Open Access Open Access  Restricted Access Subscription or Fee Access

Fault Tree Analysis for Safety Critical Network Infrastructure

P. Vaishnavi, Rajesh Prasanna


A hybrid framework to perform reliability analysis for Safety Critical Network Infrastructure (SCNI) is developed. A Campus Wide Area Network (CWAN) that provides web and other services connectivity to several departments forms a model of SCNI backbone for this study. In order to deliver a high performance network with efficient management, trouble shooting environment, and scalable topology, a multi-tier approach has been adopted. This SCNI model has three layers viz., core layer, distribution layer, and access layer. For the purpose of carrying out reliability analysis, the hardware components and software functions are represented by Reliability Block Diagrams (RBD). The input to each RBD forms the test criteria while, corresponding output from each RBD represents the response of each hardware component or, software function to the test criteria. The FTA goes further down by trying to identify the root cause of each component's failure.


SCNI, RBD, Reliability Analysis, FTA

Full Text:



P.Juan, “Designing safety critical systems: A Convergence of Technologies”, MISC, 1997.

N.Leveson,D.Nicolas, “Engineering resilience into safety critical systems”, 2006.

H.Robidoux, “Automated modeling of dynamic reliability block diagrams using colored petri nets”, IEEE Transactions on Systems, Man, cybernetics, 2010

W.Wang , J.Loman., ”Reliability block diagram simulation techniques applied to IEEE std.493 standard network”, IEEE transactions on industry applications, May 2004, vol 40, pp.3.

P.Veitch, D.Johnson, “ATM Network resilience”, IEEE Network, 1997.

S.Dharmaraja, “Reliability and Survivability Analysis for UMTS networks: An analytical approach”, IEEE Transactions on network and service management, sep 2008,vol.5.

J.Musa , “Introduction to Software Reliability Engineering and Testing”, Proceedings of the Eight International Symposium on Software Reliability Engineering, 1997, pp 334-337.


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.