In-skin wavelength division multiplex (WDM) path computation

摘要

A method of managing an optical communication network having a plurality of nodes, the plurality of nodes including at least one regeneration site. A respective Path Computation Element (PCE) function is instantiated and associated with each regeneration site in the network. Each PCE function maintains a reach table containing information of viable optical paths extending from transceivers of its regeneration site. The PCE function implements a Recursive Path Computation algorithm to compute end-to-end routes through a physical layer of the network.

主权项

1. A method of managing an optical communication network comprising a plurality of nodes, the plurality of nodes including at least two regeneration sites, the method comprising
maintaining, by each regeneration site, a reach table containing information of a set of viable optical paths defining a respective local region of the regeneration site, each viable optical path of the set extending from the regeneration site and terminating at a respective photonically reachable neighbor nodes of the regeneration site and being configured to support a photonic connection between the regeneration site and the respective neighbor node; and computing, by each regeneration site, a connection through the respective local region of the regeneration site by:
identifying, using the reach table, each one of the set of viable optical paths extending from the regeneration site; andfor each identified viable optical path, sending a request message to the respective neighbor node terminating the identified viable optical path.