Ara es mostren els items 1-20 de 149

  • 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
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    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)
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    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 ...
  • 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)
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    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)
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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 ...
  • A framework for dynamic network architecture and topology optimization 

    Shafigh, Alireza Shams; Lorenzo, Beatriz; Glisic, Savo; Pérez Romero, Jordi; DaSilva, Luiz A.; MacKenzie, Allen B.; Röning, Juha (2016-04)
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    A new paradigm in wireless network access is presented and analyzed. In this concept, certain classes of wireless terminals can be turned temporarily into an access point (AP) anytime while connected to the Internet. This ...
  • 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)
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    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, ...
  • A novel autonomous RAT selection algorithm for non real time services 

    Pérez Romero, Jordi; Sallent Roig, José Oriol (2009)
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    This paper proposes a new solution for autonomous decision-making in the RAT selection process in multi-service multi-access network scenarios. It is based on exploiting the time dimension in the RAT selection, so that, ...
  • A novel framework for dynamic spectrum management in multiCell OFDMA networks based on reinforcement learning 

    Bernardo Álvarez, Francisco; Agustí Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, José Oriol (2010)
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    In this work the feasibility of Reinforcement Learning (RL) for Dynamic Spectrum Management (DSM) in the context of next generation multicell Orthogonal Frequency Division Multiple Access (OFDMA) networks is studied. ...
  • A novel spectrum selection strategy for matching multi-service secondary traffic to heterogeneous primary spectrum opportunities 

    Bouali, Faouzi; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (IEEE, 2011)
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    In order to increase spectrum utilization efficiency, CRs (Cognitive Radios) have been introduced to reuse white spaces left unused by legacy services under the strict constraint of not interfering them. In this context, ...
  • A real time emulator demonstrating advanced resource management solutions 

    Gelonch Bosch, Antonio José; Revés Ballesté, Xavier; Marojevic, Vuk; Nasreddine, Jad Nayef; Pérez Romero, Jordi; Sallent Roig, José Oriol (2010-07)
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  • A roadmap from UMTS optimization to LTE self-optimization 

    Sallent Roig, José Oriol; Pérez Romero, Jordi; Sánchez González, Juan; Agustí Comes, Ramon; Díaz Guerra, Miguel Angel; Henche, David; Paul, Daniel (2011-06)
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    Self-Organizing Networks (SON) are currently being introduced by the 3rd Generation Partnership Project (3GPP) as part of the Long Term Evolution (LTE) system as a key driver for improving the operation of wireless networks. ...
  • A robustness analysis of learning-based coexistence mechanisms for LTE-U operation in non-stationary conditions 

    Pérez Romero, Jordi; Sallent Roig, José Oriol; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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    The use of Long Term Evolution (LTE) in the unlicensed 5 GHz band, referred to as LTE-U, is a promising enhancement to increase the capacity of LTE networks and meet the requirements of future systems. This paper considers ...
  • A rule-based solution search methodology for self-optimization in cellular networks 

    Sánchez González, Juan; Pérez Romero, Jordi; Sallent Roig, José Oriol (2014-12-12)
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    This letter presents a rule-based solution search (RBSS) algorithm for self-optimization in a cellular network. It improves the solution search process of classical optimization methodologies by including a set of rules ...
  • A self-organized spectrum assignment strategy in next generation OFDMA networks providing secondary spectrum access 

    Bernardo Álvarez, Francisco; Agustí Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, José Oriol (2009)
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    This paper proposes a Self-organized Spectrum Assignment strategy in the context of next generation multicell Orthogonal Frequency Division Multiple Access networks. The proposed strategy is able to dynamically find ...
  • A simple algorithm to distribute optimally a number of external base stations in a microcellular environment 

    Agustí Comes, Ramon; Monfort, Xavier Querol; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 1998)
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    A simple algorithm is proposed for the optimal distribution of a number of base stations in a microcellular environment. Criteria are defined in order to decide the combinations of antennas that should be tested, and a ...
  • A solution framework to provide management services for wireless communications in the digital home 

    Ferrús Ferré, Ramón Antonio; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (2012-11)
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    The future digital home (DH) is envisioned as a place where a plethora of diverse personal and machine-to-machine communications will coexist to support different applications in areas such as information and ...
  • A Spectrum selection framework for opportunistic networks 

    Moessner, Klaus; Pérez Romero, Jordi; Sallent Roig, José Oriol; Bouali, Faouzi; Sarvanko, Heli; Mustonen, Miia; Matinmikko, Marja; Lee, Haeyoung; Vahid, Seiamak (IIMC International Information Management Corporation Ltd, 2012)
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    This paper presents a framework for including cognitive management functionalities in the spectrum selection process for Opportunistic Networks (ONs).The framework is based on a decision making functionality interacting ...