CN113473380A

CN113473380A - Client track identification method and distributed wireless network system

Info

Publication number: CN113473380A
Application number: CN202110520546.XA
Authority: CN
Inventors: 周泳; 郭东亚; 高华辰
Original assignee: Yichen Shenzhen Technology Co ltd
Current assignee: Yichen Shenzhen Technology Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-10-01
Anticipated expiration: 2041-05-13
Also published as: CN113473380B

Abstract

The invention relates to the technical field of wireless network communication, in particular to a client track identification method and a distributed wireless network system. The method comprises the steps that a wireless controller sends signal detection instructions to each wireless access point at a plurality of different moments in a preset detection window period, each wireless access point detects wireless signal indexes of each client aiming at the wireless access points in the extended service set according to the signal detection instructions and feeds the wireless signal indexes back to the wireless controller, and finally the wireless controller analyzes and obtains the moving track of each client according to the wireless signal indexes of each client aiming at each wireless access point at the plurality of different moments. On the premise of identifying the movement track of the client in advance, the invention determines a better wireless access point to start the authentication mode aiming at the client in advance based on the movement track, thereby realizing seamless roaming aiming at the client and improving the network use experience of a user.

Description

Client track identification method and distributed wireless network system

Technical Field

The invention relates to the technical field of wireless network communication, in particular to a client track identification method and a distributed wireless network system.

Background

With the continuous development of wireless network technology, a new generation of wireless network technology (such as WiFi 6) has the characteristics of high speed, multiple users, high efficiency and the like, and has a wide application prospect in the field of industry, such as wide application in industrial parks, office buildings, markets, hospitals, airports, factories and other environments. In a distributed wireless networking environment based on new generation wireless networking technologies, each access point may allow more clients to join. In the networking environment based on the distributed wireless network, a Basic Service Set (BSS) is formed by the same wireless Access Point (AP) and a client accessing the wireless access point, and an Extended Service Set (ESS) is formed by different basic service sets having the same Service Set Identification (SSID). In a practical application scenario, each client typically moves dynamically within a range covered by the extended service set in the wireless networking environment. In a conventional wireless network service mode, when a client moves from a signal coverage of one basic service set to a signal coverage of another basic service set, generally when a signal of a previous basic service set cannot be connected or is lower than a preset signal index threshold, a wireless access point authentication mode of another basic service set is started again, so that the client can access a wireless signal provided by a wireless access point of another basic service set. In this way, the client cannot be timely migrated to the appropriate wireless access point, so that the wireless access point connected before may have a poor wireless signal index for the client, which may affect the wireless network quality of the client, and further affect the user experience.

Disclosure of Invention

Based on the above problem, an embodiment of the present invention provides a client trajectory identification method, which is applied to a distributed wireless network system, where the distributed wireless network system includes a wireless controller and a plurality of wireless access points communicatively connected to the wireless controller, where each wireless access point forms a basic service set with a client accessing the wireless access point, and a plurality of the basic service sets have the same service set identifier to form an extended service set, where the method includes:

the wireless controller respectively sends signal detection instructions to the wireless access points at a plurality of different moments in a preset detection window period;

the wireless access point detects wireless signal indexes of the clients in the extended service set aiming at the wireless access point according to the signal detection instruction and feeds the wireless signal indexes back to the wireless controller;

and the wireless controller analyzes and obtains the moving track of each client according to the wireless signal indexes of each client aiming at each wireless access point at the different moments.

Preferably, the analyzing, by the wireless controller, the movement trajectory of each client according to the wireless signal indicator of each client at the multiple different time instants respectively includes:

acquiring wireless signal index increment of the client aiming at each wireless access point, and acquiring the wireless access point corresponding to the largest wireless signal index increment as a target wireless access point; acquiring the position of an original client of the client before the detection window period and the position of the target wireless access point; obtaining the moving track of the client according to the position of the original client and the position of the target wireless access point; or

For each wireless access point, acquiring the index variation of the client for the wireless signal index of the wireless access point at each moment compared with the index variation of the wireless signal index of the wireless access point at the previous moment, and obtaining an index variation sequence for each wireless access point; obtaining a wireless signal index change curve of the client aiming at each wireless access point according to the index change sequence of the client aiming at each wireless access point; obtaining the moving track of each client according to the wireless signal index change curve of each client aiming at each wireless access point; or

Acquiring wireless signal index increment of the client aiming at each wireless access point, and sequencing the wireless access points according to the wireless signal index increment from large to small; selecting a preset number of wireless access points with larger wireless signal index increment as target wireless access points according to the sorting result; acquiring the position of an original client of the client before the detection window period; and obtaining the position of each target wireless access point, and obtaining the movement track of the client according to the position of the original client and the position of each target wireless access point, wherein the movement track comprises the position of the original client and the position of each target wireless access point.

