Catalin Meirosu's research while affiliated with Ericsson and other places

Publications (48)

Article
Energy efficiency and emissions awareness are core capabilities for sustainable and lower cost distributed cloud networks. In this context, metrics are fundamental for comparison and management purposes, along with the methods and tools which support such metrics’ capture and analysis. However, prior works on green metrics and tools have presented...
Article
Network function virtualization (NFV) allows to model network services as graphs interconnecting virtual network functions (VNFs), which may include nested VNFs, modeled as subgraphs of VNFs or end points. To query the performance data of network services modeled as abstract and high-level graphs is challenging because of the recursivity of the NFV...
Article
Full-text available
Although there is consensus that software defined networking and network functions virtualization overhaul service provisioning and deployment, the community still lacks a definite answer on how carrier-grade operations praxis needs to evolve. This article presents what lies beyond the first evolutionary steps in network management, identifies the...
Article
DevOps has an important role to play in meeting 5G networks' requirements for faster time to customer in an environment characterized by widely distributed resources and tight constraints on service quality. In collaboration with the open source and academic communities, we have investigated how best to address 5G challenges using DevOps and a gene...
Article
The need to manage the energy consumption of network infrastructure has been addressed by a significant body of work in recent years. In general, energy management capabilities were developed independently and optimized for particular network layers and node features. The interaction between multiple such green capabilities when deployed simultaneo...
Conference Paper
As Software Defined Networks (SDN) deployments are reaching mainstream, network performance becomes a key concern for success. Service Providers (SPs) rely on network management capabilities, such as packet loss monitoring, to observe the network status and thereby facilitate service-level agreements. On one hand, SPs seek tools providing greater v...
Article
Full-text available
This report presents the results of the UNIFY Service Provider (SP)-DevOps activities. First, we present the final definition and assessment of the concept. SP-DevOps is realized by a combination of various functional components facilitating integrated service verification, efficient and programmable observability, and automated troubleshooting pro...
Conference Paper
The growing energy consumption has become a major concern for network service providers not only to reduce operational expenses but also to minimize environmental problems related to the high energy expenditure. In this regard, the assessment of the energy consumed has become an important task to maximize the energy efficiency, and thus, offer diff...
Conference Paper
In Network Function Virtualization (NFV), a network service is created by combining interconnected virtual network functions (VNF), which may include nested VNFs or end points. Querying the performance of a high-level, abstract network service is challenging due to the recursivity of the NFV architecture and the elasticity and dynamicity provided b...
Conference Paper
Passive monitoring of network performance parameters is experiencing a revival due to widespread adoption of virtualization and software-based implementation of network functions. Timestamping is one of the most challenging operations needed for passively monitoring network traffic performance parameters such as latency and jitter. We develop a set...
Article
Full-text available
This report provides an understanding of how the UNIFY Service Provider (SP)-DevOps concept can be applied and integrated with a combined cloud and transport network NFV architecture. Specifically, the report contains technical descriptions of a set of novel SP-DevOps tools and support functions that facilitate observability, troubleshooting, verif...
Article
Full-text available
This report presents a first sketch of the Service Provider DevOps concept including four major management processes to support the roles of both service and VNF developers as well as the operator in a more agile manner. The sketch is based on lessons learned from a study of management and operational practices in the industry and recent related wo...
Conference Paper
Technology trends such as Cloud, SDN, and NFV are transforming the telecommunications business, promising higher service flexibility and faster deployment times. They also allow for increased programmability of the infrastructure layers. We propose to split selected monitoring control functionality onto node-local control planes, thereby taking adv...
Article
Green sustainability-oriented features have become common in network nodes and protocols. Running a network in an energy-efficient way is an important concern of network operators and datacenter networks. The implementation and coordination of the myriad of existing network features poses a challenging task. The energy efficiency capabilities must...
Article
The energy demand for operating Information and Communication Technology (ICT) systems has been growing, implying in high operational costs and consequent increase of carbon emissions. Both in datacenters and telecom infrastructures, the networks represent a significant amount of energy spending. Given that, there is an increased demand for energy...
Conference Paper
A significant number of green, energy-saving network protocols have been invented in recent years in response to demand for reducing the amount of energy consumed by network infrastructure. In this paper, we report on the difficulties we encountered when building an SDN environment that could emulate energy saving protocols operating at different l...
