Optical network-based signal transmission method, device, apparatus, system and medium

Abstract

The application discloses a signal transmission method, device, equipment, system and medium based on an optical network. The signal transmission method applied to a modulation device comprises the following steps: receiving first control information generated by a management device; the first control information at least carries chirp phase information for phase modulation of an optical signal; converting the chirp phase information to obtain first digital information corresponding to the chirp phase information; phase-modulating an initial optical signal to be sent based on the first digital information to obtain an encrypted optical signal; and sending the encrypted optical signal. Different phase modulations can be performed on the initial optical signal based on different first control information, so that the initial optical signal is distorted in the time domain to obtain the encrypted optical signal, the encryption mode of the optical signal is flexibly adjusted, an eavesdropper is difficult to obtain the complete encrypted optical signal, and it is more difficult for the eavesdropper to identify the initial optical signal according to the encrypted optical signal, thereby improving the security of optical signal transmission.

Description

TECHNICAL FIELD

[0001] The present application relates to optical communication technology, in particular to a signal transmission method, device, equipment, system and medium based on an optical network. BACKGROUND

[0002] In related technologies, encryption is mainly based on protocol layers or application layers above the physical layer, and data security is improved through encryption algorithms. In the face of new risks such as eavesdropping and concatenation of fiber communication systems, the industry focus is on researching endogenous security optical transmission protection technology, including safe modulation and demodulation based on system inherent noise, new mechanisms and methods for safe signal processing. However, the protocol layer or application layer encryption scheme still cannot resist line or node eavesdropping attacks, and faces the risk of information being "hijacked". Information security depends on the difficulty of cracking the encryption algorithm by the eavesdropper, and the eavesdropper will directly intercept all data for cracking, which is increasingly difficult to meet the high security requirements of specific industry users. SUMMARY

[0003] Therefore, the embodiments of the present application provide a signal transmission method, device, equipment, system and medium based on an optical network, aiming to make the encryption mode of optical signals flexible and adjustable, and improve the security of optical signal transmission.

[0004] The technical scheme of the embodiments of the present application is as follows:

[0005] In a first aspect, the embodiments of the present application provide a signal transmission method based on an optical network, applied to a modulation device, the method comprising:

[0006] receiving first control information generated by a management device; the first control information at least carrying chirp phase information for phase modulation of an optical signal;

[0007] converting the chirp phase information to obtain first digital information corresponding to the chirp phase information;

[0008] phase modulating an initial optical signal to be sent based on the first digital information to obtain an encrypted optical signal;

[0009] sending the encrypted optical signal.

[0010] In the above scheme, the phase modulation of the initial optical signal to be sent based on the first digital information to obtain the encrypted optical signal comprises:

[0011] analog conversion of the first digital information to obtain a driving signal corresponding to the initial optical signal;

[0012] phase modulating the initial optical signal based on the driving signal to obtain the encrypted optical signal.

[0013] In the above scheme, the first control information further carries modulation time information for phase modulation of the optical signal, and before the phase modulation of the initial optical signal based on the first digital information to obtain the encrypted optical signal, the method further comprises:

[0014] Converting the modulation time information to obtain second digital information corresponding to the modulation time information;

[0015] Determining a starting time for phase modulation of the initial optical signal based on the second digital information.

[0016] In the above scheme, the drive signal includes a chirp phase signal of first period information, and the chirp phase signal corresponds to the chirp phase information; and the phase modulation of the initial optical signal based on the drive signal to obtain the encrypted optical signal comprises:

[0017] Phase modulating the initial optical signal based on the chirp phase signal of the first period information to obtain the encrypted optical signal.

[0018] In a second aspect, the embodiments of the present application provide a signal transmission method based on an optical network, applied to a demodulation device, and the method comprises:

[0019] Receiving second control information generated by a management device and an encrypted optical signal sent by a modulation device; the second control information at least carries chirp phase information for phase compensation of the encrypted optical signal;

[0020] Phase compensating the encrypted optical signal based on the chirp phase information to obtain an initial optical signal.

[0021] In the above scheme, the phase compensation of the encrypted optical signal based on the chirp phase information to obtain the initial optical signal comprises:

[0022] Determining first period information of the chirp phase information;

[0023] Phase shifting the encrypted optical signal based on the chirp phase information until a second period information of the encrypted optical signal after phase shifting is consistent with the first period information, and determining a demodulation time of the encrypted optical signal;

[0024] Phase compensating the encrypted optical signal based on the demodulation time and the chirp phase information to obtain the initial optical signal.

[0025] In a third aspect, the embodiments of the present application provide a signal transmission device based on an optical network, applied to a modulation device, and the signal transmission device comprises:

[0026] The first receiving unit is configured to receive first control information generated by a management device, wherein the first control information carries at least chirp phase information used for phase modulation of an optical signal.

