CN103634060A - Real-time radio collaborative monitoring, detecting and locating method - Google Patents
Real-time radio collaborative monitoring, detecting and locating method Download PDFInfo
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Abstract
The invention discloses a real-time radio collaborative monitoring, detecting and locating method. The method is characterized in that a monitoring network consisting of a plurality of sensing nodes and a converging node is arranged in a monitoring area; each sensing node module A works in different sub-sequence bands, and a module B waits to be called; if an abnormal radio signal is detected by a sensing node i, each module B is called by the converging node to work in a sub-band i to measure a radio signal in real time, and if an abnormal signal is detected, an I/Q component is transmitted to the converging node to be processed so as to locate and display the abnormal signal. The method is applicable to monitoring, detecting and locating an abnormal radio transmitted signal at a local area such as an examination room and an important conference, and the weakness of the radio monitoring method which is mainly used on the large-sized monitoring station can be effectively solved; through the collaborative processing of the sensing nodes and the converging node, the problem that data processing volume of the converging node is increased because of the increased number of the sensing nodes can be solved, and the application prospect is good.
Description
Technical field
The invention belongs to areas of information technology, relate to many sensing nodes synergic monitoring in radio monitoring, detect and location.
Background technology
Radio-frequency spectrum is the important carrier of information wireless transmission, to realize wireless interconnected the only resource, it is a kind of important national strategy resource, pass through radio monitoring, carry out radio spectrum management, safeguarding aerial electric wave order, guarantee radio safety, is the key factor that concerns economic development, social stability and national security.At present, each province, the whole nation has set up take fixed monitoring station as main radio monitoring net, mainly that owing to being subject to the impact of multipath and shadow effect, the detection of the abnormal radio signal of fixed monitoring station localized region often seems unable to do what one wishes for the normal design of signaling on a large scale.When some important examination halls and meeting-place being carried out to the work of radio safety guarantee, the method that radio monitoring department takes is conventionally to send monitoring car, by the mode of manually searching, investigate abnormal radio signal emission source, monitoring amount is large, efficiency is difficult to improve, and adopts the mode of manually searching to be difficult to detect random unexpected abnormality radio signal.
Simultaneously, development along with wireless communication technology, Wireless Telecom Equipment is developed to microminiaturization, digitlization and intelligent direction gradually by arrowband, high-power transmitting at present, and various low-power wireless transmitters increase the supervision to radio and brought certain difficulty; In addition, under the urban construction paces background of progressively accelerating, high building stands in great numbers, and electromagnetic environment is increasingly sophisticated, and traditional radio monitoring method is faced with many severe challenges, for example, because high-rise and high-rise building increase, some fixed monitoring stations present position is no longer the peak of monitored area, and monitoring range dwindles, blind area increases, and badly influences radio guard to the direction finding of signal and location.
Developing the radio monitoring that becomes more meticulous is the effective way that overcomes above-mentioned difficulties.Yet, still there are some problems in the monitoring that becomes more meticulous, for example, the monitoring inevitable requirement that becomes more meticulous is arranged a large amount of sensing nodes in monitored area, this will cause network data amount to increase, if all Monitoring Data are all transferred to convergence center, process, and will strengthen convergence center data process load; Conventionally, for traditional radio guard, monitoring and direction-finding positioning function are independently, develop become more meticulous radio monitoring inevitable requirement carry out in real time monitoring, detection and the location of signal; In addition, the restriction due to monitoring equipment reception bandwidth, adopts traditional monitoring method, and the frequency spectrum data within the scope of a certain band frequency obtaining through Multiple-Scan is no longer real time spectrum, and develop the radio monitoring requirement that becomes more meticulous, frequency spectrum is processed in real time.
Therefore, the development monitoring that becomes more meticulous is badly in need of a kind ofly can collecting real-time radio pyroelectric monitor, is detected and orientate as one, the monitoring method that sensing node and aggregation node can cooperative schedulings.
