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SATELLITE COMMUNICATIONUSING QUALNET

SUBMITTED BY:MEDHAVI GUPTA(09ITMG1153ECE)KRITI RAWAL (09ITMG1145ECE)MEGHA SHARMA (09ITMG1154ECE)B. Tech (ECE)ITM University

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TABLE OF CONTENTS

Introduction to Qualnet

Satellite model library

Physical and MAC layer model

Protocols and technology used

Software implementation

Analysis

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INTRODUCTION TO QUALNET

QualNet is a comprehensive suite of tools for modeling large

wired and wireless networks.

It uses simulation and emulation to predict the behavior and

performance of networks to improve their design, operation

and management. QualNet enables users to:

Design new protocol models.

Optimize new and existing models.

Design large wired and wireless networks using pre-

configured or user-designed models.

Analyze the performance of networks and perform what-if

analysis to optimize them.

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INTRODUCTION TO QUALNET(CONTD..)

The key features of QualNet that enable creating a

virtual network environment are:

Speed

Scalability Model Fidelity

Portability

Extensibility

o QualNet GUI consists of Architect, Analyzer, PacketTracer, and File Editor.

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SATELLITE MODEL LIBRARY The models described in the Satellite Model

Library are:

Model Name Model Type

ANESAT Model MAC Layer

Satellite-RSV Model PHY Layer

SATTSM-PHY Model PHY Layer

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SATELLITE MODEL LIBRARY(CONTD..)

QualNet Satellite Addon provides a number of features to assist the

system architect analyze the performance of satellite-enabled

networks. These include:

Different beam signatures

Advanced MAC simulation of multiple uplinks per downlink .

Advanced modulation techniques and forward error correctionsimulation.

Adaptive modulation techniques on the forward and reverse

directions of the satellite to adapt to dynamic transmission conditions.

Quality of service and traffic conditioning to ensure fairness to all

users.

Satellite count limited only by available memory.Support for advanced media access and resource allocation

algorithms for packet scheduling.

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PHYSICAL AND MAC LAYER MODEL

There are two physical layer models. They are:

Satellite Technology Support Module Physical Layer (SATTSM-

PHY)

Aloha Satellite Model with RSV Support (Satellite-RSV)

Abstract Network Equation Satellite (ANESAT) Model is the

MAC layer model available

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PROTOCOLSANDTECHNOLOGYUSED Constant Bit Rate is an encoding method where the bitrate

used doesn't fluctuate. CBR is useful for streaming

multimedia content on limited capacity channels.

Variable Bit Rate is an encoding method in which the bit rate

changes continuously during the encoding processdepending on the nature of the audio.

File Transfer Protocol (FTP)

FTP Generic

802.11b technology is a IEEE standard for wireless lan

networks(wifi networks) which uses a 2.4GHz radiofrequency range.

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SOFTWAREIMPLEMENTATION(SCENARIO)

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ANALYSIS

CBR Total bytes sent

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ANALYSIS(CONTD..)

Total bytes received

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ANALYSIS(CONTD..)

CBR Throughput

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ANALYSIS(CONTD..)

VBR :Total bytes sent

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ANALYSIS(CONTD..)

VBR :Total bytes received

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ANALYSIS(CONTD..)

FTP :Total bytes sent

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ANALYSIS(CONTD..)

FTP :Throughput

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ANALYSIS(CONTD..)

FTP Gen :Total bytes sent

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ANALYSIS(CONTD..)

FTP Gen :Total bytes received

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ANALYSIS(CONTD..)

FTP Gen :Throughput

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CONCLUSION Studied communication between two satellites using QualNet

Used 4 protocols- CBR, VBR, FTP, FTP Generic to achieve

the communication

Throughput for the above mentioned protocols increases inthe order: CBR

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