Heterogeneous cellular networks (HCNs) play a significant role in 5G networks. but have mainly been modeled and analyzed on a two-dimensional (2D) plane. In this paper. we model a three-dimensional (3D) two-tier HCN consisting of macro-cells and small-cells via a stochastic geometry approach. https://snuzkihr396r.timeblog.net/70682643/investigation-of-the-prestressed-beams-and-glass-window-panels-at-a-shopping-centre