Parcourir par sujet "Combinatorial optimization"

Benders decomposition with integer subproblem

Fakhri A., Ghatee M., Fragkogios A., Saharidis G.K.D. (2017)

The application of Benders decomposition method to a problem might result in a subproblem including integer variables. In this case, it is not able to apply the classical Benders algorithm. In this study we present a ...

Caching and operator cooperation policies for layered video content delivery

Poularakis K., Iosifidis G., Argyriou A., Koutsopoulos I., Tassiulas L. (2016)

Distributed caching architectures have been proposed for bringing content close to requesters and the key problem is to design caching algorithms for reducing content delivery delay. The problem obtains an interesting new ...

Content placement in heterogeneous end-to-end virtual networks

Katsalis K., Sourlas V., Papapioannou T., Korakis T., Tassiulas L. (2015)

One of the distinctive features of the new virtualized ecosystem, is the multi-stakeholder participation in the way cloud services are designed, deployed and offered. In this work, we address the emerging content replication ...

Data Replication and Virtual Machine Migrations to Mitigate Network Overhead in Edge Computing Systems

Tziritas N., Koziri M., Bachtsevani A., Loukopoulos T., Stamoulis G., Khan S.U., Xu C.-Z. (2017)

Several virtual machine (VM) placement algorithms have been proposed and studied in the literature with various scopes such as server consolidation or network cost minimization. In most cases, decisions on VM migrations ...

Distributed caching algorithms in the realm of layered video streaming

Poularakis K., Iosifidis G., Argyriou A., Koutsopoulos I., Tassiulas L. (2019)

Distributed caching architectures have been proposed for bringing content close to requesters, and the key problem is to design caching algorithms for reducing content delivery delay, which determines to an extent the user ...

Energy efficient resource allocation scheme via auction-based offloading in next-generation heterogeneous networks

Bousia A. (2017)

The focus of this chapter is centered on the network underutilization during low traffic periods (e.g., night zone), which enables the Mobile Network Operators (MNOs) to save energy by having their traffic served by ...

Joint EPC and RAN Caching of Tiled VR Videos for Mobile Networks

Liu K., Liu Y., Liu J., Argyriou A., Ding Y. (2019)

In recent years, 360-degree VR (Virtual Reality) video has brought an immersive way to consume content. People can watch matches, play games and view movies by wearing VR headsets. To provide such online VR video services ...