Power level management in optical networks
AssigneeFujitsu Limited
InventorsKumar Vijay Peddanarappagari, Jamil Omar-Hatem El-Reedy, Emir Catovic
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Abstract
In an optical communication network, optical communication nodes exchange information detailing power level variations to support management and administration of optical communications. This exchange of information permits nodes to determine aggregate power level variations over light paths to support operations such as selection from available light paths and configuration of optical communication characteristics.
Claims26
A method for power level management of optical communications, the method comprising:
- receiving a request to establish a communication channel with a remote optical node;
- determining a plurality of light paths to the remote optical node;
- for each of the light paths:
- determining a next node for the light path to the remote optical node;
- determining add power level variation for the light path;
- generating a path setup message identifying the light path and the add power variation;
- and
- communicating the path setup message to the next node;
- receiving at least two path setup replies from the remote optical node, each of the path setup replies indicating an aggregate power level variation for a corresponding one of the light paths;
- and
- selecting one of the light paths based on the aggregate power level variations indicated in the path setup replies.
An optical communication node comprising:
- a cross-connect fabric operable to receive optical communications from an input fiber and an add fiber and to switch received optical communications for transmission on a selected one of an output fiber and a drop fiber;
- and
- a controller operable to receive a request to establish a communication channel with a remote optical node and to determine a plurality of light paths to the remote optical node, the controller further operable, for each of the light paths, to determine a next node for the light path to the remote optical node, to determine add power level variation for the light path, to generate a path setup message identifying the light path and the add power variation, and to communicate the path setup message to the next node, the controller further operable to receive at least two path setup replies from the remote optical node, each of the path setup replies indicating an aggregate power level variation for a corresponding one of the light paths, and select one of the light paths based on the aggregate power level variations indicated in the path setup replies.
Computer logic for power level management of optical communications, the computer logic encoded in a computer readable medium and operable when executed to:
- receive a request to establish a communication channel with a remote optical node;
- determine a plurality of light paths to the remote optical node;
- for each of the light paths:
- determine a next node for the light path to the remote optical node;
- determine add power level variation for the light path;
- generate a path setup message identifying the light path and the add power variation;
- and
- communicate the path setup message to the next node;
- receive at least two path setup replies from the remote optical node, each of the path setup replies indicating an aggregate power level variation for a corresponding one of the light paths;
- and
- select one of the light paths based on the aggregate power level variations indicated in the path setup replies.
An optical communication node comprising:
- means for receiving a request to establish a communication channel with a remote optical node;
- means for determining a plurality of light paths to the remote optical node;
- means for, for each of the light paths:
- determining a next node for the light path to the remote optical node;
- determining add power level variation for the light path;
- generating a path setup message identifying the light path and the add power variation;
- and
- communicating the path setup message to the next node;
- means for receiving at least two path setup replies from the remote optical node, each of the path setup replies indicating an aggregate power level variation for a corresponding one of the light paths;
- and
- means for selecting one of the light paths based on the aggregate power level variations indicated in the path setup replies.
Dependencies are inferred from the claim text.