WRC–12Industry Debrief23 April 2012

Agenda item 1.9 – Appendix 17 – New digital technologies for MMSPresenter: Peter Pokorny

WRC–12Industry Debrief

> 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.

1 maritime mobile service

WRC–12Industry Debrief

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.

WRC–12Industry Debrief

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.

WRC–12Industry Debrief

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.

WRC–12Industry Debrief

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).

WRC–12Industry Debrief

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)

WRC–12Industry Debrief

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.

WRC–12Industry Debrief

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. tx power 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.

WRC–12Industry Debrief

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.

WRC–12Industry Debrief

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.

WRC–12Industry Debrief

40634065

4146

4170

4152

4180.254189.254198.254207.254209.254216.254219.25

4221

4351

4438

40634065

4146

4172

4152

4181.754186.75

4202.254207.254209.254219.25

4221

4351

4438

Annex I Annex II Ship – oceanographic data txShip - duplex telephonyShip & coast station simplex telephony

Ship wide-band telegraphy, facsimile & special tx systemsWide-band systems, special & data tx & direct-printing telegraphyShip station data tx

NBDP telegraphy & data tx systems ≤ 100 Bd (FSK) & 200 Bd (PSK)

Ship station Morse calling – A1A or A1B telegraphy

Ship & coast station data tx

Ship station Morse working – A1A or A1B telegraphy

Ship station digital selective calling

Coast station data tx

Coast station wide-band, A1A or A1B Morse, facsimile, special data tx & direct-printing telegraphy systems

Coast station duplex telephony

Coast station digital selective calling

Paired coast station narrow-band direct-printing (NBDP) telegraphy & data tx systems ≤ 100 Bd (FSK) & 200 Bd (PSK)

Paired & non-paired coast station narrow-band direct-printing (NBDP) telegraphy & data tx systems ≤ 100 Bd (FSK) & 200 Bd (PSK)

4 MHz outcome for new RR Appendix 17 (WRC-12) – similar for other bands

Annex I = existing Appendix 17, Annex II = new Appendix 17

4172

4152

4181.754186.75

4202.25

4207.254209.25

4219.254221

4170

4152

4351

4180.25

4189.25

4198.25

4207.254209.254216.254219.25

4221

4351

Annex IIAnnex I

MorseMorse

NBDP

Morse

MorseDSCNBDP NBDP

DSC

DSC DSC

Coast stationwide band telegraphy,A1A, A1B, Morse,Facsimile,Special data,Direct-printing telegraphy

NBDP

4 MHz detail showing changed usage for new RR Appendix 17 (WRC-12) – similar for other bands

WRC–12Industry Debrief

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.

WRC–12Industry Debrief

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