Information broadcasting method of unmanned aerial vehicle countering device and unmanned aerial vehicle countering device

Abstract

The invention provides an information broadcasting method of unmanned aerial vehicle countering equipment and the unmanned aerial vehicle countering equipment, and primary encryption and secondary encryption are sequentially performed on a broadcast information frame through an equipment key and a user key to obtain a secondary ciphertext. The equipment key is only provided by the manufacturer producing the unmanned aerial vehicle countering equipment, and the user key is only provided by the user of the unmanned aerial vehicle countering equipment, so that the risk of equipment counterfeiting is reduced, and the confidentiality of the secondary ciphertext is greatly improved. Besides, the communication information obtained based on the second-level ciphertext and the target interference waveform are subjected to orthogonal multiplexing and synthesis in the time domain, the code domain or the frequency domain to obtain a comprehensive countering signal, and the comprehensive countering signal is continuously broadcasted to the surrounding airspace while the target unmanned aerial vehicle is countered through the comprehensive countering signal. Therefore, on the basis of not influencing the original countering performance, the search time of the compliance equipment is remarkably shortened, and the overall management and control efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of unmanned aerial vehicle countermeasures, and in particular to an information broadcasting method of an unmanned aerial vehicle countermeasure device and the unmanned aerial vehicle countermeasure device. BACKGROUND

[0002] When performing a countermeasure task, the unmanned aerial vehicle countermeasure device needs to actively send task information to a general receiving device (mainly serving a regulatory department) in a designated airspace, and the task information includes control information such as device identity information and real-time working status. The core purpose of this function is to realize data intercommunication, collaborative decision-making, and state sharing between different systems, thereby building a unified, real-time, and intelligent low-altitude security defense network.

[0003] However, the existing unmanned aerial vehicle countermeasure device usually has the problems of leakage, high cost, and the possibility of identity fraud by illegal persons when sending task information. SUMMARY

[0004] The present application provides an information broadcasting method of an unmanned aerial vehicle countermeasure device and the unmanned aerial vehicle countermeasure device to achieve safe and reliable broadcasting of task information to authorized devices.

[0005] According to a first aspect of the present application, an information broadcasting method of an unmanned aerial vehicle countermeasure device is provided, and the method comprises: obtaining target information of a target unmanned aerial vehicle and calling an identity parameter built-in the device; encapsulating the target information and the identity parameter into a broadcast information frame; performing primary encryption on the broadcast information frame by a device key to obtain first-level ciphertext, wherein the device key is provided only by a manufacturer of the unmanned aerial vehicle countermeasure device; performing secondary encryption on the first-level ciphertext by a user key to obtain second-level ciphertext, wherein the user key is provided only by a user of the unmanned aerial vehicle countermeasure device; mapping the second-level ciphertext to a set communication frequency band to obtain communication information; generating a target interference waveform based on the target information; orthogonally multiplexing and synthesizing the communication information and the target interference waveform in a time domain, a code domain, or a frequency domain to obtain a comprehensive countermeasure signal; transmitting the comprehensive countermeasure signal to the target unmanned aerial vehicle and broadcasting the comprehensive countermeasure signal to a surrounding airspace.

[0006] Optionally, the device key comprises a first device public key and a first device private key, and the user key comprises a user public key and a user private key. The broadcast information frame is primarily encrypted by a device key to obtain first-level ciphertext; the first-level ciphertext is secondarily encrypted by a user key to obtain second-level ciphertext, and the process specifically includes: The broadcast information frame is primarily encrypted by a first device public key to obtain the first-level ciphertext; The first-level ciphertext is secondarily encrypted by a user private key to obtain the second-level ciphertext; The first device private key and the user public key have been transmitted to an authorized object, and the authorized object is used for monitoring the unmanned aerial vehicle countermeasure device.

[0007] Optionally, the method further includes a second device public key and a second device private key, the second device public key being different from the first device public key, and the method further includes: The second-level ciphertext is thirdly encrypted by the second device public key to obtain third-level ciphertext; The third-level ciphertext is mapped to a set communication frequency band to obtain communication information.

