Multi-machine synchronous shielding method and related products

Abstract

The present invention relates to a multi-machine synchronous shielding method and related products. The method comprises: determining whether the interference device is the first interference device; if so: the interference device generates an interference signal according to the received base station signal; transmits the interference signal in the interference signal output time period, and does not transmit the interference signal in the interference signal off time period; otherwise: the interference device obtains the interference signal off time period and the interference signal output time period according to the received signal; receives the base station signal in the interference signal off time period to generate the interference signal according to the base station signal; transmits the interference signal in the interference signal output time period, and does not transmit the interference signal in the interference signal off time period. In the present invention, the interference device that is turned on first will not send the interference signal in the interference signal off time period, so the interference device that is turned on later can receive the accurate base station signal, thereby realizing the synchronization of multiple interference devices and improving the shielding effect.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and more specifically, to a multi-machine synchronous shielding method, system, electronic equipment, storage medium and computer program product. Background Art

[0002] Interference equipment, such as frequency jammers, are usually used in scenarios such as bomb disposal, counter-terrorism, and technical reconnaissance that require wireless signal blocking to protect the safety of the social environment. For interference sites with larger areas, multiple interference devices need to be deployed to various locations in the site to cover the entire interference site. If multiple interference devices are turned on at different times, so that the signal received by the interference device turned on later includes the interference signal sent by the interference device turned on earlier in addition to the base station signal, the interference device turned on later will not be able to receive the correct base station signal, resulting in poor interference effect of the interference device turned on later. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a multi-machine synchronous shielding method, system, electronic device, storage medium and computer program product for the above-mentioned technical problem of how to achieve synchronous shielding of multiple interference devices in the prior art.

[0004] The technical solution adopted by the embodiment of the present invention to solve the technical problem is: constructing a multi-machine synchronous shielding method, the multi-machine synchronous shielding method comprising:

[0005] Determining whether the interference device is a first interference device, wherein the first interference device is an interference device that first transmits an interference signal;

[0006] When it is determined that the interfering device is the first interfering device, the following steps are performed:

[0007] The interference device receives a base station signal and generates an interference signal according to the received base station signal;

[0008] transmitting the interference signal during the interference signal output time period, and not transmitting the interference signal during the interference signal off time period;

[0009] When it is determined that the interfering device is not the first interfering device, the following steps are performed:

[0010] The interference device obtains the interference signal off time period and interference signal output time period of other interference devices that have started interference according to the received signal;

[0011] receiving the base station signal within the interference signal off time period to generate the interference signal according to the base station signal;

[0012] The interference signal is transmitted during the interference signal output time period, and the interference signal is not transmitted during the interference signal off time period.

[0013] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, the step of determining whether the interfering device is the first interfering device includes:

[0014] Determining whether the interference device receives the interference signal;

[0015] If the interference device receives the interference signal, it is determined that the interference device is not the first interference device;

[0016] If the interference device does not receive the interference signal, it is determined that the interference device is the first interference device.

[0017] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, the step of determining whether the interference device receives the interference signal includes:

[0018] Acquire a first frequency band signal corresponding to all working frequency bands of the interference device; the acquisition duration of the signal of each working frequency band in the first frequency band signal is greater than or equal to the sum of the duration of the interference signal off time period and the interference signal output time period;

[0019] Determine whether the interference device receives the interference signal according to the first frequency band signal.

[0020] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, judging whether the interference device receives the interference signal according to the first frequency band signal includes:

[0021] Acquire characteristics of a synchronization signal in the first frequency band signal;

[0022] When the characteristic of the synchronization signal is a first preset characteristic, determining that the interference device receives the interference signal;

[0023] When the characteristic of the synchronization signal is not the first preset characteristic, it is determined that the interference device has not received the interference signal.

[0024] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, the step of acquiring a first frequency band signal corresponding to all operating frequency bands of the interfering device includes:

[0025] If the interference device includes one receiving channel and multiple transmitting channels, and the frequency band corresponding to each of the transmitting channels is the same as one of the working frequency bands, for the frequency bands corresponding to each of the transmitting channels, the first sub-frequency band signals of the first preset time length are obtained respectively through the receiving channels in turn; all the first sub-frequency band signals constitute the first frequency band signal; working frequency band If the interference device includes M receiving channels and M transmitting channels, and M>1, and the frequency band corresponding to each of the transmitting channels is the same as one of the working frequency bands, the second sub-frequency band signals received by all the receiving channels are obtained within the first preset time length, and all the second sub-frequency band signals constitute the first frequency band signal; wherein, the first preset time length is greater than or equal to the sum of the duration of the interference signal off time period and the interference signal output time period.

[0026] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, after determining that the interference device is the first interference device and after the interference device receives a base station signal and generates an interference signal according to the base station signal, the method further includes:

[0027] Receiving the signal in the environment again, and judging whether the interference signal exists in the environment according to the signal in the environment;

[0028] If the interference signal exists in the environment, determining that the interference device is not the first interference device, and executing the subsequent steps of the method for determining that the interference device is not the first device;

[0029] If the interference signal does not exist in the environment, the interference device is determined to be the first device, and the interference signal is continuously transmitted during the interference signal output time period, and the interference signal is not transmitted during the interference signal off time period.

[0030] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, after receiving the signal in the environment again, the method further includes:

[0031] The interference signal is emitted during an interference signal output time period.

[0032] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, judging whether the interference signal exists in the environment according to the signal in the environment includes:

[0033] Acquire a second frequency band signal corresponding to all working frequency bands of the interference device;

[0034] If it is determined that the second frequency band signal includes the interference signal, then determining that the interference signal exists in the environment;

[0035] If it is determined that the second frequency band signal does not include the interference signal, it is determined that the interference signal does not exist in the environment.

[0036] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, the step of determining whether the interfering device is the first interfering device includes:

[0037] Acquire a first frequency band signal corresponding to all working frequency bands of the interference device;

[0038] Determine whether the interference device receives the interference signal according to the first frequency band signal;

[0039] If the interference device receives the interference signal, it is determined that the interference device is not the first interference device; if the interference device does not receive the interference signal, it is determined that the interference device is the first interference device;

[0040] The duration of the signal of each working frequency band in the second frequency band signal is greater than the duration of the interference signal off time period, and the duration of the second frequency band signal is less than the duration of the first frequency band signal.

[0041] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, the interference device receiving a base station signal includes:

[0042] Acquire base station signals corresponding to all operating frequency bands of the interfering device;

[0043] and / or,

[0044] When it is determined that the interfering device is not the first interfering device, receiving the base station signal within the interference signal off time period to generate the interference signal according to the base station signal, including:

[0045] Receiving interference signals corresponding to each working frequency band of the interference device in different interference signal off time periods respectively;

[0046] All interference signals are used as the base station signals to generate the interference signals according to the base station signals.

