CN114039697A - Wavelength division link protection method and system - Google Patents

Wavelength division link protection method and system Download PDF

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Publication number
CN114039697A
CN114039697A CN202111304628.7A CN202111304628A CN114039697A CN 114039697 A CN114039697 A CN 114039697A CN 202111304628 A CN202111304628 A CN 202111304628A CN 114039697 A CN114039697 A CN 114039697A
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optical
link
module
component
multiplexing
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CN114039697B (en
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程明
蒋铭
张德智
杜喆
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

The present disclosure relates to a wavelength division link protection method and system. The wavelength division link protection method comprises the following steps: the wavelength multiplexing and demultiplexing component distributes two optical signals sent by the dual-mode optical module to a main link and a standby link, wherein the wavelength multiplexing and demultiplexing component is a wavelength multiplexing and demultiplexing component of a wavelength division link protection system, and the wavelength division link protection system further comprises the dual-mode optical module and an optical switch component; the optical switch component detects the link optical power of the main link, and switches the service link from the main link to the standby link under the condition that the main link is interrupted; the wavelength combining and splitting component is used for splitting the wavelength combining signals passing through the optical switch component to different opposite-end optical modules. The present disclosure may achieve protection of the wavelength division link by monitoring the optical signal power through the line and controlling the optical switch.

Description

Wavelength division link protection method and system
Technical Field
The present disclosure relates to the field of optical communications, and in particular, to a method and a system for wavelength division link protection.
Background
WDM (Wavelength Division Multiplexing) is a technology for coupling a plurality of optical signals with different wavelengths into the same optical fiber through a multiplexer to transmit data, and the application of the technology can save a large amount of optical fiber resources. In order to cope with the risk of interruption of the optical fiber line, the optical line is generally protected, and the working line is automatically switched to the protection line when a fault occurs.
Disclosure of Invention
The inventor finds out through research that: the pre-transmission optical fiber path protection technology of the related technology is mainly a semi-active scheme. The semi-active scheme adopts an optical splitter and an optical switch, and high line insertion loss can be introduced due to large insertion loss of the optical splitter.
In view of at least one of the above technical problems, the present disclosure provides a wavelength division link protection method and system that achieves protection of a wavelength division link by monitoring optical signal power through a line and controlling an optical switch.
According to an aspect of the present disclosure, there is provided a wavelength division link protection system, including a dual-mode optical module, a wavelength multiplexing/demultiplexing module, and an optical switch module, wherein:
the dual-mode optical module is used for supporting the sending of two paths of optical signals with different wavelengths and the receiving of one path of optical signal;
the wavelength combining and splitting component is a passive device and is used for distributing two paths of optical signals sent by the dual-mode optical module to the main link and the standby link and splitting the combined wave signals passing through the optical switch component to different opposite-end optical modules; the method comprises the steps that optical signals sent by an opposite-end optical module are combined into a main link and a standby link, and combined signals are subjected to wave splitting to different dual-mode optical modules, wherein the opposite-end optical module is an optical switch side optical module;
and the optical switch component is used for detecting the link optical power of the main link and switching the service link from the main link to the standby link under the condition that the main link is interrupted.
In some embodiments of the present disclosure, the combining and splitting component comprises a first combining and splitting component and a second combining and splitting component, wherein:
the dual-mode optical module is used for sending a main optical signal to the optical switch assembly through the first multiplexer/demultiplexer assembly and the main link and sending a standby optical signal to the optical switch assembly through the first multiplexer/demultiplexer assembly and the standby link;
the optical switch assembly is used for transmitting the main optical signal to the opposite-end optical module after passing through the second wavelength multiplexing and demultiplexing assembly under the condition that the main link is a service link; and under the condition that the standby link is a service link, transmitting the standby optical signal to the opposite-end optical module after passing through the second wavelength multiplexing and demultiplexing component.
In some embodiments of the present disclosure, the dual-mode optical module is connected with the first multiplexing/demultiplexing component through an optical path; the first multiplexing/demultiplexing component is connected with the optical switch component through a main link and a standby link respectively; the optical switch component is connected with the second wave-combining and splitting component through an optical path; the second wave combining and splitting component is connected with the opposite-end optical module through an optical path.
