1. Internet of things (IoT) connected devices worldwide in 2019 and 2030, by technology;Vailshery,2021
2. Worldwide internet of things forecast update, 2020–2024;MacGillivray,2021
3. Cloud radio access network (C-RAN): a primer;Wu;IEEE Netw,2015
4. Heterogeneous cloud radio access networks: a new perspective for enhancing spectral and energy efficiencies;Peng;IEEE Wirel Commun,2014
5. Fog radio access networks: Mobility management, interference mitigation and resource optimization;Zhang;IEEE Wirel Commun,2017