Managed Dependability in Interacting Systems - TMIT szeminárium (IB019)

Időpont: 
2015. 09. 24. 11:00 - 2015. 09. 25. 10:45

Managed Dependability in Interacting Systems

Időpont: 
2015. 09. 24. 11:00
Hely: 
IB019
Előadó: 
Poul Heegaard
Intézmény: 
Norwegian University of Science and Technology (NTNU)
Kivonat: 

The digital ICT infrastructure is a complex system-of-systems in itself, but also in interaction with other critical infrastructures such as water distributions, transportation (e.g. Intelligent Transport Systems) and Smart Power Grid control. The interacting relationship between the stakeholders is agreed upon in Service Level Agreements (SLAs), which gives guarantees on the non-functional properties of the services, including QoS, QoE, security, and dependability. In order to increase the insight a dependability modelling approach is taken, where the goal is to combine and extend the existing modelling approaches in a novel way. To demonstrate and discuss the consequences of adding more functionality both in the distributed entities serving the primary function, and centralised in the control center, a Smart Grid system example will be presented.

Szeminárium: 
MTA-BME Jövő Internet Kutatócsoport szeminárium
Típus: 
Szakelőadás
CV: 
Poul Heegaard is a professor at the Norwegian University of Science and Technology (NTNU) since 2010. His main research interests are performance and dependability modelling and simulations of communication networks, and now focusing on resource optimisation and management in distributed, autonomous systems in a multi-domain context (aka digital ecosystems). He has previously worked ten years for Telenor (the major Norwegian telecom operator), and ten years for a research institute called SINTEF. He has been the head of Department of Telematics, and now is the head of the QUAM research lab.

The digital ICT infrastructure is a complex system-of-systems in itself, but also in interaction with other critical infrastructures such as water distributions, transportation (e.g. Intelligent Transport Systems) and Smart Power Grid control. These systems are sometimes referred to as "digital ecosystems", and are characterized by self-organization, autonomous subsystems, continuous evolution, scalability and sustainability, providing both economic and social value. Services delivered involve a chain of stakeholders that share the responsibility providing robust and secure services with stable and good performance.  The interacting relationship between the stakeholders is agreed upon in Service Level Agreements (SLAs), which gives guarantees on the non-functional properties of the services, including QoS, QoE, security, and dependability [1], [2].

Modern society depends on the robustness and survivability of ICT infrastructure, so a thorough understanding of the nature of the complexity and inter-dependencies is needed. A quantitative model of a digital ecosystem can offer insights into how management and operations can be conducted within, and coordinated across the different autonomous domains that constitute the global, complex, digital ecosystems. Several challenges must be addressed, and in this talk this will be discussed. In particular, focus on the lack of theoretical foundations to control the societal and per service dependability of this infrastructure, both from a public regulatory position, and from groups of autonomous (commercially) co-operating and partly competing providers.

No foundation is established for optimization, consolidated management and provision of this infrastructure, neither from a public regulatory perspective, nor from groups of autonomous (commercially) co-operating providers positions. A model of an ICT infrastructure must describe the structure and the behaviour of the physical and logical information and network infrastructure, and including the services provided. Furthermore, through the modelling phases, it should be described how resilience engineering [2] can be applied to manage the robustness and survivability of the ICT infrastructure ecosystem.

Refs:

[1] Tesfaye A. Zerihun, Bjarne E. Helvik, Poul E. Heegaard and John Krogstie: “Quantitative Modelling of Digital Ecosystems”. 
ERCIM News 102 (June 2015), http://ercim-news.ercim.eu/en102/special/quantitative-modelling-of-digital-ecosystems

[2] Poul E. Heegaard, Bjarne E. Helvik, Gianfranco Nencioni, Jonas Wäfler: “Managed dependability in interacting systems”.  Work in progress.