CN104468058A - Method and device for monitoring client side signal feature - Google Patents
Method and device for monitoring client side signal feature Download PDFInfo
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- CN104468058A CN104468058A CN201410647789.XA CN201410647789A CN104468058A CN 104468058 A CN104468058 A CN 104468058A CN 201410647789 A CN201410647789 A CN 201410647789A CN 104468058 A CN104468058 A CN 104468058A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
Abstract
The invention discloses a method and device for monitoring the client side signal feature. The method includes the steps that a client side address in a database is acquired, and after a detection message is sent to the client side address, the signal feature generated when a client side responds to the message is monitored, wherein the detection message is the message to which the client side can respond after the client side receives the message. By the adoption of the technical scheme, through the mode that the detection message is actively sent to the client side, and the client side sends a response message and effectively receives the response message, the probability that the message sent by the client side is captured is increased, the monitoring reliability of the client side signal feature is improved, and good use of value-added services is guaranteed.
Description
Technical field
The present invention relates to WLAN (wireless local area network) field, particularly a kind of method and apparatus monitoring client signal feature.
Background technology
WLAN (Wireless Local Area Network, WLAN (wireless local area network)) uses wireless communication technology that computer equipment is interconnected, forms the LAN that can communicate mutually with resource-sharing.WLAN has features such as building flexibly, access is convenient, support multiple terminal access, fast mobile terminal is flexible.In order to improve Consumer's Experience, each businessman provides many value-added services for WLAN, as location, traffic statistics, closely certification etc.
The deficiencies in the prior art are: the technology that these value-added services adopt all depends on the signal characteristic monitoring client, but the signal of client might not listen to, and this result also in the inefficacy of these value-added services.
Summary of the invention
The invention provides a kind of method and apparatus monitoring client signal feature, in order to solve the problem can not monitoring client signal feature existed in prior art.
Provide a kind of method monitoring client signal feature in the embodiment of the present invention, in the process monitoring signal characteristic when client sends message, perform following steps:
Obtain the client address in database;
Send probe messages to client address, described probe messages is the message that can respond after client receives.
Additionally provide a kind of device monitoring client signal feature in the embodiment of the present invention, comprising:
Acquisition module, for obtaining the client address in database;
Sending module, for sending probe messages to client address, described probe messages is the message that can respond after client receives;
Monitor module, for after sending probe messages to client address, monitor signal characteristic during client end response message.
Beneficial effect of the present invention is as follows:
In the technical scheme that the embodiment of the present invention provides, by initiatively sending the probe messages that can respond after client receives to client, make without the need to waiting for that client initiatively sends message, client is enable in fact to send message as required, this obviously improves and captures the probability that client sends message, add the reliability monitoring client signal feature, ensure that the good use of value-added service.
Accompanying drawing explanation
Fig. 1 is the use schematic flow sheet of the method monitoring client signal feature in the embodiment of the present invention;
Fig. 2 is database information process schematic diagram in the embodiment of the present invention;
Fig. 3 is instantiation workflow schematic diagram in the embodiment of the present invention;
Fig. 4 is the structural representation of the device monitoring client signal feature in the embodiment of the present invention.
Embodiment
Clearly understand to make the technical scheme in the embodiment of the present invention and advantage, below in conjunction with accompanying drawing, exemplary embodiment of the present invention is described in more detail, obviously, described embodiment is only a part of embodiment of the present invention, instead of all embodiments is exhaustive.
Inventor notices in invention process:
In order to improve Consumer's Experience, each businessman provides many value-added services for WLAN, as location, traffic statistics, closely certification etc.The technology that these value-added services adopt all depends on the signal characteristic monitoring client, when client literary composition of not transmitting messages waits packet or not at AP (WirelessAccessPoint, WAP (wireless access point)) channel of work at present is when sending out packet, the signal of client just can not monitoredly arrive, and this result also in the inefficacy of these value-added services.
In order to solve the problem, use is monitored by increasing the next special conduct of a wireless launcher by some producers, ceaselessly switches at each channel, attempts the message receiving client transmitting as much as possible, these value-added services are normally worked.But this way adds hardware cost on the one hand, also cure the symptoms, not the disease on the other hand, because client sends out the uncertainty of packet, even if AP active switching channels also may not necessarily capture client send out packet at a certain channel, or client never sends out a packet.
