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Lte World Summit 2012 Ver 2

Dr. Ayman Elnashar, PhD
Dr. Ayman Elnashar, PhD

Du's mobile broadband network was ranked the best in Africa and the Middle East based on download speed, upload speed, latency, and coverage. Du is moving to deploy LTE to help address increasing data traffic and smartphone usage. Test results showed that LTE using 1800MHz spectrum and 20MHz of bandwidth achieved average downlink speeds of 33Mbps, compared to 12.3Mbps for DC-HSPA+ using 2.1GHz spectrum. LTE also had better spectrum efficiency, higher usage of advanced modulations like 64QAM, improved coverage radius, lower latency, and is expected to provide higher capacity than DC-HSPA+.

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Driving Mobile Broadband Innovation in UAE: LTE Evolution as a Next Step after 42Mbps with DC- HSPA+ Dr. Ayman Elnashar, PhD Sr. Director - Wireless Broadband & Site Sharing EITC (du) UAE email: ayman.elnashar@du.ae
Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced a
du Broadband Portfolio Du mobile broadband network has been ranked the best overall mobile broadband network of the Africa and Middle East Region carriers by ARCchart, an independent research and consulting firm, used a carrier performance matrix to determine the best overall performance across four metrics (i.e., download speed, upload speed, latency, and coverage). 3
Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced 4
Data Traffic Growth Data Traffic Growth 5
Smartphone Penetration Source: Informa 6
Handset 2014 Forecast Smartphones Data Cards/PC Tablets Others/legacy 2014 UE Distribution Forecast
LTE Connection Forecast (250M connections by 2015) LTE connection forecast in developed markets; LTE connection forecast in emerging markets; 2010 2015 [Source: Analysys Mason] 2010 2015 [Source: Analysys Mason] 8
Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced 9
LTE Network Topology: From Simplicity to Reality Simplified LTE network Topology MME / S-GW MME / S-GW S1 S1 S1 S1 X2 E-UTRAN eNB eNB X2 X2 eNB 3GPP TS 36.300 V8.5.0, 2009 10 Typical LTE network Topology
Du Selects 1800MHZ Band for LTE Nationwide! Coverage Gain with Low Frequency DD 800MHz 1800MHz 2.6GHz 3dB 10dB Urban Wide Coverage Distance 1800M: 3~5dB Gain, 30%~50% Site Reduction DD 800: 10 dB Gain 11
Why du Adopted LTE 1800 MHz with 20MHz? 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. 12
LTE Coverage: Cell Radius versus Loading Cell Radius versus Cell Loading HSPA Cell Radius as a function of Loading 1.30 1.20 0.9 1.10 0.8 1.00 10% 0.7 45% Cell Radius(km) 0.90 Cell Radius(Km) 0.80 0.6 0.70 UL 0.5 UL 0.60 DL 0.4 DL 0.50 0.40 0.3 0.30 0.2 0.20 0.1 0.10 0 0.00 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 Cell Loading (%) Cell Loading(%) Impact of cell loading on cell radius for LTE system at Impact of cell loading on cell radius for HSPA+ at 2.1GHz 1800MHz band with urban indoor scenario at in urban indoor scenario at 128kbps/512kbps cell edge 128kbps/512kbps cell edge throughputs for throughputs for UL/DL, respectively. UL/DL, respectively. 13
Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced 14
Du Case Study: LTE versus DC-HSPA+ Two mobility tests are performed as follows: Du 4G/LTE1800MHz Network: LTE CAT 3 (with 100Mbps peak throughput) Data dongle Device LTE Only Mode LTE Band 3 (1800 MHz) with 20 MHz DL bandwidth LTE coverage is present in the entire route Du 4G/HSPA+ Network : Same data dongle device with DC-HSPA+ support UMTS only Mode UMTS 2.1 MHz band with 5+5 MHz DL bandwidth DC-HSPA+ coverage is present in the entire network Test Route Dubai Sheikh Zayed & Jumairah roads as shown in the map. 15