[0027] The first converting unit is configured to convert the chirp phase information to obtain first digital information corresponding to the chirp phase information.

[0028] The modulating unit is configured to perform phase modulation on an initial optical signal to be transmitted based on the first digital information, to obtain an encrypted optical signal.

[0029] The sending module is configured to send the encrypted optical signal.

[0030] In a fourth aspect, an embodiment of the present application provides a signal transmission device based on an optical network, which is applied to a demodulating device, and the signal transmission device comprises:

[0031] The second receiving unit is configured to receive second control information generated by a management device and an encrypted optical signal sent by a modulating device, wherein the second control information carries at least chirp phase information used for phase compensation of the encrypted optical signal.

[0032] The compensating unit is configured to perform phase compensation on the encrypted optical signal based on the chirp phase information, to obtain an initial optical signal.

[0033] In a fifth aspect, an embodiment of the present application provides a modulating device, which comprises a first processor and a first memory for storing a computer program capable of running on the first processor, wherein,

[0034] The first processor is configured to execute steps of the method in the first aspect of the present application when the computer program runs.

[0035] In a sixth aspect, an embodiment of the present application provides a demodulating device, which comprises a second processor and a second memory for storing a computer program capable of running on the second processor, wherein,

[0036] The second processor is configured to execute steps of the method in the second aspect of the present application when the computer program runs.

[0037] In a seventh aspect, an embodiment of the present application provides a signal transmission system based on an optical network, which comprises a management device, the modulating device and the demodulating device, wherein the management device is configured to send first control information to the modulating device and send second control information to the demodulating device, the first control information carries at least chirp phase information used for phase modulation of an optical signal, and the second control information carries at least chirp phase information used for phase compensation of an encrypted optical signal.

[0038] In an eighth aspect, a computer storage medium is provided, and the computer storage medium stores a computer program. When the computer program is executed by a processor, the steps of the method in the first aspect of the embodiments of the present application are implemented, or the steps of the method in the second aspect of the embodiments of the present application are implemented.

[0039] The embodiments of the present application provide a signal transmission method, device, equipment, system and medium based on an optical network. The method is applied to a modulation device, and the method comprises the following steps: receiving first control information generated by a management device; the first control information at least carries chirp phase information used for phase modulation of an optical signal; converting the chirp phase information to obtain first digital information corresponding to the chirp phase information; performing phase modulation on an initial optical signal to be sent based on the first digital information to obtain an encrypted optical signal; and sending the encrypted optical signal. According to the technical solution of the embodiments of the present application, different phase modulations can be performed on the initial optical signal based on different first control information, so that the initial optical signal is distorted in the time domain to obtain the encrypted optical signal, the encryption mode of the optical signal is flexibly adjusted, it is difficult for an eavesdropper to obtain the complete encrypted optical signal, and it is more difficult for the eavesdropper to identify the initial optical signal from the encrypted optical signal, thereby improving the security of optical signal transmission. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 A flowchart of a modulation device side signal transmission method based on an optical network is provided for the embodiments of the present application;

[0041] Figure 2 A flowchart of a demodulation device side signal transmission method based on an optical network is provided for the embodiments of the present application;

[0042] Figure 3 A working principle diagram of an optical network endogenous security system is provided for the embodiments of the present application;

[0043] Figure 4 A diagram of different phase loading rules of an optical network endogenous security system is provided for the embodiments of the present application;

[0044] Figure 5 A structural diagram of a modulation device side signal transmission device based on an optical network is provided for the embodiments of the present application;

[0045] Figure 6 A structural diagram of a demodulation device side signal transmission device based on an optical network is provided for the embodiments of the present application;

[0046] Figure 7 A structural diagram of a modulation device is provided for the embodiments of the present application;

[0047] Figure 8 A structural diagram of a demodulation device is provided for the embodiments of the present application;

[0048] Figure 9 Figure 1 is a structural schematic diagram of an optical network security system according to an embodiment of the present application. DETAILED DESCRIPTION

[0049] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0051] Optical networks are the arteries and key infrastructure for transmitting information, carrying more than 98% of information in the network. With the rapid development of network size and business, and the significant enhancement of optical network openness, the importance of optical network security is increasingly prominent. Existing optical communication cannot resist line or node eavesdropping attacks, and faces the risk of information being hijacked by tapping and being hijacked by concatenation. If a 1% optical signal is stolen by an eavesdropper, the data information can be recovered at 100%, thus posing a serious threat to the security of high-speed interconnection of key information infrastructure. In the face of increasing attack threats, the security problem of optical networks has become a new challenge.

