1 / 47

LTE beyond 3.5G

LTE beyond 3.5G. February 2010 Presentation for Departemen Elektro FTUI Ir. Dwika Sudrajat CTO and Managing Consultant dwika@m5sinergi.com HP: 08161108571. Outline. HSPA+: Next step in 3GPP Migration Path 3GPP Long Term Evolution (LTE) LTE Peak User Performance & Mobile WiMAX Rel 1.5

johnavon-gavin
Download Presentation

LTE beyond 3.5G

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LTE beyond 3.5G February 2010 Presentation for Departemen Elektro FTUI Ir. Dwika Sudrajat CTO and Managing Consultant dwika@m5sinergi.com HP: 08161108571

  2. Outline • HSPA+: Next step in 3GPP Migration Path • 3GPP Long Term Evolution (LTE) • LTE Peak User Performance & Mobile WiMAX Rel 1.5 • Timeline Comparison • Migration Path Options for Today’s Mobile Operators • Summary and Conclusion

  3. “Multi-carrier”: FDM and OFDM Ch.1 Ch.2 Ch.3 Ch.4 Ch.5 Ch.6 Ch.7 Ch.8 Ch.9 Ch.10 Conventional multicarrier techniques frequency Ch.2 Ch.4 Ch.6 Ch.8 Ch.10 Ch.1 Ch.3 Ch.5 Ch.7 Ch.9 Saving of bandwidth 50% bandwidth saving Orthogonal multicarrier techniques frequency

  4. Key Technology Of LTE • OFDM & OFDMA • OFDMA (Orthogonal Frequency Division Multiple Access ) • Delivers higher peak data rates and increased system capacity • Services : • Video streaming • High-speed 3D and multiplayer games • Music downloads or high-speed data connectivity. • Smart Antenna • MIMO (multiple input / multiple output ) • Increases subscriber data rate • AAS (adaptive antenna system ) • Improves cell-edge link budget

  5. LTE OFDM & OFDMA OFDM All carriers are transmitted in parallel Only one user is supported at the same time OFDMA Divides the carrier space into many groups Many users can be supported at the same time

  6. Combining TDMA and FDMA • TDMA/FDMA operation = OFDMA • Frequency sub-channels are composed of multiple, non-adjacent carriers

  7. OFDMA for Mobile • Compatible to channel dynamics in high mobility environment • Demonstrated in HW and Simulations • Demonstrate feasibility of high data rates within a limited spectrum • Optimization of OFDMA, and MIMO-OFDMA modulation schemes: Adaptive bit-loading, inter/intra band coding, utilization of side information

  8. Crowded Spectrum: FCC Chart http://www.ntia.doc.gov/osmhome/allochrt.pdf

  9. Radio/TV/Wireless Allocations: 30 MHz-30 GHz

  10. PSDN BSC BTS BSC HLR SMS-SC BSC PLMN MSC/VLR MSC/VLR BSC GMSC PSTN Tandem Tandem CO CO CO Typical 2G Architecture BTS — Base Transceiver Station BSC — Base Station Controller MSC — Mobile Switching Center VLR — Visitor Location Register HLR — Home Location Register

  11. Signalingover SS7 Where is the subscriber? MAP/ IS41 (over TCAP) ISUP 2 4 3 Provide Roaming 5 Routing Info 1 6 IAM IAM 514 581 ... PSTN-to-Mobile Call PLMN PLMN PSTN (Visitor) (Home) (SCP) HLR SCP (STP) VMSC GMSC MS BSS (SSP) (SSP) (STP) (SSP) VLR

  12. NSS BSS E PSTN PSTN Abis Gb Gn Gc Gr Gi B D A C H BSC MS MSC GMSC BTS VLR Gs SS7 2G+ MS (voice & data) HLR AuC PSDN IP SGSN GGSN 2.5G Architectural Detail 2G MS (voice only) BSS — Base Station System BTS — Base Transceiver Station BSC — Base Station Controller NSS — Network Sub-System MSC — Mobile-service Switching Controller VLR — Visitor Location Register HLR — Home Location Register AuC — Authentication Server GMSC — Gateway MSC SGSN — Serving GPRS Support Node GGSN — Gateway GPRS Support Node GPRS — General Packet Radio Service

