CN107567058A - A kind of wireless controller and wireless load balancing method - Google Patents
A kind of wireless controller and wireless load balancing method Download PDFInfo
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- CN107567058A CN107567058A CN201710702394.9A CN201710702394A CN107567058A CN 107567058 A CN107567058 A CN 107567058A CN 201710702394 A CN201710702394 A CN 201710702394A CN 107567058 A CN107567058 A CN 107567058A
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Abstract
The invention discloses a kind of wireless controller and wireless load balancing method, this programme needs the load balancing group binding configured in AC to carry out the AP of load balancing on this basis by configuring related load balancing parameter on wireless controller；The flow and its probe frame received for the WAN mouths that AP timings report are collected by AC again；Optimal AP is finally loaded for its searching in terminal association according to the thresholding rule configured by AC.This load balancing scheme can flexibly select load model, and optimal load AP is chosen in the range of terminal finding, and the priority access of 5G frequency ranges is considered during load balancing, effectively can select suitable AP accesses for terminal, reach the effect of load balancing.
Description
Technical field
The present invention relates to wireless communication field, is more particularly to wireless network and accesses situation progress load balancing according to terminal
Technology.
Background technology
At present, the covering of wireless network is increasingly universal, and increasing wireless coverage uses Fit AP+AC (thin AP+
Wireless controller) the network architecture, be easy to be managed collectively wireless network.But due to the shifting of STA in WLAN
The time-varying characteristics of dynamic characteristic and wireless channel, it may appear that the problem of greatly different is loaded between AP, reduces the efficiency and property of wireless network
Energy, increases the risk of localized network congestion, and resource utilization is poor.
Therefore, in order to improve wireless network access performance, it certainly will require preferably to balance and load between each AP, optimize STA
Selection during AP is accessed, this just needs AC more accurately to grasp each AP loading condition, is done preferably for it when STA accesses
Access guiding.And how then to be solved in the visible AP of STA for its AP that selection resource is best, load is minimum as this area
Technical problem certainly.
The content of the invention
For accessing randomness during AP due to wireless terminal, cause to load inequality between AP, can not make full use of wireless
The problem of channel resource, is, it is necessary to a kind of efficient wireless load balancing scheme.
Therefore, it is an object of the invention to provide a kind of wireless controller and wireless load balancing method, it is controlled by AC
AP between load balancing, flexibly selection judge load pattern, be the optimal access AP of STA demands, make full use of wirelessly
Network existing resource, reduce network congestion.
In order to achieve the above object, a kind of wireless controller provided by the invention, is configured thereon：
Index module：Different load balancing configurations is indicated, the terminal of the balanced group of respective load is added for binding；
Name module：Load balancing group name is named, for load balancing group corresponding to the binding in radio configuration；
Mode module：The pattern of load balancing is set；
Threshold value module：The pattern limited according to mode module, indicate corresponding difference limitation between different AP；
Frequency range threshold value module：The pattern limited according to mode module, indicate the corresponding difference limitation of each frequency range；
Maximum times relating module：Indicate that allowed terminal is attempted to associate corresponding AP maximum times.
Further, the load balancing configuration that the index module determines is write as the quantity of load balancing group is automatically cumulative
Enter database table entry；
The load-sharing mode that the mode module is set is user model or flow rate mode；
The threshold value module is corresponding with mode module, if mode module is configured to user model, threshold value module
For terminal quantity, the maximum difference that terminal quantity is associated under each wireless mouth is identified；If mode module is configured to flow rate mode,
Then threshold value module is directed to the WAN mouth flows for AP, identifies each AP WAN mouth maximum flux differences；
The frequency range threshold value module is corresponding with mode module, negative for being done between identical ssid 2.4G and 5G ports
Carry and judge, if mode module is configured to user model, frequency range threshold value module is directed to terminal quantity, mark 2.4G and 5G ports
The maximum difference of lower association terminal quantity；If mode module is configured to flow rate mode, frequency range threshold value module is directed to AP WAN
Mouth flow, AP WAN mouth maximum flux differences where identifying 2.4G and 5G.
Refuse its access because load balancing detects when the maximum times relating module is used to limit terminal access
Number, and then allowing it to access more than this value, it is unlikely to because load balancing causes user can not access network.
