CN107682888A - A kind of cloud AC redundancy backup systems and method - Google Patents

A kind of cloud AC redundancy backup systems and method Download PDF

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Publication number
CN107682888A
CN107682888A CN201711057153.XA CN201711057153A CN107682888A CN 107682888 A CN107682888 A CN 107682888A CN 201711057153 A CN201711057153 A CN 201711057153A CN 107682888 A CN107682888 A CN 107682888A
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capwap
network protocol
protocol processing
monitoring
dispatching
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CN107682888B (en
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周游
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SUZHOU HANMING TECHNOLOGY CO LTD
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SUZHOU HANMING TECHNOLOGY CO LTD
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
    • H04L41/0836—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability to enhance reliability, e.g. reduce downtime
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/12—Application layer protocols, e.g. WAP [Wireless Application Protocol]

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

Abstract

The invention discloses a kind of cloud AC redundancy backup systems and method, and it is to be based on N:M Backups form, and wherein N is to enliven CAPWAP network protocol processing engine numbers, and M is backup CAPWAP network protocol processing engine numbers.Cloud AC management capacities can be according to the seamless dilatation of actual wireless business demand, when dispatching and monitoring handles example or CAPWAP network protocol processing engines break down, corresponding backed-up instance can be quickly switched into, ensure cloud AC systems when software or hardware fault occurs in single processing example, reliability service is remained to, ensures that wireless traffic does not interrupt.

Description

A kind of cloud AC redundancy backup systems and method
Technical field
The present invention relates to cloud storage technical field, particularly relates to a kind of cloud AC redundancy backup systems and method.
Background technology
Traditional wlan network is mainly made up of AC (Access Controller) and AP (Access Point), and AC is one Platform physical network device, the AP being responsible in LAN, it can be managed collectively and be monitored with more AP in local area network.
With the proposition of business event high in the clouds demand, traditional AC gradually migrates to high in the clouds AC, and high in the clouds AC has magnanimity AP managerial abilities, if there is software or hardware fault, the wireless traffic for causing large area is interrupted, influenceed on user WiFi Net.
Therefore, the present inventor needs a kind of new technology of design badly to improve its problem.
The content of the invention
The present invention is intended to provide a kind of cloud AC redundancy backup systems and method, it is soft that it can handle example appearance in separate unit When part, hardware or link failure, remain to ensure that wireless traffic does not interrupt reliability service.
In order to solve the above technical problems, the technical scheme is that：
A kind of cloud AC redundancy backup systems, including：
Enliven CAPWAP network protocol processing engines pond, including it is N number of enliven CAPWAP network protocol processing engines, for handle and AP, The related wireless traffic of terminal；
Backup CAPWAP network protocol processing engines pond, including M backup CAPWAP network protocol processing engine, for when the scheduling When monitoring resource pool monitors that some enlivens CAPWAP network protocol processing engine failures, substituted by backup CAPWAP network protocol processing engines The original to break down enlivens CAPWAP network protocol processing engines, ensures that wireless traffic does not interrupt；
Dispatching and monitoring resource pool, including master scheduling monitoring example and standby dispatching and monitoring example, for handling point of AP business Hair scheduling and CAPWAP network protocol processing engines condition monitoring, and when enliven CAPWAP network protocol processing engines break down when, Activate backup CAPWAP network protocol processing engines；
Condition monitoring resource pool, for monitoring the running status of master scheduling monitoring example and standby dispatching and monitoring example, work as master During dispatching and monitoring Instance failure, the dispatching and monitoring feelings of backup dispatching and monitoring example recovery system directly from condition monitoring resource pool Condition, upgrade to master scheduling monitoring example, safeguards system business, which is not interrupted, to be continued to run with.
Preferably, in addition to：
Radio service data base resource pond, it includes AP configuration databases and AP running status memory databases, wherein institute State AP configuration databases to be used to store radio configuration, the AP running state datas storehouse is used to store real-time running state, described Real-time running state includes but is not limited to AP CAPWAP states, AP running statuses, access terminal state and authentication and accounting state.
