CN104661245A - Method and device for acquiring wireless network data - Google Patents
Method and device for acquiring wireless network data Download PDFInfo
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- CN104661245A CN104661245A CN201510084582.0A CN201510084582A CN104661245A CN 104661245 A CN104661245 A CN 104661245A CN 201510084582 A CN201510084582 A CN 201510084582A CN 104661245 A CN104661245 A CN 104661245A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method and a device for acquiring wireless network data. The method for acquiring the wireless network data is executed by data acquisition equipment associated to an access point AP and comprises steps as follows: a data acquisition command is called; a power-saving announcement message is sent to the AP according to the data acquisition command, so that the data acquisition equipment enters a data acquisition mode; in the data acquisition mode, the data acquisition equipment keeps an associated state with the AP for WIFI scanning, wireless network signals on different channels are obtained, and wireless network data are acquired according to the wireless network signals on different channels. Wireless deployment of the data acquisition equipment is realized, the data acquisition quantity is effectively increased, the system stability is effectively improved, and the deployment cost is saved.
Description
Technical field
The embodiment of the present invention relates to data acquisition technology, particularly relates to a kind of method and the device that gather wireless network data.
Background technology
In network management and monitoring field, data acquisition is mainly caught and is analyzed data message, obtains effective network state information in real time, analyzes to facilitate and manage the operation conditions of network.
Along with popularizing of Wireless Fidelity (WirelessFidelity being called for short WIFI), data acquisition also expands to collection wireless network data.
At present, when the equipment (abbreviation data acquisition equipment) of collection WIFI wireless network data gathers wireless network data, scan each channel by WIFI and obtain wireless network data.Then, data acquisition equipment uploads to background server or controller by wired mode.This just requires must there be access in radio network interface when deployment data acquisition equipment, brings larger inconvenience to deployment.If adopt wireless mode to upload, data acquisition equipment needs to be associated with access point (Access Point is called for short AP) just can complete uploading data, and now the radio network interface of data acquisition equipment is up.But, because during uploading data, the working channel of data acquisition equipment is fixed, cause data acquisition equipment cannot complete frequency modulation scanning, therefore, the radio network interface of data acquisition equipment must be closed, namely the radio network interface of configuration data collecting device is down, cuts off and carries out frequency modulation scanning with associating of AP, and data acquisition equipment just can carry out the collection of wireless network data.Like this, data acquisition equipment uploads the data of collection again during by WIFI, need again to open radio network interface (namely configuring wireless network interface is up), associate with AP, uploaded the data of collection by AP.
Can find out, the collection of wireless network data will be realized in prior art and upload, need the radio network interface of configuration data collecting device to be repeatedly that down or up (namely interface frequently switches between down and up) comes.And configuring wireless network interface is repeatedly down or up, not only make data acquisition efficiency low, and larger for systematic influence.As large in handover delay expense, and collecting device can not keep with the connection of AP, each switching all needs to restart a complete connection procedure; In addition, radio network interface frequently switches the stability also affecting network system between down and updown and up, easily causes network system to occur abnormal.
Summary of the invention
For above-mentioned defect, the invention provides a kind of method and the device that gather wireless network data, to realize the wireless deployment of collecting device, and improve the stability of network system in data acquisition efficiency and data acquisition.
First aspect, embodiments provides a kind of method gathering wireless network data, and performed by the Wireless Fidelity data acquisition equipment being associated with access point AP, described method comprises:
Calling data acquisition;
Send power saving notice message according to described data acquisition command to described AP, enter data acquisition scheme to make described data acquisition equipment;
Under described data acquisition scheme, described data acquisition equipment keeps, with the association status of described AP, carrying out WIFI scanning, obtaining the wireless network signal on different channels, according to the wireless network signal acquisition wireless network data on described different channels.
Second aspect, the embodiment of the present invention additionally provides a kind of device gathering wireless network data, and described device is arranged in the data acquisition equipment being associated with access point AP, comprising:
Scheduler module, for calling data acquisition;
Trigger collection module, for sending power saving notice message according to described data acquisition command to described AP, enters data acquisition scheme to make described data acquisition equipment;
Scan module, under described data acquisition scheme, carries out WIFI scanning, obtains the wireless network signal on different channels; And
Data acquisition module, for according to the wireless network signal acquisition wireless network data on described different channels;
Described data acquisition equipment, under described data acquisition scheme, keeps the association status with described AP.
