Interference coordination in full-duplex HetNet with large-scale antenna arrays

Interference coordination in full-duplex HetNet with large-scale antenna arrays
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大规模天线阵列全双工 HetNet 中的干扰协调

DOI:
10.1631/fitee.1700047
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发表时间:
2017-05
影响因子:
3
通讯作者:
Lyu Wei
Lyu Wei
中科院分区:
工程技术3区
文献类型:
--
作者:
Zhang Zhao-yang;Lyu Wei

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大规模多输入多输出(MIMO)、小小区和全双工是未来5G通信系统的最有前途的技术,其中干扰已经成为最具挑战性的问题。本文提出了一种两层异构网(HetNet)的干扰协调框架,该网络由一个支持大规模MIMO的宏蜂窝基站(MBS)和多个全双工小蜂窝基站(SBSS)组成。为了抑制干扰并最大化吞吐量,应仔细选择无线回程链路(即,带内或带外)上的每个SBS的全双工模式,其对干扰图案具有不同的影响。为了解决这个问题,我们提出了两种集中式算法,一种是遗传算法(GEA),另一种是贪婪算法(GRA)。为了充分降低MBS的计算开销,提出了一种基于代价的分布式图着色算法(DGCA)。数值结果表明,所提出的算法显著提高了系统吞吐量。
Massive multiple-input multiple-output (MIMO), small cell, and full-duplex are promising techniques for future 5G communication systems, where interference has become the most challenging issue to be addressed. In this paper, we provide an interference coordination framework for a two-tier heterogeneous network (HetNet) that consists of a massive-MIMO enabled macro-cell base station (MBS) and a number of full-duplex small-cell base stations (SBSs). To suppress the interferences and maximize the throughput, the full-duplex mode of each SBS at the wireless backhaul link (i.e., in-band or out-of-band), which has a different impact on the interference pattern, should be carefully selected. To address this problem, we propose two centralized algorithms, a genetic algorithm (GEA) and a greedy algorithm (GRA). To sufficiently reduce the computational overhead of the MBS, a distributed graph coloring algorithm (DGCA) based on price is further proposed. Numerical results demonstrate that the proposed algorithms significantly improve the system throughput.
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