[0008] Optionally, the target information at least includes the position and communication frequency point of the target unmanned aerial vehicle.

[0009] Optionally, the identity parameter at least includes the user ID, device ID, device position, device type and time stamp of the unmanned aerial vehicle countermeasure device.

[0010] Optionally, the mapping method of the second-level ciphertext to the set communication frequency band at least includes orthogonal frequency division multiplexing, quadrature phase shift keying or 16-quadrature amplitude modulation. Optionally, the target interference wave includes a targeting narrowband interference or a blocking wideband interference.

[0011] Optionally, the method of quadrature multiplexing and synthesizing the communication information and the target interference waveform in the time domain, code domain or frequency domain at least includes TDMA time division multiple access, CDMA code division multiple access or FDMA frequency division multiple access.

[0012] Optionally, the method of transmitting the synthesized countermeasure signal to the target unmanned aerial vehicle includes: According to the real-time position of the target unmanned aerial vehicle, the direction of the antenna beam in the unmanned aerial vehicle countermeasure device is adjusted; After the direction of the antenna beam is adjusted, the synthesized countermeasure signal is transmitted.

[0013] According to the second aspect of the present application, a kind of unmanned aerial vehicle countermeasure device is provided, based on the information broadcast method of unmanned aerial vehicle countermeasure device provided by the first aspect of the present application and its optional implementation scheme countermeasure target unmanned aerial vehicle and broadcast comprehensive countermeasure signal to surrounding airspace.

[0014] Compared with the prior art, the technical scheme of the application has the following beneficial effects: The information broadcasting method of the unmanned aerial vehicle countermeasure equipment provided by the technical scheme of the application, the broadcast information frame is sequentially subjected to primary encryption and secondary encryption by the equipment key and the user key to obtain the secondary ciphertext. Since the equipment key is only provided by the manufacturer of the unmanned aerial vehicle countermeasure equipment, it is ensured that the unmanned aerial vehicle countermeasure equipment is manufactured by the manufacturer, and the risk of equipment counterfeiting is reduced. Since the user key is also only provided by the user of the unmanned aerial vehicle countermeasure equipment, no one can decrypt the secondary ciphertext except the equipment user and the objects authorized by the equipment user, thereby greatly improving the confidentiality of the secondary ciphertext.

[0015] In addition, since the communication information and the target interference waveform based on the secondary ciphertext are subjected to orthogonal multiplexing and synthesis in the time domain, the code domain or the frequency domain to obtain the comprehensive countermeasure signal, and the comprehensive countermeasure signal is continuously broadcast to the surrounding airspace while counteracting the target unmanned aerial vehicle, the search time of the compliant equipment is significantly shortened and the overall control efficiency is improved on the basis of not affecting the original countermeasure performance.

[0016] In summary, the information broadcasting method of the unmanned aerial vehicle countermeasure equipment provided by the application not only effectively avoids the comprehensive countermeasure signal being counterfeited or tampered with, and guarantees the integrity and authenticity of the comprehensive countermeasure signal, but also significantly shortens the search time of the compliant equipment and improves the overall control efficiency on the basis of not affecting the original countermeasure performance. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical schemes in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 The flow chart of the information broadcasting method of the unmanned aerial vehicle countermeasure equipment provided by the first embodiment of the application. DETAILED DESCRIPTION

[0019] As described in the background, the existing unmanned aerial vehicle countermeasure equipment usually has the problems of leakage, high cost and the possibility of identity fraud by illegal persons when sending task information. The following two embodiments will briefly describe the problems of the existing unmanned aerial vehicle countermeasure equipment when sending task information: (1)Public display of hard indicators: this method uses the website or document to publish the device-related information by publicly quantifying the performance of the indicators. Since the device-related information is disclosed, the relevant supervisors / authorized personnel can quickly learn the relevant information about the operation of the countermeasure device. However, this method may have a certain risk of leakage, and is less used in practice.

