A5028424032- Software-Defined Networks and 5G
- Advanced MIMO Systems Optimization
- Cooperative Communication and Network Coding
- Photonic and Optical Devices
- IoT and Edge/Fog Computing
- Telecommunications and Broadcasting Technologies
- Advanced Photonic Communication Systems
- Optical Network Technologies
- Satellite Communication Systems
- Advanced Wireless Network Optimization
- Advanced Wireless Communication Technologies
- Cognitive Radio Networks and Spectrum Sensing
- Full-Duplex Wireless Communications
- Photorefractive and Nonlinear Optics
- Mobile Agent-Based Network Management
- Advanced Optical Network Technologies
- Power Line Communications and Noise
- Wireless Networks and Protocols
- Opportunistic and Delay-Tolerant Networks
- Service-Oriented Architecture and Web Services
- Welding Techniques and Residual Stresses
- Semiconductor Lasers and Optical Devices
- Distributed systems and fault tolerance
- Ocular and Laser Science Research
- Modular Robots and Swarm Intelligence
WINGS ICT Solutions (Greece)
2022-2023
Qatar University
2021
National and Kapodistrian University of Athens
1998-2021
Centre Tecnologic de Telecomunicacions de Catalunya
2021
University of South Wales
2021
Iquadrat (Spain)
2021
Syracuse University
2021
Instituto de Telecomunicações
2021
Hellenic Telecommunications Organization (Greece)
2010-2019
Otemae College of Nutrition
2019
Network Service Chaining (NSC) is a service deployment concept that promises increased flexibility and cost efficiency for future carrier networks. NSC has received considerable attention in the standardization research communities lately. However, largely undefined peer-reviewed literature. In fact, literature review reveals role of enabling technologies up discussion, so are key challenges lying ahead. This paper addresses these topics by motivating our interest towards advanced dynamic...
Media use cases for emergency services require mission-critical levels of reliability the delivery media-rich services, such as video streaming. With upcoming deployment fifth generation (5G) networks, a wide variety applications and with heterogeneous performance requirements are expected to be supported, any migration 5G networks presents significant challenges in quality service (QoS), operators. This paper novel SliceNet framework, based on advanced customizable network slicing address...
The rise of cloud services poses considerable challenges on the control both and carrier network infrastructures. While traditional telecom rely rather static processes (often involving manual steps), wide adoption mobile devices including tablets, smartphones wearables introduce previously unseen dynamics in creation, scaling withdrawal new services. These phenomena require optimal flexibility characterization services, as well orchestration infrastructure. This paper proposes a unified...
5G is promising a drastic change when it comes to providing services vertical sectors. At technology level, different initiatives are working on finding new or more efficient solutions for solving aspects related 5G. Those technologies expected deeply the market all involved stakeholders. This paper aims give view of 5G-MEDIA project how could by means introduction empowering value, looking at from perspective domain, specifically media organizations. The presents three business scenarios,...
Efficient coordination among network elements and optimal resource utilization in heterogeneous mobile networks (HMNs) is a key factor for the success of future 5G systems. The COHERENT project focuses on developing an innovative programmable control framework which aware underlying topology, radio environment traffic conditions, can efficiently coordinate available spectrum resources. In this paper, we provide set scenarios use cases that intends to address.
This paper presents the vision of 5G STEP-FWD project, funded by European Commission, with objective to propose a novel optical-wireless networking solution for provision high speed connectivity end users. The features new architecture, based on utilization Ultra-Dense Wavelength Division Multiplexing Passive Optical Networks as backhaul network, providing access hyper dense mmWave networks, are presented in detail. Moreover, research challenges meet requirements terms low latency, spectral...
The scope of this paper is to introduce an innovative paradigm for cognitive self-managed elements the Future Internet. present Internet model based on clear separation concerns between protocol layers, with intelligence moved edges, and existent pool targeting user control plane operations less emphasis management tasks. shall be engineered behavior a high degree autonomy, by proposing operation around novel hierarchical feedback-control cycle. concepts are Distributed Cognitive cycle...
