CN103313306A - WLAN load balancing method, device and system - Google Patents
WLAN load balancing method, device and system Download PDFInfo
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Abstract
The invention provides a WLAN load balancing method, a device and a system. The method comprises the following steps that: a WLAN scan request AP (access point) sent by a STA (station) is received; load information of the AP, network performance acquired by the AP, and network quality information are sent to an AC (access controller); the AC determines the AP needed to be connected by the STA according to the load information, network performance and network quality of each AP; and the AP of receiving the WLAN scan request sends the AP needed to be connected by the STA to the STA so that the STA initiates association with the AP needed to be connected by the STA. According to the invention, the problems of the inefficient STA network connection caused by an association-to-decision manner in the prior art and the problem of the poor user experience are solved. Furthermore, in the embodiment of the invention, the AP load information, network performance and network quality are taken into a full account to decide the load balancing, so that the load balancing decision is perfected; the whole network resource is fully used; and the load balancing can give a full play.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to method, the Apparatus and system of a kind of WLAN (wireless local area network) (WLAN) load balancing.
Background technology
At WLAN (wireless local area network) (Wireless Local Area Networks, WLAN) the intensive area of network design, often need between the equipment by load-balancing technique so that uniformly access service of the user of wlan network, thereby improve service quality and the service efficiency of network.
In traditional fat WAP (wireless access point) (FAT AP) framework, AP has independently born the role of WAP (wireless access point).Terminal (STA, Station) load balancing under the FAT AP framework is by STA self realization, and idiographic flow is as follows:
1, carries out information interaction by the wireless message of Probe Request/Response between STA and the AP;
2, AP is to the load of STA announcement oneself, and STA records the loading condition of corresponding A P from this message;
3, STA accesses according to the lightest AP of self algorithm picks load.
Under the FAT AP framework, the power of whether carrying out load balancing, give STA and made a strategic decision, be unfavorable for that WLAN the whole network dispatches, realized the unified load balancing of the whole network.
In thin AP (FIT AP) framework, wireless controller (Access Controller, AC) is in charge of a plurality of FITAP of same control and management, and AC sends configuration and other control information to FITAP, with the AP exchange security information, obtain the service datas such as state of AP.Under the FIT AP framework, the STA load balancing is made a strategic decision by AC is unified, and idiographic flow is as follows:
1, carries out information interaction by the wireless message of Probe Request/Response between STA and the AP;
2, AP uploads the load information of AP by proprietary protocol, and AC records the load information of each AP,
3, STA selects an AP to begin association, sends related request (association request) to AP, and AP transmits association request to AC (standard step of Split MAC framework).At this moment, AC in step 1,2, the AP tabulation that the load information of having known AP and STA can be related.AC judges whether to allow this STA to be connected to this AP according to the STA load balancing.
If 4 do not allow, AC returns associated response (association response) to STA to AP, stops association, provides among the association response and is undertaken again related through the underload AP after the decision-making by STA.If allow, AC returns association response to AP, carries the cause for the success code.
Load-balancing mechanism under the thin AP architecture, have following problem: could being made a strategic decision according to load-balancing mechanism by AC after the first associated AP of STA needs, whether it can connect this AP, if can not, STA need to be associated with on the AP that other can be related again, take this load-balancing mechanism, the STA again probability of related in addition AP is large, the inefficiency that causes the STA network connection, also affected simultaneously STA user's experience, and this mechanism is only carried out the judgement of load balancing according to the load number of AP, and decision making algorithm is abundant not, underuse to a certain extent whole net resource, so that load balancing is not brought into play maximum efficiency.
Summary of the invention
The embodiment of the invention provides a kind of method, Apparatus and system of WLAN load balancing, and is low in order to solve the STA joint efficiency that existing WLAN load-balancing mechanism brings, the problem that affect user's experience and can't take full advantage of whole net resource.
Based on the problems referred to above, one of method of a kind of WLAN load balancing that the embodiment of the invention provides comprises:
Receive the AP of the scanning WLAN message that STA sends, report information, self present load quantity information and the network performance that obtains and the quality information of this STA to AC;
Described AP receives the decision information message to described STA network connection that AC returns; The address that comprises the AP that the STA of AC appointment need to connect in the described decision information message, the AP that described STA need to the connect present load quantity information that to be AC report according to each AP that receives described scanning WLAN message and network performance and quality information decision-making obtain;
The address notification of the AP that described AP need to connect described STA is to described STA, and is related so that STA initiates.