Further, the wireless controller completes module with postponing, and it configures load balancing write-in pair accordingly
The database table entry answered, while phase modulation answers command interface notice wireless module reading to configure accordingly and be applied to wireless controller
Load balancing judge in.
In order to achieve the above object, wireless load balancing method provided by the invention, it includes：
The load balancing group binding configured in AC is needed to carry out the AP of load balancing；
AC collects the flow and its probe frame received for the WAN mouths that AP timings report；
AC loads optimal AP in terminal association according to the deviation threshold rule configured for its searching.
Further, the AC for associated terminal when finding the optimal AP of load, and AC parsing probe frames are visible by terminal
VAP information be added in terminal structure in corresponding VAP tables, and band information is added in VAP structure, it is possible thereby to
Obtain the frequency range that per the visible VAP situations of station terminal and terminal is supported.
Further, probe frames addition terminal surrounding VAP is handled to comprise the following steps：
(1) AC is collected by capwap tunnels and is received the probe frames that terminal reports by AP parsings, and by radio information,
The probe frames that wlan information, terminal mac addresses and semaphore are encapsulated and uploaded；
(2) AC bss according to corresponding to radio the and wlan information searchings parsed in the probe received whether there is, if
In the absence of then losing；
(3) search corresponding A P whether there is, lost if in the absence of if；
(4) search corresponding VAP whether there is, lost if in the absence of if；
(5) if traversal terminal table terminal, which is not present to increase, adds terminal to terminal table, the terminal table is created by AC and maintenance, deposits
Then entering in next step.
(6) the VAP tables of the terminal are traveled through, VAP added to VAP tables and is added into the frequency of the VAP if in the absence of current VAP
Segment information, if updating band information in the presence of if.
Further, the AC when finding the optimal AP of load for associated terminal, look for first by VAP tables corresponding to traversal terminal
The VAP minimum to load, VAP load then is associated to current request and minimum load does thresholding judgement, is then permitted in thresholding
Perhaps current VAP is accessed, otherwise load balancing judges failure, and refusal terminal access allows it to initiate association request, repeated boad again
Balanced deterministic process.
Further, when finding the minimum VAP of load, the judgement that 5G is preferably accessed is carried out.
Further, load balance process is carried out to access terminal, comprised the following steps：
(1) AC to initiation reach the standard grade request terminal judge its initiate association request AP whether open load-balancing function,
Load balancing judgement is skipped if not, it is allowed to access；If it was found that the terminal is already present in online terminal table, equally skip
Load balancing judges；
(2) check that the load balancing group of AP configurations whether there is, judge if skipping load balancing in the absence of if, it is allowed to connect
Enter；
(3) check that the VAP of terminal request whether there is in the VAP tables of corresponding load balancing group binding, if in the absence of if
Skip load balancing judgement, it is allowed to access；
(4) terminal is checked whether in the terminal table created according to probe frames, if adding terminal in the absence of if to terminal
Table, if in the presence of into (6) step；
(5) if terminal addition failure, then skip load balancing judgement, it is allowed to access；
(6) certification number adds one corresponding to terminal；
(7) judge whether the certification number of terminal reaches maximum attempts threshold value, allow to access if reaching.
(8) the visible minimum load VAP of terminal is searched, 5G and 2.4G are corresponded into minimum load VAP first and are initialized as sky
Min [0]=min [1]=NULL, b=(vap->Radio_id==RADIO_5G)；
(9) the VAP tables of terminal are traveled through, if the unbound current load balancing groups of VAP, skip the VAP, continue to travel through；
(10) if 5G or 2.4G minimum loads VAP is sky, min [b]=vap, rebound step (9)；
(11) if finding, current VAP loads are less than min [b], min [b]=vap, rebound step (9)；
(12) the preferential thresholdings of 5G are more than to 5G the and 2.4G VAP of the minimum load of the acquisition differences loaded, then minimum load
VAP takes 2.4G VAP, otherwise takes 5G VAP；
(13) if the above-mentioned minimum load VAP found is sky in load balancing deterministic process, allow to access；
(14) if current VAP is equal to minimum load VAP, load balancing judgement is skipped, it is allowed to access；
(15) if current VAP frequency ranges are consistent with minimum load VAP frequency ranges, if the difference of the two load is less than load balancing thresholding
Value, then allow to access.Then refuse to access more than thresholding, rebound step (1)；
(16) if current VAP frequency ranges and minimum load VAP frequency ranges are inconsistent, if the difference of the two load is less than the preferential thresholdings of 5G
Value, then allow to access.Then refuse to access more than thresholding, rebound step (1).
