CN115243336B - Method for preventing wireless terminal from switching among multiple APs - Google Patents
Method for preventing wireless terminal from switching among multiple APs Download PDFInfo
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- CN115243336B CN115243336B CN202211161359.8A CN202211161359A CN115243336B CN 115243336 B CN115243336 B CN 115243336B CN 202211161359 A CN202211161359 A CN 202211161359A CN 115243336 B CN115243336 B CN 115243336B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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Abstract
The invention discloses a method for preventing a wireless terminal from being switched among multiple APs, which relates to the technical field of AP switching and aims to solve the problem of unstable connection between a wireless intelligent terminal and an AP in the prior art due to switching, and comprises the steps of configuring a network; through signal strength information comparison, marking the selected AP with an open connection mark for the wireless intelligent terminal; when a new AP is accessed, if the AP is abnormal, discarding the AP, and if the AP is not abnormal, hiding the AP; the wireless intelligent terminal is prevented from actively scanning or passively scanning; if the wireless intelligent terminal is disconnected with the AP and the disconnection time exceeds a first disconnection time threshold value, the information of the wireless intelligent terminal is cleared; when the AP is restarted, if the wireless intelligent terminal is not reconnected with the AP within the second disconnection time threshold, the AP with the best signal is reselected and connected; the invention has the advantage of more stable AP connection.
Description
Technical Field
The invention relates to the technical field of AP switching, in particular to the technical field of a method for preventing a wireless terminal from switching among multiple APs.
Background
The AP is referred to as Access Point for short, and generally translated into a "wireless Access node," which mainly provides a wireless terminal to Access a wired local area network bidirectionally, and wireless terminals within the coverage of the Access Point can communicate with each other through the AP.
The wireless intelligent terminal is connected with the AP through a scanning mode, and the scanning mode is divided into two modes. One is active scanning, the wireless intelligent terminal searches for the AP by broadcasting a Probe Req frame, the AP sends a Probe Rsp frame carrying SSID information to the wireless intelligent terminal after receiving the Probe Rsp frame, and the wireless intelligent terminal establishes connection with the AP through the SSID information. The other is passive scanning, and the wireless intelligent terminal periodically monitors a Beacon frame (Beacon frame) of the AP, so as to establish connection with the AP through SSID information carried by the Beacon frame.
In the whole connection process, the intelligent terminal judges the signal value of the AP to select the AP with better signal for connection, and when the intelligent terminal device searches that the signals of a plurality of APs in the range are weak and close. The following situations may arise: because there is interference factor's existence in real environment, AP's signal value is unchangeable for a long time, when the signal is lower, intelligent terminal can initiatively seek, when at time 1, intelligent terminal can seek AP 1's signal value higher, the terminal will be gone to connect AP1 this moment, when at time 2, intelligent terminal seeks AP 2's signal value again higher, intelligent terminal can go to connect AP2 this moment, the in-process of switching network repeatedly here leads to wireless intelligent terminal to relapse the off-line.
In the prior art, under the conditions that signals are good and the difference between the signal values of the APs is large, communication between the wireless intelligent terminal and the APs can be efficiently and stably realized, when the wireless intelligent terminal searches for a plurality of APs in a range, and the signal values of the APs are weak and close, in such a condition, stable communication between the wireless intelligent terminal and the APs cannot be achieved in the prior art.
Disclosure of Invention
The invention aims to: the problem of unstable connection caused by switching between wireless intelligent terminal and AP in the prior art is solved. In order to solve the above technical problem, the present invention provides a method for preventing a wireless terminal from switching among multiple APs.
The invention specifically adopts the following technical scheme for realizing the purpose:
a method of preventing a wireless terminal from switching between multiple APs, comprising the steps of:
and (3) configuring a network: configuring a connection network of the wireless intelligent terminal and the AP;
the method comprises the steps that the wireless intelligent terminal scans the AP, the AP with the best signal is selected by comparing signal strength information, and the selected AP is marked with an open connection mark for the wireless intelligent terminal;
the wireless intelligent terminal is connected with the AP with the best signal;
the wireless intelligent terminal is prevented from carrying out active scanning or passive scanning to discover and connect other APs; the mode for preventing the wireless intelligent terminal from actively scanning is as follows: the mark which does not respond to the wireless intelligent terminal is marked on other APs and is hidden, and the mode for preventing the wireless intelligent terminal from carrying out passive scanning is as follows: hiding SSID information carried by Beacon frames of other APs;
when a new AP is accessed, judging whether the AP is abnormal or not, if so, discarding, and if not, marking a non-response terminal and hiding;
if the wireless intelligent terminal is disconnected with the AP and the disconnection time exceeds a first disconnection time threshold, removing the information of the wireless intelligent terminal from the association list, and setting all the APs to be in a state to be accessed, otherwise, not operating;
and when the AP is restarted, if the wireless intelligent terminal cannot be reconnected within the second disconnection time threshold, marking open connection marks on the wireless intelligent terminal on all the APs, reselecting the AP with the best signal and connecting, and otherwise, not operating.
