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407 results on '"Tsaoussidis, Vassilis"'

1. An Open-Source Experimentation Framework for the Edge Cloud Continuum

Author

Koukis, Georgios, Skaperas, Sotiris, Kapetanidou, Ioanna Angeliki, Tsaoussidis, Vassilis, and Mamatas, Lefteris

Subjects
Computer Science - Distributed, Parallel, and Cluster Computing, Computer Science - Networking and Internet Architecture
Abstract

The CODECO Experimentation Framework is an open-source solution designed for the rapid experimentation of Kubernetes-based edge cloud deployments. It adopts a microservice-based architecture and introduces innovative abstractions for (i) the holistic deployment of Kubernetes clusters and associated applications, starting from the VM allocation level; (ii) declarative cross-layer experiment configuration; and (iii) automation features covering the entire experimental process, from the configuration up to the results visualization. We present proof-of-concept results that demonstrate the above capabilities in three distinct contexts: (i) a comparative evaluation of various network fabrics across different edge-oriented Kubernetes distributions; (ii) the automated deployment of EdgeNet, which is a complex edge cloud orchestration system; and (iii) an assessment of anomaly detection (AD) workflows tailored for edge environments., Comment: To be published in IEEE INFOCOM CNERT Workshop

Published
2024

3. On the Impact of Guest Traffic in Open-Access Domestic Broadband Sharing Schemes

Author

Lenas, Sotiris, Tsaoussidis, Vassilis, Sundaresan, Srikanth, Sathiaseelan, Arjuna, and Crowcroft, Jon

Subjects
Computer Science - Networking and Internet Architecture
Abstract

Open-access domestic broadband connection sharing constitutes a voluntary practice that is associated with societal, economic and public-safety benefits. Despite this fact, broadband subscribers are usually hesitant to freely share their broadband connection with guests for a multitude of reasons; one of them being sharing their network might hinder their own broadband quality of experience. In this paper, we investigate experimentally the impact of uplink guest traffic on the sharer's broadband quality of experience under both generic and broadband-sharing-specific packet scheduling policies. Both guest-user traffic and access point profiles employed in our study are developed by analyzing real-world traffic traces and measurements, captured from actual broadband sharing networking environments. Our results validate the suitability of hybrid packet scheduling policies for broadband sharing schemes and show that only a few dozen kilobytes per second of uplink guest traffic can be tolerated by sharers without hampering their broadband quality of experience. In this context, we show that the selection of the most appropriate packet scheduling policy for broadband sharing, as well as its respective configuration, depend largely on the capacity of the broadband connection and the policy's packet-dropping behavior on guest traffic.

Published
2018

6. Performance Evaluation of Kubernetes Networking Approaches across Constraint Edge Environments

Author

Koukis, Georgios, Skaperas, Sotiris, Kapetanidou, Ioanna Angeliki, Mamatas, Lefteris, Tsaoussidis, Vassilis, Koukis, Georgios, Skaperas, Sotiris, Kapetanidou, Ioanna Angeliki, Mamatas, Lefteris, and Tsaoussidis, Vassilis

Abstract

Kubernetes (K8s) serves as a mature orchestration system for the seamless deployment and management of containerized applications spanning across cloud and edge environments. Since high-performance connectivity and minimal resource utilization become critical factors as we approach the edge, evaluating the performance of K8s networking in this context is essential. This paper contributes to this effort, by conducting a qualitative and quantitative performance evaluation of diverse Container Network Interface (CNI) plugins within different K8s environments, incorporating lightweight implementations designed for the Edge. Our experimental assessment was conducted in two distinct (intra- and inter-host) scenarios, revealing interesting insights for both researchers and practitioners. For example, the deployment of plugins across lightweight distributions does not necessarily lead to resource utilization improvements, e.g., in terms of CPU/memory or throughput., Comment: Submitted: Proc. IEEE Int. Conf. Comput. Commun. ICCN Workshops (INFOCOM ICCN WKSHPS), Vancouver, Canada, 2024

Published
2024

7. A Pragmatical Approach to Anomaly Detection Evaluation in Edge Cloud Systems

Author

Skaperas, Sotiris, Koukis, George, Kapetanidou, Ioanna Angeliki, Tsaoussidis, Vassilis, Mamatas, Lefteris, Skaperas, Sotiris, Koukis, George, Kapetanidou, Ioanna Angeliki, Tsaoussidis, Vassilis, and Mamatas, Lefteris

