Now showing items 1-20 of 23

  • A cross-layer energy-saving mechanism for an enhancement of 802.11 WLAN systems 

    Begoña, Otal; Alonso Zárate, Luis Gonzaga (Institute of Electrical and Electronics Engineers (IEEE), 2004)
    Conference lecture
    Restricted access - publisher's policy
    Most multiple access collision avoidance-based (MAC) protocols for WLAN systems have been using fixed transmission power and have not considered energy-saving techniques targeted on channel estimation models. In order to ...
  • Anàlisi i optimització dels processos d’assignació de mostradors de facturació d’equipatges als aeroports 

    Fornés Martínez, Hèctor (Universitat Politècnica de Catalunya, 2012-06)
    Minor thesis
    Open Access
    [ANGLÈS] The check-in process is usually the first step that passengers do when they reach the airport, and thus, is the first impression that passengers get from their travel experience. Unfortunately, this step is ...
  • Análisis de la gestión del tráfico mediante velocidad variable y diseño de un algoritmo para la minimización de las colas 

    Calle Martínez, Víctor (Universitat Politècnica de Catalunya, 2011-10)
    Master thesis (pre-Bologna period)
    Open Access
    La movilidad es hoy en día uno de los principales problemas de las personas en la sociedad actual. Este problema se ve agravado en los accesos a las grandes ciudades, como Barcelona, donde predomina en gran medida el uso ...
  • Análisis de un mecanismo de ahorro de energía mediante lógica fuzzy para la mejora de sistemas WLAN 802.11 

    Otal, B; Alonso Zárate, Luis Gonzaga (Univ. Jaen, 2004)
    Conference lecture
    Restricted access - publisher's policy
    La mayoría de los protocolos de acceso al medio, los llamados protocolos MAC (Medium Access Control), para sistemas WLAN (Wireless Local Area Network), fijan una potencia de transmisión constante sin considerar técnicas ...
  • A new medium access protocol based on distributed queues for a CDMA environment 

    Alonso Zárate, Luis Gonzaga; Agustí Comes, Ramon; Sallent Roig, José Oriol (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Conference report
    Restricted access - publisher's policy
    This paper presents and analyses a new stable near-optimum random access protocol. The proposed access scheme is adapted for being used in a CDMA environment. It is based on distributed queues and a collision resolution ...
  • A novel MAC protocol for dynamic ad hoc wireless networks with dynamic self-configurable master-slave architecture 

    Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga (Suvisoft IEEE catalog number 04TH8754C, 2004)
    Conference lecture
    Restricted access - publisher's policy
    This paper proposes and analyses a novel MAC protocol for wireless ad hoc networks that makes use of distributed queues to achieve an efficient use of the radio channel. The protocol includes a dynamic self-configurable ...
  • Check-in counter allocation at Copenhagen Airport 

    Giménez Martínez, Ana (Universitat Politècnica de Catalunya / Denmarks Tekniske Universitet (Technical University of Denmark), 2011)
    Master thesis (pre-Bologna period)
    Open Access
    The purpose of this thesis is to develop a mathematical optimization model to assist the authorities of the airport of Copenhagen in allocating the different companies in the check-in counters. This model should assign ...
  • Discrete-time retrial queue with Bernoulli vacation, preemptive resume and feedback customers 

    Chen, Peishu; Zhou, Yongwu; Li, Changwen (OmniaScience, 2015-10)
    Article
    Open Access
    Purpose: We consider a discrete-time Geo/G/1 retrial queue where the retrial time follows a general distribution, the server subject to Bernoulli vacation policy and the customer has preemptive resume priority, Bernoulli ...
  • Diseño de una página web sobre teoría de colas 

    Garcia Linares, Eduardo (Universitat Politècnica de Catalunya, 2008-07)
    Master thesis (pre-Bologna period)
    Open Access
    El proyecto tiene como objetivo principal el estudio de las líneas o colas de espera para fomentar la enseñanza y el aprendizaje de la teoría de colas en un ámbito docente. El estudio se ha realizado para diferentes modelos ...
  • Distributed point coordination function for wireless ad hoc networks 

