Christos Verikoukis

Christos Verikoukis
University of Patras | UP · Department of Computer Engineering and Informatics

Doctor of Philosophy

About

489
Publications
87,245
Reads
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7,219
Citations
Additional affiliations
January 2007 - present
University of Barcelona
Position
  • Professor (Associate)
February 2004 - October 2021
Telecommunications Technological Centre of Catalonia
Position
  • Senior Researcher

Publications

Publications (489)
Article
Smart homes that contain renewable energy sources, storage systems, and controllable loads will be key components of the future smart grid. In this article, we develop a reinforcement-learning (RL)-based scheme for the real-time energy management of a smart home that contains a photovoltaic system, a storage device, and a heating, ventilation, and...
Preprint
Full-text available
Service providers highly rely on network softwariza-tion for addressing the demanding use cases of the 5G verticals. In order for the 5G vertical scenarios to be seamlessly executed, where the coverage should be provided in large areas, the required infrastructure capacity and availability can only be supported by cross-operator cooperation. In thi...
Preprint
Full-text available
Artificial intelligence (AI)-driven zero-touch massive network slicing is envisioned to be a disruptive technology in beyond 5G (B5G)/6G, where tenancy would be extended to the final consumer in the form of advanced digital use-cases. In this paper, we propose a novel model-free deep reinforcement learning (DRL) framework, called collaborative stat...
Preprint
To harness the full potential of beyond 5G (B5G) communication systems, zero-touch network slicing (NS) is viewed as a promising fully-automated management and orchestration (MANO) system. This paper proposes a novel knowledge plane (KP)-based MANO framework that accommodates and exploits recent NS technologies and is termed KB5G. Specifically, we...
Chapter
In line with the virtual network function (VNF) paradigm, network functions are abstracted and relocated from dedicated appliances to generic servers, thus providing the enabler for savings in terms of total cost of ownership (TCO). In fact, hardware overprovisioning induced costs can be saved due to the on-demand capability of scaling up and down...
Article
The evolution of Software-Defined Networking (SDN) and Network Function Virtualization (NFV) in the telecommunications industry have intensified the issues of network management at large scales. Dynamic service orchestration and adaptive resource allocation became a necessity for network operators to manage the rapid growth of users and data-intens...
Article
Full-text available
Next-Generation (NG) mobile networks are expected to revolutionize wireless communication systems, facilitating the deployment of critical applications with stringent Quality of Service (QoS) requirements. Multi-access Edge Computing (MEC) and Radio Access Network (RAN) slicing are considered vital mechanisms of upcoming NG systems as they allow cr...
Conference Paper
Artificial intelligence (AI)-driven zero-touch massive network slicing is envisioned to be a disruptive technology in beyond 5G (B5G)/6G, where tenancy would be extended to the final consumer in the form of advanced digital use-cases. In this paper, we propose a novel model-free deep reinforcement learning (DRL) framework, called collaborative stat...
Conference Paper
Full-text available
Scalability and sustainability are the corner stones to unleash the potential of beyond fifth-generation (B5G) ultra-dense networks that are expected to handle massive and heterogeneous services. This implies that the transport of the underlying raw monitoring data should be minimized across the network, and urges to bring the analysis functions cl...
Article
Presents information and current topics of interest to the global communications industry.
Article
Full-text available
Network slicing (NS) is a key enabler of the 5G and beyond network architectures, allowing multiple dedicated logical networks with selected functionality to be executed on top of a common infrastructure. At the radio access network, novel flexibility paradigms and dynamic response to wireless channel variations are necessary for any NS solution. I...
Article
Full-text available
Scalable and sustainable AI-driven analytics are necessary to enable large-scale and heterogeneous service deployment in sixth-generation (6G) ultra-dense networks. This implies that the exchange of raw monitoring data should be minimized across the network by bringing the analysis functions closer to the data collection points. While federated lea...
Article
The COVID-19 pandemic has had an impact across the globe. This includes the many lives lost and the severe disruption to economies and daily lives. Researchers in a variety of fields have been motivated to use their expertise to help address the many challenges of this on-going pandemic. Communication and Networking researchers are among these. Com...
Article
Full-text available
A key enabler for both scalability and sustainability in beyond 5G (B5G) network slicing consists on minimizing the exchange of raw monitoring data across different domains. This is achieved by bringing the analysis functions closer to the data collection points. To this end, we introduce in this paper statistical federated learning (SFL) provision...
Article
Full-text available
Network Function Virtualization (NFV)-based 5G networks deliver specific services to a set of users through the creation of Service Function Chains (SFCs), which are composed of a number of Virtualized Network Functions (VNFs) interconnected via a set of virtual links (vLinks). VNFs consume computational resources of the network's servers, while vL...
Conference Paper
Full-text available
In this paper, we develop a reinforcement learning-based scheme for the real-time energy management of a smart home that contains a photovoltaic-energy storage system. The objective of the proposed scheme is to minimize the electricity supplying cost by appropriately scheduling the storage system on a daily basis. The problem is formulated as a Mar...