Abstract

Anomaly detection (AD) has been recently employed in the context of edge cloud computing, e.g., for intrusion detection and identification of performance issues. However, state-of-the-art anomaly detection procedures do not systematically consider restrictions and performance requirements inherent to the edge, such as system responsiveness and resource consumption. In this paper, we attempt to investigate the performance of change-point based detectors, i.e., a class of lightweight and accurate AD methods, in relation to the requirements of edge cloud systems. Firstly, we review the theoretical properties of two major categories of change point approaches, i.e., Bayesian and cumulative sum (CUSUM), also discussing their suitability for edge systems. Secondly, we introduce a novel experimental methodology and apply it over two distinct edge cloud test-beds to evaluate the performance of such mechanisms in real-world edge environments. Our experimental results reveal important insights and trade-offs for the applicability and the online performance of the selected change point detectors., Comment: Submitted: Proc. IEEE Int. Conf. Comput. Commun. ICCN Workshops (INFOCOM ICCN WKSHPS), Vancouver, Canada, 2024

Published
2024

8. A Framework for Cognitive, Decentralized Container Orchestration

Author

Sofia, Rute C., primary, Salomon, Josh, additional, Ferlin-Reiter, Simone, additional, Garcés-Erice, Luis, additional, Urbanetz, Peter, additional, Mueller, Harald, additional, Touma, Rizkallah, additional, Espinosa, Alejandro, additional, Contreras, Luis M., additional, Theodorou, Vasileios, additional, Psaromanolakis, Nikos, additional, Mamatas, Lefteris, additional, Tsaoussidis, Vassilis, additional, Fu, Xiaoming, additional, Yuan, Tingting, additional, Del Rio, Alberto, additional, Jimenez, David, additional, Stam, Andries, additional, Paraskevoulakou, Efterpi, additional, Karamolegkos, Panagiotis, additional, Vieira, Vitor, additional, Martrat, Josep, additional, Prusiel, Ignacio Mariscal, additional, Matzakou, Dorine, additional, Soldatos, John, additional, Remon, David, additional, and Jahn, Marco, additional

Published
2024
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12. Buffering… Energy for Mobile Devices: A 'Store and Rendezvous' Approach

Author

Vardalis, Dimitris, Sarros, Christos-Alexandros, Tsaoussidis, Vassilis, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Mamatas, Lefteris, editor, Matta, Ibrahim, editor, Papadimitriou, Panagiotis, editor, and Koucheryavy, Yevgeni, editor

Published
2016
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13. Satellite-Assisted Disrupted Communications: IoT Case Study.

Author

Koukis, Georgios and Tsaoussidis, Vassilis

Subjects
INTERNET of things, WIRELESS sensor networks, TELECOMMUNICATION satellites, COMMUNICATION infrastructure, EARTH stations, SPACE industrialization, SMART cities, CONSTELLATIONS
Abstract

In recent years, the space industry has witnessed a resurgence, characterized by a notable proliferation of satellites operating at progressively lower altitudes, promising extensive global coverage and terrestrial-level data transfer speeds, while remaining cost-effective solutions. In particular, Wireless Sensor Networks (WSNs) can benefit from the wide coverage of space infrastructure due to their extensive deployment, disrupted communication nature, and the potential absence of terrestrial support. This study explored the utility of Low-Earth Orbit (LEO) satellite constellations as a communication infrastructure for interconnecting "smart" devices via ground stations in Internet of Things (IoT) scenarios. To this end, we designed and implemented a series of experiments conducted within the OMNeT++ simulator, utilizing an updated iteration of the original Open Source Satellite Simulator (OS3) framework. Our research encompassed an IoT Case Study, incorporating authentic sensor data sourced from the Smart Santander testbed. Throughout our experimentation, we investigated the impact of the constellation design parameters such as the number of satellites and orbital planes, as well as the inter-satellite link configuration on the obtained Round-Trip Time (RTT) and packet loss rates. [ABSTRACT FROM AUTHOR]

Published
2024
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15. Exploiting Communication Opportunities in Disrupted Network Environments

