A method and apparatus for a dual-band Wi-Fi terminal to select a wireless access point

Abstract

Embodiments of the present application disclose a method and device for selecting a wireless access point by a dual-frequency Wi-Fi terminal. Signal strength data of each wireless access point is continuously collected, and whether an access instruction is received is monitored. When the access instruction is received, signal strength data of each wireless access point in a first preset time period is used to construct a current signal strength overall distribution of each wireless access point. Signal strength data of each wireless access point in a second preset time period is used as current sample data of the corresponding wireless access point. An average value of the current sample data of each wireless access point is calculated respectively. Whether the two average values have a significant difference at a preset level is judged by a t-test method. If yes, a wireless access point with an average value significantly greater than the other at the preset level is selected for access. If not, a wireless access point is selected for access based on the t-test method, according to the current signal strength overall distribution and the current sample data of each wireless access point.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of wireless technology, and particularly relates to a method and device for selecting a wireless access point by a dual-band Wi-Fi terminal. BACKGROUND

[0002] The wireless access point AP refers to a wireless switch for a wireless network, and is an access point for a mobile device to enter a wired network, and is mainly used for broadband homes, building interiors and park interiors, and can cover tens of meters to hundreds of meters.

[0003] The dual-band Wi-Fi terminal is a terminal supporting 2.4GHz / 5GHz dual-band wireless signals, and in a normal case, the dual-band Wi-Fi terminal often preferentially selects the AP of the 5G frequency band, but the wall-penetration capability of the 5G frequency band is weak, and the transmission range is not large enough, so the AP of the 5G frequency band is not always the optimal choice. When the signal quality is poor, the AP of the 5G frequency band is not as stable as the AP of the 2.4G frequency band. Therefore, if the dual-band Wi-Fi terminal selects to access the AP of the 5G frequency band when the AP of the 5G frequency band is unstable, the connection quality is poor and the transmission rate is low, which seriously affects the user experience.

[0004] At present, when the dual-band Wi-Fi terminal selects an AP to access, it often only makes a decision by judging the current signal strength RSSI of the AP. However, the RSSI is a variable changing with time, and if the wireless environment is relatively stable, the RSSI will fluctuate in a small range above and below a stable mean value. If the wireless environment is unstable, the interval of the value of the RSSI changing with time is large, and therefore, it is risky to judge the signal quality of the AP only by the current RSSI. If the dual-band Wi-Fi terminal selects to access when the current RSSI of the AP is good, and the signal quality of the AP becomes poor at the next moment, then the decision is a failure. SUMMARY

[0005] The embodiments of the present application provide a method and device for selecting a wireless access point by a dual-band Wi-Fi terminal, to solve the problem in the prior art that the dual-band Wi-Fi terminal cannot accurately select a current optimal wireless access point when the wireless environment is unstable.

[0006] To solve the above technical problem, the embodiments of the present application disclose the following technical scheme:

[0007] One aspect of the present application provides a method for selecting a wireless access point by a dual-band Wi-Fi terminal, for the dual-band Wi-Fi terminal to select one of the wireless access points of the 5G and 2.4G frequency bands to access, comprising:

[0008] continuously collecting signal strength data of each wireless access point;

[0009] monitoring whether access instruction is received,

[0010] if access instruction is received, constructing current signal strength population distribution of each wireless access point respectively by using signal strength data of each wireless access point in a first preset time period, the end time of the first preset time period being the current time;

[0011] respectively taking signal strength data of each wireless access point in a second preset time period as current sample data of the corresponding wireless access point, the end time of the second preset time period being the current time, and the length of the second preset time period being less than the length of the first preset time period;

[0012] calculating the average value of the current sample data of each wireless access point respectively;

[0013] judging whether the average values of the current sample data of two wireless access points have significant difference at a preset level by using t-test method,

[0014] if yes, selecting the wireless access point whose average value is significantly greater than the other at the preset level to access;

[0015] if no, selecting one wireless access point to access based on t-test method according to the current signal strength population distribution and the current sample data of each wireless access point.

