Browsing by Subject "Wireless communication systems."

Now showing items 1-12 of 12

    • Channel Holding Time Distribution in Public Cellular Telephony 

      Barceló Arroyo, Francisco; Jordán, Javier (Elsevier Science B.V., 1999-06)
      Conference lecture
      Open Access
      This paper examines the channel holding time of public cellular telephony systems. This is the time that the Mobile Station (MS) remains in the same cell, a fraction of the call holding time. The study is based on actual ...

    • Cognitive control channels for the cooperation of opportunistic and composite wireless networks 

      Gebert, Jens; Georgakopoulos, Andreas; Stavroulaki, Vera; Tsagkaris, Kostas; Ferrús Ferré, Ramón Antonio; Demestichas, Panagiotis (2011)
      Conference report
      Open Access
      Opportunistic networks (ONs) are considered as coordinated extensions of a radio access network infrastructure, which are dynamically and temporarily created in an infrastructure-less manner in order to increase service ...

    • Control channels for the cooperation of cognitive management systems in opportunistic and composite wireless networks 

      Stavroulaki, Vera; Tsagkaris, Kostas; Georgakopoulos, Andreas; Demestichas, Panagiotis; Ferrús Ferré, Ramón Antonio; Filo, Marcin (2011)
      Conference report
      Open Access
      Opportunistic Networks (ONs) are assumed to be temporary, localized extensions of the infrastructure network that are created under certain circumstances. According to that vision, ONs are coordinated by the radio ...

    • Distributed channel assignment algorithm based on simulated annealing for uncoordinated OSA-enabled WLANs 

      Novillo Parales, Francisco Vicente; Ferrús Ferré, Ramón Antonio (2011)
      Conference report
      Restricted access - publisher's policy
      A promising approach to alleviate ISM band congestion problems in highly dense WLAN scenarios consists of exploiting opportunistic spectrum access (OSA) to underutilized bands under a primary-secondary model. This paper ...

    • Evaluation and monitoring of wireless community networks 

      Madonar Soria, Sergi (Universitat Politècnica de Catalunya, 2013-07-01)
      Master thesis
      Open Access
      En les darreres dècades s’han produït molts canvis en l’àmbit de les telecomunicacions, gran part d’aquest canvi ha estat propiciat per l’aparició d’Internet, la “xarxa de xarxes” capaç de connectar usuaris a gairebé ...

    • Formulation, implementation considerations, and first performance evaluation of algorithmic solutions - D4.1 

      Tsagkaris, Kostas; Sallent Roig, Oriol; Pérez Romero, Jordi; Bouali, Faouzi; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon; Fuchs, Rolf; Gebert, Jens; Logothetis, Marios; Georgakopoulos, Andreas; Stavroulaki, Vera; Riaz, Maryam; Shariat, Shahin; Bourdelles, Michel; Koutsouris, Nikos; Sarli, Asimina; Papadopoulou, Louisa-Magdalene; Akezidou, Maria; Bantouna, Aimilia; Thomatos, Evangelos; Tzifa, Lia; Kritikou, Yiouli; Demestichas, Panagiotis; Fracchia, Roberta; Lee, Haeyoung; Mouton, Christian; Rakotoharison, Lanto; Sarvanko, Heli; Lécroart, Benoit; Mustonen, Miia; Matinmikko, Marja; Pega, Stéphane; Tosic, M. (2011-05)
      Research report
      Open Access
      This deliverable contains a first version of the algorithmic solutions for enabling opportunistic networks. The presented algorithms cover the full range of identified management tasks: suitability, creation, QoS control, ...

    • Formulations and identification of algorithmic solutions for enabling opportunistic networks - M4.1 

      Gebert, Jens; Pega, Stéphane; Bourdellès, Michel; Demestichas, Panagiotis; Tsagkaris, Kostas; Sallent Roig, Oriol; Pérez Romero, Jordi; Bouali, Faouzi; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon; Logothetis, Marios; Georgakopoulos, Andreas; Stavroulaki, Vera (2011-04-30)
      Research report
      Open Access
      This document contains a detailed description of the algorithms to be implemented to manage the opportunistic networks. There are defined according to the functional and system architecture (WP2) to fulfil the technical ...

    • Isofrequency-reconfigurable 8-bit RF repeater 

      Díaz Tapia, Edgar; Grau, Alfred; Rodriguez De Luis, Javier; de Flaviis, Franco; Jofre Roca, Lluís (2011-11-02)
      Article
      Restricted access - publisher's policy
      A novel isofrequency-reconfigurable RF repeater operating at 4.5 GHz is presented. The repeater uses a total of eight reconfigurable parasitic dipole elements to enhance and reconfigure the isolation level between the ...

    • Medium and mobility behaviour insertion for 802.11 emulated networks 

      Martínez Illán, Alberto (Universitat Politècnica de Catalunya, 2013-10-03)
      Master thesis
      Open Access
      Wmediumd és una aplicació basada en el llenguatge de programació C i que va ser desemvolupada per una consultora d’Estats Units anomenada Cozybit. Wmediumd va ser creada per dur a terme emulació del medi sense fils a ...

    • Proposal of C4MS and inherent technical challenges – D3.1 

      Moreno, Oscar; Gebert, Jens; Filo, Marcin; Sroka, Krystian; Muck, Markus; Schmidt, Andreas; Lécroart, Benoit; Mouton, Christian; Rakotoharison, Lanto; Mustonen, Miia; Matinmikko, Marja; Tsagkaris, Kostas; Stavroulaki, Vera; Koutsouris, Nikos; Georgakopoulos, Andreas; Demestichas, Panagiotis; Sallent Roig, Oriol; Ferrús Ferré, Ramón Antonio; Vahid, Seiamak; Sarvanko, Heli (2011-03-31)
      Research report
      Open Access
      The scope of OneFIT is on Opportunistic etworks and Cognitive Management Systems for Efficient Application Provision in the uture Internet. This document contains a proposal of Control Channels for Coordination of ...

    • Proxy performance analysis in a community wireless network 

      Pitarch Miguel, Pablo (Universitat Politècnica de Catalunya, 2013-10-21)
      Master thesis
      Open Access
      Since the connection to the Internet has becoming a fundamental issue to the development of the society more and more improvements and new access technologies have appeared. Guifi.net proposes a free, neutral and open ...

    • Understanding the IEEE 1451 standard in 6loWPAN sensor networks 

      Higuera Portilla, Jorge Eduardo; Polo Cantero, José (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
      Conference report
      Open Access
      The adoption of the IPv6 networking in IEEE 802.15.4 sensor networks, using IEEE 1451 standardization, increases the interoperability of low-power smart sensor devices in IP networks. This paper explains the design and ...