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ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia
+61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Digital BroadcastingNetwork Design and Analysis
2011. 05. 23
ITU-AIBD-ABU Regional workshop
22-23 May 2011 – Hanoi
Pascal GELUGNE - Managing Director ATDI South Pacific
pgelugne@atdi.com
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
AgendaAgenda
Selecting a Digital Broadcasting Technology
Planning the migration: the coverage aspects- Planning standards and requirements - The simulation parameters- The “same” coverage objective
Planning the migration: the spectrum aspects- MFN network planning- SFN network planning- The Digital dividend - Compatibility between services
International coordination- Coverage outside borders- Working with the ITU
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
Selecting a Digital Broadcasting TechnologySelecting a Digital Broadcasting Technology
• What digital system to select ? (DVB-T, DVB-T2, DVB-S, DVB-H, ISDB-T, T-DMB …)
o What is the targeted market ?
Replacement for Analogue
Outdoor or Indoor Rx antennas ?
Mobile users ?
o What are the technologies performances ?
Selection processSelection process
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
Selecting a Digital Broadcasting TechnologySelecting a Digital Broadcasting Technology
Technical investigations: Using the power of a planning tool
Technical investigations: Using the power of a planning tool• ISDB-T vs DVB-T2 at equivalent payload:
o Simulation using ICS telecom, 25m
cartographic data and a
deterministic model
o DVB-T2 has a 30.9% coverage
increase in this example
o At equal coverage it would mean an
economy of 4 times the Tx power
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
Selecting a Digital Broadcasting TechnologySelecting a Digital Broadcasting Technology
Technical investigations: Validating the Tx modesTechnical investigations: Validating the Tx modeso What compression
standard ?
o Set the transmission
standards (Carrier
mode, Guard interval,
modulation, code
rate)
o Set the reception
parameters
(Outdoor/Indoor,
receiving threshold
standard) Source: ETSI TR 101 190
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
AgendaAgenda
Selecting a Digital Broadcasting Technology
Planning the migration: the coverage aspects- Planning standards and requirements - The simulation parameters- The “same” coverage objective
Planning the migration: the spectrum aspects- MFN network planning- SFN network planning- The Digital dividend - Compatibility between services
International coordination- Coverage outside borders- Working with the ITU
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Know your network parameters: general
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
Simulation parametersSimulation parameters
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Know your network parameters: patterns
The patterns can be easily imported from standard formats (NSMA, Planet©, excel©…).
The azimut, tilt, polarization, XPD can be easily defined.
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
Simulation parametersSimulation parameters
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Know your network parameters: parameters dedicated to the DVB signal
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
Simulation parametersSimulation parameters
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
ICS telecom manages cartographic layers that are necessary for the propagation calculation and display.
Digital cartographic data: medium resolution
DTM Imagery Clutter Census data
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
Simulation parametersSimulation parameters
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Which propagation model ?Planning purposes: Deterministic methods
If a proper cartography is used (and it is less a problem to find it in many countries today), the simulation will be realistic. The simulation can also be compared to a measurement campaign for validation.
– LOS
– Diffraction (NLOS)
– Subpath/Multipath attenuation (nLOS)
Note that empirical methodologies are also available, but usually dedicated to cellular technologies.
Regulation purposes
These models are based upon propagation curves following very strict rules (frequency range, Rx antenna height…). They are NOT made to be accurate (and cannot be tuned), but can be used to exchange coordination contours whatever the planning tool and the cartographic data used.
– ITU-R P.370
– ITU-R P.1546
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
Simulation parametersSimulation parameters
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Which propagation model ?
ITU-R P.1546 for DVB planning ?
– defined for an Rx antenna height of 10m: a height conversion factor used to used
– to be used with effective antenna height that are not sensitive to cartography
– cannot be tuned unless failing the ITU compliancy
– limited in close range environment
The 1546 is perfect for what is made for: coordination. It can be used whatever the tool and the cartography used, and the direct consequence is its lack of accuracy.
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
Simulation parametersSimulation parameters
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
The viewer of an analogue signal is ready to “tolerate” a reception that is not perfect. In digital, the switch point between “bad” and “good” is almost immediate.
Grade Decription of the impairment
5 Imperceptible4 Perceptible, but not annoying3 Slightly annoying2 Annoying1 Very annoying
Grade Decription of the impairment
5 Imperceptible4 Perceptible, but not annoying3 Slightly annoying2 Annoying1 Very annoying
The same coverage objectiveThe same coverage objective
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
The coverage can be compared with a map of the collection districts, where the number of inhabitants is known.
This analysis can be done:
– in point mode (centroids)
– in area mode linear distributed
– in area mode distributed according to the clutter
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
The same coverage objectiveThe same coverage objective
Ensure that the digital service provides « same coverage » as the analogue service:
Both services must be modelled in the planning tool considering:
– The right frequency for each service
– The right min required FSR for each service
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
DTV 60W ERP 54dBµV/m only
Analogue 400W ERP 64dBµV/m only
Reception of both signals
The propagation model takes the suburban/urban attenation into account.
