CN114244447B - Intelligent feedback system with configurable modulation depth - Google Patents
Intelligent feedback system with configurable modulation depth Download PDFInfo
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- CN114244447B CN114244447B CN202210173664.2A CN202210173664A CN114244447B CN 114244447 B CN114244447 B CN 114244447B CN 202210173664 A CN202210173664 A CN 202210173664A CN 114244447 B CN114244447 B CN 114244447B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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- H—ELECTRICITY
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- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
- H04J14/021—Reconfigurable arrangements, e.g. reconfigurable optical add/drop multiplexers [ROADM] or tunable optical add/drop multiplexers [TOADM]
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Abstract
The application relates to the technical field of submarine cable systems, provides an intelligent feedback system that modulation depth can be joined in marriage, intelligent feedback system includes: the device comprises a receiving demodulation unit, a core control unit, a multi-path pumping unit and an amplifier; the demodulation unit is connected with a command transmitting end of the end station equipment, and is configured to receive an instruction signal and preprocess the instruction signal; the core control unit is connected with the demodulation unit and is configured to receive the preprocessed received instruction signal sent by the demodulation unit, analyze the preprocessed instruction signal to obtain modulation depth and generate a feedback instruction according to the modulation depth information; the electrical signal input ends of the multiple pumping units are connected with the core control unit, the optical signal output ends of the multiple pumping units are connected with the amplifier, and the feedback instructions are transmitted back to the end station equipment through the amplifier.
Description
Technical Field
The application relates to the technical field of submarine cable systems, in particular to an intelligent feedback system with configurable modulation depth.
Background
The submarine cable system comprises two parts, namely underwater equipment and above-water equipment, wherein the underwater equipment is buried at the seabed and comprises a Repeater (RPT), a Branching Unit (BU), a Reconfigurable Optical Add/Drop Multiplexer (ROADM) and a connecting cable; the marine Equipment is located on land and comprises power supply Equipment, a Network Management System (NMS), Submarine Line Terminating Equipment (SLTE) and Submarine cable monitoring Equipment (SLM).
The early submarine cable system only has a Command function, that is, an end station device is utilized to issue an operation instruction to an underwater device, an instruction signal is coded and modulated in a service and transmitted to the underwater device along with a submarine optical cable, the underwater device receiving the instruction can execute corresponding operation after being correctly decoded, for the Command execution condition, the end station device cannot acquire the Command execution condition, and a user can only judge whether the current working state meets the Command execution expectation through the end station service condition.
In order to realize intelligent monitoring of underwater equipment and meet various requirements of customers on safety, controllability and flexibility, the full-network state of a submarine cable is accurately presented, a service level is allowed to be flexibly configured, rapid positioning and disaster recovery processing under a fault scene are supported, an intelligent feedback scheme of the underwater equipment is developed to realize intelligent monitoring of a submarine cable system, when terminal station equipment initiates a query instruction, the underwater equipment can report the self state to line monitoring equipment through a Response function, and users and maintenance personnel can visually obtain the working state of the underwater equipment on a network management interface.
The realization of the intelligent monitoring of the submarine cable system mainly depends on the application of two key technologies of Command and Response (C & R for short). As shown in fig. 1, which is a schematic diagram of an intelligent monitoring network for submarine cable underwater equipment, when the working state of the underwater equipment needs to be queried or configured, a submarine cable user issues a Command instruction through an intelligent network management interface, and transmits the Command instruction with service light. And after receiving the instruction, the underwater equipment executes corresponding action, modulates Response feedback information onto service light, and finally reports the modulated Response feedback information to a network management interface, so that a user can intuitively judge whether the instruction is executed correctly or not. For the Response function, an appropriate modulation depth is a key parameter index, and it is disadvantageous that the sea cable service transmission distance and the signal demodulation capability of the end station monitoring equipment are required to be integrated in the modulation depth determination. Since the submarine cable service has the customization characteristic, the requirements of different systems on the modulation depth are different.
