naa a22 4500 510796354 CHVBK 20180411083338.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11277-012-0553-2 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0553-2 Dynamic Fractional Frequency Reuse (DFFR) with AMC and Random Access in WiMAX System [Elektronische Daten] [Zohreh Mohades, Vahid Tabataba Vakili, S. Razavizadeh, Dariush Abbasi-Moghadam] In this paper; dynamical resource allocation scheme is proposed to improve throughput and fairness in the modern broadband wireless systems such as IEEE 802.16 Worldwide Interoperability for Microwave Access. To assign the subcarriers to users, dynamic fractional frequency reuse is used. In dynamic fractional frequency reuse, each cell is partitioned into two regions, one called super region and another called regular region. Regular region is divided into 3 parts which correspond to the three sectors. In this method, a utility function is firstly used for the subcarrier allocation to the geographical regions and then opportunistic scheduling is applied for the assignment subcarriers to users in each cell. In order to increase the throughput of the system, adaptive modulation and coding techniques are used. Using dynamic fractional frequency reuse reduces fairness among users of a cell. Therefore a random access sub-band is applied to improve the fairness of the system. Springer Science+Business Media, LLC., 2012 Dynamic fractional frequency reuse nationallicence WiMAX nationallicence Inter cell interference nationallicence Adaptive modulation and coding nationallicence Random access nationallicence Mohades Zohreh Department of Telecommunications, School of Electrical Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran aut Tabataba Vakili Vahid Department of Telecommunications, School of Electrical Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran aut Razavizadeh S. Department of Telecommunications, School of Electrical Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran aut Abbasi-Moghadam Dariush Electrical Engineering Department, Shahid Bahonar University, Kerman, Iran aut Wireless Personal Communications Springer US; http://www.springer-ny.com 68/4(2013-02-01), 1871-1881 0929-6212 68:4<1871 2013 68 11277 https://doi.org/10.1007/s11277-012-0553-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0553-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohades Zohreh Department of Telecommunications, School of Electrical Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran aut NATIONALLICENCE 700 1- Tabataba Vakili Vahid Department of Telecommunications, School of Electrical Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran aut NATIONALLICENCE 700 1- Razavizadeh S. Department of Telecommunications, School of Electrical Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran, Iran aut NATIONALLICENCE 700 1- Abbasi-Moghadam Dariush Electrical Engineering Department, Shahid Bahonar University, Kerman, Iran aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 68/4(2013-02-01), 1871-1881 0929-6212 68:4<1871 2013 68 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer