Access network (WP3): coverage aspects Hugo Gauderis Etienne Deventer VRT Wout Joseph David Plets Leen Verloock Luc Martens Ghent University/IBBT
Access network (WP3): coverage aspects
Hugo Gauderis Etienne Deventer VRT
Wout Joseph David Plets Leen Verloock Luc Martens Ghent University/IBBT
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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
Overview
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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
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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
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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
Overview
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Coverage: 1 transmitter
Receiver Rx on Car Rx: vertical polarisation Speed: 25 km/h [ITU
1708]
BS
BS: Keizer Karelstraat ERP = 5970 W Height: 64 m
2.85 m
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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
< 64.5 dBµV/m
transmitter
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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
Overview
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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)
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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)
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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
Overview
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
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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
Higher C/(N+I) required for more difficult reception conditions
Higher speed Reception in trains …
16-QAM 1/2 MPE-FEC 7/8, 4K, GI = 1/8
Comparison of different scenarios
most difficult reception conditions
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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
Overview
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 1 35 m, 2 kW
category 2 60 m, 5 kW
category 3 150 m, 20 kW
Scenarios
Five scenarios Coverage for Flanders,
regional cities, and Brussels Scenario 1: 100 % category 1
2 kW, hBS = 35 m Scenario 2: 100 % category 2
5 kW, hBS = 60 m Scenario 3: 100 % category 3
20 kW, 150 m Scenario 4: available antenna
sites of VRT Scenario 5: building additional
medium infrastructure
35 m 2 kW
60 m 5 kW
150 m 20 kW
#BS for scenarios Indoor portable reception (class B)
10 Mbps, reference receiver ETSI 16-QAM 1/2, MPE-FEC 7/8
#BS Largest for scenario 1 Lowest for scenario 3 Higher for hexagons
than for circles Realistic scenarios 4 and 5
High number of required BS #BS for scenario 5 lower
Additional medium infrastructure
Very sensitive to C/N
#BS
scenario circle hexagon
1 816 986
2 274 332
3 47 65
4 653 823
5 563 733
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