Based on this, the present invention proposes a kind of method monitoring client signal feature to be increased and captures the probability that client sends out packet, and these value-added service programs sending out packet based on client are accurately run.Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
Fig. 1 is the use schematic flow sheet of the method monitoring client signal feature in the embodiment of the present invention, as shown in the figure, in the process monitoring signal characteristic when client sends message, can perform following steps:
Step 101, the client address obtained in database;
Step 102, send probe messages to client address, described probe messages is the message that can respond after client receives.
In enforcement, this probe messages can be probe response (probe response) message sent by 802.11 agreements.
In concrete enforcement, 802.11 protocol groups are standards that IEEE (Institute of Electrical and ElectronicsEngineers, International Power electronic engineering association) formulates for WLAN.According to the regulation of 802.11 agreements, as long as client have received this detection response message will automatically reply an ACK (Acknowledgement confirms) message by hardware, utilize this mechanism just can have received a message sent by client.Also be, by initiatively sending out packet to client, lure that client sends out packet to AP into, the message then sent according to the client received just can listen to the signal characteristic of client, thus reach the object of collecting client state, ensure effective use of value-added service.
Adopt probe response message to be more common because of this message in 802.11 agreements in enforcement, also the most easily realize, so be employed herein probe response message; But, in theory, as long as the probe messages that client will respond after receiving is all operable, probe response message is only for instructing those skilled in the art specifically how to implement the present invention, but do not mean and only can use proberesponse message, other message can be needed to come in selection standard in conjunction with practice, even the probe messages of design specialized or the probe messages chosen in proprietary protocol in implementation process.
In enforcement, when sending probe messages, basal rate can be used to send with clean culture.
Particularly, basal rate is exactly generally the minimum speed limit under this modulating mode, is 6.5Mbps etc. if 11b be 1Mbps, 11a/g is 6Mbps, 11n.
In enforcement, when sending probe messages, can switch at each channel, send probe messages at each channel.
Such as, can ask every 1 ~ 10 second wheel, working channel is switched to other multi-channel operation 50 milliseconds, this period, send probe messages to client.
In enforcement, database can comprise one of following database or its combination: the first database, the second database, the 3rd database, the 4th database, wherein:
When first time receives the message that client sends, the client address of this client is added the first database;
If receive in multiple adjacent channel the message that client sends, and the client address of this client is in the first database, then this client address is moved into the second database, and records channel corresponding to this client address;
If send the probe messages of set point number to the client address in the second database after, do not receive the message that this client can respond, then this client address moved into the first database;
If the Frame receiving client and send, and the client address of this client is in the first database, then this client address is moved into the 3rd database, and record channel corresponding to this client address;
If send the probe messages of set point number to the client address in the 3rd database after, do not receive the message that this client can respond, then this client address moved into the first database;
If to the client address in the first database in the ergodic process of preset times, after sending the probe messages of set point number, do not receive the message that this client can respond, then this client address is moved into the 4th database, and record channel corresponding to this client address;
Sending probe messages to client address, is send probe messages to the client address selected from database according to preset strategy.
The bag related in the embodiment of the present invention, message all refer to the transmission unit of 802.11 agreements.All 802.11 messages/frame, can be divided into 3 classes: Frame (Data Frame) is responsible for carrying data between work station; Control frame (Control Frame) is responsible for the emptying of region, the obtaining and the maintenance of carrier sense of channel, and confirmations that make an affirmation in time receiving data, improve the reliability of data transmission between work station whereby; Management frames (Management Frame) is responsible for supervision, is mainly used to add or exit the transfer matters associated between wireless network and process access point.
In concrete enforcement, Fig. 2 is database information process schematic diagram in the embodiment of the present invention, and the client address in embodiment adopts MAC (Media Access Control, medium education) address, as shown in the figure:
The client address of this client, when receiving the message that a certain client sends, is recorded in the first database by step 201, first time;
Step 202, receive the message of a certain client in multiple continuous channel, by client address and multiple channel record at the second database;
Step 203, receive the Frame of a certain client, record client address and its working channel are to the 3rd database;
Particularly, in first database, the second database, the 4th database, client is all in the scope that step 203 relates to, if when receiving the Frame of client in the first database, the second database, the 4th database, its client address and working channel are recorded in the 3rd database.
