Abstract
According to the problem of dense deployment of user-centric small base station in urban environment hotspot areas, this paper constructed a three-tier independent network model based on the combined Poisson cluster process and Poisson hole process. The network model consisted of FBSs, PBSs, MBSs and UEs. In order to restrict the serious transmission interference of intra-tier and inter-tier, we propose a shared spectrum allocation scheme based on user cluster classification. Firstly, we described the classification process of the user cluster in detail; Secondly, the statistical characteristics of UE interference and downlink coverage probability in heterogeneous networks are derived by using random geometry theory; Finally, through simulation experiments, we analyzed the influence of transmission power and PBSs’ coverage radius on coverage probability. The simulation results show that the coverage radius of PBS has a greater influence on the coverage probability.
Published Version
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