Power Consumption Modeling for CoMP Overlaid Neighborhood Femtocell Networks

Power consumption analysis is the first step in the process of dimensioning the cell size for any mobile network. Therefore, improving power utilization emerges as one of the major challenges to the 3rd Generation Partnership Project (3GPP) Long-Term Evolution (LTE) Release 12 coordinated multipoint (CoMP) transmission and reception scheme. This paper proposes new models for heterogeneous deployment of CoMP macrocells overlaid with the emerging neighborhood femtocell network in order to meet the power efficiency requirements. Two case studies are mathematically analyzed: Firstly, neighborhood femtocells are allocated at the macrocell edge line in order to reduce the ultimate range of CoMP transmission while coverage is extended using low power femtocell transmissions. Secondly, femtocells are deployed at selected CoMP intra-cell regions in order to improve neighborhood coverage; transmissions are coupled between femtocells and CoMP to provide the necessary converge across the cell area and transfer connections from macrocell to low power femtocells. A comparative study is performed to show the power efficiency obtained through scaling the network area at both cell-edge and sub-cell areas. The analysis show new strategies for deploying small cells under CoMP macrocell umbrella in order to minimize the power consumption figures compared to only macrocell based network.