• Approximation caching and routing algorithms for massive mobile data delivery 

      Poularakis, K.; Iosifidis, G.; Tassiulas, L. (2013)
      Small cells constitute a promising solution for managing the mobile data growth that has overwhelmed network operators. Local caching of popular content items at the small cell base stations has been proposed in order to ...
    • Asymptotic laws for content replication and delivery in wireless networks 

      Gitzenis, S.; Paschos, G. S.; Tassiulas, L. (2012)
      A key consideration in novel communication paradigms in multihop wireless networks regards the scalability of the network. We investigate the case of nodes making random requests on content stored in multiple replicas over ...
    • Determinative Brain Storm Optimization 

      Sovatzidi G., Iakovidis D.K. (2020)
      Brain Storm Optimization (BSO) is a swarm intelligence optimization algorithm, based on the human brainstorming process. The ideas of a brainstorming process comprise the solutions of the algorithm, which iteratively applies ...
    • Exploiting user mobility for wireless content delivery 

      Poularakis, K.; Tassiulas, L. (2013)
      We consider the problem of storing segments of encoded versions of content files in a set of base stations located in a communication cell. These base stations work in conjunction with the main base station of the cell. ...
    • A hybrid approach to frequent itemset hiding 

      Gkoulalas-Divanis, A.; Verykios, V. S. (2007)
      In this paper, we propose a novel, exact border-based approach that provides an optimal solution for the hiding of sensitive frequent itemsets by (i) minimally extending the original database by a synthetically generated ...
    • A Learning-Based Spectrum Access Stackelberg Game: Friendly Jammer-Assisted Communication Confrontation 

      Qi N., Wang W., Xiao M., Jia L., Jin S., Zhu Q., Tsiftsis T.A. (2021)
      Defensive and offensive capabilities are both significant in communication confrontation games. By exploiting the above two capabilities, a new confrontation mechanism in the spectrum domain between two opposing teams ...
    • Optimal algorithms for hierarchical web caches 

      Poularakis, K.; Tassiulas, L. (2013)
      Hierarchical topologies have been applied in many existing systems that provide public IPTV or massive content delivery services. The efficient operation of these services requires massive bandwidth resources. Data caching ...
    • Optimal cooperative content placement algorithms in hierarchical cache topologies 

      Poularakis, K.; Tassiulas, L. (2012)
      The tremendous growth in the use of the World Wide Web and the expansion of Video On Demand and IPTV services increase the bandwidth demands, enforcing the creation of congestion in Internet's links and the experience of ...
    • Transmit rate control for energy-efficient estimation in wireless sensor networks 

      Koutsopoulos, I.; Stánczak, S.; Feistel, A. (2010)
      We study the impact of physical layer (PHY) transmit rate control on energy efficient estimation in wireless sensor networks. A sensor network collects measurements and transmits them to a Fusion Center (FC) with controllable ...