The intelligent monitoring Command and Response adopts a total optical power top modulation scheme, namely, a low-frequency signal is modulated into a service transmission path with a certain amplitude (modulation depth), and after long-distance transmission, a receiving end demodulates information carried by an original signal. The design of the modulation depth has great significance, the signal to noise ratio is deteriorated if the modulation depth is large, and the demodulation error rate is increased if the modulation depth is small. In the prior art, the modulation depth is configured in advance through a circuit at the initial design stage, and the product level cannot be changed. Before each product is shipped, a draft is made in a long fiber environment according to the laying distance of the submarine cable in the project and the design specification of an optical path, and the modulation depth is determined to meet the requirement of a submarine cable system. Because the submarine cable system has the characteristic of customization, different submarine cable projects often have differences in optical specifications, and the submarine cable system is different in length, and the requirements of different submarine cable systems on modulation depth cannot be met by applying the same circuit configuration. Therefore, the circuit parameter configuration needs to be matched one-to-one for different submarine cable systems, and the universality is not high. In addition, when the product is in use, once a Response demodulation problem occurs, the feedback function cannot be repaired.
Disclosure of Invention
Because the submarine cable system has the characteristic of customization, different submarine cable projects often have differences in optical specifications, and the submarine cable system is different in length, and the requirements of different submarine cable systems on modulation depth cannot be met by applying the same circuit configuration. Therefore, the circuit parameter configuration needs to be matched one-to-one for different submarine cable systems, and the universality is not high. In addition, in the using process of the product, once the problem of Response demodulation occurs, the feedback function cannot be repaired, and aiming at the technical problems, the application provides an intelligent feedback system with the configurable modulation depth.
An intelligent feedback system with configurable modulation depth comprises: the device comprises a receiving demodulation unit, a core control unit, a multi-path pumping unit and an amplifier;
the demodulation unit is connected with a command sending end of the end station equipment and is configured to receive the instruction signal and preprocess the instruction signal to obtain a preprocessed instruction signal;
the core control unit is connected with the demodulation unit and is configured to receive the preprocessed instruction signal sent by the demodulation unit, analyze the preprocessed instruction signal to obtain modulation depth and generate a feedback instruction according to the modulation depth information;
the electrical signal input ends of the multiple pumping units are connected with the core control unit, the optical signal output ends of the multiple pumping units are connected with the amplifier, and the feedback instructions are transmitted back to the end station equipment through the amplifier.
In one implementation, the pump unit includes a pump driver, an electrical signal input, and a pump laser;
the pump driver is connected and drives the pump laser in a parallel shunting mode, and the electric signal input end loads a control signal to the pump laser through a triode.
In one implementation, the multiple pumping units all use independent power supplies.
Therefore, by adopting a redundancy backup strategy for the fiber feeding pumping laser input by the amplifier, the core control unit performs combined configuration on whether each path of pumping unit participates in the transmission of the feedback instruction, and the realization of the whole feedback function cannot be influenced even if one path of pumping unit fails in feedback.
In one implementation, the modulation frequencies of the multiple pumping units are the same.
In one implementation, the initial modulation depths of the multiple pumping units are different or the same.
In one implementation, the number of pump cells is 4, and the modulation depth is 1%, 2%, 4%, and 6%, respectively.
In one implementation, the modulation depth of the intelligent feedback system is T = K1T1+K2T2+K3T3+…+KnTnWherein, K is1To KnIs 0 or 1, T1To TnThe modulation depths of the n pump units are respectively.
An intelligent feedback method with configurable modulation depth comprises the following steps: receiving an instruction signal through a demodulation unit, and preprocessing the instruction signal to obtain a preprocessed instruction signal;
sending the preprocessed instruction signal to a core control unit through a demodulation unit, analyzing the preprocessed instruction signal by the core control unit to obtain a modulation depth, and generating a feedback instruction according to the modulation depth;
the core control unit configures a multi-channel pumping unit according to the modulation depth in the feedback instruction, and sends the feedback instruction to the configured multi-channel pumping unit;
the multi-path pumping unit loads the feedback instructions into the optical signal and transmits the feedback instructions back to the end station equipment through the amplifier.
