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Broadband Evolution and  Spectrum Challenges     Dr Ayman Elnashar    Sr. Director - Wireless  Broadband & Site Sharing   ...
Agenda Driving Wireless Broadband  Innovation in UAE: du Broadband  Portfolio Fixed Wireless Broadband Evolutions Mobil...
du Broadband Portfolio                                                                                                    ...
Fixed Wireless  Broadband   Services                 4
Fixed Wireless Broadband Evolution using state of theart OFDM technology: New Features  Up to 300Mbps in 40MHz TDD channe...
Point-to-Point with DoubleStream MIMO (near to the BTS)                      Different data is sent separately over two po...
DC-HSPA+Evolution            7
HSPA+ Evolution                                                                                 84M          Single Carrie...
DC-HSPA+: Improve Data Rates               Use 2 adjacent carriers to            transmit simultaneously data to          ...
HSPA+ Evolutions: MIMO vs. DC     Criteria/Evolution                  DC                  MIMO           Peak Rate        ...
HSPA+ Coverage Comparison                                             Coverage Comparison                     6           ...
LTEEvolution            12
OFDM, the state-of-the-art Radio Access Technology:Moving from Voice to Broadband with VoIP                               ...
Why OFDM/SC-FDMA The main advantage of OFDM, as is for SC-FDMA, is its  robustness against multipath signal propagation, ...
Interference Management in LTE                        Site1          Sector 1                      • Inter-site (UL)      ...
MIMO: the Key to Improve Cell Throughput                1x2 SIMO   eNodeB                          UE 1                2x2...
LTE RAN Performance: Simulations Results         Peak Cell/User Throughput                                               A...
Antennas Separation and Guard BandRequirement for Co-Existing System     Horizontal Distance: 0.5m                        ...
19
HSPA+ vs. LTE                                HSPA+                                   LTE                                  ...
Coverage Comparison                                                     Coverage Comparison                              6...
HSPA Cell Radius as a Function of Loading                                      HSPA Cell Radius as a function of Loading  ...
LTE Cell Radius as a function of Loading                                         LTE Cell Radius as a function of Loading ...
Average Cell Throughput Comparison                        UL Average Cell         Scheme                                  ...
Supported Simultaneous users for HSPA+ and LTE Assumptions:  - Urban Scenario (500 sites)  - HSPA+        1. Scenario 1: ...
LTETerminals            26
LTE Commercial Terminals
Thank You            28
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Wireless Broadband Evolution

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Transcript of "Wireless Broadband Evolution"

  1. 1. Broadband Evolution and Spectrum Challenges Dr Ayman Elnashar Sr. Director - Wireless Broadband & Site Sharing EITC (du) - UAE
  2. 2. Agenda Driving Wireless Broadband Innovation in UAE: du Broadband Portfolio Fixed Wireless Broadband Evolutions Mobile Broadband Evolutions  DC-HSPA+  LTE Evolution  LTE Deployment Strategy  LTE Terminals
  3. 3. du Broadband Portfolio du Fixed network Nationwide Mobile Broadband LTE Evolution Services HSPA+/DC-HSPA+ (42Mbps)* Fixed xDSL & Fiber ‘Ultra Broadband’ Wide Area Broadband Mobile 2G 2.5G 3G 3.X G everywhere du WiMAX network forCoverage/Mobility FDD & TDD the Dubai Metro** 802.16e Local Area Metro Area du UAE Nationwide TDD Fixed Wireless Nomadic Mobile Network WiMAX du outdoor Mesh- WiFi 802.16d WiMax in 3.5GHz for Outdoor small SME Mesh WiFi Fixed Wireless Broadband 802.11b/a/g/n services using OFDM (PTP & PTMP) high capacity Links with up to 300Mbps for SME and du WiFi Enterprise customers Hotspots 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. **Winner of 2009 most innovative mobility project by Cisco Networkers 3
