Signal transmission system
By designing a signal transmission system, using the existing fiber path to connect the time-frequency synchronization master and slave unit, the problems of waste of fiber timer network resources and WDM/OTN network compatibility are solved, and efficient fiber resource utilization is achieved.
Patent Information
- Application Number
- CN202411803845.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-03-14
AI Technical Summary
The fiber timing network needs to occupy dedicated fibers for timing, resulting in wasted fiber resources. The WDM/OTN network is incompatible with the fiber timing network, making it difficult to use existing fibers for timing.
A signal transmission system is designed, and the time-frequency synchronization master and slave units are connected to the time-frequency synchronization master unit and slave unit through the first combined wavelength divider and the second combined wavelength divider, and signal transmission is performed using an existing optical path between the first optical conversion unit and the second optical conversion unit to avoid re-laying of optical fibers.
It improves the utilization rate of fiber optic resource, solves the problem of waste of fiber optic timer network resources, and realizes compatibility between WDM/OTN network and fiber optic timer network, which can effectively utilize existing fiber for timing.
Smart Images
Figure CN119628778A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of communication technology, and in particular, to a signal transmission system. Background Art
[0002] The fiber-optic timing network needs to occupy dedicated optical fibers for timing. Therefore, the construction of the fiber-optic timing network requires the re-laying of a large number of optical fibers, which will result in a waste of optical fiber resources.
[0003] The wavelength division multiplexing / optical transport network (WDM / OTN) network and the optical fiber timing network are two independent networks. How the optical fiber timing network can use the existing optical fiber in the WDM / OTN network for timing is a technical problem that needs to be solved urgently. Summary of the invention
[0004] The present application provides a signal transmission system for verifying the security of open source components.
[0005] In order to achieve the above objectives, this application adopts the following technical solutions:
[0006] In the first aspect, a signal transmission system is provided, comprising a first wavelength combiner / demultiplexer, a second wavelength combiner / demultiplexer, a time-frequency synchronization master station unit, a time-frequency synchronization slave station unit, a first optical conversion unit and a second optical conversion unit; the first input port of the first wavelength combiner / demultiplexer is connected to the time-frequency synchronization master station unit; the second input port of the first wavelength combiner / demultiplexer is connected to the first optical conversion unit; the first output port of the first wavelength combiner / demultiplexer is connected to the first input port of the second wavelength combiner / demultiplexer; the first output port of the second wavelength combiner / demultiplexer is connected to the time-frequency synchronization slave station unit; and the second output port of the second wavelength combiner / demultiplexer is connected to the second optical conversion unit.
[0007] Optionally, the second combiner / demultiplexer further includes a second input port and a third output port; the second input port of the second combiner / demultiplexer is connected to the time-frequency synchronization slave station unit; and the third output port of the second combiner / demultiplexer is connected to the first combiner / demultiplexer.
[0008] Optionally, the first combiner / demultiplexer also includes a second output port; the second output port is connected to the time-frequency synchronization master station unit.
[0009] Optionally, a third optical conversion unit is also included between the time-frequency synchronization master station unit and the first combiner / demultiplexer.
[0010] Optionally, the third optical conversion unit is used to convert the signal wavelength of the time-frequency synchronization master station unit into a first wavelength; the first wavelength is different from the wavelength of the service signal of the first optical conversion unit.
[0011] Optionally, the time-frequency synchronization master station unit and the time-frequency synchronization slave station unit are connected based on a first optical path; the first optical conversion unit and the second optical conversion unit are connected based on a second optical path; the second optical path includes the first optical path and the first symmetric optical path.
[0012] Optionally, the first optical path further includes at least one bidirectional optical amplifier.
[0013] Optionally, the first symmetrical optical path includes at least one unidirectional optical amplifier.
[0014] Optionally, the system also includes a third combiner / splitter and a fourth combiner / splitter; the number of the first optical conversion unit and the second optical conversion unit is multiple; the third combiner / splitter is located between the first optical conversion unit and the second optical path; the fourth combiner / splitter is located between the second optical conversion unit and the second optical path.
[0015] Optionally, the combining unit of the third combiner / demultiplexer is connected to the first optical path; the demultiplexing unit of the third combiner / demultiplexer is connected to the first symmetrical optical path; the demultiplexing unit of the fourth combiner / demultiplexer is connected to the first optical path; and the combining unit of the fourth combiner / demultiplexer is connected to the first symmetrical optical path.
