CN111526513A - Intermittent cooperative interference method and device based on WLAN (Wireless local area network) protocol - Google Patents
Intermittent cooperative interference method and device based on WLAN (Wireless local area network) protocol Download PDFInfo
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Abstract
The invention provides an intermittent cooperative interference method and device based on a WLAN (Wireless local area network) protocol, wherein the method comprises the following steps: calculating the transmission time of a legal sending end for sending a data frame and calculating the total number of samples according to the transmission time of the data frame; determining an interference power of intermittent cooperative interference based on the adoption total; confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power; and determining an interference mode and an interference position for intermittent cooperative interference. The technical scheme of the invention can combine the data frame structure of the WLAN protocol with the cooperative interference scheme to generate intermittent interference signals to efficiently interfere the receiving signals of the eavesdropper, thereby effectively ensuring the safe transmission of legal signals.
Description
Technical Field
The invention relates to the technical field of encryption, in particular to an intermittent cooperative interference method and device based on a WLAN (wireless local area network) protocol.
Background
With the continuous development of the internet of things technology, more and more sensitive data are transmitted in a network, and therefore people pay attention to the green and safe communication. The internet of things equipment is usually powered by a battery, so a complex, low-energy and high-efficiency safety solution is needed to ensure the communication safety of the internet of things. Physical layer security techniques based on cooperative interference have received much attention compared to conventional high-level encryption techniques. The interference to an eavesdropper is finished by utilizing the cooperation between nodes in the network and the channel characteristics of a wireless channel, so that the aim of ensuring that a communication signal is not eavesdropped and finishing the safe transmission is fulfilled.
However, the current cooperative interference technology mainly adopts a continuous interference scheme, and in the process of communication at the legal transceiving end, the cooperative interference source continuously sends an interference signal, so as to ensure the transmission safety of the signal. Although this solution has good safety performance, the energy consumption is very high and is not suitable for the internet of things devices with limited energy. On the other hand, as long as the signal received by the eavesdropper is damaged to a certain degree, the eavesdropper cannot acquire legal information from the signal, so that the continuous transmission of the interference signal causes unnecessary noise pollution, and the requirement of green communication is not met. Therefore, a safe and energy-efficient cooperative interference scheme is very necessary.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an intermittent cooperative interference method and device based on a WLAN protocol, which combines the data frame structure of the WLAN and the design of a cooperative interference mechanism to realize the purpose of efficiently interfering an eavesdropper.
In order to achieve the purpose, the invention provides the following technical scheme:
in one aspect, the present invention provides an intermittent cooperative interference method based on a WLAN protocol, including:
calculating the transmission time of a legal sending end for sending a data frame and calculating the total number of samples according to the transmission time of the data frame;
determining an interference power of intermittent cooperative interference based on the adoption total;
confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power;
and determining an interference mode and an interference position for intermittent cooperative interference.
Wherein, the calculating the transmission time of the data frame sent by the legal sending end includes:
calculating the total number of data frames corresponding to the message length, the idle time between two data frames and the time length of the data frames;
determining the transmission time of the data frames according to the total number of the data frames corresponding to the message length, the idle time between the two data frames and the time length of the data frames;
the message length is the number of bytes occupied by the message sent to the legal receiving end by the legal sending end.
Wherein the calculating the total number of samples according to the transmission time of the data frame comprises:
calculating the total number of data frames corresponding to the message length and determining the sampling rate;
and determining the total number of samples according to the total number of the data frames, the transmission time of the data frames and the sampling rate.
Wherein the determining the interference power of the intermittent cooperative interference based on the total number of adoption comprises:
determining the pulse width of an interference signal of intermittent cooperative interference and the pulse amplitude of the interference signal;
and determining the interference power of the intermittent cooperative interference according to the pulse width of the interference signal of the intermittent cooperative interference and the pulse amplitude of the interference signal.
Wherein the interference mode comprises: periodic single pulse interference, periodic multi-pulse interference, and random multi-pulse interference.
Wherein the interference location comprises: preamble, data field, and full frame.
