The energy efficiency has become a new key criterion for designing wireless networks, not only because of the environmental concerns but also because of the practical reasons of the players participating in the end-to-end path of wireless networks. The energy consumption of a network increases with the density of access points. Thus, to save operational costs, it becomes critical for a network operator to reduce the energy consumption of a communication system. Even though the capacity of batteries for wireless terminals keeps increasing, the increase rate is not fast enough to satisfy users’ expectations. Therefore, an energy efficient scheme to save the energy of handheld devices is needed to enlarge their lifetime. In addition, as the IoT services become vitalized, a huge number of sensor nodes are deployed. Usually, IoT nodes are required to function from a few months to a few years without recharging once they are installed. Considering the importance of the energy efficient wireless networks, collecting recent advancements on the energy efficient wireless networks is required to crystalize future research direction. In this special issue, we solicit contributions from academia and industry on the recent activities that tackle the challenges.

Potential topics include but are not limited to the following:

• Energy efficient wireless network architecture
• Energy efficient Internet of Things systems
• Energy efficient secure networks
• Energy efficient self-organizing networks
• Energy efficient edge networking
• Energy efficient interference control
• Energy efficient network resource management
• Energy efficient quality of service provisioning
• Energy harvesting and transfer
• Energy optimization of wireless terminals
• Analysis of the tradeoff between energy efficiency and other performance metrics