[0016] Based on the technical solution provided by the present application, the first input port of the first combiner / demultiplexer is connected to the time-frequency synchronization master station unit; the second input port of the first combiner / demultiplexer is connected to the first optical conversion unit; the first output port of the first combiner / demultiplexer is connected to the first input port of the second combiner / demultiplexer; the first output port of the second combiner / demultiplexer is connected to the time-frequency synchronization slave station unit; and the second output port of the second combiner / demultiplexer is connected to the second optical conversion unit. That is, the first combiner / demultiplexer is respectively connected to the time-frequency synchronization master station unit and the first optical conversion unit, and the second combiner / demultiplexer is respectively connected to the time-frequency synchronization slave station unit and the second optical conversion unit. In this way, when transmitting the time-frequency signal, the existing optical path between the first optical conversion unit and the second optical conversion unit can be used for connection without re-laying the optical path, thereby improving the utilization rate of optical fiber resources.
[0017] In a second aspect, a signal transmission device is provided, which can implement the functions performed by the signal transmission device in the above-mentioned aspects or possible designs. The functions can be implemented through hardware, such as: in one possible design, the signal transmission device may include: a processor and a communication interface, and the processor can be used to support the signal transmission device to implement the functions involved in the above-mentioned first aspect or any possible design of the first aspect.
[0018] In another possible design, the signal transmission device may further include a memory for storing computer-executable instructions and data necessary for the signal transmission device. When the signal transmission device is running, the processor executes the computer-executable instructions stored in the memory, so that the signal transmission device performs the above-mentioned first aspect or any possible abnormal open source component determination method of the first aspect.
[0019] In a third aspect, a computer-readable storage medium is provided, which may be a readable non-volatile storage medium, and which stores computer instructions or programs. When the computer-readable storage medium is run on a computer, the computer can execute the above-mentioned first aspect or any possible abnormal open source component determination method of the above-mentioned aspects.
[0020] In a fourth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method for determining abnormal open source components according to the first aspect or any possible design of the above aspects.
[0021] In a fifth aspect, an electronic device is provided, the electronic device comprising one or more processors and one or more memories. The one or more memories are coupled to the one or more processors, the one or more memories are used to store computer program codes, the computer program codes include computer instructions, and when the one or more processors execute the computer instructions, the electronic device executes the abnormal open source component determination method as described in the first aspect or any possible design of the first aspect.
[0022] In a sixth aspect, a chip system is provided, the chip system including a processor and a communication interface, the chip system can be used to implement the function performed by the signal transmission device in the first aspect or any possible design of the first aspect. In one possible design, the chip system also includes a memory, the memory is used to store program instructions and / or data. The chip system can be composed of a chip, or it can include a chip and other discrete devices, without limitation. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 A schematic diagram of the structure of a WDM system provided in an embodiment of the present application;
[0024] Figure 2 A schematic diagram of the structure of an optical fiber timing system provided in an embodiment of the present application;
[0025] Figure 3 A schematic diagram of the structure of a signal transmission system provided in an embodiment of the present application;
[0026] Figure 4A schematic diagram of the structure of another signal transmission system provided in an embodiment of the present application;
[0027] Figure 5 A schematic diagram of the structure of another signal transmission system provided in an embodiment of the present application;
[0028] Figure 6 A schematic diagram of the structure of another signal transmission system provided in an embodiment of the present application;
[0029] Figure 7 A schematic diagram of the structure of another signal transmission system provided in an embodiment of the present application;
[0030] Figure 8 A schematic diagram of the structure of a signal transmission device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0031] In order to enable ordinary persons in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.
[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.
[0033] It should also be understood that the term “comprising” indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components.
[0034] Time synchronization technology plays a basic supporting role in information integration, collaborative operations, time measurement and distance measurement in 5G and vertical industries. The existing synchronization network of operators has widely supported satellite timing and high-precision time synchronization (precision time protocol, PTP) protocol. However, the synchronization accuracy of satellite timing is at the level of hundreds of nanoseconds; PTP also has the following problems: there is asymmetry in link delay that is difficult to solve; the synchronization accuracy is about tens of nanoseconds; in the case of multi-level cascading, the synchronization accuracy will decrease step by step and cannot meet the sub-nanosecond accuracy requirements. Fiber-optic time and frequency synchronization technology can achieve time synchronization deviation accuracy of sub-nanosecond or even picosecond levels. Therefore, introducing fiber-optic timing solutions to meet higher-precision time synchronization needs is an important technical means that operators can consider.
[0035] The essence of fiber optic timing is to modulate the timing signal output by the time frequency reference onto an optical carrier and use optical fiber as the transmission medium for long-distance transmission, so that the timing signals of the master and slave stations can be synchronized at the picosecond (ps) level.
