CN103354501B - A kind of access point that controls supplies method and the access controller of power-off - Google Patents
A kind of access point that controls supplies method and the access controller of power-off Download PDFInfo
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Abstract
This application discloses a kind of method controlling access point confession power-off, the method includes: power or during power-off when AC controls AP, the corresponding relation of the AP that the port according to this AC self PoE equipment connected is powered with this PoE equipment, indicates this PoE equipment to be powered or power-off by corresponding port。Based on same application design, the application also proposes a kind of access controller, reduces network operation cost, and reliability is high。
Description
Technical field
The application relates to communication technical field, supplies method and the access controller of power-off particularly to a kind of access point that controls。
Background technology
Thin access point (FITAccessPoint, FITAP) focus of network is accessed as wireless client, with access controller (AccessController after startup, AC) wireless access point control and supply (ControllingandProvisioningofWirelessAccessPoint are set up, CAPWAP) tunnel, AC is by CAPWAP tunnel management, control AP。One AC can manage multiple stage AP simultaneously, AP needs individually power supply as a platform independent equipment, in order to reduce difficulty of construction and save cost, usual AP is direct-connected is supporting POE (PoweroverEthernet, PoE), on the switch of function, it is that AP powers while Double-strand transmission network signal。
In practical application, some personnel City Regions (such as railway station, arenas etc.) use an AP to tend not to meet user's request as accessing focus, need to consider focus encryption, namely arrange that multiple stage area coverage is suitable at the same area, configure identical AP, it is WLAN schematic diagram in existing realization referring to Fig. 1, Fig. 1。In Fig. 1, AP1, AP2, AP3 are all laid on region 1, AP2, AP3 is encryption access point。For energy-saving and emission-reduction, improve resource utilization, can select to close appropriate opportunity the encryption access point of some free time according to online user number, and when business is busy gradually, select to open encryption access point appropriate opportunity。In order to accurately realize opening, closing the purpose of specific AP, it is necessary to the supply port of clear and definite PoE equipment and the corresponding relation of AP。AC automatically controls power supply and the power-off of PoE port by the comparison of online client quantity with power-off, power supply threshold value, then realizes the open and close of AP。
Current AC is when controlling AP for power-off, it is necessary to artificial treatment。The mode using artificial treatment will bring a large amount of burden to the work of network manager, increase network operation cost and reliability is low, poor real。
Summary of the invention
In view of this, the application provides a kind of access point that controls to supply method and the access controller of power-off, reduces network operation cost, and reliability is high。
For solving above-mentioned technical problem, the technical scheme of the application is achieved in that
A kind of method controlling access point AP confession power-off, including:
Power or during power-off when access controller AC controls AP, the corresponding relation according to the AP that the port of this AC self POE PoE equipment connected is powered with this PoE equipment, indicate this PoE equipment to be powered or power-off by corresponding port。
A kind of access controller AC, this AC includes: processing unit；
Described processing unit, for powering or during power-off when controlling access point AP, the corresponding relation according to the AP that the port of this AC POE PoE equipment connected and this PoE equipment are powered, indicate this PoE equipment to be powered or power-off by corresponding port。
In sum, the application controls AP by AC in WLAN and powers or during power-off, the corresponding relation of the AP that the port of the PoE equipment that this AC self according to configuration connects and this PoE equipment are powered, this PoE equipment is indicated to be powered or power-off by corresponding port, reduce network operation cost, and reliability is high。
Accompanying drawing explanation
Fig. 1 is WLAN schematic diagram in existing realization；
Fig. 2 is that in the embodiment of the present application, AC controls the AP method flow schematic diagram for power-off；
Fig. 3 is WLAN schematic diagram in the embodiment of the present application；
Fig. 4 is the structural representation of the AC being applied to above-mentioned technology in the application specific embodiment。
Detailed description of the invention
For making the purpose of the application, technical scheme and advantage clearly understand, develop simultaneously embodiment referring to accompanying drawing, the application is described in further detail。
