Design considerations in a DVB network

Design considerations in a DVB network

Design considerations of a DVB network
Why certain choices were made
The right equipment, how about suppliers
Environmental issues, noise, power cooling, RF radiation
Opportunities and limitations; head ends, complex by design.
Eric Moerman
Curacao, june 15th
2010
Topics
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Network topology
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Business case
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Transport, contribution; legal, max. length, capacity, location encoder
Multiplexer, possibillities, statmux proces
Transport distribution; quality, capacity, management, reundancy.
Tranmitters
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Video transport(third party, RTL, premier league stadions)
Free-to-air
Subscriber options, smart card, VOD
Theme Channels, vb. football, adult channels
User end equipment, standardisation
Equipment properties
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DVB parameters; hiërarchical modulation, coverage versus radio network planning, SFN,
FEC, frequency coördination, capacity per multiplex, SD versus HD, mpeg2/4
Architecture; number of muxes, redundacy,
Environmental; power consumption, heat, sound
Physical lay-out; in building vs container
Building lead time and investment
Strategic options and demands.
Peripherals
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6 juni 2010
Availablity
Properties
MAD Technology
DVB-T network, high level topology
GPS
Uplink RTV
GPS
DVB-T Multiplexer
SDI
Studio feeds
SD 270Mb
HD 1,4Gb
SFN network
GPS
Distribution
Netwerk
SFN
MIP
GPS
23 TV, 20 Radio
ASI/P
Contribution
Network
Casis/Conax
Free/Conax
VOD file upload
(optional)
DVB-H Head-end
6 juni 2010
TV towers
MAD Technology
Modulation parameters versus SFN size
Modulatie
on
QPSK
16-QAM
64-QAM
6 juni 2010
Guard interval
Codering
1/4
1/8
1/16
1/32
1/2
4.976
5.529
5.855
6.032
2/3
6.635
7.373
7.806
8.043
3/4
7.465
8.294
8.782
9.048
5/6
8.294
9.216
9.758
10.053
7/8
8.709
9.676
10.246
10.556
1/2
9.953
11.059
11.709
12.064
2/3
13.271
14.745
15.612
16.086
3/4
14.929
16.588
17.564
18.096
5/6
16.588
18.431
19.516
20.107
7/8
17.418
19.353
20.491
21.112
1/2
14.929
16.588
17.564
18.096
2/3
19.906
22.118
23.419
24.128
3/4
22.394
24.882
26.346
27.144
5/6
24.882
27.647
29.273
30.160
7/8
26.126
29.029
30.737
31.668
Guard
interval
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Symbool
time
2k
mode
Distance
2k
mode
Symbol
time
8k
mode
Distance
8k
mode
1/32
7 µsec
2,1 km
28 µsec
8,4 km
1/16
14 µsec
4,2 km
56 µsec
16,8 km
1/8
28 µsec
8,4 km
112 µsec
33,6 km
1/4
56 µsec
16,8 km
224 µsec
67,2 km
RTL4
RTL5
RTL7
SBS6
NET5
Slam FM!
Radio 10Gold
Q-Music
CAZ!
Clasic FM
Sky Radio
Radio veronica
Spectrum comparison
Analog compared to digital
69
PAL-B versus DVB-T
Tele2 Voetbal 1
Tele 2 Voetbal 2/Planet prime
TMF
MTV
Animal Planet
CNN
BBC Prime
BBC World
BNR nieuwsradio
Arrow Classic rock
Radio 538
64
57
50
8 Mhz, In use for just one channel in
analog network
Nederland 1
Nederland 2
Nederland 3
Regionale TV
Radio 1
Radio 2
3FM
Radio 4
Radio 5
Radio 6
Concert zender
FunX
Radio regionaal
In digital network 15 a 20 mbit/s
Veronica/Jetix
per bouquet
Tien
Één
Canvas/ketnet
Nickelodeon/AT5
Discovery channel
Eurosport 1
Private Spice
24
21
6 juni 2010
MAD Technology
Transmitter network DVB-T/-H locations
Fase 1+2 locations:
Haarlem
Amsterdam Y
Amsterdam DC2
Hilversum
Wormer
Almere
Alphen
Oegstgeest
Den Haag
Scheveningen(GAP)
Naaldwijk
DelftGAP)
Gouda(GAP)
Rotterdam DC
Rotterdam Wilhelmin
Krimpen
Sliedrecht
Vlaardingen
Gorinchem(GAP)
Amersfoort
Maarsen
Utrecht
Lopik
6 juni 2010
DVB-H only locations
Woerden
Hillegom
Zoetermeer
Wijk aan Zee
Den Haag Kerk.
Volendam
Purmerend
Oostvoorne
Hellevoetsluis
Nw Bijerland
Dordrecht
Markelo
Fase 3 Locations:
Nijmegen,
Eindhoven 2
Smilde
Oss
Alkmaar
Lelystad
Zwolle
Groningen
Hengelo
Goes
Apeldoorn
Breda
Leeuwarden
Heerlen
Maastricht
Venlo
Den Bosch
Arnhem
Eindhoven 1
Enschede
Doetinchem
Den Haag II
Zoetermeer
Gouda
Fase 4 locations
Sittard
Roermond
Helmond
Loon op Zand
Roosendaal
Deventer
Den Burg
Enkhuizen
Hoorn
Veenendaal
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Coverage
• RF Topology
– High power high tower or multiple low power(5-40kW) low towers
• Low power – SFN needed.