  4. 4. Fixed Wireless Broadband Services 4
  5. 5. Fixed Wireless Broadband Evolution using state of theart OFDM technology: New Features  Up to 300Mbps in 40MHz TDD channel using MIMO 2x2 with cross-polarization which means Spectral efficiency of 6+ bit/Hz/s.  Support of 4.9 – 6.0 GHz in one radio.  Dynamic TDD: Adjusts the uplink/ downlink ratio based on traffic demand.  Low Latency (<2ms in PTP, <7ms in PMP)  Extended range up to 120 Km  Support of AES 128 and AES 256 encryption for reliable and secure communications.  Self-synchronizing or time synchronization without GPS.  Autobitrate (Automatic Rate Control) Functionality or Hitless ACM with error-free operation. 5
  6. 6. Point-to-Point with DoubleStream MIMO (near to the BTS) Different data is sent separately over two polarizations resulting in higher radio efficiency Vertical Vertical Polarization Polarization Backhaul Backhaul Horizontal Horizontal Polarization Polarization 6
  7. 7. DC-HSPA+Evolution 7
  8. 8. HSPA+ Evolution 84M Single Carrier – 5MHz Dual Carrier – 10MHz 56M 42M 42M 28M 28M 21M 14.4M HSDPA 64QAM MIMO 64QAM+MIMO DC DC+64QAM DC+MIMO DC+MIMO+64QAM HSPA+ Improves Peak Rates while providing Higher QoS and Customer Loyalty 8
  9. 9. DC-HSPA+: Improve Data Rates Use 2 adjacent carriers to transmit simultaneously data to the same user Dual cells covers the same geographical area Anchor Carrier 5MHz 5MHz Frequency 1 Supplementary Carrier Frequency 2 frequencey1 frequencey2 f Two frequencies are Downlink peak rate adjacent double 28.8M/42Mbps Full use of the two cells resource by Joint Scheduling and Load Balance 9
  10. 10. HSPA+ Evolutions: MIMO vs. DC Criteria/Evolution DC MIMO Peak Rate 42Mbps in 10Mhz band 42Mbps in 5Mz band Coverage Performance Better -- Throughput Performance -- Slightly Better Latency Performance Better -- Service Type (Full Buffer) -- Better Service Type (Burst) Better -- CAPEX Investment Low High DC introduces high improvement at the user level;while MIMO introduces little improve at the cell level; 10
  11. 11. HSPA+ Coverage Comparison Coverage Comparison 6 5.3 5 Cell Radius(km) 3.9 4 MIMO+64QAM 3 2.2 DC+64QAM 2 1.7 1 0.330.43 0.5 0.63 0 Dense Urban Urban Suburb Rural Scenario Cell Radius Dense Urban Urban Suburb Rural MIMO+64QAM 0.33 0.5 1.7 3.9 DC+64QAM 0.43 0.63 2.2 5.3 Remark: Cell edge throughput 1024kbps 11
  12. 12. LTEEvolution 12
  13. 13. OFDM, the state-of-the-art Radio Access Technology:Moving from Voice to Broadband with VoIP 13
  14. 14. Why OFDM/SC-FDMA The main advantage of OFDM, as is for SC-FDMA, is its robustness against multipath signal propagation, 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) compared to OFDM making it suitable for uplink transmission by user-terminals to extend battery life. OFDM can also be viewed as a multi-carrier system but each subcarrier is usually narrow enough that multipath channel response is flat over the individual subcarrier frequency range, i.e. frequency non-selective (i.e., flat fading) and hence receiver design is very simple. In other words, OFDM symbol time is much larger than the typical channel dispersion. Hence OFDM is inherently susceptible to channel dispersion due to multipath propagation. 14
  15. 15. Interference Management in LTE Site1 Sector 1 • Inter-site (UL) Sector 2 ICIC in frequency domain: In the edge of the Sector 3 site, the bandwidth is divided into 3 pieces, and each site use a piece; In the center ofSite2 the site, the left bandwidth can be used; Site3 • Intra-site (UL) ICIC in time domain: adjacent cells use Uplink different subframe; as show in the Figure, yellow zone use odd subframe, while light blue zone use even subframe. • Inter/Intra-site (DL) Cell edge: frequency division, separated by transmit power Cell central: all bandwidth are transmitted. Control coverage to reduce interference Downlink 15
  16. 16. 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 16
