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首页> 外文期刊>Journal of information and computational science >Energy-efficient Resource Allocation Based on Proportional Fairness in OFDM Multi-user Systems
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Energy-efficient Resource Allocation Based on Proportional Fairness in OFDM Multi-user Systems

机译：OFDM多用户系统中基于比例公平的节能资源分配

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摘要

This paper considers the problem of resource assignment with proportional fairness for multi-user OFDM relaying systems in single cell. An energy-efficient strategy is proposed including relay selection, sub-carrier assignment and power allocation subjecting to individual power constraint. The optimal purpose is to maximize the sum of the logarithm per user rate per power. The optimization problem is decomposed into some sub-problems, since the joint optimization problem leads to a mixed-fraction time-complete problem. First, Dinkelbach's method is employed for transforming the fractional programming to integral expression. Then, continuous relaxation is used to solve the dual problem by bisection method and Lagrangian dual decomposition method. Simulation results show that the proposed algorithm has a good trade-off between the throughput and fairness compared with other schemes.
机译：本文考虑了单小区多用户OFDM中继系统中按比例公平分配资源的问题。提出了一种节能策略，该策略包括中继选择，子载波分配和受个别功率约束的功率分配。最佳目的是使每个用户速率和每个功率的对数之和最大化。由于联合优化问题导致混合分数时间完成问题，因此优化问题被分解为一些子问题。首先，采用Dinkelbach方法将分数程序转换为积分表达式。然后，采用连续松弛法通过对分法和拉格朗日对偶分解法求解对偶问题。仿真结果表明，与其他方案相比，该算法在吞吐量和公平性之间具有良好的权衡。

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