Method and system for resisting time service deception interference
By constructing a hierarchical model of the working status of timing devices and an automatic correction model, the problem of concealed deception and interference of multi-source timing signals was solved, and the normal operation and rapid recovery of timing devices in complex scenarios were realized.
Patent Information
- Application Number
- CN202511315600.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-01-02
AI Technical Summary
Existing technologies lack research on anti-interference measures for complex scenarios involving concealed deception and interference from multi-source timing signals, making timing devices susceptible to timing deception and interference, leading to serious deviations in timing results or even systemic disasters.
Construct a hierarchical model of the working status of timing equipment, monitor the equipment status in real time, automatically correct the time difference factor and issue alarms when necessary, and combine manual repair to improve the ability to resist time synchronization fraud interference.
Under complex time synchronization deception and interference scenarios, the system enables automatic correction and manual repair of timing devices, ensuring their normal operation and enhancing their resistance to time synchronization deception and interference.
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Figure CN121254579A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of time signal processing. More particularly, it relates to a method and system for resisting time fraud interference. BACKGROUND
[0002] Accurate and reliable time acquisition is a prerequisite for the safe and stable operation of important fields such as national power, communication, transportation, finance and national defense. Currently, the main ways to obtain time include navigation satellite wireless time service and wired network time service. However, both navigation systems and network systems have security risks, and the time signal transmission path is subject to complex deception interference. Therefore, timing devices are vulnerable to different types of time fraud interference, which can cause serious deviation in timing results, abnormal operation of timing devices, and even systemic disasters. Current research on resisting time interference mainly focuses on resisting navigation signal suppression interference and navigation signal deception interference detection, but lacks research on resisting interference in complex scenarios of multi-source time signal hidden deception interference. Therefore, a new type of time fraud interference resisting method that integrates multi-source time signal comprehensive deception interference detection and automatic repair is needed to effectively improve the anti-time fraud interference capability of timing devices. SUMMARY
[0003] The present application aims to provide a method and system for resisting time fraud interference to solve at least one of the problems in the prior art.
[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:
[0005] The present application provides a method for resisting time fraud interference, which comprises:
[0006] establishing a timing device working state classification model;
[0007] using the timing device working state classification model to determine whether the timing device is working normally according to a timing device time difference factor of the timing device;
[0008] The determination of whether the timing device is working normally comprises: if not, determining whether the timing device is working degradedly.
[0009] The determination of whether the timing device is working degradedly comprises: if yes, establishing a timing device time difference offset correction model, using the timing device time difference offset correction model to automatically correct the timing device time difference factor, and determining whether the timing device is working normally after the automatic correction of the timing device time difference factor.
[0010] Optionally, the determination of whether the timing device is working degradedly comprises: if not, issuing an alarm signal.
[0011] Optionally, the timing device working state grading model is:
[0012]
[0013] wherein, Δt is the timing device time difference factor; α is the timing device working normal detection threshold; β is the timing device working error detection threshold; comp() is the timing device time difference comparison function; P=1 is the timing device working normal; P=0 is the timing device working degraded; P=-1 is the timing device working error.
[0014] Optionally, the calculation formula of the timing device time difference factor is:
[0015]
[0016] wherein, K is the timing device inherent timing accuracy; u is the timing device time base frequency standard factor; v is the timing device time base frequency drift factor; t is the working time length of the timing device since starting; T is the timing device time difference factor calibration period; n is the timing device time difference factor calibration period count.
[0017] Optionally, the timing device time difference offset correction model is:
[0018]
[0019] wherein, Δt α is the timing device time difference automatic correction parameter; s(t ' ) is the timing device time offset dynamic compensation.
[0020] Optionally, the calculation formula of the timing device time difference automatic correction parameter is:
[0021]
[0022] wherein, t ' is the time length of the latest timing device working degradation.
[0023] Optionally, the calculation formula of the time length of the latest timing device working degradation is:
[0024] t′=t-arg(t,Δt=α)
[0025] wherein, arg() is the timing inverse function, and arg(t,Δt=α) is the time t of the latest Δt=α.