Article
The second installment of the Feature Topic on network and service virtualization takes off from where Part I concluded: network function virtualization (NFV) deployment and operation. We are currently observing a transition from software-defined networking (SDN) focusing solely on programming packet-switching network elements based on lower-layer...
Article
The introduction of software-defined networking (SDN) and network function virtualization (NFV) has altered, in a wholesale manner, the way to plan for network infrastructure evolution in the forthcoming decade. This Feature Topic aims to provide a concise reference entry point to a wider audience with respect to carrier-grade networking and servic...
Article
Full-text available
Carrier networks are faced with continuous transformations of their technology platforms in order to keep up with the changing customer demands. This paper will show how the transition from stovepipe networks to layered architectures enabled the shift to a future network design based on a network operation system (NetOS) operating the ICT fabric co...
Conference Paper
The energy demand for operating Information and Communication Technologies is growing, implying in high operational costs and consequent carbon emissions. Both in datacenters and in telecom infrastructures, the networks represent a significant amount of energy spending. This implies in an increased demand for energy efficiency, and several function...
Conference Paper
Detecting and localizing performance degradations is a difficult problem that increases in importance as telecom network transition to all-packet equipment. Operators require solutions that are accurate in localization and do not impose large additional costs in terms of hardware deployment or manual labor for operations. Existing commercial soluti...
Conference Paper
Full-text available
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 and research communities lately. However, NSC is largely undefined in the peer-reviewed literature. In fact, a literature review reveals th...
Conference Paper
Full-text available
Telecom providers struggle with low service flexibility, increasing complexity and related costs. Although "cloud" has been an active field of research, there is currently little integration between the vast networking assets and data centres of telecom providers. UNIFY considers the entire network, from home networks up to data centre, as a "unifi...
Conference Paper
Energy efficiency features are being integrated in network protocols and management systems. Simulations can provide input on how a particular algorithm would perform in different network conditions. However, building an environment that is able to comprehensively account for interactions between different network functions is difficult. A combinat...
Chapter
Este curso tem como objetivo apresentar, de forma teórica e prática, como utilizar técnicas e mecanismos disponíveis para o refinamento de políticas a partir do nível de redes, considerando parâmetros de desempenho e eficiência energética, dentro do contexto gerenciamento de TIC ou mais especificamente de redes baseado em políticas (formação de nov...
Conference Paper
This paper describes the foundation of a novel network fault localization algorithm based on active network measurements and probabilistic inference. A fault condition could be an unacceptable large delay or packet loss rate. The solution is computationally efficient, autonomic in nature and provides the operator with a probability mass distributio...
Conference Paper
Sustainable computer networking approaches adapt network node power states dynamically in response to traffic demand. This scenario imposes new challenges to the way the network resilience is evaluated based on reliability and availability metrics. The traditional assessments of reliability and availability based on Markov models or the Cut-Set and...
Conference Paper
Policy-Based Systems have been proposed as a flexible and robust solution for policy enforcement in different sectors of ICT (Information and Communication Technology) infrastructure. Since networking systems present high degrees of electrical energy consumption, companies that provide ICT services or network connections need to work on energy-effi...
Conference Paper
Considering the increasing importance of carbon free networking solutions, several energy-efficient networking systems have been proposed and evaluated in literature. One significant challenge is how to encompass actions targeting energy savings and possible corresponding degradations in network QoS (Quality of Service). This paper presents an ener...
Patent
)According to a first aspect of the present invention there is provided a method for managing a network comprising a plurality of nodes connected by communication links. The method comprises detecting network traffic at each node, and determining the availability of each node. The availability is related to the probability of a node being able to f...
Conference Paper
This paper presents a system for automating and integrating the provisioning and validation of Ethernet point-to-point connectivity services over transport networks. The provisioning is based on standard control plane functionality. The service performance is validated using the BART tool for measuring capacity, extended to provide Ethernet measure...
Article
Future Internet, inherent traffic and network management as well as the corresponding business aspects are topics of intensive research activity. The combination of those areas is a main focus of Inherent Network Management (INM) as a management framework based on distributed, self-organizing and autonomous approaches to address new challenges in a...
Conference Paper
Future Internet, Inherent Network Management (INM) and business aspects such as OPEX/CAPEX are topics of vivid research activity for quite some time. This paper focuses on the combination of the three areas, showing what is expected from recent Future Internet activities based on experience in the 4WARD project founded by the European Union. We bri...