Preferably, the master scheduling monitoring example and the standby dispatching and monitoring example are carried out therebetween using VRRP mechanism Redundancy backup, when the master scheduling monitors Instance failure, start the standby dispatching and monitoring example and carry out normal CAPWAP industry Business distribution and scheduling.
Preferably, the dispatching and monitoring resource pool is monitored based on BFD mechanism to enlivening CAPWAP network protocol processing engines.
Preferably, the wireless traffic includes but is not limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and terminal shape State is complained to, terminal authentication, terminal roaming.
A kind of method based on cloud AC redundancy backup systems described above, comprises the following steps：
S1：Dispatching and monitoring resource pool receives CAPWAP message, is scheduled distribution decision-making and distributes decision-making according to the scheduling As a result by CAPWAP message be sent to it is optimal enliven CAPWAP network protocol processing engines, while update condition monitoring resource pool；
S2：CAPWAP network protocol processing engines are enlivened to complete wireless traffic processing while update radio service data base resource Pond, wherein the wireless traffic includes but is not limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and the SOT state of termination are complained to, Terminal authentication, terminal roaming；
S3：The dispatching and monitoring resource pool is monitored based on BFD mechanism to enlivening CAPWAP network protocol processing engines, works as prison Measure and enter step S4 when enlivening CAPWAP network protocol processing engine failures；
S4：The suitable backup CAPWAP network protocol processing engines of dispatching and monitoring resource pool selection, activate backup CAPWAP associations View processing engine, while backup CAPWAP network protocol processing engines recover failure original actively from radio service data base resource pond The AP of CAPWAP network protocol processing engines, wireless terminal, the wireless traffic state of authentication and accounting correlation, and take over its wireless traffic.
Preferably, the step S1 is specifically included：
S11：Dispatching and monitoring resource pool carries out comprehensive according to the resource situation enlivened in CAPWAP network protocol processing engine resource pools Close and assess, make scheduling distribution decision-making, decision-making, which goes out, optimal enlivens CAPWAP network protocol processing engines；It is wherein described to enliven CAPWAP Resource situation in network protocol processing engine resource pool includes but is not limited to AP load conditions, AP deployment orientations, processor load；
S12：Dispatching and monitoring resource pool distributes the result of decision according to scheduling, and CAPWAP message is sent into optimal enliven CAPWAP network protocol processing engines；This enlivens CAPWAP network protocol processing engines and completes wireless traffic processing；
Dispatching and monitoring example will dispatch distribution result of decision write state monitoring resource pool simultaneously, when master scheduling monitors example During failure, backup dispatching and monitoring example can directly from condition monitoring resource pool recovery system dispatching and monitoring situation, upgrade to Master scheduling monitors example, and safeguards system business, which is not interrupted, to be continued to run with.
Preferably, the step S3 is specifically included：
S31：Dispatching and monitoring resource pool periodically sends ECHO request heartbeat messages to CAPWAP network protocol processing engines, After CAPWAP network protocol processing engines receive ECHO request heartbeat messages, ECHO back messages are replied；
S32：After dispatching and monitoring resource pool receives ECHO back messages, actively established with the CAPWAP network protocol processing engines BFD sessions, the state of the CAPWAP network protocol processing engines is monitored by BFD sessions.
Preferably, in addition to step S0：
AP sends CAPWAP protocol massages to dispatching and monitoring resource pool.
Preferably, the wireless traffic includes but is not limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and terminal shape State is complained to, terminal authentication, terminal roaming.
Using above-mentioned technical proposal, the present invention comprises at least following beneficial effect：
Cloud AC redundancy backup systems of the present invention and method, it is to be based on N：M Backups form, wherein N It is to enliven CAPWAP network protocol processing engine example numbers, M is backup CAPWAP network protocol processing engine numbers.Cloud AC management capacities can According to the seamless dilatation of actual wireless business demand, handle example in dispatching and monitoring or CAPWAP network protocol processing engines break down When, corresponding backed-up instance can be quickly switched into, ensures cloud AC systems when software or hardware fault occurs in single processing example, Reliability service is remained to, ensures that wireless traffic does not interrupt.
Brief description of the drawings
Fig. 1 is the structural representation of cloud AC redundancy backup systems of the present invention；
Fig. 2 is the flow chart of cloud AC redundancy backup methods of the present invention；
Fig. 3 is the flow chart of the cloud AC redundancy backup methods described in an embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.
