1. National Research Council (CNR), Institute of Electronics, Computer and Telecommunication Engineering (IEIIT), Wireless Communication Group, Bologna, Italy
2. Internet of Things (IoT) Lab, Department of Engineering and Architecture, University of Parma, Parma, Italy
3. Department of Technology, Federal University of São João del-Rei (UFSJ), São João del-Rei, MG, Brazil
4. Vodafone Group Research and Development, Newbury, UK