[0036] The core of fiber optic time transfer is to accurately deduct the transmission delay of the fiber optic link and eliminate the impact of fiber optic link noise on time transfer. Since the delay of the optical fiber will change with factors such as temperature fluctuations and changes in the tension of the optical fiber, even if the two optical fibers are located in the same optical cable and the physical lengths of the two optical fibers are guaranteed to be exactly equal, it is still impossible to ensure that the fiber optic delays of the two optical fibers are exactly equal. Because the delay changes of the optical fiber are uncontrolled and the asymmetric errors of the dual-fiber bidirectional cannot be eliminated, the industry currently basically chooses a single-fiber bidirectional method to transmit the optical fiber timing signal, regardless of performance or cost considerations. The time information needs to be exchanged between the time and frequency synchronization master station and the slave station equipment, that is, the two-way time comparison method.
[0037] When high-precision time-frequency signals are transmitted over long distances (e.g., ≥100 km) via optical fiber, signal regeneration is an important issue, taking into account the optical fiber transmission loss. This requires the use of multiple devices and appropriate transmission methods, and relay amplification is a common method. Since single-fiber bidirectional transmission is used, the optical amplifier is required to be a bidirectional amplifier, and at the same time, the transmission delay symmetry and low noise must be ensured.
[0038] Figure 1 FIG. 1 shows a schematic diagram of the structure of a WDM system. Figure 1 As shown, the WDM system may include a first optical transform unit (OTU), a second OTU, a plurality of unidirectional optical amplifiers (which may be called relay stations), a first optical multiplexer / optical demultiplexer (OM / OD), and a second optical multiplexer / demultiplexer.
[0039] Among them, the number of the first OTU and the second OTU is multiple, which can be set according to needs without limitation.
[0040] The number of multiple unidirectional optical amplifiers can be set as needed. For example, in the optical communication path where the first OTU sends a service signal to the second OTU, the number of multiple unidirectional optical amplifiers can be 2. Figure 1 OA1 and OA2 in it.
[0041] In the optical communication path where the second OTU sends a service signal to the first OTU, the number of the multiple unidirectional optical amplifiers may be 2. For example, Figure 1 OA3 and OA4 in it.
[0042] The signal transmission process of the WDM system is described below based on S1-S5:
[0043] S1. A first OTU sends multiple service signals to a first multiplexer / demultiplexer. Correspondingly, the first multiplexer / demultiplexer receives the multiple service signals.
[0044] Each service signal may be a service signal with a different wavelength, for example, λ1, λ2, and so on.
[0045] S2. The first combiner / demultiplexer combines the received multiple service signals to obtain a combined signal.
[0046] S3: The first combiner / demultiplexer sends a combined signal to the second combiner / demultiplexer. Correspondingly, the second combiner / demultiplexer receives the combined signal.
[0047] S4. The second combiner / demultiplexer performs demultiplexing on the combined signal to obtain multiple service signals.
[0048] S5. The second multiplexer / demultiplexer sends multiple service signals to the second OTU.
[0049] Figure 2 Figure 2 shows a schematic diagram of the structure of an optical fiber timing system. Figure 2 As shown, the optical fiber timing system may include a time-frequency synchronization master station unit, a time-frequency synchronization slave station unit, and a plurality of bidirectional optical amplifiers.
[0050] The time-frequency synchronization master station unit and the time-frequency synchronization slave station unit are connected via optical fiber, and a plurality of bidirectional optical amplifiers are located between the time-frequency synchronization master station unit and the time-frequency synchronization slave station unit.
[0051] The fiber-optic timing network needs to occupy dedicated optical fibers for timing. Therefore, the construction of the fiber-optic timing network requires the re-laying of a large number of optical fibers, which will result in a waste of optical fiber resources.
[0052] The WDM / OTN network and the optical timing network are two independent networks. Moreover, the optical amplifiers in the existing WDM / OTN network are all unidirectional optical amplifiers, while optical timing transmission requires bidirectional optical amplification, and the amplifiers are not compatible. In addition, the services in the existing WDM / OTN network are all dual-fiber bidirectional (different directions of the services take different optical fiber paths), while optical timing transmission is single-fiber bidirectional, that is, the signal transmission method is different. Therefore, how the timing network can use the existing optical fiber in the WDM / OTN network for timing is a technical problem that needs to be solved urgently.
[0053] In view of this, an embodiment of the present application provides a signal transmission system, including: a first combiner / demultiplexer, a second combiner / demultiplexer, a time-frequency synchronization master station unit, a time-frequency synchronization slave station unit, a first optical conversion unit, and a second optical conversion unit; the first input port of the first combiner / demultiplexer is connected to the time-frequency synchronization master station unit; the second input port of the first combiner / demultiplexer is connected to the first optical conversion unit; the first output port of the first combiner / demultiplexer is connected to the first input port of the second combiner / demultiplexer; the first output port of the second combiner / demultiplexer is connected to the time-frequency synchronization slave station unit; and the second output port of the second combiner / demultiplexer is connected to the second optical conversion unit.
