WO2022198424A1

WO2022198424A1 - Communication method and system, related device, and storage medium

Info

Publication number: WO2022198424A1
Application number: PCT/CN2021/082234
Authority: WO
Inventors: 李鹏; 高珂增; 金星
Original assignee: 海能达通信股份有限公司
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2022-09-29

Abstract

The present application provides a communication method and system, and a related device. In the method, a sending end establishes a communication connection with a receiving end, which ensures that data interaction can be performed between the receiving end and the sending end; after establishing the communication connection, the sending end performs randomized adjustment on a filtering parameter of a shaping filter, and filters data to be sent by using the shaping filter after performing after the randomized adjustment. In this way, the data is filtered by using different filtering modes, and different waveforms are output. Moreover, the filtering parameter is subjected to randomized adjustment, so that the adjustment of the filtering parameter is not periodic, and thus the output waveforms are not periodic. The aperiodic waveforms are not easily detected, so that the communication concealment of the system is improved.

Description

A communication method, system and related equipment and storage medium

technical field

The present application relates to the field of communication technologies, and in particular, to a communication method, system, related equipment and storage medium.

Background technique

At present, because some communication systems need to work in very harsh environments, optimized shaping filtering technology is used to improve the anti-interference ability of the system.

However, the optimized shaping filtering technology will filter the data in a fixed form and output a fixed waveform. For example, the GSM system uses a Gaussian waveform, and the LTE system uses a square wave. In the process of implementing the present invention, the inventor found that the prior art has the problem that the output fixed waveform is easy to be detected by an attacker, which leads to poor communication concealment of the system.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the embodiments of the present application provide a communication method and system, so as to achieve the purpose of improving communication concealment, and the technical solutions are as follows:

A method of communication comprising:

The sender and the receiver establish a communication connection;

The transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information to obtain a first shaping filter, and the configuration information at least includes information related to the covert communication between the transmitting end and the receiving end;

The sending end uses the first shaping filter to filter the target data to be sent by the sending end, takes the filtered target data as the first target data, and sends the first target data to the receiving end;

The sending end sends the configuration information to the receiving end.

Optionally, the sending end randomly adjusts the filtering parameters of the shaping filter to obtain the first shaping filter, including:

The transmitting terminal, according to the initial value of the pseudo-random sequence in the configuration information, utilizes a pseudo-random sequence generator to generate a target pseudo-random sequence;

In the preset correspondence between the pseudo-random sequence and the filtering parameter, search for the filtering parameter corresponding to the target pseudo-random sequence;

Using the found filtering parameters as the filtering parameters of the shaping filter, the first shaping filter is obtained.

Optionally, the process of setting the initial value of the pseudo-random sequence includes:

Obtain the identifier of the sending end, and/or the identifier of the receiving end;

The identifier of the transmitting end and/or the identifier of the receiving end is processed to obtain the initial value of the pseudo-random sequence.

Optionally, before the sending end randomly adjusts the filtering parameters of the shaping filter according to the configuration information, the method further includes:

The sender judges whether the communication concealment needs to be reduced;

If so, the sending end keeps the filtering parameters of the shaping filter unchanged, and uses the shaping filter to filter the target data to be sent by the sending end;

If not, the transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information.

The sending end performs a capability inquiry on the receiving end, and receives the capability information reported by the receiving end;

The sender determines whether the receiver supports a covert communication mode according to the capability information reported by the receiver;

If supported, the sending end randomly adjusts the filtering parameters of the shaping filter according to the configuration information.

A method of communication comprising:

The receiver establishes a communication connection with the sender;

The receiving end receives the configuration information sent by the sending end, where the configuration information at least includes information related to the covert communication between the sending end and the receiving end;

The receiving end receives the first target data from the transmitting end, and the first target data is that the transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information to obtain the first shaping filter , using the first shaping filter to filter the target data to be sent at the sending end to obtain data;

The receiving end performs matched filtering on the first target data based on the configuration information to obtain target data to be sent by the sending end.

Optionally, the receiving end performs matched filtering on the first target data based on the configuration information, including:

Based on the configuration information, the receiving end randomly adjusts the filtering parameters of the shaping filter to filter parameters consistent with the filtering parameters of the shaping filter at the transmitting end, to obtain a second shaping filter;

Using the second shaping filter, matched filtering is performed on the first target data.