Step 204, continuous when not receiving the message of a certain client 3 times, the client address of this client and working channel are shifted out from other databases, and moves into the first database;
Particularly, in the second database and the 3rd database, client is not when being received for continuous three times, and its client address and working channel are moved to the first database.
If step 205 continuous 3 takes turns traversal, all channels all do not receive the message of a certain client, then record this client address and lost contact round to the 4th database, wherein lost contact round is 1;
Step 206, when again receiving the non-data message of a certain client, the client address of the client in the 4th database and working channel are moved to the first database;
Step 207, every many one takes turns the message confiscating a certain client, and the lost contact round recorded in the 4th database adds 1.
In enforcement, send probe messages to the client address selected from database according to preset strategy, comprising:
The first database, the second database, the 3rd database, the 4th database is traveled through successively at each channel;
In each database, select should the client address of channel;
Probe messages is sent to this client address.
In enforcement, after all sending probe messages to the client address selected on each channel, comprised further:
Client address more in new database and/or the channel information of its correspondence.
According to predetermined period, send probe messages to the client address selected from database according to preset strategy.
In enforcement, during the channel of the client address in more new database and/or its correspondence, comprising:
If to the client address in the first database in the cycle experienced of preset times, after sending probe messages, do not receive the message that this client can respond, then this client address is moved into the 4th database, and record channel corresponding to this client address;
If after sending probe messages to the client address in the 4th database, receive the message that this client can respond, then this client address moved into the first database.
In enforcement, can further include:
After determining to send probe messages in the 4th database, do not receive the client address of response message, and determine the periodicity that sent;
The interval sending probe messages to this client address is determined according to the periodicity sent;
Probe messages is sent to this client address by this interval.
In above-mentioned implementation process, in order to reduce the holding time at inoperative channel, number of retransmissions can be set to 1;
In concrete enforcement, according to 802.11 agreements, because wireless transmission may packet loss, in order to ensure transmission quality, Frame has hardware retransmission mechanism, hardware can wait for after sending a Frame that the ACK that beams back opposite end (correspondingly, the opposing party can reply transmit leg ACK after receiving a Frame), again send after time-out, in general number of retransmissions is 10, if so can not receive ACK always, send out a bag and will take the more time.
In addition, in wireless transmissions, receive and dispatch two sides to need could communicate at same channel, AP is when serving, steady operation is at a certain allocated channel, need AP to be switched to other multi-channel operation once in a while in the embodiment of the present invention, so switching time can not be oversize, otherwise the client being associated in this AP can be caused to go offline.Therefore, in order to reduce the holding time at inoperative channel, number of retransmissions can be set to 1.
In above-mentioned implementation process, for the information processing in database, if the client in the first database receives in multiple adjacent channel, then this client is shifted out former database, join doubtful channel database (being also the second database), record MAC and channel set simultaneously, when being only switched to respective channels, just this client is given out a contract for a project; If continuous 3 times do not receive message, then recover this client to the first database;
If have received the Frame of a certain client, then illustrate that this client associate has arrived a certain AP, then this client is shifted out former database, join known channel database (being also the 3rd database), record MAC and channel simultaneously, when being only switched to respective channels, just this client is given out a contract for a project; If continuous 3 times do not receive message, then recover this client to the first database;
When continuous 3 take turns the message that traversal does not receive a certain client, then this client is shifted out the first database, join lost contact database (being also the 4th database), record MAC and channel and lost contact round, often travel through once all channels and do not receive message, then lost contact round is added one, interval of giving out a contract for a project doubles, and remains unchanged after being increased to 64 times; Again after receiving the message of this client, then this client is recovered to the first database.
