CN103686854A - Method and device for controlling AP - Google Patents
Method and device for controlling AP Download PDFInfo
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- CN103686854A CN103686854A CN201210344150.5A CN201210344150A CN103686854A CN 103686854 A CN103686854 A CN 103686854A CN 201210344150 A CN201210344150 A CN 201210344150A CN 103686854 A CN103686854 A CN 103686854A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
Abstract
The invention discloses a method device for controlling an AP. The method comprises the following steps: a switch records the obtained information of a data packet transmitted between the AP and an AC, wherein the switch is connected between the AP and the AC; the switch controls the AP according to the information. The method and the device solve the technical problem that control over the AC is focused on the AC so that the load on the AC is excessive in the prior art, achieve the purpose of enhancing the control effect on the AP, also relieve the control load on the AC, and more effectively control the AP.
Description
Technical field
The present invention relates to the communications field, in particular to the method and apparatus of a kind of control wireless access points (Wireless Access Point, referred to as AP).
Background technology
CAPWAP agreement is a general tunnel protocol, complete AP and find the basic agreement functions such as AC, irrelevant with concrete wireless access technology, its major function has been that AP finds wireless access controller (WirelessAccess Controller automatically, referred to as AC), AC carries out safety certification to AP, and AP obtains software image from AC, and AP obtains initial and dynamic-configuration etc. from AC.The load information that the transmission of CAPWAP protocol transmission layer is two types: data-message and control message.CAPWAP for carrying the data message of data-message and being that User Datagram Protoco (UDP) (User Datagram Protocol, referred to as UDP) port based on different sends for the control message of Bearer Control message.
The use of CAPWAP agreement starts from the discovery stage of whole flow process.When AP sends a discovery request message, any AC that receives this request will respond one and find response message.After receiving discovery response message, AP selects an AC to set up a secured session based on DTLS.After session key agreement success, both sides just can adopt with a session key and communicate.
Once AP and AC have completed DTLS session establishment, will exchange configuration between the two, be used for reaching an agreement on version information.In this exchange process, AP may receive regulation setting, then can open these settings.Between AP and AC, complete the exchange of version and setting, and AP opens, CAPWAP agreement will be used to encapsulate the wireless data frame sending between AC and AP.
The reliable mechanism of CAPWAP agreement requires message in pairs necessary, that is, message must be comprised of request message and response message simultaneously.The value of message types of all request messages is all odd number, and the value of message types of all responses is all even number.If WTP or AC have received a unacquainted message, and type of message is odd number, and WTP or AC can add one by this value of message types so, then respond to sender, and in response with on the sign of " unacquainted type of message ".If unacquainted type of message is even number, show that this message itself should be response message and should not sending as request message, so WTP or AC will ignore this message.
The control message of CAPWAP mainly contains following several classification:
1) find message, for the AC of discovering network, the position of AC and capacity;
2) add message, AP is used for to AC request service, and AC is used for responding AP;
3) maintain control channel;
4) AC sends configuration file to AP;
5) AC sends wireless connectivity devices strategy to AP;
6) request and transmission firmware are to AP;
7) AC and AP, for the CAPWAP management information of exchange agreement appointment, are only the connection state informations of a wireless connectivity devices of exchange sometimes.
At the above-mentioned type 3) information that maintains control channel comprises AP heartbeat packet, mainly comprises two kinds of message of Echo Request and Echo Response, while controlling message for not transmitting between AP and AC, comes explicitly to maintain the connection of control channel.
At present, in " thin " AP of AP+AC framework, to the control of AP, be mainly that AC passes through CAPWAP agreement and realizes, main control still concentrates on AC side, the burden of so corresponding AC is just heavier, AP also needs to access AC by switch simultaneously, and therefore, the control effect that AC controls AP neither be fine.
For above-mentioned problem, effective solution is not yet proposed at present.
Summary of the invention
The invention provides the method and apparatus of a kind of AP of control, at least to solve the OL technical problem of the AC that in prior art, the control of AC is all concentrated on to AC and cause.
According to an aspect of the present invention, provide the method for AP of control a kind of, having comprised: the information of the packet transmitting between the AP that switch record gets and AC, wherein, above-mentioned switch is connected between above-mentioned AP and above-mentioned AC; Above-mentioned switch is controlled above-mentioned AP according to above-mentioned information.
