Adaptive resource allocation strategy of relay OFDMA systems

作者：Zhang, Xin^*; Ye, Wu; Feng, Sui-Li; Zhuang, Hong-Cheng

来源：Journal of South China University of Technology(Natural Science Edition), 2010, 38(9): 7-12.

DOI：10.3969/j.issn.1000-565X.2010.09.002

• Adaptive resource allocations
• Dual decomposition
• Power allocations
• Relay node selections
• Resource allocation algorithms
• Simulated results
• Sub-carrier assignment
• Wireless relay system

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 requirements of each user.

• 出版日期2010-9
• 单位华南理工大学