[0016] Optionally, the selecting one wireless access point to access based on t-test method according to the current signal strength population distribution and the current sample data of each wireless access point comprises:

[0017] for each wireless access point, judging whether the current sample data belongs to the corresponding current signal strength population distribution according to the t-test method,

[0018] if yes, determining that the signal quality of the wireless access point is stable, and taking the wireless access point as a pending wireless access point;

[0019] judging whether there are two pending wireless access points,

[0020] if yes, judging whether the average value of the current sample data of each pending wireless access point is greater than the corresponding preset threshold value respectively, if yes, determining that the signal quality of the pending wireless access point is high;

[0021] judging whether only one pending wireless access point has high signal quality,

[0022] if yes, selecting the pending wireless access point with high signal quality to access.

[0023] Optionally, when it is determined that the signal quality of the non-only one pending wireless access point is high, the method further comprises:

[0024] Respectively acquiring the occupation data of the channel where each pending wireless access point is located, the occupation data comprising adjacent frequency interference data and co-frequency interference data;

[0025] Judging whether there is a pending wireless access point whose occupation data is less than another one, if yes, selecting the pending wireless access point with the less occupation data to access;

[0026] If no, selecting the wireless access point of the 5G frequency band to access.

[0027] Optionally, when it is determined that there is no two pending wireless access points, the method further comprises:

[0028] Judging whether there is a pending wireless access point,

[0029] If there is a pending wireless access point, judging whether the average value of the current sample data of the pending wireless access point is greater than the corresponding preset threshold value,

[0030] If yes, selecting the pending wireless access point to access; if no, selecting another wireless access point except the pending wireless access point to access.

[0031] Optionally, when it is determined that there is no pending wireless access point, the method further comprises:

[0032] Respectively acquiring the occupation data of the channel where each wireless access point is located, the occupation data comprising adjacent frequency interference data and co-frequency interference data;

[0033] Judging whether there is a wireless access point whose occupation data is less than another one,

[0034] If yes, selecting the wireless access point to access;

[0035] If no, selecting the wireless access point of the 5G frequency band to access.

[0036] Another aspect of the present application provides a device for selecting a wireless access point by a dual-frequency Wi-Fi terminal, for selecting one of the wireless access points of the 5G and 2.4G frequency bands by the dual-frequency Wi-Fi terminal to access, comprising:

[0037] A data acquisition module for continuously acquiring the signal strength data of each wireless access point;

[0038] An instruction monitoring module for monitoring whether an access instruction is received;

[0039] The overall distribution constructing module is configured to, when the access instruction is received, construct the current signal strength overall distribution of each wireless access point by using the signal strength data of each wireless access point in a first preset time period, wherein the end time of the first preset time period is the current time;

[0040] The current sample data obtaining module is configured to, respectively, take the signal strength data of each wireless access point in a second preset time period as the current sample data of the corresponding wireless access point, wherein the end time of the second preset time period is the current time, and the length of the second preset time period is less than the length of the first preset time period;

[0041] The average value calculating module is configured to calculate the average value of the current sample data of each wireless access point, respectively;

[0042] The judging module is configured to judge whether the average values of the current sample data of two wireless access points have significant difference at a preset level by using the t-test method.

[0043] The access module is configured to, when the average values of the current sample data of two wireless access points have significant difference at a preset level, select the wireless access point with the average value significantly greater than the other one at the preset level to access.

[0044] The access module is further configured to, when the average values of the current sample data of two wireless access points do not have significant difference at a preset level, select one wireless access point to access based on the t-test method according to the current signal strength overall distribution and the current sample data of each wireless access point.

