Exploració per autor "Verikoukis, Christos"

Ara es mostren els items 45-64 de 154

    • Dealing with VoIP calls during ‘busy hour’ in LTE 

      Antonopoulos, Angelos; Kartsakli, Elli; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (INTECH, 2011)
      Capítol de llibre
      Accés obert

    • Delay analysis of converged medium transparent fixed service optical-wireless networks 

      Kalfas, George; Vardakas, John S.; Pleros, Nikos; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      We demonstrate for the first time an analytical model for computing the end to end packet delay of an Optical/Wireless 60GHz Radio-over-Fiber (RoF) network operating under the Medium-Transparent MAC (MT-MAC) protocol. The ...

    • Design and analysis of an energy-saving distributed MAC mechanism for wireless body sensor networks 

      Otal Ruiz, Begoña; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2010)
      Article
      Accés obert

    • Digital and physical layer network coding performance in the context of enforced fairness 

      Miliotis, Vasileios; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2014)
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      In this paper, we investigate the performance of the so-called Cross Network operating under diverse Network Coding (NC) techniques. We study the impact of Medium Access Control (MAC) layer fairness on the throughput ...

    • Distributed point coordination function for wireless ad hoc networks 

      Crespo, Cristian; Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2008)
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      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 energy efficient distance-aware base station switch on/off scheme for LTE-advanced 

      Kartsakli, Elli; Bousia, Alexandra; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2012)
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      Reducing the energy consumption in wireless networks has become a significant problem, not only because of its great impact on the global energy crisis, but also because it represents a noteworthy cost for telecommunication ...

    • Efficient power management based on a distributed queuing MAC for wireless sensor networks 

      Otal, B; Verikoukis, Christos; Alonso Zárate, Luis Gonzaga (Institute of Electrical and Electronics Engineers (IEEE), 2007)
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      Significant power is consumed at a sensor node when it either transmits a packet or when it receives a packet. In this paper, we study energy efficiency as a function of the number of sensors in the network and the payload ...

    • Energy and spectrum efficient user association in 5G heterogeneous networks 

      Mesodiakaki, Agapi; Adelantado Freixer, Ferran; Antonopoulos, Angelos; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      Due to the dense small cell deployment to cope with the increased data traffic of fifth generation (5G) networks, the direct backhaul (BH) connection of all small cells to the core network becomes challenging. To that end, ...

    • Energy and spectrum efficient user association in millimeter wave backhaul small cell networks 

      Mesodiakaki, Agapi; Adelantado Freixer, Ferran; Alonso Zárate, Luis Gonzaga; Di Renzo, Marco; Verikoukis, Christos (2017-02)
      Article
      Accés obert
      Macrocells are expected to be densely overlaid by small cells (SCs) to meet increasing capacity demands. Due to their dense deployment, some SCs will not be connected directly to the core network, and thus, they may forward ...

    • Energy efficiency analysis of a cooperative scheme for wireless local area networks 

      Predojev, Tatjana; Alonso Zárate, Jesús; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2012)
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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 efficiency analysis of secondary networks in cognitive radio systems 

      Mesodiakaki, Agapi; Adelantado Freixer, Ferran; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2013)
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      In this paper, we evaluate a novel contention-aware channel selection algorithm that focuses on energy efficiency improvement of a secondary network (SN) in a scenario where other non-cooperating SNs are also using the ...

    • Energy efficient base station maximization switch off scheme for LTE-advanced 

      Bousia, Alexandra; Kartsakli, Elli; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2012)
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      In this paper, we introduce a solution to a maximization problem for switching off Base Stations in an LTE-Advanced wireless network. Our scheme exploits the existence of idle periods in a cellular network during “night ...

    • Energy efficient proportionally fair uplink offloading for IP flow mobility 

      Miliotis, Vasileios; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2014)
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      The continuous increase of mobile data demand has led to mobile data offloading as a solution for the network congestion problem. The majority of the state-of-the-art is focused on the downlink offloading, while the change ...

    • Energy efficient techniques for 802.11n multiuser MAC WLANs 

      Gajic, Danica; Kartsakli, Elli; Zorba Barah, Nizar; Liß, Christian; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2013)
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      In this paper we evaluate the energy efficiency of MIMO technologies introduced in the emerging IEEE 802.11n standard for infrastructure based WLANs. The main focus is on exploiting multiuser capabilities of MIMO technologies, ...

    • Energy impact of outdoor small cell backhaul in green heterogeneous networks 

      Mesodiakaki, Agapi; Adelantado Freixer, Ferran; Antonopoulos, Angelos; Kartsakli, Elli; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2014)
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      Small cells (SCs) are expected to be densely deployed during the next few years to enhance the network capacity of future heterogeneous networks (HetNets). Due to their dense deployment, not all SCs are expected to have a ...

    • Energy sharing and trading in multi-operator heterogeneous network deployments 

      Oikonomakou, Maria; Antonopoulos, Angelos; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2019-05-01)
      Article
      Accés obert
      With a view to the expected increased data traffic volume and energy consumption of the fifth generation networks, the use of renewable energy (RE) sources and infrastructure sharing have been embraced as energy and ...

    • Energy-efficiency analysis of a distributed queuing medium access control protocol for biomedical wireless sensor networks in saturation conditions 

      Otal Ruiz, Begoña; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2011)
      Article
      Accés obert

    • 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)
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      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 ...

    • Energy-efficient contention-aware channel selection in cognitive radio Ad-Hoc networks 

      Mesodiakaki, Agapi; Adelantado, Ferran; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2012)
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      In this paper, we propose a novel contention-aware channel selection algorithm that focuses on throughput and energy efficiency improvement in Cognitive Radio Ad-Hoc Networks (CRAHNs). Specifically, we study the operation ...

    • Energy-efficient context-aware user association for outdoor small cell heterogeneous networks 

      Mesodiakaki, Agapi; Adelantado Freixer, Ferran; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (2014)
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      To meet the ever-increasing traffic demands, future cellular networks are about to include a plethora of small cells (SCs), with user equipments (UEs) being able of communicating via multiple bands. Given that SCs are ...