In some embodiments of the present disclosure, the first add/drop component is configured to distribute two optical signals sent by the dual-mode optical module to the active link and the standby link; and the combined wave signals sent by the opposite-end optical module through the main link and the standby link are subjected to wave splitting to different dual-mode optical modules.
In some embodiments of the present disclosure, the second add/drop component is configured to drop a combined wave signal, which is sent by the dual-mode optical module and passes through the optical switch component, to different opposite-end optical modules; and combining the optical signals sent by the opposite-end optical module into the optical switch assembly.
In some embodiments of the present disclosure, the first multiplexing and demultiplexing component comprises a demultiplexer, a coupler, a first multiplexing and demultiplexing module, and a second multiplexing and demultiplexing module, the second multiplexing and demultiplexing component comprises a third multiplexing and demultiplexing module, wherein:
the system comprises a dual-mode optical module, a demultiplexer, a main optical module and a standby optical module, wherein the dual-mode optical module is used for sending a main optical signal and a standby optical signal to the demultiplexer under the condition of sending a forward optical signal, and the forward optical signal is an optical signal sent to an opposite-end optical module by the dual-mode optical module;
the demultiplexer is used for sending the main optical signal to the first multiplexing and demultiplexing module and the main link and sending the standby optical signal to the second multiplexing and demultiplexing module and the standby link under the condition of sending the forward optical signal;
and the optical switch component is used for sending the main optical signal to the opposite-end optical module through the third multiplexing and demultiplexing module under the condition that the main link is a service link and sends the forward optical signal.
In some embodiments of the present disclosure, the opposite-end optical module is configured to send, when the main link is a service link and a reverse optical signal is sent, the reverse optical signal to the dual-mode optical module through the third multiplexing and demultiplexing module, the optical switch assembly, the main link, the first multiplexing and demultiplexing module, and the coupler, where the reverse optical signal is an optical signal sent by the opposite-end optical module to the dual-mode optical module.
In some embodiments of the present disclosure, the optical switch component is configured to detect that optical power of the main line is lower than a predetermined value and send the standby optical signal to the opposite-end optical module through the third multiplexing and demultiplexing module when the standby link is a service link and sends the forward optical signal, so as to implement switching of the forward service signal.
In some embodiments of the present disclosure, the peer-to-peer optical module is configured to send the reverse optical signal to the dual-mode optical module through the third multiplexing and demultiplexing module, the optical switch component, the standby link, the second multiplexing and demultiplexing module, and the coupler, when the standby link is a service link and the reverse optical signal is sent.
In some embodiments of the present disclosure, the optical switch assembly comprises an optical switch and an optical power detection module, wherein:
the optical power detection module is used for detecting the optical power of the main link and the standby link;
and the optical switch is used for switching the service link from the active link to the standby link under the condition that the active link is interrupted.
According to another aspect of the present disclosure, there is provided a wavelength division link protection method, including:
the wavelength division link protection system comprises a wavelength division link module, a wavelength division multiplexing component and an optical switch component, wherein the wavelength division multiplexing component distributes two optical signals sent by the dual-mode optical module to a main link and a standby link;
the optical switch component detects the link optical power of the main link, and switches the service link from the main link to the standby link under the condition that the main link is interrupted;
the wavelength combining and splitting component is used for splitting the wavelength combining signals passing through the optical switch component to different opposite-end optical modules.
In some embodiments of the present disclosure, the method for wavelength division link protection further comprises:
under the condition of sending a forward optical signal, the dual-mode optical module sends a main optical signal to the optical switch assembly through the first combining and splitting component and the main link, and sends a standby optical signal to the optical switch assembly through the first combining and splitting component and the standby link, wherein the combining and splitting component comprises a first combining and splitting component and a second combining and splitting component, and the forward optical signal is an optical signal sent from the dual-mode optical module to an opposite-end optical module;
under the condition that the main link is a service link, the optical switch component sends the main optical signal to the opposite-end optical module after passing through the second wavelength multiplexing and demultiplexing component;
and under the condition that the standby link is a service link, the optical switch component sends the standby optical signal to the opposite-end optical module after passing through the second wavelength multiplexing and demultiplexing component.