[0045] The embodiment of the present application provides a method and device for selecting a wireless access point by a dual-frequency Wi-Fi terminal, signal strength data of each wireless access point is continuously collected, whether an access instruction is received is monitored, and when the access instruction is received, the current signal strength overall distribution of each wireless access point is constructed by using the signal strength data of each wireless access point in a first preset time period. Furthermore, the signal strength data of each wireless access point in a second preset time period is taken as the current sample data of the corresponding wireless access point. The average value of the current sample data of each wireless access point is calculated, respectively, whether the average values have significant difference at a preset level is judged by using the t-test method, if yes, the wireless access point with the average value significantly greater than the other one at the preset level is selected to access, and if not, one wireless access point is selected to access based on the t-test method according to the current signal strength overall distribution and the current sample data of each wireless access point.

[0046] The embodiment of the present application adopts the method of comparing signal strength data in a period of time, and by using the t-test method of statistics, the decision error rate of the dual-frequency Wi-Fi terminal when selecting a wireless access point can be greatly reduced. Attached Figure Description

[0047] Figure 1 This is a flowchart illustrating a method for a dual-band Wi-Fi terminal to select a wireless access point, as provided in an embodiment of the present invention.

[0048] Figure 2 A schematic diagram of a first preset time period and a second preset time period provided for embodiments of the present invention;

[0049] Figure 3 An implementation provided for one embodiment of the present invention Figure 1 A flowchart illustrating step S108;

[0050] Figure 4 This is a schematic diagram of a device for selecting a wireless access point for a dual-band Wi-Fi terminal, provided in an embodiment of the present invention. Detailed Implementation

[0051] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] Figure 1 This is a flowchart illustrating a method for a dual-band Wi-Fi terminal to select a wireless access point. In the embodiments disclosed in this invention, this method is used for a dual-band Wi-Fi terminal to select one of two wireless access points, one for 5G and one for 2.4G frequency bands, for access. Figure 1 As shown, the method includes the following steps:

[0053] Step S101: Continuously collect signal strength data for each wireless access point.

[0054] The system continuously collects signal strength data from wireless access points on both the 5G and 2.4G frequency bands. The time interval between two consecutive collections is a pre-set fixed value, for example, the collection interval can be 100 milliseconds.

[0055] Step S102: Monitor whether an access command has been received.

[0056] When a user needs to choose one of two wireless access points to access the network, an access command will be sent, and the system will monitor whether the access command has been received.

[0057] When an access command sent by a user is detected, step S103 is executed; if no access command is detected, monitoring continues.

[0058] Step S103: Construct the overall signal strength distribution of each wireless access point using the signal strength data of each wireless access point within the first preset time period.

[0059] For each wireless access point, the overall signal strength distribution of the wireless access point is constructed as follows:

[0060] The moment when the access command is received is taken as the current moment. Using all signal strength data of the wireless access point in the first preset time period before the current moment, the overall signal strength distribution of the wireless access point is constructed. The end time of the first preset time period is the current moment.

[0061] Step S104: Take the signal strength data of each wireless access point during the second preset time period as the current sample data of the corresponding wireless access point.

[0062] For each wireless access point, the signal strength data of that access point within a second preset time period prior to the current time is used as the current sample data for that access point. The end time of the second preset time period is the current time, and the duration of the second preset time period is shorter than the duration of the first preset time period; that is, the first preset time period includes the second preset time period. For example, the 3 seconds prior to the current time can be set as the second preset time period, and the 1 minute prior to the current time can be set as the first preset time period.

[0063] like Figure 2 As shown, t is the current time, i.e., the time when the access command is received; T N The first preset time period; T n This is the second preset time period. (T) N and T n The termination time is the current time t. n Less than T N T n Included in T N Inside.

[0064] Step S105: Calculate the average value of the current sample data for each wireless access point.

[0065] After obtaining the current sample data for each wireless access point, the average value of the current sample data for each wireless access point is calculated.

[0066] Step S106: Use the t-test method to determine whether the two means are significantly different at the preset level.

[0067] After obtaining the average value of the current sample data for each wireless access point, the t-test method is used to compare the significance difference between the two. In a specific embodiment disclosed in this invention, the preset level α = 0.01.

[0068] If the two average values ​​have a significant difference at a preset level, it is considered that the current signal strength of the two wireless access points has a significant difference, and then step S107 is executed.

