Light splitting type line protection system with double-end switching capability

Abstract

The utility model relates to a light splitting type line protection system with double-end switching capability. The system at least comprises two light-splitting single-end switching devices, and each light-splitting single-end switching device comprises a light-splitting single-end switching main body and a switching synchronization module. The light splitting single-end switching main body at least comprises a transmitting end unit and a receiving end unit, the transmitting end unit and the receiving end unit are both adaptively connected with the main light path and the standby light path, the transmitting end unit and the receiving end unit are both connected with the switching synchronization module, and the receiving end unit at least comprises an optical switch; for two light-splitting single-end switching devices in the same light-splitting type line protection system, corresponding optical switches in the two light-splitting single-end switching devices work in the same optical channel state based on the switching synchronization module of each light-splitting single-end inversion device. According to the utility model, the double-end synchronous switching can be realized, the index advantage of the original switching time delay is maintained, and the application requirement of the power relay protection service can be met.

Description

Technical Field

[0001] This utility model relates to a beam splitting line protection system, and more particularly to a beam splitting line protection system with dual-end switching capability. Background Technology

[0002] For a normally functioning optical transmission system, the transmission signal is transmitted through the primary optical path. When the primary optical path or one of the optical fiber channels in the primary optical path fails and causes a communication interruption, the automatic switching protection device for the optical fiber line can promptly detect the optical fiber channel failure, issue an alarm message, and automatically switch the transmission loop to the backup optical path so that the communication of the optical transmission system can be restored immediately.

[0003] As explained above, the line protection system based on the automatic fiber optic line switching protection device is independent of the communication transmission system and is entirely built on the physical fiber optic cable link. Specifically, when the fiber loss in the primary optical path increases, leading to a decrease in communication quality, or when the fiber in the primary optical path is blocked, the line protection system can automatically switch the optical transmission system from the primary optical path to the backup optical path in real time, realizing the switching protection of the fiber optic cable line. This greatly improves the availability of the fiber optic cable line, enhances the reliability of the optical transmission system, and ensures service quality.

[0004] Currently, commonly used optical fiber line auto switch protection equipment (OLP) types are divided into single-end switching type (1+1 type) and double-end switching type (1:1 type). The following is a detailed explanation of the single-end switching type and the double-end switching type:

[0005] For a dual-end switching type fiber optic line automatic switching protection device, at the TX end, the service signal is selectively transmitted to the primary route and the backup route through an optical switch. At the receiving end, the service signal of the primary route or the service signal of the backup route is selectively received through an optical switch, thereby realizing rapid protection switching of services.

[0006] The double-ended switching type of automatic fiber optic line switching protection device can realize double-ended switching of fiber optic lines, so that service signals can be carried on the same optical cable during line switching. Since optical switches are used at both the transmitting and receiving ends to realize service channel switching, the switching time of the double-ended switching type of automatic fiber optic line switching protection device is generally within 50ms. This switching time indicator can meet the application requirements of conventional SDH and OTN transmission systems, but it cannot meet the application requirements of relay protection services.

[0007] For a single-ended switching type of fiber optic line automatic transfer protection device, at the TX (transmit) end, a splitter transmits the service signal to the primary route and the backup route respectively. At the receiving end, an optical switch selectively receives the service signal from either the primary route or the backup route, thereby achieving rapid protection switching of the service signal. Since the single-ended switching type of fiber optic line automatic transfer protection device uses an optical switch for switching only at one end, the required switching time is relatively low, generally within 25ms. This switching time specification is suitable for the power industry. The single-ended switching type of fiber optic line automatic transfer protection device can achieve protection of relay protection service optical signals.

[0008] Specifically, during rapid protection switching of service signals, if the fiber core in the primary optical path is interrupted, the service will automatically switch to the backup fiber core, while the fiber core that has not experienced a fault will maintain its original working route. When the corresponding optical cable channel lengths of the primary optical path and the backup optical path differ significantly, the transmission delay will differ due to the different service transmission paths, causing malfunctions in service equipment and having a very serious impact. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a split-type line protection system with dual-end switching capability. It can achieve dual-end synchronous switching and maintain the original advantages in switching delay performance, thus meeting the application requirements of power relay protection services.

