Mobile Services Plans, Operational Procedures

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Mobile Services Plans, Operational Procedures

• N. Vassiliev

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Outline of the presentation

• Terms and definitions
• Land Mobile Service
• Maritime Mobile Service
• Regulations
• Plans, operational procedures
• Aeronautical Mobile Service
• Regulations
• Plans, operational procedures
• Summary

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Regulation of the land mobile service

• No allotment/assignment plans
• No specific coordination procedures (except ARS9,
  GE85, RJ88 and shared bands)
• Voluntary coordination in border areas (special
  agreements)
• No specific provisions for the characteristics of
  stations, except general power limits in the
  shared bands

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Regulation of Maritime Mobile Service (MMS)

• Subject to a very detailed international
  regulations
• Radio Regulations
• Articles S5, S46 - S58
• Appendixes S13, S15 - S18
• Recommendations ITU-R M.257-3, M.476-5, M.489-2,
  M.625-3, M.627-1, M.1173, M.1174
• Allotment and assignment frequency plans APS25,
  GE85-MM-R1, GE85-EMA
• Coordination procedures ARS9, Res. 339 (rev.
  WRC-97)

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MMS in bands between 4 000 and 27 500 kHz

• Sub-divisions of the exclusive frequency bands
  at 4, 6, 8, 12, 16, 18/19, 22 and 25/26 MHz
• Channels to be used by ship stations (MS) and
  coast stations (FC) are placed at the opposite
  ends of each band
• Facilitate the working of duplex radiotelephone
  equipment on board ship
• Similar frequency separation for NBDP telegraph
  systems between the coast and ship station
  transmitting frequencies (to be used in pairs)
• Each sub-band elaborately planned in order to
  make maximum use of the available spectrum

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MMS in bands above 28 MHz

• No exclusive allocations
• Priority in some parts of band 156 - 174 MHz
• Table of transmitting frequencies in VHF band of
  APS18 (non-mandatory)
• Specification of frequencies for on-board
  communications in 450 - 470 MHz band

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Frequency allotment and assignment plans

• Frequency allotment plan for coast radiotelephone
  stations in bands 4 000 - 27 500 kHz (APS25 to
  RR)
• Frequency allotment plan for national channels in
  DSC system in band 435-526.5 kHz (GE85-MM-R1)
• Frequency assignment plans for maritime mobile
  and aeronautical radionavigation services in the
  MF bands in Region 1 (GE85-MM-R1)
• Frequency assignment plan for radionavigation
  service (radiobeacons) for the European maritime
  area in the band 283.5 - 315 kHz (GE85-EMA)

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Frequency allotment plan of Appendix S25

• Scope
• Worldwide plan
• Coast radiotelephone stations in 4 000 - 27 500
  kHz
• 240 channels allotment areas
• Characteristics
• Bandwidth - 2.8 kHz
• Channel separation - 0.2 kHz
• Class of emission - J3E
• Maximum peak envelope power - 10 kW

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APS25 plan modification procedure

• Submission of APS4 information to the BR
• Publication of the information and apparent
  incompatibilities in a special section of BRIFIC
• Coordination with affected administrations
• Successful coordination - recording in the Plan
• Continuing disagreement - examination by BR

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Frequency assignment plan for maritime mobile
service in Region 1 (GE85-MM-R1)

• Scope
• Region 1 plan
• Planned bands 415 495 kHz, 505 - 526.5 kHz,
  1606.5-1625 kHz, 1635-1800 kHz, 2045-2160 kHz
• Applies also to aeronautical radionavigation,
  fixed, land mobile and radiodetermination
  services
• Characteristics
• Paired frequencies for coast and ship stations
• Classes of emission - A1A, F1B, J3E
• Chan. spacing 0.5 kHz (A1A, F1B), 3kHz (J3E)

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Assignment plan for aeronautical radionavigation
service in Region 1 (GE85-MM-R1)

