Three-party co-driven chaotic module link system synchronization method and system

Abstract

The invention relates to information technology. The invention aims to solve the problem that synchronization cannot be realized due to the fact that the correlation between a chaotic encrypted signal and a chaotic decrypted signal cannot be measured in real time when a three-party co-drive technology is adopted at present, and provides a three-party co-drive chaotic module link system synchronization method and a three-party co-drive chaotic module link system synchronization system. The technical scheme can be summarized as follows: before a three-party co-driven chaos module link system is used, a continuous laser is input into an encryption end as a service carrier, and a chaos encryption signal is modulated into the service carrier through an intensity modulator to obtain service light; transmitting the service light and the chaotic driving signal to a decryption end in a wavelength division multiplexing mode; and the decryption end obtains the service light and the chaos decryption signal, and adjusts device parameters of the decryption end through convex optimization of correlation operation of the service light and the chaos decryption signal for synchronization. The method has the advantages that synchronization can be completed without adding optical fibers, and the method is suitable for a chaos module link system.

Description

Technical Field

[0001] The present application relates to information technology, and in particular to a method and system for synchronizing a chaotic module link system driven by three parties. Background Art

[0002] In a chaotic module link system, it generally includes a service carrier input end, an encryption end and a decryption end. The service carrier input end is connected to an input end of a phase modulator of the encryption end. The phase modulator performs chaotic phase scrambling on the input service carrier (i.e., the chaotically encrypted service signal) and transmits it to the decryption end through a service link for descrambling. The decryption end performs descrambling through a chaotic decryption device. The two input ends of the chaotic decryption device require the chaotic decryption signal generated by the decryption end and the chaotically encrypted service signal sent by the encryption end, respectively. Therefore, when it is used, the delay of the chaotic phase scrambling and descrambling operations applied to the service carrier needs to be strictly controlled so that when the chaotically scrambled service carrier is transmitted to the chaotic decryption device, the synchronized chaotic decryption signal is also transmitted to the chaotic decryption device. The transmission delays of the two need to be precisely aligned, and the delay error should be less than ~10ps. Therefore, it is necessary to synchronize the encryption and decryption signals in the chaotic module link system. To synchronize them, it is necessary to obtain the correlation between the chaotic encryption signal and the chaotic decryption signal.

[0003] However, when the chaotic module link system is deployed in an actual remote location, it is impossible to measure the correlation between the chaotic encryption signal and the decryption signal in real time. This is because when the three-party co-driving technology is used, a master laser will drive the first slave laser of the encryption end (encryption link) to generate the encryption end chaotic optical signal C A , and drives the second slave laser of the decryption end (decryption link) to generate the chaotic optical signal C of the decryption end B By controlling the hardware state parameters, the chaotic optical signal C at the encryption end is A and the chaotic optical signal C at the decryption end B They are two highly correlated signals, thus achieving the functions of encryption at the encryption end and matching decryption at the decryption end. However, the three-party co-drive technology requires that the wavelength detuning of the master laser and the two slave lasers (the first slave laser and the second slave laser) cannot exceed ~0.1nm, and there is an effect of master-slave injection locking that brings the central wavelength of the slave laser closer to the central wavelength of the master laser (that is, the wavelength difference between the two is further reduced). Therefore, the wavelength interval between the master and slave lasers is much smaller than the interval of conventional wavelength division multiplexing / demultiplexing devices (~0.4nm), making it impossible for the chaotic driving signal and the chaotic encryption signal to be simultaneously transmitted to the decryption end through wavelength division multiplexing. Among them, the chaotic driving signal must be transmitted to the decryption end to generate a chaotic decryption signal. Therefore, the chaotic encryption signal cannot be transmitted to the decryption end when there is only one optical fiber that uses wavelength division multiplexing to transmit the service light and the chaotic driving signal.

[0004] Therefore, when the three-party co-driving technology is used in the prior art, the correlation between the chaotic encryption signal and the decryption signal cannot be measured in real time, resulting in a failure to synchronize. Summary of the invention

[0005] The purpose of this application is to solve the problem that when the three-party co-driving technology is currently used, the correlation between the chaotic encryption signal and the decryption signal cannot be measured in real time, resulting in the inability to synchronize. A method and system for synchronizing a chaotic module link system with three-party co-driving is provided.