Article
Full-text available
Big Data (BD) platforms have a long tradition of leveraging trends and technologies from the broader computer network and communication community. For several years, dedicated servers of homogeneous clusters were employed as the dominant paradigm in BD networks. In recent years, the BD landscape has changed, porting different deployment architectur...
Chapter
5G mobile networks will be soon available to handle all types of applications and to provide service to massive numbers of users. In this complex and dynamic network ecosystem, end-to-end performance analysis and optimization will be key features in order to effectively manage the diverse requirements imposed by multiple vertical industries over th...
Chapter
The paper discusses a novel architecture proposed within the scope of the ongoing MonB5G EU-funded project. Considering a multiplicity of challenges towards realizing an effective network slice management in modern 5G networks, our work considers explicitly the context promoted by the Zero-touch network and Service Management (ZSM) framework, asses...
Article
The 5G mobile network is embracing new technologies to keep providing network subscribers with a high Quality of Service (QoS). However, this has become increasingly difficult in the urban landscape as more devices are being connected and each device is requesting increasing amounts of data. Network operators rely on the small cell technology to ma...
Conference Paper
To harness the full potential of beyond 5G (B5G) communication systems, zero-touch network slicing (NS) is viewed as a promising fully-automated management and orchestration (MANO) system. This paper proposes a novel knowledge plane (KP)-based MANO framework that accommodates and exploits recent NS technologies and is termed KB5G. Specifically, we...
Article
Presents information and current topics of interest to the global communications industry.
Preprint
Full-text available
NarrowBand Internet of Things (NB-IoT) is an emerging cellular IoT technology that offers attractive features for deploying low-power wide area networks suitable for implementing massive machine type communications. NB-IoT features include e.g. extended coverage and deep penetration for massive connectivity, longer battery-life, appropriate through...
Article
Full-text available
NarrowBand Internet of Things (NB-IoT) is an emerging cellular IoT technology that offers attractive features for deploying low-power wide area networks suitable for implementing massive machine type communications. NB-IoT features include e.g. extended coverage and deep penetration for massive connectivity, longer battery-life, appropriate through...
Article
Full-text available
5G mobile networks are envisioned to substantiate new vertical services with diverse performance requirements. Slicing in the radio access network (RAN) promises an efficient solution for these diversified needs of 5G networks, which foresees the separation of the base station functionality between the central unit (CU) and the distributed remote r...
Article
Full-text available
Future mobile networks will offer high data rates based on high-capacity fronthaul. Current fronthaul design has two main components that communicate via the common public radio interface and fiber links, i.e., remote units (RUs) that implement simple signal processing and centralized baseband units (CBBUs) in high power-consuming data centers that...
Preprint
Artificial intelligence (AI)-driven zero-touch network slicing is envisaged as a promising cutting-edge technology to harness the full potential of heterogeneous 5G and beyond 5G (B5G) communication systems and enable the automation of demand-aware resource management and orchestration (MANO). In this paper, we tackle the issue of B5G radio access...
Preprint
Artificial intelligence (AI)-driven zero-touch network slicing (NS) is a new paradigm enabling the automation of resource management and orchestration (MANO) in multi-tenant beyond 5G (B5G) networks. In this paper, we tackle the problem of cloud-RAN (C-RAN) joint slice admission control and resource allocation by first formulating it as a Markov de...
Chapter
Full-text available
Electric Vehicles (EVs) are considered as one of the most promising ways to alleviate climate change mainly through the reduction of the dependence on fossil fuels, as well as of the emissions caused by fuel combustion. However, the vast adoption of EVs in urban areas may challenge the efficiency of the power grid due to the significant amounts of...
Conference Paper
Artificial intelligence (AI)-driven zero-touch network slicing (NS) is a new paradigm enabling the automation of resource management and orchestration (MANO) in multi-tenant beyond 5G (B5G) networks. In this paper, we tackle the problem of cloud-RAN (C-RAN) joint slice admission control and resource allocation by first formulating it as a Markov de...
Conference Paper
Full-text available
Network Slicing (NS) represents a key technology enabler for advanced connectivity and data processing tailored to customers’ specific requirements. While significant progress has already been achieved for Core NS, Radio Access Network (RAN)slicing still presents limitations in terms of sharing infrastructure,Service Level Agreement (SLA) guarantee...
Article
Full-text available
Mobile applications are advancing toward higher network and compute requirements, which are similar to the requirements of server applications. Users prefer to perform their tasks on the go from mobile devices instead of stationary desktop and server systems. Modern mobile applications limit mobile battery times as charging is lost quickly due to h...
Conference Paper
5th Generation (5G) communication systems are expected to undergo significant advances, with optical-wireless technologies being at the forefront of system design addressing key requirements targeting high performance, versatility and cost-effectiveness. The EU-funded EXPLOR project aims to develop a comprehensive modular platform with experimental...