  13. H Abis Iub Gn Gc Gr Gi B D C IuCS RNS ATM IuPS RNC Node B 3G UE (voice & data) 3G rel99 Architecture (UMTS) —3G Radios 2G MS (voice only) CN BSS E PSTN PSTN A BSC MSC GMSC Gb BTS VLR Gs SS7 2G+ MS (voice & data) HLR AuC PSDN IP SGSN GGSN BSS — Base Station System BTS — Base Transceiver Station BSC — Base Station Controller RNS — Radio Network System RNC — Radio Network Controller CN — Core Network MSC — Mobile-service Switching Controller VLR — Visitor Location Register HLR — Home Location Register AuC — Authentication Server GMSC — Gateway MSC SGSN — Serving GPRS Support Node GGSN — Gateway GPRS Support Node UMTS — Universal Mobile Telecommunication System

  14. 2G MS (voice only) CN CS-MGW Nb BSS CS-MGW A PSTN Nc PSTN Abis Iub Gn Gc Gr Gi B H D C Mc Mc BSC MSC Server GMSC server Gb BTS VLR Gs SS7 2G+ MS (voice & data) IuCS RNS IP/ATM HLR AuC ATM IuPS PSDN RNC SGSN GGSN Node B 3G UE (voice & data) BSS — Base Station System BTS — Base Transceiver Station BSC — Base Station Controller RNS — Radio Network System RNC — Radio Network Controller CN — Core Network MSC — Mobile-service Switching Controller VLR — Visitor Location Register HLR — Home Location Register AuC — Authentication Server GMSC — Gateway MSC SGSN — Serving GPRS Support Node GGSN — Gateway GPRS Support Node 3G rel4 Architecture (UMTS) —Soft Switching

  15. 2G MS (voice only) CN CS-MGW Nb BSS CS-MGW A/IuCS PSTN Nc PSTN Gr Abis Iub Mg Gn Gc Gi C D B H Mc Mc Mc BSC MSC Server GMSC server Gb/IuPS BTS VLR Gs SS7 2G+ MS (voice & data) ATM IuCS RNS IP/ATM HSS AuC IuPS IP Network RNC SGSN GGSN Node B 3G UE (voice & data) IM-MGW IM Gs PSTN IM — IP Multimedia sub-system MRF — Media Resource Function CSCF — Call State Control Function MGCF — Media Gateway Control Function (Mc=H248,Mg=SIP) IM-MGW — IP Multimedia-MGW IP MRF MGCF CSCF 3G rel5 Architecture (UMTS) —IP Multimedia

  16. 3GPP LTE and SAE • SAE architecture MME – Mobility Management Entity UPE – User Plane Entity AS – Access System Red indicates new functional element / interface

  17. 3GPP LTE and SAE • Status of the work for LTE • Downlink Parameter for OFDM

  18. 3GPP LTE and SAE • Uplink Parameters (Variant including TD SCDMA framing also supported)

  19. SC-FDMA (1) • Low PAPR • Cyclic prefix guard interval: enable cost-effective frequency domain block processing at receiver side • Two types of SC transmission • Localized transmission: multi-user scheduling gain in frequency domain • Distributed transmission: robust transmission for control channels and high mobility UE

  20. SC-FDMA (2) • Localized transmission • Need to feedback channel state information • Mainly for low-to-medium mobility users • Distributed transmission • Mainly for high mobility users • Orthogonal resource subspace division • Transmission bandwidth is divided into localized band and distributed band • Each band is further divided into several subbands for inter-cell interference avoidance/concentration • A subband out of each band in a cell is operated in whispering mode; UEs using a channel belonging to the same subband in neighboring cells can be operated in speaking mode

  21. SC-FDMA Parameters

  22. Signal is “broadband” 2 Channels Frequency 8 Channels Frequency Channels are “narrowband” (flat fading, ↓ ISI) OFDM: Parallel Tx on Narrow Bands Channel transfer function (Freq selective fading) Channel impulse response Frequency Time 1 Channel (serial) Frequency

  23. MIMO: Spatial Diversity, Spatial Multiplexing w/ Multiple Antennas Example: Simple Selection Diversity (Rx only), Diversity Gains..