Load-balancing method provided by the invention can flexibly select load model, be chosen most in the range of terminal finding
Excellent load AP, and consider during load balancing the priority access of 5G frequency ranges, effectively it can select suitable AP for terminal
Access, reach the effect of load balancing.
Meanwhile the main distinction of load balancing provided by the invention and conventional load balancing technique is several aspects：
(1) flexible model selection
Relative to traditional load balancing often with terminal pattern, and this programme can be selected flexibly with terminal pattern
Or flow rate mode carries out load balancing.
(2) terminal is precisely located
AP is often taken to reach the terminal just kicked off after terminal access quantity limits and newly added relative to traditional technology
Mode carry out load balancing, do not account for whether STA can see that other AP, there is terminal can not access any AP
Risk.The load balancing scheme of this optimization grasps the situation of AP around STA in real time by parsing probe frames, visible in STA
In the range of for it carry out the AP that can access of planning, make the access of terminal more reasonable, and ensure that terminal may finally access
Network.
(3) 5G advantages are played
The superiority bandwidth of 5G frequency ranges is not accounted for relative to conventional load equilibrium, the load balancing scheme of this optimization is to end
When terminating into AP is switched over, if STA supports 5G frequency ranges, STA priority access 5G frequency ranges are allowed in threshold range.
(4) in terms of function
This programme can configure the different AP of load balancing group binding of multiple different threshold values or pattern, therefore can spirit
Varying environment residing for the different AP of living adaptation, reach and point utilize network existing resource, reduce the purpose of network congestion.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is network topological diagram basic in present example；
Fig. 2 is the schematic flow sheet that AP uploads flow in present example；
Fig. 3 is that the schematic flow sheet that probe frames add terminal surrounding VAP is handled in the present invention；
It is that sta finds the minimum vap schematic diagrames of load in the present invention that Fig. 4, which is,.
Fig. 5 is to carry out load balance process schematic diagram to access terminal in the present invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Currently, it is fast-developing based on IEEE802.11 wireless local area network technologies, it is more next by wirelessly accessing the internet mode
More extensive to be liked by people, all there is wlan covering and present a rapidly rising trend in many Environment spaces.But with nothing
Terminal increases in gauze network, and the fluctuation of its mobility and data traffic can cause whole network load to vary widely,
There is the uneven situation of distribution in channel used in AP, causes the waste of whole network channel resource.
On the other hand, this programme provides a kind of wireless controller (i.e. AC, same as below), realization is negative between this AC can control AP
Carry balanced, it can flexibly select the pattern for judging load, be the optimal access AP of STA demands, solve wireless network with this
Network terminal accesses the problem of load imbalance, makes full use of wireless network existing resource, reduces network congestion.
This AC under the wireless network architecture of Fit AP+AC (thin AP+ wireless controllers) (referring to Fig. 1), based on collect AP
Under terminal quantity or the information such as uninterrupted to weigh AP loads, and then find more suitable AP for terminal access.
Therefore, the AC in this programme configures corresponding parameter by following configuration module, load balancing is realized with this
Control：
num：For identifying on AC the balanced group quantity of configuration load, if having it is a plurality of if correspond to num values and add up one by one, main use
Seen in AC up-regulation audit trials, practical function is not played in load-balancing function.
Index (index module)：Different load balancing groups is identified, in newly-increased load balancing group, database background application is write
Database adds up automatically, and (the load balancing configuration determined writes number to the index as the quantity of load balancing group adds up automatically
According to storehouse list item), it is mainly used in AC up-regulation audit trials and sees, practical function is not played in load-balancing function.
Name (name module)：Load balancing group name, for being bound in AC configuration interfaces and the wireless mouths of AP, i.e., to some
AP opens the load balancing of corresponding title.
Mode (mode module)：The pattern of load balancing is indicated, is user model, or flow rate mode, under user model
The terminal quantity associated using under each radio port as load balancing judge, flow rate mode then using individual AP WAN mouths flow as
Load balancing judges.
Threshold (threshold value module)：Number of users or flow difference limitation between different AP are indicated, it is corresponding with mode, if
Selecting user model, then threshold is terminal quantity, the maximum difference that terminal quantity is associated under each wireless mouth is identified, if choosing
The flow rate mode WAN mouth flows that then threshold is AP are selected, identify each AP WAN mouth maximum flux differences.
