| 摘要 |
<p>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 frequency carriers. The frequency separation of the carriers is lower than the baud rate. The optical path is configured by (a) determining a path OSNR (OSNRp) of the path; (b) selecting a carrier bandwidth (BW) so that the channel bandwidth (BWT) is less than or equal to a maximum path bandwidth (BP) available for transmission, wherein the channel bandwidth, BT≈BW·C, wherein BW is the carrier bandwidth and C is the number of frequency carriers; (c) selecting a FEC code having a minimum overhead requirement; (d) determining a channel OSNR (OSNRT) based on the currently selected carrier bandwidth (BW) of carrier frequencies and the currently selected FEC code; (e) in response to determining that the channel OSNR (OSNRT) is not less than or equal to the path OSNR (OSNRp), reselect new codes having increasing overhead requirements until the channel OSNR (OSNRT) is less than the path OSNR (OSNRp), and if this is not possible increase the channel bandwidth (BW) of carrier frequencies and return to step (c); (h) configuring the path for transmission based on the finally selected channel bandwidth (BT) of carrier frequencies and the finally selected FEC code.</p> |
