Regional Radiocommunication Seminar Jeju, Korea 2003

1
Regional Radiocommunication SeminarJeju, Korea -
2003
COORDINATION PROCEDURE for EARTH STATIONS (AP 7
BRs Assistance)
Dong-Sik KIM Dong-sik.kim_at_itu.int Space Service
Department Radiocommunication Bureau
2
Introduction
NEED FOR COORDINATION
Article 6 of the Constitution of the
Union Provides, among other things, that all
administrations are bound to abide by the
provisions of CS/CV/RR when the
radiocommunication stations operated by them are
capable of causing harmful interference to radio
services of other countries. Basic provisions of
Radio Regulations Articles 5, 7, 8, 9,11
Appendixes 4,5, and 8 CS Constitution CV
Convention RR Radio Regulations

3
COORDINATION OF EARTH STATIONS WITH RESPECT TO
TERRESTRIAL STATIONS AS WELL AS EARTH STATIONS

• When ?
• Frequency bands allocated with equal rights to
  space and terrestrial services or earth stations
  operating in the opposite direction of
  transmission

Article 5
All Regions ___________________ 6700 - 7075
MHz FIXED FIXED-SATELLITE (Earth-to-space)
(space-to-Earth) MOBILE
Region 1 ___________________ 5850 - 5925
MHz FIXED FIXED-SATELLITE (Earth-to-space)
MOBILE

• The coordination area includes the territory of
  another country

4
PART I
PROVISIONS RELATED TO COORDINATION OF EARTH
STATIONS

• Article 5
• Article 9
• Article 11

(Volume 1 of the RR)

• Appendix 4
• Appendix 5
• Appendix 7

(Volume 2 of the RR)
5
PROVISIONS FOR EFFECTING COORDINATION
Article 9 of the Radio Regulations

• 9.6
• Before an Administration notifies to BR or
  brings into use any frequency assignment of the
  cases listed below (9.7 - 9.21), it shall effect
  coordination, as required, with other
  administrations identified under 9.27.
• 9.17
• 9.17A
• 9.11A 9.15

6
PROVISIONS 9.11A / 9.15
Coordination of a Specific or Typical Earth
Station of non-GSO in respect of Terrestrial
Stations
Footnote 5.389A The use of this frequency band
by mobile satellite service is subject to
coordination under 9.11A.
7
PROVISION 9.17
9.17 Coordination of any Specific earth station
or Typical Mobile Earth Station in respect of
Terrestrial Stations, in frequency bands above
100 MHz with the exception of the coordination
under 9.15
Region 1 ___________________ 5850 - 5925
MHz FIXED FIXED-SATELLITE (Earth-to-space)
MOBILE
B
A
EARTH STATION
Coordination area
8
PROVISION 9.17A
All Regions ___________________ 6700 - 7075
MHz FIXED FIXED-SATELLITE (Earth-to-space)
(space-to-Earth) MOBILE
9.17A Coordination of any specific earth station
in respect of other Earth Stations operating in
the opposite direction of transmission in
frequency bands allocated with equal rights to
space service in both directions of transmission
B
Rx EARTH STATION

A
Tx. EARTH STATION
9
PART II
COORDINATION AREA TECHNICAL CONCEPT
WITHIN THE COORDINATION AREA
Terrestrial Stations or Earth Stations operating
in opposite directions of transmission are likely
to receive interference from the earth station or
to cause interference to the earth station, above
the permissible level.

B

Receiving earth station
EARTH STATION
A
Coordination area
10
COORDINATION AREA TECHNICAL CONCEPT
OUTSIDE THE COORDINATION AREA
The level of permissible interference will not
be exceeded Most unfavourable case
assumptions is adapted for the calculation
of interference
B
A
11
COORDINATION AREA ADMINISTRATIVE CONCEPT
WITHIN THE COORDINATED AREA The earth station has
the right to operate with its coordinated
characteristics and at the level of agreed
interference
B
A
EARTH STATION
Coordination Area is not an exclusion zone,
but a means for determining the area of more
detailed calculations.
12
Coordination data
Annex 2A to Appendix 4

• GEOGRAPHICAL DATA Location, Altitude
• SATELLITE Location, Identification
• (Geo, Non-Geo)
• ANTENNA Max. gain, Radiation pattern
• OTHER CHARACTERISTICS
• Power, Maximum Power Density, Frequencies,
• Noise temperature, Analog / Digital
• HORIZON ELEVATION ANGLE DIAGRAM

