The goal of this paper is to study the rearrangeability of switching networ
ks composed of digital symmetrical matrices (DSM networks). We will describ
e an efficient rearrangement algorithm for rearrangeable DSM networks with
O(r(2)) time complexity, where r is the number of input (output) switches.
We also show that r-1 is an upper bound on the number of existing connectio
ns that need to be rearranged in order to realize a connection request. (C)
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