Antonio Sánchez works in one of the largest multinational telecommunications operator (Europe and Americas), and is an Honorary Collaborator at the University of Valladolid, Spain. He earned his MSc in Telecommunications Engineering and PhD in Telecommunications from the University of Valladolid. Dr. Sánchez is an IEEE Senior Member, and editor of IEEE Communications Magazine. Belén Carro is an Associate Professor at the University of Valladolid, Spain, as well as the Director of Communication Services and Networks research group. She earned her MSc in Telecommunications Engineering and PhD in Telecommunications from the University of Valladolid. She has been guest editor for IEEE Network, IEEE Wireless Communications, and IEEE Communications Magazine.