5G_threshold (frequency range threshold value module):Indicate 5G frequency ranges and 2.4G frequency range numbers of users in the case of identical ssid
Or flow difference limitation, it is corresponding with mode；5G_threshold is terminal quantity if user model is selected, and identifies 2.4G and 5G
The maximum difference of terminal quantity is associated under port, 5G_threshold is AP WAN mouth flows if flow rate mode is selected, and is identified
AP WAN mouth maximum flux differences where 2.4G and 5G.
Max_auth (maximum times relating module)：Indicate that allowed terminal is attempted to associate some AP maximum times.I.e.
Refuse the number of its access because load balancing detects when terminal accesses, if more than allowing if this value it to access, being unlikely to because
Load balancing causes user can not access network.
Thus the wireless controller set, it is corresponding to configure corresponding module can be called in the administration interface of wireless controller
Parameters, configured relevant parameter click on submit, its backstage can configure load balancing corresponding to write-in accordingly at that time
Database table entry；Meanwhile backstage can also phase modulation answer command interface notice wireless module read configure accordingly and be applied to AC
During load balancing judges.
Specifically, the relevant information of all load balancing groups configured on AC can be checked by issuing orders：
[root@localhost SAC_beta_1_1]#debug info hostapd@dbac lbg all
Administration interface of these parameters in AC is configured, backstage write into Databasce, and notice wireless module adds these letters
Cease in wireless topology.
The AC formed accordingly carries out load balancing under the wireless network architecture of Fit AP+AC (thin AP+ wireless controllers)
During control, it opens AP relevant informations firstly, it is necessary to the load balancing group binding of configuration is needed to carry out the AP of load balancing
Timing reports；Here information mainly includes the flow of WAN mouths and the probe frames received.
Then, according to the good deviation threshold rule of predefined, optimal AP is loaded for its searching in terminal association, here
Deviation threshold rule by the maximum load difference that allows between different radio port, be then different radio for user model
The number of users difference that port is accessed below, for flow rate mode then WAN mouth flow differences between different AP.
However, for terminal (i.e. STA, same as below) STA of any one initiation association, in its access load
Weighing apparatus might have following situation when checking occurs：
1st, for terminal selection the optimal AP of load not necessarily in the visible range of terminal；
2nd, when doing the judgement of 5G priority access, some terminals may only support the wireless of single frequency range；
3rd, the stubborn terminal of some comparisons can adhere to associating the AP that AC thinks load excessive.
According to above-mentioned three kinds of situations, the control process that this AC carries out load balancing for the terminal of association is specific as follows：
(1) AC obtains the flow for the WAN mouths that AP is reported；
(2) AC obtains the probe frames for receiving terminal and reporting that AP is reported；
(3) AC parses the probe frames that AP is reported, and VAP information is added in STA structures in corresponding VAP tables, and will frequency
Segment information is added in VAP structure, it is possible thereby to obtain the visible VAP situations of every station terminal, also would know that what terminal was supported
Frequency range；
(4) AC, if the number that terminal attempts association has reached max_auth, permits when terminal association carries out load balancing
Perhaps it is associated.Otherwise, subterminal VAP tables are traveled through, according to the load-sharing mode of configuration, select wherein associated terminal number minimum
Or VAP that flow is minimum allow terminal to be associated, 2.4G the and 5G ends of minimum load can be obtained respectively after traversal
Mouthful, the difference then loaded to 2.4G the and 5G ports selected carries out 5G priority access compared with 5G_threshold
Judgement, if that terminal currently associates is exactly this VAP, directly allow it to associate, otherwise terminal number of attempt adds one, repeats
This step.
AC realizes the process of control load balancing accordingly, and its selection mode is flexible, and the visible AP of positioning terminal is accurate, while energy
5G superiority bandwidths are enough played, more reasonably find optimal load AP, are finally reached the effect of load balancing.
For above-mentioned load balancing implementation, illustrated below by way of corresponding example.
This example is by load balancing, either flow rate mode or terminal pattern between AC controls AP, and AC is by knowing
Every AP loading condition, and to consider target AP in terminal finding for optimizing per station terminal when it associates minimum load AP
In the range of, the difference of frequency range is further contemplated compared with during in progress duty factor.
