Now showing items 21-40 of 172

  • Application of radio environment maps for dynamic broadband access in TV bands in urban areas 

    Kliks, Adrian; Kryszkiewicz, Pawel; Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José; Kulacz, Lukasz (Institute of Electrical and Electronics Engineers (IEEE), 2017-09-09)
    Article
    Open Access
    Spectrum sharing based on the dedicated databases, particularly in the context of TV band, is widely considered as a promising tool for better spectrum utilization in the future wireless networks. Practical realization of ...
  • 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)
    Article
    Restricted access - publisher's policy
  • 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)
    Article
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Artificial intelligence-based 5G network capacity planning and operation 

    Pérez Romero, Jordi; Sallent Roig, José Oriol; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Restricted access - publisher's policy
    The highly demanding requirements envisaged for future 5G networks together with the required support of new customers from vertical industries (e.g. e-health, automotive, energy) pose a big challenge for operators ...
  • 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)
    Article
    Restricted access - publisher's policy
    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)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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)
    Article
    Restricted access - publisher's policy
    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)
    Conference lecture
    Open Access
    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 ...
  • A testbed platform to demonstrate spectrum selection in opportunistic networks 

    Raschellà, Alessandro; Umbert Juliana, Anna; Pérez Romero, Jordi; Sallent Roig, José Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    This paper presents a testbed platform to demonstrate and validate spectrum opportunity identification and spectrum selection functionalities in Opportunistic Networks (ONs). The hardware component of the testbed is based ...
  • Automatic detection of sub-optimal performance in UMTS networks based on drive-test measurements 

    Sallent Roig, José Oriol; Pérez Romero, Jordi; Sánchez González, Juan; Agustí Comes, Ramon; Díaz Guerra, Miguel Angel; Henche, David; Paul, Daniel (2011)
    Conference lecture
    Restricted access - publisher's policy
    This paper presents a methodology for the automatic detection of sub-optimal performance in UMTS networks based on drive-test measurements. The proposed methodology can be seen as a first step towards the more ambitious ...
  • Autonomous functionalities for cognitive radio 

    Kalliojarvi, Kari; Acar, Guray; Patouni, Eleni; Stavroulaki, Vera; Pérez Romero, Jordi (2009)
    Conference lecture
    Open Access
    This paper provides an overview on the research activities in autonomous functionalities for cognitive radio and networks, carried out in FP7/E3-project. The identified main research areas within this topic include ...
  • Average block error probability in the reverse link of a packet ds/cdma system under rayleigh fading channel conditions 

    Pérez Romero, Jordi; Alonso Zárate, Luis Gonzaga; Agustí Comes, Ramon (2000-04)
    Article
    Open Access
    Analytic expressions have been derived for the probability density functions of the total signal-to-interference ratio when considering mixed-type interference sources in the reverse link of a DS/CDMA packet radio system ...
  • Average block error probability in the reverse link of a packet DS/CDMA system under Rayleigh fading channel conditions 

    Pérez Romero, Jordi; Alonso Zárate, Luis Gonzaga; Agustí Comes, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-04)
    Article
    Open Access
    Analytic expressions have been derived for the probability density functions of the total signal-to-interference ratio when considering mixed-type interference sources in the reverse link of a DS/CDMA packet radio system ...
  • Business scenarios, technical challenges and system requirements - D2.1 

    Ferrús Ferré, Ramón Antonio; Moreno, Oscar; Visiedo, David; Urdiales, Diego; Santiago, Miquel Angel; Gebert, Jens; Mouton, Christian; Lange, Christian; Merat, Vincent; Bender, Paul; Wich, Andreas; Agustí Comes, Ramon; Muck, Markus; Schmmidt, Andreas; Logothetis, Marios; Akezidou, Maria; Tzifa, Lia; Tsagkaris, Kostas; Stavroulaki, Vera; Demestichas, Panagiotis; Matinmikko, Marja; Mustonen, Miia; Sallent Roig, José Oriol; Pérez Romero, Jordi; Georgakopoulos, Andreas; Pecelj, Ilija; Boskovic, Dragan; Tosic, M.; Filo, Marcin; Piesiewicz, Radoslaw; Kritikou, Yiouli; Bantouna, Aimilia; Thomatos, Evangelos; Koutsouris, Nikos (2010-11)
    External research report
    Open Access
  • Capacity self-planning in small cell multi-tenant 5G networks 

    Muñoz, Pablo; Sallent Roig, José Oriol; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Restricted access - publisher's policy
    Multi-tenancy allows diverse agents sharing the infrastructure in the 5th generation of mobile networks. Such a feature calls for more automated and faster planning procedures in order to adapt the network capacity to the ...
  • Cognitive pilot channel: A radio enabler for spectrum awareness and optimized radio resource management 

    Sallent Roig, José Oriol; Pérez Romero, Jordi; Goria, Paolo; Buracchini, Enrico; Trogolo, Alessandro; Tsagkaris, Kostas; Demestichas, Panagiotis (2009)
    Conference report
    Open Access
    Today’s wireless communications landscape is characterized by the coexistence of a plethora of disparate radio access technologies (RATs), which exhibit varying features in terms of capacity and coverage capabilities, ...
  • Cognitive pilot channel enabling spectrum awareness 

    Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon; Cordier, Pascal (2009)
    Conference report
    Open Access
    This paper presents the Cognitive Pilot Channel (CPC) solution as a mechanism allowing the terminal to be aware of the communication means available at a given time and place in a flexible spectrum management scenario. The ...
  • Conceptual framework for enabling measurement-based mechanisms. Document number D5.1 

    Agustí Comes, Ramon; Akyildiz, Ian F.; Pérez Romero, Jordi; Sallent Roig, José Oriol; Bouali, Faouzi; Iacobelli, Lorenzo; Le Martret, Christophe; Grimoud, Sebastien; Ben Jemaa, Sana; Sayrac, Berna; Dimitriou, Nikos; Zalonis, Andreas; Polydoros, Andreas; Cai, Tao; Cao, Fengming; Mähönen, Petri; Riihijärvi, Janne (2011-02-28)
    External research report
    Restricted access - confidentiality agreement