[0006] In the technical solution adopted by the present application to solve the above technical problems, a first aspect provides a three-party co-driven chaotic module link system synchronization method, comprising the following steps:

[0007] Before using the three-party co-driven chaotic module link system, a continuous laser is input to the encryption end as a service carrier, and the chaotic encryption signal is modulated into the service carrier through an intensity modulator to obtain service light;

[0008] The service light and the chaotic driving signal are transmitted to the decryption end by wavelength division multiplexing;

[0009] The decryption end obtains the service light and the chaotic decryption signal, and adjusts the parameters of the decryption end device for synchronization through the convex optimization of the correlation operation between the service light and the chaotic decryption signal.

[0010] Specifically, the business light and the chaotic driving signal are transmitted to the decryption end in a wavelength division multiplexing manner, including:

[0011] The service light adopts a first transmission band, and the chaotic driving signal adopts a second transmission band, and the first transmission band is different from the second transmission band.

[0012] Furthermore, the continuous laser meets the channel requirement of the first transmission band.

[0013] Specifically, the first transmission band is the C34 band, and the second transmission band is the C32 band.

[0014] In the technical solution adopted by the present application to solve the above technical problems, the second aspect provides a three-party co-driven chaotic module link system synchronization system, including a chaotic decryption signal input terminal, a business light input terminal, a sampling and analysis module, an intensity modulator and a continuous laser generation module;

[0015] The continuous laser generating module is used to input continuous laser as a service carrier to the encryption end of the chaotic module link system of the three parties to be synchronized;

[0016] The intensity modulator is used to replace the encryption end phase modulator in the three-party co-driven chaotic module link system to be synchronized when synchronization is required, and modulate the chaotic encryption signal into the input service carrier;

[0017] The chaotic decryption signal input terminal is used to obtain the chaotic decryption signal generated by the decryption terminal in the chaotic module link system of the three parties to be synchronized, and transmit it to the sampling and analysis module;

[0018] The service light input end is used to obtain the electrical signal corresponding to the service light received by the decryption end in the chaotic module link system of the three parties to be synchronized, and transmit it to the sampling and analysis module;

[0019] The sampling and analysis module is used to perform correlation operations according to the electrical signal corresponding to the service light and the chaotic decryption signal, and adjust the device parameters of the decryption end according to the convex optimization of the correlation operation to perform synchronization.

[0020] Specifically, the sampling and analysis module includes:

[0021] A high-speed oscilloscope unit is used to perform high-speed sampling on the electrical signal and chaotic decryption signal corresponding to the input business light, and obtain the corresponding digital signal for processing by the digital processing unit;

[0022] The digital processing unit is used to perform correlation operations according to the electrical signal corresponding to the business light and the chaotic decryption signal, and adjust the device parameters of the decryption end according to the convex optimization of the correlation operation to perform synchronization.

[0023] The beneficial effect of the present application is that, in the scheme of the present application, during synchronization, the chaotic encryption signal is modulated into the service carrier through an intensity modulator to obtain service light (the service light does not contain service information), and then the service light and the chaotic driving signal are transmitted to the decryption end by wavelength division multiplexing. Finally, the decryption end adjusts the decryption end device parameters by convex optimization of the correlation operation between the service light and the chaotic decryption signal to perform synchronization, thereby avoiding the problem that the chaotic encryption signal cannot be transmitted using the same optical fiber as the chaotic driving signal by wavelength division multiplexing. Moreover, during synchronization calculation, the service light and the chaotic decryption signal are directly used for correlation operation, and there is no need to parse the chaotic encryption signal. The synchronization is convenient and fast, and there is no need to increase the transmission optical fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic flow chart of a three-party co-driven chaotic module link system synchronization method provided in the first aspect of the embodiment of the present application;

