Multi-device synchronous shielding method and related product

Abstract

A multi-device synchronous shielding method and a related product. The method comprises: determining whether an interference device is a first interference device; if the interference device is the first interference device, generating, by the interference device, an interference signal on the basis of a received base station signal; and transmitting the interference signal during an interference signal output time period, and not transmitting the interference signal during an interference signal off time period; and if the interference device is not the first interference device, acquiring, by the interference device, an interference signal off time period and an interference signal output time period on the basis of a received signal; receiving a base station signal during the interference signal off time period and generating an interference signal on the basis of the base station signal; and transmitting the interference signal during the interference signal output time period, and not transmitting the interference signal during the interference signal off time period.

Description

Multi-machine synchronous shielding methods and related products

[0001] This application claims priority to Chinese Patent Application No. 202411893601.X, filed on December 20, 2024, entitled "Multi-machine Synchronous Shielding Method and Related Products", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and more specifically, to a multi-machine synchronous shielding method, system, electronic device, storage medium, and computer program product. Background Technology

[0003] Jamming devices, such as frequency jammers, are typically used in scenarios requiring wireless signal control, such as bomb disposal, counter-terrorism, and technical reconnaissance, to protect the safety of the public environment. For large jamming areas, multiple jamming devices need to be deployed in various locations to cover the entire area. If the multiple jamming devices are activated at different times, the signal received by the later-activated jamming device may include not only the base station signal but also the interference signal emitted by the earlier-activated device. This will cause the later-activated jamming device to be unable to receive the correct base station signal, resulting in a poorer jamming effect. Summary of the Invention

[0004] Therefore, it is necessary to provide a multi-machine synchronous shielding method, system, electronic device, storage medium, and computer program product.

[0005] A multi-machine synchronous shielding method, the multi-machine synchronous shielding method comprising:

[0006] Determine whether the jamming device is the first jamming device, wherein the first jamming device is the first jamming device to transmit the jamming signal;

[0007] When the jamming device is determined to be the first jamming device, the following steps are performed:

[0008] The jamming device receives base station signals and generates jamming signals based on the received base station signals;

[0009] The interference signal is transmitted during the period when the interference signal is output, and the interference signal is not transmitted during the period when the interference signal is turned off.

[0010] If it is determined that the jamming device is not the first jamming device, the following steps are performed:

[0011] The jamming device obtains the jamming signal off time period and the jamming signal output time period based on the received signal;

[0012] During the period when the interference signal is turned off, the base station signal is received to generate the interference signal based on the base station signal;

[0013] The interference signal is transmitted during the period when the interference signal is output, and the interference signal is not transmitted during the period when the interference signal is turned off.

[0014] A multi-machine shielding system includes: multiple jamming devices;

[0015] When any of the aforementioned interference devices is determined to be the first interference device, the following steps are performed:

[0016] The jamming device receives base station signals and generates jamming signals based on the base station signals;

[0017] The interference signal is transmitted during the period when the interference signal is output, and the interference signal is not transmitted during the period when the interference signal is turned off.

[0018] If any of the aforementioned jamming devices is determined not to be the first jamming device, the following steps are performed:

[0019] The jamming device obtains the jamming signal off time period and the jamming signal output time period based on the received signal;

[0020] During the period when the interference signal is turned off, the base station signal is received to generate the interference signal based on the base station signal;

[0021] The interference signal is transmitted during the period when the interference signal is output, and the interference signal is not transmitted during the period when the interference signal is turned off.

[0022] An electronic device includes a memory and a processor; the memory is used to store a computer program; the processor is used to execute the computer program to implement the multi-machine synchronization shielding method described above.

[0023] A computer storage medium storing a computer program, which, when executed by a processor, implements the multi-machine synchronization masking method described above.

[0024] A computer program product includes a computer program; the computer program is executed by a processor to implement the steps in the multi-machine synchronization masking method described above.

[0025] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of the invention will become apparent from the specification, drawings, and claims. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0027] Figure 1 is a flowchart of an embodiment of a multi-machine synchronous shielding method according to the present invention;

[0028] Figure 2 is a schematic diagram of the working timing of the interference device after it is turned on to interfere in one embodiment of a multi-machine synchronous shielding method of the present invention.

[0029] Figure 3 is a schematic diagram of the working timing of the first interference device in an embodiment of a multi-machine synchronous shielding method of the present invention;

[0030] Figure 4 is a schematic diagram of the working timing of the non-first interfering device and the first interfering device in an embodiment of the multi-machine synchronous shielding method of the present invention.

[0031] Figure 5 is a flowchart of an embodiment of step S1 in the embodiment shown in Figure 1;

[0032] Figure 6 is a flowchart of an embodiment of the specific implementation of step S11 in the embodiment shown in Figure 5.

[0033] Figure 7 is a flowchart of an embodiment of step S11b in the embodiment shown in Figure 6;

[0034] Figure 8 is a schematic diagram of the first frequency band signal obtained by the network-entering interference device;

[0035] Figure 9 is a flowchart of an embodiment of the embodiment shown in Figure 6, which includes a specific implementation of step S11a.

[0036] Figure 10 is a flowchart of another embodiment of the specific implementation of step S11a in the embodiment shown in Figure 6.

[0037] Figure 11 is a flowchart of another embodiment of a multi-machine synchronous shielding method of the present invention;

[0038] Figure 12 is a schematic diagram of the working timing of another embodiment of the first interference device of the present invention. Detailed Implementation

[0039] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0040] 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 pertains. The terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," just as "comprising" is interpreted as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0042] Figure 1 illustrates a first embodiment of a multi-device synchronous shielding method proposed in this invention. In this first embodiment, the method includes: S1, determining whether the interfering device is the first interfering device, where the first interfering device is the first device to transmit an interfering signal. S2, if the interfering device is determined to be the first interfering device, proceeding to steps S21 and S22; S3, if the interfering device is not determined to be the first interfering device, proceeding to steps S31, S32, and S33. Specifically, the steps include: S21, the interfering device receives a base station signal and generates an interfering signal based on the received base station signal; S22, transmitting an interfering signal during the interfering signal output period and not transmitting an interfering signal during the interfering signal shutdown period; and S31, the interfering device obtains the interfering signal shutdown period and the interfering signal output period based on the received signal; S32, receiving a base station signal during the interfering signal shutdown period to generate an interfering signal based on the base station signal; and S33, transmitting an interfering signal during the interfering signal output period and not transmitting an interfering signal during the interfering signal shutdown period.

[0043] In embodiments of the present invention, the above method can be executed using an interference device (such as a frequency jammer) or a signal jamming module (which can perform signal jamming and can be installed on other types of equipment). The interference device or signal jamming module can be an existing hardware device that has undergone software modification and upgrade to implement the above method. Alternatively, the above method can also be implemented by controlling an existing interference device or interference module through a computer or other host computer device. The following description uses an interference device as an example to explain the multi-machine synchronous shielding method proposed in the embodiments of this application.