A sending end, comprising: a processor, a memory, a data bus and a shaping filter, the processor and the memory communicate through the data bus;

the memory for storing programs;

The processor is configured to perform the following steps according to the program stored in the memory:

The sender and the receiver establish a communication connection;

sending, by the sending end, the configuration information to the receiving end;

The shaping filter is used to filter the target data to be sent at the sending end under the control of the processor.

Optionally, the processor is specifically used for:

According to the initial value of the pseudo-random sequence in the configuration information, use the pseudo-random sequence generator to generate the target pseudo-random sequence;

Optionally, the processor is also used for:

Optionally, before the processor randomly adjusts the filtering parameters of the shaping filter according to the configuration information, the processor is further configured to:

Determine whether it is necessary to reduce communication concealment;

If so, keep the filtering parameters of the shaping filter unchanged, and use the shaping filter to filter the target data to be sent at the sending end;

If not, randomize and adjust the filtering parameters of the shaping filter according to the configuration information.

Perform capability inquiry on the receiving end, and receive the capability information reported by the receiving end;

According to the capability information reported by the receiving end, determine whether the receiving end supports a covert communication mode;

If supported, randomize and adjust the filtering parameters of the shaping filter according to the configuration information.

A receiving end, comprising: a processor, a memory, a data bus and a shaping filter, the processor and the memory communicate through the data bus;

the memory for storing programs;

The processor is configured to execute the communication method according to claim 6 or 7 according to a program stored in the memory;

The shaping filter is configured to perform matched filtering on the first target data received by the receiving end under the control of the processor.

A communication system, comprising: a sending end and a receiving end, the sending end and the receiving end establish a communication connection;

The sending end randomly adjusts the filtering parameters of the shaping filter of the sending end, and after the random adjustment, a first shaping filter is obtained, and the first shaping filter is used to filter the target data to be sent, and the filtered Target data is used as first target data, and the first target data is sent to the receiving end; and,

Sending configuration information to the receiving end, where the configuration information at least includes information related to covert communication between the transmitting end and the receiving end;

The receiving end, based on the configuration information, randomly adjusts the filtering parameters of the receiving end shaping filter, and after the randomization adjustment, obtains a second shaping filter, and uses the second shaping filter to receive the first shaping filter. A target data is subjected to matched filtering to obtain the target data to be sent.

Optionally, the sending end includes:

a control sequence generator, configured to generate a pseudo-random sequence according to the initial value of the pseudo-random sequence in the configuration information;

The processor obtains the pseudo-random sequence from the control sequence generator, uses the obtained pseudo-random sequence as the target pseudo-random sequence, and searches for the target in the preset correspondence between the pseudo-random sequence and the waveform information The waveform information corresponding to the pseudo-random sequence and the found waveform information are used as filtering parameters of the shaping filter.

Optionally, the sending end includes: a processor;

The processor is used for judging whether the communication concealment needs to be reduced;

Optionally, the sending end includes: a processor;

the processor, configured to perform a capability inquiry on the receiving end, and receive capability information reported by the receiving end; and,

If supported, the filtering parameters of the shaping filter are randomly adjusted according to the configuration information.

A storage medium, characterized in that the storage medium stores a computer program for implementing the communication method described in any one of the above, and the computer program is executed by a processor to realize the communication method described in any one of the above. the steps;

A storage medium, which stores a computer program for implementing the above-mentioned communication method, and implements each step of the above-mentioned communication method.

Compared with the prior art, the beneficial effects of the present application are:

In this application, a communication connection is established between the transmitting end and the receiving end to ensure that the receiving end and the transmitting end can exchange data. After the communication connection is established, the transmitting end randomly adjusts the filtering parameters of the shaping filter. After the randomization adjustment , use the shaping filter to filter the data to be sent, realize the use of different filtering methods, filter the data, output different waveforms, and randomize the way of adjusting the filtering parameters, so that the adjustment of the filtering parameters does not have periodicity, thereby making the output The waveform does not have periodicity, and the waveform without periodicity is not easy to be detected, so that the communication concealment of the system is improved.

In addition, only the receiver that establishes a communication connection with the sender and receives the configuration information sent by the sender can perform matched filtering, so that other devices cannot perform matched filtering on the data sent by the sender, reducing attacks by other devices and further improving the system. communication concealment.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

1 is a flowchart of Embodiment 1 of a communication method provided by the present application;

2 is a schematic flowchart of Embodiment 2 of a communication method provided by the present application;

3 is a schematic flowchart of Embodiment 3 of a communication method provided by the present application;

4 is a schematic flowchart of Embodiment 4 of a communication method provided by the present application;

5 is a schematic diagram of the logical structure of a transmitter provided by the present application;

6 is a schematic diagram of the logical structure of a receiving end provided by the present application;

FIG. 7 is a schematic diagram of a logical structure of a communication system provided by the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1, the flow chart of a kind of communication method embodiment 1 provided by the application, the method is applied to the transmitting end, and the method may include the following steps:

Step S11, the sending end and the receiving end establish a communication connection.