[0025] Figure 2 It is a schematic system block diagram of a three-party co-driven chaotic module link system synchronization system and a chaotic module link system to be synchronized provided in the second aspect of an embodiment of the present application after being connected;

[0026] Figure 3 is a curve showing the relationship between the modulation voltage and the output optical power of the intensity modulator in the embodiment of the present application;

[0027] Figure 4 When experimenting in the present application example and Schematic diagram of correlation test results;

[0028] Figure 5 It is based on three-party co-drive in the experiment in the embodiment of this application. and Schematic diagram of correlation test results;

[0029] Figure 6 It is based on three-party co-drive in the experiment in the embodiment of this application. and Schematic diagram of the correlation test results. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In the following description, specific details such as specific system structures and technologies are proposed for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, the detailed description of well-known systems, devices, circuits and methods is omitted to prevent unnecessary details from hindering the description of the present application.

[0031] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0032] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0034] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0035] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0036] Figure 1 A schematic flow chart of a three-party co-driven chaotic module link system synchronization method provided in the first aspect of an embodiment of the present application is shown. As an example but not a limitation, the three-party co-driven chaotic module link system synchronization method includes:

[0037] Before using the three-party co-driven chaotic module link system, a continuous laser is input to the encryption end as a service carrier, and the chaotic encryption signal is modulated into the service carrier through an intensity modulator to obtain service light;

[0038] The service light and the chaotic driving signal are transmitted to the decryption end by wavelength division multiplexing;

[0039] The decryption end obtains the service light and the chaotic decryption signal, and adjusts the parameters of the decryption end device for synchronization through the convex optimization of the correlation operation between the service light and the chaotic decryption signal.

[0040] It is understandable that the above method is used before the three-party co-driven chaotic module link system is used, that is, when there is no service signal input, so the service light obtained is only the service carrier carrying the chaotic encryption signal, and does not contain the service signal. After receiving the wavelength division multiplexed service light and chaotic driving signal, the decryption end needs to demultiplex them. This is a function of the decryption end itself, so it is not recorded in the above scheme.

[0041] In some embodiments, the business light and the chaotic driving signal are transmitted to the decryption end by wavelength division multiplexing, which may include:

[0042] The service light adopts a first transmission band, and the chaotic driving signal adopts a second transmission band, and the first transmission band is different from the second transmission band.

[0043] It can be understood that the purpose of the above method is to distinguish the service light from the chaotic driving signal.

[0044] In some embodiments, the continuous laser meets the channel requirements of the first transmission band.

[0045] It is understandable that if the continuous laser meets the signal requirements of the first transmission band, there is no need to adjust the band of the service light and / or service carrier. At the same time, if the band of the service light is adjusted, it may affect the chaotic encryption signal it carries.

[0046] In some embodiments, to illustrate the first transmission band and the second transmission band, the first transmission band may be a C34 band, and the second transmission band may be a C32 band.

[0047] Figure 2 A schematic system block diagram of a three-party co-driven chaotic module link system synchronization system provided in the second aspect of an embodiment of the present application after being connected to a chaotic module link system to be synchronized is shown. As an example but not a limitation, the three-party co-driven chaotic module link system synchronization system includes:

[0048] Chaotic decryption signal input terminal, business light input terminal, sampling and analysis module, intensity modulator and continuous laser generation module;

[0049] A continuous laser generating module is used to input continuous laser as a service carrier to the encryption end of the chaotic module link system that needs to be synchronized by three parties;

[0050] The intensity modulator is used to replace the encryption end phase modulator in the chaotic module link system driven by three parties to be synchronized when synchronization is required, and modulate the chaotic encryption signal into the input service carrier;

[0051] The chaotic decryption signal input terminal is used to obtain the chaotic decryption signal generated by the decryption terminal in the chaotic module link system of the three parties to be synchronized, and transmit it to the sampling and analysis module;

[0052] The service optical input end is used to obtain the electrical signal corresponding to the service optical received by the decryption end in the chaotic module link system of the three parties to be synchronized, and transmit it to the sampling and analysis module;

[0053] The sampling and analysis module is used to perform correlation operations based on the electrical signal corresponding to the business light and the chaotic decryption signal, and adjust the device parameters of the decryption end according to the convex optimization of the correlation operation to perform synchronization.

