CN102333335A - Service recovery method, equipment and system for wireless local area network (WLAN) - Google Patents
Service recovery method, equipment and system for wireless local area network (WLAN) Download PDFInfo
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Abstract
The embodiment of the invention discloses a service recovery method, service recovery equipment and a service recovery system for a wireless local area network (WLAN). The method comprises the following steps of: receiving a service recovery request message from an access point (AP) by using an access controller (AC), wherein the service recovery request message comprises a physical address of the AP; querying a recovery information table according to the physical address of the AP, wherein the recovery information table comprises the physical address of the AP; and if the recovery information table comprises a recorded physical address, the same as the physical address of the AP, of the AP, acquiring the service recovery information of the AP according to the physical address of the AP, and transmitting a service recovery response message to the AP to make the AP recover an information recovery service according to the service recovery information, wherein the service recovery response message comprises the service recovery information. By the technical scheme provided by the embodiment of the invention, the problems of long login time, low service recovery speed and high AC management and maintenance cost of the AP in the prior art can be solved.
Description
Technical field
The present invention relates to network communication field, relate in particular to method, equipment and the system of business recovery among a kind of WLAN WLAN.
Background technology
WLAN (Wireless Local Area Network is called for short WLAN) is with the LAN of wireless channel as transmission medium.Generally include website (STAtion is called for short STA), access point (Access Point is called for short AP), access controller equipment such as (Access Controller are called for short AC) in the network configuration based on the WLAN technology.Wherein, the effect of AP is that STA and cable network are coupled together, and AC realizes the management to AP through wireless access point control and configuration (Control And Provisioning of Wireless Access Point is called for short CAPWAP) agreement.
Usually, AP need be according to the CAPWAP agreement, follows state machine and AC and carries out repeatedly could reaching the standard grade from an AC after mutual.The last line process of AP comprises:
1) AP obtains Internet protocol (Internet Protocol the is called for short IP) address of self and AC.AP has multiple mode can obtain the IP address of AC; For example; Name server (Domain Name Server is called for short DNS) parsing, DHCP (Dynamic Host Configuration Protocol is called for short DHCP) option, static ip address, broadcasting etc.
2) AP finds AC.After AP got access to the IP address of AC, AP sent and finds request message, and the CAPWAP state machine of AP gets into (Discovery) state of discovery.Receive the discovery response message of AC response as AP after, then begin to prepare to add this AC.
3) the AP request adds AC.Usually before AP adds AC; Need carry out datagram transmission layer security protocol (Datagram Transport Layer Security; Be called for short DTLS) checking; After the DTLS between AP and the AC shook hands success, the CAPWAP state machine of AP got into and adds (Join) state, and AP sends the message that joins request to AC.When AP receives the adding response message that AC responds, and object code (Result Code) be successfully (Success), and then this AC of AP adding successfully.
4) AP auto-update.After AP successfully added AC, whether the software version of more current operation earlier required the software version of operation consistent with AC; If consistent, then skip this step; If inconsistent, AP sends the edition data request message to AC, and the CAPWAP state machine of AP gets into edition upgrading (Image Data) state, and auto-update is carried out in request.After AC received the edition data request message, the CAPWAP state machine of AC got into edition upgrading (Image Data) state, and responded the edition data response message.AC sends to AP with new software through several edition data response messages.
5) AP configuration distributing.AP successfully adds AC, and the version of the current operation of AP and AC be when requiring the version of operation consistent, and AP sends configuration request message, and the CAPWAP state machine of AP gets into (Config) state of configuration.After AC received configuration request message, the CAPWAP state machine of AC got into configuration (Config) state, and responded configuration response message, and notice AP is configured on request.AP receives configuration response message, accomplishes configuration.
6) AP configure-ack.After AP received configuration response message, the CAPWAP state machine of AP got into data checks (Data Check) state, and sent transition stage event request (Change State Event Request) message report configuration implementation status.After AC receives Change State Event Request message; If current CAPWAP state machine is configuration (Config) state; Then state transfers data checks (Data Check) state to, and responds transition stage event response (Change State Event Response) message.After AP received Change State Event Response message, if current CAPWAP state machine is data checks (Data Check) state, then state transferred operation (Run) state to, and created the CAPWAP data channel, the beginning data forwarding.
