This paper reviews the impact of the advent of 5G (fifth generation) over the architecture of the mobile networks. To do so, a methodological proposal that would allow a systematic and orderly review of a large amount of information from multiple sources and facilitate the analysis of the most important components, was necessary. In addition, three types of entities were taken into account: the Academy, represented by the universities; the Industry, represented by the most important Information and Communication Technologies (ICT) companies and the mobile network operators; and the standardization organizations, in charge of standardizing, evaluate and socialize the technological developments related to 5G. The paper pursues three main objectives: analyze the 5G architectural proposals from the different entities and select, based on a set of criteria, the most appropriate; characterize the technologies, protocols and services that will be main characters in the new generation of mobile networks; and evaluate the previous components, in the framework of the selected network architecture and the established requirements for 5G. In the paper, a global and complete image about the fifth mobile networks generation, and the leadership of the academy, industry and the standardization organizations, is presented.