CN110958075A

CN110958075A - Signal shielding method, system, readable storage medium and device

Info

Publication number: CN110958075A
Application number: CN201911218568.XA
Authority: CN
Inventors: 曹永福; 洪攀峰; 王勇; 袁勇超; 胡磊; 王玮
Original assignee: Zhejiang Sunwave Communications Technology Co Ltd
Current assignee: Zhejiang Sunwave Communications Technology Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-04-03
Anticipated expiration: 2039-12-03
Also published as: CN110958075B

Abstract

The invention relates to a signal shielding method, a system, a readable storage medium and a device, wherein in a time slot for receiving a base station signal in a shielding system, a base station frame can be received, the occupancy rate of a user signal resource in the base station frame is obtained from the base station frame, if the occupancy rate is smaller than the occupancy rate of the user signal resource in a pre-stored signal frame, the user signal in the current base station frame is less or does not exist, the pre-stored signal frame is used for generating a shielding frame, the occupancy rate of the user signal resource in the pre-stored signal frame in the shielding frame is high, the signal shielding is carried out by transmitting the shielding frame, when the base station does not transmit user data, the whole carrier signal of the base station can be shielded, even if the signal transmitted by the base station contains the user data, the signal shielding effect can be realized, and the problem of the failure of a shielding part.

Description

Signal shielding method, system, readable storage medium and device

Technical Field

The present invention relates to the field of signal processing technologies, and in particular, to a signal shielding method, a signal shielding system, a readable storage medium, and a device.

Background

With the continuous development of communication technology, communication signals cover almost all areas of life. For some specific places, there is a need to shield communication signals, such as various examination rooms, courtrooms, hospitals, heavy military places, etc., and signal shielding devices are usually erected at the places where signal shielding is needed to block normal communication of the communication network in a specific area.

In a conventional communication system (e.g., an LTE (Long Term Evolution) system), Cell Reference Signals (CRS) are distributed on a whole Broadcast Control Channel (BCCH) carrier, and the Broadcast control channel carrier may be continuously transmitted, so that when (store-and-forward) masking is performed, a corresponding Cell Reference Signal is also contained in a masked frame and is also continuously transmitted, so that any sampled frame is equivalent;

with the continuous development of 5G communication technology, a corresponding communication system is continuously changed, wherein 5G introduces a MIMO (Multiple-Input Multiple-Output) technology, a plurality of transmitting antennas and receiving antennas are respectively used at a transmitting end and a receiving end, signals are transmitted and received through the plurality of antennas at the transmitting end and the receiving end, and a user Reference Signal (DRS) is used to replace a cell Reference Signal in the LTE system.

In the process of implementing the technical scheme of the invention, the inventor finds that the following problems exist in the traditional technology: under the condition of using the user reference signal, if no user data is transmitted, no user reference signal is transmitted, and if a corresponding signal frame is acquired during shielding, no user reference signal and no user signal exist, and the shielding can be partially invalid.

Disclosure of Invention

Based on this, it is necessary to provide a signal shielding method, system, readable storage medium and device for solving the problem that the shielding part fails when the user reference signal is used in the conventional manner.

A signal masking method, comprising the steps of:

receiving a base station frame in a time slot of a shielding system for receiving a base station signal;

acquiring the occupancy rate of user signal resources in a base station frame, and if the occupancy rate of the user signal resources in the base station frame is less than the occupancy rate of the user signal resources in a pre-stored signal frame, generating a shielding frame according to the pre-stored signal frame;

and transmitting the shielding frame in the time slot of the shielding system for transmitting the shielding signal.

According to the signal shielding method, the shielding system receives the base station signal first, generates and transmits the shielding signal according to the base station signal, the shielding signal can shield the base station signal from being received by the terminal device, the base station frame can be received in the time slot of the shielding system for receiving the base station signal, the occupancy rate of the user signal resource in the base station frame is obtained from the base station frame, if the occupancy rate is smaller than the occupancy rate of the user signal resource in the pre-stored signal frame, the user signal in the current base station frame is less or not existed, the shielding frame is generated by utilizing the pre-stored signal frame, the occupancy rate of the user signal resource in the shielding frame in the pre-stored signal frame is high, the signal shielding is carried out by transmitting the shielding frame, when the base station does not transmit the user data, the whole carrier signal of the base station can be shielded, even if the signal transmitted by the base station contains the, the problem of shielding part failure in practical application is solved.

In one embodiment, before the step of generating the mask frame according to the pre-stored signal frame, the method further comprises the following steps:

and receiving the base station frames for multiple times, respectively acquiring the occupancy rates of corresponding user signal resources according to the plurality of base station frames, and taking the base station frame with the maximum occupancy rate as a pre-stored signal frame.

In one embodiment, after the step of obtaining the occupancy rate of the user signal resource in the base station frame according to the base station frame, the method further includes the following steps:

and if the occupancy rate of the user signal resources in the base station frame is greater than the occupancy rate of the user signal resources in the signal frame, generating a shielding frame according to the base station frame.

In one embodiment, the signal masking method further comprises the steps of:

and if the occupancy rate of the user signal resources in the base station frame is greater than the occupancy rate of the user signal resources in the signal frame, replacing the signal frame with the base station frame.

In one embodiment, the step of obtaining the occupancy rate of the user signal resource in the base station frame comprises the following steps:

the method comprises the steps of obtaining the power of a system common reference signal of a base station frame, taking the incidence relation between the system common reference signal and the power of the system common reference signal as a reference standard, obtaining the power of user signal resources in a corresponding base station frame according to the reference standard, and obtaining the occupancy rate of the user signal resources in the base station frame according to the power of the user signal resources in the base station frame and the power of the system common reference signal.

