WIMAX QoS Seeker

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In the last free years, there has been important growth in wireless communications. The Quality of Service has become an important consideration that supports many applications that utilize the resources of a network. Some applications are the Voice over IP and the multimedia services such as video streaming. WiMAX network is a new standard network which takes into consideration the quality of service. This project refers to the measurement of network Quality of Service (QoS) parameters of various real time applications like VoIP and video streaming.

Text of WIMAX QoS Seeker

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    Quality of Service Seeker

    By

    Khaled Houssein

    Wisam Salhab

    A report submitted to the Department of Electrical Engineering in partial fulfillment of the

    requirements for the degree of Master of Science in Electrical Engineering

    Faculty of Engineering

    University of Balamand

    February 2013

    Copyright 2013, Khaled Houssein, & Wisam Salhab

    All Rights Reserved

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    University of Balamand

    Faculty of Engineering

    This is to certify that I have examined this copy of Masters report by

    Khaled Houssein

    Wisam Salhab

    And have found that it is complete and satisfactory in all the respects,

    And that any and all revisions required by the final

    Examining committee has been made.

    COMMITTEE MEMBERS:

    Approved:

    Jihad Daba, Ph.D.

    Supervisor

    Approved:

    Rafic Ayoubi, Ph.D.

    First Moderator

    Approved:

    Issam Dagher, Ph.D.

    Second Moderator

    Date of report defense: January 12, 2013

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    ACKNOWLEDGEMENTS

    This report could not have been written if it were not for the contribution and

    encouragement of various people and organizations.

    The authors first wish is to thank the project supervisor, Dr. Jihad Daba for his advice and

    support. Special gratitude goes to project moderators, Dr. Rafic Ayoubi and Dr. Issam Dagher.

    This report would not have been written without the perseverance of the authors, and the

    restless nights spent to finalize the project. Also, the encouragement and devotion of family and

    friends should be mentioned who have helped a great deed.

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    ABSTRACT

    In the last free years, there has been important growth in wireless communications. The

    Quality of Service has become an important consideration that supports many applications that

    utilize the resources of a network. Some applications are the Voice over IP and the multimedia

    services such as video streaming. WiMAX network is a new standard network which takes into

    consideration the quality of service. This project refers to the measurement of network Quality of

    Service (QoS) parameters of various real time applications like VoIP and video streaming.

    The first phase of this project is the QoS parameter measurements. In this phase, a set of

    QoS parameters are defined. These parameters are delay, delay variation (jitter) and packet loss

    probability . They are used in the development of program. Then the QoS Seeker application

    developed in this project is presented, including its principle . The following contents give a

    collection and analysis of results of the measurements of QoS parameters using the QoS Seeker

    program.

    The second phase is the video streaming and VoIP call simulation. In this part, elements

    of general video and VoIP applications are introduced. The parameters that specify the quality

    of service of the network , such as, throughput, packet loss, jitter and latency , are analyzed for

    different times of services

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    Table of Contents

    TABLE OF CONTENTS ............................................................................................................................................ 5

    CHAPTER 1 .............................................................................................................................................................. 12

    OVERVIEW OVER WIMAX .................................................................................................................................. 12

    1.1. INTRODUCTION .............................................................................................................. 12

    1.2. FIXED WIMAX (IEEE802.16D) .................................................................................... 13

    1.3. MOBILE WIMAX (IEEE802.16E) ................................................................................ 14

    1.4. ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) ................................ 15

    1.5. ORTHOGONAL FREQUENCY-DIVISION MULTIPLE ACCESS (OFDMA) ....................... 17

    1.6. WIMAX ARCHITECTURE .............................................................................................. 17

    1.6.1. WiMAX Architecture Parts ................................................................................................................ 18

    1.6.2. WiMAX Protocol ............................................................................................................................... 20

    1.7. PHYSICAL LAYER OF WIMAX ...................................................................................... 21

    1.7.1. Modulation Schemes .......................................................................................................................... 22

    1.7.2. WiMAX Transmitters ......................................................................................................................... 22

    1.7.3. Frequency Division Duplexing (FDD) .............................................................................................. 23

    1.7.4. Time Division Duplexing (TDD) ....................................................................................................... 24

    1.8. MAC LAYER IN WIMAX ............................................................................................... 24

    1.9. WIMAX PHY FRAME ................................................................................................... 25

    1.9.1. Downlink Sub frame .......................................................................................................................... 26

    1.9.2. Uplink Sub frame ............................................................................................................................... 26

    2. WIMAX VERSUS WI-FI .................................................................................................... 27

    CHAPTER 2 .............................................................................................................................................................. 28

    QUALITY OF SERVICE IN WIMAX NETWORKS ........................................................................................... 28

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    2.1. QOS DEFINITION ........................................................................................................... 28

    2.2. QOS PARAMETERS ......................................................................................................... 28

    2.2.1. Bandwidth .......................................................................................................................................... 28

    2.2.2. Latency .............................................................................................................................................. 29

    2.2.3. Jitter or PDV ..................................................................................................................................... 29

    2.2.4. Packet Loss ........................................................................................................................................ 29

    2.3. APPLICATIONS FOR QUALITY OF SERVICE ................................................................... 30

    2.4. WIMAX QOS CLASSES ................................................................................................. 30

    CHAPTER 3 .............................................................................................................................................................. 32

    VOIP / MULTIMEDIA OVER WIMAX ................................................................................................................ 32

    3.1. VOICE OVER INTERNET PROTOCOL (VOIP) .................................................................... 32

    3.1.1. Definition ................................................................................................................................................ 32

    3.1.2. VoIP Network Connections ..................................................................................................................... 32

    3.1.3. Real Time Protocol ................................................................................................................................ 34

    3.1.4. Codec ...................................................................................................................................................... 35

    A. G.729 Codec ............................................................................................................................................................... 35

    B. G.711 Codec ............................................................................................................................................................... 35

    3.1.5. VoIP QoS ............................................................................................................................................... 36

    Measurements .................................................................................................................................................................. 36

    3.2. IP MEDIA SUBSYSTEM SERVICES - IMS ......................................................................... 37

    3.2.1. Video Streaming ...................................................................................................................................... 37

    3.2.2. IPTV ...

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