In some embodiments of the present disclosure, the sending, by the dual-mode optical module, the main optical signal to the optical switch assembly through the first add/drop assembly and the main link, and sending the standby optical signal to the optical switch assembly through the first add/drop assembly and the standby link includes:
the dual-mode optical module sends a main optical signal and a standby optical signal to the demultiplexer, wherein the first multiplexing and demultiplexing component comprises the demultiplexer, a coupler, a first multiplexing and demultiplexing module and a second multiplexing and demultiplexing module;
the demultiplexer sends the main optical signal to the first multiplexing and demultiplexing module and the main link and sends the main optical signal to the optical switch component;
the demultiplexer sends the standby optical signal to the second multiplexing and demultiplexing module and the standby link, and sends the standby optical signal to the optical switch assembly.
In some embodiments of the present disclosure, the method for wavelength division link protection further comprises:
when the main link is a service link and a reverse optical signal is sent, the opposite-end optical module sends the reverse optical signal to the dual-mode optical module through the third multiplexing and demultiplexing module, the optical switch assembly, the main link, the first multiplexing and demultiplexing module and the coupler, wherein the reverse optical signal is an optical signal sent to the dual-mode optical module by the opposite-end optical module;
and under the condition that the standby link is a service link and transmits the reverse optical signal, the optical module at the opposite end transmits the reverse optical signal to the dual-mode optical module through the third multiplexing and demultiplexing module, the optical switch component, the standby link, the second multiplexing and demultiplexing module and the coupler.
The present disclosure may achieve protection of the wavelength division link by monitoring the optical signal power through the line and controlling the optical switch.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of some embodiments of the disclosed wavelength division link protection system.
Fig. 2 is a schematic diagram of some embodiments of the disclosed wavelength division link protection method.
Fig. 3 is a schematic diagram of some embodiments of dual-mode optical module-based wavelength division link protection according to the present disclosure.
Fig. 4 is a schematic diagram of other embodiments of the disclosed wavelength division link protection method.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of some embodiments of the disclosed wavelength division link protection system. As shown in fig. 1, the wavelength division link protection system of the present disclosure may include a dual mode optical module 100, a wavelength multiplexing/demultiplexing component 200, and an optical switch component 300, wherein:
the dual-mode optical module 100 is configured to support sending of two optical signals with different wavelengths and receiving of one optical signal.
In some embodiments of the present disclosure, as shown in fig. 1, the dual mode optical module 100 may be multiple, for example: dual mode optical module 1, dual mode optical module 2, …, dual mode optical module N.
In some embodiments of the present disclosure, as shown in fig. 1, dual-mode optical module 1 supports two different wavelengths (λ)11And λ12) And a path of optical signal (lambda)13) Receiving; the dual-mode optical module 2 supports two paths of different wavelengths (lambda)21And λ22) And a path of optical signal (lambda)23) Receiving; the dual-mode optical module N supports two paths of different wavelengths (lambda)N1And λN2) Sending of optical signal and one-way optical signal(λN3) Is received.
The wavelength multiplexing and demultiplexing component 200 is configured to distribute two optical signals sent by the dual-mode optical module 100 to the primary link 400 and the standby link 500, and demultiplex the wavelength multiplexing signals passing through the optical switch component 300 to different opposite-end optical modules 600; the optical signals sent by the opposite-end optical module 600 are multiplexed into the main link 400 and the standby link 500, and the multiplexed signals are demultiplexed to different dual-mode optical modules 100, wherein the opposite-end optical module 600 is an optical switch side optical module.
In some embodiments of the present disclosure, the wavelength multiplexing and demultiplexing component 200 is a passive device.
In some embodiments of the present disclosure, as shown in fig. 1, the peer optical module 600 may be a plurality of optical modules, for example: optical module 1, optical module 2, …, and optical module N.
In some embodiments of the present disclosure, as shown in fig. 1, the optical module 1 supports two different wavelengths (λ)11And λ12) And receiving the optical signal and a path of optical signal (lambda)13) Sending of (1); the optical module 2 supports two paths of different wavelengths (lambda)21And λ22) And receiving the optical signal and a path of optical signal (lambda)23) Sending of (1); optical module N supports two paths of different wavelengths (lambda)N1And λN2) And receiving the optical signal and a path of optical signal (lambda)N3) Is sent.
An optical switch assembly 300 for detecting the link optical power of the active link 400; in case the active link 400 is down, the traffic link is switched from the active link 400 to the standby link 500.