Preferably, above-mentioned switch is controlled and is comprised above-mentioned AP according to above-mentioned information: above-mentioned switch sends the frequency of above-mentioned packet above-mentioned AP is controlled according to above-mentioned AP.
Preferably, above-mentioned switch sends the frequency of above-mentioned packet above-mentioned AP is controlled and comprised according to above-mentioned AP: when above-mentioned switch detects the above-mentioned packet that does not receive in the given time one or more AP transmissions, above-mentioned switch is restarted these one or more AP.
Preferably, above-mentioned switch is restarted and is comprised these one or more AP: above-mentioned switch determines whether the port on the switch that these one or more AP are corresponding possesses POE function; If possessed, by the POE function of above-mentioned port, these one or more AP are restarted.
Preferably, after to this, one or more AP are restarted, said method also comprises: above-mentioned switch is determined the number of times of each ap reboot in above-mentioned one or more AP; The AP that above-mentioned switch is greater than frequency threshold value by the number of times of restarting in these one or more AP reports webmaster.
Preferably, above-mentioned switch sends the frequency of above-mentioned packet above-mentioned AP is controlled and comprised according to above-mentioned AP: when above-mentioned switch detects the frequency that exist to send above-mentioned packet and is greater than one or more AP of predetermined frequency threshold, above-mentioned switch reports these one or more AP webmaster or closes this one or more AP.
Preferably, above-mentioned data comprise: for maintaining the AP heartbeat packet being connected of the control channel between above-mentioned AP and above-mentioned AC.
According to a further aspect in the invention, provide the device of a kind of AP of control, be arranged in switch, having comprised: record cell, for recording the information of the packet transmitting between the AP that gets and AC, wherein, above-mentioned switch is connected between above-mentioned AP and above-mentioned AC; Control unit, for controlling above-mentioned AP according to above-mentioned information.
Preferably, above-mentioned control unit comprises: control module, for send the frequency of above-mentioned packet according to above-mentioned AP, above-mentioned AP is controlled.
Preferably, above-mentioned control module comprises: restart submodule, while not receiving in the given time for detecting when above-mentioned switch the above-mentioned packet that one or more AP send, these one or more AP are restarted.
In the present invention, by the switch being connected between AP and AC, realize the control to AP, concrete, switch is determined the state of AP by the transmission of the packet between AP and AC, thereby realizes the effective control to AP.Solved by the way the OL technical problem of the AC that in prior art, the control of AC is all concentrated on to AC and cause, reached and strengthened the object to the control effect of AP, the control burden that has also alleviated AC has realized more effectively to be controlled AP.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to a kind of preferred flow charts of the method for the control AP of the embodiment of the present invention;
Fig. 2 is according to the another kind of preferred flow charts of the method for the control AP of the embodiment of the present invention;
Fig. 3 is a kind of preferred structure block diagram according to the device of the control AP of the embodiment of the present invention;
Fig. 4 is the another kind of preferred structure block diagram according to the device of the control AP of the embodiment of the present invention;
Fig. 5 is a kind of preferred flow charts that AP heartbeat packet is detected according to the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
The embodiment of the present invention provides the method for preferred control AP a kind of, and as shown in Figure 1, the method comprises the following steps:
Step S102: the information of the packet transmitting between the AP that switch record gets and AC, wherein, switch is connected between AP and AC;
Step S104: switch is controlled AP according to above-mentioned information.
In above-mentioned preferred implementation, by the switch being connected between AP and AC, realize the control to AP, concrete, switch is determined the state of AP by the transmission of the packet between AP and AC, thereby realizes the effective control to AP.Solved by the way the OL technical problem of the AC that in prior art, the control of AC is all concentrated on to AC and cause, reached and strengthened the object to the control effect of AP, the control burden that has also alleviated AC has realized more effectively to be controlled AP.
When switch is controlled AP according to the packet between AP and AC, the frequency that switch can send described packet according to AP is controlled described AP.That is the frequency of, being given out a contract for a project by AP is determined the state that AP is current.For example: switch can determine that whether AP state is normal by monitoring echo message, abnormal AP equipment is passed through to the POE reset function of port simultaneously, realizes AP power-down rebooting.