According to the above technical solution, the present application provides an intelligent feedback system with configurable modulation depth, the intelligent feedback system includes: the device comprises a receiving demodulation unit, a core control unit, a multi-path pumping unit and an amplifier; the demodulation unit is connected with a command sending end of the end station equipment and is configured to receive an instruction signal and preprocess the instruction signal to obtain a preprocessed instruction signal; the core control unit is connected with the demodulation unit and is configured to receive the preprocessed instruction signal sent by the demodulation unit, analyze the preprocessed instruction signal to obtain modulation depth, and generate a feedback instruction according to the modulation depth information; the electrical signal input ends of the multiple pumping units are connected with the core control unit, the optical signal output ends of the multiple pumping units are connected with the amplifier, and the feedback instructions are transmitted back to the end station equipment through the amplifier.
In the practical application process, the feedback function is added on the first aspect of the embodiment of the application, the 'black box' state of the submarine cable underwater product is changed, the land end station can obtain the working state of the underwater equipment through real-time query, and the optical path state and the circuit state of the submarine cable system can be monitored intelligently; in a second aspect, in the embodiment of the application, in the field of submarine cables, the online configurable modulation depth function is added to a Command & Response scheme for the first time, so that a submarine cable system is more intelligent, and for the design specifications of different projects, the initial modulation depth design of equipment with an intelligent feedback function can be specifically configured in a software manner without hardware maintenance, thereby providing convenience for small-batch processing. When the feedback is invalid, the feedback function can be recovered by switching the feedback combination scheme through the operation of the upper end station on the premise of not needing offshore construction to salvage underwater equipment for maintenance, and the labor, material resources and time cost are saved.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an intelligent monitoring network for submarine cable underwater equipment;
fig. 2 is a schematic diagram of product intelligent feedback verification networking of an optical demultiplexer according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an intelligent feedback system with configurable modulation depth according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a parallel shunt driving circuit adopted by a pumping unit according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of embodiments consistent with certain aspects of the application, as detailed in the claims.
It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.
The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to all elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.
Because the submarine cable system has the characteristic of customization, different submarine cable projects often have differences in optical specifications, and the submarine cable system is different in length, and the requirements of different submarine cable systems on modulation depth cannot be met by applying the same circuit configuration. Therefore, the circuit parameter configuration needs to be matched one-to-one for different submarine cable systems, and the universality is not high. In addition, in the using process of the product, once a Response demodulation problem occurs, the feedback function cannot be repaired, and in order to solve the above technical problem, an embodiment of the present application provides an intelligent feedback system with a configurable modulation depth, referring to fig. 3, for a structural schematic diagram of the intelligent feedback system with a configurable modulation depth provided by the embodiment of the present application, the intelligent feedback system with a configurable modulation depth includes: the device comprises a receiving demodulation unit, a core control unit, a multi-path pumping unit and an amplifier.
The demodulation unit is connected with a command sending end of the end station equipment through a submarine cable transmission system, is configured to receive an instruction signal sent by the end station equipment, and carries out preprocessing demodulation on the instruction signal through a demodulation circuit to obtain a preprocessed instruction signal.
The core control unit is connected with the demodulation unit, configured to receive the preprocessed command signal sent by the demodulation unit, analyze the preprocessed command signal by the core control unit to obtain a modulation depth and a specific control command, and perform specific execution of the control command by the core control unit, after the control command is executed, the execution result needs to be fed back to onshore end station equipment, at this time, the core control unit generates a feedback command according to the execution result and the modulation depth information, and controls the multi-path pumping unit to transmit the feedback command to the submarine cable transmission system.
The electrical signal input ends of the multiple pumping units are connected with the core control unit, the optical signal output ends of the multiple pumping units are connected with the amplifier, and the amplifier sends the feedback instruction to the submarine cable transmission system and transmits the feedback instruction to the end station equipment through the submarine cable transmission system.
