Now showing items 1-20 of 820

    • 3D beamsteering low complexity reconfigurable multilevel antenna 

      Zhou, Ivan; Ramirez, German; Montero, Luca; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (2020-04)
      Article
      Open Access
      A low-complexity reconfigurable antenna (RA) capable of steering its beam into nine different directions corresponding to ¿={-42°,0°,42°} in the ¿={25°,0°,155°} planes, and ¿=±25° in the ¿=90° plane, using a reduced number ...
    • 3MRP+: an improved multimetric geographical routing protocol for VANETs 

      Lemus Cárdenas, Leticia; Mezher, Ahmad Mohamad; López Márquez, Nely Patricia; Barbecho Bautista, Pablo Andrés; Cárdenas Barrera, Julián; Aguilar Igartua, Mónica (Association for Computing Machinery (ACM), 2018)
      Conference report
      Restricted access - publisher's policy
      The design of routing protocols in vehicular ad hoc networks (VANETs) is fundamental to achieve a high packets’ delivery ratio. Routing protocols whose operation considers the nodes’ positions use updated routing information ...
    • 5G Infrastructures supporting end-user and operational services: the 5G-XHaul architectural perspective 

      Tzanakaki, Anna; Simeonidou, Dimitra; Berberana, Ignacio; Syrivelis, Dimitris; Camps Mur, Daniel; Demirkol, Ilker Seyfettin; 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 ...
    • A comparison study of two fuzzy-based handover systems for avoiding ping-pong effect in Wireless Cellular Networks 

      Mino, Gjergji; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (Institute of Electrical and Electronics Engineers (IEEE), 2009)
      Conference report
      Open Access
      Wireless mobile networks and devices are becoming increasingly popular to provide users the access anytime and anywhere. The mobile systems are based on cellular approach and the area is covered by cells that overlap each ...
    • 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 cooperative ARQ for delay-tolerant vehicular networks 

      Morillo Pozo, Julián David; Trullols Cruces, Óscar; Barceló Ordinas, José María; García Vidal, Jorge (2008-07-25)
      Conference report
      Open Access
      This paper proposes a Cooperative ARQ protocol to be used in delay-tolerant vehicular networks. The proposed scheme has been implemented and evaluated through an experimental testbed, showing that packet losses in ...
    • A dataset to evaluate IEEE 802.15.4g sun for dependable low-power wireless communications in industrial scenarios 

      Tuset Peiro, Pere; Cuerva Contreras, Eva; Egusquiza Estévez, Eduard; Vilajosana Guillén, Xavier (2020-09-01)
      Article
      Open Access
      This article presents a dataset obtained from the deployment of an IEEE 802.15.4g SUN (Smart Utility Network) single-hop network (11 nodes) in a large industrial scenario (110,044 m 2 ) for a long period of time (99 days). ...
    • A deep reinforcement learning approach for optimization and task-offloading of mobile edge computing in virtual radio access networks 

      Biosca Caro, Jordi (Universitat Politècnica de Catalunya, 2020-10-15)
      Master thesis
      12 months embargo
      Covenantee:   Technische Universiteit Eindhoven
      Mobile systems are increasing in number and, in the future, exponential growth is expected with the deployment of new technologies like 5G and Internet of Things. Requirements from those technologies lead to an improvement ...
    • 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 ...
    • A fuzzy-based CAC scheme for wireless cellular networks considering different priorities 

      Ikebata, Taku; Mino, Gjergji; Barolli, Leonard; Koyama, Akio; Durresi, Arjan; Xhafa Xhafa, Fatos (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Open Access
      The mobile cellular systems are expected to support multiple services with guaranteed Quality of Service(QoS). But, the ability of wireless systems to accommodate expected growth of traffic load and broadband services is ...
    • 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 ...
    • A GRASP meta-heuristic for evaluating the latency and lifetime impact of critical nodes in large wireless sensor networks 

      Sembroiz Ausejo, David; Ojaghi Kahjogh, Behnam; Careglio, Davide; Ricciardi, Sergio (Multidisciplinary Digital Publishing Institute, 2019-11-01)
      Article
      Open Access
      Wireless Sensor Networks (WSN) have lately been gaining momentum thanks to the hardware improvements and standardization software efforts. Moreover, the appearance of Internet of Things (IoT) and its reliance on sensors ...
    • A long term evolution link level simulator 

      Serra Pagès, Albert (Universitat Politècnica de Catalunya, 2009-02)
      Master thesis
      Open Access
    • A minimalistic distance-vector routing protocol for LoRa mesh networks 

      Pueyo Centelles, Roger; Freitag, Fèlix; Meseguer Pallarès, Roc; Navarro Moldes, Leandro (2021-06-15)
      External research report
      Open Access
      LoRa has gained traction in the Internet of Things (IoT) domain as a Low Power, Wide Area Network(LPWAN) radio technology, providing low-power and long-range communication in the sub-GHz band. Most often it is used as part ...
    • A new approach to exploit channel power imbalance in distributed antenna systems with fiber fronthaul 

      Dowhuszko, Alexis; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      Cloud Modulation (CM) is a novel transmission method that mitigates the non-linear impairments introduced by the Radio-over-Fiber (RoF) links of a distributed antenna system. In CM, constant-envelope phase-modulated radio ...