Preferably, the obtaining a moving track of the client according to a wireless signal index variation curve of the client for each wireless access point includes:

determining whether a continuous increase curve of continuous increase of wireless signal indexes exists in a plurality of wireless signal index change curves of the client aiming at each wireless access point;

if a continuous growth curve for continuously increasing the wireless signal index exists, when the number of the continuous growth curves is 1, taking the continuous growth curve as a target curve, when the number of the continuous growth curves is more than 1, calculating the average variation of index variation respectively corresponding to each moment in each continuous growth curve, and taking the continuous growth curve corresponding to the maximum average variation obtained by calculation as the target curve;

if no continuous increasing curve of the wireless signal index continuous increasing exists, calculating the number of moments when the corresponding index variation is positive in each wireless signal index variation curve, and taking the wireless signal index variation curve with the largest number of moments when the index variation is positive as a target curve;

and obtaining the movement track of the client according to the position of the wireless access point corresponding to the target curve and the position of the client before the detection window period.

Preferably, the method further comprises:

the wireless controller judges whether the wireless signal index of the client aiming at the currently accessed wireless access point is reduced to a set threshold value;

when the current access point is lowered to the set threshold value, the wireless controller selects one wireless access point as a wireless access point to be accessed according to the movement track, and starts an authentication mode of the wireless access point to be accessed for the client, so that the client can roam from the currently accessed wireless access point to the wireless access point to be accessed;

when the client passes the authentication of the wireless access point to be accessed, the wireless controller deletes the client from the basic service set where the currently accessed wireless access point is located, and adds the client to the basic service set corresponding to the wireless access point to be accessed.

Preferably, the method further comprises:

the wireless controller obtains a client distribution thermodynamic prediction graph in the extended service set according to the movement track of each client, wherein the client distribution thermodynamic prediction graph comprises a plurality of wireless access point nodes and a client distribution thermodynamic parameter prediction value on each wireless access point node;

performing channel resource allocation and interference suppression on each wireless access point in the extended service set according to the client distribution thermal prediction graph; wherein the allocating channel resources and suppressing interference to each wireless access point in the extended service set specifically include:

setting priority parameters for each wireless access point according to the client distribution thermodynamic parameter prediction values corresponding to each wireless access point, and then performing channel resource allocation for each wireless access point according to the priority parameters corresponding to each wireless access point, wherein the larger the priority parameter is, the more the allocated channel resources are;

and selecting at least one target wireless access point according to the priority parameter of each wireless access point, and allocating an independent channel to the at least one target wireless access point or allocating a set channel to the target wireless access point so as to perform interference suppression on the target wireless access point.

Preferably, the method further comprises the following steps performed by the wireless controller:

after the preset detection window period is over, sequentially polling each wireless access point in the extended service set to obtain the number of currently accessed clients of each wireless access point and the traffic load data of the currently accessed clients;

generating a load distribution thermodynamic diagram of each wireless access point in the extended service set according to the number of clients currently accessed by each wireless access point and the traffic load data of each currently accessed client, wherein the load distribution thermodynamic diagram comprises wireless access point nodes in the extended service set and current load conditions corresponding to each wireless access point node;

acquiring a first wireless access point of which the current load reaches a preset load threshold value in the extended service set according to the load distribution thermodynamic diagram;

acquiring a second wireless access point of which the predicted value of the client distribution thermal parameter in the extended service set is lower than a preset thermal parameter threshold according to the client distribution thermal prediction graph;

acquiring a client which is accessed to the first wireless access point and is simultaneously positioned in the wireless signal coverage range of the first wireless access point and the second wireless access point as a client to be adjusted;

acquiring wireless signal indexes of each client to be adjusted respectively aiming at the first wireless access point and the second wireless access point through the first wireless access point and the second wireless access point, and taking the client to be adjusted with the wireless signal index aiming at the second wireless access point larger than that aiming at the first wireless access point as a target client to be adjusted;

starting an authentication mode of the second wireless access point for the target client to be adjusted so as to roam the target client to be adjusted from the first wireless access point to the second wireless access point, and realizing load balancing adjustment of the first wireless access point;

after the target client to be adjusted is accessed to the second wireless access point, deleting the target client to be adjusted from the basic service set corresponding to the first wireless access point, and adding the target client to be adjusted to the basic service set corresponding to the second wireless access point.