7) transmit data through the CAPWAP data channel.AP regularly sends data channel keep-alive (Keepalive) message after getting into operation (Run) state, and whether inspection CAPWAP data channel operate as normal.AC receives the 1st keep-alive (Keepalive) message, if current be data checks (Data Check) state, then state transfers operation (Run) state to, and responds keep-alive (Keepalive) message.AP and AC transmit user data through the CAPWAP data channel.
The last line process of above-mentioned AP needs time of a few minutes usually.When abnormal failure appears in AP, when resuming work again after the for example of short duration power down, according to said process; The AP on-line time is long, and it is slow that customer service is recovered, if an AC manages a large amount of AP; For example hundreds and thousands of AP the time, the cost that AC administers and maintains AP is also very big.
Summary of the invention
The embodiment of the invention provides method, equipment and the system of business recovery among a kind of WLAN WLAN, and long with AP on-line time in the solution prior art, business recovery is slow, and AC administers and maintains the big problem of AP cost.
According to an aspect of the present invention, the invention provides the method for business recovery among a kind of WLAN WLAN, comprising:
Access controller AC receives the business recovery request message from access point AP, comprises the physical address of said AP in the said business recovery request message;
Physical address inquiry recovering information table according to said AP comprises the AP physical address in the said recovering information table;
If exist the AP physical address of an existing record identical in the said recovering information table with the physical address of said AP; Then according to the physical address of said AP; Obtain the business recovery information of said AP; And, comprise said business recovery information in the said business recovery response message, so that said AP recovers professional according to said business recovery information to said AP transmission business recovery response message.
According to a second aspect of the invention, the invention provides the method for business recovery among a kind of WLAN WLAN, comprising:
Access point AP sends the business recovery request message to access controller AC, comprises the physical address of said AP in the said business recovery request message;
Reception comprises IP address and the port numbers of said AC from the business recovery response message of said AC in the said business recovery response message, and the business recovery information of said AP;
According to IP address and the port numbers of said AC, the session of recovery and said AC, and to said AC transmission keep-alive message, so that said AC upgrades local state machine;
Recover professional according to said business recovery information.
According to a third aspect of the invention we, the invention provides a kind of access controller AC, comprise receiver, query unit, acquiring unit and transmitter, wherein:
Said receiver is used to receive the business recovery request message from access point AP, comprises the physical address of said AP in the said business recovery request message;
Said query unit is used for the physical address inquiry recovering information table according to said AP, comprises the AP physical address in the said recovering information table;
Said acquiring unit when the AP physical address that is used for having an existing record when said recovering information table is identical with the physical address of said AP, according to the physical address of said AP, obtains the business recovery information of said AP;
Said transmitter is used for sending the business recovery response message to said AP, comprises the said business recovery information that said acquiring unit obtains in the said business recovery response message.
According to a forth aspect of the invention, the invention provides a kind of access point AP, comprise transmitter, receiver, first recovery unit and second recovery unit, wherein:
Said transmitter is used for sending the business recovery request message to access controller AC, comprises the physical address of said AP in the said business recovery request message.
Said receiver is used to receive the business recovery response message from said AC, comprises IP address and the port numbers of said AC in the said business recovery response message, and the business recovery information of said AP;
Said first recovery unit according to IP address and the port numbers of said AC, recovers the session with said AC;
Said second recovery unit is used for recovering professional according to said business recovery information;
Said transmitter also is used for sending keep-alive message to said AC, so that said AC upgrades the state of the local said AP that preserves.
According to a fifth aspect of the invention, the invention provides the system of business recovery among a kind of WLAN WLAN, comprise access point AP and access controller AC.
Technical scheme provided by the invention is sent failure cause through AP to AC, makes AC preserve AP session information and business recovery information; After AP resumed work, AP obtained business recovery information from AC, and the CAPWAP passage of foundation and AC, can shorten on-line time and the business recovery time of AP, reduced the cost that AC administers and maintains AP.
