Now showing items 1-20 of 613

  • 5G Infrastructures supporting end-user and operational services: the 5G-XHaul architectural perspective 

    Tzanakaki, Anna; Simeonidou, Dimitra; Berberana, Ignacio; Syrivelis, Dimitris; Camps Mur, Daniel; Seyfettin Demirkol, Ilker; Gutiérrez, Jesús; Wei, Qing; Fehske, Albrecht; Eiselt, Michael; Bartelt, Jens; Lyberopoulos, George; Grass, Eckhard; Anastasopoulos, Markos; Korakis, Thanasis; Flegkas, Paris; Pateromichelakis, Emmanouil; Grieger, Michael; Theodoropoulou, Eleni (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    We propose an optical-wireless 5G infrastructure offering converged fronthauling/backhauling functions to support both operational and end-user cloud services. A layered architectural structure required to efficiently ...
  • 5G microwave vs. millimeter-wave MIMO wireless mobile systems 

    Ballesteros Sánchez, Christian (Universitat Politècnica de Catalunya, 2018-07)
    Master thesis
    Open Access
    The next generation of wireless systems, 5G, is intended to cover plenty of new emerging applications such as utra-high resolution multimedia systems, industry 4.0, self-driving vehicles and smart cities. All those different ...
  • A centrality-based topology control protocol for wireless mesh networks 

    Vázquez Rodas, Andrés; Cruz Llopis, Luis Javier de la (Elsevier, 2015-01-01)
    Article
    Open Access
    Nodes in wireless multi-hop networks establish links with their neighbors, which are used for data transmission. In general, in this kind of networks every node has the possibility of acting as a router, forwarding the ...
  • Achievable data rate of coordinated multi-point transmission for visible light communications 

    Dowhuszko, Alexis; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Restricted access - publisher's policy
    This paper studies the sum data rate that a Visible Light Communication (VLC) system with multiple users canachieve when phosphor-converted white LED panels are usedto provide illumination and communication simultaneously. ...
  • A comprehensive method to taxonomize mechanical energy harvesting technologies 

    Diez, P.L.; Gabilondo, I.; Alarcón Cot, Eduardo José; Moll Echeto, Francisco de Borja (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Traditional industry is experiencing a worldwide development with Industry 4.0. Wireless sensor networks (WSNs) have a main role in this revolution as an essential part of data acquisition. The way in which WSNs are powered ...
  • A context-aware service architecture for the integration of body sensor networks and social networks through IP multimedia subsystem 

    Domingo Aladrén, Mari Carmen (2011-01-01)
    Article
    Restricted access - publisher's policy
    In this article a new context-aware architecture is proposed for the integration of body sensor networks and social networks through the IP Multimedia Subsystem. Its motivating application scenarios are described. The ...
  • A cross-layer scheduling algorithm for DQCA-based WLAN systems with heterogeneous voice-data traffic 

    Kartsakli, Elli; Cateura, Alex; Verikoukis, Christos; Alonso Zárate, Luis Gonzaga (ieee, 2005-09-30)
    Conference lecture
    Restricted access - publisher's policy
    This paper proposes a cross-layer priority-based scheduling algorithm for WLAN systems using the DQCA MAC protocol where heterogeneous voice-data traffic is present. In this algorithm voice users have always the highest ...
  • Adaptive generalized space shift keying 

    Ntontin, Konstantinos; Di Renzo, Marco; Pérez Neira, Ana Isabel; Verikoukis, Christos (2013-02-21)
    Article
    Open Access
    In this article, we propose a closed-loop precoding method for the Generalized Space Shift Keying (GSSK) modulation scheme, suitable for Multiple-Input-Single-Output (MISO) systems and denoted as adaptive GSSK (AGSSK), ...
  • Adaptive loading algorithms for optical OFDM transmission systems 

    Toporcer Korec, Norman (Universitat Politècnica de Catalunya, 2011-07-20)
    Bachelor thesis
    Open Access
  • Adding QoS support for timeliness to the observe extension of CoAP 

    Ludovici, Alessandro; García, Ernesto; Gimeno, Xavier; Calveras Augé, Anna M. (2012)
    Conference report
    Restricted access - publisher's policy
    In this paper, we propose a modification of the observe extension of CoAP to include Quality of Service (QoS) support for timeliness. The proposed QoS support is based on delivery priority. Nodes are able to express the ...
  • Addressing mobility issues in mobile environment 