In one embodiment, the step of replacing the signal frame with the base station frame comprises the steps of:

splitting user signal resources in a base station frame into a plurality of base station frame time domain segments, and splitting the user signal resources in the signal frame into a plurality of signal frame time domain segments, wherein each base station frame time domain segment corresponds to each signal frame time domain segment one to one;

traversing and comparing each base station frame time domain segment with each corresponding signal frame time domain segment, and replacing the corresponding signal frame time domain segment with the base station frame time domain segment if the power of the base station frame time domain segment is greater than that of the corresponding signal frame time domain segment;

and after the traversal is finished, obtaining the updated pre-stored signal frame.

splitting user signal resources in a base station frame into a plurality of base station frame frequency domain segments, and splitting the user signal resources in the signal frame into a plurality of signal frame frequency domain segments, wherein each base station frame frequency domain segment corresponds to each signal frame frequency domain segment one to one;

traversing and comparing each base station frame frequency domain segment with each corresponding signal frame frequency domain segment, and if the power of the base station frame frequency domain segment is greater than that of the corresponding signal frame frequency domain segment, replacing the corresponding signal frame frequency domain segment with the base station frame frequency domain segment;

splitting user signal resources in a base station frame into a plurality of base station frame resource blocks, and splitting the user signal resources in the signal frame into a plurality of signal frame resource blocks, wherein each base station frame resource block corresponds to each signal frame resource block one to one;

traversing and comparing each base station frame resource block with each corresponding signal frame resource block, and replacing the corresponding signal frame resource block with the base station frame resource block if the power of the base station frame resource block is greater than that of the corresponding signal frame resource block;

In one embodiment, the signal masking method further comprises the steps of:

detecting whether the base station reference data of the base station frame is consistent with the base station reference data of the signal frame, and if not, replacing the signal frame with the base station frame;

or;

and after the preset time, re-receiving the plurality of base station frames, respectively acquiring the occupancy rates of the corresponding user signal resources according to the plurality of new base station frames, and replacing the signal frames with the new base station frames with the maximum occupancy rates.

In one embodiment, the step of generating the mask frame from the pre-stored signal frame comprises the steps of:

respectively generating corresponding shielding frames aiming at base station frames with different frequencies;

or generating a combined mask frame according to the corresponding signal frames for the base station frames with different frequencies.

In one embodiment, the step of generating the mask frame according to the pre-stored user signal resource comprises the steps of:

acquiring a user reference signal and a system common reference signal of a base station frame;

and generating a shielding frame according to the user signal resource, the user reference signal and the system common reference signal in the signal frame.

A signal shielding system, comprising:

the signal receiving unit is used for receiving a base station frame in a time slot of a shielding system for receiving a base station signal;

the device comprises a shielding frame processing unit, a signal frame processing unit and a signal frame processing unit, wherein the shielding frame processing unit is used for acquiring the occupancy rate of user signal resources in a base station frame, and generating a shielding frame according to a pre-stored signal frame if the occupancy rate of the user signal resources in the base station frame is less than the occupancy rate of the user signal resources in the pre-stored signal frame;

and the signal transmitting unit is used for transmitting the shielding frame in the time slot of the shielding signal transmitted by the shielding system.

According to the above-mentioned signal shielding system, which comprises a signal receiving unit, a shielding frame processing unit and a signal transmitting unit, the shielding system receives the base station signal first, generates and transmits a shielding signal according to the base station signal, the shielding signal can shield the base station signal from being received by the terminal equipment, the signal receiving unit is used for receiving the time slot of the base station signal in the shielding system and can receive the base station frame, the shielding frame processing unit is used for obtaining the occupancy rate of the user signal resource in the base station frame from the shielding signal, if the occupancy rate is less than the occupancy rate of the user signal resource in the pre-stored signal frame, it indicates that the user signal in the current base station frame is less or not present, the shielding frame is generated by using the pre-stored signal frame, the occupancy rate of the user signal resource in the shielding frame in the pre-stored signal frame is high, the signal, when the base station does not transmit user data, the whole carrier signal of the base station can be shielded, even if the signal transmitted by the base station contains the user data, the signal shielding effect can be realized, and the problem that the shielding part fails in practical application is solved.

In one embodiment, the signal receiving unit is further configured to receive the base station frames multiple times, and the mask frame processing unit is further configured to obtain the occupancy rates of the corresponding user signal resources according to the multiple base station frames, and use the base station frame with the largest occupancy rate as the pre-stored signal frame.

In one embodiment, the mask frame processing unit is further configured to generate a mask frame according to the base station frame when the occupancy rate of the user signal resource in the base station frame is greater than the occupancy rate of the user signal resource in the signal frame.

In one embodiment, the mask frame processing unit is further configured to replace the signal frame with the base station frame when the occupancy rate of the user signal resource in the base station frame is greater than the occupancy rate of the user signal resource in the signal frame.

In one embodiment, the mask frame processing unit is further configured to obtain power of a system common reference signal of the base station frame, use an association relationship between the system common reference signal and the power thereof as a reference, obtain power of a user signal resource in a corresponding base station frame according to the reference, and obtain an occupancy rate of the user signal resource in the base station frame according to the power of the user signal resource in the base station frame and the power of the system common reference signal.

In one embodiment, the mask frame processing unit is further configured to split the user signal resource in the base station frame into a plurality of base station frame time domain segments, and split the user signal resource in the signal frame into a plurality of signal frame time domain segments; traversing and comparing each base station frame time domain segment with each corresponding signal frame time domain segment, and replacing the corresponding signal frame time domain segment with the base station frame time domain segment if the power of the base station frame time domain segment is greater than that of the corresponding signal frame time domain segment; after traversing is finished, obtaining an updated pre-stored signal frame; and the time domain segments of the frames of the base stations correspond to the time domain segments of the frames of the signals one by one.