Description of drawings
Fig. 1 is the method flow diagram of business recovery among a kind of WLAN WLAN of providing of the embodiment of the invention;
Fig. 2 is the method flow diagram of business recovery among the another kind of WLAN WLAN that provides of the embodiment of the invention;
Fig. 3, Fig. 4 are the equipment block diagrams of a kind of access controller AC of providing of the embodiment of the invention;
Fig. 5, Fig. 6 are the equipment block diagrams of a kind of access point AP of providing of the embodiment of the invention;
Fig. 7 is the system block diagram of business recovery among a kind of WLAN WLAN of providing of the embodiment of the invention.
Embodiment
Referring to Fig. 1, be the method flow diagram of business recovery among a kind of WLAN WLAN of providing of the embodiment of the invention, said method comprises:
101: access controller AC receives the business recovery request message from access point AP, comprises the physical address of said AP in the said business recovery request message.
Said business recovery request message can be to find request message, comprises IP address and media interviews control (Media Access Control the is called for short MAC) address of said AP in the said discovery request message.
Said AC received the failure notice message from said AP before receiving said business recovery request message, comprise physical address and the failure cause of said AP in the said failure notice message.
If said failure cause is said AP abnormal failure; For example AP power down; Said AC writes down the physical address of said AP in the recovering information table, can also in said recovering information table, write down the session information between said AC and the said AP, the business recovery information of said AP; Correspondingly, comprise the AP physical address in the said recovering information table, the corresponding relation of session information and business recovery information.Optional, said AC can also write down the access point identity APID of said AP; Correspondingly, comprise the AP physical address in the said recovering information table, AP ID, the corresponding relation of session information and business recovery information.
Optional, said AC can be provided with the ageing time threshold value, and for example 5 minutes, if when arriving said ageing time threshold value, still do not receive business recovery request message from said AP, then delete the relevant information of said AP.Concrete, said AC deletes the corresponding record of physical address of AP described in the said recovering information table.
Perhaps; If said failure cause is said AP abnormal failure; Said AC writes down the physical address of said AP in the recovering information table, can also in said recovering information table, write down the AP ID of said AP, and keeps local corresponding session information and the business recovery information of said AP ID.Correspondingly, the corresponding relation that comprises AP physical address and AP ID in the said recovering information table.
Optional, said AC can be provided with the ageing time threshold value, if when arriving said ageing time threshold value, does not still receive said business recovery request message, then deletes the relevant information of said AP.Concrete, according to the physical address of said AP, obtain the AP ID of said AP, delete local corresponding session information and the business recovery information of said AP ID of preserving, and delete the corresponding record of physical address of AP described in the said recovering information table.
Said session information comprises the IP address of AP, the port numbers of AP, the IP address of AC and the port numbers of AC.
102: the physical address inquiry recovering information table according to said AP comprises the AP physical address in the said recovering information table.
Said recovering information table can comprise the AP physical address, the corresponding relation of session information and business recovery information; The corresponding relation that perhaps comprises AP physical address and AP ID.
103: if exist the AP physical address of an existing record identical in the said recovering information table with the physical address of said AP; Then according to the physical address of said AP; Obtain the business recovery information of said AP; And, comprise said business recovery information in the said business recovery response message, so that said AP recovers professional according to said business recovery information to said AP transmission business recovery response message.
Said business recovery response message can be to find response message, also can be configuration response message.
Said AC can carry said business recovery information with the mode of type lengths values (Type-Length-Value is called for short TLV) in the load (payload) of said business recovery response message.
Said business recovery information comprises AP configuration information and user service information.
Said AP configuration information comprises RF configuration information and virtual access point (Virtual Access Point is called for short VAP) configuration information; The name that can also comprise AP in the said AP configuration information, the central processing unit of AP (Central Processing Unit is called for short CPU) occupation rate threshold value etc.
Said user service information comprises IP address, user's physical address and subscriber association information; Said user service information can also comprise user authentication information; For example; WLAN authentication and privacy infrastructure (Wireless LAN Authentication and Privacy Infrastructure is called for short WAPI) information, Wireless Fidelity (Wireless Fidelity; Be called for short Wi-Fi) protection visit (Wi-Fi Protected Access is called for short WPA) information etc.
Concrete, said AC can carry RF configuration information, the VAP configuration information of said AP, the optional name that can also carry said AP, CPU threshold value etc. successively in the load (payload) of said business recovery response message; Then, carry each user's IP address, user's MAC address, subscriber association information and optional user authentication information more successively.