In some embodiments of the present disclosure, as shown in fig. 1, the present switching/demultiplexing component 200 may include a first switching/demultiplexing component 210 and a second switching/demultiplexing component 220, wherein:
the dual-mode optical module 100 is configured to send a main optical signal to the optical switch assembly 300 through the first optical add/drop assembly 210 and the main link 400, and send a standby optical signal to the optical switch assembly 300 through the first optical add/drop assembly 210 and the standby link 500.
The optical switch assembly 300 is configured to send a main optical signal to the opposite-end optical module 600 after passing through the second add/drop assembly 220 when the main link 400 is a service link; when the standby link 500 is a service link, the standby optical signal is transmitted to the opposite-end optical module 600 after passing through the second add/drop component 220.
In some embodiments of the present disclosure, as shown in fig. 1, the dual mode optical module 100 is connected to the first add/drop component 210 through an optical path; the first multiplexer/demultiplexer 210 is connected to the optical switch module 300 through the active link 400 and the standby link 500, respectively; the optical switch module 300 is connected to the second multiplexer/demultiplexer module 220 through an optical path; the second wavelength/wavelength multiplexing/demultiplexing component 220 is connected to the opposite optical module 600 through an optical path.
In some embodiments of the present disclosure, as shown in fig. 1, the first add/drop component 210 is configured to distribute two optical signals sent by the dual-mode optical module 100 to the active link 400 and the standby link 500; the combined wave signals sent by the opposite-end optical module 600 through the active link 400 and the standby link 500 are subjected to wave splitting to different dual-mode optical modules 100.
In some embodiments of the present disclosure, as shown in fig. 1, the second combining and demultiplexing component 220 is configured to demultiplex a combined signal, which is sent by the dual-mode optical module 100 and passes through the optical switch component 300, to different opposite-end optical modules 600; the optical signal transmitted by the peer optical module 600 is combined into the optical switch assembly 300.
In some embodiments of the present disclosure, as shown in fig. 1, the first wavelength multiplexing/demultiplexing component 210 includes a demultiplexer 211, a coupler 212, a first multiplexing/demultiplexing module 213, and a second multiplexing/demultiplexing module 214, and the second wavelength multiplexing/demultiplexing component 220 includes a third multiplexing/demultiplexing module 221, where:
the dual-mode optical module 100 is configured to send a main optical signal and a standby optical signal to the demultiplexer 211 when sending a forward optical signal, where the forward optical signal is an optical signal sent by the dual-mode optical module 100 to the peer optical module 600.
The demultiplexer 211 is configured to send a main optical signal to the first multiplexing/demultiplexing module 213 and the active link 400 and send a standby optical signal to the second multiplexing/demultiplexing module 214 and the standby link 500 when sending a forward optical signal.
In some embodiments of the present disclosure, for each dual-mode optical module, one demultiplexer and one coupler are respectively configured, for example: as in the embodiment of fig. 1, a demultiplexer 1 (decoupling 1) and a coupler 1 (coupling 1) are configured corresponding to the dual-mode optical module 1; a demultiplexer 2 (decouple 2) and a coupler 2 (couple 2) are configured corresponding to the dual-mode optical module 2; a demultiplexer N (decoupling N) and a coupler N (coupling N) are configured corresponding to the dual mode optical module N.
The optical switch assembly 300 is configured to send the main optical signal to the opposite-end optical module 600 through the third multiplexing/demultiplexing module 221 when the active link 400 is a service link and sends a forward optical signal.
In some embodiments of the present disclosure, the first, second and third multiplexing/ demultiplexing modules 213, 214 and 221 each include a multiplexer and a demultiplexer.
In some embodiments of the present disclosure, as shown in fig. 1, the opposite-end optical module 600 is configured to send, when the active link 400 is a service link and sends a reverse optical signal, the reverse optical signal is sent to the dual-mode optical module 100 through the third multiplexing and demultiplexing module 221, the optical switch assembly 300, the active link 400, the first multiplexing and demultiplexing module 213, and the coupler 212, where the reverse optical signal is an optical signal sent by the opposite-end optical module 600 to the dual-mode optical module 100.
In some embodiments of the present disclosure, as shown in fig. 1, the optical switch component 300 is configured to detect that optical power of the main line is lower than a predetermined value and send the standby optical signal to the peer optical module 600 through the third multiplexing and demultiplexing module 221 when the standby link 500 is a service link and sends the forward optical signal, so as to implement switching of the forward service signal.