Embodiment 1
As shown in figure 1, to meet a kind of cloud AC redundancy backup systems of the present invention, including：
Enliven CAPWAP network protocol processing engines pond, including it is N number of enliven CAPWAP network protocol processing engines, for handle and AP, The related wireless traffic of terminal；
Backup CAPWAP network protocol processing engines pond, including M backup CAPWAP network protocol processing engine, for when the scheduling When monitoring resource pool monitors that some enlivens CAPWAP network protocol processing engine failures, substituted by backup CAPWAP network protocol processing engines The original to break down enlivens CAPWAP network protocol processing engines, ensures that wireless traffic does not interrupt；
Dispatching and monitoring resource pool, including master scheduling monitoring example and standby dispatching and monitoring example, for handling point of AP business Hair scheduling and CAPWAP network protocol processing engines condition monitoring, and when enliven CAPWAP network protocol processing engines break down when, Activate backup CAPWAP network protocol processing engines；
Condition monitoring resource pool, for monitoring the running status of master scheduling monitoring example and standby dispatching and monitoring example, work as master During dispatching and monitoring Instance failure, the dispatching and monitoring feelings of backup dispatching and monitoring example recovery system directly from condition monitoring resource pool Condition, upgrade to master scheduling monitoring example, safeguards system business, which is not interrupted, to be continued to run with.
Preferably, in addition to：
Radio service data base resource pond, it includes AP configuration databases and AP running status memory databases, wherein institute State AP configuration databases to be used to store radio configuration, the AP running state datas storehouse is used to store real-time running state, described Real-time running state includes but is not limited to AP CAPWAP states, AP running statuses, access terminal state and authentication and accounting state.
Preferably, the master scheduling monitoring example and the standby dispatching and monitoring example are carried out therebetween using VRRP mechanism Redundancy backup, when the master scheduling monitors Instance failure, start the standby dispatching and monitoring example and carry out normal CAPWAP industry Business distribution and scheduling.
Preferably, the dispatching and monitoring resource pool is monitored based on BFD mechanism to enlivening CAPWAP network protocol processing engines.
Preferably, the wireless traffic includes but is not limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and terminal shape State is complained to, terminal authentication, terminal roaming.
The present embodiment is to be based on N：M Backups form, and wherein N is to enliven CAPWAP network protocol processing engine examples Number, M are backup CAPWAP network protocol processing engine numbers, and to reduce deployment maintenance cost, M can be less than N.Cloud AC management capacities It can handle example according to the seamless dilatation of actual wireless business demand at dispatching and monitoring or CAPWAP network protocol processing engines break down When, corresponding backed-up instance can be quickly switched into, ensures cloud AC systems when software or hardware fault occurs in single processing example, Reliability service is remained to, ensures that wireless traffic does not interrupt.
Embodiment 2
As shown in Fig. 2 for a kind of method of the cloud AC redundancy backup systems based on described in embodiment 1, comprise the following steps：
S1：Dispatching and monitoring resource pool receives CAPWAP message, is scheduled distribution decision-making and distributes decision-making according to the scheduling As a result by CAPWAP message be sent to it is optimal enliven CAPWAP network protocol processing engines, while update condition monitoring resource pool；
S2：CAPWAP network protocol processing engines are enlivened to complete wireless traffic processing while update radio service data base resource Pond, wherein the wireless traffic includes but is not limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and the SOT state of termination are complained to, Terminal authentication, terminal roaming；
S3：The dispatching and monitoring resource pool is monitored based on BFD mechanism to enlivening CAPWAP network protocol processing engines, works as prison Measure and enter step S4 when enlivening CAPWAP network protocol processing engine failures；
S4：The suitable backup CAPWAP network protocol processing engines of dispatching and monitoring resource pool selection, activate backup CAPWAP associations View processing engine, while backup CAPWAP network protocol processing engines recover failure original actively from radio service data base resource pond The AP of CAPWAP network protocol processing engines, wireless terminal, the wireless traffic state of authentication and accounting correlation, and take over its wireless traffic.