In another aspect, the present invention further provides an intermittent cooperative jamming device based on a WLAN protocol, where the device includes:
the calculating unit is used for calculating the transmission time of the data frame sent by the legal sending end and calculating the total number of samples according to the transmission time of the data frame;
an interference power unit for determining an interference power of the intermittent cooperative interference based on the total number of adoption;
the interference unit is used for confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power;
and the selecting unit is used for determining an interference mode and an interference position to perform intermittent cooperative interference.
Wherein the calculation unit includes:
the calculating subunit is used for calculating the total number of the data frames corresponding to the message length, the idle time between the two data frames and the time length of the data frames;
the determining subunit is used for determining the transmission time of the data frame according to the total number of the data frames corresponding to the message length, the idle time between the two data frames and the time length of the data frame;
the message length is the number of bytes occupied by the message sent to the legal receiving end by the legal sending end.
In another aspect, the present invention further provides an electronic device, including: a processor, a memory, a communication interface, and a communication bus; wherein,
the processor, the communication interface and the memory complete mutual communication through a communication bus;
the processor is used for calling logic instructions in the memory to execute the intermittent cooperative interference method based on the WLAN protocol.
In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the WLAN protocol based intermittent cooperative interference method.
According to the technical scheme, the intermittent cooperative interference method and device based on the WLAN protocol calculate the transmission time of the data frame sent by the legal sending end and calculate the total number of samples according to the transmission time of the data frame; determining an interference power of intermittent cooperative interference based on the adoption total; confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power; an interference mode and an interference position are determined for intermittent cooperative interference, a data frame structure of a WLAN protocol can be combined with a cooperative interference scheme, an intermittent interference signal is generated to efficiently interfere a receiving signal of an eavesdropper, and the safe transmission of a legal signal is effectively ensured.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram illustrating a frame structure of an IEEE 802.11n data frame in the prior art;
fig. 2 is a schematic flowchart of an intermittent cooperative interference method based on a WLAN protocol according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an intermittent cooperative jamming device based on a WLAN protocol according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
To better explain the scheme of the present invention, first, the data frame structure of the WLAN protocol is briefly introduced by taking IEEE 802.11n as an example. Referring to fig. 1, according to the IEEE 802.11n protocol, data transmitted by a higher layer is encapsulated as a data payload by a Medium Access Control (MAC) layer, a Physical media coverage Process (PLCP) layer and a Physical Media Dependent (PMD) layer, and then a data frame of the Physical layer is formed. The header of each DATA frame contains a Preamble and a SIGNAL, followed by a DATA field (DATA). The header preamble consists of a legacy preamble and a High-Throughput preamble, both of which include a Short Training Sequence (STF) and a Long Training sequence (LTF), wherein the High-Throughput Long LTF is responsible for channel noise estimation and is essential for demodulation of subsequent data fields.
The following embodiments of the present invention provide an intermittent cooperative interference method and apparatus based on a WLAN protocol.
Referring to fig. 2, the intermittent cooperative interference method based on the WLAN protocol provided in the embodiment of the present invention specifically includes the following steps:
s100: calculating the transmission time of a legal sending end for sending a data frame and calculating the total number of samples according to the transmission time of the data frame;
in this step, the legal sending end (Alice) sends a message to the legal receiving end (Bob), and the message length is LmessageA byte. The legal sending end (Alice) encapsulates the message according to the structure shown in fig. 1, encapsulates the message in the payload of the MAC frame, and sends the encapsulated data frame to the legal receiving end (Bob), where it needs to be noted that the message length is the number of bytes occupied by the message sent by the legal sending end to the legal receiving end.
When calculating the transmission time of a legal sending end for sending data frames, the total number of the data frames corresponding to the message length, the idle time between two data frames and the time length of the data frames need to be calculated first; determining the transmission time of the data frame according to the total number of the data frames corresponding to the message length, the idle time between two data frames and the time length of the data frame, specifically comprising:
the maximum length of a Medium Data Service Unit (MSDU) of the MAC layer is denoted as LMSDUA number of bytes, the total number of data frames required to transmit the entire message, NframeCalculated according to the following formula:
the number of bytes of zero padding bits of the last MSDU is
The time length of the whole signal is tsignal＝Nframe*(tframe+tidle)；
Wherein, tidleThe idle time between two data frames can be set by self according to the channel bandwidth; t is tframeIs the time length of one data frame.