In this embodiment, the transmitting end may be, but not limited to, a base station. Correspondingly, the receiving end may be, but not limited to, a terminal.

The process of establishing a communication connection between the base station and the terminal may include:

S111. The base station sends the synchronization sequence and the broadcast signal based on the standard system waveform, so that the terminal receives the synchronization sequence and the broadcast signal, and accesses the base station based on the synchronization sequence and the broadcast signal.

Standard system waveforms are defined by communication protocols that both base stations and terminals need to comply with.

It should be noted that because the synchronization sequence is a low-power signal and the transmission period of the broadcast signal is long, the synchronization sequence and the broadcast signal have little effect on the periodicity of the transmitted signal, and will not affect the entire communication link due to the use of a fixed waveform. of concealment.

S112: After the terminal accesses the base station, establish a communication link between the base station and the terminal.

In this embodiment, the process of establishing the communication link between the base station and the terminal is the same as the establishment process of a typical communication link (eg, the communication link of the LTE system), which is not repeated here.

Step S12: The transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information to obtain a first shaping filter.

The configuration information includes at least information related to covert communication between the sender and the receiver.

The configuration information may include, but is not limited to, the waveform settings of the shaping filter, the initial value of the randomization sequence, the modulation and coding configuration of the transmitted data, and the transmission power configuration. The waveform settings of the shaping filter may include, but are not limited to, the type of waveform of the shaping filter, such as a Gaussian waveform or a root raised cosine waveform. The initial value of the randomization sequence is used by the randomization sequence generator to generate the randomization sequence. Based on the randomization sequence, the filtering parameters of the shaping filter can be determined. In this embodiment, the randomization sequence may be, but not limited to, a pseudo-random sequence.

In this embodiment, the sending end randomly adjusts the filtering parameters of the shaping filter to obtain the first shaping filter, which may include but is not limited to:

S121. The transmitting end generates a target pseudorandom sequence by using a pseudorandom sequence generator according to the initial value of the pseudorandom sequence in the configuration information.

It can be understood that the pseudo-random sequence generator, after the initial value of the pseudo-random sequence is given, the pseudo-random sequence generator will continue to generate the pseudo-random sequence, and the pseudo-random sequence has random characteristics and does not have regularity.

In this embodiment, the process of setting the initial value of the pseudo-random sequence may include, but is not limited to:

S1201. Acquire the identifier of the sending end, and/or the identifier of the receiving end.

S1202. Process the identifier of the transmitting end and/or the identifier of the receiving end to obtain an initial value of a pseudo-random sequence.

In this application, the method of processing the identifier of the sender and/or the identifier of the receiver is not limited. Specifically, the process of processing the identifier of the transmitting end and/or the identifier of the receiving end to obtain the initial value of the pseudo-random sequence may include, but is not limited to:

use

Obtain the initial value of the pseudo-random sequence, where n _RNTI is the identity of the receiver,

is the identifier of the sender, n _s is the number of the half-subframe currently sent, and c _init is the initial value of the pseudo-random sequence.

Corresponding to the above-mentioned setting process of the initial value of the pseudo-random sequence, according to the initial value of the pseudo-random sequence in the configuration information, the pseudo-random sequence generator is used to generate the target pseudo-random sequence, which may include:

The pseudo-random sequence is generated by a sequence of length 31, denoted by c(n), where n=0, 1, . . . , M _PN -1, and M _PN is the length of the pseudo-random sequence. The generation formula of c(n) is as follows:

c(n)=(x ₁ (n+ _NC )+x ₂ (n+ _NC ))mod 2

x ₁ (n+31)=(x ₁ (n+3)+x ₁ (n))mod 2

x ₂ (n+31)=(x ₂ (n+3)+x ₂ (n+2)+x ₂ (n+1)+x ₂ (n))mod 2

Wherein, N _c =1600, m sequence x ₁ (n) is initialized with x ₁ (0)=1, x ₁ (n)=0, n=1,2,...,30, m sequence x ₂ ( n) use

to initialize.

