CN111181668B

CN111181668B - Information acquisition method and device

Info

Publication number: CN111181668B
Application number: CN201910332355.3A
Authority: CN
Inventors: 李华
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: Hangzhou H3C Technologies Co Ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2021-06-18
Anticipated expiration: 2039-04-24
Also published as: CN111181668A; WO2020216222A1

Abstract

The application provides an information acquisition method and device, relates to the technical field of communication, and aims to solve the problem that an AP cannot record attribute information of a terminal. The scheme of this application includes: and acquiring an area SSID list, wherein the area SSID list comprises SSIDs of the WLAN connected with the terminal, and the terminal is positioned in the designated area. Then, in the coverage area of the AP, a plurality of beacon frames are continuously broadcast, each beacon frame includes one SSID in the area SSID list, and the receiving terminal receives a probe request sent by the terminal according to the beacon frame, where the probe request includes attribute information of the terminal.

Description

Information acquisition method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information obtaining method and apparatus.

Background

At present, a network access service can be provided for a terminal based on a Wireless Local Area Network (WLAN), and a recording function for the terminal can also be realized through the WLAN, where the recording function for the terminal is referred to as a Wireless probe function.

The method for implementing the wireless probe function includes that an Access Point (AP) continuously scans a signal frame sent by a terminal, and obtains information such as a Media Access Control (MAC) Address of the terminal according to the scanned signal frame.

However, in practical applications, there may be a portion of terminals that externally transmit few signal frames, so that the attribute information of the portion of terminals cannot be recorded by the AP. For example, for a terminal that does not access a wireless network, most of the time, it is in a power-saving sleep state, which only periodically sends a small number of probe requests to scan for the presence of accessible wireless networks. The AP may not be able to scan for probe requests it sends for the aforementioned terminals.

In addition, for some terminals using a specific system, the terminals have the function of hiding the real MAC address, and the externally sent probe request does not carry the real MAC address of the terminal. Even if the AP scans the probe request of the terminal, the AP cannot acquire the real MAC address of the terminal, and thus cannot record the attribute information of the terminal.

Disclosure of Invention

In view of this, the present application provides an information obtaining method and apparatus to solve the problem that an AP cannot record attribute information of a terminal. The specific technical scheme is as follows:

in a first aspect, the present application provides an information acquisition method, which is applied to an access point AP, and includes:

acquiring a regional Service Set Identifier (SSID) list, wherein the regional SSID list comprises SSIDs of a Wireless Local Area Network (WLAN) connected with a terminal, and the terminal is positioned in a designated region;

continuously broadcasting a plurality of beacon frames in the coverage area of the AP, wherein each beacon frame comprises one SSID in an area SSID list;

and receiving a detection request sent by the terminal according to the SSID included in the beacon frame, wherein the detection request comprises the attribute information of the terminal.

In one possible implementation, continuously broadcasting a plurality of beacon frames within the coverage area of the AP includes:

selecting a first frequency band according to the inherent WLAN frequency band, wherein the first frequency band is 2.4GHz and comprises a plurality of working channels;

detecting whether the air interface occupancy rate of any working channel in the plurality of working channels is smaller than a first preset threshold value;

if the air interface occupancy rate of the working channel is less than a first preset threshold value, broadcasting a beacon frame at a first frequency and a first rate through the working channel, wherein the first frequency is lower than a preset reference frequency, and the first rate is higher than a preset reference rate;

the method for receiving the detection request sent by the terminal according to the SSID included in the beacon frame comprises the following steps:

and receiving a detection request sent by the terminal through a working channel within the duration of a first preset period, wherein the detection request comprises attribute information of the terminal, and the attribute information comprises an MAC address of the terminal.

