CN103945409B - A kind of detection method and device of radio link quality - Google Patents
A kind of detection method and device of radio link quality Download PDFInfo
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Abstract
The present invention provides a kind of detection method and device of radio link quality, and wherein method includes：According to the transmission power of the terminal STA of acquisition, the transmission power between adjustment access point AP and STA, and utilize the transmission power of the AP after adjustment to send probe messages from AP to the STA；The response message that the probe messages are returned, acquisition STA to AP signal strength values, and STA current transmission power are directed to based on the STA that AP is obtained；Transmission power before being adjusted according to AP, and STA to the AP signal strength values and STA current transmission power, determine AP to STA signal strength values.The embodiment of the present invention is by providing a kind of detection method and device of radio link quality, so that AP to STA signal strength problem can not be determined in the prior art by solving.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of detection method and device of radio link quality.
Background technology
At present, the application of WLAN (Wireless Local Area Networks, WLAN) is increasingly
Popularization, accompanying problem is that how network design and keeper accurately hold the running situation of whole network, especially
It is signal coverage condition.WLAN transmission medium is air, when a terminal (station, STA) is successfully connected to an access
On point (Access Point, AP), it is to be understood that the link-quality of this connection, to adjust.
The realization of existing radio link quality test is：Message is sent to STA using AP, and obtains STA response messages
Signal strength values.But the signal intensity is STA to AP signal strength values, prior art can not determine AP to STA's
Signal intensity.
The content of the invention
In view of this, the present invention provides a kind of detection method and device of radio link quality, to solve in the prior art
AP to STA signal strength problem can not be determined.
The embodiments of the invention provide a kind of detection method of radio link quality, including：
According to the transmission power of the terminal STA of acquisition, the transmission power between adjustment access point AP and STA, and utilize tune
The transmission power of AP after whole sends probe messages from AP to the STA；
The response message that the probe messages are returned is directed to based on the STA that AP is obtained, the signal for obtaining STA to AP is strong
Angle value, and STA current transmission power；
Transmission power before being adjusted according to AP, and STA to the AP signal strength values and STA current transmitting work(
Rate, determines AP to STA signal strength values.
Preferably, the transmission power of the terminal STA according to acquisition, the transmitting work(between adjustment access point AP and STA
Rate, is specifically included：
According to the STA of acquisition transmission power, judge that the transmission power of the STA is less than or equal to access point AP transmitting
During power, adjustment AP transmission power is the transmission power of the STA.
Preferably, the transmission power of the terminal STA according to acquisition, the transmitting work(between adjustment access point AP and STA
Rate, is specifically included：
According to the transmission power of the terminal STA of acquisition, judge that the transmission power of the STA is more than access point AP transmitting work(
During rate, maintain AP transmission power constant, and transmission power indicative information gives the STA, indicates the STA adjustment transmitting work(
Rate, is worked using the transmission power of the AP as maximum transmission power；
The transmission power after the STA adjustment is obtained, and AP transmission power is adjusted to the hair after being adjusted with the STA
Penetrate power identical.
Preferably, after the signal strength values of determination AP to the STA, further comprise：
Recover message to STA transmit powers using AP, the power recovers message makes STA return to reception institute for instruction
The transmission power before power indicates message is stated to work.
Preferably, methods described further comprises：
Using the transmission power of the AP after adjustment multiple probe messages are sent from AP to the STA；
It is described that the response message that the probe messages are returned is directed to based on the STA that AP is obtained, obtain STA to AP letter
Number intensity level, is specifically included：
The multiple response messages returned for the multiple probe messages obtained based on AP, obtain the multiple response report
The average value of corresponding STA to the AP of text multiple signal strength values, using the average value as STA to AP signal strength values.
Preferably, AP to STA signal strength values are calculated using following equation：
RSSIA-S=P+M;
Wherein, RSSIA-SFor AP to STA signal strength values, P is the transmission power before AP is adjusted, and M is STA to the AP
Signal strength values and the STA current transmission power difference.
The embodiment of the present invention additionally provides a kind of detection means of radio link quality, including：
Adjustment unit, for the transmission power of the terminal STA according to acquisition, the transmitting between adjustment access point AP and STA
Power, and utilize the transmission power of the AP after adjustment to send probe messages from AP to the STA；
Acquiring unit, the STA for being obtained based on AP is directed to the response message that the probe messages are returned, and obtains
STA to AP signal strength values, and STA current transmission power；
Determining unit, for being adjusted according to AP before transmission power, and STA to the AP signal strength values and STA
Current transmission power, determine AP to STA signal strength values.