Lte World Summit 2012 Ver 2
HSPA+ Throughput Performance Scheduling rate is 73% Norm. Av. DL Throughput = 12.3 Mbps 8% of DL Throughput is >28Mbps Peak Throughput of 42 Mbps 17
64QAM Utilization - 4G/HSPA+ Modulation Usage 60 50 40 Usage [%] 30 Primary Carrier Secondary Carrier 20 10 0 64QAM 16QAM QPSK Modulation 64QAM usage is 8% per carrier in the entire route weak usage of 64QAM due to low CQI range that allows 64QAM usage on both carriers. This is inline with the early expectation of 64QAM utilization with CDMA- based systems due to spreading in time domain and thus complexity of receiver design and thus increasing the 64QAM requirement threshold. 18
LTE MIMO & 64QAM Usage Two Codewords Usage (MIMO Usage) Modulation Usage 1 1 60% 0.9 0.9 0.8 0.8 50% 40% 0.7 Average = 62% 0.7 64QAM 0.6 0.6 40% Usage [%] PDF 0.5 0.5 CDF 30% 0.4 0.4 0.3 0.3 20% 0.2 0.2 0.1 0.1 10% 0 0 PDF 0% 64QAM 16QAM QPSK CD Usage [%] F Modulation Very good Two code-words usage 64QAM usage is 40% in the entire route (MIMO) in the route 62% compared to 8% with HSPA+ One main factor for LTE to outperform Strong 64QAM usage is another factor HSPA+. Even with MIMO/HSPA+, only for LTE to outperform DC-HSPA+ that ~15% sector throughput improvement is offered only 8% 64QAM usage. expected. 19
Handover Interruption Time LTE data interruption during handover; HSPA+ data interruption during handover; The Average is 50 ms The Average is 128 ms 20
Latency Comparison 21
Benchmarking Summary: LTE versus HSPA+ Criteria DC-HSPA+ (2.1GHz) LTE (1800MHz) Mobility Average 12.3 Mbps with DC 33 Mbps with 20MHz Throughput (2x5MHz) channel BW Mobility Spectrum 1.23 (i.e., 1.65 (i.e., 33 Mbps/ Efficiency 12.3Mbps/10MHz) 20Mhz) Throughput % 8% of the route > 40% of the route > 28Mbps 28Mbps Estimated cell Radius 0.39 Km 0.5 Km (28% improvement) 64QAM Utilization % 8% of the route 40% of the route MIMO usage % N/A (no MIMO with 62% of the route HSPA+) Average Data 128ms 22 50ms
Capacity Dimensioning Comparison 23
Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced 24
LTE DRX DRX Cycles: the UE maintains two DRX cycles called the Short DRX cycle and the Long DRX cycle, which have different durations. The On Duration Timer: Specifies the number of consecutive PDCCH sub-frames (1-200 subframes) during which the UE shall monitor the PDCCH for possible allocations. The DRX Inactivity Timer: Specifies the number of consecutive PDCCH sub-frames (1-2560 subframes). 25
DRX Pros and Cons: Battery Saving vs. Latency Current [mA] 1400 1180.98 1200 34% 1000 battery 734.51 saving 800 641.78 641.07 628.76 634.59 600 501.71 488.86 400 200 6.57 0 Test Case #1 Test Case #1 Test Case #1 Test Case #2 Test Case #3 Test Case #4 Test Case #5 Test Case #6 Test Case #7 No UL Activity - FTP Download Ping Test - Idle Connected Mode IDLE Mode - Connected Mode RTT [ms] 32 Bytes 640 Bytes 1460 Bytes 5000 Bytes 70 64 60 56 55 52 51 50 50 49 48 47 50 45 44 44 10 ms 42 42 42 37 37 38 increase 40 in RTT 29 30 19 20 13 13 10 11 12 8 9 8 7 6 6 10 0 DRX OFF (Test Test Case #3 Test Case #4 Test Case #5 Test Case #7 Difference (Best Difference (Worst Difference (Avrg Cases #1 & #2) 26 with DRX ON - DRX with DRX ON - DRX with DRX ON - DRX OFF) OFF) OFF)
Impact of DRX on Website Loading Time Webpage Website Avrg Content Loading Time [sec] Data Size [KBytes] 16 250 14 200 12 10 9 9 150 8 8 8 7 5 100 6 4 3 4 3 3 2 2 2 2 2 2 2 2 50 2 2 1 0 0 Youtube.com Apple.com Facebook.com Google.com DRX OFF (Test Cases #1 & #2) Test Case #3 Test Case #4 Test Case #5 Test Case #7 Web Site Avrg Data Size 27
Thank You 28

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Lte World Summit 2012 Ver 2

  • 1. Driving Mobile Broadband Innovation in UAE: LTE Evolution as a Next Step after 42Mbps with DC- HSPA+ Dr. Ayman Elnashar, PhD Sr. Director - Wireless Broadband & Site Sharing EITC (du) UAE email: ayman.elnashar@du.ae
  • 2. Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced a
  • 3. du Broadband Portfolio Du mobile broadband network has been ranked the best overall mobile broadband network of the Africa and Middle East Region carriers by ARCchart, an independent research and consulting firm, used a carrier performance matrix to determine the best overall performance across four metrics (i.e., download speed, upload speed, latency, and coverage). 3
  • 4. Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced 4
  • 5. Data Traffic Growth Data Traffic Growth 5
  • 6. Smartphone Penetration Source: Informa 6
  • 7. Handset 2014 Forecast Smartphones Data Cards/PC Tablets Others/legacy 2014 UE Distribution Forecast
  • 8. LTE Connection Forecast (250M connections by 2015) LTE connection forecast in developed markets; LTE connection forecast in emerging markets; 2010 2015 [Source: Analysys Mason] 2010 2015 [Source: Analysys Mason] 8
  • 9. Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced 9
  • 10. LTE Network Topology: From Simplicity to Reality Simplified LTE network Topology MME / S-GW MME / S-GW S1 S1 S1 S1 X2 E-UTRAN eNB eNB X2 X2 eNB 3GPP TS 36.300 V8.5.0, 2009 10 Typical LTE network Topology
  • 11. Du Selects 1800MHZ Band for LTE Nationwide! Coverage Gain with Low Frequency DD 800MHz 1800MHz 2.6GHz 3dB 10dB Urban Wide Coverage Distance 1800M: 3~5dB Gain, 30%~50% Site Reduction DD 800: 10 dB Gain 11
  • 12. Why du Adopted LTE 1800 MHz with 20MHz? 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. 12
  • 13. LTE Coverage: Cell Radius versus Loading Cell Radius versus Cell Loading HSPA Cell Radius as a function of Loading 1.30 1.20 0.9 1.10 0.8 1.00 10% 0.7 45% Cell Radius(km) 0.90 Cell Radius(Km) 0.80 0.6 0.70 UL 0.5 UL 0.60 DL 0.4 DL 0.50 0.40 0.3 0.30 0.2 0.20 0.1 0.10 0 0.00 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 Cell Loading (%) Cell Loading(%) Impact of cell loading on cell radius for LTE system at Impact of cell loading on cell radius for HSPA+ at 2.1GHz 1800MHz band with urban indoor scenario at in urban indoor scenario at 128kbps/512kbps cell edge 128kbps/512kbps cell edge throughputs for throughputs for UL/DL, respectively. UL/DL, respectively. 13
  • 14. Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced 14
  • 15. Du Case Study: LTE versus DC-HSPA+ Two mobility tests are performed as follows: Du 4G/LTE1800MHz Network: LTE CAT 3 (with 100Mbps peak throughput) Data dongle Device LTE Only Mode LTE Band 3 (1800 MHz) with 20 MHz DL bandwidth LTE coverage is present in the entire route Du 4G/HSPA+ Network : Same data dongle device with DC-HSPA+ support UMTS only Mode UMTS 2.1 MHz band with 5+5 MHz DL bandwidth DC-HSPA+ coverage is present in the entire network Test Route Dubai Sheikh Zayed & Jumairah roads as shown in the map. 15
  • 17. HSPA+ Throughput Performance Scheduling rate is 73% Norm. Av. DL Throughput = 12.3 Mbps 8% of DL Throughput is >28Mbps Peak Throughput of 42 Mbps 17
