Energy-Efficient RIS-Assisted Satellites for IoT Networks

The use of satellites to provide ubiquitous coverage and connectivity for densely deployed Internet Things (IoT) networks is expected be a reality in emerging 6G networks. Yet the low battery capacity IoT nodes constitutes problem their direct satellites, which are located at altitudes up 2000 km. In this article, we propose novel architecture involving reconfigurable intelligent surface (RIS) units mitigate path loss associated with long transmission distances. These RIS can placed on satellite reflectarrays, and, when used broadcasting beamforming, they significant gains signal transmission. This study shows that RIS-assisted 10 5 times higher downlink achievable uplink rates