Browsing by Subject "Telecommunication networks"

Now showing items 1-20 of 50

    • Conference Object  

      Adaptive connection admission and flow control: quality of service with high utilisation 

      Pitsillides, Andreas; Lambert, Jim (IEEE, 1994)
      In this paper, we use adaptive feedback and adaptive feedforward control methodologies to avoid congestion at high server utilisation. This addresses the combined connection admission and flow control problem (generic ...
    • Article  

      Adaptive network-aided session support in context-aware converged mobile networks 

      Antoniou, Josephina; Christophorou, C.; Simoes, J.; Pitsillides, Andreas (2012)
      The increase of networking complexity requires the design of new performance optimisation schemes for delivering sessions to users under different conditions. This paper addresses context-aware, adaptive multiparty sessions ...
    • Conference Object  

      Algorithmic mechanisms for internet supercomputing under unreliable communication 

      Christoforou, Evgenia; Fernández Anta, Antonio; Georgiou, Chryssis; Mosteiro, Miguel A. (2011)
      This work, using a game-theoretic approach, considers Internet-based computations, where a master processor assigns, over the Internet, a computational task to a set of untrusted worker processors, and collects their ...
    • Article  

      Approximate Equilibria and Ball Fusion 

      Koutsoupias, Elias; Mavronicolas, Marios; Spirakis, Paul G. (2003)
      We consider selfish routing over a network consisting of m parallel links through which n selfish users route their traffic trying to minimize their own expected latency. We study the class of mixed strategies in which the ...
    • Conference Object  

      Bilateral routing in emergency response networks 

      Kolios, Panayiotis; Pitsillides, Andreas; Mokryn, O. (IEEE Computer Society, 2013)
      An emergency response networking scenario is considered, in which immediately after the strike of a disaster, mobile terminals autonomously form an ad-hoc network. Distress nodes, use this network to disseminate help-requests ...
    • Article  

      Blocking reduction for distributed transaction processing within MANETs 

      Obermeier, S.; Böttcher, S.; Hett, M.; Chrysanthis, Panos K.; Samaras, George S. (2009)
      Atomic commit protocols for distributed transactions in mobile ad-hoc networks have to consider message delays and network failures. We consider ad-hoc network scenarios, in which participants hold embedded databases and ...
    • Article  

      Brief announcement: Algorithmic mechanisms for internet-based computing under unreliable communication 

      Christoforou, Evgenia; Fernández Anta, Antonio; Georgiou, Chryssis; Mosteiro, Miguel A. (2011)
      This work, using a game-theoretic approach, considers Internet-based computations, where a master processor assigns, over the Internet, a computational task to a set of untrusted worker processors, and collects their ...
    • Conference Object  

      A broadband 1:4 Series power divider using metamaterial phase-shifting lines 

      Antoniades, Marcos A.; Eleftheriades, G. V. (2005)
      A metamaterial 1:4 series power divider that provides equal power split to all four output ports over a large bandwidth Is presented. The divider comprises four non-radiating metamaterial lines In series that can each Incur ...
    • Conference Object  

      A catalog of ∃ℝ-complete decision problems about Nash equilibria in multi-player games 

      Bilò, Vittorio; Mavronicolas, Marios (Schloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing, 2016)
      [Schaefer and Štefankovic, Theory of Computing Systems, 2015] provided an explicit formulation of ∃ℝ as the class capturing the complexity of deciding the Existential Theory of the Reals, and established that deciding, ...
    • Article  

      A comparative study of protocols for efficient data propagation in smart dust networks 

      Chatzigiannakis, Ioannis; Dimitriou, Tassos D.; Mavronicolas, Marios; Nikoletseas, Sotiris E.; Spirakis, Paul G. (2003)
      Smart Dust is comprised of a vast number of ultra-small fully autonomous computing and communication devices, with very restricted energy and computing capabilities, that co-operate to accomplish a large sensing task. Smart ...
    • Article  

