Computing scores of forwarding schemes in switched networks with probabilistic faults Conference Paper


Author(s): Avni, Guy; Goel, Shubham; Henzinger, Thomas A; Rodríguez-Navas, Guillermo
Title: Computing scores of forwarding schemes in switched networks with probabilistic faults
Title Series: LNCS
Affiliation IST Austria
Abstract: Time-triggered switched networks are a deterministic communication infrastructure used by real-time distributed embedded systems. Due to the criticality of the applications running over them, developers need to ensure that end-to-end communication is dependable and predictable. Traditional approaches assume static networks that are not flexible to changes caused by reconfigurations or, more importantly, faults, which are dealt with in the application using redundancy. We adopt the concept of handling faults in the switches from non-real-time networks while maintaining the required predictability. We study a class of forwarding schemes that can handle various types of failures. We consider probabilistic failures. We study a class of forwarding schemes that can handle various types of failures. We consider probabilistic failures. For a given network with a forwarding scheme and a constant ℓ, we compute the {\em score} of the scheme, namely the probability (induced by faults) that at least ℓ messages arrive on time. We reduce the scoring problem to a reachability problem on a Markov chain with a "product-like" structure. Its special structure allows us to reason about it symbolically, and reduce the scoring problem to #SAT. Our solution is generic and can be adapted to different networks and other contexts. Also, we show the computational complexity of the scoring problem is #P-complete, and we study methods to estimate the score. We evaluate the effectiveness of our techniques with an implementation.
Conference Title: TACAS: Tools and Algorithms for the Construction and Analysis of Systems
Volume: 10206
Conference Dates: April 22-April 29, 2017
Conference Location: Uppsala, Sweden
ISBN: 978-3-662-54580-5
Publisher: Springer  
Date Published: 2017-03-31
Start Page: Epub ahead of print
Sponsor: Austrian Science Fund (FWF) grants S11402-N23 (RiSE/SHiNE) and Z211-N23 (Wittgenstein Award); People Programme (Marie Curie Actions) FP7/2007-2013/ grant agreement 607727
URL:
DOI: 10.1007/978-3-662-54580-5_10
Open access: yes (repository)
IST Austria Authors
  1. Thomas A. Henzinger
    398 Henzinger
  2. Guy Avni
    6 Avni
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