[0010] According to the technical solution provided by this utility model, a split-type line protection system with dual-end switching capability is provided. The split-type line protection system includes at least two split-type single-end switching devices, which are connected via a primary optical path and a backup optical path.

[0011] The single-end switching device includes a single-end switching body and a switching synchronization module adapted and connected to the single-end switching body.

[0012] The main body of the optical splitter single-ended switching includes at least a transmitting unit and a receiving unit. Both the transmitting unit and the receiving unit are adapted and connected to the main optical path and the backup optical path, and both the transmitting unit and the receiving unit are connected to the switching synchronization module. The receiving unit includes at least one optical switch.

[0013] For two single-ended switching devices within the same optical splitting line protection system, based on the switching synchronization module of each single-ended switching device, the corresponding optical switches in the two single-ended switching devices operate in the same optical channel state.

[0014] The transmitting unit includes at least a multiplexer and a splitter adapted to and connected to the multiplexer, and the receiving unit further includes a demultiplexer adapted to and connected to an optical switch.

[0015] The multiplexer is connected to the switching synchronization module, and the multiplexer is adapted to the main optical path and the backup optical path through the optical splitter;

[0016] The deflector is connected to the switching synchronization module, and the deflector is adapted to the main optical path and the backup optical path through an optical switch.

[0017] The switching synchronization module includes a synchronization control module, a synchronization conversion processing module, an optical path processing module, and an optical cutting function board.

[0018] The synchronization control module is adapted and connected to the synchronization conversion processing module, the optical path processing module, and the optical cutting function board.

[0019] The synchronous conversion processing module is also connected to the demodulator and the optical path processing module;

[0020] The optical path processing module generates signal light and loads the generated signal light into the multiplexer;

[0021] The optical cutting function board is connected to the optical switch to drive the optical switch to switch optical channels.

[0022] The synchronous conversion processing module includes an electro-optical conversion unit and a signal processing unit adapted and connected to the electro-optical conversion unit, wherein...

[0023] The electro-optical conversion unit includes a photoelectric conversion module and a switching light generator, wherein,

[0024] The photoelectric conversion module is adapted to connect with the deconverter and the signal processing unit to convert the switching signal light after deconversion by the deconverter into a switching electrical signal, and the converted switching electrical signal is loaded into the synchronization control module by the signal processing unit.

[0025] The switching light generator is connected to the signal processing unit and the optical path processing module. It generates the corresponding switching source light based on the switching electrical signal loaded by the signal processing unit, and loads the generated switching source light onto the optical path processing module.

[0026] The optical path processing module includes at least a wavelength conversion module and an optical signal amplifier connected in sequence, wherein...

[0027] The wavelength conversion module is connected to the switching optical generator to convert the wavelength of the switching source light generated by the switching optical generator and generate the basic switching signal light after wavelength conversion. The wavelength of the basic switching signal light is different from the wavelength of the service signal light loaded into the multiplexer.

[0028] The optical signal amplifier amplifies the switching basic signal light to generate the switching signal light after amplification.

[0029] The wavelength of the switching basic signal light is 1570nm;

[0030] When the wavelength of the switching basic signal light is 1570nm, the optical signal amplifier uses pump light with a generated wavelength of 1450nm to optically amplify the switching basic signal light.

[0031] A switching synchronization slot adapted to the switching synchronization module is set in the single-ended switching device, wherein the switching synchronization module and the switching synchronization slot are connected in a pluggable manner.

[0032] The primary optical path includes a primary optical fiber core and a primary route adapted to and connected to the primary optical fiber core;

[0033] The backup optical path includes a backup optical fiber core and a backup route adapted and connected to the backup optical fiber core.