[0044] In this system, the jamming device generates a corresponding interference signal based on the received base station signal. This interference signal disrupts user terminals such as mobile phones, preventing them from communicating with the base station and thus shielding them. The effectiveness of the jamming depends directly on whether the actual base station signal is received. In some areas, when multiple jamming devices are needed to simultaneously shield mobile phones and other user terminals, each device must perform the same operation. However, to ensure all jamming devices correctly receive the actual base station signal from the base station in the environment, they need to synchronize before jamming. In this embodiment, the purpose of multi-device synchronization is to ensure all jamming devices receive the base station signal at a specific time; that is, at a specific time, all devices stop jamming and simultaneously receive the base station signal. Therefore, the above process can achieve synchronized operation of multiple jamming devices.

[0045] Based on step S1 above, before the jamming device starts generating the jamming signal, it is first determined whether the jamming device is the first jamming device. Specifically, before jamming, the jamming device needs to synchronize with the corresponding base station (to ensure the timing of the jamming signal matches the base station, thus achieving the jamming effect). After synchronization is complete, jamming can begin. In this embodiment, the first jamming device is the one that first transmits the jamming signal. If other jamming devices have already synchronized with the corresponding base station and started jamming before this first jamming device, then this first jamming device is not defined as the first jamming device in this jamming process. The jamming device can determine whether it is the first jamming device by communicating with other jamming devices to determine if any jamming devices have started jamming, or by determining whether a jamming signal already exists in the current environment, etc. This embodiment does not limit the scope of this determination.

[0046] Based on step S2, when the current jamming device is determined to be the first jamming device, the jamming device can generate an interference signal based on the received base station signal. This interference signal is used to interfere with the user terminal. For example, the timing of the interference signal is consistent with the base station signal, and the specific content filled in is a random code. The specific method of the interference signal can be referred to in existing technology, and this embodiment does not impose any limitations. Then, interference can begin. The specific interference scheme is to output or shut down the interference signal at different time periods. For example, the interference signal output time period and the interference signal shutdown time period are obtained. The jamming device outputs the interference signal during the interference signal output time period and does not transmit the interference signal during the interference signal shutdown time period. An interference signal output time period and an interference signal shutdown time period can constitute an interference cycle. The jamming device can cyclically execute this interference cycle to achieve interference. The interference signal output time period and the interference signal shutdown time period can be pre-set and stored in each jamming device, or they can be generated in real time by a corresponding algorithm after the jamming device is powered on, or they can be set by the operator through an interactive module, or they can be sent by a control terminal. This embodiment of the application does not limit these aspects. It should be noted that regardless of whether it is the first jamming device or not, once jamming is started, the above jamming cycle will be executed repeatedly.

[0047] In one embodiment, Figure 2 illustrates a timing diagram of a jamming device performing jamming, comprising one jamming signal output period and two jamming signal off periods. Here, TX represents the jamming device in the state of transmitting a jamming signal, i.e., T1 represents the jamming signal output period; RX represents the jamming device not transmitting a jamming signal, i.e., T2 represents the jamming signal off period. For example, the duration of a single jamming signal output period can be set to 1000ms, and the duration of a single jamming signal off period can be set to 24ms. Therefore, after the jamming device is activated, it can continuously transmit a jamming signal for 1000ms, then stop transmitting the jamming signal for 24ms, then continue transmitting the jamming signal for another 1000ms, and so on, cycling through each jamming cycle. All jamming devices, once jamming is activated, will transmit a jamming signal during the same time period (i.e., the jamming signal output period) and will not transmit a jamming signal during the same time period (i.e., the jamming signal off period).

[0048] Based on step S3, when it is determined that the current interfering device is not the first interfering device (hereinafter referred to as "later-entry interfering device"), it can be understood that other interfering devices have already started interfering, that is, they have begun to cyclically execute the aforementioned interfering cycle. At this time, the later-entry interfering device can obtain the interfering signal shutdown time period and interfering signal output time period of other interfering devices based on the received signals. Since the interfering devices that have started interfering are already cyclically executing the aforementioned interfering cycle, the current interfering device can analyze the pattern of interfering signals sent by other interfering devices through the received signals, thereby extracting the interfering signal shutdown time period and the interfering signal output time period. It should be noted that in the application scenario of synchronous shielding of multiple interfering devices, all interfering devices are usually intended to interfere with the same area, such as a prison or school building. Therefore, all interfering devices usually receive base station signals from the same base station, that is, each interfering device generates interfering signals based on the same base station signal, that is, the interfering signals adopted by each interfering device are consistent. Therefore, each interfering device can identify which are interfering signals and which are base station signals. Therefore, late-entry jamming devices can determine the patterns of interference signal output and shutdown periods by identifying which time periods receive signals with interference and which receive signals without interference. This pattern defines the duration of each of the two time periods within an interference cycle. After determining the interference signal shutdown and output periods, the late-entry jamming device can receive base station signals during the interference signal shutdown periods in one or more subsequent interference cycles. It then generates interference signals based on the received base station signals and begins cyclically executing each interference cycle: transmitting interference signals during the interference signal output periods and ceasing transmission during the interference signal shutdown periods, repeating this cycle continuously.

[0049] Since there are no interference signals in the environment during the interference signal shutdown period, the late-entry interference device can generate interference signals based on the real base station signals and will not be affected by interference signals emitted by other interference devices, which helps to improve the interference effect of the late-entry interference device.

[0050] For non-first interfering devices, because interference signals emitted by other interfering devices already exist in the area, they cannot receive base station signals at any time like the first interfering device. Instead, they need to obtain the interference signal shutdown period and interference signal output period from the interference signals sent by other interfering devices, and then generate their own interference signals based on the base station signals received during the interference signal shutdown period. Furthermore, to avoid affecting subsequent interfering devices joining the network, all interfering devices joining the network (meaning they have already synchronized with the base station) must follow the same interference signal shutdown and output periods after activating interference. That is, during the interference signal shutdown period, all new interfering devices stop transmitting interference signals to ensure that subsequent interfering devices can obtain genuine base station signals during this period.

[0051] The multi-device synchronization shielding method provided in this embodiment allows all jamming devices to receive accurate and genuine base station signals during any jamming signal shutdown period after other jamming devices have started jamming, without being interfered with by jamming signals emitted by other jamming devices. This achieves the effect that multiple jamming devices can accurately synchronize with the base station even if they are not started simultaneously.