• Scope
• Region 1 plan
• Frequency bands 415 435 kHz, 510 526.5 kHz
• Applies also to maritime mobile, fixed, land
  mobile services
• Characteristics
• 34 channels
• Channel spacing - 1 kHz (0.5 kHz exceptionally)
• Classes of emission A1A, A2A

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Plan modification procedure for GE85-MM-R1
assignments plans

• Submission of APS4 information to the BR
• Publication of the information in BRIFIC
• Coordination with affected administrations
• Informing the BR about the results (9015 days)
• Successful coordination - recording in the Plan
• Disagreement AR50 of the Convention

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Assignment plan for maritime radionavigation
service (radiobeacons) (GE85-EMA)

• Scope
• Plan for European maritime area
• Frequency bands 283.5 - 315 kHz
• Applies also to aeronautical radionavigation
  service
• Characteristics
• Class of emission A1A, F1B
• Minimum field strength to be protected
• 34 dB(µV/m) for stations north of 43 N parallel
• 37.5 dB(µV/m) for stations on and south of 43 N
  parallel

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Coordination procedures for maritime mobile
service

• Standard procedure of Article S9
• Res. 339 (Rev.WRC-97) coordination of NAVTEX
  services on 490 kHz, 518 kHz and 4209 kHz
• Performed through IMO
• IMO provides ITU with coordination information
• ITU publishes the information in List IV (Coast
  stations)
• Procedure of Res. 300 was abrogated by WRC-2000

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Regulation of aeronautical mobile service (AMS)

• Distinction between route (R) and off-route (OR)
  services
• Worldwide allotment plans (APS26, APS27)
• Coordination procedures not mandatory
• (R) service through ICAO (Rec. 402)
• Additional mandatory provisions (prohibition of
  CP/CR in the exclusive bands)

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Allotment plan for aeronautical mobile (OR)
service (APS26)

• Scope
• Worldwide plan
• Planned band 3 025 - 18 030 kHz (10 sub-bands)
• Carrier frequencies, allotment areas
• Characteristics
• Bandwidth - 2.8 kHz
• Classes of emission - J3E A1A A1B
  F1B(A,H)2(A,B) (R,J)2(A,B,D) J(7,9)(B,D,X)
• Mean effective radiated power - 1 kW
  (aeronautical stations) 500 W (aircraft
  stations)

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Procedure for modification of APS26 Plan

• Requests for a new allotment - BR selects an
  appropriate allotment and enters it in the Plan
• Requests for an additional allotment - the
  allotment is entered in the Plan only if it is
  compatible with the remaining allotments
• Requests for the suppression of an allotment - BR
  cancels the allotment from the allotment
  arrangement

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Allotment plan for aeronautical mobile (R)
service (APS27)

• Scope
• Worldwide plan
• Planned band 2 850 - 22 000 kHz
• Carrier frequencies, geographical areas (MWARA,
  RDARA, VOLMET areas)
• Characteristics
• Classes of emission J3E H2B, J7B, J2D, J9X
  (A1A/A1B) and F1A/F1B
• Frequency separation - 3 kHz, multiple to 1 kHz
• No plan modification procedure

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Coordination procedures in the aeronautical
mobile service

• No RR special procedures, but coordination is
  desirable
• Role of ICAO and its regional offices
• coordination of frequencies for (R) service in
  117.975 - 137 MHz band
• list for the coordinated use of APS27 frequencies
  for long-distance communications
• Notification after coordination trough ICAO
  regional office

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Summary

• Flexibility in establishing the land mobile
  service
• Very detailed regulations of maritime and
  aeronautical mobile services
• Frequency allotment plans for MMS (APS25, GE85M)
  and AMS (APS26, APS27)
• Frequency assignment plans for MMS, ARNS
  (GE85-MM-R1) and for MRNS (GE85-EMA)
• Coordination procedures for MMS through IMO (Res.
  339) and for AMS (R) through ICAO (Rec.402)