[0047] Preferably, in a multi-machine synchronous shielding method provided in an embodiment of the present invention, it further includes:

[0048] When it is determined that the interference device is the first interference device, the interference device receives a base station signal during an interference signal off time period, and calibrates the interference signal according to the received base station signal;

[0049] And / or, when the interference device is not the first interference device, after transmitting the interference signal in the interference signal output time period, the interference device receives the base station signal in the interference signal off time period and calibrates the interference signal according to the base station signal.

[0050] The embodiment of the present invention also discloses a multi-machine shielding system, comprising: a plurality of interference devices;

[0051] Wherein, when any of the interference devices is determined to be the first interference device, the following steps are performed:

[0052] The interference device receives a base station signal and generates an interference signal according to the base station signal;

[0053] transmitting the interference signal during the interference signal output time period, and not transmitting the interference signal during the interference signal off time period;

[0054] When any of the interference devices is determined not to be the first interference device, the following steps are performed:

[0055] The interference device obtains the interference signal off time period and interference signal output time period of other interference devices that have started interference according to the received signal;

[0056] receiving the base station signal within the interference signal off time period to generate the interference signal according to the base station signal;

[0057] The interference signal is transmitted during the interference signal output time period, and the interference signal is not transmitted during the interference signal off time period.

[0058] An embodiment of the present invention further discloses an electronic device, the electronic device comprising a memory and a processor;

[0059] The memory is used to store computer programs;

[0060] The processor is configured to execute the computer program to implement the method described above.

[0061] The embodiment of the present invention further discloses a computer storage medium on which a computer program is stored. When the computer program is executed by a processor, the method described above is implemented.

[0062] The embodiment of the present invention further discloses a computer program product, including a computer program; the computer program can be executed by a processor to implement the above method.

[0063] By implementing a multi-machine synchronous shielding method, system, electronic device, storage medium and computer program product proposed in the embodiments of the present invention, the interference device that is turned on later can receive the base station signal during the interference signal off time period. Since the interference device that is turned on earlier will not send an interference signal during the interference signal off time period, the interference device that is turned on later can receive the accurate base station signal, thereby realizing the synchronous interference of multiple interference devices to the interference place, thereby improving the overall shielding effect of the interference place. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0065] Figure 1 It is a program flow chart of an embodiment of a multi-machine synchronous shielding method of the present invention;

[0066] Figure 2 It is a schematic diagram of the working timing after the interference device starts interfering in one embodiment of a multi-machine synchronous shielding method of the present invention;

[0067] Figure 3 This 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;

[0068] Figure 4 It is a schematic diagram of the working timing of a non-first interference device and a first interference device in an embodiment of a multi-machine synchronous shielding method of the present invention;

[0069] Figure 5 yes Figure 1 A flowchart of an embodiment of step S1 in the illustrated embodiment;

[0070] Figure 6 yes Figure 5 The illustrated embodiment includes a program flow chart of an embodiment of a specific implementation method of step S11;

[0071] Figure 7 is a flowchart of an embodiment of step S11b in the embodiment shown in FIG6 ;

[0072] Figure 8 It is a schematic diagram of the first frequency band signal acquired by the later-entering interference device;

[0073] Fig. 9 yes Figure 6 The illustrated embodiment includes a flowchart of a specific implementation of step S11a;

[0074] Fig.10 yes Figure 6 The illustrated embodiment includes a program flow chart of another embodiment of a specific implementation of step S11a;

[0075] Fig.11 It is a program flow chart of another embodiment of a multi-machine synchronous shielding method of the present invention;

[0076] Fig.12 It is a schematic diagram of the working timing of another embodiment of the first interference device of the present invention. DETAILED DESCRIPTION

[0077] In order to have a clearer understanding of the technical features, purposes and effects of the technical solution of the present invention, the specific implementation mode of the present invention is described in detail with reference to the accompanying drawings.

[0078] like Figure 1 , shows a first embodiment of a multi-machine synchronous shielding method proposed in an embodiment of the present invention, in Figure 1 In the first embodiment of a multi-machine synchronous shielding method of the present invention, the multi-machine synchronous shielding method includes: S1, judging whether the interference device is the first interference device, wherein the first interference device is the first interference device to transmit an interference signal. S2, when the interference device is determined to be the first interference device, executing the following steps S21 and S22, S3, when the interference device is determined not to be the first interference device, executing the following steps S31, S32 and S33. Among them, the specific steps include: S21, the interference device receives the base station signal and generates an interference signal according to the received base station signal. S22, transmits the interference signal in the interference signal output time period, and does not transmit the interference signal in the interference signal off time period. And S31, the interference device obtains the interference signal off time period and the interference signal output time period according to the received signal. S32, receives the base station signal in the interference signal off time period to generate the interference signal according to the base station signal. S33, transmits the interference signal in the interference signal output time period, and does not transmit the interference signal in the interference signal off time period.

[0079] In an embodiment of the present invention, the above method can be performed by an interference device (such as a frequency jammer) or a signal interference module (the interference module can realize the function of signal interference and can be installed on other types of equipment). The interference device or signal interference module can be a software modification and upgrade for an existing hardware device to implement the above method. Alternatively, the above method can also be implemented by controlling an existing interference device or interference module through a host device such as a computer. The following description takes the execution subject as an interference device as an example to explain the multi-machine synchronous shielding method proposed in the embodiment of the present application.

[0080] Among them, during the operation, the interference device will generate a corresponding interference signal according to the received base station signal, and interfere with the user terminal such as the mobile phone through the interference signal, so that the user terminal cannot communicate with the base station, thereby shielding the user terminal such as the mobile phone. Among them, whether the real base station signal can be received directly affects the effect of the interference. In some areas, when multiple interference devices are required to shield user terminals such as mobile phones at the same time, each interference device needs to perform the same operation. However, in the process of multiple interference devices working at the same time, in order to enable all interference devices to correctly receive the real base station signal sent by the base station in the actual environment, multiple interference devices need to be synchronized before interference, that is, the purpose of multi-machine synchronization in this embodiment is to enable all interference devices to receive the signal sent by the base station at a specific time, that is, at a specific time, everyone stops interfering and receives the base station signal together. Therefore, the synchronous operation of multiple interference devices can be achieved through the above process.

[0081] Based on the above step S1, before the interference device starts to generate an interference signal, it is first determined whether the interference device is the first interference device. Among them, when the interference device is interfering, it needs to synchronize with the corresponding base station first (so that the timing of the interference signal is consistent with the base station, thereby achieving the interference effect), and after completing the synchronization, the interference can be turned on. In this embodiment, the first interference device is the interference device that first transmits the interference signal. If before the interference device, other interference devices have completed synchronization with the corresponding base station and have begun to interfere, then the interference device is not the first interference device defined in this interference process. The interference device can determine whether it is the first interference device by communicating with other interference devices to determine whether an interference device has begun to interfere, or by determining whether there is an interference signal in the current environment and other methods, which are not limited to this embodiment of the present application.

