CN113708884B - Forwarding interference method for illegal use of mobile terminal in confidential meeting place - Google Patents
Forwarding interference method for illegal use of mobile terminal in confidential meeting place Download PDFInfo
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- CN113708884B CN113708884B CN202010440633.XA CN202010440633A CN113708884B CN 113708884 B CN113708884 B CN 113708884B CN 202010440633 A CN202010440633 A CN 202010440633A CN 113708884 B CN113708884 B CN 113708884B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/65—Jamming involving special techniques using deceptive jamming or spoofing, e.g. transmission of false signals for premature triggering of RCIED, for forced connection or disconnection to/from a network or for generation of dummy target signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a forwarding interference method of a mobile terminal for illegal use in a confidential meeting place, which comprises the following steps: sequentially receiving p 5G wireless signals with the frequency band number of n, and obtaining p n frequency band receiving data through analog-to-digital conversion; sequentially writing the ith frequency band data of the qth n frequency band received data into a storage unit, and covering the ith frequency band data of the qth-1 full frequency band received data in the storage unit, wherein q is more than or equal to 1 and less than or equal to p, and i is more than or equal to 1 and less than or equal to n; according to the delay amount, the reading address of the ith frequency band data in the storage unit is calculated, all the frequency band data in the storage unit are read to obtain data to be transmitted, digital-to-analog conversion is carried out on each data to be transmitted, and interference signals of each frequency band are transmitted to the air. The invention realizes the real-time processing of the high-speed and low-delay 5G NR signals, has low algorithm complexity and higher interference efficiency, does not influence the normal use of other users, has lower required interference-to-signal ratio and lower transmitting power, and meets the requirements of environmental protection and energy conservation.
Description
Technical Field
The invention relates to the field of mobile communication, in particular to a forwarding interference method of a mobile terminal for illegal use in a confidential meeting place.
Background
Compared with the prior generation mobile communication technology, the 5G, namely the fifth generation mobile communication technology, greatly improves the user communication rate, increases the connection density, reduces the time delay from end to end and enhances the mobility of the receiving and transmitting parties. While 5G brings convenience to our production and life, various potential safety hazards exist, and especially in heavy-point areas such as secret meeting places of government and military departments, the problem of secret leakage caused by illegal use of mobile terminals is increasingly prominent. The mobile communication link interference technology aiming at the key area blocks the communication between the user and the public network by transmitting a specific shielding signal so as to achieve the aim of security and confidentiality of the key area.
The existing mobile communication link interference scheme mostly adopts suppression type interference, namely, high-power sweep frequency signals are sent on all mobile communication frequency bands, wireless signals of a present network are suppressed, and communication between a mobile terminal and a public network is cut off. The scheme mainly has the following problems: in a complex wireless environment with multiple mixed systems, the effective interference radius is too small, and the interference efficiency is not high; and the uplink is interfered, so that normal use of users outside the control area is affected. In addition, the interference signal of the pressed interference is higher, the power of the interference signal is higher, and the damage to the health of human bodies is easy to cause.
Although chinese patent application CN109889301a discloses a 5G green wireless signal shielding device and a shielding method thereof, which uses PSS interference sequences, SSS interference sequences, and PBCH DMRS interference sequences to solve the above problems to some extent, the algorithm is complex, and multiple interference sequences need to be generated. Therefore, there is an urgent need for a simple, efficient, low power consumption 5G signal shielding method.
Disclosure of Invention
In order to solve the above problems, the present invention proposes a method for forwarding interference for illegal use of mobile terminals in a confidential meeting place, which performs forwarding interference by collecting and storing current network signals, that is, copying received signals, including delay, scaling and other processes, and then transmitting the signals to deceive the mobile terminals, so that the mobile terminals cannot establish connection with a real base station, thereby achieving the purpose of interfering with a mobile communication link.
