Table of Contents
International Journal of Vehicular Technology
Volume 2010, Article ID 432762, 10 pages
http://dx.doi.org/10.1155/2010/432762
Research Article

A Novel Fairness-Aware Resource Allocation Scheme in Multiuser SISO-OFDMA Downlink

Wireless Telecommunications Laboratory, Department of Electrical and Computer Engineering, University of Patras, 265 00 Rio, Greece

Received 21 January 2010; Revised 11 May 2010; Accepted 21 June 2010

Academic Editor: Kwan L. Yeung

Copyright © 2010 Vasileios D. Papoutsis et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The problem of resource allocation for the downlink of wireless systems operating over a frequency-selective channel is investigated. It is assumed that both the Base Station (BS) and each user are equipped with a single antenna (Single Input Single Output-SISO case), and Orthogonal Frequency Division Multiple Access (OFDMA) is used as a multiple access scheme. The aim is to maximize the sum of the users' data rates subject to constraints on total available power and proportional fairness among users' data rates. Achieving the optimal solution has a high computational cost thereby the use of suboptimal techniques is necessary. A suboptimal, but efficient, scheme is devised, and it is shown, via simulation, that not only the proposed resource allocation scheme achieve higher sum of the users' data rates than other existing schemes but also the sum data rate is distributed fairly and flexibly among users. In addition, the proposed scheme is complexity effective and can be applied to latest-generation wireless systems that provide Quality-of-Service (QoS) guarantees.