Femtocells Deployment Scheme: A Framework To Reduce On The Power Consumption In Mobile Cellular Networks

Fueled by the explosive development of ICT and advancement in cellular andInternet technologies, mobile communication networks consume0.5percent of the globalenergy supply alone these days. It is important to lower the power consumption due to thefact that, global warming has been a very serious problem and increased operational costfor network operators. This turns out to be a challenge on energy efficient cellularnetworks to be able to deal with all these that cause urgent demand for more capacity, thus,energy consumption in mobile communication networks continue to rise. In this regard,macro-femto two tier heterogeneous networks where by traffic originating from indoor istransferred from macrocells to femtocells offer a promising means to lower energyconsumption in future mobile networks.Research shows that indoor mobile users account for more than70percent of theoverall mobile traffic. Considering the shorten distance between indoor users and basestations and spatial frequency reuse advantages, as well as the drawbacks on introducedinterference and extra power consumption by femto base stations, an energy efficiencyperformance response of macro-femto two tier heterogeneous network versus macro-onlynetwork is studied in this thesis. We have obtained the system performance and energyconsumption for three different scenarios: the impact of Femtocell penetration rate () onthe system energy efficiency, the impact of different ISD on the user spectral efficiencyperformance as well as ASE and APC dependency, and the impact of indoor user ratio ()on total power consumption. From the simulation performed in scenario I, the areaintegrated throughput is improved from around241Mbps in a macro-only network, toaround16657Mbps in a macro-femto network; this is a69x improvement. This is the samecase for energy efficiency performance which increases from around0.0549in a macro-only network to around2.667in a macro-femto network when all the houses are installedwith FBSs; this is corresponding to around49x improvement. Therefore, macro-femtonetwork technology may be a promising method to save energy consumption in the futuremobile networks and meet the increasing user data rate access requirements...