LTE Evolution


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Speech at Middle East Telco World Summit 29-30 Nov. 2011

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LTE Evolution

  1. 1. DRIVING BROADBANDINNOVATION IN UAE; DU LTE EVOLUTION Dr. Ayman Elnashar Sr. Director - Wireless Broadband & Site Sharing EITC (du) - UAE
  2. 2. Agenda  Driving Wireless Broadband Innovation in UAE: du Broadband Portfolio  Why LTE (Data Evolution)  Speed Enhancement  Latency Reduction  Rich QoS capability  All IP Simple flat architecture  LTE Evolution  Spectrum Options  Deployment Strategy  Trial Results
  3. 3. du Broadband Portfolio du Fixed network Nationwide Mobile Broadband LTE Evolution Services HSPA+/DC-HSPA+ (42Mbps)* FDD Technologies Fixed xDSL & Fiber „Ultra Broadband‟ Wide Area Broadband Mobile 2G 2.5G 3G 3.X G everywhereCoverage/Mobility Local Area Metro Area du UAE Nationwide Fixed Wireless Nomadic Mobile Network 802.11b/a/g/n TDD Technologies 802.16d WiMax in 3.5GHz for du WiFi small SME Hotspots Fixed Wireless Broadband services using OFDM (PTP & PTMP) high capacity Links with up to 300Mbps for SME and Enterprise customers Data Speeds (Kbps) Fixed Wireless * Du is the 1st in UAE to deploy the DC-HSPA+ nationwide and UAE is the 6th nation globally to deploy this technology thanks to du. 3
  4. 4. Why LTE? 4
  5. 5. 3GPP Evolutions; HSPA + & LTE 5
  6. 6. HSPA+ vs. LTE Peak Data Rates DL/UL LTE 326Mbps HSPA+ (WCDMA) LTE (OFDMA) scales linearily scales linearily in Throughput in bandwidth (multi carrier) bandwidth (single carrier) and proportionally in and in single user-MIMO single user -MIMO (max. factors (max. 4x4) LTE 2x2) 173Mbps 86Mbps LTE LTE 43Mbps 86Mbps 21Mbps 43Mbps HSPA+ HSPA+(DC) 42Mbps 84Mbps* 86Mbps MIMO 11Mbps 22Mbps* 43Mbps Rx/Tx LTE HSPA+ 4 43Mbps LTE DL:21Mbps 21Mbps 2 DL:5Mbps UL:11Mbps 1 1.4Mhz 10Mhz 20Mhz Bandwidth 5Mhz * Chipset Roadmap delayed for 2012 and we may need additional carrier to get the peak throughput as MIMO will not add any gain for voice (R99). Page 6
  7. 7. HSPA+ vs. LTE HSPA+ LTE 172Mbps@20Mhz (2x2) Peak Rate 84Mbps@10MHz 326.4Mbps@20MHz(4x4)Spectrum Efficiency 8.4bps/Hz (Peak for DC+ MIMO 8.6bps/Hz (Peak for 2x2 MIMO) (Peak) + 64QAM)Spectrum Efficiency 1.717/0.99 (2x2 MIMO) (Average cell 1.424/0.6 (MIMO+64QAM) 20% improvement in DLthroughput) (DL/UL) 65% improvement in the UL Transmission Full system bandwidth Variable up to full system bandwidth bandwidth Ideal for MIMO due to signal Requires significant computing representation in the frequency power due to signal beingSuitability for MIMO domain and possibility of narrowband defined in the time domain and (i.e., MIMO Gain) allocation to follow real-time variations on top of spreading (frequency in the channel selective channel) (Frequency nonselective channel) 7
  8. 8. HSPA+ vs. LTE Latency Improvement Latency Control plane Idle -> active LTE 100 User plane latency (RTT) 13 HSPA+ 800 40 1800 HSPA 55 0 200 400 600 800 1000 1200 1400 1600 1800 D e l a y ( ms ) Delay to access a 60kByte web page 2500 2350 HSPA 2000 HSPA+ LTE Delay (ms) 1500 1200 1000 500 300 WOW 0 HSPA HSPA+ LTE For web site access response, LTE requires ¼ of time of HSPA+ and 1/8 of HSPA Page 8