Preferably, the extended service set comprises three or more wireless access points, and the method further comprises the following steps performed by the wireless controller:

polling the wireless access points for each client to obtain three wireless access points with the best wireless signal indexes provided for the client;

judging whether the client has any wireless access point accessed into the extended service set currently;

if the client does not access any wireless access point in the extended service set currently, determining one of the three wireless access points which is matched with the movement track as an authentication wireless access point according to the movement track of the client, starting an authentication mode of the authentication wireless access point for the client to access the client to the authentication wireless access point, and adding the client to a basic service set corresponding to the authentication wireless access point after the client accesses the authentication wireless access point;

if the client side has access to one wireless access point in the extended service set, judging whether the wireless access point which the client side has access to is one of the three wireless access points, if the wireless access point which the client side has access to is not one of the three wireless access points, when the wireless signal index of the wireless access point which the client side has access to is reduced to a set threshold value, determining one of the three wireless access points which is matched with the moving track as an authentication wireless access point, starting an authentication mode of the authentication wireless access point for the client side to access the client side to the authentication wireless access point, and after the client side has access to the authentication wireless access point, adding the client side into a basic service set corresponding to the authentication wireless access point and enabling the client side to access from the wireless access point which the client side has access to before Is deleted in the basic service set.

Further, an embodiment of the present invention further provides a distributed wireless network system, including a wireless controller and a plurality of wireless access points in communication connection with the wireless controller, where each of the wireless access points forms a basic service set with a client accessing the wireless access point, and a plurality of the basic service sets have the same service set identifier to form an extended service set, where:

the wireless controller is used for respectively sending a signal detection instruction to each wireless access point at a plurality of different moments in a preset detection window period;

the wireless access point is used for detecting wireless signal indexes of the clients in the extended service set aiming at the wireless access point according to the signal detection instruction and feeding back the wireless signal indexes to the wireless controller;

the wireless controller is further configured to analyze a movement track of each client according to a wireless signal indicator of each client at the plurality of different times for each wireless access point.

Preferably, the wireless controller is further configured to:

judging whether the wireless signal index of the client aiming at the currently accessed wireless access point is reduced to a set threshold value;

when the current access point is lowered to the set threshold value, selecting one wireless access point as a wireless access point to be accessed according to the movement track, and starting an authentication mode of the wireless access point to be accessed for the client so as to roam the client from the currently accessed wireless access point to the wireless access point to be accessed;

and when the client passes the authentication of the wireless access point to be accessed, deleting the client from the basic service set where the currently accessed wireless access point is located, and adding the client to the basic service set corresponding to the wireless access point to be accessed.

In summary, in the client trajectory identification method and the distributed wireless network system provided in the embodiments of the present invention, a wireless controller sends a signal detection instruction to each wireless access point at a plurality of different times in a preset detection window period, so that each wireless access point detects wireless signal indicators of each client in the extended service set for the wireless access points according to the signal detection instruction and feeds the wireless signal indicators back to the wireless controller, and finally, the wireless controller analyzes the movement trajectory of each client according to the wireless signal indicators of each client for each wireless access point at the plurality of different times. Therefore, on the premise that the movement track of the client is identified in advance, the authentication mode for the client can be started in advance by a better wireless access point which is determined in advance based on the movement track, so that seamless roaming for the client is realized, and the network use experience of a user is improved.

In addition, the distribution heat power of the client in the extended service set can be predicted according to the moving track to obtain a client distribution heat power prediction graph, and then the signal resource and the interference suppression of the extended service set can be predefined according to the client distribution heat power prediction graph, so that the wireless access points with more client distribution or larger client load can obtain better channel resource and better interference suppression effect, the service quality of the corresponding wireless access points is improved, and the reduction of the network service quality caused by more clients and larger load is avoided.

Furthermore, the second wireless access point with lower load (corresponding to the intersection of the distribution thermal parameters of the clients) can be used for carrying out load sharing on the first wireless access point with higher load in the distributed wireless network system according to the movement track of each client, so that the load balance of the whole system is realized, and the wireless network service quality of the whole system is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram of a distributed wireless network system according to an embodiment of the present invention.

Fig. 2 is a schematic flowchart of a client track identification method according to an embodiment of the present invention.

Fig. 3 is a flow diagram illustrating sub-steps of one implementation of step S300 in fig. 2.

Fig. 4 is a schematic flowchart of steps included in the client identifying method according to the embodiment of the present invention.

Detailed Description

Please refer to fig. 1, which is a diagram illustrating a distributed wireless network system 10 according to an embodiment of the present invention. The system includes a wireless controller (AC) 100 and a plurality of wireless Access Points (APs) 200 communicatively coupled to the AC 100. The wireless controller 100 is a network device, and can be communicatively connected to each of the wireless access points 200 through a gateway device 400 such as a switch or a router. The wireless access point 200 may access the network (Internet) through a gateway device 400 disposed between the wireless controller 100 and the wireless access point 200, thereby providing wireless network services to each client 300 accessing the wireless access point 200. The clients 300 accessing the wireless access points 200 may be, but are not limited to, any communication device with network communication capability, such as a notebook computer, a smart phone, a wearable wireless communication device, a personal computer, and the like. In this embodiment, the distributed wireless network system 10 may be a wireless network system built based on a sixth generation wireless network technology (WiFi 6), or may be a wireless network system built based on a fifth generation wireless network technology (WiFi 5), and this embodiment is not limited specifically.

