CN106453107A - Motion detection router based on wireless network signal physical layer disturbance - Google Patents
Motion detection router based on wireless network signal physical layer disturbance Download PDFInfo
- Publication number
- CN106453107A CN106453107A CN201610951393.3A CN201610951393A CN106453107A CN 106453107 A CN106453107 A CN 106453107A CN 201610951393 A CN201610951393 A CN 201610951393A CN 106453107 A CN106453107 A CN 106453107A
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- China
- Prior art keywords
- wireless network
- motion detection
- equipment
- csi
- network card
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/60—Router architectures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
Abstract
The invention relates to equipment for realizing motion detection by analysis of wireless network signal physical layer disturbance based on a Wi-Fi (Wireless Fidelity) technology. The equipment belongs to wireless communication equipment, and particularly relates to a motion detection router based on wireless network signal physical layer disturbance. A relatively-skillful method is used, so that arrangement of the equipment in households and markets is realized by an existing household WIFI network and even by direct use of a WIFI router in a household under the condition of not increasing the cost. When the equipment is used together with a conventional method, the security of the household can be ensured more intelligently and fully. The equipment is low in cost, and can be transformed from certain existing routers. The equipment has high invisibility, is consistent with a wireless router in functions and appearance, has a large coverage area and high sensitivity, has no influence on a detected object, and is not easy to be detected.
Description
Technical field
The present invention relates to a kind of pass through to obtain the CSI in transmitter and receiver communication process based on Wi-Fi technology
(Channel State Information channel condition information) is realizing a kind of equipment of motion detection.This equipment belongs to no
Line communication equipment, is related to a kind of processing method to channel condition information (CSI).
Background technology
Safety is always the constant pursuit of the mankind.With scientific and technological continuous development, Wi-Fi (one kind can by PC,
The technology that the terminals such as handheld device (as pad, mobile phone) wirelessly interconnect) technology be widely used in now daily
In life, the Household security system species being simultaneously based on WIFI is also increasingly various.The security protection solution of main flow is often based on
Multi-cam, multisensor, its effect very well, if but wanting to monitor its cost of large-area space and also can get over configuration difficulty
Come higher.The proprietary communications cable, is particularly developed, needs the software of continuous renewal, more allows maintenance, the cost of debugging increase
Plus.And not improving the installation cost of volume, its daily electricity using is also a no small spending.And typically family is to cost
The reason sensitive exactly present household safety-protection is difficult to real popularization.The present invention then employs one kind dexterously method relatively, leads to
Cross the WIFI network using existing family, be even directly used existing WIFI router in family as receiver, to pass through
Dynamic evaluation CSI come real-time perception home environment change (include windowing, personnel walk about, furniture mobile etc.).With tradition side
Method is used in conjunction can safety that is more intelligent, more fully ensureing family.
WIFI passes through OFDM (orthogonal frequency division multiplexi, one kind of multi-carrier modulation) technology, the communication that it is used
Channel is divided into mutually orthogonal 56 (802.11n, in the case of carrying a width of 20MHz, if carrying a width of 40MHz, is 114) individual subcarrier.
Because environment, the object of movement, for the difference of the abilities such as the absorption of the subcarrier of different frequency, reflection, reach each of receiver
The intensity of subcarrier also can be different.Diffraction, scattering, direct projection, multipath superposition etc. can make its signal strength differences again further simultaneously
Change is fairly obvious.So, even if very small action, or the minor alteration of environment, receiver all can be made to obtain
CSI data variation is very violent.Traditionally our RSSI accustomed to using to be representing the intensity of WIFI signal, but we ignore and are
RSSI be by CSI carry out simply plus and calculate come, its be only a kind of mode of simple estimating signal intensity.With CSI
Compare, RSSI, in the case that environment is not any change, can have the fluctuation of 5db in one minute, not only its granularity compared with CSI
Cross thick, and the fluctuation up and down of data be excessive, can only as a kind of method of just estimated signal strength slightly, or
Estimation to signal intensity under ideal conditionss.CSI used in the present invention, the data that it obtains is PHY layer (for physical layer) number
According to, contain a large amount of with regard to the information in transmitting procedure, and RSSI is located at MAC layer (positioned at data link layer lower floor), passes from PHY
The defeated process having already been through data to MAC, have lost substantial amounts of information (as the signal intensity of phase place, each subcarrier).So
If simple perceive environmental characteristic using RSSI, error excessive it is impossible to the change of real-time induced environment, complicated
Under environment (a large amount of barriers, multipath phenomenon is serious) or even cannot work completely.And use CSI then different, by some algorithms,
We can obtain its frequency domain, time domain situation it might even be possible to determine little yardstick multipath effect, determine signal reach prolong
When etc..So near transparent for us, we can clearly know the transmission situation in space for the wireless signal
In the transmission state in space, so, we have the radar of an omnidirectional to road signal as nearby.