In a preferred implementation, described switch sends the frequency of described packet described AP is controlled and comprised according to described AP: when described switch detects the described packet that does not receive in the given time one or more AP transmissions, described switch is restarted these one or more AP.That is, if do not receive the packet that certain AP sends in regular hour length always, can think that this AP is in abnormality, just can carry out reboot operation to this AP this time.
When AP is restarted, can utilize the POE(Power Over Ethernet of port) function realization, POE refers in the situation that existing Ethernet Cat.5 wiring architecture does not make any changes, when being some IP-based terminals (as IP phone machine, wireless local network connecting point AP, web camera etc.) transmission of data signals, kind equipment provides the technology of direct current supply for this reason.POE technology can guarantee the normal operation of existing network to have reduced to greatest extent cost when guaranteeing existing structured wiring safety.Preferably, utilizing POE function to reset while restarting to AP, can carry out in such a way: switch determines whether the port on the switch that these one or more AP are corresponding possesses POE function; If possessed, by the POE function of described port, these one or more AP are restarted.That is, in the present embodiment, only have to possessing the connected AP of POE function on port corresponding to switch and could realize and restarting by POE function.
In order further to improve the control to AP, switch can be added up the number of times of AP power-down rebooting, like this if because of breaking down AP inside, and these faults are not restarted with regard in soluble situation, switch just can be set a frequency threshold value, if the number of times of restarting has been greater than this threshold value, so just can, by this reporting events to webmaster, by webmaster, this abnormal AP be processed.In a preferred implementation, after to this, one or more AP are restarted, as shown in Figure 2, said method is further comprising the steps of:
Step S202: switch is determined the number of times of each ap reboot in one or more AP;
Step S204: the AP that switch is greater than frequency threshold value by the number of times of restarting in these one or more AP reports webmaster.
Above-mentioned, be mainly if that the keep-alive packet that AP sends is not received in explanation in the given time always, just think that this AP is out of order, just carries out reboot operation to it.Yet, AP also may appear at sometime that in section, to send the number of times of packet too frequent, also may be that what problem or fault have appearred in AP inside this time, like this situation be not just restart soluble, this time, the fault AP that also this can be detected reports webmaster, by webmaster, is further processed or is frequently sent in order to reduce this AP the resource consumption that packet brings, and can close the AP that this breaks down.In a preferred implementation, described switch sends the frequency of described packet described AP is controlled and comprised according to described AP: when described switch detects the frequency that exist to send described packet and is greater than one or more AP of predetermined frequency threshold, described switch reports these one or more AP webmaster or closes this one or more AP.
In above-mentioned each preferred implementation, above-mentioned data include but not limited to for maintaining the AP heartbeat packet being connected of the control channel between described AP and described AC, for example, and the CAPWAP of echo request/echo response type bag.
The device of a kind of AP of control is also provided in the present embodiment, and this device is used for realizing above-described embodiment and preferred implementation, has carried out repeating no more of explanation.As used below, term " unit " or " module " can realize the combination of software and/or the hardware of predetermined function.Although the described device of following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.Fig. 3 is a kind of preferred structure block diagram according to the device of the control AP of the embodiment of the present invention, as shown in Figure 3, comprising: record cell 302 and control unit 304, describe this structure below.
Control unit 304, with record cell 302 couplings, for described AP being controlled according to described information.
In a preferred implementation, as shown in Figure 4, above-mentioned control unit 304 comprises: control module 402, for send the frequency of described packet according to described AP, described AP is controlled.
In a preferred implementation, described control module comprises: restart submodule, while not receiving in the given time for detecting when described switch the described packet that one or more AP send, these one or more AP are restarted.
The present embodiment is to realize the status monitoring of AP and automatically reset function in the situation that switch is supported POE function, thereby has widened the range of management to AP, has realized the unartificial of AP and has automatically reset.For making self system hang dead situation because produce fault in AP running, no longer need manually by plug power supply or control by restarting switch.Exchange opportunity is made regular check on the heartbeat detection bag of AP, and for do not receive the AP of AP heartbeat packet in special time always, the POE of its corresponding ports that automatically resets enables, thereby realizes the power-down rebooting of AP, and AP can normally be moved.