Summary of the invention
The object of this invention is to provide a kind of real-time radio electricity synergic monitoring, detection and localization method, efficiently solve the subject matter that current radio monitoring technology exists.The method collection radio monitoring and abnormal signal detect and orientate one as, can carry out Real-Time Monitoring and detection to radio signal I/Q component and radio-frequency spectrum, simultaneously, by aggregation node cooperative scheduling sensing node, realize the direction finding of abnormal radio transmission and location, for the local key area radio monitoring that becomes more meticulous provides a kind of technical scheme.
A kind of real-time radio electricity of the present invention synergic monitoring, detection and localization method, comprise the following steps:
(1) in monitored area, arrange a plurality of sensing nodes and an aggregation node.
(2) aggregation node is divided into N subband by monitoring frequency scope, distributes to the A module of each sensing node and carry out noise spectrum monitoring in corresponding subband, and B module is waited for scheduling.
(3) sensing node judges in the signal that A module receives whether have abnormal radio signal by energy measuring, if without abnormal, sensing node is stored real-time i/q signal and time to database table 1; If sensing node i detects abnormal radio signal, sensing node, in storage real-time i/q signal and the time in database table 1, constantly deposits the start-stop of abnormal signal generation time section in database table 2, and sends collaborative request to aggregation node.
(4) aggregation node is accepted the collaborative request that sensing node i sends, and with broadcast mode, notifies each sensing node B module to carry out noise spectrum monitoring to subband i.
(5) if detecting subband i, certain sensing node B module there is abnormal radio transmission, this sensor node is sent to aggregation node by signal digital I/Q component and corresponding time tag, if abnormal signal do not detected, B module turns back to wait dispatch state.
(6) aggregation node positions according to digital I/Q component and corresponding time tag.
(7) aggregation node shows abnormal signal transmitting site or direction on electronic chart, and abnormal radio signal source position or orientation demonstration information are licensed to mobile terminal carries out abnormal signal investigation.
(8), if investigation not yet finishes, aggregation node continues the collaborative request of response sensing node i, dynamically shows abnormal signal emission source present position; If investigation finishes aggregation node and finishes this secondary response, get back to wait state or respond next collaborative request.
(9) when monitoring finishes, each sensing node passes to aggregation node by the real-time I/Q component measuring at each subband, and aggregation node, by the measurement result stack of same time section, obtains whole frequency range real-time radio signal of telecommunication I/Q component and real time spectrum.
Described sensor node consists of two software radio modules A and the B with GPS function, its function is that the radiofrequency signal receiving is moved to base band, and obtain digital I/Q component by processing, each sensing node and at least two sensing nodes are around looked logical, adopt the methods such as energy measuring and characteristic value detection to detect abnormal radio signal.
Described each sensing node A module receives signal I/Q component by measurement and obtains real time spectrum, and detects and store, and the real time spectrum of each sensing node is at the real time spectrum in radio monitoring frequency range that is superposed to of same time section.
The B module of described each sensing node is worked in coordination with and scheduling by aggregation node, if sensing node i sends collaborative request to aggregation node, aggregation node response request, the B module of dispatching all sensing nodes is operated in subband i, when the B of arbitrary sensing node module detects while having abnormal radio transmission in subband i, the digital I/Q component measuring is sent to aggregation node.
Described sensing node sends collaborative request to aggregation node and has certain priority, if plural sensing node sends collaborative request to aggregation node simultaneously, aggregation node responds according to the height of priority.
The digital I/Q component that described aggregation node sends according to sensing node obtains the modulation system that extremely transmits, transmitting power and frequency.