[0082] Based on step S2, when it is determined that the current interference device is the first interference device, the interference device can generate an interference signal according to the received base station signal, wherein the interference signal is an interference signal 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 it is a random code. The specific method of the interference signal can refer to the prior art, and this embodiment does not limit it. After that, the interference can be started, and the specific scheme of the interference is: by outputting or shutting down the interference signal in different time periods. For example, the interference signal output time period and the interference signal off time period are obtained, and the interference device outputs the interference signal to the outside during the interference signal output time period, and does not emit the interference signal to the outside during the interference signal off time period. Among them, an interference signal output time period and an interference signal off time period can constitute an interference cycle, and the interference device can cyclically execute the interference cycle to achieve interference. Among them, the interference signal output time period and the interference signal off time period can be pre-set and stored in each interference device, or it can also be generated by the interference device in real time by the corresponding algorithm after the power is turned on, or it can also be set by the operator through the interaction module, or it can also be sent by the control terminal, and this embodiment of the application is not limited. It should be noted that no matter it is the first interference device or a non-first interference device, once the interference is turned on, the above interference cycle will be executed cyclically.

[0083] In one embodiment, Figure 2 The timing diagram shows that when the interference device performs interference, it includes one interference signal output time period and two interference signal off time periods. Among them, TX indicates that the interference device is in a state of transmitting an interference signal, that is, T1 indicates the interference signal output time period, and RX indicates that the interference device does not transmit an interference signal, that is, T2 indicates the interference signal off time period. For example, the single duration of the interference signal output time period can be set to 1000ms, and the single duration of the interference signal off time period can be set to 24ms. Therefore, after the interference is turned on, the interference device can send interference signals for 1000ms, and then stop sending interference signals for 24ms, and then send interference signals for 1000ms again..., and then cycle through each interference cycle. Among them, as long as all interference devices turn on interference, they will transmit interference signals in the same time period (i.e., the interference signal output time period), and will not transmit interference signals in the same time period (i.e., the interference signal off time period).

[0084] Based on step S3, when it is determined that the current interference device is not the first interference device (hereinafter, for simplified description, it is represented by "later network interference device"), it can be understood that it means that other interference devices have already turned on interference, that is, the interference cycle mentioned above has begun to be cyclically executed. At this time, the later network interference device can obtain the interference signal off time period and interference signal output time period of other interference devices according to the received signal. Since the interference device that has turned on interference has been cyclically executing the above interference cycle, the current interference device can analyze the law of other interference devices sending interference signals through the received signal, so that the interference signal off time period and interference signal output time period can be extracted. It should be noted that in the use scenario of synchronous shielding of multiple interference devices, all interference devices are usually for interfering with the same area, such as a prison or a teaching building. Therefore, all interference devices usually receive base station signals from the same base station, that is, each interference device is an interference signal generated based on the same base station signal, that is, the interference signals taken by each interference device are consistent. Therefore, each interference device can identify which are interference signals and which are base station signals. Therefore, the late-entry interference device can determine the rules of the interference signal output time period and the interference signal off time period, that is, the duration of each of the two time periods in an interference cycle, by judging which time periods contain interference signals and which time periods contain no interference signals. After determining the interference signal off time period and the interference signal output time period, the late-entry interference device can receive the base station signal in the interference signal off time period in one or more subsequent interference cycles, and then generate an interference signal based on the received base station signal, and then start to cyclically execute each interference cycle, that is, transmit the interference signal in the interference signal output time period, and stop transmitting the interference signal in the interference signal off time period, and cyclically execute each interference cycle.

[0085] Among them, since there is no interference signal in the environment during the interference signal off time, the later-entering interference device can generate an interference signal based on the real base station signal and will not be affected by the interference signal emitted by other interference devices, which is beneficial to improve the interference effect of the later-entering interference device.

[0086] For non-first interference devices, because there are interference signals emitted by other interference devices in the current area, non-first interference devices cannot receive base station signals at any time like the first interference device. Instead, they need to obtain the interference signal off time period and the interference signal output time period through the interference signals sent by other interference devices, and generate interference signals according to the base station signals received during the interference signal off time period. In addition, in order not to affect the interference devices that subsequently re-enter the network, all interference devices that have entered the network (i.e., have completed synchronization with the base station) need to start interference and execute according to the same interference signal off time period and interference signal output time period, that is, in the interference signal off time period, all interference devices that have entered the network stop transmitting interference signals to ensure that the interference devices that enter the network later can obtain the real base station signal during the interference signal off time period.

[0087] The above-mentioned multi-machine synchronous shielding method provided in this embodiment allows all interference devices to receive accurate and real base station signals in any interference signal off time period after other interference devices have started interference, without being interfered by the interference signals emitted by other interference devices, so as to achieve the effect that even if multiple interference devices are not started at the same time, they can eventually be accurately synchronized with the base station.

[0088] like Figure 5 As shown, in one embodiment, step S1, i.e., determining whether the interference device is the first interference device, includes: S11, determining whether the interference device receives an interference signal. S12, if the interference device receives an interference signal, determining that the interference device is not the first interference device. S13, if the interference device does not receive an interference signal, determining that the interference device is the first interference device.

[0089] Specifically, it is possible to determine whether the interference device is the first interference device based on whether the interference device can receive the interference signal. It is understandable that when the interference device is not the first interference device, it can receive the interference signal output by other interference devices when the signal receiving time is long enough. On the contrary, if the interference device has not received the interference signal output by other interference devices, it means that the interference device is the first interference device. Therefore, when the interference device can receive the interference signal, it can determine that it is not the first interference device, otherwise it can determine that it is the first interference device. Since the interference signal is generated according to the base station information and the preset rules, the specific content of the interference signal may be different from the base station signal. Therefore, the interference device can determine whether the interference signal is received by detecting whether there is a specific signal feature in the received signal that the interference signal has but the base station signal does not have. Specifically: when the interference device detects a specific signal feature from the received signal, it can be determined that the interference signal is received, and when the specific signal feature is not detected in the received signal, it can be determined that the interference signal is not received. Among them, the specific signal characteristics of the interference signal can be some signal characteristics that can be detected but will not affect the interference effect. For example, the specific signal characteristics can be the specific content of the interference signal (such as a random sequence that changes according to a set rule), which is not limited in this embodiment.

[0090] like Figure 6 As shown, on the basis of the above, the following steps can also be used to determine whether the interference device receives the interference signal. Step S11 specifically includes: S11a, obtaining a first frequency band signal corresponding to all working frequency bands of the interference device, and the acquisition duration of the signal of each working frequency band in the first frequency band signal is greater than or equal to the sum of the duration of the interference signal off time period and the interference signal output time period. S11b, judging whether the interference device receives the interference signal according to the first frequency band signal.