Two of the method for a kind of WLAN load balancing that the embodiment of the invention provides comprises:
AC receives information, self present load quantity information and the network performance that obtains and the quality information of the STA that each AP of the scanning WLAN message received that STA sends reports;
Described AC is according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determines the current AP that needs connection of described STA;
Described AC is carried at the address of the current AP that need to connect of described STA and returns to described each AP in the decision information message.
The embodiment of the invention provides wireless access point apparatus, comprising:
Receiver module is used for receiving the scanning WLAN message that STA sends; And receive the decision information message to described STA network connection that AC returns; The address that comprises the AP that the STA of AC appointment need to connect in the described decision information message, the AP that described STA need to the connect present load quantity information that to be AC report according to each AP that receives described scanning WLAN message and network performance and quality information decision-making obtain;
Sending module is used for after receiving the scanning WLAN message that STA sends, and reports information, self present load quantity information and the network performance that obtains and the quality information of this STA to AC; And the address notification of the AP that described STA need to be connected is related so that STA initiates to described STA.
The controlled in wireless apparatus that the embodiment of the invention provides comprises:
Receiver module be used for to receive information, self present load quantity information and the network performance that obtains and the quality information of the STA that each AP of the scanning WLAN message of having received that STA sends reports;
The load-balancing decision module is used for according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determines the current AP that needs connection of described STA;
Sending module is carried at the decision information message for the address with the current AP that need to connect of described STA and returns to described each AP.
The system of a kind of WLAN load balancing that the embodiment of the invention provides comprises: wireless controller AC and at least one wireless access point AP;
Described at least one AP is used for when receiving the scanning WLAN message that STA sends, and reports information, self present load quantity information and the network performance that obtains and the quality information of this STA to AC; And after receiving the decision information message to described STA network connection that AC returns, the address notification of the AP that the STA that comprises the AC appointment in the decision information message need to be connected is to described STA, and is related so that STA initiates;
Described AC be used for to receive information, self present load quantity information and the network performance that obtains and the quality information of the STA that each AP reports; And according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determine the current AP that needs connection of described STA; The address of the current AP that need to connect of described STA is carried at returns to described each AP in the decision information message.
The beneficial effect of the embodiment of the invention comprises:
The method of the above-mentioned WLAN load balancing that the embodiment of the invention provides, Apparatus and system, adopted the again mode of association of first decision-making, namely receive the AP of the scan request of the WLAN that STA sends, with the load information of self, the network performance that self gets access to and network quality information send to AC, by the loading condition of AC according to each AP, network performance and network quality, and the relevant load balancing of the local therewith three aspects: of setting, determine the current AP that needs connection of STA, then by the AP that receives the WLAN scan request it is announced to STA, related so that STA initiates to it.On the one hand, this mode is not given STA the right to choose of load balancing, but is made a strategic decision by network side, can guarantee like this scheduling of WLAN the whole network Unified Policy; On the other hand, this mode obviously can be avoided the STA network connection inefficiency (or perhaps inefficiency of load balancing) that the mode of decision-making is brought after the first association in the prior art, and the problem that affects user's experience, and, because having taken into full account loading condition, network performance and the network quality of AP, the embodiment of the invention carries out the decision-making of load balancing, the load balancing judgement is more perfect, can so that whole net resource utilized more fully so that load balancing can be brought into play maximum efficiency.
Description of drawings
One of flow chart of the method for the WLAN load balancing that Fig. 1 provides for the embodiment of the invention;
The schematic diagram of the form of the STA Scan Info message element that Fig. 2 provides for the embodiment of the invention;
Two of the flow chart of the method for the WLAN load balancing that Fig. 3 provides for the embodiment of the invention;
The AC that Fig. 4 provides for the embodiment of the invention carries out the flow chart of load-balancing decision;
The structural representation of the wireless access point apparatus that Fig. 5 provides for the embodiment of the invention;
The structural representation of the controlled in wireless apparatus that Fig. 6 provides for the embodiment of the invention;
The structural representation of the system of the WLAN load balancing that Fig. 7 provides for the embodiment of the invention.