A forwarding interference method for a mobile terminal for illegal use includes the steps:
1) Sequentially receiving p 5G wireless signals with the frequency band number of n, and obtaining p n frequency band receiving data through analog-to-digital conversion;
2) Sequentially writing the ith frequency band data of the qth n frequency band received data into a storage unit, and covering the ith frequency band data of the qth-1 full frequency band received data in the storage unit, wherein q is more than or equal to 1 and less than or equal to p, and i is more than or equal to 1 and less than or equal to n;
3) According to the delay amount, calculating a reading address of the ith frequency band data in the storage unit, and reading all frequency band data in the storage unit to obtain data to be transmitted;
4) And D, performing digital-to-analog conversion on each data to be transmitted, and transmitting interference signals of each frequency band to the air.
Further, the full-band 5G wireless signal before the analog-to-digital conversion is preprocessed by the following steps:
1) Mixing the signals of each frequency band of the full-frequency band 5G wireless signals;
2) And filtering and amplifying each mixed signal.
Further, the memory cells integrate one or more double rate synchronous dynamic random access memories.
Further, the receiving and transmitting are alternated; the total time T=n+n+n.t2 of receiving the 5G wireless signal with the frequency band number n and transmitting n ith frequency band interference signals, T1 is the time of receiving a band data, and T2 is the time of transmitting a band interference signal.
Further, all the frequency band data in the storage unit are read by the following steps:
1) Reading the band data backward from the reading address of the ith band data;
2) After finishing reading the following frequency band data, circularly reading the frequency band data from the initial address;
3) When the reception time window is reached, reading is stopped.
Further, the delay amount is obtained by:
1) Receiving a frequency band sample signal of the 5G wireless signal, and obtaining sample receiving data through analog-to-digital conversion;
2) Writing the sample receiving data into a storage unit and reading the sample receiving data to obtain sample data to be sent;
3) And calculating the delay amount of the same frame of the sample interference signal obtained through digital-to-analog conversion and the 5G current network signal in the time domain.
Further, each interference signal after digital-to-analog conversion is processed by:
1) Mixing the interference signals;
2) And filtering and amplifying each mixed interference signal.
Further, the power of the i-th frequency band interference signal is larger than the power of the i-frequency band of the current network 5G wireless signal.
A tamper-oriented forwarding interference system for a illicit use mobile terminal, comprising:
1) The receiving antenna module is used for receiving p 5G wireless signals with the frequency band number of n;
2) The broadband radio frequency transceiver module is used for carrying out analog-to-digital conversion on p 5G wireless signals with the frequency band number of n to obtain p n frequency band receiving data, and carrying out digital-to-analog conversion on each transmitting data to obtain each interference signal;
3) The storage module is used for storing the data of each frequency band;
4) The baseband processing module is used for writing the ith frequency band data of the (q) th n frequency band received data into the storage unit in sequence, covering the ith frequency band data of the (q-1) th full frequency band received data in the storage unit, wherein q is more than or equal to 1 and less than or equal to p, i is more than or equal to 1 and less than or equal to n, calculating the reading address of the ith frequency band data according to the delay amount, and reading all frequency band data in the storage unit to obtain data to be transmitted;
5) And the transmitting antenna module is used for transmitting each interference signal.
Further, the baseband processing module includes:
1) The sweep frequency control sub-module is used for configuring the receiving parameters of the broadband radio frequency transceiver module in turn;
2) A read-write state sub-module for interacting with the data of the memory module;
3) A dynamic adjustment sub-module for calculating a delay amount;
4) The gain control sub-module is used for adjusting the power of the interference signal.
Compared with the prior art, the invention has the advantages that:
(1) And a broadband radio frequency transceiver and a large-capacity storage unit are used for realizing real-time processing of the high-speed and low-delay 5G NR signals.
(2) Different modulation patterns do not need to be distinguished, the algorithm complexity is low, and the implementation is simple.
(3) The interference efficiency is higher, and the normal use of other users is not influenced. After analysis of the electromagnetic environment in the shielding area, a specific forwarding interference signal is emitted, so that the influence on normal communication outside the area is small.
