Thesis abstract Vehicular communication technologies have been increasingly spread in the last decades. They have been studied and deployed, altought they will not find a com- mercial solution before 2020. The concept of Intelligent Transport System and ve- hicular networks, alongside the one of smart city, is one of the biggest achievement of technology in the field of vehicular safety, environment health and commercial convenience. This evolution is brought on by a big technology, that recently made another step. Cellular V2X is the possibility of a vehicular network to relay (partially or totally) on a cellular network, already deployed, therefore stable, and bring to users several advantages and novelties.