Further, in this embodiment, in the distributed wireless network system 10, each wireless access point 200 and the client 300 accessing the wireless access point 200 form a Basic Service Set (BSS), and a plurality of the basic service sets have the same Service Set Identification (SSID) to form an Extended Service Set (ESS).

In this embodiment, the distributed wireless network system 10 may identify or predict the movement track of each client in the extended service set, so as to be used for performing corresponding control and management on each wireless access point 200 in the distributed wireless network system according to the movement track of each client, so as to improve the wireless network service quality of the entire system and improve the user experience, and the detailed method will be described in detail below.

First, the wireless controller 100 may send a signal detection instruction to each of the wireless access points 200 at a plurality of different times in a preset detection window period, so that each of the wireless access points 200 detects a wireless signal indicator of each of the clients 300 in the extended service set for the wireless access point. In this embodiment, the wireless Signal indicator may include at least one of Received Signal Strength (RSSI), Signal-to-Noise Ratio (SNR), and Link Quality Indication (LQI). In this embodiment, the wireless signal indicator is preferably RSSI. In this embodiment, the detection window period may be a set time period, detection may be started once after every set time, and the set time period after detection is started may be understood as a detection window period.

When receiving the signal detection instruction, the wireless access point 200 detects a wireless signal indicator of each client 300 in the extended service set for the wireless access point 200 according to the signal detection instruction, and feeds the wireless signal indicator back to the wireless controller 100.

After receiving the wireless signal indicators fed back by each of the wireless access points 200, the wireless controller 100 analyzes the movement trajectory of each of the clients 300 according to the wireless signal indicators of each of the clients 300 at the different times for each of the wireless access points 200, so as to perform subsequent applications.

In detail, in an implementation manner, for each client 300, the wireless controller 100 may analyze, to obtain a movement trajectory of the client 300, according to a change of the wireless signal indicator of the client 300 for each wireless access point 200 at the plurality of different times.

For example, in a first possible implementation, the wireless controller 100 may obtain the wireless signal indicator increment of the client 300 for each wireless access point 200, and obtain the wireless access point 200 corresponding to the largest wireless signal indicator increment as a target wireless access point. Then, the original client position of the client 300 before the detection window period and the position of the target wireless access point are obtained, and the movement track of the client 300 is obtained according to the original client position and the position of the target wireless access point. For example, the movement trajectory may include a movement trajectory with the original client position as a starting point and the position of the target wireless access point as an ending point.

In a second possible implementation, for each wireless access point 200, the wireless controller 100 may obtain an index variation amount of each client 300 for the wireless signal index of the wireless access point 200 at each time compared to a previous time, to obtain an index variation sequence for each wireless access point 200; then, according to the index change sequence of the client 300 for each wireless access point 200, obtaining a wireless signal index change curve of the client 300 for each wireless access point 200; finally, the movement track of the client 300 is obtained according to the wireless signal index variation curve of each client 300 for each wireless access point.

For example, the moving track of the client 300 is obtained according to the wireless signal index variation curve of each client 300 for each wireless access point 200, and a possible implementation scheme is as follows.

First, it is determined whether there is a continuous increase curve of the wireless signal index continuously increasing in a plurality of wireless signal index variation curves of the client 300 for each of the wireless access points 200. In this embodiment, if the index variation amount corresponding to each time is positive, it indicates that the wireless signal index of the corresponding index variation curve is continuously increasing.

If a continuous increasing curve of continuous increasing of wireless signal indexes exists, when the number of the continuous increasing curves is 1, taking the continuous increasing curve as a target curve; and when the number of the continuous growth curves is more than 1, calculating the average variation of the index variation corresponding to each moment in each continuous growth curve, and taking the continuous growth curve corresponding to the maximum average variation obtained by calculation as a target curve.

And if no continuous increasing curve of the wireless signal index continuously increases exists, calculating the number of times of which the corresponding index variation is positive in each wireless signal index variation curve, and taking the wireless signal index variation curve with the largest number of times of which the index variation is positive as a target curve.