The technical scheme that adopts the embodiment of the invention to provide, AC preserves CAPWAP session information and the business recovery information of this AP according to the failure cause that AP provides; After AP resumed work, AC offered AP with said business recovery information, set up the CAPWAP passage with this AP, thereby it is long to have solved in the prior art AP on-line time, and business recovery is slow, and AC administers and maintains the big problem of AP cost.
As shown in Figure 2, be the method flow diagram of business recovery among the another kind of WLAN WLAN that provides of the embodiment of the invention, said method comprises:
201: access point AP sends to access controller AC business recovery request message, comprises the physical address of said AP in the said business recovery request message.
At said AP before AC sends the business recovery request message; When abnormal failure takes place; For example during power down, the energy that said AP can utilize electric capacity to preserve generates failure notice message; And send said failure notice message to said AC, comprise physical address and the failure cause of said AP in the said failure notice message.
Said business recovery request message can be to find request message, and after said AP recovered from fault, said AP sent and finds request message, comprises IP address and the MAC Address of said AP in the said discovery request message.
202: said AP receives the business recovery response message from said AC, comprises IP address and the port numbers of said AC in the said business recovery response message, and the business recovery information of said AP.
Said business recovery response message can be to find response message, also can be configuration response message.
The head of said business recovery response message comprises IP address and the port numbers of said AC, comprises the business recovery information of said AP in the load of said business recovery response message (payload).
Said business recovery information can be carried in the load (payload) of said business recovery response message with the mode of TLV.
203: said AP is according to IP address and the port numbers of said AC, recovers the session with said AC, and sends keep-alive message to said AC, so that said AC upgrades local state machine.
Said AP recovers the CAPWAP session with said AC according to IP address and the port numbers of said AC; And, make said AC upgrade local state machine and be operation (Run) state to said AC transmission data channel keep-alive (Keepalive) message.
204: said AP is according to said business recovery information.
Said AP can recover the configuration information of said AP earlier according to said business recovery information, recovers professional relevant configuration again, recovers customer service at last.
Said business recovery information comprises AP configuration information and user service information.
Said AP configuration information comprises RF configuration information and VAP configuration information; The name that can also comprise AP in the said AP configuration information, the central processor CPU occupation rate threshold value of AP etc.
Said user service information comprises IP address, user's physical address and subscriber association information; Said user service information can also comprise user authentication information, for example, and WAPI information, WPA information etc.
Specifically, said AP can recover the RF configuration of said AP at first according to said RF configuration information; Then, according to said VAP configuration information, recover the business configuration of said AP; At last,, recover user's business, i.e. user's through said AP access business again according to said user service information.
The technical scheme that adopts the embodiment of the invention to provide, AP provides failure cause to AC when abnormal failure takes place, make AC preserve session information and the business recovery information of this AP; After this AP resumed work, this AP obtained said business recovery information from AC, and the CAPWAP passage of foundation and AC, and it is long to solve in the prior art AP on-line time, and business recovery is slow, and AC administers and maintains the big problem of AP cost.
Referring to Fig. 3, be the equipment block diagram of a kind of access controller AC of providing of the embodiment of the invention, be used to the method that realizes that the present invention is shown in Figure 1.Said AC comprises receiver 301, query unit 302, and acquiring unit 303 and transmitter 304, wherein:
Said receiver 301 is used to receive the business recovery request message from AP, comprises the physical address of access point AP in the said business recovery request message;
Said query unit 302 is used for the physical address inquiry recovering information table according to said AP, comprises the AP physical address in the said recovering information table;
Said acquiring unit 303 when the AP physical address that is used for having an existing record when said recovering information table is identical with the physical address of said AP, according to the physical address of said AP, obtains the business recovery information of said AP;
Said transmitter 304 is used for sending the business recovery response message to said AP, comprises the said business recovery information that said acquiring unit 303 obtains in the said business recovery response message.
Said business recovery request message can be to find request message, comprises IP address and the MAC Address of said AP in the said discovery request message.
Said receiver 301 also is used to receive the failure notice message from said AP, comprises physical address and the failure cause of said AP in the said failure notice message.
As shown in Figure 4, said AC can also comprise:
Record cell 305 is used for when said failure cause is said AP abnormal failure, the physical address of the said AP of record in said recovering information table.
