Resource allocation with proportional rate fairness in orthogonal frequency division multiple access relay networks

被引:4
作者
Shen, Yanyan [1 ]
Feng, Gang [1 ]
Yang, Bo [2 ,3 ]
Guan, Xinping [2 ,3 ]
机构
[1] City Univ Hong Kong, Dept Mech & Biomed Engn, Hong Kong, Hong Kong, Peoples R China
[2] Shanghai Jiao Tong Univ, Dept Automat, Shanghai 200240, Peoples R China
[3] Shanghai Jiao Tong Univ, Minist Educ, Key Lab Syst Control & Informat Proc, Shanghai 200240, Peoples R China
关键词
resource allocation; OFDMA; relay networks; proportional rate fairness; WIRELESS; OPTIMIZATION; SCHEMES;
D O I
10.1002/wcm.2184
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
We address the problem of subchannel and transmission power allocation in orthogonal frequency division multiple access relay networks with an aim to maximize the sum rate and maintain proportional rate fairness among users. Because the formulated problem is a mixed-integer nonlinear optimization problem with an extremely high computational complexity, we propose a low-complexity suboptimal algorithm, which is a two-step separated subchannel and power allocation algorithm. In the first step, subchannels are allocated to each user, whereas in the second step, the optimal power allocation is carried out on the basis of the given subchannel allocation and the nonlinear interval Gauss-Seidel method. Simulation results have demonstrated that the proposed algorithm can achieve a good trade-off between the efficiency and the fairness compared with two other existing relevant algorithms. In particular, the proposed algorithm can always achieve 100% fairness under various conditions. Copyright (c) 2012 John Wiley & Sons, Ltd.
引用
收藏
页码:269 / 283
页数:15
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