To achieve these goals, the embodiment of the present invention provides a kind of and has scanned by the UDP bag to the specific purpose port numbers of extracting, according to the sweep spacing of setting with allow the specific duration of not receiving bag to analyze, thus the method for realization to the automatic management of the AP under all of the port in switch.Below in conjunction with specific embodiment, be described in greater detail:
1) realizing the prerequisite that AP heartbeat packet detects is that port PO E enabled state is set, and POE enables to comprise two kinds of conventional power supply and constrained feeds.During conventional power supply, can carry out power-off restarting to port, during constrained feed, can not carry out power-off restarting to port, preferred, in preferred present embodiment, what realize that the detection of AP heartbeat packet used is conventional function of supplying power.
2) need on exchange chip, realize the abstraction function of CAPWAP bag, an acl rule can be set on exchange chip, detect by the protocol package of this exchange chip.For type of message, be UDP, the CAPWAP bag that destination slogan is 5246, delivers to AP heartbeat packet Check processing program and processes.Preferably; can copy extraction to meeting the message of above-mentioned requirements; copy portion and deliver to AP heartbeat packet Check processing program, message originally still completes the link keep-alive of AP and AC according to original flow process, thereby can effectively avoid the impact on original system program.
3) switch ports themselves is by handing over twisted wire cable connect AP and configure vlan information.Under each port, by twisted-pair cable, connect an AP, AP only need to power by twisted-pair cable, no longer needs connecting power line.Under port, connect after an AP, the POE that opens port enables, and AP is carried out to routine power supply.Preferably, for guarantee under port the POE power-off on link with restart meaningful: first need whether the Link State of detection port is UP, and guarantee have AP to be connected under port; Secondly, need the POE switch of detection port whether to enable, only enabled the port of POE function, just can carry out power-off and reboot process to it.AP system is after starting startup, and switch ports themselves state is shown as UP.Meanwhile, on port, configure vlan information, guarantee AP system get up after can and AC between carry out proper communication.
4) from port AP heartbeat detection, enable to start to record various detection data.After port AP heartbeat detection enables, open the CAPWAP bag bag function of port, for example, can record port AP heartbeat detection and enable the time of opening, according to this time, can calculate the detection of port heartbeat packet and enable duration; Can also be according to carry information and the length scale of bag, the quality of judgement bag, for adding up rascal number; Receive that, after bag, packet receiving number adds 1 at every turn; If do not receive an AP heartbeat packet in setting interval, AP under port is carried out to power-off restarting, the time that record is restarted simultaneously, and add 1 to restarting number of times.By to the statistics of these records and analysis, realize the effective management to AP.
5) packet receiving alarm number, ap reboot number of times alarm and extremely tactful in the unit interval in setting unit review time, the ap reboot time interval, unit interval under each port.Mainly can have but be not limited to following several strategy:
1), from port AP heartbeat detection enables, each unit review time can be carried out statistics and analysis to the data of record; If ap reboot is not received AP heartbeat packet in the time interval, AP is restarted;
2) when the packet receiving number within the unit interval is greater than the alarm number of setting, report packet receiving number warning information, this warning information can be reported to the webmaster on upper strata, to realize the processing of AP or control.
3) within the unit interval, the alarm threshold that number of times is greater than setting of restarting of AP is, report and alarm information.
Preferably, after receiving alarm, webmaster can carry out following processing to AP, for example: alarm, alarm are also restarted AP and alarm close AP.
By the way, after the configuration of AP heartbeat detection under completing port, when AP occurs that when abnormal, switch can complete the management to AP automatically.When extremely cannot work appears in AP, switch can carry out power-off restarting to AP, thereby removes manually-operated complexity from, has improved the efficiency of management AP.
The present embodiment also provides a kind of AP heartbeat packet to detect realization flow, as shown in Figure 5, comprises the following steps:
Step S502: port open AP heartbeat packet detects and enables, and the port only enabling, just can carry out the detection of AP heartbeat packet, record enables the time simultaneously.
Step S504: port is arranged to a time interval, open simultaneously a timer to this time interval carry out countdown and port packet receiving state judges, if do not receive AP heartbeat packet at this moment in interval, think that the AP under this port occurs abnormal, AP under port is carried out to power-off restarting, restart number of times and add 1.
