CN103118387A - Lightweight access point (AP) redundancy access control method of active standby mode - Google Patents
Lightweight access point (AP) redundancy access control method of active standby mode Download PDFInfo
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- CN103118387A CN103118387A CN2012105502378A CN201210550237A CN103118387A CN 103118387 A CN103118387 A CN 103118387A CN 2012105502378 A CN2012105502378 A CN 2012105502378A CN 201210550237 A CN201210550237 A CN 201210550237A CN 103118387 A CN103118387 A CN 103118387A
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Abstract
The invention relates to a lightweight access point (AP) redundancy access control method of an active standby mode. The method is applied to a wireless network inside an enterprise. The wireless network comprises an AC and two lightweight APs which are connected with the AC, one AP in the method is used as a main AP, a radio frequency signal is transmitted, the other AP is used as an auxiliary AP and in electricity-saving dormant state, the radio-frequency signal is not transmitted, and the auxiliary AP cyclically detects working condition information of the main AP. If the working state of the main AP working is normal, the auxiliary AP continues to be in an electricity-saving dormant state; if the working state of the main AP is not normal, the auxiliary AP is activated and replaces the main AP to transmit the radio-frequency signal until the working state of the main AP is detected to be recovered to be normal. Compared with the prior art, the lightweight AP redundancy access control method of the active standby mode can keep same received signal strength indication, radio-frequency coverage and data rate at any time. When the main AP and the auxiliary AP are switched, network access continuity of quality of service (QoS), signal strength and the like can be ensured.
Description
Technical field
The present invention relates to wireless communication field, especially relate to a kind of thin AP redundancy connection control method that adopts active-standby mode.
Background technology
More and more welcome in enterprise based on the WLAN of thin AP (centralized WAP (wireless access point)) at present.In important places such as meeting room, operating room and Live Audio chambers, the wireless connections between equipment and AP need to guarantee not disconnect.But AP may can not provide normal service because of outage, netting twine disconnection or hardware damage.So it is very important that the hand AP scheme of a redundancy is provided.If an AP has cast anchor, another AP still can provide same QoS Wi-Fi signal to cover, and this is the demand of an important service reliability.
The problem that exists in present solution has, signal strength signal intensity, antenna cover, message transmission rate etc. can not with the rank that remains in the past, and be difficult to safeguard aspect service quality, this is very disadvantageous for wireless network, is not the voice and video application facet very high to qos requirement.
Summary of the invention
Purpose of the present invention is exactly that a kind of thin AP redundancy connection control method of active-standby mode is provided for the defective that overcomes above-mentioned prior art existence, the method can keep same received signal strength indicator, radio frequency covering, data rate at any time, and active and standby AP is when switching, and the network insertion continuity of QoS and signal strength signal intensity etc. can be protected.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of thin AP redundancy connection control method of active-standby mode, the method is applied to the wireless network of enterprises, two thin AP that this wireless network comprises AC (access controller) and is connected with this AC, in the method with an AP as main AP, emitting radio frequency signal, with another AP as standby AP, be in the economize on electricity resting state, emitting radio frequency signal not, standby AP periodically detects the work state information of main AP, if main AP operating state is normal, standby AP keeps the economize on electricity resting state; If main AP working state abnormal, standby AP activates, and replaces main AP emitting radio frequency signal, recovers normal until the master detects main AP operating state.
Standby AP periodically detects the work state information of main AP, and this work state information is included in presence information and radio frequency state information, if having in presence information and radio frequency state information one undesired, judge the working state abnormal of main AP.
Described radio frequency state information comprises the emission of radio frequency signals state of IEEE802.11a/b/g pattern.
Standby AP periodically detects the presence information of main AP by the mode of heartbeat detection.
Standby AP realizes activating by two timers, described two timers are the heartbeat message timer and wake timer up, described heartbeat message timer is used for keeping the time interval that standby AP equipment sends heartbeat message, the described timer that wakes up is for the activationary time interval of keeping standby AP equipment, after surpassing the activationary time interval, standby AP does not also receive the feedback message of heartbeat message, and standby AP activates.