[0026] Optionally, the calculation formula of the timing device time offset dynamic compensation is:
[0027]
[0028] Wherein, ω is a timing device time offset compensation factor.
[0029] Optionally, the calculation formula of the timing device time offset compensation factor is:
[0030]
[0031] Wherein, diff() is a timing device time offset derivative function.
[0032] The second aspect of the present application provides a system for resisting time service deception interference, which comprises:
[0033] A first modeling unit is configured to establish a timing device working state hierarchical model.
[0034] A first judging unit is configured to determine whether the timing device is working normally according to the timing device time difference factor of the timing device by using the timing device working state hierarchical model, and if not, determine whether the timing device is working degradedly.
[0035] The first judging unit is configured to determine whether the timing device is working degradedly, and if so, establish a timing device time difference offset correction model, automatically correct the timing device time difference factor by using the timing device time difference offset correction model, and determine whether the timing device is working normally after the automatic correction of the timing device time difference factor.
[0036] The present application has the following beneficial effects:
[0037] The technical solution of the present application is aimed at the complex time service deception interference situation such as temporary or continuous time service deception interference of the timing device, establishes a timing device working state hierarchical model, monitors the working state of the timing device in real time, automatically corrects the timing device when the working state is degraded, and issues an alarm to take manual repair when the working state of the timing device is wrong, so that the timing device has the ability to resist complex time service deception interference. BRIEF DESCRIPTION OF DRAWINGS
[0038] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.
[0039] Figure 1 A flow chart of the method for resisting time service deception interference provided by the embodiment of the present application is shown. DETAILED DESCRIPTION
[0040] In order to more clearly illustrate the present application, the present application will be further described below with reference to the embodiments and the accompanying drawings. Similar components are denoted by the same reference numerals in the drawings. Those skilled in the art should understand that the specific description below is illustrative rather than limiting, and should not limit the protection scope of the present application.
[0041] The current research on anti-time service interference mainly focuses on anti-navigation signal suppression interference and navigation signal deception interference detection, and lacks anti-interference research on complex scenes of multi-source time service signal hidden deception interference. Therefore, a new type of anti-time service deception interference method integrating multi-source time service comprehensive deception interference detection and automatic repair is needed to effectively improve the anti-time service deception interference capability of timing equipment.
[0042] Therefore, as shown in the Figure 1 An embodiment of the present application provides a method for resisting time service deception interference, which comprises: establishing a timing equipment working state classification model; determining whether the timing equipment is working normally according to a timing equipment time difference factor of the timing equipment by using the timing equipment working state classification model; the determination of whether the timing equipment is working normally comprises: if not, determining whether the timing equipment is working degraded; the determination of whether the timing equipment is working degraded comprises: if yes, establishing a timing equipment time difference offset correction model, automatically correcting the timing equipment time difference factor by using the timing equipment time difference offset correction model, and determining whether the timing equipment is working normally after the timing equipment time difference factor is automatically corrected.
[0043] In a specific example, the timing equipment has the ability to resist time service deception interference by real-time monitoring of the working state of the timing equipment and combining automatic correction and manual repair modes. After the timing equipment starts working, whether the working state of the timing equipment is normal is determined in real time according to the timing equipment working state classification model and the timing equipment time difference factor, and the timing equipment time difference factor is periodically calibrated; if the timing equipment is temporarily interfered by time service deception, causing the timing equipment to work degraded, the timing equipment time difference factor is dynamically compensated by using the timing equipment time difference offset correction model and the timing equipment time offset dynamic compensation model, and then the timing equipment time difference factor is automatically corrected, so that the timing equipment gradually recovers to work normally; if the timing equipment is continuously interfered by time service deception, triggering the timing equipment to work incorrectly and issuing an alarm, the timing equipment needs to be manually repaired to recover to work normally.
