ATNS - 6/7

Agenda Item 6: Planning and Implementation Considerations

ASIA/PACIFIC REGIONAL ATN TRANSITION PLAN

(Presented by Australia)

International Civil Aviation Organization

ATN Seminar and Third ATN Transition Task Force Meeting

Singapore, 26-30 March 2001

Asia/Pacific Regional ATN Transition Plan

Asia/Pacific Regional ATN Transition Plan

ATN Seminar Singapore, 26th - 27th March 2001

Slide 2

ATNTTF Working Group BATNTTF Working Group B

� Established to develop the ATN Ground-Ground Transition Plan for the Asia/Pacific Region

� WG/B Include Representatives from:– Australia– Hong Kong China– Singapore– Thailand– United States

Slide 3

ATN Transition PlanATN 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

Slide 4

Stage 1 - Existing InfrastructureStage 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

Slide 5

Asia/Pacific AFTN TopologyAsia/Pacific AFTN Topology

Mala ysiaKota K inabaluWBKK

Brunei

WBSB

Uzebekistan (UTTT)

Bahrain (OBBI)

INTERNATIONAL AFTN - ASIA PACIFIC

Tuvalu

PNGPort Moresby

American Samoa

NSTU

NGTA

French Polynesia

NTAA

Canada (C)

Sth Ame rica (S)

ChileSantiagoSC,SA

Europe (E,L)

-> Y,A,K,N,R,P,V,W,Z<- F

<-W(ex WA,WI,WP,WR)D,G,H,O,R,U,V,Z->Y,A,F,N

Tonga

NFTTF

Oman (OOMS)

Zimbabwe (FV)

Botswana (FB)South A frica (FA)Malawi (FW)Madagascar (FM)Seychelle s (FS)Ga bon (FO)Swaziland (FD)

CambodiaPnom PenhVDPP

Myanmar

VYYY VietnamHanoiVVVVLaos

VientianeVLVT

Japan

Ryukyu IsROAH

TaiwanTaibeiRCTP

Ne w Caledonia

NWWW

Fortuna & Wallis IsNLWW

AYPY

Bangladesh

VGZRBhutan

VQPR

Kuwait(OKBK)

ChinaGuangzhouZGGG

Hong KongVHHH

Sth KoreaSeoulRKSS

Russian FederationKhabarovskUHHH

Europe Rome (LIII)

Europe London (EGGG)

Kenya Nairobi (HK,D,F,G)

IndiaChennaiVOMM

VietnamHochiminhVVTS

MalaysiaKuala LumpurWMKK

ThailandBangkokVTBB

IndiaCa lc uttaVECC

PhillipinesManillaRPLL

Sri La nkaColomboVCCC

Sri La nkaColomboVCCC

Sri La nkaColomboVCCCColombo

MaldivesMaleVRMM

IndonesiaBatamWIKB

VanuatuPort VilaNVVV

IndonesiaJakar taWIII

SingaporeWSSS

MauritiusFIMM

Kirribati

NGTT

Samoa

NSFA

Niue IsNIUE

Cook IsRaratongaNCRG

New ZealandChristchurc hNZCH

Iceland/Greenland (B)USASalt Lake CityKSLC

FijiNadiNFFN

ANAU

AustraliaBrisbane

Solomon IsHoniaraAGGG

YBBB

Nth KoreaPyongyangZKKK

IndiaMumbaiVABB

PakistanKarachiOPKC

Nauru

Papeete

Aug 2000

ChinaBeijingZBBB

TokyoJapan

RJAA

Nepa lKathmanduVNKT

Nepa lKathmanduVNKT

<-Y,AG,AN,AY,D,F,G,H,O,R,U,V,W,Z->NZ,NC,NT,NI

<-Y,A,FI ,W->B,C,E,K,L,M,P,S,T

<-WI,WA,WP,WR-> Y,A,B,C,F,K,M,N,P

IndiaDelhiVIDD

<-Y,A,D,F,G,H,NV,O,R,U,V,W,Z->N(ex NZ,NC,NT,NI,NV

Russian FederationMoskva

Russian FederationIrkutskUIII

KwajalenPKMJ

PTYA

ChuukPTOK

PonapeiPTPN

KosraePTSA

UUUU

50bd

2400 X.25

.

2400 X.25

2400 X.25

600 COPB

2400 X.25

2X50 bd

2400 X.25

2400 bd

75bd

300bd

2400 X.25

1200 X.25

75bd

50bd

50bd

2400 X .25

2400 X.25

300 COPB

9600bd

4800 X.25

9600 X .25

9600 X .25

2400bd

1200 bd50bd

1200 bd200bd

Afghanistan (OAKB)

300bd

50bd

2400 X.25

1200bd X.25

50bd

Ulaan BaatarMongolia

ZMUB

1200bd

50bd

50bd

300 COPB

9600 X .25

75bd

300bd

2X75bd

2400bd

50bd2400bd

50bd

200 bd

Tashkent

50bd

Ka bul

50bd

50bd

300bd

300 bd

2400 bd

50 bd

2400 bd

50 bd

300 bd

300 bd

KunmingZPPP

Yangon

Paro

Darussalam

75bd300 bd

Na ha

Apia

Funafuti

Noumea

Pago Pago

Tara waTongatapu

50 bd

MacauVMMC

Musc at Seeb

Dha ka

50 bd RTT

Marshall Is

2400 X.25

9600 X .25

9600 X.25

2X75 bd

200bd

IndonesiaUjungWAAA

Central America(M,T)

