Tài liệu Chương 2 Phân mạng vệ tinh di động hàng không AMSS doc

Trường Đại học Bách Khoa Hà Nội Hanoi University of Science and Technology... Trường Đại học Bách Khoa Hà Nội Hanoi University of Science and Technology Phân mạng vệ tinh di động hàng k

Trường Đại học Bách Khoa Hà Nội

Hanoi University of Science and Technology

2

Trường Đại học Bách Khoa Hà Nội

Hanoi University of Science and Technology

Phân mạng vệ tinh di động hàng không AMSS

Chương 2

© HUST 2012

Hệ thống Thông tin Hàng Không

Teminologies

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AMSS: Aeronautical Mobile Satellite Subsystem

AMS(R)S : Aeronautical Mobile-Satellite (Route) Service

BGAN : B roadband G lobal A rea Network

Overview of ATN architecture

Introduction

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Satellite system for aeronautical communications architecture as considered in (ICAO, 2010)

AES (aircraft on board terminal)

GES (Earth terminal)

“ transparent ”

an IP router

AMS(R)S

connectivity to users such as air traffic controllers , pilots and aircraft operators

earth stations ( AES s), ground earth stations

a network coordination center

aeronautical communications

 Iridium

AMS(R)S

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Frequency bands allocated by the ITU

The L band is defined as the Mobile Satellite Service allocation in the frequency ranges 1525-1559 MHz and

1626.5-1660.5 MHz

AMS(R)S

The principle of transmission in the safety satellite system

 The mobile link, between the satellite and the aircraft, is built

on a safety satellite spectrum allocation, based on AMS(R)S standard;

AMS(R)S

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The principle of transmission in the safety satellite system

 The satellite is in charge of signals frequency conversion, simultaneously from C or Ku band to L band for the forward

link, and from L band to C or Ku band for the return link;

AMS(R)S

The principle of transmission in the safety satellite system

 The fixed link, between the ground and the satellite, is built

on a fixed satellite spectrum allocation, based on FSS standard

AES

GES

Data/PSTN

AMS(R)S

Geostationary Satellite Systems

 Civil aviation mainly uses satellite services from geostationary satellites

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Low-Earth Orbit Satellite Systems

 Operate between 600 and 2000 km above the earth’s surface

 Round trip delay of between 4 and 70 ms

LEO constallation (16 satellites for round the world coverage)

Medium-Earth Orbit Satellite System

 Operate between 3000 and 30 000 km above the earth’s

surface

 Round trip delay of typically between 20 and 250 ms

 No service providers are known to provide a general service

to the aeronautical civil application

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Inmarsat

Inmarsat mobile system components

* Round trip propagation delay of between 240 and 280 ms

Inmarsat

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illustrate postion of Inmarsat Satellites on the map?

Inmarsat Satellite and Ground Stations

E.g Goonhilly in the UK, Eik in Norway and Aussaguel in France – all acting as ground station (or hubbing points) for the Inmarsat aero service

to the Inmarsat 3-F2 satellite at 15.5◦ west

Inmarsat

Indian Ocean XANTIC Australia Telenor Norway Singapore Telecom KDDI Japan

Pacific Ocean XANTIC Australia Telenor USA Singapore Telecom KDDI Japan

AMS(R)S

Inmarsat satellite services have multiple allocations in L band (mainly around 1.4 GHz) for the mobile portion, C Band (3.4–4.8 GHz), Ku (10.7– 12.75 GHz) and Ka (19–22 GHz) bands mainly for the fixed portion

Examples

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Ex1 Link Budget Calculation

Satellite Theory

Satellite theory block diagram

Link Budget Equation

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miles/km=1,609

Link Budget Equation

miles/km=1,852

C/No = ?

Link Budget Equation

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miles/km=1,852

C/No = ?

Examples

Ex2

Examples

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Trường Đại học Bách Khoa Hà Nội

Hanoi University of Science and Technology