CN104735725B - Load-balancing method for WAP - Google Patents
Load-balancing method for WAP Download PDFInfo
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- CN104735725B CN104735725B CN201510179072.1A CN201510179072A CN104735725B CN 104735725 B CN104735725 B CN 104735725B CN 201510179072 A CN201510179072 A CN 201510179072A CN 104735725 B CN104735725 B CN 104735725B
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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
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Abstract
A kind of load-balancing method for WAP, AC establishes new client and AP relation corresponding tables, when receiving new client Access Request, AC detects the size of current AP flow, such as account for the proportion of total flow and current load number, to control AP to respond access to the client of request access, so as to realize all AP of AC controls load balancing.The present invention overloads after preventing from just starting in AP also setting a buffer time and client on-line time interval after AP starts because of AP caused by the access of a large amount of clients.Client is balancedly distributed on multiple AP of whole network by the present invention, existing method is overcome to judge whether client accesses the problem of bringing by signal intensity merely, equilibrium significantly improves the overall performance of network, and network transmission speed is higher, and Consumer's Experience is more comfortable.
Description
Technical field
The present invention relates to WLAN (WLAN, Wireless Local Area Network) field, and in particular to nothing
Line access control equipment (AC, Access Control) accesses the tune of WAP (AP, Access Point) to client
It is whole to realize the method for WAP load balancing.
Background technology
With the development of radio network technique, supported in the wireless network using multi-transceiver technology, multi-antenna technology etc.
Higher peak rate, minimum propagation delay time, so as to lift the performance of whole network.But load imbalance phenomenon is often deposited
, and the phenomenon has a strong impact on network performance.Occur frequently in and multiple AP are arranged in same region, but the meeting on some AP
Carry multiple client, and relative client is less on other AP.
Wlan network technology can allow user to enjoy the enjoyment moved freely.When a wireless client has been connected to one
Individual AP, it still can periodic scanning wireless channel.When it receives the RSSI that some AP signal intensity (RSSI) is better than current AP, that
The AP that client thinks new will provide more preferable quality of wireless services, and it will go to associate and be associated with new with original AP
On AP.The simple method for considering AP signals RSSI, it is easy to cause substantial amounts of client to be connected on same AP, due to these
Client shares wireless medium, causes the network throughput of each client will largely to reduce.
Therefore the agreement of ieee standard 802.11 for fully relying on existing wlan network is to be difficult to ensure that the property of wireless user
Can be with bandwidth.Because the agreement has given client the decision-making of radio roaming, but the not restricted client of agreement judges
The algorithm of roaming.Therefore a kind of method of wlan network urgent need balancedly shares wireless user (between multiple AP) in a network to realize
Load, to ensure the performance of network.
The content of the invention
The purpose of the present invention is to overcome the size of prior art basis signal intensity to determine that client accesses that AP's
Drawback.When receiving new client Access Request, detected by wireless access control equipment (AC) current AP flow it is big
It is small, such as the proportion of total flow and current load number are accounted for, to control AP to respond access to the client of request access, from
And realize all AP of AC controls load balancing.
