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TABLE OF CONTENTS
LIST OF TABLES...................................................................................................... vii
LIST OF FIGURES .................................................................................................... vii
CHAPTER 1 ................................................................................................................. 1
INTRODUCTION ........................................................................................................ 1
1.1
Quality of Service ..............................................................................................2
1.2 QoS
Mechanism.................................................................................................4
1.3 Problem
Statement .............................................................................................8
1.4 Contribution .......................................................................................................8
1.5
Organization of the Thesis .................................................................................9
CHAPTER 2 ............................................................................................................... 11
BACKGROUND ........................................................................................................ 11
2.1
WiMAX Network Architecture .......................................................................11
2.2
MAC layer details in IEEE 802.16/WiMAX network.....................................13
2.3 Literature
Survey .............................................................................................20
CHAPTER 3 ............................................................................................................... 23
CASE STUDIES AND SIMULATION ENVIRONMENT ....................................... 23
3.1
Analysis
Strategy .............................................................................................23
3.2 Simulation
Details............................................................................................24
3.3 QoS
Parameters................................................................................................28
3.1.1. Throughput.................................................................................................29
3.1.2. Average Delay or latency...........................................................................30
3.1.3. Jitter or Delay variation .............................................................................30
3.1.4. Packet loss or corruption rate.....................................................................32
vi
CHAPTER 4 ............................................................................................................... 33
SIMULATION RESULTS ......................................................................................... 33
4.1 VOIP
traffic .....................................................................................................33
4.1.1 Results for VOIP traffic over Best Effort Service Flow ............................35
4.1.2 Results for VOIP traffic over Real Time Polling Service Flow ................38
4.1.3 Results for VOIP traffic over Unsolicited Grant Service Flow .................42
4.1.4 Comparative Results for all service flows for VOIP traffic ......................46
4.1.5 Study over various VOIP codecs ...............................................................50
4.2 Video
traffic .....................................................................................................53
4.2.1 Results for video traffic over Best Effort Service Flow ............................54
4.2.2 Results for video traffic over Real Time Polling Service Flow.................58
4.2.3 Results for video traffic over Unsolicited Grant Service Flow..................61
4.2.4 Comparative Results for video traffic........................................................64
CHAPTER 5 ............................................................................................................... 69
CONCLUSION........................................................................................................... 69
5.1 Future
Directions .............................................................................................70
REFERENCES ........................................................................................................... 71
Appendix I .................................................................................................................. 75
Appendix II ................................................................................................................. 80
Appendix III................................................................................................................ 85
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