(4) Compared with noise suppression type interference, the invention has the advantages of lower interference-to-signal ratio and lower transmitting power, and meets the requirements of environmental protection and energy conservation.
Drawings
FIG. 1 is a block diagram of the system of the present invention.
Fig. 2 is a schematic diagram of a transceiver switch of the broadband radio frequency transceiver module.
Fig. 3 is a flow chart of a dynamic adjustment transmit time window of a wideband radio frequency transceiver module.
Detailed Description
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
The invention provides a forwarding interference method and a forwarding interference system for a mobile terminal for illegal use, and fig. 1 is a schematic diagram of system composition.
The invention discloses a forwarding interference method for a mobile terminal for illegal use, which comprises the following steps:
1) Receiving a full-band 5G NR (New Radio New air interface) wireless signal of an environment space, and obtaining a digital intermediate frequency signal after mixing, filtering, amplifying and analog-to-digital conversion;
2) In a receiving and transmitting period, the processing flow is shown in figure 2, and the receiving paths of the broadband radio frequency receiving and transmitting units are configured in turn;
3) Sequentially writing current network data of N frequency bands acquired by a plurality of receiving time windows into corresponding storage units, wherein the receiving time window of a single frequency band is set to be the length (20 ms) of two wireless frames;
4) In the transmitting time window, circularly reading the signal data of the full frequency band in the storage unit; in order to achieve the best interference effect, the transmitted interference signal and the current network signal need to be aligned in a frame mode in the time domain;
because the data is written into and read out of delay, the data read out and forwarded directly from the initial memory address is not in frame alignment, the invention changes the first read address of the memory cell by a dynamic adjustment method to dynamically change the sending time window so as to ensure that the first read data meets the frame alignment requirement, and then circularly reads from the initial memory address, as shown in figure 3;
5) Performing digital-to-analog conversion, frequency mixing, filtering and amplification on the signal to be transmitted, which is taken out of the storage unit;
6) After digital-to-analog conversion, frequency mixing, filtering and amplification are carried out on signals to be transmitted, the signals are transmitted to the air through a transmitting antenna, and interference is implemented; in order to achieve effective interference, the power of the interfering signal should be greater than the signal strength of the frequency band in ambient space.
A system for forwarding interference for illicit use of mobile terminals, the system comprising: the device comprises a receiving antenna module, a transmitting antenna module, a broadband radio frequency transceiver module, a baseband processing module and a mass storage module.
The receiving antenna module is used for receiving the 5G NR signal in the electromagnetic space.
The broadband radio frequency transceiver module comprises a receiving path module and a transmitting path module, wherein the receiving path module integrates a frequency mixer, a filter, an amplifier, an A/D converter and other submodules, and performs down-conversion, broadband filtering, amplification, A/D conversion and other treatments on electromagnetic signals received by an antenna; the transmitting path module integrates a frequency mixer, a filter, an amplifier, a D/A converter and other sub-modules, and performs D/A conversion, up-conversion, broadband filtering, amplification and other processes on the data transmitted by the baseband processing module.
The baseband processing module is used for completing the storage and forwarding of the baseband digital signals and comprises a sweep frequency control sub-module, a read-write state sub-module, a gain control sub-module and a dynamic adjustment sub-module. The sweep frequency control sub-module configures receiving parameters of the broadband radio frequency transceiver module in turn to complete the scanning control of a plurality of 5G NR frequency bands. The read-write state sub-module realizes the data interaction with the large-capacity storage unit and completes the storage of the high-speed and low-time delay network data. The gain control sub-module is used for amplifying and shrinking the extracted current network signal and adjusting the power of the interference signal. The dynamic adjustment sub-module enables dynamic adjustment of the transmit time window by changing the read address of the mass storage unit.
The mass memory module integrates multiple DDR SDRAM (double Rate synchronous dynamic random Access memory) to store high throughput data.