Embodiment
Below in conjunction with Figure of description, the method for a kind of WLAN load balancing that the embodiment of the invention is provided, the embodiment of Apparatus and system describe.
The method of a kind of WLAN load balancing that the embodiment of the invention provides for the AP side, as shown in Figure 1, may further comprise the steps:
S101, receive the AP of the scanning WLAN message that STA sends, report information, self present load quantity information and the network performance that obtains and the quality information of this STA to AC;
S102, AP receive the decision information message to the STA network connection that AC returns;
The address that comprises the AP that the STA of AC appointment need to connect in this decision information message, the AP that STA need to the connect present load quantity information that to be AC report according to each AP of the scanning WLAN message of receiving and network performance and quality information decision-making obtain;
The address notification of the AP that S103, AP need to connect STA is to STA, and is related so that STA initiates.
In above-mentioned steps S101, STA comes WLAN is on every side scanned by send scanning WLAN message (for example probe request message) to AP, receive the AP of the probe request message that STA sends, need to report to AC information, self present load quantity information and the network performance that obtains and the quality information of STA;
Specifically, receive the AP of the scanning WLAN message of STA transmission, can be by wireless access point control and supply protocol specification (Control And Provisioning of Wireless Access PointsProtocol Specification, CAPWAP) tunnel reports the information of STA to the mode of AC transmission WTP Event Request control message, self present load quantity information and the network performance that obtains and quality information for example carries AP self load number information in WTP Event Request control message, the MAC Address of STA, the current wireless network side retransmission rate that the current wireless network side transmission rate that AP counts on and described AP count on.
The form of the STA Scan Info message element that carries in the WTP Event Request control message as shown in Figure 2, in Fig. 2, Radio ID is the value of the RADIO that monitors of AP, the intensity of the signal that the RSSI representative is received, RATE represents the wireless network side transmission rate of the current statistics of AP, and Retran rate represents the wireless network side retransmission rate of AP statistics; Basic service element identifier (element ID) (Basic Service Set Identifier, BSSID) corresponding to message that the BSSID representative receives, the MAC Address that STA MAC scans the STA of message for sending this.
Frequently the information of STA is sent on the AC for fear of the AP that receives STA scanning message, on AP, can keep the dynamic listing of a STA who monitors.AP is after AC reports information, self present load quantity information and the network performance that obtains and the quality information of STA, the sign of finishing the STA of STA information reporting is kept in the dynamic listing, and preserving above behind the setting-up time (for example 10s) sign of this STA of deletion from this dynamic listing.
In above-mentioned steps S102, the decision information message that AC returns, preferably, can be the WTP Event Response message corresponding with WTPEvent Request message, in WTP Event Response message, carry the address of the AP that the STA of AC appointment need to connect, in above-mentioned steps S103, AP for example can be by announcing the address of the AP that this STA need to be connected with the probe response message of probe request message pairing.
After above-mentioned steps S103, STA can be after receiving probe response message, and the address of the AP that connects according to the needs that wherein carry is operation associated to its initiation.
If certain AP receives the association request (for example Association Request message) that STA initiates, can will should the association request be transmitted to AC;
If the AC decision-making allows related this AP of this STA (namely receiving that AP of its related request), so, this AP can receive the Association Response message that is successfully associated reason code that carries of AC transmission, and give this STA with this Association Response message repeating, and finish related with this STA;
If AC is owing to other reasons except load number, network performance and quality, decision-making does not allow related this AP of this STA (namely receiving that AP of its related request), so, this AP can receive that AC sends carries the Association Response message of the address of the AP that related suspended market order and AC reassign, and give this STA with Association Response message repeating, and end related with this STA.
AC can transfer to initiate related request to the AP that AC reassigns after receiving the Association Response message of the address that carries the AP that related suspended market order and AC reassign.
The method of a kind of WLAN load balancing that the embodiment of the invention provides for the AC side, as shown in Figure 3, may further comprise the steps:
S301, AC receive information, self present load quantity information and the network performance that obtains and the quality information of the STA that each AP of the scanning WLAN message received that STA sends reports;
S302, AC are according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determine the current AP that needs connection of STA;
S303, AC are carried at the address of the current AP that need to connect of STA and return to each AP in the decision information message.
