CN105553490A - Green mobile communication interference device and method - Google Patents
Green mobile communication interference device and method Download PDFInfo
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- CN105553490A CN105553490A CN201510969771.6A CN201510969771A CN105553490A CN 105553490 A CN105553490 A CN 105553490A CN 201510969771 A CN201510969771 A CN 201510969771A CN 105553490 A CN105553490 A CN 105553490A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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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
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a green mobile communication interference device and method. The method comprises the following steps: receiving a space base station signal, and resolving a BCH (Broadcast Channel) of a base station through a frequency conversion receiving unit, an anti-aliasing filtering unit, an A/D acquisition unit, a digital demodulation unit, a channel decoding unit and a BCH analysis unit; generating a business establishment rejection message through a business establishment rejection message generation unit; attaching the business establishment rejection message generated by the business establishment rejection message generation unit to the BCH through a BCH signaling addition unit; and transmitting a base station signal carrying the business establishment rejection message of the BCH through an encoding unit, a digital modulation unit, a shape filtering unit, a D/A conversion unit, an IQ modulation unit, a variable filtering unit and a gain control unit. According to the device and the method, new signaling is added on the BCH of the existing space base station signal, so that green mobile communication interference is realized.
Description
Technical field
The present invention relates to the communications field, especially a kind of green mobile Communication Jamming device and interference method thereof.
Background technology
Along with the continuous enhancing of confidential notions, all kinds of meeting and examination adopt full frequency band interference unit to prevent mobile phone to divulge a secret to be a commonplace phenomenon.Interference unit has two kinds of technical schemes at present, a kind of be in the course of the work with certain speed from the low end frequency of forward channel to high-end scanning, this sweep speed can receive in message signals at mobile phone and form mess code interference, mobile phone can not detect the normal data sent from base station, mobile phone can not be set up with base station and connect.Another is the frequency range for current mobile phone accepted standard and work, and utilize wideband A WGN noise or modulation signal to carry out specific aim interference, its object is also allow mobile phone not receive signal, and the form of expression of mobile phone is the phenomenon such as search network, no signal.These two kinds of interferometer main features all can launch one or more interference signals, are flooded by the Received signal strength of mobile phones all in the area of coverage, have blocked mobile phone and an extraneous cutting link, have made mobile phone realize communication function.Make spacing wave originally become more complicated, bring Contamination of Electromagnetic Wave to our living environment.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention disturbs the mobile phone signal in certain limit, both plays privacy functions, does not affect again our living environment, and therefore, this patent is referred to as the interference of green ripple mobile communication.
The present invention adopts following technical scheme:
A kind of green mobile Communication Jamming device, comprises the following structure be communicated with successively:
Frequency conversion receiving element, for receiving space base station signal;
Anti-aliasing filter unit, for the target signal filter aliasing signal received by frequency conversion receiving element;
A/D collecting unit, for receiving the signal of anti-aliasing filter unit, and becomes analog signal into digital signal;
Digital demodulation unit, for receiving the digital signal that A/D collecting unit is sent into, carrying out demodulation by the type of digital modulation formats, recovering code stream;
Channel decoding unit, for carrying out decoding process to code stream, forms the information flow of various channel composition;
BCH analytic unit, for resolving according to information flow team BCH channel, parses loading various signalings on channels of the bch;
BCH increases signaling unit, sets up service message for generation of refusal;
Coding unit, for the channel of early decoding and new BCH channel are carried out recompile, is formed and will send new code stream;
Digital modulation unit, re-starts digital modulation for the digital modulation formats according to digital demodulation unit, forms new modulation signal;
Shaping filter unit, for receiving the signal of digital modulation unit, and eliminates symbol-interference;
D/A converter unit, for digital modulation signals is simulated, signal becomes analog I/Q signal again;
IQ modulating unit, for by the frequency of analog I/Q signal madulation to Base Transmitter;
Variable filter unit, for adjusting centre frequency and the filtering bandwidth of filter according to the frequency of Base Transmitter and the bandwidth requirement of base station transmit signals, filtering is spuious;
Gain control unit, for controlling the watt level transmitted;
Described BCH increase signaling unit is connected with generation refusal and sets up service message unit, and BCH increase signaling unit is set up service message for refusal generation refusal being set up the generation of service message unit and is attached to BCH channel.
Interference method following steps according to above-mentioned a kind of green mobile Communication Jamming device:
Step 1: first receive space base station signal and pass through frequency conversion, filtering, Decoding Analysis process, and the signaling that will obtain sends into BCH increase signaling unit;
Step 2: meanwhile, the generation refusal of this device is set up service message unit generation refusal and is set up service message;
Step 3: signaling step 1 obtained and step 2 produce new signaling and synthesize at BCH increase signaling unit, make BCH channel sets up service message with refusal;
Step 4: be transmitted in space after BCH channel sets up service message coded modulation with refusal.
