Now showing items 1-20 of 176

  • 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 ...
  • 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 ...
  • Admission control for multi-tenant radio access networks 

    Pérez Romero, Jordi; Sallent Roig, José Oriol; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (2017)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
    Open Access
    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
    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, ...
  • 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
    Open Access
    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
    Open Access
    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 analytical model for multi-tenant radio access networks supporting guaranteed bit rate services 

    Vilà Muñoz, Irene; Sallent Roig, José Oriol; Umbert Juliana, Anna; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2019-01-01)
    Article
    Open Access
    Network slicing is a key feature of forthcoming fifth generation (5G) systems to facilitate the partitioning of the network into multiple logical networks customized according to different business and application needs. ...
  • 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
    Open Access
    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 ...
  • An efficient mode selection for improving resource utilization in sidelink V2X cellular networks 

    Albonda, Haider Daami R.; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Sidelink (SL) communication underlying cellular networks is a new paradigm that has been proposed to enhance the performance of cellular networks and support vehicle-to-everything (V2X) communications that enable vehicles ...
  • An efficient RAN slicing strategy for a heterogeneous network with eMBB and V2X services 

    Resin Albonda, Haider D.; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2019-03)
    Article
    Open Access
    Emerging 5G wireless technology will support services and use cases with vastly heterogeneous requirements. Network slicing, which allows composing multiple dedicated logical networks with specific functionality running ...
  • An emulator framework for a new radio resource management for QoS guaranteed services in W-CDMA 

    Sallent Roig, José Oriol; Pérez Romero, Jordi; Casadevall Palacio, Fernando José; Agustí Comes, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-10)
    Article
    Open Access
    In the context of third-generation (3G) systems a mix of services with different requirements are expected. Consequently, packet scheduling mechanisms for quality of service (QoS) guarantees will play a key role. This paper ...