[0054] The method provided in the embodiment of the present application is described in detail below with reference to the accompanying drawings.
[0055] It should be noted that the network system described in the embodiment of the present application is to more clearly illustrate the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of network systems and the emergence of other network systems, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
[0056] Figure 3 FIG. 1 is a schematic diagram of a structure of a signal transmission system provided by an embodiment of the present application. Figure 3 As shown, the signal transmission system may include a first multiplexer / demultiplexer 11, a second multiplexer / demultiplexer 12, a time-frequency synchronization master unit 13, a time-frequency synchronization slave unit 14, a first optical conversion unit 15 and a second optical conversion unit 16.
[0057] Among them, the first input port of the first combiner / demultiplexer 11 is connected to the time-frequency synchronization master station unit 13; the second input port of the first combiner / demultiplexer 11 is connected to the first optical conversion unit 15; the first output port of the first combiner / demultiplexer 11 is connected to the first input port of the second combiner / demultiplexer 12.
[0058] The first output port of the second wavelength combiner / demultiplexer 12 is connected to the time-frequency synchronization slave station unit 14 ; the second output port of the second wavelength combiner / demultiplexer 12 is connected to the second optical conversion unit 16 .
[0059] The first input port of the first multiplexer / demultiplexer 11 is used to receive the time-frequency synchronization signal of the time-frequency synchronization master station unit 13. The second input port of the first multiplexer / demultiplexer 11 is used to receive the service signal of the first optical conversion unit 15.
[0060] The first combiner / demultiplexer 11 is used to combine the time synchronization signal from the time-frequency synchronization master station unit 13 and the service signal from the first optical conversion unit 15 to obtain a combined signal.
[0061] The first output port of the first combiner / demultiplexer 11 can be used to send a combined signal to the second combiner / demultiplexer 12. Correspondingly, the second combiner / demultiplexer 12 can receive the combined signal based on its first input port.
[0062] The second combiner / demultiplexer 12 can be used to demultiplex the combined signal to obtain a time synchronization signal and a service signal, and send the time synchronization signal to the time-frequency synchronization slave station unit 14 based on the first output port, and send the service signal to the second optical conversion unit 16 based on the second output port.
[0063] Based on the technical solution provided by the present application, the first input port of the first combiner / demultiplexer 11 is connected to the time-frequency synchronization master station unit 13; the second input port of the first combiner / demultiplexer 11 is connected to the first optical conversion unit 15; the first output port of the first combiner / demultiplexer 11 is connected to the first input port of the second combiner / demultiplexer 12; the first output port of the second combiner / demultiplexer 12 is connected to the time-frequency synchronization slave station unit 14; and the second output port of the second combiner / demultiplexer 12 is connected to the second optical conversion unit 16. That is, the first combiner / demultiplexer 11 is connected to the time-frequency synchronization master station unit 13 and the first optical conversion unit 15, respectively, and the second combiner / demultiplexer 12 is connected to the time-frequency synchronization slave station unit 14 and the second optical conversion unit 16, respectively. In this way, when transmitting the time-frequency signal, the existing optical path between the first optical conversion unit 15 and the second optical conversion unit 16 can be used for connection without re-laying the optical path, thereby improving the utilization rate of optical fiber resources.
[0064] In one possible design, the second combiner / demultiplexer 12 also includes a second input port and a third output port; the second input port of the second combiner / demultiplexer 12 is connected to the time-frequency synchronization slave station unit 14; and the third output port of the second combiner / demultiplexer 12 is connected to the first combiner / demultiplexer 11.
[0065] The second combiner / demultiplexer 12 further includes a second input port for receiving a time-frequency synchronization reply signal from the time-frequency synchronization slave unit 14. The third output port of the second combiner / demultiplexer 12 is used to send a time-frequency synchronization reply signal to the first combiner / demultiplexer 11, so that the first combiner / demultiplexer 11 sends a time-frequency synchronization reply signal to the time-frequency synchronization master unit 13.
[0066] In another possible design, the first combiner / demultiplexer 11 further includes a second output port; the second output port is connected to the time-frequency synchronization master station unit 13.
[0067] The second output port is used to send the time-frequency synchronization reply signal from the time-frequency synchronization slave unit 14 to the time-frequency synchronization master unit 13 .
