Evaluation of the time-domain approach for crosstalk-free communication in photonic switches

Jia H. Wang; Chunming Qiao

doi:10.1117/12.227831

1 December 1995 Evaluation of the time-domain approach for crosstalk-free communication in photonic switches

Jia H. Wang, Chunming Qiao

Proceedings Volume 2614, All-Optical Communication Systems: Architecture, Control, and Network Issues; (1995) https://doi.org/10.1117/12.227831
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

First-order crosstalk in Multistage Interconnection Network (MINs) can be avoided by ensuring only one input of each switch is active at a given time, in other words, no two connections can use the same switch simultaneously. A space domain approach dilates an N- by-N network into one that is essentially equivalent to a 2N-by-2N network. The time domain approach proposed extends the `dilation' concept from space to time to avoid crosstalk by establishing the connections sharing the same switch in different time slots. This paper studies the tradeoffs of these two approaches in two different MINs, namely, Banyan and Benes, under both individual and stage switch control. Theoretical analysis showed that in a Banyan with stage control, the set of N-by-N permutations whose connections can be established crosstalk free in two time slots using the time domain approach is more than the set of permutations that can be realized in one time slot using the space domain approach. In addition, simulation results showed that given the same set of one-to-one or one-to-many connections, the number of time slots needed by the time-domain approach is less than twice of that needed by the space-domain approach.

Citation Download Citation

Jia H. Wang and Chunming Qiao "Evaluation of the time-domain approach for crosstalk-free communication in photonic switches", Proc. SPIE 2614, All-Optical Communication Systems: Architecture, Control, and Network Issues, (1 December 1995); https://doi.org/10.1117/12.227831

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