الفهرس 
Thesis Introduction
Quality of ServiceOnly 14 pages are availabe for public view
 |  | from | 211 |  |  |
| | | from | 211 | | |
Abstract
For several years ago, Broadband access technology has significant influences in the telecommunication industry, and this influence will continue in the future, this is because the growing demand of users, in addition to the significant technological progress which changes moment by moment, which contributed to the development of communication technologies. Worldwide interoperability for microwave access (WiMAX) is a broadband wireless technology which brings broadband experience to a wireless context. There are two different types of broadband wireless services. One is fixed wireless broadband which is similar to the traditional fixed line broadband access technology like DSL or cable modem but using wireless as a medium of transmission. Another type is mobile broadband which has additional functionality of portability, mobility and nomadicity. The IEEE 802.16 family WiMAX is designed to accommodate both fixed and mobile broadband application. WiMAX promises to solve the last mile problem instead of high cost wired deployment. WiMAX also offer higher peak data rates and greater flexibility than other wireless technology such as 3G networks and Wi-Fi.
Multimedia communication over wireless networks takes its position among the most important subject to research and study. That returns to the increased demand of voice and video communication over wireless networks from the users, so studying and analysis the performance of these networks becomes something necessary.
This thesis presents study and analysis of wireless networks (individually WiMAX network) which are used for multimedia communications. A simulation program is used to simulate the work of these networks when they used for multimedia communication, and we use the results of simulation process to evaluate the performance of these networks.
We studied the effect of some parameters such as transmission power, number of subcarriers, base frequency, and QoS...Etc, on the performance of WiMAX network when it used for multimedia applications. The performance was evaluated through some metrics: jitter, mean opinion score, packet end to end delay, signal to noise ratio …Etc.Through this evaluation, the values of the parameters at which they have an ideal network performance have been determined. After that we make compression between WiMAX, Wi-Fi and integrated networks. Also we studied some insights and ideas to enhance the performance of WiMAX network.
This thesis is organized as follows:
Chapter 1: genral introduction about wireless networks.
Chapter 2: provides background of WiMAX technology, including its history, the technical description, and its features and qualifications. Besides that, it presents the standard IEEE 802.16 and its family, its protocol layers and the subject of QoS...Etc.
Chapter 3: provides a brief description of Wi-Fi technology, its features, its difference compare to WiMAX, also presents information about advantages and disadvantages of both technologies.
Chapter 4: provides introduction to multimedia applications including the subjects of voice and video compression, voice and video codecs, and the performance metrics of both. Also presents a brief introduction to VoIP.
Chapter 5: talks about related works.
Chapter 6: this chapter presents introduction about simulation program which is used. It also explains the steps to implement the simulation, and then presents the results and analysis of all implemented scenarios
Chapter 7: presents conclusion and future works.