The concrete steps of the method comprise:
1) standby AP when reaching the time interval of a heartbeat message timer, sends heartbeat message to main AP;
2) standby AP judges whether to receive the feedback information of main AP, if receive feedback information, judge that main AP is online, execution in step 3), if after surpassing the activationary time interval, be not received in feedback information, judge that main AP is not online, standby AP activates, and replaces main AP emitting radio frequency signal, recovers normal until the master detects main AP operating state;
3) standby AP is to the radio frequency state information of the main AP of AC inquiry, if this radio frequency state information is normal, standby AP continues to keep the economize on electricity resting state; If the radio frequency state information is undesired, standby AP activates, and replaces main AP emitting radio frequency signal, recovers normal until the master detects main AP operating state.
Compared with prior art, the present invention has the following advantages:
1, the method by active-standby mode, provides more reliable wireless network access service.
2, the method can keep same received signal strength indicator, radio frequency covering, data rate etc. in the course of the work.
3, the method is when active and standby AP switches, can guaranteed qos, the network insertion continuity such as signal strength signal intensity.
Description of drawings
Fig. 1 is topology diagram of the present invention;
Fig. 2 enters the flow chart of standby AP state when being AP access of the present invention;
Fig. 3 is that the standby AP of the present invention enters the flow chart of state of activation.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
as shown in Figure 1, a kind of thin AP redundancy connection control method of active-standby mode, the method is applied to the wireless network (Intranet) of enterprises, the topological structure of this wireless network as shown in Figure 1, two thin AP that comprise AC and be connected with this AC, the method with an AP as main AP (Master AP), emitting radio frequency signal, the Wi-Fi access is provided, with another AP as standby AP (StandbyAP), be at ordinary times the economize on electricity resting state, close the radio frequency letter emission number of IEEE802.11a/b/g pattern, when main AP fault, replace main AP emitting radio frequency signal, the Wi-Fi access is provided.
Standby AP by with the mutual heartbeat message of main AP, detect the presence information that it periodically detects main AP, standby AP sends heartbeat message Keep_Alive to main AP, and main AP replys a feedback information Keep_Alive_ACK to standby AP after receiving Keep_Alive.If standby AP receives this Keep_Alive_ACK, represent that main AP is in normal presence, be not in close, not presence that hardware damage or network link failure etc. cause.
Standby AP realizes activating by two timers, described two timers are the heartbeat message timer and wake timer up, described heartbeat message timer is used for keeping the time interval that standby AP equipment sends heartbeat message, the described timer that wakes up is for the activationary time interval of keeping standby AP equipment, after surpassing the activationary time interval, standby AP does not also receive the feedback message of heartbeat message, and standby AP activates.
The concrete steps of the method are as follows:
1) standby AP when reaching the time interval of a heartbeat message timer, sends heartbeat message to main AP;
2) standby AP judges whether to receive the feedback information of main AP, if receive feedback information, judge that main AP is online, execution in step 3), if after surpassing the activationary time interval, be not received in feedback information, judge that main AP is not online, standby AP activates, and replaces main AP emitting radio frequency signal, recovers normal until the master detects main AP operating state;
3) standby AP is to the radio frequency state information of the main AP of AC inquiry, if this radio frequency state information is normal, standby AP continues to keep the economize on electricity resting state; If the radio frequency state information is undesired, standby AP activates, and replaces main AP emitting radio frequency signal, recovers normal until the master detects main AP operating state.
In the specific implementation, enter the process of standby AP state during the AP access as shown in Figure 2, when AP is connected to AC, determine whether standby AP, if so, read the IP address of main AP from AC, then send heartbeat message Keep_Alive to main AP, if received the feedback information Keep_Alive_ACK that main AP replys, can judge that the presence of main AP is normal; The AP of access can send the solicited message Radio_Status of radio frequency status poll to AC simultaneously, and receive the feedback information Radio_Status_ACK that AC replys, the radio frequency state information that comprises the IEEE802.11a/b/g isotype of main AP in this feedback information, if the radio frequency state of main AP is normal, the AP of access as standby AP, is in the economize on electricity resting state.