[0069] Step S107: selecting the wireless access point whose average value is significantly greater than the other one at a preset level to access.

[0070] When the current signal strengths of the two wireless access points have a significant difference, it is determined that the average value of the current sample data is significantly greater than the other one at a preset level, and the dual-band Wi-Fi terminal selects the wireless access point with higher signal strength to access.

[0071] If the two average values do not have a significant difference at a preset level, it is considered that the current signal strengths of the two wireless access points do not have a significant difference, and then step S108 is performed.

[0072] Step S108: selecting a wireless access point to access based on a t-test method according to the current signal strength population distribution and the current sample data of each wireless access point.

[0073] In one embodiment of the present disclosure, as shown in FIG. 8, the step can be implemented by the following sub-steps: Figure 3

[0074] Step S811: determining whether the current sample data belongs to the corresponding current signal strength population distribution according to the t-test method for each wireless access point.

[0075] Taking one wireless access point as an example, after obtaining the current signal strength population distribution and the current sample data of the wireless access point, it is determined whether the current sample data belongs to the current signal strength population distribution according to the t-test method.

[0076] If the current sample data belongs to the corresponding current signal strength population distribution, step S812 is performed.

[0077] Step S812: determining that the signal quality of the wireless access point is stable, and taking the wireless access point as a pending wireless access point.

[0078] When the current sample data of a wireless access point belongs to the corresponding current signal strength population distribution, it is determined that the current signal quality of the wireless access point is stable, and the wireless access point is taken as a pending wireless access point.

[0079] If the current sample data does not belong to the corresponding current signal strength population distribution, it is determined that the current signal quality of the wireless access point is unstable.

[0080] After determining whether the signal quality of each wireless access point is stable, and confirming the pending wireless access point, step S813 is performed.

[0081] Step S813: determining whether there are two pending wireless access points. ​

[0082] Based on the determination results in the aforementioned steps, it can be confirmed how many of the two wireless access points are pending wireless access points. The number of pending wireless access points can be two, one, or none.

[0083] If there are two pending wireless access points, proceed to step S814.

[0084] Step S814: Determine whether the average value of the current sample data of each pending wireless access point is greater than its corresponding preset threshold.

[0085] Each wireless access point has a corresponding independent preset threshold for its signal strength data. The average value of the current sample data of each pending wireless access point is determined to be greater than its corresponding preset threshold.

[0086] If the average value of the current sample data of the pending wireless access point is greater than the corresponding preset threshold, then proceed to step S815.

[0087] Step S815: Determine that the signal quality of the wireless access point to be determined is high.

[0088] If the average value of the current sample data of a certain wireless access point is greater than the corresponding preset threshold, then the signal quality of the wireless access point is determined to be high.

[0089] If the average value of the current sample data of a certain wireless access point is not greater than the corresponding preset threshold, then the signal quality of the wireless access point is determined to be low.

[0090] After determining the signal quality of each pending wireless access point, proceed to step S816.

[0091] Step S816: Determine whether only one pending wireless access point has a high signal quality.

[0092] If there is only one pending wireless access point with high signal quality, select that pending wireless access point with high signal quality for access.

[0093] If it is not only one candidate wireless access point with high signal quality, two situations may exist: 1. Both candidate wireless access points have high signal quality; 2. Both candidate wireless access points have low signal quality. In one embodiment of the present invention, if either of these situations occurs, the following sub-steps are performed:

[0094] Step S817: Obtain the channel occupancy data for each pending wireless access point.

[0095] By scanning all surrounding wireless access points, the occupancy data of the channel for each potential wireless access point can be obtained. This occupancy data includes adjacent channel interference data and co-channel interference data.

[0096] Step S818: judging whether there is a pending wireless access point whose occupation data is less than another one.

[0097] If the adjacent frequency interference data and the co-frequency interference data of one pending wireless access point are both less than those of another pending wireless access point, the pending wireless access point with less occupation data is selected for access.

