Anilton Salles Garcia

IT service management and governance modeling an ITSM Configuration process: A foundational ontology approach

Information Technologies (IT) have become strategic and essential for business development. In this context, IT management has evolved to business driven IT management solutions. Following this evolution, Configuration Management process plays a key role by providing accurate IT information to other agents such as business, people, processes, tools and technologies. In this sense, agents interoperability has been characterized as a major research challenges in network and services management. This paper presents a proposal of IT Service Configuration Management domain ontology. The purpose of this ontology is to provide a conceptual model of this domain committed to maximize expressivity, clarity and truthfulness of the concepts belonging to it.

Ontological evaluation of the ITU-T Recommendation G.805

The ITU-T Recommendation G.805 is a telecommunication standard providing a generic functional architecture for transport networks and serving as the basis for several others networking and management specifications. Due to its fundamental importance, it is essential for this recommendation to be clear, complete and unambiguous, thus eliminating the spread of problems for all its using documents. This article employs an ontology-based systematic evaluation to verify the aforementioned characteristics on the ITU-T G.805 standard current documentation. Moreover, it discusses a number of ontological problems identified by this evaluation. Finally, the article illustrates with fragments of a well-founded reference model for the same domain, how these identified problematic situations can be addressed in a representation artifact.

OOTN -an ontology proposal for optical transport networks

This paper presents the OOTN - ontology for optical transport networks: a computational ontology proposal for optical transport networks based on the ITU-T G.805 and G.872 recommendations. It shows the most relevant issues found during the modeling process and presents a case study where the classical concepts of VTD and RWA applications have been mapped to OOTN.

On the importance of truly ontological distinctions for standardizations

Standards are documents that aim to define norms and common understanding of a subject by a group of people. In order to accomplish this purpose, these documents must define its terms and concepts in a clear and unambiguous way. Standards can be written in two different ways: by informal specification (e.g. natural language) or formal specification (e.g. math-based languages or diagrammatic ones). Remarkable papers have already shown how well-founded ontology languages provide resources for the specifications author to better distinguish concepts and relations meanings, resulting in a better specification. This paper has the objective to expose the importance of truly ontological distinctions for standardizations. To achieve this objective, we evaluate a math-based formal specification, in Z notation, using a well-founded ontology language for a telecommunications case study, the ITU-T Recommendation G.805. The results confirm that truly ontological distinctions are essential for clear and unambiguous specifications. Standards must define its terms and concepts in a clear and unambiguous way.Standards can be written in informal specification or formal specification.Well-founded ontology languages provides resources for distinction of meanings.A Z notation formal specification is evaluated for a telecommunications case study.Results confirm that ontological distinctions are vital for unambiguous standards.

Zone based Spectrum Assignment in Elastic Optical Networks: A fairness approach

We propose a Routing and Spectrum Assignment algorithm to address Spectrum Fragmentation, and unfairness among different rated requests in Elastic Optical Networks. Results show that our method achieves desired fairness and reduces blocked bandwidth ratio.

Well-Founded IT Architecture Ontology: An Approach from a Service Continuity Perspective

This paper presents an ontology model of the IT architecture to corporations that aim to set up an architecture made to the service continuity. This model describe the IT components, the IT Service Continuity components and other entities, and the relationship between them. The article is based in two pillars: the internationals standards guiding the IT service continuity, specially the PAS 77:2006, and the Unified Foundation Ontology (UFO) in order to build a well-founded ontology. The ontology model is built using the Conceptual Model Language OntoUML with the objective of preserving the ontologic prerogatives defined in the UFO. At last, this paper will show an ontologic evaluation of the IT architecture described in the PAS 77:2006 standard.

Implementation and application of a well-founded configuration management ontology

Information technology (IT) is becoming essential for organizations. In this context, IT management has evolved to include IT service management and governance, towards business driven IT management paradigms. Thus, the alignment between IT and business has been regarded as one of the leading factors to the effectiveness of such paradigms. Furthermore, contributions from management activities automation are mentioned. Following these evolution, configuration management plays a key role by providing accurate IT information to all related to management. However, due to this closed relationship among all management agents, interoperability between these agents has been characterized as one of the main research challenges in network and service management. This paper extends the contributions of, designing and implementing the conceptual models in implementation models. Thus, the main goal of this paper is to show how concepts modeled by ontologies can be implemented and applied in a computational system, allowing the conception of automated and semantically interoperable management solutions.

ElasticO++: An Elastic Optical Network Simulation Framework for OMNeT++

Abstract In this work, we present ElasticO++: an Elastic Optical Network Simulation Framework for OMNeT++. A tool created to enable testing in a whole range of routing, modulation, spectrum assignment, defragmentation algorithms, parameters, and topologies. To the best of our knowledge, the proposed framework is the first software available capable of working with fragmentation and defragmentation in dynamic network scenarios. The flexibility available on the proposed tool allows both academia and industry develop new algorithms and techniques for Elastic Optical Networks. The framework provides a set of instruments that allow rapid implementation, testing, and analysis of new algorithms; and enables a common and well-controlled environment for comparing existing algorithms. In its current version, the framework comes with ten traditional already implemented algorithms, which can be used standalone or in combination with new ones. This work describes the architecture and main features, which makes our framework unique. Additionally, we present a case study to demonstrate some of the proposed framework capabilities.

A methodology for performance management of networks

This paper proposes a proactive performance management methodology, based on performance analysis, capacity planning and discrete events simulation tools. The main objective is to provide a practical framework to aid the network operators and managers to keep up the network performance. A case study based on the application of proposed methodology for a large-scale enterprise network and its results are presented.

Towards Semantic Interoperability in Information Technology: On the Advances in Automation

Automation has, over the years, assumed a key role in various segments of business in particular and, consequently, society in general. Derived from the use of technology, automation can reduce the effort spent on manual work and the realization of activities that are beyond human capabilities, such as speed, strength and precision. From traditional computing systems to modern advances in information technology (IT), automation has evolved significantly. At every moment a new technology creates different perspectives, enabling organizations to offer innovative, low cost or custom-made services. For example, advents such as artificial intelligence have enabled the design of intelligent systems capable of performing not only predetermined activities, but also ones involving knowledge acquisition. On the other hand, customer demand has also evolved, requiring higher quality, lower cost or ease of use. In this scenario, advances in automation can provide innovative automated services as well as supporting market competition in an effective and efficient way. Considering the growing dependence of automation on information technology, it is observed that advances in automation require advances in IT.