In one possible implementation, the method further includes:

when the time length exceeds the first preset period, repeatedly detecting whether the air interface occupancy rate of any working channel in the plurality of working channels is smaller than a first preset threshold value;

and the number of the first and second groups,

if the air interface occupancy rate of the working channel is less than the first preset threshold, the procedure of broadcasting the beacon frame at the first frequency and the first speed through the working channel is completed until the air interface occupancy rate of each working channel in the plurality of working channels is detected, and the broadcasting of the beacon frame through each working channel less than the first preset threshold is completed.

selecting a second frequency band according to the inherent WLAN frequency band, wherein the second frequency band is a 5GHz frequency band and comprises a plurality of working channels;

broadcasting beacon frames at a second frequency and a second rate through any one of a plurality of working channels, wherein the second frequency is higher than a preset reference frequency, and the second rate is lower than a preset reference rate;

and receiving a detection request sent by the terminal through the working channel within the duration of a second preset period, wherein the detection request comprises attribute information of the terminal, and the attribute information comprises an MAC address of the terminal.

In one possible implementation, the method further includes:

and when the duration of the second preset period is exceeded, repeatedly executing the process of broadcasting the beacon frame at the second frequency and the second speed through any one working channel in the plurality of working channels until the beacon frame is broadcast through each working channel in the plurality of working channels.

In a second aspect, the present application provides an information acquisition apparatus, which is applied to an access point AP, and includes:

the system comprises an acquisition module, a Service Set Identification (SSID) acquisition module and a Service Set Identification (SSID) acquisition module, wherein the SSID acquisition module is used for acquiring an SSID list of a regional service set, the regional SSID list comprises SSIDs of a Wireless Local Area Network (WLAN) connected with a terminal, and the terminal is positioned in a designated region;

the broadcast module is used for continuously broadcasting a plurality of beacon frames in the coverage area of the AP, wherein each beacon frame comprises one SSID in the area SSID list;

and the receiving module is used for receiving a detection request sent by the terminal according to the SSID included in the beacon frame, wherein the detection request includes the attribute information of the terminal.

In a possible implementation manner, the broadcasting module is specifically configured to:

the receiving module is specifically configured to receive, within a duration of a first preset period, a probe request sent by a terminal through a working channel, where the probe request includes attribute information of the terminal, and the attribute information includes an MAC address of the terminal.

In one possible implementation, the broadcasting module is further configured to:

and the number of the first and second groups,

and the receiving module is further configured to receive, within a duration of a second preset period, a probe request sent by the terminal through the working channel, where the probe request includes attribute information of the terminal, and the attribute information includes an MAC address of the terminal.

In a third aspect, the present application provides an AP, comprising: a processor and a machine-readable storage medium storing machine-executable instructions executable by the processor, the processor being caused by the machine-executable instructions to: the information acquisition method described in the first aspect is implemented.

In a fourth aspect, the present application further provides a computer-readable storage medium, in which a computer program is stored, and the computer program, when executed by a processor, implements the information obtaining method described in the first aspect.

In a fifth aspect, the present application further provides a computer program product containing instructions, which when run on a computer, causes the computer to perform the information acquisition method described in the first aspect above.

Therefore, by using the information acquisition method and device provided by the application, after the AP acquires the regional SSID list, the AP continuously broadcasts a plurality of beacon frames within the coverage area of the regional SSID list. And the terminal sends a detection request to the AP according to the SSID included in the beacon frame. And the AP acquires the attribute information of the terminal according to the received detection request. Since the SSID included in the beacon frame represents the WLAN to which the terminal has accessed, the terminal directly sends a probe request including the attribute information to the AP after receiving the beacon frame, so that the AP obtains the attribute information of the terminal.

Of course, not all advantages described above need to be achieved at the same time in the practice of any one product or method of the present application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an architecture diagram of a WLAN networking according to an embodiment of the present application;

fig. 2 is a flowchart of an information obtaining method according to an embodiment of the present application;

fig. 3 is a flowchart of another information acquisition method provided in the embodiment of the present application;

fig. 4 is a flowchart of another information acquisition method provided in the embodiment of the present application;

fig. 5 is a flowchart of another information obtaining method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an information acquisition apparatus according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an AP according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to solve the problem that an AP cannot efficiently detect and record attribute information of a terminal, an embodiment of the present application provides an information acquisition method, where the method is applied to an AP, and the AP is in a WLAN networking, as shown in fig. 1, the WLAN networking includes an Access Controller (AC), multiple APs accessing the AC, and a terminal in an AP coverage area. In this embodiment, the AP may be a probe AP, and the probe AP is an AP having a probe function.

