Fundamental optimization criteria for Green wireless communications

Traditional wireless networks mainly focus on providing ubiquitous access and large capacity. One of the main challenges for future information and communication systems and technologies, including wireless networks, is reduction of the power consumption. Recent analysis by manufacturers and network operators have shown that current wireless networks are not very energy efficient, particularly the base stations that are used as access points from network to services. This paper presents an overview of the most important topics in research and practice for energy efficient mobile radio networks. Green radio researches propose four fundamental tradeoffs: deployment efficiency-energy efficiency, spectrum efficiency-energy efficiency, bandwidth-power, and delay-power, which are presented in this paper.