The sender, according to the initial value of the pseudo-random sequence in the configuration information, uses a pseudo-random sequence generator to generate a target pseudo-random sequence, which may include:

The sender uses a pseudo-random sequence generator to generate a target pseudo-random sequence according to the initial value of the pseudo-random sequence in the configuration information;

Or, the sender generates multiple target pseudorandom sequences by using multiple pseudorandom sequence generators according to the initial value of the pseudorandom sequence in the configuration information.

The sender uses multiple pseudo-random sequence generators to generate multiple target pseudo-random sequences, which can be understood as: the sender uses each of the multiple pseudo-random sequence generators to generate a target pseudo-random sequence respectively.

In this embodiment, the initial value of the pseudo-random sequence of each pseudo-random sequence generator can be set to be the same. Under the condition that the initial value of the pseudo-random sequence is the same, the target pseudo-random sequence generated by each pseudo-random sequence generator is the same.

Of course, the initial values of the pseudo-random sequences of each pseudo-random sequence generator can also be set to be different. In the case where the initial values of the pseudo-random sequences are different, the pseudo-random sequences generated by each pseudo-random sequence generator are different. .

In this embodiment, the transmitting end may perform the generation process of the target pseudo-random sequence once every set time. The generation process of the target pseudo-random sequence, that is, the above-mentioned sending end uses a pseudo-random sequence generator to generate the target pseudo-random sequence according to the initial value of the pseudo-random sequence in the configuration information;

The setting time can be set as required, and is not limited in this application.

In the case where the sender uses multiple pseudo-random sequence generators to generate multiple target pseudo-random sequences, if the target pseudo-random sequences generated by each pseudo-random sequence generator are the same, in this case, multiple target pseudo-random sequences can be generated. The target pseudo-random sequence is processed as follows to obtain multiple different target pseudo-random sequences:

Keep one of the target pseudo-random sequences unchanged, and perform a shift operation on the other target pseudo-random sequences. For example, if three target pseudo-random sequences are generated, keep one of the three target pseudo-random sequences unchanged, and shift the other two target pseudo-random sequences respectively among the three target pseudo-random sequences operation, and finally get 3 different target pseudo-random sequences.

When the sender uses multiple pseudo-random sequence generators to generate multiple target pseudo-random sequences, if the target pseudo-random sequences generated by each pseudo-random sequence generator are different, the sender may not process them.

S122 , in the preset correspondence between the pseudo-random sequence and the filtering parameter, search for the filtering parameter corresponding to the target pseudo-random sequence.

Filter parameters may include, but are not limited to, the alpha value of the root raised cosine waveform.

The corresponding relationship between the preset pseudo-random sequence and filtering parameters will now be introduced by way of example. For example, the preset filtering parameters include: 8 different α values of the root raised cosine waveform, and 8 different α values need to correspond to 8 different α values. The pseudo-random sequence of , that is, the correspondence between the preset pseudo-random sequence and the filtering parameters includes: the correspondence between 8 different pseudo-random sequences and 8 different α values. For example, pseudorandom sequence 1 corresponds to α1, pseudorandom sequence 2 corresponds to α2, pseudorandom sequence 3 corresponds to α3, pseudorandom sequence 4 corresponds to α4, pseudorandom sequence 5 corresponds to α5, pseudorandom sequence 6 corresponds to α6, and pseudorandom sequence 7 corresponds to α7 , Pseudo-random sequence 8 corresponds to α8.

S123. Use the found filter parameters as the filter parameters of the shaping filter to obtain a first shaping filter.

Step S13, the sending end uses the first shaping filter to filter the target data to be sent by the sending end, uses the filtered target data as the first target data, and sends the first target data to the receiving end end.

Step S14: The sending end sends configuration information to the receiving end.

The sending end sends configuration information to the receiving end, so that the receiving end can perform matched filtering on data from and sending ends based on the configuration information.

In this embodiment, steps S11-S14 are processes in which the transmitter communicates with one receiver. When the transmitter communicates with multiple receivers, the transmitter sets a transmitter-side shaping filter for each receiver. The communication process between the sending end and each receiving end is the same as the related introduction in steps S11-S14, which will not be repeated here.

As another optional embodiment of the present application, referring to FIG. 2 , which is a schematic flowchart of Embodiment 2 of a communication method provided by the present application. This embodiment is mainly an extension of the communication method described in Embodiment 1 above, as shown in FIG. 2, the method can include but is not limited to the following steps:

Step S21, the sending end and the receiving end establish a communication connection.

