Now showing items 21-40 of 47

    • Energy analysis of distributed neighbour discovery algorithms based on frame slotted-ALOHA for cooperative networks 

      Vázquez Gallego, Francisco; Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga (2012)
      Conference report
      Restricted access - publisher's policy
      The design of communications protocols that exploit the availability of both cellular and short-range radio access interfaces in a same terminal can be exploited to improve the energy efficiency of wireless communications ...
    • Energy and delay analysis of contention resolution mechanisms for machine-to-machine networks based on low-power WiFi 

      Vázquez Gallego, Francisco; Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga (2013)
      Conference report
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      Attaining very high energy efficiency is one of the big challenges to implement Machine-to-Machine (M2M) networks whose lifetime (without human intervention) must be measured in years. In this paper, we consider a synchronized ...
    • Energy efficiency analysis of a cooperative scheme for wireless local area networks 

      Predojev, Tatjana; Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2012)
      Conference report
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      The Persistent Relay Carrier Sensing Multiple Access (PRCSMA) Protocol has been proposed in the literature as a Medium Access Control (MAC) protocol suitable for Cooperative Automatic Retransmission Request (C-ARQ) schemes. ...
    • Energy harvesting-aware contention tree-based access for wireless machine-to-machine networks 

      Vázquez Gallego, Francisco; Alonso Zárate, Luis Gonzaga; Alonso Zárate, Jesús (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
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      The Energy Harvesting-aware Contention Treebased Access (EH-CTA) protocol is presented in this paper as a novel Medium Access Control (MAC) protocol for wireless Machine-to-Machine (M2M) networks where enddevices are ...
    • Energy-efficiency evaluation of a medium access control protocol for cooperative ARQ 

      Alonso Zárate, Jesús; Stavrou, Eirini; Stamou, Adamantia; Angelidis, Pantelis; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2011)
      Conference report
      Open Access
      We present in this paper the evaluation of the energy consumption of PRCSMA, an 802.11-based medium access control protocol designed to coordinate the retransmissions from the relays in a wireless network implementing a ...
    • Enhanced operation of DQMAN based wireless ad hoc networks 

      Alonso Zárate, Jesús; Kartsakli, Elli; Cateura, A; Verikoukis, Christos; Alonso Zárate, Luis Gonzaga (Institute of Electrical and Electronics Engineers (IEEE), 2007-10-01)
      Conference lecture
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      This paper presents two novel mechanisms aimed at improving the packet transmission delay distribution and the channel usage efficiency of wireless ad hoc networks when using the DQMAN (distributed queuing MAC protocol for ...
    • Estudio del rendimiento de protocolos de acceso para redes inalámbricas con antenas direccionales 

      Alonso Zárate, Jesús; Cateura, A; Kartsakli, Elli; Verikoukis, Christos; Alonso Zárate, Luis Gonzaga (Unión Científica Internacional de Radio, 2006-09-30)
      Conference lecture
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      The basic feature of the emerging high throughput IEEE 802.11n standard (and other standards) is the presence of directional antennas at network nodes. In this work, we evaluate the performance of media access control ...
    • Evaluación de algoritmos Cross-Layer para la optimización de sistemas de comunicaciones inalámbricas 

      Alonso Zárate, Jesús; Ramos, I.; Kartsakli, Elli; Verikoukis, Christos; Alonso Zárate, Luis Gonzaga (TELECOM I+D 2006, 2006-12-31)
      Conference lecture
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      En el presente trabajo se proponen siete diferentes técnicas cross-layer diseñadas para mejorar la eficiencia de redes inalámbricas ad hoc, operando con el protocolo de acceso al medio definido en el estándar 802.11. ...
    • Experimental performance evaluation of a MAC protocol for cooperative ARQ scenarios 

      Verikoukis, Christos; Pérez Neira, Ana Isabel; Alonso Zárate, Jesús; Skiannis, Ch. (2009)
      Conference report
      Open Access
      This paper provides details and performance evaluation of the implementation of the Persistent Relay Carrier Sensing Multiple Access (PRCSMA) protocol for Cooperative ARQ (C-ARQ) scenarios using off-the-shelf wireless ...
    • Extending the lifetime of M2M wireless networks through cooperation 

      Botter, Giuseppe; Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga; Granelli, Fabrizio; Verikoukis, Christos (2012)
      Conference report
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      In this paper we show how a cooperative Medium Access Control (MAC) protocol can help extend the lifetime of Machine to Machine (M2M) networks. A comparison between non-cooperative Automatic Repeat reQuest (ARQ) schemes ...
    • 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
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      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 ...
    • Goodbye, ALOHA! 

      Laya, Andrés; Kalalas, Charalampos; Vázquez Gallego, Francisco; Alonso Zárate, Luis Gonzaga; Alonso Zárate, Jesús (Institute of Electrical and Electronics Engineers (IEEE), 2016-04-21)
      Article
      Open Access
      The vision of the Internet of Things (IoT) to interconnect and Internet-connect everyday people, objects, and machines poses new challenges in the design of wireless communication networks. The design of medium access ...
    • Handoff functions for a distributed queuing collision avoidance medium access control protocol for wireless LANs 

      Alonso Zárate, Luis Gonzaga; Alonso Zárate, Jesús; Kartsakli, Elli; Antonopoulos, Angelos; Verikoukis, Christos (2009)
      Conference lecture
      Open Access
    • Improving the energy-efficiency of machine-to-machine communications with cooperative ARQ 

      Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2009)
      Conference report
      Restricted access - publisher's policy
      The energy-efficiency of Machine-to-Machine (M2M) communications can be improved by applying cooperation at the medium access control (MAC) layer. This means that machines can help each other to establish an energy-efficient ...
    • Multi-radio cooperative ARQ in wireless cellular networks: a MAC layer perspective 

      Alonso Zárate, Jesús; Kartsakli, Elli; Katz, Marcos; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2011-05)
      Article
      Open Access
      Multi-Radio Cooperative Automatic Retransmission Request (MCARQ) schemes are introduced in this paper within the context of hybrid networks which combine long-range and short-range communications. Since the number ...
    • Multi-radio cooperative retransmission scheme for reliable machine-to-machine multicast services 

      Laya Romero, Andrés Ernesto; Wang, Kun; Alonso Zárate, Luis Gonzaga; Alonso Zárate, Jesús (IEEE, 2012)
      Conference report
      Restricted access - publisher's policy
      Mobile Machine-to-Machine (M2M) market is expected to grow dramatically in the upcoming years; predictions agree that the majority of wireless traffic will correspond to this type of communication. M2M devices deployed in ...
    • On the impact of shadowing on the performance of cooperative medium access control protocols 

      Di Renzo, Marco; Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (IEEE, 2011)
      Conference report
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      Accurate representation of the physical layer is instrumental for a sound design and optimization of Medium Access Control (MAC) protocols for cooperative wireless networks. However, the vast majority of MAC protocols ...
    • Performance analysis of a cluster-based MAC protocol for wireless ad hoc networks 

      Alonso Zárate, Jesús; Kartsakli, Elli; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2010)
      Article
      Open Access
    • 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
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      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, ...
    • Performance analysis of IEEE 802.11 Ad hoc networks with cooperative ARQ in the presence of hidden and exposed terminals 

      Alonso Zárate, Luis Gonzaga; Kormentzas, Georgios; Alonso Zárate, Jesús; Verikoukis, Christos (2009)
      Conference lecture
      Open Access