Finally, the movement track of the client 300 is obtained according to the position of the wireless access point corresponding to the target curve and the position of the client 300 before the detection window period. In this way, the movement trajectory of the client 300 can be obtained from the index variation trend of the wireless signal index of the client 300 for each wireless access point at a plurality of time points. For example, one wireless access point 200 with a positive index variation trend and a maximum variation amount of the wireless signal index is used as the moving direction of the moving track of the client 300.

In this embodiment, in a third possible implementation scheme, the wireless controller 100 may obtain a wireless signal index increment of each wireless access point for the client, and sequence the wireless access points in a descending order according to the wireless signal index increment; then, selecting a preset number of wireless access points with larger wireless signal index increment as target wireless access points according to the sorting result; and finally, acquiring the position of the original client before the detection window period of the client and the positions of the target wireless access points, and obtaining the movement track of the client 300 according to the position of the original client and the positions of the target wireless access points. For example, in this embodiment, the movement trajectory may include the original client position and the position of each target wireless access point. As such, the movement track of the client 300 is a track moving towards the position of the target wireless access point, and the movement track obtained in this way has a wider range.

After the movement track of the client 300 is obtained, the embodiment of the present invention may further perform subsequent applications according to the movement track, so as to improve the overall wireless network service quality of the distributed wireless network system 10. In detail, on this basis, the wireless controller 100 may determine whether the variation of the wireless signal indicator of the client 300 with respect to the currently accessed wireless access point 200 is reduced to a set threshold, for example, the wireless signal indicator is reduced to a certain degree, so that the network quality of the client 300 is degraded. In this way, when the threshold value is decreased to the set threshold value, the wireless controller 100 selects one of the wireless access points 200 as a wireless access point to be accessed according to the movement track, and starts an authentication mode of the wireless access point to be accessed for the client, so as to roam the client 300 from the currently accessed wireless access point to the wireless access point to be accessed. Then, when the client 300 passes the authentication of the wireless access point to be accessed, the wireless controller 100 deletes the client 300 from the basic service set where the currently accessed wireless access point is located, and adds the client to the basic service set corresponding to the wireless access point to be accessed. Accordingly, when the movement track of each client 300 is predicted in advance, which wireless access point or wireless access points 200 each client 300 moves towards can be determined according to the movement track, and accordingly, when the signal quality of the wireless access point 200 previously accessed by the client 300 is deteriorated, the client 300 can be directly roamed to the corresponding wireless access point with better quality currently moved, so that the client 300 cannot cause the deterioration of the wireless network service quality due to the change of the position, and meanwhile, the seamless roaming of the client 300 is not sensible to the client, and further, the client experience is improved. In this embodiment, the selected wireless access point to be accessed may be the wireless access point 200 corresponding to the end point position included in the movement track, and may be specifically selected according to an actual situation.

Further, in another subsequent application based on the movement trajectory in the embodiment of the present invention, the wireless controller 100 may further obtain a client distribution thermal power prediction graph in the extended service set according to the movement trajectory of each client 300, where the client distribution thermal power prediction graph may include a plurality of wireless access point nodes and a client distribution thermal power parameter prediction value on each wireless access point node. The client distribution thermal parameter prediction value may be a sum of the number of currently accessed clients 300 on the corresponding wireless access point node and the number of clients 300 predicted to roam to the corresponding wireless access point node according to the movement track. For example, for each moving track of the client 300, the moving track may include a start position and an end position, and the end position may represent a position of a wireless access point node to which the client 300 will roam, based on which, the number of clients 300 that will roam or may roam to the wireless access point node may be predicted, and further, a predicted value of the client distribution thermal parameter on each wireless access point node may be obtained.

Next, the wireless controller 100 may perform channel resource allocation and interference suppression on each wireless access point 200 in the extended service set according to the client distribution thermal prediction graph. Performing channel resource allocation and interference suppression on each wireless access point 200 in the extended service set specifically includes:

setting priority parameters for each wireless access point 200 according to the client distribution thermal parameter predicted value corresponding to each wireless access point 200, for example, the priority parameter corresponding to the wireless access point 200 with a larger client distribution human parameter predicted value is larger;

then, channel resources are allocated to each wireless access point 200 according to the priority parameter corresponding to each wireless access point 200, and the larger the priority parameter is, the more channel resources are allocated;

finally, according to the priority parameter of each wireless access point 200, at least one target wireless access point is selected, and an independent channel is allocated to the at least one target wireless access point or a set channel is allocated to the target wireless access point, so as to perform interference suppression on the target wireless access point. For example, based on the 802.11 protocol, two independent frequency bands, 2.4GHz and 4.9/5.8 GHz, are divided. Each frequency band is divided into a number of channels. For example, the 2.4GHz band corresponds to 14 channels, and the 5.8GHz band corresponds to 4 channels. In 14 channels corresponding to the 2.4GHz band, three channels 1, 6, and 11 do not interfere with each other, and then the three channels may be respectively allocated to the target wireless access point for independent use. Therefore, the wireless access points with more client distribution can preferentially use better channel resources and have better interference suppression mode, so that the wireless network service quality of the whole system can be guaranteed. It should be noted that the above examples are merely illustrative and do not limit the embodiments of the present invention. In this embodiment, any channel resource allocation and interference suppression method that can improve the wireless network service quality of the entire system and perform based on the priority parameter should be included in the protection scope of the embodiments of the present invention.

