Now showing items 1-20 of 45

    • A model for revocation forecasting in public-key infrastructures 

      Hernández Gañan, Carlos; Mata Diaz, Jorge; Muñoz Tapia, José Luis; Esparza Martín, Óscar; Alins Delgado, Juan José (2015-05-01)
      Article
      Open Access
      One of the hardest tasks of a certification infrastructure is to manage revocation. This process consists in collecting and making the revocation status of certificates available to users. Research on this topic has focused ...
    • A modeling of certificate revocation and its application to synthesis of revocation traces 

      Hernández Gañán, Carlos; Mata Diaz, Jorge; Muñoz Tapia, José Luis; Hernández Serrano, Juan; Esparza Martín, Óscar; Alins Delgado, Juan José (2012)
      Article
      Restricted access - publisher's policy
      One of the hardest tasks of a public key infrastructure (PKI) is to manage revocation. New communication paradigms push the revocation system to the limit and an accurate resource assessment is necessary before implementing ...
    • A simple closed-form approximation for the packet loss rate of a TCP connection over wireless links 

      Mata Diaz, Jorge; Alins Delgado, Juan José; Muñoz Tapia, José Luis; Esparza Martín, Óscar (2014-09-15)
      Article
      Open Access
      This letter presents a new and simple model for a TCP flow experiencing random packet losses due to both transmission errors and congestion events. From this model, we will derive a straightforward expression of a unified ...
    • Adaptive packet scheduling for the support of QoS over DVB-S2 satellite systems 

      Rendón Morales, Elizabeth; Mata Diaz, Jorge; Alins Delgado, Juan José; Muñoz Tapia, José Luis; Esparza Martín, Óscar (Springer Verlag, 2011)
      Conference report
      Restricted access - publisher's policy
      This paper presents an adaptive algorithm for managing the weights of a weighted round robin (WRR) scheduler. The weights calculation depends on the capacity variations present in a Digital Video Broadcasting-Second ...
    • Analysis of TCP variants over a QoS DVB-S2 system 

      Rendón Morales, Elizabeth; Mata Diaz, Jorge; Alins Delgado, Juan José; Muñoz Tapia, José Luis; Esparza Martín, Óscar (ACM Press. Association for Computing Machinery, 2011)
      Conference report
      Restricted access - publisher's policy
      This paper presents a performance analysis of the TCP protocol considering the DiffServ architecture to provide Quality of Service guarantees working over a Digital Video Broadcasting - Second Generation (DVB-S2) satellite ...
    • Analysis of video streaming performance in vehicular networks 

      Reñé, Sergi; Gañan, Carlos; Caubet Fernández, Juan; Alins Delgado, Juan José; Mata Diaz, Jorge; Muñoz Tapia, José Luis (2011)
      Conference report
      Restricted access - publisher's policy
      Vehicular Ad-hoc Networks (VANETs) have been mainly motivated for safety applications, but non-safety applications can also be very helpful to impulse vehicular networks. Among non-safety applications, video streaming ...
    • ARQUITECTURA DE XARXES DE COMUNICACIÓ (1r quadrimestre, 2n parcia) 

      Alins Delgado, Juan José (Universitat Politècnica de Catalunya, 2011-01-26)
      Exam
      Restricted access to the UPC academic community
    • COACH: COllaborative certificate stAtus CHecking mechanism for VANETs 

      Hernández Gañán, Carlos; Muñoz Tapia, José Luis; Esparza Martín, Óscar; Mata Diaz, Jorge; Hernández Serrano, Juan; Alins Delgado, Juan José (2011-11-01)
      Article
      Restricted access - publisher's policy
      Vehicular Ad Hoc Networks (VANETs) require mechanisms to authenticate messages, identify valid vehicles, and remove misbehaving vehicles. A public key infrastructure (PKI) can be used to provide these functionalities using ...
    • Contribución a la transmisión de vídeo en redes IP con calidad de servicio 

      Alins Delgado, Juan José (Universitat Politècnica de Catalunya, 2004-09-17)
      Doctoral thesis
      Open Access
      Hoy en día, entre los servicios más solicitados por los usuarios en las redes de comunicaciones, se encuentran aquellos que incorporan información multimedia. En Internet, es habitual que un gran número de páginas web ...
    • Cross-layer packet scheduler for QoS support over digital video broadcasting-second generation broadband satellite systems 

