CN111866958A - A speed limiting method and device - Google Patents

Abstract

The present application provides a speed limiting method and device, the method is applied to an AC, and the method includes: determining a wireless terminal that needs speed limiting according to access information of a wireless terminal reported by at least one AP; calculating all current speed limiting wireless terminals The sum of the actual sending rate values included in the access information of the wireless terminal; if the sum of the calculated rate values is greater than the preset rate threshold, or both the calculated sum of the rates and the currently recorded speed limit value are less than the preset rate threshold , then adjust the speed limit value according to the preset adjustment strategy; notify all APs currently accessing wireless terminals that need speed limit to delete the speed limit value configured on the radio frequency unit, and use the adjusted speed limit value as the current speed limit value. The speed limit value of the wireless terminal that needs speed limit is configured on the corresponding radio frequency unit, so that the corresponding radio frequency unit uses the adjusted speed limit value to limit the speed of the wireless terminal that currently needs speed limit. The embodiments of the present application can reduce waste of bandwidth resources and improve user experience.

Description

A speed limiting method and device

technical field

The present application relates to the field of communication technologies, and in particular, to a speed limiting method and device.

Background technique

In a wireless network, it is usually necessary to limit the speed of wireless terminals accessing the wireless network, so as to realize rational utilization of bandwidth resources.

In a speed limit scheme, the administrator configures a speed limit value on each radio frequency unit of an access point (Access Point, AP) in the wireless network, and this speed limit value is used as the actual value of the wireless terminal accessing the radio frequency unit. Sum of send rates. When a wireless terminal accesses or leaves the RF unit, the AP will adjust the speed limit value of each currently online wireless terminal on the RF unit to M/N, where M is the configured speed limit value, and N is the speed limit value. The number of wireless terminals currently online on the radio frequency unit, so as to limit the bandwidth resources of the wireless terminals connected to the radio frequency unit.

It can be seen that in the above speed limit scheme, once the wireless terminal accesses or leaves, the AP performs the speed limit adjustment operation. In this way, when the wireless terminal frequently roams or frequently goes online and offline, the AP will frequently adjust the speed limit value, resulting in a heavy load on the AP.

In addition, the AP implements a unified rate limit for all wireless terminals connected to a radio unit, and does not limit the rate of restricted wireless terminals (that is, wireless terminals that require speed-limiting) and common wireless terminals (that is, wireless terminals that do not require speed-limiting). The distinction will affect the user experience of ordinary wireless terminal users, and the actual transmission rate of some wireless terminals may be lower than the rate limit value evenly allocated by the AP, resulting in a waste of bandwidth resources.

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the related art, the present application provides a speed limiting method and device.

According to a first aspect of the embodiments of the present application, a rate limiting method is provided, where the method is applied to an access controller (Access Controller, AC) in a wireless network, and the method includes:

According to the access information of the wireless terminal reported by at least one AP in the wireless network, determine the wireless terminal that needs speed limit;

Calculate the sum of the actual sending rate values included in the access information of all wireless terminals currently requiring speed limiting in the wireless network;

If the sum of the calculated rate values is greater than the preset rate threshold, or if both the calculated sum of the rates and the currently recorded speed limit value are both smaller than the preset rate threshold, then according to the preset adjustment strategy, the speed value adjustment;

Notify all APs currently accessing the wireless terminals that need speed limiting to delete the speed limit value configured on the radio unit, and configure the adjusted speed limit value as the speed limit value of the current wireless terminal that needs speed limiting to the corresponding radio frequency unit above, the corresponding radio frequency unit uses the adjusted speed limit value to limit the speed of the wireless terminal that currently needs speed limit.

