Abstract
Wavelength-routed networks use individual wavelengths which can be statically or dynamically allocated to source-destination pairs using combinations of modulators, filters, and waveguides. Wavelength-routed networks use wavelength selectivity in order to route data through the network, in contrast to circuit-switched networks which utilize wavelength selectivity for bandwidth aggregation. The wavelength arbitration technique limits the point-to-point bandwidth to a subset of the total number of wavelengths available in the system. This chapter considers architectures where each point-to-point link is composed of a single wavelength channel (unless specified) for simplicity of discussion. This assumption is true of most wavelength-routed networks that have been proposed in literature. These architectures typically exhibit lower latencies than circuit-switched architectures since they do not require the path-setup protocol. Fundamentally, the latency of wavelength-routed networks is only limited by the speed of light and the time required to perform CDR. This chapter describes some of the fundamental building blocks of wavelength-routed architectures and explores some examples of architectures that have been proposed.
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D. Vantrease, R. Schreiber, M. Monchiero, M. McLaren, N. P. Jouppi, M. Fiorentino, A. Davis, N. Binkert, R. G. Beausoleil, and J. H. Ahn, “Corona: System implications of emerging nanophotonic technology”, in Proceedings of 35th International Symposium on Computer, Architecture, Aug. 2008.
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Bergman, K., Carloni, L.P., Biberman, A., Chan, J., Hendry, G. (2014). Photonic Network Architectures II: Wavelength Arbitration and Routing. In: Photonic Network-on-Chip Design. Integrated Circuits and Systems, vol 68. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-9335-9_6
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DOI: https://doi.org/10.1007/978-1-4419-9335-9_6
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