[0098] If the adjacent frequency interference data and the co-frequency interference data of one pending wireless access point are not both less than those of another pending wireless access point, for example, the adjacent frequency interference data of one pending wireless access point is less than that of another pending wireless access point, but the co-frequency interference data of the former is greater than that of the latter, the occupation data of the former is not less than that of the latter. In this case, the wireless access point of the 5G frequency band is selected for access.

[0099] In one embodiment of the present disclosure, after step S813 is performed, if it is determined that there are not two pending wireless access points, step S819 is performed.

[0100] Step S819: judging whether there is a pending wireless access point,

[0101] If it is determined that there is a pending wireless access point, step S820 is performed.

[0102] Step S820: judging whether the average value of the current sample data of the pending wireless access point is greater than the corresponding preset threshold value.

[0103] If the average value of the current sample data of the pending wireless access point is greater than the corresponding preset threshold value, it indicates that the current signal quality of the pending wireless access point is high, and the pending wireless access point is selected for access.

[0104] If the average value of the current sample data of the pending wireless access point is not greater than the corresponding preset threshold value, it indicates that the current signal quality of the pending wireless access point is not high, and another wireless access point except the pending wireless access point is selected for access.

[0105] In one embodiment of the present disclosure, if it is confirmed that there is not a pending wireless access point after step S819 is performed, step S821 is performed.

[0106] Step S821: obtaining the occupation data of the channel where each wireless access point is located.

[0107] Similar to the acquisition of the channel occupancy data of each pending wireless access point in the foregoing embodiment, the channel occupancy data of each wireless access point is acquired respectively, and the occupancy data includes adjacent frequency interference data and co-frequency interference data

[0108] Step S822: judging whether there is a wireless access point whose occupancy data is less than that of another wireless access point.

[0109] Similar to the judgment of the pending wireless access point in the foregoing embodiment, it is judged whether there is a wireless access point whose adjacent frequency interference data and co-frequency interference data are less than those of another wireless access point.

[0110] If such a wireless access point exists, the wireless access point is selected for access.

[0111] If such a wireless access point does not exist, a wireless access point of the 5G frequency band is selected for access.

[0112] Figure 4 A structural schematic diagram of a device for selecting a wireless access point for a dual-frequency Wi-Fi terminal disclosed in an embodiment of the present application is shown in FIG. 1. The device is used for selecting a wireless access point in the 5G and 2.4G frequency bands for a dual-frequency Wi-Fi terminal to access. As shown in FIG. 1, the device includes the following modules: Figure 4

[0113] A data collection module 11 is configured to continuously collect signal strength data of each wireless access point.

[0114] An instruction monitoring module 12 is configured to monitor whether an access instruction is received.

[0115] A total distribution construction module 13 is configured to, when the access instruction is received, respectively construct a current signal strength total distribution of each wireless access point by using signal strength data of each wireless access point in a first preset time period, and a terminal time of the first preset time period is a current time.

[0116] A current sample data acquisition module 14 is configured to respectively take signal strength data of each wireless access point in a second preset time period as current sample data of the corresponding wireless access point, a terminal time of the second preset time period is the current time, and a length of the second preset time period is less than a length of the first preset time period.

[0117] An average value calculation module 15 is configured to respectively calculate an average value of the current sample data of each wireless access point.

[0118] A judgment module 16 is configured to judge whether the average values of the current sample data of two wireless access points have a significant difference at a preset level by using a t-test method.

[0119] ​The access module 17 is configured to select the wireless access point with the average of the current sample data significantly larger than the other one at the preset level to access when the average of the current sample data of the two wireless access points has significant difference at the preset level;

[0120] The access module 18 is further configured to select one wireless access point to access based on the t-test method according to the current signal strength population distribution and the current sample data of each wireless access point when the average of the current sample data of the two wireless access points has no significant difference at the preset level.

[0121] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered to be within the protection scope of the present application.