      Complexity of rational and irrational Nash equilibria 

      Bilò, Vittorio; Mavronicolas, Marios (2011)
      We introduce two new decision problems, denoted as ∃ RATIONAL NASH and ∃ IRRATIONAL NASH, pertinent to the rationality and irrationality, respectively, of Nash equilibria for (finite) strategic games. These problems ask, ...
    • Article  

      Complexity of rational and irrational nash equilibria 

      Bilò, Vittorio; Mavronicolas, Marios (2014)
      We introduce two new natural decision problems, denoted as ∃ RATIONAL NASH and ∃ IRRATIONAL NASH, pertinent to the rationality and irrationality, respectively, of Nash equilibria for (finite) strategic games. These problems ...
    • Article  

      Computing Nash equilibria for scheduling on restricted parallel links 

      Gairing, M.; Lücking, T.; Mavronicolas, Marios; Monien, Burkhard (2010)
      We consider the problem of routing nusers on m parallel links under the restriction that each user may only be routed on a link from a certain set of allowed links for the user. So, this problem is equivalent to the ...
    • Conference Object  

      A congestion control algorithm for max-min resource allocation and bounded queue sizes 

      Lestas, Marios; Ioannou, Petros A.; Pitsillides, Andreas (2004)
      This paper deals with the congestion control problem in computer networks which is viewed as a resource allocation problem constrained by the additional requirement that the queue sizes need to be bounded. We propose a ...
    • Article  

      Congestion control in differentiated services networks using Fuzzy-RED 

      Chrysostomou, Chrysostomos; Pitsillides, Andreas; Rossides, Loukas; Polycarpou, Marios M.; Sekercioglu, Y. Ahmet (2003)
      Network congestion control remains a critical and high priority issue. The rapid growth of the Internet and increased demand to use the Internet for time-sensitive voice and video applications necessitate the design and ...
    • Article  

      Cost sharing mechanisms for fair pricing of resource usage 

      Mavronicolas, Marios; Panagopoulou, P. N.; Spirakis, Paul G. (2008)
      We propose a simple and intuitive cost mechanism which assigns costs for the competitive usage of m resources by n selfish agents. Each agent has an individual demand
    • Conference Object  

      The Dynamics of Vehicular Networks in Large-Scale Urban Environments 

      Loulloudes, Nicholas; Pallis, George C.; Dikaiakos, Marios D. (Institute of Electrical and Electronics Engineers Inc., 2016)
      Vehicular Ad hoc Networks (VANETs) have emerged as a platform to support Intelligent Transportation Applications. A key to the development of protocols and services for IVC lies in the knowledge of the topological ...
    • Article  

      Editorial for special issue Internet-based Content Delivery 

      Fortino, G.; Mastroianni, C.; Pallis, George C.; Pathan, M.; Vakali, Athena I. (2011)
      The main technical underpinnings of Cloud Computing infrastructures and services include virtualization, service-orientation, elasticity, multi-tenancy, power efficiency, and economics of scale. The perceived advantages ...
    • Conference Object  

      An efficient handover algorithm for MBMS enabled 3G mobile cellular networks 

      Christophorou, C.; Pitsillides, Andreas (2006)
      With the introduction of Multimedia Broadcast Multicast Service (MBMS) in 3rd Generation (3G) Networks, the Radio Network Controller (RNC) for radio efficiency reasons can use either Dedicated or Common resources to ...
    • Conference Object  

      Efficient online state tracking using sensor networks 

      Halkidi, Maria; Kalogeraki, Vana; Gunopulos, Dimitrios; Papadopoulos, Dimitris; Zeinalipour-Yazdi, Constantinos D.; Vlachos, Michail (2006)
      Sensor networks are being deployed for tracking events of interest in many environmental or monitoring applications. Because of their distributed nature of operation, a challenging issue is how to accurately identify the ...