Preferably, the adjustment unit, specifically for the transmission power of the STA according to acquisition, judges the transmitting of the STA
When power is less than or equal to access point AP transmission power, adjustment AP transmission power is the transmission power of the STA.
Preferably, the adjustment unit, specifically for the transmission power of the terminal STA according to acquisition, judges the STA's
When transmission power is more than access point AP transmission power, maintain AP transmission power constant, and transmission power indicative information is to institute
STA is stated, the STA adjustment transmission power is indicated, is worked using the transmission power of the AP as maximum transmission power；And obtain
Transmission power after the STA adjustment, and AP transmission power is adjusted to identical with the transmission power after STA adjustment.
Preferably, described device also includes：Recovery unit, for it is determined that after AP to STA signal strength values, utilizing
AP recovers message to STA transmit powers, and the power, which recovers message, to be used to instruction and make STA return to the reception power indicating to disappear
Transmission power work before breath.
Preferably, the adjustment unit, is sent specifically for the transmission power using the AP after adjustment from AP to the STA
Multiple probe messages；
The acquiring unit, specifically for the multiple response reports returned for the multiple probe messages obtained based on AP
Text, obtains the average value of corresponding STA to the AP of the multiple response message multiple signal strength values, using the average value as
STA to AP signal strength values.
Preferably, AP to STA signal strength values are calculated using following equation：
RSSIA-S=P+M;
Wherein, RSSIA-SFor AP to STA signal strength values, P is the transmission power before AP is adjusted, and M is STA to the AP
Signal strength values and the STA current transmission power difference.
The embodiments of the invention provide a kind of detection method and device of radio link quality, according to the terminal STA of acquisition
Transmission power, the transmission power between adjustment access point AP and STA, and being sent using the transmission power of AP after adjustment to STA
Probe messages, the response message that the probe messages are returned is directed to based on the STA that AP is obtained, and obtains STA to AP signal
Intensity level, and STA current transmission power, and the transmission power before being adjusted according to AP obtains AP to STA signal intensity
Value, so that AP to STA signal strength problem can not be determined in the prior art by solving.
Brief description of the drawings
Fig. 1 is method flow diagram provided in an embodiment of the present invention；
Fig. 2 is the method for adjustment flow provided in an embodiment of the present invention for transmission power between access point AP and terminal STA
Figure；
Fig. 3 is the acquisition methods flow chart of link complete attenuation value provided in an embodiment of the present invention；
Fig. 4 is apparatus structure schematic diagram provided in an embodiment of the present invention；
Fig. 5 is hardware architecture diagram provided in an embodiment of the present invention.
Embodiment
According to prior art, for the detection of the bi-directional link quality of wireless connection, prior art is by using AP to STA
Probe messages are sent, the STA obtained according to AP is directed to the response message that the probe messages are returned, the signal for obtaining STA to AP is strong
Angle value, but prior art can not determine AP to STA signal intensity.Because wireless connection is two-way, to connection
When being adjusted, if will appreciate that the signal intensity from wireless aps to STA（Receive Signal Strength Indicator,
RSSI）, and STA to AP signal intensity, then it is just stronger to the specific aim that is adjusted of connection.
In view of the above-mentioned problems, the embodiments of the invention provide a kind of detection method of radio link quality, this method can be with
Comprise the following steps：
According to the transmission power of the terminal STA of acquisition, the transmission power between adjustment access point AP and STA, and utilize tune
The transmission power of AP after whole sends probe messages from AP to the STA；
The response message that the probe messages are returned is directed to based on the STA that AP is obtained, the signal for obtaining STA to AP is strong
Angle value, and STA current transmission power；
Transmission power before being adjusted according to AP, and STA to the AP signal strength values and STA current transmitting work(
Rate, determines AP to STA signal strength values.