According to a second aspect of the embodiments of the present application, a speed limiting device is provided, the device is applied to an AC in a wireless network, and the device includes:

a determining module, configured to determine the wireless terminal that needs speed limit according to the access information of the wireless terminal reported by at least one AP in the wireless network;

a calculation module, configured to calculate the sum of the actual transmission rate values included in the access information of all wireless terminals currently requiring speed limiting in the wireless network;

An adjustment module, used for if the sum of the calculated rate values is greater than the preset rate threshold, or if the calculated sum of the rates and the currently recorded speed limit value are both smaller than the preset rate threshold, then according to the preset adjustment strategy , adjust the speed limit value;

The notification module is used to notify all APs currently accessing the wireless terminals that need speed limit to delete the speed limit value configured on the radio frequency unit, and use the adjusted speed limit value as the speed limit value configuration of the current wireless terminal that needs speed limit. Go to the corresponding radio frequency unit, and use the adjusted speed limit value by the corresponding radio frequency unit to limit the speed of the wireless terminal that currently needs to limit the speed.

The technical solutions provided by the embodiments of the present application may include the following beneficial effects:

In this embodiment of the present application, the AC can distinguish the wireless terminals that need to be speed-limited according to the access information of the wireless terminals reported by the AP, and decide how to adjust these wireless terminals according to the corresponding actual transmission rates specifically for all current wireless terminals that need to be speed-limited. The speed limit value of the terminal, and the adjusted speed limit value is sent to the corresponding AP to realize the speed limit for these wireless terminals. This rate limiting method can reasonably balance bandwidth resources, reduce waste of bandwidth resources, and does not affect common wireless terminals, thereby improving user experience.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not limiting of the present application.

Description of drawings

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

1 is one of the schematic flow charts of a speed limiting method provided by an embodiment of the present application;

FIG. 2 is the second schematic flow chart of a speed limiting method provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a speed limiting device according to an embodiment of the present application.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and 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 application to describe various information, such information should not be limited by these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information without departing from the scope of the present application. Depending on the context, the word "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determining."

Next, the embodiments of the present application will be described in detail.

An embodiment of the present application provides a rate limiting method, which is applied to an AC in a wireless network. As shown in FIG. 1 , the method may include the following steps:

S11. Determine the wireless terminal that needs speed limit according to the access information of the wireless terminal reported by at least one AP in the wireless network.

S12: Calculate the sum of the actual sending rate values included in the access information of all wireless terminals currently requiring rate limiting in the wireless network.

S13. If the sum of the calculated rate values is greater than the preset rate threshold, or if both the calculated sum of the rates and the currently recorded speed limit value are both smaller than the preset rate threshold, then according to the preset adjustment strategy, adjust the speed limit value make adjustments.

S14. Notify all APs currently accessing the wireless terminals that need to limit the speed to delete the speed limit value configured on the radio frequency unit, and configure the adjusted speed limit value as the speed limit value of the wireless terminal that needs speed limit currently to the corresponding wireless terminal. On the radio frequency unit, the corresponding radio frequency unit uses the adjusted speed limit value to limit the speed of the wireless terminal that currently needs to limit the speed.

In this step, for any AP among the APs currently accessed by all wireless terminals that need to limit the speed, the AC can send two notification messages to the AP, and one notification message is used to instruct the AP to configure the The speed limit value (that is, the speed limit value of the wireless terminal that needs speed limit on the corresponding radio unit) is all deleted, and another notification message is used to indicate the speed limit value of the wireless terminal that needs speed limit issued by the AP according to the AC, Configure it on the corresponding RF unit.

The AC can also send a notification message to the AP to notify the AP to delete and configure the rate limit value. Of course, the AC may also notify the AP in other ways, which will not be listed one by one here.

In this embodiment of the present application, in order to prevent the AP from frequently adjusting the speed limit, increase the load on the AP, and avoid some meaningless adjustments in the process of adjusting the speed limit, the AP no longer performs the speed limit operation in this application, and the AP is only responsible for reporting to the AC The access information of the wireless terminal connected to its own radio unit. The AC decides whether and how to adjust the speed limit according to the access information to reduce the load of the AP. Each piece of access information can include the wireless terminal access information. information such as the AP, the radio frequency unit accessed by the wireless terminal, the MAC address of the wireless terminal, the access service identifier, and the actual transmission rate.

Here, the AP can report the access information of the wireless terminal according to the reporting policy delivered to it by the AC. For example, the reporting policy is to report according to the set interval. In this way, to a certain extent, it truly reflects the period after the wireless terminal is stably online. The actual sending rate within the time period. The shorter the setting interval is, the higher the accuracy of subsequent rate limit adjustment will be.

