Deployment Optimization of Small Cell Networks With Sleep Mode

Abstract

Demand for mobile data services is increasing exponentially and operators have responded by expanding and upgrading their networks to enhance capacity. One promising technique is to densify the network with low-power and small-coverage base stations (BSs) to provide significant capacity gains. In this paper, we develop a multi-user connectivity model for a Poisson Point Process (PPP)-based homogeneous network to facilitate a realistic study of its energy performance subject to blocking constraints. We then derive the average rate per channel and per user and compute the average sum rate of the network. An area power consumption (APC)-minimization framework is then formulated subject to appropriate coverage and average rate constraints to determine the optimal deployment configuration of BS density and associated transmit power. Furthermore, a new sleep mode mechanism called centralized strategic scheme is analyzed to determine its ability to adapt energy consumption to variable user density. Our results show that sleep mode is a viable solution for managing network energy consumption in dense networks.