In enforcement, when comprising multiple AP in deployed environment, based on single AP all functions, in the embodiment of the present invention, additionally provide the scheme of many AP collaborative work, wherein:
1) defining adjacent AP is the AP that can hear that this AP gives out a contract for a project;
2) periodic synchronous first database, the second database, the 3rd database, the 4th database;
3) when the 3rd database of a certain AP has newly-increased, its adjacent AP of real-time informing;
4) when a certain AP receives new client, its adjacent AP of real-time informing;
Then in concrete enforcement, can further include:
Client address information is sent to adjacent AP;
And/or,
Receive client address information, and according to client address information updating database.
In enforcement, when sending probe messages to client address, one of as follows or its combination send:
If client address is the client address selected from the first database, all channels send probe messages;
If client address is the client address selected from the second database, required channel sends probe messages;
If client address is the client address selected from the 3rd database, send probe messages on a designated channel.
In concrete enforcement, each database will traverse, and this is to raise the efficiency.Such as, data in first database, all can detect (time spent is maximum) on all channels, the data in the second database can detect on several suspection channel, and the meeting in the 3rd database is at certain allocated channel detection (most effective).
Be described below in conjunction with an instantiation.
Fig. 3 is instantiation workflow schematic diagram in the embodiment of the present invention, as shown in the figure, can comprise step:
Step 301, from first channel of radio frequency support, travel through all client address in the first database;
Step 302, travel through all client address meeting channel in the second database;
All client address meeting channel in step 303, traversal the 3rd database;
All client address meeting a packet interval in step 304, traversal the 4th database;
Step 305, judge that whether this channel is last channel that radio frequency is supported;
If not last channel that radio frequency is supported, then perform step 306, wait for next sweep spacing, be switched to next channel, and then re-execute step 301 to step 305;
If this channel is last channel that radio frequency is supported, then perform step 307, more new database;
And then perform step 308, wait for next sweep spacing, be switched to first channel.And then re-execute step 301 to step 305.
Particularly, when traveling through the first database, the second database, the 3rd database, the 4th database, first database, the second database, the 3rd database are front, the sequence requirement traveled through can not had, but, can by the 4th database in the end in concrete enforcement, if this is because client address in the 4th database may return to the first database after receiving response, be placed on and finally carry out traversal and can avoid in very short time, again repeat detection.
Visible, the embodiment of the present invention is by initiatively initiatively sending out packet to client, luring that client sends out packet to AP into, thus reaches the object of collecting client state.
Based on same inventive concept, a kind of device monitoring client signal feature is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to this device is similar to a kind of method monitoring client signal feature, therefore the enforcement of this device see the enforcement of method, can repeat part and repeats no more.
Fig. 4 is the structural representation of the device monitoring client signal feature in the embodiment of the present invention, as shown in the figure, can comprise:
Acquisition module 401, for obtaining the client address in database;
Sending module 402, for sending probe messages to client address, described probe messages is the message that can respond after client receives;
Monitor module 403, for after sending probe messages to client address, monitor signal characteristic during client end response message.
In enforcement, monitor module 403 and can also be used for sending proberesponse message by 802.11 agreements to client address.
In enforcement, monitor module 403 and can also be used for using basal rate to send probe messages to client address with clean culture.
In enforcement, monitor module 403 and can also be used for, when sending probe messages to client address, switching at each channel, sending probe messages at each channel.
In enforcement, the database related in the embodiment of the present invention comprises one of following database or its combination: the first database, the second database, the 3rd database, the 4th database;
Can further include:
Database processing module 404, the channel information for the client address in process database as follows and/or its correspondence:
When first time receives the message that client sends, the client address of this client is added the first database;
If receive in multiple adjacent channel the message that client sends, and the client address of this client is in the first database, then this client address is moved into the second database, and records channel corresponding to this client address;
If send the probe messages of set point number to the client address in the second database after, do not receive the message that this client can respond, then this client address moved into the first database;
If the Frame receiving client and send, and the client address of this client is in the first database, then this client address is moved into the 3rd database, and record channel corresponding to this client address;
If send the probe messages of set point number to the client address in the 3rd database after, do not receive the message that this client can respond, then this client address moved into the first database;
If to the client address in the first database in the ergodic process of preset times, after sending the probe messages of set point number, do not receive the message that this client can respond, then this client address is moved into the 4th database, and record channel corresponding to this client address;
Sending module 402 can also be used for sending probe messages to the client address selected from database according to preset strategy.
