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首页> 外文期刊>IEEE Transactions on Communications >Low-Complexity Energy-Efficient Resource Allocation for the Downlink of Cellular Systems
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Low-Complexity Energy-Efficient Resource Allocation for the Downlink of Cellular Systems

机译：蜂窝系统下行链路的低复杂度节能资源分配

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摘要

Energy efficiency (EE) is undoubtedly an important criterion for designing power-limited systems, and yet in a context of global energy saving, its relevance for power-unlimited systems is steadily growing. Equally, resource allocation is a well-known method for improving the performance of cellular systems. In this paper, we propose an EE optimization framework for the downlink of planar cellular systems over frequency-selective channels. Relying on this framework, we design two novel low-complexity resource allocation algorithms for the single-cell and coordinated multi-cell scenarios, which are EE-optimal and EE-suboptimal, respectively. We then utilize our algorithms for comparing the EE performance of the classic non-coordinated, orthogonal and coordinated multi-cell approaches in realistic power and system settings. Our results show that coordination can be a simple and effective method for improving the EE of cellular systems, especially for medium to large cell sizes. Indeed, by using a coordinated rather than a non-coordinated resource allocation approach, the per-sector energy consumption and transmit power can be reduced by up to 15% and more than 90%, respectively.
机译：能源效率（EE）无疑是设计功率受限系统的重要标准，但在全球节能的背景下，其与功率无限系统的相关性正在稳步增长。同样地，资源分配是用于改善蜂窝系统的性能的公知方法。在本文中，我们为频率选择信道上的平面蜂窝系统的下行链路提出了EE优化框架。依靠此框架，我们针对单小区和协作多小区方案设计了两种新颖的低复杂度资源分配算法，分别是EE最佳和EE欠最佳。然后，我们利用算法在现实的电源和系统设置中比较经典的非协调，正交和协调多单元方法的EE性能。我们的研究结果表明，协调可以是一种简单有效的方法，可以改善蜂窝系统的EE，尤其是对于中型或大型小区。实际上，通过使用协调而不是非协调的资源分配方法，每扇区的能耗和发射功率可以分别减少多达15％和90％以上。

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