Modeling And Analysis Of Downlink Heterogeneous Cellular Network With Dual-slope Path Loss Model

Nowadays,the traditional cellular networks are developing to be heterogeneous and complicated,which results in the exploration of heterogeneous cellular networks being a hot research topic.In order to give more insight into the research,stochastic geometry has been widely adopted to the modeling and analysis of heterogeneous cellular networks over the past decade.Until now,researchers have carried out several system models for heterogeneous cellular networks.As the basic objects of stochastic geometry,point processes played an important role in these models.At present,more and more new point process have been successfully applied to heterogeneous cellular networks.In the theories of modeling heterogeneous cellular networks with point processes,the standard path loss model was widely used as system path loss model.However,in a recent study,the standard pass loss model was demonstrated to be imprecise compared with the path loss in the real communication environment.And then,researchers put forward a dual-slope path loss model as better substitute.In order to achieve more accurate theoretical results,in this paper,we firstly modeled the downlink heterogeneous cellular networks with dual-slope path loss model and homogeneous Poisson point process.Then,based on the new path loss model and interference model,we derived the expressions of coverage probability and the average ergodic rate of the system model.Finally,we verified the theoretical results by simulation,and analyzed how the SINR threshold and the density of base station influence the system performance.This paper theoretically studied the heterogeneous cellular networks with dual-slope path loss model for the first time.So the work of this paper will provide important reference to henceforth research.