Michail Alexandros Kourtis

Michail Alexandros Kourtis
National Center for Scientific Research Demokritos | ncsr · Insititute of Informatics and Telecommunications

PhD

About

81
Publications
45,801
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764
Citations
Introduction
Michail Alexandros Kourtis, PhD currently works at the Insititute of Informatics and Telecommunications, National Center for Scientific Research Demokritos. Michail does research in Distributed Computing, Computer Security and Reliability and Computer Communications (Networks).
Additional affiliations
September 2011 - present
National Center for Scientific Research Demokritos
Position
  • Research Associate
Education
April 2015 - December 2018
Universidad del País Vasco / Euskal Herriko Unibertsitatea
Field of study
  • Video Quality Assessment, NFV, 5G

Publications

Publications (81)
Article
Full-text available
This paper aims to develop an open Asset Administration Shell (AAS) solution for 5G Non-Public Network (NPN) management, focusing on manufacturing digitization and complete Information and Operational Technology (IT/OT) convergence. The proposed 5G NPN framework is evaluated in a factory-like simulation scenario considering network slicing for I4.0...
Article
Full-text available
The definition of multiple slicing types in 5G has created a wide field for service innovation in communications. However, the advantages that network slicing has to offer remain to be fully exploited by today’s applications and users. An important area that can potentially benefit from 5G slicing is emergency communications for First Responders. T...
Article
Full-text available
The present paper discusses several security requirements coming from assessment of the use cases developed within the context of the original 5G-PPP "5G ESSENCE" project. Following to a concrete introduction to the project's main innovative features and the description of all selected use cases coming directly from the vertical markets, we have se...
Article
Full-text available
Next-generation mobile technologies are the enablers for meeting the variable specific requirements of the public safety (PS) community. In particular, due to the development of commercially deployed 5G networks, PS providers look for ways to implement related solutions upon such infrastructures, potentially in a shared use with existing commercial...
Article
Full-text available
Energy efficiency is a huge opportunity for both the developed and the developing world, and ICT will be the key enabler towards realising this challenge, in a huge variety of ways across the full range of industries. In the telecommunications space in particular, power consumption and the resulting energy-related pollution are becoming major opera...
Article
Full-text available
The advent of deep-learning technology promises major leaps forward in addressing the ever-enduring problems of wireless resource control and optimization, and improving key network performances, such as energy efficiency, spectral efficiency, transmission latency, etc. Therefore, a common understanding for quantum deep-learning algorithms is that...
Chapter
The rapid development of 5G provides opportunities for growth for a great variety of services, also including cooperative Intelligent Transport Services (C-ITS). In this framework, of high importance are Vehicle-to-Everything (V2X) applications that can contribute towards improving driving safety, efficiency and comfort, together with the inclusion...
Chapter
The 5G System (5GS) is regarded as a multi-faceted, universal communication platform that could address the increasingly stringent requirements of both modern industries and network end users. Several proposed mechanisms, such as network slicing or its control exposure, aimed to facilitate access to the network for the external stakeholders, enable...
Article
Full-text available
The 5G communication network will underpin a vast number of new and emerging services, paving the way for unprecedented performance and capabilities in mobile networks. In this setting, the Internet of Things (IoT) will proliferate, and IoT devices will be included in many 5G application contexts, including the Smart Grid. Even though 5G technology...
Article
Full-text available
Rapid expansion of 5G affects a number of sectors, including vehicular communications relying on cooperative intelligent transportation systems (C-ITS). More specifically, in the context of the Internet of Vehicles (IoV), a particular emphasis is placed on modern cellular V2X (C-V2X) technologies aiming to further improve road safety. This work ori...
Article
Full-text available
Recently Unmanned Aerial Vehicles (UAVs) have evolved considerably towards real world applications, going beyond entertaining activities and use. With the advent of Fifth Generation (5G) cellular networks and the number of UAVs to be increased significantly, it is created the opportunity for UAVs to participate in the realisation of 5G opportunisti...
Article
In the current 5G technology domain network slicing already plays an important role as a critical enabler. An industry that 5G aims to disrupt is the vehicular one. In this paper the brief scope of the 5G‐DRIVE research project is presented, regarding 5G vehicular research between the EU and China. In the frame of 5G‐DRIVE a set of slicing mechanis...