The method of the collection wireless network data that the embodiment of the present invention provides and device, by calling data acquisition, data acquisition equipment is made to enter data acquisition scheme, under described data acquisition scheme, described data acquisition equipment carries out WIFI scanning, gather the wireless network data of different channels, namely, data acquisition equipment remains the association status with described AP in the process gathering wireless network data, avoid the data acquisition equipment being associated with AP and frequently open and close radio network interface, solve because radio network interface frequently switches the not high problem of the data acquisition efficiency caused stability that is low and network system between down and up, achieve the wireless deployment of data acquisition equipment, effectively increase data acquisition amount, the stability of data acquisition efficiency and system, and saved lower deployment cost.
Accompanying drawing explanation
A kind of flow chart gathering the method for wireless network data that Fig. 1 provides for the embodiment of the present invention one;
In the method for the collection wireless network data that Fig. 2 a provides for the embodiment of the present invention two, the data acquisition scheme of data acquisition equipment and mode of operation cycle replace schematic diagram;
A kind of flow chart gathering the method for wireless network data that Fig. 2 b provides for the embodiment of the present invention two;
A kind of structural representation gathering the device of wireless network data that Fig. 3 provides for the embodiment of the present invention three.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not entire infrastructure.
The method of the collection wireless network data that the embodiment of the present invention provides can be performed by the device gathering wireless network data.The device of this collection wireless network data can be data acquisition equipment, also can be a part for data acquisition equipment.This device can be realized by hardware and/or software.Wherein, described data acquisition equipment is wireless local area network protocol--802.11 agreements supporting that International Power electronic engineering association (IEEE) is formulated, and for gathering the equipment of WIFI wireless network data.Data acquisition equipment can as the work station (Station is called for short STA) in WLAN (wireless local area network) by AP access also accesses network.AP provides the access service based on 802.11 agreements for STA, and AP can be the electronic equipment that mobile unit, mobile phone terminal or the wireless router etc. with focus function have radio communication function.
Embodiment one
See Fig. 1, a kind of method gathering wireless network data provided in the present embodiment one is performed by the data acquisition equipment being associated with AP, and the method specifically comprises: operation 11-operation 13.
In operation 11, calling data acquisition.
Wherein, data acquisition command can be one section of program, is set in advance in the device gathering wireless network data, is used for the device of triggering collection wireless network data to carry out data acquisition.Such as when after the device electrifying startup gathering wireless network data, directly call this data acquisition command; Or also can be when the device gathering wireless network data is provided with User Interface as button or button etc., when user's button click or after pushing button, gather the device of wireless network data according to the operation calls data acquisition command of user.
In operation 12, send power saving notice message according to described data acquisition command to described AP, enter data acquisition scheme to make described data acquisition equipment.
Wherein, data acquisition scheme make use of in MAC802.11 agreement under battery saving mode, and STA still keeps the connection with AP, and AP can not to STA transmission frame.
Particularly, for STA such as battery powered on knee or handheld PCs, in order to improve the service time of battery, MAC802.11 agreement defines battery saving mode, and in a power-save mode, STA can close network interface card usually to save electric power.During closing this section of network interface card saving electric power, STA enters battery saving mode.Be in this section of battery saving mode at STA during, MAC802.11 agreement specifies that AP can keep in frame for the STA being in battery saving mode.If there is temporary frame, AP can inform this STA in follow-up Beacon frame.MAC802.11 agreement also specifies that the STA waken up from power down mode can use power saving-poll (i.e. PS-Poll) frame to obtain these temporary frames.In the process, STA associates with AP all the time, and the configuration of its radio network interface to remain up state constant.
Therefore, the battery saving mode that the present invention utilizes MAC802.11 agreement to specify, when data acquisition equipment keeps being connected with AP, carries out data acquisition, is also data acquisition scheme.Data acquisition scheme is specifically described below.
In operation 13, under described data acquisition scheme, described data acquisition equipment keeps, with the association status of described AP, carrying out WIFI scanning, obtain the wireless network signal on different channels, according to the wireless network signal acquisition wireless network data on described different channels.
After device as gathered wireless network data sends power saving notice message, enter battery saving mode from AP side data acquisition equipment, and in fact, data acquisition equipment is in data acquisition scheme.Under this data acquisition scheme, the device gathering wireless network data can call WIFI driving and perform this WIFI scan function of unlatching, carries out frequency modulation setting, scans each receive channel, obtain the wireless network signal on each channel.