The above method provided in an embodiment of the present invention, can be deployed in the network equipment as access point controller, also may be used
There is the network equipment of similar functions with other for disposing in addition to access point controller.This method is by adjusting the transmitting on AP
Power, to STA emission detection messages, according to STA to the AP got signal strength values, STA current transmission power, and
Transmission power before AP adjustment, to determine AP to STA signal strength values.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, for a kind of detection method of radio link quality provided in an embodiment of the present invention, this method can be wrapped
Include following steps：
Step 101：According to the transmission power of the terminal STA of acquisition, the transmission power between adjustment access point AP and STA,
And utilize the transmission power of the AP after adjustment to send probe messages from AP to the STA；
Wherein, wireless terminal STA includes two kinds of band power mode Power states：Awake mode Awake and park mode
Doze.When STA is in Awake states, highest transmission power operated within range of the STA at itself；When STA is in Doze states
When, STA can not intercept channel.Therefore, for the detection of radio link quality, carried out in the case where STA is in Awake states.
In real work, STA has a set of power regulation scheme of oneself, and access point (Access is received in STA
Point, AP) send probe messages when, STA can be with the probe messages of the power response after adjustment.After STA is to adjust
During transmitting power response AP, AP can get the transmission power after STA adjustment, i.e., STA herein current transmission power.
In the wireless networking of the embodiment of the present invention, AP and Radio Access Controller（Access Controller, AC）Even
Connect, AC is managed concentratedly and controlled to the AP in wireless networking, wherein, AP and AC wired connections.In the present embodiment, step
The executive agent of 101- steps 103 just refers to AC equipment, the signal for the STA that AC equipment can be received according to AP equipment, it is determined that
STA transmission power, and AP transmission power is adjusted, and may indicate that AP is worked with the transmission power after adjusting.
It will be understood by those skilled in the art that in some wireless networkings, some AP may also undertake centralized management and control
Making, or undertake part management and control function, in this case, the executive agent of step 101- steps 103 to refer to
These AP equipment, in fact, in actual networking application environment, it will usually have the network equipment with management and control function
To perform the function of step 101- steps 103, this present embodiment is not particularly limited to executive agent, as long as it can perform
The equipment of these functions.
As shown in Fig. 2 be the method for adjustment of transmission power between access point AP and terminal STA, in embodiments of the present invention,
The method of adjustment may comprise steps of：
Step 1011：During STA and AP carries out wireless connection, the association request message sent according to STA to AP
In power capability domain（Power Capability element）Middle acquisition STA transmission power S；
Step 1012：According to the STA of acquisition transmission power S, judge STA transmission power S and AP transmission power P's
Magnitude relationship, when the transmission power S for judging the STA is less than or equal to AP transmission power P, then jump procedure 1013；When
When judging that the transmission power S of the STA is more than access point AP transmission power P, then jump procedure 1014；
Step 1013：The transmission power for adjusting AP is the transmission power of the STA, is terminated；
Step 1014：Maintain AP transmission power constant, and transmission power indicative information gives the STA, indicates the STA
Transmission power is adjusted, is worked using the transmission power of the AP as maximum transmission power；
Step 1015：The transmission power after the STA adjustment is obtained, and AP transmission power is adjusted to and the STA
Transmission power after adjustment is identical.
In the step 1013 and step 1015 of the embodiment of the present invention, AP transmission power is being adjusted to STA transmitting
Power and adjustment after transmission power while, the antenna number that AP radio type and AP can also be used be adjusted to
STA wireless type with using antenna number it is identical so that STA to the AP obtained in subsequent step signal strength values with
And STA current transmission power is more accurate.
Wherein, the executive agent of step 1011- steps 1015 is AC, wherein obtaining STA transmission power, sends work(
Rate configured information is specifically what is realized by AC by AP.Because AC is the control centre of whole network, therefore, AP is with which kind of ginseng
Number, which enters row information to send, to be managed and is controlled by AC, and AP plays an average information and sent and transfer function.
For example, in step 1011, when STA is successfully connected to AP, obtain STA wireless type for 802.11b,
During any kind in 802.11g, 802.11a or 802.11ac, then in step 1013 and step 1015, by AP radio frequency class
Type is adjusted to STA wireless type.
Step 102：The response message that the probe messages are returned is directed to based on the STA that AP is obtained, STA to AP is obtained
Signal strength values, and STA current transmission power；
Step 103：Transmission power before being adjusted according to AP, and STA to the AP signal strength values and STA it is current
Transmission power, determines AP to STA signal strength values.
