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Front. Inform. Technol. Electron. Eng.  2010, Vol. 11 Issue (6): 450-464    DOI: 10.1631/jzus.C0910405
    
Centralized and distributed resource allocation in OFDM based multi-relay system
Rui Yin1, Yu Zhang1, Guan-ding Yu*,1, Zhao-yang Zhang1, Jie-tao Zhang2
1 Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China 2 Wireless Research Department, Huawei Technologies Co., Ltd., Shenzhen 518129, China
Centralized and distributed resource allocation in OFDM based multi-relay system
Rui Yin1, Yu Zhang1, Guan-ding Yu*,1, Zhao-yang Zhang1, Jie-tao Zhang2
1 Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China 2 Wireless Research Department, Huawei Technologies Co., Ltd., Shenzhen 518129, China
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摘要： In the presence of multiple non-regenerative relays, we derived optimal joint power allocation, relay selection, and subchannel pairing schemes in orthogonal frequency division multiplexing (OFDM) based wireless networks. The Lagrange dual method was employed to design the optimal algorithm. First, the optimization problem was formulated for the single-relay system and the optimal centralized algorithm was presented by resolving the dual problem. Next, the optimal algorithm for a multi-relay system was proposed in a similar way. Compared with the exhaustive search method, the computational complexity of the proposed optimal algorithms was reduced from non-polynomial to polynomial time. Finally, the centralized algorithm was extended to the distributed algorithm, which was more feasible for the practical system. Simulation results verify our analysis.
关键词： Wireless relay network;  Orthogonal frequency division multiplexing (OFDM);  Relay selection;  Convex optimization;  Dual method    
Abstract: In the presence of multiple non-regenerative relays, we derived optimal joint power allocation, relay selection, and subchannel pairing schemes in orthogonal frequency division multiplexing (OFDM) based wireless networks. The Lagrange dual method was employed to design the optimal algorithm. First, the optimization problem was formulated for the single-relay system and the optimal centralized algorithm was presented by resolving the dual problem. Next, the optimal algorithm for a multi-relay system was proposed in a similar way. Compared with the exhaustive search method, the computational complexity of the proposed optimal algorithms was reduced from non-polynomial to polynomial time. Finally, the centralized algorithm was extended to the distributed algorithm, which was more feasible for the practical system. Simulation results verify our analysis.
Key words: Wireless relay network    Orthogonal frequency division multiplexing (OFDM)    Relay selection    Convex optimization    Dual method
收稿日期: 2009-07-05 出版日期: 2010-06-02
CLC:  TN914.51  
基金资助: Project  supported  by  the  National  Natural  Science  Foundation  of  China (No. 60802012), the National Basic Research Program (973) of
China (No. 2009CB320405), the Educational Commission of Zhejiang  Province,  China  (No.  20070234),  and  Huawei  Collaborative
Research Funding (No. YBWL2008046) 
通讯作者: Guan-ding YU     E-mail: yuguanding@zju.edu.cn
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引用本文:

Rui Yin, Yu Zhang, Guan-ding Yu, Zhao-yang Zhang, Jie-tao Zhang. Centralized and distributed resource allocation in OFDM based multi-relay system. Front. Inform. Technol. Electron. Eng., 2010, 11(6): 450-464.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C0910405    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2010/V11/I6/450

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