Wherein, the frequency range of described different receive channel and wireless network signal.Frequency 2.4 ~ the 2.4835GHz of conventional IEEE802.11b/g is divided into 11 or 13 channels usually.
The collection of wireless network data depending on actual conditions, namely can be resolved the wireless network signal on each receive channel as required, judges whether it is required network data, if it is receive preservation, otherwise abandon according to analysis result.
Wherein, described wireless network data can comprise data message, the administrative message of 802.11 agreements or control message.
The method of the collection wireless network data that the present embodiment provides, by calling data acquisition, and according to the AP transmission power saving notice message of data acquisition command to association, data acquisition equipment is made to be in data acquisition scheme, data acquisition equipment is made to keep carrying out WIFI scanning under the association status with described AP, obtain the wireless network signal on different channels, and according to the wireless network signal acquisition wireless network data on described different channels, avoid the data acquisition equipment being associated with AP and frequently open and close radio network interface, solve because radio network interface is large because repeatedly switching the time delay expense caused between down and up, collecting device can not keep with the connection of AP, the connection procedure that each switching one of causing is complete, and affect the problems such as network system stability, achieve the wireless deployment of data acquisition equipment, effectively increase the stability of data acquisition amount and system, and saved lower deployment cost.
Exemplary, above-mentionedly send power saving notice message according to described data acquisition command to described AP, comprising:
Send power saving-poll frame according to described data acquisition command to described AP, the value of the power management bit (Power management bit) in described power saving-poll frame is 1.
Wherein, the value of the power management bit (Power management bit) in described power saving-poll frame is 1, is used for informing that described data acquisition equipment is about to enter battery saving mode to the AP of association.
Exemplary, above-mentionedly carry out WIFI scanning, comprising:
Perform described WIFI by the driver module calling MAC layer standard MAC802.11 in wireless local area network protocol to scan.
Exemplary, perform described WIFI above by the driver module calling MAC802.11 and scan, comprising:
By the driver module of ioctl or netlink passage from MAC802.11 described in the kernel calls of described data acquisition equipment, perform described WIFI and scan.
Wherein, ioctl passage is to the function that the I/O passage of equipment manages in device driver.Ioctl function is an attribute component in file structure, and the driver of MAC802.11 provides the support to ioctl, user can use ioctl function from the driver module of MAC802.11 described in the kernel calls of described data acquisition equipment in user program, triggers frequency modulation scanning.
Wherein, netlink passage provides a kind of asynchronous communication mode, the same with other socket application programming interfaces (Application Programming Interface is called for short API), it provide a socket queue and cushion or smoothly instantaneous message peak.Also by the driver module of netlink passage from the kernel calls MAC802.11 of data acquisition equipment, frequency modulation scanning can be triggered at user's space.
Or, utilize the scan command of the radio management instrument preset at user's space, use kernel MAC802.11 to drive the frequency modulation scan method provided.
Exemplary, the method for the collection wireless network data that the embodiment of the present invention provides, after according to the wireless network signal acquisition wireless network data on described different channels, also comprises:
Call work order;
Send power saving according to described work order to described AP and cancel message, enter mode of operation to make described data acquisition equipment;
Under described mode of operation, the wireless network data of collection is uploaded to network side.
Such as, when collecting useful data or reaching the scheduled time when acquisition time, by calling work order, data acquisition scheme is made to enter mode of operation.Particularly, when meeting aforementioned condition, scheduler module calls work order, data acquisition equipment is according to described work order, AP to association sends power saving-poll frame, and the value of the power management bit in this frame is set to 0, be used for informing that notebook data collecting device is regained consciousness to the AP of association always, namely enter mode of operation.The AP of the data of collection by association uploads by data acquisition equipment.
Exemplary, above-mentioned mode of operation and described data acquisition scheme are periodically alternately.
Such as, enter mode of operation every t1 duration, enter data acquisition scheme, be equivalent to every t2 duration, each cycle is t1+t2, and wherein, t1 is the duration that data acquisition equipment is in data acquisition scheme, and t2 is the duration that data acquisition equipment is in mode of operation.
Embodiment two
The present embodiment, based on above-described embodiment, provides the another kind of method gathering wireless network data.In the present embodiment, in the data acquisition equipment of application the method, special scheduler module can be set, to carry out periodic scheduling to data acquisition command and work order, make data acquisition equipment between mode of operation and data acquisition scheme, carry out periodicity alternately.Wherein, scheduler module can be main program, data acquisition command and work order can be subprograms, as long as data acquisition equipment is in opening, scheduler module can periodic scheduling data acquisition command and work order, makes data acquisition equipment periodically be in data acquisition scheme and mode of operation.When work order performs, trigger WIFI and drive transmission to cancel power save message as power saving-poll frame, the value of the power management bit in this frame is 0.