It is to be understood that fig. 1 shows 6 APs accessing the AC and three terminals accessing one of the APs, and in an actual implementation, the number of each device in the WLAN networking is not limited thereto.

The AP may obtain the regional SSID list, and continuously broadcast a plurality of beacon (beacon) frames according to the regional SSID list, where each beacon frame includes one SSID in the regional SSID list.

The area SSID list includes Service Set Identifiers (SSIDs) of WLANs to which the terminal is connected, and the terminal is in a designated area.

Wherein the designated area may be embodied as a physical area or a public place, by way of example and not limitation. Building structures such as supermarkets, shopping malls, restaurants and the like are arranged in the physical area or the public place. If the terminal accesses the WLAN of the supermarket, the market and the restaurant, the third-party data provider can acquire the SSID of the WLAN which the terminal accesses, and an area SSID list is formed. Or manually acquiring SSIDs of the WLANs accessed by the terminal to form an area SSID list.

The AP may acquire the regional SSID list in the following three ways.

In the first mode, the AP receives a regional SSID list provided by a third-party data provider. It will be appreciated that the AP periodically maintains a list of regional SSIDs.

And in the second mode, a manually acquired area SSID list is configured in the AP in advance, so that the AP can acquire the area SSID list stored by the AP.

And in the third mode, the AP receives the area SSID list sent by the AC.

Specifically, the AC acquires the area SSID list, and sends the area SSID list to the AP accessing the AC. The list of regional SSIDs obtained by the AC is provided by a third party data provider or manually collected and configured in the AC. It will be appreciated that the AC maintains the list of regional SSIDs periodically.

Based on the WLAN networking shown in fig. 1, an embodiment of the present application provides an information acquisition method, where the method is executed by an AP, and as shown in fig. 2, the method includes:

s201, acquiring an area SSID list.

Specifically, the area SSID list includes SSIDs of WLANs to which the terminal is connected, the terminal being within the specified area.

S202, continuously broadcasting a plurality of beacon frames in the coverage area of the AP, wherein each beacon frame comprises one SSID in the area SSID list.

Specifically, after acquiring the area SSID list, the AP generates a plurality of beacon frames. In the embodiment of the present invention, each beacon frame includes one SSID in the area SSID list.

After the AP generates a plurality of beacon frames, the AP continuously broadcasts the plurality of beacon frames in a coverage area, which may also be referred to as a radio frequency range.

S203, receiving a detection request sent by the terminal according to the SSID included in the beacon frame, wherein the detection request includes the attribute information of the terminal.

Specifically, after receiving the beacon frame, the terminal acquires the SSID from the beacon frame. If the SSID is characterized by the WLAN that the terminal has accessed, the terminal sends a Probe Request (Probe Request) to the AP, where the Probe Request includes the SSID and attribute information of the terminal.

The attribute information of the terminal further includes, by way of example and not limitation, a signal strength of a probe request received by the AP, and a time when the probe request is received by the AP.

Therefore, by adopting the method provided by the application, after the AP acquires the regional SSID list, a plurality of beacon frames are continuously broadcast within the coverage area of the AP, and each beacon frame includes one SSID in the regional SSID list. And the terminal sends a detection request to the AP according to the SSID included in the beacon frame. And the AP acquires the attribute information of the terminal according to the received detection request. Since the SSID included in the beacon frame represents the WLAN to which the terminal has accessed, the terminal directly sends a probe request including the attribute information to the AP after receiving the beacon frame, so that the AP obtains the attribute information of the terminal.

In addition, when the terminal finds that the accessible WLAN exists through the beacon frame, the terminal transmits a probe request to the AP, the probe request including a real MAC address of the terminal. Therefore, the attribute information acquired by the AP has a reference value.

It can be understood that, in the above embodiment, after the AP acquires the regional SSID list, the AP continuously broadcasts a plurality of beacon frames, where each beacon frame includes one SSID in the regional SSID list, that is, one beacon frame is broadcast for each SSID in the regional SSID list.