Optional, said AC can also comprise:
Aging unit is used to be provided with the ageing time threshold value, and when arriving said ageing time threshold value, and said receiver 301 is deleted the relevant information of said AP when still not receiving the business recovery request message from said AP.
Said record cell 305 also is used for the business recovery information at the said recovering information table said AC of record and the session information of said AP, said AP; Perhaps, the access point identity AP ID of the said AP of record in said recovering information table, and identify local corresponding session information and the business recovery information of said AP ID of preserving of said AC.
Said session information comprises the IP address of AP, the port numbers of AP, the IP address of AC and the port numbers of AC.
Said business recovery information comprises AP configuration information and user service information.
Said AP configuration information comprises RF configuration information and VAP configuration information; The name that can also comprise AP in the said AP configuration information, the CPU occupation rate threshold value of AP etc.
Said user service information comprises IP address, user's physical address and subscriber association information; Said user service information can also comprise user authentication information, for example, and WAPI information, WPA information etc.
Optional, said AC also comprises:
Generation unit is used for generating said business recovery response message according to the said business recovery information that said acquiring unit 303 obtains.
Said business recovery response message can be to find response message, also can be configuration response message.
The head of said business recovery response message comprises the IP address of said AP, the port numbers of said AP, the IP address of said AC and the port numbers of said AC
Said generation unit specifically is used at the load of said business recovery response message (payload), carries RF configuration information, the VAP configuration information of said AP, the optional name that can also carry said AP, CPU threshold value etc. successively with TLV; And then carry each user's IP address, user's MAC address, subscriber association information and optional user authentication information successively.
Said transmitter 304 specifically is used for sending the said business recovery response message that said generation unit generates to said AP; So that said AP recovers professional according to said business recovery information.
Referring to Fig. 5, be the equipment block diagram of a kind of access point AP of providing of the embodiment of the invention, be used to the method that realizes that the present invention is shown in Figure 2.Said AP comprises transmitter 501, receiver 502, the first recovery units 503 and second recovery unit 504.Wherein:
Said transmitter 501 is used for sending the business recovery request message to AC, comprises the physical address of said AP in the said business recovery request message.
Said receiver 502 is used to receive the business recovery response message from AC, comprises IP address and the port numbers of said AC in the said business recovery response message, and the business recovery information of said AP;
Said first recovery unit 503 according to IP address and the port numbers of said AC, recovers the session with said AC;
Said second recovery unit 504 is used for recovering professional according to said business recovery information;
Said transmitter 501 also is used for sending keep-alive message to said AC, so that said AC upgrades the state of the local said AP that preserves.
Said first recovery unit 503 specifically is used for IP address and port numbers according to said AC, recovers the CAPWAP session with said AC.
Said transmitter 501 specifically is used for sending data channel keep-alive (Keepalive) message to said AC, is operation (Run) state so that said AC upgrades local state machine.
As shown in Figure 6, said AP can also comprise:
Generation unit 505, said generation unit is used to generate failure notice message, comprises physical address and the failure cause of said AP in the said failure notice message.
Said transmitter 501 also is used for sending said failure notice message to said AC.
Said business recovery information comprises AP configuration information and user service information.
Said AP configuration information comprises RF configuration information and VAP configuration information; The name that can also comprise AP in the said AP configuration information, the CPU occupation rate threshold value of AP etc.
Said user service information comprises IP address, user's physical address and subscriber association information; Said user service information can also comprise user authentication information, for example, and WAPI information, WPA information etc.
Correspondingly, said second recovery unit 504 specifically is used for,
According to said RF configuration information, recover the RF configuration of said AP earlier;
According to said VAP configuration information, recover the business configuration of said AP again;
According to said user service information, recover business at last through the user of said AP access.
Referring to Fig. 7, be the system block diagram of business recovery among a kind of WLAN WLAN of providing of the embodiment of the invention, said system comprises access controller AC 701 and access point AP 702.Wherein:
Said AC 701; Be used to receive business recovery request message from said AP 702; The physical address that comprises said AP 702 in the said business recovery request message, the physical address inquiry recovering information table according to said AP702 comprises the AP physical address in the said recovering information table; If exist the AP physical address of an existing record identical in the said recovering information table with the physical address of said AP 702; Then, obtain the business recovery information of said AP 702, send the business recovery response message to said AP 702 according to the physical address of said AP 702; The IP address and the port numbers that comprise said AC 701 in the said business recovery response message, and the business recovery information of said AP 702;
Said AP 702; Be used for sending to said AC 701 said business recovery request messages; Receive the business recovery response message that said AC 701 sends, and, recover session with said AC 701 according to IP address and the port numbers of said AC 701; Recover professional according to said business recovery information, and send keep-alive message to said AC 701.