Conference Paper
Full-text available
The information-centric paradigm has been recently proposed for the design of future networking systems. A key requirement for realising such systems is having mechanisms that provide efficient, scalable and accurate information search. In this paper, we present solutions for both one-time and continuous searches. Our solution for one-time searches...
Conference Paper
Full-text available
Network management has been traditionally considered in the last stages of the design and development cycles of network technology. The typical modus operandi relies mostly on networkers that manually configure active elements, troubleshoot problems as they arise and reconfigure equipment accordingly. In fact, we note that several initiatives in th...
Conference Paper
Full-text available
Recent endeavors in addressing the challenges of the current and future Internet pursue a clean slate design methodology. Simultaneously, it is argued that the Internet is unlikely to be changed in one fell swoop and that its next generation requires an evolutionary design approach. Recognizing both positions, we claim that cleanness and evolution...
Article
In-network management (INM) is a new paradigm for the management of the future Internet that is based on the principles of decentralization and self-organization. Its goal is to overcome the limitations of traditional network management and to achieve scalable and robust management systems with low complexity for large-scale, dynamic network enviro...

Citations

... DevOps aims to unify software development and software operations to reap synergetic benefits. As per [9,10], this is achieved through: ...
... At the same time, DRL-based methods to solve various RA problems have attracted much attention [16]- [18]. In [19], a ML algorithm for extracting feature of data traffic in NFVcloud network for predicting computation and demands of resources is deployed. In [20], DRL based mechanism with Markov Decision Process (MDP) is proposed for reducing congestion probability and also choosing transmission path for routing and traffic engineering. ...
... Energy efficiency is a crucial characteristic for the devices and the cloud platform. As presented by [43], the cloud computing metrics use the amount of data traffic to calculate the Key Performance Indicators (KPIs) related to energy efficiency and Greenhouse Gases (GHG) emissions. ...
... Moradi, F., et al. [112] Containers 2017 Tangari, G., et al. [113] Decentralized SDN 2017 Shah, S. Y., et al. [114] Cloud applications 2017 Perdices, D., et al. [115] Network Performance 2018 Sanz, I. J., et al. [116] SFC performance 2018 ...
... Yu et al. [12] proposed a delay monitoring framework SLAM, which triggers control messages by actively sending probe packets, and analyzes the time when the messages arrive at the controller to obtain the delay. Fu et al. [13] proposed an efficient passive lightweight predictor EPLE, which uses the Openflow protocol for detecting packet loss. The passive detection method reduces the overhead. ...
... The groundbreaking paradigm called Software-Defined Networking (SDN) now offers a softwarized and centralized network management approach that facilitates and automates network (re-)configuration by splitting control and data planes. This mechanism can be employed to automatically and dynamically change the configuration rules of the main network devices that are used in SDN networks, i.e., SDN switches [5], so dynamically changing the enforced security policies, e.g., in reaction to cyber-attacks [6]. ...
... Jinlai Xu et al. implemented a framework for resource sharing to maintain contract of resource sharing with the data centers for geo-distributed clouds for defined time intervals [36]. Viviane T. Nascimento et al. proposed a model to show customer's contract data, least energy costs, and allocating the services based on search items for better usage of energy [37]. Qiushi Wang et al. developed a speedy and efficient strategy to calculate instances for each pricing option on hourly distribution basis [38]. ...
... [22]. This method integrates three different protocols that operates at different network layers: Adaptive Link Rate (ALR) [24], which is a chip-level protocol, Synchronized Coalescing (SC) [25], which is active at node-level, and Sustainability-oriented Network Management System (SustNMS) [26], which operates at the network level. ALR changes data rates according to the traffic load of the network, whereas SC protocol works on every part within all the network devices. ...
... Currently, several tools [25] are available for monitoring VNFs. Some tools such as HSA (Header Space Analysis), Anteater, and VeriFlow test networks by verifying the configuration of the network. ...
... Their development was triggered by the need to scale such capacity in a cost-efficient way with low human involvement and enabled largely by moving from monolithic software architecture to service oriented architectures of which microservices are an example [29]. Similar automation approaches have been proposed for networking, including cellular networks, and is referred to as Networking DevOps [30]. DevOps-inspired automation for smart devices, especially the ones falling into the category of embedded systems have also been recently proposed [31], [32] and are commercially available as surveyed and compared in [33]. ...