13
PART III
Calculation Method for Determination of
Coordination Area
Appendix 5 - Criteria

• Reference of Article 9 (9.15)
• Case Specific Earth Station or a Typical Earth
  station associated with non-GSO in respect of
  terrestrial stations in any frequency bands for
  which a footnote refers to 9.11A

• Reference of Article 9 (9.17)
• Case Specific earth station or a typical mobile
  earth station associated with GSO, non-GSO (with
  the exception of cases covered under 9.15) with
  respect to terrestrial stations in any frequency
  bands except the plan bands

Calculation Method Appendix 7
14
Calculation Method for Determination of
Coordination Area
Appendix 5 - Criteria

• Reference of Article 9 (9.17A)
• Case Specific transmitting earth station
  associated with non-GSO or GSO in respect of
  other earth stations operating in the opposite
  direction of transmission in frequency bands
  allocated with equal rights to space
  radiocommunication services in both directions of
  transmission with the exception of bands subject
  to plans

Case Receiving Earth Station There is no
methodology for calculating the receive earth
station coordination contour with respect to a
transmitting earth station. However, the
requirement of coordination can be identified by
verifying whether or not the receiving Earth
Station is falling within the coordination area
of any transmitting earth stations
Calculation Method Appendix 7
Calculation Method Appendix 7
15


TABLE 5-1
(continued)
Appendix 5 Criteria (example)
 
16
Appendix 7 Methods for the Determination of the
Coordination Area


17
Appendix 7 Methods for the Determination of the
Coordination Area

• MODE (1)
• Propagation of signals in troposphere via near
• great-circle paths (Tropospheric scatter,
  Ducting, reflection/refraction, gaseous
  absorption and Diffraction)
• Elevation angle is important for Site Shielding
  (Diffraction) effect
• 4 Basic radio-climatic zones A1, A2, B, C

• MODE (2)
• Propagation of signals by scattering due to
• hydrometeors
• 15 basic rain-climatic zones A to N, P and Q

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HORIZON ELEVATION ANGLE
.
Horizon Elevation Angle
Earth station
Building
19
HORIZON ELEVATION ANGLE
20
(No Transcript)
21
Coordination contours shall be those which lead
to the greatest coordination distance
Coordination distance Minimum10 km Maximum
Mode 1 1200 km (Zone C)
Mode 2 369 km ( )
22
Auxiliary Contour Appendix 7
B
Coordination contour
(55 dBW)
A
23
Coordination area of Receiving Earth Station
with respect to Terrestrial Stations
MNG
RUS
KRE
J
KOR
CHN
Plot scale 150 km/cm
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Coordination area of Receiving Earth Station
with respect to Terrestrial Stations
CHN
KOR
J
CHN
Plot scale 50 km/cm
25
Coordination area of Transmitting Earth Station
with respect to other receiving Earth Stations
MNG
RUS
KRE
J
KOR
CHN
Plot scale 150 km/cm
26
Coordination Area of Mobile Earth Stations
For a mobile earth station, the periphery of the
service area is extended by the coordination
distance. The coordination distance may be a
predetermined coordination distance or it may be
calculated (No additional protection can be
assumed to be available from the earth station
horizon elevation angle for all azimuths)
.
.
.
.
.
.
.
.
.
.
Earth Station Service Area
.
.
.
.
.
.
.
27
Coordination Area 9.11A/9.15
Ground-based Mobile Earth Station in respect of
Terrestrial Mobile(aircraft) in Band 1 - 3 GHz
Coordination Area
500 Km
500 Km
500 Km
Service Area Mobile Earth Station
500 Km
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PART IV
Computer Program for Determination of
Coordination Area
R1448 for methods specified in Appendix 7
(WRC-2000) (ITU Digitized World Map(IDWM) is
required)(See also Recommendation ITU-R SM.1448)
Administrations are recommended to read .doc
files in the program.
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RUNNING CALCULATIONS
1
5
4
6
3
2
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INPUT FILE
USE CREATE INPUT of Program R1448
REC ITU-R SM. 847 INPUT DATA