[0052] As shown in Figure 5, in one embodiment, step S1, namely determining whether the interfering device is the first interfering device, includes: S11, determining whether the interfering device receives an interfering signal; S12, if the interfering device receives an interfering signal, then determining that the interfering device is not the first interfering device; S13, if the interfering device does not receive an interfering signal, then determining that the interfering device is the first interfering device.

[0053] Specifically, whether a jamming device is the first to receive a jamming signal can be determined by whether that device receives the jamming signal. Understandably, if a jamming device is not the first, it will eventually receive jamming signals from other jamming devices given a sufficient amount of time to receive the signal. Conversely, if a jamming device does not receive any jamming signals from other jamming devices, it is considered the first. Therefore, a jamming device can determine that it is not the first if it receives a jamming signal, and otherwise, it can determine that it is the first. Since the jamming signal is generated based on base station information and preset rules, its specific content may differ from the base station signal. Therefore, a jamming device can determine whether it has received a jamming signal by detecting the presence of specific signal characteristics in the received signal that the jamming signal possesses but the base station signal does not. Specifically, if the jamming device detects specific signal characteristics in the received signal, it can determine that it has received a jamming signal; if it does not detect these specific signal characteristics, it can determine that it has not received a jamming signal. The specific signal feature of the interference signal can be some detectable signal features that do not affect the interference effect. For example, the specific signal feature can be the specific content of the interference signal (such as a random sequence that changes according to a set rule). This embodiment does not limit this.

[0054] As shown in Figure 6, based on the above, the following steps can be used to determine whether the interfering device has received an interfering signal. Step S11 specifically includes: S11a, acquiring the first frequency band signal corresponding to all operating frequency bands of the interfering device, wherein the acquisition duration of each operating frequency band signal in the first frequency band signal is greater than or equal to the sum of the duration of the interfering signal off period and the interfering signal output period. S11b, determining whether the interfering device has received an interfering signal based on the first frequency band signal.

[0055] By setting the operating state of the jamming device to receive jamming signals from all operating frequency bands, and allowing the jamming device to receive external signals from the environment for a certain period of time, the jamming signal is identified from the external signals. Each operating frequency band is the same as a communication frequency band (e.g., the B1 band in FDD-LTE technology) that appears in the jamming location; that is, jamming signals from that operating frequency band can interfere with signals from that communication frequency band. Since all operating frequency bands are the same as all communication frequency bands that appear in the jamming location, jamming signals from all operating frequency bands can interfere with signals from all communication frequency bands appearing in the jamming location. In this embodiment, step S11a can be achieved by setting the center frequency and bandwidth of the signal received by the receiving antenna of the jamming device, thereby switching the frequency band of the signal received by the receiving antenna to sequentially occupy different operating frequency bands of the jamming device. The first frequency band signal can be the signal receiving jamming signals from all operating frequency bands for a set duration, and for each operating frequency band, the duration of the received signal is at least greater than the duration of one jamming cycle.

[0056] It is understandable that the signal components in the first frequency band signal acquired by the first interfering device and those acquired by non-first interfering devices are different. The first frequency band signal acquired by the first interfering device never contains any interfering signal, but only the base station signal. However, in the first frequency band signal acquired by non-first interfering devices, at least one frequency band will contain both the interfering signal and the base station signal of the corresponding frequency band for at least a portion of the duration. Therefore, step S11b can be used to determine whether the interfering device has received an interfering signal.

[0057] For each operating frequency band, the duration of the received signal must be set long enough to ensure that it is greater than or equal to the duration of one interference cycle (the sum of the duration of the interference signal off period and the duration of the interference signal output period), so as to ensure that the interference devices entering the network later can identify the interference signal output period and the interference signal off period.

[0058] In one embodiment, as shown in Figure 7, step S11b above, which determines whether the interfering device has received an interfering signal based on the first frequency band signal, includes: S11b1, obtaining the characteristics of the synchronization signal in the first frequency band signal; S11b2, determining that the interfering device has received an interfering signal when the characteristics of the synchronization signal are a first preset characteristic; and S11b3, determining that the interfering device has not received an interfering signal when the characteristics of the synchronization signal are not the first preset characteristic. The execution order of S11b2 and S11b3 is not limited; for example, they can be performed simultaneously or sequentially.

[0059] In this embodiment, the interference signal may also include a synchronization signal. The synchronization signal in the interference signal can affect the user terminal's interpretation of the synchronization signal in the base station signal, thereby interfering with the user terminal's communication. The synchronization signal in the interference signal can be configured to have the same content as the synchronization signal in the base station signal, but with a different period. For example, the period of the synchronization signal in the interference signal is shorter than the period of the synchronization signal in the base station signal. Therefore, the period of the synchronization signal in the interference signal is the first preset feature, and the synchronization signal in the interference signal will be referred to as the synchronization interference signal below.

[0060] The jamming device can extract the synchronization signal from the acquired first frequency band signal to determine whether the received signal contains interference. In this scheme, the first frequency band signal received by the first jamming device and non-first jamming devices may include different signals in different time periods. For example, the signal received by a non-first jamming device during the interference signal output period may include the synchronization signal (PSS signal or SSS signal) and synchronization interference signal (such as PSS interference signal or SSS interference signal, where the PSS interference signal is used to affect the user terminal's interpretation of the PSS signal, and its content is the same as the PSS signal, but its period is different; the SSS interference signal is used to affect the user terminal's interpretation of the SSS signal, and its content is the same as the SSS signal, but its period is different). The signal received during the interference signal off period only includes the synchronization signal (PSS signal or SSS signal) from the base station signal. However, if the reception duration of each operating frequency band is greater than one interference period, it can be guaranteed that all interference signals emitted by other jamming devices during the interference signal output phase will be received, thus enabling the identification of the current jamming device as a non-first jamming device by recognizing the synchronization interference signal. It is understandable that the first jamming device receives the first frequency band signal, which only includes the synchronization signal (PSS signal or SSS signal) from the base station signal. Therefore, since there is no jamming signal in the signal received by the first jamming device, it can be identified as the first jamming device.

[0061] In one specific embodiment, the synchronization signal is characterized by a period, and the synchronization signal is a PSS signal. The period of the PSS signal is extracted, and it is determined whether the extracted period is consistent with the period of the PSS interference signal. Based on the determination result, it is determined whether the first frequency band signal contains an interference signal. In one specific embodiment, when no interference device is activated, the first frequency band signal in the environment consists only of the base station signal. At this time, the period of the PSS signal in the base station signal is 5ms. When an interference device is activated, both the PSS interference signal and the base station's PSS signal exist in the environment. The period of the PSS interference signal is a pre-set period different from 5ms, for example, 66.667us. Therefore, in this embodiment, the existence of a PSS signal with a period of 66.667us can be determined by analyzing the first frequency band signal (e.g., I / Q data captured in 1.05s from each operating frequency band). If it exists, it can be determined that an interference signal already exists in the environment; otherwise, it can be determined that no interference signal exists in the environment. In one embodiment, the interference signal can also be identified by other feature information, such as signal amplitude or signal phase, or a combination of the above feature information, depending on the specific implementation method of the interference signal. The acquisition duration of the first frequency band signal can include at least a cycle consisting of a complete period of interference signal output and a period of interference signal shutdown.

