Exploració per tema "Xarxes de comunicacions"

Ara es mostren els items 45-64 de 74

    • LoRa protocol. Evaluations, limitations and practical test 

      Ruano Lin, Eduard (Universitat Politècnica de Catalunya, 2016-05-11)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Institut national polytechnique de Grenoble
      The aim of this study is to shed light on the new LoRaTM protocol, one of the many technologies that is presented as the definitive solution to cover the increasing needs of the Low Power Wide Area Networks created to ...

    • MAC-PHY enhancement for 802.11b WLAN systems via cross-layering 

      Alonso Zárate, Luis Gonzaga; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2003)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The paper analyses the performance of a novel MAC-PHY scheme for wireless local area networks (WLAN) that makes use of distributed queues and cross-layer concepts to improve radio channel utilisation. Analytical values for ...

    • Maximum Coverage at Minimum Cost for Multi-Domain IP/MPLS Networks 

      Yannuzzi, Marcelo; Masip Bruin, Xavier; Serral Gracià, René; Marín Tordera, Eva; Sprintson, Alex; Orda, Ariel (IEEE Computer Society Publications, 2008)
      Text en actes de congrés
      Accés obert
      At present, service providers have several incentives to extend the reach of long-lived MPLS paths across domains. Providers, however, will face a number of trade-offs while choosing the optimal set of MPLS paths to be ...

    • Metaconsola para monitorización de infraestructuras y servicios 

      Riba Santos, Corina Isabel (Universitat Politècnica de Catalunya, 2016-10)
      Projecte/Treball Final de Carrera
      Accés restringit per acord de confidencialitat

    • Migración de la red de comunicaciones de un cliente de servicios de red 

      Navarro Betrián, Jose Antonio (Universitat Politècnica de Catalunya, 2013-05-28)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      [ANGLÈS] The study presents the migration of all communication networks by a company, from now on we will call ACME S.L. We will analyze the current network situation, the reasons for the change, we will gather the ...

    • 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)
      Comunicació de congrés
      Accés obert
      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)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      Projecte/Treball Final de Carrera
      Accés obert
      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
      Accés restringit per política de l'editorial
      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)
      Projecte/Treball Final de Carrera
      Accés obert
      [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)
      Projecte/Treball Final de Carrera
      Accés obert
      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
      Accés obert
      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 (Universitat Politècnica de Catalunya, 2013-01-14)
      Projecte Final de Màster Oficial
      Accés obert
      [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)
      Projecte/Treball Final de Carrera
      Accés obert
      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
      Accés obert
      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)
      Projecte/Treball Final de Carrera
      Accés obert
      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
      Accés obert
      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)
      Projecte Final de Màster Oficial
      Accés obert
      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 ...

    • RouteFlow: Migración al software defined networking 

      Sánchez Carrasco, Alejandro (Universitat Politècnica de Catalunya, 2016-06)
      Treball Final de Grau
      Accés obert
      This project seeks to highlight what is the Software Defined Networking and which components form it. After the subject knowledge has been exposed, an application based in in software defined networks called RouteFlow will ...