Download ATN-2000

The Future
of
PETAL Technology
Frank O’Connor
ATN 2001 18th September 2001
PETAL-II Datalinks
SAS, Lufthansa
American Airlines
SRA, ANZ, UAL, DLH,
QFA, SIA, ACA, COA
NEAN
ATN
FANS-1/A
(VDLM4)
(VDLM2)
(ACARS)
Maastricht
ATN Concept
– ATN is a Mobile Aviation Internetwork which
• Provides Communications support for ATC and AOC
traffic
• Interconnects Airborne and Ground Systems
• Provides High Availability, Prioritisation and other
features required to support ATC traffic
• Provides a strategy for Integration of different types of
Networks
• Integrates with and complements existing network
infrastructure
• Re-uses existing products and technology
– ATN also Defines a set of CNS/ATM specific
applications
ATN Distinguishing Features
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–
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–
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Mobile Routing
Enhanced End-to-End Data Integrity
Priority and Pre-emption
Traffic Type (Security Parameter) Identification
Policy Based Routing
Air/Ground Datalink Compression
Bit-Oriented Application Support using
condensed Packed Encoding Rules (PER)
– Certified Software
ATN Technology Origins
• International Standards Based
– OSI was Governmental Standard when ATN
Standards Development began
• Re-Use where Practical
– Existing Standards and Technologies
– Existing Infrastructure and Products
• Extend Standards where Necessary
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Air/Ground Segment
Mobility
End-to-End Reliability
CNS/ATM Specific Applications
ATN Unique Protocols and Standards
– ATN Application Service Elements for:
• CM
• CPDLC
• ADS
– Mobile SNDCF and associated IS-SME
– Connected Oriented (v8208) Network Circuit
between Airborne Router and Ground System
ATN Re-use/Extension to Standards
(cont.)
– ATN Addressing Plan to provide unique
addressing for ATN Airborne and Ground
Systems
– ATN Router (Intermediate System) Protocols
• Networking Protocols adapted to support Mobile
Internet
• OSI Routeing Exchange Protocols Extended to support
Mobility, Prioritisation and Traffic Types
– IDRP (Inter-Domain Routeing Protocol)
– ES-IS (End-System to Intermediate System Protocol)
• CLNP (Connectionless Network Protocol) extended to
support traffic type and prioritisation
• v8208 (8208 extended for VDL use)
• Policy Based Routing
ATN Re-use/Extension to Standards
– ATN End-System Protocols
• Provide the Airborne and Ground Applications with an
ATN Interface to enable communication between them
• Dialogue Service Specified over Fast Byte Upper Layer
Communications Services
• Transport Protocol(COTP/CLTP) enhanced to provide
end-to-end integrity, and traffic type support
Why IP is not used instead of OSI
– OSI was a Governmental Standard when ATN
Development started
– OSI has some advantages but a change to
TCP/IP would be a major cost that cannot be
technically or economically justified
– New SARPS would need to be developed
– IP Protocols would need to be extended in the
same way as OSI to provide Mobility, End-to-End
Integrity …..
– Certified Products would need to be developed
ATN Datalink Components in PETAL
• Avionics Systems
• VDL Mode-2 Ground Infrastructure
• Maastricht ATC Systems
PETAL ATN Datalink Components
Rockwell Collins Avionics
CMU
VDR
Mode-2
CM/CPDLC
Apps.