      Rendón Morales, Elizabeth; Mata Diaz, Jorge; Alins Delgado, Juan José; Muñoz Tapia, José Luis; Esparza Martín, Óscar (2014-10-01)
      Article
      Restricted access - publisher's policy
      This article presents a cross-layer packet scheduler to provide end-to-end QoS guarantees for Digital Video Broadcasting-Second Generation (DVB-S2) broadband satellite systems. The scheduler design is based on a cross-layer ...
    • EPA: An efficient and privacy-aware revocation mechanism for vehicular ad hoc networks 

      Hernández Gañan, Carlos; Muñoz Tapia, José Luis; Esparza Martín, Óscar; Mata Diaz, Jorge; Alins Delgado, Juan José (Elsevier, 2015-08-01)
      Article
      Open Access
      Security is vital for the reliable operation of vehicular ad hoc networks (VANETs). One of the critical security issues is the revocation of misbehaving vehicles. While essential, revocation checking can leak private ...
    • Evaluation of cryptographic capabilities for the Android platform 

      Gonzalez Peon, David; Esparza Martín, Óscar; Muñoz Tapia, José Luis; Alins Delgado, Juan José; Mata Diaz, Jorge (Springer, 2015)
      Conference report
      Restricted access - publisher's policy
      Future networks will be formed by millions of devices, many of them mobile, sharing information and running applications. Android is currently the most widely used operating system in smartphones, and it is becoming more ...
    • FONAMENTS DE XARXES TELEMÀTIQUES (Examen 2n quadrimestre, 1r parcial) 

      Alins Delgado, Juan José (Universitat Politècnica de Catalunya, 2011-04-13)
      Exam
      Restricted access to the UPC academic community
    • Impact of the revocation service in PKI prices 

      Hernández Gañán, Carlos; Muñoz Tapia, José Luis; Esparza Martín, Óscar; Mata Diaz, Jorge; Alins Delgado, Juan José (2012)
      Conference report
      Restricted access - publisher's policy
      The ability to communicate securely is needed for many network applications. Public key infrastructure (PKI) is the most extended solution to verify and confirm the identity of each party involved in any secure transaction ...
    • Impacto de las unidades a pie de carretera en las interferencias en redes vehiculares 

      Hernández Gañán, Carlos; Reñé Vicente, Sergi; Mata Diaz, Jorge; Alins Delgado, Juan José (2013)
      Conference report
      Restricted access - publisher's policy
      Las redes ad hoc vehiculares (VANETs) han emergido como una tecnolog´ıa clave que posibilita el despliegue diversas aplicaciones. Proporcionar seguridad a los servicios de informaci´on y entretenimiento en estos entornos ...
    • Implementacion de Ipsec en una arquitectura TCP splitting 

      Caubet Fernández, Juan; Muñoz Tapia, José Luis; Alins Delgado, Juan José; Mata Diaz, Jorge; Esparza Martín, Óscar (2010)
      Conference report
      Open Access
      El rendimiento de las aplicaciones que utilizan el protocolo de transporte TCP (Transmission Control Protocol) sobre enlaces vía satélite tiene una degradación significativa. Esto se debe principalmente a que el algoritmo ...
    • MHT-based mechanism for certificate revocation in VANETs 

      Muñoz Tapia, José Luis; Esparza Martín, Óscar; Hernández Gañán, Carlos; Mata Diaz, Jorge; Alins Delgado, Juan José; Ganchev, Ivan (Springer, 2014-07)
      Part of book or chapter of book
      Restricted access - publisher's policy
      Vehicular Ad Hoc Networks (VANETs) require mechanisms to authenticate messages, identify valid vehicles, and remove misbehaving vehicles. A Public Key Infrastructure (PKI) can be utilized to provide these functionalities ...
    • Multipath TCP architecture for infotainment multimedia applications in vehicular networks 

      Reñé, Sergi; EXPOSITO, ERNESTO; Gineste, Mathieu Gineste; Alins Delgado, Juan José; Esparza Martín, Óscar (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Restricted access - publisher's policy
      The large deployment of Internet resources has facilitated the accelerated development of Intelligent Transport Systems (ITS) including a large diversity of distributed applications such as non-safety infotainment vehicular ...
    • Navegar seguro por Internet 

      Pegueroles Vallés, Josep Rafel; Alins Delgado, Juan José (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2000)
      Article
      Open Access
    • NeuroCast: adaptive multi-source P2P video streaming application for wireless networks 

      Gañan, Carlos; Caubet Fernández, Juan; Mata Diaz, Jorge; Alins Delgado, Juan José; Esparza Martín, Óscar (2011)
      Conference report
      Restricted access - publisher's policy
      Streaming consists in distributing media to large audiences over a computer network. Providing a streaming service for wireless mobile nodes presents many challenges. A peer-to-peer (P2P) solution has the big advantage of ...