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Regional Information Meeting and Workshop related to the RRC-06 for the administrations of the African countries Dakar, Senegal, 25-29 April 2005 Working.

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Presentation on theme: "Regional Information Meeting and Workshop related to the RRC-06 for the administrations of the African countries Dakar, Senegal, 25-29 April 2005 Working."— Presentation transcript:

1 Regional Information Meeting and Workshop related to the RRC-06 for the administrations of the African countries Dakar, Senegal, 25-29 April 2005 Working assumptions for the first planning exercise Pham Nhu Hai Radiocommunication Bureau

2 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Outline Why working assumptions? Working assumptions for broadcasting services Working assumptions for other services What next?

3 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Why working assumptions? Some parameters of analogue assignments are not available –Not required (ST61) Some planning criteria (protection ratios) are not available in current recommendations

4 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Sources of assumptions Planning exercise team (PXT) Working parties –WP6E –WP8B –WP9B Regional groups IPG-STG

5 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 How are they used? First planning exercise only Submitted to IPG first meeting in July 2005 for its approval and advice for subsequent planning activities

6 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Working assumption 1 -BC Protection ratios for the broadcasting service are incomplete in the RRC-04 Report. –For many DVB-T system variants Use protection ratios approved by ITU working parties

7 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Working assumption 2 - BC Protection ratios between T-DAB and DVB-T are incomplete particularly for certain amounts of overlap. Any cases of a partial overlap (larger than 1MHz) are treated as a complete overlap

8 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Working assumption 3 - BC A number of analogue broadcasting assignments in the ST61 plan and MIFR do not have effective height values at all 36 azimuths. Use the value of the maximum effective height for all directions where the concerned value is not provided.

9 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Working assumption 4 - BC Criteria for protection of DVB-T from different systems in the radionavigation and aeronautical radionavigation services are missing. No working assumption formulated yet (still under discussion within WP6E).

10 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Working assumption 5 - BC Coincident or close located co- channel TV stations result in a very small coverage area. Assume coverage area radii of 1 km. Concerned administrations may need to be consulted.

11 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Working assumption 6 - BC Reference network characteristics as given in the RRC Report (Annex 3.7) are frequency independent. ERP for different reference networks specified in the RRC 04 Report are given only for 200 MHz in band III and 650 MHz in band IV and V. Use frequency scaling for other frequencies.

12 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Some OS working assumptions MIFR does not contain effective height values for transmitting stations of primary Other Services. effective antenna heights : –aircraft station in the aeronautical radionavigation service: 10 000 m –land station in the aeronautical radionavigation service: 37.5 m; –station in the fixed service: 37.5 m; –base station in the land mobile service : 37.5m

13 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Some more… The information about receiving antenna heights is not kept in the MIFR Receiving antenna heights: –aircraft station in the aeronautical radionavigation service: 10 000 m; –station in the fixed service: 10 m; –base station in the mobile service: 20 m; –mobile station in the mobile service: 1.5 m.

14 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 More OS… Some parameters of assignments for fixed services may be missing or incorrect. It is assumed that: –if the beam width is narrower than the calculated beam width by more than 10 degrees, then use the calculated beam width; –if the azimuth of the maximum radiation is different from the calculated azimuth by more than 3 degrees, then use the calculated azimuth (this assumes that the geographical coordinates are correct). –Antenna is considered to be non-directional if the antenna gain is less than 3.7 dB.

15 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 More OS… For some fixed services where transmitting and receiving locations are separated by large distances, more than 300 km and up to 1200 km For the first planning exercise, the notified values will be used. The concerned administrations will be consulted if these assignments are submitted for inclusion in the reference situation. (ARS, COD, EGY, F, G, GRC I, IRN, ISL, LBY, MOZ, NOR, OMA, POR, TJK, TUR, TZA)

16 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 OK! last one … Service type codes for primary Other Services may not be submitted by administration concerned. To use generic type codes only if administrations do not provide this information and if it is not possible to associate an assignment with a specific service type code.

17 RRC information meeting and workshop Dakar, Senegal 25-29 April 2005 Conclusions Working assumptions necessary to carry out the planning exercise To be submitted to IPG for guidance Assumptions may need revised for the production of the draft plan Please study them and submit input as appropriate to IPG (4-8 July 2005)

18 Thanks for your attention!


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