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Agenda item 1.9 – Appendix 17 – New digital technologies for MMS

Agenda item 1.9 – Appendix 17 – New digital technologies for MMS. Presenter: Peter Pokorny . 1.3 Agenda item 1.9 – Appendix 17 New digital technologies for MMS 1

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Agenda item 1.9 – Appendix 17 – New digital technologies for MMS

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  1. Agenda item 1.9 – Appendix 17 – New digital technologies for MMS Presenter: Peter Pokorny

  2. 1.3 Agenda item 1.9 – Appendix 17 New digital technologies for MMS 1 to revise frequencies and channelling arrangements of Appendix 17 to the Radio Regulations, in accordance with Resolution 351 (Rev.WRC-07), in order to implement new digital technologies for the maritime mobile service. WRC-12 CPM-2 Report identified two Methods, A1 and A2 for the single issue A. 1maritime mobile service

  3. Essential difference: Method A1 to not specify any bandwidth in the bands dedicated for digitally modulated emissions; Method A2 the basic bandwidth for new digital technologies should be 3 kHz, and should allow use of multiple 3 kHz contiguous channels for wideband systems.

  4. ITU-R Regional Positions CEPT – Method A1 RCC – Method A1 ATU – Method A1 ASM – Method A1 CITEL – Method A2 APT – Method A2 The result was hard fought, led by CITEL and supported by APT, and consisted basically of a third Method, with significant compromise on both sides.

  5. Position going into WRC-12 The majority of APT Members supported the Method A2 in the CPM Report. However, two Members supported Method A1 (New Zealand and Vietnam). New Zealand was concerned about existing ‘wideband’ systems that used 4 kHz spacing.

  6. Outcome - no change to: Oceanographic data Digital Selective Calling Radiotelephony (Appendix 25), but digitally modulated emissions can be used under certain conditions Protection for GMDSS including maritime safety information. but changes made to: NBDP (a reduction in non-GMDSS channels) Morse provisions (some residual retained) New provisions for digitally-modulated emissions (extensive).

  7. The main compromise: CITEL and APT accepted that one sub-band in each portion of Appendix 17, be completely unchannelised, as follows: 4 221- 4 351 kHz (130 kHz) 6 325 - 6 501 kHz (168 kHz) 8 438 - 8 707 kHz (269 kHz) 12 658 - 13 077 kHz (418.5 kHz) 16 904.5 - 17 242 kHz (337.5 kHz) 19 705 - 19 755 kHz (50 kHz) 22 445.5 - 22 696 kHz (250.5 kHz) 26 122.5 - 26 145 kHz (22.5 kHz)

  8. Other compromises More residual NBDP as in Method A2. Provision to use digitally modulated emissions in radiotelephony channels under certain conditions as in Method A1. Channelisation based on 3 kHz in key parts with suitable channel pairing as in Method A2. One unchannelised block in each sub-band, part of Method A1.

  9. Changes in RR Article 52 A new Section VII, Data transmission, has been added to Article 52, Special Rules relating to the use of frequencies: Required emission mode to be J2D Max. txpower for coast stations is 15 kW PEP Max. tx power for ship stations is 1.5 kW PEP Coast station details to be published Recommendation ITU-R M.1798 to be used for coast stations and ship stations.

  10. Changes to Appendix 17 Part A – Table of subdivided bands, has been highly modified in the appropriate data-related portions. New Notes created at end of Tables in Part A – Table of subdivided bands. New Section IV – Data transmission – Table showing the channels on a 3 kHz basis. Previous Old Morse Sections IV and V have been suppressed.

  11. Digitally modulated emissions The new dedicated bands for digitally modulated emissions are denoted by Note p). These emissions may combine multiple 3 kHz contiguous channels under Note i). The radiotelephony bands can also be used for digitally modulated emissions under Notes ff)hh), ii) and jj) under certain conditions, such as occupied bandwidth ≤ 2 800 Hz.

  12. Ship – oceanographic data tx Annex I Annex II Ship - duplex telephony 4063 4063 4065 4065 Ship & coast station simplex telephony Coast station duplex telephony Ship wide-band telegraphy, facsimile & special tx systems Wide-band systems, special & data tx & direct-printing telegraphy 4146 4146 Ship station data tx 4152 4152 Coast station data tx 4170 4172 4180.25 4181.75 Ship & coast station data tx 4186.75 4189.25 4198.25 Paired coast station narrow-band direct-printing (NBDP) telegraphy & data tx systems ≤ 100 Bd (FSK) & 200 Bd (PSK) 4202.25 4207.25 4207.25 4209.25 4209.25 4216.25 4219.25 4219.25 4221 4221 Paired & non-paired coast station narrow-band direct-printing (NBDP) telegraphy & data tx systems ≤ 100 Bd (FSK) & 200 Bd (PSK) NBDP telegraphy & data tx systems ≤ 100 Bd (FSK) & 200 Bd (PSK) Ship station Morse calling – A1A or A1B telegraphy Ship station Morse working – A1A or A1B telegraphy Coast station wide-band, A1A or A1B Morse, facsimile, special data tx & direct-printing telegraphy systems Ship station digital selective calling 4351 4351 Coast station digital selective calling Annex I = existing Appendix 17, Annex II = new Appendix 17 4 MHz outcome for new RR Appendix 17 (WRC-12) – similar for other bands 4438 4438

  13. Annex II Annex I Includes systems up to 100 Bd (FSK) and 200 Bd (PSK) 4152 4152 NBDP 4170 4172 NBDP Morse New digitally- modulated emissions (3 kHz channelised) 4180.25 4181.75 Morse 4186.75 4189.25 Morse 4198.25 4202.25 Morse 4207.25 4207.25 DSC DSC 4209.25 4209.25 NBDP NBDP 4216.25 4219.25 4219.25 DSC DSC Includes systems up to 100 Bd (FSK) and 200 Bd (PSK) 4221 4221 Coast station wide band telegraphy, A1A, A1B, Morse, Facsimile, Special data, Direct-printing telegraphy New digitally- modulated emissions (unchannelised) 4351 4351 4 MHz detail showing changed usage for new RR Appendix 17 (WRC-12) – similar for other bands

  14. Morse The new Appendix 17(Annex II) does not contain Annex I Section IV - Morse Telegraphy (Calling)and Section V – Morse Telegraphy (Working) – a historic change. However, there is provision for residual Morse operation under Note m), which can still be used in most Note p) sub-bands of Appendix 17, but cannot claim protection from new digitally modulated emissions.

  15. Transition dates and notes WRC-12 opinion was split evenly between 1 January 2015 and 2017. However, the transition date of 1 January 2017 was agreed. Administrations can implement digitally modulated emissions prior to 1 January 2017, but not claim protection. See Annex II, Note kk). Resolution 351 (Rev.WRC-07) has been suppressed. END

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