[0034] When the corresponding optical switches in the two optical splitter single-ended switching devices are operating in the same channel state, the service signals transmitted between the two optical splitter single-ended switching devices are transmitted through the same route.

[0035] The optical switch is a 1×2 type optical switch.

[0036] The beam splitter has a first beam splitting end and a second beam splitting end, and the beam splitting ratio between the first beam splitting end and the second beam splitting end is 50:50.

[0037] The advantages of this invention are as follows: Each optical splitter single-ended switching device includes an optical splitter single-ended switching body and a switching synchronization module. The optical splitter single-ended switching body can realize the switching between the primary optical path and the backup optical path during line protection. After the primary optical path and the backup optical path are switched, a switching signal light can be generated by the switching synchronization module. After being combined by a multiplexer, the switching signal light can be transmitted to another optical splitter single-ended switching device so that the other optical splitter single-ended switching device can verify and / or process the optical channel status of the optical switch. Ultimately, the corresponding optical switches in the two optical splitter single-ended switching devices can work in the same optical channel state, thereby achieving dual-end synchronous switching while maintaining a short switching time index, which can meet the application requirements of power relay protection services. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0039] Figure 2 This is a structural block diagram of one embodiment of the switching synchronization module of this utility model.

[0040] Explanation of reference numerals in the attached diagram: 1-Single-ended switching device, 2-Multiplexer, 3-Switching synchronization module, 4-Splitter, 5-Optical switch, 6-Main optical fiber core, 7-Spare optical fiber core, 8-Demultiplexer, 9-Synchronization control module, 10-Synchronization conversion processing module, 11-Optical path processing module, 12-Optical cutting function board, 13-Electro-optical conversion unit, 14-Signal processing unit, 15-Wavelength conversion module, 16-Optical signal amplifier. Detailed Implementation

[0041] The present invention will be further described below with reference to the specific accompanying drawings and embodiments.

[0042] To achieve synchronous switching at both ends while maintaining the original advantages in switching delay performance, this invention provides a split-type line protection system with dual-end switching capability. Specifically, the split-type line protection system includes at least two split-type single-end switching devices 1, which are connected to each other via a primary optical path and a backup optical path.

[0043] The single-end switching device 1 includes a single-end switching body and a switching synchronization module 3 adapted and connected to the single-end switching body;

[0044] The main body of the optical splitter single-ended switching includes at least a transmitting unit and a receiving unit. The transmitting unit and the receiving unit are both adapted and connected to the main optical path and the backup optical path, and the transmitting unit and the receiving unit are both connected to the switching synchronization module 3. The receiving unit includes at least one optical switch 5.

[0045] For two single-ended switching devices 1 in the same optical splitting line protection system, based on the switching synchronization module 3 of each single-ended switching device 1, the corresponding optical switches 5 in the two single-ended switching devices 1 operate in the same optical channel state.

[0046] It should be understood that a split-type line protection system generally includes at least two split-type single-ended switching devices 1. Typically, two split-type single-ended switching devices 1 can be used to form a split-type line protection system. The two split-type single-ended switching devices 1 are connected by a primary optical path and a backup optical path through adaptation. The primary optical path and the backup optical path are used to realize the transmission of optical signals. The way in which the primary optical path and the backup optical path are adapted to the split-type single-ended switching device 1 to form a line protection system is consistent with the existing technology.

[0047] Specifically, the single-end switching device 1 is the fiber optic line automatic switching protection device of the single-end switching type mentioned above. At this time, the method and process of line protection performed by the single-end switching device 1 can be consistent with the existing technology. As can be seen from the above description, the single-end switching device 1 has the characteristics of the fiber optic line automatic switching protection device of the single-end switching type, such as having a shorter switching time index.

