Method and apparatus for configuring an optical path
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United States of America Patent
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Oct 31, 2017
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app pub date -
Jul 2, 2012
filing date -
Jul 2, 2012
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Abstract
An optical path for transmission of data from a source node to a destination node comprises an optical channel for parallel transmission of non overlapping carrier frequencies. The frequency separation of the carriers is lower than the baud rate. The optical path is configured by (a) determining a path OSNR (OSNRp ); (b) selecting a carrier bandwidth (BW) so that the channel bandwidth (BWT ) is less than or equal to a maximum path bandwidth available for transmission, wherein BWT≈BW·C, wherein C is the number of carrier frequencies; (c) selecting a FEC code having a minimum overhead requirement; (d) determining a channel OSNR (OSNRT ) based on the currently selected BW and FEC code; (e) in response to determining that OSNRT is not less than or equal to OSNRp, reselecting new codes having increasing overhead requirements until OSNRT is less than OSNRp, and if this is not possible increasing BWT and returning to step (c); (h) configuring the path for transmission based on the finally selected BWTand FEC code.
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