The embodiment of the present application proposes a kind of method controlling AP, AC in WLAN controls AP and powers or during power-off, the corresponding relation of the AP that the port according to this AC self PoE equipment connected is powered with this PoE equipment, this PoE equipment is indicated to be powered or power-off by corresponding port, reduce network operation cost, and reliability is high。
This WLAN includes AC, PoE equipment and AP, and wherein, the AP belonging to the same area can be added same focus group by AC。
In embodiments herein, the corresponding relation of the AP that the port of the PoE equipment that this AC self connects and this PoE equipment are powered, it is possible to after this WLAN is stable, AC is obtained by the mode automatically obtained。
Below in conjunction with accompanying drawing, describe in the application specific embodiment how to realize the mode by automatically obtaining in detail, it is thus achieved that the corresponding relation of the AP that the port of the PoE equipment that this AC self connects and this PoE equipment are powered。
It is that in the embodiment of the present application, AC controls the AP method flow schematic diagram for power-off referring to Fig. 2, Fig. 2。Concretely comprise the following steps:
Step 201, AC obtains MAC Address corresponding to all of the port of PoE equipment self connected and power supply state corresponding to port；Determine a corresponding MAC Address and the port powered。
AC can power to this AC AP controlled by multiple PoE equipment, now, arbitrary PoE equipment is all processed by the processing mode in the embodiment of the present application。
The media interviews that all of the port of the PoE equipment that this AC obtains is corresponding control (MAC) address, namely obtain the MAC Address that the port numbers of each port is corresponding, and wherein, the MAC Address that either end slogan is corresponding is one or more。Obtain the power supply state of each port for powering or not in power supply。
This AC determines only corresponding with MAC Address and power supply port。If the corresponding relation of port and MAC Address is not one_to_one corresponding, what illustrate that this port accesses is a network rather than an equipment。
The information of port and correspondence for corresponding multiple MAC Address do not abandon in the information of the port of power supply, only retain one MAC Address of correspondence of acquisition and the information that power supply state is the port powered。
This AC obtains MAC Address corresponding to all of the port and the power supply state information of PoE equipment, can obtain the mac address information in management information bank (MIB) node and power supply state information when implementing from described PoE equipment。Particularly as follows:
AC sends Simple Network Management Protocol (SimpleNetworkManagementProtocol to the PoE equipment self connected, SNMP) message obtains each management information bank (ManagementInformationBase respectively, MIB) mac address information in node and power supply state information, it is thus achieved that the power supply state that MAC Address that all of the port of this PoE equipment is corresponding is corresponding with all of the port。
When implementing, AC configures MIB read and write access authority, and AC sends SNMP message to this PoE equipment and obtains the information of MIB node dot1dTpFdbAddress, obtains the MAC Address that PoE equipment all of the port is corresponding。This AC sends SNMP message to this PoE equipment and obtains the information of MIB node pethPsePortDetectionStatus, obtains the power supply state of all of the port。
Step 202, a corresponding MAC Address and the port powered and the AP accessing described AC are bound by this AC according to MAC Address, binding records the corresponding relation of the AP that the mark of the IP address AP corresponding with described port of the port numbers of described port, described port place PoE equipment is powered with this PoE equipment with the port setting up PoE equipment, and the MAC Address that the MAC Address of the AP that described port is corresponding is corresponding with this port is identical。
When implementing, AC checks mark and the MAC Address of the AP accessing this AC, and in the embodiment of the present application, the AP accessing AC is this AC AP being in run state that can view。The corresponding relation of the AP that the port of the PoE equipment that this AC self connects and this PoE equipment are powered is set up according to MAC Address, it is specially, when the MAC Address that the MAC Address of AP corresponding to port is corresponding with this port is identical, by this port and the AP binding accessing described AC。
When the corresponding relation of the AP that all of the port being established this AC self PoE equipment connected by step 201 and step 202 is powered with this PoE equipment, afterwards, when this AC controls arbitrary AP for power-off, specifically process as follows:
