Dynamic Fractional Frequency Reuse (DFFR) with AMC and Random Access in WiMAX System

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...

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Bibliographic Details
Published in:Wireless personal communications 2013-02, Vol.68 (4), p.1871-1881
Main Authors: Mohades, Zohreh, Tabataba Vakili, Vahid, Razavizadeh, S. Mohammad, Abbasi-Moghadam, Dariush
Format: Article
Language:English
Subjects:
Access methods and protocols, osi model
Applied sciences
Coding, codes
Communications Engineering
Computer Communication Networks
Computer science
control theory
systems
Computer systems and distributed systems. User interface
Dynamical systems
Dynamics
Engineering
Equipments and installations
Exact sciences and technology
Frequency reuse
Information, signal and communications theory
Interoperability
Mobile radiocommunication systems
Modulation
Networks
Radiocommunications
Random access
Signal and communications theory
Signal,Image and Speech Processing
Software
Subcarriers
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Wireless communication
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Summary: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.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-012-0553-2