  • 18. 64QAM Utilization - 4G/HSPA+ Modulation Usage 60 50 40 Usage [%] 30 Primary Carrier Secondary Carrier 20 10 0 64QAM 16QAM QPSK Modulation 64QAM usage is 8% per carrier in the entire route weak usage of 64QAM due to low CQI range that allows 64QAM usage on both carriers. This is inline with the early expectation of 64QAM utilization with CDMA- based systems due to spreading in time domain and thus complexity of receiver design and thus increasing the 64QAM requirement threshold. 18
  • 19. LTE MIMO & 64QAM Usage Two Codewords Usage (MIMO Usage) Modulation Usage 1 1 60% 0.9 0.9 0.8 0.8 50% 40% 0.7 Average = 62% 0.7 64QAM 0.6 0.6 40% Usage [%] PDF 0.5 0.5 CDF 30% 0.4 0.4 0.3 0.3 20% 0.2 0.2 0.1 0.1 10% 0 0 PDF 0% 64QAM 16QAM QPSK CD Usage [%] F Modulation Very good Two code-words usage 64QAM usage is 40% in the entire route (MIMO) in the route 62% compared to 8% with HSPA+ One main factor for LTE to outperform Strong 64QAM usage is another factor HSPA+. Even with MIMO/HSPA+, only for LTE to outperform DC-HSPA+ that ~15% sector throughput improvement is offered only 8% 64QAM usage. expected. 19
  • 20. Handover Interruption Time LTE data interruption during handover; HSPA+ data interruption during handover; The Average is 50 ms The Average is 128 ms 20
  • 22. Benchmarking Summary: LTE versus HSPA+ Criteria DC-HSPA+ (2.1GHz) LTE (1800MHz) Mobility Average 12.3 Mbps with DC 33 Mbps with 20MHz Throughput (2x5MHz) channel BW Mobility Spectrum 1.23 (i.e., 1.65 (i.e., 33 Mbps/ Efficiency 12.3Mbps/10MHz) 20Mhz) Throughput % 8% of the route > 40% of the route > 28Mbps 28Mbps Estimated cell Radius 0.39 Km 0.5 Km (28% improvement) 64QAM Utilization % 8% of the route 40% of the route MIMO usage % N/A (no MIMO with 62% of the route HSPA+) Average Data 128ms 22 50ms
  • 24. Agenda du Broadband Portfolio Why LTE? LTE Evolution LTE Network Topology LTE Network Performance Expectation LTE versus HSPA+: Performance Comparison based on Field Results Capacity Comparison Advanced Features and LTE-Advanced 24
  • 25. LTE DRX DRX Cycles: the UE maintains two DRX cycles called the Short DRX cycle and the Long DRX cycle, which have different durations. The On Duration Timer: Specifies the number of consecutive PDCCH sub-frames (1-200 subframes) during which the UE shall monitor the PDCCH for possible allocations. The DRX Inactivity Timer: Specifies the number of consecutive PDCCH sub-frames (1-2560 subframes). 25
  • 26. DRX Pros and Cons: Battery Saving vs. Latency Current [mA] 1400 1180.98 1200 34% 1000 battery 734.51 saving 800 641.78 641.07 628.76 634.59 600 501.71 488.86 400 200 6.57 0 Test Case #1 Test Case #1 Test Case #1 Test Case #2 Test Case #3 Test Case #4 Test Case #5 Test Case #6 Test Case #7 No UL Activity - FTP Download Ping Test - Idle Connected Mode IDLE Mode - Connected Mode RTT [ms] 32 Bytes 640 Bytes 1460 Bytes 5000 Bytes 70 64 60 56 55 52 51 50 50 49 48 47 50 45 44 44 10 ms 42 42 42 37 37 38 increase 40 in RTT 29 30 19 20 13 13 10 11 12 8 9 8 7 6 6 10 0 DRX OFF (Test Test Case #3 Test Case #4 Test Case #5 Test Case #7 Difference (Best Difference (Worst Difference (Avrg Cases #1 & #2) 26 with DRX ON - DRX with DRX ON - DRX with DRX ON - DRX OFF) OFF) OFF)
  • 27. Impact of DRX on Website Loading Time Webpage Website Avrg Content Loading Time [sec] Data Size [KBytes] 16 250 14 200 12 10 9 9 150 8 8 8 7 5 100 6 4 3 4 3 3 2 2 2 2 2 2 2 2 50 2 2 1 0 0 Youtube.com Apple.com Facebook.com Google.com DRX OFF (Test Cases #1 & #2) Test Case #3 Test Case #4 Test Case #5 Test Case #7 Web Site Avrg Data Size 27
  • 28. Thank You 28