In enforcement, in the embodiment of the present invention, acquisition module 401 can also be used for when the client address selected from database according to preset strategy, travels through the first database, the second database, the 3rd database, the 4th database successively at each channel; In each database, select should the client address of channel;
Sending module 402 can also be used for sending probe messages to this client address.
In enforcement, after database processing module 404 can also be further used for all sending probe messages to the client address selected on each channel, the client address more in new database and/or the channel information of its correspondence.
In enforcement, sending module 402 can also be further used for according to predetermined period, sends probe messages to the client address selected from database according to preset strategy.
In enforcement, when database processing module 404 can also be further used for the channel of client address in more new database and/or its correspondence, if to the client address in the first database in the cycle experienced of preset times, after sending probe messages, do not receive the message that this client can respond, then this client address is moved into the 4th database, and record channel corresponding to this client address; If after sending probe messages to the client address in the 4th database, receive the message that this client can respond, then this client address moved into the first database.
In enforcement, database processing module 404 does not receive the client address of response message after can also being used for determining to send probe messages in the 4th database, and determines the periodicity that sent; The interval sending probe messages to this client address is determined according to the periodicity sent;
Sending module 402 can also be used for sending probe messages by this interval to this client address.
In enforcement, can further include:
Data update module 405, for sending client address information to adjacent AP; And/or, receive the client address information that adjacent AP sends;
Database processing module 404 can also be used for the client address information updating database according to receiving.
In enforcement, sending module 402 can also be further used for when sending probe messages to client address, one of as follows or its combination send:
If client address is the client address selected from the first database, all channels send probe messages;
If client address is the client address selected from the second database, required channel sends probe messages;
If client address is the client address selected from the 3rd database, send probe messages on a designated channel.
The technical scheme provided in the embodiment of the present invention is provided, respectively the test that packet interval sent out by mobile phone is carried out respectively to Android system mobile phone and apple IOS system mobile phone, spread its tail and carried out the test of a packet interval mainly for pass screen holding state, not associated spread its tail state and association at inoperative channel status, the mobile phone brand wherein related to contains home-made cellphone brand, Japan and Korea S's brand and American-European brand.Test result is as shown in the table is:
Meizu MX2
iPhone 3G
Millet 3
Huawei
HTC
Cruel group
Samsung S8182
From the result of test, under the screen holding state of pass, only have Mobile phone frequently to send out packet, it is little that packet all sent out by other mobile phones, observes to have no for 5 minutes and send out packet; Under not associated state of spreading its tail, all mobile phones frequently can send out packet, and packet number sent out by mobile phone and interval time does not stablize constant; Spread its tail under inoperative channel status in association, different for each money mobile phone performance, mobile phone can be received time indivedual and send out packet, send out packet situation on the whole unsatisfactory.As can be seen from above-mentioned test result, the mode of passive listening is difficult to effectively ensure the true(-)running of related software, the accurate use of value-added service.
And adopt the mode of initiatively intercepting provided in the embodiment of the present invention can guarantee no matter which kind of mobile phone, no matter spread its tail or close screen, no matter whether associate the message that can receive any client, and then effectively monitor the signal characteristic of client.
Utilize the message (single AP) receiving client in the embodiment of the present invention, analyze its radio signal characteristics (intensity, phase place, time delay etc.) and carry out certification, closely authentication function can be realized.If do not have message cannot normally work equally, so the active trigger mechanism of the technical scheme utilizing the embodiment of the present invention to provide can realize the optimization of closely authentication function.
Single AP can be utilized in the embodiment of the present invention to work alone to realize monitoring client signal feature, in addition, when comprising multiple AP in deployed environment, based on single AP all functions, many AP collaborative work can be realized.When the 3rd database of a certain AP have newly-increased or receive new client time, all its adjacent AP of real-time informing.
The many AP collaborative work provided in the embodiment of the present invention can be applied in the scene such as exhibition navigation system and the flow analysis of stand, market.Particularly, exhibition navigation system and the flow analysis of stand, market similar, all arrange multiple AP in one scenario, between some AP, coverage has overlap, and can collaborative work, by multiple AP at one time in receive same client message and make computing, draw client location according to a certain location algorithm, how long can also count for flow analysis the time stopped in a certain position has.