Content of the invention
The problem that the present invention solves is that the CSI data how to be obtained by analyzing router realizes no sensor sensing,
Realize the real-time monitoring to motion, determine whether surrounding change, personnel and object mobile etc..
Technical scheme：
A kind of motion detection router based on wireless network signal physical layer disturbance, including wireless network card, data processing
Part and three parts of network interface；
Wireless network card includes two and supports to obtain the wireless network card of CSI, and first wireless network card serves as transmitter and send report
Literary composition, regularly sends data to second wireless network card, makes second wireless network card obtain the CSI under current environment；Second nothing
Gauze card serves as receiver, judges current environmental condition by the CSI data obtaining the generation in communication process；
Data processing section includes Flash chip, RAM and master control；Master control is the CPU that can run Openwrt, and master control obtains
Carry out Treatment Analysis after CSI data, and by each template in the set of contrast mould successively, it is determined whether environment changes
Or have motion；RAM not less than 32MB and the Flash chip not less than 4MB capacity are used for the storage of program and the temporary of data；
Multiple stage motion detection router component movement detects network, if having object of which movement, real-time tracking object in motion detection network
Motion path, triangle polyester fibre is carried out by multiple stage motion detection router in motion detection network and determines mobile object substantially
Position；Motion detection router passes through network interface connection to main frame, when it is in monitoring state, present circumstances are anti-in real time
Feed security protection personnel, and sends alarm when having motion to occur, and information is write by the node that the security protection personnel motion of prompting occurs
Enter daily record.
When in environment to be measured, there are objects moving, there is significant change in CSI, gathers (fingerprint by contrast mould
Set), find no the template of coupling in error allowed band, judge that in current environment space, there are objects moving or environment is sent out
Give birth to change, alarm signal has been sent by netting twine；Determine movement position by checking its numbering.
Beneficial effects of the present invention：
(1) reserve multiple antennal interfaces, be easily installed debugging.
(2) wireless aware, the external equipment of needs is few, easy for installation.
(3) sensing is sensitive, can sense small change.
(4) metal shell design, is capable of the normal work in the case of compared with strong electromagnetic.
(5) running voltage is low, and installation and debugging are safer.
(6) system environmentss are the Openwrt based on linux kernel, and transplantability is stronger.
(7) low cost, existing some routers can improvement cost equipment.
(8) cost of other purchase can as wireless network access point, be saved under non-supervised state.
Brief description
Fig. 1 is the motion detection route system structure chart of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing and technical scheme, further illustrate the specific embodiment of the present invention.
Embodiment
The chip of the data process subsystem of technical scheme selects the AR7130 of Atheros, processing speed
300MHz, wireless network card selects two AR9550, and RAM adopts 32MB 16bit DDR, and Flash chip adopts the string of 4MB capacity
Row Flash.Have an Ethernet network interface.One of wireless network card serves as receiver, and another wireless network card serves as to be sent out
Penetrate machine.
Open router, first in the case of unmanned, stand 1min of the present invention, carry out the sampling of environment, then equipment starts to transport
Dynamic monitoring.First sends data when throwing the net locking, makes the second card of throwing the net obtain current channel status (CSI).
By analyzing the current channel number that second wireless network card obtains, through calculating, system obtains current environment for master control
Situation, and sense the change (including window, personnel walk about) in space in real time；Multigroup under obtaining unmanned house situation
Template set (herein referring to the fingerprint set often said) after CSI data, as family's normal condition.In owner
After leaving home, serve as the network interface card of transmitter and sent one group of data every one second, allow the network interface card serving as receiver obtain the data of CSI simultaneously
Process, the data after processing is contrasted with each of template set (fingerprint set) template.If finding not
Same, then alarm is carried out by network, if being connected with other equipment, other set can to send command operation by WIFI network
Standby.As networked with cradle head camera, photographic head can be made to start shooting, and rotate video recording, monitoring family concrete condition；If dynamic with other
Make module networking (as alarm bell), then can be reported to the police.
The purposes of this motion detection router is quite varied, is not only used in family's cloth and puts, and can be used in evening
Between market security monitoring on.Fixedly secured router detects motion, then send alarm to Security Personnel, and in daily record
On record the sequence number of node, the video camera coding with surrounding.This not only can reduce the workload of security protection personnel, acceptable
Send alarm in time and prevent criminal behavior.Compared with extensive arrangement motion sensor, its cost is very cheap, and an equipment covers
Capping amasss also very big.If complete quotient field is arranged, in the case of can be implemented in the unmanned shopping of market night, determine mobile target
Mobile route.And when doing business daytime in market, router can provide network service as WIFI access point, increase client in business
The residence time of field, improve sales volume.
