CN103118387B

CN103118387B - A kind of thin AP redundancy connection control method of active-standby mode

Info

Publication number: CN103118387B
Application number: CN201210550237.8A
Authority: CN
Inventors: 李玮; 唐广昌
Original assignee: Shanghai Huanchuang Communication Technology Co Ltd
Current assignee: Shanghai Huanchuang Communication Technology Co Ltd
Priority date: 2012-12-17
Filing date: 2012-12-17
Publication date: 2019-02-22
Anticipated expiration: 2032-12-17
Also published as: CN103118387A

Abstract

The present invention relates to a kind of thin AP redundancy connection control methods of active-standby mode, this method is applied to the wireless network of enterprises, the wireless network includes AC and two thin AP connecting with the AC, using an AP as main AP in this method, emits radiofrequency signal, using another AP as standby AP, in power saving sleep state, do not emit radiofrequency signal, standby AP periodically detects the work state information of main AP, if main AP working condition is normal, power saving sleep state is kept for AP；If main AP working state abnormal, for AP activation, emit radiofrequency signal instead of main AP, until main detect that main AP working condition restores normal.Compared with prior art, the present invention can maintain same received signal strength indicator, radio frequency covering, data rate at any time, and active and standby AP is in switching, the available guarantee of network insertion continuity of QoS and signal strength etc..

Description

A kind of thin AP redundancy connection control method of active-standby mode

Technical field

The present invention relates to wireless communication fields, access controlling party more particularly, to a kind of thin AP redundancy using active-standby mode Method.

Background technique

It is becoming increasingly popular in enterprise currently based on the WLAN of thin AP (centralized wireless access point).In meeting room, hand The important place such as art room and Live Audio room, the wireless connection between equipment and AP need to guarantee not turning off.But AP may Normal service cannot be provided because of power-off, cable disconnection or hardware damage.So providing the hand AP scheme of a redundancy It is very important.If an AP casts anchor, another AP still can provide same QoS Wi-Fi signal covering, this It is the demand of an important service reliability.

The problem of current solution, has, signal strength, antenna covering, message transmission rate etc. cannot with Past is maintained at a rank, and is difficult to safeguard in terms of service quality, this be for wireless network it is very unfavorable, be not To the very high voice and video application aspect of qos requirement.

Summary of the invention

It is thin it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of active-standby mode AP redundancy connection control method, this method can maintain same received signal strength indicator, radio frequency covering, data speed at any time Rate, and active and standby AP is in switching, the available guarantee of network insertion continuity of QoS and signal strength etc..

The 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, this method are applied to the wireless network of enterprises, should Wireless network includes AC (access controller) and two thin AP connecting with the AC, using an AP as main AP in this method, Emit radiofrequency signal, using another AP as standby AP, be in power saving sleep state, do not emit radiofrequency signal, standby AP is periodically The work state information of main AP is detected, if main AP working condition is normal, keeps power saving sleep state for AP；If main AP work It is abnormal to make state, then for AP activation, emits radiofrequency signal instead of main AP, until main detect that main AP working condition is restored just Often.

Standby AP periodically detects the work state information of main AP, which includes presence information and penetrate Frequency status information, if having in presence information and radio frequency status information one it is abnormal, determine the working condition of main AP not Normally.

The radio frequency status information includes the emission of radio frequency signals state of IEEE802.11a/b/g mode.

Standby AP periodically detects the presence information of main AP by way of heartbeat detection.

Standby AP realizes activation by two timers, and two timers is heartbeat message timers and wake up timing Device, the time interval that the heartbeat message timer is used to that standby AP equipment to be maintained to issue heartbeat message, the wake-up timing Device is used to maintain the activationary time interval of standby AP equipment, and after being more than activationary time interval, standby AP does not receive heartbeat message also Feedback message, then for AP activation.

The specific steps of this method include:

1) standby AP sends heartbeat message to main AP when reaching the time interval of a heartbeat message timer；

2) standby AP judges whether to receive the feedback information of main AP, if receiving feedback information, determines that main AP is online, then Step 3) is executed, if then determining that main AP is not online, then for AP more than behind activationary time interval, not receiving to feedback information Activation replaces main AP transmitting radiofrequency signal, until main detect that main AP working condition restores normal；

3) the radio frequency status information that standby AP inquires main AP to AC continues to keep if the radio frequency status information is normal for AP Power saving sleep state；If radio frequency status information is abnormal, for AP activation, replace main AP transmitting radiofrequency signal, until main detection Restore normal to main AP working condition.

Compared with prior art, the invention has the following advantages that

1, this method provides more reliable wireless network access services by active-standby mode.

