Driving Broadband Innovation in UAEDubai Metro: A CASE STUDYDr. Ayman ElnasharDirector - Wireless BroadbandEITC (du)UAE
Agenda• du Broadband Portfolio• Dubai Metro: A Case Study• WiMAX Versus HSPA+ Evolution
du Broadband Portfolio                        Mobile Broadband                                                          du...
Du Broadband Wireless PortfolioExecutive Summary•  Nationwide HSPA(+) Network•  WiMAX Technologies      Mobile WiMAX (802....
DUBAI METRO: A CASE STUDYAward: The most innovativeMobility Project for 2009 by CISCO                                     5
DUBAI METROThe Dubai Metro project consists of two lines, i.e., Red line track (52.1 km) and Green Line (17.6 km).        ...
DUBAI METRO: AN OVERVIEW                TRAIN                                                 WiFi AP           On-Board W...
WHY WIMAX BACKHAULING                        8
WiMAX Versus HSPA                    9
Cell Radius Comparison between WiMAXat 2.6 GHz and HSPA at 2.1GHz                                                      •  ...
Effect of Loading on HSPA Cell Radius•  Cell Breathing Phenomena: Cell Radius shrinks as a function of   loading      Even...
Supported 512Kbps users at cell Edge Vs. HSPA CellRadius                                                                  ...
Capacity Comparison per CellWiMAX using 10 MHz ChannelHSPA(+) using 2x5 MHz Carrier (10 MHz DL/10 MHz UL) i.e., 20MHz     ...
Capacity Comparison per SiteWiMAX using 3x10 MHz Channels (30 MHz) (30 MHz with 1/1/3Frequency reuse)HSPA(+) using 2x5 MHz...
WiMAX Pros and Cons•  No cell breathing and therefore QOS can be guaranteed even at cell    edge.•  TDD spectrum is cheape...
WiMAX Pros and Cons Cont…•  Since WiMAX is based on TDD then guardband between TDD & FDD is    mandatory. Therefore, a net...
HSPA(+) Pros and Cons •  No need for guardband between adjacent operator and carrier leakage can     be tackled since CDMA...
Thank You            18
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Wi Max Mena Dubai Conference

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Transcript of "Wi Max Mena Dubai Conference"

  1. 1. Driving Broadband Innovation in UAEDubai Metro: A CASE STUDYDr. Ayman ElnasharDirector - Wireless BroadbandEITC (du)UAE
  2. 2. Agenda• du Broadband Portfolio• Dubai Metro: A Case Study• WiMAX Versus HSPA+ Evolution
  3. 3. du Broadband Portfolio Mobile Broadband du Fixed network Services du WiMAX network for the Dubai Metro du UAE Nationwide Mobile Network du outdoor Mesh-WiFi du Pre-WiMAX Point -to-Point & Point-to -MultipointLinks du WiFi Hotspots 3
  4. 4. Du Broadband Wireless PortfolioExecutive Summary•  Nationwide HSPA(+) Network•  WiMAX Technologies   Mobile WiMAX (802.16e) as backhaul for Metro WiFi   Fixed WiMAX (802.16d) and Pre-WiMAX (Proprietary OFDM technology) as an extension to fixed services and for very high bandwidth requirements in Remote Areas.•  WiFi Technologies   Nationwide Indoor WiFi Hotspots   Dubai Metro WiFi …  On-Board all trains …  Covering all stations (Redline + Greenline) 4
  5. 5. DUBAI METRO: A CASE STUDYAward: The most innovativeMobility Project for 2009 by CISCO 5
  6. 6. DUBAI METROThe Dubai Metro project consists of two lines, i.e., Red line track (52.1 km) and Green Line (17.6 km). 6
  7. 7. DUBAI METRO: AN OVERVIEW TRAIN WiFi AP On-Board WiFi Controller du IP Core Network Stations 7
  8. 8. WHY WIMAX BACKHAULING 8
  9. 9. WiMAX Versus HSPA 9
  10. 10. Cell Radius Comparison between WiMAXat 2.6 GHz and HSPA at 2.1GHz •  Key Link Budget Parameters   HSxPA is mainly Downlink Limited …  Meeting the 512Kbps at cell edge is the main limiting factor …  Absolute minimum HSDPA percentage power to guarantee this throughput for a “single” user is 28%.   To leave room for more than one user to achieve this throughput at cell edge the following criteria is used in link budget: Comparable Cell Radius …  Percentage Power for HSxPABut HSxPA Cell Radius is sensitive to Loading as shown in = 35% the next 2 slides
  11. 11. Effect of Loading on HSPA Cell Radius•  Cell Breathing Phenomena: Cell Radius shrinks as a function of loading   Even becomes Uplink limited under very high loading and theoretically the cell radius goes to zero if uplink loading hit the 100%. Slide 11 | Broadband Wireless | January 2009