Preferably, the step S1 is specifically included：
S11：Dispatching and monitoring resource pool carries out comprehensive according to the resource situation enlivened in CAPWAP network protocol processing engine resource pools Close and assess, make scheduling distribution decision-making, decision-making, which goes out, optimal enlivens CAPWAP network protocol processing engines；It is wherein described to enliven CAPWAP Resource situation in network protocol processing engine resource pool includes but is not limited to AP load conditions, AP deployment orientations, processor load；
S12：Dispatching and monitoring resource pool distributes the result of decision according to scheduling, and CAPWAP message is sent into optimal enliven CAPWAP network protocol processing engines；This enlivens CAPWAP network protocol processing engines and completes wireless traffic processing；
Dispatching and monitoring example will dispatch distribution result of decision write state monitoring resource pool simultaneously, when master scheduling monitors example During failure, backup dispatching and monitoring example can directly from condition monitoring resource pool recovery system dispatching and monitoring situation, upgrade to Master scheduling monitors example, and safeguards system business, which is not interrupted, to be continued to run with.
Preferably, the step S3 is specifically included：
S31：Dispatching and monitoring resource pool periodically sends ECHO request heartbeat messages to CAPWAP network protocol processing engines, After CAPWAP network protocol processing engines receive ECHO request heartbeat messages, ECHO back messages are replied；
S32：After dispatching and monitoring resource pool receives ECHO back messages, actively established with the CAPWAP network protocol processing engines BFD sessions, the state of the CAPWAP network protocol processing engines is monitored by BFD sessions.
Preferably, in addition to step S0：
AP sends CAPWAP protocol massages to dispatching and monitoring resource pool.
Preferably, the wireless traffic includes but is not limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and terminal shape State is complained to, terminal authentication, terminal roaming.
The present embodiment is illustrated with reference to Fig. 3.
1st, CAPWAP message is received：Examples of the AP into dispatching and monitoring resource pool sends CAPWAP protocol massages；
2nd, scheduling distribution decision-making：Master scheduling monitors example AP of the example in CAPWAP network protocol processing engine resource pools and born The resource situation comprehensive assessments such as load state, AP deployment orientations, processor load, decision-making go out optimal CAPWAP network protocol processing engines Example；
3rd, the result of decision：CAPWAP message is sent to optimal CAPWAP and assisted by dispatching and monitoring example according to the result of decision View processing engine；
4th, condition monitoring resource pool is updated：Dispatching and monitoring example will dispatch distribution result of decision write state monitoring resource Pond, when master scheduling monitor Instance failure when, backup dispatching and monitoring example can directly from condition monitoring resource pool recovery system Dispatching and monitoring situation, upgrade to master scheduling monitoring example, ensure that cloud AC system business does not interrupt and continue to run with；
5th, message is distributed to handling engine：Dispatching and monitoring resource pool distribution CAPWAP message to CAPWAP protocol processes are drawn Hold up；
6th, network protocol processing engine is handled：Processing engine completes configuration distributing, AP and the SOT state of termination are complained to, terminal roaming, recognizes Demonstrate,prove the processing of the wireless traffics such as charging；
7th, radio service data base resource pond is updated：The data storage of CAPWAP network protocol processing engines uses distributed data Storehouse framework, all AP configurations are stored in AP configuration databases, by AP real-time status, terminal real-time status and authentication and accounting Deng real-time running state data storage in AP running memory slip condition databases；
8th, processing engine interacts with dispatching and monitoring resource pool session heartbeat：Dispatching and monitoring example is periodically assisted to CAPWAP View processing engine sends ECHO request heartbeat messages, after CAPWAP network protocol processing engines receive ECHO request messages, can reply ECHO back messages；
9th, dispatching and monitoring resource pool monitors：After dispatching and monitoring resource pool receives ECHO back messages, dispatching and monitoring example master It is dynamic to establish BFD sessions with CAPWAP network protocol processing engines, the state of CAPWAP network protocol processing engines, BFD are monitored by BFD sessions (Bidirectional Forwarding Detection) is a kind of rapid link monitoring mechanism, uses BFD mechanism and ECHO Heartbeat conversation mechanism is interactive so that dispatching and monitoring example can reach with the failure detection time of CAPWAP network protocol processing engine examples Millisecond rank, reduce the time that processing engine hardware and software failure influences on wireless traffic to the full extent；