To use following technical scheme up to this purpose, the present invention：
A kind of load-balancing method for WAP, comprise the following steps：
Step 110：After wireless access point AP is reached the standard grade, MAC the and RSSI information of new client is collected, and is cached, institute
State AP at regular intervals, by cache information, AP MAC and equipment user's number, that is, connected client, reported and wirelessly connect
Enter control device AC, after the completion of often reporting, remove caching record, AC is received report information after, using new client mac for index,
Establish the mapping table for the corresponding relation for embodying new client and AP equipment；
Step 120：After AP reached the standard grade more than buffer time, when new client sends message to AP, when request connects the AP,
The AP reports association request to AC, and the AC judges whether AP flow is excessive, or is connected to AP connection client
It is whether excessive, if AP flow less and be already connected to AP client it is few when, AP meets to require, it is allowed to the new client
End is connected to the AP, and enters step 160, otherwise, into step 130；
Step 130：According to the mapping table of new client and AP equipment, the signal intensity for having with former AP is searched whether
M poor absolute value is less than intensity threshold N associated AP, if so, then entering step S140, carries out load balancing judgement, no
Then, then allow the new client to be connected to the AP, and enter step 160；
Step 140：If the associated AP is 1, into step 141, if associated AP is multiple, into step
142,
Step 141, judge whether the flow of 1 associated AP is lower than current AP flow, and 1 associated AP
Whether load is less than load threshold, if it is, the AC refusals new client accesses current AP, it is allowed to the new client
Terminate into 1 associated AP, and enter step 150, otherwise, the AC allows the new client to be connected to current AP, and
Into step 160；
Step 142, AC detects all signal intensity M with current AP poor absolute value associating less than intensity threshold N
AP flow value, and arranged from small to large by uninterrupted, it is described if the load number of minimum flow is less than load threshold
The new client is allowed to access the associated AP, refusal accesses current AP, otherwise, then detection flows time minimum AP, Zhi Dao
The associated AP that load number is less than load threshold is found in preceding 2/3 ranking, the AC allows the new client to access the association
AP, and enter step 150, if the ranking preceding 2/3 does not find suitable associated AP, the AC allows the new client to connect
Current AP is connected to, and enters step 160；
Step 150：After current AP is connected to the AC response of refusal access, is sent to the new client and remove disassociation frame, refused
The connection of the exhausted new client, if the new client continues to connect current AP, refusal access；
Step 160：AP persistently monitors the number of the client of itself connection, is loaded when device clients number reaches highest,
Then enter stealth mode, while reported event notice AC；When client number falls back to closing threshold values on AP, then close and hide
Pattern, while reported event notice AC.
Preferably, between step S110 and step S120, also with step S150, within the buffer time, access
The time interval between client on to the AP should be more than threshold value.
Preferably, in the step 120, the AC judges whether AP flow is excessive, to judge the flow of the AP in institute
It is how many to state the total flow ranking in AP, and the AC judges whether the client of connection for being connected to AP is excessive, is determined for AC
Whether the load number for being connected to AP exceedes load threshold.
Preferably, it is how many to judge total flow ranking of the flow of the AP in the AP, to judge the AP in institute
State whether the total flow in AP exceedes the 1/3 of sum, i.e., if sum is n, AP flow comes the preceding n/3 of sum.
Preferably, the load threshold is rule of thumb set.
Preferably, the load threshold is the 40% of equipment maximum load.
Preferably, the threshold value, the buffer time, the threshold intensity and the closing threshold value can be rule of thumb
Selection.
Preferably, the threshold value is 8s, and the buffer time is 5min, and the threshold intensity is 10dBm, the closing
Threshold value is the 80% of AP maximum load numbers.
Preferably, in step 150, if the new client continues to connect current AP, when the new client the 4th
During the current AP of secondary connection, current AP allows the new client to connect.
To sum up, the present invention sets a buffer time after AP startups and client on-line time interval is firm in AP to prevent
Because AP overload caused by the access of a large amount of clients after startup, after buffer time, when a client accesses
Adjust the number clients of AP accesses by detecting access AP flow and load, using client and AP mapping tables by
Client is balancedly distributed on multiple AP of whole network, overcomes existing method to judge client by signal intensity merely
The problem of whether access is brought, equilibrium significantly improve the overall performance of network, and network transmission speed is higher, and Consumer's Experience is more
Comfortably.
Brief description of the drawings
Fig. 1 is the load-balancing method for WAP according to the present invention；
Fig. 2 is network interaction flow according to an embodiment of the invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Referring to Fig. 1, the load-balancing method for WAP according to the present invention is shown, is comprised the following steps：
Step 110：After wireless access point AP is reached the standard grade, new client is collected for example, by probe request message
MAC and RSSI information, and be cached, the AP at regular intervals, such as 10 seconds, by cache information, AP MAC and
Equipment user's number (having connected client) reports wireless access control equipment AC, after the completion of often reporting, removes caching record, AC
Receive after reporting information, using new client mac as index, establish the corresponding pass for the corresponding relation for embodying new client and AP equipment
It is table.