[0091] By setting the working state of the interference device, it is in a state where it can receive interference signals of all working frequency bands, and the interference device is allowed to receive external signals in the environment within a certain period of time, and the interference signal is identified from the external signal. Among them, each working frequency band is the same as a communication frequency band that will appear in the interference place (for example, the B1 frequency band in the FDD-LTE technology), that is, the interference signal of the working frequency band can interfere with the signal of the communication frequency band. All working frequency bands are the same as all communication frequency bands that will appear in the interference place, so the interference signals of all working frequency bands can interfere with the signals of all communication frequency bands that appear in the interference place. In this embodiment, the center frequency and bandwidth of the signal received by the receiving antenna of the interference device can be set to switch the frequency band of the signal received by the receiving antenna to be in each working frequency band of the interference device in turn, thereby realizing step S11a. Among them, the first frequency band signal can be the interference signal of all working frequency bands that receive the set time, and for each working frequency band, the duration of the received signal is at least greater than the duration of an interference cycle.

[0092] It is understandable that the signal components in the first frequency band signal obtained by the first interference device and the non-first interference device are different. The first frequency band signal obtained by the first interference device does not contain the interference signal at all times, but only contains the base station signal. However, at least one frequency band in the first frequency band signal obtained by the non-first interference device will contain both the interference signal and the base station signal of the frequency band at least partially. Therefore, it can be determined by step S11b whether the interference device has received the interference signal.

[0093] Among them, for each working 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 the above-mentioned interference cycle (the sum of the duration of the interference signal off time period and the interference signal output time period) to ensure that the later-entering interference equipment can identify the interference signal output time period and the interference signal off time period.

[0094] In one embodiment, if Figure 7 As shown, the above step S11b, i.e., judging whether the interference device receives the interference signal according to the first frequency band signal, includes: S11b1, obtaining the characteristics of the synchronization signal in the first frequency band signal. S11b2, when the characteristics of the synchronization signal are the first preset characteristics, judging that the interference device receives the interference signal. S11b3, when the characteristics of the synchronization signal are not the first preset characteristics, judging that the interference device does not receive the interference signal. Among them, the execution order of S11b2 and S11b3 is not limited, for example, they can be performed simultaneously or one after another.

[0095] In this embodiment, the interference signal may also include a synchronization signal, and the synchronization signal in the interference signal may affect the user terminal's analysis of the synchronization signal in the base station signal, thereby interfering with the user terminal's communication. The synchronization signal in the interference signal may be configured to have the same content as the synchronization signal in the base station signal, but have a different period from the synchronization signal in the base station signal, for example, the period of the synchronization signal of the interference signal is shorter than the period of the synchronization signal of 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 is referred to as the synchronization interference signal hereinafter.

[0096] The interference device can extract the synchronization signal from the acquired first frequency band signal to determine whether the received signal has an interference signal. In this solution, the first frequency band signal received by the first interference device and the non-first interference device may include different signals in different time periods. For example, the part of the signal received by the non-first interference device in the interference signal output time period may include the synchronization signal (PSS signal or SSS signal) and the synchronization interference signal (such as: PSS interference signal or SSS interference signal, wherein the PSS interference signal is used to affect the user terminal's analysis of the PSS signal, and the content is the same as the PSS signal, but the period is different from the PSS signal; the SSS interference signal is used to affect the user terminal's analysis of the SSS signal, and the content is the same as the SSS signal, but the period is different from the SSS signal), and the part of the signal received in the interference signal off time period only includes the synchronization signal (PSS signal or SSS signal) in the base station signal. However, if the reception time of each working frequency band is greater than an interference period, it can be guaranteed that the interference signals emitted by other interference devices in the interference signal output stage can be received, so that the current interference device can be determined as a non-first interference device by identifying the synchronization interference signal. It is understandable that the first frequency band signal received by the first interfering device only includes the synchronization signal (PSS signal or SSS signal) in the base station signal. Therefore, since there is no interfering signal in the signal received by the first interfering device, it can be determined as the first interfering device.

[0097] In a specific embodiment, the characteristic of the synchronization signal is 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, and whether the first frequency band signal contains an interference signal is determined according to the judgment result. In a specific embodiment, when no interference device is turned on for interference, the first frequency band signal in the environment is only a base station signal, and the period of the PSS signal in the base station signal is 5ms. When an interference device turns on interference, there are both PSS interference signals and PSS signals of base stations in the environment, and the period of the PSS interference signal is another period different from 5ms set in advance, for example, it can be 66.667us. Therefore, in this embodiment, by obtaining the first frequency band signal (for example, the I / Q data captured by each working frequency band in 1.05s) for analysis, it can be determined whether there is a PSS signal with a period of 66.667us. If it exists, it can be determined that there is an interference signal in the environment, otherwise, it can be determined that there is no interference signal in the environment. In one embodiment, it can also be identified by other characteristic information according to the specific implementation method of the interference signal, such as signal amplitude or signal phase, or it can be a combination of the above characteristic information. The acquisition duration of the first frequency band signal may at least include a cycle consisting of a complete interference signal output time period and an interference signal off time period.

[0098] In another optional embodiment, when the synchronization signal is an SSS signal, the interference signal corresponds to an SSS interference signal, and the implementation method of the above steps S11b1, S11b2, and S11b3 can refer to the embodiment when the above synchronization signal is a PSS signal, which is not repeated here.

[0099] like Figure 8 As shown in the figure, it shows the timing diagram of the interference device receiving data. Figure 8 It is specifically described how a non-first interference device identifies itself as a non-first interference device, and obtains the interference signal off time period and the interference signal output time period according to the received signal. Figure 8 In the embodiment, the interference signal output time period is 1000ms (i.e. 1S), the interference signal off time period is 24ms, and the acquisition time length of each working frequency band in the first frequency band signal is 1.05s. If the interference device is not the first interference device, the 1.05s captured by the interference device contains at least one 1s interference signal output time period and two 24ms interference signal off time periods. Therefore, by judging the characteristics of the synchronization signal in 1.05s, it can be determined which time in 1.05s belongs to the 1s interference signal output time period and which time belongs to the 24ms interference signal off time period. Here, the characteristic of the synchronization signal is periodic, and the synchronization signal is a PSS signal as an example to explain. Figure 8The principle of identifying each time period in the interference device. By judging the period of the PSS signal in 1.05s, it can be found that the period of the PSS signal in the initial T1 (500ms) time period is 66.667us, the period of the PSS signal in the middle T2 (24ms) time period is 5ms, and the period of the PSS signal in the subsequent T3 (526ms) time period is 66.667ms. Based on this, it can be known that interference signals are received during T1 and T3, so it belongs to the interference signal output time period, and it can also be determined that the interference device is not the first interference device. No interference signal is received in the T2 time period, but only the base station signal is received, so it is the interference signal off time period. Combining the known interference cycle including the duration of the interference signal output time period (1000ms) and the duration of the interference signal shutdown time period (24ms), it can be calculated that the interference signal output time period of the interference device that has turned on the interference is 474ms left (that is, it still needs to go through the T4 time period), and the next interference signal shutdown time period will appear between T5 (1.524s and 1.548s). Therefore, by allowing itself to capture data in the T5 time period, the interference device can obtain the base station signal without interference signals to achieve synchronization with the base station.

[0100] It can be understood that when the interference device is the first interference device, even if the captured 1.05s includes a 1s interference signal output time period and two 24ms interference signal off time periods, because there is currently no interference signal in the environment, it is impossible to identify the existence of the interference signal, and thus confirm that it is the first interference device.

