NDLI: A Decomposition-Based Modeling Framework for Complex Systems

Content Provider	IEEE Xplore Digital Library
Author	Lollini, P. Bondavalli, A. di Giandomenico, F.
Copyright Year	1963
Abstract	Stochastic model-based approaches are widely used for performability evaluation of complex software/hardware systems. Many techniques have been developed to mitigate the complexity of the associated models, but most of them are domain-specific, and they support the analysis of a limited class of systems. This paper provides a contribution in the definition of a general modeling framework that adopts three different types of decomposition techniques to deal with model complexity. First, a functional decomposition is applied at the system-level, thus identifying a set of subsystems, called entities, each one performing a function with respect to the validation objectives. The entities can interact with each other through some dependency relations that state how the behavior of each entity can affect the other(s). Then a temporal decomposition is used to divide the system's lifetime in a sequence of phases such that two consecutive phases have at least one different dependency relation. Last, a model-level decomposition produces a set of separate sub-models that can be solved in isolation, passing some intermediate results between them, if and when required. This modeling framework has been applied to analyze a General Packet Radio Service (GPRS) mobile telephone system. The purpose of this case-study is to demonstrate the applicability of the framework, in terms of its computational complexity, and the accuracy of the obtained results. The proposed approach provides results sufficiently accurate, though it induces some acceptable approximation. Moreover, it significantly reduces the computational complexity with respect to solving the whole non-decomposed model, and shows only a slight increase in complexity with respect to the ad-hoc solution technique specifically developed for the GPRS case-study.
Sponsorship	IEEE Reliability Society
Starting Page	20
Ending Page	33
Page Count	14
File Size	581980
File Format	PDF
ISSN	00189529
Volume Number	58
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bonding Packet radio networks Ground penetrating radar Stochastic systems Computational complexity Quality of service Phased arrays Performance evaluation Software performance Software systems phased mission systems Dependency relations general packet radio service network modeling framework
Content Type	Text
Resource Type	Article
Subject	Safety, Risk, Reliability and Quality Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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