FAA/JCAB ATN & AMHS Trial Presentation ATN 3.2 by H. Tran Varadero, Cuba May 2002

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

ATN AMHS Applications 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.

AMHS Concept ATSMHS Traffic Flow AFTN Station AFTN Station ATN End System AFTN AFTN/AMHS Gateway AFTN/AMHS Gateway ATN AFTN AFTN Station AFTN Station AMHS ATSMHS Traffic Flow ATN End System

FAA/JCAB ATN/AMHS Trial Objectives ATN BIS Router Compatibility Tests Ensure 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 JAPAN JCAB US FAA FAA TECHNICAL CENTER OAKLAND TOKYO ATN BIS ROUTERS 4 voice lines (8 Kbps/line) 4 voice lines (8 Kbps/line) AFTN (9.6 Kbps) 64 Kbps MUX MUX AMHSs AFTN ATN Trial (9.6 Kbps) AFTN ATN Trial (9.6 Kbps) MSN SALT LAKE CITY NADIN PSN AFTN (9.6 Kbps) ATN BIS ROUTERS AMHSs

FAA/JCAB ATN BIS Routers Trial Configuration Ethernet Ethernet ES 2 IDRP ES 1 BIS Router IDRP, CLNP BIS Router Using X.25 subnetwork BIS JCAB IDEC Routing Domain FAA Technical Center Routing Domain

FAA/JCAB ATN BIS Routers Trial Procedure Test Item Description 1 Data link establishment between ATN routers 2 VC establishment between ATN routers 3 BIS connection establishment between ATN routers 4 UPDATE PDU transmission KEEPALIVE PDU transmission

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 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 Description 3 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 9.6 kbps AFTN AFTN AMHS ATN MUX MUX ATN AMHS Router Router IDEC Tokyo Oakland FAA Technical Center

FAA AMHS Architecture Outgoing Message MTA (Message Transfer Agent) C Send out ATN Message MTA D Listen incoming message AFTN (Aeronautical Fixed Telecommunication Network) Handle message to control position AMHS (ATN Message Handling System) Pop3 Retrieve email message ASMTP (ATN Simple Mail Transfer Protocol) Handle incoming and outgoing local email message MTA C AFTN Control X.25 Processor Position AFTN Message MTA D Incoming Message ASMTP User Agent Mail Box AMHS Message AMHS Pop3 MTA

FAA/JCAB AMHS Trial Procedure Test Item Description 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

Trial Schedule ATN BIS Router Test AMHS Software Test Completed 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 Software Test 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 JAPAN JCAB US FAA OAKLAND TOKYO 4 voice lines (8 Kbps/line) 4 voice lines (8 Kbps/line) 64 Kbps MUX MUX ATN Trial (9.6 Kbps) ATN Trial (9.6 Kbps) AFTN NADIN PSN MSN AFTN AFTN (9.6 Kbps) SALT LAKE CITY ATN BIS ROUTERS ATN BIS ROUTERS AMHSs AMHSs ATN BIS ROUTERS

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