In embodiments of the present invention, to of the invention real by taking AP transmission power P and the STA obtained transmission power S as an example
The scheme for applying example offer is described.
In embodiments of the present invention, AC receives STA by AP and is directed to the response message that probe messages are returned, wherein, AP
The receiver at end receives the response message by antenna, and by detecting the intensity of the response message, the signal for obtaining STA to AP is strong
Angle value RSSIS-A, and obtain the STA carried in response message current transmission power S0.Wherein, STA to the AP's obtained
Signal strength values RSSIS-A, it is value of the STA signal intensity after STA to AP link attenuation.
Further, in order to obtain more accurate STA to AP signal strength values RSSIS-A, it is possible to use after adjustment
AP transmission power sends multiple probe messages from AP to the STA；
It is described that the response message that the probe messages are returned is directed to based on the STA that AP is obtained, obtain STA to AP letter
Number intensity level, is specifically included：
The multiple response messages returned for the multiple probe messages obtained based on AP, obtain the multiple response report
The average value of corresponding STA to the AP of text multiple signal strength values, using the average value as STA to AP signal strength values
RSSIS-A.So, by sending multiple probe messages, and corresponding multiple response messages are obtained, by obtaining the plurality of response
The average value of the signal intensity of message is more accurate as STA to AP signal strength values.
In embodiments of the present invention, AP to STA signal strength values are calculated using following equation：
RSSIA-S=P+M; (1)
Wherein, RSSIA-SFor AP to STA signal strength values, P is the transmission power before AP is adjusted, and M is link complete attenuation.
The link complete attenuation mainly includes path attenuation X and ground noise N.
Because P is known, it is therefore desirable to obtain link complete attenuation M value, the embodiment of the present invention is prepared by the following
The M values.
As shown in figure 3, the method for acquisition M values may comprise steps of：
Step 301：According to STA current transmission power S0, judge S0With the transmitting work(of the terminal STA obtained in step 101
Rate S relation, if judged result is S0=S, then jump procedure 302, if judged result is S0≠ S, then jump procedure 303；
Step 302：If judged result is S0=S, then RSSIS-A=RSSIA-S；
Due to AP transmitting radio frequency, consistent with STA using antenna number and link attenuation, therefore returned according to STA
Response message obtain STA to AP signal strength values RSSIS-ASignal strength values RSSI with seeing AP on STAA-SCan
It is considered identical；
According to formula (1) RSSIA-S=P+M, obtains M=RSSIA-S-P=RSSIS-A-S=RSSIS-A-S0；
Step 303：If judged result is S0≠ S, then STA used adjustment power, then according to formula (1) obtain M=
RSSIS-A-S+(S-S0)=RSSIS-A-S0.Wherein, if S0=S, then link complete attenuation M=RSSIS-A-S；But S0≠ S, therefore chain
Road complete attenuation M is in RSSIS-ADecay again on the basis of-S（S-S0）.
According to such scheme, no matter S0Whether S, link complete attenuation M=RSSI are equal toS-A-S0.That is link complete attenuation M is STA
To AP signal strength values RSSIS-AWith STA current transmission power S0Difference.
Therefore, the transmission power P before being adjusted according to AP, and STA to the AP signal strength values RSSIS-AWith STA's
Current transmission power S0, and utilization formula (1) determines AP to STA signal strength values RSSIA-S。
Further, AP to STA signal strength values RSSI is determined in method according to embodiments of the present inventionA-SAfterwards, also
The transmission power P that the transmission power for needing AC to adjust AP is returned to before adjustment.And AC is recovered using AP to STA transmit powers
Message, the power recovers the transmission power work that message is used to indicate to make STA return to before receiving the power instruction message
Make.
The method provided according to embodiments of the present invention, can control AP and STA to be detected not using different emission rates
With the signal strength values RSSI of STA to AP under emission rateS-AWith AP to STA signal strength values RSSIA-S, so as to according to acquisition
Signal strength values, wireless network is adjusted, it is ensured that each link has optimal signal transmission performance in wireless network.
As shown in table 1, be emission rate respectively under 6Mbps and 9Mbps, AP and STA radio link quality test knot
Really.