These two kinds of methods are all based on there being multiple AP can listen to same client at similar time, just can complete the location to it.
Method is in the past all passive listening, and due to various client, to send out packet mechanism all different, and particularly mobile phone is considered due to economize on electricity, is difficult to ensure that navigation system can receive enough data; And what adopt in the embodiment of the present invention is initiatively trigger mechanism, client, because the reason of agreement must respond, makes former navigation system can receive enough bags to complete computing, improves precision.
For convenience of description, each several part of the above device is divided into various module or unit to describe respectively with function.Certainly, the function of each module or unit can be realized in same or multiple software or hardware when implementing of the present invention.
Adopt technical scheme provided by the invention, make client send response message by initiatively sending probe messages to client and effectively receive the mode of this response message, improve and capture the probability that client sends message, add the reliability monitoring client signal feature, ensure that the good use of value-added service.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (24)
1. monitor a method for client signal feature, it is characterized in that, in the process monitoring signal characteristic when client sends message, perform following steps:
Obtain the client address in database;
Send probe messages to client address, described probe messages is the message that can respond after client receives.
2. the method for claim 1, is characterized in that, described probe messages is the probe response probe response message sent by 802.11 agreements.
3. the method for claim 1, is characterized in that, when sending probe messages, uses basal rate to send with clean culture.
4. the method for claim 1, is characterized in that, when sending probe messages, switches, send probe messages at each channel at each channel.
5. the method as described in as arbitrary in Claims 1-4, is characterized in that, database comprises one of following database or its combination: the first database, the second database, the 3rd database, the 4th database, wherein:
When first time receives the message that client sends, the client address of this client is added the first database;
If receive in multiple adjacent channel the message that client sends, and the client address of this client is in the first database, then this client address is moved into the second database, and records channel corresponding to this client address;
If send the probe messages of set point number to the client address in the second database after, do not receive the message that this client can respond, then this client address moved into the first database;
If the Frame receiving client and send, and the client address of this client is in the first database, then this client address is moved into the 3rd database, and record channel corresponding to this client address;
If send the probe messages of set point number to the client address in the 3rd database after, do not receive the message that this client can respond, then this client address moved into the first database;
If to the client address in the first database in the ergodic process of preset times, after sending the probe messages of set point number, do not receive the message that this client can respond, then this client address is moved into the 4th database, and record channel corresponding to this client address;
Sending probe messages to client address, is send probe messages to the client address selected from database according to preset strategy.
6. method as claimed in claim 5, is characterized in that, sends probe messages, comprising to the client address selected from database according to preset strategy:
The first database, the second database, the 3rd database, the 4th database is traveled through successively at each channel;
In each database, select should the client address of channel;
Probe messages is sent to this client address.
7. method as claimed in claim 6, is characterized in that, after all sending probe messages to the client address selected on each channel, comprise further:
Client address more in new database and/or the channel information of its correspondence.
8. method as claimed in claims 6 or 7, is characterized in that, according to predetermined period, sends probe messages to the client address selected from database according to preset strategy.
9. method as claimed in claim 7, is characterized in that, during the channel of the client address in more new database and/or its correspondence, comprising:
If to the client address in the first database in the cycle experienced of preset times, after sending probe messages, do not receive the message that this client can respond, then this client address is moved into the 4th database, and record channel corresponding to this client address;
If after sending probe messages to the client address in the 4th database, receive the message that this client can respond, then this client address moved into the first database.
10. the method as described in as arbitrary in claim 5 to 9, is characterized in that, comprise further:
After determining to send probe messages in the 4th database, do not receive the client address of response message, and determine the periodicity that sent;
The interval sending probe messages to this client address is determined according to the periodicity sent;
Probe messages is sent to this client address by this interval.
11. as arbitrary in claim 1 to 10 as described in method, it is characterized in that, comprise further:
Client address information is sent to adjacent AP;
And/or,
Receive the client address information that adjacent AP sends, and according to client address information updating database.