[0068] In another possible design, Figure 4 FIG. 2 is a schematic diagram showing the structure of another signal transmission system provided by an embodiment of the present application. Figure 4 As shown, the signal transmission system further includes a third optical conversion unit 17 between the time-frequency synchronization master station unit 13 and the first multiplexer / demultiplexer 11 , and a fourth optical conversion unit 18 between the time-frequency synchronization slave station unit 14 and the second multiplexer / demultiplexer 12 .
[0069] The third optical conversion unit 17 is used to convert the signal wavelength of the time-frequency synchronization master station unit 13 into the first wavelength. The fourth optical conversion unit 18 is used to convert the signal wavelength of the time-frequency synchronization slave station unit 14 into the first wavelength.
[0070] It should be noted that the first wavelength is different from the wavelength of the service signal of the first optical conversion unit 15 .
[0071] The specific value of the first wavelength can be set as needed. For example, it can be λ clk That is, the wavelength is only used to transmit the time-frequency synchronization signal and no longer transmits the service signal. The time-frequency synchronization signal needs to occupy a specific wavelength in the service channel. The transmission method of the service signal of the WDM / OTN system remains unchanged (except that λclk cannot be used).
[0072] When the time-frequency synchronization master station unit 13 is connected to the WDM / OTN system, it needs to go through OTU wavelength conversion to convert the wavelength into λclk.
[0073] In this way, it can be ensured that the time-frequency synchronization signal and the service signal occupy different wavelength channels for signal transmission, thereby avoiding transmission conflicts between the time-frequency synchronization signal and the service signal.
[0074] In another possible design, Figure 5 FIG. 2 is a schematic diagram showing the structure of another signal transmission system provided by an embodiment of the present application. Figure 5 As shown, the time-frequency synchronization master station unit 13 and the time-frequency synchronization slave station unit 14 are connected based on the second optical path 19; the first optical conversion unit 15 and the second optical conversion unit 16 are connected based on the second optical path; the second optical path includes the second optical path 19 and the first symmetrical optical path 20.
[0075] The second optical path 19 and the second optical path are optical fiber communication links.
[0076] It should be noted that the time-frequency synchronization master station unit 13 and the time-frequency synchronization slave station unit 14 can be connected to each other via a single-fiber bidirectional communication based on the second optical path 19 .
[0077] For example, the time-frequency synchronization master unit 13 can send a time-frequency synchronization signal to the time-frequency synchronization slave unit 14 based on the second optical path 19. The time-frequency synchronization slave unit 14 can send a time-frequency synchronization reply signal to the time-frequency synchronization master unit 13 based on the second optical path 19.
[0078] In one example, based on the second optical channel 19, the time-frequency synchronization signal and the time-frequency synchronization slave station unit 14 can send bidirectional interactive information through time-division multiplexing (TDM).
[0079] It should be noted that the first optical conversion unit 15 and the second optical conversion unit 16 can be connected to each other by dual-fiber bidirectional communication based on the second optical path.
[0080] For example, the first optical conversion unit 15 may send a service signal to the second optical conversion unit 16 based on the second optical path 19. The second optical conversion unit 16 may send a service reply signal to the first optical conversion unit 15 based on the symmetric optical path.
[0081] In an example, based on the second optical path 19 , the first optical conversion unit 15 can send a service signal to the second optical conversion unit 16 by using wavelength division multiplexing technology.
[0082] Correspondingly, based on the first symmetrical optical path 20 , the second optical conversion unit 16 can send a service reply signal to the first optical conversion unit 15 by using wavelength division multiplexing technology.
[0083] In another possible design, Figure 6 FIG. 2 is a schematic diagram showing the structure of another signal transmission system provided by an embodiment of the present application. Figure 6 As shown, the second optical path 19 further includes at least one bidirectional optical amplifier 21 , and the first symmetrical optical path 20 includes at least one unidirectional optical amplifier 22 .
[0084] The number of the bidirectional optical amplifiers 21 can be set as required, for example, two, etc. The bidirectional optical amplifier 21 is located between the first wavelength combiner / demultiplexer 11 and the second wavelength combiner / demultiplexer 12 .
[0085] It should be noted that the bidirectional optical amplifier 21 can enhance the signal strength of the combined signal when receiving the combined signal from the first combiner / demultiplexer 11 , and send the combined signal with enhanced signal strength to the second combiner / demultiplexer 12 .
[0086] The bidirectional optical amplifier 21 can also enhance the signal strength of the time-frequency synchronization reply signal when receiving the time-frequency synchronization reply signal from the second combiner / demultiplexer 12, and send the enhanced time-frequency synchronization reply signal to the first combiner / demultiplexer 11.
[0087] It should be noted that the unidirectional optical amplifier 22 can enhance the signal strength of the service reply signal when receiving the service reply signal from the second combiner / demultiplexer 12 , and send the service reply signal with enhanced signal strength to the first optical conversion unit 15 .