It should be noted that the time length of the entire signal is the transmission time.
The data frame is composed of a preamble and a SIGNAL with fixed length and a data field with variable length, wherein the length of the data field is divided into a plurality of OFDM symbols for transmission after the transmission rate is determined according to the modulation mode given by the SIGNAL, the duration of each OFDM symbol is 4 mus, therefore, the final frame length depends on the number of the OFDM (access protocol) symbols and is calculated as tframe＝(36+Nsym4) μ s, wherein,
is the total number of data fields converted into OFDM symbols. Length is the number of bytes of the data payload given by Signal, 6 is the number of tail bits of the data field, LDBPSIs the number of data bits that each OFDM symbol specified by SIGNAL may contain.
When the total number of samples is calculated according to the transmission time of the data frames, the total number of the data frames corresponding to the message length is calculated and the sampling rate is determined; the total number of data frames corresponding to the message length is NframeThe sampling rate is set according to the requirement, and the sampling rate is expressed as f in the embodiments。
Determining the total number of samples according to the total number of the data frames, the transmission time of the data frames and the sampling rate, specifically:
Ns＝Nframetframefs；
wherein N issIs the total number of samples of the entire transmitted signal, the total number of samples per data frame being
S200: determining an interference power of intermittent cooperative interference based on the adoption total;
in this step, the signal envelopes of the transmission signal and the cooperative interference signal are represented as s (t) and s, respectivelyj(t) of (d). The channel between transceiving is denoted as habWherein a ∈ { A, J } represents a legal sending end Alice and a cooperative interference source Charlie, B ∈ { B, E } represents a legal receiving end Bob and an eavesdropper Eves(e.g., 20MHz), the discrete expressions of the received signals of Bob and Eve can be obtained as follows:
rB(k)＝hABs(k)+hJBβ(k)sj(k)+nB(k),1≤k≤Ns；
rE(k)＝hAEs(k)+hJEβ(k)sj(k)+nE(k),1≤k≤Ns；
wherein N (k) is a mean of 0 and a variance of N0Is a discrete expression of additive white gaussian noise. N is a radical ofsβ (k) indicates whether a cooperative interferer is present at the kth sampling interval.
The value of β (k) is different according to different cooperative interference schemes. Specifically, in the continuous cooperative interference scheme, β (k) is always equal to 1. For an Intermittent interference Scheme (IJS), the value of β (k) is 1 or 0, which may be determined or random.
The signal transmitted by the cooperative interferer may be considered to be impulsive interference, where the width of an impulse represents the duration of the interfering signal, and the impulse durationThe duty cycle determines the length of the interference interval during which no interfering signal is transmitted. Wherein,
pulse width, | s, representing cooperative interference signalsj(k)|2Representing the amplitude of the pulse.
Determining the interference power of the intermittent cooperative interference according to the pulse width of the interference signal of the intermittent cooperative interference and the pulse amplitude of the interference signal, wherein the calculation formula of the interference power is as follows:
wherein,
pulse width, | s, representing cooperative interference signalsj(k)|2Representing the amplitude of the pulse. The total consumed interference energy needs to meet the available interference energy
Is limited by
S300: confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power;
in this step, for an interference pulse having a certain width, a higher interference power means that the probability that the bit affected by the interference pulse is erroneously decoded is higher. This interference effect, which is influenced by the interference power, can be regarded as an additive effect. The maximum value of the error probability is 0.5, and after a certain threshold value is exceeded, the increase of the interference power will not cause more errors, which may be called ceiling effect (ceiling effect). This ceiling effect can be eliminated by attenuating the intensity of the interference pulses and increasing the range of influence of the interference pulses. In one aspect, the excess interference strength may be used to interfere with more discrete signal samples. On the other hand, since the transmitted signal is multi-ary modulated, if only one bit is erroneous, it means that the whole symbol is erroneous, and dividing a wide interference pulse into a plurality of narrower pulses can enhance the interference effect.
