CN113873609B

CN113873609B - Method and AC for guiding client to access AP

Info

Publication number: CN113873609B
Application number: CN202111118261.XA
Authority: CN
Inventors: 吴清根
Original assignee: New H3C Technologies Co Ltd Chengdu Branch
Current assignee: New H3C Technologies Co Ltd Chengdu Branch
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2023-11-03
Anticipated expiration: 2041-09-24
Also published as: CN113873609A

Abstract

The specification provides a method and an AC for guiding a client to access an AP, the method comprising: and when the communication quality of the first client connected to the first AP is detected to reach a preset condition, acquiring a second AP connected to the first client before the first AP is connected, acquiring a target path table matched with the first AP and the second AP from a path library by taking the first AP and the second AP as indexes, further recording a history record of a third AP connected to the first client after the first AP is connected in the target path table, and transmitting the target path table to the first client so that the first client is connected to the third AP according to the target path table. By the method, the AC can guide the client to select the AP to be accessed.

Description

Method and AC for guiding client to access AP

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to a method and an AC for guiding a client to access an AP.

Background

WLAN (Wireless LAN) has been increasingly used, and the roaming experience of users on Wireless networks has been increasingly demanded, so that where a Wireless client can move, the Wireless client is required to roam to a nearby AP (Access Point).

The AC (Access Controller, centralized controller) centrally manages the APs. In the moving process, the wireless client actively identifies the network environment, discovers a new AP, and then accesses the new AP, and the whole roaming process belongs to the active behavior of the client. Wireless clients are various, different client manufacturers are realized, some manufacturers roam too sensitively to generate oscillation, and some roaming is too insensitive to cause roaming viscosity, namely, the roaming cannot be timely carried out to an AP with good signals, so that the experience is poor finally.

In order to solve the above problem, the wireless standard organization provides a method that an AC may actively request a terminal to switch, and the method 802.11v BTM (BSS Transition Management, BSS switch management) may send a message carrying a candidate access BSS (Basic Service Set ) list to a wireless client, and the wireless client receives the message and then selects to access to a suitable AP. When the AC detects that the communication quality of the wireless client is poor and the access position needs to be switched, the AC can interact with the wireless client through the mechanism.

When the AC cannot timely detect which APs can find the client for the current client to access, the AC cannot inform the client of switching to the proper AP; or the client does not support detection to provide the AC with a BSS list that the current location can scan for, and the AC has no data and cannot inform the client to switch to the appropriate AP.

Disclosure of Invention

The invention provides a method and an AC for guiding a client to access an AP, and the AC can guide the client to select the AP to be accessed through the method.

The embodiment of the disclosure provides a method for guiding a client to access an AP, which is applied to an AC, and comprises the following steps:

detecting the communication quality of a first client accessing a first AP;

when the communication quality of a first client reaches a preset condition, acquiring a second AP which is accessed by the first client before the first AP is accessed;

acquiring a target path table matched with the first AP and the second AP from a path library by taking the first AP and the second AP as indexes, wherein a history record of a third AP accessed by the first client after the first AP is accessed is recorded in the target path table;

and sending the target path table to the first client so that the first client accesses a third AP according to the target path table.

Optionally, the detecting the communication quality of the first client accessing the first AP includes:

the transmission rate of the first AP and the first client is detected and/or the signal strength between the first AP and the first client is detected.

Optionally, the preset condition includes: preset rate and/or preset signal strength.

Optionally, the method for determining that the communication quality of the first client reaches the preset condition includes: when the transmission rate of the first client and the first AP is detected to reach a preset rate, determining that the communication quality of the first client reaches a preset condition; and/or the number of the groups of groups,

and when the signal strength of the first client and the first AP is detected to reach the preset signal strength, determining that the communication quality of the first client reaches the preset condition.

Optionally, the sending the target path table to the first client includes:

and weighting the acquired access times, access time and load information of a third AP in the plurality of target path tables, and selecting the target path table according to the weighting result to send to the first client.

