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

The Channel Potential MethodThe Channel Potential Method

Dr. Roland Beutler GermanyDr. Roland Beutler Germany

Practical Considerations

Dr. Roland BeutlerFrequency Planning Department

September 2004

What do we want to achieve ?What do we want to achieve ?

generation of a pre-coordinated allotment plan in order togeneration of a pre-coordinated allotment plan in order to

i) efficiently use the spectrumi) efficiently use the spectrum

ii) facilitate the network implementation, i.e. re-use the network infrastructure

ii) facilitate the network implementation, i.e. re-use the network infrastructure

iii) achieve a high degree of mutual independence between adjacent countriesiii) achieve a high degree of mutual independence between adjacent countries

iv) assure as much compatibility as possible between analogue and digital servicesiv) assure as much compatibility as possible between analogue and digital services


September 2004

The Fundamental Assumptions of theChannel Potential Method

The Fundamental Assumptions of theChannel Potential Method

i) wave propagation is modelled in terms of ITU-R Rec.1546i) wave propagation is modelled in terms of ITU-R Rec.1546

ii) interference potential of allotments is based on reference networksii) 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 distancesiii) 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“iv) mixed paths can be accounted for in terms of „effective distances“

v) topographical shielding can be accounted for manuallyv) topographical shielding can be accounted for manually


September 2004

The Basic Steps of theChannel Potential Method


Given: a set of politically determined allotment areasGiven: a set of politically determined allotment areas


September 2004


Planning Area


Planning Area

To be taken into account:

- international boundaries

- topography

- wave propagation

To be taken into account:

- international boundaries

- topography

- wave propagation


September 2004


Definition of Allotment Areas


Definition of Allotment Areas

- allotment shapes determined by political conditions- allotment shapes determined by political conditions


September 2004




Starting Point: ST61 or GE89 assignments to be converted into allotmentsStarting Point: ST61 or GE89 assignments to be converted into allotments


September 2004




Starting Point: ST61 or GE89 assignments to be converted into allotmentsStarting Point: ST61 or GE89 assignments to be converted into allotments

Step 1: Interference limited contours for chosen channel Step 1: Interference limited contours for chosen channel


September 2004


Interference Contours


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

- 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


September 2004




Starting Point: ST61 or GE89 assignments to be converted to allotmentsStarting Point: ST61 or GE89 assignments to be converted to allotments


Step 2: Calculation of channel potential areas for each stationStep 2: Calculation of channel potential areas for each station


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Construction of Channel Potential Areas


Construction of Channel Potential Areas


September 2004







Step 3: Unification of channel potential areasStep 3: Unification of channel potential areas


September 2004


Unification of Channel Potential Areas


Unification of Channel Potential Areas


September 2004







Step 3: Unification of channel potential areasStep 3: Unification of channel potential areas

Step 4: Mapping of channels onto allotment areasStep 4: Mapping of channels onto allotment areas


September 2004


Mapping of Channels onto Allotment Areas


Mapping of Channels onto Allotment Areas


September 2004

An International Multi-Lateral Example

Aut, CH and D in Channel 29

An International Multi-Lateral Example

Aut, CH and D in Channel 29


September 2004

Some RemarksSome Remarks

• all available VHF/UHF channels are processed

selection of optimal frequency for considered allotment area

• all available VHF/UHF channels are processed

selection of optimal frequency for considered allotment area

• selection of starting set of transmitters : ERP > X kW

other criteria are possible as well

note : too many small stations prevent successful application

• 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• re-use distance must be adjusted to cope with sea paths

• topography can be considered• topography can be considered


September 2004

ConclusionConclusion

• channel potential areas are mutually compatible• channel potential areas are mutually compatible

• existing analogue assignments and new digital allotments are mutually compatible transition facilitated transition in adjacent countries decoupled

• 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• high flexibility when designing the channel potential areas and during the subsequent mapping of frequencies to allotment areas

• 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 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


September 2004

Thank you very muchfor your attention !

Questions?

Thank you very muchfor your attention !

Questions?

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

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