CN103906118B - A kind of wlan network terminal uplink interference estimation method and device - Google Patents
A kind of wlan network terminal uplink interference estimation method and device Download PDFInfo
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- CN103906118B CN103906118B CN201210571926.7A CN201210571926A CN103906118B CN 103906118 B CN103906118 B CN 103906118B CN 201210571926 A CN201210571926 A CN 201210571926A CN 103906118 B CN103906118 B CN 103906118B
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Abstract
The invention discloses a kind of wlan network terminal uplink interference estimation method and device, this method includes：According to the AP signal parameters of the default terminal signaling parameter for reporting granularity, gradually obtaining terminal, and adjacent AP；According to adjacent AP channels, calculate the interchannel interference factor for obtaining adjacent AP, according to terminal uplink signal intensity, adjacent AP uplink signal strengths and the interchannel interference factor, calculate and obtain the first each up signal to noise ratio of terminal, according to the first each up signal to noise ratio of terminal, calculate the first up signal to noise ratio and account for the interference percentage for always reporting number of times less than the number of times for presetting up signal to noise ratio；Judge whether interference percentage is more than default interference percentage, there is interference during judging that terminal uses wlan network carry out business more than if.The up signal to noise ratio of acquisition is directly calculated by existing acquisition parameter, the precision for assessing the uplink interference situation of wlan network user is improved.
Description
Technical field
The present invention relates to the communication technology in communication network, more particularly to a kind of wlan network terminal uplink interference assessment side
Method and device.
Background technology
As major operators carry forward vigorously WLAN（Wireless Local Area Networks, referred to as
WLAN）The release with various mobile internet devices is built in deployment, and WLAN wireless networks have become the important load of data service
Body.In short supply yet with the frequency spectrum resource of wlan network, multiple operators are multiplexed limited frequency resource, cause accessing wirelessly to connect
Access point（Access Point, abbreviation AP）The investigation of interference problem turns into the technological difficulties that wlan network optimizes.
Investigation wlan network user's is up with the presence or absence of interference in the prior art, mainly there is following two methods：
Method one, field measurement is carried out by test instrumentation.Test instrumentation is used by tester, focus WLAN is covered
Region carries out operational trials, assesses whether there is uplink interference according to up test case in operational trials.
Method two, index analysis is carried out by WLAN webmasters.By in interference index of correlation of the WLAN webmasters side to each AP
（Such as abnormal drop rate, uplink transmission rate）It is acquired and analyzes, according to the incidence relation between index, finds out interference and refer to
The AP of difference is marked, determination range is reduced, then field measurement these AP assess whether there is interference.
However, both appraisal procedures can only all test downstream signal interference, it is mainly logical for upward signal interference
The signal intensity of on-the-spot test, upstream rate is crossed to be judged, and there is exception in the index related to interference, it may be possible to by other
Reason is caused, such as weak covering of network, AP plant issues etc., therefore can not accurately assess the uplink interference feelings of wlan network user
Condition.
The content of the invention
For the drawbacks described above of conventional art, the embodiment of the present invention provides a kind of wlan network terminal uplink interference assessment side
Method and device.
The embodiment of the present invention provides a kind of wlan network terminal uplink interference estimation method, including：
It is described according to the AP signal parameters of the default terminal signaling parameter for reporting granularity, gradually obtaining terminal, and adjacent AP
Terminal signaling parameter includes terminal uplink signal intensity, and it is up that the AP signal parameters include adjacent AP channels and adjacent AP
Signal intensity；
According to the adjacent AP channels, the interchannel interference factor for obtaining the adjacent AP is calculated, according in the terminal
Row signal intensity, the adjacent AP uplink signal strengths and the interchannel interference factor, calculate the acquisition terminal each
The first up signal to noise ratio, according to the first each up signal to noise ratio of the terminal, calculate the first up signal to noise ratio and be less than
The number of times for presetting up signal to noise ratio accounts for the interference percentage for always reporting number of times；
Judge whether the interference percentage is more than default interference percentage, if more than the default interference percentage,
Judge that the terminal has interference during using wlan network carry out business.
The embodiment of the present invention provides a kind of wlan network terminal uplink interference assessment device, including：
Acquisition module, for the AP according to the default terminal signaling parameter for reporting granularity, gradually obtaining terminal, and adjacent AP
Signal parameter, the terminal signaling parameter includes terminal uplink signal intensity, and the AP signal parameters include adjacent AP letters
Road and adjacent AP uplink signal strengths；
First computing module, obtained for according to the adjacent AP channels, calculating the interchannel interference of the adjacent AP because
Son, according to the terminal uplink signal intensity, the adjacent AP uplink signal strengths and the interchannel interference factor, is calculated
The first each up signal to noise ratio of the terminal is obtained, according to the first each up signal to noise ratio of the terminal, described the is calculated
The number of times that one up signal to noise ratio is less than default up signal to noise ratio accounts for the interference percentage for always reporting number of times；
Uplink interference judge module, for judging whether the interference percentage is more than default interference percentage, if being more than
The default interference percentage, then judge that the terminal has interference during using wlan network carry out business.
In the technical scheme of the present embodiment, wlan network terminal uplink interference assessment device is obtained from WLAN AC equipment
The terminal signaling parameter collected every time and adjacent AP AP signal parameters are taken as collecting sample, according to terminal signaling parameter and
Adjacent AP AP signal parameters calculate the first up signal to noise ratio of each collecting sample, on count all collecting samples first
Row signal to noise ratio, calculate the first up signal to noise ratio be less than preset up signal to noise ratio collecting sample number account for always report number of times do
Percentage is disturbed, judges whether interference percentage is more than default interference percentage, if judging the terminal using business more than if
During exist interference.By using the parameter collected in existing WLAN AC equipment, calculate terminal and use process in business
Signal to noise ratio, and then directly judge AP disturbed condition, improve the accurate of the uplink interference situation of assessing wlan network user
Degree, while without artificial field test, reducing assessed cost.
