Trng i hc Bch Khoa H Ni

Hanoi University of Science and Technology

HUST 2013

Mng Thng tin Hng Khng

TS. Trng Tun

B mn in t Hng khng-V tr

Department of Aerospace Electronics

Trng i hc Bch Khoa H Ni

Hanoi University of Science and Technology

Mng Vin thng Hng khng - ATN

HUST 2013

Mng Thng tin Hng Khng

Department of Aerospace Electronics

Teminologies

3

ATN: Aeronautical Telecommunications Network

AFTN: Aeronautical Fix Telecommunications Network

AMHS: Air Traffic Service Message Handling System

ATN Overview

4

- A new telecommunication system standard for aviation.

- Performs the communication aspect in CNS/ATM and

manages

+ Ground-to-Ground (between aircraft and air traffic

controller) communication

+ Air-to-Ground (between air traffic controllers)

communication

- Provides data communication services for aeronautical

purpose, e.g. ATS (Air Traffic Services).

- Capable of bridging multiple ground systems

ATN Overview

5

ATN - Concept

6

ATN is an internetwork architecture that allows

ground, air-ground and avionic data sub-networks to

interoperate by adopting common interface services

and protocols based on the ISO OSI reference model.

ATN - Applications

7

Air-to-Ground

CM (Context Management)

ADS (Automatic Dependence Surveillance)

ADSB (Automatic Dependence Surveillance Broadcast)

CPDLC (Controller Pilot Data Link Communication)

FIS (Flight Information Service)

Ground-to-Ground

AMHS (ATS Message Handling Service)

AIDC (ATS Interfacility Data Communication)

ATN Building Components

8

ATN Communication Model

9

ATN Model in Connection with OSI Model

10

COSP (Connection Oriented Service Protocol)

COTP (Connection Oriented Transport Protocol) CLNP (Connectionless Network Protocol)

CLTP (Connectionless Transport Protocol)

ATN - Protocol

11

ATN Inside CNS/ATM

12

CSP

Air/Ground ATN router

Ground ATN router

Air/Ground ATN router

Air/Ground ATN router

X.25 X.25

Mode S

VDL-2

AMSS

ATC

operation

s

Ground ATN router

ATC

operations

Ground ATN router

CSP

CSP

Airline

operations ATN equipped Airborne

Airline operations

X.25

IP

ATN End

System & Users

ATN End System & Users

ATN equipped Airborne

AFTN

13

AFTN :

Aeronautical Fixed Telecommunication Network

Use voice transmission

When an airplane needs to communicate to the ground during the flight, the pilot contacts the ATC

(Air Traffic Controller) via the communication radio

(VHF) verbally. If the message needs to be delivered to

a remote airport, an operator rewrites the message in

a form of NOTAM format and transmits it through the

AFTN routers.

Problem: Voice Interference and Dialect

NOTAM: NOtice To AirMan

AFTN - Network

14

AFTN TerminalsAFTN NetworkAFTN Terminals

AFTN

Switch

Forward

StoreStore

Forward

Store

Forward

Store

Forward

AFTN

Switch

AFTN - Protocol

15

X.25Network

InfrastructureNetwork

Infrastructure

AFTN Messaging

(Annex 10)

Local

Interface

AFTN

Terminal

AFTN

Terminal

AFTN

SwitchAFTN

Switch

Forward ForwardStore Store

Local

Interface

AFTN - Message

16

AFTN messaging is a low-voltage teletype used for

communicating air traffic flight plans and other aircraft

operational and weather messages such a NOTAMs, TAFs,

and METARs

AFTN Weaknesses

17

1. Not user friendly, using NOTAM format

2. Not secure enough

3. Low throughput and slow

4. Only support ground to ground communication

(G to G communication)

5. Air to Ground communication uses voice

communication (Very High Frequency Radio)

6. VHF Radio does not cover all regions in FIRs

ATC system element architecture

18

AFTN

ATN

Air/ground open system communication architecture assessment, p.33

DADI-2/WP2/DERA/028/D22/PU/1.0

Introduction

19

Existing digital aeronautical data links (A) and satellite links (S)

Introduction

20

Satellite system for aeronautical communications architecture as considered in

(ICAO, 2010)

AES (aircraft on board terminal)

GES (Earth terminal)

transparent

an IP router

Trng i hc Bch Khoa H Ni

Hanoi University of Science and Technology