12. as arbitrary in claim 5 to 11 as described in method, it is characterized in that, when sending probe messages to client address, one of as follows or its combination send:
If client address is the client address selected from the first database, all channels send probe messages;
If client address is the client address selected from the second database, required channel sends probe messages;
If client address is the client address selected from the 3rd database, send probe messages on a designated channel.
13. 1 kinds of devices monitoring client signal feature, is characterized in that, comprising:
Acquisition module, for obtaining the client address in database;
Sending module, for sending probe messages to client address, described probe messages is the message that can respond after client receives;
Monitor module, for after sending probe messages to client address, monitor signal characteristic during client end response message.
14. devices as claimed in claim 13, is characterized in that, described monitoring module is further used for sending probe response message by 802.11 agreements to client address.
15. devices as claimed in claim 13, is characterized in that, described monitoring module is further used for using basal rate to send probe messages to client address with clean culture.
16. devices as claimed in claim 13, is characterized in that, described monitoring module is further used for, when sending probe messages to client address, switching, send probe messages at each channel at each channel.
17. as arbitrary in claim 13 to 16 as described in device, it is characterized in that, database comprise one of following database or its combination: the first database, the second database, the 3rd database, the 4th database;
Comprise further:
Database processing module, the channel information for the client address in process database as follows and/or its correspondence:
When first time receives the message that client sends, the client address of this client is added the first database;
If receive in multiple adjacent channel the message that client sends, and the client address of this client is in the first database, then this client address is moved into the second database, and records channel corresponding to this client address;
If send the probe messages of set point number to the client address in the second database after, do not receive the message that this client can respond, then this client address moved into the first database;
If the Frame receiving client and send, and the client address of this client is in the first database, then this client address is moved into the 3rd database, and record channel corresponding to this client address;
If send the probe messages of set point number to the client address in the 3rd database after, do not receive the message that this client can respond, then this client address moved into the first database;
If to the client address in the first database in the ergodic process of preset times, after sending the probe messages of set point number, do not receive the message that this client can respond, then this client address is moved into the 4th database, and record channel corresponding to this client address;
Sending module is further used for sending probe messages to the client address selected from database according to preset strategy.
18. devices as claimed in claim 17, is characterized in that,
Acquisition module is further used for when the client address selected from database according to preset strategy, travels through the first database, the second database, the 3rd database, the 4th database successively at each channel; In each database, select should the client address of channel;
Sending module is further used for sending probe messages to this client address.
19. devices as claimed in claim 18, is characterized in that, after database processing module is further used for all sending probe messages to the client address selected on each channel, and the client address more in new database and/or the channel information of its correspondence.
20. devices as described in claim 18 or 19, it is characterized in that, sending module is further used for according to predetermined period, sends probe messages to the client address selected from database according to preset strategy.
21. devices as claimed in claim 19, it is characterized in that, when database processing module is further used for the channel of client address in more new database and/or its correspondence, if to the client address in the first database in the cycle experienced of preset times, after sending probe messages, do not receive the message that this client can respond, then this client address is moved into the 4th database, and record channel corresponding to this client address; If after sending probe messages to the client address in the 4th database, receive the message that this client can respond, then this client address moved into the first database.
22. as arbitrary in claim 17 to 21 as described in device, it is characterized in that, database processing module does not receive the client address of response message after being further used for determining to send probe messages in the 4th database, and determines the periodicity that sent; The interval sending probe messages to this client address is determined according to the periodicity sent;
Sending module is further used for sending probe messages by this interval to this client address.
23. as arbitrary in claim 13 to 22 as described in device, it is characterized in that, comprise further:
Data update module, for sending client address information to adjacent AP; And/or, receive the client address information that adjacent AP sends;
Database processing module is further used for the client address information updating database according to receiving.
24. as arbitrary in claim 17 to 23 as described in device, it is characterized in that, sending module is further used for when sending probe messages to client address, one of as follows or its combination send:
If client address is the client address selected from the first database, all channels send probe messages;
If client address is the client address selected from the second database, required channel sends probe messages;
If client address is the client address selected from the 3rd database, send probe messages on a designated channel.
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