FAA/JCAB ATN & AMHS Trial
Varadero, Cuba
May 2002
Presentation ATN 3.2 by H. TranPresentation ATN 3.2 by H. Tran
FAA/JCAB ATN/AMHS Trial
US FAA and the Japan JCAB agreed on a trial of the ATN routers and the AMHS, as defined by the International Civil Aviation Organization (ICAO) ATN Panel
ATN Router connectivity trial between U.S. and Japan started on September 2000
Interoperability trial between the U.S. AMHS and the Japan AMHS, scheduled from January to November 2001
AMHS will process ATS messages (e.g. Flight Plans, NOTAMs, etc…) and transmit to its end users.Each AMHS will only process messages for its end users in its own domain.• AMHS will function in “bypass mode” for transient
messages.
Several administrative domains may share a single AMHS.AMHS also performs as a gateway for AFTN/CIDIN, as required.
ATN AMHS Applications
AMHS Concept
ATN End System
AFTN/AMHS Gateway
AFTN StationAFTNATN
AMHS
AFTN
ATSMHS Traffic FlowATN End System
AFTN/AMHS Gateway
AFTN Station
FAA/JCAB ATN/AMHS Trial Objectives
ATN BIS Router Compatibility TestsEnsure the routers could successfully
communicate in an operation environment using prescribed ATN protocols (IDRP, CLNP).
FAA/JCAB ATN/AMHS Trial Objectives
AMHS Software Tests Validate the operation of the AMHS software as
defined in the ATN Standards and Recommended Practices (SARPs),
Demonstrate the ability of AMHS software to communicate with AFTN and ATN routers,
Verify the interoperability between the US AMHS software product and the Japanese AMHS software product.
FAA/JCAB Trial Configuration
ATN Trial(9.6 Kbps)
4 voice lines(8 Kbps/line)
64 Kbps
MUX MUX
AFTN
4 voice lines(8 Kbps/line)
ATN Trial(9.6 Kbps)
NADINPSN
AFTN
AFTN(9.6 Kbps)
MSN
TOKYO OAKLAND
SALT LAKE CITY
JAPANJCAB
USFAA
ATN BISROUTERS
ATN BISROUTERS
AMHSs
AMHSs
AFTN(9.6 Kbps)
FAA TECHNICAL CENTER
FAA Technical CenterRouting Domain
ES 1
BIS Router
BIS
Ethernet
JCAB IDEC Routing Domain
ES 2
BIS Router
IDRP
Ethernet
FAA/JCAB ATN BIS Routers Trial Configuration
IDRP, CLNP
Using X.25 subnetwork
FAA/JCAB ATN BIS Routers Trial Procedure
1 1 Data link establishment between ATN routers
2 VC establishment between ATN routers
3 BIS connection establishment between ATN routers
4 UPDATE PDU transmission
2 1 KEEPALIVE PDU transmission
Test Item Description
FAA/JCAB ATN BIS Routers Trial Procedure
Test Item Description
3 1 ERQ NPDU transmission from JCAB ATN router
2 ERQ NPDU transmission from FAA ATN router
3 ERQ NPDU transmission from JCAB simulated ES.
4 ERQ NPDU transmission from FAA simulated ES.
5 ERQ NPDU transmission from JCAB simulated ES to unreachable simulated ES on FAA side
FAA/JCAB ATN BIS Routers Trial Procedure
Test Item Description3 6 ERQ NPDU transmission from FAA simulated ES to unreachable
simulated ES on JCAB side
7 Routing process in JCAB ATN router for NPDU with invalid security option parameter
8 Routing process in FAA ATN router for NPDU with invalid security option parameter
4 1 Manual disconnection and manual establishment from JCAB ATN router
2 Manual disconnection and manual establishment from FAA ATN router
FAA/JCAB ATN BIS Routers Trial Procedure
Test Item Description
5 1 Circuit failure and restoration in JCAB ATN router
2 Circuit failure and restoration in FAA ATN router
3 Line switching in JCAB ATN router
FAA/JCAB AMHS Trial Configuration
MUX ATN Router
AMHS
FAA Technical Center IDEC
ATN Router AMHS
AFTN
AFTN
Tokyo Oakland
9.6 kbps
MUX
FAA AMHS Architecture
MTA C
Mail Box
ControlPosition
AFTNProcessor
ASMTP
AMHSPop3
X.25
IncomingMessage
OutgoingMessage
AFTNMessage
MTA
MTA (Message Transfer Agent) CSend out ATN Message
MTA DListen incoming message
AFTN (Aeronautical Fixed Telecommunication Network)Handle message to control position
AMHS (ATN Message Handling System) Pop3Retrieve email message
ASMTP (ATN Simple Mail Transfer Protocol)Handle incoming and outgoing local email message
MTA D
AMHS Message
User Agent
FAA/JCAB AMHS Trial Procedure
1 Confirmation of the Transport Layer Connection
2 Confirmation of the Upper Layer Connection
3 Confirmation of the Transmission/Reception of AFTN Messages
4 Confirmation of the Error Cases
5 Confirmation of the Parameters of Transport Layer
6 Confirmation of the Parameters of Upper Layers
Test Item Description
Trial Schedule
ATN BIS Router TestCompleted by September 2000
AMHS Software Test Started January 2001 and ended
November 2001
Test Results
ATN BIS Routers Tests provided positive results that
validated the interoperability capability of the routers.
The test validated that BIS router using X.25 sub-network to support ATN IDRP and CLNP protocols were performed as defined in the SARPs.
Test Results (Cont’d)
AMHS SoftwareTest demonstrated transport layer
connection and upper layer connection interoperability
Minor adjustments were required, and successfully implemented, to satisfy the requirement of receiving maximum length AFTN messages.
FAA/JCAB Transition to ATN Architecture, 2003
ATN Trial(9.6 Kbps)
4 voice lines(8 Kbps/line)
64 Kbps
MUX MUX
AFTN
4 voice lines(8 Kbps/line)
ATN Trial(9.6 Kbps)
NADINPSN
AFTN
AFTN(9.6 Kbps)
MSN
TOKYO OAKLAND
SALT LAKE CITY
JAPANJCAB
USFAA
ATN BISROUTERS
ATN BISROUTERS
ATN BISROUTERS
AMHSs
AMHSs
NADIN MSN Panel
NADIN MSN Processor with GPS Time Code
NADIN MSN Area
The NADIN MSN Mockup
ATN Router and AMHS
Conclusions
The immediate benefits of US FAA/Japan JCAB ATN Trials include the following: Successful demonstration of ATN operational
concepts Interoperability of the ATN routers and AMHS
software Lessons learned for development of ATN router and
AMHS Interface Control Documents (ICD) Experience to support the successful deployment of
an ATN router network using AMHS