The transmitting antenna is used for transmitting the interference signal.
A forwarding interference device for a illicit use mobile terminal, the device comprising: receiving antenna, transmitting antenna, broadband radio frequency receiving and transmitting unit, baseband processing unit, mass storage unit:
1) The receiving antenna is used for receiving the full-band 5G NR wireless signals of the environment space acquired by the antenna, and obtaining digital intermediate frequency signals after mixing, filtering, amplifying and analog-to-digital conversion by the broadband radio frequency transceiver;
2) The baseband processing unit integrates frequency sweep control, read-write state machine, gain control, dynamic adjustment and other subunits;
the sweep frequency control subunit is used for configuring the receiving channels of the broadband radio frequency receiving and transmitting units in turn, and the read-write state machine sequentially writes the current network data of N frequency bands acquired by the plurality of receiving time windows into the corresponding storage units; the single band reception time window is set to the length of two radio frames (20 ms);
the read-write state machine is used for circularly reading the signal data of the full frequency band in the storage unit in the transmission time window;
for optimal interference, the transmitted interference signal must be frame aligned with the current network signal in the time domain. Data read directly from the initial memory address and forwarded is not frame aligned due to delays in data writing and reading; the dynamic adjustment subunit is configured to change the first read address of the storage unit to dynamically change the sending time window, so as to ensure that the first read data meets the requirement of frame alignment, and then circularly read from the initial storage address;
the gain control subunit is used for amplifying and shrinking the data taken out by the storage unit and transmitting the data in each frequency band with certain power, and in order to realize effective interference, the power of an interference signal is larger than the signal intensity of the frequency band in the environment space;
3) The broadband radio frequency transceiver is used for performing digital-to-analog conversion, frequency mixing, filtering and amplification on signals to be transmitted;
4) The transmitting antenna is used for sending signals into the air to implement interference.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and those skilled in the art may modify or substitute the technical solution of the present invention without departing from the spirit and scope of the present invention, and the protection scope of the present invention shall be defined by the claims.
Claims (10)
1. A method for forwarding interference of a mobile terminal for illegal use of a secret-related conference place comprises the following steps:
1) Sequentially receiving p 5G wireless signals with the frequency band number of n, and obtaining p n frequency band receiving data through analog-to-digital conversion;
2) Sequentially writing the ith frequency band data of the qth n frequency band received data into a storage unit, and covering the ith frequency band data of the qth-1 full frequency band received data in the storage unit, wherein q is more than or equal to 1 and less than or equal to p, and i is more than or equal to 1 and less than or equal to n;
3) According to the delay amount, calculating a reading address of the ith frequency band data in the storage unit, and reading all frequency band data in the storage unit to obtain data to be transmitted;
4) And D, performing digital-to-analog conversion on each data to be transmitted, and transmitting interference signals of each frequency band to the air.
2. The method of claim 1, wherein the full band 5G wireless signal prior to analog-to-digital conversion is pre-processed by:
1) Mixing the signals of each frequency band of the full-frequency band 5G wireless signals;
2) And filtering and amplifying each mixed signal.
3. The method of claim 1, wherein the memory cells integrate one or more double rate synchronous dynamic random access memories.
4. The method of claim 1, wherein receiving and transmitting are alternating; the total time T=n+n '. Times.t1+n 2 of receiving the 5G wireless signal with the frequency band number of n and transmitting n' ith frequency band interference signals, T1 is the time of receiving one frequency band data, and T2 is the time of transmitting one frequency band interference signal.
5. The method of claim 4, wherein all the band data in the memory unit are read by:
1) Reading the band data backward from the reading address of the ith band data;
2) After finishing reading the following frequency band data, circularly reading the frequency band data from the initial address;
3) When the reception time window is reached, reading is stopped.