IdNo 001 ADMKOR
CTYKOR PHASED ESTN SEMINAR JEJU E/S
ESCOORDS126E361633N2653 RNCLZNK SAT
SAMPLE-KOR-X/S BAND GEOSYNCY
GMIN-10. AUXPLOT 1-10. 2-20. 30. 40.
50. 60. AUXPRINTY SQSIDE100 (mm)
PLOTSCALE 50. (km/cm) RECEIVEY
TRANSMITY
RADPATRN 7 MINRCVFRMHZ2630.0
MAXRCVFRMHZ2655.0 SUPCNR 10 ESNOISE
100 RECVANTG41.9
SERVTYPE 9 RECVPC0.00100 MINTRNFRMHZ8025.
MAXTRNFRMHZ8400 SUPCNT-10
POWRDENS-32.0 TRANANTG58.5
TRANPC0.00500 BDIRPC0.00000
SATLONG116. MINELA10.
INCLINATION0. SATEAST-------
SATWEST------- AUXM2 15.0 27.0
310.0 44.0 50. 60.
NUMELEVPAIR10 AZIMS lt1gt
0. lt2gt 30. lt3gt 60. lt4gt 90. lt5gt
120. lt6gt 150. lt7gt 180. lt8gt
220. lt9gt 270. lt10gt 320. HORELVS lt1gt
0. lt2gt 0. lt3gt 0. lt4gt 0. lt5gt 0.
lt6gt 0. lt7gt 0. lt8gt 0.
lt9gt 0. lt10gt 0. COEFA32.
(Seminar Sample)
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Results of Calculations and Plots
(Seminar Sample)
(Plot scale 150 km/cm )
2.1 Tx E/S vs Terrestrial S
2.1 Rx E/S vs Terrestrial S
3.2.1 Tx E/S vs unknown Non-GEO Rx E/S
3.1 Rx E/S vs unknown GEO Rx E/S
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Results of Calculations and Plots
(Seminar Sample)
(Plot scale 50 km/cm )
2.1 Tx E/S vs Terrestrial S
2.1 Rx E/S vs Terrestrial S
3.2.1 Tx E/S vs unknown Non-GEO Rx E/S
3.1 Rx E/S vs unknown GEO Rx E/S
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PART V
COORDINATION REQUEST
Coordination Contours AP7
COORDINATION DISTANCE CALCULATION
Countries identified
APP 5
Coordination Request of Adm A (AP4/III forms And
Coordination Contours)
To Countries identified (Administrations B,
C, D, )
34
Response to Request of Coordination by
Administration B

• Acknowledge receipt of the coordination request
• Collect data on existing and planned TS ES(ODT)
  to be brought into use in the next 3 years or to
  be operated prior to the date of bringing into
  use of earth station, falling within its
  coordination area.

B
A
TS Terrestrial Station ES Earth Station
ODT opposite direction of Transmission
35
Response to Request of Coordination by
Administration B

• Conduct Technical Examination
• Detailed technical examination is not required
  if the TS ES(ODT)
• Are not inside the coordination area or
• Has no frequency overlap or
• With lesser potential are not inside the
  Auxiliary contours
• Interference is within the acceptable level

TS Terrestrial Station ES Earth Station
ODT opposite direction of Transmission
36
Response to Request of Coordination by
Administration B
Conduct Detailed Technical Examination
Detailed technical examination is required if TS
ES(ODT) inside the coordination contour or
auxiliary contours could cause or receive
unacceptable interference. Exchange of
information like terrain profile, modulation
scheme, precise e.i.r.p and sensitivity may help
administrations to reach coordination agreement
TS Terrestrial Station ES Earth Station
ODT opposite direction of Transmission
37
Response to Request of Coordination by
Administration B
Coordination agreement is reached (9.52B)
Administration B may agree to the coordination
by requesting the inclusion of its TS ES(ODT)
not yet recorded in the MIFR but are to be
brought into use in the next three years and
sends complete characteristics (AP4 Annex 1A/1B
or 2A/2B) of these stations to Administration A
and the Bureau.
TS Terrestrial Station ES Earth Station
ODT opposite direction of Transmission
38
Response to Request of Coordination by
Administration B

• Coordination agreement is not reached (9.52)
• Administration B does not agree to the
  coordination request. It shall
• within four months of the date of dispatch of the
  coordination data, inform Administration A of its
  disagreement
• provide information concerning its own
  assignments upon which that disagreement is
  based and
• make such suggestions as it is able to offer with
  a view to satisfactory resolution of the matter.
• A copy of that information shall be sent to the
  Bureau.
• Only that information relating to existing
  radiocommunication stations or to those to be
  brought into use within the next three months for
  terrestrial stations, or three years for earth
  stations, shall be treated as notifications under
  Nos. 11.2 or 11.9.

