Abstract
In optical-bypass-enabled networks, an important aspect of the planning process is selecting the regeneration sites for a connection, if any. Regeneration “cleans up” the optical signal, typically by reamplifying, reshaping, and retiming it. Paths are usually selected to minimize the amount of required regeneration, as regeneration adds to the network cost and reduces the reliability of a path. The first portion of this chapter discusses various optical impairments and system properties that have an impact on when a signal must be regenerated, and addresses how these factors can be efficiently incorporated in network planning algorithms. The discussion then moves from the physical-layer aspects of regeneration to the architectural facets. Several regeneration architectures are presented, where the trade-off is between operational simplicity and cost. Finally, different options for actually implementing regeneration at a network site are presented. Again, there is a trade-off of operational flexibility versus cost.
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Simmons, J. (2014). Regeneration. In: Optical Network Design and Planning. Optical Networks. Springer, Cham. https://doi.org/10.1007/978-3-319-05227-4_4
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