Step S506: receive after AP heartbeat packet at port, the time that heartbeat packet received in record, packet receiving number adds 1, changes the packet receiving state of port simultaneously.
Step S508: in the unit interval, the data of record are added up, when the data of statistics are greater than setting threshold values, reporting information is also carried out corresponding strategy.
By the way, in the situation that switch has port PO E function, realized switch and carried out resetting automatically management to the state-detection of AP and to the AP breaking down.Switch, no longer only for forwarding data, also can be managed AP simultaneously automatically, has not only widened the original function of switch, has also realized the flexible control to AP.
In another embodiment, also provide a kind of software, the technical scheme that this software is described for carrying out above-described embodiment and preferred implementation.
In another embodiment, also provide a kind of storage medium, stored above-mentioned software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
From above description, can find out, the present invention has realized following technique effect: by the switch being connected between AP and AC, realize the control to AP, and concrete, switch is determined the state of AP by the transmission of the packet between AP and AC, thereby realizes the effective control to AP.Solved by the way the OL technical problem of the AC that in prior art, the control of AC is all concentrated on to AC and cause, reached and strengthened the object to the control effect of AP, the control burden that has also alleviated AC has realized more effectively to be controlled AP.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a method of controlling AP, is characterized in that, comprising:
The information of the packet transmitting between the AP that switch record gets and AC, wherein, described switch is connected between described AP and described AC;
Described switch is controlled described AP according to described information.
2. method according to claim 1, is characterized in that, described switch is controlled and comprised described AP according to described information:
Described switch sends the frequency of described packet described AP is controlled according to described AP.
3. method according to claim 2, is characterized in that, described switch sends the frequency of described packet described AP is controlled and comprised according to described AP:
When described switch detects the described packet that does not receive in the given time one or more AP transmissions, described switch is restarted these one or more AP.
4. method according to claim 3, is characterized in that, described switch is restarted and comprised these one or more AP:
Described switch determines whether the port on the switch that these one or more AP are corresponding possesses POE function;
If possessed, by the POE function of described port, these one or more AP are restarted.
5. according to the method described in claim 3 or 4, it is characterized in that, after to this, one or more AP are restarted, described method also comprises:
Described switch is determined the number of times of each ap reboot in described one or more AP;
The AP that described switch is greater than frequency threshold value by the number of times of restarting in these one or more AP reports webmaster.
6. method according to claim 2, is characterized in that, described switch sends the frequency of described packet described AP is controlled and comprised according to described AP:
When described switch detects the frequency that exist to send described packet and is greater than one or more AP of predetermined frequency threshold, described switch reports these one or more AP webmaster or closes this one or more AP.
7. according to the method described in any one in claim 1 to 6, it is characterized in that, described data comprise: for maintaining the AP heartbeat packet being connected of the control channel between described AP and described AC.
8. a device of controlling AP, is characterized in that, is arranged in switch, comprising:
Record cell, for recording the information of the packet transmitting between the AP that gets and AC, wherein, described switch is connected between described AP and described AC;
Control unit, for controlling described AP according to described information.
9. device according to claim 8, is characterized in that, described control unit comprises:
Control module, controls described AP for send the frequency of described packet according to described AP.
10. device according to claim 9, is characterized in that, described control module comprises:
Restart submodule, while not receiving in the given time for detecting when described switch the described packet that one or more AP send, these one or more AP are restarted.
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| CN201210344150.5A CN103686854B (en) | 2012-09-17 | 2012-09-17 | The method and apparatus for controlling AP |
| PCT/CN2013/081386 WO2014040466A1 (en) | 2012-09-17 | 2013-08-13 | Method and device for controlling ap |
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| CN201210344150.5A CN103686854B (en) | 2012-09-17 | 2012-09-17 | The method and apparatus for controlling AP |
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| WO2015085715A1 (en) * | 2013-12-10 | 2015-06-18 | 中兴通讯股份有限公司 | Method for processing radio access, forwarding device, and network controller |
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| CN106060859A (en) * | 2016-06-30 | 2016-10-26 | 杭州华三通信技术有限公司 | AP (Access Point) fault detection and restoration method and device |
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| WO2014040466A1 (en) | 2014-03-20 |
| CN103686854B (en) | 2018-05-04 |
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