The new client is to wish the upper AP of connection new client.
Wherein, in the mapping table, a new client can correspond to multiple AP equipment.
Step 120：, please when new client sends auth request messages to AP after AP reached the standard grade more than buffer time
When seeking the connection AP, the AP reports association request to AC, and the AC judges whether AP flow is excessive, or is connected to AP's
Connected whether client excessive, if AP flow less and be already connected to AP client it is few when, AP meet require, permit
Perhaps described new client is connected to the AP, and enters step 160, otherwise, into step 130；
Wherein, the buffer time can be by empirically determined, preferably 5min.
Wherein, the AC judges whether AP flow is excessive, to judge total flow of the flow of the AP in the AP
Ranking is how many, for example whether more than the 1/3 of sum, i.e., if sum is n, AP flow comes the preceding n/3, the AC of sum
Judge whether the client of connection for being connected to AP is excessive, the load number for being connected to AP is determined for AC whether more than load threshold
Value, the load threshold are rule of thumb set, preferably the 40% of equipment maximum load.
Step 130：According to the mapping table of new client and AP equipment, the signal intensity for having with former AP is searched whether
M poor absolute value is less than intensity threshold N associated AP, if so, then entering step S140, carries out load balancing judgement, no
Then, then allow the new client to be connected to the AP, and enter step 160.
The threshold intensity is rule of thumb set, preferably 10dBm.
Step 140：If the associated AP is 1, into step 141, if associated AP is multiple, into step
142,
Step 141, judge whether the flow of 1 associated AP is lower than current AP flow, and 1 associated AP
Whether load is less than load threshold, if it is, the AC refusals new client accesses current AP, it is allowed to the new client
Terminate into 1 associated AP, and enter step 150, otherwise, the AC allows the new client to be connected to current AP, and
Into step 160.
Have by the step and then disperse client when can carry out load balancing, otherwise still there is original AP to be responsible for company
Connect.
Step 142, AC detects all signal intensity M with current AP poor absolute value associating less than intensity threshold N
AP flow value, and arranged from small to large by uninterrupted, it is described if the load number of minimum flow is less than load threshold
The new client is allowed to access the associated AP, refusal accesses current AP, otherwise, then detection flows time minimum AP, Zhi Dao
The associated AP that load number is less than load threshold is found in preceding 2/3 ranking, the AC allows the new client to access the association
AP, and enter step 150, if the ranking preceding 2/3 does not find suitable associated AP, the AC allows the new client to connect
Current AP is connected to, and enters step 160.
By the step, it is first determined whether having most suitable associated AP, if found all the time less than most suitable association
AP, then connection is still responsible for by original AP.
Step 150：After current AP is connected to the AC response of refusal access, is sent to the new client and remove disassociation frame, refused
The connection of the exhausted new client, if the new client continues to connect current AP, refusal access.
By the step, the new client to flow and will load relatively low associated AP and enter after former AP refusal is obtained
Row connection, it is achieved thereby that the equilibrium of load.
Preferably, continue to connect current AP for the new client, current AP is connected the 4th time when the new client
When, current AP allows the new client to connect.Therefore, by using the relief measure, avoid due to other reasons client
When end cannot connect to other associated APs, additionally it is possible to connected with former AP, realize online.
Step 160：AP persistently monitors the number of the client of itself connection, is loaded when device clients number reaches highest,
Then enter stealth mode, while reported event notice AC；When client number falls back to closing threshold values on AP, then close and hide
Pattern, while reported event notice AC.
The closing threshold value is rule of thumb set, it is preferred that can be the 80% of AP maximum load numbers.
