Green internet of things (IoT): An overview

Internet of Things (IoT) connects everything in the smart world, and thus, energy consumption of IoT technology is a challenge and attractive research area. Motivated by achieving a low power consumption IoT, a green IoT is proposed. This paper provides an overview regarding green IoT. It also discusses the life cycle of green IoT which contains green design, green production, green utilization, and green recycling. Furthermore, green IoT technologies such as green tags, green sensing networks and green internet technologies are discussed. In addition, studies of IoT in 5G and IoT for smart cities are presented. Finally, future research directions and open challenges about green IoT are presented.