Table 1：
Wherein, TxCnt sends message number, and RxCnt is receives message number, and Retries is number of retransmissions, and RTT is hair
Deliver newspaper and the time interval of response message is received after text, TxCnt, RxCnt, Retries, RTT are in the radio chains to AP and STA
The parameter obtained during the quality test of road.Probe messages are sent to STA with emission rate 6Mbps using AP in No.0, AC,
Wherein, AC is altogether 5 to the STA probe messages numbers sent by AP, and the response message number that AC is received by AP
For 5, during probe messages are sent, system is stable, and it is 0 not occur RTT in re-transmission phenomenon, and table 1, therefore is sending
Go out the method that probe messages are shorter to the time interval for receiving response message, provide according to embodiments of the present invention, obtain STA and arrive
AP signal strength values are 55, and AP to STA signal strength values are 57.Similarly, AC utilizes AP with emission rate 9Mbps in table 1
Probe messages are sent to STA, the signal strength values for obtaining STA to AP are 56, AP to STA signal strength values are 58.
In embodiments of the present invention, according to obtained STA to AP signal strength values RSSIS-AAnd AP to STA signal
Intensity level RSSIA-P, obtain STA and AP wireless connection links bi-directional link quality.
The above method provided according to embodiments of the present invention, by adjusting the transmission power on AP, to STA emission detection reports
Text, gets STA to AP signal strength values and STA current transmission power, the transmission power before being adjusted according to AP, from
And determine AP to STA signal strength values.The bi-directional link quality of link between AP and STA in wireless network can be so obtained,
Be conducive to being adjusted wireless network, to ensure that each link there can be optimal signal transmission performance in wireless network.
Based on conceiving with method identical, the present invention also provides a kind of detection means 40 of radio link quality, is deployed in
The network equipment as access point controller, other that can also dispose in addition to access point controller have the nets of similar functions
Network equipment.As shown in figure 4, the device 40 can include：
Adjustment unit 401, for the transmission power of the terminal STA according to acquisition, the hair between adjustment access point AP and STA
Power is penetrated, and utilizes the transmission power of the AP after adjustment to send probe messages from AP to the STA；
Acquiring unit 402, the STA for being obtained based on AP is directed to the response message that the probe messages are returned, and obtains
Take STA to AP signal strength values, and STA current transmission power；
Determining unit 403, for being adjusted according to AP before transmission power, and STA to the AP signal strength values and
STA current transmission power, determines AP to STA signal strength values.
Device 40 provided in an embodiment of the present invention implements process reference can be made to the explanation of above method embodiment, herein
Repeat no more.
In said apparatus 40, the adjustment unit 401 is particularly used in the transmission power of the STA according to acquisition, judges institute
When the transmission power for stating STA is less than or equal to access point AP transmission power, adjustment AP transmission power is the transmitting of the STA
Power.
In said apparatus 40, the adjustment unit 401, specifically for the transmission power of the terminal STA according to acquisition, judges
When the transmission power of the STA is more than access point AP transmission power, maintain AP transmission power constant, and transmit power is indicated
Information gives the STA, indicates the STA adjustment transmission power, is worked using the transmission power of the AP as maximum transmission power；
And the transmission power after the STA adjustment is obtained, and AP transmission power is adjusted to the transmitting work(after being adjusted with the STA
Rate is identical.Correspondingly, the device 40 may also include：Recovery unit 404, for it is determined that after AP to STA signal strength values,
Recover message to STA transmit powers using AP, the power, which recovers message, to be used to instruction and make STA return to the reception power referring to
Show the transmission power work before message.
In said apparatus 40, the adjustment unit 401, be particularly used in using adjustment after AP transmission power from AP to
The STA sends multiple probe messages；The acquiring unit 402, is particularly used in and is visited based on what AP was obtained for the multiple
Multiple response messages of text return are observed and predicted, corresponding STA to the AP of the multiple response message multiple signal strength values are obtained
Average value, using the average value as STA to AP signal strength values.
In said apparatus 40, AP to STA signal strength values are specifically calculated using following equation：
RSSIA-S=P+M;
Wherein, RSSIA-SFor AP to STA signal strength values, P is the transmission power before AP is adjusted, and M is STA to the AP
Signal strength values and the STA current transmission power difference.
As shown in figure 5, the device corresponding with a kind of above-mentioned detection method of radio link quality that the present embodiment is provided, tool
Body can also be realized by the hardware shown in Fig. 5, specifically, the controller in Fig. 5（CPU）It is connected with memory and other
Hardware, wherein, storage has program or instruction in memory, and CPU can be performed corresponding by reading program or instruction in memory
Operation, other hardware can be specifically communication interfaces etc., can receive or send message.