Specifically, as shown in fig. 4, the pumping unit includes a pumping driver, an electrical signal input terminal, and a pumping laser; the pump driver is connected and drives the pump laser in a parallel shunting mode, and the electric signal input end loads a control signal to the pump laser through a triode. The pump driver is used for providing a driving current, the driving current is divided into a part of the driving current to one stage of the triode, the other stage of the triode receives a feedback instruction (Response control signal), and then the feedback instruction is converted into an optical signal through the pump laser, and the optical signal is transmitted to the amplifier.
As shown in fig. 4, in the intelligent feedback system provided in the embodiment of the present application, the pump laser is driven in a parallel shunt manner, the Response control uses a low-frequency modulation signal, and the modulation depth is determined by a shunt ratio of the pump driver and an amplifier specification, where the modulation frequencies of the multiple pumping units are the same, and the initial modulation depths of the multiple pumping units may be set to be the same or different according to the setting design requirements. In order to verify the practical application of the intelligent feedback system, the embodiment of the application adopts the networking shown in fig. 2 for testing, and the product intelligent feedback of the optical branching multiplexer is verified to obtain: the optical signal to noise ratio is reduced to a certain extent by increasing the modulation function, so that the modulation frequency and the modulation depth are not too large; in a submarine cable system, the modulation depth has the transmission attenuation characteristic, and the lower limit of the demodulation capacity of a receiving end is ensured not to be exceeded after long-distance transmission; for a certain system (specific amplifier specification), the higher the modulation frequency, the greater the modulation depth remaining after long distance transmission.
In contrast, in the embodiment of the present application, a redundancy backup strategy is adopted for the fiber feeding pumping laser input by the amplifier, the multiple pumping units all adopt independent power supplies, and the core control unit performs combined configuration on whether each pumping unit participates in transmission of the feedback instruction, so that the realization of the overall feedback function is not affected even if one pumping unit fails in feedback.
On the basis of total optical power tuning, each pump unit of the amplifier input fiber is configured with a specific modulation depth and can independently participate in feedback. The total modulation depth is online configurable through a multi-path pumping unit combination mode, assuming that n pumping units are in total, the feedback modulation depth generated independently is T1-Tn, and the configurable range is as follows: min { T1, T2, …, Tn } - [ Sum { T1, T2, …, Tn }, that is, the modulation depth of the intelligent feedback system is T = K1T1+ K2T2+ K3T3+ … + KnTn, where K1 to Kn are 0 or 1, and T1 to Tn are the modulation depths of the n-way pumping units, respectively, for example, the number of the pumping units is 4, and the modulation depths are 1%, 2%, 4%, and 6%, respectively, the modulation depths can be 1% to 13% by combination.
Corresponding to the foregoing embodiments of the intelligent feedback system, the present application also provides embodiments of an intelligent feedback method. The intelligent feedback method is applied to the intelligent feedback system.
The intelligent feedback method comprises the following steps:
receiving an instruction signal through a demodulation unit, and preprocessing the instruction signal to obtain a preprocessed instruction signal;
sending the preprocessed instruction signal to a core control unit through a demodulation unit, analyzing the preprocessed instruction signal by the core control unit to obtain a modulation depth, and generating a feedback instruction according to the modulation depth;
the core control unit configures a multi-channel pumping unit according to the modulation depth in the feedback instruction, and sends the feedback instruction to the configured multi-channel pumping unit;
the multi-path pumping unit loads the feedback instructions into the optical signal and transmits the feedback instructions back to the end station equipment through the amplifier.
According to the above technical solution, an embodiment of the present application provides an intelligent feedback system with configurable modulation depth, where the intelligent feedback system includes: the device comprises a receiving demodulation unit, a core control unit, a multi-path pumping unit and an amplifier; the demodulation unit is connected with a command sending end of the end station equipment and is configured to receive an instruction signal and preprocess the instruction signal to obtain a preprocessed instruction signal; the core control unit is connected with the demodulation unit and is configured to receive the preprocessed instruction signal sent by the demodulation unit, analyze the preprocessed instruction signal to obtain modulation depth, and generate a feedback instruction according to the modulation depth information; the electrical signal input ends of the multiple pumping units are connected with the core control unit, the optical signal output ends of the multiple pumping units are connected with the amplifier, and the feedback instructions are transmitted back to the end station equipment through the amplifier.