[0052] In the related art, encryption is mainly based on protocol layers or application layers above the physical layer, and encryption algorithms are used to improve data security. In the face of new risks such as eavesdropping and concatenation in fiber communication systems, the industry focus is on researching endogenous security optical transmission protection technology, including secure modulation and demodulation based on system inherent noise, new mechanisms and methods of secure signal processing, improving information interception resistance, solving physical layer network security blind spots of communication systems, providing physical protection for high-reliability transmission, and realizing endogenous security of optical communication networks based on physical layer secure signal processing. However, in this technical solution, information security depends on the difficulty of cracking the encryption algorithm by the eavesdropper, and no security measures are taken at the physical layer, so the eavesdropper will directly intercept the data for cracking, which is increasingly difficult to meet the high security requirements of specific industry users.

[0053] In another related art, endogenous security of optical communication networks is realized based on physical layer secure signal processing, including far noise zone, near noise zone, and immersion noise zone, as well as secure transmission path and secure negotiation path. In this technical solution, information is transmitted after being superimposed with noise, and the eavesdropper cannot judge or recover the effective information, which can realize endogenous security optical transmission compatible with existing communication systems. However, the introduction of noise in the immersion noise zone affects the quality of the information recovered at the receiving end from the immersion noise zone, and there is a certain degradation, which reduces the transmission performance and distance.

[0054] In a first aspect, an embodiment of the present application provides a signal transmission method based on an optical network, applied to a modulation device, such asFigure 1 The method comprises:

[0055] Step 101: receiving first control information generated by a management device; the first control information at least carries chirp phase information for phase modulation of an optical signal.

[0056] Exemplarily, the modulation device can be a modulation apparatus of a sending end in an optical network intrinsic security system, configured to receive the first control information sent by the management device, and perform phase modulation on an initial optical signal based on the first control information to obtain an encrypted optical signal. The management device can be a management apparatus in the optical network intrinsic security system, configured to generate first control information of the initial optical signal based on a first rule, where the first rule can be determined according to actual conditions, which is not limited herein.

[0057] Exemplarily, the first control information can be control instruction information, which can instruct the modulation device to perform phase modulation on the initial optical signal according to chirp phase information in the first control information. In some embodiments, the chirp phase information can be loading phase information loaded to the initial optical signal, specifically a kind of phase modulation signal, and the chirp phase information at least includes first period information corresponding to the chirp phase information. The first period information can be the same as or different from period information of the initial optical signal, which is not limited herein.

[0058] Step 102: converting the chirp phase information to obtain first digital information corresponding to the chirp phase information.

[0059] It can be understood that the first digital information can be a digital signal representing the chirp phase information. The chirp phase information in the first control information is instruction information, which cannot directly act on the initial optical signal. After the modulation device receives the chirp phase information in the first control information, the chirp phase information needs to be converted into a digital signal to obtain first digital information corresponding to the chirp phase information, and then the initial optical signal is modulated based on the first digital information corresponding to the chirp phase information.

[0060] Exemplarily, the modulation device at least includes a digital signal generation unit, configured to receive the chirp phase information in the first control information sent by the management device; further configured to convert the chirp phase information based on a second rule to obtain first digital information corresponding to the chirp phase information; and further configured to send the first digital information. The second rule can be determined according to actual conditions, which is not limited herein.

[0061] Step 103: performing phase modulation on the initial optical signal to be sent based on the first digital information to obtain an encrypted optical signal.

[0062] Exemplarily, the first digital information can be converted into analog information, and the initial optical signal to be transmitted is phase-modulated based on the analog information, where the analog information can be analog information representing chirp phase information, and the analog information is a kind of electrical signal and can be loaded to the initial optical signal.

[0063] In an application example, the initial optical signal to be transmitted is phase-modulated based on the first digital information to obtain the encrypted optical signal, including:

[0064] The first digital information is converted into analog information corresponding to a driving signal of the initial optical signal.

[0065] The initial optical signal is phase-modulated based on the driving signal to obtain the encrypted optical signal.

[0066] Exemplarily, the first digital information can be converted into analog information, and the initial optical signal to be transmitted is phase-modulated based on the analog information, where the analog information can be analog information representing chirp phase information, and the analog information is a kind of electrical signal and can be loaded to the initial optical signal.

[0067] Exemplarily, the modulation device further includes a digital-to-analog conversion unit configured to receive the first digital information sent by the digital signal generation unit, and configured to convert the first digital information into analog information corresponding to a driving signal of the initial optical signal, and configured to send the driving signal.

[0068] Exemplarily, the modulation device further includes a phase modulation unit configured to receive the driving signal sent by the digital-to-analog conversion unit, and configured to phase-modulate the initial optical signal based on the driving signal to obtain the encrypted optical signal, and configured to send the encrypted optical signal.