This AC according to the mark of this AP, searches IP address and the port numbers of PoE equipment corresponding for this AP, indicates this PoE equipment to be powered or power-off by port corresponding for the port numbers found in local record。
When implementing, the IP address of PoE equipment that this AC can pass through to find sends SNMP to described PoE equipment and arranges (set) message, it is intended that port corresponding to the port numbers that finds is powered or power-off。
When controlling this AP and powering, if in Preset Time, this AP is not actuated, then delete the corresponding relation between this AP and described PoE device port。Wherein, Preset Time, it is possible to configure according to practical application。
When implementing, in order to control the confession power-off of each AP accurately and in time, this AC also opens up detection function, has detected whether that new AP reaches the standard grade。
When this AC detects that new AP reaches the standard grade, determine whether there is the record that the port of the AP newly reached the standard grade with this PoE equipment being connected is corresponding, if it does, delete former record, binding records the IP address of the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment；If it does not, be directly bound the IP address recording the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment。
Below in conjunction with accompanying drawing, lift specific embodiment, describe how the application realizes AC control AP for power-off in detail。
It is WLAN schematic diagram in the embodiment of the present application referring to Fig. 3, Fig. 3。In Fig. 3, focus AP1 to AP5 is joined in same focus group by AC, one PoE pond of this focus group binding, comprises the IP address of two PoE equipment in this PoE pond, and wherein, the IP address that IP address is 172.1.0.1, PoE equipment 2 of PoE equipment 1 is 172.1.0.2。
AC needs the corresponding relation of the study port to PoE equipment 1 and PoE equipment 2 and the online AP in this locality, for the port and the corresponding relation of the online AP in this locality that learn PoE equipment 1, is described in detail。
AC sends SNMP message to PoE equipment 1 and obtains the information of MIB node dot1dTpFdbAddress, obtains the MAC Address that all of the port of PoE equipment 1 is corresponding。Referring to table 1, the content that table 1 comprises for the mac address information that all of the port of AC acquisition PoE equipment 1 is corresponding。
| The IP address of PoE equipment | Port numbers | MAC Address |
| 172.1.0.1 | E1/0/1 | 0023-4567-5432 |
| 172.1.0.1 | E1/0/2 | 0023-4567-2453 |
| 172.1.0.1 | E1/0/3 | 0023-4567-2561 |
| 172.1.0.1 | E1/0/4 | 0023-4567-2256 |
| 172.1.0.1 | E1/0/4 | 0001-F010-D123 |
| 172.1.0.1 | E1/0/4 | 0002-E210-F912 |
Table 1
In table 1, filter out port and MAC Address list item one to one。If not one_to_one corresponding, such as port E1/0/4, illustrate under this port it must is accessed a network rather than an equipment。Therefore, list item information corresponding for port E1/0/4 can be got rid of。
AC sends SNMP message to PoE equipment 1 and obtains the information of MIB node pethPsePortDetectionStatus, obtains the power supply state of all of the port。Referring to table 2, table 2 obtains the information that the power supply state of each port of PoE equipment 1 comprises for AC。
| The IP address of PoE equipment | Port numbers | The power supply state of port |
| 172.1.0.1 | E1/0/1 | Not in power supply |
| 172.1.0.1 | E1/0/2 | Power |
| 172.1.0.1 | E1/0/3 | Power |
| 172.1.0.1 | E1/0/4 | Not in power supply |
Table 2
In table 2, need to be that the list item information that the port do not powered is corresponding is deleted by power supply state, get rid of by list item information corresponding with port E1/0/4 for port E1/0/1。
By table 1 middle port and MAC Address list item one to one, take common factor with the list item that table 2 middle port is power supply state, namely obtain a corresponding MAC Address, and power supply state is the list item information that the port powered is corresponding。Referring to table 3, it is the content that the list item information that the port powered is corresponding comprises that table 3 obtains a corresponding MAC Address and power supply state on PoE equipment 1 for AC。
| The IP address of PoE equipment | Port numbers | MAC Address | Power supply state |
| 172.1.0.1 | E1/0/2 | 0023-4567-2453 | Power |
| 172.1.0.1 | E1/0/3 | 0023-4567-2561 | Power |
Table 3
AC checks the local AP accessing this AC, referring to table 4。Table 4 is the local content corresponding for AP accessing this AC。
| The mark of AP | MAC Address |
| 1 | 0023-8AEB-9141 |
| 2 | 0023-4567-2453 |
| 3 | 0023-4410-5A51 |
Table 4
AC obtains a corresponding MAC Address and the method that power supply state is the AP that the port powered is corresponding, it is possible to be the common factor taking table 3 and table 4, the contents in table that namely table 3 is corresponding with identical MAC Address in table 4。Referring to table 5, the content that table 5 comprises for the AC supply port of PoE equipment 1 obtained and the mapping table of AP。
