ICAO was created in 1944 to promote the safe and orderly development of civil aviation in the world. A specialized agency of the United Nations, it sets

ICAO was created in 1944 to promote the safe and orderly development of

civil aviation in the world. A specialized agency of the United Nations, it sets

international standards and regulations necessary for the safety, security,

efficiency and regularity of air transport and serves as the medium for

cooperation in all fields of civil aviation among its 187 Contracting States.

ICAO was created in 1944 to promote the safe and orderly development of

civil aviation in the world. A specialized agency of the United Nations, it sets

international standards and regulations necessary for the safety, security,

efficiency and regularity of air transport and serves as the medium for

cooperation in all fields of civil aviation among its 187 Contracting States.

Presentation by Robert Witzen, Secretary of the

Aeronautical Communications Panel, to the

Seminar on implementation of data link and SATCOM

Communications in the

ICAO Regional Office for the ASIA/PACIFIC Region in

Bangkok, Thailand from 17 – 19 November 2003 on the

“results of the ICAO 11th AIR NAVIGATION CONFERENCE

(Montreal, Canada) from 22 September to 4 October 2003”

Presentation by Robert Witzen, Secretary of the

Aeronautical Communications Panel, to the

Seminar on implementation of data link and SATCOM

Communications in the

ICAO Regional Office for the ASIA/PACIFIC Region in

Bangkok, Thailand from 17 – 19 November 2003 on the

“results of the ICAO 11th AIR NAVIGATION CONFERENCE

(Montreal, Canada) from 22 September to 4 October 2003”

4

1111thth AIR NAVIGATION CONFERENCE AIR NAVIGATION CONFERENCE

• 22 September – 3 October 2003 Montreal• Air Traffic Management (ATM) and

Communication, Navigation and Surveillance (CNS) issues

• Communication issues:– Agenda item 5: Review of the outcome of the ITU World

Radiocommunication Conference (2003) (WRC-03) and its impact on aeronautical electromagnetic spectrum utilization

– Agenda item 7: Aeronautical air-ground and air-air communications

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1111thth AIR NAVIGATION CONFERENCE AIR NAVIGATION CONFERENCE Agenda item 5: Review of the outcome of the ITU World Agenda item 5: Review of the outcome of the ITU World

Radiocommunication Conference (2003) (WRC-03) and its Radiocommunication Conference (2003) (WRC-03) and its impact on aeronautical electromagnetic spectrum utilizationimpact on aeronautical electromagnetic spectrum utilization

• Results of WRC-03 on aeronautical key items

• Preparation for WRC-07

• Electromagnetic interference

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• Results of WRC-03 on aeronautical key items

1. MLS extension band (5091-5150 MHz)

This band remained available for current or new ICAO standardized radionavigation systems

2. Radar bands (2700-2900 MHz for primary surveillance radar and 5350-5470 MHz for airborne weather radar)

Sharing with radiolocation approved with special conditions to protect aeronautical radar from interference.

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Results of WRC-03 on aeronautical key items (continued)

3. Protection of: DME (960-1215 MHz); and primary radar (1215-1300 MHz)

Protection agreed from interference from Radionavigation Satellite Service (such as GPS, GLONASS, Galileo) through:

1. PFD limit for RNSS in the band 960-1215 MHz to protect DME2. Regulatory provisions in the band 1215-1300 MHz to protect radar

4. Allocation to the Aeronautical Mobile (R) Service in the band 108-117.975 MHz

Allocation limited to “systems that transmit navigational information in support of air navigation and surveillance functions in accordance withrecognized international aviation standards” and “shall not cause interferenceto nor claim protection from stations in the radionavigation service whichoperate in accordance with international aeronautical standards”

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• Preparation for WRC-07

Main issues:

1. Upgrading of the radiolocation service in the band 9200-9500 MHz

this band is used by aviation for ground-based and airborne weather radar

2. New allocations to the aeronautical mobile (R) service between 100 MHz and 6 GHz

these are necessary to accommodate increased air-ground communications

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• Electromagnetic interference– Aeronautical sourcesInterference between aeronautical systems, on-board interference

– Non-aeronautical sourcesInterference from non-aeronautical users, both on the ground and

inside the aircraft

– Malicious interferenceIntentionally generated interference with the view to disrupt air

traffic

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1111thth AIR NAVIGATION CONFERENCE AIR NAVIGATION CONFERENCE Agenda item 7: Aeronautical air-ground and air-air Agenda item 7: Aeronautical air-ground and air-air

communicationscommunications

• Implementation programsThe meeting received information on the status of implementation

of various air-ground data links

• ADS-B data linksThe meeting addressed the progress of the development of technical elements of ADS-B data links

• Future of mobile communicationsThe meeting reviewed the future evolution of current aeronautical communications

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• Implementation programsTransition to VDL in JapanTransition to AMSS in JapanData link Flight information service applications in ChinaImplementation of HF Data link by ARINCImplementation of VDL by ArincSITA air-com data link serviceFAA NEXCOM air-ground communications programFAA Capstone programAir-ground data link implementation in EuropeModernization of aeronautical communications in IndiaModernization of data link communications in Brazil

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• ADS-B data linkscomparative analysis of three ADS-B data links:

Mode S extended squitter

VDL Mode 4

UAT

Comparison against criteria developed by ICAO Aeronautical Mobile Communications Panel, RTCA and Eurocontrol

The meeting noted that

- All of these data links may meet all requirements

- Each of these data links had relative advantages over the others

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• ADS-B implementation decisions United States – Mode S ES for air transport aircraft and UAT for

general aviation

Eurocontrol – Mode S ES recommended

Sweden – VDL Mode 4

Australia – Mode S ES planned

ASIAPAC - Mode S ES recommended

Russian federation - VDL Mode 4 adopted

Mongolia – VDL Mode 4 recommended for lower airspace; ES in upper airspace

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• ADS-B near-term implementation strategy- Many States consider the use of Mode S ES as initial ADS-B data

link

- Other solutions (VDL Mode 4, UAT) may be used on regional or national basis

- Recommendation 7/1 invites States to take into account to the extent possible the common element of Mode S ES as initial ADS-B data link

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• ADS-B long-term implementation strategypending development of long term ICAO operational requirements (OPLINK panel):

- Mode S ES may not offer sufficient capacity to accommodate all aircraft in certain airspace

- continued development of alternative ADS-B technology appropriate,

including:

- enhancements to already available ADS-B data links

- new ADS-B data link technology

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• Evolution of aeronautical mobile communications - to accommodate new functions- to provide adequate capacity and quality of services- need to increase the availability of spectrum

• Possible scenarios• - Introduction and expansion of existing voice and data link systems

already included in Annex 10• - New terrestrial and/or satellite systems operating outside the VHF

band for implementation in high traffic density areas

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• Development of future air-ground communication systems- Evolutionary approach (Rec. 7/3)- Future technology alternatives (Rec. 7/4)- Standardization guidelines for new aeronautical

communication systems (Rec. 7/5)

Further detailed information is available in theReport of the 11th Air Navigation Conference on Agenda Item 7

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• Specifics with VDL Mode 4 and/or on-board integration of new systems- review of difficulties with on-board integration of new systems, in particular with VDL Mode 4, and possibly also with VDL Mode 3 and Mode 2- work on a solution is on-going in ICAO ACP - on-board integration of new equipment requires more attention from ICAO

• The Air Navigation Commission will review the report of the 11th ANC in January 2004

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Documents

ICAO was created in 1944 to promote the safe and orderly development of civil aviation in the world. A specialized agency of the United Nations, it sets