Further, in the embodiment of the present invention, on the basis of the above, in a preferred implementation manner, the following (1) to (8) performed by the wireless controller 100 may be further included in the subsequent application of the movement trajectory.

(1) After the preset detection window period elapses, each wireless access point 200 in the extended service set is sequentially polled to obtain the number of currently accessed clients of each wireless access point 200 and traffic load data of currently accessed clients 300.

(2) And generating a load distribution thermodynamic diagram of each wireless access point in the extended service set according to the number of currently accessed clients of each wireless access point 200 and the traffic load data of each currently accessed client 300, where the load distribution thermodynamic diagram includes wireless access point nodes in the extended service set and current load conditions corresponding to each wireless access point node. Wherein the wireless access point node represents a corresponding wireless access point 200.

(3) And acquiring a first wireless access point of which the current load reaches a preset load threshold value in the extended service set according to the load distribution thermodynamic diagram.

(4) And acquiring a second wireless access point of which the predicted value of the client distribution thermal parameter in the extended service set is lower than a preset thermal parameter threshold according to the client distribution thermal prediction graph.

(5) And acquiring a client 300 which is accessed to the first wireless access point and is simultaneously positioned in the wireless signal coverage range of the first wireless access point and the second wireless access point as a client to be adjusted.

(6) And acquiring wireless signal indexes of each client to be adjusted respectively aiming at the first wireless access point and the second wireless access point through the first wireless access point and the second wireless access point, and taking the client to be adjusted with the wireless signal index aiming at the second wireless access point larger than that aiming at the first wireless access point as a target client to be adjusted.

(7) And starting an authentication mode of the second wireless access point for the target client to be adjusted so as to roam the target client to be adjusted from the first wireless access point to the second wireless access point, thereby realizing load balancing adjustment of the first wireless access point.

(8) After the target client to be adjusted is accessed to the second wireless access point, deleting the target client to be adjusted from the basic service set corresponding to the first wireless access point, and adding the target client to be adjusted to the basic service set corresponding to the second wireless access point.

Based on the above, the second wireless access point with a lower load (at the bottom of the distribution thermal parameters of the corresponding client) can be further used to share the load of the first wireless access point with a higher load in the distributed wireless network system 10 according to the movement track of each client 300, so as to achieve load balancing of the whole system and improve the wireless network service quality of the whole system.

Further, in an embodiment of the present invention, in a preferred implementation manner, the extended service set may include three or more wireless access points, and based on this, the following content executed by the wireless controller 100 may also be included for the subsequent application of the movement trajectory.

First, for each client 300, polling each wireless access point 200, and obtaining the three wireless access points 200 with the best wireless signal indexes provided by the client 300. For example, one of the three wireless access points with the best wireless signal indicator may be the main access point (e.g., labeled as AP 1), and the other two may be the standby access points (e.g., labeled as AP2 and AP 3).

Then, it is determined whether the client 300 has any wireless access point 200 currently accessing the extended service set.

Then, if the client 300 does not access any wireless access point in the extended service set currently, according to the movement track of the client 300, determining one of the three wireless access points 200 that matches the movement track as an authentication wireless access point, starting an authentication mode of the authentication wireless access point for the client, so as to access the client 300 to the authentication wireless access point, and after the client 300 accesses the authentication wireless access point, adding the client 300 to a basic service set corresponding to the authentication wireless access point and deleting the client 300 from a basic service set corresponding to a previously accessed wireless access point 200.

Then, if the client 300 has currently accessed one wireless access point in the extended service set, it is determined whether the wireless access point 200 currently accessed by the client 300 is one of the three wireless access points 200, if the wireless access point 200 currently accessed by the client 300 is not one of the three wireless access points 200, when the wireless signal index of the wireless access point 200 currently accessed to the client 300 is reduced to a set threshold, it is determined that one of the three wireless access points 200 matched with the movement trajectory is used as an authentication wireless access point, an authentication mode of the authentication wireless access point to the client 300 is started, so as to access the client 300 to the authentication wireless access point, and after the client 300 accesses the authentication wireless access point, adding the client 300 into the basic service set corresponding to the authentication wireless access point and deleting the client 300 from the basic service set corresponding to the wireless access point 200 accessed before.

