A low-complexity beamforming-based scheduling for downlink OFDMA/SDMA systems with multimedia traffic

Authors:
Wen-Ching Chung;Li-Chun Wang;Chung-Ju Chang
Affiliations:
Department of Communication Engineering, National Chiao Tung University, Hsinchu, Taiwan, R.O.C.;Department of Communication Engineering, National Chiao Tung University, Hsinchu, Taiwan, R.O.C.;Department of Communication Engineering, National Chiao Tung University, Hsinchu, Taiwan, R.O.C.
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 3
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Adaptive radio resource allocation for downlink OFDMA/SDMA systems with multimedia traffic

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On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming

IEEE Journal on Selected Areas in Communications

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Abstract

The purpose of this paper is to reduce the complexity of scheduling scheme for OFDMA/SDMA system with multimedia traffic. To achieve this purpose, we propose a low-complexity beamforming-based scheduling (LCBS) scheme to solve the multi-dimensional (space, time, and frequency) radio resource allocation problem in OFDMA/SDMA systems. By utilizing a semi-orthogonal user selection (SUS) algorithm, the LCBS scheme has a good trade-off between the implementation complexity and system performance in throughput, QoS guarantee (for all traffics), and fairness guarantee (for non-real-time and best effort traffics). Simulation results show that the LCBS scheme can efficiently improve the fairness performance compared to most existing algorithms.