In one embodiment, the mask frame processing unit is further configured to split user signal resources in the base station frame into a plurality of base station frame frequency domain segments, and split user signal resources in the signal frame into a plurality of signal frame frequency domain segments; traversing and comparing each base station frame frequency domain segment with each corresponding signal frame frequency domain segment, and if the power of the base station frame frequency domain segment is greater than that of the corresponding signal frame frequency domain segment, replacing the corresponding signal frame frequency domain segment with the base station frame frequency domain segment; after traversing is finished, obtaining an updated pre-stored signal frame; and the frequency domain segments of the frames of the base stations correspond to the frequency domain segments of the frames of the signals one by one.

In one embodiment, the mask frame processing unit is further configured to split the user signal resource in the base station frame into a plurality of base station frame resource blocks, and split the user signal resource in the signal frame into a plurality of signal frame resource blocks; traversing and comparing each base station frame resource block with each corresponding signal frame resource block, and replacing the corresponding signal frame resource block with the base station frame resource block if the power of the base station frame resource block is greater than that of the corresponding signal frame resource block; after traversing is finished, obtaining an updated pre-stored signal frame; and each base station frame resource block corresponds to each signal frame resource block one to one.

In one embodiment, the mask frame processing unit is further configured to detect whether base station reference data of the base station frame and base station reference data of the signal frame are consistent, and if not, replace the signal frame with the base station frame;

or;

the signal receiving unit is also used for receiving a plurality of base station frames again after the preset time;

the mask frame processing unit is also used for respectively acquiring the occupancy rates of the corresponding user signal resources according to the plurality of new base station frames and replacing the signal frames with the new base station frames with the maximum occupancy rates.

In one embodiment, the mask frame processing unit is further configured to generate corresponding mask frames for base station frames of different frequencies, respectively; or generating a combined mask frame according to the corresponding signal frames for the base station frames with different frequencies.

In one embodiment, the mask frame processing unit is further configured to obtain a user reference signal and a system common reference signal of the base station frame; and generating a shielding frame according to the user signal resource, the user reference signal and the system common reference signal in the signal frame.

A readable storage medium having stored thereon an executable program which, when executed by a processor, performs the steps of the signal masking method described above.

The readable storage medium can realize that when the user signal in the current base station frame is less or does not exist, the shield frame is generated by utilizing the pre-stored signal frame, the occupancy rate of the user signal resource in the shield frame in the pre-stored signal frame is high, the signal shielding is carried out by transmitting the shield frame, when the base station does not transmit the user data, the whole carrier signal of the base station can be shielded, even if the signal transmitted by the base station contains the user data, the signal shielding effect can be realized, and the problem of shielding part failure in practical application is solved.

A signal shielding device comprises a memory and a processor, wherein the memory stores an executable program, and the processor realizes the steps of the signal shielding method when executing the executable program.

The signal shielding device can generate the shielding frame by utilizing the pre-stored signal frame when the user signal in the current base station frame is less or does not exist by running the executable program on the processor, the occupancy rate of the user signal resource in the shielding frame in the pre-stored signal frame is high, the signal shielding is carried out by transmitting the shielding frame, the whole carrier signal of the base station can be shielded when the base station does not transmit the user data, the signal shielding effect can be realized even if the signal transmitted by the base station contains the user data, and the problem of the failure of the shielding part in the practical application is solved.

Drawings

FIG. 1 is a schematic flow chart diagram of a signal masking method in one embodiment;

FIG. 2 is a schematic diagram of a shielding system in one embodiment;

FIG. 3 is a timing diagram illustrating operation of the system in one embodiment;

fig. 4 is a schematic structural diagram of a signal shielding system in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It should be noted that the term "first \ second" referred to in the embodiments of the present invention is only used for distinguishing similar objects, and does not represent a specific ordering for the objects, and it should be understood that "first \ second" may exchange a specific order or sequence order if allowed. It should be understood that "first \ second" distinct objects may be interchanged under appropriate circumstances such that embodiments of the invention described herein may be practiced in sequences other than those illustrated or described herein.

The terms "comprises" and "comprising," and any variations thereof, of embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or (module) elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The signal shielding method provided by the application can be applied to signal shielding equipment capable of receiving base station signals and is used for shielding communication signals between a base station and a terminal.

Fig. 1 is a schematic flow chart of a signal masking method according to an embodiment of the present invention. The signal shielding method in this embodiment includes the steps of:

step S110: receiving a base station frame in a time slot of a shielding system for receiving a base station signal;

in this step, the shielding system may be a system that uses a store-and-forward manner to shield the communication signal, and during the working process, the shielding system first receives the base station signal, generates a shielding signal according to the base station signal, and transmits the shielding signal for shielding the base station signal; therefore, the shielding system has a time slot for receiving the base station signal and a time slot for transmitting the shielding signal, and the two time slots are not overlapped; the base station signal can comprise a base station frame of a plurality of base stations, an antenna can be arranged in the shielding system, and the base station signal in the spatial environment can be received through the antenna;

step S120: acquiring the occupancy rate of user signal resources in a base station frame, and if the occupancy rate of the user signal resources in the base station frame is less than the occupancy rate of the user signal resources in a pre-stored signal frame, generating a shielding frame according to the pre-stored signal frame;

in this step, the base station frame is in the form of signal frame, which contains multiple signal resources, such as system common signal resources (frame header information, check code, channel information, etc.), user signal resources (such as user service information, user personal information, etc.), after obtaining the base station frame, the base station frame is analyzed and detected to obtain the user signal resources, according to the data amount of the user signal resources and the data amount of the whole base station frame, the occupancy rate of the user signal resources in the base station frame can be obtained, the greater the user signal amount, the greater the occupancy rate, the occupancy rate is compared with the preset occupancy rate of the user signal resources in the signal frame, if the occupancy rate is less than the preset occupancy rate of the user signal resources in the signal frame, it indicates that the user signal resources in the current base station frame are less or not present, at this time, the shielding part may be failed due to the storing and forwarding of the base station frame, so that the shielding frame is generated by using the signal frame stored in advance, and the shielding can be performed even if the user signal happens in the process of transmitting the signal by the base station.

