Transition to green cellular network

This paper shows that in every propagation environment, there is a free space propagation medium, due to the existence of Fresnel Zones. This gives rise to Fresnel zone break point d_o, where d_o is the distance between the transmitter and the receiver. Radio frequency propagation within d_o is similar to free space propagation. This enables us to design low power small cells to conserve energy, thereby reducing RF & CO2 pollution. With this foundation in mind, we will develop a hierarchical cellular structure for the next generation green cellular network comprising Macrocell, Microcell, Picocell and Femtocell.