  24. SISO, MISO, SIMO, MIMO, SDMA… SISO • Single Input, Single Output MISO • Multiple Input, Single Output SIMO • Single Input, Multiple Output MIMO • Multiple Input, Multiple Output SDMA

  25. Adaptive Antenna Gains (Tx or Rx) Diversity • differently fading paths • fading margin reduction • no gain when noise-limited Coherent Gain • energy focusing • improved link budget • reduced radiation Interference Mitigation • energy reduction • enhanced capacity • improved link budget Enhanced Rate/Throughput • co-channel streams • increased capacity • increased data rate

  26. Frequency f 0 C B A C B A C B A C B A A Time B C TDMA Overview

  27. Channel PartitioningMAC protocols. Issues TDMA: time division multiple access • Access to channel in "rounds" • Each station gets fixed length slot (length = pkt trans time) in each round • Unused slots go idle • Example: 6-station LAN, 1,3,4 have pkt, slots 2,5,6 idle • Does not leverage statistical multiplexing gains here

  28. Frequency C C f 2 B B f 1 A A f 0 Time FDMA Overview Need substantial guard bands: inefficient

  29. Radio Spectrum Base-band Spectrum B Code A B Frequency Code A Code B A C C B C B B A B A A C A A B Time CDMA spread spectrum Sender Receiver

  30. Summary of Multiple Access FDMA power TDMA frequency time power CDMA frequency time power frequency time

  31. OFDMA OFDMA: a mix of FDMA/TDMA: (OFDM modulation) Sub Channels are allocated in the Frequency Domain, OFDM Symbols allocated in the Time Domain. Dynamic scheduling leverages statistical multiplexing gains, and allows adaptive modulation/coding/power control, user diversity

  32. 3GPP Long Term Evolution (LTE) • 3GPP (LTE) is Adopting: • OFDMA in DL with 64QAM • All IP e2e Network • Channel BWs up to 20 MHz • Both TDD and FDD profiles • Flexible Access Network • Advanced Antenna Technologies • UL: Single-Carrier FDMA (SC-FDMA), (64QAM optional) • LTE is adopting technology & features already available with Mobile WiMAX • Can expect similar long-term performance benefits and trade-offs

  33. LTE: Not a Simple 3G Upgrade • LTE Represents a Major Upgrade from CDMA-Based HSPA (or EV-DO) • No longer a “simple” SW upgrade: • CDMA to OFDMA, represent different technologies • Circuit switched to IP e2e network • Also requires new spectrum to take full advantage of wider channel BWs and … • Requires dual-mode user devices for seamless internetwork connectivity

  34. LTE Projections & Mobile WiMAXFDD 2 x 20 MHz Channel BW 1. Motorola website, “LTE In Depth” , Reference does not show UL peak rate projections2. “Trials–Ensuring Success for Innovation”, Joachim Horn, T-Mobile, NGMN Conference presentation, June 25-27,20083. “3GPP Long-Term Evolution (LTE)”, Qualcomm, January 20084. 64QAM is optional for UL in LTE specification, 16QAM is mandatory

  35. Other Key Parameter Comparisons 1. Spectral efficiency is based on NGMN Alliance recommended evaluation methodology 2. Reference for LTE Spectral Efficiency: Motorola website, “LTE in Depth”.

