ATN-2000

1
ATN-2000

• AOC Migration Strategy

Presented by Frank OConnor
2
AOC Data Link Needs

• Data Link is Essential to todays Aviation
• ACARS in use for AOC for over 20 years
• Rapid Growth in Data Link Usage
• Demand will soon Exceed Capacity of Current ACARS
  System
• New Application need More Efficient and Reliable
  communications
• ATN Provides a Network which can satisfy AOC
  Demands

3
ATN Benefits to AOC

• Digital Networks make more Effective Use of
  Available VHF Bandwidth
• Communications Protocols provide a far more
  Reliable Data Transfer Mechanism
• More Efficient Bit-Oriented Applications are
  supported
• Supports Legacy Applications
• Shared ATS and AOC Network

4
AOC/ATN Benefits to ATSOs

• Shared ATC/ATC Network is cost effective
• FANS-1 built over Existing ACARS Network
• Over 90 of ACARS Traffic is AOC
• Airlines Equipage with ATN for AOC
• Offsets Cost of ATC Equipage
• Fleet replacement and data link upgrades aids in
  ATC deployment
• AOC use of ATN Accelerates ATSOs use of Data Link

5
Standards

• ICAO SARPs defines Generic ATN Communication
  Service (GACS)
• ARINC-637 specifies the use of ACARS over ATN
  including FANS-1 Applications

6
Standards Validation

• Eurocontrol have Validated the GACS Protocol
• Eurocontrol Conducting further Tests to Validate
  ARINC-637

7
Migration Steps

• Migrate Directly to ATN
• OR
• Use AOA (ACARS over AVLC) as an intermediate step

8
ACARS over AVLC (AOA)

• Enables ACARS Traffic over the VDL Mode-2
  Infrastructure
• No Modification Required to
• Existing Legacy Airline Host Systems
• Existing Airborne Applications
• Modifications Required to
• Interface Airborne ACARS Router Modified with VDL
  Mode-2 Avionics
• Provide Gateway function between ACARS and VDL

9
ACARS over AVLC cont.

• Benefits
• Meets Immediate Need for Additional ACARS
  Bandwidth
• Justifies Deployment of VDL Mode-2 Network prior
  to ATN Availability
• Weaknesses
• Supports VDL Mode-2 but no additional ATN
  advantages
• Additional Equipage Cost to transition to ATN
• May Delay ATN Deployment
• Delays New Application Development

10
ACARS over ATN

• ATN and ARINC-637 Standard to support ACARS over
  ATN
• No Modification Required to
• Existing Legacy Airline Host Systems
• Existing Airborne Applications
• Modifications Required
• Airborne Interface between ACARS and ATN Router
• Gateway function between ATN Router and Hosts
  System

11
ACARS over ATN (cont.)

• Benefits
• More Efficient and Reliable than AOA
• Fully ATN Compliant provides for earlier
  deployment of new efficient bit-oriented
  applications
• Single step, no AOA Equipage Cost
• Weaknesses
• Product Availability

12
Industry Status

• AOA
• Comms. Service 2000/2001
• Avionics Announced
• ACARS over ATN
• ATN Comms. Service 2001/2002
• AOC Gateway Server Q2/2001
• AOC Airborne Software Q2/2001
• Avionics Availabilty Not Announced