CN109495930B - Load balancing method, AC and system - Google Patents

Load balancing method, AC and system Download PDF

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CN109495930B
CN109495930B CN201811559683.9A CN201811559683A CN109495930B CN 109495930 B CN109495930 B CN 109495930B CN 201811559683 A CN201811559683 A CN 201811559683A CN 109495930 B CN109495930 B CN 109495930B
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load
neighbor
communication channel
aps
list
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CN109495930A (en
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韩志强
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Maipu Communication Technology Co Ltd
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Maipu Communication Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/10—Reselecting an access point controller
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a load balancing method, an AC and a system, which belong to the technical field of wireless communication, and are applied to a wireless controller AC in a wireless network, wherein the AC acquires load information of the AC, sends a load sharing request message to a neighbor AC when determining that the AC is overloaded, receives response information sent by the neighbor AC, acquires a list of APs establishing a standby communication channel with the neighbor AC, determines at least one AP which establishes a main communication channel with the AC and can be used for switching according to the list of the APs, selects an AP needing to be switched from the at least one AP, and informs the AP needing to be switched to switch the main communication channel to the neighbor AC; the AP which needs to be switched is selected for switching, so that reasonable load distribution among the ACs is realized, the frequency of frequent switching of the AP is reduced, the stability of network load is guaranteed, the continuity of the service is maintained, and the quality of network service is improved.

Description

Load balancing method, AC and system
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a load balancing method, an AC and a system
Background
At present, a Wireless network generally adopts a networking mode of a Wireless Access Point Controller (AC) + a Wireless Access Point (AP), the AC is used for performing centralized control on the AP, and the AP is used for providing a Wireless data transmission service for an Access terminal, but as the coverage of the Wireless network is wider and wider, maintaining stable network load and higher network service quality is a key problem in a Wireless network application link, so a load balancing technology in the Wireless network becomes a hotspot.
For example, when a wireless terminal is associated, an AP access with a light load is found for the wireless terminal, and the service is distributed by implementing load balancing among APs in the wireless network, so that the stability of network load is maintained, and the service quality of the network is improved. Therefore, based on the generation of a technology for realizing load balancing among ACs in a wireless network, a plurality of ACs are deployed in the wireless network, and the stability of network load is maintained by realizing load balancing among the ACs, a method is disclosed in the invention patent application document with application publication number CN102387539A, in which a cluster management channel is established among adjacent ACs, and load information of the AP is periodically exchanged to mount the AP to the AC with a lighter load, so as to realize traffic distribution and achieve the purpose of load balancing of the AC service, but the problem exists in this way: firstly, each AC needs to periodically exchange respective current load information for comparison, so that the AP actively selects the AC with lighter load for switching, and the AP can be frequently switched under the condition that the load difference between the two ACs is not obvious; secondly, when there are many ACs in the network, there may be a case where multiple heavily loaded ACs request AP switching to the lightest loaded AC, so that the load of the lightest loaded AC is increased; furthermore, configuration information of multiple ACs may be different, which may cause an AP to drop or a terminal associated with the AP to drop during a handover process, thereby causing abnormal situations such as service interruption or unavailability.
In summary, how to achieve reasonable load distribution among the ACs and reduce the frequency of frequent switching of the APs, and ensure the stability of the network load so as to maintain the continuity of the service is an urgent problem to be solved.
Disclosure of Invention
The embodiment of the invention provides a load balancing method, an AC and a system, which can realize reasonable load distribution among the ACs, reduce the frequency of frequent switching of the AP, ensure the stability of network load, and further keep the continuity of services, thereby improving the quality of network services.
In a first aspect, an embodiment of the present invention provides a load balancing method, which is applied to a wireless controller AC in a wireless network, and the method includes:
the AC acquires load information of the AC and sends a load sharing request message to a neighbor AC when determining that the AC is overloaded, wherein the load sharing request message comprises the load information of the AC;
receiving a response message sent by the neighbor AC, wherein the response message comprises a list of APs establishing a standby communication channel with the neighbor AC;
the AC determines at least one AP which can be used for switching according to the list of the APs, wherein the at least one AP is an AP which establishes a main communication channel with the AC;
The AC selects an AP needing to be switched from the at least one AP through a preset rule;
and informing the AP needing to be switched to switch the main communication channel to the neighbor AC.
