User Attraction via Wireless Charging in Cellular Networks

TL;DR

This paper proposes a novel cellular network architecture where wireless charging encourages users to move closer to small cells, enhancing spectral efficiency and load balancing through optimized charging power.

Contribution

It introduces the concept of spatial attraction in cellular networks and derives an optimal charging power using stochastic geometry for improved network performance.

Findings

Optimized charging power improves spectral efficiency.

User movement towards small cells enhances load balancing.

Closed-form solution for optimal charging power derived.

Abstract

A strong motivation of charging depleted battery can be an enabler for network capacity increase. In this light we propose a spatial attraction cellular network (SAN) consisting of macro cells overlaid with small cell base stations that wirelessly charge user batteries. Such a network makes battery depleting users move toward the vicinity of small cell base stations. With a fine adjustment of charging power, this user spatial attraction (SA) improves in spectral efficiency as well as load balancing. We jointly optimize both enhancements thanks to SA, and derive the corresponding optimal charging power in a closed form by using a stochastic geometric approach.