Once the AC receives the access information reported by the AP, it triggers the rate limiting process, that is, executes the above steps S11 to S14.

Specifically, in the above step S11, the AC can determine the wireless terminal that needs speed limit in the following ways:

For each wireless terminal, determine whether the MAC address included in the access information of the wireless terminal is in the preset speed limit terminal list;

When the determination result is yes, further determine whether the access service identifier included in the access information of the wireless terminal is the identifier of the access service with the speed limiting service function enabled, and when the determination result is yes, determine the wireless terminal For wireless terminals that require speed limiting.

It should be noted that, if the MAC address included in the access information of the wireless terminal is not in the preset list of speed-limiting terminals, or the access service identifier included in the access information of the wireless terminal is not one with the speed-limiting service function enabled The identification of the access service indicates that the wireless terminal is not a wireless terminal that needs speed limit, and the process ends.

After determining the wireless terminals that need to be speed-limited, the AC can also perform the following operations for each determined wireless terminal that needs to be speed-limited:

Determine whether the access information of the wireless terminal has been recorded locally;

When the judgment result is yes, update the recorded access information of the wireless terminal to the received access information of the wireless terminal, and refresh the corresponding aging timer;

When the judgment result is no, record the access information of the wireless terminal, and set an aging timer for the access information of the wireless terminal;

When the aging timer expires, the currently recorded access information of the wireless terminal is deleted, and the AP accessed by the wireless terminal is notified to delete the current speed limit value of the wireless terminal, and returns to the above step S12 to re-optimize the speed limit value, In order to avoid offline wireless terminals occupying bandwidth resources.

Specifically, in the above step S13, the AC can adjust the speed limit value in the following ways:

In the first case, when the sum of the calculated speed values is greater than the preset speed threshold, the speed limit value is adjusted in the following ways:

Change the speed limit value to the highest actual sending rate value among the actual sending rate values of all current wireless terminals that need speed limiting, and adjust the speed limit value after the change according to the preset reduction ratio, for example, by 5%, etc. ;

Modifying the actual sending rate values that are higher than the reduced speed limit value among the actual sending rate values of all the wireless terminals currently requiring speed limit to the reduced speed limit value;

Recalculate the actual sending rate values of all the wireless terminals that need speed limit at present, and when the sum of the recalculated rate values is greater than the preset rate threshold, use the reduced speed limit value as the speed limit value, and return to execute the limit value. The step of changing the speed value to the highest actual sending rate value among the current actual sending rate values of all wireless terminals that need speed limiting, until the sum of the recalculated rate values is not greater than the preset rate threshold.

In the second case, when the sum of the calculated speed and the currently recorded speed limit value are both less than the preset speed threshold value, the speed limit value is adjusted in the following ways:

The speed limit value is increased according to a preset increase ratio, for example, an increase of 5%, etc., wherein the increased speed limit value is not greater than a preset speed threshold value.

Further, in this embodiment of the present application, the AC may also perform the following operations:

When the sum of the calculated rates is less than the preset rate threshold and the rate limit value is equal to the preset rate threshold, if there are roaming wireless terminals among all the wireless terminals currently requiring speed limit, the AP before roaming is notified to the roaming wireless terminal to delete the roaming. The speed limit value of the wireless terminal, and the speed limit value is sent to the AP after the roaming wireless terminal roams, so that the AP after the roaming wireless terminal roams configures the speed limit value as the speed limit value of the roaming wireless terminal (this speed limit value actually It is configured on the radio frequency unit that the roaming wireless terminal accesses), and uses the speed limit value to limit the speed of the roaming wireless terminal; if there is no roaming wireless terminal in the wireless terminals that need speed limit currently, end this process.

In this operation process, for each wireless terminal that needs speed limit, it can be judged whether the accessed AP and the accessed radio frequency unit included in the access information of the wireless terminal have changed compared with those recorded before. If there is a change, it means that the wireless terminal has roamed, and it is determined that the wireless terminal is a roaming terminal; if there is no change, it means that the wireless terminal has not roamed, and it is determined that the wireless terminal is not a roaming terminal.

