Ara es mostren els items 1-20 de 165

  • A 4-Dimensional Markov model for the evaluation of radio access technology selection strategies in multiservice scenarios 

    Gelabert Doran, Xavier Bernardi; Pérez Romero, Jordi; Sallent Roig, José Oriol; Agustí Comes, Ramon (IEEE Press. Institute of Electrical and Electronics Engineers, 2006)
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    In order to support the conceptual development of Common Radio Resource Management (CRRM) algorithms, this paper provides an analytical approach to the performance evaluation of Radio Access Technology (RAT) selection ...
  • A belief-based decision-making framework for spectrum selection in cognitive radio networks 

    Pérez Romero, Jordi; Raschellà, Alessandro; Sallent Roig, José Oriol; Umbert Juliana, Anna (2015-12-17)
    Article
    Accés obert
    This paper presents a comprehensive cognitive management framework for spectrum selection in cognitive radio networks. The framework uses a belief vector concept as a means to predict the interference affecting the different ...
  • A cognitive management framework for spectrum selection 

    Bouali, Faouzi; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (2013-10-04)
    Article
    Accés restringit per política de l'editorial
    To increase cognitive radio (CR) operation efficiency, there has been an interest in enhancing the awareness level of spectrum utilization. In this context, this paper builds a new cognitive management functional architecture ...
  • A combined polling and ISMA-DS/CDMA protocol to provide QoS in packet mobile communications systems 

    Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, José Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2000)
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    This paper presents a new mechanism that combines the flexibility of an access protocol such as ISMA-DS/CDMA with the ability of a polling mechanism to provide a specific bound for the access delay. This protocol is proposed ...
  • A comparison of different optimisation search methodologies for self-optimisation in wireless cellular networks 

    Sánchez González, Juan; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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    Self-Organising Networks (SON) concept is seen as a way to reduce costs by automating functionalities such as network optimisation usually performed manually with extensive human work time. This paper provides a general ...
  • Adaptive algorithms for improving the throughput in an indoor mobile s-aloha ds-cdma system 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (DR. F-N PAVLIDOU IEEE, 1996)
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    This paper presents a novel Adaptive DSCDMA Slotted-ALOHA packet random access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving the throughput and message delay delivery when traffic ...
  • Adaptive S-ALOHA CDMA as an alternative way of integrating services in mobile environments 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-05)
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    Accés obert
    Code-division multiple-access (CDMA) schemes appear to be very promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility. This paper proposes an ...
  • Adaptive s-aloha cdma as an alternative way of integrating services in mobile environments 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (2000-05)
    Article
    Accés obert
    Code-division multiple-access (CDMA) schemes appear to be very promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility. This paper proposes an ...
  • Adaptive schemes for packet data in a ds-cdma environment 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
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    This paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme for improving the throughput of the conventional DS-CDMA slotted-ALOHA system. For this purpose a mobile-assisted algorithm is envisaged ...
  • Admission control for multi-tenant radio access networks 

    Pérez Romero, Jordi; Sallent Roig, José Oriol; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (2017)
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    Accés restringit per política de l'editorial
    The sharing of Radio Access Networks is gaining momentum in small cell scenarios, due to the associated reduction in capital and operational costs. In this scenario, the split of radio resources among tenants sharing the ...
  • Advanced spectrum management for the downlink of WCDMA systems using genetic algorithms 

    Nasreddine, Jad Nayef; Pérez Romero, Jordi; Sallent Roig, José Oriol (2009)
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    In this paper, we propose an advanced spectrum management approach for the downlink of WCDMA systems using genetic algorithms and the concept of coupling matrix, which is able to capture inter-cell interactions. Simulation ...
  • A fittingness factor-based spectrum management framework for cognitive radio networks 

    Bouali, Faouzi; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (2013-03)
    Article
    Accés restringit per política de l'editorial
    In order to increase cognitive radios (CRs) operation efficiency, there has been an increasing interest in strengthening awareness level about spectrum utilisation. In this respect, this paper proposes to exploit the ...
  • A framework based on a fittingness factor to enable efficient exploitation of spectrum opportunities in cognitive radio networks 

    Bouali, Faouzi; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (2011)
    Text en actes de congrés
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    In order to increase CRs (Cognitive Radios) operation efficiency, there has been an interest in increasing awareness level about spectrum utilisation. In this respect, this paper proposes a new fittingness factor concept ...
  • Alternativas de despliegue y asignación de espectro para las redes radio de emergencia de banda ancha 

    Cerrato, Javier Alonso; Ferrús Ferré, Ramón Antonio; Sallent Roig, José Oriol (2015-07-01)
    Article
    Accés obert
    La definición e implementación de una solución de banda ancha móvil que satisfaga las necesidades operativas de los cuerpos de seguridad pública y de emergencias (PPDR – Public Protection and Disaster Relief) es esencial ...
  • Alternativas en el desarrollo de aplicaciones para móviles 

    Valenzuela González, José Luis; Sallent Roig, José Oriol; Bodas, J; Fernández, Victor (ETSETB UPC, 2000)
    Text en actes de congrés
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    Cuando se alcanza la etapa de madurez del mercado GSM, como sería el caso de España, se impulsan nuevos servicios y aplicaciones para móviles, cuyo desarrollo puede fundamentarse en diversas tecnologías. En esta comunicación ...
  • A mobile controlled algorithm for improving the throughput in a s-aloha ds-cdma system 

    Sallent Roig, José Oriol; Agustí Comes, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 1996)
    Text en actes de congrés
    Accés obert
    This paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving the throughput and message delay delivery when traffic ...
  • A multi-cell multi-objective self-optimisation methodology based on genetic algorithms for wireless cellular networks 

    Sánchez González, Juan; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (2013-07)
    Article
    Accés restringit per política de l'editorial
    Self-organising networks (SON) are seen as one of the hottest topics in telecommunication network research and development, eagerly awaited by network operators to achieve a reduction in operational expenditures. However, ...
  • An adaptive ISMA-DS/CDMA MAC protocol for third-generation mobile communications systems 

    Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, José Oriol (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-11)
    Article
    Accés obert
    In this paper, an inhibit sense multiple access–direct sequence/code division multiple access (ISMA-DS/CDMA) medium access control protocol for a packet transmission mobile radio network is presented. The main feature ...
  • Analysis of a type II hybrid ARQ strategy in a DS-CDMA packet transmission environment 

    Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, José Oriol (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-08)
    Article
    Accés obert
    A type II hybrid automatic repeat request scheme is considered as a retransmission strategy in a direct-sequence code-division multiple-access packet mobile radio network. An analysis based on equilibrium point analysis ...
  • An application of reinforcement learning for efficient spectrum usage in next-generation mobile cellular networks 

    Bernardo Álvarez, Francisco; Agustí Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, José Oriol (2010-07)
    Article
    Accés obert
    This paper proposes reinforcement learning as a foundational stone of a framework for efficient spectrum usage in the context of nextgeneration mobile cellular networks. The objective of the framework is to efficiently use ...