• Calibration of planning tool necessary
• Tower lay-out, hight, antenna design(gain, azimuth)
• GAP fillers
• Customer antenna
– Diversity
– Indoor/outdoor antenna
– Active/passive antenna(power insertion)
6 juni 2010
MAD Technology
SFN networks
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Planning, tooling
Timing
Calibration
SFN gain
0-dB
SFN check, pixelmetrix
6 juni 2010
MAD Technology
Reception improvement
• Diversity reception
• Population “gain” 20%
6 juni 2010
MAD Technology
DVB Transmitters
• Power efficiency (actual measurement)
– Worst 9 %
– Best 22 %
• Modulation
– DVB-T 20 Mbit/s(equals max 8 Sd channels mpeg 2 in stat mux)
– DVB-T2 38 Mbit/s(equals 4 HD mpeg4 streams)
– Combined(hierarchical or standards) modulation ea DVB-H, HD etc
• Redundancy
• In building or container lay out
• Air cooled versus water cooled
6 juni 2010
MAD Technology
Electrical power and cooling
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ERP 100kW per multiplexer
Antenna, 8 to 10 layer
antenna gain 8 - 12 dB
cable and combiner loss. 1 - 3 dB
Required input power per multiplex 12 to 15 kW(net transmitter
ouput power)
Transmitter efficiency 12,5 - 25 %
Total consumed power per multiplex 48 - 120kW, (average coling
power 36 - 105 kW per mux)
In case of 4 muxes it totals to 200 - 480 kW per transmitter location
Secundaire equipment 10 - 30 kW
6 juni 2010
MAD Technology
Main drivers and performance (radio network)
• In general TV Tower and site build, especially the Construction- and
environmental effects permits, are limiting factor on lead times for TV station ‘onair’.
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Site acquisition for -in average- 120 meter height masts lead time 8 wks – 2 years
– Tranmitter system delivery including combiner and management systems
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Strong supplier dependancy
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Time between order and delivery on site
» Worst 13 month, best 2 month
– Transmission lines(glas) and power; average lead time 8 – 12 wks
Performance, overall lead times
– Fase I and II 2 – 3 years
– Fase III 9 – 20 month (21 locations) and
– Fase IV 7 – 10 month (10 locations) from formal “go” to commercial introduction
– Total staff involved 40 FTE average
6 juni 2010
MAD Technology
Comparison N+1 container deliveries
Total 2 month lead time to operational site
Supplier A
11-10-2007
1-11-2007 site ready
Container
22-10-2007
delivery 19-10-2007 29-10-2007
1-9-2007
Order
R&S install, 6 days
KPN install, 8 days
Test&commissioning 5 days
Acceptance 2 days
Total 6 month lead time to operational site planned
20-12-2006
agreed
delivery
schedule
Actual expected 10 weeks
Planned on site 5 weeks
Supplier B
19-3-2007
PO 2373292
3 month delay
30-4-2007
Initially
agreed
delivery
17-08-2007
Contractual
delivery date
Container
19-9-2007
Planned
operational
KPN installation, 2wk
16-10-2007
28-09-2007
Actual container
delivery
2 wk
Thomson Tx install, 1 wk
4 wk
Test 1 wk
3 wk
Acceptance 3 days
6 juni 2010
9-11-2007
21-12-2007
7-12-2007
14-12-2007
MAD Technology
planned
Transport
• Existing ATM networks proved not to be suitable for
uninterrupted video transport
• Microwave links troublesome during heavy rain and
snow
• Jitter, delay
• SDH-NG(next generation) over dark fiber was choosen
6 juni 2010
MAD Technology
The head end, a strong business
case enabler
• Head-end capable of processing 23 national TV, 14 regional TV and
in total 30 radio streams was taken into service. 14 separate
transport streams are generated
• Different services can be delivered in parallel.
• Full IP based, mpeg 2/4 capable for future options. Displaced
encoding techniques available including statcast.
• Statistical multiplexing applied on all streams.
• For SFN operation a redundant MIP inserter is available for every
stream
• Conax and casis integrated for pay tv and electronic program guides
6 juni 2010
MAD Technology
In building, Alkmaar
Combiner and cooling system
6 juni 2010
MAD Technology
In building, Alkmaar
Transmitter combiner/filters and Antenna Switching Field
6 juni 2010
MAD Technology
In building, Alkmaar
N+1 coaxial switching and cooling
6 juni 2010
MAD Technology
Container setup
Container pre-fab
R&S 5+1 2.6 kW per mux
(not ERP)
6 juni 2010
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Container setup(2)
6 juni 2010
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The inside of a container
6 juni 2010
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Some major components
Distribution
Antenna
Kathrein
6 juni 2010
Transmission backbone optimised
for streaming content
40Gbs, Netinsight
MAD Technology
Impression DVB-T Multiplexer Hilversum
6 juni 2010
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Local requests
6 juni 2010
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Local requests(2)
6 juni 2010
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Antenna design (Kathrein)
6 juni 2010
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Some items need planning ahead
In Europa no suitable crane is available.
A 2800 tons crane was shiped from Dubai
6 juni 2010
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Spare slides
6 juni 2010
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