[0020] (2) Sending device information signals: the countermeasure device needs to send a specific frequency band signal to indicate the device information. This scheme needs to set up a special communication protocol and make it public to ensure that the signal can be effectively received by other devices. However, this scheme needs to increase the hardware cost and needs to have a certain universality. More seriously, criminals may use protocol vulnerabilities to implement identity fraud and disrupt the order of the airspace by broadcasting fake signals, which directly threatens the safety of low-altitude airspace.

[0021] Therefore, the present application provides a new information broadcasting method of the unmanned aerial vehicle countermeasure device, which encrypts the broadcast information frame by primary encryption and secondary encryption, thereby ensuring that the unmanned aerial vehicle countermeasure device is manufactured by the device, reducing the risk of device counterfeiting, and ensuring that only the device user and the object authorized by the device user can decrypt the secondary ciphertext, thereby greatly improving the confidentiality of the secondary ciphertext. And the communication information and the target interference waveform obtained based on the secondary ciphertext are orthogonally multiplexed and synthesized in the time domain, code domain or frequency domain to obtain a comprehensive countermeasure signal, and the comprehensive countermeasure signal is continuously broadcast to the surrounding airspace while counteracting the target unmanned aerial vehicle, thereby significantly shortening the search time of the compliant device and improving the overall control efficiency without affecting the original countermeasure performance.

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] The terms "first", "second", "third", "fourth" and the like in the description and in the claims of the present application, and also above-mentioned drawings, if any, are used to distinguish between similar objects, not necessarily described by their order of appearance in the specification or in the drawings. It is understood that the data thus used as such can be interchanged, where appropriate, so that the embodiments of the present application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprise" and "have", and any variations thereof, are intended to cover non-exclusive inclusions, for example, a process, method, system, product or apparatus comprising a list of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to such processes, methods, products or apparatuses.

[0024] The technical solutions of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.

[0025] Figure 1 The flow chart of the information broadcasting method of the UAV countermeasure equipment provided for the first embodiment of the present application.

[0026] Please refer to Figure 1 The information broadcasting method of the UAV countermeasure equipment provided by the present embodiment comprises the following steps: Step S1: Obtain target information of a target UAV, and call an identity parameter built-in itself.

[0027] Specifically, the target information at least includes the position and communication frequency point of the target UAV, which is not limited herein. The identity parameter at least includes the user ID, equipment ID, equipment position, equipment type and time stamp of the UAV countermeasure equipment.

[0028] Step S2: Encapsulate the target information and the identity parameter into a broadcast information frame.

[0029] Specifically, the broadcast information frame conforms to the industry standard format.

[0030] Step S3: Perform primary encryption on the broadcast information frame by using a device key to obtain a first-level ciphertext.

[0031] Specifically, the device key is only provided by the manufacturer of the UAV countermeasure equipment, so as to ensure that the UAV countermeasure equipment is manufactured by the manufacturer, thereby reducing the risk of equipment counterfeiting.

[0032] In the present embodiment, the device key includes a first device public key and a first device private key, and therefore the primary encryption on the broadcast information frame by using the device key in step S3 specifically comprises the following steps: Step S31: Hash value operation is performed on the broadcast information frame to obtain a first digital fingerprint.

[0033] Step S32: The first digital fingerprint is encrypted by a first device public key to obtain the first-level ciphertext.

[0034] Step S4: The first-level ciphertext is secondarily encrypted by a user key to obtain a second-level ciphertext.

[0035] Specifically, the user key is provided only by the user of the unmanned aerial vehicle countermeasure device, so that no one except the device user and the objects authorized by the device user can decrypt the second-level ciphertext, thereby limiting the access right to the user himself and the limited range directly authorized by the user, and further greatly improving the confidentiality of the second-level ciphertext.

[0036] In the embodiment, the user key includes a user public key and a user private key, so that the secondary encryption of the first-level ciphertext by the user key in step S4 specifically includes the following steps: Step S41: The first-level ciphertext is encrypted by the user private key as a whole to obtain the second-level ciphertext.

[0037] It should be noted that the first device private key and the user public key are both sent to the device authorized by the user for decryption of the second-level ciphertext.

[0038] Step S5: The second-level ciphertext is mapped to a set communication frequency band to obtain communication information.

