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Maduf03 Access Network Coverage Aspects Wout Joseph

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Maduf03 Access Network Coverage Aspects Wout Joseph

  1. 1. Access network (WP3): coverage aspects Wout Joseph Hugo Gauderis David Plets Etienne Deventer Leen Verloock VRT Luc Martens Ghent University/IBBT
  2. 2. 2 Overview  Context and objectives  Characteristics of DVB-H system in Ghent  Coverage aspects  Coverage 1 transmitter  Wireless penetration for 100 buildings  Technical performance  Calculation of required number of transmitters  Conclusions
  3. 3. 3 Context and objectives   MADUF WP3: Access network   DVB-H: Digital Video Broadcasting- Handheld  EN 300 744 and EN 302 304   High data rate broadcast access for hand-held devices   Objectives   Coverage   Technical performance   Number of base stations for good indoor reception in Flanders
  4. 4. 4 Characteristics of DVB-H system   Single frequency network (SFN)   602 MHz   Channel bandwidth   8 MHz   3 base station (BS) antennas   Keizer Karel (BS1), Ledeganck (BS3), Groendreef (BS2)   hBS = 64 m, 63 m, 57 m   ERP = 6 kW, 7.5 kW, 2.8 kW
  5. 5. 5 Overview  Context and objectives  Characteristics of DVB-H system in Ghent  Coverage aspects  Coverage 1 transmitter  Wireless penetration for 100 buildings  Technical performance  Calculation of required number of transmitters for Flanders  Conclusions
  6. 6. 6 Coverage: 1 transmitter   BS: Keizer Karelstraat   Receiver Rx on Car  ERP = 5970 W  Rx: vertical polarisation  Height: 64 m  Speed: 25 km/h [ITU 1708] BS 2.85 m
  7. 7. 7 Coverage: Ghent   Equivalent electric field [dBµV/m]   hRx = 2.85 m   Range portable indoor (class B): 16-QAM 1/2, no MPE-FEC  3.2 km   Path loss model developed for Gent transmitter < 64.5 dBµV/m
  8. 8. 8 Overview  Context and objectives  Characteristics of DVB-H system in Ghent  Coverage aspects  Coverage 1 transmitter  Wireless penetration for 100 buildings  Technical performance  Calculation of required number of transmitters for Flanders  Conclusions
  9. 9. 9 Categories of houses   Penetration loss of 100 buildings in Ghent   Categories   Office building  Non coated (7)  Coated (2)   Apartment (7)   Station (1)   Villa / bungalow (17)   Mansion (15)   Terraced houses (51)  Private (44)  Shop (5)  Bank (2)
  10. 10. 10 Investigation of PenL   Penetration loss PenL [dB] = field outdoor / field indoor   PenL decreases for more radiated sides   PenLvilla < PenLmansion < PenLprivate house   Average value for PenL 8.10 dB   PenLcoated office building (21.94 dB) >> PenLnon-coated office building (5.30 dB)
  11. 11. 11 Overview  Context and objectives  Characteristics of DVB-H system in Ghent  Coverage aspects  Coverage 1 transmitter  Wireless penetration for 100 buildings  Technical performance  Calculation of required number of transmitters for Flanders  Conclusions
  12. 12. Investigated scenarios   Reception conditions: 9 scenarios   Portable reception   Outdoor walking (20 routes)   Indoor standing (13 buildings)   Indoor walking (13 buildings)   Mobile reception   Car 20 km/h (70.5 km)   Car 70 km/h (37.5 km)   Car 120 km/h (50 km)   Train   Tram   Bus   Several thousands of measurement points for each scenario
  13. 13. Investigated schemes  14 different settings  QPSK, 16-QAM, 64-QAM  MPE-FEC 67/68, 7/8, 5/6, 3/4, 2/3, 1/2  Inner code rate  1/2 and 2/3
  14. 14. 16-QAM 1/2 MPE-FEC 7/8, 4K, GI = 1/814 Example: car 20 km/h   Reception quality in Ghent in car driving at 20 km/h   Tables received   Correct: green   Corrected: orange   Incorrect: red
  15. 15. 16-QAM 1/2 MPE-FEC 7/8, 4K, GI = 1/8 Comparison of different scenarios   Higher C/(N+I) required for more difficult reception conditions most difficult reception   Higher speed conditions   Reception in trains   …
  16. 16. 16 Overview  Context and objectives  Characteristics of DVB-H system in Ghent  Coverage aspects  Coverage 1 transmitter  Wireless penetration for 100 buildings  Technical performance  Calculation of required number of transmitters for Flanders  Conclusions
  17. 17. Categories  Categories of base stations  Category 1: height = 35 m / ERP = 2 kW  Category 2: height = 60 m / ERP = 5 kW  Category 3: height = 150 m / ERP = 20 kW category 3 category 2 150 m, 20 kW category 1 60 m, 5 kW 35 m, 2 kW
  18. 18. Scenarios   Five scenarios   Coverage for Flanders, 35 m regional cities, and Brussels 2 kW   Scenario 1: 100 % category 1   2 kW, hBS = 35 m 60 m   Scenario 2: 100 % category 2 5 kW   5 kW, hBS = 60 m   Scenario 3: 100 % category 3 150 m   20 kW, 150 m 20 kW   Scenario 4: available antenna sites of VRT   Scenario 5: building additional medium infrastructure
  19. 19. #BS for scenarios   Indoor portable reception (class B) #BS   10 Mbps, reference receiver ETSI   16-QAM 1/2, MPE-FEC 7/8 scenario circle hexagon   #BS   Largest for scenario 1 1 816 986   Lowest for scenario 3   Higher for hexagons 2 274 332 than for circles   Realistic scenarios 4 and 5 3 47 65   High number of required BS 4 653 823   #BS for scenario 5 lower  Additional medium 5 563 733 infrastructure   Very sensitive to C/N
  20. 20. Conclusions  Coverage in Ghent  Coverage models have been developed  Wireless building penetration  Technical performance  Different reception scenarios  Different settings  Calculation of required number of BS for good indoor DVB-H coverage in Flanders for about 10 Mbps  Different categories of BS: low, medium, high  Very sensitive to C/N

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