Optionally, the method for obtaining the path library comprises the following steps:

and sequentially recording the APs which are accessed by the clients according to the MAC addresses of the clients as indexes, and storing the recording results in a path library.

As can be seen from the above embodiments, when the AC detects that the communication quality of the client reaches the preset condition, the AC may send the target path table to the client, so that the client selects to access the third AP according to the target path table.

Embodiments of the present disclosure also provide an AC including:

the detection module is used for detecting the communication quality of a first client accessing the first AP;

the acquisition module is used for acquiring a second AP which is accessed by the first client before the first AP is accessed when the communication quality of the first client is detected to reach a preset condition;

the acquisition module is further configured to acquire a target path table matched with the first AP and the second AP from a path library by using the first AP and the second AP as indexes, where a history record of a third AP to which the first client is connected after the first AP is connected is recorded in the target path table;

and the sending module is used for sending the target path table to the first client so that the first client accesses the third AP according to the target path table.

Optionally, the detection module is specifically configured to detect a transmission rate between the first AP and the first client and/or detect a signal strength between the first AP and the first client.

Optionally, the detection module is specifically configured to determine that the communication quality of the first client reaches a preset condition when it is detected that the transmission rates of the first client and the first AP reach a preset rate; and/or the number of the groups of groups,

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a flowchart of a method for guiding a client to access an AP according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present description as detailed in the accompanying claims.

The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this specification to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present description. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

At present, an AC may send an authentication message to a client via an AP to which the client is accessing to notify the client that the client is offline, and the client needs to rediscover services, which may cause a flow terminal to have a longer time; meanwhile, the AP and the client have no cooperativity, the AP is convenient to interrupt connection, and the influence on the running service when the connection of the client is disconnected is large.

To solve the above technical problem, an embodiment of the present disclosure provides a method for guiding a client to access an AP, as shown in fig. 1, where the method is applied to an AC, and the method includes:

s101, detecting communication quality of a first client accessing a first AP;

s102, when detecting that the communication quality of a first client reaches a preset condition, acquiring a second AP which is accessed by the first client before accessing the first AP;

s103, acquiring a target path table matched with the first AP and the second AP from a path library by taking the first AP and the second AP as indexes, wherein a history record of a third AP accessed by the first client after accessing the first AP is recorded in the target path table;

and S104, the target path table is sent to the first client, so that the first client accesses a third AP according to the target path table.

In this embodiment, the AC device sequentially records APs that each client accesses historically, with the MAC address of each client as an index, and stores the recording result in the path library.

In one implementation, after the client accesses the AC, the AC calculates after each access of the client to the AP, and forms a directional access path record list from the previous access AP position, the current access AP position, and the next access AP position based on each client. And the access times of each path, the latest access time and the like can be counted.

In one example, the AC proceeds with a directed historical access path and statistics process as follows:

when a client accesses BSS1 on AC, the current access BSS1 index BSSID1 is recorded.

When the client terminal moves and switches to BSS2, access paths BSS1 (Previous) to BSS2 (Current) are formed according to the recorded Current access BSS index BSSID1, i.e. the Previous BSS index BSSID1.

Updating the index of the BSS which is accessed at present as BSSID2, and recording the index of the BSS which is accessed at the previous time as BSSID1.

When the client moves to the Next BSS, for example, switches to BSS3, the access path information is matched according to the recorded Previous access BSS index BSSID1 and the recorded Current access BSS index BSSID2, the Next access BSS information from BSS1 to BSS2 is recorded as BSS3, that is, the access paths from BSS1 (Previous) to BSS2 (Current) to BSS3 (Next) are formed, and the access time and the update access times are recorded.

Based on the recorded Current access BSS index BSSID2, i.e. the Previous BSS index BSSID2, new access paths BSS2 (Previous) to BSS3 (Current) are formed.

Updating the current access BSS index to be BSSID3, and updating and recording the previous access BSS index to be BSSID2.