[0048] In order to achieve synchronous switching of the two single-end switching devices 1, the single-end switching device 1 of this utility model should include at least a single-end switching body and a switching synchronization module 3. The single-end switching body can realize the switching between the main optical path and the backup optical path during the line protection of the prior art. Specifically, when switching between the main optical path and the backup optical path, the optical switch 5 of the receiving unit in each single-end switching device 1 should be used to switch the optical channel, thereby realizing the switching between the main optical path and the backup optical path. The method of using the optical switch 5 in the receiving unit to realize the switching between the main optical path and the backup optical path can be consistent with the prior art.

[0049] As can be seen from the above description, in order to improve the reliability of optical transmission, after one optical splitter single-ended switching device 1 switches between the main optical path and the backup optical path through the internal optical switch 5, the other optical splitter single-ended switching device 1 in the optical splitting line protection system should perform the same switching operation. That is, the corresponding optical switches 5 in the two optical splitter single-ended switching devices 1 work in the same optical channel state. At this time, the dual-end synchronous switching of the two optical splitter single-ended switching devices 1 is realized.

[0050] To achieve synchronous switching at both ends, a switching synchronization module 3 should be installed in each single-end switching device 1. The switching synchronization module 3 enables switching interaction between the two single-end switching devices 1, thereby achieving synchronous switching at both ends between them. Specifically, the switching interaction refers to the interaction between the two single-end switching devices 1 when they can switch optical channels. Through the interaction of optical channel switching, the two single-end switching devices 1 can achieve synchronous switching at both ends. The interaction method and process of optical channel switching can be referred to the corresponding description below.

[0051] In one embodiment of this utility model, the transmitting unit includes at least a multiplexer 2 and a beam splitter 4 adapted and connected to the multiplexer 2, and the receiving unit further includes a demultiplexer 8 adapted and connected to an optical switch 5, wherein...

[0052] The multiplexer 2 is connected to the switching synchronization module 3, and the multiplexer 2 is adapted to the main optical path and the backup optical path through the splitter 4;

[0053] Deflector 8 is connected to switching synchronization module 3, and deflector 8 is adapted to the main optical path and backup optical path through optical switch 5.

[0054] Figure 1 The figure shows an embodiment of the transmitting end unit and the receiving end unit in the optical splitter single-ended switching device 1. As shown in the figure, the transmitting end unit includes a multiplexer 2 and a splitter 4. The multiplexer 2 can realize optical signal synthesis, and the splitter 4 is used to split the optical signal synthesized by the multiplexer 2. Specifically, when the multiplexer 2 performs optical signal synthesis, it mainly synthesizes the service signal light and the switching signal light. After the multiplexer 2 performs optical signal synthesis, it can generate a synthesized signal light. The service signal light is the optical signal that needs to be transmitted, and the switching signal light is the optical signal used during switching interaction.

[0055] When the beam splitter 4 splits the synthesized signal light, the optical signals after splitting by the beam splitter 4 are sent to the main optical path and the backup optical path respectively. Therefore, the beam splitter 4 has a first splitting end and a second splitting end. Specifically, the splitting ratio of the first splitting end and the second splitting end is 50:50, that is, the beam splitter 4 can uniformly split the synthesized signal light. The beam splitter 4 can also adopt the commonly used form. The way the beam splitter 4 splits the synthesized signal light and connects it with the main optical path and the backup optical path can be consistent with the existing technology.

[0056] The optical switch 5 can be a 1×2 type optical switch, that is, the same type of optical switch 5 used in existing fiber optic line automatic switching protection devices with single-ended switching. To enable switching interaction, the receiving unit of this invention should also include a demultiplexer 8. The demultiplexer 8 is used to demultiplex the synthesized signal light, that is, to decompose the synthesized signal light into service signal light and switching signal light. Therefore, the demultiplexing of the demultiplexer 8 is the reverse process of the optical signal synthesis of the multiplexer 2. Thus, the corresponding demultiplexer 8 can be selected according to the type of the multiplexer 2. The demultiplexer 8 is adapted and connected to the optical switch 5, and the demultiplexer 8 is also connected to the switching synchronization module 3 to load the demultiplexed switching signal light into the switching synchronization module 3.

