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ICAO Seminar on the Implementation of Datalink and SATCOM Communications Bangkok, 17-19 November 2003 VHF ACARS to ATN Akhil Sharma.

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Presentation on theme: "ICAO Seminar on the Implementation of Datalink and SATCOM Communications Bangkok, 17-19 November 2003 VHF ACARS to ATN Akhil Sharma."— Presentation transcript:

1 ICAO Seminar on the Implementation of Datalink and SATCOM Communications Bangkok, November 2003 VHF ACARS to ATN Akhil Sharma

2 ICAO Bangkok November2003 Outline VDL Mode 2 Background ACARS over VDL AVLC – An Interim Step SITA VGS VDL Mode 2 – Drivers for Deployment SITA/AENA Partnership Agreement VDL Mode 2 Coverage ATN Service Provision

3 ICAO Bangkok November2003 VDL Mode 2 Background Aircraft implementation of ACARS started in 1978 using VHF voice radios to limit the avionics cost. –Attempts were made in the 1980s to implement a higher capacity VHF digital system but the business case could not be made. An IATA recommendation, supported by SITA, to the ICAO conference in in 1990 led ICAO to launch the standardisation of VHF digital link. –ICAO specified that the VHF digital link would enable the exchange of both air traffic and aeronautical operation control messages. ICAO in 1996 completed standards of for VDL Mode 2 –VDL Mode 2 uses digital radios to provide aircraft with a data link to ground stations at a rate of 31.5 kbit/sec using a radio channel the same width as the legacy VHF analogue ACARS system uses to provide its capacity of 2.4 kbit/sec.

4 ICAO Bangkok November2003 VDL Mode 2 One VDL Mode 2 channel provides at least 10 times more capacity increase over one ACARS channel VDL Mode 2 is operational today using single 25 kHz channel shared between service providers Selected by Eurocontrol and the FAA as the initial subnetwork technology to enable CPDLC –Consistent with IATA position

5 ICAO Bangkok November2003 VDL Mode 2/AOA AEEC defined in 1999 an interim architecture that serves as a step towards ATN referred to as AOA, ACARS over VDL AVLC AOA allows existing ACARS applications to benefit from the higher bandwidth offered by VDL M2 Main benefit, in addition to capacity increase, is that no change required to the interface to airline or ATS ground systems For aircraft, transition from AOA to ATN/VDL Mode 2 will require a software upgrade to the avionics –All ACARS avionics vendors now offer VDL AOA avionics –Several major AIRCOM customers planning AOA retrofits across the majority of their fleets SITA evaluation of VDL AOA service with KLM (B737s) has demonstrated that the service is working

6 ICAO Bangkok November2003 VDL/AOA/ATN

7 ICAO Bangkok November2003 SITA VGS Architecture interface (8) - X2Narrow band Antenna interface (8) - X1 Wide band Antenna VHF Data Radios: Each VDR can be programmed to handle VHF analog ACARS or VHF Digital Link Mode 2 VHF Ground Computer (VGC) Laptop computer for maintenance Antenna Relay switches Uninterruptible Power Supply interface (1) - X10 GPS source Power Supply Dual Power Supply VGS Management Interface ACARS Processor SITA Ground Network VDL Management Entity Processor ATN Router VDL Subnetwork Connections ACARS and VDL AOA Traffic

8 ICAO Bangkok November2003 SITA deployment of VDL Mode 2 coverage is being driven by two main factors: –Airline customer requirements for increased ACARS capacity in areas where the VHF analogue ACARS frequencies most heavily used and congestion is forecast –Air traffic service providers requiring their Controller Pilot Data Link Communications (CPDLC) to use ATN over VDL –Air traffic service providers have the choice to contract service provision or deploy their own VDL networks VDL Mode 2 Deployment Drivers

9 ICAO Bangkok November2003 SITA/AENA VDL Partnership SITA signed an agreement with the Spanish Air Traffic Service provider, AENA, that will result in: –VDL 2 coverage over entire Spanish terrestrial airspace through 21 AENA owned SITA VGS by end 1Q 2004 –AENA responsibility for housing, maintenance and management of the service –Seamless AOC service for SITA VHF AIRCOM customers –Platform for the introduction of CPDLC services over the ATN, planned for 2006 Initial concrete example of the CNS industry/public joint ventures foreseen by the European Commissions Single European Sky initiative –Provides a pragmatic basis for European regional Air Traffic Service provider entity owned VDL network service

10 ICAO Bangkok November2003 The Architecture SITA ACARS Processor AENA FANS 1/A (CPDLC/ ADS) AENA Pre-FANS ATIS/DCL AIRLINE Host Computer SITA Network Service AENA G/G Network (REDAN) VHF stations (VGS) Network Gateway MADRID BARCELONA Non AENA ATS Host Computer AENA VGS Network Service Boundary R R ATN CPDLC AOC

11 ICAO Bangkok November2003 The Architecture SITA ACARS Processor AENA FANS 1/A (CPDLC/ ADS) AENA Pre-FANS ATIS/DCL AIRLINE Host Computer SITA Network Service AENA G/G Network (REDAN) VHF stations (VGS) Network Gateway MADRID BARCELONA Non AENA ATS Host Computer AENA VGS Network Service Boundary R R ATN CPDLC FANS

