Impact of the Electronic Architecture of Optical Slot Switching Nodes on Latency in Ring Networks

Abstract : Optical slot switching has formerly been proposed as a flexible solution for metropolitan ring networks to carry data traffic with a sub-wavelength switching granularity and with a good energy efficiency, which is enabled by optical transparency. In this paper, for the first time we propose several architectures for the electronic side of optical slot switching nodes to increase flexibility through the addition of electronic switches, working either at client packet granularity or at slot granularity; such electronic switches can be located at either transmitter side, receiver side, or both sides of a node, thereby decreasing traffic latency, at the expense of increased node cost and/or energy consumption. This paper focuses on the latency aspect. We investigate the impact of a timer that can be used to upper bound the slot insertion time on the medium. We also propose, a novel client packet queuing model in an optical slot switching ring and assess and compare the latency of these node architectures analytically, and with simulations.
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Journal of Optical Communications and Networking, IEEE/OSA, 2014, pp.12. 〈10.1364/JOCN.6.000718〉
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Nihel Benzaoui, Yvan Pointurier, Thomas Bonald, Jean-Christophe Antona. Impact of the Electronic Architecture of Optical Slot Switching Nodes on Latency in Ring Networks. Journal of Optical Communications and Networking, IEEE/OSA, 2014, pp.12. 〈10.1364/JOCN.6.000718〉. 〈hal-01132320〉

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