For abundant configuration network resource, reach the effect of better load balancing, in the embodiment of the invention, when the AC side determines that STA needs related AP, load number, each AP network performance of each AP have been taken into full account, and the factor of network quality, particularly, among the step S302, AC is according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determines the current AP that needs connection of STA, as shown in Figure 4, specifically by following process implementation:
S401, judge the WLAN scanning message receive STA the quantity of AP whether greater than 1, if not, carry out S402, if carry out S403;
S402, with the AP of unique WLAN scanning message that receives STA as the current AP that connects of needing of STA;
S403, self the load number information that reads that each AP reports;
S404, judge whether to exist load number to be lower than among each AP to set load and count the AP of threshold value, if, carry out S405, if not, carry out S406;
S405, read the wireless network side transmission rate that each AP reports, and carry out following S407;
S406, each AP load number is sorted by size, and the AP of load number minimum is defined as the current AP that connects of needing of STA;
S407, judge whether exist wireless network transmissions speed to be higher than the AP that sets transmission rate threshold among each AP, if having, carry out S408, if do not have, carry out S409;
S408, be higher than the AP that sets transmission rate threshold from wireless network transmissions speed and select the minimum AP of wireless network side retransmission rate as the AP of current the needs connection of this STA;
S409, the wireless network transmissions speed that each AP is reported sort by size, will report the AP of the highest wireless network transmissions speed as the current AP that needs connection of described STA.
Preferably, better in order to realize network performance, the AP that network quality is higher can serve for more STA, can also carry out following step S410 and S411 after above-mentioned steps S408, and carries out following step S412 and S413 after above-mentioned steps S409.
S410, judge whether the related quantity of the minimum AP of this wireless network side retransmission rate has reached the most relevance quantity of setting, if, then carry out S411, if not, then withdraw from this flow process.
S411, the most relevance quantity of this AP is increased a fixing numerical value (the large I of fixed numbers is set according to the network environment of reality).
S412, judge whether the related quantity of the highest AP of this wireless network transmissions speed that reports reaches the minimum related quantity of setting, if, carry out S413, if not, then withdraw from this flow process;
S413, the minimum related quantity of this AP is reduced fixing numerical value (the large I of fixed numbers is set according to the network environment of reality).
Further, after above-mentioned S303, the AP that STA can connect according to the needs of AC appointment carries out operation associated, and for the AC side, thereafter extended meeting receives the related request of Association Request that the related AP of STA request sends; AC need to judge the AP that this STA that the AP that sends the related request of Association Request makes a strategic decision out before whether being need to connect, and does not exist except load number, network performance and quality reason to cause this AP can't related this STA;
If judged result is yes, then AC returns to the AP that sends the related request of Association Request and carries the Association Response message that is successfully associated reason code;
If the determination result is NO, then AC returns the Association Response message of the address of the AP that carries related suspended market order and reassign to the AP that sends the related request of Association Request.
Based on same inventive concept, the embodiment of the invention also provides the system of a kind of wireless access point apparatus, controlled in wireless apparatus and WLAN load balancing, because these devices are similar to the method for aforementioned WLAN load balancing with the principle that system deals with problems, therefore the enforcement of this device and system can referring to the enforcement of preceding method, repeat part and repeat no more.
As shown in Figure 5, the wireless access point apparatus that the embodiment of the invention provides comprises:
Sending module 502 is used for after receiving the scanning WLAN message that STA sends, and reports information, self present load quantity information and the network performance that obtains and the quality information of this STA to AC; And the address notification of the AP that STA need to be connected is related so that STA initiates to STA.
Further, above-mentioned sending module 502, concrete being used for sends WTP Event Request control message by CAPWAP tunnel to AC; Carry the current wireless network side retransmission rate that current wireless network side transmission rate that MAC Address, wireless access point apparatus self present load quantity information, the wireless access point apparatus of STA count on and wireless access point apparatus count in this control message.
Preferably, the above-mentioned wireless access point apparatus that the embodiment of the invention provides as shown in Figure 5, can also comprise: preserve module 503, be used for finishing the identification record of STA of STA information reporting at dynamic listing; And after surpassing setting-up time, the sign of this STA of deletion from described dynamic listing.