[0069] In an application example, the first control information further carries modulation time information for phase-modulating the optical signal, and before the initial optical signal to be transmitted is phase-modulated based on the first digital information to obtain the encrypted optical signal, the method further includes:

[0070] The modulation time information is converted into second digital information corresponding to the modulation time information.

[0071] The starting time for phase-modulating the initial optical signal is determined based on the second digital information.

[0072] It can be understood that the modulation time information can be a modulation time for phase modulation of the optical signal; and the second digital information can be a digital signal representing the modulation time information. The modulation time information in the first control information is instruction information and cannot directly act on the initial optical signal. After the modulation device receives the modulation time information in the first control information, the modulation time information needs to be converted into the second digital information corresponding to the modulation time information, and then the initial optical signal is modulated based on the second digital information corresponding to the modulation time information.

[0073] Exemplarily, the digital signal generation unit is configured to receive the modulation time information in the first digital information sent by the management device; is further configured to convert the modulation time information to obtain the second digital information corresponding to the modulation time information; and is further configured to send the second digital information.

[0074] Exemplarily, the start time of phase modulation of the initial optical signal can be a start time of loading the phase modulation signal. The start time of phase modulation of the initial optical signal based on the second digital information can be that the second digital information is corresponded to a transmission position of the initial optical signal to obtain a start time of phase modulation of the initial optical signal at the transmission position of the initial optical signal. For example, the second digital information can represent that the phase modulation starts at a second cycle time of the optical signal transmission. According to the second digital information, a position of starting phase modulation on the initial optical signal is determined, and then a start time of phase modulation of the initial optical signal at the position is determined.

[0075] In an application example, the driving signal includes a chirp phase signal of the first cycle information, the chirp phase signal corresponds to the chirp phase information; and the initial optical signal is phase modulated based on the driving signal to obtain the encrypted optical signal, including:

[0076] The initial optical signal is phase modulated based on the chirp phase signal of the first cycle information to obtain the encrypted optical signal.

[0077] Exemplarily, the first cycle information can be a period of the chirp phase signal; and the initial optical signal is phase modulated based on the chirp phase signal of the first cycle information, which can be understood as that the chirp phase signal is loaded as an additional phase on the initial optical signal to introduce a phase chirp on the initial optical signal; and the chirp introduced by dispersion after fiber transmission and the phase chirp are compensated, so that the initial optical signal is distorted in the time domain to obtain the encrypted optical signal.

[0078] In some embodiments, the driving signal can include a chirp phase signal of first frequency information; and the phase modulation is performed on the initial optical signal based on the driving signal to obtain the encrypted optical signal, including: performing phase modulation on the initial optical signal based on the chirp phase signal of the first frequency information to obtain the encrypted optical signal. Wherein, the first frequency information can be the frequency of the chirp phase signal; the frequency period of the chirp phase signal and the frequency of the chirp phase signal are reciprocal.

[0079] It can be understood that the eavesdropper probes the encrypted optical signal on the link, and due to the change of the intensity of the encrypted optical signal, the actual intensity and period of the encrypted optical signal will be misjudged, and the encrypted optical signal will be demodulated incorrectly. As shown in Figure 3 For the four initial optical signals of "1111", the period of each optical signal is T / 4, and the frequency is 4f; the chirp phase with a period of T and a frequency of f is loaded, at this time, the four initial optical signals are loaded with different sizes of chirp phase information, and after transmission through an optical fiber, due to the compensation of the chirp introduced by dispersion and the chirp introduced by phase modulation, the time domain waveform of the initial optical signal is distorted, part of the initial optical signal is compressed and the intensity peak value is increased, part of the initial optical signal is widened and the intensity peak value is greatly reduced, and if the peak value of the widened signal is lower than the judgment threshold, even similar to the noise level, the encrypted optical signal is obtained. At this time, if the eavesdropper obtains the encrypted optical signal based on the threshold, only one "1" code can be judged, and the others are noise, and the eavesdropper will misjudge that there is only one initial optical signal in the period in the process of recovering the signal, so that the frequency is misjudged from 4f to f, and a large amount of data is lost.

[0080] It should be noted that the chirp phase is introduced at the sending end, and the modulation time, frequency / period of the chirp phase can be flexibly set through coding, so that the introduced phase modulation can be flexibly configured, and the distortion size, intensity, shape and period of the optical signal after transmission through the optical fiber are different, so that it is difficult to be cracked by the eavesdropper. As shown in Figure 4 Two chirp phases with different modulation times are shown.

[0081] Step 104: sending the encrypted optical signal.