Claims

1. A method for a dual-band Wi-Fi terminal to select a wireless access point, used for the dual-band Wi-Fi terminal to select one wireless access point from two frequency bands, 5G and 2.4G, for access, characterized in that, include: Continuously collect signal strength data for each wireless access point; Monitor whether an access command has been received. If an access command is received, the signal strength data of each wireless access point within the first preset time period is used to construct the overall signal strength distribution of each wireless access point. The end time of the first preset time period is the current time. The signal strength data of each wireless access point within the second preset time period is used as the current sample data of the corresponding wireless access point. The end time of the second preset time period is the current time, and the duration of the second preset time period is less than the duration of the first preset time period. Calculate the average value of the current sample data for each wireless access point; The t-test method is used to determine whether the average values ​​of the current sample data from the two wireless access points are significantly different at a preset level. If so, select the wireless access point whose average value is significantly greater than the other at the preset level for access; If not, based on the t-test method, a wireless access point is selected for access according to the current overall signal strength distribution of each wireless access point and the current sample data.

2. The method according to claim 1, characterized in that, The t-test-based method selects a wireless access point for access based on the overall signal strength distribution and current sample data of each wireless access point, including: For each wireless access point, a t-test is used to determine whether the current sample data belongs to the corresponding current overall signal strength distribution. If so, determine that the signal quality of the wireless access point is stable, and designate the wireless access point as a potential wireless access point; Determine if there are two pending wireless access points. If so, determine whether the average value of the current sample data of each candidate wireless access point is greater than its corresponding preset threshold. If so, determine that the signal quality of the candidate wireless access point is high. To determine whether only one pending wireless access point has a high signal quality, If so, select the undetermined wireless access point with high signal quality for access.

3. The method according to claim 2, characterized in that, When it is determined that there is more than one candidate wireless access point with high signal quality, the method further includes: Obtain the occupancy data of the channel where each pending wireless access point is located, the occupancy data including adjacent channel interference data and co-channel interference data; Determine if there is a pending wireless access point with less occupied data than the other. If so, select the undetermined wireless access point with the smallest data usage for access; If not, select a 5G frequency band wireless access point for access.

4. The method according to claim 2, characterized in that, When it is determined that there are no two pending wireless access points, the method further includes: Determine if there are any pending wireless access points. If there are pending wireless access points, determine whether the average value of the current sample data of the pending wireless access points is greater than the corresponding preset threshold. If yes, select the pending wireless access point for access; if no, select another wireless access point other than the pending wireless access point for access.

5. The method according to claim 4, characterized in that, When it is determined that there is no pending wireless access point, the method further includes: Obtain the channel occupancy data for each wireless access point, including adjacent channel interference data and co-channel interference data; Determine if there is a wireless access point with less data usage than the other. If so, select the wireless access point to access the network; If not, select a 5G frequency band wireless access point for access.

6. A device for a dual-band Wi-Fi terminal to select a wireless access point, used for the dual-band Wi-Fi terminal to select one wireless access point from two frequency bands, 5G and 2.4G, for access, characterized in that, include: The data acquisition module is used to continuously collect signal strength data from each wireless access point; The command monitoring module is used to monitor whether an access command has been received. The overall distribution construction module is used to construct the current overall signal strength distribution of each wireless access point by using the signal strength data of each wireless access point within a first preset time period when an access command is received. The end time of the first preset time period is the current time. The current sample data acquisition module is used to take the signal strength data of each wireless access point within a second preset time period as the current sample data of the corresponding wireless access point. The end time of the second preset time period is the current time, and the duration of the second preset time period is less than the duration of the first preset time period. The average value calculation module is used to calculate the average value of the current sample data for each wireless access point. The judgment module is used to determine, using a t-test, whether the average value of the current sample data from two wireless access points has a significant difference at a preset level. The access module is used to select the wireless access point whose average value is significantly greater than the other when the average value of the current sample data of two wireless access points is significantly different at a preset level. The access module is also used to select a wireless access point for access based on the t-test method, according to the overall distribution of the current signal strength of each wireless access point and the current sample data, when the average value of the current sample data of the two wireless access points does not have a significant difference at a preset level.

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