Brief description of the drawings
Fig. 1 is the flow chart of wlan network terminal uplink interference estimation method first embodiment of the present invention；
Fig. 2 is the flow chart of wlan network terminal uplink interference estimation method second embodiment of the present invention；
Fig. 3 is the flow chart of wlan network terminal uplink interference estimation method 3rd embodiment of the present invention；
Fig. 4 is the structural representation of wlan network terminal uplink interference assessment device first embodiment of the present invention；
Fig. 5 is the structural representation of wlan network terminal uplink interference assessment device second embodiment of the present invention；
Fig. 6 is the structural representation of wlan network terminal uplink interference assessment device 3rd embodiment of the present invention；
Fig. 7 is the schematic diagram of the computational methods of the first up signal to noise ratio.
Embodiment
Fig. 1 is the flow chart of wlan network terminal uplink interference estimation method first embodiment of the present invention, as shown in figure 1,
Wlan network terminal uplink interference estimation method provided in an embodiment of the present invention is by wlan network terminal uplink interference assessment device
Perform, the wlan network terminal uplink interference assessment device is arranged on the server of network side, with wireless controller
（Wireless Access Point Controller, abbreviation AC）Communication connection.
Due to wlan network resource scarcity, multiple Virtual network operators are multiplexed limited frequency resource, and when multiple AP letter
When road is adjacent, AP can receive adjacent AP signal in addition to it can receive the upward signal of terminal, also, therefore exist between AP
Signal interference problem.
Wlan network terminal uplink interference assessment apparatus for evaluating can be realized in the form of software and/or hardware, be somebody's turn to do
Method includes：
Step S100, according to the AP signals of the default terminal signaling parameter for reporting granularity, gradually obtaining terminal, and adjacent AP
Parameter, the terminal signaling parameter includes terminal uplink signal intensity, the AP signal parameters include adjacent AP channels and
Adjacent AP uplink signal strengths；
Step S102, according to the adjacent AP channels, calculates the interchannel interference factor for obtaining the adjacent AP, according to institute
Terminal uplink signal intensity, the adjacent AP uplink signal strengths and the interchannel interference factor are stated, calculates and obtains described
The first each up signal to noise ratio of terminal, according to the first each up signal to noise ratio of the terminal, calculates the first up letter
Make an uproar and the interference percentage of number of times is always reported than being accounted for less than the number of times for presetting up signal to noise ratio；
Step S104, judges whether the interference percentage is more than default interference percentage, if more than the default interference
Percentage, then into step S106；
Step S106, judges that the terminal has interference during using wlan network carry out business.
Specifically, wlan network terminal uplink interference assessment device is communicated to connect with WLAN AC, and terminal is connected to WLAN nets
During network, the terminal reports granularity according to default, regularly reports its terminal signaling parameter to WLAN AC, existing WLAN AC equipment
The terminal signaling parameter for supporting collection terminal to report, wherein terminal signaling parameter includes terminal uplink signal intensity.
Wlan network terminal uplink interference assessment device obtains the terminal signaling parameter for the terminal that WLAN AC are sent.
Due to that can be interfered when multiple AP channels are adjacent, AP can be detected when running and deposited in WLAN wireless network environments
It is other with frequency and adjacent frequency signals, therefore WLAN AC equipment can also collect adjacent AP AP signal parameters, wlan network
Terminal uplink interference assessment device obtains the AP signal parameters for the adjacent AP that WLAN AC equipment is sent, wherein in AP signal parameters
Including adjacent AP channels and adjacent AP uplink signal strengths.
Because wlan network uses OFDM technology, according to OFDM modulation principles and IEEE802.11 standards, pass through MATLAB
Emulation can obtain the interchannel interference factor between WLAN channels, table specific as follows：
According to adjacent AP channels and this AP channels, it is known that adjacent AP and this AP channel spacing, such as adjacent AP channels are
Channel 1, this AP channels are channel 3, then the channel spacing between adjacent AP channels and this AP channels is 2, when channel spacing is 2
When, it is known that the interchannel interference factor is 0.3249.
WLAN AC are obtained according to the default terminal signaling parameter for reporting granularity to report and AP signal parameters, wherein on default
The preset value that granularity is operator is reported, for example, presets and reports granularity to be five minutes, the terminal is carrying out business using wlan network
During, its terminal signaling parameter is reported once within every 5 minutes, because terminal uplink signal intensity can change, therefore often
Secondary terminal signaling parameter is incomplete same, and same adjacent AP AP signal parameters are also incomplete same.Terminal wlan network terminal
Uplink interference apparatus for evaluating obtains the terminal each terminal signaling parameter that WLAN AC are sent during business use and AP
Signal parameter, and using each terminal signaling parameter and AP signal parameters as a collecting sample, according to terminal uplink signal
Intensity, adjacent AP uplink signal strengths and the interchannel interference factor, calculate the first up letter of terminal in each collecting sample
Make an uproar ratio.
The first up signal to noise ratio of all collecting samples is counted, the first up noise for being less than and presetting up signal to noise ratio is calculated
The collecting sample number of ratio accounts for the interference percentage for always reporting number of times.Wherein preset the preset value that up signal to noise ratio is operator.
Judge whether interference percentage is more than default interference percentage, if more than preset percentage, judging that the terminal exists
There is interference during using wlan network carry out business.Wherein preset percentage is the preset value of operator.
In a preferred embodiment, described to preset up signal to noise ratio for 5db, the default interference percentage is 10%.
In the technical scheme of the present embodiment, wlan network terminal uplink interference assessment device is obtained from WLAN AC equipment
The terminal signaling parameter collected every time and adjacent AP AP signal parameters are taken as collecting sample, according to terminal signaling parameter and
Adjacent AP AP signal parameters calculate the first up signal to noise ratio of each collecting sample, on count all collecting samples first
Row signal to noise ratio, calculate the first up signal to noise ratio be less than preset up signal to noise ratio collecting sample number account for always report number of times do
Percentage is disturbed, judges whether interference percentage is more than default interference percentage, if judging the terminal using business more than if
During exist interference.By using the parameter collected in existing WLAN AC equipment, calculate terminal and use process in business
Signal to noise ratio, and then directly judge AP disturbed condition, improve the accurate of the uplink interference situation of assessing wlan network user
Degree, while without artificial field test, reducing assessed cost.