[0082] Exemplarily, the modulation device sends the encrypted optical signal to an optical network, which can be an optical transport network (OTN), a network architecture based on optical fiber communication technology, used to realize the transmission and exchange of optical signals. The encrypted optical signal can be transmitted to the demodulation device through the optical network.

[0083] In a second aspect, the embodiments of the present application provide a signal transmission method based on an optical network, applied to a demodulation device, as shown in Figure 2 The method includes:

[0084] Step 201: receiving second control information generated by a management device and an encrypted optical signal sent by a modulation device; the second control information at least carries chirp phase information used for phase compensation of the encrypted optical signal.

[0085] Exemplarily, the demodulation device can be a demodulation apparatus of a receiving end in an optical network intrinsic security system, configured to receive second control information sent by a management device and an encrypted optical signal sent by a modulation device; and demodulate the encrypted optical signal based on the second control information to obtain an initial optical signal. The management device can be a management apparatus in the optical network intrinsic security system, configured to generate first control information of the initial optical signal based on a third rule, where the third rule can be determined according to actual conditions, which is not limited herein. It can be understood that the third rule can be the same as the first rule, and correspondingly, the second control information can be the same as the first control information. In some embodiments, the second control information can not include modulation time information used for phase modulation of the optical signal.

[0086] Exemplarily, the second control information can be control instruction information, which can instruct the demodulation device to demodulate the encrypted optical signal according to the chirp phase information in the second control information. In some embodiments, the chirp phase information at least includes first period information corresponding to the chirp phase information.

[0087] Step 202: performing phase compensation on the encrypted optical signal based on the chirp phase information to obtain the initial optical signal.

[0088] In an application example, performing phase compensation on the encrypted optical signal based on the chirp phase information to obtain the initial optical signal includes:

[0089] determining first period information of the chirp phase information;

[0090] performing phase shift on the encrypted optical signal based on the chirp phase information until second period information of the encrypted optical signal after phase shift is consistent with the first period information, to determine a demodulation time of the encrypted optical signal;

[0091] performing phase compensation on the encrypted optical signal based on the demodulation time and the chirp phase information to obtain the initial optical signal.

[0092] It can be understood that the waveform of the encrypted optical signal is different from the waveform of the initial optical signal. In the embodiments of the present application, the chirp phase information based on the first period information is used to perform phase shift on the encrypted optical signal, so that the waveform of the encrypted optical signal after phase shift is the same as the waveform of the initial optical signal, and further, the second period information of the encrypted optical signal after phase shift is consistent with the first period information.

[0093] Exemplarily, the demodulation device at least comprises a clock extraction unit, configured to receive the encrypted optical signal sent by the modulation device, and receive the chirp phase information in the second control information sent by the management device; and further configured to determine first period information of the chirp phase information; and further configured to send the first period information and the chirp phase information.

[0094] Exemplarily, the demodulation device at least further comprises a phase shift unit, configured to receive the first period information and the chirp phase information sent by the clock extraction unit; and further configured to perform phase shift on the encrypted optical signal based on the chirp phase information until second period information of the encrypted optical signal after phase shift is consistent with the first period information, to determine a demodulation time of the encrypted optical signal; and further configured to send the demodulation time and the chirp phase information.

[0095] Exemplarily, the demodulation device at least further comprises a phase compensation unit, configured to receive the demodulation time and the chirp phase information sent by the phase shift unit; and further configured to perform phase compensation on the encrypted optical signal based on the demodulation time and the chirp phase information, to obtain the initial optical signal.

[0096] In the embodiments of the present application, the modulation device at the sending end introduces the chirp phase, and loads the phase on the initial optical signal to obtain the encrypted optical signal; the demodulation device at the receiving end compensates the phase according to the same design rule to obtain the initial optical signal from the encrypted optical signal, and the process of loading the phase and compensating the phase does not introduce additional noise influence, thereby improving the transmission performance.

[0097] In a third aspect, the embodiments of the present application provide a signal transmission device based on an optical network, applied to a modulation device, as shown in the figure, the signal transmission device 500 comprises: Figure 5 As shown in the figure, the signal transmission device 500 comprises:

[0098] A first receiving unit 501, configured to receive first control information generated by a management device; the first control information at least carries chirp phase information used for phase modulation on an optical signal;

[0099] A first conversion unit 502, configured to convert the chirp phase information to obtain first digital information corresponding to the chirp phase information;

[0100] A modulation unit 503, configured to perform phase modulation on an initial optical signal to be sent based on the first digital information, to obtain an encrypted optical signal;

[0101] A sending module 504, configured to send the encrypted optical signal.