The above speed limiting method will be described in detail below with reference to specific embodiments.

Suppose that an AP in the wireless network reports to the AC a wireless terminal newly accessed on a radio frequency unit of the AP; suppose that the AC currently records the access information of two wireless terminals on the radio frequency unit that need to be limited in speed. The recorded speed limit value is P, the preset speed threshold value is M, and the speed limit process performed by the AC is as follows (as shown in Figure 2):

S21: Receive access information of the wireless terminal.

S22: Determine whether the MAC address included in the access information of the wireless terminal is in the preset speed-limiting terminal list; if the determination result is no, step S23 is performed, and if the determination result is yes, step S24 is performed.

S23: End the process.

S24: Determine whether the access service identifier included in the access information of the wireless terminal is the identifier of the access service with the speed-limiting service function enabled; when the determination result is no, execute step S23, and when the determination result is yes, execute Step S25.

S25: Determine whether the access information of the wireless terminal has been recorded locally; if the determination result is yes, step S26 is performed, and if the determination result is negative, step S27 is performed.

S26: Update the recorded access information of the wireless terminal to the received access information of the wireless terminal, and refresh the corresponding aging timer.

S27: Record the access information of the wireless terminal, and set an aging timer for the access information of the wireless terminal.

Subsequently, when the aging timer expires, the access information of the wireless terminal is deleted, and the AP accessed by the wireless terminal is notified to delete the current speed limit value of the wireless terminal, and step S28 is continued.

S28: Calculate the sum of the actual sending rate values included in the access information of all wireless terminals currently requiring rate limiting in the wireless network.

S29: Determine whether the sum of the calculated velocity values is greater than M; if the determination result is yes, step S30 is performed, and if the determination result is no, step S32 is performed.

S30: According to the adjustment strategy 1, adjust P to obtain P1.

For the specific adjustment process, see the adjustment process in the first case above, which will not be described in detail here. After that, step S31 is performed.

S31 : Notify the AP to delete the speed limit value configured on the radio frequency unit, and configure P1 as the speed limit value of the three wireless terminals on the radio frequency unit, so that the radio frequency unit uses P1 to perform operation on the three wireless terminals. speed limit.

S32: Determine whether P is less than M; if the determination result is yes, step S33 is performed, and if the determination result is no, step S35 is performed.

S33: According to the adjustment strategy 2, adjust P to obtain P2.

For the specific adjustment process, see the adjustment process in the second case above, which will not be described in detail here. After that, step S34 is performed.

S34: Notify the AP to delete the speed limit value configured on the radio frequency unit, and configure P2 as the speed limit value of the three wireless terminals on the radio frequency unit, so that the radio frequency unit uses P2 to perform the operation on the three wireless terminals. speed limit.

S35: Determine whether P is equal to M; if the determination result is yes, step S36 is performed, and if the determination result is no, step S23 is performed.

S36: If there is a roaming wireless terminal among all the wireless terminals currently requiring speed limit, notify the AP before the roaming wireless terminal to delete the speed limit value (ie, P) of the roaming wireless terminal, and send P to the roaming wireless terminal after roaming. AP, so that the AP after the roaming wireless terminal roams configures P as the speed limit value of the roaming wireless terminal, and uses P to limit the speed of the roaming wireless terminal.

It should be noted that, after the AC completes the above step S31, or the above step S34, or the above step S36, it means that the speed limit process is completed. The access information of the wireless terminal that needs to be speed-limited and accessed on one or some radio frequency units, restart the speed-limiting process; once it is found that the aging timer of the access information of a certain wireless terminal has expired, the above step S28 is re-executed to timely Adjust bandwidth resources.

It can be seen from the above technical solutions that the AC can distinguish the wireless terminals that need speed limiting according to the access information of the wireless terminals reported by the AP. The speed limit value of these wireless terminals, and the adjusted speed limit value is delivered to the corresponding AP, so as to realize the speed limit for these wireless terminals. This rate limiting method can reasonably balance bandwidth resources, reduce waste of bandwidth resources, and does not affect common wireless terminals, thereby improving user experience.