Comprise the steps: in described step 1
(1) first receiving space base station signal is converted to low frequency by signal from radio frequency by frequency conversion receiving element, in order to be conducive to follow-up A/D collecting unit collection signal;
(2) after channel is reduced to low frequency signal, because frequency conversion can introduce aliasing signal, then by anti-aliasing filter unit filtering aliasing signal, useful signal is retained;
(3) A/D collecting unit gathers low frequency useful signal, and signal from analog signal becomes digital signal;
(4) digital signal carries out demodulation by digital demodulation unit by the type of digital modulation formats, recovers code stream;
(5) channel decoding unit carries out decoding process to code stream, forms the information flow of various channel composition;
(6) now BCH analytic unit is resolved according to information flow team BCH channel, parses loading various signalings on channels of the bch;
Comprise the steps: in described step 4
A, BCH channel sets up service message with refusal, then by coding unit, the channel of early decoding and new BCH channel is carried out recompile, formed and will send new code stream;
B, digital modulation unit re-start digital modulation according to the digital modulation formats of digital demodulation unit, form new modulation signal;
C, by shaping filter unit, new modulation signal is formed filtering process again, eliminate symbol-interference;
D, D/A converter unit is simulated by digital modulation signals, and signal becomes analog I/Q signal again;
E, IQ modulating unit by analog I/Q signal madulation in the frequency of Base Transmitter;
F, variable filter unit adjust centre frequency and the filtering bandwidth of filter according to the bandwidth requirement of the frequency of Base Transmitter and base station transmit signals, and filtering is spuious, prevents other unwanted signals;
G, gain control unit control the watt level transmitted, and control the radiation scope of this device, finally, signal is transmitted into space.
The Advantageous Effects adopting as above technical scheme to obtain is:
The present invention can the base station signal of analytic space, can change the content of spacing wave; A kind of mobile communication base station signal can be produced; The interfere with communications of various secret meeting can be applied to, prevent from divulging a secret; Also can be used for the interfere with communications of various examination occasion, prevent from cheating at one's exam.
The present invention utilizes existing base station signal to solve to utilize high-power noise signal to suppress in the past and brings spacing wave pollution problem, and the gain controllable characteristic utilizing this device to output signal, controlling the coverage of this countermeasure set, maintaining secrecy and frequency pollution problem for being badly in need of in the industry solving at present.
Accompanying drawing explanation
Fig. 1 is green mobile Communication Jamming apparatus structure block diagram.
Fig. 2 is terminal refusal call signalling flow figure.
Embodiment
1 to 2 pair of the specific embodiment of the present invention is described further by reference to the accompanying drawings:
Setting up to the BCH channel of existing base station increasing refusal the device that traffic signaling realizes a kind of green mobile Communication Jamming, comprising frequency conversion receiving element, anti-aliasing filter unit, A/D collecting unit, digital demodulation unit, channel decoding unit, BCH analytic unit, refusal sets up service message unit, BCH increases signaling unit, coding unit, digital modulation unit, shaping filter unit, D/A converter unit, IQ modulating unit, variable filter unit, gain control unit in generation.
This device receives space base station signal by above-mentioned frequency conversion receiving element, anti-aliasing filter unit, A/D collecting unit, digital demodulation unit, channel decoding unit, the BCH channel of base station is resolved by BCH analytic unit, then this device is set up service message unit generation refusal by generation refusal again and is set up service message, increase signaling unit by BCH again to set up the refusal that service message unit produces and set up service message by producing refusal and be attached on BCH channel, passing through coding unit, digital modulation unit, shaping filter unit, D/A converter unit, IQ modulating unit, variable filter unit, the base station signal that BCH sets up service message with refusal sends by gain control unit.
BCH signal makes mobile phone find network, and makes mobile phone be synchronized with network, and the intensity of BCH signal tell mobile phone which be the GSM network nearest apart from it; Mobile phone is every BCH power reporting neighbor cell for 30 seconds almost, so that determine whether switch by base station.BCH channel delivery control information, call information, network identity information, the call information of all mobile phones is all on BCH.
The signal that apparatus of the present invention are launched is equivalent to a road reflection of base station signal, therefore in environment, signal does not also change, and do not converse at mobile phone, during the business such as short message, mobile phone can not produce any change, but when mobile phone needs to set up call, during the business such as short message, handset emissions sets up business request information, when usual base station receives this message, feed back to mobile phone according to business actual conditions whether to agree to set up this business, but apparatus of the present invention unanimously send refusal in simulation current base station and set up service message, mobile phone thinks that current to set up professional qualification immature by mistake, therefore, service fail is set up in mobile phone display, thus reach shield effectiveness.Apparatus of the present invention have very important effect in all kinds of secret meeting and examination, and do not produce new pollutant sources to environment.