[0054] It can be understood that the above-mentioned three-party co-driven chaotic module link system synchronization system is a system established corresponding to the above-mentioned three-party co-driven chaotic module link system synchronization method. Since the service carrier does not need to be phase modulated but intensity modulated, an intensity modulator is used to replace the original phase modulator in the encryption end. After the synchronization is completed, the intensity modulator needs to be replaced back to the original phase modulator. Here, the intensity modulator can be a Mach-Zehnder intensity modulator. And since the direct service light and the chaotic driving signal are directly transmitted to the decryption end through wavelength division multiplexing at the encryption end, that is, there is no need to change the corresponding three-party co-driven chaotic module link system (except the phase modulator at the encryption end), it does not belong to the above-mentioned three-party co-driven chaotic module link system synchronization system.

[0055] In addition, since the optical signal itself cannot be directly read by a processor or other device, the decryption end itself has a corresponding module for converting it into an electrical signal, which will not be described in detail here.

[0056] In some embodiments, the sampling and analysis module may include:

[0057] A high-speed oscilloscope unit is used to perform high-speed sampling on the electrical signal and chaotic decryption signal corresponding to the input business light, and obtain the corresponding digital signal for processing by the digital processing unit;

[0058] The digital processing unit is used to perform correlation operations according to the electrical signal corresponding to the business light and the chaotic decryption signal, and adjust the device parameters of the decryption end according to the convex optimization of the correlation operation to perform synchronization.

[0059] It is understandable that, since the digital processing unit cannot directly process analog electrical signals, a high-speed oscilloscope unit is required to sample and convert the analog electrical signals into digital signals.

[0060] Since in the prior art, the correlation between the chaotic encryption signal and the chaotic decryption signal is required for synchronization, and in the embodiment of the present application, the correlation between the service light carrying the chaotic encryption signal and the chaotic decryption signal is used for synchronization, the principle of the technical solution in the embodiment of the present application is derived as follows:

[0061] Assume that the chaotic driving signal C D The co-drive generates a chaotic encrypted signal C with a high synchronization coefficient. A and the chaotic decryption signal C B The synchronization coefficient between the two is defined as follows:

[0062]

[0063] in and They respectively represent the time domain electrical signals of the chaotic encryption signal and the chaotic decryption signal after being detected by the photoelectric detector (available at both the encryption and decryption ends). The superscript wavy line indicates that the DC component of the electrical signal is filtered out. xcorr{a,b} represents the normalized cross-correlation operation of a and b. max{a} represents the maximum value of a (time domain signal).

[0064] For a Mach-Zehnder intensity modulator (MZM), the output optical power and the applied voltage satisfy the cosine relationship:

[0065]

[0066] Where Φ(t)=aU(t)

[0067] represents the phase shift caused by the applied voltage U(t), a is the conversion coefficient from voltage to phase shift, φ DC is a fixed phase shift controlled by a DC bias.

[0068] Assume that φ DC Control to -π / 2, then the formula will become

[0069]

[0070] See also Figure 1 The relationship between the modulation voltage and the output optical power of the MZM. The fixed phase shift φ controlled by the DC bias DC is -π / 2.

[0071] According to the value of the MZM conversion coefficient a, when the range of U(t) is controlled so that aU(t) is between [-π / 2,π / 2], the output optical power P of the MZM is out In [0,P in ] range, and is monotonically increasing with U(t). In particular, when aU(t) approaches 0, U(t) and P out There is a linear relationship.

[0072] Will As MZM(φ DC The RF input is controlled to -π / 2) and the continuous laser (CW) with stable power is used as the carrier input. Then the output optical power is

[0073]

[0074] Where b represents the conversion coefficient between optical power and optical field modulus.

[0075] After detection by a high-speed photodetector, the DC-isolated time-domain electrical signal is obtained:

[0076]

[0077] because and Has a very high correlation (usually greater than 92%). According to the above formula, when When it is between [-π / 2,π / 2], due to and The high correlation and There will also be a high correlation between them.