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PART VI
ASSISTANCE BY THE BUREAU
Regulatory Provisions to Seek Bureaus Assistance

• 9.33 Direct communication between the
  Administrations not possible
• 13.1 General provision in case of difficulty
  in applying the provisions of Article 9 and 11
• 7.6 Special assistance
• 9.46 No acknowledgement of receipt of
  coordination data
• 9.60 No decision or relevant information within
  4 months
• 9.63 Continuing disagreement

40
Request for Assistance During Coordination of
Earth Stations Under No.9.46
Date D1

9.29
AP4/III

9.45 (acknowledgement within D1 30 days)
9.46
9.46
Date D2
No acknowledgement within D2 15 days)
BR Assistance (9.46)
41
Assistance Under No.9.46

No acknowledgement of coordination data received
by Administration A within 30 days from the date
of request

• Administration A sends a telegram requesting
  immediate confirmation.
• If no reply is received in the next 15 days
  Administration A can request the Assistance of
  the Bureau
• The Bureau requests Administration B for
  Immediate acknowledgement
• Bureau forwards any response to Administration A
  for further action in completing coordination

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Assistance Under No.9.46

9.46
9.46
AP4/III

9.47
9.48/9.49
43

Bureau Applies Nos.9.47 - 9.49
If no reply is received from Administration B
Within 30 days of Bureaus action the Bureau
applies Nos.9.47 to 9.49

• No complaint will be made in respect of any
  harmful interference affecting its own
  assignments which may be caused by the
  assignment for which coordination was
  requested.
• The use of its own assignments will not cause
  harmful interference to the assignment for which
  coordination was requested.

44

Request for Assistance During Coordination of
Space Stations
9.30
9.38 (Date of IFIC D)
IFIC
AP4/II
9.42
9.51/9.52 (within D 4 months)
9.41 (within D 4 months)
9.52 (within D 4 months)

BR Assistance (9.60)

9.61/9.62
BR Assistance (9.63)
45
Request for Assistance During Coordination of
Earth Stations Under No.9.60

Date D1
9.29
AP4/III

9.45 (acknowledgement within D1 30 days)
9.51A/9.52
9.60
Within Date D1 4 months
BR Assistance (9.60)
46
Assistance Under No.9.60 During Coordination of
Earth Stations and Space Stations


9.60
9.61
AP4/III

Space Station
(Within 30 days of Bureaus action)
9.48/9.49
47

Assistance Under No.9.60
Administration B has to give either decision or
relevant information within 4 months (No.9.52)
from the date of request (No.9.29 or No.9.38)

• Administration A seeks the Assistance of the
  Bureau (No.9.60)
• The Bureau requests Administration B for early
  decision or provide the relevant information
  (No.9.61)
• Bureau forwards any response to Administration A
  for further action in completing coordination
• If the Administration B fails to reply within 30
  days of Bureaus action the provisions of
  Nos.9.48 and 9.49 will be applied by the Bureau

48
Bureau Applies Nos.9.48 - 9.49
Bureau communicates application of Nos.9.48 and
9.49 to all concerned administrations under which
Administration B Is deemed to have undertaken
that

• No complaint will be made in respect of any
  harmful interference affecting its own
  assignments which may be caused by the
  assignment for which coordination was
  requested.
• The use of its own assignments will not cause
  harmful interference to the assignment for which
  coordination was requested.

49
Assistance Under No.9.33
Direct communication not possible

• For Example
• If Administration A is unable to act under
  No.9.29, it shall seek the assistance of the
  Bureau.
• Bureau shall then send the request for
  coordination to the Administration B and
• Take any further necessary actions under
  Nos.9.45 - 9.61 as appropriate

50
Special Assistance Under No.7.6

• An administration in need of special assistance
  may request the Bureau under the provisions of
  No.7.6
• Results of AP8 analysis
• Preparation of the coordination contour
• Clarification of Rules of Procedure
• Any other requirement of technical nature

51

Assistance Under No.9.63
CONTINUED DISAGREEMENT

• Bureaus examination under No.11.32A may be
  sought
• by either of the administrations involved in the
  coordination process or
• when administrations involved follow the
  required coordination procedure and at the end
  there is continuing disagreement.

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Assistance Under No.9.63

CONTINUED DISAGREEMENT

• The Bureau assesses the interference as provided
  in PART B, Section B3 of Rules of Procedure, for
  which the administrations concerned have to
  provide information in addition to that provided
  under Appendix 4 such as
• agreed criteria for the acceptable interference
• Modulation characteristics and
• Set of test points defining the service area
• Recommendation ITU-R S.741 is used with respect
  to coordination of the networks under No.9.7 and
  the conclusions are communicated

53
RecapitulationRegulatory Provisions to Seek
Bureaus Assistance

• 9.33 Direct communication between the
  Administrations not possible
• 13.1 General provision in case of difficulty
  in applying the provisions of Article 9 and 11
• 7.6 Special assistance
• 9.46 No acknowledgement of receipt of
  coordination data
• 9.60 No decision or relevant information within
  4 months
• 9.63 Continuing disagreement