Joint Optimization of Pico-Base-Station Density and Transmit Power for an Energy-Efficient Heterogeneous Cellular Network

Abstract

Heterogeneous cellular networks (HCNs) have emerged as the primary solution for explosive data traffic. However, an increase in the number of base stations (BSs) inevitably leads to an increase in energy consumption. Energy efficiency (EE) has become a focal point in HCNs. In this paper, we apply tools from stochastic geometry to investigate and optimize the energy efficiency (EE) for a two-tier HCN. The average achievable transmission rate and the total power consumption of all the BSs in a two-tier HCN is derived, and then the EE is formulated. In order to maximize EE, a one-dimensional optimization algorithm is used to optimize picocell BS density and transmit power. Based on this, an alternating optimization method aimed at maximizing EE is proposed to jointly optimize transmit power and density of picocell BSs. Simulation results validate the accuracy of the theoretical analysis and demonstrate that the proposed joint optimization method can obviously improve EE.

Enhancing Energy Efficiency and Coverage in HetNets through Antenna Optimization

“…The analysis of [32] meticulously scrutinized the impact of BS transmit power on EE, leveraging a Poisson point process (PPP) model, and presenting a formula for determining the optimal transmit power for maximizing EE. Meanwhile, a symbiotic approach towards network EE enhancement was highlighted by [33], advocating for a harmonious adjustment of PBS density and transmit power. Lastly, [34] extensively investigated the domain of two-tier HetNets, shedding light on the energy efficiency (EE) consequences arising from the spatial separation of BSs within the same tier.…”

Energy-Efficient Joint Base Station Switching and Power Allocation for Smart Grid Based Hybrid-Powered CoMP-Enabled HetNet

“…On the other hand, there might be a small number of users who still need to access the services of the BSs; therefore, shutting down any small-cell BS in this scenario is unwise and it may lead to a coverage hole where the affected small-cell users could lose connection to any BS services permanently. Fortunately, HetNet architecture can fill the coverage hole by allowing macro BS (MBS) to serve the affected small-cell users [6].…”