Accordingly, the implementation by load balancing between AC controls AP in this example is as follows：
(a) AC gathers the flow for the WAN mouths that AP is reported；
(b) AC gathers the probe frames received that AP is reported；
(c) AC finds optimal load AP accesses using the data that above two steps are obtained as foundation for associated terminal.
Wherein, Fit AP+AC (thin AP+ wireless controllers) wireless network architecture (as shown in Figure 1) is based in this example,
Radio configuration is uniformly issued by AC, realizes communication (as shown in Figure 2) by capwap tunnels between AC, AP, correlative flow reports
Idiographic flow be (as shown in Figure 2)：
(1) had when AC interface configurations wireless parameter and be set to corresponding A P ends under the enabled switch of a load balancing,
The parameter, which is read, when AP ends learns that WAN mouth flows on AP are read in then registration when being that it has bound load-balancing function on AC
Timer (time-out time is set to 5s).
(2) the WAN transceiving data information under timer processing function reading/sys/class/net/, then passes through
Capwap passages reach data on AC, and flow rate timer is read in registration again afterwards.
(3) repeat step 2 is until load-balancing function is closed.
By the program, AC will obtain the renewal of AP WAN mouth datas on flows every 5s, be easy to grasp every AP in real time
Load state, the terminal quantity associated as WLAN mouths on AP, because under the networking mode inquired into of the present invention, terminal is recognized
Card access is completed in AC sides, so there have been the data of terminal connection on each AP AC sides.
Furthermore the probe information of AP reporting terminals, to AC, AC can be to grasp the visible VAP of specific each terminal
Situation and terminal support the situation of radio band, create and safeguard a terminal table for load balancing, and by the visible VAP of terminal
Information is added in VAP tables corresponding to terminal, reasonably terminal can be accessed with more efficient when carrying out load balancing
Guide (as shown in Figure 3).Concrete scheme is as follows：
(1) AP sides detect that load balancing opens the probe information reporting flows of then triggering terminal.
(2) the probe frames that parsing AP is received, radio information, wlan information, terminal mac addresses and semaphore are encapsulated
To upload AC by capwap tunnels.
(3) AC bss according to corresponding to radio the and wlan information searchings parsed in the probe received whether there is, if
In the absence of then losing.
(4) search corresponding A P whether there is, lost if in the absence of if.
(5) search corresponding VAP whether there is, lost if in the absence of if.
(6) terminal is added to exist and then enter in next step to terminal table if traversal terminal table terminal is not present to increase.
(7) the VAP tables of the terminal are traveled through, VAP added to VAP tables and is added into the frequency of the VAP if in the absence of current VAP
Segment information, if updating band information in the presence of if.
So, AC carry out load balancing when can according to terminal table grasp in real time terminal and around it VAP situation,
When selecting optimal load AP for it can it is more accurate also, be more rationally terminal table opening timing mechanism on AC, to remove table
In expired end message.
On the basis of such scheme, in this example, AC carries out load balancing judgement when terminal accesses, and it is traveled through first
VAP tables corresponding to terminal find the minimum VAP of load, wherein to consider that the superiority bandwidth of 5G frequency ranges (carries out 5G priority access
Judgement, detailed process is as shown in Figure 4), VAP load then is associated to current request and minimum load does thresholding judgement,
Then allow to access current VAP in thresholding, otherwise load balancing judges failure, and refusal terminal access allows it to initiate association again please
Ask, repeated boad equilibrium deterministic process.Idiographic flow is following (as shown in Figure 5)：
(1) to initiation reach the standard grade request terminal judge its initiate association request AP whether open load-balancing function, if
Load balancing judgement is not skipped then, it is allowed to is accessed；Or find that the terminal is already present in online terminal table, equally skip
Load balancing judges.
(2) check that the load balancing group of AP configurations whether there is, judge if skipping load balancing in the absence of if, it is allowed to connect
Enter.
(3) check that the VAP of terminal request whether there is in the VAP tables of corresponding load balancing group binding, if in the absence of if
Skip load balancing judgement, it is allowed to access.
(4) terminal is checked whether in the terminal table created according to probe frames, if adding terminal in the absence of if to terminal
Table, if in the presence of into the 6th step.
(5) if terminal addition failure, then skip load balancing judgement, it is allowed to access.
(6) certification number adds one corresponding to terminal.