Described location comprises four kinds of situations: if aggregation node receives that more than 3 or 3 sensing nodes transmit I/Q component, aggregation node obtains real time spectrum according to I/Q component, adopts received signal strength localization method to locate in real time abnormal radio signal; If only have two sensing nodes to send I/Q component signal, aggregation node carries out direction finding according to two groups of I/Q components to emission source; If only receive the I/Q component that sensing node i sends, show to only have sensing node i abnormal radio signal to be detected, now aggregation node is locked in node i region of living in by abnormal signal source position; If do not receive i/q signal, aggregation node is judged as unexpected abnormality radio signal, and source position is locked in to sensing node i region of living in.
Accompanying drawing explanation
Fig. 1 is design flow diagram;
Fig. 2 is schematic network structure;
When Fig. 3 is the abnormal radio signal generation of nothing, four real time spectrums that sensing node A module measures;
Fig. 4 is the display floater of aggregation node, as schemed: sensing node 1, aggregation node 2, transmission link 3, abnormal signal emission source 4, mobile terminal 5, wireless network 6.
Fig. 1 illustrates the present invention, a kind of real-time radio electricity synergic monitoring, detection and localization method design flow diagram.The present embodiment adopts four sensing nodes and an aggregation node to carry out in the region of 60m * 60m, monitoring band limits is 410-490MHz, each sensing node adopts two software radio equipment USPR N210 and a small-sized industrial computer to form, USRP devices allocation different IP addresses, be defined as respectively A module and B module, intermediate-frequency bandwidth is 20M; Aggregation node is high performance mini industrial computer, between aggregation node and sensing node, by cable network, connects, and adopts DataSocket technology to realize the transmission of data.
Fig. 2 is the present embodiment schematic network structure.
As shown in Figure 1, flow process starts from step S1.
At step S2, aggregation node is divided into four subbands by whole frequency range, be respectively 410-430MHz, 430-450MHz, 450-470MHz, 470-490MHz, distributes to four sensing node A modules, and start noise spectrum monitoring event, the radio-frequency spectrum in each sensing node A module Real-Time Monitoring frequency band.
At step S3, each sensing node judges by energy measuring whether A module receives abnormal radio signal, and the detection statistic of energy measuring is:
, wherein,
for signal length,
for the radio signal measuring; While launching without abnormal signal,
,
stack for ambient noise signal and authorization user signal; While having abnormal signal transmitting,
,
for abnormal radio signal to be detected; Often carry out Real-Time Monitoring one time, sensing node is by the signal energy measuring and decision threshold
compare, when
time, indicate abnormal radio signal transmitting, when
time, represent not have abnormal radio signal transmitting.If there is no the transmitting of abnormal radio signal, sensing node is stored real-time I/Q component and time to database table 1; If sensing node i detects abnormal radio signal,, when real-time I/Q component and time are stored to database table 1, sensing node deposits the start-stop of abnormal signal generation time section in database table 2 constantly, and sends collaborative request to aggregation node.
At step S4, aggregation node is notified each sensing node B module Real-Time Monitoring subband i with broadcast mode.
At step S5, sensing node detects the real-time radio signal of telecommunication that B module measures, and has judged whether that abnormal signal produces, if abnormal signal do not detected, corresponding B module is returned to wait dispatch state; If abnormal radio transmission detected, the signal I/Q component that sensing node measures B module sends to aggregation node.
At step S6, the I/Q component signal that aggregation node is sent according to sensing node positions, minute following four kinds of situations:
(1) if aggregation node receives that more than 3 or 3 sensing nodes transmit I/Q component, aggregation node obtains real time spectrum according to I/Q component, start received signal strength finder, first according to received signal strength, by the distance of radio waves propagation model prediction emission source and monitoring point, then adopt polygon rule to position abnormal radio signal according to distance.
(2) if only have two sensing nodes to send I/Q component signal, aggregation node carries out direction finding according to two groups of i/q signals to emission source;
(3) if only receive the I/Q component signal that sensing node i sends, show to only have sensing node i abnormal frequency spectrum to be detected, now, aggregation node is locked in node i region of living in by abnormal signal source position;
(4) if do not receive I/Q component signal, aggregation node is judged as unexpected abnormality radio signal, and source position is locked in to sensing node i region of living in.
