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Low-complexity energy-efficient resource allocation in OFDMA networks

机译:OFDMA网络中的低复杂度节能资源分配

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摘要

Energy efficiency (EE) is one fundamental performance metric for design of orthogonal frequency division multiple access (OFDMA) networks besides spectral efficiency (SE). The conventional resource allocation is to maximize data throughput without consideration of EE. In this paper, we propose a new low-complexity resource allocation algorithm to maximize EE, which first meet the quality-of-services (QoS) demand of every user and then assign the rest of subcarriers with criterion of energy efficiency. We also compare this new algorithm with the near-optimal EE algorithm, maximum-power-decrease-first (MPDF), which is proposed in [9]. The proposed algorithm differs from the MPDF algorithm in terms of the number of waterfilling for subcarrier allocation. The waterfilling operation in our proposed algorithm is not related to the number of users so that it reduces the computational complexity significantly. Finally, the simulation results show that the proposed algorithm approach the EE performance of the MPDF algorithm with lower complexity.
机译:除频谱效率(SE)之外,能效(EE)是正交频分多址(OFDMA)网络设计的一项基本性能指标。常规资源分配是在不考虑EE的情况下最大化数据吞吐量。在本文中,我们提出了一种新的低复杂度资源分配算法,以最大化EE,该算法首先满足每个用户的服务质量(QoS)要求,然后为其他子载波分配能效准则。我们还将这种新算法与[9]中提出的接近最佳的EE算法,即最大功率降低优先(MPDF)进行比较。所提出的算法与MPDF算法的区别在于子载波分配的注水次数。我们提出的算法中的注水操作与用户数量无关,因此大大降低了计算复杂度。最后,仿真结果表明,该算法以较低的复杂度实现了MPDF算法的EE性能。

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