Further, the above-mentioned access point apparatus that the embodiment of the invention provides as shown in Figure 5, can also comprise: association process module 504;
Correspondingly, above-mentioned sending module 502 also is used for the address notification of AP that STA need to be connected to this STA, if receiver module 501 receives the related request of Association Request that STA initiates, then should the association request be forwarded to AC; And if receiver module 501 receives the Association Response message that is successfully associated reason code that carries that AC sends, then give this STA with Association Response message repeating; Carry the Association Response message of the address of the AP that related suspended market order and AC reassign if receiver module 501 receives that AC sends, then give described STA with Association Response message repeating;
The controlled in wireless apparatus that the embodiment of the invention provides as shown in Figure 6, comprising:
Load-balancing decision module 602 is used for according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determines the current AP that needs connection of STA;
Sending module 603 is carried at the decision information message for the address with the current AP that need to connect of described STA and returns to each AP.
Further, above-mentioned load-balancing decision module 602, the concrete quantity of AP that is used for scanning message as the WLAN that receives STA greater than 1 the time, self the load number information that reads that each AP reports;
Judge that whether existing load number to be lower than the setting load among each AP counts the AP of threshold value;
If exist, read the wireless network side transmission rate that each AP reports, further judge whether exist wireless network transmissions speed to be higher than the AP that sets transmission rate threshold among each AP; If exist, be higher than the AP that selects the minimum AP of wireless network side retransmission rate to connect as the current needs of described STA the AP that sets transmission rate threshold from wireless network transmissions speed, if do not exist, the wireless network transmissions speed that each AP is reported sorts by size, will report the AP of the highest wireless network transmissions speed as the current AP that needs connection of STA;
If do not exist, each AP load number is sorted by size, and the AP of load number minimum is defined as the current AP that needs connection of STA.
Preferably, the controlled in wireless apparatus that the embodiment of the invention provides, as shown in Figure 6, can also comprise: the first related quantity regulating module 604, load-balancing decision module 602 is used for after will report the AP AP that current needs connect as STA of the highest wireless network transmissions speed, the AP that transmission rate threshold, wireless network side retransmission rate quantity the highest and related STA that threshold value, transmission rate be lower than setting does not reach the minimum related quantity of setting is counted in the load that is lower than setting for load number, and the minimum related quantity of this AP is reduced fixing numerical value.
Preferably, the controlled in wireless apparatus that the embodiment of the invention provides, as shown in Figure 6, can also comprise: the second related quantity regulating module 605, be used for load-balancing decision module 602 is higher than the AP that the AP that sets transmission rate threshold selects the minimum AP of wireless network side retransmission rate current needs connection as STA from wireless network transmissions speed after, threshold value is counted in the load that is lower than setting for load number, transmission rate is higher than the transmission rate threshold of setting, wireless network side retransmission rate quantity minimum and related STA does not reach the AP of the most relevance quantity of setting, with the fixing numerical value of most relevance quantity increase of this AP.
Further, above-mentioned receiver module 601 also is used for receiving the related request of Association Request that the related AP of STA request sends;
Above-mentioned load-balancing decision module 602, the AP that the described the STA whether AP that also be used for to judge sends the related request of Association Request makes a strategic decision out before being need to connect, and do not exist reason except load number, network performance and quality to cause this AP can't related this STA;
Above-mentioned sending module 603, also be used for when the judged result of load-balancing decision module 602 when being, return and carry the Association Response message that is successfully associated reason code to sending AP that Association Request association asks; And when load-balancing decision module 602 when the determination result is NO, return the Association Response message of the address of the AP that carries related suspended market order and reassign to the AP that sends the related request of Association Request.
The system of the WLAN load balancing that the embodiment of the invention provides as shown in Figure 7, comprising: controlled in wireless apparatus (AC) 702 and at least one wireless access point apparatus (AP) 701; Wherein:
At least one AP 701 is used for when receiving the scanning WLAN message that STA sends, and reports information, self present load quantity information and the network performance that obtains and the quality information of this STA to AC 702; And after receiving the decision information message to the STA network connection that AC 702 returns, the address notification of the AP that the STA that comprises the AC appointment in the decision information message need to be connected is to described STA, and is related so that STA initiates;
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, the technical scheme of the embodiment of the invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number does not represent the quality of embodiment just to description.