Said AP 702 also is used for before sending said business recovery request message, generating failure notice message, and sends said failure notice message to said AC 701, comprises physical address and the failure cause of said AP 702 in the said failure notice message.
Said AC 701; Also be used to receive said failure notice message; When said failure cause is said AP 702 abnormal failures, the physical address of the said AP 702 of record, said AC 701 and the session information of said AP 702, the business recovery information of said AP 702 in said recovering information table; Perhaps, the physical address of the said AP 702 of record, the access point identity AP ID of said AP 702 in said recovering information table, and identify said AC 701 local corresponding session information and the business recovery information of said APID of preserving.
Optional, said AC 701 also is used to be provided with the ageing time threshold value, when arriving said ageing time threshold value, and when still not receiving the business recovery request message that said AP 702 sends, deletes the relevant information of said AP 702.
Said business recovery information comprises AP configuration information and user service information.
Optional, said AC701 also is used for generating said business recovery response message according to said business recovery information.Specifically be used for, in the load (payload) of said business recovery response message, carry the configuration information of said AP successively and the user's that inserts through said AP business information with the mode of TLV.
Said AP 702 specifically is used for IP address and port numbers according to said AC 701, recovers the CAPWAP session with said AC 701; Send data channel keep-alive (Keepalive) message to said AC 701, be operation (Run) state so that said AC 701 upgrades local state machine.
Said AP configuration information comprises RF configuration information and VAP configuration information; The name that can also comprise AP in the said AP configuration information, the CPU occupation rate threshold value of AP etc.
Said user service information comprises IP address, user's physical address and subscriber association information; Said user service information can also comprise user authentication information, for example, and WAPI information, WPA information etc.
Said AP 702 specifically is used for elder generation according to said RF configuration information, recovers the RF configuration of said AP702; According to said VAP configuration information, recover the business configuration of said AP 702 again; According to said user service information, recover business at last through the user of said AP 702 accesses.
The technical scheme that adopts the embodiment of the invention to provide, AC preserves CAPWAP session information and the business recovery information of this AP according to the failure cause that AP provides; After AP resumed work, AP obtained said business recovery information from AC, and the CAPWAP passage of foundation and AC, and it is long to solve in the prior art AP on-line time, and business recovery is slow, and AC administers and maintains the big problem of AP cost.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer-readable recording medium; Said storage medium can be ROM/RAM, disk or CD etc.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (17)
1. the method for business recovery among the WLAN WLAN is characterized in that, comprising:
Access controller AC receives the business recovery request message from access point AP, comprises the physical address of said AP in the said business recovery request message;
Physical address inquiry recovering information table according to said AP comprises the AP physical address in the said recovering information table;
If exist the AP physical address of an existing record identical in the said recovering information table with the physical address of said AP; Then according to the physical address of said AP; Obtain the business recovery information of said AP; And, comprise said business recovery information in the said business recovery response message, so that said AP recovers professional according to said business recovery information to said AP transmission business recovery response message.
2. method according to claim 1 is characterized in that, before receiving the business recovery request message, said method also comprises:
Reception comprises physical address and the failure cause of said AP from the failure notice message of said AP in the said failure notice message;
If said failure cause is said AP abnormal failure, then in said recovering information table, write down the physical address of said AP.
3. method according to claim 2 is characterized in that, said recovering information table also comprises session information and business recovery information; Correspondingly, if said failure cause is said AP abnormal failure, said method also comprises:
Session information in said recovering information table between said AC of record and the said AP, the business recovery information of said AP.
4. method according to claim 2 is characterized in that, said recovering information table also comprises access point identity AP ID; Correspondingly, if said failure cause is said AP abnormal failure, said method also comprises:
The AP ID of the said AP of record in said recovering information table, and keep local corresponding session information and the business recovery information of said AP ID of preserving.
