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BR/TSD
Dakar 2005
BCD Planning Software
25 – 29 April 2005Dakar
David Botha
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCD
Procedure for the production of a planCompatibility analysis and synthesis process
Analysis
Synthesis
Admin/BR
Admin/BR
BR/PXT
BR/PXT
Admin/BR/PXTAdmin/BR
Admin/BR/PXT
Admin.
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDCurrent status
Delivery of software
The EBU delivered:
1. Software for the:• Prediction of the service area of analogue television
assignments• Compatibility assessment of digital sound broadcasting
assignments and allotments• Compatibility assessment of digital television
assignments and allotments• Compatibility assessment:
• Mutually• Against existing and planned analogue television
broadcasting• Against existing and planned assignments to other
primary services • Coded in FORTRAN
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDCurrent status
Delivery of software continued
The EBU delivered:
2. Plan synthesis software for:• Digital sound and television broadcasting requirements
in band III• Digital television in band IV/V• Code in FORTRAN
3. Total package:• 77 source files resulting in 35 individual programs• 27 reference data files
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDCurrent status
Verification and testing
BR assisted by PXT to specify and perform tests on:
1. Basic software functionality:• Compile source code• Execute routines based on general data examples• Reporting errors and implement updates
2. Calculation verification:• Verification of basic propagation functionality• Compatibility assessment for simple cases• Synthesis results based on artificial problems
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDCurrent status
Verification and testing continued
BR assisted by PXT specify and perform tests on:
3. Planning test scenarios:• Software performance vs. system requirements• Results from analyses and syntheses• Variation of scenario parameters
4. Planning exercise scenarios:• Results from analyses and syntheses• Implementing different approaches to planning• Findings as input to IPG meeting
5. Report on testing and verification to be submitted to the first IPG meeting
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDCurrent status
Planning software: How does it work?
Input data:Reference situations
New digital BC requirements
Data conversion
Analogue TV assignment
services areas
Compatibility identificationCombination of analyses
Syntheses
VH
F a
nd U
HF
tre
ated
in p
aral
lel
and
inde
pend
ently
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDCurrent status
Planning software: How does it work? (continued)
Analyses
Data preprocessing
Syntheses:Different algorithms
Combination of resultsIdentification of “best” solutionV
HF
and
UH
F t
reat
ed in
par
alle
lan
d in
depe
nden
tly
Plan
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDAnalyses
Detailed overview
General steps:
1. Data preparation of:• Extracts of reference situations for broadcasting and
other primary services into text;• Requirements for digital broadcasting (assignments,
allotments for T-DAB and DVB-T) into text;• Conversion of text files into proprietary binary files.
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDAnalyses
Detailed overview continued
General steps continued:
2. Calculation of:• Service areas of analogue TV assignments• Service areas of digital broadcasting assignments
(equivalent service areas based on noise limited reduced by 3 dB);
• Incompatibilities identified pair-wise between digital broadcasting requirements mutually – cannot share the same channel;
• Incompatibilities identified pair-wise between digital requirements and existing and planned assignments - the relevant acceptable channels become not available;
• Incompatible when the protection margin on any test point and for any channel is less than –0.5 dB
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDAnalyses
Detailed overview continued
General steps continued:
3. Post processing of results:• Combining of incompatibility results of different cases;
• Analogue TV assignment Digital requirement• Digital requirement Analogue TV assignment• Digital requirement Digital requirement• Digital requirement Other primary service• Other primary service Digital requirement
• Consideration of administrative declarations• Preparation of files for bands III and IV/V separately.
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDSyntheses
Detailed overview
General steps:
1. Preprocessing of compatibility results:• Conversion of digital to digital requirement in compatibility
results into files;• Generation of lists of available channels as opposed to
acceptable channels;• Data prepared for each requirement;• Separate sets for bands III and IV/V.
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDSyntheses
Detailed overview continued
General steps continued:
2. Synthesizing frequency plans:• Search for solutions based on input data
and 49 channels in band IV/V and 67 combinations of channels overlapping in band III;
• Apply 230 individual ‘fast’ algorithms;• Software can treat 150 000 requirements in
band IV/V and 32 000 in band III;• Require 2 GB of random access memory.
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCD
Syntheses
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDSyntheses
Detailed overview continued
General steps continued:
3. Preparation of output data:• Generate combined list of all solutions
found for each algorithm;• Identify the ‘best’ solution as separate
output.
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDFurther development
Items to be considered for improvement/correction
General further development:
• Continued verification and testing;• Report errors to EBU;• Implement corrections and repeat testing;• Suggest improvements;• Implement and test improvements.
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCDFurther development
Items to be considered for improvement/correction
Specific further development:
• Extracting and publishing analysis results;• Method for treating administrative declarations
(compatibility and usable/unusable channels);• Extracting and publishing synthesis results;• Improvement in calculation speed;• Additional synthesis routines that improve
planning efficiency (longer calculation time);• Developing alternative synthesis methods, if the
number of requirements exceeds 32 000 (Band III) and 150 000 (Band IV/V).
Workshop for the African Group of Countries
BR/TSD
Dakar 2005
BCD
Thank youMerci
Workshop for the African Group of Countries