Step S130: and transmitting the shielding frame in the time slot of the shielding system for transmitting the shielding signal.

In this step, in the time slot for transmitting the shielding signal, the signal transmitting device is used to transmit the shielding frame, and the time slot boundary for receiving the base station signal can be aligned with the time slot boundary for transmitting the shielding signal, so that the terminal for receiving the base station signal can receive the shielding signal and the normal base station signal, and the shielding signal is aligned with the normal base station signal in the frame, which can generate interference to the terminal for receiving the normal base station signal, thereby achieving the purpose of signal shielding.

In this embodiment, the masking system first receives a base station signal, generates and transmits a masking signal according to the base station signal, the masking signal mixes the base station signal to be received by the terminal device, in a time slot in which the masking system receives the base station signal, the base station frame may be received, from which the occupancy rate of the user signal resource in the base station frame is obtained, if the occupancy rate is smaller than the occupancy rate of the user signal resource in the pre-stored signal frame, it indicates that the user signal in the current base station frame is less or not present, the masking frame is generated using the pre-stored signal frame, the occupancy rate of the user signal resource in the pre-stored signal frame is high, the signal masking is performed by transmitting the masking frame, when the base station does not transmit the user data, the entire carrier signal of the base station may be masked, even if the signal transmitted by the base station includes the user data, the signal masking, the problem of shielding part failure in practical application is solved.

Further, the time slot in which the masking system receives the base station signal and the time slot in which the masking system transmits the masking signal may be the time slot of the masking system within a masking period.

Further, the time slot for receiving the base station signal by the masking system and the time slot for transmitting the masking signal by the masking system may be the time slot of the same masking period in one masking period by the masking system.

It should be noted that the signal shielding method may be applied to different communication technologies such as 3G, 4G, and 5G, and especially when the 5G communication uses the user reference signal, the whole carrier shielding effect is obvious. The time slot of the shielding system for receiving the base station signal and the time slot of the shielding system for transmitting the shielding signal are not limited to the same shielding period, the shielding system in a common fixed place basically stably receives the base station signal and also basically stably transmits the shielding signal, and the comparability of the base station signal and the shielding signal in the same shielding period is better by considering that the transmitting power of the base station fluctuates along with time. A masking period, i.e. the number of frame periods for receiving and forwarding, for example, the frame duration is 10 ms, the number of forwarding frames is 99 times, and the masking period is 1 second; a masking period may be understood as a greater number of masking cycles.

In one embodiment, before the step of generating the mask frame from the pre-stored signal frame, the method further comprises the steps of:

In this embodiment, before generating the mask frame, the base station frame may be received multiple times, and the base station frame with the largest occupancy rate may be used as the pre-stored signal frame according to the occupancy rate of the corresponding user signal resource, so that the change of the base station frame with the user traffic may be adapted, so as to generate the mask frame by the base station frame with the largest occupancy rate, and further avoid the occurrence of the situation of the failure of the mask portion.

Further, multiple times of receiving base station frames are executed before receiving the current base station frame, and the base station frame with the largest occupancy rate can be obtained through comparison; in order to adapt to the change of the signal in real time, the base station frame with the maximum occupancy rate can be continuously acquired during the operation of the shielding system, so as to ensure that the user signal resource of the stored signal frame has the maximum occupancy rate at all times.

In one embodiment, after the step of obtaining the occupancy rate of the user signal resource in the base station frame according to the base station frame, the method further comprises the following steps:

In this embodiment, since the capacity of the signal frame is generally limited, if the occupancy rate of the user signal resource in the base station frame is greater than the occupancy rate of the user signal resource in the signal frame, it indicates that the user signal resource in the currently received base station frame is more than the user signal resource in the pre-stored signal frame, so that the base station frame can be directly used to generate the mask frame to ensure that the current base station signal can be effectively masked.

In one embodiment, the signal masking method further comprises the steps of:

In this embodiment, if the occupancy rate of the user signal resource in the base station frame is greater than the occupancy rate of the user signal resource in the signal frame, which indicates that the user signal resource in the currently received base station frame is more than the user signal resource in the pre-stored signal frame, the base station frame may be used to replace the signal frame, so as to update the pre-stored signal frame, and keep the occupancy rate of the user signal resource in the pre-stored signal frame at the maximum, so that it is not necessary to continuously compare the base station frame received for many times, and it is only necessary to compare the occupancy rate of the user signal resource in the current base station signal frame with the occupancy rate of the user signal resource in the pre-stored signal frame, thereby reducing the operation complexity and improving the shielding processing efficiency.