[0102] In some embodiments, the modulation unit 503 is further configured to perform analog conversion on the first digital information to obtain a driving signal corresponding to the initial optical signal; and perform phase modulation on the initial optical signal based on the driving signal, to obtain the encrypted optical signal.

[0103] In some embodiments, the first control information also carries modulation time information for phase modulation of the optical signal, and the modulation unit 503 is further configured to convert the modulation time information into second digital information corresponding to the modulation time information; and determine a starting time for phase modulation of the initial optical signal based on the second digital information.

[0104] In some embodiments, the driving signal comprises a chirp phase signal of first periodic information, and the chirp phase signal corresponds to the chirp phase information; and the modulation unit 503 is further configured to perform phase modulation on the initial optical signal based on the chirp phase signal of the first periodic information to obtain the encrypted optical signal.

[0105] In a fourth aspect, the embodiments of the present application provide a signal transmission device based on an optical network, which is applied to a demodulation device, such as Figure 6 As shown in the figure, the signal transmission device 600 comprises:

[0106] A second receiving unit 601 is configured to receive second control information generated by a management device and an encrypted optical signal sent by a modulation device; and the second control information at least carries chirp phase information for phase compensation of the encrypted optical signal.

[0107] A compensation unit 602 is configured to perform phase compensation on the encrypted optical signal based on the chirp phase information to obtain an initial optical signal.

[0108] In some embodiments, the compensation unit 602 is further configured to determine first periodic information of the chirp phase information; perform phase shift on the encrypted optical signal based on the chirp phase information until a second periodic information of the encrypted optical signal after phase shift is consistent with the first periodic information, to determine a demodulation time of the encrypted optical signal; and perform phase compensation on the encrypted optical signal based on the demodulation time and the chirp phase information to obtain the initial optical signal.

[0109] It should be noted that the signal transmission device based on the optical network provided in the above embodiments is only taken as an example for the division of the above program modules in the control, and in actual applications, the above processing can be completed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules to complete all or part of the above processing. In addition, the signal transmission device based on the optical network provided in the above embodiments and the foregoing signal transmission method based on the optical network belong to the same concept, and the specific implementation process is detailed in the method embodiments, which will not be described here.

[0110] In a fifth aspect, based on the hardware implementation of the above program modules, and in order to implement the method of the modulation device side in the embodiments of the present application, the embodiments of the present application provide a modulation device, Figure 7 Only an exemplary structure of the modulation device is shown instead of all structures, and the modulation device can be implemented according to needs Figure 7The illustrated partial or entire structure.

[0111] As Figure 7 shown, the modulation device 700 provided by the embodiments of the present application includes at least one processor 701, a memory 702 and a user interface 703. The various components in the modulation device 700 are coupled together by a bus system 704. It can be understood that the bus system 704 is used to realize the connection communication between the components. The bus system 704 includes a data bus, a power bus, a control bus and a status signal bus in addition to the data bus. However, for the purpose of clear illustration, all the buses are marked as the bus system 704 in the Figure 7 .

[0112] The user interface 703 can include a display, a keyboard, a mouse, a trackball, a click wheel, a key, a button, a touchpad or a touch screen, etc.

[0113] The memory 702 in the embodiments of the present application is used to store various types of data to support the operation of the modulation device. Examples of the data include any computer programs used for operating on the modulation device.

[0114] The signal transmission method based on an optical network of the modulation device disclosed by the embodiments of the present application can be applied in or implemented by the processor 701. The processor 701 can be an integrated circuit chip with the processing capability of signals. In the implementation process, the steps of the signal transmission method based on an optical network of the modulation device can be completed by the integrated logic circuit of hardware or the instruction of software form in the processor 701. The processor 701 mentioned above can be a general processor, a digital signal processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The processor 701 can realize or execute the methods, steps and logic block diagrams disclosed by the embodiments of the present application. The general processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the methods disclosed by the embodiments of the present application, the hardware coding processor can be directly executed to complete, or the hardware and software module combination in the coding processor can be executed to complete. The software module can be located in the storage medium in the memory 702, and the processor 701 reads the information in the memory 702 and combines the hardware to complete the steps of the signal transmission method based on an optical network of the modulation device provided by the embodiments of the present application.

[0115] In the exemplary embodiments, the modulation device 700 can be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors (Microprocessors), or other electronic elements for performing the foregoing methods.

[0116] In a sixth aspect, based on the hardware implementation of the foregoing program modules, and in order to implement the method of the demodulation device side according to the embodiments of the present application, the embodiments of the present application provide a demodulation device, Figure 8 Only exemplary structures of the demodulation device are shown, not all structures, and the structures can be implemented as needed Figure 8 part or all of the structures shown.