Specifically, CPU can perform following operate by reading program or instruction in memory：
CPU is by reading program or instruction, for the transmission power of the terminal STA according to acquisition, adjustment access point AP with
Transmission power between STA, and utilize the transmission power of the AP after adjustment to send probe messages from AP to the STA；Based on AP
The STA obtained is directed to the response message that the probe messages are returned, acquisition STA to AP signal strength values, and STA's
Current transmission power；Transmission power before being adjusted according to AP, and STA to the AP signal strength values and STA current hair
Power is penetrated, AP to STA signal strength values are determined.
CPU, for the transmission power of the STA according to acquisition, judges the transmitting work(of the STA by reading program or instruction
When rate is less than or equal to access point AP transmission power, adjustment AP transmission power is the transmission power of the STA.
CPU, for the transmission power of the terminal STA according to acquisition, judges the hair of the STA by reading program or instruction
When penetrating transmission power of the power more than access point AP, maintain AP transmission power constant, and transmission power indicative information is to described
STA, is indicated the STA adjustment transmission power, is worked using the transmission power of the AP as maximum transmission power；And obtain institute
The transmission power after STA adjustment is stated, and AP transmission power is adjusted to identical with the transmission power after STA adjustment.
CPU is by reading program or instruction, for it is determined that after AP to STA signal strength values, being sent out using AP to STA
Power recovery message is sent, the power, which recovers message, to be used to indicate to make STA return to before the reception power instruction message
Transmission power works.
CPU sends many for the transmission power using the AP after adjustment by reading program or instruction from AP to the STA
Individual probe messages；The multiple response messages returned for the multiple probe messages obtained based on AP, obtain the multiple sound
Answer the average value of corresponding STA to the AP of message multiple signal strength values, using the average value as STA to AP signal intensity
Value.
CPU is by reading program or instruction, the signal strength values for calculating AP to STA using following equation：
RSSIA-S=P+M;
Wherein, RSSIA-SFor AP to STA signal strength values, P is the transmission power before AP is adjusted, and M is STA to the AP
Signal strength values and the STA current transmission power difference.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of protection of the invention.
Claims (12)
1. a kind of detection method of radio link quality, it is characterised in that including：
According to the transmission power of the terminal STA of acquisition, the transmission power between adjustment access point AP and STA, so that after adjustment
AP transmission power is identical with STA transmission power, and is visited using the transmission power of the AP after adjustment from AP to STA transmissions
Observe and predict text；
The response message that the probe messages are returned is directed to based on the STA that AP is obtained, STA to AP signal intensity is obtained
Value, and STA current transmission power；
Transmission power before being adjusted according to AP, and STA to the AP signal strength values and STA current transmission power, really
Determine AP to STA signal strength values.
2. the method as described in claim 1, it is characterised in that the transmission power of the terminal STA according to acquisition, adjustment connects
Transmission power between access point AP and STA, is specifically included：
According to the STA of acquisition transmission power, judge that the transmission power of the STA is less than or equal to access point AP transmission power
When, adjustment AP transmission power is the transmission power of the STA.
3. the method as described in claim 1, it is characterised in that the transmission power of the terminal STA according to acquisition, adjustment connects
Transmission power between access point AP and STA, is specifically included：
According to the transmission power of the terminal STA of acquisition, judge that the transmission power of the STA is more than access point AP transmission power
When, maintain AP transmission power constant, and transmission power indicative information gives the STA, indicates the STA adjustment transmission power,
Worked using the transmission power of the AP as maximum transmission power；
The transmission power after the STA adjustment is obtained, and AP transmission power is adjusted to the transmitting work(after being adjusted with the STA
Rate is identical.
4. method as claimed in claim 3, it is characterised in that after the signal strength values of determination AP to the STA, further
Including：
Recover message to STA transmit powers using AP, the power recovers message makes STA return to the reception work(for instruction
Rate indicates the transmission power work before message.