In this embodiment, the system common reference signal of the base station frame always exists, and the power of the system common reference signal generally does not fluctuate too much, so that the power of the system common reference signal can be conveniently calculated, the association relationship between the system common reference signal and the power of the system common reference signal is used as a reference, the system common reference signal can be determined from the base station frame, the remaining signals are user signal resources, the power of the user signal resources in the base station frame can be obtained through power detection, the occupancy rate of the user signal resources in the base station frame is determined by using the power relationship between the user signal resources and the system common reference signal, and the occupancy rate of the user signal resources in the base station frame can be more accurately determined by detecting the power.

traversing and comparing each base station frame time domain segment with each corresponding signal frame time domain segment, and if the power of the base station frame time domain segment is greater than that of the corresponding signal frame time domain segment, replacing the corresponding signal frame frequency domain segment with the base station frame frequency domain segment;

In this embodiment, when replacing a pre-stored signal frame, time domain splitting may be performed on a user signal resource to obtain a plurality of time domain segments; the user signal resources in the base station frame are split to obtain base station frame time domain segments, the user signal resources of the pre-stored signal frame are split to obtain signal frame time domain segments, although the user signal resources of the two are distributed differently in the time domain, the user signal resources can be represented by reference quantization data in the time domain without signal distribution, the user signal resources can correspond to the signal frame time domain segments in the whole time domain of the frame one by one, the power of the base station frame time domain segments and the signal frame time domain segments in a certain time domain is judged through traversal comparison, the time domain segments with larger power are selected to realize the replacement of the time domain segments, after the traversal is finished, the finally selected time domain segments in the whole time domain are spliced to obtain updated signal frames, and the updated signal frames are stored to serve as the updated pre-stored signal frames, so that the user signal resources of the pre-stored.

splitting user signal resources in a base station frame into a plurality of base station frame frequency domain segments, and splitting a pre-stored signal frame into a plurality of signal frame frequency domain segments, wherein each base station frame frequency domain segment corresponds to each signal frame frequency domain segment one to one;

In this embodiment, when replacing a pre-stored signal frame, frequency domain splitting may be performed on a user signal resource to obtain a plurality of frequency domain segments; the method comprises the steps that user signal resources in a base station frame are split to obtain base station frame frequency domain segments, the user signal resources of a pre-stored signal frame are split to obtain signal frame frequency domain segments, although the distribution of the user signal resources of the base station frame and the pre-stored signal frame is different in frequency domain, the user signal resources can be represented by reference quantization data in a frequency domain without signal distribution, the user signal resources can correspond to the signal frame frequency domain segments in the whole frequency domain of the frame one by one, the power of the base station frame frequency domain segments and the power of the signal frame frequency domain segments in a certain frequency domain are judged through traversal comparison, the frequency domain segments with larger power are selected, replacement of the frequency domain segments is achieved, after traversal is finished, the finally selected frequency domain segments in the whole frequency domain are spliced to obtain updated signal frames, the updated signal frames are stored and serve as the updated pre.

In this embodiment, when replacing a pre-stored signal frame, a user signal resource may be split to obtain a plurality of resource blocks; the user signal resource in the base station frame is split to obtain a base station frame resource block, the user signal resource of the pre-stored signal frame is split to obtain a signal frame resource block, although the user signal resource distribution of the base station frame and the signal frame resource block is different, the user signal resource distribution can be represented by a reference quantized data resource block in a resource domain without signal distribution, the reference quantized data resource block can correspond to the whole resource region of the frame one by one, the power of the base station frame resource block and the signal frame resource block at a certain position is judged through traversal comparison, the resource block with larger power is selected to realize the replacement of the resource block, after the traversal is finished, the finally selected resource block on the whole resource region is spliced to obtain an updated signal frame and is stored to be used as the updated pre-stored signal frame, so that the user signal resource of the pre-stored signal frame.

Further, the resource blocks may be divided according to data categories, or may be divided according to time domains or frequency domains.

In one embodiment, the signal masking method further comprises the steps of:

or;

In this embodiment, the base station frame has base station reference data, which is used to indicate basic attributes of the base station frame, such as level, cell code, beam number, carrier-to-interference ratio variation, and the like, and may represent a category of the current base station frame, and when the base station reference data of the base station frame and the base station reference data of the signal frame are inconsistent, it indicates that parameters of the pre-stored signal frame and the current base station frame are different, and at this time, it may not be possible to effectively shield the base station signal, so the base station frame may be used as the signal frame; or, after a preset time, the signal frame is automatically updated, that is, a plurality of base station frames are received again, a new base station frame with the largest occupancy rate of user signal resources is selected as the signal frame, and the updating of the signal frame is performed, so that the shielding system can be prevented from being influenced by external interference and the like.

In this embodiment, the base station frames received by the shielding system have various different frequencies, in practical application, a plurality of cells with different frequencies exist in the same frequency band, the communication frequencies adopted by different communication operators are also different, and corresponding shielding frames are respectively generated for the base station frames with different frequencies, so that base station signals with different frequencies can be comprehensively shielded; alternatively, a combined mask frame may be generated from the corresponding signal frame for the base station frame, and signals of various frequencies may be simultaneously masked.

In one embodiment, the step of generating the mask frame from the pre-stored user signal resources comprises the steps of:

In this embodiment, when a mask frame is generated, a user reference signal is obtained, where the user reference signal corresponds to a user signal resource, a base station frame includes a system common reference signal, and the system common reference signal is ubiquitous in the base station frame and is not related to whether the base station frame includes the user signal resource, and the user signal resource, the user reference signal, and the system common reference signal in the obtained pre-stored signal frame are used to synthesize the user signal resource, the user reference signal, and the system common reference signal to obtain the mask frame, where the mask frame is similar to a frame signal transmitted by the base station and can be used for signal masking, and the existence of the user reference signal and the system common reference signal can also appropriately reduce the power of the user signal resource, and improve the masking efficiency.

Further, the system common reference Signal may include a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), a Physical Broadcast Channel Signal (PBCH), and the like, and may be acquired from the received base station frame when the system common reference Signal is acquired, so that the mask frame and the system common reference Signal of the base station frame are consistent; when a plurality of shielding devices are used for signal shielding, a main synchronous signal, an auxiliary synchronous signal, a physical broadcast channel signal and the like can be acquired in sequence so as to realize signal synchronization among the plurality of shielding devices.