In the practical application process, the feedback function is added on the first aspect of the embodiment of the application, the 'black box' state of the submarine cable underwater product is changed, the land end station can obtain the working state of the underwater equipment through real-time query, and the optical path state and the circuit state of the submarine cable system can be monitored intelligently; in a second aspect, in the embodiment of the application, in the field of submarine cables, the online configurable modulation depth function is added to a Command & Response scheme for the first time, so that a submarine cable system is more intelligent, and for the design specifications of different projects, the initial modulation depth design of equipment with an intelligent feedback function can be specifically configured in a software manner without hardware maintenance, thereby providing convenience for small-batch processing. When the feedback is invalid, the feedback function can be recovered by switching the feedback combination scheme through the operation of the upper end station on the premise of not needing offshore construction to salvage underwater equipment for maintenance, and the labor, material resources and time cost are saved.
The above embodiments are provided to explain the purpose, technical solutions and advantages of the present application in further detail, and it should be understood that the above embodiments are merely illustrative of the present application and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.
Claims (8)
1. An intelligent feedback system with configurable modulation depth, comprising: the device comprises a receiving demodulation unit, a core control unit, a multi-path pumping unit and an amplifier;
the demodulation unit is connected with a command sending end of the end station equipment and is configured to receive the instruction signal and preprocess the instruction signal to obtain a preprocessed instruction signal;
the core control unit is connected with the demodulation unit and is configured to receive the preprocessed instruction signal sent by the demodulation unit, analyze the preprocessed instruction signal to obtain modulation depth and generate a feedback instruction according to the modulation depth information;
the electrical signal input ends of the multiple pumping units are connected with the core control unit, the optical signal output ends of the multiple pumping units are connected with the amplifier, and the feedback instructions are transmitted back to the end station equipment through the amplifier.
2. The intelligent feedback system with configurable modulation depth of claim 1, wherein the pump unit comprises a pump driver, an electrical signal input terminal and a pump laser;
the pump driver is connected and drives the pump laser in a parallel shunting mode, and the electric signal input end loads a control signal to the pump laser through a triode.
3. The intelligent feedback system of claim 2, wherein each of the multiple pumping units employs an independent power supply.
4. The intelligent feedback system with configurable modulation depth as claimed in claim 1, wherein the modulation frequencies of the multiple pumping units are the same.
5. The intelligent feedback system with configurable modulation depth as claimed in claim 1, wherein the initial modulation depths of the multiple pumping units are different or the same.
6. The system of claim 1, wherein the number of the pumping units is 4, and the modulation depth is 1%, 2%, 4% and 6%.
7. The system of claim 1, wherein the modulation depth of the system is T = K1T1+K2T2+K3T3+…+KnTnWherein, K is1To KnIs 0 or 1, T1To TnThe modulation depths of the n pump units are respectively.
8. An intelligent feedback method with adjustable modulation depth, wherein the intelligent feedback method with adjustable modulation depth is applied to an intelligent feedback system with adjustable modulation depth of claims 1-7, and comprises:
receiving an instruction signal through a demodulation unit, and preprocessing the instruction signal to obtain a preprocessed instruction signal;
sending the preprocessed instruction signal to a core control unit through a demodulation unit, analyzing the preprocessed instruction signal by the core control unit to obtain a modulation depth, and generating a feedback instruction according to the modulation depth;
the core control unit configures a multi-channel pumping unit according to the modulation depth in the feedback instruction, and sends the feedback instruction to the configured multi-channel pumping unit;
the multi-path pumping unit loads the feedback instructions into the optical signal and transmits the feedback instructions back to the end station equipment through the amplifier.
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