The above process may be repeated when the client is looking for the next BSS to move (e.g., BSS 4).

It should be noted that, when generating the path library, the MAC address of each client may be used as an index to record and save each AP that each client accesses historically, and the same client may have multiple access paths.

In this embodiment, before executing step S101, the AC may determine whether the AP list around the client cannot be acquired in time or whether the AP list around the client cannot be acquired through the client. When it is determined that the AP list around the client cannot be acquired, step S101 is executed again.

In the present embodiment, the communication quality of AC monitoring includes: the transmission rate of the AP and the client is detected and/or the signal strength between the AP and the client is detected. In practical application, the two conditions can be used as the communication quality to be monitored at the same time, and one of the conditions can be used as the communication quality to be monitored.

Accordingly, the preset condition may be a preset rate and/or a preset signal strength.

When the monitored communication quality is the transmission rate of the AP and the client, if the monitored transmission rate reaches or is lower than the preset rate, the communication quality is poor, and step S101 is executed; when the monitored communication quality is that the signal strength between the AP and the client reaches or is lower than the preset signal strength, the communication quality is poor, and step S101 is performed.

In step S102, when step S101 determines that the communication quality between the first AP and the first client reaches the preset condition, the target path table is matched from the path library by using the first AP currently accessed by the first client and the second AP of the first client before the first AP is accessed as an index.

As described above, there may be multiple target path tables for the same client in the path library, at this time, the historical access times and the load information of the next AP (third AP) which are expected to be accessed in each target path table may be obtained, and weighting processing may be performed, and one or more target path tables from the multiple target path tables may be selected according to the result of the weighting processing and transmitted to the first client.

As can be seen from the above embodiments, when the AC cannot timely acquire the AP list around the client

Or when the surrounding AP list can not be obtained by the client, the calendar of the client can be obtained by the steps

History access path table of each AP, calculating candidate BSS column by history access path, statistics and load

The table assists the client to select a proper AP for access, so that the client can access to the proper AP quickly, and better use experience can be achieved.

Based on the same ideas concept as the above method, the disclosed embodiments also provide an AC including:

The foregoing describes specific embodiments of the present disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

Other embodiments of the present description will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the specification following, in general, the principles of the specification and including such departures from the present disclosure as come within known or customary practice within the art to which the specification pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the specification being indicated by the following claims.

It is to be understood that the present description is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

The foregoing description of the preferred embodiments is provided for the purpose of illustration only, and is not intended to limit the scope of the disclosure, since any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the disclosure are intended to be included within the scope of the disclosure.

Claims

1. A method for directing a client to access an AP, the method being applied to an AC, the method comprising:

detecting the communication quality of a first client accessing a first AP;

2. The method of claim 1, wherein detecting the communication quality of the first client accessing the first AP comprises:

3. The method according to claim 2, wherein the preset conditions include:

preset rate and/or preset signal strength.

4. A method according to claim 3, wherein the method of determining that the communication quality of the first client is detected to reach the preset condition comprises:

when the transmission rate of the first client and the first AP is detected to reach a preset rate, determining that the communication quality of the first client reaches a preset condition; and/or the number of the groups of groups,

5. The method of claim 1, wherein the sending the target path table to the first client comprises:

6. The method of claim 1, wherein the method of obtaining a path library comprises:

7. An AC, the AC comprising:

8. The AC of claim 7 wherein the AC is selected from the group consisting of,

the detection module is specifically configured to detect a transmission rate between the first AP and the first client and/or detect a signal strength between the first AP and the first client.

9. The AC of claim 8, wherein the preset condition comprises: preset rate and/or preset signal strength.

10. The AC of claim 9 wherein the AC is selected from the group consisting of,

the detection module is specifically configured to determine that the communication quality of the first client reaches a preset condition when it is detected that the transmission rates of the first client and the first AP reach a preset rate; and/or the number of the groups of groups,