The present invention can specifically carry out as follows:
(1) first apparatus of the present invention receive space base station signal and are converted to low frequency by signal from radio frequency by frequency conversion receiving element, in order to be conducive to follow-up A/D collecting unit collection signal;
(2) after channel is reduced to low frequency signal, because frequency conversion can introduce aliasing signal, then by anti-aliasing filter unit filtering aliasing signal, useful signal is retained;
(3) A/D collecting unit gathers low frequency useful signal, and signal from analog signal becomes digital signal;
(4) digital signal carries out demodulation by digital demodulation unit by the type of digital modulation formats, recovers code stream;
(5) channel decoding unit carries out decoding process to code stream, forms the information flow of various channel composition;
(6) now BCH analytic unit is resolved according to information flow team BCH channel, parses loading various signalings on channels of the bch;
(7) simultaneously, the generation refusal of this device is set up service message unit generation refusal and is set up service message;
(8) BCH analytic unit resolve signaling and produce refusal set up service message unit produce new signaling BCH increase signaling unit synthesize, make BCH channel sets up service message with refusal;
(9) by coding unit, the channel of early decoding and new BCH channel are carried out recompile again, formed and will send new code stream;
(10) digital modulation unit re-starts digital modulation according to the digital modulation formats of digital demodulation unit, forms new modulation signal;
(11) by shaping filter unit, new modulation signal is formed filtering process again, eliminate symbol-interference;
(12) D/A converter unit is simulated by digital modulation signals, and signal becomes analog I/Q signal again;
(13) IQ modulating unit by analog I/Q signal madulation in the frequency of Base Transmitter;
(14) variable filter unit adjusts centre frequency and the filtering bandwidth of filter according to the bandwidth requirement of the frequency of Base Transmitter and base station transmit signals, and filtering is spuious, prevents other unwanted signals;
(15) gain control unit controls the watt level that transmits, and control the radiation scope of this device, finally, signal is transmitted into space.
As shown in Figure 2, terminal refusal call signalling flow is as follows:
1. base station is by paging Class1 message page Idle state terminal.
2. terminal is after obtaining down-going synchronous, sends uplink synchronizing signals to base station, after receiving the FPACH information responded base station, RACH channel sends RRC connection request message to base station, initiates RRC connection establishment process.
3. base station sends RRC connection establishment message to terminal on FACH channel.
4. terminal sends RRC connection setup complete message to base station on DCCH, and RRC connection establishment completes.
5. terminal sends initial direct-sending (page response) message to base station on DCCH.
6. base station sends descending (authentication request) message that direct transfers to terminal, requires to carry out authentication to terminal.
7. terminal sends up (Authentication Response) message that direct transfers to base station, and informing network lateral terminal requires to complete authentication according to authentication.
8. base station sends Security Mode Command message to terminal, requires that terminal carries out security mode control, starts/restart ciphering process.
9., after the cipher mode that terminal successful Application is new, up DCCH sends safe mode and completes message to base station, both sides complete security mode control.
10. base station sends descending (foundation) message that direct transfers and to terminal, contains session identification, bearing capacity, callee's number, the information such as called party subaddress.
11. terminals receive and process descending (foundation) message that direct transfers, and generate up (confirming call) message that direct transfers and send to base station, represent that the full detail setting up calling needs obtains.
12. base stations send radio bearer to terminal and set up message.
13. terminals send radio bearer according to new transformat and have set up message to base station.
14. terminals generate up (ring) message that direct transfers and send to base station after completing radio bearer foundation, trigger ring.
15. terminals generate up (refusal) message that direct transfers, and carry TI and release cause in message, and request network sweep connects, and sends to base station.
16. base stations receive and process up (refusal) message that direct transfers, and generate release message and send to terminal.
17. terminals receive and process RELEASE message, generate Release complete and send to base station.
The present invention, according to the requirement of current secret, considers the new demand of environment electromagnetics signal contamination on the healthy impact of people, but does not have good solution at present, and therefore we design a kind of green mobile Communication Jamming method and apparatus.This device utilizes the BCH channel of existing space base station signal to increase new signaling method and produces a kind of green mobile communication interference signals, therefore, apparatus of the present invention feature does not change the content that spacing wave changes signal simultaneously, progressively can excavate, can be applied to multiple occasion.
Certainly; more than illustrate and be only preferred embodiment of the present invention; the present invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the guidance of this specification; made all equivalently to substitute, obvious variant, within the essential scope all dropping on this specification, protection of the present invention ought to be subject to.