Fig. 2 is the flow chart of wlan network terminal uplink interference estimation method second embodiment of the present invention, as shown in Fig. 2
The present embodiment is performed by wlan network terminal uplink interference assessment device, and the device can use the form of software and/or hardware
To realize, this method includes：
Step S200, according to the AP signals of the default terminal signaling parameter for reporting granularity, gradually obtaining terminal, and adjacent AP
Parameter, the terminal signaling parameter includes terminal uplink signal intensity, and the AP signal parameters include adjacent AP physically
Location, adjacent AP channels and adjacent AP uplink signal strengths；
Step S202, judges whether the adjacent AP is multiple according to the adjacent AP physical address, if then entering step
Rapid S204, if otherwise entering step S206；
Step S204, according to each adjacent AP channels, the interchannel that each adjacent AP of acquisition is calculated respectively is done
The factor is disturbed, according to the terminal uplink signal intensity, each adjacent AP uplink signal strengths and each interchannel
Interference factor, calculates and obtains the second each up signal to noise ratio of the terminal, according to the second each up noise of the terminal
Than calculating the second up signal to noise ratio and being less than the number of times for presetting up signal to noise ratio and account for the interference hundred for always reporting number of times
Divide ratio, into step S208；
Step S206, according to the adjacent AP channels, calculates the interchannel interference factor for obtaining the adjacent AP, according to institute
Terminal uplink signal intensity, the adjacent AP uplink signal strengths and the interchannel interference factor are stated, calculates and obtains described
The first each up signal to noise ratio of terminal, according to the first each up signal to noise ratio of the terminal, calculates the first up letter
Make an uproar and the interference percentage of number of times is always reported than being accounted for less than the number of times for presetting up signal to noise ratio, into step S208；
Step S208, judges whether the interference percentage is more than default interference percentage, if more than the default interference
Percentage, then into step S210；
Step S210, judges that the terminal has interference during using wlan network carry out business.
Specifically, wlan network terminal uplink interference assessment device obtains the terminal for the terminal that WLAN AC are sent every time
Signal parameter and AP signal parameters, terminal signaling parameter each time and AP signal parameters are as a collecting sample, wherein eventually
End signal parameter includes terminal uplink signal intensity, AP signal parameters include adjacent AP physical address, adjacent AP channels and
Adjacent AP uplink signal strengths.Due to there may be other multiple AP near AP, thus WLAN AC may receive it is multiple adjacent
The AP signal parameters that AP is sent, wherein adjacent AP physical address is globally unique physical address, for identifying adjacent AP.
Judge whether adjacent AP physical address has multiple in the adjacent AP signal parameters in each collecting sample, if then dividing
Not Ji Suan each adjacent AP the interchannel interference factor, that is, obtain each adjacent AP adjacent AP channels, calculate each adjacent AP
Channel spacing between this AP, according to OFDM modulation principles and IEEE802.11 standards, can be obtained by MATLAB emulation
The interchannel interference factor between WLAN channels, circular is：
According to OFDM modulation principles, normalized ofdm signal complex envelope is：
WhereinIt is normalization factor, fi=fc+i/T.The power spectral density of ofdm signal | spec (f) |2For N number of son
Power spectrum density sum on carrier wave.
In addition, the IF wave filters of IEEE802.11 standard radio network interface card transmitting terminals and receiving terminal can be to the ofdm signal that passes through
Influence is produced, the power spectral density of its both sides is substantially reduced.Introduce the type network interface card IF filter freguency responses of PRISM II used
Function：
Next an overlapping function is introduced, it represents the overlapping degree of channel i and channel j on frequency f：overlap
(i, j, f)=Spec (ch (i, f)) Filt (ch (i, f)) Spec (ch (j, f)) Filt (ch (j, f)), wherein
The function is integrated in 2350MHz to 2550MHz frequency ranges, calculate interference between channel i and channel j because
Son, calculation formula is as follows：
Wherein olf0It is the normalization constant of interference factor, it is defined as cochannel interference factor, and calculation formula is as follows：
Calculated by Matlab softwares, interference factor between following different channels can be obtained：
After the interchannel interference factor for obtaining each adjacent AP, according to terminal uplink signal intensity, each adjacent AP phase
Adjacent AP uplink signal strengths and the interchannel interference factor, calculate the second up signal to noise ratio of the terminal in each collecting sample.
The second up signal to noise ratio of all collecting samples is counted, the second up noise for being less than and presetting up signal to noise ratio is calculated
The collecting sample number of ratio accounts for the interference percentage for always reporting number of times.Wherein preset the preset value that up signal to noise ratio is operator.
Judge whether interference percentage is more than default interference percentage, if more than preset percentage, judging that the terminal exists
There is interference during using wlan network carry out business.Wherein preset percentage is the preset value of operator.
Step S206 is identical with corresponding steps in above-described embodiment with step S208 specific method flow, no longer goes to live in the household of one's in-laws on getting married herein
State.
In a preferred embodiment, described to preset up signal to noise ratio for 5db, the default interference percentage is 10%.
In the technical scheme of the present embodiment, wlan network terminal uplink interference assessment device is obtained from WLAN AC equipment
The terminal signaling parameter collected every time and adjacent AP AP signal parameters are taken as collecting sample, according to terminal signaling parameter and
Adjacent AP AP signal parameters calculate the first up signal to noise ratio of each collecting sample, on count all collecting samples first
Row signal to noise ratio, calculate the first up signal to noise ratio be less than preset up signal to noise ratio collecting sample number account for always report number of times do
Percentage is disturbed, judges whether interference percentage is more than default interference percentage, if judging the terminal using business more than if
During exist interference.By using the parameter collected in existing WLAN AC equipment, calculate terminal and use process in business
Signal to noise ratio, and then directly judge AP disturbed condition, improve the accurate of the uplink interference situation of assessing wlan network user
Degree, while without artificial field test, reducing assessed cost.