  9. 9. LTE versus DC-HSPA+: LTE will BringSignificant improvements LTE is the next step in the user experience and essential to take mobile broadband to the mass market
  10. 10. LTE Brings More New Data Services than HSPA+ Data application GPRS/EDGE UMTS LTE SMS ★ ★ ★ Ring back Tone ★ ★ ★ Basic online Gaming ★ ★ ★ MMS ★ ★ ★ WAP browsing ★ ★ ★ Email ★ ★ ★ “Classic” WEB browsing ★ ★ ★ Video Ring Back Tone ★ ★ High-end Gaming ★ ★ High quality online video ★ ★ Video telephony ★ ★ “Super-fast” WEB browsing ★ ★ Broadcast Mobile TV (MBMS) ★ ★ Corporate VPN, intranet ★ ★ true on-demand television ★ Video-based mobile advertising ★ Wireless DSL ★ Mobile WEB2.0 (social community, P2P) ★ High quality online gaming (consistent experience with fix network) ★ Page 10
  11. 11. LTE Brings Better MBB Experience than HSPA+ Technology EDGE UMTS HSPA HSPA DC-HSPA+ LTE 56kbps 512kbps 2Mbps 8mbps 42Mbps 100Mbps (Cell Throughput) Web surfing 36 Seconds 4 Seconds 1 Second 0.3 Second 0.1 Seconds 0.025 Second (response time) Download 5M 12 Minutes 1Minutes 20 Seconds 5 Seconds 2 Seconds 0.5 Second 18 seconds Music Download 25M 1 Hour 6Minutes 1 Minute 25 Seconds 8 Seconds 2 Seconds 31Seconds 40Seconds Video Download 750M 29 Hours 3 Hours 50 12 Minutes 4 Minutes 1 Minutes 15 Minutes Minutes 30 Seconds 10 Seconds 20 Seconds HD movie
  12. 12. LTE Network: A Simple Architecture leads to lower cost per bit Simplified/Flat All IP Architecture:  CS core network removed – PS only  UMTS RNC “removed”, RNC functionalities moved to the eNodeB  eNodeB connected directly to the Evolved Packet Core (EPC) 12
  13. 13. QoE Expectations and PerformanceRequirements by Service Type 13
  14. 14. 3GPP QoS Parameters: QCI Resourc Packet Packet QCI e Priority Delay Loss Example Services Type Budget Rate 1 2 100ms 10-2 Conversational Voice 2 4 150ms 10-3 Conversational Video (live streaming) GBR 3 3 50ms 10-3 Real Time Gaming 4 5 300ms 10-6 Non-conversational Video (buffered streaming) 5 1 100ms 10-6 IMS Signalling Video (Buffered Streaming); TCP-based (e.g. www, 6 6 300ms 10-6 e-mail, chat, ftp, p2p file sharing, progressive video, etc.) Non- 7 GBR 7 100ms 10-3 Voice, Video (Live Streaming), Interactive Gaming 8 8 Video (Buffered Streaming); TCP-based (e.g. www, 300ms 10-6 e-mail, chat, ftp, p2p file sharing, progressive video, 9 9 etc.) The QCI is further used within the LTE access network to define the control packet-forwarding treatment from an end-to-end perspective. It also ensures a minimum standard level of QoS to ease the interworking between the LTE networks mainly in roaming cases and in multi-vendor environments PDB defines an upper bound delay that a packet is allowed to experience between UE & PCEF
  15. 15. LTEEvolution 15
  16. 16. Key Technologies of LTE 16
  17. 17. OFDM, the state-of-the-art Radio Access Technology:Moving from Time Domain to Frequency Domain 17