[0101] In one embodiment, if Fig. 9 As shown, the above step S11a, i.e., obtaining the first frequency band signal corresponding to all the working frequency bands of the interference device, includes: S11a1, 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 the frequency band corresponding to each transmitting channel, the first sub-frequency band signal of the first preset time length is obtained through the receiving channel in sequence. All the first sub-frequency band signals constitute the first frequency band signal.

[0102] In this embodiment, the working frequency bands of each interference device are the same, and the working frequency band is the same as the frequency band of the transmission channel. If the interference device has only one receiving channel, but there are multiple frequency bands of the transmission channel, that is, there are multiple working frequency bands, therefore, the receiving frequency band of the receiving channel can be switched to be the same as the frequency bands of different transmission channels in different time periods, so that the interference signals corresponding to each working frequency band can be received in turn. When the receiving channel corresponds to the frequency band of a certain transmission channel, if there is already an interference device transmitting an interference signal of the transmission channel frequency band, the interference signal of the transmission channel frequency band transmitted by the turned-on interference device can be received through the receiving channel, and it can be determined that it is not the first interference device. Since the jammer has one receiving channel and multiple transmitting channels, and the transmitting channel used by the jammer that has been enabled for jamming is selected according to the actual jamming scenario, the transmitting channels used in different jamming scenarios will also be different. For example, the jammer that has been enabled for jamming may have only one transmitting channel working, or all transmitting channels may be working, but this is unknown to the jammer that is enabled later. Therefore, the jammer needs to spend several first preset time durations (such as 1.05 seconds) to capture a signal (i.e., the first sub-band signal) for each transmitting channel at the beginning, and all captured first sub-band signals can be combined to obtain a full-band signal, which is the first-band signal. After obtaining the first-band signal, it can be identified whether the jammer has received the jamming signal, thereby determining whether it is the first jammer.

[0103] Among them, there are also multiple situations for the signal category included in the first sub-frequency band signal: if the current interference device is the first interference device, the first sub-frequency band signal received in any working frequency band only has the base station signal, but no interference signal; if the current interference device is not the first interference device, then the first sub-frequency band signal of the corresponding working frequency band, if received in the interference signal output time period, includes both the interference signals output by other interference devices and the base station signal; if received in the interference signal off time period, it only includes the base station signal.

[0104] In one embodiment, if Fig.10 As shown, the above step S11a, i.e., obtaining the first frequency band signal corresponding to all the working frequency bands of the interference device, also includes: S11a2, 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 receiving channels are obtained within a first preset time length, and all the second sub-frequency band signals constitute the first frequency band signal.

[0105] In this embodiment, the frequency bands of the multiple receiving channels are one-to-one identical to the frequency bands of the multiple transmitting channels, that is, each transmitting channel has a corresponding receiving channel. If interference is turned on, all transmitting channels will simultaneously transmit interference signals, and at the same time, signals can be received simultaneously through all receiving channels, so each receiving channel can obtain a second sub-band signal. All second sub-band signals can form a full-band signal (i.e., the first-band signal).

[0106] In this way, since all receiving channels can receive signals of their respective frequency bands at the same time, full-band signals can be obtained by utilizing a first preset duration (eg, 1.05s), which helps to save the capture time of the first frequency band signal and improve the timeliness of interference.

[0107] In other embodiments, that is, if the interference device is equipped with multiple receiving channels and multiple transmitting channels, the corresponding relationship between the transmitting channels can be that the frequency bands of the multiple receiving channels are one-to-one identical to the frequency bands of the multiple transmitting channels, or the frequency band of one receiving channel covers at least the frequency bands of two transmitting channels, or the frequency bands of at least two receiving channels cover the frequency band of one transmitting channel, and there is no limitation on this.

[0108] 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 one after another.

[0109] Optionally, the receiving of the base station signal by the interference device in the above step S21 may specifically include: acquiring base station signals corresponding to all working frequency bands of the interference device.

[0110] Because the shielding of the terminal must ensure that the terminal cannot receive any base station signals. Therefore, after determining that it is the first interference device, the interference device must receive base station signals of all working frequency bands and generate corresponding interference signals based on the received base station signals of all working frequency bands.

[0111] In an optional embodiment, all working frequency bands of the interference device can at least cover the frequency bands of all base station signals in the interference location. The correspondence between each working frequency band and each base station frequency band is not limited in this embodiment, for example: all working frequency bands of the interference device can correspond to the frequency bands of all base station signals one-to-one (i.e., one working frequency band corresponds to one base station signal frequency band), or one-to-many correspondence (i.e., one working frequency band can cover the frequency bands of multiple base station signals), or many-to-one correspondence (i.e., multiple working frequency bands cover the frequency band of one base station signal).

[0112] Optionally, when it is determined that the interfering device is not the first interfering device, the above-mentioned step S32, i.e., receiving the base station signal within the interference signal off time period to generate an interference signal based on the base station signal, may specifically include: receiving the base station signal corresponding to each working frequency band of the interfering device within different interference signal off time periods respectively; generating an interference signal based on the received base station signal.

[0113] After confirming that it is not the first interference device, the non-first interference device also needs to receive base station signals of all working frequency bands. However, since other interference devices have already turned on interference, it cannot receive base station signals at will, but can only receive base station signals of each working frequency band during the interference signal off time period. Since the duration of the interference signal off time period is short, the amount of data of the base station signal obtained using this time period may not be able to fully support the interference. Therefore, in this embodiment, the base station signals of the relevant frequency bands can be received in the interference signal off time period in multiple interference cycles in sequence. Specifically, it can be that only the base station signal corresponding to one working frequency band is obtained in one interference signal off time period; or, it can also be that the base station signals of two or more working frequency bands are obtained in one interference signal off time period; or, it can also be that the base station signal of one working frequency band is received in two or more interference signal off time periods. In general, as long as the base station signals of all working frequency bands can be received, this embodiment does not make specific restrictions on how many interference signal off time periods of the interference cycle are used to receive them.

[0114] Next, Figure 3The embodiment shown illustrates the entire working sequence after the first interference device is turned on. PAOFF indicates the stage in which the interference device stops transmitting interference signals (base station signals can be received in this stage). PA ON indicates that the interference device transmits interference signals. In the several seconds after the power-on, the interference device can first obtain the 1.05-second signal of each working frequency band through the receiving channel (if the specific configuration of the number of channels is as in the above step S11a1, the first sub-band signal of 1.05 seconds of each working frequency band is obtained in sequence; if the specific configuration of the number of channels is as in the above step S11a2, the second sub-band signals of all working frequency bands are obtained within 1.05 seconds), that is, the above-mentioned first frequency band signal, and the first frequency band signal can specifically be the I / Q data obtained by IQ demodulating the received radio frequency signal. Therefore, it can be determined whether there is an interference signal based on the I / Q data. Since it is the first interference device, there is no interference signal in the current environment, so it can be determined that it is the first interference device. Next, the base station signal of each working frequency band can be further obtained, and the base station signal can also be the I / Q data obtained by IQ demodulating the received radio frequency signal. The captured IQ data can be analyzed to obtain the base station information corresponding to each base station. After obtaining the base station information, the interference signal can be generated according to the base station information. Next, the interference can be turned on and switched to the PA ON position. The first interference device first enters the interference signal output time period, that is, continuously transmits the interference signal within a time period of 1000ms, and then enters the interference signal off time period, that is, stops transmitting the interference signal within 24ms, and then enters the interference signal output time period, and then cyclically executes each interference cycle.