[0044] The embodiment aims at complex time service deception interference situations such as temporary or continuous time service deception interference of the timing equipment, establishes a timing equipment working state classification model, determines in real time whether the working state of the timing equipment is normal, automatically corrects when the timing equipment works degraded, issues an alarm when the timing equipment works incorrectly, and takes manual repair, so that the timing equipment has the ability to resist complex time service deception interference.
[0045] In a possible implementation manner, the determination of whether the timing equipment is working degraded comprises: if not, issuing an alarm signal.
[0046] In a specific example, because the model is always running, that is, always judging the working state of the timing device, if it is working normally at this moment, it is judged whether it is working normally at the next moment, until the working is degraded, and then automatically corrected, and after the automatic correction, it is judged whether it is working normally, and so on. Finally, until the working is wrong, an alarm is issued, and at this time the model stops running.
[0047] In a possible implementation, the timing device working state grading model is:
[0048]
[0049] In the formula, Δt is a timing device time difference factor; α is a timing device working normal detection threshold; β is a timing device working error detection threshold; comp() is a timing device time difference comparison function; P=1 is a timing device working normally; P=0 is a timing device working degradation; and P=-1 is a timing device working error.
[0050] In a specific example, a timing device working state grading model is constructed to indicate the working state of the timing device.
[0051] Further, the timing device working state grading model is constructed as follows:
[0052]
[0053] In the formula, P: timing device working state indication factor, wherein: P=1, indicating that the timing device is working normally; P=0, indicating that the timing device is working degraded and needs to be automatically corrected; and P=-1, indicating that the timing device is working wrong and needs to be manually repaired;
[0054] comp(): timing device time difference comparison function;
[0055] Δt: timing device time difference factor, indicating the timing result deviation of the timing device;
[0056] α: timing device working normal detection threshold, typically, α=1us;
[0057] β: timing device working error detection threshold, typically, β=10ms.
[0058] The timing device working state grading model can be used to monitor the working state of the timing device in real time. If the timing device is degraded, it indicates that the timing device is temporarily interfered by time fraud and needs to be automatically corrected to restore normal working. If the timing device is wrong, it indicates that the timing device is continuously interfered by time fraud and needs to be manually repaired to restore normal working.
[0059] In a possible implementation, the calculation formula of the timing device time difference factor is:
[0060]
[0061] In the formula, K is the inherent timing precision of the timing device; u is the timing base frequency accuracy factor of the timing device; v is the timing base frequency drift factor of the timing device; t is the working time length of the timing device since starting; T is the timing device time difference factor calibration period; and n is the timing device time difference factor calibration period count.
[0062] In a specific example, a timing device time difference factor calibration model is constructed for periodically calibrating the time difference factor of the timing device.
[0063] Further, the timing device time difference factor calibration model is constructed as follows:
[0064]
[0065] In the formula, Δt is the timing device time difference factor, indicating the timing result deviation of the timing device;
[0066] K is the inherent timing precision of the timing device, typically K=50 ns;
[0067] u is the timing base frequency accuracy factor of the timing device, indicating the frequency accuracy of the timing device, typically u=5E-10;
[0068] v is the timing base frequency drift factor of the timing device, indicating the frequency drift rate of the timing device, typically v=(1E-10) / d, d is day, indicating 1 day, and (1E-10) / d indicates that the drift rate of 1 day is 1×10 -10 ;
[0069] t is the working time length of the timing device since starting;
[0070] T is the timing device time difference factor calibration period, typically T=1800 s;
[0071] n is the timing device time difference factor calibration period count.
[0072] The embodiment utilizes the timing device time difference factor calibration model, and through periodically calibrating the time difference factor of the timing device, the timing device can keep working normally without being interfered by time service fraud.
[0073] In a possible implementation, the timing device time difference offset correction model is:
[0074]
[0075] In the formula, Δt αis the automatic correction parameter of the time difference of the timing device; s(t ' is the dynamic compensation of the time difference of the timing device.
[0076] In a possible implementation, the formula for calculating the automatic correction parameter of the time difference of the timing device is as follows:
[0077]
[0078] wherein t ' is the duration of the last time when the timing device works in a degraded mode.