Article
In this work, we analytically study the performance of an in-band and self-fronthauling millimeter-wave Cloud-Radio Access Network (C-RAN). By considering a stochastic-geometry approach for the modeling of the position and number of Baseband Units (BBUs), Remote Radio Heads (RRHs), and mobile terminals (MTs), we provide the following three-fold con...
Article
Full-text available
Telemedicine, or the ability granted to doctors to remotely assist patients has been greatly benefited by advances in IoT, network communications, Machine Learning and Edge/Cloud computing.With the impeding arrival of 5G, virtualized infrastructures and cloud-native approaches enable the execution of unprecedented procedures during such patient/doc...
Preprint
NarrowBand Internet of Things (NB-IoT) is an emerging cellular IoT technology that offers attractive features for deploying low-power wide area networks suitable for implementing massive machine type communications. NB-IoT features include e.g. extended coverage and deep penetration for massive connectivity, longer battery-life, appropriate through...
Preprint
NarrowBand Internet of Things (NB-IoT) is an emerging cellular IoT technology that offers attractive features for deploying low-power wide area networks suitable for implementing massive machine type communications. NB-IoT features include e.g. extended coverage and deep penetration for massive connectivity, longer battery-life, appropriate through...
Article
Full-text available
The Internet of Things (IoT) ecosystem, as fostered by fifth generation (5G) applications, demands a highly available network infrastructure. In particular, the internet of vehicles use cases, as a subset of the overall IoT environment, require a combination of high availability and low latency in big volumes support. This can be enabled by a netwo...
Article
As technology progresses, cars can not only be considered as a transportation medium but also as an intelligent part of the cellular network that generates highly valuable data and offers both entertainment and security services to the passengers. Therefore, forthcoming 5G networks are said to enhance Ultra-Reliable Ultra-Low-Latency that will allo...
Article
Full-text available
Network slicing is a powerful tool to harness the full potential of 5G systems. It allows verticals to own and exploit independent logical networks on top of the same physical infrastructure. Motivated by the emergence of the big data paradigm, this article focuses on the enablers of big-databased intelligent network slicing. The article starts by...
Article
The increase in the world's population has led to a massive rise in human consumption of the planet's natural resources, well beyond their replacement rate. Traditional recycling concepts and methods are not enough to counter such effects. In this context, a circular economy (CE), that is, a restorative and regenerative by-design economy, can refor...
Conference Paper
In this paper, we investigate the concept of OPEX-limited resource provisioning as a key component in fifth generation (5G) radio access networks (RAN) slicing. The different RAN slices’ tenants (i.e. logical operators) are dynamically allocated isolated portions of physical resource blocks (PRBs), baseband processing resources and backhaul capacit...
Chapter
Full-text available
Next generation, i.e., fifth generation (5G), networks will leverage both fiber and wireless (FiWi) technology to meet the challenging 5G traffic demands. Moreover, a Cloud-Radio Access Network (C-RAN) architecture will be mainly adopted, which places the BaseBand Units (BBUs) at centralized locations, thus offering cost-efficient energy supply and...
Chapter
Wireless Sensor Networks (WSN) are key components of the Internet of Things (IoT) revolution. WSN nodes are in general battery-powered, thereby and efficient usage of their energy budget is of paramount importance to avoid performance degradation in IoT applications. To this end, this chapter proposes techniques to manage the WSN nodes’ power consu...
Article
The articles in this special section focuses on blockchain for scalable Internet of Things (IoT) management, access, and accountability. The articles highlight new blockchain architectures and techniques that can be leveraged to enable scalable management, access and accountability of massive numbers of IoT devices to effectively support various Io...
Conference Paper
Full-text available
5G New Radio's (NR) spectrum expansion towards higher bands, although critical towards achieving the envisioned 5G capacity requirements, creates the need for installing a very large number of Access Points (APs), which asserts tremendous capital burden on the Mobile Network Operators. Current centralization solutions such as the Cloud Radio Access...
Article
Full-text available
In this paper, we address the issue of resource provisioning as an enabler for end-to-end dynamic slicing in software defined networking/network function virtualization (SDN/NFV)-based fifth generation (5G) networks. The different slices’ tenants (i.e. logical operators) are dynamically allocated isolated portions of physical resource blocks (PRBs)...
Article
As networks have continued to gain popularity throughout the 1980s and well into today, communication technologies have taken a critical number of major t wists and turns, with a wide variety of wireless technologies, protocols, services, and configurations developed and deployed. There have been murmurs of network functions virtualization and soft...
Chapter
The innovative capabilities of 5G technologies, such as software‐defined networking (SDN) and network function virtualization (NFV), open up a variety of possibilities for improved and novel service provisioning. Nevertheless, technologies such as SDN expand the attack surface of the communication infrastructure, thus necessitating the introduction...