As shown in Figure 2 a, one-period is T=T1+T2, and wherein, T1 is the duration that data acquisition equipment is in data acquisition scheme, and T2 is the duration that data acquisition equipment is in mode of operation.
See Fig. 2 b, a kind of method gathering wireless network data provided in the present embodiment two specifically comprises: operation 21-operation 23.
In operation 21, data acquisition equipment foundation associates with AP's.
The radio network interface of user setup data collecting device, through WIFI scanning foundation and the associating of described AP with authentication after, the now a certain fixed channel communication of described data acquisition equipment and described AP.
In operation 22, the scheduler module calling data acquisition in data acquisition equipment, make MAC802.11 drive the AP to association to send Ps-Poll frame, in this frame, the value of power management bit is 1.Afterwards, scheduler module calls the driver module of MAC802.11, carries out WIFI scanning, and according to scanning the wireless network signal acquisition wireless network data obtained.
In whole data acquisition, described data acquisition equipment associates with described AP all the time.
In operation 23, when reaching T1 when the duration that data acquisition equipment is in data acquisition scheme in other words when gathering duration and reaching T1, scheduler module calls work order, the driver module that MAC802.11 is called in this work order sends power saving cancellation message (value as power management bit is the power saving-poll frame of 0), trigger described data acquisition equipment and enter mode of operation, and under described mode of operation, upload the wireless network data of collection.
Described data acquisition equipment terminal is resolved the wireless network signal scanned and the process such as filtration, obtain the data that user needs, again by the wireless network belonging to AP, and distributed system (the Distribution System to be connected with AP, be called for short DS) backbone network as Ethernet, data upload user needed is to corresponding server or database.
When the duration that data acquisition equipment is in mode of operation reaches T2, data acquisition equipment again enters data acquisition scheme and namely performs aforesaid operations 22, according to the cycle shown in Fig. 2 a, operation 22 and operation 23, circulation performs, until obtain wireless network data in need, can terminate.
The method of the collection wireless network data that the present embodiment provides, data acquisition scheme and mode of operation is in by scheduler module trigger data acquisition device periodically, and wireless network data is gathered under data acquisition scheme, wireless network data is uploaded under mode of operation, all these processes, data acquisition equipment keeps being connected with AP all the time, avoid radio network interface frequently to switch between down and up, and the problem that the data acquisition efficiency caused thus stability that is low and network system is low, achieve the wireless deployment of data acquisition equipment, more effectively add the stability of data acquisition amount and system, and saved lower deployment cost.
Embodiment three
See Fig. 3, a kind of device gathering wireless network data that the present embodiment provides, is arranged in the data acquisition equipment being associated with access point AP, specifically comprises: scheduler module 31, trigger collection module 32, scan module 33 and data acquisition module 34.
Scheduler module 31, for calling data acquisition, specifically refers to the explanation in said method embodiment.
Trigger collection module 32, for sending power saving notice message according to described data acquisition command to described AP, enters data acquisition scheme to make described data acquisition equipment.Here, the function that trigger collection module 32 sends power saving notice message can be realized by the driver module of MAC802.11.Such as, the driver module of MAC802.11 sends power saving notice message under the triggering of data acquisition command.
Scan module 33, under described data acquisition scheme, carries out WIFI scanning, obtains the wireless network signal on different channels.
Data acquisition module 34 is for according to the wireless network signal acquisition wireless network data on described different channels.
Described data acquisition equipment, under described data acquisition scheme, keeps the association status with described AP.
Exemplary, described trigger collection module 32 specifically for:
Send power saving-poll frame according to described data acquisition command to described AP, the value of the power management bit in described power saving-poll frame is 1.
Described trigger collection module 32 sends function from power saving-poll frame to described AP realizes by the driver module of MAC802.11.
Exemplary, described device also comprises the driver module of MAC layer standard MAC802.11 in wireless local area network protocol;
Described scan module 33 specifically for:
Perform described WIFI by the driver module calling described MAC802.11 to scan.
Wherein, scan module 33 can be one with above-mentioned data acquisition command and the similar scan command of work order, can by scheduler module 31 management and running, also can send power saving notice message by described trigger collection module 32 and trigger and run.