5. the method as described in claim 1, it is characterised in that methods described further comprises：
Using the transmission power of the AP after adjustment multiple probe messages are sent from AP to the STA；
Described to be directed to the response message that the probe messages are returned based on the STA that AP is obtained, the signal for obtaining STA to AP is strong
Angle value, is specifically included：
The multiple response messages returned for the multiple probe messages obtained based on AP, obtain the multiple response message pair
The average value of STA to the AP answered multiple signal strength values, using the average value as STA to AP signal strength values.
6. according to any described methods of claim 1-5, it is characterised in that calculate AP to STA signal using following equation
Intensity level：
RSSIA-S=P+M；
Wherein, RSSIA-SFor AP to STA signal strength values, P is the transmission power before AP is adjusted, and M is the letter of STA to the AP
Number intensity level and the difference of the current transmission power of the STA.
7. a kind of detection means of radio link quality, it is characterised in that including：
Adjustment unit, for the transmission power of the terminal STA according to acquisition, the transmission power between adjustment access point AP and STA,
So that adjustment after AP transmission power it is identical with STA transmission power, and using adjustment after AP transmission power from AP to
The STA sends probe messages；
Acquiring unit, the STA for being obtained based on AP is directed to the response message that the probe messages are returned, and obtains STA and arrives
AP signal strength values, and STA current transmission power；
Determining unit, for being adjusted according to AP before transmission power, and STA to the AP signal strength values and STA work as
Preceding transmission power, determines AP to STA signal strength values.
8. device as claimed in claim 7, it is characterised in that the adjustment unit, specifically for the hair of the STA according to acquisition
Power is penetrated, when judging that the transmission power of the STA is less than or equal to access point AP transmission power, adjustment AP transmission power is
The transmission power of the STA.
9. device as claimed in claim 7, it is characterised in that the adjustment unit, specifically for the terminal STA according to acquisition
Transmission power, judge the STA transmission power be more than access point AP transmission power when, maintain AP transmission power not
Become, and transmission power indicative information gives the STA, indicates STA adjustment transmission power, using the transmission power of the AP as
Maximum transmission power works；And obtain the transmission power after STA adjustment, and by AP transmission power be adjusted to it is described
Transmission power after STA adjustment is identical.
10. device as claimed in claim 9, it is characterised in that described device also includes：Recovery unit, for it is determined that AP
To after STA signal strength values, recover message to STA transmit powers using AP, the power recovers message to be made for instruction
STA returns to the transmission power received before the power indicates message and worked.
11. device as claimed in claim 7, it is characterised in that the adjustment unit, specifically for utilizing the AP's after adjustment
Transmission power sends multiple probe messages from AP to the STA；
The acquiring unit, specifically for the multiple response messages returned for the multiple probe messages obtained based on AP,
The average value of corresponding STA to the AP of the multiple response message multiple signal strength values is obtained, the average value is regard as STA
To AP signal strength values.
12. according to any described devices of claim 7-11, it is characterised in that calculate AP to STA letter using following equation
Number intensity level：
RSSIA-S=P+M；
Wherein, RSSIA-SFor AP to STA signal strength values, P is the transmission power before AP is adjusted, and M is the letter of STA to the AP
Number intensity level and the difference of the current transmission power of the STA.
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| CN104468058B (en) * | 2014-11-14 | 2018-07-24 | 北京囡宝科技有限公司 | A kind of method and apparatus for monitoring client signal feature |
| CN104618992A (en) * | 2015-01-15 | 2015-05-13 | 杭州华三通信技术有限公司 | AP selection method and equipment |
| CN105188113B (en) * | 2015-06-08 | 2019-10-29 | 联想(北京)有限公司 | A kind of information processing method and radio reception device |
| EP3383129B1 (en) | 2015-12-31 | 2020-05-20 | Huawei Technologies Co., Ltd. | Master-slave type network-based method and apparatus for selecting management frame antenna |
| CN107396430B (en) * | 2016-05-17 | 2021-07-02 | 中兴通讯股份有限公司 | Power adjusting method and device |
| CN110856244A (en) * | 2019-11-14 | 2020-02-28 | 杭州迪普科技股份有限公司 | AP power adjustment method and device |
| CN111010724B (en) * | 2019-12-21 | 2022-08-16 | 锐捷网络股份有限公司 | Terminal access method and device based on WLAN |
| CN114499715B (en) * | 2021-12-23 | 2024-03-19 | 云尖信息技术有限公司 | Method and device for detecting intelligent antenna array, computer equipment and storage medium |
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