Fig. 3 is the flow chart of wlan network terminal uplink interference estimation method 3rd embodiment of the present invention, as shown in figure 3,
The present embodiment is performed by wlan network terminal uplink interference assessment device, and the device can use the form of software and/or hardware
To realize, this method includes：
Step S300, according to the AP signals of the default terminal signaling parameter for reporting granularity, gradually obtaining terminal, and adjacent AP
Parameter, the terminal signaling parameter includes terminal uplink signal intensity, and the AP signal parameters include adjacent AP physically
Location, adjacent AP channels and adjacent AP uplink signal strengths；
Step S302, judges whether the adjacent AP is multiple according to the adjacent AP physical address, if otherwise entering step
Rapid S304, if then entering step S314；
Step S304, according to the adjacent AP channels, calculates the interchannel interference factor for obtaining the adjacent AP；
Step S306, calculates first according to the adjacent AP uplink signal strengths and the interchannel interference factor and disturbs
Value, after first interference value is multiplied equal to the adjacent AP uplink signal strengths with the interchannel interference factor square, then
Plus noise power；
Step S308, the first ratio is calculated according to first interference value and the terminal uplink signal intensity, and described the
One ratio is equal to the terminal uplink signal intensity divided by first interference value；
Step S310, the first up signal to noise ratio according to first ratio calculation, described first up signal to noise ratio etc.
It is multiplied by the logarithm of first ratio after N, subtracts the decay factor for overcoming multipath effect；
Step S312, according to the first each up signal to noise ratio of the terminal, calculates the first up signal to noise ratio and is less than
The number of times for presetting up signal to noise ratio accounts for the interference percentage for always reporting number of times, into step S324；
Step S314, according to each adjacent AP channels, the interchannel that each adjacent AP of acquisition is calculated respectively is done
Disturb the factor；
Step S316, the is calculated according to each adjacent AP uplink signal strengths and each interchannel interference factor
Two interference values, second interference value is equal to flat to each adjacent AP uplink signal strengths and the interchannel interference factor
After the product summation of side, along with the noise power；
Step S318, the second ratio is calculated according to second interference value and the terminal uplink signal intensity, and described the
Two ratios are equal to the terminal uplink signal intensity divided by second interference value；
Step S320, the second up signal to noise ratio according to second ratio calculation, described second up signal to noise ratio etc.
It is multiplied by the logarithm of second ratio after N, subtracts the decay factor for overcoming multipath effect；
Step S322, according to the second each up signal to noise ratio of the terminal, calculates the second up signal to noise ratio and is less than
The number of times for presetting up signal to noise ratio accounts for the interference percentage for always reporting number of times, into step S324；
Step S324, judges whether the interference percentage is more than default interference percentage, if more than the default interference
Percentage, then into step S326；
Step S326, judges that the terminal has interference during using wlan network carry out business.
Specifically, wlan network terminal uplink interference assessment device obtains the terminal for the terminal that WLAN AC are sent every time
Signal parameter and AP signal parameters, terminal signaling parameter each time and AP signal parameters are as a collecting sample, wherein eventually
End signal parameter includes terminal uplink signal intensity, AP signal parameters include adjacent AP physical address, adjacent AP channels and
Adjacent AP uplink signal strengths, judge whether adjacent AP physical address has many in the adjacent AP signal parameters in each collecting sample
It is individual.
When adjacent AP physical address only has one, according to adjacent AP channel calculations adjacent AP interchannel interference because
Son, specific method flow is identical with corresponding step in above-described embodiment.
Fig. 7 is the schematic diagram of the computational methods of the first up signal to noise ratio, as shown in fig. 7, A points are AP1, C points are adjacent
AP2, wherein AP1 and AP2 transmission power are Pap, the distance between A and C are D2；B points are the terminal being associated with AP1
STA, its transmission power is Psta, the distance of A, B each other is D1.
The field strength that A receives B is signal, and the field strength that A receives C is noise.A the first up letter is calculated by below equation
Make an uproar ratio.
Wherein PsignalFor the terminal uplink signal intensity of A points, the value can be gathered by the WLAN AC equipment of A points
Arrive；PinterfrenceFor A point interference signal intensities, as AP2 adjacent AP uplink signal strengths, the value can pass through A points
WLAN AC equipment is collected；olfi,jFor the interchannel interference factor；PnoiseIt is noise power, takes -95dBm；MFadeFor for
Overcome the decay factor of multipath effect, take 1dB.
For example, AP1 is No. 6 channels, AP2 is to have an associated terminal, terminal uplink signal intensity under No. 8 channels, AP1
For -53dB, the adjacent AP uplink signal strengths that AP1 receives AP2 are -69dB, PnoiseIt is minimum negligible, then the first of AP1
Up signal to noise ratio snr=- 5-3- (- 69）olfi,j- 2=24.77dB.
When adjacent AP physical address is multiple, according to each adjacent AP channels, calculates obtain each described respectively
The adjacent AP interchannel interference factor, specific method flow is identical with corresponding step in above-described embodiment.Second up noise
The computational methods of ratio are：
The interference signal that A points AP is received has multiple, then needs interference signal being overlapped, with APiRepresent to wait to ask second
The AP of up signal to noise ratio, APjThe adjacent AP of interference is represented, then the calculation formula of the second up signal to noise ratio of terminal STA is such as at A points
Under：
Wherein：PinterferencejRepresent j-th of adjacent AP uplink signal strength.
For example, AP1 is No. 1 channel, terminal uplink signal intensity is -53dB；AP1 receives 3 adjacent AP signal altogether, bag
Include：
AP2：No. 1 channel, field strength is -60dBm；
AP3：No. 2 channels, field strength is -62dBm；
AP4：No. 3 channels, field strength is -65dBm.
Based on above-mentioned formula, the second up signal to noise ratio that AP1 receives terminal STA can be obtained：
Step S322 is identical with corresponding steps in above-described embodiment with step S324 specific method flow, no longer goes to live in the household of one's in-laws on getting married herein
State.
In a preferred embodiment, described to preset up signal to noise ratio for 5db, the default interference percentage is 10%.