  17. 17. LTE RAN Performance: Simulations Results Peak Cell/User Throughput Average Cell throughput Peak Throughput LTE FDD 20 MHz Average cell Throughput LTE FDD Mbps MBps/s 20 MHz Downlink 326 70 Downlink Average cell throughput Spectral efficiency in Bps/s/Hz 300 60 57 3 Spectrum Efficiency 50 200 173 39 40 2 Uplink 33 86 30 100 58 20 1 10 0 1X2 UL 1X2 UL MIMO MIMO 0 0 16 QAM 64 QAM 2x2 DL 4x4 DL MIMO 2x2 MIMO 4x2 MIMO 4x4 Ultra-Low Latency End-to-end RTT 13 ms Handover interruption 12-19 ms Connection Setup 52 - 82 ms Delay to access a 60kByte w eb page (from Idle) 300 ms 17
  18. 18. 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 ) System Standards LTE Bandwidth Co-existing Systems LTE Other system 5MHz 10MHz 15MHz 20MHz LTE1800 + GSM1800 protocol protocol 0.2 0.2 0.2 0.2 LTE2100 + UMTS2100 protocol protocol 0.33 0.08 0.17 0.42LTE Band X + LTE Band Y protocol protocol 0 0 0 0 LTE FDD + LTE TDD protocol protocol 10 10 10 10 18
  19. 19. 19
  20. 20. 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) 20
  21. 21. Coverage Comparison Coverage Comparison 6 5.33 4.62 4.68 5 Cell Radius in DL(Km) 4 HSPA 2.1GHz 3.18 LTE 2.1GHz 3 2.58 2.34 LTE 2.6GHz 2 0.78 0.64 1 0.57 0.380.49 0.4 0 Dense urban Urban Suburban Rural Scenario Cell Radius in DL (Km) Scenario Dense urban Urban Suburban Rural HSPA 2.1GHz 0.38 0.57 2.34 4.62 LTE 2.1GHz 0.49 0.78 3.18 5.33 LTE 2.6GHz 0.4 0.64 2.58 4.68 DL Cell Radius Comparison. DL Cell edge throughput 512kbps, Indoor Coverage, 90% Cell Loading 21
  22. 22. HSPA Cell Radius as a Function of Loading HSPA Cell Radius as a function of Loading 0.9 0.8 0.7 Cell Radius(km) 0.6 0.5 UL 0.4 DL 0.3 0.2 0.1 0 10 20 30 40 50 60 70 80 90 100 Cell Loading(%) Cell Cell Radius (Km) Loading(%) 10 20 30 40 50 60 70 80 90 100 % UL 0.8 0.77 0.74 0.71 0.67 0.63 0.59 0.52 0.43 0.02 98% DL 0.79 0.75 0.71 0.67 0.62 0.58 0.54 0.49 0.45 0.43 45% HSPA+ 2.1GHz,Urban scenario, indoor coverage, 128kbps/512kbps in UL/DL
  23. 23. LTE Cell Radius as a function of Loading LTE Cell Radius as a function of Loading 0.9 0.8 0.7 Cell Radius(km) 0.6 0.5 UL 0.4 DL 0.3 0.2 0.1 0 10 20 30 40 50 60 70 80 90 100 Cell Loading(%) Cell Cell Radius (Km) Loading(%) 10 20 30 40 50 60 70 80 90 100 % UL 0.52 0.51 0.5 0.49 0.48 0.47 0.46 0.45 0.44 0.42 19% DL 0.79 0.77 0.76 0.74 0.72 0.71 0.68 0.66 0.64 0.61 23% LTE 2.6GHz,Urban scenario, Indoor coverage, 128kbps/512Kbps in UL/DL. 23
  24. 24. Average Cell Throughput Comparison UL Average Cell Scheme Remark Throughput HSUPA 10ms 2.1Mbps CAT5,urban,UL cell load 75% HSUPA 2ms 2.3Mpbs CAT6,urban,UL cell load 75% HSUPA 16QAM 3.0Mbps CAT7,urban,UL cell load 90% LTE 10MHz 9.7Mpbs Urban,2.6GHz LTE 20MHz 19.8Mbps Urban,2.6GHz DL Average Cell Scheme Remark Throughput HSPA(16QAM) 6.0Mpbs Urban, bandwidth 5MHz HSPA+(64QAM) 6.41Mbps Urban,bandwidth 5MHz HSPA+(MIMO) 6.98Mpbs Urban,bandwidth 5MHz HSPA+(MIMO+64QAM) 7.12Mbps Urban,bandwidth 5MHz HSPA+(DC+16QAM) 6.43Mpbs Urban,bandwidth 5MHz HSPA+(DC+64QAM) 6.89Mbps Urban,bandwidth 5MHz LTE 10MHz 16.92Mpbs Urban,2.6GHz LTE 20MHz 34.34Mbps Urban,2.6GHz 24
  25. 25. Supported Simultaneous users for HSPA+ and LTE Assumptions: - Urban Scenario (500 sites) - HSPA+ 1. Scenario 1: 1st carrier R99+HSAP(5 codes), 2nd carrier HSPA+(15 codes) 2. Scenario 2: 1st carrier HSPA+ (15 codes), 2nd carrier HSPA+(15 codes) - LTE bandwidth: 10 & 20 MHz - Traffic Model assumption: data user 50kbps, voice user 0.025Elr - HSPA+ can support CS and PS service, LTE only support PS service. BB subscribers Number of supported LTE Capacity gain Capacity/Cell supported per simultaneous users compared to HSPA+ % site per network HSPA 2.1GHz 22Elr(CS AMR12.2) 325 162K 100% (scenario 1) 9.3Mbps(PS HSPA+) 13 Mbps:2 native HSPA+ HSPA 2.1GHz carriers, no voice with 455 227K 140% (scenario 2) DC-HSPA+ LTE 10MHz @ 16.92 Mbps 592 296K 182% at 2.6 GHz LTE 20 @ 34.3Mbps 1202 601K 370% 2.6GHz 25
  26. 26. LTETerminals 26
  27. 27. LTE Commercial Terminals
  28. 28. Thank You 28
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