[0115] Next, Figure 4The embodiment shown illustrates the working sequence of the non-first interference device. Since it is not the first interference device, there are other interference devices in the surrounding environment that are cyclically executing the interference cycle, including the first interference device. For the non-first interference device, the first is to obtain the 1.05 second signal of each working frequency band, that is, the first frequency band signal mentioned above. The specific acquisition method is the same as that of the first interference device mentioned above, and will not be repeated here. Since other interference devices are already executing the interference cycle at this time, the interference signal can be identified from the first frequency band signal, so that it can be determined that it is not the first interference device. At the same time, the interference signal output time period and the interference signal off time period are identified according to the first frequency band signal, and the interference signal off time period that other interference devices will execute next is calculated. Then, the corresponding base station signal is received in each subsequent interference signal off time period until the base station signal of all working frequency bands is received. After that, the interference signal can be generated according to the received base station signal, and each interference cycle can be cyclically executed like other interference devices (that is, the interference signal is transmitted in the interference signal output time period, and the interference signal is stopped in the interference signal off time period). In order not to affect the interference devices that subsequently re-enter the network, all interference devices that enter the network are required to stop transmitting interference signals during the same interference signal off time period and transmit interference signals during the interference signal output time period, so as to ensure that the interference devices that enter later can obtain accurate and real base station signals during the interference signal off time period.

[0116] Therefore, through the above method, this embodiment can allow all interference devices that are subsequently turned on to use the interference signal off time period to receive the base station signal without being interfered by the interference signals emitted by other interference devices, so that even if multiple interference devices are not started at the same time, they can eventually work synchronously.

[0117] In one embodiment, if Fig.11 As shown, after determining that the interference device is the first interference device, and after the interference device receives the base station signal and generates an interference signal according to the base station signal, for example, the following steps are also performed between step S21 and step S22: S23, receiving the signal in the environment again, and judging whether there is an interference signal in the environment based on the signal in the environment. S24, if there is an interference signal 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 performed (i.e., starting to perform the above steps S31, S32, and S33). S25, if there is no interference signal in the environment, it is determined that the interference device is the first device, and the above step S22 is continued to be performed, that is, the interference signal is emitted in the interference signal output time period, and the interference signal is not emitted in the interference signal off time period. Among them, the execution order of steps S24 and S25 is not limited, for example, they can be executed simultaneously or one after another.

[0118] Specifically, in actual applications, there is a special competition conflict phenomenon, that is, if two newly connected interference devices are turned on almost at the same time (actually there is still a small start-up time difference), then these two interference devices also execute step S1 almost at the same time, regardless of whether it is the first interference device or the interference device turned on later (hereinafter referred to as: pseudo-first interference device), after being turned on, they capture a period of time, such as 1.05 seconds of data (i.e., the first frequency band signal) to determine whether there is an interference signal. Neither of these two interference devices currently receives an interference signal, so after executing step S1, they will both think that they are the first interference device. However, there is a period of time between the interference device executing step S1 and the output of the interference signal itself, such as the time required to generate the interference signal. Therefore, a situation may occur: while the pseudo-first interference device is still generating the interference signal, the real first interference device has begun to transmit the interference signal, but the pseudo-first interference device still thinks that it is the first interference device, and after generating the interference signal, it will still start to execute the interference cycle slightly later than the first interference device. In this way, since the two interference devices start to execute the interference cycle at different times, it will affect the interference signal output time period and the interference signal off time period identified by the subsequently turned-on interference device, that is, all interference devices cannot achieve the synchronization effect. Therefore, it is necessary to compete to confirm who is the real first interference device to avoid the above problem.

[0119] Taking two interference devices A and B, where interference device B is the real first interference device and interference device A is the pseudo-first interference device as an example, when interference device A is receiving signals in the environment (i.e., when executing step S1), interference device B has not yet output an interference signal. Interference device A will determine that it is the first interference device at this time. When interference device A is in the process of generating an interference signal, interference device B has already started to transmit an interference signal. At this time, if interference device A still starts working as the first interference device, interference device A and interference device B will be out of sync and there will be staggered competition conflicts in the interference signal off time period.

[0120] Therefore, when the interference device preliminarily determines that it is the first interference device, the embodiment of the present invention allows the interference device to confirm the signal in the environment again after generating the interference signal and before outputting the interference signal to determine whether there is an interference signal in the environment. When the result of the judgment is that there is already an interference signal in the environment, it means that the current interference device has failed to compete, that is, it means that other interference devices have already transmitted interference signals first, which means that the interference device is actually the interference device that is turned on later among the two interference devices that are turned on almost at the same time. Therefore, the interference device is no longer the first interference device, and will then work according to the process of not being the first interference device, that is, according to steps S31, S32, and S33. When the result of the judgment is that there is still no interference signal in the environment, it means that the current interference device has successfully competed, that is, it means that no other interference device has transmitted interference signals before itself, that is, it means that the interference device is actually the interference device that is turned on earlier among the two devices that are turned on almost at the same time, which means that the interference device is indeed the first interference device, so step S22 can be directly executed.

[0121] On the basis of the above, after receiving the signal in the environment again, the multi-machine synchronous shielding method also includes: transmitting an interference signal during the interference signal output time period.

[0122] That is, before reconfirming whether there is an interference signal, the interference signal obtained in step 21 can be directly transmitted after receiving the signal in the environment again, that is, there is no need to wait for the analysis result of step S23, but the interference can be directly turned on. 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 an interference signal in the environment based on the signal in the environment" in step S23. Alternatively, the step of "transmitting the interference signal obtained in step 21" is executed first, and then the step of "determining whether there is an interference signal in the environment based on the signal in the environment" in step S23 is executed.

[0123] It should be noted that, since the first interference device is also in the interference signal output time period at this time, even if the pseudo first interference device directly transmits the interference signal at this time, it will not cause any impact. In addition, for the real first interference device, since interference can be performed immediately after the interference signal is generated (without waiting for the judgment result of step S23), it is ensured that the interference state can be entered as soon as possible. On the one hand, the response speed of the interference can be improved, and on the other hand, it is ensured that the interference device turned on later (including the pseudo first interference device) can receive the interference signal in time to accurately confirm that the first interference device has turned on the interference, thereby further reducing the competition conflict. After obtaining the analysis results, the corresponding operation is then performed according to the analysis results. For example, when the interference signal is obtained based on the environmental signal, that is, it is determined that the interference device is not the first interference device, the interference signal output can be terminated and steps S31, S32, and S33 can be re-executed. To synchronize with the first interference device.