  12. 12. Supported 512Kbps users at cell Edge Vs. HSPA CellRadius •  HSxPA:   2x5MHz carriers   Carrier 1: …  30% R99 …  70% HSPA   Carrier 2: …  100% HSPA•  Cell Radius shrinks as a function of number of users at cell edge meeting the 512 Kbps Throughput   Only 6 users can achieve the throughput and the cell radius shrinks to 200 m only•  WiMAX can serve 8 users (512 Kbps) at cell edge with a cell radius of 450 m (no cell shrink in WiMAX) Slide 12 | Broadband Wireless | January 2009
  13. 13. Capacity Comparison per CellWiMAX using 10 MHz ChannelHSPA(+) using 2x5 MHz Carrier (10 MHz DL/10 MHz UL) i.e., 20MHz Average Throughput per Cell 13.44 14 13 12 10 8 8 Mbps Downlink 6 4.6 4 4 4 Uplink 2 0 HSPA HSPA+ WiMAX On cell basis, the WiMAX cell spectrum efficiency (1.744) is almost double theSlide 13 | Broadband Wireless | January 2009 of the HSPA+ cell (0.88). spectrum efficiency
  14. 14. Capacity Comparison per SiteWiMAX using 3x10 MHz Channels (30 MHz) (30 MHz with 1/1/3Frequency reuse)HSPA(+) using 2x5 MHz Carrier (20 MHz) Average Throughput per Site 45 40.32 39 40 35 Downlink 30 24 Mbps 25 Uplink 20 13.8 15 12 12 10 5 0 HSPA HSPA+ WiMAX On the site basis, the spectrum efficiency of WiMAX equal 1.73 while the HSPA+ is 2.64 and for WiMAX it will be even less if we considered the guardband but this could be equivalent to the noise floor rise in HSPA network
  15. 15. WiMAX Pros and Cons•  No cell breathing and therefore QOS can be guaranteed even at cell edge.•  TDD spectrum is cheaper than FDD spectrum.•  The ease of implementing the state-of-the-art techniques like MIMO and beamforming due to the Reciprocity of the RF propagation channels.•  Wide scale of QOS levels compared to HSPA technology.•  Same cell radius at 2.6 GHz compared to HSPA at 2.1 GHz thanks to MIMO and beamforming techniques.•  Flat architecture based on IP network and very high capacity ASN -GW. This leads to low latency; typically 50 to 60 ms.•  WiMAX network would be cheaper than HSPA network. This is mainly due to the need for 2/2/2 configuration of HSPA site to reach same capacity of 1/1/1 WIMAX site with 10MHz channel.•  Upon solving the issue of spectrum efficiency, the WiMAX technology will be an ideal 4G technology. 15
  16. 16. WiMAX Pros and Cons Cont…•  Since WiMAX is based on TDD then guardband between TDD & FDD is mandatory. Therefore, a network with 3x10MHz spectrum which deployed using 1/3/3 frequency reuse would need 5 to 10 MHz guradbands based on the vendor.•  The difficulty in implementing the network using frequency reuse of one similar to CDMA based technology.•  The above drawbacks has major impact on the spectrum efficiency.•  A feature called fractional frequency reuse is available with some vendors but not really tested in major deployment.•  Strict synchronization is needed and also with adjacent TDD operator to minimize or eliminate guardband requirement.•  Lack of dual mode handset which can support WiMAX along with 2G /3G technologies.•  The difficulty in expanding indoor DAS system to support above 2.5 GHz band. Therefore, the only way is to swap the passive system with active system to support higher frequency.•  Lack of real competition between the vendors due to the exit of major mobile vendors from the WiMAX market. 16
  17. 17. HSPA(+) Pros and Cons •  No need for guardband between adjacent operator and carrier leakage can be tackled since CDMA-based systems is capable of mitigating interference. •  The introduction of many new features like 64QAM in DL, MC-HSPA(+) and 16QAM in the UL has significantly improved the HSPA networks capacity. •  Also, the introduction of new features like VOIP over HSPA and CS over HSPA has increased the potential of HSPA in serving fixed customers due the noticeable voice capacity increase low CAPEX investment. •  Better spectrum efficiency thanks to frequency reuse one and robust interference mitigation inherited from CDMA nature. •  Wide availability of Smartphones and handsets. •  Cell breathing reduce coverage probability and reduce throughput at cell edge. •  Low QOS degrees and therefore HSPA networks suites the bursty traffic. •  High CAPEX investment due to the need for 2/2/2 configuration to increase the network capacity. •  some important features like MIMO are not compatible (i.e., degrade the performance) with legacy handset. 17
  18. 18. Thank You 18
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