Further, the load information includes a current load value and a preset load threshold of the AC, the AC acquires its own load information, and sends a load sharing request message to a neighboring AC when determining that it is overloaded, including:
the AC periodically polls the current load value and the preset load threshold value of the AC, determines that the AC is overloaded when the current load value of the AC exceeds the preset load threshold value of the AC, and sends a request message to the neighboring AC to request the load sharing.
Further, the determining, by the AC, at least one AP available for handover according to the list of APs specifically includes:
the AC searches for an AP which has the same identification information and establishes a main communication channel with the AC in the list of the APs as at least one AP which can be used for switching on the AC; wherein, the identification information is a MAC address.
The load balancing method provided by the embodiment of the invention is applied to a wireless controller (AC) in a wireless network, the AC acquires load information of the AC, sends a load sharing request message to a neighbor AC when determining that the AC is overloaded, receives a response message sent by the neighbor AC, acquires a list of APs establishing a standby communication channel with the neighbor AC, determines at least one AP establishing a main communication channel with the AC according to the list of the APs, and can be used for switching, selects an AP needing to be switched from the at least one AP, and informs the AP needing to be switched to switch the main communication channel to the neighbor AC; the AP which needs to be switched is selected for switching, so that reasonable load distribution among the ACs is realized, the frequency of frequent switching of the AP is reduced, the stability of network load is guaranteed, the continuity of the service is maintained, and the quality of network service is improved.
In a second aspect, an embodiment of the present invention further provides another load balancing method, which is applied to a radio controller AC in a wireless network, where the method includes:
receiving a load sharing request message sent by a neighbor AC, wherein the load sharing request message comprises load information of the neighbor AC;
judging whether the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value or not according to the load information of the neighbor AC;
if so, sending a response message to the neighbor AC, wherein the response message comprises a list of APs establishing a standby communication channel with the neighbor AC; the list of APs includes at least one AP establishing a primary communication channel with the neighboring AC.
Further, after receiving the load sharing request message sent by the neighbor AC, before the determining whether the difference between the current load of the neighbor AC and the current load of the neighbor AC is greater than a preset threshold, the method further includes: and the AC judges that the current load value of the AC does not exceed the preset load threshold value of the AC, and determines that the AC is not overloaded.
The other load balancing method provided by the embodiment of the invention is applied to a wireless controller AC in a wireless network, the AC receives a load sharing request message sent by a neighbor AC, the load sharing request message comprises the load information of the neighbor AC, when the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value, sending a response message to the neighbor AC, acquiring a list of APs establishing a standby communication channel with the neighbor AC from the response message, the list of the APs includes at least one AP establishing a primary communication channel with the neighbor AC, so as to assist the neighbor AC in load sharing, reasonable load distribution is achieved between the ACs and the problem of maintaining continuity of traffic by reducing the frequency of traffic interruptions caused by frequent switching of APs if adjacent AC loads are not very different.
In a third aspect, an embodiment of the present invention further provides a wireless controller AC, including:
a request module, configured to acquire load information of the AC, and send a load sharing request message to a neighboring AC when determining that the AC is overloaded, where the load sharing request message includes the load information of the AC;
a receiving module, configured to receive a response message sent by the neighbor AC, where the response message includes a list of APs that establish a standby communication channel with the neighbor AC;
a determining module, configured to determine, by the AC according to the list of APs, at least one AP that can be used for handover, where the at least one AP is an AP that establishes a primary communication channel with the AC;
a selection module, configured to select, by the AC, an AP that needs to be switched from the at least one AP according to a preset rule;
and the notifying module is used for notifying the AP needing to be switched to switch the main communication channel to the neighbor AC.
Wherein the load information includes a current load value of the AC and a preset load threshold.
Further, the request module is specifically configured to: the AC periodically polls the current load value and the preset load threshold value of the AC, determines that the AC is overloaded when the current load value of the AC exceeds the preset load threshold value of the AC, and sends a request message to the neighboring AC to request the load sharing.
Further, the determining module is specifically configured to: the AC searches for an AP which has the same identification information and establishes a main communication channel with the AC in the list of the APs as at least one AP which can be used for switching on the AC; wherein, the identification information is a MAC address.