[0062] In another optional embodiment, when the synchronization signal is an SSS signal, the interference signal corresponds to an SSS interference signal. The implementation of the above steps S11b1, S11b2, and S11b3 can refer to the embodiment when the synchronization signal is a PSS signal, and will not be repeated here.

[0063] Figure 8 illustrates the timing diagram of data received by the jamming device. The following explanation, using Figure 8 as a case study, details how a non-first jamming device identifies itself as such and obtains the jamming signal shutdown and output periods based on the received signal. In the embodiment shown in Figure 8, the jamming signal output period is 1000ms (1 second), the jamming signal shutdown period is 24ms, and the acquisition duration for each operating frequency band in the first frequency band signal is 1.05s. If the jamming device is not the first jamming device, the 1.05s captured by it will contain at least one 1s jamming signal output period and two 24ms jamming signal shutdown periods. Therefore, by judging the characteristics of the synchronization signal within 1.05s, it is possible to determine which times within 1.05s belong to the 1s jamming signal output period and which belong to the 24ms jamming signal shutdown period. Here, we will use the periodicity of the synchronization signal, assuming it is a PSS signal, as an example to explain the identification principle of each time period in Figure 8. By analyzing the period of the PSS signal within 1.05 seconds, the jamming device determined that the PSS signal period was 66.667µs in the initial T1 (500ms) time period, 5ms in the middle T2 (24ms) time period, and again 66.667ms in the subsequent T3 (526ms) time period. This indicates that interference signals were received during T1 and T3, thus falling within the interference signal output periods. Therefore, it can be determined that this jamming device is not the first one. During the T2 time period, no interference signals were received, only the base station signal was received; therefore, this is the interference signal shutdown period. Based on the known duration of an interference cycle, including the duration of the interference signal output period (1000ms) and the duration of the interference signal deactivation period (24ms), it can be calculated that the interference signal output period of the already-activated interference device has 474ms remaining (i.e., it still needs to go through the T4 period). The next interference signal deactivation period will occur between T5 (1.524s and 1.548s). Therefore, by capturing data during the T5 period, the interference device can obtain base station signals without interference signals and achieve synchronization with the base station.

[0064] It is understandable that when the jamming device is the first jamming device, even if the captured 1.05s includes a 1s jamming signal output period and two 24ms jamming signal shutdown periods, it cannot identify the presence of a jamming signal because there is currently no jamming signal in the environment. Thus, it can be confirmed that it is the first jamming device.

[0065] In one embodiment, as shown in FIG9, step S11a above, namely acquiring the first frequency band signal corresponding to all operating frequency bands of the jamming device, includes: S11a1, if the jamming device includes one receiving channel and multiple transmitting channels, and the frequency band corresponding to each transmitting channel is the same as a working frequency band, for the frequency band corresponding to each transmitting channel, the first sub-frequency band signal of a first preset duration is acquired sequentially through the receiving channel. All the first sub-frequency band signals constitute the first frequency band signal.

[0066] In this embodiment, all jamming devices operate on the same frequency band, which is also the same as the transmission channel's frequency band. If a jamming device has only one receiving channel but multiple transmission channels (i.e., multiple operating frequency bands), the receiving channel's receiving frequency band can be switched to match the frequency bands of different transmission channels sequentially at different time periods, thus allowing the jamming signals corresponding to each operating frequency band to be received sequentially. When the receiving channel corresponds to the frequency band of a certain transmission channel, if a jamming device is already transmitting jamming signals in that transmission channel's frequency band, the receiving channel can receive the jamming signals transmitted by the activated jamming device in that transmission channel's frequency band, and based on this, it can determine that it is not the first jamming device. Because a jamming device has one receiving channel and multiple transmitting channels, and the transmitting channels used by a jamming device that has already started jamming are selected according to the actual jamming scenario, the transmitting channels used will also be different in different jamming scenarios. For example, a jamming device that has already started jamming may only have one transmitting channel working, or it may have all transmitting channels working. However, this is unknown to jamming devices that start jamming later. Therefore, the jamming device needs to spend a certain number of first preset durations (such as 1.05 seconds) to capture the signal (i.e., the first sub-band signal) from each transmitting channel. Combining all the captured first sub-band signals can obtain the full-band signal, which is the first band signal. After acquiring the first band signal, it can identify whether a jamming signal has been received, thereby determining whether it is the first jamming device.

[0067] The types of signals included in the first sub-band signal can vary: if the current interfering device is the first interfering device, then the first sub-band signal received in any operating frequency band will only contain base station signals and no interfering signals; if the current interfering device is not the first interfering device, then the first sub-band signal of the corresponding operating frequency band, if received during the period when the interfering signal is output, will contain both the interfering signals output by other interfering devices and the base station signals; if received during the period when the interfering signal is turned off, it will only contain the base station signals.

[0068] In one embodiment, as shown in FIG10, step S11a above, namely, obtaining the first frequency band signal corresponding to all operating frequency bands of the jamming device, further includes: S11a2, if the jamming device includes M receiving channels and M transmitting channels, and M>1, and the frequency band corresponding to each transmitting channel is the same as a working frequency band, obtaining the second sub-frequency band signal received by all receiving channels within a first preset time period, and all the second sub-frequency band signals constitute the first frequency band signal.

[0069] In this embodiment, the frequency bands of the multiple receiving channels are identical to the frequency bands of the multiple transmitting channels on a one-to-one basis; that is, each transmitting channel has a corresponding receiving channel. If interference is enabled, all transmitting channels will simultaneously transmit interference signals, and signals can be received simultaneously through all receiving channels. Therefore, each receiving channel can obtain a second sub-band signal. All the second sub-band signals can form a full-band signal (i.e., a first-band signal).

[0070] Thus, since all receiving channels can simultaneously receive signals from their respective frequency bands, the full-band signal can be obtained by utilizing a first preset duration (e.g., 1.05s), which helps save the acquisition time of the first frequency band signal and improves the timeliness of interference detection.

[0071] In other embodiments, if the jamming device is equipped with multiple receiving channels and multiple transmitting channels, the correspondence between the transmitting channels can be that the frequency bands of the multiple receiving channels are the same one-to-one with the frequency bands of the multiple transmitting channels, or the frequency band of one receiving channel can cover at least the frequency bands of two transmitting channels, or the frequency bands of at least two receiving channels can cover the frequency band of one transmitting channel, and there is no limitation on this.