Preferably, the method for determining whether the AP is abnormal includes: and if the signal value of the down-hanging terminal of the AP is lower than 35db, judging the AP is abnormal, otherwise, judging the AP is not abnormal.
Preferably, the method for marking other APs with the mark not responding to the wireless intelligent terminal and hiding the other APs comprises the following steps:
and the AP which is not connected with the wireless intelligent terminal binds the wireless intelligent terminal with the Drop mark, and when the AP which is not connected with the wireless intelligent terminal receives a Probe Req frame sent by the wireless intelligent terminal, the AP discards the Probe Req frame so as to achieve the aim of not responding to the wireless intelligent terminal.
Preferably, the method for binding the wireless intelligent terminal and the Drop mark by the AP which is not connected with the wireless intelligent terminal comprises the following steps: binding is done by MAC address.
Preferably, the method for hiding SSID information carried by Beacon frames of other APs comprises: and after 15 minutes of starting to configure the network, performing hiding WiFi information of other APs, wherein the WiFi information comprises SSID information carried by a Beacon frame of the AP.
Preferably, the first disconnection time threshold is 120 seconds.
Preferably, when the AP with the best signal is selected, if a restart of the whole network is encountered, the selection of the AP with the best signal needs to be performed after the restart of the whole network is performed for 30 seconds, and the restart of the whole network is that all the APs are restarted.
Preferably, the second disconnection time threshold is 120 seconds.
The invention has the following beneficial effects:
only the AP with the optimal AP label can respond to the request of the terminal, or the terminal request can be responded in the distribution network mode stage, so that the switching problem is restrained to a certain extent;
the SSID information is hidden by default, and the problem of unstable connection caused by redundant active scanning and passive scanning is solved;
selecting an AP with an optimal signal through signal strength information comparison, marking an optimal AP label on the AP to respond to a terminal request, and marking all request labels of discarded terminals on the rest APs to improve the connection quality;
when a new AP is accessed, the AP judges the signal value of the off-hook terminal, if the signal value is lower than 35db, the AP actively kicks off the terminal, the AP is reselected to open the connection, and the marks of the non-response terminal are marked on the other APs, so that the signal quality is further ensured, and the stable connection is ensured.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 invention.
Example 1
A wireless Access Point (AP), which is equivalent to a bridge connecting a network and a wireless network, is mainly used to connect wireless network clients together and then access the wireless network to an ethernet network.
The wireless intelligent terminal scans a plurality of APs in the range, the signal values of the APs are low and close, and under the condition, the wireless intelligent terminal can be repeatedly switched among the APs, so that the wireless intelligent terminal device is repeatedly offline and disconnected, and normal use of a user is influenced.
