Regional ATN Transition Planning

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Regional ATN Transition Planning
Presentation ATN 4.2 by H. Tran

• Varadero, Cuba
• May 2002

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Regional ATN Planning

• Establish an ATN Regional Task Force
• The Regional Task Force should develop an ATN
  Transition Plan for the CAR/SAM Region
• The Regional Task Force should be tasked to
  develop various regional ATN implementation
  related documents

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ATN Implementation Related Documents

• The following ATN Implementation issues need to
  be addressed by the regional ATN task force
• Regional ATN Routing Architecture Plan
• Regional ATN Addressing Plan
• Regional ATN AMHS Naming Plan
• Regional ATN NSAP Addressing Registration
• Regional AMHS ICD
• Regional BIS Router ICD
• Regional CNS FASID
• Regional ATN Transition Plan
• Regional ATN Routing Policy (IDRP)
• Regional Routing Policy (MTA)
• Regional Directory Services
• Regional System Management
• System Performance
• Security

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ATN Transition Plan

• Recommendation for a Three Stage ATN Transition
• Stage 1 - Upgrade Current/Existing Infrastructure
• Stage 2 - Establishment of a Ground ATN Backbone
  Router Network
• Stage 3 - Connectivity of User ATN Routers to the
  Backbone

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Stage 1 - Existing Infrastructure

• AFTN Infrastructure
• Based on point to point circuits
• Majority of Circuits are low speed 50 baud
  through to 9600bps
• Circuit Protocols range from no protocols through
  to COPB and X.25

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Current US/CAR/SAM/Mexico AFTN/VOICE Connections
US
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Current US/MEVA AFTN/VOICE Connections
USA
Bahamas
Cuba
Puerto
Cayman
Rico
Jamaica
Islands
a
Haïti
Republica
Dominican
Belize
Guatemala
Honduras
El Salvador
Nicaragua
Aruba
Curaçao
Costa Rica
Panama
Peru
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Current US/E-CAR AFTN/VOICE Connections
USA
Puerto
Rico
Anguilla
St Marteen
St Kitts
Antigua
Nevis
Montserrat
Guadeloupe
Dominica
Martinique
St Lucia
St Vincent
Barbados
Grenada
Venezuela
Trinidad

Guyana
Tobago
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Current US/REDDIG AFTN/VOICE Connections
USA
USA
Puerto Rico
Venezuela
Suriname
Trinidad
Colombia
Guyane
Guyana
Française

Tobago
Ecuador
Peru
Brasil
Bolivia
Paraguay
Chile
Uruguay
Argentina
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Current US/CAMSAT AFTN/VOICE Connections
USA
Cuba
Mexico
Cayman
Islands
Belize
Guatemala
Honduras
El Salvador
Nicaragua
Costa Rica
Panama
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Current CAR/SAM Region AFTN Data Speed
CAR/SAM/3-WP/18 APPANDIX A
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Current Regional Protocols
CAR/SAM/3-WP/18 APPANDIX A
About 90 None ATN supports protocols
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Stage 1 - Upgrade of Circuits

• ATN at present recommend to use Subnetworks to
  interface at X.25, Which require existing
  non-compatible AFTN circuits will need to be
  upgraded

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Stage 1 - Bandwidth Issues

• Overheads from each layer of the OSI stack will
  increase total message size as much as 94
  (standard AFTN message size using AMHS)
• Bandwidth for circuits will need to be increased
  substantially
• Minimum speed 9.6kbps is required for ATN AMHS
  application
• Recommend 64kbps or higher will need to be
  considered for the regional ATN backbone

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ATN Applications
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Stage 2 - ATN Backbone

• Selection of Locations based on Existing
  Inter-Regional Connections and Main Internal
  Connections
• Diversity for Backbone Connectivity within the
  CAR/SAM Region and Neighbouring Regions
• Minimum of 64kbps for Backbone Trunk Speeds

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Example ATN Regional Backbone
A
EUR Region
ASIA Region
B
C
D
E
F
G
H
AFI Region
I
CAR/SAM Region
Inter-Regional Trunk Connection Intra-Regional
Trunk Connection
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Example CAR/SAM ATN Routing
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Stage 3 - ATN Connectivity

• Generally ATN Routers will connect to the ATN
  Backbone
• In some cases ATN Routers will connect to other
  ATN Routers to get to the ATN Backbone

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AFTN to AMHS Transition

• For the very first time there is now an
  alternative to the replacement of an AFTN system -

AMHS

• Transition to AMHS can involve a number of steps
• Introduction of AFTN/AMHS Gateways.
• To full AMHS Interconnection between States.

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Current AFTN Environment
AFTN System
X.25
Low Speed
Low Speed
AFTN System
AFTN System
X.25
X.25
AFTN System
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Implementation of AFTN/AMHS Gateways
AFTN System
Site B
Low Speed
Low Speed
AFTN System
X.25
X.25
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Migration to AMHS - 1
Domestic AMHS Systems
Domestic AMHS Terminals
ATN Router
AMHS System
Site B
Domestic Network
AFTN System
ATN Router
AMHS Gateway
Site C
AMHS System
ATN Router
X.25
AMHS Gateway
X.25
AFTN System
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Migration to AMHS - 2
Domestic AMHS Systems
Domestic AMHS Terminals
ATN Router
AMHS System
Site B
Domestic Network
ATN Router
AMHS System
Site C
AMHS System
ATN Router
AFTN System
ATN Router
AMHS Gateway
Site D
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Full AMHS Implementation
Domestic AMHS Systems
Domestic AMHS Terminals
ATN Router
AMHS System
Site B
Domestic Network
ATN Router
AMHS System
Site C
AMHS System
ATN Router
ATN Router
AMHS System
Site D
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Current ATN Trials Infrastructure In Europe
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ATN Asia Regional Backbone Plan
EUR Region
NAM Region
MID Region
AFI Region
Asia Region
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Asia/Pacific ATN Routing Plan
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ATN G/G ApplicationsAIDC

• The AIDC will automatically exchange ATC
  information between ATSU, in support of the ATC
  functions
• NOTIFICATION of flights approaching an FIR
  boundary,
• CO-ORDINATION of boundary crossing conditions,
• TRANSFER of control at the FIR boundary.

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AIDC Overview
Aircraft Flight
ATN
AIDC
BIS
ES
ES
Legend AIDC ATS Inter-facility Data
Communication BIS Boundary Router ES End
System FIR Flight Information Region
AIDC
AIDC
BIS
BIS
ES
ES
AIDC Flight notification, coordination, and
transfer between FIRs
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AIDC Implementation

• ATN AIDC is not Compatible with AIDC over AFTN
• Implementation of ATN AIDC will need to be
  implemented by arrangement between both parties
• Possible phased implementation can be AIDC over
  AFTN to AIDC over AMHS

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AIDC Over AMHS
AIDC End System
AIDC End System
Domestic Network
Domestic Network
AMHS System
ATN Router
ATN Router
AMHS System
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Conclusions

• ATN is a policy agreed among ICAO member states
• Implement new links or Upgrade existing AFTN
  links where appropriate to be compatible with ATN
  protocols
• Plan for adequate bandwidth which can be
  increased without restriction
• Each Region needs to developed its own
  implementation plan and related documents to
  address its own regional environment
• Interim arrangements can be set up between
  States/Organizations which can provide ATN
  service or gateway