In some embodiments of the present disclosure, as shown in fig. 1, the peer optical module 600 is configured to transmit the reverse optical signal to the dual mode optical module 100 through the third multiplexing and demultiplexing module 221, the optical switch assembly 300, the backup link 500, the second multiplexing and demultiplexing module 214, and the coupler 212, when the backup link 500 is a traffic link and transmits the reverse optical signal.
In some embodiments of the present disclosure, as shown in fig. 1, the optical switch assembly 300 includes an optical switch 310 and an optical power detection module, wherein:
and an optical power detection module, configured to detect optical powers of the active link 400 and the standby link 500.
The optical switch 310 is configured to switch the service link from the active link 400 to the standby link 500 in case of interruption of the active link 400.
In some embodiments of the present disclosure, as shown in fig. 1, the optical switch 310 may be a 1X2 optical switch.
The embodiments of the present disclosure provide a wavelength division link protection system based on a dual-mode optical module, where the system includes the dual-mode optical module, an optical multiplexer/demultiplexer component, and an optical switch component, and the wavelength division link protection is implemented by monitoring optical signal power passing through a line and controlling the optical switch.
The embodiment of the disclosure is based on a dual-mode optical module, the adopted wavelength multiplexing and demultiplexing component is in a demultiplexer + optical switch mode, and compared with a mode of adopting an optical splitter + optical switch in the related art, the embodiment of the disclosure has smaller loss, thereby reducing the requirement of optical power budget of a line.
Fig. 2 is a schematic diagram of some embodiments of the disclosed wavelength division link protection method. Fig. 3 is a schematic diagram of some embodiments of dual-mode optical module-based wavelength division link protection according to the present disclosure. Preferably, the fig. 2 embodiment may be performed by a wavelength division link protection system of the present disclosure (e.g., the wavelength division link protection system of the fig. 1 or fig. 3 embodiment). As shown in the embodiments of fig. 1-3, the disclosed wavelength division link protection method may include at least one of the following steps:
step 21, the wavelength multiplexing/demultiplexing component 200 distributes two optical signals sent by the dual-mode optical module 100 to the active link 400 and the standby link 500, where the wavelength multiplexing/demultiplexing component 200 is the wavelength multiplexing/demultiplexing component 200 of the wavelength division link protection system according to any of the embodiments, and the wavelength multiplexing/demultiplexing link protection system further includes the dual-mode optical module 100 and the optical switch component 300.
In step 22, the optical switch module 300 detects the link optical power of the active link 400, and switches the service link from the active link 400 to the standby link 500 when the active link 400 is interrupted.
In step 23, the combining and demultiplexing module 200 demultiplexes the combined signal passing through the optical switch module 300 to different opposite optical modules 600.
Fig. 4 is a schematic diagram of other embodiments of the disclosed wavelength division link protection method. Preferably, the fig. 4 embodiment may be performed by a wavelength division link protection system of the present disclosure (e.g., the wavelength division link protection system of the fig. 1 or fig. 3 embodiment). As shown in the embodiments of fig. 1, 3 and 4, the wavelength division link protection method of the present disclosure may include at least one of the following steps:
step 41, in the case of sending a forward optical signal, the dual-mode optical module 100 sends a main optical signal to the optical switch assembly 300 (as shown by a light-colored solid curve 1 in the embodiment of fig. 3) through the first add/drop assembly 210 and the main link 400, and sends a backup optical signal to the optical switch assembly 300 (as shown by a dark-colored dashed curve 2 in the embodiment of fig. 3) through the first add/drop assembly 210 and the backup link 500, where the add/drop assembly 200 includes the first add/drop assembly 210 and the second add/drop assembly 220, and the forward optical signal is an optical signal sent by the dual-mode optical module 100 to the optical module opposite end 600;
in some embodiments of the present disclosure, step 41 may include at least one of steps 411-413, wherein:
in step 411, the dual-mode optical module 100 sends the main optical signal and the standby optical signal to the demultiplexer 211, where the first wavelength multiplexing/demultiplexing component 210 includes the demultiplexer 211, the coupler 212, the first multiplexing/demultiplexing module 213, and the second multiplexing/demultiplexing module 214.
In step 412, the demultiplexer 211 sends the main optical signal to the first multiplexing/demultiplexing module 213 and the active link 400, and sends the main optical signal to the optical switch assembly 300.