[0072] It should be noted that there is no restriction on the execution order of the above steps S11a1 and S11a2. For example, the two steps can be executed simultaneously or sequentially.

[0073] Optionally, the process of receiving base station signals by the jamming device in step S21 above may specifically include: acquiring base station signals corresponding to all operating frequency bands of the jamming device.

[0074] Because shielding the terminal must ensure that the terminal cannot receive any base station signals, the jamming device, after identifying itself as the first jamming device, must receive base station signals from all operating frequency bands and generate corresponding jamming signals based on the received base station signals from all operating frequency bands.

[0075] In one optional embodiment, all operating frequency bands of the jamming device are capable of covering at least the frequency bands of all base station signals in the jamming location. The correspondence between each operating frequency band and each base station frequency band is not limited in this embodiment. For example, all operating frequency bands of the jamming device can correspond one-to-one with the frequency bands of all base station signals (i.e., one operating frequency band corresponds to one base station signal frequency band), or one-to-many (i.e., one operating frequency band can cover the frequency bands of multiple base station signals), or many-to-one (i.e., multiple operating frequency bands cover the frequency band of one base station signal).

[0076] Optionally, when it is determined that the interfering device is not the first interfering device, the above step S32, namely receiving base station signals during the interfering signal shutdown period to generate an interfering signal based on the base station signals, may specifically include: receiving base station signals corresponding to each operating frequency band of the interfering device during different interfering signal shutdown periods; and generating an interfering signal based on the received base station signals.

[0077] Even after confirming that it is not the first interfering device, a non-first interfering device still needs to receive base station signals from all operating frequency bands. However, since other interfering devices have already started interfering, it cannot randomly receive base station signals; it can only receive base station signals from each operating frequency band during the interfering signal shutdown period. Because the duration of the interfering signal shutdown period is short, the amount of base station signal data obtained during this period may not be sufficient to support the interference. Therefore, in this embodiment, base station signals from relevant frequency bands can be received sequentially during the interfering signal shutdown periods in multiple interference cycles. Specifically, it is possible to obtain only the base station signal corresponding to one operating frequency band during one interfering signal shutdown period; or, it is possible to obtain base station signals from two or more operating frequency bands during one interfering signal shutdown period; or, it is possible to receive the base station signal of one operating frequency band during two or more interfering signal shutdown periods. In general, as long as base station signals from all operating frequency bands can be received, this embodiment does not impose a specific limitation on the number of interfering signal shutdown periods used for reception.

[0078] The following describes the complete operating timing of the first jamming device after power-on, using the embodiment shown in Figure 3. PAOFF indicates the stage where the jamming device stops transmitting jamming signals (during which it can receive base station signals). PAON indicates that the jamming device transmits jamming signals. In the few seconds after power-on, the jamming device can first acquire 1.05 seconds of signal for each operating frequency band through the receiving channel (if the specific configuration of the number of channels is as described in step S11a1 above, then 1.05 seconds of the first sub-band signal for each operating frequency band is acquired sequentially; if the specific configuration of the number of channels is as described in step S11a2 above, then the second sub-band signals for all operating frequency bands are acquired within 1.05 seconds), i.e., the first frequency band signal. Specifically, the first frequency band signal can be I / Q data obtained by IQ demodulating the received radio frequency signal. Therefore, the presence of a jamming signal can be determined based on the I / Q data. Since it is the first jamming device, there is currently no jamming signal in the environment, thus confirming itself as the first jamming device. Next, the base station signal for each operating frequency band can be further acquired. Specifically, the base station signal can also be I / Q data obtained by IQ demodulating the received radio frequency signal. Analyzing the captured IQ data yields the base station information for each base station. Once the base station information is obtained, interference signals can be generated based on it. Next, interference is activated by switching to the PA ON position. The first interference device initially enters the interference signal output period, continuously transmitting interference signals for 1000ms, then enters the interference signal deactivation period, ceasing transmission for 24ms, before resuming the interference signal output period. This process repeats continuously throughout the interference cycle.

[0079] The following example, shown in Figure 4, illustrates the operating timing of a non-first interfering device. Since it is not the first interfering device, other interfering devices in the surrounding environment are already executing interference cycles, including the first interfering device. For this non-first interfering device, the first step is to acquire 1.05 seconds of signal for each operating frequency band, i.e., the first frequency band signal mentioned above. The specific acquisition method is the same as that for the first interfering device, and will not be repeated here. Since other interfering devices are already executing interference cycles, interference signals can be identified from the first frequency band signal, thus determining that it is not the first interfering device. Simultaneously, based on the first frequency band signal, the interference signal output time period and interference signal shutdown time period are identified, and the interference signal shutdown time periods that other interfering devices will execute next are calculated. Then, during each subsequent interference signal shutdown time period, the corresponding base station signal is received until all base station signals for all operating frequency bands are received. Afterward, interference signals can be generated based on the received base station signals, and it begins to execute each interference cycle cyclically like other interfering devices (i.e., transmitting interference signals during the interference signal output time period and stopping transmitting interference signals during the interference signal shutdown time period). In order not to affect subsequent interference devices joining the network, all interference devices joining the network need to stop transmitting interference signals during the same interference signal shutdown period and transmit interference signals during the same interference signal output period. This is to ensure that interference devices joining later can obtain accurate and true base station signals during the interference signal shutdown period.

[0080] Therefore, this embodiment, through the above method, allows all subsequently activated jamming devices to receive base station signals during the jamming signal shutdown period, without being interfered with by jamming signals emitted by other jamming devices, so that even if multiple jamming devices are not activated at the same time, they can eventually work synchronously.

[0081] In one embodiment, as shown in FIG11, after determining that the interfering device is the first interfering device, and after the interfering device receives the base station signal and generates an interfering signal based on the base station signal, for example, between steps S21 and S22, the following steps are further performed: S23, receiving the signal in the environment again, and determining whether there is an interfering signal in the environment based on the signal in the environment. S24, if there is an interfering signal in the environment, determining that the interfering device is not the first interfering device, and performing the subsequent steps of the method for determining that the interfering device is not the first device (i.e., starting to execute the above steps S31, S32, and S33). S25, if there is no interfering signal in the environment, determining that the interfering device is the first device, and continuing to execute the above step S22, i.e., transmitting the interfering signal during the interfering signal output period and not transmitting the interfering signal during the interfering signal shutdown period. The execution order of steps S24 and S25 is not limited; for example, they can be executed simultaneously or sequentially.

