CS domain Support mobility between multiple heterogeneous access system - 2G/3G, LTE, non 3GPP access systems (e.g. WLAN, WiMAX)
14 Baseline of SAE architecture GERAN Gb Iu SGSN GPRS Core PCRF UTRAN S7 Rx+ S3 S4 Evolved RAN S1 MME UPE S5a 3GPP Anchor S5b IASA SAE Anchor Evolved Packet Core HSS S6 SGi Op. IP Serv. (IMS, PSS, etc ) S2 non 3GPP IP Access S2 WLAN 3GPP IP Access * Color coding: red indicates new functional element / interface MME Mobility Management Entity UPE User Plane Entity 3GPP Anchor Mobility anchor between 2G/3G and LTE access systems (based on GTP) SAE Anchor Mobility anchor between 3GPP access systems (2G/3G/LTE) and From TR non-3gpp access systems (e.g. WLAN, WiMAX) KRnet /26
15 KRnet /26 LTE/SAE Technical Reports (for info.) SAE SA WG1 TS22.xxx V0.0.0 Requirements for evolution of the 3GPP system architecture (S ) Editor: T-mobile SA WG2 TR V1.1.0 System Architecture Evolution (SP ) Editor: Vodafone LTE TR V7.3.0: Requirements for EUTRA and UTRAN TR V0.1.3: Feasibility Study for EUTRA and EUTRAN Outcome RAN WG1 RAN WG2 RAN WG3 RAN WG4 TR V1.2.3 Physical layer aspects for EUTRA (RP ) Editor: NTT DoCoMo TR V0.8.4 EUTRA and EUTRAN Radio interface protocol aspects (RP ) Editor: Nokia, LG, NEC, Motorola, Samsung TR R3.018 V0.4.0 EUTRA and EUTRAN Radio Access Architecture and Interfaces Editor: Vodafone SI TR: NTT DoCoMo Base Station: Ericsson Terminal: Motorola RRM: Nokia RF System Scenarios: Siemens WG specific TRs
16 KRnet /26 IMS is Access Independent (in Theory) 3GPP Defined Radio Accesses For Packet HSPA TD- SCDMA WCDMA HSPA+ EDGE LTE GPRS IMS 3GPP2 MDN e 802.x Cable DSL Non-3GPP Defined Radio Accesses Fixed Accesses
17 Organizations using IMS KRnet /26 CSI VCC Presence GLMS PoC Messaging Multimedia Telephony Multimedia Telephony Multimedia Telephony Cellular Access to IMS IP Wireline Access to IMS WLAN Access to IMS Mobile Residential
18 On going Work for CS to IMS Transition KRnet /26 Objective: Migration from CS voice services to PS IMS multimedia services CSI (Combinational Services) Complement CS services with IMS services VCC (Voice Call Continuity) Voice handovers between IMS and CS bearers Multimedia Service Definition Robust interoperable multimedia telephony Improving IMS quality Faster session setup, improved performance, better voice quality
19 KRnet /26 3GPP2 Phase 2 (LTE) Timeline Phase 2 (Rev.C) FDD Schedule Frame Selectio n Baseline Publicatio n June Octobe r Decemb er 2007 TDD Submit Joint Framewor k Approval process as Framework Baseline Publication - Both FDD and TDD pursue same publication date
20 Framework proposals for 3GPP2 Phase 2 1. Lucent-Nortel-Samsung Proposal 2. Qualcomm Proposal 3. Motorola Proposal 4. HRZC(Huawei, RITT, ZTE, China Unicom) Joint Proposal 5. LG Proposal Characteristics Pros & Cons Strictly Backward Compatible (SBC) Loosely Backward Compatible (LBC) Co-existing Legacy AT and new AT FL: OFDMA and CDMA multiplexed in time slot RL: CDMA or Hybrid OFDM-CDMA Legacy AT and new AT in separate carrier Maximize reuse of existing upper layer FL: OFDM / RL: OFDM-CDMA - Smooth Migration from legacy system - Performance loss due to backward compatibility - Optimized for broadband system -Minimum backward compatibility KRnet /26
21 LNS vs. HRZC Framework comparison Item LNS (Lucent-Nortel-Samsung) HRZC (Huawei-RITT-ZTE-China Unicom) Remarks Multiple Access OFDMA (with Precoded CDMA) OFDMA Key issue Supportable Bandwidth 1.25, 2.5, 5, 10, 20 MHz 1.25, 2.5, 5, 10, 20 MHz Resource Allocation Unit DRCH/LRCH And Multiplexing DRCH/LRCH And Multiplexing Key issue Data Control Channel (MAP) Grouped Unicast HARQ FL: Synch HARQ RL: Synch HARQ FL: Asynch HARQ RL: Synch HARQ Coding Turbo Coding Turbo Coding Open Loop: STBC, Cyclic shift Diversity Open Loop: STBC, open loop SDMA MIMO Closed Loop: SCW/MCW/Beam forming Closed Loop: SCW/MCW/Beam forming Feedback: Code book index Feedback: Precoder vector/matrix Power Control Yes Yes Resource Management Support persistent assignment Support persistent assignment KRnet /26
22 KRnet /26 Migration from 3G LTE to 4G (IMT-Adv.) Mid-term 3G RAN evolution: HSDPA, uplink enhancement, MBMS, etc. Evolved UTRA and UTRAN (Super 3G) Super 3G system will provide support for full IP capabilities Smooth introduction of future 4G system Now 3G 3G Long-term evolution 3G Super 3G 3G Super 3G 4G Super 3G 4G Source: DoCoMo
23 3G Evol vs. IMT-Adv KRnet /26 3G RAN Evolution Enhanced IMT-2000 Existing 3G Spectrum and additional band (e.g 2.6 GHz) 14Mbps Mbps up to approximately 30 Mbit/s by around the year 2005 ITU-R M.1645 Mid-term Evolution HSDPA, HSUPA, etc. Long-term Evolution Competitive technology even in 4G era ITU-R M.1645 SPECTRUM Launch BIT RATE 3G Evolution Mid-term Evolution IMT-Adv New Mobile Access New Spectrum for 4G with Broader band e.g. 100MHz (to be identified) 100Mbps-1Gbps Long-term Evolution Source: DoCoMo 2G 1G 1980s 1990s 2000s 2010s 2020s 4G
24 Network configuration in IMT-Adv. era KRnet /26 Application Server Soft Switch All IP N/W OPEN API Access Gateway Wireline Mobile Nomadic Hot Spot Sensor N/W Ad-hoc N/W 3G/ WiBro/4G MANet WLAN/ Wi-MAX
25 KRnet /26 Strategy toward Global 4G Standard Korea: TTA, Asia : CJK/APT, Global: WWRF, OMA/IEEE, ITU National Regional Global 단일표준추진 NGMC TTA CJK IT mtg. APT/AWF ITU-R/T ARIB-mITF CCSA-Future WWRF OMA Strategic Alliance Win-Win
26 Closing Remarks KRnet /26 3G LTE is one of strong migration paths toward IMT-Adv. Smooth migration from 3G LTE and IMT-Adv. Is key for success in market However, other migration paths are also important for consideration. We will continue to lead technology and standardization in 3G LTE and IMT-Adv.
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