    Zhang, Ji (Universitat Politècnica de Catalunya, 2008-10-09)
    Master thesis (pre-Bologna period)
    Open Access
  • A distributed algorithm for topology discovery in software-defined networks 

    Ochoa Aday, Leonardo; Cervelló Pastor, Cristina; Fernández Fernández, Adriana (Springer, 2016)
    Conference report
    Restricted access - publisher's policy
    To ensure a proficient topology discovery service in Software-Defined Networks (SDN), we propose a simple agents-based mechanism to improve the efficiency of the topology discovery process. In this work, an algorithm for ...
  • A dual-mode Ultra-Wideband wireless platform for remote patient monitoring systems 

    Bisbe Novoa, Sergi; Reyes Navarro, Carlos Alberto (Universitat Politècnica de Catalunya, 2012-07-11)
    Master thesis
    Open Access
    The combination of two factors demands the need to find a solution that guarantees the well-being of the people suffering from chronic diseases. On the one hand, the increase of the life expectancy leads to an older world's ...
  • Advanced Delivery System for 5G-enabled Photonic Networks 

    Gómez Gonzalvo, Alberto (Universitat Politècnica de Catalunya, 2014-05-21)
    Bachelor thesis
    Open Access
    Covenantee:  Danmarks tekniske universitet
    [ANGLÈS] The advent of mobile devices such as smartphones or tablets demanding high capacity services drives a solution for next generation wireless networks. Wireless and optical networks are converging to increase the ...
  • Advanced Solutions for High Capacity mm-wave Radio over Fiber Systems 

    Llorens Revull, Mònica (Universitat Politècnica de Catalunya, 2014-05-30)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Danmarks tekniske universitet
    [ANGLÈS] Currently, the usage of wireless devices and broadband communications is growing. As a consequence the research in how to implement high data rates in Radio over Fiber (RoF) links is becoming an interesting field ...
  • A fuzzy-based cluster-head selection system for WSNs: a comparison study for static and mobile sensors 

    Barolli, Leonard; Wang, Qi; Kulla, Ellis; Xhafa Xhafa, Fatos; Kamo, Bexhet; Takizawa, Makoto (IEEE Press. Institute of Electrical and Electronics Engineers, 2012)
    Conference report
    Restricted access - publisher's policy
  • A GA-based simulation system for WMNs: comparison analysis for different number of flows, client distributions, DCF and EDCA functions 

    Barolli, Admir; Oda, Tetsuya; Matsuo, Keita; Cuka, Miralda; Barolli, Leonard; Xhafa Xhafa, Fatos (Springer, 2017-02-04)
    Article
    Open Access
    In this paper, we compare the performance of Distributed Coordination Function (DCF) and Enhanced Distributed Channel Access (EDCA) for normal and uniform distributions of mesh clients considering two Wireless Mesh Network ...
  • A GA-based simulation system for WMNs: performance analysis for different WMN architectures considering transmission rate and OLRS protocol 

    Matsuo, Keita; Oda, Tetsuya; Barolli, Admir; Ikeda, Makoto; Barolli, Leonard; Xhafa Xhafa, Fatos (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    In this paper, we evaluate the performance of two WMN architectures considering throughput, delay, jitter and fairness index metrics. For simulations, we used ns-3. We compare the performance for two architectures considering ...
  • A genetic algorithm-based system for Wireless Mesh Networks: analysis of system data considering different routing protocols and architectures 

    Oda, Tetsuya; Elmazi, Donald; Barolli, Admir; Sakamoto, Shinji; Barolli, Leonard; Xhafa Xhafa, Fatos (Springer, 2016-07-01)
    Article
    Open Access
    Wireless mesh networks (WMNs) are attracting a lot of attention from wireless network researchers. Node placement problems have been investigated for a long time in the optimization field due to numerous applications in ...
  • Ajust d’un model de propagació en LTE en la banda 800 MHz amb una eina de simulació i planificació de la xarxa 

    Garin Ureña, Guillem (Universitat Politècnica de Catalunya, 2019-01-30)
    Bachelor thesis
    Restricted access - confidentiality agreement
    Covenantee:  Cellnex Telecom
    The main objective of the project is to make an adjustment of a propagation model in the 800 MHz band for LTE with the ICS planning tool. To do so, the methodology is exposed to achieve the most optimal propagation model ...