[0057] Figure 1 The image illustrates an embodiment of a beam splitter single-ended switching device 1 connected using a primary optical path and a backup optical path, which is also an embodiment of a beam splitter line protection system. Figure 1 In the process, two single-ended switching devices 1 form site A and site B respectively. In site A, the multiplexer 2 is connected to the main optical path and the backup optical path through the splitter 4, and is adapted to the optical switch 5 in site B through the main optical path and the backup optical path. At the same time, the demultiplexer 8 in site A is connected to the main optical path and the backup optical path through the optical switch 5, and is adapted to the splitter 4 in site B through the main optical path and the backup optical path.

[0058] When the optical channel of optical switch 5 in site A is switched to the backup optical path, and site A sends the service signal light to site B, the switching synchronization module 3 in site A will generate a switching signal light corresponding to the current optical channel state of optical switch 5, and send the generated switching signal light to multiplexer 2, so that multiplexer 2 can combine the signals to generate a composite optical signal. After that, the light is split by splitter 4 and sent to optical switch 5 in site B through the backup optical path, so that it can be transmitted to demultiplexer 8 in site B through the optical channel of optical switch 5 in site B.

[0059] Deconductive unit 8 in site B deconstructs the received composite optical signal. The resulting service optical signal is then forwarded. The resulting switching signal light is loaded into switching synchronization module 3 in site B. Switching synchronization module 3 verifies the optical channel status of optical switch 5 in site B based on the received switching signal light. If the current optical channel status of optical switch 5 is different from the optical channel status expressed by the switching signal light, then optical switch 5 in site B is driven to perform optical channel switching.

[0060] To ensure the reliability of the dual-end switching, after optical switch 5 in site B performs optical channel switching, it also generates a switching signal light using the corresponding switching synchronization module 3. This generated switching signal light is then sent to multiplexer 2 in site B, which in turn sends the corresponding switching signal to site A. This allows site A to verify whether the optical channel state of optical switch 5 in site B is consistent with the current optical channel state of optical switch 5 in site A. It can be understood that if the optical channel states of the corresponding optical switches 5 in sites A and B are consistent, the dual-end switching is complete; otherwise, an error exists in the dual-end switching, requiring the repetition of the switching verification process or the output of an alarm message.

[0061] In one embodiment of this utility model, the main optical path includes a main optical fiber core 6 and a main route adapted to and connected to the main optical fiber core 6.

[0062] The backup optical path includes a backup optical fiber core 7 and a backup route adapted and connected to the backup optical fiber core 7.

[0063] When the corresponding optical switches 5 in the two optical splitter single-ended switching devices 1 are operating in the same channel state, the service signals transmitted between the two optical splitter single-ended switching devices 1 are transmitted through the same route.

[0064] It should be noted that, Figure 1 The primary and backup routes are not shown, but the connection and coordination between the primary optical fiber core 6 and the primary route, as well as the connection and coordination between the backup optical fiber core 6 and the backup route, can be consistent with existing technologies and will not be described in detail here.

[0065] In one embodiment of this utility model, the switching synchronization module 3 includes a synchronization control module 9, a synchronization conversion processing module 10, an optical path processing module 11, and an optical cutting function board 12, wherein...

[0066] The synchronization control module 9 is adapted and connected to the synchronization conversion processing module 10, the optical path processing module 11, and the optical cutting function board 12.

[0067] The synchronous conversion processing module 10 is also connected to the demodulator 8 and the optical path processing module 11;

[0068] The optical path processing module 11 generates signal light and loads the generated signal light onto the multiplexer 2;

[0069] The optical cutting function board 12 is connected to the optical switch 5 to drive the optical switch 5 to switch optical channels.

[0070] Figure 2 The figure shows an embodiment of the switching synchronization module 3. As can be seen from the figure, the switching control module 3 may include a synchronization control module 9, a synchronization conversion processing module 10, an optical path processing module 11, and an optical cutting and energy board 12. The synchronization control module 9 can realize the control of switching synchronization. The synchronization control module 9 can adopt a commonly used controller. The type of controller adopted by the synchronization control module 9 can be selected as needed to achieve the required switching synchronization control.

