01473nas a2200157   4500000000100000008004100001260001500042100001900057700001700076700002400093700002000117700001900137245006400156490000800220520108700228       2024                            d  c10/07/20241 aGodlove Kuaban1 aErol Gelenbe1 aTadeusz Czachórski1 aPiotr Czekalski1 aValery Nkemeni00aEnergy Performance of Off-Grid Green Cellular Base Stations0 v1653 a<pre>
The most energy-hungry parts of mobile networks are the base station sites, which consume around $60-80\%$ of their total energy. One of the approaches for relieving this energy pressure on the electricity grid infrastructure and reducing the Operational Expenditures (OPEX) is to power base stations with renewable energy. However, the design of a green mobile network requires the dimensioning of the energy harvesting and storage systems through the estimation of the network's energy demand. Therefore, this paper develops a diffusion-based modelling framework for solar-powered green off-grid base station sites. We apply this framework to evaluate the energy performance of homogeneous and hybrid energy storage systems supplied by harvested solar energy. We present the complete analysis, with numerical examples, to study the relationship between the design parameters and the energy performance metrics. The numerical computations demonstrate how the proposed framework can be applied to evaluate homogeneous and unconventional hybrid energy storage systems.</pre>