[0082] Specifically, in practical applications, a unique competition conflict phenomenon exists: if two newly joined jamming devices are turned on almost simultaneously (although there is actually a slight time difference between their activation and deactivation), both devices will execute step S1 almost simultaneously. Whether it's the first jamming device or the later-activated one (hereinafter referred to as the "pseudo-first jamming device"), after activation, both devices capture data for a period of time, such as 1.05 seconds (i.e., the first frequency band signal), to determine the presence of a jamming signal. Neither device currently receives a jamming signal, so after executing step S1, both will consider themselves the first jamming device. However, there is a time gap between executing step S1 and the device outputting its jamming signal, such as time needed to generate the jamming signal. Therefore, a situation may arise where, while the pseudo-first jamming device is still generating its jamming signal, the real first jamming device has already started transmitting its jamming signal. However, the pseudo-first jamming device still considers itself the first jamming device and, after generating its jamming signal, will still begin its jamming cycle slightly later than the real jamming device. Since the two jamming devices start executing their jamming cycles at different times, it will affect the output and shutdown time periods of the jamming signals identified by the subsequently activated jamming devices. This means that it is impossible for all jamming devices to achieve synchronization. Therefore, it is necessary to compete to determine which is the true first jamming device to avoid the above problems.

[0083] Taking two jamming devices, A and B, with jamming device B being the true first jamming device and jamming device A being the pseudo first jamming device as an example, when jamming device A is receiving signals from the environment (i.e., when executing step S1), jamming device B has not yet output a jamming signal. At this time, jamming device A will determine itself to be the first jamming device. However, while jamming device A is generating a jamming signal, jamming device B has already started transmitting a jamming signal. If jamming device A still starts working as the first jamming device, jamming device A and jamming device B will experience asynchronous competition and overlapping jamming signal shutdown periods.

[0084] Therefore, when the jamming device initially determines that it is the first jamming device, this embodiment of the invention allows the jamming device to reconfirm the signals in the environment after generating the jamming signal and before outputting the jamming signal, in order to determine whether there is a jamming signal in the environment. If the determination result is that there is already a jamming signal in the environment, it means that the current jamming device has failed to compete, that is, it means that another jamming device has already emitted a jamming signal, which means that the jamming device is actually the latter of two jamming devices that start almost simultaneously. Therefore, the jamming device is no longer the first jamming device, and will proceed according to the process for not being the first jamming device, that is, according to steps S31, S32, and S33. If the determination result is that there is still no jamming signal in the environment, it means that the current jamming device has succeeded in competing, that is, it means that no other jamming device has emitted a jamming signal before it, which means that the jamming device is actually the former of two devices that start almost simultaneously. This indicates that the jamming device is indeed the first jamming device, so step S22 can be executed directly.

[0085] Based on the above, after receiving signals from the environment again, the multi-machine synchronous shielding method also includes: transmitting interference signals during the interference signal output period.

[0086] That is, before reconfirming the presence of interference signals, the interference signal obtained in step 21 can be transmitted directly after receiving signals from the environment again, without waiting for the analysis results of step S23, and interference can be activated directly. For example, the step of "transmitting the interference signal obtained in step 21" can be executed simultaneously with the step of "determining whether there is interference signal in the environment based on signals in the environment" in step S23. Alternatively, the step of "transmitting the interference signal obtained in step 21" can be executed first, and then the step of "determining whether there is interference signal in the environment based on signals in the environment" in step S23 can be executed.

[0087] It should be noted that since the first jamming device is also in the jamming signal output period at this time, even if the pseudo-first jamming device directly emits a jamming signal, it will not have any impact. Furthermore, for the true first jamming device, since it can immediately start jamming after generating the jamming signal (without waiting for the judgment result of step S23), it can ensure that it enters the jamming state as quickly as possible. This improves the jamming response speed and ensures that subsequent jamming devices (including the pseudo-first jamming device) can receive the jamming signal in a timely manner, accurately confirming that a first jamming device has started jamming, thereby further reducing contention. After obtaining the analysis results, corresponding operations are performed based on the analysis results. For example, if the presence of a jamming signal is detected based on the environmental signal, indicating that the jamming device is not the first jamming device, the jamming signal output can be terminated, and steps S31, S32, and S33 can be re-executed to synchronize with the first jamming device.

[0088] Optionally, the step S23 above, which determines whether there is an interference signal in the environment based on the signals in the environment, may specifically include: acquiring a second frequency band signal corresponding to all operating frequency bands of the interference device; if it is determined that the second frequency band signal contains an interference signal, then it is determined that there is an interference signal in the environment; if it is determined that the second frequency band signal does not contain an interference signal, then it is determined that there is no interference signal in the environment.

[0089] That is, during the confirmation process of whether it is the true first jamming device, the second frequency band signals corresponding to all operating frequency bands of the jamming device can be obtained. This is because, during the confirmation process, for two jamming devices that are turned on almost simultaneously, the jamming device does not know which operating frequency band the true first jamming device is using. However, since the operating frequency bands of each jamming device are the same, this embodiment of the invention allows the jamming device to obtain the second frequency band signals of all operating frequency bands during the secondary confirmation process. This enables the pseudo-first jamming device to use the signals of all operating frequency bands for the secondary confirmation process, avoiding the risk of incorrect secondary confirmation results due to missing operating frequency bands, and improving the accuracy of the secondary confirmation of whether it is the first jamming device.

[0090] Furthermore, the duration of each operating frequency band signal in the second frequency band is greater than the duration of the interference signal shutdown period, and the duration of the second frequency band signal is less than the duration of the first frequency band signal.

[0091] Specifically, since the acquisition of the second frequency band signal is only used to determine the presence of interference signals, a longer sampling time is not required. Unlike the acquisition duration of the first frequency band signal, it does not need to be at least equal to the sum of the interference signal output time and the interference signal shutdown time. Although in a race condition, two interfering devices may start almost simultaneously, the timing of the pseudo-first interfering device acquiring the second frequency band signal may fall within the interference signal shutdown time of the real first interfering device. If this risk occurs, the pseudo-first interfering device may mistakenly identify itself as the first interfering device, leading to failure in avoiding the race condition. To address this, this embodiment of the invention sets the acquisition duration of the second frequency band signal to be at least equal to or greater than the duration of the interference signal shutdown time. For example, if the acquisition duration of each operating frequency band signal in the first frequency band is 1.05s and the interference signal shutdown time is 24ms, then the acquisition duration of each operating frequency band signal in the second frequency band can be 30ms. In step S23, 30ms of data can be captured from each operating frequency band of the jamming device through its receiving channel. Based on this 30ms data, the presence of interference signals can be analyzed. The method for identifying interference signals based on the second frequency band signal can refer to the analysis method for the first frequency band signal described above. For example, the specific judgment process can be: determine whether the period of the PSS signal in the second frequency band signal is 66.667µs. Thus, the second frequency band signal acquired by the pseudo-first jamming device will inevitably include interference signals, thereby avoiding the problem of failed contention hazard avoidance due to the pseudo-first jamming device acquiring the second frequency band signal during the interference signal shutdown period of the first jamming device, and improving the success rate of contention hazard avoidance.

