DocumentCode :
3339355
Title :
A Region-Based Downlink Scheduling Algorithm in MIMO Precoding Systems
Author :
Pang, Di ; Hu, Jinlong ; Yang, Yubo ; Tian, Lin ; Zhou, Jihua ; Shi, Jinglin
Author_Institution :
Inst. of Comput. Technol., Chinese Acad. of Sci., Beijing
fYear :
2009
fDate :
5-8 April 2009
Firstpage :
1
Lastpage :
6
Abstract :
Although significant throughput gains and system fairness can be obtained by slot-based scheduling algorithms, the corresponding complexities are considerable. In this paper, we propose a region-based downlink scheduling algorithm for QoS-guaranteed services in multi-user multiple-input multiple-output (MIMO) precoding systems. In contrast with conventional slot- based scheduling, region-based scheduling allocates bandwidth based on resource regions consisting of several slots. The proposed algorithm combines QoS-urgent-degree and the proportional fairness to select candidate connections, and determines the size of each SDMA region. In addition, multi-user scheduling is performed in all SDMA regions to completely exploit spatial multiplexing gains. Simulation results show that, at the cost of slightly lower spectrum efficiency and data rate guarantee, the proposed region-based scheduling algorithm has much lower complexity, while at the same time it can achieve higher performances in system fairness and delay guarantee.
Keywords :
MIMO communication; bandwidth allocation; communication complexity; multiplexing; precoding; quality of service; scheduling; MIMO precoding systems; QoS-guaranteed services; QoS-urgent-degree; SDMA region; bandwidth allocation; multi-user multiple-input multiple-output precoding systems; region-based downlink scheduling algorithm; region-based scheduling; slot- based scheduling; spatial multiplexing gains; Bandwidth; Costs; Delay systems; Downlink; MIMO; Multiaccess communication; Performance gain; Resource management; Scheduling algorithm; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE
Conference_Location :
Budapest
ISSN :
1525-3511
Print_ISBN :
978-1-4244-2947-9
Electronic_ISBN :
1525-3511
Type :
conf
DOI :
10.1109/WCNC.2009.4917540
Filename :
4917540
Link To Document :
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