Claims (4)
1. a green mobile Communication Jamming device, is characterized in that, comprises the following structure be communicated with successively:
Frequency conversion receiving element, for receiving space base station signal;
Anti-aliasing filter unit, for the target signal filter aliasing signal received by frequency conversion receiving element;
A/D collecting unit, for receiving the signal of anti-aliasing filter unit, and becomes analog signal into digital signal;
Digital demodulation unit, for receiving the digital signal that A/D collecting unit is sent into, carrying out demodulation by the type of digital modulation formats, recovering code stream;
Channel decoding unit, for carrying out decoding process to code stream, forms the information flow of various channel composition;
BCH analytic unit, for resolving according to information flow team BCH channel, parses loading various signalings on channels of the bch;
BCH increases signaling unit, sets up service message for generation of refusal;
Coding unit, for the channel of early decoding and new BCH channel are carried out recompile, is formed and will send new code stream;
Digital modulation unit, re-starts digital modulation for the digital modulation formats according to digital demodulation unit, forms new modulation signal;
Shaping filter unit, for receiving the signal of digital modulation unit, and eliminates symbol-interference;
D/A converter unit, for digital modulation signals is simulated, signal becomes analog I/Q signal again;
IQ modulating unit, for by the frequency of analog I/Q signal madulation to Base Transmitter;
Variable filter unit, for adjusting centre frequency and the filtering bandwidth of filter according to the frequency of Base Transmitter and the bandwidth requirement of base station transmit signals, filtering is spuious;
Gain control unit, for controlling the watt level transmitted;
Described BCH increase signaling unit is connected with generation refusal and sets up service message unit, and BCH increase signaling unit is set up service message for refusal generation refusal being set up the generation of service message unit and is attached to BCH channel.
2. the interference method of a kind of green mobile Communication Jamming device according to claim 1, it is characterized in that, described interference method comprises the steps:
Step 1: first receive space base station signal and pass through frequency conversion, filtering, Decoding Analysis process, and the signaling that will obtain sends into BCH increase signaling unit;
Step 2: meanwhile, the generation refusal of this device is set up service message unit generation refusal and is set up service message;
Step 3: signaling step 1 obtained and step 2 produce new signaling and synthesize at BCH increase signaling unit, make BCH channel sets up service message with refusal;
Step 4: be transmitted in space after BCH channel sets up service message coded modulation with refusal.
3. the interference method of green mobile Communication Jamming device according to claim 2, is characterized in that, comprise the steps: in described step 1
(1) first receiving space base station signal is converted to low frequency by signal from radio frequency by frequency conversion receiving element, in order to be conducive to follow-up A/D collecting unit collection signal;
(2) after channel is reduced to low frequency signal, because frequency conversion can introduce aliasing signal, then by anti-aliasing filter unit filtering aliasing signal, useful signal is retained;
(3) A/D collecting unit gathers low frequency useful signal, and signal from analog signal becomes digital signal;
(4) digital signal carries out demodulation by digital demodulation unit by the type of digital modulation formats, recovers code stream;
(5) channel decoding unit carries out decoding process to code stream, forms the information flow of various channel composition;
(6) now BCH analytic unit is resolved according to information flow team BCH channel, parses loading various signalings on channels of the bch.
4. the interference method of green mobile Communication Jamming device according to claim 3, is characterized in that, comprise the steps: in described step 4
A, BCH channel sets up service message with refusal, then by coding unit, the channel of early decoding and new BCH channel is carried out recompile, formed and will send new code stream;
B, digital modulation unit re-start digital modulation according to the digital modulation formats of digital demodulation unit, form new modulation signal;
C, by shaping filter unit, new modulation signal is formed filtering process again, eliminate symbol-interference;
D, D/A converter unit is simulated by digital modulation signals, and signal becomes analog I/Q signal again;
E, IQ modulating unit by analog I/Q signal madulation in the frequency of Base Transmitter;
F, variable filter unit adjust centre frequency and the filtering bandwidth of filter according to the bandwidth requirement of the frequency of Base Transmitter and base station transmit signals, and filtering is spuious, prevents other unwanted signals;
G, gain control unit control the watt level transmitted, and control the radiation scope of this device, finally, signal is transmitted into space.
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| CN201510969771.6A CN105553490B (en) | 2015-12-17 | 2015-12-17 | A kind of green mobile Communication Jamming device and its interference method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106612503A (en) * | 2016-12-27 | 2017-05-03 | 国网能源研究院 | Safety communication method and device |
| CN111200478A (en) * | 2018-11-19 | 2020-05-26 | 晨星半导体股份有限公司 | Demodulation device and demodulation method for digital satellite broadcast signals |
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| CN102104437A (en) * | 2011-01-11 | 2011-06-22 | 北京理工大学 | Radio system for preventing cheating on exams |
| CN102307052A (en) * | 2011-09-23 | 2012-01-04 | 长春卓尔信息安全产业股份有限公司 | Intelligent fixed-frequency interferometer |
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| CN105553490B (en) | 2017-12-01 |
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