Chapter
Based upon the scope of the original 5G ESSENCE research effort and by considering the related fundamental architecture, we develop a dedicated scenario for the implementation and demonstration of a setup for a 5G edge network acceleration in the context of a sport event, taking place in a stadium. Specifically, we demonstrate a combined 5G-based v...
Conference Paper
The emerging technologies in the field of telecommunications have evolved into the paradigm of 5G. 5G technology is aimed to become sufficiently flexible to handle a wide variety of network services from various domains. One of the aspects envisaged by 5G is the virtualization of small cells, which allows enhanced mobile edge computing capabilities...
Chapter
The emerging technologies in the field of telecommunications have evolved into the paradigm of 5G. The 5G technology suggests that communication networks can become sufficiently flexible to handle a wide variety of network services from various domains. One of the aspects envisaged by 5G is the virtualization of small cells, which allows enhanced m...
Conference Paper
To address the limitations of legacy Public Safety (PS) solutions, as narrow bandwidth, high deployment cost and poor flexibility, the 5G cellular systems have been proposed. The architecture proposed by the 5G ESSENCE project is based on a cloud-enabled small cell infrastructure with a fully distributed orchestration architecture leveraging multi-...
Article
Although network functions virtualization redefined the role of the network service developer, existing concepts that are supposed to enable them are still limited, cumbersome, and time consuming in regard to the promised flexibility. This article describes how to move forward from these initial steps, identifies the challenges network service deve...
Chapter
The 5G will not only be a kind of progress of mobile broadband networks but will also create a set of novel and unique network and service capabilities, structuring a form of a sustainable and scalable technology. Based on the context of the on-going progress of the actual “5G-ESSENCE” EU-funded project and, in particular, upon its innovative archi...
Article
The evolution of 5G suggests that communication networks become sufficiently flexible to handle a wide variety of network services from various domains. The virtualization of small cells as envisaged by 5G, allows enhanced mobile edge computing capabilities, thus enabling network service deployment and management near the end user. This paper prese...
Article
Integrating joint network function virtualization (NFV) and software-defined networks (SDNs) with digital televisions (TVs) into home environments, has the potential to provide smart TV services to users, and improve their quality of experience (QoE). In this regard, this paper focuses on one of the next generation services so-called follow me serv...
Chapter
This chapter discusses the evolution of the cloud computing paradigm and its applicability in various sections of the computing and networking/telecommunications industry, such as the cloud networking, the cloud offloading, and the network function virtualization. The new heterogeneous virtualized ecosystem that is formulated creates new needs and...
Conference Paper
Software Defined Networking (SDN) and Network Function Virtualisation (NFV) are transforming modern networks towards a service-oriented architecture. At the same time, the cybersecurity industry is rapidly adopting Machine Learning (ML) algorithms to improve detection and mitigation of complex attacks. Traditional intrusion detection systems perfor...
Article
Full-text available
In future 5G and beyond radio systems, access points equipped with massive antennas will be deployed to support the increased communication demands. As a result, radio environments will become more dense and users will be exposed to higher electromagnetic field (EMF) radiation from wireless devices than today. This paper proposes to take preemptive...
Conference Paper
Programmability, control and flexibility can be considered as some of the indirect enablers for the success of 5G technologies. A key driver towards this are mechanisms or methodologies to drive shorter time to market for suppliers and operators of virtual network functions (VNFs) and network services. 5GTANGO includes a DevOps approach that can be...
Chapter
The paper work presents the essential architectural approach that has been proposed in the framework of the modern “5G-ESSENCE” EU-funded project, intending to develop a suitable ecosystem for serving real-life use cases associated to vertical industries and built on the pillars of network functions virtualisation (NFV), mobile-edge computing (MEC)...
Article
Full-text available
5G envisages a "hyper-connected society" where an enormous number of diverse entities could communicate with each other anywhere and at any time, some of which will demand extremely challenging performance requirements such as sub-millisecond latency, and higher data rates. Cloud-enabled radio access networks where intelligence is placed at the edg...
Article
Full-text available