[0071] The synchronous conversion processing module 10 mainly implements synchronous conversion processing. For example, for a single-end switching device 1, after the switching signal light is obtained by the deconstructor 8, the synchronous conversion processing module 10 can be used to convert the switching signal light. For example, the switching signal light can be converted into a corresponding switching electrical signal. Then, the converted switching electrical signal is sent to the synchronous control module 9. The synchronous control module 9 compares the switching electrical signal with the optical channel state of the optical switch 5 in the current single-end switching device 1. If the optical channel state of the current optical switch 5 is inconsistent with the optical channel state corresponding to the switching electrical signal, the synchronous control module 9 can drive the optical switch 5 to switch the optical channel through the optical cutting function board 12. If the optical channel state of the current optical switch 5 is consistent with the optical channel state corresponding to the switching electrical signal, the double-end switching verification can be stopped. Alternatively, a switching electrical signal representing the optical channel state of the current optical switch 5 can be generated and converted by the synchronous conversion processing module 10. At this time, the synchronous conversion processing module 10 can generate the corresponding switching source light, that is, perform electro-optical conversion on the switching electrical signal.

[0072] As can be seen from the above description, when the synchronous conversion processing module 10 can perform optical-to-electric conversion or electro-optical conversion, when the synchronous conversion processing module 10 performs electro-optical conversion, the optical path processing module 11 can process the switching source light and generate the required switching signal light, and send the switching signal light to the multiplexer 2.

[0073] In one embodiment of this utility model, the synchronous conversion processing module 10 includes an electro-optical conversion unit 13 and a signal processing unit 14 adapted and connected to the electro-optical conversion unit 13, wherein...

[0074] The electro-optical conversion unit 13 includes a photoelectric conversion module and a switching light generator, wherein,

[0075] The photoelectric conversion module is adapted to and connected to the deconstructor 8 and the signal processing unit 14 to convert the deconstructed switching signal light of the deconstructor 8 into a switching electrical signal, and load the converted switching electrical signal into the synchronization control module 9 via the signal processing unit 14.

[0076] The switching light generator is connected to the signal processing unit 14 and the optical path processing module 11. It generates a corresponding switching source light based on the switching electrical signal loaded by the signal processing unit 14, and loads the generated switching source light into the optical path processing module 11.

[0077] Figure 2 The figure shows an embodiment of the synchronous conversion processing module 10. As can be seen from the figure, the synchronous conversion processing module 10 may include an electro-optical conversion unit 13 and a signal processing unit 14. In order to realize the above-mentioned electro-optical conversion and optical-electrical conversion, the electro-optical conversion unit 13 should include a photoelectric conversion module and a switching light generator.

[0078] In specific implementation, the photoelectric conversion module should be adapted and connected to the deflector 8 and the signal processing unit 14. The switching signal light obtained after deflection by the deflector 8 can be loaded into the photoelectric conversion module so that the corresponding switching electrical signal can be obtained after photoelectric conversion by the photoelectric conversion module. The signal processing unit 14 can load the switching electrical signal into the synchronization control module 9. Specifically, the photoelectric conversion module can adopt the existing commonly used photoelectric conversion form. The processing of the switching electrical signal by the signal processing unit 14 can be necessary processing such as filtering and shaping. The signal processing unit 14 can adopt the existing commonly used form to meet the requirements of processing the switching electrical signal and sending it to the synchronization control module 9.

[0079] The switching light generator is mainly used to generate switching source light. When generating switching source light, the switching light generator should receive the switching electrical signal loaded by the signal processing unit 14. After that, the corresponding switching source light can be generated based on the switching electrical signal. The switching light generator can adopt the commonly used form, as long as it can generate the corresponding switching source light according to the switching electrical signal.

