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ATN ‘99, London, 23 September 1999 David Russell ATS Market Manager, SITA AIRCOM SITA AIRCOM Data Link Service.

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Presentation on theme: "ATN ‘99, London, 23 September 1999 David Russell ATS Market Manager, SITA AIRCOM SITA AIRCOM Data Link Service."— Presentation transcript:

1 ATN ‘99, London, 23 September 1999 David Russell ATS Market Manager, SITA AIRCOM SITA AIRCOM Data Link Service

2 ATN ‘99, London, 23 September 1999 Summary Development of SITA Aircraft Datalink. History ACARS Data Link How ATC uses Datalink today. Services Implementation Support The future of Datalink. Capacity - VDL. The need for ATN. Implementation Schedule. SITA ATN Services.

3 ATN ‘99, London, 23 September 1999 History The airlines created SITA in 1949 to provide them with shared network services. SITA established an integrated data (and now digital voice) network, with access points in over 220 countries.

4 ATN ‘99, London, 23 September 1999 History From 1985, SITA expanded data network coverage to aircraft by: – deploying VHF AIRCOM ground stations and – establishing links to the Satellite AIRCOM INMARSAT ground stations. The AIRCOM Data Link Service provides aircraft with a means to exchange data with airline systems connected to the SITA terrestrial network.

5 ATN ‘99, London, 23 September 1999 ACARS Data Link SITA provides AIRCOM Data Link service for use by Aircraft Communication Addressing and Reporting System (ACARS) avionics. The AIRCOM Data Link service is used by over 4,000 aircraft, belonging to over 90 airlines.

6 ATN ‘99, London, 23 September 1999 VHF AIRCOM Coverage (end 1999)

7 ATN ‘99, London, 23 September 1999 How ATC uses Datalink today ATC Datalink. Clearance Services. D-ATIS Services. FANS-1/A Services. Support to ATC Datalink implementation.

8 ATN ‘99, London, 23 September 1999 ATC Data Link With the ICAO adoption of the FANS CNS/ATM concept, SITA began working with ATC agencies to define ATC Data Link services. SITA participates in the development of ATC data link standards and performance requirements. SITA offers AIRCOM ACARS network access to ATC agencies implementing initial data link services.

9 ATN ‘99, London, 23 September 1999 AIRCOM Use for ATC Clearances CLEARANCE SYSTEM IN ATC CENTRE AIRCOM SERVICE PROCESSOR Flight Plan Processing System CLEARANCE REQUEST POSITIVE ACK CLEARANCE ACQUISITION CLEARANCE MESSAGE 2 ACARS AVIONICS CLEARANCE ACK

10 ATN ‘99, London, 23 September 1999 AIRCOM use for Digital ATIS Voice ATIS VHF Ground Station VHF AIRCOM Ground Station SITA Datalink Service Processor routes ACARS messages containing ATIS requests between aircraft and the ATIS ground system Datalink ATIS and digitised voice ATIS are provided by the same system ensuring identical information is provided by both means.

11 ATN ‘99, London, 23 September 1999 AIRCOM use for FANS-1/A ADS/CPDLC Satellite AIRCOM VHF AIRCOM Ground Station SITA ACARS Processor uses the address entered by the airborne system to route messages to the destination FANS-1/A ground system. FANS-1/A Ground System ADS/CPDLC ACARS Convergence Function FANS-1/A ADS/CPDLC ACARS Convergence Function ACARS Management Unit VHF Transceiver Satellite Data Unit SITA Network

12 ATN ‘99, London, 23 September 1999 ATC Data Link Implementation SITA supports ATS provider tests of their data link applications to measure the performance and to define procedures for their use. SITA has introduced enhancements such as direct X.25 access for ATC ground systems to resolve performance issues with the teletype access network.

13 ATN ‘99, London, 23 September 1999 ATC Data Link Implementation Eurocontrol is using the SITA AIRCOM service in the PETAL II tests for Maastricht ATC to exchange CPDLC messages with FANS-1/A equipped aircraft. PETAL II demonstrates that an ATN compliant CPDLC ground system can communicate with aircraft equipped with either FANS-1/A or ATN CPDLC.

14 ATN ‘99, London, 23 September 1999 Future of SITA Datalink Capacity - VDL. The need for ATN. Implementation Schedule. SITA ATN Services.

15 ATN ‘99, London, 23 September 1999 Capacity - VHF ACARS to VDL The VHF ACARS networks in the high density airspace of Europe and the USA cannot support increased traffic. While more VHF frequencies may be available for VHF ACARS in USA, there are none available in Europe.

16 ATN ‘99, London, 23 September 1999 SITA will increase VHF AIRCOM data link capacity by introducing VHF Digital Link Mode 2 service providing times more capacity per channel. SITA has contracted with Harris corporation to develop a VHF Ground Station (VGS), providing VDL Mode 2 and VHF ACARS service, for delivery in Capacity - VHF ACARS to VDL

17 ATN ‘99, London, 23 September 1999 The need for ATN To meet the predicted increase in aircraft movements ATS Providers seek affordable and sustainable growth in airspace capacity to meet (reducing) delay targets. Increased air traffic will be supported by migrating from voice to data comms, leading to an exponential rise of ATC datalink usage.

18 ATN ‘99, London, 23 September 1999 The need for ATN Airlines Seek: –Increase operational efficiency, –Increase operational flexibility, –To take advantage of increased aircraft automation. Airlines need a single, global standard to ensure that the same avionics can be used world-wide.

19 ATN ‘99, London, 23 September 1999 ATN Implementation Schedule The earliest plan to implement operational ATN CPDLC service is the FAA CPDLC Build 1 in July ATC host upgrade cycles indicate that ATN CPDLC cannot be implemented operationally in Europe before Certified ATN applications will be integrated into production avionics around 2002, airline fleet equipage will ramp up after this date.

20 ATN ‘99, London, 23 September 1999 Potential transition paths identified in Link 2000+

21 ATN ‘99, London, 23 September 1999 SITA ATN Subnetwork Services Satellite AIRCOM support for ATN communications has been demonstrated in the ADS Europe project. The SITA VDL ground station will support ATN/VDL sub-network service. SITA will also offer ACARS over AVLC (AOA) service to promote the installation of avionics platforms designed to support a full ATN implementation.

22 ATN ‘99, London, 23 September 1999 SITA ATN Routing Services SITA developed an ATN Router as a partner in ProATN and its predecessor, the EurATN project. SITA will provide operational ATN routing services based on the ATNSI / ACI Router Reference Implementation. SITA has agreed to contribute financially to the ATNSI development of the ATN/VDL interface.

23 ATN ‘99, London, 23 September 1999 Conclusions ATC agencies are implementing ATN to increase airspace capacity in response to increasing demand. SITA will support this objective by enabling CPDLC services to be offered to the widest possible range of datalink equipped aircraft.


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