For the detailed process of step S21, reference may be made to the related introduction of step S11 in Embodiment 1, which will not be repeated here.

Step S22, the sending end judges whether the communication concealment needs to be reduced.

If yes, go to step S23; if not, go to step S24.

In this embodiment, when the transmitting end is a base station and the receiving end is a terminal, the process of the transmitting end judging whether it is necessary to reduce the communication concealment may include: the transmitting end judging whether the data to be sent by the transmitting end side includes a cell system message or multi-cell cooperation data.

If the cell system message or the multi-cell cooperation data is included, step S23 is performed; if the cell system message or the multi-cell cooperation data is not included, step S24 is performed

The cell system message can be understood as: configuration information of the cell covered by the sender. Because before the receiving end accesses a cell, it needs to obtain the system information of the cell so as to communicate correctly in the cell. Therefore, any receiving end needs to obtain the cell system information in order to communicate correctly.

Multi-cell cooperation data can be understood as: data corresponding to when multiple cells cooperate together. Since the same data needs to be used when multiple cells cooperate, the multi-cell cooperation data should also be acquired by the receivers of different cells.

Step S23, the sending end keeps the filtering parameters of the shaping filter unchanged, and uses the shaping filter to filter the target data to be sent by the sending end.

When the communication concealment needs to be reduced, the transmitting end keeps the filtering parameters of the shaping filter unchanged, and uses the shaping filter to filter the target data to be sent by the transmitting end, so that more data can be received and acquired.

Step S24: The transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information, to obtain a first shaping filter.

The configuration information at least includes information related to covert communication between the sender and the receiver.

Step S25, the sending end uses the first shaping filter to filter the target data to be sent by the sending end, uses the filtered target data as the first target data, and sends the first target data to the receiving end. end.

Step S26, the sending end sends the configuration information to the receiving end.

For the detailed process of steps S24-S26, reference may be made to the related introduction of steps S12-S14 in Embodiment 1, and details are not repeated here.

In this embodiment, the sender determines whether the communication concealment needs to be reduced, and performs corresponding operations based on the determination result, thereby improving the flexibility of communication.

As another optional embodiment of the present application, referring to FIG. 3 , which is a schematic flowchart of Embodiment 3 of a communication method provided by the present application. This embodiment is mainly an extension of the communication method described in Embodiment 1 above, as shown in FIG. 3, the method can include but is not limited to the following steps:

Step S31, the sending end and the receiving end establish a communication connection.

For the detailed process of step S31, reference may be made to the related introduction of step S11 in Embodiment 1, and details are not repeated here.

Step S32, the sending end performs a capability inquiry on the receiving end, and receives the capability information reported by the receiving end.

Step S33: The sender determines whether the receiver supports a covert communication mode according to the capability information reported by the receiver.

In this embodiment, the capability information reported by the receiving end at least includes information indicating whether the receiving end supports the covert communication mode. Specifically, it can be determined whether the receiving end supports the covert communication mode according to the information representing whether the receiving end supports the covert communication mode.

If yes, go to step S34.

Step S34: The transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information, to obtain a first shaping filter.

Step S35, the sending end uses the first shaping filter to filter the target data to be sent by the sending end, uses the filtered target data as the first target data, and sends the first target data to the receiving end. end.

Step S36, the sending end sends the configuration information to the receiving end.

For the detailed process of steps S34-S36, reference may be made to the related introduction of steps S12-S14 in Embodiment 1, and details are not repeated here.

As shown in FIG. 4 , which is a flowchart of Embodiment 4 of a communication method provided by the present application, the method is applied to a receiving end, and the method may include the following steps:

Step S41, the receiving end establishes a communication connection with the transmitting end.

In this embodiment, the receiving end may be, but not limited to, a terminal. Correspondingly, the transmitting end may be, but not limited to, a base station.

The process of establishing a communication connection between the terminal and the base station may include:

S411. The terminal receives the synchronization sequence and the broadcast signal sent by the base station, and accesses the base station based on the synchronization sequence and the broadcast signal.

The base station is based on the synchronization sequence and broadcast signal sent by the standard system waveform. Standard system waveforms are defined by communication protocols that both base stations and terminals need to comply with.

S412. After the terminal accesses the base station, establish a communication link between the base station and the terminal.

Step S42: The receiving end receives configuration information sent by the sending end, where the configuration information at least includes information related to covert communication between the sending end and the receiving end.

