Wireless sensor networks 41 Internet of things 33 Wireless networks 27 Energy efficiency 25 Performance 24 5G mobile communication systems 20 Wireless communications 20 Sensor nodes 19 Deep learning 18 Antennas 17 Energy utilization 16 Quality of service 16 Wireless local area networks (WLAN) 16 Learning algorithms 15 Deep neural networks 14 Optimisations 14 Artificial intelligence 13 Network architecture 13 Network security 13 Costs 12 Mobile telecommunication systems 12 Unmanned aerial vehicles (UAV) 12 Wi-Fi 12 Wireless communication 12 Neural networks 11 Neural-networks 11 Students 11 wireless sensor networks 11 Energy harvesting 10 Forecasting 10