Title :
A Low-Complexity Beamforming-Based Scheduling for Downlink OFDMA/SDMA Systems with Multimedia Traffic
Author :
Chung, Wen-Ching ; Wang, Li-Chun ; Chang, Chung-Ju
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
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.
Keywords :
OFDM modulation; array signal processing; multimedia communication; quality of service; resource allocation; scheduling; space division multiple access; telecommunication traffic; QoS; downlink OFDMA/SDMA systems; low-complexity beamforming-based scheduling; multimedia traffic; resource allocation; semi-orthogonal user selection; Delay; Downlink; Frequency conversion; Multiaccess communication; Multimedia systems; Radio spectrum management; Resource management; System performance; Throughput; Traffic control;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5426219