Claims (1)
1. a kind of motion detection router based on wireless network signal physical layer disturbance is it is characterised in that this motion detection road
Wireless network card, data processing section and three parts of network interface are included by device；
Wireless network card includes two and supports to obtain the wireless network card of CSI, and first wireless network card serves as transmitter and send message, fixed
When send data to second wireless network card, make second wireless network card obtain the CSI under current environment；Second wireless network card
Serve as receiver, current environmental condition is judged by the CSI data obtaining the generation in communication process；
Data processing section includes Flash chip, RAM and master control；Master control is the CPU that can run Openwrt, and master control obtains CSI
Carry out Treatment Analysis after data, and by each template in the set of contrast mould successively, it is determined whether environment change or
There is motion；RAM not less than 32MB and the Flash chip not less than 4MB capacity are used for the storage of program and the temporary of data；Many
Platform motion detection router component movement detects network, if there being object of which movement in motion detection network, real-time tracking object
Motion path, carries out, by multiple stage motion detection router in motion detection network, the substantially position that triangle polyester fibre determines mobile object
Put；Motion detection router passes through network interface connection to main frame, when it is in monitoring state, by present circumstances Real-time Feedback
To security protection personnel, and send alarm when having motion to occur, the node that the security protection personnel motion of prompting occurs, write information into
Daily record；
When in environment to be measured, there are objects moving, there is significant change in CSI, gathered by contrast mould, find no in error
The template of coupling in allowed band, is judged that in current environment space, there are objects moving or environment there occurs change, is sent out by netting twine
Go out alarm signal；Determine movement position by checking its numbering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610951393.3A CN106453107A (en) | 2016-10-27 | 2016-10-27 | Motion detection router based on wireless network signal physical layer disturbance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610951393.3A CN106453107A (en) | 2016-10-27 | 2016-10-27 | Motion detection router based on wireless network signal physical layer disturbance |
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| Publication Number | Publication Date |
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| CN106453107A true CN106453107A (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610951393.3A Pending CN106453107A (en) | 2016-10-27 | 2016-10-27 | Motion detection router based on wireless network signal physical layer disturbance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106971474A (en) * | 2017-04-10 | 2017-07-21 | 南京苗米科技有限公司 | Intrusion detection method and system based on WIFI wireless signals |
| CN107333105A (en) * | 2017-07-14 | 2017-11-07 | 中国矿业大学 | A kind of downhole intelligent video monitoring system and monitoring method based on WIFI |
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| CN104766427A (en) * | 2015-04-27 | 2015-07-08 | 太原理工大学 | Detection method for illegal invasion of house based on Wi-Fi |
| WO2015119635A1 (en) * | 2014-02-10 | 2015-08-13 | Hewlett Packard Development Company, L.P. | Distance estimation |
| CN105303743A (en) * | 2015-09-15 | 2016-02-03 | 北京腾客科技有限公司 | WiFi-based indoor intrusion detection method and device |
| CN105448124A (en) * | 2015-11-27 | 2016-03-30 | 苏州云达通信科技有限公司 | Vehicle tracking positioning system based on WIFI |
| CN105960016A (en) * | 2016-06-23 | 2016-09-21 | 成都信息工程大学 | RSSI acquisition method |
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2016
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015119635A1 (en) * | 2014-02-10 | 2015-08-13 | Hewlett Packard Development Company, L.P. | Distance estimation |
| CN104766427A (en) * | 2015-04-27 | 2015-07-08 | 太原理工大学 | Detection method for illegal invasion of house based on Wi-Fi |
| CN105303743A (en) * | 2015-09-15 | 2016-02-03 | 北京腾客科技有限公司 | WiFi-based indoor intrusion detection method and device |
| CN105448124A (en) * | 2015-11-27 | 2016-03-30 | 苏州云达通信科技有限公司 | Vehicle tracking positioning system based on WIFI |
| CN105960016A (en) * | 2016-06-23 | 2016-09-21 | 成都信息工程大学 | RSSI acquisition method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106971474A (en) * | 2017-04-10 | 2017-07-21 | 南京苗米科技有限公司 | Intrusion detection method and system based on WIFI wireless signals |
| CN106971474B (en) * | 2017-04-10 | 2020-02-04 | 南京苗米科技有限公司 | Intrusion monitoring method and system based on WIFI wireless signal |
| CN107333105A (en) * | 2017-07-14 | 2017-11-07 | 中国矿业大学 | A kind of downhole intelligent video monitoring system and monitoring method based on WIFI |
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Application publication date: 20170222 |