Therefore, more interference pulses mean more errors, which can be seen as a multiplication effect (multiplyingeffect). Thus, the present embodiment provides three different interference modes to determine the width and number of interference pulses, where the three different interference modes include: periodic single pulse interference, periodic multi-pulse interference, and random multi-pulse interference.
(1) Periodic single pulse interference (periodicaljamming, PerJ):
in periodic monopulse interference, only one interference pulse is transmitted during the transmission of each data frame, and the interference pulse is repeated for each frame. For a single interference pulse, the interference duration and the interference interval are respectively denoted tdAnd tvAnd satisfy td+tv＝tframe. Specifically, for the nth data frame, the value of the sampling indication function of the cooperative interference signal is as follows:
wherein,
is the total number of data samples per frame. This single-pulse interference approach concentrates the interference power in a block fashion.
(2) Periodic multi-pulse interference (repeat Jamming, RepJ):
in periodic multi-pulse interference, a plurality of interference pulses are transmitted during the transmission of each data frame and are repeated for each data frame, so that the interference pulse duration and the interference interval satisfy Npulse*(td+tv)＝tframe. For the nth data frame, the cooperative interference signalThe value of the sampling indication function is as follows:
the periodic multi-pulse interference disperses the interference power into a plurality of blocks in a relatively centralized mode, each block can cause more errors, and the capability of protecting key information is improved.
(3) Random multi-pulse interference (Randomly Jamming, RanJ):
the erroneous symbols caused by the interference pattern of fixed interference duration and fixed interference interval may be concentrated in areas that are not of interest to some eavesdroppers, who are confused by random multi-pulse interference in order to obtain more scattered erroneous symbols over the whole frame. Where β (k) takes a value randomly between {0,1}, in which case the interference duration and interference interval are dynamically changing, i.e.:
wherein K is the set [1, Ns]Each element being from the set [1, N ]s]Wherein the selection is carried out at random,
is the complement of K and satisfies
For a received signal, the eavesdropper is most interested in the data field of the signal containing legitimate information, and therefore the most straightforward approach is to disturb the data field. However, according to the protocol, an eavesdropper needs to know the channel estimation result obtained from the preamble when demodulating the data field, and the estimation result can be more effectively hidden from legal information once the interference preamble is disturbed. On this basis, the present embodiment provides three different interference locations, including: preamble, data field, and full frame.
(1) IJS for Preamble (Preamble-Targeted IJS, PT-IJS):
according to the frame structure of the WLAN protocol data frame, the preamble of the data frame is used for channel estimation, including channel estimation results on noise level and channel gain, which are crucial for demodulation of the data field. The preamble signal is altered to increase the noise level of its channel estimate by interfering with the preamble. Then the interfered result is used for demodulating the data field to cause decoding errors, and the most serious result is that the decoding process is completely equal to random decision, so that the symbol error rate is 0.5 at the maximum. By setting the interference duration of a periodic single burst to be equal to the time length of the preamble HT-LTF field, i.e., td＝tHTLTFThe specific values of β (k) for the interference of the preamble can be:
(2) IJS for Data field (Data-Targeted IJS, DT-IJS):
since the data field is of most interest to the eavesdropper, the eavesdropper may bypass the preamble field to collect the key information of the data field directly, and interfere with the data field to prevent information leakage in this case. By injecting interference noise into the data field, the complex envelope of the signal received by the eavesdropper is changed, the decoding result is further changed, and an error code is caused. Because the duration of the data field is longer than that of the preamble field, the three interference modes of the previous section can be adopted to obtain a better interference effect, and no interference signal is transmitted during the transmission of the preamble field, so the specific values of β (k) are as follows:
(3) IJS for full Frame (Frame-Targeted IJS, FT-IJS):
combining the advantages and disadvantages of IJS for the preamble and IJS for the data field, IJS for the entire data frame enables the interference signal to be overlaid to the preamble and data field of each data frame. In this case, the random multi-pulse interference method is most suitable, which not only relaxes the requirement for time synchronization, but also can cause double interference to the signal received by Eve of the eavesdropper.
S400: and determining an interference mode and an interference position for intermittent cooperative interference.
