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Theodoros Rokkas

Theodoros Rokkas
INCITES Consulting

PhD

About

43
Publications
10,835
Reads
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318
Citations
Citations since 2016
23 Research Items
236 Citations
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201620172018201920202021202201020304050
201620172018201920202021202201020304050

Publications

Publications (43)
Article
Full-text available
The technological leap of smart technologies and the Internet of Things has advanced the conventional model of the electrical power and energy systems into a new digital era, widely known as the Smart Grid. The advent of Smart Grids provides multiple benefits, such as self-monitoring, self-healing and pervasive control. However, it also raises cruc...
Chapter
The introduction of novel approaches that cause a paradigm shift on a technological level can become the driver of innovative business models that benefit from capabilities that may have emerged. Such is the case for 5G which offers an entirely new way of delivering services that affects consumers and even more fundamentally the providers. The intr...
Article
Full-text available
Fifth generation (5G) envisages a “hyperconnected society” with an enormous number of interconnected devices, anywhere and at any time. Edge computing plays a pivotal role in this vision, enabling low latency, large traffic volumes, and improved quality of experience. The advent of 5G and edge computing encourages vertical industries to develop inn...
Conference Paper
Full-text available
A techno economic analysis for a C-RAN architecture in a Crowded Events (CE) offering immersive video services is presented. The analysis shows that investments for an IVS in CE relying on edge cloud resources are viable with an expected payback period of 6.5 years. Index Terms-Techno economic analysis, Immersive video services (IVS), Small cells (...
Chapter
The need for densification in 5G networks will necessitate the installation of large amounts of small cells in dense urban environments in order to meet future demands for capacity. The Neutral Host model has been proposed as a potential solution to this problem. This paper discusses the general regulatory considerations of 5G networks and specific...
Chapter
5G networks will offer advanced functionalities and features such as high throughput, low latency, security and reliability by leveraging technological advances like network virtualization, edge computing and network slicing. The latter will facilitate the entrance of new players in the value chain. Moreover, they will offer a means for network ope...
Conference Paper
Full-text available
The economic feasibility of a 5G media service in converged optical/wireless networks for crowded events in venues shows a ~6.5years payback period. Sensitivity analysis highlights the impact of tariffs and CAPEX on net present value.
Conference Paper
The cost evolution and power consumption of different 400G transceivers are modeled and the benefits of constructing and scaling the Facebook’s datacenter Fabric utilizing different technologies is presented through comparative cost and power consumption analysis
Conference Paper
Through the advanced coordination and orchestration realised within the wider SESAME project concept, a new architecture has been defined and proposed, aiming to attend several operators/service providers and “engage” them in a modern multi-tenant ecosystem, so that to fully serve the broader vision of the 5G; in particular, this takes place by emp...
Conference Paper
Full-text available
The core challenges in the actual SESAME EU-funded project is to develop an ecosystem to sustain network infrastructure openness, built on the pillars of network functions virtualization (NFV), mobile-edge computing (MEC) capabilities and cognitive network management that will provide multi-tenancy and flexible cloud-network interaction with highly...
Conference Paper
Although 5G promises advanced features such as low latency, high data rates and reliability as well as high socio-economic value, the business opportunities of the proposed solutions have not yet been examined. In this paper, the SESAME approach along with spectrum sharing options and indicative use cases are initially described. The incentives for...
Article
5G networks are rapidly becoming the means to accommodate the complex demands of vertical sectors. The European project CHARISMA is aiming to develop a hierarchical, distributed-intelligence 5G architecture, offering low latency, security, and open access as features intrinsic to its design. Finding its place in such a complex landscape consisting...
Conference Paper
Full-text available
The Cloud Enabled Small Cell (CESC) concept proposed in EU funded project SESAME has emerged as a promising solution to form a multi-tenant, multi-service architecture at the network edge according to 5G needs. It allows several operators/service providers to engage in a sharing model of both radio access capacity and Mobile Edge Computing (MEC) ca...
Article
Full-text available
CHARISMA aims to tackle low-latency and end-to-end security for converged fixed/wireless 5G networks in order to meet the complex demands of emerging business paradigms, such as Smart Cities, eHealth and Industry 4.0. In this paper, we present the key drivers and requirements towards a hierarchical, distributed-intelligence 5G architecture, support...
Conference Paper
Full-text available
5G networks aims to tackle the complex demands of emerging business paradigms, such as Smart Cities, eHealth, and Industry 4.0. In this paper, a hierarchical, distributed intelligence 5G architecture is described, offering low latency, security, and open access as features intrinsic to its design. SDN and NFV principles are employed to create a net...
Conference Paper
Full-text available
The impact of photonics in telecommunications is indisputably massive; however it relies on efficient cost reduction which is in turn only possible if significant cost savings are made at all steps in the development of the photonic device from the material to packaging. The PHOTOPOLIS consortium has identified polymer technology as the ideal solut...