Exemplary, described scan module 33 specifically for:
By the driver module of ioctl or netlink passage from MAC802.11 described in the kernel calls of described data acquisition equipment, perform described WIFI and scan.
Exemplary, described scheduler module 31 is also for calling work order;
Described device also comprises:
Work trigger module, cancelling message for sending power saving according to described work order to described AP, entering mode of operation to make described data acquisition equipment; Here, the trigger module that works can be realized by the driver module of MAC802.11; The driver module of MAC802.11 sends power saving and cancels message under the triggering of work order;
Data upload module, under described mode of operation, uploads to network side by the wireless network data that described data acquisition module 34 gathers.
Exemplary, the mode of operation of described data acquisition equipment and data acquisition scheme are periodically alternately.
The device of above-mentioned collection wireless network data can perform the method for the collection wireless network data that any embodiment of the present invention provides, and possesses and respectively operates corresponding functional module and beneficial effect with the method gathering wireless network data.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (12)
1. gather a method for wireless network data, it is characterized in that, performed by the data acquisition equipment being associated with access point AP, described method comprises:
Calling data acquisition;
Send power saving notice message according to described data acquisition command to described AP, enter data acquisition scheme to make described data acquisition equipment;
Under described data acquisition scheme, described data acquisition equipment keeps the association status with described AP, carry out Wireless Fidelity WIFI scanning, obtain the wireless network signal on different channels, according to the wireless network signal acquisition wireless network data on described different channels.
2. method according to claim 1, is characterized in that, sends power saving notice message, comprising according to described data acquisition command to described AP:
Send power saving-poll frame according to described data acquisition command to described AP, the value of the power management bit in described power saving-poll frame is 1.
3. method according to claim 1 and 2, is characterized in that, carries out WIFI scanning, comprising:
Perform described WIFI by the driver module calling MAC layer standard MAC802.11 in wireless local area network protocol to scan.
4. method according to claim 3, is characterized in that, performs described WIFI and scans, comprising by the driver module calling MAC802.11:
By the driver module of ioctl or netlink passage from MAC802.11 described in the kernel calls of described data acquisition equipment, perform described WIFI and scan.
5. method according to claim 1 and 2, after the wireless network signal acquisition wireless network data on described different channels, described method also comprises:
Call work order;
Send power saving according to described work order to described AP and cancel message, enter mode of operation to make described data acquisition equipment;
Under described mode of operation, the wireless network data of collection is uploaded to network side.
6. method according to claim 5, is characterized in that, described mode of operation and described data acquisition scheme are periodically alternately.
7. gather a device for wireless network data, it is characterized in that, described device is arranged in the data acquisition equipment being associated with access point AP, comprising:
Scheduler module, for calling data acquisition;
Trigger collection module, for sending power saving notice message according to described data acquisition command to described AP, enters data acquisition scheme to make described data acquisition equipment;
Scan module, under described data acquisition scheme, carries out Wireless Fidelity WIFI scanning, obtains the wireless network signal on different channels; And
Data acquisition module, for according to the wireless network signal acquisition wireless network data on described different channels;
Described data acquisition equipment, under described data acquisition scheme, keeps the association status with described AP.
8. device according to claim 7, is characterized in that, described trigger collection module specifically for:
Send power saving-poll frame according to described data acquisition command to described AP, the value of the power management bit in described power saving-poll frame is 1.
9. the device according to claim 7 or 8, is characterized in that, described device also comprises the driver module of MAC layer standard MAC802.11 in wireless local area network protocol;
Described scan module specifically for:
Perform described WIFI by the driver module calling described MAC802.11 to scan.
10. device according to claim 9, is characterized in that, described scan module specifically for:
By the driver module of ioctl or netlink passage from MAC802.11 described in the kernel calls of described data acquisition equipment, perform described WIFI and scan.
11. devices according to claim 7 or 8, it is characterized in that, described device also comprises:
Described scheduler module, also for calling work order;
Work trigger module, cancelling message for sending power saving according to described work order to described AP, entering mode of operation to make described data acquisition equipment;
Data upload module, under described mode of operation, uploads to network side by the wireless network data of described data collecting module collected.
12. devices according to claim 11, is characterized in that, the mode of operation of described data acquisition equipment and data acquisition scheme are periodically alternately.
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| CN201510084582.0A CN104661245A (en) | 2015-02-16 | 2015-02-16 | Method and device for acquiring wireless network data |
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