[0117] As Figure 8 shown, the demodulation device 800 provided by the embodiments of the present application includes at least one processor 801, a memory 802, and a user interface 803. The various components in the demodulation device 800 are coupled together through a bus system 804. It can be understood that the bus system 804 is used to realize the connection communication between the components. The bus system 804 includes not only a data bus, but also a power bus, a control bus, and a status signal bus. However, for the purpose of clear illustration, all kinds of buses are marked as the bus system 804 in Figure 8 .

[0118] The user interface 803 can include a display, a keyboard, a mouse, a trackball, a click wheel, a key, a button, a touchpad, or a touch screen, etc.

[0119] The memory 802 in the embodiments of the present application is used to store various types of data to support the operation of the demodulation device. Examples of these data include any computer programs used to operate on the demodulation device.

[0120] The method for transmitting signals based on an optical network by the demodulation device disclosed in the embodiments of the present application can be applied to the processor 801 or implemented by the processor 801. The processor 801 can be an integrated circuit chip with processing capability of signals. In the implementation process, the steps of the method for transmitting signals based on an optical network by the demodulation device can be completed by the integrated logic circuits or the instructions in the form of software in the processor 801. The processor 801 described above can be a general processor, a digital signal processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The processor 801 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiments of the present application, the steps can be directly embodied as hardware coding of the processor to perform, or be executed by a combination of hardware and software modules in the coding processor. The software module can be located in a storage medium, and the storage medium is located in the memory 802. The processor 801 reads information in the memory 802 and combines the hardware to complete the steps of the method for transmitting signals based on an optical network by the demodulation device provided in the embodiments of the present application.

[0121] In the exemplary embodiments, the demodulation device 800 can be implemented by one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field programmable gate arrays (FPGAs), general-purpose processors, controllers, micro controllers (MCUs), microprocessors (Microprocessors), or other electronic elements, for executing the foregoing method.

[0122] In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. Figure 9 In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp phase information used for phase compensation of the encrypted optical signal. In a seventh aspect, the embodiments of the present application provide a signal transmission system based on an optical network, as shown in the accompanying drawings, the signal transmission system comprises a management device, the modulation device provided in any of the foregoing embodiments, and the demodulation device provided in any of the foregoing embodiments; wherein the management device is configured to send first control information to the modulation device, and send second control information to the demodulation device, the first control information at least carrying chirp phase information used for phase modulation of the optical signal, and the second control information at least carrying chirp

[0123] Exemplarily, the signal transmission system can be an optical network intrinsic security system; the modulation device can be a modulation apparatus of a sending end in the optical network intrinsic security system; the demodulation device can be a demodulation apparatus of a receiving end in the optical network intrinsic security system; and the management device can be a management apparatus in the optical network intrinsic security system.

[0124] The modulation apparatus of the sending end mainly comprises a phase modulation unit, a digital-to-analog conversion unit and a digital signal generation unit; and the demodulation apparatus of the receiving end mainly comprises a phase compensation unit, a clock extraction unit and a phase shift unit. The specific functions are as follows:

[0125] The management apparatus: at the sending end, generates first control information according to a set first rule, and sends the first control information to the modulation apparatus of the sending end, so as to control the digital signal generation unit to generate digital information corresponding to the control information based on a second rule. At the receiving end, generates second control information according to a third rule corresponding to the set first rule, and sends the second control information to the demodulation apparatus of the receiving end, so as to control the clock extraction unit to determine a correct signal period.

[0126] The first control information and the second control information can be consistent, for example, the first control information informs the sending end that the frequency of the loaded phase modulation signal is f, and the second control information also informs the receiving end that the phase modulation frequency of the phase modulation signal is f, otherwise the original optical signal cannot be correctly recovered.

[0127] The digital signal generation unit: generates digital information capable of being loaded to the optical signal according to the received first control information and according to the second rule.

[0128] The digital-to-analog conversion unit: converts the received digital information into analog information, and sends the analog information to the phase modulation unit as a driving signal.

[0129] The phase modulation unit: performs phase modulation on the unencrypted optical signal generated by the signal light source according to the loaded driving signal.

[0130] The clock extraction unit: confirms the correct period of the signal distorted after transmission of the phase information loaded in the received second control information according to the received second control information.

[0131] The phase shift unit: adjusts the time window of the optical signal to realize alignment of the signal period and a judgment window. The judgment window is the starting position of the phase modulation of the optical signal.

[0132] The phase compensation unit compensates the phase to recover the original unencrypted optical signal. The phase compensation unit can be a grating, a phase modulator or the like, and determines the phase modulation period / frequency of the signal modulation signal according to the second control information, so that the grating or the like determines the introduced phase compensation period / frequency, and performs phase compensation by adjusting the phase modulation signal, and observes the waveform change of the optical signal. If the waveform of the optical signal is restored to be consistent with the waveform corresponding to the period before phase modulation, the subsequent optical-electric conversion and demodulation process is performed, and whether the demodulated optical signal has an error code is determined. If there is no error code, it is determined that the compensation period and size are appropriate.

