Maduf03 Access Network Coverage Aspects Wout Joseph

Access network (WP3): coverage aspects Wout Joseph Hugo Gauderis David Plets Etienne Deventer Leen Verloock VRT Luc Martens Ghent University/IBBT

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 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 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 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 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 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

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 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)

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

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

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

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  …

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

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

#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

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

Maduf03 Access Network Coverage Aspects Wout Joseph

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Maduf03 Access Network Coverage Aspects Wout Joseph — Presentation Transcript

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