In the technical scheme of the present embodiment, wlan network terminal uplink interference assessment device is obtained from WLAN AC equipment
The terminal signaling parameter collected every time and adjacent AP AP signal parameters are taken as collecting sample, according to terminal signaling parameter and
Adjacent AP AP signal parameters calculate the first up signal to noise ratio of each collecting sample, on count all collecting samples first
Row signal to noise ratio, calculate the first up signal to noise ratio be less than preset up signal to noise ratio collecting sample number account for always report number of times do
Percentage is disturbed, judges whether interference percentage is more than default interference percentage, if judging the terminal using business more than if
During exist interference.By using the parameter collected in existing WLAN AC equipment, calculate terminal and use process in business
Signal to noise ratio, and then directly judge AP disturbed condition, improve the accurate of the uplink interference situation of assessing wlan network user
Degree, while without artificial field test, reducing assessed cost.
Fig. 4 is the structural representation of wlan network terminal uplink interference assessment device first embodiment of the present invention, such as Fig. 4 institutes
Show, the device can be realized in the form of software and/or hardware, including acquisition module 11, the first computing module 12 and upper
Row interference judge module 13, wherein：
Acquisition module 11, presets for basis and reports granularity, gradually the terminal signaling parameter of acquisition terminal, and adjacent AP
AP signal parameters, the terminal signaling parameter includes terminal uplink signal intensity, and the AP signal parameters include adjacent AP
Channel and adjacent AP uplink signal strengths；
First computing module 12, for according to the adjacent AP channels, calculating the interchannel interference for obtaining the adjacent AP
The factor, according to the terminal uplink signal intensity, the adjacent AP uplink signal strengths and the interchannel interference factor, meter
Calculate and obtain the first each up signal to noise ratio of the terminal, according to the first each up signal to noise ratio of the terminal, calculate described
The number of times that first up signal to noise ratio is less than default up signal to noise ratio accounts for the interference percentage for always reporting number of times；
Uplink interference judge module 13, for judging whether the interference percentage is more than default interference percentage, if greatly
In the default interference percentage, then judge that the terminal has interference during using wlan network carry out business.
Specifically, the first acquisition module 11 receives the terminal signaling parameter and AP signals ginseng for the terminal that WLAN AC are sent
Number, wherein terminal signaling parameter include terminal uplink signal intensity, and AP signal parameters are included on adjacent AP channels and adjacent AP
Row signal intensity, using each terminal signaling parameter and AP signal parameters as a collecting sample, and sends to the first calculating
Module 12.
First computing module 12 calculates the interchannel interference factor for obtaining the adjacent AP according to the adjacent AP channels.
Because wlan network uses OFDM technology, the first computing module 12 passes through according to OFDM modulation principles and IEEE802.11 standards
MATLAB emulation can obtain the interchannel interference factor between WLAN channels, table specific as follows：
According to adjacent AP channels and this AP channels, it is known that adjacent AP and this AP channel spacing, such as adjacent AP channels are
Channel 1, this AP channels are channel 3, then the channel spacing between adjacent AP channels and this AP channels is 2, when channel spacing is 2
When, it is known that the interchannel interference factor is 0.3249.
First computing module 12 according to terminal uplink signal intensity, adjacent AP uplink signal strengths and interchannel interference because
Son, calculates the first up signal to noise ratio of terminal in each collecting sample.The first up signal to noise ratio of all collecting samples is counted, is counted
The collecting sample number for calculating the first up signal to noise ratio for being less than default up signal to noise ratio accounts for the interference percentage for always reporting number of times.Its
In preset the preset value that up signal to noise ratio is operator, send interference percentage to uplink interference judge module 13.
Uplink interference judge module 13 judges whether interference percentage is more than default interference percentage, if more than default percentage
Than then judging that the terminal has interference during using wlan network carry out business.Wherein preset percentage is operator
Preset value.
In a preferred embodiment, described to preset up signal to noise ratio for 5db, the default interference percentage is 10%.
In the technical scheme of the present embodiment, wlan network terminal uplink interference assessment device is obtained from WLAN AC equipment
The terminal signaling parameter collected every time and adjacent AP AP signal parameters are taken as collecting sample, according to terminal signaling parameter and
Adjacent AP AP signal parameters calculate the first up signal to noise ratio of each collecting sample, on count all collecting samples first
Row signal to noise ratio, calculate the first up signal to noise ratio be less than preset up signal to noise ratio collecting sample number account for always report number of times do
Percentage is disturbed, judges whether interference percentage is more than default interference percentage, if judging the terminal using business more than if
During exist interference.By using the parameter collected in existing WLAN AC equipment, calculate terminal and use process in business
Signal to noise ratio, and then directly judge AP disturbed condition, improve the accurate of the uplink interference situation of assessing wlan network user
Degree, while without artificial field test, reducing assessed cost.
Fig. 5 is the structural representation of wlan network terminal uplink interference assessment device second embodiment of the present invention, such as Fig. 5 institutes
Show, the device can be realized in the form of software and/or hardware, including acquisition module 21, adjacent AP quantity judge module
22nd, the first computing module 23, the second computing module 24 and uplink interference judge module 25, acquisition module 21, the first computing module
23 and uplink interference judge module 25 function realizing method it is identical with the corresponding module in above-described embodiment, herein no longer go to live in the household of one's in-laws on getting married
State, wherein：
Adjacent AP quantity judge module 22, for judging whether the adjacent AP is many according to the adjacent AP physical address
It is individual；
Second computing module 24, when judging the adjacent AP for the adjacent AP quantity judge module to be multiple, according to
Each adjacent AP channels, calculate the interchannel interference factor for obtaining each adjacent AP, according in the terminal respectively
Row signal intensity, each adjacent AP uplink signal strengths and each interchannel interference factor, calculate and obtain described
The second each up signal to noise ratio of terminal, according to the second each up signal to noise ratio of the terminal, calculates the second up letter
Make an uproar than accounting for the interference percentage for always reporting number of times less than the number of times for presetting up signal to noise ratio.