2, this method can maintain like during the work time received signal strength indicator, radio frequency covering, data rate Deng.

3, this method is when active and standby AP switches, it is ensured that the network insertions continuity such as QoS, signal strength.

Detailed description of the invention

Fig. 1 is topology diagram of the invention；

Fig. 2 is when AP of the present invention is accessed into the flow chart of standby AP state；

Fig. 3 is the flow chart that the standby AP of the present invention enters state of activation.

Specific embodiment

The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.

Embodiment

As shown in Figure 1, a kind of thin AP redundancy connection control method of active-standby mode, this method is applied to the nothing of enterprises Gauze network (Intranet), the topological structure of the wireless network is as shown in Figure 1, include that AC and connect with the AC two are thin AP, this method emit radiofrequency signal using an AP as main AP (Master AP), provide Wi-Fi access, with another AP work For standby AP (Standby AP), it is usually in power saving sleep state, the radio frequency for closing IEEE802.11a/b/g mode believes transmitting Number, in main AP failure, emit radiofrequency signal instead of main AP, Wi-Fi access is provided.

Standby AP is standby to detect its presence information for periodically detecting main AP by interacting heartbeat message with main AP AP sends heartbeat message Keep_Alive to main AP, and main AP replys a feedback information to standby AP after receiving Keep_Alive Keep_Alive_ACK.If standby AP receives this Keep_Alive_ACK, then it represents that main AP is in normal presence, does not have Have in close, not presence caused by hardware damage or network link failure etc..

Specific step is as follows for this method:

In the specific implementation, process when AP is accessed into standby AP state judges as shown in Fig. 2, when AP is connected to AC Whether it is standby AP, if it is, reading the IP address of main AP from AC, then sends heartbeat message Keep_Alive to main AP, such as Fruit has received the feedback information Keep_Alive_ACK that main AP is replied, it is possible to determine that the presence of main AP is normal；It connects simultaneously The AP entered can send the solicited message Radio_Status of radio frequency status inquiry to AC, and receive the feedback information of AC reply Radio_Status_ACK, the radio frequency status information of the IEEE802.11a/b/g isotype in the feedback information comprising main AP, such as The radio frequency state of the main AP of fruit is normal, then the AP accessed is used as standby AP, is in power saving sleep state.

If the working state abnormal of main AP, enter the process of state of activation for AP as shown in figure 3, standby AP is in economize on electricity When dormant state, heartbeat message Keep_Alive is sent to main AP, if not receiving the feedback information Keep_ that main AP is replied Alive_ACK then activates standby AP, becomes main AP and work, until original main AP working condition back to normal；If Have and receive the feedback information Keep_Alive_ACK that main AP is replied, then continues to keep power saving sleep state, main AP is detected by AC Radio frequency state it is whether normal.

Claims

1. a kind of thin AP redundancy connection control method of active-standby mode, this method is applied to the wireless network of enterprises, the nothing Gauze network includes AC and two thin AP connecting with the AC, which is characterized in that using an AP as main AP in this method, transmitting Radiofrequency signal is in power saving sleep state, does not emit radiofrequency signal using another AP as standby AP, and standby AP is periodically detected The work state information of main AP keeps power saving sleep state if main AP working condition is normal for AP；The shape if main AP works State is abnormal, then for AP activation, emits radiofrequency signal instead of main AP, until main detect that main AP working condition restores normal；

Standby AP periodically detects the work state information of main AP, which includes presence information and radio frequency shape State information, if having in presence information and radio frequency status information one it is abnormal, determine the working state abnormal of main AP, The radio frequency status information includes the emission of radio frequency signals state of IEEE802.11a/b/g mode, and standby AP passes through heartbeat detection Mode periodically detect the presence information of main AP, standby AP realizes activation by two timers, and described two are fixed When device is heartbeat message timer and wakes up timer, the heartbeat message timer is for maintaining standby AP equipment to issue heartbeat The time interval of message, the wake-up timer is used to maintain the activationary time interval of standby AP equipment, when more than activationary time Behind interval, standby AP does not receive the feedback message of heartbeat message also, then for AP activation；

The specific steps of this method include:

2) standby AP judges whether to receive the feedback information of main AP, if receiving feedback information, determines that main AP is online, then executes Step 3), if then determining that main AP is not online more than behind activationary time interval, not receiving to feedback information, then being activated for AP, Replace main AP transmitting radiofrequency signal, until main detect that main AP working condition restores normal；

3) standby AP inquires the radio frequency status information of main AP to AC, if the radio frequency status information is normal, continues to keep economize on electricity for AP Dormant state；If radio frequency status information is abnormal, for AP activation, replace main AP transmitting radiofrequency signal, until master detects master AP working condition restores normal.