Cross-layer resource scheduling for video traffic in the downlink of OFDMA-based wireless 4G networks

Authors:
Feroz A. Bokhari;Halim Yanikomeroglu;William K. Wong;Mahmudur Rahman
Affiliations:
Broadband Communications and Wireless Systems Centre, Department of System and Computer Engineering, Carleton University, Ottawa, ON, Canada;Broadband Communications and Wireless Systems Centre, Department of System and Computer Engineering, Carleton University, Ottawa, ON, Canada;Terrestrial Wireless Systems Branch, Communication Research Centre of Canada, Ottawa, ON, Canada;Broadband Communications and Wireless Systems Centre, Department of System and Computer Engineering, Carleton University, Ottawa, ON, Canada
Venue:
EURASIP Journal on Wireless Communications and Networking - Special issue on fairness in radio resource management for wireless networks
Year:
2009

Citing 4
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Abstract

Designing scheduling algorithms at the medium access control (MAC) layer relies on a variety of parameters including quality of service (QoS) requirements, resource allocation mechanisms, and link qualities from the corresponding layers. In this paper, we present an efficient cross-layer scheduling scheme, namely, Adaptive Token Bank Fair Queuing (ATBFQ) algorithm, which is designed for packet scheduling and resource allocation in the downlink of OFDMA-based wireless 4G networks. This algorithm focuses on the mechanisms of efficiency and fairness in multiuser frequency-selective fading environments. We propose an adaptive method for ATBFQ parameter selection which integrates packet scheduling with resource mapping. The performance of the proposed scheme is compared to that of the round-robin (RR) and the score-based (SB) schedulers. It is observed from simulation results that the proposed scheme with adaptive parameter selection provides enhanced performance in terms of queuing delay, packet dropping rate, and cell-edge user performance, while the total sector throughput remains comparable. We further analyze and compare achieved fairness of the schemes in terms of different fairness indices available in literature.