Step S43, the receiving end receives the first target data from the transmitting end, and the first target data is that the transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information to obtain the first target data. A shaping filter, which uses the first shaping filter to filter the target data to be sent at the sending end to obtain data.

Step S44: The receiving end performs matched filtering on the first target data based on the configuration information to obtain target data to be sent by the sending end.

In this embodiment, the process that the receiving end performs matched filtering on the first target data based on the configuration information may include:

S441. Based on the configuration information, the receiving end randomly adjusts the filtering parameters of the shaping filter to filter parameters consistent with the filtering parameters of the shaping filter at the transmitting end to obtain a second shaping filter.

Since the configuration information includes at least information related to the covert communication between the sending end and the receiving end, based on the configuration information, the receiving end can randomly adjust the filtering parameters of its shaping filter to be consistent with the shaping filter of the sending end. Filter parameters with the same filter parameters.

Specifically, the receiving end may use the initial value of the pseudo-random sequence in the configuration information as the initial value of the pseudo-random sequence generator of the receiving end, and after the initial value of the pseudo-random sequence generator of the receiving end is determined, use the pseudo-random sequence of the receiving end The generated pseudo-random sequence is the same as the pseudo-random sequence generated by the sender using the pseudo-random sequence generator.

In the case of generating the same pseudo-random sequence, from the preset correspondence between the pseudo-random sequence and the filtering parameters, the found filtering parameters are also consistent with the filtering parameters found by the transmitting end. When the filtering parameters are the same, the filtering parameters of the shaping filter at the receiving end are the same as the filtering parameters of the shaping filter at the transmitting end.

S442. Use the second shaping filter to perform matched filtering on the first target data.

After the filtering parameters of the shaping filter at the receiving end are adjusted to the filter parameters consistent with the filtering parameters of the shaping filter at the transmitting end, the second shaping filter is used to perform matched filtering on the first target data to obtain the transmission The target data to be sent at the terminal can be accurately obtained from the received data.

Next, the sending end, the receiving end and the communication system provided by the present application will be introduced. The sending end, the receiving end and the communication system described below and the communication method described above can be referred to each other correspondingly.

Referring to FIG. 5, the sending end includes: a processor 1001, a memory 1002, a data bus 1003 and a shaping filter 1004, and the processor 1001 and the memory 1002 communicate through the data bus 1003;

The memory 1002 is used to store programs;

The processor 1001 is configured to execute, according to the program stored in the memory 1002, the communication method described in any one of the method embodiments 1-3.

The shaping filter 1004 is configured to filter the target data to be sent by the sending end under the control of the processor 1001 .

Referring to FIG. 6, the receiving end includes: a processor 2001, a memory 2002, a data bus 2003 and a shaping filter 2004, and the processor 2001 and the memory 2002 communicate through the data bus 2003;

The memory 2002 is used to store programs;

The processor 2001 is configured to execute the communication method described in Method Embodiment 4 according to the program stored in the memory 2002 .

The shaping filter 2004 is configured to perform matched filtering on the first target data received by the receiving end under the control of the processor 2001 .

Referring to FIG. 7 , the communication system includes: a sending end 100 and a receiving end 200 .

The sending end 100 and the receiving end 200 establish a communication connection;

The sending end 100 performs randomization adjustment on the filtering parameters of the sending end shaping filter, and after the randomization adjustment, a first shaping filter is obtained, and the first shaping filter is used to filter the target data to be sent, and the filtered The target data is used as the first target data, and the first target data is sent to the receiver 200;

Sending configuration information to the receiving end 200, the configuration information at least includes information related to the covert communication between the transmitting end and the receiving end;

The receiving end 200, based on the configuration information, randomly adjusts the filtering parameters of the receiving end shaping filter, obtains a second shaping filter after the randomization adjustment, and uses the second shaping filter to perform the received filter. The first target data is subjected to matched filtering to obtain the target data to be sent.

The sending end 100 includes:

In this embodiment, the sending end 100 may include: a processor;

If so, keep the filtering parameters of the shaping filter unchanged, and use the shaping filter to filter the target data to be sent by the sending end 100;

In this embodiment, the sending end 100 may include: a processor;

the processor, configured to inquire the capability of the receiving end 200, and receive capability information reported by the receiving end 200; and,

According to the capability information reported by the receiving end 200, determine whether the receiving end 200 supports a covert communication mode;

In another embodiment of the present application, a storage medium is provided, and the storage medium stores a computer program for implementing the communication method described in any one of Method Embodiments 1-3, or, implementing the communication method as described in Method Embodiment 4 The computer program of the communication method introduced, the computer program being executed by the processor to implement each step of the communication method as described in any one of Method Embodiments 1-3, or, to implement the communication method as described in Method Embodiment 4 of each step.