In an AC provided by the embodiments of the present invention, a request module of the AC acquires load information of the AC, and sends a load sharing request message to a neighboring AC when determining that the AC is overloaded, a receiving module receives a response message sent by the neighboring AC, and acquires a list of APs that establish a standby communication channel with the neighboring AC, a determining module determines at least one AP that establishes a main communication channel with the AC and is available for switching according to the list of APs, a selecting module selects an AP to be switched from the at least one AP through a preset rule, a notifying module notifies the AP to be switched to switch the main communication channel to the neighboring AC, and the selecting module selects the AP to be switched to switch, so as to implement reasonable load distribution between the ACs and reduce the frequency of frequent switching of the APs, thereby ensuring stability of network load and maintaining continuity of services, thereby improving the quality of network service.
In a fourth aspect, an embodiment of the present invention further provides another wireless controller AC, including:
a receiving module, configured to receive a load sharing request message sent by a neighbor AC, where the load sharing request message includes load information of the neighbor AC;
the judging module is used for judging whether the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value or not according to the load information of the neighbor AC; if so, the notification response module sends a response message to the neighbor AC,
the response module is used for sending a response message to the neighbor AC when the judging module judges whether the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value, wherein the response message comprises a list of APs establishing a standby communication channel with the neighbor AC; the list of APs includes at least one AP establishing a primary communication channel with the neighboring AC.
Further, the determining module is configured to, after receiving the load sharing request message sent by the neighbor AC, determine whether a difference between the current load of the neighbor AC and the current load of the AC is greater than a preset threshold according to the load information of the neighbor AC, and before determining that the current load value of the AC does not exceed the preset load threshold of the AC, determine that the AC is not overloaded.
In another wireless controller AC provided in the embodiment of the present invention, the receiving module of the AC receives a load sharing request message sent by a neighboring AC, the load sharing request message comprises the load information of the neighbor AC, and the judging module judges whether the load sharing request message comprises the load information of the neighbor AC, when the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value, sending a response message to the neighbor AC, acquiring a list of APs establishing a standby communication channel with the neighbor AC from the response message, the list of the APs includes at least one AP establishing a primary communication channel with the neighbor AC, so as to assist the neighbor AC in load sharing, reasonable load distribution is achieved between the ACs and the problem of maintaining continuity of traffic by reducing the frequency of traffic interruptions caused by frequent switching of APs if adjacent AC loads are not very different.
In a fifth aspect, an embodiment of the present invention further provides a load balancing system applied in a wireless network, where the system includes the wireless controller AC according to the third aspect and the wireless controller AC according to the fourth aspect.
The embodiment of the invention also provides a load balancing system, which is applied to a wireless controller AC in a wireless network, wherein the AC acquires load information of the AC, sends a load sharing request message to a neighbor AC when determining that the AC is overloaded, receives a response message sent by the neighbor AC, the response message comprises a list of APs establishing a standby communication channel with the neighbor AC, the AC determines at least one AP establishing a main communication channel with the AC and available for switching according to the list of APs, selects an AP needing to be switched from the at least one AP and informs the AP needing to be switched to switch the main communication channel to the neighbor AC, reasonable load distribution is realized between the ACs by selecting the AP needing to be switched for switching, and the frequency of service interruption caused by frequent switching of the APs under the condition that the load difference of the adjacent ACs is not obvious is reduced, the stability of network load is guaranteed, so that the continuity of the service is maintained, and the quality of network service is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of an architecture of a load balancing system according to an embodiment of the present invention;
fig. 2 is a flowchart of a load balancing method according to an embodiment of the present invention;
fig. 3a is a flowchart of another load balancing method according to an embodiment of the present invention;
fig. 3b is a second flowchart of another load balancing method according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a wireless controller AC according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another wireless controller AC according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, which is a schematic structural diagram of a load balancing system provided in an embodiment of the present invention, wherein a solid line between an AP and an AC1 represents that the AP establishes a primary communication channel with the AC1 for transmitting a service data stream to perform normal operation, and a dashed line between the AP and an AC2 represents that the AP establishes a backup communication channel with the AC2 for tunnel keep-alive, it should be noted that a scenario in which the present invention is actually applied includes, but is not limited to, the schematic application scenario shown in fig. 1, and a specific number of the AC and the AP in the system does not affect a protection range of the present invention, and is not specifically limited herein.
