The Channel Potential Method

1. The Channel Potential Method Practical Considerations Dr. Roland Beutler Germany

2. Dr. Roland Beutler Frequency Planning Department September 2004 What do we want to achieve ? generation of a pre-coordinated allotment plan in order to i) efficiently use the spectrum ii) facilitate the network implementation, i.e. re-use the network infrastructure iii) achieve a high degree of mutual independence between adjacent countries iv) assure as much compatibility as possible between analogue and digital services

3. Dr. Roland Beutler Frequency Planning Department September 2004 The Fundamental Assumptions of the Channel Potential Method i) wave propagation is modelled in terms of ITU-R Rec.1546 ii) interference potential of allotments is based on reference networks iii) compatibility analysis between allotments can be carried out by applying the concept of re-use distances iv) mixed paths can be accounted for in terms of „effective distances“ v) topographical shielding can be accounted for manually

4. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Given: a set of politically determined allotment areas

5. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Planning Area • To be taken into account: • international boundaries • topography • wave propagation

6. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Definition of Allotment Areas • allotment shapes determined • by political conditions

7. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Given: a set of politically determined allotment areas Starting Point: ST61 or GE89 assignments to be converted into allotments

8. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Given: a set of politically determined allotment areas Starting Point: ST61 or GE89 assignments to be converted into allotments Step 1: Interference limited contours for chosen channel

9. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Interference Contours • choose particular VHF or UHF • channel (here: ch. 22) • properly choose a set of stations • according to e.r.p. • (i.e. e.r.p > x kW) • - calculate interference limited • coverage contours

10. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Given: a set of politically determined allotment areas Starting Point: ST61 or GE89 assignments to be converted to allotments Step 1: Interference limited contours for chosen channel Step 2: Calculation of channel potential areas for each station

11. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Construction of Channel Potential Areas

12. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Construction of Channel Potential Areas

13. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Construction of Channel Potential Areas

14. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Construction of Channel Potential Areas

15. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Construction of Channel Potential Areas

16. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Construction of Channel Potential Areas

17. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Construction of Channel Potential Areas

18. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Given: a set of politically determined allotment areas Starting Point: ST61 or GE89 assignments to be converted to allotments Step 1: Interference limited contours for chosen channel Step 2: Calculation of channel potential areas for each station Step 3: Unification of channel potential areas

19. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Unification of Channel Potential Areas

20. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Given: a set of politically determined allotment areas Starting Point: ST61 or GE89 assignments to be converted to allotments Step 1: Interference limited contours for chosen channel Step 2: Calculation of channel potential areas for each station Step 3: Unification of channel potential areas Step 4: Mapping of channels onto allotment areas

21. Dr. Roland Beutler Frequency Planning Department September 2004 The Basic Steps of the Channel Potential Method Mapping of Channels onto Allotment Areas

22. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

23. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

24. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

25. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

26. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

27. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

28. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

29. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

30. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

31. Dr. Roland Beutler Frequency Planning Department September 2004 An International Multi-Lateral Example Aut, CH and D in Channel 29

32. Dr. Roland Beutler Frequency Planning Department September 2004 Some Remarks • selection of starting set of transmitters : ERP > X kW •  other criteria are possible as well • note : too many small stations prevent successful application • re-use distance must be adjusted to cope with sea paths • topography can be considered • all available VHF/UHF channels are processed •  selection of optimal frequency for considered allotment • area

33. Dr. Roland Beutler Frequency Planning Department September 2004 Conclusion • channel potential methods 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 • during the subsequent mapping of frequencies to allotment areas

34. Dr. Roland Beutler Frequency Planning Department September 2004 Thank you very much for your attention ! Questions?