[0039] In the embodiment, the modulation method for mapping the second-level ciphertext to the set communication frequency band includes at least orthogonal frequency division multiplexing, quadrature phase shift keying, or 16-quadrature amplitude modulation, without limitation. By converting the second-level ciphertext into digital communication information with strong anti-interference capability, and carrying the key information such as the identity and position of the device, the device is designed to be reliably received by the authorized device in a complex electromagnetic environment.

[0040] Step S6: Generating a target interference waveform based on the target information.

[0041] In the embodiment, the target interference waveform can be selected as a targeting narrowband interference or a blocking wideband interference according to a strategy, aiming to effectively suppress or interrupt the control and image transmission link of the target unmanned aerial vehicle.

[0042] Step S7: Orthogonal multiplexing and synthesis of the communication information and the target interference waveform in the time domain, code domain, or frequency domain to obtain a comprehensive countermeasure signal. In the embodiment, the method of orthogonally multiplexing and synthesizing the communication information and the target jamming waveform in time domain, code domain or frequency domain includes at least TDMA (Time Division Multiple Access), CDMA (Code Division Multiple Access) or FDMA (Frequency Division Multiple Access), without limitation.

[0043] The obtained comprehensive countermeasure signal realizes coexistence and isolation of the identity broadcast channel and the interference countermeasure channel in the frequency spectrum resource, thereby laying a foundation for subsequent realization of countermeasures and broadcast of identity information of the target UAV.

[0044] Step S8: transmitting the comprehensive countermeasure signal to the target UAV and broadcasting the comprehensive countermeasure signal to the surrounding airspace.

[0045] In the embodiment, the step S8 of transmitting the comprehensive countermeasure signal to the target UAV specifically includes the following steps: Step S81: adjusting the pointing direction of the antenna beam in the UAV countermeasure device according to the real-time position of the target UAV.

[0046] Step S82: transmitting the comprehensive countermeasure signal after adjusting the pointing direction of the antenna beam.

[0047] After the antenna beam is accurately pointed according to the real-time position of the target UAV, the energy of the comprehensive countermeasure signal can be concentrated on the target airspace, thereby realizing accurate and efficient electromagnetic suppression of the UAV, and the encrypted identity information can be continuously broadcast to the surrounding airspace, achieving integration of countermeasures and cooperation, thereby significantly shortening the search time of the compliant device and improving the overall management efficiency without affecting the original countermeasure performance.

[0048]

Second Embodiment

[0049] The tertiary encryption of the secondary ciphertext by the second device public key specifically includes the following steps: The secondary ciphertext is subjected to a hash value operation to obtain a second digital fingerprint, and the second digital fingerprint is encrypted by the second device public key to obtain the tertiary ciphertext.

[0050] After obtaining the tertiary ciphertext, the tertiary ciphertext is mapped to a set communication frequency band to obtain the communication information.

[0051] In the embodiment, the second device public key is different from the first device public key in the first embodiment, so that the first two levels of encryption results are finally encapsulated using the second device public key different from the first device public key, further strengthening the structural integrity of the signal and the system-level trusted authentication. In addition, since the second device public key is also globally managed by the device manufacturer, a unified identity trust cornerstone is built, and the anti-attack ability of the entire broadcast system in a complex environment is enhanced.

[0052] The ciphertext output after the above-mentioned three-layer encryption processing has dual attributes of identity authentication and permission control: the customer key ensures the "privacy" and "controllability" of the information, and the device key establishes the "authenticity" and "system trust root" of the signal, which jointly build a solid defense line against illegal decryption and signal forgery. After obtaining the three-level ciphertext, since the subsequent steps are the same as those for obtaining the two-level ciphertext in the first embodiment, they are not described here.

