用户簇分布的异构网络建模与覆盖分析

针对第五代/后五代 (The Fifth generation/Beyond The Fifth Generation ,5G/B5G)移动网络以用户为中心的小基站密集部署问题，构建了一个用户簇分布的三层异构网络模型。该网络模型由宏基站(Macro Base Station, MBS)、微微基站(Pico Base Station, PBS)和毫微微基站(Femto Base Station, FBS)组成。采用随机几何理论对三层异构网络的基站部署进行建模。充分分析了毫微微基站层基于SSA干扰管理的网络干扰统计特性，考虑了有序FBS和无序FBS两种情况，给出了FBS下行链路的覆盖概率。通过仿真，验证了理论结果的正确性，分析了覆盖半径、方差以及宏基站密度对覆盖概率的影响，得出有序FBS方案和无序FBS方案在覆盖概率方面的好坏性取决于系统参数。 

Modeling and Coverage analysis of Heterogeneous Networks Based On User Cluster Distribution

In order to solve the problem of dense deployment of user-centric small base stations in fifth generation/beyond the fifth generation(5G/B5G) networks, a three-layer heterogeneous network model with user cluster distribution was constructed. The network model consists of macro base stations (MBS), pico base stations (PBS) and femto base stations (FBS). Stochastic geometry theory is used to model the deployment of base stations in the three-layer heterogeneous network。Fully analyzed the network interference statistical characteristics of the femto base station layer based on SSA interference management, considered the two cases of ordered FBS and Non-ordered FBS, and gave the coverage probability of FBS downlink. Through simulation, the correctness of the theoretical results is verified, the influence of coverage radius, variance and macro base station density on coverage probability is analyzed, and it is concluded that the ordered FBS and the Non-ordered FBS scheme depend on the system parameters in terms of coverage probability.