[0080] It should be noted that the switching electrical signal loaded by the signal processor 14 should be generated by the synchronization control module 9 according to the optical channel status of the optical switch 5 in the single-ended switching device 1. After the switching light generator generates the switching source light, in order to obtain the switching signal light, the switching source light should be sent to the optical path processing module 11. That is, the corresponding switching signal light can only be generated after the optical path processing module 11 processes the switching source light.

[0081] In one embodiment of this utility model, the optical path processing module 11 includes at least a wavelength conversion module 15 and an optical signal amplifier 16 connected in sequence.

[0082] The wavelength conversion module 15 is connected to the switching optical generator to convert the wavelength of the switching source light generated by the switching optical generator and generate the basic switching signal light after wavelength conversion. The wavelength of the basic switching signal light is different from the wavelength of the service signal light loaded into the multiplexer 2.

[0083] The optical signal amplifier 16 optically amplifies the switching basic signal light to generate the switching signal light after optical amplification.

[0084] Figure 2 An embodiment of the optical path processing module 11 is shown in the figure. As can be seen from the figure, the optical path processing module 11 may include a wavelength conversion module 15 and an optical signal amplifier 16. As described above, the switching source light is loaded into the optical path processing module 11. When processing the switching source light, the wavelength conversion module 15 is first used to convert the wavelength of the switching source light. After that, a basic switching signal light can be generated. That is, the wavelength of the basic switching signal light should be different from the wavelength of the switching source light, and the wavelength of the basic switching signal light should also be different from the wavelength of the service signal light, so as to meet the requirements of the multiplexer 2 for optical signal synthesis and the demultiplexer 8 for demultiplexing.

[0085] In practical implementation, the specifications of the combiner 2 and the demultiplexer 8 should preferably be selected within the 1271nm to 1610nm band, which can cover the needs of commonly used relay protection services, SDH services, and OTN services in power communication systems. Furthermore, the wavelength of the switching basic signal light should preferably be 1570nm; wherein, when the wavelength of the switching basic signal light is 1570nm, the optical signal amplifier 16 uses pump light with a generated wavelength of 1450nm to optically amplify the switching basic signal light.

[0086] Specifically, the wavelength conversion module 15 can generally be made using a GN1159 chip. When the wavelength conversion module 15 is made using a GN1159 chip, the specific method of implementing wavelength conversion can be consistent with existing technologies, as long as it can meet the actual wavelength conversion requirements. In addition, the optical signal amplifier 16 can also adopt commonly used forms, specifically to enable optical amplification of the switching basic signal light.

[0087] Furthermore, a switching synchronization slot adapted to the switching synchronization module 3 is provided in the single-ended switching device 1, wherein the switching synchronization module 3 and the switching synchronization slot are connected in a pluggable manner.

[0088] It should be noted that when the switching synchronization module 3 and the switching synchronization slot are connected in a pluggable manner, the switching synchronization module 3 can be replaced according to the actual application requirements. Different wavelengths of switching signal light can be obtained when the switching synchronization module 3 is different.

[0089] As explained above, optical switch 5 can be a 1×2 type optical switch. Therefore, the switching signal light of different wavelengths should be able to characterize the optical channel state of the subsequent indicator optical switch 5. In specific implementation, the corresponding switching signal light can be generated based on the optical channel state of optical switch 5. Subsequently, another beam splitter single-ended switching device 1 can perform optical channel verification and switching processing of optical switch 5 based on the switching signal light.

Claims

1. A split-type line protection system with dual-end switching capability, characterized in that, The optical splitting line protection system includes at least two optical splitting single-ended switching devices, which are connected via a primary optical path and a backup optical path adapter. The single-end switching device includes a single-end switching body and a switching synchronization module adapted and connected to the single-end switching body. The main body of the optical splitter single-ended switching includes at least a transmitting unit and a receiving unit. Both the transmitting unit and the receiving unit are adapted and connected to the main optical path and the backup optical path, and both the transmitting unit and the receiving unit are connected to the switching synchronization module. The receiving unit includes at least one optical switch. For two single-ended switching devices within the same optical splitting line protection system, based on the switching synchronization module of each single-ended switching device, the corresponding optical switches in the two single-ended switching devices operate in the same optical channel state.