Those skilled in the art understand that the stealth mode no longer allows new client to access.
It is further preferred that between step S110 and step S120, also with step S150, in the buffer time
Interior, threshold value should be more than by being linked into the time interval between the client on the AP, and the threshold value can be selected rule of thumb
Select, it is preferred that the threshold value is 8s.
So, client can be made slowly to be connected to the AP when AP just starts, it is therefore an objective to ensure that the AP will not be firm
Overloaded after startup because the connection number of distribution is excessive.
Referring to Fig. 2, an exemplary network interaction flow is shown.It will be appreciated by those skilled in the art that this is only
Be example and and it is non-limiting, the load balancing of the present invention can also be realized in the form of other messages.
Therefore, the present invention sets a buffer time after AP startups and client on-line time interval is firm in AP to prevent
Because AP overload caused by the access of a large amount of clients after startup.AP stream is accessed by detecting when a client accesses
Measure and load to adjust the number clients of AP accesses, be balancedly distributed in client with AP mapping tables using client
On multiple AP of whole network, existing method is overcome to judge whether client accesses asking of bringing by signal intensity merely
Topic, equilibrium significantly improve the overall performance of network, and network transmission speed is higher, and Consumer's Experience is more comfortable.
Obviously, it will be understood by those skilled in the art that above-mentioned each unit of the invention or each step can be with general
Computing device realizes that they can be concentrated on single computing device, alternatively, they can be can perform with computer installation
Program code realize, so as to being stored in storage device by computing device to perform, or by they point
Each integrated circuit modules are not fabricated to, or the multiple modules or step in them are fabricated to single integrated circuit module
Realize.So, the present invention is not restricted to the combination of any specific hardware and software.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The embodiment of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off
On the premise of from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention by institute
Claims of submission determine protection domain.
Claims (8)
1. for the load-balancing method of WAP, comprise the following steps：
Step 110：After wireless access point AP is reached the standard grade, MAC the and RSSI information of new client is collected, and is cached, the AP
At regular intervals, by cache information, AP MAC and equipment user's number, that is, client has been connected, has reported wireless access control
Control equipment AC, after the completion of often reporting, remove caching record, AC is received report information after, using new client mac for index, foundation
Embody the mapping table of the corresponding relation of new client and AP equipment；
Step 120：It is described when request connects the AP when new client sends message to AP after AP reached the standard grade more than buffer time
AP reports association request to AC, and the AC judges whether AP flow excessive, or be connected to AP the client of connection whether
Excessively, if AP flow less and be already connected to AP client it is few when, AP meets to require, it is allowed to which the new client connects
Be connected to the AP, and enter step 160, otherwise, into step 130, in the step 120, the AC judge AP flow whether mistake
Greatly, to judge that total flow ranking of the flow of the AP in the AP is how many, the AC judges to be connected to AP connection
Whether client is excessive, is determined for AC and is connected to AP load number and whether exceedes load threshold；
Step 130：According to the mapping table of new client and AP equipment, search whether to exist with former AP signal intensity M's
The absolute value of difference is less than intensity threshold N associated AP, if so, then entering step S140, carries out load balancing judgement, otherwise,
Then allow the new client to be connected to the AP, and enter step 160；
Step 140：If the associated AP is 1, into step 141, if associated AP is multiple, into step 142,
Step 141, judge whether the flow of 1 associated AP is lower than current AP flow, and the load of 1 associated AP
Whether load threshold is less than, if it is, the AC refusals new client accesses current AP, it is allowed to new client's termination
Enter 1 associated AP, and enter step 150, otherwise, the AC allows the new client to be connected to current AP, and enters
Step 160；
Step 142, AC detects all associated APs for being less than intensity threshold N with current AP signal intensity M poor absolute value
Flow value, and arranged from small to large by uninterrupted, if the load number of minimum flow is less than load threshold, the permission
The new client accesses the associated AP, and refusal accesses current AP, otherwise, then the minimum AP of detection flows time, until preceding 2/3
Ranking in find the associated AP that load number is less than load threshold, the AC allows the new client to access the associated AP, and
Into step 150, if the ranking preceding 2/3 does not find suitable associated AP, the AC allows the new client to be connected to
Current AP, and enter step 160；
Step 150：After current AP is connected to the AC response of refusal access, is sent to the new client and remove disassociation frame, refusal should
The connection of new client, if the new client continues to connect current AP, refusal access；
Step 160：AP persistently monitors the number of the client of itself connection, loads, then enters when device clients number reaches highest
Enter stealth mode, while reported event notice AC；When client number falls back to closing threshold values on AP, then close and hide mould
Formula, while reported event notice AC.
