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Auflistung nach Autor:in "Schmitz, David"

1 - 3 von 3
  • Konferenzbeitrag
    Establishing a Universal Model for Authentication Scenarios based on MNM Srvice Model
    (11. DFN-Forum Kommunikationstechnologien, 2018) Ziegler, Jule Anna; Schmitz, David
    In today’s diversity and heterogeneity of authentication protocols, standards, technologies and frameworks it is hard to compare or at all to combine, e.g., for multi factor authentication, different authentication scenarios. Above all, they all have different understanding or at least perspective on the term “service”. This perspective on a service is normally only a technically one, not really taking into account a full IT service covering the whole life cycle from design, (trust) negotiation, operation to decommissioning. This paper proposes a Universal Authentication Service Model (UASM) in order to describe authentication scenarios in a generic scenario-independent serviceoriented way. Requirements are derived from seven example authentication scenarios. It outlines the
  • Konferenzbeitrag
    perfSONAR: Performance Monitoring in europäischen Forschungsnetzen
    (1. DFN-Forum Kommunikationstechnologien – Beiträge der Fachtagung, 2008) Hanemann, Andreas; Kraft, Stephan; Marcu, Patricia; Reinwand, Jochen; Reiser, Helmut; Schmitz, David; Venus, Verena
    Zur QoS- und SLA-Überwachung sowie zur Vereinfachung der domänenübergreifenden Fehlersuche der Dienste im europäischen Netzverbund GN2 wurde eine föderierte Multi-Domain Monitoring Architektur namens perfSONAR entwickelt. perfSONAR definiert geeignete Metriken und Messverfahren zum Performance Monitoring. Es realisiert eine Architektur, um verschiedenste unabhängig entwickelte Sensoren und Messverfahren in eine übergreifende und umfassende Architektur zu integrieren, einheitliche Messungen durchzuführen, zu analysieren und zu visualisieren. Von der Qualitätssicherung profitieren dabei sowohl große internationale Projekte sowie individuelle Nutzer der europäischen Wissenschaftsnetze.
  • Konferenzbeitrag
    Rethinking multi-layer multi-domain network monitoring
    (5. DFN-Forum Kommunikationstechnologien – Verteilte Systeme im Wissenschaftsbereich, 2012) Liu, Feng; Marcu, Patricia; Schmitz, David; Yampolskiy, Mark
    Accurate and efficient network fault localisation based on monitoring is obviously one of the vital but also formidable tasks for successful network operations. With proliferations of large-scale network services, e.g. Géant E2E links, monitoring and fault localisation across multiple domains with data obtained from different network layers are becoming unprecedentedly important. Many efforts have been invested to tackle the challenges posed by fault localisation, nevertheless, most approaches only suggest partial solutions to the problematics of multi-domain multi-layer aspects. Most importantly, a comprehensive view and deep understanding of the problem is still missing. In this paper, we intend to systematically discuss challenges and their implications posed by fault localisation with consideration on multi-domain and multi-layer monitoring data. The contributions of this paper are manifold: first we identify key research challenges regarding multiple layer monitoring for fault localisation across domains; then based on the identified multiple layer network patterns, we establish comprehensive problem dimensions in a systematic and structured way which holds key to the solution development; finally we propose a formal definitions on information model which captures essential characteristics of multiple network layers across domains.