10th, standby processing engine handover decisions：Dispatching and monitoring example monitors CAPWAP network protocol processing engine failures, according to reality The number for enlivening CAPWAP protocol engines processing pond and backup CAPWAP network protocol processing engines pond of border deployment, select one properly Backup CAPWAP protocol engines processing example；
11st, decision-making is adjudicated：Dispatching and monitoring example selects backup CAPWAP network protocol processing engines, and judgment condition is idle backup The state of the number of network protocol processing engine and each backup idle protocol engine.The processing that prioritizing selection is in idle condition is drawn Hold up, if the processing engine without idle condition, select the lighter processing engine of AP portfolios.Therefore distribution decision-making has two kinds of knots Fruit, one idle network protocol processing engine of activation are main state or the AP of the processing engine to break down are dispatched into business load On lighter back-up processing engine；
12nd, the standby processing engine of notice switches to main process task engine：Dispatching and monitoring example is according to the result of decision, and activation is in sky The network protocol processing engine of not busy state；
13rd, finishing service switches：Backup CAPWAP network protocol processing engines recover event from radio service data base resource pond Hinder the AP, wireless terminal, authentication and accounting correlation wireless traffic state of CAPWAP network protocol processing engines, taking over fault CAPWAP agreements Handle the wireless traffic of engine.Monitoring and scheduling center assists the CAPWAP that the radio service data scheduling of failed engine is so far backed up View processing engine, until the CAPWAP network protocol processing engines of enlivening for monitoring failure recover normal condition.
Using above-mentioned technical proposal, the present invention comprises at least following beneficial effect：
1. wireless traffic can be supported to seamlessly switch to cloud AC from conventional physical AC, by multiple CAPWAP network protocol processing engines The network protocol processing engine resource pool of example composition, supports the seamless dilatation of cloud AC business, can manage the AP of 100,000 orders of magnitude.
2. dispatching and monitoring resource pool is monitored based on BFD mechanism to enlivening network protocol processing engine, Millisecond is realized Failover, when software, hardware or link failure occurs in separate unit processing example, remain to ensure that wireless traffic does not interrupt reliable fortune OK.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention. A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one The most wide scope caused.

Claims (10)

  1. A kind of 1. cloud AC redundancy backup systems, it is characterised in that including：
    Enliven CAPWAP network protocol processing engines pond, including it is N number of enliven CAPWAP network protocol processing engines, for handle and AP, terminal Related wireless traffic；
    Backup CAPWAP network protocol processing engines pond, including M backup CAPWAP network protocol processing engine, for when the dispatching and monitoring When resource pool monitors that some enlivens CAPWAP network protocol processing engine failures, substituted and occurred by backup CAPWAP network protocol processing engines The original of failure enlivens CAPWAP network protocol processing engines, ensures that wireless traffic does not interrupt；
    Dispatching and monitoring resource pool, including master scheduling monitoring example and standby dispatching and monitoring example, the distribution for handling AP business are adjusted The condition monitoring of degree and CAPWAP network protocol processing engines, and when enlivening the failure of CAPWAP network protocol processing engines, activate Backup CAPWAP network protocol processing engines；
    Condition monitoring resource pool, for monitoring the running status of master scheduling monitoring example and standby dispatching and monitoring example, work as master scheduling When monitoring Instance failure, the dispatching and monitoring situation of backup dispatching and monitoring example recovery system directly from condition monitoring resource pool, Upgrade to master scheduling monitoring example, safeguards system business, which is not interrupted, to be continued to run with.
  2. 2. cloud AC redundancy backup systems as claimed in claim 1, it is characterised in that also include：
    Radio service data base resource pond, it includes AP configuration databases and AP running status memory databases, wherein the AP Configuration database is used to store radio configuration, and the AP running state datas storehouse is used to store real-time running state, described real-time Running status includes but is not limited to AP CAPWAP states, AP running statuses, access terminal state and authentication and accounting state.