At step S7, aggregation node shows abnormal signal source position or direction on map, and starts remote desktop, abnormal radio signal source position or azimuth information is licensed to mobile terminal and carry out abnormal signal investigation.
At step S8, if investigation not yet finishes, aggregation node continues the collaborative request of response sensing node i, dynamically shows abnormal radio signal emission source present position; If investigation finishes aggregation node and finishes this secondary response, get back to wait state or respond next collaborative request.
At step S9, if monitor, not yet finish, each sensing node modules A test constantly live signal; If monitoring finishes, each sensing node passes to aggregation node by the real-time I/Q component measuring at each subband, and aggregation node, by the measurement result stack of same time section, obtains whole frequency range real-time radio signal of telecommunication I/Q component and real time spectrum.
Embodiment carries out at the field of 60m * 60m, and four sensing nodes are arranged in four jiaos of fields, at a distance of 60 meters, by netting twine, is connected to aggregation node; Sensing node 1-4 measures respectively 410-430MHz, 430-450MHz, 450-470MHz, the signal within the scope of 470-490MHz; Adopt an intercom that is operated in 463.5 MHz to transmit to simulate abnormal radio signal transmitting; Control on Communication between sensing node and aggregation node, and method design cycle adopts software LabVIEW to realize.Figure 3 shows that while there is no abnormal jamming signal transmitting, four real time spectrums that sensing node A module measures, these real time spectrums are the real time spectrum within the scope of whole band frequency in the stack of corresponding time period.When we adopt wireless microphone to transmit, sensing node 3 detects abnormal radio signal transmitting, and sending collaborative request to aggregation node, aggregation node is accepted the collaborative request that sensing node 3 sends and is notified each sensing node B module Real-Time Monitoring subband 3 (450-470MHz) with broadcast mode.Fig. 4 is the display floater of aggregation node, as seen from the figure, the B module of sensing node 1-4 detects abnormal radio transmission signal, and I/Q component is transferred to aggregation node, now, aggregation node obtains radio-frequency spectrum according to I/Q component, and starts received signal strength finder, and abnormal radio emitting source is positioned and shown.
The above embodiment has only expressed one embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with claims.
Claims (7)
1. real-time radio electricity synergic monitoring, detection and a localization method, is characterized in that, comprises the following steps:
(1) in monitored area, arrange a plurality of sensing nodes and an aggregation node;
?(2) aggregation node is divided into N subband by monitoring frequency scope, distributes to the A module of each sensing node and carry out noise spectrum monitoring in corresponding subband, and B module is waited for scheduling;
?(3) in the signal that sensing node adopts energy measuring judge that A module receives, whether have abnormal radio signal, if without extremely, sensing node is stored real-time I/Q component and time to database table 1; If sensing node i detects abnormal radio signal, sensing node, in storage real-time I/Q component and the time in database table 1, constantly deposits the start-stop of abnormal signal generation time section in database table 2, and sends collaborative request to aggregation node;
?(4) aggregation node is accepted the request of sensing node i, with broadcast mode, notifies each sensing node B module Real-Time Monitoring subband i;
?(5) if detecting subband i, certain sensing node B module there is abnormal radio transmission, this sensor node is sent to aggregation node by signal digital I/Q component and corresponding time tag, if abnormal signal do not detected, B module turns back to wait dispatch state;
?(6) aggregation node positions according to digital I/Q component and corresponding time tag;
?(7) aggregation node shows abnormal signal source position or direction on electronic chart, and abnormal radio signal source position or azimuth information are licensed to mobile terminal carries out abnormal signal investigation;
?(8), if investigation not yet finishes, aggregation node continues the collaborative request of response sensing node i, dynamically shows abnormal signal emission source present position; If investigation finishes aggregation node and finishes this secondary response, get back to wait state or respond next collaborative request;
?(9) when monitoring finishes, each sensing node passes to aggregation node by the real-time I/Q component measuring at each subband, and aggregation node, by the measurement result stack of same time section, obtains whole frequency range real-time radio signal of telecommunication I/Q component and real time spectrum.
