Ara es mostren els items 59-73 de 73

    • Robust association for multi-radio devices under coverage of multiple networks 

      Zola, Enrica Valeria; Dely, Peter; Kassler, Andreas; Barceló Arroyo, Francisco (Springer, 2013)
      Capítol de llibre / Comunicació de congrés
      Accés restringit per política de l'editorial
      Many devices are nowadays equipped with multiple wireless network interfaces such as GSM, HSPA+ and WLAN. This requires a mechanism for identifying which access network to use at a given time so to provide best user ...
    • Scalability of passive and active solutions for time-based ranging in IEEE 802.11 networks 

      Martín Escalona, Israel; Malpartida, Marta; Zola, Enrica Valeria; Barceló Arroyo, Francisco (Springer, 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Wireless positioning systems have become popular in recent years. Outdoor positioning has been addressed successfully, but location indoors still presents some open issues. One of them is related with the scalability of ...
    • Simulació de sistemes Trunking 

      Barceló Arroyo, Francisco; Navarro Ezquerra, Marta (Edicions UPC, 2001)
      Llibre
      Accés restringit a la comunitat UPC
      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 ...
    • SofTOA: software ranging for TOA-based positioning of WLAN terminals 

      Ciurana Adell, Marc; López Bueno, David; Barceló Arroyo, Francisco (Springer Verlag, 2009)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      TOA-based trilateration constitutes an interesting choice to locate terminals employing WLAN networks. A major limitation of this technique is the requirement for hardware modifications in the WLAN device in order to achieve ...
    • Software based measurement of round trip time observables for location in IEEE 802.11 networks 

      Martín Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Time-based multilateration in IEEE 802.11 networks usually involves custom hardware designs, which tend to slow down the implementation and deployment of the location system. This paper presents software for calculating ...
    • Software-based system for measuring location observables in IEEE 802.11 networks 

      Martín Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Several techniques have been proposed for positioning nodes over IEEE 802.11 networks, but only few consist in time-based multilateration, mainly due to the protocol stack not supporting accurate timestamps. One frequent ...
    • Statistical Modelling of Channel Occupancy in Trunked PAMR Systems 

      Jordán Parra, Javier; Barceló Arroyo, Francisco (Elsevier Science B.V., 1997-06)
      Article
      Accés restringit per política de l'editorial
      Public access mobile radio systems (PAMR) using trunking technology allow more efficient use of the frequency spectrum, as all the users of the system jointly use a common pool of channels. Trunked PAMR systems can operate ...
    • Statistical properties of silence gap in public mobile telephony channels with application to data transmission 

      Barceló Arroyo, Francisco (IEEE, 2001-06)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper examines the probability distribution of the channel idle time in mobile public telephony systems: personal communication systems (PCS) and private mobile radio (PMR). Results are used to predict the time available ...
    • Study of the results in a heterogeneous group for a course on computer networks 

      Barceló Arroyo, Francisco; Martín Escalona, Israel (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper shows statistics of a group at the Faculty of Telecommunications Engineering in Barcelona (Spain). Due to the different origin and academic background of the students, planning the course is a challenging ...
    • Study of the results in a heterogenous group for a course on computer networks 

      Barceló Arroyo, Francisco; Martín Escalona, Israel (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper shows statistics of a group at the Faculty of Telecommunications Engineering in Barcelona (Spain). Due to the different origin and academic background of the students, planning the course is a challenging task. ...
    • The introduction of a topic on accessibility in several engineering degrees 

      Martín Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria (IEEE, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Together with the trend towards engineering designs more accessible to handicapped people there is an increasing concern at the engineering faculties to include topics related to accessibility in their programs. Engineers ...
    • The M/D/C queue with priority: application to trunked mobile radio systems 

      Barceló Arroyo, Francisco; Casares Giner, Vicente; Paradells Aspas, Josep (IEE, 1996-08)
      Article
      Accés restringit per política de l'editorial
      A procedure is presented for estimating the mean waiting time in an M/D/C queue with two levels of nonpre-emptive priority. The approximation gives a maximum relative error of 10% for heavy load and is greater than the ...
    • Tráfico de telefonía móvil: caracterización e implicaciones del tiempo de ocupación del canal 

      Barceló Arroyo, Francisco (Universitat Politècnica de Catalunya, 1997-04-11)
      Tesi
      Accés obert
      En el capítulo 1 se presentan algunos conceptos básicos relacionados con el tráfico de voz, junto a los modelos más comúnmente utilizados en la evaluación y dimensionado de sistemas de telefonía móvil. En todos los casos ...
    • Validation of a traffic-based CAC method under general channel holding time 

      Vassileva Vesselinova, Natalia; Barceló Arroyo, Francisco (2009)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We validate a call admission control (CAC) method for mobile cellular networks under more restrictive conditions than those assumed in its design. The method uses distribution and the first and second moments of the ...
    • Wireless technology applied to GIS 

      Casademont Serra, Jordi; López Aguilera, M. Elena; Paradells Aspas, Josep; Rojas Espinosa, Alfonso; Calveras Augé, Anna M.; Barceló Arroyo, Francisco; Cotrina Navau, Josep (Elsevier, 2004-07)
      Article
      Accés restringit per política de l'editorial
      At present, there is a growing interest in wireless applications, due to the fact that the technology begins to support them at reasonable costs. In this paper, we present the technology currently available for use in ...