Based on the same inventive concept, the present application also provides a speed limiting device, which is applied to an AC in a wireless network. The schematic diagram of the structure is shown in FIG. 3 , and specifically includes:

A determination module 31, configured to determine the wireless terminal that needs speed limit according to the access information of the wireless terminal reported by at least one AP in the wireless network;

A calculation module 32, configured to calculate the sum of the actual transmission rate values included in the access information of all wireless terminals currently requiring speed limiting in the wireless network;

Adjustment module 33, for if the sum of the calculated speed values is greater than the preset speed threshold, or the calculated sum of the speed and the currently recorded speed limit value are both less than the preset speed threshold, then adjust according to the preset strategy to adjust the speed limit value;

The notification module 34 is used to notify all APs currently accessing the wireless terminals that need to limit the speed to delete the speed limit value configured on the radio frequency unit, and use the adjusted speed limit value as the speed limit value of the wireless terminal that currently needs the speed limit. It is configured on the corresponding radio frequency unit, so that the corresponding radio frequency unit uses the adjusted speed limit value to limit the speed of the wireless terminal that currently needs to limit the speed.

Preferably, the determining module 31 is specifically used for:

For each wireless terminal, determine whether the MAC address included in the access information of the wireless terminal is in the preset speed limit terminal list;

When the determination result is yes, further determine whether the access service identifier included in the access information of the wireless terminal is the identifier of the access service with the speed limiting service function enabled, and when the determination result is yes, determine the wireless terminal For wireless terminals that require speed limiting.

Preferably, the adjustment module 33 is specifically used for:

When the sum of the calculated rate values is greater than the preset rate threshold, the rate limit value is changed to the highest actual transmission rate value among the actual transmission rate values of all the current wireless terminals that need to be limited in speed, and according to the preset rate Set the reduction ratio to lower the changed speed limit value;

Modifying the actual transmission rate values that are higher than the down-regulated speed-limit values in the actual transmission rate values of all the wireless terminals currently requiring speed-limiting to the down-regulated rate-limit values;

Recalculate the actual transmission rate values of all the current wireless terminals that need speed limiting, and when the sum of the recalculated rate values is greater than the preset rate threshold, use the lowered speed limit value as the speed limit value, return and execute the step of changing the speed limit value to the highest actual sending rate value among the actual sending rate values of all current wireless terminals that need speed limiting, until the sum of the recalculated rate values is not greater than the preset rate threshold;

When the sum of the calculated speed and the currently recorded speed limit value are both smaller than the preset speed threshold value, the speed limit value is increased according to the preset increase ratio, wherein the increased speed limit value is not greater than the preset speed limit value. the preset rate threshold.

Preferably, the notification module 34 is further configured to:

When the sum of the calculated rates is less than the preset rate threshold and the rate limit value is equal to the preset rate threshold, if there is a roaming wireless terminal among all the current wireless terminals that need to limit the speed, notify the The AP before the roaming wireless terminal roams deletes the speed limit value of the roaming wireless terminal; sends the speed limit value to the AP after the roaming wireless terminal roams, so that the AP after the roaming wireless terminal roams The speed limit value is configured as a speed limit value of the roaming wireless terminal, and the speed limit value is used to limit the speed of the roaming wireless terminal.

Preferably, the determining module 31 is further configured to:

For each determined wireless terminal that needs to be limited in speed, determine whether the access information of the wireless terminal has been recorded locally;

When the judgment result is yes, update the recorded access information of the wireless terminal to the received access information of the wireless terminal, and refresh the corresponding aging timer;

When the judgment result is no, record the access information of the wireless terminal, and set an aging timer for the access information of the wireless terminal;

When the aging timer expires, delete the currently recorded access information of the wireless terminal, notify the AP accessed by the wireless terminal to delete the current speed limit value of the wireless terminal, and return to executing the calculation of all the current required limit values in the wireless network. The step of adding the actual transmission rate value included in the access information of the fast wireless terminal.