| The IP address of PoE equipment | Port numbers | Power supply state | The mark of AP |
| 172.1.0.1 | E1/0/2 | Power | 2 |
Table 5
Table 5 is the mapping table that the PoE equipment 1 that in PoE pond, IP address is corresponding for 172.1.0.1 is correlated with。Also need to the mapping table using method same as mentioned above to obtain supply port that IP address in this PoE pond is PoE equipment 2 corresponding for 172.1.0.2 and AP。
Referring to table 6, table 6 is the content that the supply port of PoE equipment and the mapping table of AP comprise that is connected with AC。
| The IP address of PoE equipment | Port numbers | MAC Address | Power supply state | The mark of AP |
| 172.1.0.1 | E1/0/2 | 0023-4567-2453 | Power | 2 |
| 172.1.0.2 | E2/0/1 | 0023-8AEB-9141 | Power | 4 |
| 172.1.0.2 | E2/0/2 | 0023-4410-5A51 | Power | 5 |
Table 6
When AC needs to AP2 power-off, first look at the mark 2 whether comprising AP2 in table 6, if comprised, obtain IP address and the port numbers of the PoE equipment of correspondence, the IP address of the PoE equipment obtained in table 6 is 172.1.0.1, port numbers is E1/0/2, sends SNMPset message to the PoE equipment 1 that IP address is 172.1.0.1, it is intended that port numbers is the port power-off of E1/0/2, now AP is de-energized, and is in time-out power supply state。And power supply state corresponding for AP1 in table 6 is revised as time-out power supply。
Referring to table 7, table 7 is that the AP2 that PoE equipment connects for 1 time suspends the content that when powering, on AC, the supply port of PoE equipment and the mapping table of AP comprise。
| The IP address of PoE equipment | Port numbers | Power supply state | The mark of AP |
| 172.1.0.1 | E1/0/2 | Suspend power supply | 2 |
| 172.1.0.2 | E2/0/1 | Power | 4 |
| 172.1.0.2 | E2/0/2 | Power | 5 |
Table 7
When AC needs to power to AP2, check IP address and the port numbers of the PoE equipment of mark 2 correspondences of AP2 equally, then send SNMPset message, it is intended that the port that port numbers is E1/0/2 is powered。
In Preset Time, if now AP2 starts, it is in just at power supply state。It is set to power by power supply state corresponding for AP2。The content that mapping table after arranging comprises is in Table 6。
Preset Time then, if this AP2 is not actuated, deletes the corresponding relation between AP2 and described PoE device port in table 7。
When AC detects that new AP reaches the standard grade, such as AP10, and the port numbers of the port of AP10 PoE equipment 1 being connected of newly reaching the standard grade with this is E1/0/2, local current record searches whether there is the record that port numbers is E1/0/2, assume, the current content being recorded as in table 7, it is determined that there is port numbers is corresponding for E1/0/2 record。Deleting port numbers is corresponding for E1/0/2 record, and binds the IP address recording the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment, is specially 10, E1/0/2,172.1.0.1, records the power supply state of this AP for power simultaneously。
If newly reaching the standard grade with this, the port numbers of the port of the AP10 PoE equipment 1 being connected is E1/0/11, then binding records the IP address of the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment, particularly as follows: 10, E1/0/11,172.1.0.1, record the power supply state of this AP for power simultaneously。
Based on same application design in the application specific embodiment, it is also proposed that a kind of AC。Referring to the structural representation that Fig. 4, Fig. 4 are the equipment being applied to above-mentioned technology in the application specific embodiment。This equipment includes: processing unit 401。
Processing unit 401, for powering or during power-off when controlling AP, the corresponding relation according to the AP that the port of this AC PoE equipment connected and this PoE equipment are powered, indicate this PoE equipment to be powered or power-off by corresponding port。
It is preferred that this equipment farther includes: acquiring unit 402 and record unit 403。
Acquiring unit 402, for obtaining MAC address corresponding to this AC all of the port of PoE equipment connected and power supply state corresponding to port；And determine a corresponding MAC Address and the port powered。
Record unit 403, bind with the AP accessing described AC for one MAC Address of correspondence acquiring unit 402 determined according to MAC Address and the port powered, binding records the mark of the IP address AP corresponding with described port of the port numbers of described port, described port place PoE equipment, the corresponding relation of the AP that the port to set up PoE equipment is powered with this PoE equipment, the MAC Address that the MAC Address of the AP that described port is corresponding is corresponding with this port is identical。
Processing unit 401, searches IP address and the port numbers of PoE equipment corresponding for this AP in record unit 403, indicates this PoE equipment to be powered or power-off by port corresponding for the port numbers found for the mark according to this AP。
