Wireless cellular networks feature two emerging technological trends. The first is the direct Device-to-Device (D2D) communications, which enables direct links between the wireless devices that reutilize the cellular spectrum and radio interface. The second is that of Machine-Type Communications (MTC), where the objective is to attach a large number of lowrate low-power devices, termed Machine-...

The deployment of D2D communications (also known as ProSe or sidelink transmissions) in cellular networks benefits from proximity, multi-hop, and spatial reuse gains. In this article, we first describe the main advancements NR compared to LTE-A sidelink. Then, run a simulation campaign test D2D-based for public safety factory automation scenarios with their mission-critical requirements ultra-r...

In this paper, we propose a novel optimization model for multiple Unmanned Aerial Vehicles (UAVs) working simultaneously as relays to help two set of ground users; namely relay users and device-to-device (D2D) users. The are assumed out communication rages from each other use the UAV link their data transmission. While D2D be nearby managing resources without being involved in goal paper is ope...