In addition, the main communication channel And the standby communication channel may be communication channels established according to a light Access Point Protocol (LWAPP), or may be communication channels established according to a Wireless Access Point And a configuration Protocol (Control And Provisioning of Wireless Access Points, wap), And a change in the specific channel Protocol type does not affect the protection range of the present invention. This applies in the same way to the following description of the solution according to the invention, which will not be repeated hereinafter.
As shown in fig. 2, an embodiment of the present invention provides a flowchart of a load balancing method, which is applied to a wireless controller AC in a wireless network, and the method includes:
step 201, the AC acquires its own load information, and sends a load sharing request message to a neighboring AC when determining that it is overloaded.
The load sharing request message includes load information of the AC, where the load information includes a current load value of the AC and a preset load threshold of the AC, and may also include other relevant parameters of load balancing configured on the AC, such as a traffic impact coefficient of an AP and an impact coefficient of a terminal, and the like, where the relevant parameters may be configured or set in advance by the AC according to an actual situation of the AC, and the relevant parameters of load balancing of each AC may be the same or different, and are not limited specifically here.
As described in conjunction with fig. 1, the AC1 periodically polls its current load information including, but not limited to, the current load value of the AC1 and the preset load threshold of the AC1, determines that the AC1 is overloaded when the current load value of the AC1 exceeds the preset load threshold of the AC1, and sends a request message to the neighboring AC2 to request to share the load on the AC 1.
Step 202, receiving a response message sent by the neighbor AC.
Wherein the response message includes a list of APs that establish a backup communication channel with the neighbor AC.
In this step, the AC1 receives a response message replied by the neighbor AC2 according to the load sharing request message sent by the AC1 in step 201, where the response message includes a list of APs that establish a standby communication channel with the neighbor AC2, and the list of APs carries identification information of each AP that establishes a standby communication channel with the neighbor AC2, where the identification information may be a MAC address of each AP.
Step 203, the AC determines at least one AP available for handover according to the list of APs.
Wherein the at least one AP is an AP establishing an active communication channel with the AC.
In this step, in conjunction with step 202, the AC1 searches for an AP that has the same MAC address in the AC1 and establishes an active communication channel with the AC1 itself as at least one AP on the AC1 that is available for handoff based on the MAC address of each AP in the list.
And 204, selecting the AP needing to be switched from the at least one AP by the AC through a preset rule.
In this step, the AC1 selects an AP to be switched from the at least one AP according to a preset rule, and the specific process is as follows: firstly, the AC1 determines that the average load value Pc in the wireless network is (current load value of AC1 + current load value of neighboring AC 2)/2, it should be noted that in an actual application scenario, the actual average load value in the wireless network may be determined according to the actual number of ACs in the wireless network; then, determining that the load value Ps of the AC1 which needs to be switched currently is equal to the current load value-Pc of the AC 1; finally, the AC1 sequentially determines a load influence value Pf of each AP of the at least one AP on the AC1, which is the number of terminals accessed by the AP + the number of AP flows, and sequentially determines which APs have a total Pf value close to Ps and which APs are the APs to be switched in the AC 1.
Step 205, notifying the AP to be switched to switch the active communication channel to the neighbor AC.
In this step, in conjunction with step 204, the AC1 notifies the AP needing to be switched to switch the active communication channel established in the AC1 to the AC2 to complete load sharing of the AC 1.
The load balancing method provided by the embodiment of the invention is applied to a wireless controller (AC) in a wireless network, the AC acquires load information of the AC, sends a load sharing request message to a neighbor AC when determining that the AC is overloaded, receives a response message sent by the neighbor AC, acquires a list of APs establishing a standby communication channel with the neighbor AC, determines at least one AP establishing a main communication channel with the AC according to the list of the APs, and can be used for switching, selects an AP needing to be switched from the at least one AP, and informs the AP needing to be switched to switch the main communication channel to the neighbor AC; the AP which needs to be switched is selected for switching, so that reasonable load distribution among the ACs is realized, the frequency of frequent switching of the AP is reduced, the stability of network load is guaranteed, the continuity of the service is maintained, and the quality of network service is improved.