It is preferred that this equipment farther includes: dispensing unit 404。
Dispensing unit 404, is further used for configuration Preset Time。
Record unit 403, is further used for when processing unit 401 is powered to AP, if in the Preset Time of dispensing unit 404 configuration, this AP is not actuated, deletes the corresponding relation between this AP and described PoE device port。
It is preferred that this equipment farther includes: detect unit 405 and determine unit 406。
Detection unit 405, for detecting whether there is new AP to reach the standard grade。
Determine unit 406, for when detecting unit 405 and detecting that new AP reaches the standard grade, it is determined whether there is the record that the port of the AP newly reached the standard grade with this PoE equipment being connected is corresponding。
Record unit 403, it is further used for when determining that unit 406 determines the record that the port that there is the AP newly reached the standard grade with this PoE equipment being connected is corresponding, deleting former record, binding records the IP address of the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment；When determining that unit 406 determines the record that the port being absent from the AP that newly reaches the standard grade with this PoE equipment being connected is corresponding, binding records the IP address of the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment。
It is preferred that
Acquiring unit 402, is used for obtaining the mac address information in management information bank MIB node and power supply state information from described PoE equipment, it is determined that a corresponding MAC Address and the port powered。
The unit of above-described embodiment can be integrated in one, it is also possible to separates and disposes；A unit can be merged into, it is also possible to be further split into multiple subelement。
In sum, in the application specific embodiment, the AC in WLAN obtains the port of PoE equipment and the corresponding relation of the AP that powered by PoE equipment automatically, when needing to arbitrary AP power-off, by specifying port power-off corresponding for this AP on PoE equipment, reach to the purpose of this AP power-off, reduce network operation cost, and reliability is high。
The above, be only the preferred embodiment of the application, is not intended to limit the protection domain of the application。All within spirit herein and principle, any amendment of making, equivalent replacement, improvement etc., should be included within the protection domain of the application。
Claims (8)
1. one kind controls the access point AP method for power-off, it is characterised in that including:
Power or during power-off when access controller AC controls AP, the corresponding relation according to the AP that the port of this AC self POE PoE equipment connected is powered with this PoE equipment, indicate this PoE equipment to be powered or power-off by corresponding port；
Wherein, described AC control AP powers or farther includes before power-off:
Described AC obtains MAC address corresponding to all of the port of PoE equipment self connected and power supply state corresponding to port；Determine a corresponding MAC Address and the port powered；
A corresponding MAC Address and the port powered and the AP accessing described AC are bound by described AC according to MAC Address, binding records the mark of the Internet protocol IP address AP corresponding with described port of the port numbers of described port, described port place PoE equipment, the corresponding relation of the AP that the port to set up PoE equipment is powered with this PoE equipment, the MAC Address that the MAC Address of the AP that described port is corresponding is corresponding with this port is identical；
The corresponding relation of the described AP powered with this PoE equipment according to the port of this AC self PoE equipment connected, indicates this PoE equipment to be powered or power-off by corresponding port, including:
The IP address of PoE equipment corresponding for this AP of the identifier lookup according to this AP and port numbers, indicate this PoE equipment to be powered or power-off by port corresponding for the port numbers found。
2. method according to claim 1, it is characterised in that when port corresponding for the port numbers found is powered by this PoE equipment of described instruction, described method farther includes:
If in Preset Time, this AP is not actuated, deletes the corresponding relation between this AP and described PoE device port。
3. method according to claim 1 and 2, it is characterised in that described method farther includes:
When described AC detects that new AP reaches the standard grade, determine whether there is the record that the port of the AP newly reached the standard grade with this PoE equipment being connected is corresponding, if it does, delete former record, binding records the IP address of the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment；If it does not, binding records the IP address of the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment。