One of the primary challenges associated with Network Functions Virtualization (NFV) is the automated management of the service lifecycle. In this paper, we present a full software-based MANO (Management and Orchestration) stack which operates with OpenStack and OpenDaylight controllers and has the in-built functionality to automate the key phases...
Conference Paper
Full-text available
SHIELD is an EU-funded project, targeting at the design and development of a novel cybersecurity framework, which offers security-as-a-Service in an evolved telco environment. The SHIELD framework leverages NFV (Network Functions Virtualization) and SDN (Software-Defined Networking) for virtualization and dynamic placement of virtualised security a...
Article
Full-text available
This paper proposes a novel video quality assessment method aimed for the next generation (5G) mobile networks, following the small cell deployment architecture. The proposed method is based on a novel usage of the structural similarity (SSIM) index, as a Reduced Reference metric and is suitable for implementation as a Virtual Network Function (VNF...
Conference Paper
Full-text available
The concept of network slicing opens the possibilities to address the complex requirements of multi-tenancy in 5G. To this end, SDN/NFV can act as technology enabler. This paper presents a centralised and dynamic approach for creating and provisioning network slices for virtual network operators' consumption to offer services to their end customers...
Article
Full-text available
The fast growing development of Network Function Virtualization (NFV) trends and the remarkable progress of Software Defined Networking (SDN), have yield a synergy between both, towards the provision of convergent networking solutions. Since the traditional networking principles were not designed according to NVF specification, a work has surged de...
Conference Paper
The challenging traits of 5G networks to support novel and diverse business requirements of vertical sectors have rendered current network security approaches impotent. To address various security requirements of 5G networks and services, a holistic and robust security architecture mindful of 5G technical and business features becomes vital. This p...
Conference Paper
Large-scale, carrier-grade Network Functions Virtualisation (NFV) services are expected to involve a significant number of Virtual Network Functions, deployed across multiple Points-of-Presence (PoPs) and possibly in heterogeneous infrastructures. While proper monitoring is crucial for the commercial viability of NFV services, effectively and effic...
Article
Full-text available
A reduced-reference video quality assessment (VQA) method was proposed by using structural similarity (SSIM) index as a tool to extract features from both the original and the target video sequences, using a reference video pattern. The method is suitable for monitoring the video quality in real time and across the service provision chain. The perf...
Conference Paper
Full-text available
The surge of the Internet traffic with exabytes of data flowing over operators’ mobile networks has created the need to rethink the paradigms behind the design of the mobile network architecture. The inadequacy of the 4G UMTS Long term Evolution (LTE) and even of its advanced version LTE-A is evident, considering that the traffic will be extremely...
Conference Paper
Full-text available
Network Functions Virtualization is focused on migrating traditional hardware-based network functions to software-based appliances running on standard high volume severs. There are a variety of challenges facing early adopters of Network Function Virtualizations; key among them are resource and service mapping, to support virtual network function o...
Conference Paper
Full-text available
As the rollout of NFV in the Telecommunications domain gains momentum, methods that enable the automated and performant deployment of VNFs are required to support large scale deployments. This paper presents a framework that enables the automated characterization of VNFs and modelling of the relationships between resource types, quantities and achi...
Conference Paper
Full-text available
Most challenges associated with Network Functions Virtualisation (NFV) are related to the automated and large-scale deployment of virtualised network functions (VNFs) within an operational infrastructure, as well as their availability and performance. In order to effectively face these challenges, efficient and comprehensive monitoring of NFV servi...
Conference Paper
Full-text available
The primary goal of Network Function Virtualization (NFV) is the migration of physical network functions to software versions running on virtual machines (VM) in cloud computing environments. Rapid developments in virtualization technologies have made high-speed network connections and line rate packet processing viable in virtualized infrastructur...
Chapter
This chapter discusses the evolution of the cloud computing paradigm and its applicability in various sections of the computing and networking/telecommunications industry, such as the cloud networking, the cloud offloading, and the network function virtualization. The new heterogeneous virtualized ecosystem that is formulated creates new needs and...