As shown in fig. 3a, one of the flowcharts of another load balancing method provided in the embodiment of the present invention is applied to a wireless controller AC in a wireless network, and the method includes:
Step 301, receiving a load sharing request message sent by a neighbor AC.
The load sharing request message includes load information of neighbor ACs, where the load information includes but is not limited to a current load value of the neighbor ACs and a preset load threshold of the neighbor ACs, the relevant parameters of load balancing may be preset by the ACs according to actual conditions of the load sharing request message, and the relevant parameters of load balancing of each AC may be the same or different, and are not specifically limited herein.
To describe this step with reference to fig. 1, the AC2 receives a load sharing request message sent by the neighbor AC1, where the load sharing request message includes load information of the neighbor AC1, and the load information includes, but is not limited to, a current load value of the neighbor AC1 and a preset load threshold of the neighbor AC 1.
Step 302, according to the load information of the neighbor AC, determining whether a difference value between the current load of the neighbor AC and the current load of the neighbor AC is greater than a preset threshold value, if so, sending a response message to the neighbor AC.
The response message includes a list of APs establishing a standby communication channel with the AP, where the list of APs includes at least one AP establishing a primary communication channel with the neighbor AC.
In this step, in combination with step 301, the AC2 determines, according to the load information of the neighbor AC1, whether a difference value between a current load value of the neighbor AC1 and a current load value of the AC2 is greater than a preset threshold of AC2, and when | the current load value of the neighbor AC1 — the current load value of the AC2 | > is greater than the preset threshold, the AC2 sends a response message to the neighbor AC1, where the response message includes a list of APs that establish a standby communication channel with itself, and the list of APs includes at least one AP that establishes a primary communication channel with the neighbor AC1, so as to assist the neighbor AC in performing load sharing.
As shown in fig. 3b, a second load balancing method provided in the embodiment of the present invention, in addition to the steps shown in fig. 3a, after step 301 and before step 302, further includes:
and 303, judging that the current load value of the AC does not exceed the preset load threshold value of the AC by the AC, and determining that the AC is not overloaded.
In this step, in combination with the steps shown in fig. 3, the AC2 determines whether itself is overloaded according to its current load value and the preset load threshold, determines that the AC2 itself is not overloaded when the current load value of the AC2 does not exceed the preset load threshold of the AC2, and then continues to determine whether the difference between the current load of the neighboring AC1 and its current load is greater than the preset threshold, and further determines that the AC2 itself is overloaded when the AC2 determines that its current load value exceeds the preset load threshold of the AC2, and then the AC2 ends the subsequent method steps, which will not be specifically described herein.
The other load balancing method provided by the embodiment of the invention is applied to a wireless controller AC in a wireless network, the AC receives a load sharing request message sent by a neighbor AC, the load sharing request message comprises the load information of the neighbor AC, when the difference between the current load of the neighbor AC and the current load of the neighbor AC is greater than a preset threshold, sending a response message to the neighbor AC, acquiring a list of APs establishing a standby communication channel with the neighbor AC from the response message, the list of the APs includes at least one AP establishing a primary communication channel with the neighbor AC, so as to assist the neighbor AC in load sharing, reasonable load distribution is achieved between the ACs and the problem of maintaining continuity of traffic by reducing the frequency of traffic interruptions caused by frequent switching of APs if adjacent AC loads are not very different.
As shown in fig. 4, an embodiment of the present invention provides a wireless controller (AC)400, including:
a request module, configured to acquire load information of the AC, and send a load sharing request message to a neighboring AC when determining that the AC is overloaded, where the load sharing request message includes the load information of the AC;
a receiving module, configured to receive a response message sent by the neighbor AC, where the response message includes a list of APs that establish a standby communication channel with the neighbor AC;
a determining module, configured to determine, by the AC according to the list of APs, at least one AP that can be used for handover, where the at least one AP is an AP that establishes a primary communication channel with the AC;
a selection module, configured to select, by the AC, an AP that needs to be switched from the at least one AP according to a preset rule;
and the notifying module is used for notifying the AP needing to be switched to switch the main communication channel to the neighbor AC.
Wherein the load information of the AC comprises a current load value of the AC and a preset load threshold value.