6. The method of claim 1, wherein the delay amount is obtained by:
1) Receiving a frequency band sample signal of the 5G wireless signal, and obtaining sample receiving data through analog-to-digital conversion;
2) Writing the sample receiving data into a storage unit and reading the sample receiving data to obtain sample data to be sent;
3) And calculating the delay amount of the same frame of the sample interference signal obtained through digital-to-analog conversion and the 5G current network signal in the time domain.
7. The method of claim 1, wherein each of the interference signals after digital-to-analog conversion is processed by:
1) Mixing the interference signals;
2) And filtering and amplifying each mixed interference signal.
8. The method of claim 1, wherein the power of the i-th band interfering signal is greater than the power of the i-band of the current network 5G wireless signal.
9. A tamper-evident system for a offending use mobile terminal at a confidential meeting location, comprising:
1) The receiving antenna module is used for receiving p 5G wireless signals with the frequency band number of n;
2) The broadband radio frequency transceiver module is used for carrying out analog-to-digital conversion on p 5G wireless signals with the frequency band number of n to obtain p n frequency band receiving data, and carrying out digital-to-analog conversion on each transmitting data to obtain each interference signal;
3) The storage module is used for storing the data of each frequency band;
4) The baseband processing module is used for writing the ith frequency band data of the (q) th n frequency band received data into the storage unit in sequence, covering the ith frequency band data of the (q-1) th full frequency band received data in the storage unit, wherein q is more than or equal to 1 and less than or equal to p, i is more than or equal to 1 and less than or equal to n, calculating the reading address of the ith frequency band data according to the delay amount, and reading all frequency band data in the storage unit to obtain data to be transmitted;
5) And the transmitting antenna module is used for transmitting each interference signal.
10. The system of claim 9, wherein the baseband processing module comprises:
1) The sweep frequency control sub-module is used for configuring the receiving parameters of the broadband radio frequency transceiver module in turn;
2) A read-write state sub-module for interacting with the data of the memory module;
3) A dynamic adjustment sub-module for calculating a delay amount;
4) The gain control sub-module is used for adjusting the power of the interference signal.
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| CN202010440633.XA CN113708884B (en) | 2020-05-22 | 2020-05-22 | Forwarding interference method for illegal use of mobile terminal in confidential meeting place |
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| CN202010440633.XA CN113708884B (en) | 2020-05-22 | 2020-05-22 | Forwarding interference method for illegal use of mobile terminal in confidential meeting place |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130010830A (en) * | 2012-05-22 | 2013-01-29 | 엘아이지넥스원 주식회사 | Method for jamming signal |
| CN103607254A (en) * | 2013-11-21 | 2014-02-26 | 三维通信股份有限公司 | System and method for shielding mobile phone signal by adoption of store-and-forward |
| CN103795474A (en) * | 2014-03-05 | 2014-05-14 | 北京中科飞鸿科技有限公司 | Signal interference method and device |
| WO2018032998A1 (en) * | 2016-08-16 | 2018-02-22 | 大唐移动通信设备有限公司 | Signal interference apparatus and method |
| CN109889301A (en) * | 2019-03-11 | 2019-06-14 | 武汉虹信通信技术有限责任公司 | The shielding device and its screen method of 5G green wireless signal |
-
2020
- 2020-05-22 CN CN202010440633.XA patent/CN113708884B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130010830A (en) * | 2012-05-22 | 2013-01-29 | 엘아이지넥스원 주식회사 | Method for jamming signal |
| CN103607254A (en) * | 2013-11-21 | 2014-02-26 | 三维通信股份有限公司 | System and method for shielding mobile phone signal by adoption of store-and-forward |
| CN103795474A (en) * | 2014-03-05 | 2014-05-14 | 北京中科飞鸿科技有限公司 | Signal interference method and device |
| WO2018032998A1 (en) * | 2016-08-16 | 2018-02-22 | 大唐移动通信设备有限公司 | Signal interference apparatus and method |
| CN109889301A (en) * | 2019-03-11 | 2019-06-14 | 武汉虹信通信技术有限责任公司 | The shielding device and its screen method of 5G green wireless signal |
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