The method of the above-mentioned WLAN load balancing that the embodiment of the invention provides, Apparatus and system, adopted the again mode of association of first decision-making, namely receive the AP of the scan request of the WLAN that STA sends, with the load information of self, the network performance that self gets access to and network quality information send to AC, by the loading condition of AC according to each AP, network performance and network quality, and the relevant load balancing of the local therewith three aspects: of setting, determine the current AP that needs connection of STA, then by the AP that receives the WLAN scan request it is announced to STA, related so that STA initiates to it.On the one hand, this mode is not given STA the right to choose of load balancing, but is made a strategic decision by network side, can guarantee like this scheduling of WLAN the whole network Unified Policy; On the other hand, this mode obviously can be avoided the STA network connection inefficiency (or perhaps inefficiency of load balancing) that the mode of decision-making is brought after the first association in the prior art, and the problem that affects user's experience, and, because having taken into full account loading condition, network performance and the network quality of AP, the embodiment of the invention carries out the decision-making of load balancing, the load balancing judgement is more perfect, can so that whole net resource utilized more fully so that load balancing can be brought into play maximum efficiency.
Further, in the embodiment of the invention, be lower than load for load number and count threshold value, transmission rate is higher than the transmission rate threshold of setting, wireless network side retransmission rate quantity minimum and related STA does not reach the AP of the most relevance quantity of setting, reduce its minimum related quantity, threshold value is counted in the load that is lower than setting for load number, transmission rate is higher than the transmission rate threshold of setting, wireless network side retransmission rate quantity minimum and related STA does not reach the AP of the most relevance quantity of setting, increase the most relevance quantity of this AP, like this, can so that current network performance and network quality AP and network performance and the relatively poor AP of network quality distinguish preferably, when realizing load balancing, so that the resource of whole network can be fully utilized.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (19)
1. the method for a WLAN (wireless local area network) WLAN load balancing is characterized in that, comprising:
Receive the wireless access point AP of the scanning WLAN message that terminal STA sends, report information, self present load quantity information and the network performance that obtains and the quality information of this STA to wireless controller AC;
Described AP receives the decision information message to described STA network connection that AC returns; The address that comprises the AP that the STA of AC appointment need to connect in the described decision information message, the AP that described STA need to the connect present load quantity information that to be AC report according to each AP that receives described scanning WLAN message and network performance and quality information decision-making obtain;
The address notification of the AP that described AP need to connect described STA is to described STA, and is related so that STA initiates.
2. the method for claim 1 is characterized in that, AP comprises to information, self present load quantity information and the network performance that obtains and quality information that AC reports STA:
Described AP sends WTP Event Request control message by wireless access point control and supply protocol specification CAPWAP tunnel to AC; Carry the current wireless network side retransmission rate that current wireless network side transmission rate that the media access control MAC address of STA, described AP self present load quantity information, described AP count on and described AP count in the described control message.
3. method as claimed in claim 2 is characterized in that, AP also comprises after AC reports information, self present load quantity information and the network performance that obtains and the quality information of STA:
The sign that described AP will finish the STA of STA information reporting is kept in the dynamic listing;
Preserving above behind the setting-up time sign of this STA of deletion from described dynamic listing.
4. such as each described method of claim 1-3, it is characterized in that, the address notification of the AP that AP need to connect described STA also comprises to the described STA:
If described AP receives the related request of Association Request that STA initiates, should the association request be forwarded to AC;
If receive the Association Response message that is successfully associated reason code that carries of AC transmission, then give described STA with described Association Response message repeating, and finish related with described STA;
If the Association Response message of the address that carries the AP that related suspended market order and AC reassign that receives that AC sends then give described STA with described Association Response message repeating, and termination is related with described STA.
5. the method for a WLAN (wireless local area network) WLAN load balancing is characterized in that, comprising:
Wireless controller AC receives information, self present load quantity information and the network performance that obtains and the quality information of the STA that each wireless access point AP of the scanning WLAN message received that terminal STA sends reports;
Described AC is according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determines the current AP that needs connection of described STA;
Described AC is carried at the address of the current AP that need to connect of described STA and returns to described each AP in the decision information message.