A 2 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\,\times\,$</tex> </formula> Switch Matrix operating at the 3.3–3.8 GHz frequency band is presented. The design based on PIN diode switch elements. achieved isolation below 80 dB, while insertion loss less than dB for full band. proposed used as antenna switching element in RF Front-End of a WiMAX Relay Station, supporting both Time-domain Transmit...
The expected huge increase of mobile devices and user data demand by 2020 will stress the current network in an unprecedented way. future networks must meet several strong requirements regarding rate, latency, quality service experience, mobility, spectrum energy efficiency. Therefore, efforts for more efficient solutions have been recently initiated. To this direction, load balancing has attracted much attention as a promising solution higher resource utilization, improved system...
Software Defined Networks (SDN) offers the opportunity to drive down costs through increased operational efficiency-network utilization in particular-service creation velocity, and differentiated personalized network services. This way CAPEX OPEX for operator are going be drawn same will end user. In context of UNIFY project [1], one main objectives is focus on enablers such unified production environment develop an automated, dynamic service platform, leveraging a fine-granular chaining...
Development of programmable photonic devices for future flexible optical networks is ongoing. To this end, an innovative, multi-format QAM transmitter design presented. It comprises a segmented-electrode InP IQ-MZM to be fabricated in InP, which can directly driven by low-power CMOS logic. Arbitrary format generation made possible using only binary electrical signals, without the need high-performance DACs and high-swing linear drivers. The concept enables host Tx-side DSP functionality,...
The scope of this paper is to introduce an innovative paradigm for cognitive self-managed elements the Future Internet. present Internet model based on clear separation concerns between protocol layers, with intelligence moved edges, and existent pool targeting
In this paper we present the implementation of an experimental FDD, QPSK, millimeter-wave radio modem (57-64 GHz) for Point to (PtP) wireless backhaul applications. The transceiver supports GbE targeting a two-chip solution plus antenna subsystem, aiming at highly integrated functions in 90nm CMOS technology, range more than 1km. Achieving these levels overall integration and silicon requires many technological challenges innovative design approaches. Furthermore, it allows drastic changes...
In order to enable rapid and cost-effective deployment of WiMAX networks, relay technology which does not require backhaul line, can be considered as an essential feature for performing a successful business development. the scope proposed Multi-Hop network architecture, (based on recently developed IEEE 802.16j standard in enhance throughput, coverage capacity density), we provide description Relay Station Software architecture design (PHY MAC layers architecture), it has been by REWIND...
In this paper, we present an "Asymmetric Passive Optical Network for xDSL and FTTH Access" (PANDA) architecture that is suitable providing end-users with broadband connections in a cost-effective non-disruptive fashion. We first describe the need expanding current ADSL access to VDSL (and ultimately FTTH), as well network upgrades will be required perform expansion. then introduce PANDA architecture, multiwavelength passive optical (PON) implements fiber-to-the cabinet (FTTC) scheme provides...
This paper presents an overview of current research investigations within the WHERE-2 Project with respect to location-dependent information extraction and how this can be used towards benefit positioning. It is split into two main sections; first one relies on non-radio means such as inertial sensors prior knowledge about environment geometry, which in form map constraints improve user positioning precision indoor environments. The second section location-specific radio exploited a more...
Future networks including the Fifth Generation (5G) and beyond mobile shall manage, control orchestrate new services for users especially vertical sectors, thereby they maximize potential of 5G infrastructures their services. Network slicing has emerged as a major networking paradigm meeting diverse requirements various businesses in virtualized softwarised networks. SliceNet is project EU Infrastructure Public Private Partnership (5G PPP) focuses on network cornerstone technology This...
In this paper, we first briefly review the main operational aspects of FTTC (xPON)/VDSL2 access networks. Then, present performance measurements with respect to network sub loop operating length and VDSL2 profiles (8b, 12a, 17a), studying rates that can be achieved at different scenarios. We then provide results effect stationary crosstalk non-stationary impulse noise on provisioned service in an network.
The need to provide broadband in a uniform manner all European citizens, regardless where their home is or what country, pushing for long time the scientific community find alternatives terrestrial xDSL, colliding with have solutions that are not too expensive terms of infrastructure and deployment costs. project SAT4NET, funded under ARTES 1 program Space Agency (ESA), has goal analyzing technical economic feasibility an integrated xDSL/satellite network architecture. key idea exploit very...