Further, the request module is specifically configured to: the AC periodically polls the current load value and the preset load threshold value of the AC, when the current load value of the AC exceeds the preset load threshold value of the AC, the AC is determined to be overloaded, and a request message is sent to the neighbor AC to request the load sharing.
Further, the determining module is specifically configured to: the AC searches for an AP which has the same identification information as the AC and establishes a main communication channel with the AC itself in the list of the APs as at least one AP which can be used for switching on the AC; wherein, the identification information may be a MAC address.
The implementation principle and the generated technical effect of the AC400 provided by the embodiment of the present invention are the same as those of the foregoing method embodiments, and for brief description, corresponding contents in the method embodiment of fig. 2 may be referred to where no corresponding product embodiment is mentioned, and are not described herein again.
In an AC provided by the embodiments of the present invention, a request module of the AC acquires load information of the AC, and sends a load sharing request message to a neighboring AC when determining that the AC is overloaded, a receiving module receives a response message sent by the neighboring AC, and acquires a list of APs that establish a standby communication channel with the neighboring AC, a determining module determines at least one AP that establishes a main communication channel with the AC and is available for switching according to the list of APs, a selecting module selects an AP to be switched from the at least one AP through a preset rule, a notifying module notifies the AP to be switched to switch the main communication channel to the neighboring AC, and the selecting module selects the AP to be switched to switch, so as to implement reasonable load distribution between the ACs and reduce the frequency of frequent switching of the APs, thereby ensuring stability of network load and maintaining continuity of services, thereby improving the quality of network service.
As shown in fig. 5, another wireless controller (AC)500 provided in an embodiment of the present invention includes:
a receiving module, configured to receive a load sharing request message sent by a neighbor AC, where the load sharing request message includes load information of the neighbor AC;
the judging module is used for judging whether the difference value between the current load of the neighbor AC and the current load of the AC is larger than a preset threshold value or not according to the load information of the neighbor AC; if yes, the notification response module sends a response message to the neighbor AC;
and the response module is used for sending a response message to the neighbor AC when the judgment module judges whether the difference value between the current load of the neighbor AC and the current load of the AC is greater than a preset threshold value, wherein the response message comprises a list of APs establishing a standby communication channel with the AC, and the list of APs comprises at least one AP establishing a main communication channel with the neighbor AC.
Further, the determining module is configured to, after the receiving module receives the load sharing request message sent by the neighbor AC, determine whether a difference between a current load of the neighbor AC and a current load of the AC is greater than a preset threshold according to the load information of the neighbor AC, and further determine that the AC is not overloaded before determining that a current load value of the AC does not exceed the preset load threshold of the AC.
The implementation principle and the generated technical effect of the AC500 provided by the embodiment of the present invention are the same as those of the foregoing method embodiments, and for brief description, corresponding contents in the method embodiment of fig. 3 may be referred to where no corresponding product embodiment is mentioned, and are not described herein again.
In another wireless controller AC provided in the embodiment of the present invention, the receiving module of the AC receives a load sharing request message sent by a neighboring AC, the load sharing request message comprises the load information of the neighbor AC, and the judging module judges whether the load sharing request message comprises the load information of the neighbor AC, when the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value, sending a response message to the neighbor AC, acquiring a list of APs establishing a standby communication channel with the neighbor AC from the response message, the list of the APs includes at least one AP establishing a primary communication channel with the neighbor AC, so as to assist the neighbor AC in load sharing, reasonable load distribution is achieved between the ACs and the problem of maintaining continuity of traffic by reducing the frequency of traffic interruptions caused by frequent switching of APs if adjacent AC loads are not very different.
In the embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a notebook computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (11)

1. A load balancing method applied to a wireless controller (AC) in a wireless network is characterized by comprising the following steps:
the AC acquires load information of the AC and sends a load sharing request message to a neighbor AC when determining that the AC is overloaded, wherein the load sharing request message comprises the load information of the AC;
receiving a response message sent by the neighbor AC, wherein the response message comprises a list of APs establishing a standby communication channel with the neighbor AC;
the AC determines at least one AP which can be used for switching according to the list of the APs, wherein the at least one AP is an AP which establishes a main communication channel with the AC;
the AC selects an AP needing to be switched from the at least one AP through a preset rule;
and informing the AP needing to be switched to switch the main communication channel to the neighbor AC.
