Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (9): 7-12.doi: 10.3969/j.issn.1000-565X.2010.09.002

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Adaptive Resource Allocation Strategy of Relay OFDMA Systems

Zhang Xin1  Ye Wu1  Feng Sui-li1  Zhuang Hong-cheng2   

  1. 1.School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.Huawei Technologies Co.,Ltd,Shenzhen 518129,Guangdong,China
  • Received:2009-11-11 Revised:2009-12-27 Online:2010-09-25 Published:2010-09-25
  • Contact: 张昕（1971-），男，博士生，主要从事无线资源管理研究． E-mail:xin．zb@mail．scut．edu．cn
  • About author:张昕（1971-），男，博士生，主要从事无线资源管理研究．
  • Supported by:

    粤港关键领域重点突破项目（20060104-2）

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Abstract:

In this paper,first,the problem of resource allocation of relay OFDMA systems is described as a mathematical model with power-limited access nodes and maximum system capacity,which meets the requirements of miminum rate of each user.Then,a resource allocation algorithm based on dual decomposition is proposed,which decomposes the problem into several subproblems of subcarriers,thus effectively recuding the calculation complexity.By solving the subproblems,optimal schemes of relay node selection,power allocation and subcarrier assignment can be obtained.Simulated results show that the proposed algorithm effectively improves the system capacity and simultaneously meets the rate requiremnets of each user.

Key words: orthogonal frequency division multiplexing, wireless relay system, resource allocation, convex optimization