Further, the user reference signal may be generated based on the system common reference signal, and since there may be no user reference signal in the base station frame, the user reference signal may be generated based on the system common reference signal of the base station frame in a software manner, for example, the user reference signal of the base station frame may be calculated according to the base station specification by the system common reference signal, so that the shielding frame may be consistent with the user reference signal of the base station frame, and the shielding effect is ensured.

In one embodiment, before the step of masking the time slot in which the system receives the base station signal and receiving the base station frame, the method further comprises the following steps:

signal synchronization with the base station is established.

In this embodiment, before receiving the base station frame, it is necessary to establish signal synchronization with the base station and know the time slot of the signal transmitted by the base station, so as to accurately acquire the base station signal frame.

Further, the shielding System has a synchronization mechanism, and generally adopts free synchronization, GPS (global positioning System) synchronization, LTE (Long Term Evolution) System frame number synchronization, or 5G System frame number synchronization.

In one embodiment, the coverage band of the base station signal is 450MHz-52600 MHz. The coverage frequency band comprises 2G, 3G, 4G and 5G frequency bands, and signal shielding can be realized for various system frequency bands.

In one embodiment, the masking system may be a system that implements signal masking using store-and-forward.

As shown in fig. 2, the shielding system mainly comprises a transceiver antenna, a transceiver switch, a power amplifier, a low-noise amplifier module, a mixing module, an analog-to-digital conversion module (ADC), a digital-to-analog conversion module (DAC), and a Field Programmable Gate Array (FPGA).

Receiving a link: the antenna receives mobile communication wireless signals in the air, the signals are amplified through low-noise amplification and then are converted into analog intermediate-frequency signals through a frequency mixing module in a down-conversion mode, the analog intermediate-frequency signals are converted into digital intermediate-frequency signals through AD sampling and then are sent to the FPGA, a DDC module in the FPGA carries out digital frequency mixing and extraction on the signals and then the digital intermediate-frequency signals are converted into low-rate digital signals of zero intermediate frequency, then user signal resources are processed on the digital intermediate-frequency signals, finally shielding frames are generated, and the low-rate digital signals are sent to an RAM storage unit in the.

And a sending link: signals of an RAM storage unit in the FPGA are output to a DUC module for signal interpolation and digital mixing, then are sent to a DA (digital-to-analog) module to be converted into analog intermediate frequency signals, and the analog intermediate frequency signals are converted into radio frequency signals through the mixing module, amplified by a power amplifier and transmitted in the air through an antenna.

The FPGA has the main functions of carrying out signal sampling rate conversion, processing user signal resources, storing signals and periodically transmitting the signals, a local transceiving antenna receives downlink air signals of one frame or N frames, the downlink air signals are processed to obtain a shielding frame and stored, the signals of the shielding frame of one frame or N frames are repeatedly transmitted, the signals are re-received and processed (including the processing of adding a frame occupied by the maximum user to a 5G system) after being retransmitted for a period of time and stored, and the periodic operation of re-transmission is carried out. The frame time lengths of the communication systems of different standards are different, and the receiving and storing time is also changed correspondingly.

The process of processing the resulting mask frame is as follows:

selecting a frame with a user signal occupying more fully, selecting a signal frame with a user signal Resource occupying more fully by analyzing and comparing base station signal frames received for multiple times, and then forwarding a shielding signal, wherein in order to adapt to the change of an external environment, the user signal and a Resource Block (RB) occupied by a user reference signal or the frame with the Resource Block occupied more fully need to be continuously searched online all the time, for example, signals such as PSS (packet switching system) are taken as a power reference to be used as a reference for judging the existence of user information data so as to replace an old frame or replace the data of the user signal Resource corresponding to the frame stored in a memory according with a replacement rule;

in the replacement process, the frame signals can be spliced to obtain a frame with the resource block occupied by the user signals. Software generates user reference signals (multiple sets of processing are needed for multi-sector or multi-beam overlapping areas), and time domain or frequency domain splitting is carried out on user signal resources in a received base station frame and user signal resources in stored frame signals:

time domain splitting, namely replacing user signal resource time domain segments in the stored frame signals with user signal resource time domain segments with higher power in a base station frame, for example, splitting the time domain in a unit of 1 millisecond, and then selectively splicing;

and (3) frequency domain splitting, namely replacing the user signal resource frequency domain segments in the stored frame signals with user signal resource frequency domain segments with higher power in the base station frame, and selecting and splicing if the corresponding frequency width of the RB is the unit splitting.

After replacement, the RB where the system common reference signal (PSS, SSS, PBCH) is located is segmented in the base station frame, that is, the RB corresponding to the corresponding portion of the system common reference signal is cut out, updated in sequence, combined with the user signal resource and the user reference signal, to generate a mask frame, and the mask frame is forwarded and transmitted.

The shielding system adopts a store-and-forward mode, a local transceiving antenna receives, processes and stores a frame or N frames of downlink air signals, the downlink air signals are processed to generate a shielding frame, the frame or N frames of shielding frames are repeatedly sent, and the downlink air signals are received, processed and stored again after being retransmitted for a period of time and then retransmitted; the retransmission signal is frame aligned with the normal coverage signal and the modulation technique is the same. Because the signals received by the receiving and transmitting antenna are basically the signals which can be received by the nearby terminal, the signals in the air of all the systems can be shielded, and the method is applicable to various systems (GSM, CDMA, WCDMA, TD-SCDMA, TD-LTE, FDD-LTE and 5G).

When the shielding system is synchronized, free synchronization, GPS signal synchronization, LTE or 5G system frame number synchronization and the like can be adopted;

as shown in fig. 3, in the slot (frame) stage of the received signal, there is only the reference signal of the base station, and there is no shielding signal at this time; when the receiving and transmitting changeover switch is set to be in a transmitting state, the radio frequency signal level trip points are synchronous, and shielding begins; in the shielding transmission stage, a shielding signal is added to a base station signal, the signal intensity nearby is higher, and the base station signal is shielded; for example, after 30 times of continuous transmission, the transmission is switched to a receiving time slot (frame) stage, and only the reference signal of the base station exists at this time, and no shielding signal exists; the above processes are circulated to realize signal shielding.