If the working state abnormal of main AP, standby AP enter state of activation flow process as shown in Figure 3, when standby AP is in the economize on electricity resting state, send heartbeat message Keep_Alive to main AP, if do not receive the feedback information Keep_Alive_ACK that main AP replys, activate standby AP, make it become main AP and carry out work, until original main AP replys normal operating conditions; If the feedback information Keep_Alive_ACK that receives that main AP replys is arranged, continue to keep the economize on electricity resting state, whether the radio frequency state that detects main AP by AC is normal.
Claims (6)
1. the thin AP redundancy connection control method of an active-standby mode, the method is applied to the wireless network of enterprises, and two thin AP that this wireless network comprises AC and is connected with this AC is characterized in that, in the method with an AP as main AP, emitting radio frequency signal as standby AP, is in the economize on electricity resting state with another AP, emitting radio frequency signal not, standby AP periodically detects the work state information of main AP, if main AP operating state is normal, standby AP keeps the economize on electricity resting state; If main AP working state abnormal, standby AP activates, and replaces main AP emitting radio frequency signal, recovers normal until the master detects main AP operating state.
2. the thin AP redundancy connection control method of a kind of active-standby mode according to claim 1, it is characterized in that, standby AP periodically detects the work state information of main AP, this work state information is included in presence information and radio frequency state information, if have in presence information and radio frequency state information one undesired, judge the working state abnormal of main AP.
3. the thin AP redundancy connection control method of a kind of active-standby mode according to claim 2, is characterized in that, described radio frequency state information comprises the emission of radio frequency signals state of IEEE802.11a/b/g pattern.
4. the thin AP redundancy connection control method of a kind of active-standby mode according to claim 2, is characterized in that, standby AP periodically detects the presence information of main AP by the mode of heartbeat detection.
5. the thin AP redundancy connection control method of a kind of active-standby mode according to claim 4, it is characterized in that, standby AP realizes activating by two timers, described two timers are the heartbeat message timer and wake timer up, described heartbeat message timer is used for keeping the time interval that standby AP equipment sends heartbeat message, the described timer that wakes up is for the activationary time interval of keeping standby AP equipment, after surpassing the activationary time interval, standby AP does not also receive the feedback message of heartbeat message, and standby AP activates.
6. the thin AP redundancy connection control method of a kind of active-standby mode according to claim 5, is characterized in that, the concrete steps of the method comprise:
1) standby AP when reaching the time interval of a heartbeat message timer, sends heartbeat message to main AP;
2) standby AP judges whether to receive the feedback information of main AP, if receive feedback information, judge that main AP is online, execution in step 3), if after surpassing the activationary time interval, be not received in feedback information, judge that main AP is not online, standby AP activates, and replaces main AP emitting radio frequency signal, recovers normal until the master detects main AP operating state;
3) standby AP is to the radio frequency state information of the main AP of AC inquiry, if this radio frequency state information is normal, standby AP continues to keep the economize on electricity resting state; If the radio frequency state information is undesired, standby AP activates, and replaces main AP emitting radio frequency signal, recovers normal until the master detects main AP operating state.
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| CN104375820A (en) * | 2013-08-15 | 2015-02-25 | 恩智浦有限公司 | Event-driven processor and operating method thereof |
| CN104869582A (en) * | 2015-04-28 | 2015-08-26 | 福建星网锐捷网络有限公司 | Wireless network backup method and system |
| CN106789246A (en) * | 2016-12-22 | 2017-05-31 | 广西防城港核电有限公司 | The changing method and device of a kind of active/standby server |
| CN107124731A (en) * | 2017-05-05 | 2017-09-01 | 杭州迪普科技股份有限公司 | A kind of method and system of WAP backup |
| CN108413922A (en) * | 2018-05-10 | 2018-08-17 | 新疆维吾尔自治区地震局 | A kind of fast detector for Borehole strain observation instrument |
| CN108833425A (en) * | 2018-06-26 | 2018-11-16 | 九江职业技术学院 | A kind of network safety system and method based on big data |
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| CN108833425A (en) * | 2018-06-26 | 2018-11-16 | 九江职业技术学院 | A kind of network safety system and method based on big data |
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