[0053] In summary, the information broadcast method of the unmanned aerial vehicle countermeasure device provided in the embodiment synchronously implements the dual tasks of "identity declaration" and "precise countermeasure" with a single composite signal, significantly improving the device efficiency and spectrum utilization. On this basis, the "user-manufacturer" dual-key encryption mechanism is introduced, which ensures the confidentiality and integrity of the identity information from the source level, fundamentally eliminates the risk of illegal theft and malicious forgery, and establishes a reliable identity trust cornerstone. Finally, this safe and transparent identity broadcast provides real-time and trusted management information for various collaborative users in the airspace, laying a solid foundation for building a collaborative sensing network and realizing interoperation, thereby comprehensively improving the overall management efficiency and intelligent level of low-altitude security.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent substitutions for part or all of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An information broadcasting method of a drone countermeasure device, characterized by, The method comprises: acquiring target information of a target UAV and calling an identity parameter built in itself; encapsulating the target information and the identity parameter into a broadcast information frame; performing primary encryption on the broadcast information frame through a device key to obtain first-level ciphertext, wherein the device key is provided only by a manufacturer of the UAV countermeasure device; performing secondary encryption on the first-level ciphertext through a user key to obtain second-level ciphertext, wherein the user key is provided only by a user of the UAV countermeasure device; mapping the second-level ciphertext to a set communication frequency band to obtain communication information; generating a target jamming waveform based on the target information; performing orthogonal multiplexing and synthesis on the communication information and the target jamming waveform in a time domain, a code domain or a frequency domain to obtain a comprehensive countermeasure signal; transmitting the comprehensive countermeasure signal to the target UAV and broadcasting the comprehensive countermeasure signal to a surrounding airspace. 2.The information broadcasting method of the UAV countermeasure device according to claim 1, wherein The device key comprises a first device public key and a first device private key, and the user key comprises a user public key and a user private key; performing primary encryption on the broadcast information frame through a device key to obtain first-level ciphertext; performing secondary encryption on the first-level ciphertext through a user key to obtain second-level ciphertext, specifically comprising: performing primary encryption on the broadcast information frame through a first device public key to obtain the first-level ciphertext; performing secondary encryption on the first-level ciphertext through a user private key to obtain the second-level ciphertext; The first device private key and the user public key have been transmitted to an authorized object, and the authorized object is used for supervising the UAV countermeasure device. 3.The information broadcasting method of the UAV countermeasure device according to claim 2, wherein Further comprising a second device public key and a second device private key, wherein the second device public key is different from the first device public key, and the method further comprises: performing tertiary encryption on the second-level ciphertext through the second device public key to obtain third-level ciphertext; mapping the third-level ciphertext to a set communication frequency band to obtain communication information. 4.The information broadcasting method of the drone countermeasure apparatus according to claim 1, characterized in that, The target information at least comprises a position and a communication frequency point of the target UAV. 5.The information broadcasting method of the drone countermeasure apparatus of claim 1, wherein The identity parameter at least comprises a user ID, a device ID, a device position, a device type and a time stamp of the UAV countermeasure device. 6.The information broadcasting method of the drone countermeasure apparatus of claim 1, wherein, The modulation method for mapping the second-level ciphertext to the set communication frequency band at least comprises orthogonal frequency division multiplexing, quadrature phase shift keying or 16-quadrature amplitude modulation. 7.The information broadcasting method of the drone countermeasure apparatus according to claim 1, wherein The target jamming waveform comprises a targeting narrowband jamming or a blocking wideband jamming. 8.The information broadcasting method of the drone countermeasure apparatus of claim 1, wherein, The method for performing orthogonal multiplexing and synthesis on the communication information and the target jamming waveform in a time domain, a code domain or a frequency domain at least comprises TDMA time division multiple access, CDMA code division multiple access or FDMA frequency division multiple access. 9.The information broadcasting method of the drone countermeasure apparatus of claim 1, wherein, The method for transmitting the comprehensive countermeasure signal to the target UAV comprises: adjusting a pointing direction of an antenna beam in the UAV countermeasure device according to a real-time position of the target UAV; transmitting the comprehensive countermeasure signal after adjusting the pointing direction of the antenna beam.

10. A drone countermeasure device, comprising: The information broadcasting method of the UAV countermeasure device according to any one of claims 1 to 9 countermeasures a target UAV and broadcasts a comprehensive countermeasure signal to a surrounding airspace.

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