Method and apparatus for controlling optical fiber amplifier, system, transmission node and storage medium

Patent metadata

Field	Value
Publication number	US-12592536-B2
Application number	US-202218681465-A
Country	US
Kind code	B2
Filing date	Jul 29, 2022
Priority date	Aug 6, 2021
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A method and an apparatus for controlling an optical fiber amplifier, a system, a transmission node and a storage medium. WDM transmission systems are deployed between a first communication end and a second communication end. At least one target WDM transmission system includes a first transmission node and a second transmission node. The first transmission node receives a first control signal including an identifier of the second transmission node, and switches on a transmit-end optical fiber amplifier of the first transmission node if determining that the first control signal is a normal control signal and the second transmission node identifier matches a pre-stored first reference node identifier. The second transmission node receives a second control signal including an identifier of the first transmission node, and performs a similar judgment to switch on a transmit-end optical fiber amplifier of the second transmission node.

First claim

The invention claimed is:

1 . A method for controlling an optical fiber amplifier, applied to an optical fiber communication system, wherein the optical fiber communication system comprises a first communication end and a second communication end, a plurality of wavelength division multiplexing transmission systems are deployed between the first communication end and the second communication end and comprise at least one target wavelength division multiplexing transmission system; the target wavelength division multiplexing transmission system comprises a first transmission node and a second transmission node;
the method comprises: receiving, by the first transmission node, through an optical supervisory channel, a first control signal sent by the second transmission node, in response to a recovery of an interrupted optical fiber between the first transmission node and the second transmission node, wherein the first control signal comprises an identifier of the second transmission node; switching on, by the first transmission node, a transmit-end optical fiber amplifier of the first transmission node which has been switched off, based on that the first transmission node determines that the first control signal is a preset normal control signal and that the identifier of the second transmission node matches a pre-stored first reference node identifier; sending, by the first transmission node, through the optical supervisory channel, a second control signal comprising an identifier of the first transmission node to the second transmission node, such that the second transmission node switches on a transmit-end optical fiber amplifier of the second transmission node which has been switched off, when determining that the second control signal is a preset normal control signal and that the identifier of the first transmission node matches a pre-stored second reference node identifier.

2 . The method according to claim 1 , wherein the first transmission node determining that the first control signal is the preset normal control signal comprises:
determining, by the first transmission node, that the first control signal is the preset normal control signal based on that the first transmission node determines that the first control signal does not carry a preset error indicator.

3 . The method according to claim 1 , further comprising:
switching off, by the first transmission node, the transmit-end optical fiber amplifier of the first transmission node, in response to an interruption of the optical fiber between the first transmission node and the second transmission node and based on that the first transmission node does not receive, through the optical supervisory channel, the preset normal control signal sent by the second transmission node nor detect an optical data signal sent by the second transmission node.

4 . The method according to claim 3 , further comprising:
sending, by the first transmission node, through the optical supervisory channel, a third control signal comprising a preset error indicator to the second transmission node, such that the second transmission node switches off the transmit-end optical fiber amplifier of the second transmission node according to the error indicator.

5 . A non-transitory machine-readable storage medium, wherein an executable code is stored on the non-transitory machine-readable storage medium, and when the executable code is executed by a processor, the processor is caused to perform the method for controlling an optical fiber amplifier according to claim 1 .

6 . The method according to claim 1 , wherein the plurality of wavelength division multiplexing transmission systems are deployed in parallel between the first communication end and the second communication end.

7 . The method according to claim 1 , wherein the plurality of wavelength division multiplexing transmission systems share one optical cable.

8 . An apparatus for controlling an optical fiber amplifier, applied to an optical fiber communication system, wherein the optical fiber communication system comprises a first communication end and a second communication end, a plurality of wavelength division multiplexing transmission systems are deployed between the first communication end and the second communication end and comprise at least one target wavelength division multiplexing transmission system; the target wavelength division multiplexing transmission system comprises a first transmission node and a second transmission node; the apparatus is located at the first transmission node and comprises:
a processor; a memory for storing an instruction executable by the processor; wherein the instruction, when executed by the processor, causes the processor to: receive, through an optical supervisory channel, a first control signal sent by the second transmission node, in response to a recovery of an interrupted optical fiber between the first transmission node and the second transmission node, wherein the first control signal comprises an identifier of the second transmission node; switch on a transmit-end optical fiber amplifier of the first transmission node which has been switched off, based on if determining that the first control signal is a preset normal control signal and that the identifier of the second transmission node matches a pre-stored first reference node identifier; send, through the optical supervisory channel, a second control signal comprising an identifier of the first transmission node to the second transmission node, such that the second transmission node switches on, when determining that the second control signal is a preset normal control signal and that the identifier of the first transmission node matches a pre-stored second reference node identifier, a transmit-end optical fiber amplifier of the second transmission node which has been switched off.

9 . The apparatus according to claim 8 , wherein the processor is further caused to:
determine that the first control signal is the preset normal control signal based on that the first transmission node determines that the first control signal does not carry a preset error indicator.

10 . The apparatus according to claim 8 , wherein the processor is further caused to:
switch off the transmit-end optical fiber amplifier of the first transmission node, in response to an interruption of the optical fiber between the first transmission node and the second transmission node and based on that the first transmission node does not receive, through the optical supervisory channel, the preset normal control signal sent by the second transmission node nor detect an optical data signal sent by the second transmission node.

11 . The apparatus according to claim 10 , wherein the processor is further caused to:
send, through the optical supervisory channel, a third control signal comprising a preset error indicator to the second transmission node, such that the second transmission node switches off the transmit-end optical fiber amplifier of the second transmission node according to the error indicator.

12 . The apparatus according to claim 8 , wherein the plurality of wavelength division multiplexing transmission systems are deployed in parallel between the first communication end and the second communication end.

13 . The apparatus according to claim 8 , wherein the plurality of wavelength division multiplexing transmission systems share one optical cable.

14 . An optical fiber communication system, comprising:
a first communication end, a second communication end, and a plurality of wavelength division multiplexing transmission systems deployed b

Assignees

• Hangzhou Alicloud Feitian Information Tech Co Ltd

Inventors

• Zhang Huan
• Dou Liang
• Chen Sai
• Xie Chongjin
• Li Xingbin

Classifications

• H04J14/02 Primary

  Wavelength-division multiplex systems · CPC title

• H04B10/25

  Arrangements specific to fibre transmission · CPC title

• H01S3/06754

  Fibre amplifiers (H01S3/06708 takes precedence) · CPC title

• H01S3/10015 Primary

  by monitoring or controlling, e.g. attenuating, the input signal · CPC title

• H04B10/294

  in a multiwavelength system, e.g. gain equalisation · CPC title