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Architectural Considerations for an Optical Extended Generalized Shuffle Networks Based on 2-Modules.

28 March 1989

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The hardware requirements for an optical implementation of an Extended Generalized Shuffle Network are described. The network is constructed from a new type of switching elements (known as a 2-module), and the 2-modules in consecutive stages are connected via optical crossover interconnections. It is shown that there is a fundamental trade-off between hardware cost and blocking probability in the photonic EGS network. It is also shown that the networks are very robust, because there are many ways to add fault-tolerance to the EGS networks. After discussing fault- detection, fault-location, fault-isolation, and fault-recovery, the system down-time of the photonic EGS network is analyzed.