[0079] In a possible implementation, the formula for calculating the duration of the last time when the timing device works in a degraded mode is as follows:
[0080] t′=t-arg(t,Δt=α)
[0081] wherein arg() is the inverse function of counting, and arg(t,Δt=α) is the time t when the last Δt=α is calculated.
[0082] In a specific example, a time difference offset correction model of a timing device is constructed, which is used to automatically correct the time difference factor of the timing device.
[0083] Further, the time difference offset correction model of the timing device is constructed as follows:
[0084]
[0085] wherein,
[0086] wherein: Δt ' is the correction factor of the time difference of the timing device, which represents the correction result of the timing result deviation of the timing device;
[0087] Δt is the time difference factor of the timing device, which represents the timing result deviation of the timing device.
[0088] Δt α is the automatic correction parameter of the time difference of the timing device, which represents the value of the timing result deviation of the timing device in the degraded mode interval;
[0089] s(t ' ) is the dynamic compensation model of the time difference of the timing device;
[0090] t ' is the duration of the last time when the timing device works in a degraded mode;
[0091] α is the detection threshold of the normal working of the timing device, typically, α=1us;
[0092] β is the detection threshold of the error working of the timing device, typically, β=10ms;
[0093] u: timing device time base frequency accuracy factor, representing the frequency accuracy of the timing device, typically, u = 5E-10;
[0094] v: timing device time base frequency drift factor, representing the frequency drift rate of the timing device, typically, v = (1E-10) / d;
[0095] t: the working time length of the timing device since the last start;
[0096] arg(t, Δt = α): timing inverse function, calculating the time t of the last Δt = α.
[0097] The embodiment utilizes the timing device time difference offset correction model to automatically correct the time difference factor of the timing device when the timing device works degraded, so that the timing device gradually recovers to normal work.
[0098] In a possible implementation, the calculation formula of the timing device time offset dynamic compensation is:
[0099]
[0100] In the formula, ω is the timing device time offset compensation factor.
[0101] In a possible implementation, the calculation formula of the timing device time offset compensation factor is:
[0102]
[0103] In the formula, diff() is the timing device time offset derivative function.
[0104] In a specific example, a timing device time offset dynamic compensation model is constructed for dynamically compensating the time difference factor of the timing device.
[0105] Further, the timing device time offset dynamic compensation model is constructed as follows:
[0106]
[0107] In the formula, s(t
[0108] In the formula, s(t ' ): timing device time offset dynamic compensation model;
[0109] t ' : the time length of the last working degradation of the timing device;
[0110] u: timing device time base frequency accuracy factor, representing the frequency accuracy of the timing device, typically, u = 5E-10;
[0111] v: timing device time base frequency drift factor, indicating the frequency drift rate of the timing device, typically, v=(1E-10) / d;
[0112] ω: timing device time offset compensation factor;
[0113] t: working time of the timing device since start-up;
[0114] arg(t,Δt=α): timing inverse function, calculating the time t of the last Δt=α;
[0115] diff(): timing device time offset derivative function.
[0116] The embodiment utilizes the timing device time offset dynamic compensation model, when the timing device works degraded, the time difference factor of the timing device is dynamically compensated, and then the time difference factor of the timing device is automatically corrected, so that the timing device gradually recovers to normal work.
[0117] Another embodiment of the application provides an anti-time transfer deception interference system, which comprises: a first modeling unit for establishing a timing device working state grading model; a first judgment unit for judging whether the timing device works normally according to a timing device time difference factor of the timing device by using the timing device working state grading model, if not, judging whether the timing device works degraded; a first judgment unit for judging whether the timing device works degraded, if yes, establishing a timing device time difference offset correction model, automatically correcting the timing device time difference factor by using the timing device time difference offset correction model, and judging whether the timing device works normally after the timing device time difference factor is automatically corrected.
[0118] The embodiment aims at the complex time transfer deception interference situation such as temporary or continuous time transfer deception interference of the timing device, constructs a timing device working state grading model, monitors whether the working state of the timing device is normal in real time, and automatically corrects when the timing device works degraded, and issues an alarm to take manual repair when the timing device works incorrectly, so that the timing device has the ability to resist complex time transfer deception interference.