Therefore, the present embodiment provides a method for preventing a wireless terminal from switching among multiple APs, comprising the following steps:
configuring a network: configuring a connection network of the wireless intelligent terminal and the AP; the network configuration mainly means that BXoT (the function name) is opened on an AC page, a Wifi name and a password are set, and configuration work is done for connection of the AP and the wireless intelligent terminal;
after the basic configuration is completed, selecting the AP with the best signal through signal strength information comparison, and marking the selected AP with an open connection mark for the wireless intelligent terminal; in this step, the wireless intelligent terminal sends scanning frames to the periphery when scanning the peripheral APs, each AP can obtain a corresponding signal strength when receiving the scanning frame, the obtained signal strengths are different due to the fact that the distances between the APs and the terminal are different, the APs are compared by the obtained signal strengths, and finally an AP with the optimal signal is selected from the APs, namely, when the wireless intelligent terminal scans, the AP synchronizes the signal strength information of the terminal to the neighbor APs, the AP with the optimal signal is selected through the comparison of the signal strength information, and the AP with the optimal signal is used for being connected with the wireless intelligent terminal;
the wireless intelligent terminal is connected with the AP with the best signal;
the wireless intelligent terminal is prevented from actively scanning or passively scanning to discover and connect other APs; the mode for preventing the wireless intelligent terminal from actively scanning is as follows: the mark which does not respond to the wireless intelligent terminal is marked on other APs and is hidden, and the mode for preventing the wireless intelligent terminal from carrying out passive scanning is as follows: hiding SSID information carried by Beacon frames of other APs; therefore, unstable connection caused by switching of the wireless intelligent terminal in different APs is prevented;
when a new AP is accessed, judging whether the AP is abnormal or not, if so, discarding, and if not, marking a mark which does not respond to the terminal and hiding the mark; the implementation principle here is: when a new AP is accessed, the information of the new AP is automatically synchronized to other accessed APs.
If the wireless intelligent terminal is disconnected with the AP and the disconnection time exceeds a first disconnection time threshold value, removing the information of the wireless intelligent terminal from the association list, and setting all the APs to be in a state to be accessed, otherwise, not operating;
and when the AP is restarted, if the wireless intelligent terminal cannot be reconnected with the AP within the second disconnection time threshold, marking open connection marks on the wireless intelligent terminal on all the APs, reselecting the AP with the best signal for connection by the wireless intelligent terminal, and otherwise, not operating.
Example 2
The present embodiment is based on the technical solution of embodiment 1, and mainly details the method for determining the abnormality of the newly accessed AP.
As a preferable solution of this embodiment, the method for determining whether the AP is abnormal includes: and if the signal value of the down-hanging terminal of the AP is lower than 35db, judging the AP is abnormal, otherwise, judging the AP is not abnormal.
Therefore, the new AP with low quality is discarded, but particularly, the AP which is accessed before can not discard the signal value of the down-hanging terminal of the AP which is accessed before even if the problem occurs, the signal value of the down-hanging terminal of the AP becomes lower than 35 db.
Example 3
Based on the technical solution of embodiment 1, this embodiment describes how to specifically prevent the wireless intelligent terminal from discovering and connecting in an active scanning manner.
First, the principle of active scanning is: the wireless intelligent terminal searches for the AP by broadcasting the Probe Req frame, the AP sends the Probe Rsp frame carrying SSID information to the wireless intelligent terminal after receiving the Probe Rsp frame, and the wireless intelligent terminal establishes connection with the AP through the SSID information.
Therefore, in this embodiment, the method for preventing the wireless intelligent terminal from discovering and connecting the AP in an active scanning manner, that is, marking other APs with a mark that does not respond to the wireless intelligent terminal and is hidden includes the following steps:
and the AP which is not connected with the wireless intelligent terminal binds the wireless intelligent terminal with the Drop mark, and when the AP which is not connected with the wireless intelligent terminal receives a Probe Req frame sent by the wireless intelligent terminal, the AP discards the Probe Req frame so as to achieve the aim of not responding to the wireless intelligent terminal. All frames sent by the wireless intelligent terminal after being bound with the Drop mark are discarded by the corresponding AP.
Specifically, if an accident occurs, all APs bind the wireless smart terminal to the Drop flag, and the frame of the wireless smart terminal at this time is discarded by all APs, so the AP checks the situation, and opens all APs after finding the problem.
Further, as a preferred scheme, the method for binding the wireless intelligent terminal and the Drop mark by the AP which is not connected with the wireless intelligent terminal comprises the following steps: binding is done by MAC address.
Example 4
The embodiment is based on the technical solution of embodiment 1, and describes how to prevent the wireless intelligent terminal from adopting passive scanning to discover and connect.
The principle of passive scanning is as follows: the wireless intelligent terminal periodically monitors Beacon frames (Beacon frames) of the AP, so that connection with the AP is established through SSID information carried by the Beacon frames.
Therefore, in this embodiment, the method for preventing the wireless intelligent terminal from discovering and connecting the AP in the passive scanning manner, that is, the method for hiding the SSID information carried by the Beacon frame of another AP, includes the following steps:
and hiding SSID information carried by the Beacon frame of the AP.