[0092] Referring to Figure 12, the entire workflow of the first jamming device undergoing two confirmations will be explained. The jamming device first acquires the first band signal from all operating frequency bands, where each operating frequency band signal can be at least 1.05 seconds of IQ data. The first band signal is identified; since no other jamming devices are emitting interference signals in the environment, the device is determined to be the first jamming device. Next, it continues to acquire base station signals from each operating frequency band and then generates interference signals based on these base station signals. Then, a second confirmation is performed, i.e., acquiring the second band signal from all operating frequency bands again. The overall acquisition time for the second band signal is shorter than that for the first band signal, to re-identify whether there are any interference signals in the current environment. If not, it means there is no contention or conflict, and the device is finally confirmed as the first jamming device. Afterward, interference can be initiated, and each interference cycle will be executed cyclically.

[0093] For the pseudo-first jamming device, the timing sequence before acquiring the second frequency band signal of all operating frequency bands is the same as that in Figure 12. The difference is that when it determines that it is not the first jamming device based on the second frequency band signal, it will first identify the jamming signal shutdown time period and the jamming signal output time period based on the received jamming signal according to the timing sequence shown in Figure 4. Then, it will receive the base station signal during each jamming signal shutdown time period and generate the jamming signal based on the base station signal. Finally, it will cycle through the subsequent jamming cycles.

[0094] Optionally, in one embodiment of the multi-machine synchronous shielding method of the present invention, it further includes: S4, when the interfering device is determined to be the first interfering device, the interfering device receives the base station signal during the interfering signal shutdown period and calibrates the interfering signal according to the received base station signal.

[0095] Step S4 in this embodiment can be executed after step S21 in the embodiment shown in Figure 1, or after step S25 in the embodiment shown in Figure 11. That is, after the first interfering device starts interfering, the base station signal can continue to be received during the period when the interfering signal is off. The clock deviation of the interfering device is corrected according to the base station signal to ensure that the timing of the interfering signal and the base station signal is always consistent. The specific adjustment process can be: at least some of the synchronization signals in the interfering signal must be transmitted at the same time as the synchronization signals in the base station signal in order to achieve a better interference effect. Therefore, in this embodiment, the base station signal is received again, the time domain position of the synchronization signal in the base station signal received again is calculated, and then the time domain position of the newly obtained synchronization signal is compared with the time domain position of the synchronization signal that was transmitted at the same time as the base station according to the local clock during the previous generation of the interfering signal to obtain the difference in the time domain positions of the two synchronization signals. The signal offset is performed according to the difference, so that the timing of the interfering signal and the base station signal is re-aligned, thereby realizing the calibration of the interfering signal.

[0096] It should be noted that the first jamming device can receive base station signals for calibration during the jamming signal shutdown period in each jamming cycle, or it can perform calibration every few jamming cycles, all of which are within the scope of protection of this application.

[0097] Optionally, in one embodiment of the multi-machine synchronous shielding method of the present invention, it further includes: S5 When the interfering device is not the first interfering device, after transmitting the interfering signal during the interfering signal output time period, the interfering device receives the base station signal during the interfering signal shutdown time period and calibrates the interfering signal according to the base station signal.

[0098] Step S5 in this embodiment can be executed after step S32 in the embodiment shown in Figure 1, or after step S32 in the embodiment shown in Figure 11. Similarly, when the interfering device is not the first interfering device, the interfering signal can be calibrated by receiving the base station signal during the interfering signal shutdown period after the interfering is turned on. The specific adjustment process can be as follows: re-receive the base station signal, calculate the time domain position of the synchronization signal in the re-received base station signal, and then compare the time domain position of the re-obtained synchronization signal with the time domain position of the synchronization signal determined by the local clock during the previous generation of the interfering signal to obtain the difference in the time domain positions of the two synchronization signals. Based on this difference, a signal offset is performed so that the timing of the interfering signal and the base station signal is realigned.

[0099] It should be noted that non-first interfering devices may receive base station signals for calibration during the interference signal shutdown period in each interference cycle, or they may perform calibration every few interference cycles. These are all within the scope of protection of this application.

[0100] It is understandable that all jamming devices receive the same base station signal during the jamming signal shutdown period. Therefore, the calibration effect of the jamming signal based on the same base station signal is also the same, ultimately ensuring that the jamming signals emitted by all jamming devices are time-aligned with the same base station signal. Furthermore, by utilizing the synchronized jamming signal shutdown period for calibration, there is no need to set an additional separate time period for the calibration operation, thus avoiding excessively long jamming interruptions and ensuring the jamming effect.

[0101] Another embodiment of the present invention proposes a multi-device jamming system, comprising: multiple jamming devices. When any jamming device is determined to be the first jamming device, it performs the following steps: the jamming device receives a base station signal and generates an interference signal based on the base station signal; it transmits the interference signal during the interference signal output period and does not transmit the interference signal during the interference signal shutdown period. When any jamming device is determined not to be the first jamming device, it performs the following steps: the jamming device obtains the interference signal shutdown period and the interference signal output period based on the received signal; it receives a base station signal during the interference signal shutdown period to generate an interference signal based on the base station signal; it transmits the interference signal during the interference signal output period and does not transmit the interference signal during the interference signal shutdown period.

[0102] In other words, a multi-machine shielding system is constructed using multiple jamming devices. Before officially activating jamming, each jamming device determines whether it is the first jamming device and executes the corresponding steps based on the confirmation result. The specific process can be referred to the detailed steps of a multi-machine synchronous shielding method described above, and will not be repeated here.

[0103] Another embodiment of the present invention provides an electronic device that may further include a memory and a processor. The memory is used to store a computer program. The processor is used to execute the computer program to implement any of the methods described above. Specifically, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, when the computer program is downloaded, installed, and executed by an electronic device, it performs the functions defined in the methods of the embodiments of the present invention. The electronic device in the present invention may be a terminal such as a laptop, desktop computer, tablet computer, or smartphone, or it may be a server.

[0104] Another embodiment of the present invention provides a computer storage medium storing a computer program thereon, which, when executed by a processor, implements any of the methods described above. Specifically, it should be noted that the computer-readable medium described above in the present invention can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, wherein computer-readable program code is carried. The transmitted data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0105] The aforementioned computer-readable medium may be included in the aforementioned electronic device; or it may exist independently and not assembled into the electronic device.

[0106] In another embodiment of the present invention, a computer program product is provided, on which a computer program is stored, and when the computer program is executed by a processor, it implements any of the methods described above.