6. method as claimed in claim 5 is characterized in that, according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determine the current AP that needs connection of described STA, comprising:
When the quantity of the AP of the WLAN scanning message that receives described STA greater than 1 the time, self the load number information that reads that each AP reports;
Judge that whether existing load number to be lower than the setting load among each AP counts the AP of threshold value;
If exist, read the wireless network side transmission rate that each AP reports, further judge whether exist wireless network transmissions speed to be higher than the AP that sets transmission rate threshold among each AP; If exist, be higher than the AP that selects the minimum AP of wireless network side retransmission rate to connect as the current needs of described STA the AP that sets transmission rate threshold from wireless network transmissions speed, if do not exist, the wireless network transmissions speed that each AP is reported sorts by size, will report the AP of the highest wireless network transmissions speed as the current AP that needs connection of described STA;
If do not exist, each AP load number is sorted by size, and the AP of load number minimum is defined as the current AP that needs connection of described STA.
7. method as claimed in claim 6 is characterized in that, after the current AP that needs to connect, also comprises as described STA at the AP that will report the highest wireless network transmissions speed:
The AP that transmission rate threshold, wireless network side retransmission rate quantity the highest and related STA that threshold value, transmission rate be lower than setting does not reach the minimum related quantity of setting is counted in the load that is lower than setting for load number, and described AC reduces fixing numerical value with the minimum related quantity of this AP.
8. method as claimed in claim 6 is characterized in that, after wireless network transmissions speed is higher than the AP of AP as the current needs connection of described STA that selection wireless network side retransmission rate is minimum the AP that sets transmission rate threshold, also comprises:
The AP that transmission rate threshold, wireless network side retransmission rate quantity minimum and related STA that threshold value, transmission rate be higher than setting does not reach the most relevance quantity of setting is counted in the load that is lower than setting for load number, and described AC increases fixing numerical value with the most relevance quantity of this AP.
9. such as each described method of claim 5-8, it is characterized in that, described AC is carried at the address of the current AP that need to connect of described STA and returns in the decision information message after described each AP, also comprises:
AC receives the related request of Association Request that the related AP of STA request sends;
Described AC judges the AP that described STA that the AP that sends the related request of Association Request makes a strategic decision out before whether being need to connect, and does not exist reason except load number, network performance and quality to cause this AP can't related this STA;
If then return to the AP that sends the related request of Association Request and carry the Association Response message that is successfully associated reason code;
If not, then return the Association Response message of the address of the AP that carries related suspended market order and reassign to the AP that sends the related request of Association Request.
10. a wireless access point apparatus is characterized in that, comprising:
Receiver module is used for the scanning WLAN message that receiving terminal STA sends; And receive the decision information message to described STA network connection that AC returns; The address that comprises the wireless access point AP that the STA of wireless controller AC appointment need to connect in the described decision information message, the AP that described STA need to the connect present load quantity information that to be AC report according to each AP that receives described scanning WLAN message and network performance and quality information decision-making obtain;
Sending module is used for after receiving the scanning WLAN message that STA sends, and reports information, self present load quantity information and the network performance that obtains and the quality information of this STA to AC; And the address notification of the AP that described STA need to be connected is related so that STA initiates to described STA.
11. device as claimed in claim 10 is characterized in that, described sending module, and concrete being used for sends WTP Event Request control message by wireless access point control and supply protocol specification CAPWAP tunnel to AC; Carry the current wireless network side retransmission rate that current wireless network side transmission rate that the MAC Address of STA, described wireless access point apparatus self present load quantity information, described wireless access point apparatus count on and described wireless access point apparatus count in the described control message.
12. device as claimed in claim 11 is characterized in that, also comprises:
Preserve module, be used for to finish the identification record of STA of STA information reporting at dynamic listing; And after surpassing setting-up time, the sign of this STA of deletion from described dynamic listing.
13. such as each described device of claim 10-12, it is characterized in that, also comprise: the association process module;
Described sending module, the address notification that also is used for AP that described STA need to be connected if described receiver module receives the related request of Association Request that STA initiates, then should the association request be forwarded to AC to the described STA; And if described receiver module receives the Association Response message that is successfully associated reason code that carries that AC sends, then give described STA with described Association Response message repeating; Carry the Association Response message of the address of the AP that related suspended market order and AC reassign if described receiver module receives that AC sends, then give described STA with described Association Response message repeating;
Described association process module is used at described sending module finishing related with STA after described STA transmission carries the Association Response message that is successfully associated reason code; And send to described STA at described sending module after the Association Response message of the address that carries the AP that related suspended market order and AC reassign, end related with described STA.
