Title: Efficient resource allocation in OFDMA cellular wireless networks to support multimedia traffic in downlink

Authors: Dhananjay Kumar, S. Srividhya, P. Mariappan, M. Martheeswaran, C. Chellappan

Addresses: Department of Information Technology, Anna University, MIT Campus, Chennai-44, India. ' Department of Information Technology, Anna University, MIT Campus, Chennai-44, India. ' Department of Information Technology, Anna University, MIT Campus, Chennai-44, India. ' Department of Information Technology, Anna University, MIT Campus, Chennai-44, India. ' Department of Computer Science and Engineering, Anna University, Main Campus, Chennai-25, India

Abstract: Orthogonal frequency division multiple access (OFDMA) is a promising technique for achieving high capacities in future cellular systems to support multimedia traffic. The OFDMA technique not only allows maximum resource utilisation, but also a very flexible channel management. In order to meet the dynamic bandwidth requirement in downlink, an efficient resource allocation method called two stage rate adaptive (TSRA) algorithm is proposed here. The TSRA meets the quality of service (QoS) requirements of the real time services on the expense of non real time traffic while maximising the dynamic capacity of the OFDMA system. We find that for the higher traffic load, the average capacity of the system approaches the theoretical/analytical limit. The delay and bit error rate (BER) of TSRA observed here can support varieties of multimedia services.

Keywords: carrier to interference ratio; CINR; bit error rate; BER; capacity; throughput; delay; resource allocation; orthogonal frequency division multiple access; OFDMA; cellular wireless networks; multimedia services; downlink; dynamic bandwidth requirements; quality of service; QoS.

DOI: 10.1504/IJMNDI.2009.030839

International Journal of Mobile Network Design and Innovation, 2009 Vol.3 No.2, pp.72 - 81

Published online: 09 Jan 2010 *

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