[0088] In another possible design, Figure 7 FIG. 2 is a schematic diagram showing the structure of another signal transmission system provided by an embodiment of the present application. Figure 7 As shown, the system further includes a third wavelength combiner / demultiplexer 23 and a fourth wavelength combiner / demultiplexer 24; and the number of the first optical conversion unit 15 and the second optical conversion unit 16 is plural.
[0089] The third combiner / demultiplexer 23 is located between the first optical conversion unit 15 and the second optical path; the fourth combiner / demultiplexer 24 is located between the second optical conversion unit 16 and the second optical path.
[0090] The combining unit of the third combiner / splitter 23 is connected to the second optical path 19; the demultiplexing unit of the third combiner / splitter 23 is connected to the first symmetrical optical path 20; the demultiplexing unit of the fourth combiner / splitter 24 is connected to the second optical path 19; the combining unit of the fourth combiner / splitter 24 is connected to the first symmetrical optical path 20.
[0091] It should be noted that the third combiner / demultiplexer 23 is used to receive multiple service signals from the first optical conversion unit 15 and perform multiplexing processing on the multiple service signals to obtain a service multiplexed signal.
[0092] It should be noted that the time-frequency synchronization master station unit 13 and the time-frequency synchronization slave station unit 14 can be connected to the WDM system as independent devices, and the board can also be developed or upgraded as a module unit in the WDM system, that is, integrated into the WDM system as an extension of the existing WDM system. In this scenario, there is no need to add additional combiners / demultiplexers, so that the WDM network can be integrated with the optical fiber timing, so that the WDM network can have the ability to transmit high-precision time-frequency synchronization signals while transmitting business signals.
[0093] Figure 7 This is just an exemplary framework diagram. Figure 7 The names of the individual devices included in the Figure 7 In addition to the functional nodes shown, other nodes may also be included, which is not limited in the embodiments of the present application.
[0094] When implementing it specifically, Figure 7Each device in the Figure 8 The structure shown, or including Figure 8 Parts shown. Figure 8 The structure diagram of a signal transmission device 200 provided in an embodiment of the present application is shown in FIG. 2 . The signal transmission device 200 may be a network device, or the signal transmission device 200 may be a chip or a system on a chip in a network device. Figure 8 As shown, the signal transmission device 200 includes a processor 201 , a communication interface 202 and a communication line 203 .
[0095] Furthermore, the signal transmission device 200 may further include a memory 204 . The processor 201 , the memory 204 and the communication interface 202 may be connected via a communication line 203 .
[0096] The processor 201 is a CPU, a general processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 201 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.
[0097] The communication interface 202 is used to communicate with other devices or other communication networks. The communication interface 202 can be a module, a circuit, a communication interface or any device capable of implementing communication.
[0098] The communication line 203 is used to transmit information between the components included in the signal transmission device 200.
[0099] The memory 204 is used to store instructions, where the instructions may be computer programs.
[0100] The memory 204 may be a read-only memory (ROM) or other types of static storage devices that can store static information and / or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.
[0101] It should be noted that the memory 204 can exist independently of the processor 201, or can be integrated with the processor 201. The memory 204 can be used to store instructions or program codes or some data, etc. The memory 204 can be located inside the signal transmission device 200, or outside the signal transmission device 200, without limitation. The processor 201 is used to execute the instructions stored in the memory 204 to implement the abnormal open source component determination method provided in the following embodiments of the present application.
[0102] In one example, the processor 201 may include one or more CPUs, for example, Figure 8 CPU0 and CPU1 in.
[0103] As an optional implementation, the signal transmission device 200 includes multiple processors, for example, Figure 8 In addition to the processor 201, a processor 205 may also be included.
[0104] It should be pointed out that Figure 8 The composition shown in the Figure 7 The limitations of each device in Figure 8 In addition to the parts shown, Figure 7 The individual devices in the Figure 8 More or fewer components, or combinations of certain components, or different arrangements of components.
[0105] In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.
[0106] In addition, the actions, terms, etc. involved in the various embodiments of the present application can refer to each other without limitation. The message name or parameter name in the message exchanged between the various devices in the embodiments of the present application is only an example, and other names can also be used in the specific implementation without limitation.
[0107] In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with substantially the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference.
[0108] It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.
[0109] In the present application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.
[0110] Combine the following Figure 7 The signal transmission system shown describes the sending process in the signal transmission method provided in the embodiment of the present application. For example, the process may include the following S11-S20:
[0111] S11, the first optical conversion unit 15 sends a plurality of service signals to the third wavelength combiner / demultiplexer. Correspondingly, the third wavelength combiner / demultiplexer receives the plurality of service signals.
