Multi-Layer Soft Frequency Reuse Scheme for 5G Heterogeneous Cellular Networks

Md.Shahed Hossain, Faisal Tariq, G. A. Safdar, N. Mahmood, Muhammad R. A. Khandaker
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引用次数: 17

Abstract

Heterogeneous network (HetNet) is a promising cell deployment technique where low power access points are deployed overlaid on a macrocell system. It attains high throughput by intelligently reusing spectrum, and brings a trade-off between energy- and spectral-efficiency. An efficient resource allocation strategy is required to significantly improve its throughput in a bid to meet the fifth-generation (5G) high data rate requirements. In this correspondence, a new resource allocation scheme for HetNet, called multi-level soft frequency reuse for HetNet (ML-SFR HetNet), is proposed which increases the throughput several fold. In ML-SFR HetNet, mutually exclusive spectrum is allocated for macro and small cell users and well as for cell edge users among the various cells in the reuse system. We derived spectrum and power allocation expression for a generalized HetNet scenario. In addition, analytical expressions for the throughput and area spectral efficiency (ASE) are also developed. The simulations results demonstrates the efficiency of the proposed scheme which improves the throughput by around 3.5 times and outage probability reduces nearly 5 times compared to traditional SFR system.
5G异构蜂窝网络的多层软频率复用方案
异构网络(HetNet)是一种很有前途的小区部署技术,它将低功耗接入点部署在宏小区系统上。它通过智能复用频谱来实现高吞吐量,并在能量和频谱效率之间进行权衡。为了满足第五代(5G)高数据速率的需求,需要有效的资源分配策略来大幅提高吞吐量。在此通信中,提出了一种新的HetNet资源分配方案,称为HetNet多级软频率复用(ML-SFR HetNet),该方案将吞吐量提高了数倍。在ML-SFR HetNet中,重用系统中的各个小区之间为宏小区用户和小小区用户以及小区边缘用户分配互斥频谱。我们推导了广义HetNet场景下的频谱和功率分配表达式。此外,还建立了通量和面积谱效率(ASE)的解析表达式。仿真结果表明,与传统SFR系统相比,该方案的吞吐量提高了约3.5倍,中断概率降低了近5倍。
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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