In this embodiment, one of the three wireless access points 200 closest to the end point of the movement trajectory may be used as the authentication wireless access point according to the movement trajectory.

Fig. 2 is a schematic flow chart of a client track identification method according to an embodiment of the present invention, where the client track identification method is executed by each device in the distributed wireless network system 10 in this embodiment, which will be described in detail below.

Step S100, the wireless controller sends a signal detection instruction to each of the wireless access points at a plurality of different times in a preset detection window period.

And step S200, the wireless access point detects wireless signal indexes of the clients in the extended service set aiming at the wireless access point according to the signal detection instruction and feeds the wireless signal indexes back to the wireless controller.

Step S300, the wireless controller analyzes and obtains a movement trajectory of each client according to the wireless signal indicator of each client at the plurality of different times for each wireless access point.

In the embodiment of the present invention, the step S300 may be implemented in any one of the following three manners.

In a first mode, acquiring a wireless signal index increment of the client aiming at each wireless access point, and acquiring a wireless access point corresponding to the largest wireless signal index increment as a target wireless access point; acquiring the position of an original client of the client before the detection window period and the position of the target wireless access point; and obtaining the moving track of the client according to the position of the original client and the position of the target wireless access point.

In a second mode, for each wireless access point, acquiring an index variation amount of each client for a wireless signal index of the wireless access point at each moment compared with that at the previous moment, and obtaining an index variation sequence for each wireless access point; obtaining a wireless signal index change curve of the client aiming at each wireless access point according to the index change sequence of the client aiming at each wireless access point; and obtaining the moving track of the client according to the wireless signal index change curve of each client aiming at each wireless access point.

In a third mode, acquiring a wireless signal index increment of the client aiming at each wireless access point, and sequencing the wireless access points according to the wireless signal index increment from large to small; selecting a preset number of wireless access points with larger wireless signal index increment as target wireless access points according to the sorting result; acquiring the position of an original client of the client before the detection window period; and obtaining the position of each target wireless access point, and obtaining the movement track of the client according to the position of the original client and the position of each target wireless access point, wherein the movement track comprises the position of the original client and the position of each target wireless access point. The wireless signal index increment can be a positive value or a negative value, the positive value indicates that the wireless signal index is getting better, and the negative value indicates that the wireless signal index is getting worse.

In the second embodiment, as shown in fig. 3, the obtaining of the movement locus of the client according to the wireless signal index variation curve of the client for each wireless access point may be implemented by the following substeps S301 to S304.

A substep S301, determining whether there is a continuous increase curve of continuous increase of wireless signal index in a plurality of wireless signal index change curves of the client for each wireless access point.

In the substep S302, if there is a continuous growth curve in which the wireless signal indicator continuously grows, when the number of the continuous growth curves is 1, the continuous growth curve is taken as a target curve, when the number of the continuous growth curves is greater than 1, an average variation amount of the indicator variation amount corresponding to each time in each continuous growth curve is calculated, and the continuous growth curve corresponding to the calculated maximum average variation amount is taken as the target curve, and then the process proceeds to the step S304.

In the sub-step S303, if there is no continuous increase curve in which the wireless signal indicator continuously increases, the number of times at which the corresponding indicator variation is positive in each wireless signal indicator variation curve is calculated, and the wireless signal indicator variation curve with the largest number of times at which the indicator variation is positive is set as the target curve, and then the process proceeds to the step S304.

And a substep S304, obtaining a movement trajectory of the client according to the position of the wireless access point corresponding to the target curve and the position of the client before the detection window period.

On the basis of the above, please refer to fig. 4, the embodiment of the present invention may further include the following steps:

in step S400, the wireless controller determines whether the wireless signal indicator of the client for the currently accessed wireless access point is reduced to a set threshold.

Step S500, when the set threshold value is reduced, the wireless controller selects one wireless access point as a wireless access point to be accessed according to the moving track, and starts an authentication mode of the wireless access point to be accessed for the client, so as to roam the client from the currently accessed wireless access point to the wireless access point to be accessed.

Step S600, when the client passes the authentication of the wireless access point to be accessed, the wireless controller deletes the client from the basic service set where the currently accessed wireless access point is located, and adds the client to the basic service set corresponding to the wireless access point to be accessed.

Further, based on the subsequent application of the movement trajectory, the method provided by the embodiment of the present invention may further include the following steps:

and the wireless controller performs channel resource allocation and interference suppression on each wireless access point in the extended service set according to the client distributed thermal prediction graph.