14. a controlled in wireless apparatus is characterized in that, comprising:
Receiver module be used for to receive information, self present load quantity information and the network performance that obtains and the quality information of the STA that each wireless access point AP of the scanning WLAN message of having received that terminal STA sends reports;
The load-balancing decision module is used for according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determines the current AP that needs connection of described STA;
Sending module is carried at the decision information message for the address with the current AP that need to connect of described STA and returns to described each AP.
15. device as claimed in claim 14 is characterized in that, described load-balancing decision module, the concrete quantity of AP that is used for scanning message as the WLAN that receives described STA greater than 1 the time, self the load number information that reads that each AP reports;
Judge that whether existing load number to be lower than the setting load among each AP counts the AP of threshold value;
If exist, read the wireless network side transmission rate that each AP reports, further judge whether exist wireless network transmissions speed to be higher than the AP that sets transmission rate threshold among each AP; If exist, be higher than the AP that selects the minimum AP of wireless network side retransmission rate to connect as the current needs of described STA the AP that sets transmission rate threshold from wireless network transmissions speed, if do not exist, the wireless network transmissions speed that each AP is reported sorts by size, will report the AP of the highest wireless network transmissions speed as the current AP that needs connection of described STA;
If do not exist, each AP load number is sorted by size, and the AP of load number minimum is defined as the current AP that needs connection of described STA.
16. device as claimed in claim 15, it is characterized in that, also comprise: the first related quantity regulating module, described load-balancing decision module is used for after will report the AP AP that current needs connect as described STA of the highest wireless network transmissions speed, the AP that transmission rate threshold, wireless network side retransmission rate quantity the highest and related STA that threshold value, transmission rate be lower than setting does not reach the minimum related quantity of setting is counted in the load that is lower than setting for load number, and the minimum related quantity of this AP is reduced fixing numerical value.
17. device as claimed in claim 15, it is characterized in that, also comprise: the second related quantity regulating module, be used for described load-balancing decision module is higher than the AP that the AP that sets transmission rate threshold selects the minimum AP of wireless network side retransmission rate current needs connection as described STA from wireless network transmissions speed after, threshold value is counted in the load that is lower than setting for load number, transmission rate is higher than the transmission rate threshold of setting, wireless network side retransmission rate quantity minimum and related STA does not reach the AP of the most relevance quantity of setting, with the fixing numerical value of most relevance quantity increase of this AP.
18., it is characterized in that described receiver module also is used for receiving the related request of Association Request that the related AP of STA request sends such as each described device of claim 14-17;
Described load-balancing decision module, the AP that the described the STA whether AP that also be used for to judge sends the related request of Association Request makes a strategic decision out before being need to connect, and do not exist reason except load number, network performance and quality to cause this AP can't related this STA;
Described sending module, also be used for when the judged result of described load-balancing decision module when being, return and carry the Association Response message that is successfully associated reason code to sending AP that Association Request association asks; And when described load-balancing decision module when the determination result is NO, return the Association Response message of the address of the AP that carries related suspended market order and reassign to the AP that sends the related request of Association Request.
19. the system of a WLAN load balancing is characterized in that, comprising: wireless controller AC and at least one wireless access point AP;
Described at least one AP is used for when receiving the scanning WLAN message that STA sends, and reports information, self present load quantity information and the network performance that obtains and the quality information of this STA to AC; And after receiving the decision information message to described STA network connection that AC returns, the address notification of the AP that the STA that comprises the AC appointment in the decision information message need to be connected is to described STA, and is related so that STA initiates;
Described AC be used for to receive information, self present load quantity information and the network performance that obtains and the quality information of the STA that each AP reports; And according to each AP self present load quantity information and the network performance that obtains and quality information, and predefined load balancing, determine the current AP that needs connection of described STA; The address of the current AP that need to connect of described STA is carried at returns to described each AP in the decision information message.
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