In addition, in the related art, the AP transmits beacon frames with a high frequency. For example, one beacon frame is sent every 100 milliseconds, and the AP sends the beacon frame at a low rate, which occupies a long air interface time. The AP sends a large number of beacon frames at high frequency and low rate to occupy more transmission resources, which may affect the wireless access function provided by the AP for the terminal. It will be appreciated that the underlying radio access functionality is more important than the value added service functionality of the AP. Therefore, the embodiment of the application optimizes the probe function on the basis of not influencing the basic wireless access function, so that the AP can efficiently detect and record the attribute information of the terminal.

According to the embodiment of the application, different working strategies can be appointed to different WLAN frequency bands, so that the wireless access function and the probe function are considered. The WLAN frequency band may also be referred to as an AP operating frequency band, and there are two inherent WLAN frequency bands, i.e., a first frequency band and a second frequency band.

The first frequency band is a 2.4GHz frequency band, which is called a low frequency band, the first frequency band is relatively crowded, the occupancy rate of an air interface is high, more wireless access services are borne, and the beacon frame is not suitable for being broadcast at a high frequency.

The second frequency band is a 5GHz frequency band, which is called a high frequency band, the second frequency band is relatively open, the air occupancy rate is low, the wireless access service is less borne, and the beacon frame broadcasting method is suitable for high-frequency beacon frame broadcasting.

The following describes the operation strategies corresponding to the first frequency band and the second frequency band, respectively.

As shown in fig. 3, the method includes:

s301, selecting a first frequency band according to the inherent WLAN frequency band.

The first frequency band may be a 2.4GHz frequency band, and the first frequency band includes a plurality of working channels.

S302, detecting whether the air interface occupancy rate of any working channel in the plurality of working channels is smaller than a first preset threshold value.

And S303, if the air occupancy rate of the working channel is less than a first preset threshold value, broadcasting the beacon frame at a first frequency and a first rate through the working channel.

The first frequency is lower than the preset reference frequency, and the first rate is higher than the preset reference rate, which can be understood as that the AP broadcasts the beacon frame at a low frequency and a high rate through the working channel.

The preset reference frequency and the preset reference rate can be set according to experience, the preset reference frequency is used for distinguishing low frequency from high frequency, and the preset reference rate is used for distinguishing low rate from high rate.

For example, the low frequency in the embodiment of the present application may be to transmit a beacon frame every 100 milliseconds, and the high frequency may be 5.5Mbps or 11 Mbps.

In addition, if the air interface occupancy rate of the working channel is greater than or equal to the first preset threshold, the beacon frame is not broadcast on the working channel, and the step returns to S302 to detect whether the air interface occupancy rates of other working channels in the first frequency band are less than the first preset threshold.

And S304, receiving the detection request sent by the terminal through the working channel within the duration of the first preset period.

The AP broadcasts beacon frames through the working channel, and after broadcasting all the SSIDs in the regional SSID list through the beacon frames, the WLAN receiver can be started, and the detection request sent by the terminal is received on the working channel.

After the duration of the first preset period is exceeded, the AP may repeatedly execute the above S302-S304 until the air interface occupancy rate of each working channel of the first frequency band is detected, and the beacon frame is broadcast through each working channel smaller than the first preset threshold.

By adopting the method, because more services are currently used in the first frequency band, and the air interface occupancy rate of each working channel in the first frequency band is higher compared with that in the second frequency band, before the beacon frame is broadcast through each working channel, the AP can detect the air interface occupancy rate of the working channel, the beacon frame cannot be broadcast on the working channel with the higher air interface occupancy rate, and the wireless access service on the working channel with the higher air interface occupancy rate can be prevented from being influenced. Under the condition that the air interface occupancy rate is smaller than the first preset threshold, the AP may broadcast the beacon frame on the working channel at a low frequency and a high rate, and compared with the case that the beacon frame is broadcast at a high frequency and a low rate, the air interface resource occupied by the embodiment of the present application is less, and the influence on the wireless access service may be reduced.

