This book has provided a thorough discussion of research trends in the field of energy-efficient wireless systems and networks. Our treatment of this topic has been presented in three main parts. The first part described new mathematical tools and concepts that can be used to analyze communication systems in order that they can be configured to operate in a very energy-efficient manner. The second part of this book moved on to discuss how wireless devices and networks can be powered using either renewable energy sources, such as wind or solar power, or even by energy harvesting, where a radio receiver can exploit the energy available from the radio spectrum directly. The final part of this book explores a number of promising new technologies for energy-efficient operation, including concepts such as massive multiple input multiple output (MIMO), interference cancellation approaches, and innovative visible light communications. Ever since the 3GPP standards body defined the first new radio release 15 in mid-2018, the evolution of fifth-generation (5G) wireless technologies has progressed with new opportunities to improve the energy efficiency [1]. In this concluding chapter, we discuss some of them and take a look into several promising green solutions for the realization of 5G phase II and beyond. These points are organized into two main sections, dealing with “Flattening the Energy Curve to Support 5G Evolution” and “Potential Solutions for a Green Future".

Chapter Contents:

• 15.1 Flattening the energy curve to support 5G evolution
• 15.2 Potential solutions for a greener future
• References

Inspec keywords: free-space optical communication; telecommunication power management; energy conservation; interference suppression; 5G mobile communication; MIMO communication; radio receivers; telecommunication standards; mathematical analysis; energy harvesting; renewable energy sources

Other keywords: radio spectrum; visible light communications; energy-efficient wireless systems; energy harvesting; green future; MIMO; 5G wireless technologies; massive multiple input multiple output; energy efficiency; interference cancellation; fifth-generation wireless technology; 5G phase II; wireless devices; green solutions; wireless networks; energy curve flattening; communication systems; 5G evolution; 3GPP standards; renewable energy sources; mathematical tools; radio receiver

Subjects: Electromagnetic compatibility and interference; Mathematical analysis; Telecommunication systems (energy utilisation); Mobile radio systems; Energy harvesting; Energy harvesting; Free-space optical links