In step 413, the demultiplexer 211 sends the standby optical signal to the second multiplexing/demultiplexing module 214 and the standby link 500, and sends the standby optical signal to the optical switch module 300.
Step 42, in the case that the active link 400 is a service link, the optical switch assembly 300 sends the main optical signal to the opposite-end optical module 600 after passing through the second add/drop assembly 220.
Step 43, in the case that the backup link 500 is a service link, the optical switch assembly 300 sends the backup optical signal to the peer optical module 600 after passing through the second add/drop assembly 220.
Step 44, in a case that the active link 400 is a service link and transmits a reverse optical signal, the opposite-end optical module 600 transmits the reverse optical signal to the dual-mode optical module 100 through the third multiplexing and demultiplexing module 221, the optical switch assembly 300, the active link 400, the first multiplexing and demultiplexing module 213, and the coupler 212 (as shown in the dark solid curve 3 in the embodiment of fig. 3), where the reverse optical signal is an optical signal transmitted by the opposite-end optical module 600 to the dual-mode optical module 100.
Step 45, in a case that the backup link 500 is a service link and transmits a reverse optical signal, the optical transceiver module 600 transmits the reverse optical signal to the dual-mode optical module 100 through the third multiplexing and demultiplexing module 221, the optical switch assembly 300, the backup link 500, the second multiplexing and demultiplexing module 214, and the coupler 212 (as shown in the light-colored dashed curve 4 in the embodiment of fig. 3).
In some embodiments of the present disclosure, as shown in fig. 3, when the system normally operates (that is, the main link 400 is a service link) and sends forward optical signals, after λ 11 and λ 12 optical signals sent by the dual-mode optical module 1 pass through the demultiplexer 1, λ 11 enters the first multiplexing and demultiplexing module 213 and the main link, λ 12 enters the second multiplexing and demultiplexing module 214 and the standby link, and λ 11 passes through the optical switch and reaches the receiving end of the optical module 1 through the third multiplexing and demultiplexing module 221. When the system works normally and sends a reverse optical signal, the λ 13 optical signal sent by the optical module 1 reaches the receiving end of the dual-mode optical module 1 through the third multiplexing/demultiplexing module 221, the optical switch, the main link, the first multiplexing/demultiplexing module 213, and the coupler 1.
In some embodiments of the present disclosure, as shown in fig. 3, after the main link is interrupted, the optical switch component detects that the optical power of the main line is low to trigger switching (that is, the standby link 500 is a service link), and sends a forward optical signal, after λ 11 and λ 12 optical signals sent by the dual-mode optical module 1 pass through the demultiplexer 1, λ 11 enters the first multiplexing and demultiplexing module 213 and the main link, λ 12 enters the second multiplexing and demultiplexing module 214 and the standby link, and λ 12 passes through the optical switch and reaches the receiving end of the optical module 1 through the third multiplexing and demultiplexing module 221, so as to implement switching of the forward service signal. When the standby link 500 is a service link and transmits a reverse optical signal, the λ 13 optical signal transmitted by the optical module 1 passes through the third multiplexing/demultiplexing module 221, the optical switch, the standby link, the second multiplexing/demultiplexing module 214, and the coupler 1 to reach the receiving end of the dual-mode optical module 1, so as to implement protection switching of the reverse service.
The embodiments of the present disclosure provide a wavelength division link protection system and method based on a dual-mode optical module, where the system includes the dual-mode optical module, an optical multiplexer/demultiplexer component, and an optical switch component, where the optical multiplexer/demultiplexer component implements routing and communication of main and standby optical signals sent by the dual-mode optical module, and the optical switch component implements switching of the main and standby links by monitoring optical signal power passing through a line, thereby implementing protection of the wavelength division link.
The above embodiments of the present disclosure provide a method for implementing working wavelength path switching/wavelength division link protection.
The embodiment of the disclosure is based on a dual-mode optical module, the adopted wavelength multiplexing and demultiplexing component is in a demultiplexer + optical switch mode, and compared with a mode of adopting an optical splitter + optical switch in the related art, the embodiment of the disclosure has smaller loss, thereby reducing the requirement of optical power budget of a line.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware to implement the above embodiments, where the program may be stored in a non-transitory computer readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic or optical disk, and the like.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.

