Energy Efficiency Analysis in Heterogeneous Networks: A Stochastic Geometry Perspective

Abstract

In this paper, we present the energy efficiency (EE) analysis of a multi-tier cellular network, where intra-and inter-tier dependence in the base station (BS) locations are captured via point processes, i.e., three variants of hard-core point processes (HCPPs) and the Poisson hole process (PHP). The analytical expression for EE is derived by approximating both the average power consumption of BSs and the coverage probability using an approximate signal-to-interference ratio analysis based on the Poisson point process (PPP). It is demonstrated that the proposed Matérn HCPP Type-I-PHP model provides better EE results compared to the other HCPP-PHP and PPP models.INDEX TERMS Area spectral efficiency, energy efficiency, hard-core point processes, heterogeneous networks, Poisson hole process, stochastic geometry.