Browsing by Subject "Mobile communication systems"

Now showing items 1-20 of 683

    • 1Gbps full-duplex links for ultra-dense-WDM 6.25GHz frequency slots in optical metro-access networks 

      Altabas, Jose Antonio; Izquierdo, David; Lázaro Villa, José Antonio; Lerin, Adolfo; Sotelo, Félix; Garces, Ignacio (2016-01-11)
      Article
      Open Access
      1Gbps full-duplex optical links for 6.25GHz ultra dense WDM frequency slots are demonstrated and optimized for cost-effective metro-access networks. The OLT-ONU downlinks are based on 1Gbps Nyquist-DPSK using MZM and ...

    • 3G access network dimensioning in isolated rural areas based on femtocells 

      Olmo Alòs, Jaume del; Pascual Iserte, Antonio; Vidal Manzano, José; Muñoz Medina, Olga; Agustín de Dios, Adrián (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      Based on the definition of the access network architecture and the forecast of voice and data traffic evolution, this paper derives engineering rules for radio network dimensioning of 3G femtocell-based access networks in ...

    • 3MRP+: an improved multimetric geographical routing protocol for VANETs 

      Lemus Cárdenas, Leticia; Mezher, Ahmad Mohamad; López Márquez, Nely Patricia; Barbecho Bautista, Pablo Andrés; Cárdenas Barrera, Julián; Aguilar Igartua, Mónica (Association for Computing Machinery (ACM), 2018)
      Conference report
      Restricted access - publisher's policy
      The design of routing protocols in vehicular ad hoc networks (VANETs) is fundamental to achieve a high packets’ delivery ratio. Routing protocols whose operation considers the nodes’ positions use updated routing information ...

    • 5G connected vehicles supported by optical fiber access 

      Lázaro Villa, José Antonio; Coves Garrido, Massiel; Sarmiento Hernández, Samael; Altabas, Jose Antonio; Lerin, Adolfo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      Future autonomous vehicle will require a high level of computation, communication, sensing and fast response actuation. Communication among vehicles, and vehicles to infrastructure, accessing to remote systems and services ...

    • 5G for the support of public safety services 

      Chochliouros, Ioannis; Spiliopoulou, Anastasia S.; Lazaridis, Pavlos I.; Zaharis, Zaharias D.; Spada, Maria Rita; Pérez Romero, Jordi; Blanco Jauregi, Begoña; Khalife, Hicham; Khaleghi, Ehsan Ebrahimi; Kourtis, Michail-Alexandros (2021-05-20)
      Article
      Open Access
      Next-generation mobile technologies are the enablers for meeting the variable specific requirements of the public safety (PS) community. In particular, due to the development of commercially deployed 5G networks, PS providers ...

    • 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 NR small cells deployment using Beamforming 

      Vinyes Marco, Nuria (Universitat Politècnica de Catalunya, 2022-05-24)
      Master thesis
      Open Access
      Covenantee:   Forsk
      5G mobile communication systems should bring significant benefits such as lower latency, higher peak and user data rates, connection density and availability. To achieve such benefits beamforming at the base stations and ...

    • 5G transport network blueprint and dimensioning for a dense urban scenario 

      Demirkol, Ilker Seyfettin; Camps Mur, Daniel; Bartelt, Jens; Zou, Jim (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      In this paper, we provide a quantitative evaluation of the deployment aspects and dimensioning of the 5G transport architecture in a representative European city. In particular, we select an example dense urban city scenario ...

    • 5G transport network requirements for the next generation fronthaul interface 

      Bartelt, Jens; Vucic, Nikola; Camps Mur, Daniel; García Villegas, Eduard; Demirkol, Ilker Seyfettin; Fehske, Albrecht; Grieger, Michael; Tzanakaki, Anna; Gutiérrez Terán, Jesús; Grass, Eckhard; Lyberopoulos, George; Fettweis, Gerhard (2017-05-15)
      Article
      Open Access
      To meet the requirements of 5G mobile networks, several radio access technologies, such as millimeter wave communications and massive MIMO, are being proposed. In addition, cloud radio access network (C-RAN) architectures ...

