Classification, recent advances and research challenges in energy efficient cellular networks

There is a growing interest in improving the energy efficiency of communication networks to reduce operational expenditures, to maintain profitability and to make cellular networks greenerThe revolution of green cellular networks has received significant attention from researchers, vendors, cellular service providers and governments, all of whom play important roles in the success of green networking technologyThis paper aims to present a comprehensive overview on current green techniques for wireless networks, highlighting the energy savings that can be achieved by each technique, as well as the challenges faced by these techniquesAdditionally, we present a summary of the essential research projects that have recently emerged for green mobile networks and display them as open research issues, thus providing researchers interested in pursuing this vision with the latest update.