It should be noted that each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments may be referred to each other. As for the apparatus type embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the relevant part, please refer to the partial description of the method embodiment.

Finally, it should also be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or that there is any such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

For the convenience of description, when describing the above device, the functions are divided into various units and described respectively. Of course, when implementing the present application, the functions of each unit may be implemented in one or more software and/or hardware.

From the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in storage media, such as ROM/RAM, magnetic disks , CD-ROM, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments or some parts of the embodiments of the present application.

A communication method, system, related equipment and storage medium provided by the present application have been introduced in detail above. The principles and implementations of the present application are described with specific examples in this paper. The descriptions of the above embodiments are only used to help At the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation and application scope. In summary, the content of this specification does not It should be understood as a limitation of this application.

Claims

A communication method, comprising:

The sender and the receiver establish a communication connection;

The transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information to obtain a first shaping filter, and the configuration information at least includes information related to the covert communication between the transmitting end and the receiving end;

The sending end uses the first shaping filter to filter the target data to be sent by the sending end, takes the filtered target data as the first target data, and sends the first target data to the receiving end;

The sending end sends the configuration information to the receiving end.
The method according to claim 1, wherein the transmitting end randomly adjusts the filtering parameters of the shaping filter to obtain the first shaping filter, comprising:

The sending end, according to the initial value of the pseudo-random sequence in the configuration information, uses a pseudo-random sequence generator to generate a target pseudo-random sequence;

In the preset correspondence between the pseudo-random sequence and the filtering parameter, search for the filtering parameter corresponding to the target pseudo-random sequence;

Using the found filtering parameters as the filtering parameters of the shaping filter, the first shaping filter is obtained.
The method according to claim 2, wherein the process of setting the initial value of the pseudo-random sequence comprises:

Obtain the identifier of the sending end, and/or the identifier of the receiving end;

The identifier of the transmitting end and/or the identifier of the receiving end is processed to obtain the initial value of the pseudo-random sequence.
The method according to any one of claims 1-3, wherein before the transmitting end performs random adjustment on the filtering parameters of the shaping filter according to the configuration information, the method further comprises:

The sender judges whether the communication concealment needs to be reduced;

If so, the sending end keeps the filtering parameters of the shaping filter unchanged, and uses the shaping filter to filter the target data to be sent by the sending end;

If not, the transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information.
The method according to any one of claims 1-3, wherein before the transmitting end performs randomization adjustment to the filtering parameters of the shaping filter according to the configuration information, the method further comprises:

The sending end performs a capability inquiry on the receiving end, and receives the capability information reported by the receiving end;

The sender determines whether the receiver supports a covert communication mode according to the capability information reported by the receiver;

If supported, the sending end randomly adjusts the filtering parameters of the shaping filter according to the configuration information.
A communication method, comprising:

The receiver establishes a communication connection with the sender;

The receiving end receives the configuration information sent by the sending end, where the configuration information at least includes information related to the covert communication between the sending end and the receiving end;

The receiving end receives the first target data from the transmitting end, and the first target data is that the transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information to obtain the first shaping filter , using the first shaping filter to filter the target data to be sent at the sending end to obtain data;

The receiving end performs matched filtering on the first target data based on the configuration information to obtain target data to be sent by the sending end.
The method according to claim 6, wherein the receiving end performs matched filtering on the first target data based on the configuration information, comprising:

Based on the configuration information, the receiving end randomly adjusts the filtering parameters of the shaping filter to filter parameters consistent with the filtering parameters of the shaping filter at the transmitting end, to obtain a second shaping filter;

Using the second shaping filter, matched filtering is performed on the first target data.
A sending end, characterized in that it comprises: a processor, a memory, a data bus and a shaping filter, and the processor and the memory communicate through the data bus;

the memory for storing programs;

The processor is configured to perform the following steps according to the program stored in the memory:

The sender and the receiver establish a communication connection;

The transmitting end randomly adjusts the filtering parameters of the shaping filter according to the configuration information to obtain a first shaping filter, and the configuration information at least includes information related to the covert communication between the transmitting end and the receiving end;