In this step, an intermittent cooperative interference mechanism is determined. In connection with the interference effect and the practicality of the interfering pulse signal, a table of matching different interference patterns with the interference location is provided, table 1, in which the matching result indicates the applicability of each IJS, representing by which way to which field to interfere, as per jp means to interfere with the preamble field in a periodic single pulse. In general, for interference of preamble field, periodic single burst interference is the best way, and if the whole frame is targeted for interference, random multiple burst interference is the best way.
TABLE 1 intermittent cooperative jamming mechanism with interference location and interference mode matching
As can be seen from the above description, in the intermittent cooperative interference method based on the WLAN protocol provided in the embodiment of the present invention, the transmission time of the data frame sent by the legal sending end is calculated, and the total number of samples is calculated according to the transmission time of the data frame; determining an interference power of intermittent cooperative interference based on the adoption total; confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power; an interference mode and an interference position are determined for intermittent cooperative interference, a data frame structure of a WLAN protocol can be combined with a cooperative interference scheme, an intermittent interference signal is generated to efficiently interfere a receiving signal of an eavesdropper, and the safe transmission of a legal signal is effectively ensured.
An embodiment of the present invention provides an intermittent cooperative interference apparatus based on a WLAN protocol, and referring to fig. 3, the apparatus specifically includes:
the calculating unit 10 is configured to calculate transmission time for a legal sending end to send a data frame and calculate a total number of samples according to the transmission time of the data frame;
an interference power unit 20, configured to determine an interference power of the intermittent cooperative interference based on the total number of adoption;
the interference unit 30 is configured to determine at least two interference modes and at least two interference positions of the intermittent cooperative interference according to the interference power;
and the selecting unit 40 is used for determining an interference mode and an interference position to perform intermittent cooperative interference.
Wherein the calculation unit 10 comprises:
the calculating subunit is used for calculating the total number of the data frames corresponding to the message length, the idle time between the two data frames and the time length of the data frames;
the determining subunit is used for determining the transmission time of the data frame according to the total number of the data frames corresponding to the message length, the idle time between the two data frames and the time length of the data frame;
the message length is the number of bytes occupied by the message sent to the legal receiving end by the legal sending end.
Wherein the calculation unit 10 comprises:
the sampling rate subunit is used for calculating the total number of the data frames corresponding to the message length and determining the sampling rate;
and the total sampling subunit is used for determining the total number of the samples according to the total number of the data frames, the transmission time of the data frames and the sampling rate.
The interference power unit 20 includes:
the pulse subunit is used for determining the pulse width of the interference signal of the intermittent cooperative interference and the pulse amplitude of the interference signal;
and the interference power subunit is used for determining the interference power of the intermittent cooperative interference according to the pulse width of the interference signal of the intermittent cooperative interference and the pulse amplitude of the interference signal.
Wherein the interference mode comprises: periodic single pulse interference, periodic multi-pulse interference, and random multi-pulse interference.
Wherein the interference location comprises: preamble, data field, and full frame.
The embodiment of the intermittent cooperative interference apparatus based on the WLAN protocol provided by the present invention may be specifically used for executing the processing procedure of the embodiment of the intermittent cooperative interference method based on the WLAN protocol in the above embodiment, and the function of the processing procedure is not described herein again, and reference may be made to the detailed description of the embodiment of the method.
According to the technical scheme, the intermittent cooperative interference device based on the WLAN protocol combines the design of the WLAN data frame structure and the cooperative interference mechanism to achieve the purpose of efficiently interfering an eavesdropper. The periodic single-pulse interference mechanism for the lead code can enable the received signal of an eavesdropper to reach the maximum bit error rate with very little energy, and can effectively prevent the eavesdropper from tracking the interference signal. The intermittent cooperative interference mechanism has various choices, can be selected according to different communication conditions, flexibly prevents eavesdropping, has higher safety energy efficiency, and has better practicability in the Internet of things.