Author

Mamatas, Lefteris, Papadopoulou, Alexandra, Tsaoussidis, Vassilis, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Aguayo-Torres, Mari Carmen, editor, Gómez, Gerardo, editor, and Poncela, Javier, editor

Published
2015
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17. Achieving Energy-Efficiency with DTN: A Proof-of-Concept and Roadmap Study

Author

Vardalis, Dimitris, Tsaoussidis, Vassilis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Koucheryavy, Yevgeni, editor, Mamatas, Lefteris, editor, Matta, Ibrahim, editor, and Tsaoussidis, Vassilis, editor

Published
2012
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18. Reliable Data Streaming over Delay Tolerant Networks

Author

Lenas, Sotirios-Angelos, Burleigh, Scott C., Tsaoussidis, Vassilis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Koucheryavy, Yevgeni, editor, Mamatas, Lefteris, editor, Matta, Ibrahim, editor, and Tsaoussidis, Vassilis, editor

Published
2012
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19. On the Performance of Erasure Coding over Space DTNs

Author

Papastergiou, Giorgos, Bezirgiannidis, Nikolaos, Tsaoussidis, Vassilis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Koucheryavy, Yevgeni, editor, Mamatas, Lefteris, editor, Matta, Ibrahim, editor, and Tsaoussidis, Vassilis, editor

Published
2012
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20. Routing for Opportunistic Networks Based on Probabilistic Erasure Coding

Author

Tsapeli, Fani, Tsaoussidis, Vassilis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Koucheryavy, Yevgeni, editor, Mamatas, Lefteris, editor, Matta, Ibrahim, editor, and Tsaoussidis, Vassilis, editor

Published
2012
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21. Queue-Management Architecture for Delay Tolerant Networking

Author

Lenas, Sotirios-Angelos, Dimitriou, Stylianos, Tsapeli, Fani, Tsaoussidis, Vassilis, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Masip-Bruin, Xavier, editor, Verchere, Dominique, editor, Tsaoussidis, Vassilis, editor, and Yannuzzi, Marcelo, editor

Published
2011
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22. Energy-Efficient Internetworking with DTN

Author

Vardalis, Dimitris, Tsaoussidis, Vassilis, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Masip-Bruin, Xavier, editor, Verchere, Dominique, editor, Tsaoussidis, Vassilis, editor, and Yannuzzi, Marcelo, editor

Published
2011
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23. SPICE Testbed: A DTN Testbed for Satellite and Space Communications

Author

Komnios, Ioannis, Alexiadis, Ioannis, Bezirgiannidis, Nikolaos, Diamantopoulos, Sotiris, Lenas, Sotirios-Angelos, Papastergiou, Giorgos, Tsaoussidis, Vassilis, Akan, Ozgur, Series editor, Bellavista, Paolo, Series editor, Cao, Jiannong, Series editor, Coulson, Geoff, Series editor, Dressler, Falko, Series editor, Ferrari, Domenico, Series editor, Gerla, Mario, Series editor, Kobayashi, Hisashi, Series editor, Palazzo, Sergio, Series editor, Sahni, Sartaj, Series editor, Shen, Xuemin (Sherman), Series editor, Stan, Mircea, Series editor, Jia, Xiaohua, Series editor, Zomaya, Albert, Series editor, Leung, Victor C.M., editor, Chen, Min, editor, Wan, Jiafu, editor, and Zhang, Yin, editor

Published
2014
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24. Predicting Queueing Delays in Delay Tolerant Networks with Application in Space

Author

Bezirgiannidis, Nikolaos, Tsaoussidis, Vassilis, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Mellouk, Abdelhamid, editor, Fowler, Scott, editor, Hoceini, Saïd, editor, and Daachi, Boubaker, editor

Published
2014
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25. CARPOOL: Connectivity Plan Routing Protocol

Author

Komnios, Ioannis, Tsaoussidis, Vassilis, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Mellouk, Abdelhamid, editor, Fowler, Scott, editor, Hoceini, Saïd, editor, and Daachi, Boubaker, editor

Published
2014
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27. Performance Evaluation of τ-AIMD over Wireless Asynchronous Networks

Author

Lahanas, Adrian, Tsaoussidis, Vassilis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Braun, Torsten, editor, Carle, Georg, editor, Koucheryavy, Yevgeni, editor, and Tsaoussidis, Vassilis, editor