[0119] In the description of the present application, it needs to be explained that the terms "upper", "lower" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0120] It also needs to be explained that in the description of the present application, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or equipment. Without more limitation, the element defined by the sentence "including a…" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.
[0121] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. For those skilled in the art, on the basis of the above description, other different forms of changes or variations can also be made, and it is impossible to enumerate all the embodiments here. Any obvious changes or variations derived from the technical solutions of the present application are still within the protection scope of the present application.
Claims
1. A method for resisting time synchronization spoofing interference, characterized in that, The method includes: Establish a hierarchical model of the working status of timing equipment; The timing device is used to determine whether the timing device is working properly based on the timing device time difference factor of the timing device working status classification model. The determination of whether the timing device is working properly includes: if not, determining whether the timing device is downgraded. The determination of whether the timing device is degraded includes: if so, establishing a timing device time difference offset correction model, automatically correcting the timing device time difference factor using the timing device time difference offset correction model, and determining whether the timing device is working normally after automatically correcting the timing device time difference factor.
2. The method for resisting time synchronization spoofing interference according to claim 1, characterized in that, The determination of whether the timing device is degraded includes: if not, issuing an alarm signal.
3. The method for resisting time synchronization spoofing interference according to claim 2, characterized in that, The hierarchical model for the working status of the timing device is as follows: In the formula, Δt is the time difference factor of the timing device; α is the normal operation detection threshold of the timing device; β is the error detection threshold of the timing device; comp() is the time difference comparison function of the timing device; P=1 indicates that the timing device is working normally; P=0 indicates that the timing device is downgraded; P=-1 indicates that the timing device is malfunctioning.
4. The method for resisting time synchronization spoofing interference according to claim 3, characterized in that, The formula for calculating the time difference factor of the timing device is as follows: In the formula, K is the inherent timing accuracy of the timing device; u is the time base frequency standard factor of the timing device; v is the time base frequency drift factor of the timing device; t is the working time after the timing device starts; T is the time difference factor adjustment cycle of the timing device; and n is the time difference factor adjustment cycle count of the timing device.
5. The method for resisting time synchronization spoofing interference according to claim 4, characterized in that, The timing device time difference offset correction model is as follows: In the formula, Δt α Automatic time difference correction parameters for timing devices; s(t) ' () is for time-biased dynamic compensation of timing devices.
6. The method for resisting time synchronization spoofing interference according to claim 5, characterized in that, The calculation formula for the automatic time difference correction parameter of the timing device is as follows: In the formula, t ' The duration of the most recent downgrade for the timing device.
7. The method for resisting time synchronization spoofing interference according to claim 6, characterized in that, The formula for calculating the duration of the most recent downgrade of the timing device is as follows: t′=t-arg(t,Δt=α) In the formula, arg() is the inverse timing function, and arg(t,Δt=α) is the time t at which the most recent Δt=α is calculated.
8. The method for resisting time synchronization spoofing interference according to claim 7, characterized in that, The calculation formula for the time-off dynamic compensation of the timing device is as follows: In the formula, ω is the timing offset compensation factor of the timing device.
9. The method for resisting time synchronization spoofing interference according to claim 8, characterized in that, The formula for calculating the timing offset compensation factor of the timing device is as follows: In the formula, diff() is the time-biased derivative function of the timing device.
10. A system for resisting time synchronization spoofing interference, characterized in that, The system includes: The first modeling unit is used to establish a hierarchical model of the working status of timing equipment. The first judgment unit is used to determine whether the timing device is working normally based on the timing device time difference factor of the timing device using the timing device working status classification model. If not, it is determined whether the timing device is downgraded. The first judgment unit is used to determine whether the timing device is degraded. If so, a timing device time difference offset correction model is established, and the timing device time difference factor is automatically corrected using the timing device time difference offset correction model. Then, it is determined whether the timing device is working normally after the timing device time difference factor is automatically corrected.