An embodiment of the present invention provides an electronic device, and referring to fig. 4, the electronic device may include: a processor (processor)810, a communication Interface 820, a memory 830 and a communication bus 840, wherein the processor 810, the communication Interface 820 and the memory 830 communicate with each other via the communication bus 840. The processor 810 may call logic instructions in the memory 830 to perform the following method: calculating the transmission time of a legal sending end for sending a data frame and calculating the total number of samples according to the transmission time of the data frame; determining an interference power of intermittent cooperative interference based on the adoption total; confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power; and determining an interference mode and an interference position for intermittent cooperative interference.
In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
An embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the method provided by the above method embodiments, for example, the method includes: calculating the transmission time of a legal sending end for sending a data frame and calculating the total number of samples according to the transmission time of the data frame; determining an interference power of intermittent cooperative interference based on the adoption total; confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power; and determining an interference mode and an interference position for intermittent cooperative interference.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means/systems for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the present invention may be utilized alone or in combination with one or more other aspects and/or embodiments thereof.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. An intermittent cooperative interference method based on a WLAN protocol is characterized by comprising the following steps:
calculating the transmission time of a legal sending end for sending a data frame and calculating the total number of samples according to the transmission time of the data frame;
determining an interference power of intermittent cooperative interference based on the adoption total;
confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power;
and determining an interference mode and an interference position for intermittent cooperative interference.
2. The WLAN protocol-based intermittent cooperative jamming method according to claim 1, wherein the calculating the transmission time of the data frame sent by the legal sending end includes:
calculating the total number of data frames corresponding to the message length, the idle time between two data frames and the time length of the data frames;
determining the transmission time of the data frames according to the total number of the data frames corresponding to the message length, the idle time between the two data frames and the time length of the data frames;
the message length is the number of bytes occupied by the message sent to the legal receiving end by the legal sending end.
3. The WLAN protocol based intermittent cooperative jamming method according to claim 1, wherein the calculating a total number of samples according to the transmission time of the data frame comprises:
calculating the total number of data frames corresponding to the message length and determining the sampling rate;
and determining the total number of samples according to the total number of the data frames, the transmission time of the data frames and the sampling rate.
4. The WLAN protocol based intermittent cooperative jamming method according to claim 1, wherein the determining the interference power of the intermittent cooperative jamming based on the total number of adopted comprises:
determining the pulse width of an interference signal of intermittent cooperative interference and the pulse amplitude of the interference signal;
and determining the interference power of the intermittent cooperative interference according to the pulse width of the interference signal of the intermittent cooperative interference and the pulse amplitude of the interference signal.
5. The intermittent cooperative jamming method based on the WLAN protocol as claimed in claim 1, wherein the jamming manner comprises: periodic single pulse interference, periodic multi-pulse interference, and random multi-pulse interference.
6. The intermittent cooperative jamming method based on WLAN protocol as claimed in claim 1, wherein the jamming location comprises: preamble, data field, and full frame.
7. An intermittent cooperative jamming device based on a WLAN protocol, comprising:
the calculating unit is used for calculating the transmission time of the data frame sent by the legal sending end and calculating the total number of samples according to the transmission time of the data frame;
an interference power unit for determining an interference power of the intermittent cooperative interference based on the total number of adoption;
the interference unit is used for confirming at least two interference modes and at least two interference positions of intermittent cooperative interference according to the interference power;
and the selecting unit is used for determining an interference mode and an interference position to perform intermittent cooperative interference.
8. The WLAN protocol based intermittent cooperative jamming device of claim 7, wherein the computing unit comprises:
the calculating subunit is used for calculating the total number of the data frames corresponding to the message length, the idle time between the two data frames and the time length of the data frames;
the determining subunit is used for determining the transmission time of the data frame according to the total number of the data frames corresponding to the message length, the idle time between the two data frames and the time length of the data frame;
the message length is the number of bytes occupied by the message sent to the legal receiving end by the legal sending end.
9. An electronic device, comprising: a processor, a memory, a communication interface, and a communication bus; wherein,
the processor, the communication interface and the memory complete mutual communication through a communication bus;
the processor is configured to invoke logic instructions in the memory to perform the WLAN protocol based intermittent cooperative jamming method of any of claims 1-6.
10. A non-transitory computer readable storage medium storing computer instructions that cause the computer to perform the WLAN protocol based intermittent cooperative jamming method of any one of claims 1-6.
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