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From: wlrush@poppy.waterloo.edu (Wench Wendall)
Newsgroups: ont.events,uw.talks,uw.cs.grad
Subject: COMPUTER NETWORKS SEMINAR
Keywords: Professor Andrzej Jajszczyk, Tech. Univ. of Poznan, Poland, 
          will speak on "Fault Diagnosis of Digital Switching Networks."
Message-ID: <14228@watdragon.waterloo.edu>
Date: 1 Jun 89 17:58:16 GMT
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DEPARTMENT OF COMPUTER SCIENCE
UNIVERSITY OF WATERLOO
SEMINAR ACTIVITIES

COMPUTER NETWORKS SEMINAR

(JOINT SEMINAR WITH ELECTRIAL ENGINEERING)


                    -Tuesday, June 6, 1989

Professor  Andrzej  Jajszczyk,  Technical University of
Poznan,  Poland,  will  speak  on  "Fault  Diagnosis of
Digital Switching Networks."

TIME:                 3:30 p.m.

ROOM:              DC 1304

ABSTRACT

Methods  of  fault  detection and location for separate
digital  switching  matrices  (DSM's) as well as a wide
class of switching networks are proposed.  First, it is
assumed that stuck-type faults can affect only a single
component  of a network.  A model of a switching matrix
is  presented  and fault equivalences are shown.  After
the  discussion of a method of single switch diagnosis,
test vectors and connection settings for identification
of  a  single  faulty switch in multistage networks are
proposed.   To avoid the masking effects the notions of
an  H-test  vector  and an H-assignment are introduced.
In  the  proposed  approach,  tests  for space and time
switching   are  performed  separately.   Finally,  the
analysis  is  extended  to  include  multiple component
faults.