Claims (13)

1. A wavelength division link protection system is characterized by comprising a dual-mode optical module, a wavelength combining and splitting component and an optical switch component, wherein:
the dual-mode optical module is used for supporting the sending of two paths of optical signals with different wavelengths and the receiving of one path of optical signal;
the wavelength combining and splitting component is a passive device and is used for distributing two paths of optical signals sent by the dual-mode optical module to the main link and the standby link and splitting the combined wave signals passing through the optical switch component to different opposite-end optical modules; the method comprises the steps that optical signals sent by an opposite-end optical module are combined into a main link and a standby link, and combined signals are subjected to wave splitting to different dual-mode optical modules, wherein the opposite-end optical module is an optical switch side optical module;
and the optical switch component is used for detecting the link optical power of the main link and switching the service link from the main link to the standby link under the condition that the main link is interrupted.
2. The wdm link protection system of claim 1, wherein the wdm component comprises a first wdm component and a second wdm component, wherein:
the dual-mode optical module is used for sending a main optical signal to the optical switch assembly through the first multiplexer/demultiplexer assembly and the main link and sending a standby optical signal to the optical switch assembly through the first multiplexer/demultiplexer assembly and the standby link;
the optical switch assembly is used for transmitting the main optical signal to the opposite-end optical module after passing through the second wavelength multiplexing and demultiplexing assembly under the condition that the main link is a service link; and under the condition that the standby link is a service link, transmitting the standby optical signal to the opposite-end optical module after passing through the second wavelength multiplexing and demultiplexing component.
3. The WDM link protection system of claim 2,
the dual-mode optical module is connected with the first multiplexing and demultiplexing component through an optical path; the first multiplexing/demultiplexing component is connected with the optical switch component through a main link and a standby link respectively; the optical switch component is connected with the second wave-combining and splitting component through an optical path; the second wave combining and splitting component is connected with the opposite-end optical module through an optical path.
4. The WDM link protection system of claim 2 or 3,
the first wavelength multiplexing/demultiplexing component is used for distributing two paths of optical signals sent by the dual-mode optical module to the main link and the standby link; the method comprises the steps that a combined wave signal sent by an opposite-end optical module through a main link and a standby link is subjected to wave splitting to different dual-mode optical modules;
the second wavelength multiplexing and demultiplexing component is used for multiplexing signals which are sent by the dual-mode optical module and pass through the optical switch component to different opposite-end optical modules; and combining the optical signals sent by the opposite-end optical module into the optical switch assembly.
5. The WDM link protection system of claim 4, wherein the first WDM component comprises a demultiplexer, a coupler, a first demultiplexing module and a second demultiplexing module, and wherein the second WDM component comprises a third demultiplexing module, wherein:
the system comprises a dual-mode optical module, a demultiplexer, a main optical module and a standby optical module, wherein the dual-mode optical module is used for sending a main optical signal and a standby optical signal to the demultiplexer under the condition of sending a forward optical signal, and the forward optical signal is an optical signal sent to an opposite-end optical module by the dual-mode optical module;
the demultiplexer is used for sending the main optical signal to the first multiplexing and demultiplexing module and the main link and sending the standby optical signal to the second multiplexing and demultiplexing module and the standby link under the condition of sending the forward optical signal;
and the optical switch component is used for sending the main optical signal to the opposite-end optical module through the third multiplexing and demultiplexing module under the condition that the main link is a service link and sends the forward optical signal.
6. The WDM link protection system of claim 5,
and the opposite-end optical module is used for sending the reverse optical signal to the dual-mode optical module through the third multiplexing and demultiplexing module, the optical switch assembly, the main link, the first multiplexing and demultiplexing module and the coupler under the condition that the main link is a service link and the reverse optical signal is sent by the opposite-end optical module to the dual-mode optical module.
7. The WDM link protection system of claim 6,
and the optical switch component is used for detecting that the optical power of the main line is lower than a preset value and sending the standby optical signal to the opposite-end optical module through the third multiplexing and demultiplexing module under the condition that the standby link is a service link and sends the forward optical signal, so that the forward service signal is switched.
8. The WDM link protection system of claim 7,
and the opposite-end optical module is used for sending the reverse optical signal to the dual-mode optical module through the third multiplexing and demultiplexing module, the optical switch component, the standby link, the second multiplexing and demultiplexing module and the coupler under the condition that the standby link is a service link and the reverse optical signal is sent.
