 combination with future extended bands in order to comply with coverage/capacity requirements. Advanced network implementation and operation: more flexible network design and deployment are foreseen using network function virtualization and software- defined networks, aided by machine learning and artificial intelligence techniques in order to carry out complex orchestration tasks. Flexibility in terms of service 8 Implementation of Context-Aware Environments with Massive IoT Systems provision is achieved by taking advantage of network slicing and implementation time, and cost can be accelerated by means of initiatives such as Open RAN (O- RAN), providing an open source/open hardware architecture. In addition, new security considerations and mechanisms are being studied, in order to consider end-to-end security, quantum communications, or distributed authentication, among others. In relation to the network architecture, a more extensive configu- ration is foreseen, including satellite constellations, high-altitude platforms, and unmanned air vehicles, among others. Advanced air interface: further evolutions are being proposed in order to fully enhance the physical layer characteristics in B5G/6G systems. In this sense, different approaches are followed, such as the use of massive MIMO, intelligent reflecting surfaces, coordinated multipoint (such as cooperative MIMO), and new modulation schemes (such as evolutions in OFDMA or the use of power domain non-orthogonal multiple access, PD-NOMA). Extended spectrum use is one of the main characteristics within B5G/6G communication systems, opening the path to enhanced communication capabilities for applications such as unmanned aerial vehicles in mm-wave range, providing integrated access and backhaul communication capabilities [8]. This extended spec- tral usage requires characterization of wireless channel characteristics in relation to gain insight of parameters such as path loss in order to perform coverage/capacity estimations. In this sense, propagation losses in