Published
2005
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31. Extending Internet into Space – ESA DTN Testbed Implementation and Evaluation

Author

Samaras, Christos, Komnios, Ioannis, Diamantopoulos, Sotirios, Koutsogiannis, Efthymios, Tsaoussidis, Vassilis, Papastergiou, Giorgos, Peccia, Nestor, Akan, Ozgur, Series editor, Bellavista, Paolo, Series editor, Cao, Jiannong, Series editor, Dressler, Falko, Series editor, Ferrari, Domenico, Series editor, Gerla, Mario, Series editor, Kobayashi, Hisashi, Series editor, Palazzo, Sergio, Series editor, Sahni, Sartaj, Series editor, Shen, Xuemin (Sherman), Series editor, Stan, Mircea, Series editor, Xiaohua, Jia, Series editor, Zomaya, Albert, Series editor, Coulson, Geoffrey, Series editor, Granelli, Fabrizio, editor, Skianis, Charalabos, editor, Chatzimisios, Periklis, editor, Xiao, Yang, editor, and Redana, Simone, editor

Published
2009
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32. AIRA: Additive Increase Rate Accelerator

Author

Psaras, Ioannis, Tsaoussidis, Vassilis, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Das, Amitabha, editor, Pung, Hung Keng, editor, Lee, Francis Bu Sung, editor, and Wong, Lawrence Wai Choong, editor

Published
2008
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33. A Quality Adaptation Scheme for Internet Video Streams

Author

Papadimitriou, Panagiotis, Tsaoussidis, Vassilis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Boavida, Fernando, editor, Monteiro, Edmundo, editor, Mascolo, Saverio, editor, and Koucheryavy, Yevgeni, editor

Published
2007
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34. The TCP Minimum RTO Revisited

Author

Psaras, Ioannis, Tsaoussidis, Vassilis, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Akyildiz, Ian F., editor, Sivakumar, Raghupathy, editor, Ekici, Eylem, editor, Oliveira, Jaudelice Cavalcante de, editor, and McNair, Janise, editor

Published
2007
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35. Evaluating TCP Mechanisms for Real-Time Streaming over Satellite Links

Author

Papadimitriou, Panagiotis, Tsaoussidis, Vassilis, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Braun, Torsten, editor, Carle, Georg, editor, Fahmy, Sonia, editor, and Koucheryavy, Yevgeni, editor

Published
2006
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41. Logically-Centralized SDN-Based NDN Strategies for Wireless Mesh Smart-City Networks †.

Author

Kalafatidis, Sarantis, Skaperas, Sotiris, Demiroglou, Vassilis, Mamatas, Lefteris, and Tsaoussidis, Vassilis

Subjects
WIRELESS mesh networks, MESH networks, TELECOMMUNICATION, SOFTWARE-defined networking, INTERNET of things
Abstract

The Internet of Things (IoT) is a key technology for smart community networks, such as smart-city environments, and its evolution calls for stringent performance requirements (e.g., low delay) to support efficient communication among a wide range of objects, including people, sensors, vehicles, etc. At the same time, these ecosystems usually adopt wireless mesh technology to extend their communication range in large-scale IoT deployments. However, due to the high range of coverage, the smart-city WMNs may face different network challenges according to the network characteristic, for example, (i) areas that include a significant number of wireless nodes or (ii) areas with frequent dynamic changes such as link failures due to unstable topologies. Named-Data Networking (NDN) can enhance WMNs to meet such IoT requirements, thanks to the content naming scheme and in-network caching, but it necessitates adaptability to the challenging conditions of WMNs. In this work, we aim at efficient end-to-end NDN communication in terms of performance (i.e., delay), performing extended experimentation over a real WMN, evaluating and discussing the benefits provided by two SDN-based NDN strategies: (1) a dynamic SDN-based solution that integrates the NDN operation with the routing decisions of a WMN routing protocol; (2) a static one which based on SDN-based clustering and real WMN performance measurements. Our key contributions include (i) the implementation of two types of NDN path selection strategies; (ii) experimentation and data collection over the w-iLab.t Fed4FIRE+ testbed with real WMN conditions; (ii) real measurements released as open-data, related to the performance of the wireless links in terms of RSSI, delay, and packet loss among the wireless nodes of the corresponding testbed. [ABSTRACT FROM AUTHOR]

Published
2023
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