A downlink power control heuristic algorithm for LTE networks

Mohamad Yassin, S. Lahoud, M. Ibrahim, K. Khawam
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引用次数: 21

Abstract

The recent development of mobile terminals, the proliferation of mobile applications and the increasing need for mobile data have led to a dense deployment of mobile networks. In this context, the Long Term Evolution (LTE) standard is adopted by a large number of mobile network operators. LTE uses Orthogonal Frequency Division Multiple Access (OFDMA) technique on the downlink of the radio interface along with frequency reuse-1 model. However, Inter-Cell Interference (ICI) and system power consumption will cause limitations in terms of mean user throughput and system performance. Indeed, several recent works focus on the minimization of ICI and power consumption in multi-user OFDMA networks. In this paper, we propose a distributed heuristic power control algorithm that aims at minimizing the total downlink power of an LTE system. We also study the impact of the power control algorithm on ICI and system performance. Simulation results show that the proposed algorithm largely reduces the downlink power consumption without degrading system performance. In addition, it increases the mean throughput for cell-edge users that are mainly affected by ICI problems.
LTE网络下行功率控制启发式算法
近年来移动终端的发展、移动应用的激增以及对移动数据需求的不断增长,导致了移动网络的密集部署。在这种背景下,LTE (Long Term Evolution)标准被大量的移动网络运营商所采用。LTE在无线接口下行链路采用正交频分多址(OFDMA)技术,并采用频率复用-1模型。然而,小区间干扰(ICI)和系统功耗将限制平均用户吞吐量和系统性能。事实上,最近的一些研究集中在最小化多用户OFDMA网络中的ICI和功耗上。在本文中,我们提出了一种分布式启发式功率控制算法,旨在使LTE系统的总下行功率最小。我们还研究了功率控制算法对ICI和系统性能的影响。仿真结果表明,该算法在不影响系统性能的前提下,大大降低了下行链路的功耗。此外,它还增加了主要受ICI问题影响的蜂窝边缘用户的平均吞吐量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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