The directivity of the Rx can be taken into account.
DTV - Band V Analogue - Band V
Rural 54 64
Suburban 67 73
Urban 74 77
Median field strengthE(50,50)dBµV/m
Planning the migration: the coverage aspectsPlanning the migration: the coverage aspects
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
AgendaAgenda
Selecting a Digital Broadcasting Technology
Planning the migration: the coverage aspects- Planning standards and requirements - The simulation parameters- The “same” coverage objective
Planning the migration: the spectrum aspects- MFN network planning- SFN network planning- The Digital dividend - Compatibility between services
International coordination- Coverage outside borders- Working with the ITU
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
In order to provide coverage, two conditions must be respected:
– Enough signal strength C should be provided
– This signal must be a certain number of dB higher than the noise floor N of the Rx C/N ratio. Interference will generate a raise of the noise floor, and therefore a decrease of the C/N: C/N+I
Digital broadcast can work in different spectrum modes:
– Multiple frequency networks: MFN
– Single frequency networks: SFN
– A mixture of both: several SFNs working in MFN one with each other for instance
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
The SFN network planningThe SFN network planningo Tx1 coverage only
o Flat Earth
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
The SFN network planningThe SFN network planningo Tx1 coverage only
o Terrain model
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
The SFN network planningThe SFN network planningo Tx1 coverage only
o Terrain model
o Clutter model
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
The SFN network planningThe SFN network planningo Tx2 coverage only
o Terrain model
o Clutter model
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
The SFN network planningThe SFN network planningo TX1 + Tx2 coverage
o Terrain model
o Clutter model
o Non optimised SFN timings (-100 µs)
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
The SFN network planningThe SFN network planningo TX1 + Tx2 coverage
o Terrain model
o Clutter model
o Non optimised SFN timings (0 µs)
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
The SFN network planningThe SFN network planningo TX1 + Tx2 coverage
o Terrain model
o Clutter model
o Optimised SFN timings (49 µs)
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Planning the migration: the spectrum aspectsPlanning the migration: the spectrum aspects
The Digital dividendThe Digital dividendATDI re-assigned Belgium DTV spectrum by :
• Calculating the coverage maps of the existing assignments
• Using the C/N+I ratio defined in the ITU Rec 1368 (DVB-T vs DVB-T…) 15dB
• Without using channels 56-69 (112MHz) = Digital Dividend
Constraints for this work:
• All channels had to be
re-assigned!!!
• The foreign
neighboring countries
were not taken into
account.
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
The spectrum compatibility is checked by ensuring:
- That the analogue network is not interfered by the introduction of the DVB network
(using C/I DVBAnalogue protection ratios)
- That the DVB network introduced is not interfered by the analogue network
(using C/I AnalogueDVB protection ratios)
Compatibility with existing servicesCompatibility with existing services
Interference calculationInterference calculation
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Compatibility with existing servicesCompatibility with existing services
Impact on existing servicesImpact on existing servicesRadio-planning a compatibility requires the use of detailed protection from a service A into a service B, and from a service B into a service A.
DTV wanted coverage DTV wanted coverage area once adjacent channel DAB transmitter is setup
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
AgendaAgenda
Selecting a Digital Broadcasting Technology
Planning the migration: the coverage aspects- Planning standards and requirements - The simulation parameters- The “same” coverage objective
Planning the migration: the spectrum aspects- MFN network planning- SFN network planning- The Digital dividend - Compatibility between services
International coordination- Coverage outside borders- Working with the ITU
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
International coordinationInternational coordination
Coverage outside bordersCoverage outside borders
Maximum value Station azimuth distance H1 (Wien) H1 (Geneva) Country86 1 268.07 11908 145.04 153.27 LAO87 1 268.95 10902 175.32 180.53 VTN
Calculation of the coverage spill over the borders
- According to international agreements
- Automatic computation of the countries to be
notified
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Cartographic Data Production
International coordinationInternational coordination
Notification and coordination are never so simple
International agreements
Working with the ITUWorking with the ITU
ICAO
IALA Vienna
Wiesbaden
Chester
BT/BCST’61GE’84GE’89GE’06
LF/MF BCGE’75RJ ’81RJ ’88
MaritimeAeronauticalGE’85MGE’85N
Regional agreements:• FACSMAB• …
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia +61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
ATDI South Pacific Pty Ltd79 Macarthur Street - Ultimo NSW 2007 Australia
+61 (0)2 9213 2200 Fax +61 (0)2 9213 2299 email south-pacific@atdi.com
Thank you!Cảm ơn!
ATDI South Pacific
Pascal GELUGNE - Managing Director ATDI South Pacific
pgelugne@atdi.com
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