Latin America and Caribbean

ATN/VDL Mode 2 Implementation

Status

CAR/SAM ATN/GNSS Seminar

Varadero, CUBA

May, 6 to 9

Presentation ATN 3.1 by A. MattosPresentation ATN 3.1 by A. Mattos

Presentation Overview

• ACARS Overview• ATS use of ACARS• FANS 1/A Services• ACARS to ATN Transition• VDL Mode 2 deployment• ATN Ground Applications: AMHS plans • AIRCOM ATN Services

SITA Aircraft Data Link Service• Creation of SITA in 1949 by airlines to provide them with

shared network services.

• Expansion of data network coverage VHF AIRCOM ground stations Satellite AIRCOM INMARSAT ground stations

• The AIRCOM Data Link Service provides aircraft with a means to exchange data with airline systems and ATS application systems connected to the SITA terrestrial network.

• Today SITA provides ACARS services to over 5,000 acft for AOC comms. On average we provide services to 3,000 acft daily that exchange in excess of 350,000 mesages

VHF AIRCOM Coverage

Satellite AIRCOM Coverage

SITA AIRCOM Services

• SITA provides AIRCOM Data Link service for use by Aircraft Communication Addressing and Reporting System (ACARS) avionics.

Plain Old ACARS (POA) ACARS Over Aviation VHF Link Control (AVLC)

(AOA) Internetworking

AIRCOM ATS Services

• According to IATA estimates, there are about 1200 FANS 1/A equipped aircraft.

• 20 ATS providers around the world are providing/planning to provide FANS 1/A based services

• On regional context the following airlines have datalink capabilities:– TAM, LANCHILE, COPA, MEXICANA, ACES,

AIR JAMAICA, TACA, MARTINAIR, VARIG.

AIRCOM ATS Services

• Sets of data link applications using ACARS: “Pre-FANS” applications that use only the basic

text messaging capability of the ACARS avionics:Departure Clearance (DCL) and Oceanic Clearance

(OCL)Automatic Terminal Information Service (ATIS)

The FANS applications which require special processing capability in the user aircraft: Automatic Dependent Surveillance (ADS)Controller Pilot Data Link Communications (CPDLC)

ATC Facilities Notification (AFN)

AIRCOM Use for ATC Clearances

FlightPlanProcessingSystem

3

1

4

5

CLEARANCE REQUEST

POSITIVE ACK

CLEARANCE ACQUISITION

CLEARANCE MESSAGE

2

ACARSAVIONICS

CLEARANCE ACK

AIRCOM use for Digital ATIS

Voice ATISVHF 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.

SITA DCL/ATIS Customers

•France

•Switzerland

•Portugal

•Spain

•Germany

•Sweden

•Austria

•Denmark

•Norway

•Singapore

•Hong Kong

•South Korea

•Australia

•Bahrain

•Ivory Coast

•Greece

•United Kingdom

AIRCOM use for FANS-1/A ADS/CPDLC

SatelliteAIRCOM

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

SITA FANS Customers

•US FAA•Australia•France (Tahiti)•Fiji•South Africa•Eurocontrol•Egypt•Iran•Uzbekistan

•Singapore•India•Myanmar•Mongolia•Hong Kong•South Korea•Sri-Lanka•Madagascar

ACARS to ATN Transition

• As part of LINK 2000 (the Eurocontrol Link Program Steering Group)an industry group lead by Boeing was formed with the objective of examining ways to accommodate FANS 1/A aircraft in ATN Baseline 1 airspace, to provide ATS providers with aircraft to justify investment and maintain progress on domestic datalink infrastructure investment

• To support FANS-1/A aircraft in ATN airspace IRRF has considered a solution based in two kinds of gateways: internal and external.

• The gateway provides the fundamental mechanism for ATN-based ATS Providers to communicate with FANS-1/A aircraft, and vice versa

• SITA is actively involved with IRRF group in order to develop/provide an external gateway

Domestic FANS with External Gateway

FMSor ATSU

RadioMU or CMU A/G Network

MessageProcessor

GroundStation

G/GCharacterNetwork

ATN

Gateway

ATNRouter

ATN ATCEnd System

Link Layer- VHF ACARS- VDL (AOA)

ACARS 618 Protocol (Air/Ground)- Agency (/FI)- Label

FANS 1/A Protocols (ARINC 622)-AFN, ADS, CPDLC- Aircraft ID or Callsign as filed in flight plan- ATC Facility Designator, 4-letter ICAO code

FANS 1/A Aircraft ATC Facility

A

B

D

ARINC 620

C

ATNProtocols- DLIC/CM, ADS, CPDLC

E

Connection-Oriented Transport Protocol (TP4)Connectionless Network Protocol (CLNP)

F

VHF ACARS to VDL transition

ICAO VHF Digital Datalink (VDL)• Mode 2

ACARS replacement ATN compatible SARPS were included in Annex 10 in Nov1997 3Kbits/s throughput for ATC use transition solution

• Mode 3• Mode 4

VHF ACARS to VDL transition

• SITA will increase VHF AIRCOM data link capacity by introducing VHF Digital Link Mode 2 service providing 10-20 times more capacity per channel.

• Industry has defined the “ACARS over AVLC” (AOA) standard as a means to operate existing ACARS applications over the VDL 2 network

SITA is currently trialling the AOA service with a major European Airline

The VGS (VDL Mode 2 and ACARS capable) has been delivered in October 2000 and deployment started beginning in January 2001

ATN Ground Applications: AMHS Plans

• SITA is planning to build an Aeronautical Message Handling Service (AMHS) that fully complies to the ICAO ATN AMHS Standards and Recommended Practices

• SITA is assessing ATS provider requirements for introduction and use of AMHS services in order to determine when the service should be rolled out

• SITA can provide either a back-up or primary AMHS service

ATN Ground Applications: AMHS Plans

• ATS ground-to-ground communications are increasingly using generic telecommunications services e.g

– the FAA Telecommunications Infrastructure (FTI) initiative to replace the FAA’s leased lines with a Frame Relay and ATM backbone

– the Eurocontrol CFMU regional IP service to support the Enhanced Tactical Flow Management System

• SITA encourages ATS providers to consider providing AMHS services over an IP network service, ATN ground/ground routers are not essential for AMHS services

AIRCOM ATN Services

VDL Mode 2/ATN• VDL/ATN will support the ICAO ATN CM, CPDLC, ADS,

and FIS applications• Launch September 2002• Successful Flight tests with Eurocontrol January 2002-

CPDLC messages exchanged end-to-end • VHF Ground Stations (VGS) POA/AOA/ATN Capable

Deployment in 2002GACS Gateway (Genereric ATN Com Service)

• permits legacy ACARS applications to use an ATN service• provides ATN interface for new binary (AOS & ATS)

applications• SITA is working with Eurocontrol, BA and LH on GACS

trialsAeronautical Mobile Satellite Services (AMSS) Data-3

• Suports connection to ATN network

By concluding...

• SITA works with the ATS providers developing data link applications to ensure they are accessible to the AIRCOM customer airlines.

• SITA encourages the use of the existing ACARS AIRCOM infrastructure to the ATS providers for initial ATS datalink applications (D-ATIS, DCL, OCM, FANS 1/A)

• ATC providers implementing CPDLC services will have to offer them to ATN and FANS-1/A equipped aircraft to have a significant impact on airspace capacity by 2005

• SITA is willing to work/partner with ATS providers to support plans and trials for ACARS based ATS applications and ATN service provision including AMHS

Gracias por su atención!!!!