As a preferred scheme, hiding the SSID information carried by the Beacon frame of the AP is performed after 15 minutes of starting to configure the network. The normal start of configuring a network may be implemented by a button that is pressed to enter the configure network mode, i.e. SSID information hiding is performed after the 15 minutes, during which 15 minutes it is generally sufficient for the user to complete configuring the network.
Example 5
Based on the technical solution of embodiment 1, this embodiment optimizes "if the wireless intelligent terminal is disconnected from the AP and the disconnection time exceeds the first disconnection time threshold, the wireless intelligent terminal information is cleared from the association list, and all the APs are set to be in the to-be-accessed state".
As a preferable solution of this embodiment, the first disconnection time threshold may be selected to be 120 seconds.
Example 6
This embodiment is based on the technical solution of embodiment 1, and is improved for selecting the AP with the best signal.
When the AP with the best signal is selected, if the whole network is restarted, the AP with the best signal needs to be selected after waiting for 30 seconds of the whole network restart, and the whole network restart means that all APs are restarted.
Example 7
In this embodiment, the second disconnection time threshold is set in detail based on the technical solution of embodiment 1.
In this embodiment, the second disconnection time threshold is 120 seconds.
Claims (8)
1. A method for preventing a wireless terminal from switching between multiple APs, comprising the steps of:
configuring a network: configuring a connection network of the wireless intelligent terminal and the AP;
the method comprises the steps that the wireless intelligent terminal scans the AP, the AP with the best signal is selected by comparing signal strength information, and the selected AP is marked with an open connection mark for the wireless intelligent terminal;
the wireless intelligent terminal is connected with the AP with the best signal;
the wireless intelligent terminal is prevented from carrying out active scanning or passive scanning to discover and connect other APs; the mode for preventing the wireless intelligent terminal from actively scanning is as follows: marking other APs with marks which do not respond to the wireless intelligent terminal and hiding the marks; the mode for preventing the wireless intelligent terminal from carrying out passive scanning is as follows: hiding SSID information carried by Beacon frames of other APs;
when a new AP is accessed, judging whether the AP is abnormal or not, if so, discarding, and if not, marking a non-response terminal and hiding;
if the wireless intelligent terminal is disconnected with the AP and the disconnection time exceeds a first disconnection time threshold, removing the information of the wireless intelligent terminal from the association list, and setting all the APs to be in a state to be accessed, otherwise, not operating;
and when the AP is restarted, if the wireless intelligent terminal cannot be reconnected with the AP within the second disconnection time threshold, marking open connection marks on the wireless intelligent terminal on all the APs, reselecting the AP with the best signal for connection by the wireless intelligent terminal, and otherwise, not operating.
2. The method of claim 1, wherein the method for determining whether the AP is abnormal comprises: and if the signal value of the down-hanging terminal of the AP is lower than 35db, judging the AP is abnormal, otherwise, judging the AP is not abnormal.
3. The method of claim 1, wherein the method of marking other APs that do not respond to the wireless intelligent terminal and are hidden comprises the following steps:
and the AP which is not connected with the wireless intelligent terminal binds the wireless intelligent terminal with the Drop mark, and when the AP which is not connected with the wireless intelligent terminal receives a Probe Req frame sent by the wireless intelligent terminal, the AP discards the Probe Req frame so as to achieve the aim of not responding to the wireless intelligent terminal.
4. The method of claim 3, wherein the AP not connected to the wireless smart terminal binds the wireless smart terminal to the Drop flag by: binding is done by MAC address.
5. The method according to claim 1, wherein the method for hiding SSID information carried by Beacon frames of other APs comprises: and after 15 minutes of starting to configure the network, performing hiding WiFi information of other APs, wherein the WiFi information comprises SSID information carried by the Beacon frame.
6. The method of claim 1, wherein the first time threshold for disconnection is 120 seconds.
7. The method as claimed in claim 1, wherein when selecting the AP with the best signal, if a network restart is encountered, the method waits for 30 seconds before selecting the AP with the best signal, and the network restart is a restart of all APs.
8. The method of claim 1, wherein the second time threshold for disconnection is 120 seconds.
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Denomination of invention: A method to prevent wireless terminals from switching between multiple APs Granted publication date: 20221220 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: Wuhan honeycomb E-Net Technology Co.,Ltd. Registration number: Y2024980009509 |
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