基于泊松簇过程的三层异构蜂窝网络部署模型

发布时间：2018-03-29 03:38

本文选题：异构蜂窝网络　切入点：泊松簇过程　出处：《工程科学学报》2017年02期

【摘要】：5G标准下的蜂窝网络正在向异构化、超密集化的方向发展,传统的基于六边形网格模型的研究方法较为理想化且并不精确,越来越不适用于如今的异构网络.针对这个问题,目前常用的方法是使用基于随机几何的泊松点过程来研究异构网络的基站部署,这种方法假设基站的空域分布完全随机,因此得到了覆盖概率的理论下界.但是由于宏蜂窝边缘(盲区)以及热点地区(忙区)等特殊区域中,站点的分布可能形成簇,此时,基于泊松点过程的空域分布将不再准确.针对这个问题,本文使用泊松簇过程研究三层异构蜂窝网络的基站部署与规划.首先,提出基于泊松簇过程的基站部署系统模型,讨论了基于簇分布的基站形成过程;其次,在充分分析用户受到的聚集干扰基础上,采用基于瞬时信干噪比的小区选择机制,推导出了中断概率模型,并讨论了三种特殊条件下的中断概率;最后,通过仿真对比分析了基于泊松簇过程与泊松点过程的中断概率的差异以及信干噪比阈值变化时的中断概率的变化曲线,证明了基于簇的空域基站部署具有更低的中断概率.
[Abstract]:The cellular network under 5G standard is developing towards isomerization and hyperdenseness. The traditional research method based on hexagonal mesh model is idealized and imprecise, which is less and less suitable for the heterogeneous networks nowadays. At present, the commonly used method is to use Poisson point process based on random geometry to study the deployment of base stations in heterogeneous networks. This method assumes that the spatial distribution of base stations is completely random. Therefore, the theoretical lower bound of coverage probability is obtained. However, due to the special areas such as macro cellular edge (blind area) and hot spot area (busy area), the distribution of stations may form clusters. The spatial distribution based on Poisson point process will no longer be accurate. In this paper, Poisson cluster process is used to study the base station deployment and planning of three-layer heterogeneous cellular networks. Firstly, a Poisson cluster process based base station deployment system model is proposed. The formation process of base station based on cluster distribution is discussed. Secondly, on the basis of analyzing the aggregation interference of users, the cell selection mechanism based on instantaneous signal-to-noise ratio is adopted, and the outage probability model is derived. Finally, the difference between the interruption probability based on Poisson cluster process and Poisson point process and the curve of interruption probability change with the change of signal-to-noise ratio threshold are analyzed by simulation. It is proved that the cluster-based spatial base station deployment has lower outage probability.
【作者单位】：北京科技大学计算机与通信工程学院;
【基金】：国家自然科学基金资助项目(61572074) 北京市优秀人才培养资助项目(2013D009006000002) 北京市融合网络与泛在业务工程技术研究中心资助项目
【分类号】：TN929.5

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