According to the signal shielding method, an embodiment of the present invention further provides a signal shielding system, and the following describes an embodiment of the signal shielding system in detail.

Referring to fig. 4, a schematic structural diagram of a signal shielding system according to an embodiment is shown. The signal masking system in this embodiment comprises:

a signal receiving unit 210, configured to receive a base station frame in a timeslot where the shielding system receives a base station signal;

a mask frame processing unit 220, configured to obtain an occupancy rate of a user signal resource in a base station frame, and if the occupancy rate of the user signal resource in the base station frame is less than an occupancy rate of a user signal resource in a pre-stored signal frame, generate a mask frame according to the pre-stored signal frame;

the signal transmitting unit 230 is configured to transmit the mask frame in the time slot in which the mask system transmits the mask signal.

In this embodiment, the signal shielding system includes a signal receiving unit 210, a shielding frame processing unit 220, and a signal transmitting unit 230, the shielding system receives a base station signal first, generates and transmits a shielding signal according to the base station signal, the shielding signal mixes the base station signal to be received by the terminal device, the signal receiving unit 210 is configured to receive a time slot of the base station signal in the shielding system, receives a base station frame, the shielding frame processing unit 220 is configured to obtain an occupancy rate of a user signal resource in the base station frame from the shielding frame, if the occupancy rate is less than the occupancy rate of the user signal resource in a pre-stored signal frame, it indicates that the user signal in the current base station frame is less or not present, generates a shielding frame by using the pre-stored signal frame, the occupancy rate of the user signal resource in the shielding frame in the pre-stored signal frame is high, the signal transmitting unit 230 is configured, when the base station does not transmit user data, the whole carrier signal of the base station can be shielded, even if the signal transmitted by the base station contains the user data, the signal shielding effect can be realized, and the problem that the shielding part fails in practical application is solved.

In an embodiment, the signal receiving unit 210 is further configured to receive base station frames multiple times, and the mask frame processing unit 220 is further configured to obtain the occupancy rates of the corresponding user signal resources according to the multiple base station frames, and use the base station frame with the largest occupancy rate as a pre-stored signal frame.

In one embodiment, the mask frame processing unit 220 is further configured to generate a mask frame according to the base station frame when the occupancy rate of the user signal resource in the base station frame is greater than the occupancy rate of the user signal resource in the signal frame.

In one embodiment, the mask frame processing unit 220 is further configured to replace the signal frame with the base station frame when the occupancy rate of the user signal resource in the base station frame is greater than the occupancy rate of the user signal resource in the signal frame.

In one embodiment, the mask frame processing unit 220 is further configured to obtain power of a system common reference signal of the base station frame, use an association relationship between the system common reference signal and the power thereof as a reference, obtain power of a user signal resource in a corresponding base station frame according to the reference, and obtain an occupancy rate of the user signal resource in the base station frame according to the power of the user signal resource in the base station frame and the power of the system common reference signal.

In one embodiment, the mask frame processing unit 220 is further configured to split the user signal resource in the base station frame into a plurality of base station frame time domain segments, and split the user signal resource in the signal frame into a plurality of signal frame time domain segments; traversing and comparing each base station frame time domain segment with each corresponding signal frame time domain segment, and replacing the corresponding signal frame time domain segment with the base station frame time domain segment if the power of the base station frame time domain segment is greater than that of the corresponding signal frame time domain segment; after traversing is finished, obtaining an updated pre-stored signal frame; and the time domain segments of the frames of the base stations correspond to the time domain segments of the frames of the signals one by one.

In one embodiment, the mask frame processing unit 220 is further configured to split the user signal resource in the base station frame into a plurality of base station frame frequency domain segments, and split the user signal resource of the signal frame into a plurality of signal frame frequency domain segments; traversing and comparing each base station frame frequency domain segment with each corresponding signal frame frequency domain segment, and if the power of the base station frame frequency domain segment is greater than that of the corresponding signal frame frequency domain segment, replacing the corresponding signal frame frequency domain segment with the base station frame frequency domain segment; after traversing is finished, obtaining an updated pre-stored signal frame; and the frequency domain segments of the frames of the base stations correspond to the frequency domain segments of the frames of the signals one by one.

In one embodiment, the mask frame processing unit 220 is further configured to split the user signal resource in the base station frame into a plurality of base station frame resource blocks, and split the user signal resource in the signal frame into a plurality of signal frame resource blocks; traversing and comparing each base station frame resource block with each corresponding signal frame resource block, and replacing the corresponding signal frame resource block with the base station frame resource block if the power of the base station frame resource block is greater than that of the corresponding signal frame resource block; after traversing is finished, obtaining an updated pre-stored signal frame; and each base station frame resource block corresponds to each signal frame resource block one to one.

In one embodiment, the mask frame processing unit 220 is further configured to detect whether the base station reference data of the base station frame is consistent with the base station reference data of the signal frame, and if not, replace the signal frame with the base station frame;

or;

the signal receiving unit 210 is further configured to re-receive a plurality of base station frames after a preset time elapses;

the mask frame processing unit 220 is further configured to obtain the occupancy rates of the corresponding user signal resources according to the plurality of new base station frames, and replace the signal frame with the new base station frame with the largest occupancy rate.

In one embodiment, the mask frame processing unit 220 is further configured to generate corresponding mask frames for base station frames of different frequencies respectively; or generating a combined mask frame according to the corresponding signal frames for the base station frames with different frequencies.