  3. 3. cloud AC redundancy backup systems as claimed in claim 1 or 2, it is characterised in that：The master scheduling monitoring example and institute State standby dispatching and monitoring example and carry out redundancy backup using VRRP mechanism therebetween, when the master scheduling monitors Instance failure, Start the standby dispatching and monitoring example and carry out normal CAPWAP distribution of services and scheduling.
  4. 4. the cloud AC redundancy backup systems as described in claim 1-3 is any, it is characterised in that：The dispatching and monitoring resource pool base It is monitored in BFD mechanism to enlivening CAPWAP network protocol processing engines.
  5. 5. the cloud AC redundancy backup systems as described in claim 1-4 is any, it is characterised in that：The wireless traffic is included but not It is limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and the SOT state of termination are complained to, terminal authentication, terminal roaming.
  6. A kind of 6. method based on any described cloud AC redundancy backup systems of claim 1-5, it is characterised in that including as follows Step：
    S1：Dispatching and monitoring resource pool receives CAPWAP message, is scheduled distribution decision-making and distributes the result of decision according to the scheduling By CAPWAP message be sent to it is optimal enliven CAPWAP network protocol processing engines, while update condition monitoring resource pool；
    S2：CAPWAP network protocol processing engines are enlivened to complete wireless traffic processing while update radio service data base resource pond, its Described in wireless traffic include but is not limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and the SOT state of termination is complained to, terminal is recognized Card, terminal roaming；
    S3：The dispatching and monitoring resource pool is monitored based on BFD mechanism to enlivening CAPWAP network protocol processing engines, when monitoring Enter step S4 when enlivening CAPWAP network protocol processing engine failures；
    S4：The suitable backup CAPWAP network protocol processing engines of dispatching and monitoring resource pool selection, are activated at backup CAPWAP agreements Engine is managed, while backup CAPWAP network protocol processing engines recover failure original actively from radio service data base resource pond The AP of CAPWAP network protocol processing engines, wireless terminal, the wireless traffic state of authentication and accounting correlation, and take over its wireless traffic.
  7. 7. cloud AC redundancy backup methods as claimed in claim 6, it is characterised in that the step S1 is specifically included：
    S11：Dispatching and monitoring resource pool integrate commenting according to the resource situation enlivened in CAPWAP network protocol processing engine resource pools Estimate, make scheduling distribution decision-making, decision-making, which goes out, optimal enlivens CAPWAP network protocol processing engines；It is wherein described to enliven CAPWAP agreements Resource situation in processing engine resource pond includes but is not limited to AP load conditions, AP deployment orientations, processor load；
    S12：Dispatching and monitoring resource pool distributes the result of decision according to scheduling, and CAPWAP message is sent to and optimal enlivens CAPWAP Network protocol processing engine；This enlivens CAPWAP network protocol processing engines and completes wireless traffic processing；
    Dispatching and monitoring example will dispatch distribution result of decision write state monitoring resource pool simultaneously, when master scheduling monitors Instance failure When, backup dispatching and monitoring example can directly from condition monitoring resource pool recovery system dispatching and monitoring situation, upgrade to homophony Degree monitoring example, safeguards system business, which is not interrupted, to be continued to run with.
  8. 8. cloud AC redundancy backup methods as claimed in claims 6 or 7, it is characterised in that the step S3 is specifically included：
    S31：Dispatching and monitoring resource pool periodically sends ECHO request heartbeat messages, CAPWAP to CAPWAP network protocol processing engines After network protocol processing engine receives ECHO request heartbeat messages, ECHO back messages are replied；
    S32：After dispatching and monitoring resource pool receives ECHO back messages, actively BFD meetings are established with the CAPWAP network protocol processing engines Words, the state of the CAPWAP network protocol processing engines is monitored by BFD sessions.
  9. 9. the cloud AC redundancy backup methods as described in claim 6-8 is any, it is characterised in that also including step S0：
    AP sends CAPWAP protocol massages to dispatching and monitoring resource pool.
  10. 10. the cloud AC redundancy backup methods as described in claim 6-9 is any, it is characterised in that：The wireless traffic include but It is not limited to the maintenance of CAPWAP state machines, AP configuration distributings, AP and the SOT state of termination are complained to, terminal authentication, terminal roaming.
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