Strategy two, the working strategy of the second frequency band, as shown in fig. 4, the method includes:

s401, selecting a second frequency band according to the inherent WLAN frequency band.

The second frequency band may be a 5GHz frequency band, and the second frequency band includes a plurality of working channels.

S402, broadcasting the beacon frame at the second frequency and the second rate through one of the working channels.

The second frequency is higher than the preset reference frequency, and the second rate is lower than the preset reference rate. It can be understood that the AP broadcasts beacon frames at a high frequency and low rate through the operating channel.

For example, in the embodiment of the present application, the high rate may be to send a beacon frame every 50 milliseconds, and the low rate may be 1 Mbps.

And S403, receiving the detection request sent by the terminal through the working channel within the duration of a second preset period.

The AP broadcasts beacon frames through the working channel, and after all SSIDs in the area list are broadcasted through the beacon frames, the WLAN receiver can be started, and the detection request sent by the terminal is received on the working channel.

After the duration of the second preset period is exceeded, the AP may repeatedly perform the above S402 to S403 until the beacon frame is broadcast in each working channel in the second frequency band.

By adopting the method, because the service using the second frequency band is less at present, the air interface occupancy rate of each working channel of the second frequency band is low, and the beacon frame broadcast on the second frequency band does not influence the basic wireless access service; moreover, most terminals are dual-band terminals, and can send and receive messages on the working channels of the first frequency band and the second frequency band. Therefore, the AP broadcasts the beacon frame at a high frequency and a low rate on the working channel of the second frequency band, so that the transmission range of the beacon frame is large, the beacon frame is favorably received by more terminals, and the terminals send the detection request, so that the AP can efficiently detect and record the attribute information of the terminals on the basis of not influencing the wireless access service.

It will be appreciated that the regional SSID list typically provided by the third party data provider includes a large number of SSIDs for non-public WLANs, and possibly some wrong SSIDs, which may cause beacon frames broadcast by the APs to include the aforementioned SSIDs for non-public WLANs or wrong SSIDs. The beacon frame sent by the AP cannot enable the AP to obtain valid attribute information of the terminal, and waste of air interface resources is also caused.

In order to solve the above problem, in the embodiment of the present application, after the AC sends the area SSID list to the AP, the area SSID list is screened according to the feedback of the AP, the AC filters an invalid SSID or an incorrect SSID in the area SSID list, and then sends the filtered area SSID list to the AP, so that the AP broadcasts a beacon frame according to the filtered area SSID list.

For convenience of description, in the embodiment of the present application, an area SSID list obtained by the AC from a third-party data provider may be referred to as a first-type SSID, and an area SSID list obtained after the screening may be referred to as a second-type SSID. The method for screening SSIDs is described below, and as shown in fig. 5, the method includes:

s501, the AC sends the SSID of the first type to the AP accessed to the AC.

Wherein the AC may obtain the SSID of the first type from the third party data provider and send the SSID of the first type to the AP.

S502, in the coverage area of the AP, the AP continuously broadcasts a plurality of beacon frames according to the first SSIDs, and each beacon frame comprises one SSID in the area SSID list.

S503, the terminal sends a detection request according to the SSID included in the beacon frame, wherein the detection request includes the SSID to be connected with the terminal and the MAC address of the terminal.

A plurality of terminals in the coverage area of the AP may send probe requests to the AP, which is illustrated in fig. 5 by taking one of the terminals as an example.

S504, the AP generates scanning information according to the detection request.

The scanning information comprises an SSID to be connected with the terminal and an MAC address of the terminal.

The AP may receive probe requests sent by a plurality of terminals, and generate one piece of scanning information according to each probe request.

Specifically, after receiving the probe request, the AP obtains an SSID to be connected to the terminal and an MAC address of the terminal included in the probe request, and determines whether the SSID to be connected to the terminal belongs to a first SSID. And if the SSID to be connected with the terminal is determined to belong to the first class of SSIDs, generating scanning information. The scanning information includes an SSID to which the terminal is to be connected and a MAC address of the terminal.

