Publications

Building virtual 802.11 testbeds towards open 5G experimentation

Authors: Kostas Kousias, Kostas Katsalis, Donatos Stavropoulos, Thanasis Korakis and Leandros Tassiulas

Conference: Wireless Communications and Networking Conference (WCNC), Doha, Qatar, 3-6 April 2016

Abstract: Together with recent advancements in Radio Access Network (RAN) technologies, Wi-Fi is expected to be at the center of research on the subject of ubiquitous wireless connectivity, towards building the new 5G ecosystem. Nevertheless, the necessary testbed infrastructure to support large scale experimentally driven research seems to be missing. In this work we present the design and implementation of a novel Virtual Wi-Fi Testbed. We present how a traditional Wireless Testbed can support hundreds of virtual Wi-Fi nodes that are open to experimenters. We discuss the design and implementation of the virtualization tools. We demonstrate the accuracy and the overhead analysis of the approach in the face of actual testbed conditions. Implementation experience is also reported on the benefits of using the proposed virtualization approach for a simple association algorithm.

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European Challenges for Experimental Facilities

Authors: Hans Schaffers, Thanasis Korakis, Congduc Pham, Abdur Rahim, Antonio Jara and Martin Serrano

Publication Details: Building the Future Internet through FIRE, ch. 1, pp 3-42, River Publishers, June 2017

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Building the Future Internet through FIRE

Authors: Martin Serrano, Nikolaos Isaris, Hans Schaffers, John Domingue, Michael Boniface and Thanasis Korakis

Publication Details: 2016 FIRE Book: a Research and Experimentation based Approach, River Publishers, June 2017

Abstract: The Internet as we know it today is the result of a continuous activity for improving network communications, end user services, computational processes and also information technology infrastructures. The Internet has become a critical infrastructure for the human-being by offering complex networking services and end-user applications that all together have transformed all aspects, mainly economical, of our lives. Recently, with the advent of new paradigms and the progress in wireless technology, sensor networks and information systems and also the inexorable shift towards everything connected paradigm, first as known as the Internet of Things and lately envisioning into the Internet of Everything, a data-driven society has been created. In a data-driven society, productivity, knowledge, and experience are dependent on increasingly open, dynamic, interdependent and complex Internet services. The challenge for the Internet of the Future design is to build robust enabling technologies, implement and deploy adaptive systems, to create business opportunities considering increasing uncertainties and emergent systemic behaviors where humans and machines seamlessly cooperate.

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Implementation experience in multi-domain SDN: Challenges, consolidation and future directions

Authors: Kostas Katsalis, Bijan Rofoee, Giada Landi, Jordi Ferrer Riera, Kostas Kousias, Markos Anastasopoulos, Laszlo Kiraly, Anna Tzanakaki and Thanasis Korakis

Journal: Elsevier Computer Networks, vol. 129, Part 1, pp. 142–158, December 2017

Abstract: Network architectures compliant with the Software Defined Networking (SDN) design paradigm, are expected to provide extreme flexibility for service orientation and allow for efficient use of network resources of cloud systems. Nevertheless, radical reconsidering and removal of boundaries set out when studying multi-domain communications are required, in order to unleash the hidden potential of SDN and provide a “holistic” network view. Although many domain-specific efforts have been proposed in the literature and indeed they gain a lot of industrial attention, real multi-domain SDN implementations over converged wireless-optical networks are just starting to disclose.

In this work we present an open end-to-end multi-domain SDN system, while focusing on the necessary abstractions and virtualization techniques to integrate virtual wireless and optical resources. With the proposed system, called CONTENT, we shed light in the field of wireless-optical network virtualization from an end-to-end perspective. We present the architecture and the integrated testbed that realize the envisioned system. Evaluation results are provided and implementation experience is reported using the integrated solution. The way SDN methodologies and techniques can be used to support NFV concepts in end-to-end fashion are also presented.

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