12 ICAO Bangkok November2003 The Architecture SITA ACARS Processor AENA FANS 1/A (CPDLC/ ADS) AENA Pre-FANS ATIS/DCL AIRLINE Host Computer SITA Network Service AENA G/G Network (REDAN) VHF stations (VGS) Network Gateway MADRID BARCELONA Non AENA ATS Host Computer AENA VGS Network Service Boundary R R ATN CPDLC Pre-FANS

13 ICAO Bangkok November2003 The Architecture SITA ACARS Processor AENA FANS 1/A (CPDLC/ ADS) AENA Pre-FANS ATIS/DCL AIRLINE Host Computer SITA Network Service AENA G/G Network (REDAN) VHF stations (VGS) Network Gateway MADRID BARCELONA Non AENA ATS Host Computer AENA VGS Network Service Boundary R R ATN CPDLC CPDLC/ATN

14 ICAO Bangkok November2003 The Architecture SITA ACARS Processor AENA FANS 1/A (CPDLC/ ADS) AENA Pre-FANS ATIS/DCL AIRLINE Host Computer SITA Network Service AENA G/G Network (REDAN) VHF stations (VGS) Network Gateway MADRID BARCELONA Non AENA ATS Host Computer AENA VGS Network Service Boundary R R ATN CPDLC AOC/ATN

15 ICAO Bangkok November2003 AIRCOM VDL 2 Coverage

16 ICAO Bangkok November2003 VDL in Japan and Brasil With effect from 1 st September 2003, AVICOM introduced VDL/AOA service at New Tokyo and Kansai International Airports An additional 8 VDL/AOA sites across Japan scheduled for deployment by end 2004 DECEA (Brasil) plans to deploy VDL/AOA capability at Sao Paulo and Rio de Janeiro Airports by mid 2004 The SITA Internetworking Agreements with AVICOM and DECEA enables VHF AIRCOM customers to benefit from the availability of these services

17 ICAO Bangkok November2003 Transition towards ICAO ATN ICAO ATN and associated subnetwork standards are finally complete –VDL Modes 2, 3 and 4 –Mode S Datalink –AMSS Main ATN objective is to integrate various air/ground and ground/ground subnetwork technolgies into a seamless transparent end-to- end service ICAO ATN Standards include definition of ADS, CPDLC and FIS applications

18 ICAO Bangkok November2003 The ATN Concept

19 ICAO Bangkok November2003 Link2000+ Programme Co-ordinating the implementation of CPDLC services over ATN/VDL2 in Europe Services are compatible with FAA CPDLC Build 1 Maastricht UACC will introduce the service in Dec Maastricht FANS 1/A Service re-launched June 03 Two major airlines (SAS and LH) have committed to support the Link2000+ programme for ATN Eurocontrol is funding upgrade from AOA to CPDLC/ATN/VDL2 for 100 pioneer aircraft Eurocontrol now considering providing funding to States of upto $1M per ACC (max. 5) ATS providers to pay for ATS data link messages

20 ICAO Bangkok November2003

21 Link2000+ Airline and ATSP Statements Airlines and ATS providers have stated that: –Neither aircraft operators nor air traffic service providers shall be constrained in their choice of service provider or routing of ATS traffic exchange. –All service providers shall interconnect for the exchange of ATS traffic to provide a seamless connection between the airborne and ground domain. The LINK Programme is therefore acting to satisfy these requirements so that ARINC and SITA compete to offer both AOC and CPDLC services to their customers.

22 ICAO Bangkok November2003 Initial ATN Architecture ATN G/G Router ACSP Network Air Traffic Service Provider Airline ATN G/G Router ATN A/G Router VDL Mode 2 A B ATN G/G Router Communications Service Provider C FDPS

23 ICAO Bangkok November2003 SITA ATN Service SITA plans to launch ATN Service in support of the Link2000+ Pioneer Project by mid 2004 Lufthansa have committed 20 Airbus type aircraft with H/well CMU to be flying in mid 2004 and plan to use the SITA ATN Service Existing VDL AIRCOM provides coverage over majority of Western Europe airspace Deployment of ATN service requires integration of ground/ground and air/ground ATN Routers

24 ICAO Bangkok November2003 Communications Flows AOA ATN ACARS VGS RGS ACARS DSP Airline ACARS Host Data Communication Network AVLC LinkVDL2 Link ATN System ATN User Traffic ACARS User Traffic ATN Router

25 ICAO Bangkok November2003 Conclusions VDL Mode 2 AIRCOM is operational today Major airlines planning retrofitting their fleets to VDL/AOA VDL Mode 2 coverage is driven by AOC and ATS requirements VDL Mode 2 adopted by Link2000+ and the FAA CPDLC Programme as the initial subnetwork for CPDLC SITA is open to develop further VDL Mode 2 partnership arrangements with ATS Providers SITAs ATN Service planned to be launched mid for Link2000+

26 Thank you for your attention For further information please contact


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