2. The splitter-type line protection system with dual-end switching capability according to claim 1, characterized in that: The transmitting unit includes at least a multiplexer and a splitter adapted to and connected to the multiplexer, and the receiving unit further includes a demultiplexer adapted to and connected to an optical switch. The multiplexer is connected to the switching synchronization module, and the multiplexer is adapted to the main optical path and the backup optical path through the optical splitter; The deflector is connected to the switching synchronization module, and the deflector is adapted to the main optical path and the backup optical path through an optical switch.

3. The splitter-type line protection system with dual-end switching capability according to claim 2, characterized in that: The switching synchronization module includes a synchronization control module, a synchronization conversion processing module, an optical path processing module, and an optical cutting function board. The synchronization control module is adapted and connected to the synchronization conversion processing module, the optical path processing module, and the optical cutting function board. The synchronous conversion processing module is also connected to the demodulator and the optical path processing module; The optical path processing module generates signal light and loads the generated signal light into the multiplexer; The optical cutting function board is connected to the optical switch to drive the optical switch to switch optical channels.

4. The optical splitter line protection system with dual-end switching capability according to claim 3, characterized in that: The synchronous conversion processing module includes an electro-optical conversion unit and a signal processing unit adapted and connected to the electro-optical conversion unit, wherein... The electro-optical conversion unit includes a photoelectric conversion module and a switching light generator, wherein, The photoelectric conversion module is adapted to connect with the deconverter and the signal processing unit to convert the switching signal light after deconversion by the deconverter into a switching electrical signal, and the converted switching electrical signal is loaded into the synchronization control module by the signal processing unit. The switching light generator is connected to the signal processing unit and the optical path processing module. It generates the corresponding switching source light based on the switching electrical signal loaded by the signal processing unit, and loads the generated switching source light onto the optical path processing module.

5. The split-type line protection system with dual-end switching capability according to claim 4, characterized in that: The optical path processing module includes at least a wavelength conversion module and an optical signal amplifier connected in sequence, wherein... The wavelength conversion module is connected to the switching optical generator to convert the wavelength of the switching source light generated by the switching optical generator and generate the basic switching signal light after wavelength conversion. The wavelength of the basic switching signal light is different from the wavelength of the service signal light loaded into the multiplexer. The optical signal amplifier amplifies the switching basic signal light to generate the switching signal light after amplification.

6. The split-type line protection system with dual-end switching capability according to claim 5, characterized in that: The wavelength of the switching basic signal light is 1570nm; When the wavelength of the switching basic signal light is 1570nm, the optical signal amplifier uses pump light with a generated wavelength of 1450nm to optically amplify the switching basic signal light.

7. The splitter-type line protection system with dual-end switching capability according to claim 1, characterized in that: in The single-ended switching device is equipped with a switching synchronization slot that is compatible with the switching synchronization module. The switching synchronization module and the switching synchronization slot are connected in a pluggable manner.

8. The splitter-type line protection system with dual-end switching capability according to any one of claims 1 to 7, characterized in that: The primary optical path includes a primary optical fiber core and a primary route adapted to and connected to the primary optical fiber core; The backup optical path includes a backup optical fiber core and a backup route adapted and connected to the backup optical fiber core. When the corresponding optical switches in the two optical splitter single-ended switching devices are operating in the same channel state, the service signals transmitted between the two optical splitter single-ended switching devices are transmitted through the same route.

9. The split-type line protection system with dual-end switching capability according to any one of claims 1 to 7, characterized in that: The optical switch is a 1×2 type optical switch.

10. The split-type line protection system with dual-end switching capability according to any one of claims 2 to 5, characterized in that: The beam splitter has a first beam splitting end and a second beam splitting end, and the beam splitting ratio between the first beam splitting end and the second beam splitting end is 50:50.

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