Air ATS
ES Stack
Airborne
Router
VDL-M2
Gnd Station
Air/Gnd
Router
ARINC VDLM2
Ground Infrastructure
Gnd/Gnd
Router
Gnd/Gnd
Router
Gnd ATS
ES Stack
Maastricht
FDPS
Avionics Systems
• Rockwell Collins CMU-900
– Airborne ATN Router
– Airborne End-System Stack
– CM/CPDLC Applications
• VDR (Mode-2)
• MCDU
Airborne Router
– Establishes/Releases Mobile Connections to
Air/Ground Routers over Available Sub-networks
– Relays Data between the Aircraft and Air/Ground
Routers, handling compression
– ATN/OSI Technology include:
• Mobile Routeing Protocols
– IS-SME
– ES-IS
– IDRP
• CLNP (Connectionless Network Protocol)
• Mobile SNDCF
• v8208 Sub-network Support
Airborne End-System Stack
– Provides the Airborne Applications with an ATN
Interface to enable communications with the
Ground System Applications
– ATN/OSI Technology include:
• CM & CPDLC ASEs (Application Service Elements)
• Upper Layer Communications Services
• COTP (Connection Oriented Transport Protocol)
VDL Mode-2 Ground Infrastructure
• VDL M2 Ground Stations
• ATN Air/Ground Routers
• ATN Ground/Ground Routers
• Infrastructure Interconnections
VDL Mode-2 Ground Stations
– Controls the Establishment/Release of VDL Links
between Airborne and Ground Radios
– Integrates the Ground VDRs with the Ground
Networks by acting as a bridge
– Interfaces with the Air/Ground Routers
– ATN/OSI Technology:
• v8208 to provide connection-oriented VDL network link
• 8208 to provide connection to Air/Ground Router
Air/Ground Routers
– Keeps track of Aircraft connected to it and
handles Mobility and Hand-over between Aircraft
– Propagates Routing Information using IDRP
– Relays Data between Aircraft and Ground
Network
– ATN/OSI Technology:
• Mobile Routeing Protocols
– IS-SME
– ES-IS
– IDRP
• CLNP (Connectionless Network Protocol)
• Mobile SNDCF
• 8208 Sub-network Support
Ground/Ground Routers
– Propagates Routing Information for Aircraft and
Ground system throughout Network using IDRP
– Relays Data between Ground Systems
– ATN/OSI Technology:
• IDRP Routeing Protocols
• CLNP (Connectionless Network Protocol)
• 8208 and other Sub-network Support
Infrastructure Interconnections
– Interconnections between Ground systems such
as VDL Ground Stations, Ground/Ground
Routers and End-System was accomplished
using existing networks and products.
– The networks used include:
• IP and OSI LANs
• X.25
• Other underlying networks used by telecom service
providers
Maastricht ATC Systems
• ATIF Ground/Ground Router
• ATIF End System Stack
• Flight Data Processing System
Maastricht ATIF Ground/Ground Router
– Propagates Routing Information to/from External
Networks
– Relays Data between Ground ATC Centre and
External Networks
– ATN/OSI Technology:
• IDRP Routeing Protocols
• CLNP (Connectionless Network Protocol)
• 8208 and other Sub-network Support
Maastricht ATIF End-System Stack
– Provides the ATC Applications with an ATN
Interface to enable communications with the
Aircraft Applications
– ATN/OSI Technology include:
•
•
•
•
CM & CPDLC ASEs (Application Service Elements)
Upper Layer Communications Services
COTP (Connection Oriented Transport Protocol)
CLNP (Connectionless Network Layer)
Airtel ATN’s Involvement
– Airtel ATN was originally part of Retix, an OSI
COTS Software Supplier
– Retix Supplied OSI Software for Early ATN
Prototype such as EURATN
– Retix developed the TAR, TTS and Airborne TAR
for Eurocontrol in support of ATIF and European
ADS Trails based on Re-Use of COTS Software
– Airtel developed Airborne CM, CPDLC and ADS
applications used in pre-PETAL trials
– TAR, TTS and Airborne TAR/TTS used in prePETAL trails on QinetiQ (DERA) BAC-111 and at
Eurocontrol (Bretigny) site
Airtel ATN’s Involvement (cont.)
– The Extended and Enhanced Retix OSI COTS
software is incorporated into the following PETAL
systems:
• Rockwell Collins CMU-900 ATN Router and Upper
Layer Communication Services
• ARINC Air/Ground and Ground/Ground ATN Router
Software
• ProATN Ground/Ground Routers and End-Systems
used in the Maastricht centre
Future Direction of
ATC Datalink Technologies
– Co-existence of ATN/IP
• IP and ATN Traffic sharing same networks and datalinks
where permitted
• IP used for Airline and Passenger Communications
• Standardised IP Sub-network to enable use of existing
public and private IP networks within the ATN
– Additional Sub-Network Support
•
•
•
•
VDLM4/VDLM3 as ATN Sub-Networks
Spread Spectrum CDMA
SATCOM Broadband Network
Wireless LAN Gatelink
Future Direction of
ATC Datalink Technologies (cont.)
– Security
• Utilise Industry Standard PKI (Public Key Encryption)
Techniques, Procedures and Products
• Authentication of Mobile Systems (Aircraft) by DSP and
ATSO
• End-to-End Confidentiality and Non-Disclosure