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Fault-tolerance analysis of one-sided crosspoint switching networks

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2 Author(s)
Varma, A. ; Dept. of Comput. Eng., California Univ., Santa Cruz, CA, USA ; Chalasani, S.

The fault-tolerance capability of one-sided crosspoint networks is analyzed with respect to crosspoint faults. Because of the correspondence between one-sided crosspoint networks and multiple-bus interconnection networks, the analysis also applies to multiple-bus configurations, where M buses are used to interconnect N processors. Upper bounds are established on the size of a fault set to sustain a given level of connectivity. Two modes of operation are considered, namely, nonblocking and rearrangeable. A complete nonblocking switch matrix with N ports has N2 /2 crosspoints. It is shown that at most N/2-1 faulty crosspoints can be tolerated in the case of nonblocking operation

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Computers, IEEE Transactions on  (Volume:41 ,  Issue: 2 )