2. The load balancing method according to claim 1, wherein the load information includes a current load value and a preset load threshold of the AC, the AC acquires its own load information, and sends a load sharing request message to a neighboring AC when determining that it is overloaded, including:
the AC periodically polls the current load value and the preset load threshold value of the AC, determines that the AC is overloaded when the current load value of the AC exceeds the preset load threshold value of the AC, and sends a request message to the neighboring AC to request the load sharing.
3. The load balancing method according to claim 1 or 2, wherein the AC determines at least one AP available for handover according to the list of APs, specifically comprising:
the AC searches for an AP which has the same identification information and establishes a main communication channel with the AC in the list of the APs as at least one AP which can be used for switching on the AC; wherein, the identification information is a MAC address.
4. A load balancing method applied to a wireless controller (AC) in a wireless network is characterized by comprising the following steps:
receiving a load sharing request message sent by a neighbor AC, wherein the load sharing request message comprises load information of the neighbor AC;
Judging whether the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value or not according to the load information of the neighbor AC;
if so, sending a response message to the neighbor AC, wherein the response message comprises a list of APs establishing a standby communication channel with the neighbor AC; the list of APs includes at least one AP establishing a primary communication channel with the neighboring AC.
5. The load balancing method according to claim 4, wherein after receiving the load sharing request message sent by the neighbor AC, before the determining whether the difference between the current load of the neighbor AC and the current load of the neighbor AC is greater than a preset threshold, the method further comprises: and the AC judges that the current load value of the AC does not exceed the preset load threshold value of the AC, and determines that the AC is not overloaded.
6. A wireless controller (AC), comprising:
a request module, configured to acquire load information of the AC, and send a load sharing request message to a neighboring AC when determining that the AC is overloaded, where the load sharing request message includes the load information of the AC;
a receiving module, configured to receive a response message sent by the neighbor AC, where the response message includes a list of APs that establish a standby communication channel with the neighbor AC;
A determining module, configured to determine, by the AC according to the list of APs, at least one AP that can be used for handover, where the at least one AP is an AP that establishes a primary communication channel with the AC;
a selection module, configured to select, by the AC, an AP that needs to be switched from the at least one AP according to a preset rule;
and the notifying module is used for notifying the AP needing to be switched to switch the main communication channel to the neighbor AC.
7. The AC of claim 6, wherein the load information comprises a current load value of the AC and a preset load threshold, and wherein the request module is specifically configured to: the AC periodically polls the current load value and the preset load threshold value of the AC, determines that the AC is overloaded when the current load value of the AC exceeds the preset load threshold value of the AC, and sends a request message to the neighboring AC to request the load sharing.
8. The AC of claim 6 or 7, wherein the determination module is specifically configured to:
the AC searches for an AP which has the same identification information and establishes a main communication channel with the AC in the list of the APs as at least one AP which can be used for switching on the AC; wherein, the identification information is a MAC address.
9. A wireless controller (AC), comprising:
a receiving module, configured to receive a load sharing request message sent by a neighbor AC, where the load sharing request message includes load information of the neighbor AC;
the judging module is used for judging whether the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value or not according to the load information of the neighbor AC; if so, the notification response module sends a response message to the neighbor AC,
the response module is used for sending a response message to the neighbor AC when the judging module judges whether the difference value between the current load of the neighbor AC and the current load of the neighbor AC is larger than a preset threshold value, wherein the response message comprises a list of APs establishing a standby communication channel with the neighbor AC; the list of APs includes at least one AP establishing a primary communication channel with the neighboring AC.
10. The AC of claim 9, wherein the determining module, after receiving the load sharing request message sent by the neighbor AC, is further configured to determine that the current load value of the AC itself does not exceed the preset load threshold value of the AC before determining, according to the load information of the neighbor AC, whether a difference between the current load of the neighbor AC and the current load of the AC itself is greater than a preset threshold value, so as to determine that the AC itself is not overloaded.
11. A load balancing system for use in a wireless network, the system comprising a wireless controller AC according to any of claims 6 to 8 and an AC according to claim 9 or 10.
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