Green Communications and Computing Networks

The articles in this special section focus on green communications and computing (GCC). GCC has been an active and will be a long lasting important field for technological research and development, although, in diff erent stages, GCC may have diff erent focuses and characteristics. In the near future, there will be three diff erent, correlated, and important relevant directions and focuses: green Internet of Things (IoT] green fi fth generation (5G) wireless systems, and big data meeting green challenges. The IoT refers to internetwork physical sensors, devices, and entities to enable collecting and exchanging data and signals. There are a number of concepts relevant to green IoT in diff erent contexts, such as green cyber-physical systems, green machine-to-machine communications, and green device-to-device communications.