(7) judge whether the certification number of terminal reaches maximum attempts threshold value, allow to access if reaching.
(8) the visible minimum load VAP of terminal is searched, 5G and 2.4G are corresponded into minimum load VAP first and are initialized as sky
Min [0]=min [1]=NULL, b=(vap->Radio_id==RADIO_5G).
(9) the VAP tables of terminal are traveled through, if the unbound current load balancing groups of VAP, skip the VAP, continue to travel through.
(10) if 5G or 2.4G minimum loads VAP is sky, min [b]=vap, rebound step 9.
(11) if finding, current VAP loads are less than min [b], min [b]=vap, rebound step 9.
(12) the preferential thresholdings of 5G are more than to 5G the and 2.4G VAP of the minimum load of the acquisition differences loaded, then minimum load
VAP takes 2.4G VAP, otherwise takes 5G VAP (as shown in Figure 4).
(13) if the above-mentioned minimum load VAP found is sky in load balancing deterministic process, allow to access.
(14) if current VAP is equal to minimum load VAP, load balancing judgement is skipped, it is allowed to access.
(15) if current VAP frequency ranges are consistent with minimum load VAP frequency ranges, if the difference of the two load is less than load balancing thresholding
Value, then allow to access；Refuse to access if load balancing threshold value is more than, rebound step 1.
(16) if current VAP frequency ranges and minimum load VAP frequency ranges are inconsistent, if the difference of the two load is less than the preferential thresholdings of 5G
Value, then allow to access；Refuse to access if the preferential threshold values of 5G are more than, rebound step 1.
By above-mentioned load balancing process, AP accurately rationally can be accessed for terminal searches optimal load, while fully
Consider and played the superiority bandwidth of 5G frequency ranges, make full use of channel resource, reach preferable load balancing effect.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (9)
1. a kind of wireless controller, it is characterised in that configured on the wireless controller：
Index module：Different load balancing configurations is indicated, the terminal of the balanced group of respective load is added for binding；
Name module：Load balancing group name is named, for load balancing group corresponding to the binding in radio configuration；
Mode module：The pattern of load balancing is set；
Threshold value module：The pattern limited according to mode module, indicate corresponding difference limitation between different AP；
Frequency range threshold value module：The pattern limited according to mode module, indicate the corresponding difference limitation of each frequency range；
Maximum times relating module：Indicate that allowed terminal is attempted to associate corresponding AP maximum times.
2. wireless controller according to claim 1, it is characterised in that the load balancing configuration that the index module determines
As the quantity of load balancing group adds up write into Databasce list item automatically；
The load-sharing mode that the mode module is set is user model or flow rate mode；
The threshold value module is corresponding with mode module, if mode module is configured to user model, threshold value module is directed to
Terminal quantity, identify the maximum difference that terminal quantity is associated under each wireless mouth；If mode module is configured to flow rate mode, door
Limit module is directed to the WAN mouth flows for AP, identifies each AP WAN mouth maximum flux differences；
The frequency range threshold value module is corresponding with mode module, sentences for doing load between identical ssid 2.4G and 5G ports
Disconnected, if mode module is configured to user model, frequency range threshold value module is directed to terminal quantity, identifies 2.4G and 5G ports ShiShimonoseki
Join the maximum difference of terminal quantity；If mode module is configured to flow rate mode, frequency range threshold value module is directed to AP WAN mouth streams
Amount, AP WAN mouth maximum flux differences where identifying 2.4G and 5G.
Refuse the number of its access because load balancing detects when the maximum times relating module is used to limit terminal access,
And then allowing it to access more than this value, it is unlikely to because load balancing causes user can not access network.
3. wireless controller according to claim 1, it is characterised in that the wireless controller completes module configuration
Afterwards, it configures load balancing database table entry corresponding to write-in accordingly, while phase modulation answers command interface to notify wireless module
Read in the corresponding load balancing judgement for configuring and being applied to wireless controller.
4. wireless load balancing method, it is characterised in that including：
The load balancing group binding configured in AC is needed to carry out the AP of load balancing；
AC collects the flow and its probe frame received for the WAN mouths that AP timings report；
AC loads optimal AP in terminal association according to the deviation threshold rule configured for its searching.
