Hybrid inter-cell interference management for ultra-dense heterogeneous network in 5G

被引：0
作者：
Chen Huang
Qianbin Chen
Lun Tang
机构：
[1] Chongqing University of Posts and Telecommunications,Key Laboratory of Mobile Communication Technology, School of Communication and Information Engineering
来源：
Science China Information Sciences | 2016年 / 59卷
关键词：
interference management; coordinated multi-point transmission; ultra dense network; almost blank subframe; spectrum efficiency;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The Ultra-dense Heterogeneous Network (HetNet), which consists of macro-cells and pico-cells, has been recognized as a key technique to improve network performance. However, the increasing number of pico-cells also causes severe interference including inter-cell interference and intra-cell interference. Therefore, interference management has become an important issue in ultra-dense HetNets, and the traditional enhanced inter-cell interference coordination (eICIC) scheme is no longer fit for the high density of small cells. In this paper, a hybrid interference management method based on dynamic eICIC and coordinated multi-point transmission (CoMP) is proposed. Firstly, a virtual cell is established based on the characteristics of ultra dense HetNets. Then, a novel joint dynamic eICIC scheme combined with multi-user beamforming is deployed to eliminate the inter-cell interference, and improve the throughput of virtual cell significantly without sharp decrease of throughput of macro-cell. Furthermore, a virtual cell based joint transmission scheme is deployed with a power control algorithm, which can obviously increase the spectrum efficiency of virtual cell edge. Simulation results verify that the proposed scheme can achieve better spectrum efficiency both at macro-cell and virtual cell edges, and the network throughput is also improved.
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