Wherein the allocating channel resources and suppressing interference to each wireless access point in the extended service set specifically include:

firstly, setting priority parameters for each wireless access point according to the client distribution thermodynamic parameter prediction values corresponding to each wireless access point, and then performing channel resource allocation for each wireless access point according to the priority parameters corresponding to each wireless access point, wherein the larger the priority parameter is, the more the allocated channel resources are;

then, according to the priority parameter of each wireless access point, at least one target wireless access point is selected, and an independent channel is allocated to the at least one target wireless access point or a set channel is allocated to the target wireless access point, so as to perform interference suppression on the target wireless access point.

On the basis of the above, the method may further include the following steps (1) to (8) performed by the radio controller:

(1) and after the preset detection window period is over, sequentially polling each wireless access point in the extended service set to obtain the number of currently accessed clients of each wireless access point and the traffic load data of the currently accessed clients.

(2) And generating a load distribution thermodynamic diagram of each wireless access point in the extended service set according to the number of currently accessed clients of each wireless access point and the traffic load data of the currently accessed clients, wherein the load distribution thermodynamic diagram comprises wireless access point nodes in the extended service set and current load conditions corresponding to the wireless access point nodes.

(5) And acquiring a client which is accessed to the first wireless access point and is simultaneously positioned in the wireless signal coverage range of the first wireless access point and the second wireless access point as a client to be adjusted.

Still further, the extended service set may include three or more wireless access points, and based on this, the method may further include the following steps performed by the wireless controller:

firstly, polling each wireless access point aiming at each client side to obtain three wireless access points which provide the best wireless signal indexes aiming at the client side;

then, judging whether the client has any wireless access point accessed into the extended service set at present;

then, if the client does not access any wireless access point in the extended service set currently, determining one of the three wireless access points which is matched with the movement track as an authentication wireless access point according to the movement track of the client, starting an authentication mode of the authentication wireless access point for the client to access the client to the authentication wireless access point, and adding the client to a basic service set corresponding to the authentication wireless access point after the client accesses the authentication wireless access point;

finally, if the client has currently accessed one wireless access point in the extended service set, determining whether the currently accessed wireless access point of the client is one of the three wireless access points, if the currently accessed wireless access point of the client is not one of the three wireless access points, determining one of the three wireless access points which is matched with the moving track as an authentication wireless access point when the variation of the currently accessed wireless access point for the wireless signal index of the client reaches a preset threshold value, starting an authentication mode of the authentication wireless access point for the client to access the client to the authentication wireless access point, and after the client accesses the authentication wireless access point, adding the client into a basic service set corresponding to the authentication wireless access point and enabling the client to access the authentication wireless access point from the previous time without the client And deleting the basic service set corresponding to the line access point.

It should be noted that the client track identification method provided in the embodiment of the present invention is implemented by each component in the distributed wireless network system 10 shown in fig. 1, and for specific implementation of each step of the method, reference may be made to the detailed description of each component in fig. 1, which is not repeated here by way of enumeration.

The embodiments described above are only a part of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention generally described and illustrated in the figures can be arranged and designed in a wide variety of different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention, but is merely representative of selected embodiments of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. Moreover, all other embodiments that can be made available by a person skilled in the art without inventive step based on the embodiments of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A client track recognition method is applied to a distributed wireless network system, the distributed wireless network system comprises a wireless controller and a plurality of wireless access points which are in communication connection with the wireless controller, wherein each wireless access point and a client accessing the wireless access point form a basic service set, and a plurality of basic service sets have the same service set identification to form an extended service set, and the method comprises the following steps:

the wireless controller analyzes and obtains the moving track of each client according to the wireless signal indexes of each client aiming at each wireless access point at the different moments;

the method for analyzing and obtaining the movement track of each client by the wireless controller according to the wireless signal indexes of each client at the different moments comprises the following steps:

2. The method according to claim 1, wherein obtaining a moving trajectory of the client according to a wireless signal indicator variation curve of the client for each wireless access point comprises:

3. The method according to claim 1 or 2, characterized in that the method further comprises:

4. The method according to claim 1 or 2, characterized in that the method further comprises:

5. The method according to claim 4, further comprising the following steps performed by the wireless controller:

6. The method of claim 1, wherein the extended service set comprises three or more wireless access points, and wherein the method further comprises the following steps performed by the wireless controller:

7. A distributed wireless network system, comprising a wireless controller and a plurality of wireless access points communicatively connected to the wireless controller, wherein each of the wireless access points forms a basic service set with a client accessing the wireless access point, and a plurality of the basic service sets have the same service set identifier to form an extended service set, and the system is characterized in that:

the wireless controller is further configured to analyze a movement track of each client according to wireless signal indexes of each client at the plurality of different times for each wireless access point;

8. The distributed wireless network system of claim 7, wherein the wireless controller is further configured to: