Now showing items 39-58 of 58

  • On the controller placement for designing a distributed SDN control layer 

    Jiménez Agudelo, Yury Andrea; Cervelló Pastor, Cristina; García García, Aurelio Javier (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference lecture
    Open Access
    The software-defined network (SDN) advocates a centralized network control, where a controller manages a network from a global view of the network. Large SDN networks may consist of multiple controllers or controller domains ...
  • Opportunistic scheduling for WLAN systems using cross-layer techniques and a distributed MAC 

    Cateura, A; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2005)
    Conference lecture
    Restricted access - publisher's policy
    This paper proposes a novel Cross-Layer optimization mechanism for WLAN systems and analyses its performance in terms of throughput and mean packet delay. The proposed scheme makes use of a MAC-PHY interaction and a ...
  • Optimal MISO pre-equalization for filter bank multicarrier systems 

    Caus López, Marius; Pérez Neira, Ana Isabel (2009)
    Conference report
    Restricted access - publisher's policy
    One of the phenomena that degrades the performance of multicarrier modulation (MCM) systems is the spectral nulls that multipath channel may have. As a result, the affected subcarrier signals may be severely degraded ...
  • Optimització de xarxes a partir del grau d'intermediació dels enllaços 

    Gallegos Cervilla, Rubén (Universitat Politècnica de Catalunya, 2011-09-07)
    Master thesis (pre-Bologna period)
    Open Access
    English: In this project we study the optimization of a complex network based on the geographical length of the links and the number of geodesic paths that go through them (edge betweenness). By considering relevant ...
  • Optimization of inter-domain presence traffic based on privacy rule sharing: performance and impact on the IMS 

    Beltrán Martínez, María Victoria; Paradells Aspas, Josep (2012)
    Article
    Restricted access - publisher's policy
    Presence information was the key enabler of the great success of instant messaging applications. This information was first limited to simple binary states such as online, offline, or busy. However, it is currently evolving ...
  • Performace evaluation of geographic and topological routing protocols for Vehicular Ad.hoc Networks 

    Marín Sánchez, David (Universitat Politècnica de Catalunya, 2012-05-25)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] VANETs (Vehicular Ad-hoc Networks) are an emerging new technology which integrates the capabilities of new generation wireless networks to vehicles. It includes a variety of applications such as co-operative traffic ...
  • Performance evaluation of realistic scenarios for vehicular ad hoc networks with CityMob and NCTUns simulators 

    Pastor Perez, Diego (Universitat Politècnica de Catalunya, 2011-06-16)
    Master thesis (pre-Bologna period)
    Open Access
    Català: El continu creixement del parc automobilístic a nivell mundial ha obert noves oportunitats de negoci i noves necessitats de seguretat viària. La mobilitat constant dels individus i la necessitat d'estar sempre ...
  • Performance evaluation of two-fuzzy based cluster head selection systems for wireless sensor networks 

    Anno, Junpei; Barolli, Leonard; Durresi, Arjan; Xhafa Xhafa, Fatos; Koyama, Akio (2008-01-01)
    Article
    Restricted access - publisher's policy
    Sensor networks supported by recent technological advances in low power wireless communications along with silicon integration of various functionalities are emerging as a critically important computer class that enable ...
  • Pico Cell Range Expansion toward LTE-Advanced Wireless Heterogeneous Networks 

    Joud, Mohammad Ahmad (Universitat Politècnica de Catalunya, 2013-01-14)
    Master thesis
    Open Access
    [ANGLÈS] Deploying low power nodes within a macro cell layout, also known as heterogeneous networks (HetNets), is a promising solution to enhance the global performance of LTE mobile communication systems and particularly ...
  • Plantejament d'una solució per gestionar eficientment l'espectre en escenaris de Home Networking 

    Casellas Lopez, Francesc (Universitat Politècnica de Catalunya, 2011-04-06)
    Master thesis (pre-Bologna period)
    Open Access
    Català: En aquest projecte es realitza un estudi qualitatiu del grau de congestió i utilització de l'espectre radioelèctric en escenaris de Home Networking, a la vegada que es proposa una solució a aquesta problemàtica.
  • Potential Theory for boundary value problems on finite networks 

    Bendito Pérez, Enrique; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos; Gesto Beiroa, José Manuel (2006-07)
    Article
    Open Access
    We aim here at analyzing self-adjoint boundary value problems on finite networks associated with positive semi-definite Schrödinger operators. In addition, we study the existence and uniqueness of solutions and its ...
  • Proyecto de comunicación para las comunidades indígenas de Nicaragua 

    Bueno Rodríguez, Jose Daniel (Universitat Politècnica de Catalunya, 2009-01)
    Master thesis (pre-Bologna period)
    Open Access
    Para el desarrollo de este proyecto se plantearon tres fases bien marcadas: 1ª Fase. Establecimiento de las necesidades de la red. • Realizar los primeros contactos con la contraparte y los beneficiarios directos del ...
  • Random walks on temporal networks 

    Starnini, Michele; Baronchelli, Andrea; Barrat, Alain; Pastor Satorras, Romualdo (2012)
    Article
    Open Access
    Many natural and artificial networks evolve in time. Nodes and connections appear and disappear at various time scales, and their dynamics has profound consequences for any processes in which they are involved. The first ...
  • Robustness optimization via link additions 

    Sánchez Martínez, Mari Carmen (Universitat Politècnica de Catalunya, 2009-07-13)
    Master thesis
    Open Access
    Robustness is the ability of networks to avoid malfunction. Networks could be subject to failures, viruses, removals of links and other attacks. There are several researches about how to measure or improve the ...
  • Simulació de sistemes Trunking 

    Barceló Arroyo, Francisco; Navarro Ezquerra, Marta (Edicions UPC, 2001)
    Book
    Restricted access to the UPC academic community
    Aquest llibre correspon al manual de practiques d’un simulador de comunicacions mòbils PMR. La pràctica a la qual fa referència el document cobreix els aspectes relacionats amb el tràfic, la avaluació i el dimensionament ...
  • Study of Negative effects of Traffic Localization 

    Mira Sánchez, César (Universitat Politècnica de Catalunya, 2011-06-28)
    Master thesis (pre-Bologna period)
    Open Access
    Català: Les xarxes P2P s'han convertit en una important xarxa per usuaris i ISP. Els usuaris volen compartir i aprofitar aquestes noves xarxes. D'altra banda, els ISP no volen que els usuaris utilitzin de manera tan intensa ...
  • Video quality evaluation in IP videoconference between fixed and mobile devices 

    Canadell Pulido, Josep Antoni (Universitat Politècnica de Catalunya, 2008-11-06)
    Master thesis
    Open Access
    The integration of the mobile network with the fixed network, by using IP, has allowed the appearance of packet-based videoconference between fixed and mobile devices. Current mobile IP networks are sized for http traffic ...
  • Virtualization resource federation and administration 

    Vidiella Pinto, Sergio (Universitat Politècnica de Catalunya, 2014-06)
    Bachelor thesis
    Restricted access - author's decision
    [ANGLÈS] The growth of the Internet has become a very complex challenge in terms of the operation and management of the Internet network infrastructure. In order to overcome this problem, new  ideas must be tested and ...
  • Virtualization-enabled Adaptive Routing for QoS-aware Software-Defined Networks 

    Xifra Porxas, Alba (Universitat Politècnica de Catalunya, 2014-12)
    Master thesis (pre-Bologna period)
    12 months embargo
    [ANGLÈS] Software-Defined Networking (SDN) has been recognized as the next-generation networking paradigm. It is a fast-evolving technology that decouples the network data plane, which are the network devices that forward ...
  • Wireless communication system design for refugee camps and conflict areas 

    Antó Espelta, Ismael (Universitat Politècnica de Catalunya, 2014-07-22)
    Bachelor thesis
    Open Access
    [ANGLÈS] The specific goal of this project is to design a telecommunication system for a refugee camp, answering to a Doctors Without Borders’ request. The camp is located in an isolated rural area where it is impossible ...