S505, the AP transmits the scan information to the AC.

In one implementation, each time the AP generates one piece of scanning information within a preset time period, the AP sends one piece of scanning information to the AC.

In another implementation, the AP generates the scanning information within a preset time period after the beacon frame is sent. And after the duration of the preset time period is exceeded, sending the scanning information generated in the preset time period to the AC.

For example, the preset time period may be one week, that is, the AP may generate the scan information one week after transmitting the beacon frame and transmit the scan information generated one week to the AC.

S506, the AC acquires a second SSID from the first SSID according to the SSID to be connected with the terminal and the MAC address of the terminal.

The AC can receive a plurality of pieces of scanning information sent by the AP, and acquire a second SSID from the first SSID according to the SSID to be connected with the terminal and the MAC address of the terminal, which are included in the plurality of pieces of scanning information.

The AC can determine the quantity value of the MAC address of the terminal corresponding to each SSID in the first class of SSIDs according to the SSID to be connected with the terminal and the MAC address of the terminal. Then, each SSID in the first class of SSIDs is sequenced according to the quantity value of the MAC address of the terminal, and a preset number of SSIDs are obtained from the sequenced first class of SSIDs as second class of SSIDs.

As an example, the case of determining the MAC address corresponding to each SSID in the first SSID based on the scanning information is shown in table 1.

TABLE 1

As can be seen from table 1, the number of MAC addresses corresponding to SSID1 is 3, which is MAC1, MAC2, and MAC 3.

The quantity value of the MAC address corresponding to SSID2 is 2, which is MAC1 and MAC2, respectively.

The quantity value of the MAC address corresponding to SSID3 is 2, which is MAC1 and MAC4, respectively.

So, the result of ranking each SSID of the first class of SSIDs is SSID1> SSID 2-SSID 3.

In this embodiment of the present application, if the number values of the MAC addresses corresponding to at least two SSIDs in the first class of SSIDs are the same, the at least two SSIDs are sorted according to the number of times that each SSID appears in the scanning information.

Wherein the AC may determine the number of times each SSID appears in the scan information from the received scan information. If the scanning information comprises the times of the terminal requesting to connect the SSID, the AC can count the times of each SSID appearing in the scanning information according to the times; if the scanning information does not include the times of the terminal requesting to connect the SSID, the AC can respectively count the times of each SSID in the first type of SSID appearing in the scanning information. As an example, the statistical results of the AC are shown in table 1.

By way of example, SSID2 and SSID3 correspond to MAC addresses that are the same in magnitude. However, the SSID2 appears in the scan information 1 + 5-6 times. SSID3 appears in the scan information 1 +1 or 2 times. It can be seen that SSID2 appears more frequently in the scan information than SSID3, so the final ranking results are SSID1> SSID2> SSID 3.

It should be noted that, in the above example, the SSIDs of the first type include 3 SSIDs, and the number of SSIDs included in the SSIDs of the first type is not limited to this in the actual implementation process.

The more the number value of the MAC address corresponding to the SSID is, the more the number of the terminals requesting to connect the SSID is. The more times each SSID of the first type appears in the scanning information, the more times the WLAN corresponding to the SSID is requested to connect by the terminal.

It can be understood that after each SSID in the first SSIDs is sorted by the number value of the MAC address corresponding to each SSID and the number of times that each SSID appears in the scanning information, the earlier SSID sorted in the first SSIDs has a higher reference value for the AP to acquire the attribute information of the terminal, so that the earlier SSID with the preset number is acquired as the second SSID.

For example, the preset number is 30, and if the first-class SSID includes 200 SSIDs, the top 30 SSIDs after the sorting may be acquired as the second-class SSID.

And S507, the AC sends the second type SSID to the AP.

S508, in the coverage area of the AP, the AP continuously broadcasts a plurality of beacon frames according to the second SSIDs, and each beacon frame comprises one of the second SSIDs.

The process of broadcasting the beacon frame and subsequently receiving the probe request sent by the terminal by the AP may refer to the description in the embodiment corresponding to fig. 3 and fig. 4, and is not described herein again.