Article
A system-of-systems (SoS) approach for wavelength-division multiplexing (WDM) and time-division multiplexing (TDM) fiber-to-the-home (FTTH) telecommunication networks is presented. Cost evolution curves for individual systems as well for whole FTTH WDM and TDM networks are presented. The analysis can be exploited for a fast and accurate analysis of...
Article
The deployment of next generation access networks (NGAs) is investigated from technical, regulatory and investment perspectives. A brief review of the possible network architectures and deployment scenarios of NGAs is provided. Risk calculations of these NGA scenarios are performed based on a fully detailed techno-economic model. Furthermore, the e...
Article
Full-text available
Passive optical networks (PONs) are being widely considered as a means to implement fiber-to-the-home (FTTH) and deliver broadband access to business and home users. However, technical and consequently regulatory and economic complexities arise in light of their deployment. In this paper, an evaluation of the business prospects of time division mul...
Article
Full-text available
Due to the increasing demand in data rates telecom operators are faced with the question of when to upgrade their access network infrastructure toward fiber-to-the-home (FTTH). In this paper a techno-economic study of fiber-to-the-cabinet/very high bit rate digital subscriber line (FTTC/VDSL) and FTTH deployments is performed. The economics and ris...
Conference Paper
The media richness of the services available to the end consumer has had a constant increase rate over the last century. This leads nowadays to the need of Ultra Broadband at home to handle future services such as 3D video that may reach the Gigabit per second. Moreover, beyond the bandwidth increase, the home network capabilities have to evolve in...
Article
Full-text available
Purpose – The purpose of this paper is to show that fixed-mobile convergence (FMC) has gathered much interest in the telecommunications industry lately. Integrated operators (who own both fixed and mobile networks), are keen to exploit FMC benefits in order to save costs and generate new revenues. This paper aims to analyze the effects of converged...
Article
Full-text available
Purpose The purpose of this paper is to carry out a techno‐economic evaluation of the business prospects of Free Space Optical (FSO) technology as an alternative last mile solution Design/methodology/approach The analysis is based on the results from the TONIC tool that takes into account parameters such as network topology, area characteristics,...
Chapter
Digital convergence brings new players in the telecom market and the Mobile Virtual Network Operators (MVNO) are an alternative way for companies to enter the 3G telecom market and start offering services. This chapter aims to contribute to the assessment of the market conditions, architectures and potential for profitable business cases of MVNOs a...
Chapter
Digital convergence brings new players in the telecom market and the Mobile Virtual Network Operators (MVNO) are an alternative way for companies to enter the 3G telecom market and start offering services. This chapter aims to contribute to the assessment of the market conditions, architectures and potential for profitable business cases of MVNOs a...
Chapter
Worldwide Interoperability for Microwave Access (WiMAX) radio networks offer an alternative way to provide fixed, nomadic, and mobile broadband services to businesses and consumers. In these markets, it is both complementing and competing with other access technologies such as asymmetric digital subscriber line (ADSL), wireless local area network (...
Conference Paper
The last years as the traffic and revenues are moving from old PSTN networks and services to new broadband and mobile all IP networks telecom operators are facing major challenges. In order to reduce their losses telecom operators see the fixed mobile convergence (FMC) as the phenomenon capable of shaking the telecom market. In FMC case telecom ser...
Conference Paper
In this paper, a techno-economic evaluation of the business prospects of Free Space Optical (KSO) technology as an alternative last mile solution is carried out and compared to Fiber-to-the-Home/Office (FTTH) and Fiber-to-the-Cabinet (FFTC). The analysis is based on the results from the TONIC tool which takes into account network topology, area cha...
Article
Full-text available
In this paper, a techno-economic evaluation of the business prospects of a wide scale deployment of Free Space Optical (FSO) technology as a last-mile solution is carried out. The evaluation is based on a Techno-Economic (TE) tool which, taking into account network topology, area characteristics, service demand and price evolution forecasts, estima...
Conference Paper
In recent years, fixed-mobile convergence (FMC) has gathered much interest in the telecommunications industry. FMC is expected to offer benefits for network and service operators as well as end-users. Integrated operators (who own both fixed and mobile networks), are keen to exploit these benefits in order to save costs and generate new revenues. H...
Article
Digital convergence brings new players in the telecom market and the Mobile Virtual Network Operators (MVNO) are an alternative way for companies to enter the 3G telecom market and start offering services. This chapter aims to contribute to the assessment of the market conditions, architectures and potential for profitable business cases of MVNOs a...
Chapter
Digital convergence brings new players in the telecom market and the Mobile Virtual Network Operators (MVNO) are an alternative way for companies to enter the 3G telecom market and start offering services. This chapter aims to contribute to the assessment of the market conditions, architectures and potential for profitable business cases of MVNOs a...

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