9. The WDM link protection system of any one of claims 1-3, wherein the optical switch assembly comprises an optical switch and an optical power detection module, wherein:
the optical power detection module is used for detecting the optical power of the main link and the standby link;
and the optical switch is used for switching the service link from the active link to the standby link under the condition that the active link is interrupted.
10. A method for wavelength division link protection, comprising:
the wavelength division multiplexing/demultiplexing component distributes two optical signals sent by the dual-mode optical module to the main link and the standby link, wherein the wavelength division multiplexing/demultiplexing component is the wavelength division multiplexing/demultiplexing component of the wavelength division link protection system according to any one of claims 1 to 10, and the wavelength division link protection system further comprises the dual-mode optical module and an optical switch component;
the optical switch component detects the link optical power of the main link, and switches the service link from the main link to the standby link under the condition that the main link is interrupted;
the wavelength combining and splitting component is used for splitting the wavelength combining signals passing through the optical switch component to different opposite-end optical modules.
11. The wavelength division link protection method according to claim 10, further comprising:
under the condition of sending a forward optical signal, the dual-mode optical module sends a main optical signal to the optical switch assembly through the first combining and splitting component and the main link, and sends a standby optical signal to the optical switch assembly through the first combining and splitting component and the standby link, wherein the combining and splitting component comprises a first combining and splitting component and a second combining and splitting component, and the forward optical signal is an optical signal sent from the dual-mode optical module to an opposite-end optical module;
under the condition that the main link is a service link, the optical switch component sends the main optical signal to the opposite-end optical module after passing through the second wavelength multiplexing and demultiplexing component;
and under the condition that the standby link is a service link, the optical switch component sends the standby optical signal to the opposite-end optical module after passing through the second wavelength multiplexing and demultiplexing component.
12. The method for protecting wavelength division links according to claim 11, wherein the dual-mode optical module sends a main optical signal to the optical switch module through the first add/drop module and the main link, and sends a backup optical signal to the optical switch module through the first add/drop module and the backup link comprises:
the dual-mode optical module sends a main optical signal and a standby optical signal to the demultiplexer, wherein the first multiplexing and demultiplexing component comprises the demultiplexer, a coupler, a first multiplexing and demultiplexing module and a second multiplexing and demultiplexing module;
the demultiplexer sends the main optical signal to the first multiplexing and demultiplexing module and the main link and sends the main optical signal to the optical switch component;
the demultiplexer sends the standby optical signal to the second multiplexing and demultiplexing module and the standby link, and sends the standby optical signal to the optical switch assembly.
13. The wavelength division link protection method according to claim 12, further comprising:
when the main link is a service link and a reverse optical signal is sent, the opposite-end optical module sends the reverse optical signal to the dual-mode optical module through the third multiplexing and demultiplexing module, the optical switch assembly, the main link, the first multiplexing and demultiplexing module and the coupler, wherein the reverse optical signal is an optical signal sent to the dual-mode optical module by the opposite-end optical module;
and under the condition that the standby link is a service link and transmits the reverse optical signal, the optical module at the opposite end transmits the reverse optical signal to the dual-mode optical module through the third multiplexing and demultiplexing module, the optical switch component, the standby link, the second multiplexing and demultiplexing module and the coupler.
CN202111304628.7A 2021-11-05 2021-11-05 Method and system for protecting wavelength division link Active CN114039697B (en)

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US20200021385A1 (en) * 2018-07-12 2020-01-16 Ayar Labs, Inc. Optical Multiplexer/Demultiplexer Module and Associated Methods
CN112929123A (en) * 2019-12-06 2021-06-08 中国电信股份有限公司 Optical transmission system, method and optical communication system
CN113395106A (en) * 2020-03-13 2021-09-14 中国电信股份有限公司 Link protection method and system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208174685U (en) * 2018-05-08 2018-11-30 沈阳炬石科技有限公司 Optical communication wire line protection device and system
US20200021385A1 (en) * 2018-07-12 2020-01-16 Ayar Labs, Inc. Optical Multiplexer/Demultiplexer Module and Associated Methods
CN110505008A (en) * 2019-08-16 2019-11-26 杭州初灵信息技术股份有限公司 Wavelength-division multiplex applied to 5G forward pass perceives protection system and perception guard method
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