Since the available WLANs in a given area may change over time, for example, some WLANs that the terminal has historically connected may be permanently replaced by other WLANs, and accordingly, the SSID of the first type collected by the third-party data provider may also change. In order to enable the AP to efficiently detect the attribute information of the terminal, the above S501 to the above S508 may be re-executed at intervals, for example, a month or a quarter, so that the AP may broadcast beacon frames according to the updated SSID.

Through the description of the foregoing steps, the AC may acquire the SSID of the first type and transmit the SSID of the first type to the AP accessing the AC. Then, the AC receives the scanning information acquired by the AP within a preset time period. Since the scanning information is sent after the AP receives the unicast probe request sent by the terminal, the SSID included in the scanning information is an SSID beneficial to helping the AP to probe the attribute information of the terminal, so that the AC can determine which SSIDs in the first class of SSIDs are beneficial to helping the AP to acquire the attribute information of the terminal according to the scanning information. And the AC acquires the second SSID from the first SSID according to the scanning information and sends the second SSID to the AP, so that the AP can broadcast beacon frames aiming at the SSID in the second SSID. The waste of air interface resources is avoided.

Corresponding to the above method embodiment, an embodiment of the present application provides an information obtaining apparatus, which is applied to an access point AP, and as shown in fig. 6, the apparatus includes: an acquisition module 601, a broadcast module 602, and a receiving module 603.

An obtaining module 601, configured to obtain a regional service set identifier SSID list, where the regional SSID list includes an SSID of a wireless local area network WLAN connected to a terminal, and the terminal is located in a designated region;

a broadcasting module 602, configured to continuously broadcast multiple beacon frames in a coverage area of an AP, where each beacon frame includes one SSID in an area SSID list;

the receiving module 603 is configured to receive a probe request sent by the terminal according to the SSID included in the beacon frame, where the probe request includes attribute information of the terminal.

In one implementation, the broadcasting module 602 is specifically configured to:

selecting a first frequency band according to the inherent WLAN frequency band, wherein the first frequency band is a 2.4GHz frequency band and comprises a plurality of working channels;

the receiving module 603 is specifically configured to receive, within a duration of a first preset period, a probe request sent by a terminal through a working channel, where the probe request includes attribute information of the terminal, and the attribute information includes an MAC address of the terminal.

A broadcasting module 602, further configured to:

and the number of the first and second groups,

if the air interface occupancy rate of the working channel is less than the first preset threshold, the procedure of broadcasting the beacon frame at the first frequency and the first speed through the working channel is completed until the air interface occupancy rate of each working channel in the plurality of working channels is detected, and the procedure of broadcasting the beacon frame through each working channel less than the first preset threshold is completed.

In another implementation manner, the broadcasting module 602 is specifically configured to:

the receiving module 601 is further configured to receive, within a duration of a second preset period, a probe request sent by a terminal through a working channel, where the probe request includes attribute information of the terminal, and the attribute information includes an MAC address of the terminal.

The broadcasting module 602, when the duration of the second preset period is exceeded, repeatedly executes a process of broadcasting the beacon frame at the second frequency and the second rate through any one of the plurality of working channels until the beacon frame is broadcast through each of the plurality of working channels.

The embodiment of the present application further provides an AP, as shown in fig. 7, including a processor 701, a communication interface 702, a memory 703 and a communication bus 704, where the processor 701, the communication interface 702, and the memory 703 complete mutual communication through the communication bus 704,

a memory 703 for storing a computer program;

the processor 701 is configured to implement the process executed by the AP in the foregoing method embodiment when executing the program stored in the memory 703.

The communication bus mentioned in the above AP may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.

The communication interface is used for communication between the AP and other devices.

The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.

The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.

In another embodiment provided by the present application, a computer-readable storage medium is further provided, in which a computer program is stored, and the computer program, when executed by a processor, implements the steps of any of the above-mentioned information acquisition methods.