[0124] Optionally, the above-mentioned step S23 of determining whether there is an interference signal in the environment based on the signal in the environment may specifically include: obtaining a second frequency band signal corresponding to all working frequency bands of the interfering device; if it is determined that the second frequency band signal contains an interference signal, then determining 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 determining that there is no interference signal in the environment.

[0125] That is, in the process of confirming whether it is the real first interference device, the second frequency band signals corresponding to all the working frequency bands of the interference device can be obtained. This is because in the confirmation process, for two interference devices that are turned on almost at the same time, the interference device does not know which working frequency band the real first interference device uses, but because the working frequency band of each interference device is the same, the embodiment of the present invention allows the interference device to obtain the second frequency band signals of all working frequency bands in the process of secondary confirmation of whether it is the first interference device, so that the pseudo-first interference device can use the signals of all working frequency bands to perform the secondary confirmation process, avoiding the risk of incorrect secondary confirmation results due to missing working frequency bands, which is conducive to improving the accuracy of the secondary confirmation of whether it is the first interference device.

[0126] Furthermore, the duration of each working frequency band signal in the second frequency band signal is greater than the duration of the interference signal off time period, and the duration of the second frequency band signal is less than the duration of the first frequency band signal.

[0127] Specifically, since the acquisition of the second frequency band signal is only used to determine whether there is an interference signal, a longer sampling time is not required, and it is not necessary to be at least equal to the sum of the duration of the interference signal output time period and the interference signal off time period as the acquisition duration of the first frequency band signal. Although in the competition risk phenomenon, the two interference devices are turned on almost at the same time, the timing of the pseudo-first interference device acquiring the second frequency band signal may just fall into the interference signal off time period of the real first interference device. Once this risk occurs, the pseudo-first interference device will again mistakenly identify itself as the first interference device, resulting in the failure of avoiding the competition risk phenomenon. In view of this, the embodiment of the present 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 off time period. For example, if the acquisition duration of each working frequency band signal in the first frequency band signal is 1.05s, and the duration of the interference signal off time period is 24ms, then the acquisition duration of each working frequency band signal in the second frequency band signal can be 30ms. In step S23, 30ms of data can be captured for each working frequency band of the interference device through the receiving channel, and whether there is an interference signal can be analyzed based on the 30ms of data. Among them, the method of identifying whether there is an interference signal based on the second frequency band signal can refer to the above-mentioned analysis method for the first frequency band signal. For example, the specific judgment process can be: judging whether the period of the PSS signal in the second frequency band signal is 66.667us. In this way, the second frequency band signal obtained by the pseudo-first interference device will inevitably include an interference signal, thereby avoiding the problem of failure to avoid the competition risk phenomenon due to the timing of the pseudo-first interference device obtaining the second frequency band signal falling in the interference signal off time period of the first interference device, thereby improving the success rate of avoiding the competition risk phenomenon.

[0128] Next reference Fig.12 , the entire workflow of confirming the first interference device twice is explained. The interference device first obtains the first frequency band signal of all working frequency bands, where the signal of each working frequency band can be at least 1.05 seconds of IQ data. The first frequency band signal is identified. At this time, there is no interference signal emitted by other interference devices in the environment, so it is determined to be the first interference device. Next, continue to obtain the base station signal of each working frequency band, and then generate an interference signal based on the base station signal. Then reconfirm, that is, obtain the second frequency band signal of all working frequency bands again, and the overall acquisition time of the second frequency band signal is shorter than the first frequency band signal, so as to identify again whether there is an interference signal in the current environment. If not, it means that there is no competition conflict, then it is finally confirmed that it is the first interference device, after which the interference can be turned on and each interference cycle is executed cyclically.

[0129] For the pseudo first interference device, after obtaining the second frequency band signal of all working frequency bands and the previous timing and Fig.12The difference is that when it is determined that it is not the first interference device based on the second frequency band signal, it will follow Figure 4 The timing shown first identifies the interference signal off time period and the interference signal output time period based on the received interference signal, then receives the base station signal in each interference signal off time period, generates the interference signal based on the base station signal, and finally cyclically executes the subsequent interference cycles.

[0130] Optionally, in one embodiment of the multi-machine synchronous shielding method of the present invention, it also includes: S4, when it is determined that the interference device is the first interference device, the interference device receives the base station signal during the interference signal off time period, and calibrates the interference signal according to the received base station signal.

[0131] In step S4 of this embodiment, Figure 1 In the embodiment shown, step S21 is performed after that, or in the above Fig.11 The step S25 in the illustrated embodiment is executed after that. That is, after the first interference device turns on the interference, the base station signal can continue to be received during the interference signal off time period, and the clock deviation of the interference device can be corrected according to the base station signal to ensure that the interference signal and the base station signal timing are always consistent. The specific process of adjustment can be: at least part of the synchronization signal in the interference signal must be sent at the same time as the synchronization signal in the base station signal 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 synchronization signal obtained again this time is compared with the time domain position of the synchronization signal determined according to the local clock in the last generation of the interference signal, which is the same as the base station sending time, to obtain the difference in the time domain positions of the two synchronization signals. According to the difference, the signal is offset so that the timing of the interference signal and the base station signal is realigned, thereby realizing the calibration of the interference signal.

[0132] It should be noted that the first interference device can receive the base station signal for calibration during the interference signal off time period in each interference cycle, or it can perform calibration every several interference cycles, all of which are within the protection scope of this application.

[0133] Optionally, in one embodiment of the multi-machine synchronous shielding method of the present invention, it also includes: S5 when the interference device is not the first interference device, after transmitting the interference signal in the interference signal output time period, the interference device receives the base station signal in the interference signal off time period, and calibrates the interference signal according to the base station signal.

[0134] In step S5 of this embodiment, Figure 1 In the embodiment shown, step S32 is performed after that, or in the above Fig.11Executed after step S32 in the illustrated embodiment. Similarly, when the interfering device is not the first interfering device, the interference signal can also be calibrated by receiving the base station signal during the interference signal off time period after the interference is turned on. The specific process of adjustment can be to re-receive the base station signal, calculate the time domain position of the synchronization signal in the base station signal re-received this time, and then compare the time domain position of the re-obtained synchronization signal with the time domain position of the synchronization signal determined according to the local clock in the last interference signal generation process to obtain the difference in the time domain positions of the two synchronization signals. The signal is offset based on the difference so that the timing of the interference signal and the base station signal is realigned.

[0135] It should be noted that non-first interference devices can receive base station signals for calibration during the interference signal off time period in each interference cycle, or can perform calibration every few interference cycles, all of which are within the protection scope of this application.

[0136] It can be understood that all interference devices receive the same base station signal during the interference signal off time period, so the calibration effect of the interference signal based on the same base station signal is also the same, and ultimately it can ensure that the interference signals emitted by all interference devices can be aligned with the timing of the same base station signal. And by using the synchronized interference signal off time period to calibrate the interference signal, there is no need to set an additional separate time period for the calibration operation, thereby avoiding interrupting the interference for too long, which is conducive to ensuring the interference effect.

[0137] Another embodiment of the present invention proposes a multi-machine shielding system, including: multiple interference devices. Wherein, when any interference device is determined to be the first interference device, the following steps are performed: the interference device receives the base station signal and generates an interference signal according to the base station signal; transmits the interference signal in the interference signal output time period, and does not transmit the interference signal in the interference signal off time period. When any interference device is determined not to be the first interference device, the following steps are performed: the interference device obtains the interference signal off time period and the interference signal output time period according to the received signal; receives the base station signal in the interference signal off time period to generate an interference signal according to the base station signal; transmits the interference signal in the interference signal output time period, and does not transmit the interference signal in the interference signal off time period.

[0138] That is, a multi-machine shielding system is constructed through multiple interference devices. Each interference device will determine whether it is the first interference device before officially starting the interference, and execute the corresponding steps according to the confirmation result. The specific process can refer to the specific steps of a multi-machine synchronous shielding method mentioned above, which will not be repeated here.

[0139] In addition, another embodiment of the present invention provides an electronic device, which may also 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 above methods. Specifically, according to an embodiment of the present invention, the process described with reference to the flowchart above can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed by an electronic device and when executed, it performs the above functions defined in the method of the embodiment of the present invention. The electronic device in the present invention can be a terminal such as a notebook, a desktop, a tablet computer, a smart phone, or a server.

[0140] In addition, another embodiment of the present invention provides a computer storage medium, on which a computer program is stored, and when the computer program is executed by a processor, any of the above methods is implemented. Specifically, it should be noted that the above-mentioned computer-readable medium of the present invention may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device. In the present invention, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0141] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0142] In addition, another embodiment of the present invention provides a computer program product, on which a computer program is stored, and when the computer program is executed by a processor, any one of the above methods is implemented.

[0143] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A multi-machine synchronous shielding method, characterized in that: The multi-machine synchronous shielding method comprises: Determining whether the interference device is a first interference device, wherein the first interference device is an interference device that first transmits an interference signal; When it is determined that the interfering device is the first interfering device, the following steps are performed: The interference device receives a base station signal and generates an interference signal according to the base station signal; transmitting the interference signal during the interference signal output time period, and not transmitting the interference signal during the interference signal off time period; When it is determined that the interfering device is not the first interfering device, the following steps are performed: The interference device obtains the interference signal off time period and interference signal output time period of other interference devices that have started interference according to the received signal; receiving the base station signal within the interference signal off time period to generate the interference signal according to the base station signal; The interference signal is transmitted during the interference signal output time period, and the interference signal is not transmitted during the interference signal off time period.

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

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

4. The multi-machine synchronous shielding method according to claim 3, characterized in that: The determining, according to the first frequency band signal, whether the interference device has received the interference signal comprises: Acquire characteristics of a synchronization signal in the first frequency band signal; When the characteristic of the synchronization signal is a first preset characteristic, determining that the interference device receives the interference signal; When the characteristic of the synchronization signal is not the first preset characteristic, 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 acquiring of the first frequency band signal corresponding to all the working frequency bands of the interference device includes: If the interference device includes one receiving channel and multiple transmitting channels, and the frequency band corresponding to each transmitting channel is the same as one of the working frequency bands, for the frequency bands corresponding to the transmitting channels, first sub-frequency band signals of a first preset time length are acquired respectively through the receiving channels in sequence; 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 of the transmitting channels is the same as one of the working frequency bands, the second sub-frequency band signals received by all the receiving channels are obtained within a first preset time length, and all the second sub-frequency band signals constitute the first frequency band signal; The first preset duration is greater than or equal to the sum of the durations of the interference signal off time period and the interference signal output time 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 the interfering device receives a base station signal and generates an interfering signal according to the base station signal, the method further includes: Receiving the signal in the environment again, and judging whether the interference signal exists in the environment according to the signal in the environment; If the interference signal exists in the environment, determining that the interference device is not the first interference device, and executing the subsequent steps of the method for determining that the interference device is not the first device; If the interference signal does not exist in the environment, the interference device is determined to be the first device, and the interference signal is continuously transmitted during the interference signal output time period, and the interference signal is not transmitted during the interference signal off time period.

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

8. The multi-machine synchronous shielding method according to claim 6, characterized in that: The determining, based on the signal in the environment, whether the interference signal exists in the environment includes: Acquire a second frequency band signal corresponding to all working frequency bands of the interference device; If it is determined that the second frequency band signal includes the interference signal, then determining that the interference signal exists in the environment; If it is determined that the second frequency band signal does not include the interference signal, 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 determining whether the interfering device is the first interfering device includes: Acquire a first frequency band signal corresponding to all working frequency bands of the interference device; Determine whether the interference device receives the interference signal according to the first frequency band signal; If the interference device receives the interference signal, it is determined that the interference device is not the first interference device; if the interference device does not receive the interference signal, it is determined that the interference device is the first interference device; The duration of the signal of each working frequency band in the second frequency band signal is greater than the duration of the interference signal off time 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 receiving the base station signal includes: The interference device receives base station signals corresponding to all working frequency bands; and / or, When it is determined that the interfering device is not the first interfering device, receiving the base station signal within the interference signal off time period to generate the interference signal according to the base station signal, including: Receiving base station signals corresponding to each working frequency band of the interference device in different interference signal off time periods respectively; The interference signal is generated according to the received base station signal.

11. The multi-machine synchronous shielding method according to any one of claims 1 to 10, characterized in that: The multi-machine synchronous shielding method also includes: When it is determined that the interference device is the first interference device, the interference device receives a base station signal during an interference signal off time period, and calibrates the interference signal according to the received base station signal; And / or, when the interference device is not the first interference device, after transmitting the interference signal in the interference signal output time period, the interference device receives the base station signal in the interference signal off time period and calibrates the interference signal according to the base station signal.

12. A multi-machine shielding system, characterized in that: include: Multiple jamming devices; Wherein, when any of the interference devices is determined to be the first interference device, the following steps are performed: The interference device receives a base station signal and generates an interference signal according to the base station signal; transmitting the interference signal during the interference signal output time period, and not transmitting the interference signal during the interference signal off time period; When any of the interference devices is determined not to be the first interference device, the following steps are performed: The interference device obtains the interference signal off time period and interference signal output time period of other interference devices that have started interference according to the received signal; receiving the base station signal within the interference signal off time period to generate the interference signal according to the base station signal; The interference signal is transmitted during the interference signal output time period, and the interference signal is not transmitted during the interference signal off time period.

13. An electronic device, characterized in that: The electronic device comprises a memory and a processor; The memory is used to store computer programs; The processor is configured to execute the computer program to implement the method according to any one of claims 1 to 11.

14. A computer storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 11 is implemented.

15. A computer program product, characterized in that The method comprises a computer program; the computer program is executed by a processor to implement the method according to any one of claims 1 to 11.

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