    Crespo, Cristian; Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2008)
    Conference report
    Restricted access - publisher's policy
    In this paper we describe a new MAC protocol for ad hoc networks called distributed point coordination function (DPCF). It constitutes an extension of the PCF of the IEEE 802.11 standard to operate over infrastructureless ...
  • Dynamic Buffer Size Allocation in Wireless Networks for Non-Elastic Traffic 

    Rumipamba Zambrano, Rubén Darío (Universitat Politècnica de Catalunya, 2014-01-08)
    Master thesis
    Open Access
    The dimensioning of the buffers in communication devices (routers and switches) is an important aspect to take into account since it affects some parameters of network performance such as: loss probability, end-to-end delay ...
  • Dynamic self-configurable master-slave architecture for AD HOC wireless networks with a distributed MAC scheme 

    Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga (Institute of Electrical and Electronics Engineers (IEEE), 2004)
    Conference lecture
    Restricted access - publisher's policy
    This paper proposes a distributed self-configurable architecture designed for wireless mobile ad hoc networks (MANET). In this kind of network, nodes move around varying constantly the topology of the network, so it is ...
  • Estudio de las colas de un multicines, optimización de los cuadrantes de personal 

    Moyano Muro, David (Universitat Politècnica de Catalunya, 2011-04)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    Con el fin de poder controlar las colas que se generan en los multicines, una empresa española necesita una herramienta que permita controlar las posibles anomalías que se produzcan a lo largo de los fines de semana en ...
  • Fairness enhancement in a self-configuring cluster-based wireless ad hoc network 

    Alonso Zárate, Jesús; Verikoukis, Christos; Alonso Zárate, Luis Gonzaga (Institute of Electrical and Electronics Engineers (IEEE), 2005)
    Conference lecture
    Restricted access - publisher's policy
    In this paper we analyze an unfairness problem arisen when implementing the self-configuring clusterbased DQCA AD HOC MAC protocol in a near-static topology. When there is a low relative mobility among terminals and ...
  • Flight and passenger delay assignment optimization strategies 

    Villardi de Montlaur, Adeline de; Delgado Muñoz, Luis (2017-08-01)
    Article
    Open Access
    This paper compares different optimization strategies for the minimization of flight and passenger delays at two levels: pre-tactical, with on-ground delay at origin, and tactical, with airborne delay close to the destination ...
  • Gestor de colas en salas de espera 

    Vera Aguilera, Iván (Universitat Politècnica de Catalunya, 2008)
    Master thesis (pre-Bologna period)
    Open Access
    Quants cops s’ha trobat que a la seva sala d’espera hi estava plena de gent i sense pràcticament lloc per a seure-hi? Quant de temps han estat esperant alguns pacients a la sala sense poder fer-hi res amb por de que l’hi ...
  • Investigation and optimization of a dry bulk terminal capacity using queuing theory. Application at the cement terminal in Barcelona Port. 

    Boixadé Cuadrat, Meritxell (Universitat Politècnica de Catalunya, 2018-09-17)
    Master thesis
    Open Access
    The capacity of a dry bulk terminal is in function of the number of berths and the daily productivity of the load/unloading systems. Complementary, the level of service of the terminal is characterized by a berth occupancy ...
  • Modeling and dimensioning of the resources in a delivery restaurant chain using queuing theory 

    Ontiveros López, Guillem (Universitat Politècnica de Catalunya, 2016-05-24)
    Bachelor thesis
    Open Access
    Covenantee:  Telemaki Tienda
    Using queuing theory, resources available at a delivery restaurant are studied and related wirh the quality of service
  • Multiuser MAC protocols for 802.11n wireless networks 

    Kartsakli, Elli; Zorba Barah, Nizar; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2009)
    Conference lecture
    Restricted access - publisher's policy
    The emerging 802.11n standard establishes the integration of MIMO technology in WLANs with the goal of achieving high data rates. However there are still many open issues regarding MAC protocol design for MIMO based systems, ...
  • Performance analysis of a distributed queuing MAC protocol for Ad-Hoc networks with different mobility conditions 

    Alonso Zárate, Jesús; Verikoukis, Christos; Alonso Zárate, Luis Gonzaga (King' s College London, 2005)
    Conference lecture
    Restricted access - publisher's policy
    This paper analyses the performance of the DQCA AD HOC MAC protocol for scenarios where the communication nodes have different mobility conditions, corresponding to different applications such as sensor networks, ...