[0112] There are multiple first light conversion units 15 .
[0113] S12. The third combiner / demultiplexer combines the multiple service signals to obtain a combined service signal.
[0114] S13, the third combiner / demultiplexer sends the combined service signal to the first combiner / demultiplexer 11 via the bidirectional optical amplifier.
[0115] S14, the time-frequency synchronization master station unit 13 sends a time-frequency synchronization signal to the third optical conversion unit 17. Correspondingly, the third optical conversion unit 17 receives the time-frequency synchronization signal.
[0116] S15, the third optical conversion unit 17 converts the signal wavelength of the received time-frequency synchronization signal (also called optical fiber timing signal) into the first wavelength, and sends the time-frequency synchronization signal of the first wavelength to the first wavelength combiner / demultiplexer 11. Correspondingly, the first wavelength combiner / demultiplexer 11 receives the time-frequency synchronization signal of the first wavelength.
[0117] The time-frequency synchronization signal may be a pulse-per-second signal, or may be a signal generated by the time-frequency synchronization master station unit 13, such as a satellite signal, an atomic clock signal, or a ground input reference signal.
[0118] S16. The first wavelength combiner / demultiplexer 11 combines the combined service signal and the time-frequency synchronization signal of the first wavelength to obtain a combined signal.
[0119] It should be noted that the first multiplexer / demultiplexer 11 can perform multiplexing processing on the multiplexed service signal and the time-frequency synchronization signal of the first wavelength at the optical multiplex section (OMS) level to obtain a multiplexed signal.
[0120] S17: The first combiner / demultiplexer 11 sends a combined signal to the second combiner / demultiplexer 12. Correspondingly, the second combiner / demultiplexer 12 receives the combined signal.
[0121] S18. The second combiner / demultiplexer 12 performs demultiplexing on the combined signal to obtain a time-frequency synchronization signal and a combined service signal.
[0122] S19, the second combiner / demultiplexer 12 sends a time-frequency synchronization signal to the time-frequency synchronization slave unit 14, and sends a combined service signal to the fourth combiner / demultiplexer. Accordingly, the time-frequency synchronization slave unit 14 receives the time-frequency synchronization signal, and the fourth combiner / demultiplexer receives the combined service signal.
[0123] The type of the time-frequency synchronization slave station unit 14 can be set as required, for example, it can be a terminal device, a computer, etc.
[0124] It should be noted that the time-frequency synchronization slave unit 14 can decode the time-frequency synchronization signal to obtain the time code information, delay information and second pulse position. Then, the time-frequency synchronization slave unit 14 can generate a PTP message with higher accuracy through the time code information, delay information and second pulse position, and can output the PTP message so that the PTP message can be used for timing in the existing network. In this way, the time-frequency synchronization slave unit 14 can improve the timing accuracy of the PTP technology through the time-frequency synchronization signal.
[0125] Among them, PTP messages include various types of messages, such as: PTP synchronization messages, broadcast messages, delayed response messages, etc.
[0126] S20 , the fourth wavelength combiner / demultiplexer 24 performs wavelength division processing on the combined service signal to obtain multiple service signals, and sends the multiple service signals to the second optical conversion unit 16 .
[0127] Combine the following Figure 7 The signal transmission system shown describes the return process of the service signal in the signal transmission method provided in the embodiment of the present application. For example, the process may include the following S21-S24:
[0128] S21: The second optical conversion unit 16 sends a plurality of service reply signals to the fourth wavelength combiner / demultiplexer 24. Correspondingly, the fourth wavelength combiner / demultiplexer 24 receives the plurality of service reply signals.
[0129] There are multiple first light conversion units 15 .
[0130] S22. The fourth combiner / demultiplexer 24 combines the multiple service reply signals to obtain a combined service reply signal.
[0131] S23: The fourth wavelength combiner / demultiplexer 24 sends the combined service reply signal to the third wavelength combiner / demultiplexer 23 via the optical amplifier. Correspondingly, the third wavelength combiner / demultiplexer 23 receives the combined service reply signal.
[0132] S24 , the third multiplexer / demultiplexer 23 demultiplexes the multiplexed service reply signal to obtain a plurality of service reply signals, and sends the plurality of service reply signals to the first optical conversion unit 15 .
[0133] Combine the following Figure 7 The signal transmission system shown describes the return process of the time-frequency synchronization signal in the signal transmission method provided in the embodiment of the present application. For example, the process may include the following S31-S34:
[0134] S31, the time-frequency synchronization master station unit 13 sends a time-frequency synchronization reply signal to the third optical conversion unit 17. Correspondingly, the third optical conversion unit 17 receives the time-frequency synchronization reply signal.
