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Conversion of Analogue Assignments into Digital Allotments

Conversion of Analogue Assignments into Digital Allotments. The Channel Potential Method. Dr. Roland Beutler Germany. Dr. Roland Beutler Frequency Planning Department. September 2004. Basic Aspects of Frequency Planning for Digital Terrestrial Broadcasting.

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Conversion of Analogue Assignments into Digital Allotments

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  1. Conversion of Analogue Assignments into Digital Allotments The Channel Potential Method Dr. Roland Beutler Germany

  2. Dr. Roland Beutler Frequency Planning Department September 2004 Basic Aspects of Frequency Planning for Digital Terrestrial Broadcasting Frequency plan generation is based on - set of input requirements submitted by national administrations ( political constraints, national legislation, etc. ) - adopted planning approaches and methods ( lattice/non-lattice, assignments/allotments, etc. ) - adopted set of technical parameters ( minimum field strengths, protection ratios, etc. ) - adopted wave propagation model(s) ( land/cold sea/warm sea, superrefractivity, etc. )

  3. Dr. Roland Beutler Frequency Planning Department September 2004 Assignment- and Allotment-Requirements Assignment-Requirements „transmitter oriented“ Allotment-Requirements „service area oriented“ - given a planning stage: technical characteristics ( location, erp, antenna, ... ) - given a planning stage: service area interference potential - after planning process assigned frequency shape and size of service area - after planning process assigned frequency network implementation

  4. Dr. Roland Beutler Frequency Planning Department September 2004 Coverage Targets • Wide area coverage, regional or local coverage, urban coverage • Possible reception modes are fixed, portable (indoor/outdoor) and • mobile • DVB-T and T-DAB allow for several operation modes giving rise to • different data capacities • robustness against negative transmission impacts • ruggedness against interfereing signals • DVB-T and T-DAB allow different transmitter network structures • to be employed ( SFN/MFN )

  5. Dr. Roland Beutler Frequency Planning Department September 2004 Fundamental Possibilities to Generate Input Requirements to the RRC06 There are three basic strategies to generate input requirements - free design of assignments or allotments

  6. Dr. Roland Beutler Frequency Planning Department September 2004 Fundamental Possibilities to Generate Input Requirements to the RRC06 free design of allotments • generation of allotment polygons according to • given political constraints

  7. Dr. Roland Beutler Frequency Planning Department September 2004 Fundamental Possibilities to Generate Input Requirements to the RRC06 free design of allotments • generation of allotment polygons according to • given political constraints • - frequency assignment by synthesis algorithm

  8. Dr. Roland Beutler Frequency Planning Department September 2004 Fundamental Possibilities to Generate Input Requirements to the RRC06 free design of allotments • generation of allotment polygons according to • given political constraints • frequency assignment by synthesis algorithm • compatibility problems with existing analogue • services like analogue TV, • network implementation blocked

  9. Dr. Roland Beutler Frequency Planning Department September 2004 Fundamental Possibilities to Generate Input Requirements to the RRC06 There are three basic strategies to generate input requirements - free design of assignments or allotments - transmitter-by-transmitter based conversion of existing entries in ST61 or GE89 ( conversion rules similar to Chester 97 )

  10. Dr. Roland Beutler Frequency Planning Department September 2004 Fundamental Possibilities to Generate Input Requirements to the RRC06 transmitter-by-transmitter conversion of assignments • digital requirements are derived by • selecting set of transmitters and • applying conversion rules • frequency is kept fixed

  11. Dr. Roland Beutler Frequency Planning Department September 2004 Fundamental Possibilities to Generate Input Requirements to the RRC06 transmitter-by-transmitter conversion of assignments • digital requirements are derived by • selecting set of transmitters and • applying conversion rules • frequency is kept fixed • compatibility between analogue • and digital assignments • fixed analogue areas ~ portable • outdoor areas •  less efficient usage of spectrum

  12. Dr. Roland Beutler Frequency Planning Department September 2004 Fundamental Possibilities to Generate Input Requirements to the RRC06 There are three basic strategies to generate input requirements - free design of assignments or allotments - transmitter-by-transmitter based conversion of existing entries in ST61 or GE89 ( conversion rules similar to Chester 97 ) - conversion of analogue assignments into digital allotments ( channel potential method )