Specifically, acquisition module 21 obtains terminal signaling parameter and the AP signal parameters that WLAN AC are sent, and wherein terminal is believed
Number parameter includes terminal uplink signal intensity, and AP signal parameters include adjacent AP channels, adjacent AP physical address and adjacent AP
Uplink signal strength, using each terminal signaling parameter and AP signal parameters as a collecting sample, and sends to adjacent AP
Quantity judge module 22.
Adjacent AP quantity judge module 22 judges that adjacent AP is physically in the adjacent AP signal parameters in each collecting sample
It is multiple whether location has, notified if adjacent AP physical address only has one the first computing module 23 calculate the first up signal to noise ratio and
Percentage is disturbed, and sends interference percentage to uplink interference judge module 25；Lead to if adjacent AP physical address more than one
Know that the second computing module 24 calculates the second up signal to noise ratio and interference percentage, and send interference percentage to uplink interference and judge
Module 25.
Second computing module 24 calculate the second up signal to noise ratio specific method be：
The each adjacent AP interchannel interference factor is calculated respectively, that is, is obtained each adjacent AP adjacent AP channels, calculated
Channel spacing between each adjacent AP and this AP, it is imitative by MATLAB according to OFDM modulation principles and IEEE802.11 standards
The interchannel interference factor between WLAN channels can be very obtained, circular is：
According to OFDM modulation principles, normalized ofdm signal complex envelope is：
WhereinIt is normalization factor, fi=fc+i/T.The power spectral density of ofdm signal | spec (f) |2For N number of son
Power spectrum density sum on carrier wave
In addition, the IF wave filters of IEEE802.11 standard radio network interface card transmitting terminals and receiving terminal can be to the ofdm signal that passes through
Influence is produced, the power spectral density of its both sides is substantially reduced.Introduce the type network interface card IF filter freguency responses of PRISM II used
Function：
Next an overlapping function is introduced, it represents the overlapping degree of channel i and channel j on frequency f：overlap
(i, j, f)=Spec (ch (i, f)) Filt (ch (i, f)) Spec (ch (j, f)) Filt (ch (j, f)), wherein
The function is integrated in 2350MHz to 2550MHz frequency ranges, calculate interference between channel i and channel j because
Son, calculation formula is as follows：
Wherein olf0It is the normalization constant of interference factor, it is defined as cochannel interference factor, and calculation formula is as follows：
Calculated by Matlab softwares, interference factor between following different channels can be obtained：
After the interchannel interference factor for obtaining each adjacent AP, according to terminal uplink signal intensity, each adjacent AP phase
Adjacent AP uplink signal strengths and the interchannel interference factor, calculate the second up signal to noise ratio of the terminal in each collecting sample.
The second up signal to noise ratio of all collecting samples is counted, the second up noise for being less than and presetting up signal to noise ratio is calculated
The collecting sample number of ratio accounts for the interference percentage for always reporting number of times.Wherein preset the preset value that up signal to noise ratio is operator.
In a preferred embodiment, described to preset up signal to noise ratio for 5db, the default interference percentage is 10%.
In the technical scheme of the present embodiment, wlan network terminal uplink interference assessment device is obtained from WLAN AC equipment
The terminal signaling parameter collected every time and adjacent AP AP signal parameters are taken as collecting sample, according to terminal signaling parameter and
Adjacent AP AP signal parameters calculate the first up signal to noise ratio of each collecting sample, on count all collecting samples first
Row signal to noise ratio, calculate the first up signal to noise ratio be less than preset up signal to noise ratio collecting sample number account for always report number of times do
Percentage is disturbed, judges whether interference percentage is more than default interference percentage, if judging the terminal using business more than if
During exist interference.By using the parameter collected in existing WLAN AC equipment, calculate terminal and use process in business
Signal to noise ratio, and then directly judge AP disturbed condition, improve the accurate of the uplink interference situation of assessing wlan network user
Degree, while without artificial field test, reducing assessed cost.
Fig. 6 is the structural representation of wlan network terminal uplink interference assessment device 3rd embodiment of the present invention, such as Fig. 6 institutes
Show, the device can be realized in the form of software and/or hardware, including acquisition module 31, adjacent AP quantity judge module
32nd, the first computing module 33, the second computing module 34 and uplink interference judge module 35, acquisition module 31, adjacent AP quantity are sentenced
The function realizing method of disconnected module 32 and uplink interference judge module 35 is identical with the corresponding module in above-described embodiment, herein
Repeat no more, wherein：
First computing module 33 includes：
The first computing unit of the interchannel interference factor 331, obtains described adjacent for according to the adjacent AP channels, calculating
The AP interchannel interference factor；
First interference value computing unit 332, for according to the adjacent AP uplink signal strengths and the interchannel interference
The factor calculates the first interference value, first interference value be equal to the adjacent AP uplink signal strengths and the interchannel interference because
After son square is multiplied, along with noise power；
First ratio calculation unit 333, for according to first interference value and terminal uplink signal intensity calculating
First ratio, first ratio is equal to the terminal uplink signal intensity divided by first interference value；
First up signal-to-noise ratio computation unit 334, for the first up signal to noise ratio according to first ratio calculation,
The logarithm that the first up signal to noise ratio is equal to first ratio is multiplied by after N, subtract for overcome the decay of multipath effect because
Son；
The first computing unit of percentage 335 is disturbed, for according to the first each up signal to noise ratio of the terminal, calculating institute
State the first up signal to noise ratio and account for the interference percentage for always reporting number of times less than the number of times for presetting up signal to noise ratio.
Second computing module 34 includes：
The second computing unit of the interchannel interference factor 341, for according to each adjacent AP channels, calculating obtain respectively
The each adjacent AP interchannel interference factor；
Second interference value computing unit 342, for according to each adjacent AP uplink signal strengths and each letter
Interference factor calculates the second interference value between road, and second interference value is equal to each adjacent AP uplink signal strengths and institute
After the product summation for stating the interchannel interference factor square, along with the noise power；
Second ratio calculation unit 343, for according to second interference value and terminal uplink signal intensity calculating
Second ratio, second ratio is equal to the terminal uplink signal intensity divided by second interference value；
Second up signal-to-noise ratio computation unit 344, for the second up signal to noise ratio according to second ratio calculation,
The logarithm that the second up signal to noise ratio is equal to second ratio is multiplied by after N, subtract for overcome the decay of multipath effect because
Son；
The second computing unit of percentage 345 is disturbed, for according to the second each up signal to noise ratio of the terminal, calculating institute
State the second up signal to noise ratio and be less than the number of times for presetting up signal to noise ratio and account for the interference percentage for always reporting number of times.
