Examinando por Autor "Figuera, Carlos"

Mostrando 1 - 2 de 2

Assessing IEEE 802.11 and IEEE 802.16 as Backhauling Technologies for 3G Small Cells in Rural Areas of Developing Countries
(Hindawi, 2019-01-17) Simó Reigadas, Francisco Javier; Figuera, Carlos; Morgado, Eduardo; Municio, Esteban; Martínez Fernández, Andrés
Mobile networks are experiencing a great development in urban areas worldwide, and developing countries are not an exception. However, sparsely populated rural areas in developing regions usually do not have any access to terrestrial communications networks because operators cannot ensure enough revenues to justify the required investments. Therefore, alternative low-cost solutions are needed for both the access network and the backhaul network. In this sense, in order to provide rural 3G coverage in small villages, state-of-the-art approaches propose to use Small Cells in access networks and inexpensive multihop wireless networks based on WiFi for long distances (WiLD) or WiMAX for backhauling them. These technologies provide most of the required capabilities; however, there is no complete knowledge about the performance of WiFi and WiMAX in long-distance links under quality of service constraints. The aim of this work is to provide a detailed overview of the different alternatives for building rural wireless backhaul networks. We compare both IEEE 802.11n and IEEE 802.16 distance-aware analytical models and validate them by extensive simulations and field experiments. Also WiFi-based TDMA proprietary solutions are evaluated experimentally and compared. Finally, results are used to model a real study case in the Peruvian Amazon in order to illustrate that the performance provided by these technologies may be sufficient for the backhaul network of a rural 3G access network based on Small Cells.
Wireless4x4: an integrating learning experience for Telecommunications students
(2011-03-10T15:41:19Z) Figuera, Carlos; Morgado, Eduardo; Gutiérrez Pérez, David; Alonso Atienza, Felipe; Arco Fernández-Cano, Eduardo del
The Telecommunications Engineering degree contains the study and understanding of a wide variety of knowledge areas, like signal theory and communications, computer networks or radio propagation. This diversity of fields makes it hard for the students to integrate all these knowledge, which in turns results essential to tackle real and practical problems that involve different subjects. As a response to this need of integration, in University Rey Juan Carlos an educational project based on Problem Based Learning (PBL), called the Wireles4x4 Project, has been carried out. In this project, groups of students build a complete system that is able to autonomously drive a radio controlled car, involving different technologies such as wireless communications, positioning systems, power management or system integration. The objectives of this educational project are: (1) The development of an active learning methodology, by which the students acquire integrated knowledge and skills on a variety of subjects; (2) The acquisition of professional skills like teamwork capabilities, oral and written communication, and long term task scheduling; (3) The participation of the students in an interdisciplinary engineering project with time and budgetary constraints. The results show that the participating students improve not only their specific knowledge on the involved issues, but also their capability of integrating different subjects of the degree and the skills for autonomous learning.)