2. real-time radio according to claim 1 electricity synergic monitoring, detection and localization method, it is characterized in that, described sensor node consists of two software radio modules A, B and the small-sized industrial computer with GPS function, its function is that the radiofrequency signal receiving is moved to base band, and obtain digital I/Q component by processing, each sensing node is at least looked logical with two sensing nodes around, adopts the methods such as energy measuring and characteristic value detection to detect abnormal radio signal.
3. real-time radio electricity synergic monitoring according to claim 1, detection and localization method, is characterized in that, described each sensing node A module receives signal I/Q component by measurement and obtains real time spectrum, and detects and store.
4. real-time radio according to claim 1 electricity synergic monitoring, detection and localization method, it is characterized in that, the B module of described each sensing node is worked in coordination with and scheduling by aggregation node, if sensing node i sends collaborative request to aggregation node, aggregation node response request, dispatch all sensing node B modules and be operated in subband i, when the B of arbitrary sensing node module detects while having abnormal radio transmission in subband i, the digital I/Q component measuring is sent to aggregation node.
5. real-time radio according to claim 1 electricity synergic monitoring, detection and localization method, it is characterized in that, described sensing node sends collaborative request to aggregation node and has certain priority, if plural sensing node sends collaborative request to aggregation node simultaneously, aggregation node responds according to the height of priority.
6. real-time radio electricity synergic monitoring according to claim 1, detection and localization method, is characterized in that, the digital I/Q component that described aggregation node sends according to sensing node obtains the modulation system that extremely transmits, transmitting power and frequency.
7. real-time radio according to claim 1 electricity synergic monitoring, detection and localization method, it is characterized in that, described location comprises following four kinds of situations: if aggregation node is received 3 or 3 I/Q components that above sensing node transmits, aggregation node obtains real time spectrum according to I/Q component, adopts received signal strength localization method to locate in real time abnormal radio signal; If only have two sensing nodes to send i/q signal, aggregation node carries out direction finding according to two groups of I/Q components to emission source; If only receive the I/Q component that sensing node i sends, show to only have sensing node i abnormal radio signal to be detected, now aggregation node is locked in node i region of living in by abnormal signal source position; If do not receive i/q signal, aggregation node is judged as unexpected abnormality radio signal, and source position is locked in to sensing node i region of living in.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038301A (en) * | 2014-06-30 | 2014-09-10 | 信亚美科（南京）信息技术有限公司 | Distributed intelligent radio monitoring system |
| CN105812075A (en) * | 2016-05-04 | 2016-07-27 | 中国人民解放军理工大学 | Dictograph discovering, locating and alarming system and method |
| CN106353603A (en) * | 2016-08-31 | 2017-01-25 | 成都九华圆通科技发展有限公司 | Intelligent cloud monitoring method for radio |
| CN109451529A (en) * | 2019-01-02 | 2019-03-08 | 成都华日通讯技术有限公司 | A kind of miniature spectral sensor net system and its synergistic data processing method |
| CN109752600A (en) * | 2019-01-14 | 2019-05-14 | 电子科技大学 | Abnormal electromagnetic signal analysis system and method based on software defined radio |