  13. Dr. Roland Beutler Frequency Planning Department September 2004 The Channel Potential Method • Target:generation of an allotment plan (wide area cov.) such that • i) spectrum is efficiently used • ii) network implementation is facilitated, i.e. network • infrastructure can be re-used • iii) a high degree of mutual independence between adjacent • countries is achieved • iv) as much compatibility as possible between analogue and • digital services is assured - Starting point:assignments of ST61 or GE89 • Method: i) geometrical construction of areas of potential channel usage • ii) extend these areas to the maximum • iii) simultaneous processing of all channels - Basis: protection criteria of typical DVB-T modes (RU~120km)

  14. Dr. Roland Beutler Frequency Planning Department September 2004 The Channel Potential Method Step 1: Selection of analogue stations • selection criterion: • erp > X kW • selection amended by • choosing additional • distinct transmitters

  15. Dr. Roland Beutler Frequency Planning Department September 2004 The Channel Potential Method Step 2: Calculation of interference limited contours • calculation based on • ITU-R. Rec. 1546

  16. Dr. Roland Beutler Frequency Planning Department September 2004 The Channel Potential Method Step 3: Calculation of individual channel potential areas • geometrical construction • of channel potential areas • taking into account: • re-use distance • land / sea propagation • topographic schielding - channel potential areas correspond to areas where channel can be used without further coordination

  17. Dr. Roland Beutler Frequency Planning Department September 2004 The Channel Potential Method Step 4: Assignment of channels onto allotment areas • channel potential areas • correspond to raw • material for channel • assignment • coordination with • neighbors may be • necessary

  18. Dr. Roland Beutler Frequency Planning Department September 2004 The Channel Potential Method Step 5: Combination of individual channel potential areas • individual channel • potential areas can be • combined on a national • basis • channel can be used • throuhgout entire • area without further • coordination

  19. Dr. Roland Beutler Frequency Planning Department September 2004 The Channel Potential Method Step 6: Flexible usage of channel potential areas (I) • additional allotments can • be added

  20. Dr. Roland Beutler Frequency Planning Department September 2004 The Channel Potential Method Step 6: Flexible usage of channel potential areas (II) • totally new allotments • can be designed on the • basis of the channel • potential areas

  21. Dr. Roland Beutler Frequency Planning Department September 2004 Summary of Basic Features of the Channel Potential Method • channel potential method can be used to • - identify areas where frequencies could be used • - assist the preparation of input requirements • - coordinate the usage of frequencies between countries • channel potential areas are mutually compatible • existing analogue assignments and new digital allotments are • mutually compatible •  transition facilitated •  transition in adjacent countries decoupled • high flexibility when designing the channel potential areas and • the subsequent mapping of frequencies onto allotment areas

  22. Dr. Roland Beutler Frequency Planning Department September 2004 Coordination Activities based on the Channel Potential Method • since approx. twoyears multilateral coordination meetings in Europe • participants : Sweden, Poland, Czech Republic, Austria, Switzerland • France, Belgium, Luxemburg, Netherlands and Germany • preparation of an all digital allotment plan for DVB-T and T-DAB on • the basis of the channel potential method • currently six wide-area national DVB-T coverages in UHF, • further regional or local coverages, one DVB-T coverage in VHF and up • to three coverages for T-DAB in VHF • target: submission of pre-coordinated requirements for the RRC06

  23. Dr. Roland Beutler Frequency Planning Department September 2004 Current Planning Status UHF-Layer 1

  24. Dr. Roland Beutler Frequency Planning Department September 2004 Current Planning Status UHF-Layer 2

  25. Dr. Roland Beutler Frequency Planning Department September 2004 Current Planning Status UHF-Layer 3

  26. Dr. Roland Beutler Frequency Planning Department September 2004 Current Planning Status UHF-Layer 4

  27. Dr. Roland Beutler Frequency Planning Department September 2004 Current Planning Status UHF-Layer 5

  28. Dr. Roland Beutler Frequency Planning Department September 2004 Current Planning Status UHF-Layer 6

  29. Dr. Roland Beutler Frequency Planning Department September 2004 Current Planning Status VHF-Layer

  30. Dr. Roland Beutler Frequency Planning Department September 2004 Thank you very much for your attention ! Part 2 in the afternoon

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