2. the load-balancing method according to claim 1 for WAP, it is characterised in that：
Between step S110 and step S120, also with step S115, within the buffer time, it is linked on the AP
Time interval between client should be more than threshold value.
3. the load-balancing method according to claim 2 for WAP, it is characterised in that：
It is how many to judge total flow ranking of the flow of the AP in the AP, to judge total streams of the AP in the AP
Whether amount exceedes the 1/3 of sum, i.e., if sum is n, and AP flow comes the preceding n/3 of sum.
4. the load-balancing method according to claim 2 for WAP, it is characterised in that：
The load threshold is rule of thumb set.
5. the load-balancing method according to claim 4 for WAP, it is characterised in that：
The load threshold is the 40% of equipment maximum load.
6. the load-balancing method according to claim 2 for WAP, it is characterised in that：
The threshold value, the buffer time, the threshold intensity and the closing threshold value can be selected rule of thumb.
7. the load-balancing method according to claim 6 for WAP, it is characterised in that：
The threshold value is 8s, and the buffer time is 5min, and the threshold intensity is 10dBm, it is described closing threshold value be AP most
The 80% of heavy load number.
8. the load-balancing method according to claim 1 for WAP, it is characterised in that：
In step 150, if the new client continues to connect current AP, current AP is connected the 4th time when the new client
When, current AP allows the new client to connect.
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| CN105246103B (en) * | 2015-09-23 | 2018-12-14 | 广东工业大学 | A kind of access method for equalizing load of WLAN |
| CN105764094A (en) * | 2016-02-04 | 2016-07-13 | 杭州华三通信技术有限公司 | Hybrid load balancing method and device |
| CN106102100B (en) * | 2016-06-23 | 2019-12-31 | 深圳市百米生活股份有限公司 | Access type and migration type wireless load balancing method |
| CN108541023A (en) * | 2017-03-03 | 2018-09-14 | 株式会社理光 | Load-balancing method and system and access controller |
| CN106998366B (en) * | 2017-05-23 | 2020-12-22 | 金华市智甄通信设备有限公司 | Cloud controller load balancing method and device and cloud controller |
| CN109219022A (en) * | 2017-06-29 | 2019-01-15 | 青岛恒金源电子科技有限公司 | A kind of cut-in method of Internet of Things |
| CN107567058A (en) * | 2017-08-16 | 2018-01-09 | 上海博达数据通信有限公司 | A kind of wireless controller and wireless load balancing method |
| CN107484228B (en) * | 2017-09-21 | 2020-01-07 | 杭州全维技术股份有限公司 | Method for simultaneously processing on-line of a large number of APs (access points) based on data traffic |
| CN107592643B (en) * | 2017-09-21 | 2020-04-10 | 杭州全维技术股份有限公司 | Method for simultaneously processing online of a large number of APs (access points) based on online user quantity |
| CN108449767B (en) * | 2018-06-29 | 2021-02-09 | 深圳市世纪本原科技股份有限公司 | Network load balancing method applied to WiFi roaming area |
| CN111107601B (en) * | 2019-12-31 | 2022-04-08 | 深圳创维数字技术有限公司 | Wireless network roaming method, device and medium |
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