Specifically, adjacent AP quantity judge module 32 judges whether adjacent AP is multiple, is notified if adjacent AP is one
The first computing unit of the interchannel interference factor 331 of first computing module 33, obtains described adjacent according to adjacent AP channel calculations
Interference factor is to the first interference value computing unit 332 between the AP interchannel interference factor, concurrent channels.First interference value is calculated
Unit 332 calculates the first interference value according to adjacent AP uplink signal strengths and the interchannel interference factor, and sends the first interference value
To the first ratio calculation unit 333.First ratio calculation unit 333 is calculated according to the first interference value and terminal uplink signal intensity
First ratio, and send the first ratio to the first up signal-to-noise ratio computation unit 334.First up signal-to-noise ratio computation unit 334
According to first the first up signal to noise ratio of ratio calculation, and the first up signal to noise ratio is sent to the interference computing unit of percentage first
335.Disturb the first computing unit of percentage 335 according to the first each up signal to noise ratio of terminal, calculate the first up signal to noise ratio
Accounted for less than the number of times for presetting up signal to noise ratio and always report the interference percentage of number of times, then sent and disturb percentage to disturbing judgement
Module 35.
If adjacent AP quantity judge module 32 judges adjacent AP to be multiple, the interchannel of the second computing module 34 is notified to do
Disturb the second computing unit of the factor 341.The second computing unit of the interchannel interference factor 341 divides according to each adjacent AP channels
The each adjacent AP interchannel interference factor Ji Suan not be obtained, and sends each adjacent AP interchannel interference factor
To the second interference value computing unit 342, the second interference value computing unit 342 according to each adjacent AP uplink signal strengths and
Each interchannel interference factor calculates the second interference value, and sends the second interference value to the second ratio calculation unit 343.The
Two ratio calculation units 343 calculate the second ratio according to second interference value and the terminal uplink signal intensity, and send
Second ratio to the second up signal-to-noise ratio computation unit 344.Second up signal-to-noise ratio computation unit 344 is according to second ratio
The described second up signal to noise ratio is calculated, the second up signal to noise ratio is sent to the second computing unit of percentage 345 is disturbed, disturbs percentage
Than the second computing unit 345 according to the second each up signal to noise ratio of the terminal, calculate the second up signal to noise ratio and be less than
The number of times for presetting up signal to noise ratio accounts for the interference percentage for always reporting number of times, then sends interference percentage to interference
Judge module 35.
The wlan network terminal uplink interference assessment device that various embodiments of the present invention are provided is used to perform the embodiment of the present invention
The wlan network terminal uplink interference estimation method of offer, possesses corresponding functional module, will not be repeated here.
In a preferred embodiment, described to preset up signal to noise ratio for 5db, the default interference percentage is 10%.
In the technical scheme of the present embodiment, wlan network terminal uplink interference assessment device is obtained from WLAN AC equipment
The terminal signaling parameter collected every time and adjacent AP AP signal parameters are taken as collecting sample, according to terminal signaling parameter and
Adjacent AP AP signal parameters calculate the first up signal to noise ratio of each collecting sample, on count all collecting samples first
Row signal to noise ratio, calculate the first up signal to noise ratio be less than preset up signal to noise ratio collecting sample number account for always report number of times do
Percentage is disturbed, judges whether interference percentage is more than default interference percentage, if judging the terminal using business more than if
During exist interference.By using the parameter collected in existing WLAN AC equipment, calculate terminal and use process in business
Signal to noise ratio, and then directly judge AP disturbed condition, improve the accurate of the uplink interference situation of assessing wlan network user
Degree, while without artificial field test, reducing assessed cost.
It should be noted that：Above example is only to illustrate rather than limitation, and the present invention is also not limited to above-mentioned
Citing, all technical schemes for not departing from the spirit and scope of the present invention and its improvement, it all should cover the right in the present invention
In claimed range.
Claims (8)
1. a kind of wlan network terminal uplink interference estimation method, it is characterised in that including：
According to the AP signal parameters of the default terminal signaling parameter for reporting granularity, gradually obtaining terminal, and adjacent AP, the terminal
Signal parameter includes terminal uplink signal intensity, and the AP signal parameters include adjacent AP channels and adjacent AP upward signals
Intensity；
According to the adjacent AP channels, the interchannel interference factor for obtaining the adjacent AP is calculated, is believed according to the terminal uplink
Number intensity, the adjacent AP uplink signal strengths and the interchannel interference factor, calculate obtain the terminal it is each the
One up signal to noise ratio, according to the first each up signal to noise ratio of the terminal, calculates the first up signal to noise ratio less than default
The number of times of up signal to noise ratio accounts for the interference percentage for always reporting number of times；
Judge whether the interference percentage is more than default interference percentage, if more than the default interference percentage, judging
There is interference during using wlan network carry out business in the terminal；
The AP signal parameters include adjacent AP channels, adjacent AP physical address and adjacent AP uplink signal strengths；
The default terminal signaling parameter for reporting granularity, gradually obtaining terminal of the basis, and after adjacent AP AP signal parameters,
Also include：
Judge whether the adjacent AP is multiple according to the adjacent AP physical address；
If the adjacent AP is multiple, according to each adjacent AP channels, calculates obtain each adjacent AP's respectively
The interchannel interference factor, according to the terminal uplink signal intensity, each adjacent AP uplink signal strengths and each institute
State the interchannel interference factor, calculate and obtain the second each up signal to noise ratio of the terminal, according to the terminal it is each second
Up signal to noise ratio, calculates the second up signal to noise ratio and is less than the number of times for presetting up signal to noise ratio and accounts for and described always report number of times
Interference percentage.
