Abstract
Multistage interconnection networks (MINs) provide an effective way to communicate between processors and memory modules in supercomputer systems. Although shuffle-exchange network (SEN) is viewed as a potential network to manage as MIN for its regular structure and most modest size of switching element (SE), the fault tolerance is an issue in SEN because it is a unique path network. Many networks have been introduced in the past to increase the fault tolerance in the SEN such as SEN−, SEN+, SEN+2, SHSEN. It has been observed that all these networks provide maximum of one fault tolerance at input/output stage. In this paper, a new network has been proposed as FTSM (fault-tolerant SEN-Minus), which addresses the fault tolerance issue with increased number of totally disjoint paths, thus improving the reliability of the entire network. To assure that reliability has been improved and increased, a thorough comparison of 2-terminal reliability has been done with all other SENs.
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