WDM OPTICAL TRANSMISSION SYSTEM AND WAVELENGTH DISPERSION COMPENSATION METHOD
First Claim
1. A WDM optical transmission system including a plurality of optical transmission devices, each of the optical transmission devices comprising:
- a compensator that compensates a wavelength dispersion of an optical signal which has a variable wavelength dispersion value;
a detection circuit that detects a reception characteristic of the optical signal compensated by the compensator;
a first memory that stores a first control program that controls a dispersion compensation amount of the compensator in a host device according to the reception characteristic;
a processor to execute the first control program;
a notification frame transmission circuit that generates a notification frame that includes control information indicating a setting value of the dispersion compensation amount and a detection result of the detection circuit corresponding to the setting value, and that transmits the notification frame to another optical transmission device;
a second memory that stores control information included in the notification frame transmitted from the another optical transmission device;
a third memory that stores a second control program that calculates a control value of the compensator in the another optical transmission device using the control information stored in the second memory; and
a control frame transmission circuit that generates a control frame that includes the control value, and that transmits the control frame to the another optical transmission device, whereinthe processor;
executes the second control program when a problem occurs in a dispersion compensation control of the another optical transmission device, and controls the dispersion compensation amount of the compensator in the host device according to the control value included in the control frame transmitted from the another optical transmission device when a problem occurs in the dispersion compensation control of the host device.
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Accused Products
Abstract
A WDM optical transmission system includes a plurality of optical transmission devices, each of which include a first memory that stores a first control program that controls a dispersion compensation amount in a host device; a processor to execute the first control program; a notification frame transmission circuit that transmits an information indicating a setting value of the dispersion compensation amount and a detection result corresponding to the setting value to another device; a third memory that stores a second control program that calculates a control value of the dispersion compensation amount in the another device; and a control frame transmission circuit that transmits the control value to the another device, wherein the processor executes the second control program when a problem occurs in the another device, and controls the dispersion compensation amount in the host device when a problem occurs in the host device.
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Citations
13 Claims
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1. A WDM optical transmission system including a plurality of optical transmission devices, each of the optical transmission devices comprising:
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a compensator that compensates a wavelength dispersion of an optical signal which has a variable wavelength dispersion value; a detection circuit that detects a reception characteristic of the optical signal compensated by the compensator; a first memory that stores a first control program that controls a dispersion compensation amount of the compensator in a host device according to the reception characteristic; a processor to execute the first control program; a notification frame transmission circuit that generates a notification frame that includes control information indicating a setting value of the dispersion compensation amount and a detection result of the detection circuit corresponding to the setting value, and that transmits the notification frame to another optical transmission device; a second memory that stores control information included in the notification frame transmitted from the another optical transmission device; a third memory that stores a second control program that calculates a control value of the compensator in the another optical transmission device using the control information stored in the second memory; and a control frame transmission circuit that generates a control frame that includes the control value, and that transmits the control frame to the another optical transmission device, wherein the processor; executes the second control program when a problem occurs in a dispersion compensation control of the another optical transmission device, and controls the dispersion compensation amount of the compensator in the host device according to the control value included in the control frame transmitted from the another optical transmission device when a problem occurs in the dispersion compensation control of the host device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wavelength dispersion compensation method in a WDM optical transmission system that includes a first optical transmission device and a second optical transmission device, wherein:
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the first optical transmission device; using a compensator to compensate a wavelength dispersion of an optical signal which has variable wavelength dispersion value; detects a reception characteristic of the dispersion-compensated optical signal; conducts a first control program that controls a dispersion compensation amount of the compensator in a host device using a processor based on the detected reception characteristic, and generates a status notification frame that includes control information indicating a setting value of the dispersion compensation amount of the compensator in the host device and indicating the reception characteristic corresponding to the setting value; transmits the status notification frame to the second optical transmission device; and
whereinthe second optical transmission device; stores control information included in the status notification frame transmitted by the first optical transmission device in a memory and, when a problem in dispersion compensation control occurs in the first optical transmission device, uses the control information stored in the memory, executes a second control program to calculate a dispersion compensation amount control value of the compensator in the first optical transmission device, and generates a control frame that includes the dispersion compensation amount control value calculated according to the second control program; and transmits the control frame to the first optical transmission device, wherein the first optical transmission device controls the dispersion compensation amount of the compensator in the host device according to the control value included in the control frame transmitted from the second optical transmission device when a problem occurs in the dispersion compensation control in the host device. - View Dependent Claims (11, 12, 13)
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Specification