2. wlan network terminal uplink interference estimation method according to claim 1, it is characterised in that described in the basis
Terminal uplink signal intensity, the adjacent AP uplink signal strengths and the interchannel interference factor, calculate and obtain the end
The first each up signal to noise ratio of end, including：
First interference value, first interference are calculated according to the adjacent AP uplink signal strengths and the interchannel interference factor
After value is multiplied equal to the adjacent AP uplink signal strengths with the interchannel interference factor square, along with noise power；
First ratio is calculated according to first interference value and the terminal uplink signal intensity, first ratio is equal to described
Terminal uplink signal intensity divided by first interference value；
The first up signal to noise ratio according to first ratio calculation, the first up signal to noise ratio is equal to first ratio
Logarithm be multiplied by after N, subtract the decay factor for overcoming multipath effect.
3. wlan network terminal uplink interference estimation method according to claim 1, it is characterised in that described in the basis
Terminal uplink signal intensity, each adjacent AP uplink signal strengths and each interchannel interference factor, calculating are obtained
The second each up signal to noise ratio of the terminal is obtained, including：
Second interference value is calculated according to each adjacent AP uplink signal strengths and each interchannel interference factor, it is described
Second interference value is equal to sums to the product of each adjacent AP uplink signal strengths and the interchannel interference factor square
Afterwards, along with noise power；
Second ratio is calculated according to second interference value and the terminal uplink signal intensity, second ratio is equal to described
Terminal uplink signal intensity divided by second interference value；
The second up signal to noise ratio according to second ratio calculation, the second up signal to noise ratio is equal to second ratio
Logarithm be multiplied by after N, subtract the decay factor for overcoming multipath effect.
4. wlan network terminal uplink interference estimation method according to claim 1, it is characterised in that described default up
Signal to noise ratio is 5db, and the default interference percentage is 10%.
5. a kind of wlan network terminal uplink interference assessment device, it is characterised in that including：
Acquisition module, for the AP signals according to the default terminal signaling parameter for reporting granularity, gradually obtaining terminal, and adjacent AP
Parameter, the terminal signaling parameter includes terminal uplink signal intensity, the AP signal parameters include adjacent AP channels and
Adjacent AP uplink signal strengths；
First computing module, for according to the adjacent AP channels, calculating the interchannel interference factor for obtaining the adjacent AP, root
According to the terminal uplink signal intensity, the adjacent AP uplink signal strengths and the interchannel interference factor, calculate and obtain
The first each up signal to noise ratio of the terminal, according to the first each up signal to noise ratio of the terminal, is calculated on described first
The number of times that row signal to noise ratio is less than default up signal to noise ratio accounts for the interference percentage for always reporting number of times；
Uplink interference judge module, for judging whether the interference percentage is more than default interference percentage, if more than described
Default interference percentage, then judge that the terminal has interference during using wlan network carry out business；
The AP signal parameters include adjacent AP channels, adjacent AP physical address and adjacent AP uplink signal strengths；
Described device also includes：
Adjacent AP quantity judge module, for judging whether the adjacent AP is multiple according to the adjacent AP physical address；
Second computing module, when judging the adjacent AP for the adjacent AP quantity judge module to be multiple, according to each institute
Adjacent AP channels are stated, the interchannel interference factor for obtaining each adjacent AP are calculated respectively, according to the terminal uplink signal
Intensity, each adjacent AP uplink signal strengths and each interchannel interference factor, calculate the acquisition terminal every
The second secondary up signal to noise ratio, according to the second each up signal to noise ratio of the terminal, calculates the second up signal to noise ratio small
The interference percentage for always reporting number of times is accounted in the number of times for presetting up signal to noise ratio.
6. wlan network terminal uplink interference assessment device according to claim 5, it is characterised in that described first calculates
Module includes：
The computing unit of the interchannel interference factor first, for according to the adjacent AP channels, calculating the letter for obtaining the adjacent AP
Interference factor between road；
First interference value computing unit, for according to the adjacent AP uplink signal strengths and interchannel interference factor calculating
First interference value, first interference value is equal to the adjacent AP uplink signal strengths and the interchannel interference factor square phase
After multiplying, along with noise power；
First ratio calculation unit, compares for calculating first according to first interference value and the terminal uplink signal intensity
Value, first ratio is equal to the terminal uplink signal intensity divided by first interference value；
First up signal-to-noise ratio computation unit, for the first up signal to noise ratio according to first ratio calculation, described
The logarithm that one up signal to noise ratio is equal to first ratio is multiplied by after N, subtracts the decay factor for overcoming multipath effect；
The computing unit of percentage first is disturbed, for according to the first each up signal to noise ratio of the terminal, calculating described first
The number of times that up signal to noise ratio is less than default up signal to noise ratio accounts for the interference percentage for always reporting number of times.
7. wlan network terminal uplink interference assessment device according to claim 5, it is characterised in that described second calculates
Module includes：
The computing unit of the interchannel interference factor second, for according to each adjacent AP channels, calculating obtain each institute respectively
State the adjacent AP interchannel interference factor；
Second interference value computing unit, for according to each adjacent AP uplink signal strengths and each interchannel interference
The factor calculates the second interference value, and second interference value is equal to each adjacent the AP uplink signal strengths and the interchannel
After the product summation of interference factor square, along with noise power；
Second ratio calculation unit, compares for calculating second according to second interference value and the terminal uplink signal intensity
Value, second ratio is equal to the terminal uplink signal intensity divided by second interference value；
Second up signal-to-noise ratio computation unit, for the second up signal to noise ratio according to second ratio calculation, described
The logarithm that two up signal to noise ratio are equal to second ratio is multiplied by after N, subtracts the decay factor for overcoming multipath effect；
The computing unit of percentage second is disturbed, for according to the second each up signal to noise ratio of the terminal, calculating described second
Up signal to noise ratio is less than the number of times for presetting up signal to noise ratio and accounts for the interference percentage for always reporting number of times.
8. wlan network terminal uplink interference assessment device according to claim 5, it is characterised in that described default up
Signal to noise ratio is 5db, and the default interference percentage is 10%.
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