[0078] This is the theoretical basis of the technical solution of this application. The following experiment is conducted to verify whether the theoretical basis is correct.

[0079] It has been verified by experiments. and The correlation between and The correlation coefficient between and The synchronization coefficient is CC AB =0.9183±0.0084, corresponding and and the correlation coefficient is CC SB =0.9131±0.0045, CCSB can replace CCAB as a parameter to judge the synchronization performance of chaotic encryption and decryption signals. In addition, the case of S(t) transmitted through 20-km single-mode fiber was tested. When the back-to-back (B2B) test and The correlation coefficient is CC B2B =0.9507±0.005, in the case of 20-km single-mode fiber transmission, the correlation coefficient is CC 20km =0.9556±0.013. The results show that after transmission through a 20-km single-mode optical fiber, the expected value of the correlation between the two has basically not changed, but the fluctuation range has increased by 2 to 3 times (the fluctuation range has no effect on the final calculation result, and the average value is ultimately used as the judgment standard. The large fluctuation range is because after long-distance optical fiber transmission, the random change of the polarization state increases, resulting in larger fluctuations in the synchronization coefficient, which can be averaged through multiple measurements.).

[0080] and Correlation test:

[0081] First, test and The experimental test framework is as follows: the chaotic optical signal C generated by the first slave laser after being injected and locked by the master laser A, which is detected by a differential photodetector, and the positive phase output signal The RF input to the intensity modulator inverts the output signal A continuous laser source emits a stable laser, which is detected by another photodetector after being modulated by the intensity modulator. And input to the carrier input channel of the oscilloscope.

[0082] The experiment tested the correlation between the service link in the back-to-back (B2B) case and after transmission over a 20-km single-mode fiber (SMF). Figure 4 In the case of B2B, the correlation coefficient between the two is CC B2B =0.9507±0.005, in the case of 20-km single-mode fiber transmission, the correlation coefficient is CC 20km =0.9556±0.013. The results show that after transmission through a 20-km single-mode optical fiber, the expected value of the correlation between the two does not change much, but the fluctuation range increases by 2 to 3 times. Figure 4 The reason why the correlation point diagram in is not a typical rugby ball shape is that the optical power transfer function of the intensity modulator is a sinusoidal function (rather than a perfect linear function).

[0083] Figure 4 and The correlation test results are shown in Figure 1. (a) shows the correlation coefficients of B2B (blue squares) and after 20-km SMF transmission (orange circles). The sub-figures are the correlation curves and corresponding correlation point diagrams of one of the tests. Figure 1 is ... The time domain waveform and its power spectrum. The figure below (c) shows the same test. Time domain waveform and its power spectrum. Note that the signal may have been inverted to make the two signals in phase.

[0084] and Correlation test:

[0085] Then, we tested and The experimental test architecture is as follows: Under the three-party co-drive architecture, the encryption end and the decryption end respectively generate a chaotic encrypted optical signal C with a very high synchronization coefficient. A Decrypting optical signals with chaos C B , where C A After being detected by a differential photodetector at the encryption end, the positive phase output signal The RF input is given to the intensity modulator. At the same time, a continuous laser source emits a stable power laser, which is detected by another photodetector after being electro-optically modulated by the intensity modulator, and the output and input to the oscilloscope. On the other hand, C B A photodetector at the decoded end detects differentially, with the inverted output Direct input to another channel of the oscilloscope.

[0086] Chaotic Encrypted Signal and Chaos Decryption Signal The synchronization coefficient test results are as follows Figure 5 As shown in Figure 2, after 10 tests, the statistical result of the synchronization coefficient between the two is CC AB =0.9183±0.0084. On this basis, the test and and correlation coefficients, such as Figure 6 As shown, the statistical results of 10 tests are CC SB =0.9131±0.0045. The test results show that CC SB and CC AB There is basically no difference, so CC SB Can replace CC AB As a parameter to judge the synchronization performance of chaotic encryption and decryption signals.