1200 X.25

9600 X.25China

9600 X.25300 bd

2400 bd

4800 X.25

2 X 75bd

1200 COPB

50 bd

1200 X.25

1200 X.25

1200 X.25

1200 X .25

1200 X.25Yap

50bd

5

50 bd

PalauKoror PTRO

1200 X.25

75bd2400 X.25

9600bd

Slide 6

Current Regional Circuit SpeedsCurrent Regional Circuit Speeds

50 Baud21%

75 Baud13%

200bps4%

300bps12%

600bps2%

1200bps13%

2400bps21%

4800bps2%

9600bps12%

50 baud to 1200bps = 65%50 baud to 4800bps = 88%

Slide 7

Current Regional ProtocolsCurrent Regional Protocols

None59%

COPB6%

X.2535%

Non ATN Protocols = 65%

Slide 8

Stage 1 - Upgrade of CircuitsStage 1 - Upgrade of Circuits

� ATN at present requires Subnetworks to interface at X.25

� Currently the majority of AFTN circuits (88%) will not be suitable for ATN

� This will require new circuits to be implemented or existing circuits to be upgraded

Slide 9

Stage 1 - Bandwidth IssuesStage 1 - Bandwidth Issues

� Bandwidth for circuits will need to be increased substantially.

� Speeds from 9.6kbps to 64kbps or higher will need to be considered.

� Overheads from each layer of the OSI stack will increase total message size as much as 94% (standard AFTN message size using AMHS)

Slide 10

Site A

AMHS

AIDC

ADS

CPDLC

FIS

Site C

ADS

CPDLC

FIS

Site B

AMHS

AIDC

ATN ApplicationsATN Applications

ATN

Slide 11

Stage 2 - ATN BackboneStage 2 - ATN Backbone

� Selection of Locations based on Existing Inter-Regional Connections and Main Internal Connections

� Diversity for Backbone Connectivity within the Asia/Pacific Region and Neighbouring Regions

� Min of 56kbps to 64kbps for Backbone Trunk Speeds

Slide 12

Inter-Regional Trunk ConnectionNew Inter-Regional Trunk ConnectionIntra-Regional Trunk ConnectionNew Intra-Regional Trunk Connection

NAM Region

EUR Region

MID Region

AFI Region

APAC Region

ATN Regional BackboneATN Regional Backbone

AU

CN JP

IN

TH

SG

HK

Slide 13

Stage 3 - ATN ConnectivityStage 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

Slide 14

Asia/Pacific ATN RoutingAsia/Pacific ATN Routing

AU

CN JP

IN

TH

SG

TO TV WFPF

FJNZ

ID

KR

NR

CK KI NC WS

NP

MO

TW

VUPG SBBD

VN

BNPH

MM

MV

LKBT

KH

LA MY

KP MN

NU

US

MH FM PWAS

ATN Backbone Site

ATN Site

HK

Slide 15

AFTN to AMHS TransitionAFTN 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.

Slide 16

Current AFTN EnvironmentCurrent AFTN Environment

Site C

Site D

Site B

Site A

AFTNSystem

X.25X.25

X.25

Low Speed

Low Speed

AFTNSystem

AFTNSystem

AFTNSystem

Slide 17

Full Implementation of AMHSFull Implementation of AMHS

Site DATNRouter

AMHSSystem

Site CATNRouter

AMHSSystem

Site BATNRouter

AMHSSystem

Site A

AMHSSystem

ATNRouter

ATNDomestic Network

DomesticAMHS

Systems

DomesticAMHS

Terminals

Slide 18

Site BAFTNSystem

Site A

AFTNSystem

Implementation of AFTN/AMHS GatewaysImplementation of AFTN/AMHS Gateways

AMHSGateway

ATNRouter

ATNRouter

AMHSGatewayX.25

Site DAFTNSystem

Site CAFTNSystem

X.25X.25

Low Speed

Low Speed

Slide 19

Site A

AMHSSystem

ATNRouter

AMHSGateway

Domestic Network

DomesticAMHS

Systems

DomesticAMHS

Terminals

Migration to AMHS - 1Migration to AMHS - 1

Site CAFTNSystem

Site DAFTNSystem

X.25X.25

ATNRouter

AMHSGateway

ATN

Site BATNRouter

AMHSSystem

Slide 20

Migration to AMHS - 2Migration to AMHS - 2

Site CATNRouter

AMHSSystem

Site BATNRouter

AMHSSystem

Site A

AMHSSystem

ATNRouter

ATNDomestic Network

DomesticAMHS

Systems

DomesticAMHS

Terminals

Site DAFTNSystem

ATNRouter

AMHSGateway

Slide 21

Full AMHS ImplementationFull AMHS Implementation

Site DATNRouter

AMHSSystem

Site CATNRouter

AMHSSystem

Site BATNRouter

AMHSSystem

Site A

AMHSSystem

ATNRouter

ATNDomestic Network

DomesticAMHS

Systems

DomesticAMHS

Terminals

Slide 22

AIDC ImplementationAIDC 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.

Slide 23

AIDC Over AMHSAIDC Over AMHS

ATN

Site A

AMHSSystem

ATNRouter

Domestic Network

AIDCEnd

System

Site B

ATNRouter

AMHSSystem

Domestic Network

AIDCEnd

System

Slide 24

ConclusionsConclusions

� 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.

� Interim arrangements can be set up between States which have already started their implementation programs.