[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A multi-machine synchronous shielding method, the multi-machine synchronous shielding method comprising: Determine whether the jamming device is the first jamming device, wherein the first jamming device is the first jamming device to transmit the jamming signal; When the jamming device is determined to be the first jamming device, the following steps are performed: The jamming device receives base station signals and generates jamming signals based on the base station signals; The interference signal is transmitted during the period when the interference signal is output, and the interference signal is not transmitted during the period when the interference signal is turned off. If it is determined that the jamming device is not the first jamming device, the following steps are performed: The jamming device obtains the jamming signal off time period and the jamming signal output time period based on the received signal; During the period when the interference signal is turned off, the base station signal is received to generate the interference signal based on the base station signal; The interference signal is transmitted during the period when the interference signal is output, and the interference signal is not transmitted during the period when the interference signal is turned off.

2. The multi-machine synchronous shielding method according to claim 1, characterized in that, The determination of whether the interfering device is the first interfering device includes: Determine whether the interference device receives the interference signal; If the jamming device receives the jamming signal, it is determined that the jamming device is not the first jamming device; If the jamming device does not receive the jamming signal, then the jamming device is determined to be the first jamming device.

3. The multi-machine synchronous shielding method according to claim 2, characterized in that, The step of determining whether the interference device receives the interference signal includes: Acquire first frequency band signals corresponding to all operating frequency bands of the interference device; the acquisition duration of each operating frequency band signal in the first frequency band signal is greater than or equal to the sum of the duration of the interference signal off period and the duration of the interference signal output period; It is determined whether the interference device receives the interference signal based on the first frequency band signal.

4. The multi-machine synchronous shielding method according to claim 3, characterized in that, The step of determining whether the interference device receives the interference signal based on the first frequency band signal includes: Obtain the characteristics of the synchronization signal in the first frequency band signal; When the characteristics of the synchronization signal are the first preset characteristics, it is determined that the interference device has received the interference signal; When the characteristics of the synchronization signal are not the first preset characteristics, it is determined that the interference device has not received the interference signal.

5. The multi-machine synchronous shielding method according to claim 3, characterized in that, The step of acquiring the first frequency band signal corresponding to all operating frequency bands of the jamming device includes: If the interference device includes a receiving channel and multiple transmitting channels, and the frequency band corresponding to each transmitting channel is the same as a working frequency band, for each frequency band corresponding to the transmitting channel, a first sub-frequency band signal of a first preset duration is obtained sequentially through the receiving channel; all the first sub-frequency band signals constitute the first frequency band signal; If the interference device includes M receiving channels and M transmitting channels, and M>1, and the frequency band corresponding to each transmitting channel is the same as a working frequency band, the second sub-frequency band signals received by all the receiving channels are acquired within a first preset time period, and all the second sub-frequency band signals constitute the first frequency band signal; Wherein, the first preset duration is greater than or equal to the sum of the durations of the interference signal shutdown period and the interference signal output period.

6. The multi-machine synchronous shielding method according to claim 1, characterized in that, After determining that the interfering device is the first interfering device, and after the interfering device receives the base station signal and generates an interfering signal based on the base station signal, the method further includes: The system receives signals from the environment again and determines whether the interference signal exists in the environment based on the signals received from the environment. If the interference signal is present in the environment, it is determined that the interference device is not the first interference device, and the subsequent steps of the method for determining that the interference device is not the first device are executed. If the interference signal is not present in the environment, the interference device is identified as the first device, and the process continues to transmit the interference signal during the interference signal output period and not transmit the interference signal during the interference signal off period.

7. The multi-machine synchronous shielding method according to claim 6, characterized in that, After receiving signals from the environment again, the method further includes: The interference signal is transmitted during the period when the interference signal is output.

8. The multi-machine synchronous shielding method according to claim 6, characterized in that, The step of determining whether the interference signal exists in the environment based on the signals in the environment includes: Acquire the second frequency band signal corresponding to all operating frequency bands of the interference device; If it is determined that the second frequency band signal contains the interference signal, then it is determined that the interference signal exists in the environment; If it is determined that the second frequency band signal does not contain the interference signal, then it is determined that the interference signal does not exist in the environment.

9. The multi-machine synchronous shielding method according to claim 8, characterized in that, The step of determining whether the jamming device is the first jamming device includes: Acquire the first frequency band signal corresponding to all operating frequency bands of the jamming device; Determine whether the interference device receives the interference signal based on the first frequency band signal; If the jamming device receives the jamming signal, it is determined that the jamming device is not the first jamming device; if the jamming device does not receive the jamming signal, it is determined that the jamming device is the first jamming device. The duration of each operating frequency band signal in the second frequency band signal is greater than the duration of the interference signal shutdown period, and the duration of the second frequency band signal is less than the duration of the first frequency band signal.

10. The multi-machine synchronous shielding method according to claim 1, characterized in that, The interference device receives base station signals including: The jamming device receives base station signals corresponding to all operating frequency bands.

11. The multi-machine synchronous shielding method according to claim 1, characterized in that, When it is determined that the interfering device is not the first interfering device, the base station signal is received during the interfering signal shutdown period to generate the interfering signal based on the base station signal, including: The base station signals corresponding to each operating frequency band of the interference device are received during different interference signal shutdown periods. The interference signal is generated based on the received base station signal.

12. The multi-machine synchronous shielding method according to any one of claims 1-11, characterized in that, The multi-machine synchronous shielding method also includes: When the interference device is determined to be the first interference device, the interference device receives the base station signal during the interference signal shutdown period and calibrates the interference signal based on the received base station signal.

13. The multi-machine synchronous shielding method according to any one of claims 1-11, characterized in that, The multi-machine synchronous shielding method also includes: When the jamming device is not the first jamming device, after the jamming signal is transmitted during the jamming signal output period, the jamming device receives the base station signal during the jamming signal shutdown period and calibrates the jamming signal according to the base station signal.

14. A multi-machine shielding system, comprising: Multiple jamming devices; When any of the aforementioned interference devices is determined to be the first interference device, the following steps are performed: The jamming device receives base station signals and generates jamming signals based on the base station signals; The interference signal is transmitted during the period when the interference signal is output, and the interference signal is not transmitted during the period when the interference signal is turned off. If any of the aforementioned jamming devices is determined not to be the first jamming device, the following steps are performed: The jamming device obtains the jamming signal off time period and the jamming signal output time period based on the received signal; During the period when the interference signal is turned off, the base station signal is received to generate the interference signal based on the base station signal; The interference signal is transmitted during the period when the interference signal is output, and the interference signal is not transmitted during the period when the interference signal is turned off.

15. An electronic device, the electronic device comprising a memory and a processor; The memory is used to store computer programs; The processor is used to execute the computer program to implement the method as described in any one of claims 1 to 13.

16. A computer storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the method as described in any one of claims 1 to 13.

17. A computer program product comprising a computer program; said computer program being executed by a processor to perform the steps of the method according to any one of claims 1 to 13.

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