Suchergebnisse

The mobile market until a decade ago had been composed mainly of Mobile Network Operators (MNOs). To promote greater competition in this market the European Commission (EC) has promoted various actions in the regulatory and policy environment in Europe. This has significantly facilitated the appearance of new players in this market, such as Mobile Virtual Network Operators (MVNOs), which in the case of the Spanish mobile market grew from 4 MNOs to 38 non-homogeneous operators by early 2017. This paper presents an assessment of the economic feasibility of the entry of a new Full-Mobile Virtual Network Operator (F-MVNO) in the Spanish mobile market. This operator does not own band rights and therefore has to negotiate with a host operator (HO) for use of spectrum and has to provide the suitable and necessary devices that route and switch calls. Moreover, it has to ensure the interoperability of its own services with other operators and has to manage the services and traffic generated by its own subscribers. The examples of evaluation analyzed in this work consider six different scenarios over five years. The evaluation for each scenario calculates the average return per user (ARPU) or the income per subscriber and the fixed and variable costs needed to provide the proposed services. The data used in this evaluation are provided by the National Commission for Markets and Competition, NCMC or "la Comisión Nacional de los Mercados y la Competencia, CNMC" in Spain [1], which is in charge of publishing quarterly the available data about the Spanish mobile market. The results show for each scenario the minimum number of subscribers that a new F-MVNO needs to ensure its economic feasibility (break-even point) and the time necessary to reach it. The methodology used in this work may also serve as a guide to assess the economic feasibility of new F-MVNOs entering in other European countries. ; Peer Reviewed ; Postprint (published version)

"The final publication is available at Springer via http://dx.doi.org/10.1007/s10588-013-9156-z ; We present a new mathematical model that predicts the number of users informed and influenced by messages that are propagated in an online social network. Our model is based on a new way of quantifying the tie-strength, which in turn considers the affinity and relevance between nodes. We could verify that the messages to inform and influence, as well as their importance, produce different propagation behaviors in an online social network. We carried out laboratory tests with our model and with the baseline models Linear Threshold and Independent Cascade, which are currently used in many scientific works. The results were evaluated by comparing them with empirical data. The tests show conclusively that the predictions of our model are notably more accurate and precise than the predictions of the baseline models. Our model can contribute to the development of models that maximize the propagation of messages; to predict the spread of viruses in computer networks, mobile telephony and online social networks. ; This work was carried out by the financing of the Ecuadorian government of President Rafael Correa D. and by FLAMINGO, a Network of Excellence project (318488) supported by the European Commission under the Seventh Framework Program and the project TEC2015-71329-C2-2-R (MINECO/FEDER) from Ministerio de Economía y Competitividad. R.M.O-G. thanks Dr. Joan Serrat Fernández, Dr. Xavier Muñoz and Dr. Josep Fàbrega, professors at the University Polytechnic of Catalonia. Similarly, Dr. Esteban Samaniego Alvarado and PhD student Vladimiro Tobar Solano, professors at Universidad de Cuenca, and the PhD student Lucía Mendez Tapia for the accomplishment of this work. ; Peer Reviewed ; Postprint (author's final draft)