4. method according to claim 1 and 2, it is characterised in that described AC obtains MAC Address corresponding to all of the port of PoE equipment self connected and power supply state corresponding to port；Determine a corresponding MAC Address and the port powered, including:
Described AC obtains the mac address information in management information bank MIB node and power supply state information from described PoE equipment, it is determined that a corresponding MAC Address and the port powered。
5. an access controller AC, it is characterised in that this AC includes: processing unit；
Described processing unit, for powering or during power-off when controlling access point AP, the corresponding relation according to the AP that the port of this AC POE PoE equipment connected and this PoE equipment are powered, indicate this PoE equipment to be powered or power-off by corresponding port；
Wherein, described AC farther includes: acquiring unit and record unit；
Described acquiring unit, for obtaining MAC address corresponding to this AC all of the port of PoE equipment connected and power supply state corresponding to port；And determine a corresponding MAC Address and the port powered；
Described record unit, bind with the AP accessing described AC for one MAC Address of correspondence described acquiring unit determined according to MAC Address and the port powered, binding records the mark of the Internet protocol IP address AP corresponding with described port of the port numbers of described port, described port place PoE equipment, the corresponding relation of the AP that the port to set up PoE equipment is powered with this PoE equipment, the MAC Address that the MAC Address of the AP that described port is corresponding is corresponding with this port is identical；
Described processing unit, specifically for powering or during power-off when controlling AP, searches IP address and the port numbers of PoE equipment corresponding for this AP in described record unit, indicates this PoE equipment to be powered or power-off by port corresponding for the port numbers found according to the mark of this AP。
6. access controller AC according to claim 5, it is characterised in that described equipment farther includes: dispensing unit；
Described dispensing unit, is further used for configuration Preset Time；
Described record unit, is further used for when described processing unit control AP powers, if in the Preset Time of described dispensing unit configuration, this AP is not actuated, deletes the corresponding relation between this AP and described PoE device port。
7. the access controller AC according to claim 5 or 6, it is characterised in that described equipment farther includes: detect unit and determine unit；
Described detection unit, for detecting whether there is new AP to reach the standard grade；
Described determine unit, for when described detection unit detects that new AP reaches the standard grade, it is determined whether there is the record that the port of the AP newly reached the standard grade with this PoE equipment being connected is corresponding；
Described record unit, it is further used for described determining that unit determines the record that the port that there is the AP newly reached the standard grade with this PoE equipment being connected is corresponding, deleting former record, binding records the IP address of the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment；Determining that unit determines the record that the port being absent from the AP that newly reaches the standard grade with this PoE equipment being connected is corresponding when described, binding records the IP address of the mark of this AP newly reached the standard grade, the port numbers of corresponding ports and PoE equipment。
8. the access controller AC according to claim 5 or 6, it is characterised in that
Described acquiring unit, is used for obtaining the mac address information in management information bank MIB node and power supply state information from described PoE equipment, it is determined that a corresponding MAC Address and the port powered。
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| CN105450422A (en) * | 2015-12-02 | 2016-03-30 | 杭州敦崇科技股份有限公司 | Wireless access point fault remote automatic recovery system based on access controller and POE switch |
| CN106789115A (en) * | 2017-03-27 | 2017-05-31 | 上海市共进通信技术有限公司 | POE intelligent switch and its control method |
| CN109151798A (en) * | 2018-08-29 | 2019-01-04 | 迈普通信技术股份有限公司 | Power control system and method |
| CN109660365A (en) * | 2019-02-26 | 2019-04-19 | 新华三技术有限公司 | A kind of method for controlling power supply and device |
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| CN101541068B (en) * | 2009-05-12 | 2011-01-05 | 杭州华三通信技术有限公司 | WLAN network control method and device thereof |
| CN103068019B (en) * | 2013-01-08 | 2015-12-09 | 杭州华三通信技术有限公司 | A kind of method that WLAN is energy-conservation and device |
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