It can be seen from the above technical solutions that the AC can distinguish the wireless terminals that need speed limiting according to the access information of the wireless terminals reported by the AP. The speed limit value of these wireless terminals, and the adjusted speed limit value is delivered to the corresponding AP, so as to realize the speed limit for these wireless terminals. This rate limiting method can reasonably balance bandwidth resources, reduce waste of bandwidth resources, and does not affect common wireless terminals, thereby improving user experience.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the present application. within the scope of protection.

Claims (10)

1. A rate limiting method, wherein the method is applied to an access controller AC in a wireless network, and the method comprises: According to the access information of the wireless terminal reported by at least one access point AP in the wireless network, determine the wireless terminal that needs speed limit; Calculate the sum of the actual sending rate values included in the access information of all wireless terminals currently requiring speed limiting in the wireless network; If the sum of the calculated rate values is greater than the preset rate threshold, or if both the calculated sum of the rates and the currently recorded speed limit value are both smaller than the preset rate threshold, then according to the preset adjustment strategy, the speed value adjustment; Notify all APs currently accessing the wireless terminals that need speed limiting to delete the speed limit value configured on the radio unit, and configure the adjusted speed limit value as the speed limit value of the current wireless terminal that needs speed limiting to the corresponding radio frequency unit above, the corresponding radio frequency unit uses the adjusted speed limit value to limit the speed of the wireless terminal that currently needs speed limit. 2 . The method according to claim 1 , wherein, according to the access information of the wireless terminal reported by at least one AP in the wireless network, determining the wireless terminal that needs speed limit, specifically comprising: 3 . For each wireless terminal, determine whether the MAC address included in the access information of the wireless terminal is in the preset speed limit terminal list; When the determination result is yes, further determine whether the access service identifier included in the access information of the wireless terminal is the identifier of the access service with the speed limiting service function enabled, and when the determination result is yes, determine the wireless terminal For wireless terminals that require speed limiting. 3. The method according to claim 1 or 2, wherein the speed limit value is adjusted according to a preset adjustment strategy, which specifically includes: When the sum of the calculated rate values is greater than the preset rate threshold, the rate limit value is changed to the highest actual transmission rate value among the actual transmission rate values of all the current wireless terminals that need to be limited in speed, and according to the preset rate Set the reduction ratio to lower the changed speed limit value; Modifying the actual transmission rate values that are higher than the down-regulated speed-limit values in the actual transmission rate values of all the wireless terminals currently requiring speed-limiting to the down-regulated rate-limit values; Recalculate the actual transmission rate values of all the current wireless terminals that need speed limiting, and when the sum of the recalculated rate values is greater than the preset rate threshold, use the lowered speed limit value as the speed limit value, return and execute the step of changing the speed limit value to the highest actual sending rate value among the actual sending rate values of all current wireless terminals that need speed limiting, until the sum of the recalculated rate values is not greater than the preset rate threshold; When the sum of the calculated speed and the currently recorded speed limit value are both smaller than the preset speed threshold value, the speed limit value is increased according to the preset increase ratio, wherein the increased speed limit value is not greater than the preset speed limit value. the preset rate threshold. 4. The method according to claim 1 or 2, wherein the method further comprises: When the sum of the calculated rates is less than the preset rate threshold and the rate limit value is equal to the preset rate threshold, if there is a roaming wireless terminal among all the current wireless terminals that need to limit the speed, notify the The AP before the roaming wireless terminal roams deletes the speed limit value of the roaming wireless terminal; Send the speed limit value to the AP after the roaming wireless terminal roams, so that the AP after the roaming wireless terminal roams configures the speed limit value as the speed limit value of the roaming wireless terminal, and uses the speed limit value of the roaming wireless terminal. The speed limit value is used to limit the speed of the roaming wireless terminal. 5. The method according to claim 1, wherein the method further comprises: For each determined wireless terminal that needs to be limited in speed, determine whether the access information of the wireless terminal has been recorded locally; When the judgment result is yes, update the recorded access information of the wireless terminal to the received access information of the wireless terminal, and refresh the corresponding aging timer; When the judgment result is no, record the access information of the wireless terminal, and set an aging timer for the access information of the wireless terminal; When the aging timer expires, delete the currently recorded access information of the wireless terminal, notify the AP accessed by the wireless terminal to delete the current speed limit value of the wireless terminal, and return to executing the calculation of all the current required limit values in the wireless network. The step of adding the actual transmission rate value included in the access information of the fast wireless terminal. 