| CN110249653A (en) * | 2017-03-01 | 2019-09-17 | 华为技术有限公司 | A kind of condition detection method and terminal of signal transmitting equipment |
| CN111416677A (en) * | 2019-01-06 | 2020-07-14 | 海南大学 | Distributed electromagnetic spectrum monitoring embedded system |
| CN116318457A (en) * | 2023-05-17 | 2023-06-23 | 成都中星世通电子科技有限公司 | Radio signal monitoring method and system |
| CN117580081A (en) * | 2024-01-15 | 2024-02-20 | 成都大公博创信息技术有限公司 | Major activity guarantee command control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2492128A (en) * | 2011-06-22 | 2012-12-26 | Nec Corp | Cooperative sensing in a cognitive radio communications system |
| CN102932912A (en) * | 2012-10-08 | 2013-02-13 | 中国电子科技集团公司第五十四研究所 | WSN (wireless sensor network) based electromagnetic spectrum signal positioning method |
| US20130045750A1 (en) * | 2011-08-19 | 2013-02-21 | Snu R&Db Foundation | Wireless localization method based on an efficient multilateration algorithm over a wireless sensor network and a recording medium in which a program for the method is recorded |
| CN103152114A (en) * | 2013-02-22 | 2013-06-12 | 云南大学 | Mobile coordinated radio monitoring method |
-
2013
- 2013-11-14 CN CN201310564753.0A patent/CN103634060A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2492128A (en) * | 2011-06-22 | 2012-12-26 | Nec Corp | Cooperative sensing in a cognitive radio communications system |
| US20130045750A1 (en) * | 2011-08-19 | 2013-02-21 | Snu R&Db Foundation | Wireless localization method based on an efficient multilateration algorithm over a wireless sensor network and a recording medium in which a program for the method is recorded |
| CN102932912A (en) * | 2012-10-08 | 2013-02-13 | 中国电子科技集团公司第五十四研究所 | WSN (wireless sensor network) based electromagnetic spectrum signal positioning method |
| CN103152114A (en) * | 2013-02-22 | 2013-06-12 | 云南大学 | Mobile coordinated radio monitoring method |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104038301A (en) * | 2014-06-30 | 2014-09-10 | 信亚美科（南京）信息技术有限公司 | Distributed intelligent radio monitoring system |
| CN105812075A (en) * | 2016-05-04 | 2016-07-27 | 中国人民解放军理工大学 | Dictograph discovering, locating and alarming system and method |
| CN106353603A (en) * | 2016-08-31 | 2017-01-25 | 成都九华圆通科技发展有限公司 | Intelligent cloud monitoring method for radio |
| CN110249653B (en) * | 2017-03-01 | 2021-07-16 | 华为技术有限公司 | State detection method of signal transmitting equipment and terminal |
| CN110249653A (en) * | 2017-03-01 | 2019-09-17 | 华为技术有限公司 | A kind of condition detection method and terminal of signal transmitting equipment |
| CN109451529A (en) * | 2019-01-02 | 2019-03-08 | 成都华日通讯技术有限公司 | A kind of miniature spectral sensor net system and its synergistic data processing method |
| CN111416677A (en) * | 2019-01-06 | 2020-07-14 | 海南大学 | Distributed electromagnetic spectrum monitoring embedded system |
| CN109752600B (en) * | 2019-01-14 | 2021-06-08 | 电子科技大学 | Abnormal electromagnetic signal analysis system and method based on software defined radio technology |
| CN109752600A (en) * | 2019-01-14 | 2019-05-14 | 电子科技大学 | Abnormal electromagnetic signal analysis system and method based on software defined radio |
| CN116318457A (en) * | 2023-05-17 | 2023-06-23 | 成都中星世通电子科技有限公司 | Radio signal monitoring method and system |
| CN116318457B (en) * | 2023-05-17 | 2023-08-01 | 成都中星世通电子科技有限公司 | Radio signal monitoring method and system |
| CN117580081A (en) * | 2024-01-15 | 2024-02-20 | 成都大公博创信息技术有限公司 | Major activity guarantee command control system |
| CN117580081B (en) * | 2024-01-15 | 2024-03-19 | 成都大公博创信息技术有限公司 | Major activity guarantee command control system |
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Application publication date: 20140312 |