  36. What is MIMO? Multiple Input Multiple Output Down link Up link 4x2 STTD Code Rate = 2 UL Adaptive MIMO 4x1 STTD Code Rate = 1 UL virtual MIMO 4x4 Spatial Multiplexing Code Rate = 4 MIMO Increases throughput

  37. MIMO Channels (Rich-Scattering Channels)

  38. 3GPP IMT-Advanced HSPARel-6 HSPA+Rel-7 & Rel-8 Ckt Switched Network LTE & LTE Advanced OFDMA-Based CDMA-Based IP e2e Network Mobile WiMAX time to market advantage 2008 2009 2010 2011 2012 3GPP Timeline

  39. 2G, 3G, GSM, EVDO, HSPA 2G, 3G, Core Network Support for Legacy RAN Next Generation Access NetworkData Overlay or ReplacementLTE All-IP Core Network Increased BH Capacity Upgrade Path for Existing Operators Core Network Radio Access Network Backhaul Network T1,E1s Conversion to all-IP core & increased backhaul capacity required in either case Comparable CAPEX LTE in 2+ years.Both require new spectrum

  40. LTE/SAE User Plane & Data Flow Application e.g. IP, Multiple layers, Many nodes and proprietary protocols e.g. IP, PPP PPP Relay Relay PDCP PDCP GTP - U GTP - U GTP - U GTP - U RLC RLC UDP/IP UDP/IP UDP/IP UDP/IP MAC MAC L2 L2 L2 L2 L1 L1 L1 L1 L1 L1 LTE-Uu SGi S1-U E-UTRAN Serving GW S5 PDN GW UE/MS Comparing the End-to-End Network Source: LTE/SAE: 3GPP, Mobile WiMAX: WiMAX Forum Network Specification Release 1.0

  41. Thank You for Your Attention Questions?

  42. Appendix 43

  43. Comparison of WLNA, WiBro, 3G LTE, and 4G

  44. 2G cdmaOne (IS-95 + IS-41) BTS — Base Transceiver Station BSC — Base Station Controller MS — Mobile Station MSC — Mobile Switching Center HLR — Home Location Registry SMS-SC — Short Message Service — Serving Center STM — Synchronous Transfer Mode IS-95 BTS A Ref (A1, A2, A5) STM over T1/T3 MS BSC Proprietary Interface STM over T1/T3 or AAL1 over SONET Ater Ref (A3, A7) BTS IS-95 A Ref (A1, A2, A5) STM over T1/T3 BTS MS BSC Proprietary Interface A1 — Signaling interface for call control and mobility Management between MSC and BSC A5 — Full duplex bearer interface byte stream (SMS ?) A7 — Bearer interface for inter-BSC mobile handoff A2 — 64 kbps bearer interface for PCM voice A3 — Signaling interface for inter-BSC mobile handoff

  45. CDMA2000 1x Network BTS — Base Transceiver Station BSC — Base Station Controller MS — Mobile Station MSC — Mobile Switching Center HLR — Home Location Registry SMS-SC — Short Message Service — Serving Center STM — Synchronous Transfer Mode IS-2000 STM over T1/T3 or AAL1 over SONET BTS A Ref (A1, A2, A5) STM over T1/T3 MS BSC Proprietary Interface AQuarter Ref (A10, A11) IP over Ethernet/AAL5 BTS RADIUS over UDP/IP PDSN — Packet Data Serving Node AAA — Authentication, Authorization, and Accounting A10 — Bearer interface between BSC (PCF) and PDSN for packet data A11 — Signaling interface between BSC (PCF) and PDSN for packet data Home Agent — Mobile IP Home Agent

  46. 1xEVDO — IP Data Only IS-2000 IS-2000 RADIUS over UDP/IP

  47. 1XEVDV — IP Data and Voice SIP SCTP/IP SS7 IS-2000 H.248 (Maybe MGCP) SIP Circuit switched voice SIP Proxy — Session Initiation Protocol Proxy Server MGCF — Media Gateway Control Function SGW — Signaling Gateway (SS7) MGW — Media Gateway (Voice) IS-2000 Nextgen MSC ? Packet switched voice

More Related