[0087] Figure 5 In the figure (a), the correlation coefficient of 10 test records is 0.9183±0.0084, and the sub-figure is the correlation curve and corresponding correlation point diagram of one of them. Figure (b) is the correlation coefficient of 10 test records. The time domain waveform and its power spectrum. The figure below (c) shows the same test. Time domain waveform and its power spectrum. Note that the signals may have been post-processed to invert the phase to bring the two signals into phase.

[0088] Figure 6 In the figure (a), the correlation coefficient of 10 test records is 0.9131±0.0045, and the sub-figure is the correlation curve and corresponding correlation point diagram of one of them. Figure (b) is the correlation coefficient of 10 test records. The time domain waveform and its power spectrum. The figure below (c) shows the same test. Time domain waveform and its power spectrum. Note that the signals may have been post-processed to invert the phase to bring the two signals into phase.

[0089] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0090] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units / modules are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0091] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0092] 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 computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device that can carry the computer program code to the camera device / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a disk or an optical disk. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media does not include electrical carrier signals and telecommunication signals.

[0093] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0094] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0095] In the embodiments provided in the present application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, 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.

[0096] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0097] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

[0098] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A three-party co-driven chaotic module link system synchronization method, characterized in that: The following steps are involved: Before using the three-party co-driven chaotic module link system, a continuous laser is input to the encryption end as a service carrier, and the chaotic encryption signal is modulated into the service carrier through an intensity modulator to obtain service light; The service light and the chaotic driving signal are transmitted to the decryption end by wavelength division multiplexing; The decryption end obtains the service light and the chaotic decryption signal, and adjusts the parameters of the decryption end device for synchronization through the convex optimization of the correlation operation between the service light and the chaotic decryption signal.

2. The method for synchronizing a chaotic module link system driven by three parties as claimed in claim 1, characterized in that: The business light and the chaotic driving signal are transmitted to the decryption end in a wavelength division multiplexing manner, including: The service light adopts a first transmission band, and the chaotic driving signal adopts a second transmission band, and the first transmission band is different from the second transmission band.

3. The method for synchronizing a chaotic module link system driven by three parties as claimed in claim 2, characterized in that: The continuous laser meets the channel requirement of the first transmission band.

4. The method for synchronizing a chaotic module link system driven by three parties as described in any one of claims 2-3, characterized in that: The first transmission band is the C34 band, and the second transmission band is the C32 band.

5. A three-party co-driven chaotic module link system synchronization system, characterized in that: It includes a chaotic decryption signal input terminal, a business light input terminal, a sampling and analysis module, an intensity modulator and a continuous laser generation module; The continuous laser generating module is used to input continuous laser as a service carrier to the encryption end of the chaotic module link system of the three parties to be synchronized; The intensity modulator is used to replace the encryption end phase modulator in the three-party co-driven chaotic module link system to be synchronized when synchronization is required, and modulate the chaotic encryption signal into the input service carrier; The chaotic decryption signal input terminal is used to obtain the chaotic decryption signal generated by the decryption terminal in the chaotic module link system of the three parties to be synchronized, and transmit it to the sampling and analysis module; The service light input end is used to obtain the electrical signal corresponding to the service light received by the decryption end in the chaotic module link system of the three parties to be synchronized, and transmit it to the sampling and analysis module; The sampling and analysis module is used to perform correlation operations according to the electrical signal corresponding to the service light and the chaotic decryption signal, and adjust the device parameters of the decryption end according to the convex optimization of the correlation operation to perform synchronization.

6. The three-party co-driven chaotic module link system synchronization system as claimed in claim 5, characterized in that: The sampling and analysis module comprises: A high-speed oscilloscope unit is used to perform high-speed sampling on the electrical signal and chaotic decryption signal corresponding to the input business light, and obtain the corresponding digital signal for processing by the digital processing unit; The digital processing unit is used to perform correlation operations according to the electrical signal corresponding to the business light and the chaotic decryption signal, and adjust the device parameters of the decryption end according to the convex optimization of the correlation operation to perform synchronization.

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