5. wireless load balancing method according to claim 4, it is characterised in that the AC is born for associated terminal searching
When carrying optimal AP, AC parsing probe frames, the visible VAP information of terminal is added in terminal structure in corresponding VAP tables, and
Band information is added in VAP structure, it is possible thereby to obtain the frequency that the visible VAP situations of every station terminal and terminal are supported
Section.
6. wireless load balancing method according to claim 5, it is characterised in that processing probe frame addition terminal surroundings
VAP comprises the following steps：
(1) AC collects the probe frames for being received terminal by AP parsings and being reported by capwap tunnels, and radio information, wlan are believed
The probe frames that breath, terminal mac addresses and semaphore are encapsulated and uploaded；
(2) AC bss according to corresponding to radio the and wlan information searchings parsed in the probe received whether there is, if not depositing
Then losing；
(3) search corresponding A P whether there is, lost if in the absence of if；
(4) search corresponding VAP whether there is, lost if in the absence of if；
(5) if traversal terminal table terminal, which is not present to increase, adds terminal to terminal table, the terminal table is created by AC and maintenance, exists then
Into in next step.
(6) the VAP tables of the terminal are traveled through, believe the frequency range that VAP is added to VAP tables and adds the VAP if in the absence of current VAP
Breath, if updating band information in the presence of if.
7. wireless load balancing method according to claim 4, it is characterised in that the AC is born for associated terminal searching
When carrying optimal AP, VAP tables corresponding to traversal terminal find the minimum VAP of load first, and then current request association VAP is born
Carry and minimum load does thresholding judgement, then allow to access current VAP in thresholding, otherwise load balancing judges failure, and refusal is eventually
Terminate into allowing it to initiate association request, repeated boad equilibrium deterministic process again.
8. wireless load balancing method according to claim 8, it is characterised in that when finding the minimum VAP of load, carry out 5G
It is preferred that the judgement accessed.
9. the wireless load balancing method according to claim 7 or 8, it is characterised in that to access terminal load
Weighing apparatus processing, comprises the following steps：
(1) AC to initiation reach the standard grade request terminal judge its initiate association request AP whether open load-balancing function, if not having
Have, skip load balancing judgement, it is allowed to access；If it was found that the terminal is already present in online terminal table, load is equally skipped
Equilibrium judges；
(2) check that the load balancing group of AP configurations whether there is, judge if skipping load balancing in the absence of if, it is allowed to access；
(3) check that the VAP of terminal request whether there is in the VAP tables of corresponding load balancing group binding, skipped if in the absence of if
Load balancing judges, it is allowed to accesses；
(4) terminal is checked whether in the terminal table created according to probe frames, if adding terminal in the absence of if to terminal table,
If in the presence of into (6) step；
(5) if terminal addition failure, then skip load balancing judgement, it is allowed to access；
(6) certification number adds one corresponding to terminal；
(7) judge whether the certification number of terminal reaches maximum attempts threshold value, allow to access if reaching；
(8) the visible minimum load VAP of terminal is searched, 5G and 2.4G are corresponded into minimum load VAP first and are initialized as sky min
[0]=min [1]=NULL, b=(vap->Radio_id==RADIO_5G)；
(9) the VAP tables of terminal are traveled through, if the unbound current load balancing groups of VAP, skip the VAP, continue to travel through；
(10) if 5G or 2.4G minimum loads VAP is sky, min [b]=vap, rebound step (9)；
(11) if finding, current VAP loads are less than min [b], min [b]=vap, rebound step (9)；
(12) the preferential thresholdings of 5G are more than to 5G the and 2.4G VAP of the minimum load of the acquisition differences loaded, then minimum load VAP takes
2.4G VAP, otherwise take 5G VAP；
(13) if the above-mentioned minimum load VAP found is sky in load balancing deterministic process, allow to access；
(14) if current VAP is equal to minimum load VAP, load balancing judgement is skipped, it is allowed to access；
(15) if current VAP frequency ranges are consistent with minimum load VAP frequency ranges, if the difference of the two load is less than load balancing threshold value,
Then allow to access.Then refuse to access more than thresholding, rebound step (1)；
(16) if current VAP frequency ranges and minimum load VAP frequency ranges are inconsistent, if the difference of the two load is less than the preferential threshold values of 5G,
Then allow to access.Then refuse to access more than thresholding, rebound step (1).
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| CN110719609A (en) * | 2019-10-29 | 2020-01-21 | 江苏百卓智能科技有限公司 | Wireless AP equipment |
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