    • 5G-XHaul: a converged optical and wireless solution for 5G transport networks 

      Gutiérrez Terán, Jesús; Maletic, Nebojsa; Camps Mur, Daniel; García Villegas, Eduard; Berberana, Ignacio; Anastasopoulos, Markos; Tzanakaki, Anna; Kalokidou, Vaia; Flegkas, Paris; Syrivelis, Dimitris; Korakis, Thanasis; Legg, Peter; Markovic, Dusan; Limperopoulos, George; Bartelt, Jens; Chaudhary, Jay Kant; Grieger, Michael; Vucic, Nikola; Zou, Jim; Grass, Eckhard (Wiley-Blackwell, 2016-07-08)
      Article
      Open Access
      The common European Information and Communications Technology sector vision for 5G is that it should leverage on the strengths of both optical and wireless technologies. In the 5G context, a wide spectra of radio access ...

    • 5GCroCo Barcelona trial site for cross-border anticipated cooperative collision avoidance 

      Vazquez-Gallego, Francisco; Casellas Gordillo, Rosa Maria; Vilalta Cañellas, Ricard; Sedar, Mohottige Roshan Madhusanka; Alemany Prats, Pol; Martínez Sevillano, Rubén; Alonso Zárate, Jesús; Moscatelli, Francesca; Guilhot, Denis; Echarri, José Miguel; Dizambourg, Laurent (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Restricted access - publisher's policy
      Cooperative, connected and automated mobility (CCAM) services along different countries require cross-border solutions to support seamless delivery of services in a multioperator, multi-telco-vendor, and multi-car-manufacturer ...

    • A 3D printed lens antenna for 5G applications 

      Ballesteros, Christian; Maestre, Marcos; Santos Blanco, M. Concepción; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Open Access
      A switchable multi-antenna architecture for lens-assisted beamsteering in the Ka-band region allocated for 5G communications (24-30 GHz) is proposed. The radiating elements are bow-tie antennas mounted with a 3D printed ...

    • A Beacon-assisted direction-aware scanning scheme for 802.11-based discovery in Fog-to-Cloud systems 

      Rejiba, Zeineb; Masip Bruin, Xavier; Marín Tordera, Eva (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference report
      Restricted access - publisher's policy
      In order to fully leverage idle computational resources in a fog computing scenario, a suitable discovery mechanism is needed. Within this context, F2C-Aware has been proposed in a previous work as a discovery solution ...

    • A communication infrastructure to ease the development of mobile collaborative applications 

      Rodríguez-Covili, Juan Francisco; Ochoa, Sergio; Pino, José; Meseguer Pallarès, Roc; Medina Medina, Esunly; Royo Vallés, María Dolores (2011)
      Article
      Restricted access - publisher's policy
      Mobile workers doing loosely coupled activities typically perform on demand collaboration in the physical workplace. Communication services available in such work scenarios are uncertain, therefore mobile collaborative ...

    • A comparison of different optimisation search methodologies for self-optimisation in wireless cellular networks 

      Sánchez González, Juan; Sallent Roig, 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 distributed man-machine dispatching architecture for emergency operations based on 3GPP mission critical services 

      Viamonte Solé, David; Calveras Augé, Anna M. (Institute of Electrical and Electronics Engineers (IEEE), 2017-12-16)
      Article
      Open Access
      With the number of non-human devices expected to significantly overtake human users of LTE networks, it is no surprise that First Responders in Mission Critical operations will need to interact with an increasing number ...

    • A framework for multidimensional modelling of spectrum occupancy in the simulation of cognitive radio systems 

      López Benitez, Miguel; Casadevall Palacio, Fernando José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      Spectrum models play a key role in the research of Dynamic Spectrum Access/Cognitive Radio (DSA/CR) systems. Models existing to date are able to characterise the statistical properties of spectrum occupancy in only one ...

    • A framework for the joint placement of edge service infrastructure and User Plane Functions for 5G 

      Leyva Pupo, Irian; Santoyo González, Alejandro; Cervelló Pastor, Cristina (Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-14)
      Article
      Open Access
      Achieving less than 1 ms end-to-end communication latency, required for certain 5G services and use cases, is imposing severe technical challenges for the deployment of next-generation networks. To achieve such an ambitious ...

    • A fuzzy logic filter for coherent detection in mobile communication receivers 

      Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A.; Jové, A; Artés, A (1998)
      Conference report
      Open Access
      This paper proposes and demonstrates the use of a fuzzy logic filter for carrier phase synchronization in digital mobile communication receivers. The use of a priori knowledge of the dynamics of the phase in mobile fading ...

    • A fuzzy-based data replication system for QoS improvement in MANETs 

      Barolli, Leonard; Spaho, Evjola; Ikeda, Makoto; Kulla, E.; Xhafa Xhafa, Fatos; Youna, Muhammad (ACM Press, NY, 2012)
      Conference report
      Restricted access - publisher's policy