5. according to each described method of claim 1 to 4; It is characterized in that; Said business recovery information comprises AP configuration information and user service information; Said AP configuration information comprises RF configuration information and virtual access point VAP configuration information, and said user service information comprises IP address, user's physical address and subscriber association information.
6. the method for business recovery among the WLAN WLAN is characterized in that, comprising:
Access point AP sends the business recovery request message to access controller AC, comprises the physical address of said AP in the said business recovery request message;
Reception comprises IP address and the port numbers of said AC from the business recovery response message of said AC in the said business recovery response message, and the business recovery information of said AP;
According to IP address and the port numbers of said AC, the session of recovery and said AC, and to said AC transmission keep-alive message, so that said AC upgrades local state machine;
Recover professional according to said business recovery information.
7. method according to claim 6 is characterized in that, before AC sent the business recovery request message, said method also comprised at said AP:
Generate failure notice message, comprise physical address and the failure cause of said AP in the said failure notice message;
Send said failure notice message to said AC.
8. according to claim 6 or 7 described methods, it is characterized in that said business recovery information comprises AP configuration information and user service information, said AP configuration information comprises RF configuration information and virtual access point VAP configuration information.
9. method according to claim 8, saidly recover business according to said business recovery information and specifically comprise:
According to said RF configuration information, recover the RF configuration of said AP;
According to said VAP configuration information, recover the business configuration of said AP;
According to said user service information, recover business again through the user of said AP access.
10. an access controller AC is characterized in that, comprises receiver, query unit, and acquiring unit and transmitter, wherein:
Said receiver is used to receive the business recovery request message from access point AP, comprises the physical address of said AP in the said business recovery request message;
Said query unit is used for the physical address inquiry recovering information table according to said AP, comprises the AP physical address in the said recovering information table;
Said acquiring unit when the AP physical address that is used for having an existing record when said recovering information table is identical with the physical address of said AP, according to the physical address of said AP, obtains the business recovery information of said AP;
Said transmitter is used for sending the business recovery response message to said AP, comprises the said business recovery information that said acquiring unit obtains in the said business recovery response message.
11. AC according to claim 10 is characterized in that,
Said receiver also is used to receive the failure notice message from said AP, comprises physical address and the failure cause of said AP in the said failure notice message;
Said AC also comprises:
Record cell is used for when said failure cause is said AP abnormal failure, the physical address of the said AP of record in said recovering information table.
12. AC according to claim 11 is characterized in that, said record cell also is used for the business recovery information at the said recovering information table said AC of record and the session information of said AP, said AP.
13. AC according to claim 11; It is characterized in that; Said record cell also is used for the access point identity AP ID at the said AP of said recovering information table record, and identifies local corresponding session information and the business recovery information of said AP ID of preserving of said AC.
14. an access point AP is characterized in that, comprises transmitter, receiver, and first recovery unit and second recovery unit, wherein:
Said transmitter is used for sending the business recovery request message to access controller AC, comprises the physical address of said AP in the said business recovery request message.
Said receiver is used to receive the business recovery response message from said AC, comprises IP address and the port numbers of said AC in the said business recovery response message, and the business recovery information of said AP;
Said first recovery unit according to IP address and the port numbers of said AC, recovers the session with said AC;
Said second recovery unit is used for recovering professional according to said business recovery information;
Said transmitter also is used for sending keep-alive message to said AC, so that said AC upgrades the state of the local said AP that preserves.
15. AP according to claim 14 is characterized in that, said AP also comprises generation unit;
Said generation unit is used to generate failure notice message, comprises physical address and the failure cause of said AP in the said failure notice message;
Said transmitter also is used for sending said failure notice message to said AC.
16., it is characterized in that said business recovery information comprises AP configuration information and user service information according to claim 14 or 15 described AP, said AP configuration information comprises RF configuration information and virtual access point VAP configuration information;
Correspondingly, said second recovery unit specifically is used for,
According to said RF configuration information, recover the RF configuration of said AP;
According to said VAP configuration information, recover the business configuration of said AP;
According to said user service information, recover business through the user of said AP access.
17. the system of business recovery is characterized in that among the WLAN WLAN, comprises like any described access controller AC in the claim 10 to 13 with like any described access point AP in the claim 14 to 16.
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