Now showing items 1-20 of 199

    • 5G framework for automated network adaptation in mission critical services 

      Jimeno, Elisa; Pérez Romero, Jordi; Vilà Muñoz, Irene; Blanco Jauregi, Begoña; Sanchoyerto, Aitor; Fernández, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Open Access
      Mission Critical Services (MCS) are gaining interest among network operators to offer alternative communications than conventional trunked radio systems. They promise a simplified management of cloud and radio resources ...
    • 5G-CLARITY: Integrating 5GNR, WiFi and LiFi in private networks with slicing support 

      Camps Mur, Daniel; Ghoraishi, Mir; Gutiérrez Terán, Jesús; Ordoñez-Lucena, Jose; Cogalan, Tezcan; Haas, Harald; García Gómez, Antonio; Sark, Vladica; Aumayr, Erik; van der Meer, Sven; Yan, Shuangyi; Mourad, Alain; Adamuz-Hinojosa, Oscar; Pérez Romero, Jordi; Granda Trigo, Miguel; Bian, Rui (European Conference on Networks and Communications (EuCNC), 2020)
      Conference lecture
      Open Access
      This paper introduces 5G-CLARITY, a 5G-PPP project exploring beyond 5G private networks integrating heterogeneous wireless access including 5GNR, WiFi, and LiFi. The project targets enhancements to current 5GNR performance ...
    • 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)
      Conference report
      Open Access
      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
      Open Access
      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 cloud-enabled small cell architecture in 5G networks for broadcast/multicast services 

      kourtis, Michail-Alexandros; Blanco, Begoña; Pérez Romero, Jordi; Makris, Dimitris; McGrath, Michael J.; Xilouris, George; Munaretto, Daniele; Solozabal, Ruben; Sanchoyerto, Aitor; Giannoulakis, Ioannis; Kafetzakis, Emmanouil; Riccobene, Vincenzo; Jimeno, Elisa; Kourtis, Anastasios; Ferrús Ferré, Ramón Antonio; Liberal, Fidel; Koumaras, Harilaos; Kostopoulos, Alexandros; Chochliouros, Ioannis (2019-06-01)
      Article
      Open Access
      The evolution of 5G suggests that communication networks become sufficiently flexible to handle a wide variety of network services from various domains. The virtualization of small cells as envisaged by 5G, allows enhanced ...
    • A cognitive management framework for spectrum selection 

      Bouali, Faouzi; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (2013-10-04)
      Article
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      Article
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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)
      Article
      Open Access
      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)
      Article
      Restricted access - publisher's policy
      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 new mode selection and resource reuse strategy for V2X in future cellular networks 

      Albonda, Haider Daami Resin; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      Recently, vehicle-to-vehicle (V2V) communications for future cellular systems have attracted considerable attention due to their potential benefits such as improved system capacity, spectral efficiency or delay reduction, ...
    • A new self-planning methodology based on signal quality and user traffic in Wi-Fi networks 

      Sánchez González, Juan; Pérez Romero, Jordi; Sallent Roig, José Oriol (Springer, 2019)
      Conference report
      Open Access
      Wi-Fi networks have become one of the most popular technologies for the provisioning of multimedia services. Due to the exponential increase in the number of Access Points (AP) in these networks, the automation of the ...
    • A novel autonomous RAT selection algorithm for non real time services 

      Pérez Romero, Jordi; Sallent Roig, José Oriol (2009)
      Conference report
      Open Access
      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)
      Conference report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      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 ...