[0135] S32: The third optical conversion unit 17 converts the signal wavelength of the received time-frequency synchronization reply signal into the first wavelength, and sends the time-frequency synchronization reply signal of the first wavelength to the second wavelength combiner / demultiplexer 12. Accordingly, the second wavelength combiner / demultiplexer 12 receives the time-frequency synchronization reply signal of the first wavelength.
[0136] S33: The second combiner / demultiplexer 12 sends a time-frequency synchronization reply signal to the first combiner / demultiplexer 11 via the bidirectional optical amplifier. Correspondingly, the first combiner / demultiplexer 11 receives the time-frequency synchronization reply signal.
[0137] S34. The first multiplexer / demultiplexer 11 sends a plurality of service signals to the time-frequency synchronization unit.
[0138] The embodiment of the present application can divide the signal transmission device into functional modules or functional units according to the above method example. For example, each functional module or functional unit can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules or functional units. Among them, the division of modules or units in the embodiment of the present application is schematic, which is only a logical function division, and there may be other division methods in actual implementation.
[0139] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The computer-readable storage medium can be an internal storage unit of the signal transmission device (including a data transmitting end and / or a data receiving end) of any of the above embodiments, such as a hard disk or memory of the signal transmission device. The above computer-readable storage medium can also be an external storage device of the above terminal device, such as a plug-in hard disk equipped on the above terminal device, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above computer-readable storage medium can also include both the internal storage unit of the above signal transmission device and an external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above signal transmission device. The above computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.
[0140] It should be noted that the terms "first" and "second" in the specification, claims and drawings of the present application are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.
[0141] It should be understood that in the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.
[0142] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.
[0143] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
[0144] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
[0145] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0146] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks or optical disks.
[0147] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A signal transmission system, characterized in that: It includes a first wavelength combiner / demultiplexer, a second wavelength combiner / demultiplexer, a time-frequency synchronization master station unit, a time-frequency synchronization slave station unit, a first optical conversion unit, and a second optical conversion unit; The first input port of the first combiner / demultiplexer is connected to the time-frequency synchronization master station unit; the second input port of the first combiner / demultiplexer is connected to the first optical conversion unit; the first output port of the first combiner / demultiplexer is connected to the first input port of the second combiner / demultiplexer; The first output port of the second combiner / demultiplexer is connected to the time-frequency synchronization slave station unit; the second output port of the second combiner / demultiplexer is connected to the second optical conversion unit.
2. The system according to claim 1, characterized in that The second combiner / demultiplexer also includes a second input port and a third output port; The second input port of the second combiner / demultiplexer is connected to the time-frequency synchronization slave station unit; the third output port of the second combiner / demultiplexer is connected to the first combiner / demultiplexer.
3. The system according to claim 1, characterized in that The first combiner / demultiplexer further includes a second output port; The second output port is connected to the time-frequency synchronization master station unit.
4. The system according to any one of claims 1 to 3, characterized in that: A third optical conversion unit is also included between the time-frequency synchronization master station unit and the first combiner / demultiplexer.
5. The system according to claim 4, characterized in that The third optical conversion unit is used to convert the signal wavelength of the time-frequency synchronization master station unit into a first wavelength; the first wavelength is different from the wavelength of the service signal of the first optical conversion unit.
6. The system according to claim 1, characterized in that The time-frequency synchronization master station unit is connected to the time-frequency synchronization slave station unit based on a first optical path; The first light conversion unit and the second light conversion unit are connected based on a second light path; the second light path includes the first light path and a first symmetric light path.
7. The system according to claim 6, characterized in that The first optical path also includes at least one bidirectional optical amplifier.
8. The system according to claim 6, characterized in that The first symmetrical optical path includes at least one unidirectional optical amplifier.
9. The system according to claim 6, characterized in that The system further includes a third wavelength combiner / demultiplexer and a fourth wavelength combiner / demultiplexer; the number of the first optical conversion unit and the second optical conversion unit is multiple; The third combiner / demultiplexer is located between the first optical conversion unit and the second optical path; The fourth wavelength combiner / demultiplexer is located between the second optical conversion unit and the second optical path.
10. The system according to claim 9, characterized in that The combining unit of the third combiner / demultiplexer is connected to the first optical path; the demultiplexing unit of the third combiner / demultiplexer is connected to the first symmetrical optical path; The demultiplexing unit of the fourth multiplexer / demultiplexer is connected to the first optical path; the combining unit of the fourth multiplexer / demultiplexer is connected to the first symmetrical optical path.
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Signal transmission system
WO2026119305A1