  18. 18. Why OFDM/SC-FDMA Robustness against multipath which makes it suitable for broadband systems compared to TDMA/CDMA techniques. SC-FDMA brings additional benefit of low peak-to- average power ratio (PAPR) making it suitable for uplink transmission and then extend UE battery life. Receiver design is very simple thanks to frequency non-selective (i.e., flat fading) channel. OFDM is inherently susceptible to channel dispersion since OFDM symbol time is much larger than the typical channel dispersion. 18
  19. 19. MIMO: the Key to Improve Cell Throughput 1x2 SIMO eNodeB UE 1 2x2 MIMO eNodeB UE 1 In typical urban area:  15%~28% gain over SIMO @ Macro  ~50% gain over SIMO @ Micro 19
  20. 20. LTE key features Simplified Architecture  IP Core: flat, scalable  Backhaul based on IP / MPLS transport Gateway  Fits with IMS, VoIP, SIP Improved spectral efficiency  Orthogonal Frequency Division Multiple Access (OFDMA) for Downlink (DL) and Single Carrier Frequency Division Multiple Access (SC-FDMA) for Uplink (UL) All IP Flat Architecture  Robust modulation in dense environments  Increased spectral efficiency  Simplified Receiver design  cheaper terminal  Scalable - go beyond 5 MHz1.4 MHz 3 MHz 5 MHz 10 MHz 15 MHz 20 MHz limitation Refarm 2G Refarm 3G New Spectrum  MIMO (Multiple-Input, Multiple- Output) for UL& DL Scalable Bandwidth  Increased link capacity  Multi-Users MIMO (UL)  Overcome multi-path interference Increasing Bandwidth Decreasing Latency Page 20
  21. 21. Spectrum Options 21
  22. 22. LTE Spectrum and Re-farming Options Freq. Bands 3.5 GHz WiMAX LTE? WiMAX? 2.6 GHz LTE 2.1 GHz LTE? 1800 MHz LTE GSM UMTS / HSPA? GSM UMTS / HSPA 900 MHz LTE DD UMTS / HSPA? LTE 2008 2010 2015 2020 2025  New Bands well suited for LTE to avoid refarming when introducing new technology  2.6GHz spectrum mainly for LTE  “Digital Dividend” (e.g. 800MHz/700MHz bands): Trend is to use it for LTE  2.1GHz spectrum: bandwidth mostly for UMTS/HSPA/HSPA+ and few countries for LTE  900MHz, 1800MHz, AWS re-farming is needed before UMTS/HSPA or LTE usage  900MHz refarming already started for UMTS usage => may not be possible to use it for LTE in most of countries  1800MHz will be re-farmed directly to LTE  AWS is planned for LTE use in North America Possible rollout scenarios: LTE 2.6GHz/AWS/1.8GHz/DD vs. HSPA+ 2.1GHz/900MHz Page 22
  23. 23. Why LTE 1800 Coverage area is about 2X larger than LTE2.6GHz with better indoor penetration. 35% improvement in cell edge throughput compared to LTE2.6GHz. Reduction of Extra sites results in quick delivery of the LTE to market. Reuse of existing GSM1800 coverage polygons and possibility to share antenna system of GSM1800. Reuse of existing IBS system without upgrade to support 2.6GHz and without coverage degradation. LTE1800: promising and available for mass market 23
  24. 24. Deployment Strategy 24
  25. 25. Antennas Separation and Guard BandRequirement for Co-Existing System Horizontal Distance: 0.5m 2/3G band x Vertical Distance: 0.2m LTE band x 2/3G band x LTE band x Horizontal 0.5m or vertical 0.2m antennas separation is the minimum requirement Guard band Requirement for Co-existing Systems ( MHz ) LTE Bandwidth Co-existing Systems 5MHz 10MHz 15MHz 20MHz LTE1800 + GSM1800 0.2 0.2 0.2 0.2 LTE Band X + LTE Band Y 0 0 0 0 LTE FDD + LTE TDD 10 10 10 10 25
  26. 26. 26
  27. 27. Download Volume Speed (1GB and 10GB ) 27
  28. 28. Thank You 28