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        A Novel Optical High-Availability Seamless Redundancy (OHSR) Design Based on Beam Splitting / Combining Techniques

        Ibraheem Raed Altaha,김성철,이종명 한국광학회 2016 Current Optics and Photonics Vol.20 No.6

        The standard high-availability seamless redundancy (HSR) protocol utilizes duplicated frame copies ofeach sent frame for zero fail over time. This means that even in cases of a node or link failure, thedestination node will receive at least one copy of the sent frame, resulting in no network downtime. However, the standard HSR is mostly based on the electrical signal connection inside the node, whichleads to the production of considerable latency at each node due to frame processing. Therefore, in a largescale HSR ring network, the accumulated latencies become significant and can often restrict themission-critical real-time application of HSR. In this paper, we present a novel design for optical HSR(OHSR) that uses beam splitting/combining techniques. The proposed OHSR passes the frames directlyto adjacent nodes without frame processing at each node, thereby theoretically generating no latency inany node. Various simulations for network samples, made to validate the OHSR design and its performance,show that the OHSR outperforms the standard HSR.

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