[0133] The above units are core units, and the physical connection order is not limited, and other units can be introduced into the system to improve the function or performance.

[0134] It should be noted that "first", "second" and the like are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.

[0135] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0136] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method of signal transmission based on an optical network, characterized by, The method is applied to a modulation device, and the method comprises: receiving first control information generated by a management device; the first control information at least carries chirp phase information used for phase modulation of an optical signal; converting the chirp phase information to obtain first digital information corresponding to the chirp phase information; phase modulating an initial optical signal to be sent based on the first digital information to obtain an encrypted optical signal; sending the encrypted optical signal.

2. The method of claim 1, wherein, The phase modulating of the initial optical signal to be sent based on the first digital information to obtain the encrypted optical signal comprises: analog converting the first digital information to obtain a driving signal corresponding to the initial optical signal; phase modulating the initial optical signal based on the driving signal to obtain the encrypted optical signal.

3. The method according to claim 1 or 2, characterized in that, The first control information further carries modulation time information used for phase modulation of an optical signal, and before the phase modulating of the initial optical signal to be sent based on the first digital information to obtain the encrypted optical signal, the method further comprises: converting the modulation time information to obtain second digital information corresponding to the modulation time information; determining a starting time of the phase modulation of the initial optical signal based on the second digital information.

4. The method of claim 2, wherein, The driving signal comprises a chirp phase signal of first period information, the chirp phase signal corresponds to the chirp phase information; and the phase modulating of the initial optical signal based on the driving signal to obtain the encrypted optical signal comprises: phase modulating the initial optical signal based on the chirp phase signal of the first period information to obtain the encrypted optical signal.

5. A method of signal transmission based on an optical network, characterized by, The method is applied to a demodulation device, and the method comprises: receiving second control information generated by a management device and an encrypted optical signal sent by a modulation device; the second control information at least carries chirp phase information used for phase compensation of the encrypted optical signal; phase compensating the encrypted optical signal based on the chirp phase information to obtain an initial optical signal.

6. The method of claim 5, wherein, The phase compensating of the encrypted optical signal based on the chirp phase information to obtain the initial optical signal comprises: determining first period information of the chirp phase information; phase shifting the encrypted optical signal based on the chirp phase information until second period information of the encrypted optical signal after the phase shifting is consistent with the first period information to determine a demodulation time of the encrypted optical signal; phase compensating the encrypted optical signal based on the demodulation time and the chirp phase information to obtain the initial optical signal.

7. A signal transmission device based on an optical network, characterized in that, The signal transmission device is applied to a modulation device, and the signal transmission device comprises: a first receiving unit configured to receive first control information generated by a management device; the first control information at least carries chirp phase information used for phase modulation of an optical signal; a first converting unit configured to convert the chirp phase information to obtain first digital information corresponding to the chirp phase information; a modulation unit configured to phase modulate an initial optical signal to be sent based on the first digital information to obtain an encrypted optical signal; a sending module configured to send the encrypted optical signal.

8. An optical network-based signal transmission apparatus, characterized by comprising: The signal transmission device is applied to a demodulation device, and the signal transmission device comprises: The second receiving unit is configured to receive second control information generated by the management device and encrypted optical signals transmitted by the modulation device, wherein the second control information carries at least chirp phase information used for phase compensation of the encrypted optical signals. The compensation unit is configured to perform phase compensation on the encrypted optical signals based on the chirp phase information to obtain initial optical signals.

9. A modulation device, characterized by The modulation device comprises a first processor and a first memory configured to store a computer program capable of running on the first processor, wherein The first processor is configured to execute the computer program to perform the steps of the method in any one of claims 1 to 4.

10. A demodulation device characterized by comprising: The demodulation device comprises a second processor and a second memory configured to store a computer program capable of running on the second processor, wherein The second processor is configured to execute the computer program to perform the steps of the method in any one of claims 5 to 6.

11. An optical network-based signal transmission system, characterized by comprising: The modulation device comprises a first processor and a first memory configured to store a computer program capable of running on the first processor, wherein 12. A computer storage medium having stored thereon a computer program, characterized in that The first processor is configured to execute the computer program to perform the steps of the method in any one of claims 1 to 4. The demodulation device comprises a second processor and a second memory configured to store a computer program capable of running on the second processor, wherein The second processor is configured to execute the computer program to perform the steps of the method in any one of claims 5 to 6. The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 4 or the steps of the method in any one of claims 5 to 6.

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