Mohammed Khalid Salman Fadhil - Mobile WiMAX systems : performance analysis of fractional frequency reuse

Mobile WiMAX Systems

Performance Analysis of Fractional Frequency Reuse

Mobile WiMAX Systems

Performance Analysis of Fractional Frequency Reuse

M. K. Salman Alnaimi

Abid Yahya

With contributions from

R. Badlishah Ahmad

CRC Press

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Library of Congress Cataloging-in-Publication Data

Names: Fadhil, Mohammed Khalid Salman, author. | Yahya, Abid, author.
Title: Mobile WiMAX systems : performance analysis of fractional frequency reuse / Mohammed Khalid Salman Fadhil, Abid Yahya.
Description: Boca Raton, FL : CRC Press/Taylor & Francis Group, 2019. | A CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa plc. | Includes bibliographical references and index.
Identifiers: LCCN 2018014272| ISBN 9780815348023 (hardback : acid-free paper) | ISBN 9781351026628 (ebook)
Subjects: LCSH: Orthogonal frequency division multiplexing. | IEEE 802.16 (Standard) | Mobile communication systems. | Radio resource management (Wireless communications)
Classification: LCC TK5103.484 .F33 2019 | DDC 621.3845/6--dc23
LC record available at

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This book is gratefully dedicated to my children, my wonderful wife,

and my mother and father, who taught me how to be a man.

M. K. Salman Alnaimi

Dedicated to my family for their love, support, and sacrifice along the path

of my academic pursuits, especially to my father, who took me to school.

Abid Yahya

Contents

Broadband wireless connections have emerged as a solution to satisfy users demands for modern E-applications, such as Long Term Evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMAX). According to Ericssons official projection, global mobile broadband subscriptions will reach 6.5 billion by the end of 2018. This orientation of the public toward wireless broadband Internet services needs more attention in terms of adequate resources and bandwidth to meet users demands for modern E-services. The world is rapidly moving toward the use of mobile phone applications, and global telecom companies are competing to provide the best services to users. Optimal use of the bandwidth package and available radio resources is the goal of these companies, as they are always working to improve them to match users requirements. Radio resources are valuable; there is a need for more adaptive and reconfigurable solutions for better exploiting resources in the network, especially when we are talking about the wireless network, since the control signal occupies a significant portion of the bandwidth.

Most of the problems that hinder the best use of radio resources in the cellular network lie in the frequency interference between mobile phone base stations, which results in reduced cell capacity and limits the service quality of cell edge users. Many methods have been proposed to overcome the intercell interference problem. Fractional frequency reuse (FFR) is one of the methods used by WiMAX and LTE technology. FFR is not restricted to WiMAX; it can be used by any mobile technology to address the problem of intercell interference, which is a matter of controlling frequency and time.

An IEEE 802.16e WiMAX base station uses FFR to enhance the capacity and signal quality of cell edge users. Even though FFR is important to use in cellular systems, it has some drawbacks. For this reason, the first chapter of the book explains the principle of intercell interference, the FFR technique, and the problem associated with current FFR. Then Chapter 2 describes the types of FFR, FFR resource assignment challenges in the orthogonal frequency-division multiple access (OFDMA) network, and how to enhance the utilization of radio resources in FFR.

The WiMAX physical layer theory has become an important part of wireless network research, because most of the wireless protocols function there. The most important fetchers of the WiMAX physical layer are related to designing the FFR technique and are presented in Chapter 3, which is very important for understanding, modifying, or enhancing the FFR technique.

Modern mobile communications technology can use two types of frame configuration to match cell load: static and dynamic. In the static configuration, the frame information is changed every several hours or possibly every several days. On the contrary, in the dynamic configuration the frame information is changed frame by frame to match the cell load. Chapter 4 presents the design and implantation of two new FFR algorithms: static resource assignment (SRA) and dynamic resource assignment (DRA). Comprehensive mathematical models are discussed that are not included or clearly explained in other books on WiMAX. Readers can take advantage of these mathematical models in designing, developing, or even applying them to other wireless network systems for different purposes. For future development, this chapter also covers topics like how to effectively model the channel capacity of a cellular network, and the cellular network of 19 base stations.

The results of the proposed algorithms are demonstrated in Chapter 5. In fact, these results represent the outputs of the mathematical models. The chapter shows the effort of the new FFR algorithms in the cellular network of 19 base stations. Also, these algorithms are tested by applying three types of WiMAX system parameters, such as 5, 10, and 20 MHz system bandwidth.

We thank the following individuals; without their contributions and support, this book could not have been written.

We would like to express their special gratitude and thanks to the Ministry of Higher Education and Scientific Research and Science and Technology, Iraq; Botswana International University of Science and Technology (BIUST); and Universiti Malaysia Perlis (UniMAP), Sarhad University of Science and Information Technology (SUIT), Peshawar, for giving us the attention, time, and opportunity to publish this book.