A Survey on Spectral and Energy Efficient Next-Generation Wireless Networks

Abstract

The exponential increase in mobile data traffic and ever-increasing mobile users has led to a swift rise in the energy consumption and operational costs of wireless networks. Spectral Efficiency (SE) and Energy Efficiency (EE) are considered to be the most important metrics for any wireless network but both, SE and EE, usually conflict with each other. In this paper, we have done survey of different physical layer technologies like OFDMA, mm-wave, heterogeneous networks etc. and various radio resource allocation techniques to simultaneously optimize SE and EE in different wireless networks. The various network planning strategies such as reduction in cell size, cell zooming and dense deployment of base stations (BSs) are investigated to optimize EE besides SE of the wireless networks. The findings of survey paper also reveal different power control algorithms to optimize EE along with increasing the overall system capacity and number of users in the shared spectrum. The survey done in this work provides an essential understanding on the deployment of spectral and energy-efficient next-generation wireless networks.