• Conference Object  

      4G converged environment: Modeling network selection as a game 

      Antoniou, Josephina; Pitsillides, Andreas (2007)
      Network Selection mechanism in 4G mobile networks is a newly introduced mechanism that handles the selection of the best network to satisfy a service request. Network Selection needs to take part prior to admission of the ...
    • Conference Object  

      Adaptive feedback algorithm for internet video streaming based on fuzzy rate control 

      Antoniou, Pavlos Ch.; Pitsillides, Andreas; Vassiliou, Vasos (2007)
      It is beyond any doubt that the unpredictable nature of the today's Internet has tremendous impact on the transmission of video streams. With respect to the real-time nature of video streaming, unpredictable band-width, ...
    • Conference Object  

      A brief overview of m-health e-emergency systems 

      Pattichis, Constantinos S.; Kyriacou, Efthyvoulos C.; Pattichis, Marios S.; Panayides, Andreas S.; Mougiakakou, Stavroula Gr; Pitsillides, Andreas; Schizas, Christos N. (2008)
      Rapid advances in wireless communications and networking technologies, linked with advances in computing and medical technologies facilitate the development and offering of emerging mobile systems and services in the ...
    • Conference Object  

      Combating persistent adversaries in wireless sensor networks using directional antennas 

      Stavrou, Eliana; Pitsillides, Andreas (2011)
      Security is an important property in applications offering services in mission-critical areas, such as in healthcare, military, transportation, etc. Wireless sensor networks (WSN) support the mission of these applications ...
    • Conference Object  

      An enhanced MBMS service provision approach for improved performance in UTRAN 

      Christophorou, C.; Pitsillides, Andreas (2011)
      As currently specified by 3GPP for UMTS, MBMS services are provided within a cell, either by P-t-P or by P-t-M transmission mode, but not both at the same time. Our previous work highlighted the inefficiencies that can ...
    • Conference Object  

      Further results on optimal signaling over secure MIMO channels 

      Loyka, S.; Charalambous, Charalambos D. (2013)
      Optimal signalling over the wire-tap MIMO Gaussian channel is studied under the total transmit power constraint. The recent results are extended in several directions, including a rank-deficient solution for the optimal ...
    • Conference Object  

      Handover control in MBMS enabled 3G mobile cellular networks 

      Christophorou, C.; Pitsillides, Andreas; Binucci, N. (2007)
      Handover Control in a cellular infrastructure aims to provide continuity of mobile services to a user traveling over cell boundaries. Using the existing Handover Control algorithm in 3rd Generation (3G) Mobile Cellular ...
    • Conference Object  

      HomeWeb: An application framework for Web-based smart homes 

      Kamilaris, Andreas; Trifa, V.; Pitsillides, Andreas (2011)
      Household appliances are being equipped with embedded micro-controllers and wireless transceivers, offering smart behavior. These augmented appliances form wireless networks and transform residential areas into smart homes. ...
    • Article  

      Improved coverage in WSNs by exploiting spatial correlation: the two sensor case 

      Michaelides, M.; Panayiotou, Christos G. (2011)
      Abstract One of the main applications of Wireless Sensor Networks (WSNs) is area monitoring. In such problems, it is desirable to maximize the area coverage. The main objective of this work is to investigate collaborative ...
    • Conference Object  

      The micropulse framework for adaptive waking windows in sensor networks 

      Zeinalipour-Yazdi, Constantinos D.; Andreou, Panayiotis G.; Chrysanthis, Panos K.; Samaras, George S.; Pitsillides, Andreas (2007)
      In this paper we present MicroPulse, a novel framework for adapting the waking window of a sensing device S based on the data workload incurred by a query Q. Assuming a typical tree-based aggregation scenario, the waking ...
    • Conference Object  

      MINT views: Materialized In-Network Top-k views in sensor networks 

      Zeinalipour-Yazdi, Constantinos D.; Andreou, Panayiotis G.; Chrysanthis, Panos K.; Samaras, George S. (2007)
      In this paper we introduce MINT (Materialized In-Network Top-k) Views, a novel framework for optimizing the execution of continuous monitoring queries in sensor networks. A typical materialized view V maintains the complete ...
    • Conference Object  

      Modeling context information for realizing simple mobile services 

      Broll, G.; Hußmann, H.; Prezerakos, G. N.; Kapitsaki, Georgia M.; Salsano, S. (2007)
      The emerging technology of mobile services is gaining on importance nowadays and various applications are being developed. Context-awareness constitutes an essential part of mobile services, as it can boost the provision ...
    • Conference Object  

      Nine months in the life of EGEE: A look from the South 

      Da Costa, G.; Dikaiakos, Marios D.; Orlando, S. (2007)
      Grids have emerged as wide-scale, distributed infrastructures providing enough resources for always more demanding scientific experiments. EGEE is one of the largest scientific Grids in production operation today, with ...
    • Conference Object  

      On optimal signaling over secure MIMO channels 

      Loyka, S.; Charalambous, Charalambos D. (2012)
      Optimal signalling over the wire-tap MIMO Gaussian channel is studied under the total transmit power constraint. A direct proof of the necessary condition of optimality (signaling on the positive directions of the difference ...
    • Conference Object  

      Optimal control of a two-wheeled mobile robot via finite capacity communication channel 

      Charalambous, Charalambos D.; Lambis, A.; Li, X. (2008)
      This paper presents specific hardware and components which can be used to implement optimal control strategies via wireless communication channels to achieve path tracking. The position of the robot at each time instant ...
    • Article  

      Probabilistic approaches to fault detection in networked discrete event systems 

      Athanasopoulou, E.; Hadjicostis, Christoforos N. (2005)
      In this paper, we consider distributed systems that can be modeled as finite state machines with known behavior under fault-free conditions, and we study the detection of a general class of faults that manifest themselves ...
    • Conference Object  

      Real-time web crawler detection 

      Balla, A.; Stassopoulou, Athena; Dikaiakos, Marios D. (2011)
      In this paper we present a methodology for detecting web crawlers in real time. We use decision trees to classify requests in real time, as originating from a crawler or human, while their session is ongoing. For this ...
    • Conference Object  

      Robust capacity for additive colored Gaussian uncertain channels 

      Charalambous, Charalambos D.; Denic, S. Z.; Djouadi, S. M. (2005)
      This paper is concerned with the definition and computation of channel capacity of continuous time additive Gaussian channels, when the channel is subject to uncertainty, the noise power spectral density is known and the ...
    • Conference Object  

      Service composition: State of the art and future challenges 

      Kapitsaki, Georgia M.; Kateros, D. A.; Foukarakis, I. E.; Prezerakos, G. N.; Kaklamani, Dimitra I.; Venieris, Iakovos St (2007)
      Service discovery and service composition constitute challenging tasks of service provisioning. Service composition is especially gaining on importance, as it can produce new composite services with features not present ...
    • Conference Object  

      Supervisory and notification aggregator service enabler in a fixed mobile convergent architecture 

      Konstantinides, C.; Charalambous, Charalambos D. (2007)
      This paper investigates and proposes the introduction of a Supervisory and Notification Aggregator (SNA) service enabler in a Fixed Mobile Convergent (FMC) architecture. The SNA service enabler facilitates the deployment ...