The sending end uses the first shaping filter to filter the target data to be sent by the sending end, takes the filtered target data as the first target data, and sends the first target data to the receiving end;

sending, by the sending end, the configuration information to the receiving end;

The shaping filter is used to filter the target data to be sent at the sending end under the control of the processor.
The transmitter according to claim 8, wherein the processor is specifically configured to:

According to the initial value of the pseudo-random sequence in the configuration information, use the pseudo-random sequence generator to generate the target pseudo-random sequence;

In the preset correspondence between the pseudo-random sequence and the filtering parameter, search for the filtering parameter corresponding to the target pseudo-random sequence;

Using the found filtering parameters as the filtering parameters of the shaping filter, the first shaping filter is obtained.
The transmitting end according to claim 8 or 9, wherein the processor is further configured to:

Obtain the identifier of the sending end, and/or the identifier of the receiving end;

The identifier of the transmitting end and/or the identifier of the receiving end is processed to obtain the initial value of the pseudo-random sequence.
The transmitting end according to any one of claims 8-10, wherein before the processor performs random adjustment on filtering parameters of the shaping filter according to the configuration information, the processor is further configured to:

Determine whether it is necessary to reduce communication concealment;

If so, keep the filtering parameters of the shaping filter unchanged, and use the shaping filter to filter the target data to be sent at the sending end;

If not, randomize and adjust the filtering parameters of the shaping filter according to the configuration information.
The transmitting end according to any one of claims 8-10, wherein before the processor performs random adjustment on filtering parameters of the shaping filter according to the configuration information, the processor is further configured to:

Perform capability inquiry on the receiving end, and receive the capability information reported by the receiving end;

According to the capability information reported by the receiving end, determine whether the receiving end supports a covert communication mode;

If supported, randomize and adjust the filtering parameters of the shaping filter according to the configuration information.
A receiving end, characterized in that it includes: a processor, a memory, a data bus and a shaping filter, and the processor and the memory communicate through the data bus;

the memory for storing programs;

The processor is configured to execute the communication method according to claim 6 or 7 according to a program stored in the memory;

The shaping filter is configured to perform matched filtering on the first target data received by the receiving end under the control of the processor.
A communication system, characterized in that it comprises: a sending end and a receiving end, wherein the sending end and the receiving end establish a communication connection;

The sending end randomly adjusts the filtering parameters of the shaping filter of the sending end, and after the random adjustment, a first shaping filter is obtained, and the first shaping filter is used to filter the target data to be sent, and the filtered Target data is used as first target data, and the first target data is sent to the receiving end; and,

Sending configuration information to the receiving end, where the configuration information at least includes information related to covert communication between the transmitting end and the receiving end;

The receiving end, based on the configuration information, randomly adjusts the filtering parameters of the receiving end shaping filter, and after the randomization adjustment, obtains a second shaping filter, and uses the second shaping filter to receive the first shaping filter. A target data is subjected to matched filtering to obtain the target data to be sent.
The system according to claim 14, wherein the transmitting end comprises:

a control sequence generator, configured to generate a pseudo-random sequence according to the initial value of the pseudo-random sequence in the configuration information;

The processor obtains the pseudo-random sequence from the control sequence generator, uses the obtained pseudo-random sequence as the target pseudo-random sequence, and searches for the target in the preset correspondence between the pseudo-random sequence and the waveform information The waveform information corresponding to the pseudo-random sequence and the found waveform information are used as filtering parameters of the shaping filter.
The system according to claim 14, wherein the sending end comprises: a processor;

The processor is used for judging whether the communication concealment needs to be reduced;

If so, keep the filtering parameters of the shaping filter unchanged, and use the shaping filter to filter the target data to be sent at the sending end;

If not, randomize and adjust the filtering parameters of the shaping filter according to the configuration information.
The system according to claim 14, wherein the sending end comprises: a processor;

the processor, configured to perform a capability inquiry on the receiving end, and receive capability information reported by the receiving end; and,

According to the capability information reported by the receiving end, determine whether the receiving end supports a covert communication mode;

If supported, the filtering parameters of the shaping filter are randomly adjusted according to the configuration information.
A storage medium, characterized in that, the storage medium stores a computer program for implementing the communication method according to any one of claims 1-5, and the computer program is executed by a processor to realize the communication method according to claim 1-5. each step of the communication method described in any one of them.
A storage medium, characterized in that, the storage medium stores a computer program for implementing the communication method according to claim 6 or 7, and realizes each step of the communication method according to claim 6 or 7.