In yet another embodiment provided by the present application, there is also provided a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the information acquisition methods of the above embodiments.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only for the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. An information acquisition method applied to an Access Point (AP), the method comprising:

continuously broadcasting a plurality of beacon frames in the coverage area of the AP, wherein each beacon frame comprises one SSID in the area SSID list;

receiving a detection request sent by the terminal according to the SSID included in the beacon frame, wherein the detection request includes attribute information of the terminal; the probe request is a probe request sent by the terminal to the AP when the SSID is characterized as the WLAN which the terminal accesses.

2. The method of claim 1, wherein continuously broadcasting a plurality of beacon frames within the coverage area of the AP comprises:

selecting a first frequency band according to an inherent WLAN frequency band, wherein the first frequency band is a 2.4GHz frequency band and comprises a plurality of working channels;

if the air interface occupancy rate of the working channel is less than the first preset threshold value, broadcasting the beacon frame through the working channel at a first frequency and a first rate, wherein the first frequency is lower than a preset reference frequency, and the first rate is higher than a preset reference rate;

the receiving of the probe request sent by the terminal according to the SSID included in the beacon frame includes:

and receiving the detection request sent by the terminal through the working channel within the duration of a first preset period, wherein the detection request comprises attribute information of the terminal, and the attribute information comprises an MAC address of the terminal.

3. The method of claim 2, further comprising:

when the duration of the first preset period is exceeded, repeatedly detecting whether the air interface occupancy rate of any working channel in the plurality of working channels is smaller than a first preset threshold value;

and the number of the first and second groups,

and if the air interface occupancy rate of the working channel is less than the first preset threshold, broadcasting the beacon frame at a first frequency and a first speed through the working channel until the air interface occupancy rate of each working channel in the plurality of working channels is detected, and broadcasting the beacon frame through each working channel less than the first preset threshold is finished.

4. The method of claim 1, wherein continuously broadcasting a plurality of beacon frames within the coverage area of the AP comprises:

broadcasting the beacon frame at a second frequency and a second rate through any one of a plurality of working channels, wherein the second frequency is higher than a preset reference frequency, and the second rate is lower than a preset reference rate;

and receiving the detection request sent by the terminal through the working channel within the duration of a second preset period, wherein the detection request comprises attribute information of the terminal, and the attribute information comprises an MAC address of the terminal.

5. The method of claim 4, further comprising:

and when the duration of the second preset period is exceeded, repeatedly executing the process of broadcasting the beacon frame at a second frequency and a second rate through any one working channel of the plurality of working channels until the beacon frame is broadcasted through each working channel of the plurality of working channels.

6. An information acquisition apparatus, applied to an Access Point (AP), the apparatus comprising:

the system comprises an acquisition module, a Service Set Identifier (SSID) acquisition module and a Service Set Identifier (SSID) acquisition module, wherein the SSID acquisition module is used for acquiring an SSID list of a regional Service Set Identifier (SSID), the regional SSID list comprises SSIDs of a Wireless Local Area Network (WLAN) connected with a terminal, and the terminal is positioned in a designated region;

a broadcasting module, configured to continuously broadcast a plurality of beacon frames within a coverage area of the AP, where each beacon frame includes one SSID in the area SSID list;

a receiving module, configured to receive a probe request sent by the terminal according to an SSID included in the beacon frame, where the probe request includes attribute information of the terminal; the probe request is a probe request sent by the terminal to the AP when the SSID is characterized as the WLAN which the terminal accesses.

7. The apparatus of claim 6, wherein the broadcasting module is specifically configured to:

the receiving module is specifically configured to receive, within a duration of a first preset period, the probe request sent by the terminal through the working channel, where the probe request includes attribute information of the terminal, and the attribute information includes an MAC address of the terminal.

8. The apparatus of claim 7, wherein the broadcasting module is further configured to:

and the number of the first and second groups,

9. The apparatus of claim 6, wherein the broadcasting module is specifically configured to:

the receiving module is further configured to receive, within a duration of a second preset period, the probe request sent by the terminal through the working channel, where the probe request includes attribute information of the terminal, and the attribute information includes an MAC address of the terminal.

10. The apparatus of claim 9, wherein the broadcasting module is further configured to: