A basis for 3-D cellular networks

We propose to extend the standard concept of planar cellular networks into space. Indeed, in cellular networks the trend is to have a smaller cells to meet the growing number of communication services. The smaller the cells, the more important is the third dimension because this model is more efficient. So, it is better to take the height into account. For instance, to create a cellular network in a building, it makes no sense to have a planar cellular network. It would be better to have antennas placed in the three dimensions. This paper presents some explanations about the reason why hexagons tessellation are used in the theory of cellular networks. It describes the 3-D cellular networks used for this work and also discusses the frequency reuse mechanism and channel allocation schemes.