In one embodiment, the mask frame processing unit 220 is further configured to obtain a user reference signal and a system common reference signal of a base station frame; and generating a shielding frame according to the user signal resource, the user reference signal and the system common reference signal in the signal frame.

The signal shielding system of the embodiment of the invention corresponds to the signal shielding method one by one, and the technical characteristics and the beneficial effects described in the embodiment of the signal shielding method are all applicable to the embodiment of the signal shielding system.

It should be noted that the readable storage medium and the signal shielding device may be independent of the shielding system or may be integrated in the shielding system.

It will be understood by those skilled in the art that all or part of the processes for implementing the signal shielding method according to the above embodiments may be implemented by a computer program, which is stored in a non-volatile computer readable storage medium, and in the embodiments, the program may be stored in a storage medium of a computer system and executed by at least one processor in the computer system to implement the processes including the embodiments of the signal shielding method according to the above embodiments. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Those skilled in the art will appreciate that all or part of the steps in the method for implementing the above embodiments may be implemented by a program instructing the relevant hardware. The program may be stored in a readable storage medium. Which when executed comprises the steps of the method described above. The storage medium includes: ROM/RAM, magnetic disk, optical disk, etc.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A method of signal masking, the method comprising the steps of:

acquiring the occupancy rate of user signal resources in the base station frame, and if the occupancy rate of the user signal resources in the base station frame is less than the occupancy rate of the user signal resources in a pre-stored signal frame, generating a shielding frame according to the pre-stored signal frame;

2. The signal masking method of claim 1, further comprising, before the step of generating a mask frame from a pre-stored signal frame, the steps of:

and receiving the base station frames for multiple times, respectively acquiring the occupancy rates of corresponding user signal resources according to the base station frames, and taking the base station frame with the maximum occupancy rate as the pre-stored signal frame.

3. The signal shielding method of claim 1, wherein after the step of obtaining the occupancy rate of the user signal resource in the base station frame, the method further comprises the following steps:

and if the occupancy rate of the user signal resources in the base station frame is greater than the occupancy rate of the user signal resources in the signal frame, generating the shielding frame according to the base station frame.

4. The signal masking method as claimed in claim 3, wherein said method further comprises the steps of:

and if the occupancy rate of the user signal resources in the base station frame is greater than the occupancy rate of the user signal resources in the pre-stored signal frame, replacing the signal frame with the base station frame.

5. The signal shielding method of claim 1, wherein the step of obtaining the occupancy rate of the user signal resource in the base station frame comprises the steps of:

and acquiring the power of a system common reference signal of the base station frame, taking the incidence relation between the system common reference signal and the power of the system common reference signal as a reference standard, acquiring the power of a user signal resource corresponding to the base station frame according to the reference standard, and acquiring the occupancy rate of the user signal resource in the base station frame according to the power of the user signal resource in the base station frame and the power of the system common reference signal.

6. The signal masking method of claim 4, wherein said step of replacing said signal frame with said base station frame comprises the steps of:

splitting user signal resources in the base station frame into a plurality of base station frame time domain segments, and splitting the user signal resources in the signal frame into a plurality of signal frame time domain segments, wherein each base station frame time domain segment corresponds to each signal frame time domain segment one to one;

traversing and comparing each base station frame time domain segment with each corresponding signal frame time domain segment, and replacing the corresponding signal frame time domain segment with the base station frame time domain segment if the power of the base station frame time domain segment is greater than the power of the corresponding signal frame time domain segment;

7. The signal masking method of claim 4, wherein said step of replacing said signal frame with said base station frame comprises the steps of:

splitting user signal resources in the base station frame into a plurality of base station frame frequency domain segments, and splitting the user signal resources in the signal frame into a plurality of signal frame frequency domain segments, wherein each base station frame frequency domain segment corresponds to each signal frame frequency domain segment one to one;

traversing and comparing each base station frame frequency domain segment with each corresponding signal frame frequency domain segment, and replacing the corresponding signal frame frequency domain segment with the base station frame frequency domain segment if the power of the base station frame frequency domain segment is greater than the power of the corresponding signal frame frequency domain segment;

8. The signal masking method of claim 4, wherein said step of replacing said signal frame with said base station frame comprises the steps of:

splitting user signal resources in the base station frame into a plurality of base station frame resource blocks, and splitting the user signal resources in the signal frame into a plurality of signal frame resource blocks, wherein each base station frame resource block corresponds to each signal frame resource block one to one;

9. The signal masking method as claimed in claim 1, wherein said method further comprises the steps of:

or;

10. The signal masking method of claim 1, wherein said step of generating a mask frame from said pre-stored signal frames comprises the steps of:

11. The signal masking method according to any one of claims 1 to 10, wherein the step of generating a mask frame from a pre-stored signal frame comprises the steps of:

acquiring a user reference signal and a system common reference signal of the base station frame;

and generating the shielding frame according to the user signal resource, the user reference signal and the system common reference signal in the signal frame.

12. A signal masking system, the system comprising:

a mask frame processing unit, configured to obtain an occupancy rate of a user signal resource in the base station frame, and if the occupancy rate of the user signal resource in the base station frame is less than an occupancy rate of a user signal resource in a pre-stored signal frame, generate a mask frame according to the pre-stored signal frame;

and the signal transmitting unit is used for transmitting the shielding frame in the time slot of the shielding system for transmitting the shielding signal.

13. A readable storage medium having stored thereon an executable program, wherein the executable program, when executed by a processor, implements the steps of the signal masking method of any one of claims 1 to 11.

14. A signal shielding device comprising a memory and a processor, the memory storing an executable program, wherein the processor implements the steps of the signal shielding method of any one of claims 1 to 11 when executing the executable program.