6. A speed limiting device, wherein the device is applied to an access controller AC in a wireless network, and the device comprises: a determining module, configured to determine the wireless terminal that needs speed limit according to the access information of the wireless terminal reported by at least one access point AP in the wireless network; a calculation module, configured to calculate the sum of the actual transmission rate values included in the access information of all wireless terminals currently requiring speed limiting in the wireless network; An adjustment module, used for if the sum of the calculated rate values is greater than the preset rate threshold, or if the calculated sum of the rates and the currently recorded speed limit value are both smaller than the preset rate threshold, then according to the preset adjustment strategy , adjust the speed limit value; The notification module is used to notify all APs currently accessing the wireless terminals that need speed limit to delete the speed limit value configured on the radio frequency unit, and use the adjusted speed limit value as the speed limit value configuration of the current wireless terminal that needs speed limit. Go to the corresponding radio frequency unit, and use the adjusted speed limit value by the corresponding radio frequency unit to limit the speed of the wireless terminal that currently needs to limit the speed. 7. The device according to claim 6, wherein the determining module is specifically used for: For each wireless terminal, determine whether the MAC address included in the access information of the wireless terminal is in the preset speed limit terminal list; When the determination result is yes, further determine whether the access service identifier included in the access information of the wireless terminal is the identifier of the access service with the speed limiting service function enabled, and when the determination result is yes, determine the wireless terminal For wireless terminals that require speed limiting. 8. The device according to claim 6 or 7, wherein the adjustment module is specifically used for: When the sum of the calculated rate values is greater than the preset rate threshold, the rate limit value is changed to the highest actual transmission rate value among the actual transmission rate values of all the current wireless terminals that need to be limited in speed, and according to the preset rate Set the reduction ratio to lower the changed speed limit value; Modifying the actual transmission rate values that are higher than the down-regulated speed-limit values in the actual transmission rate values of all the wireless terminals currently requiring speed-limiting to the down-regulated rate-limit values; Recalculate the actual transmission rate values of all the current wireless terminals that need speed limiting, and when the sum of the recalculated rate values is greater than the preset rate threshold, use the lowered speed limit value as the speed limit value, return and execute the step of changing the speed limit value to the highest actual sending rate value among the actual sending rate values of all current wireless terminals that need speed limiting, until the sum of the recalculated rate values is not greater than the preset rate threshold; When the sum of the calculated speed and the currently recorded speed limit value are both smaller than the preset speed threshold value, the speed limit value is increased according to a preset increase ratio, wherein the increased speed limit value is smaller than the preset speed limit value. Preset rate threshold. 9. The device according to claim 6 or 7, wherein the notification module is further configured to: When the sum of the calculated rates is less than the preset rate threshold and the rate limit value is equal to the preset rate threshold, if there is a roaming wireless terminal among all the current wireless terminals that need to limit the speed, notify the The AP before the roaming wireless terminal roams deletes the speed limit value of the roaming wireless terminal, and sends the speed limit value to the AP, so that the AP after the roaming wireless terminal roams, so that the roaming wireless terminal The AP after roaming configures the speed limit value as the speed limit value of the roaming wireless terminal, and uses the speed limit value to limit the speed of the roaming wireless terminal. 10. The apparatus according to claim 6, wherein the determining module is further configured to: For each determined wireless terminal that needs to be limited in speed, determine whether the access information of the wireless terminal has been recorded locally; When the judgment result is yes, update the recorded access information of the wireless terminal to the received access information of the wireless terminal, and refresh the corresponding aging timer; When the judgment result is no, record the access information of the wireless terminal, and set an aging timer for the access information of the wireless terminal; When the aging timer expires, delete the currently recorded access information of the wireless terminal, notify the AP accessed by the wireless terminal to delete the current speed limit value of the wireless terminal, and return to executing the calculation of all the current required limit values in the wireless network. The step of adding the actual transmission rate value included in the access information of the fast wireless terminal.

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