CN101951616B - Switching method, system and device for wireless controller - Google Patents
Switching method, system and device for wireless controller Download PDFInfo
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- CN101951616B CN101951616B CN 201010226059 CN201010226059A CN101951616B CN 101951616 B CN101951616 B CN 101951616B CN 201010226059 CN201010226059 CN 201010226059 CN 201010226059 A CN201010226059 A CN 201010226059A CN 101951616 B CN101951616 B CN 101951616B
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Abstract
The invention provides switching method, system and device for a wireless controller. The switching method comprises the steps of: respectively establishing a main link channel of a main AC device and a backup link channel of a backup AC device; transmitting configuration information sent by the main AC device and state information to be uploaded to the main AC device to the backup AC device in real time for backup through the backup link channel; detecting whether the main link channel is disconnected or not in real time; and switching a business to the backup AC device if the main link channel is detected to be disconnected. In the invention, once the connection between an AP device and the main AC device is failed, because the backup AC device backups the state and configuration information of the AP device, and the backup AC device is always connected with the AP device, the AP device can switch the data business to the backup AC device as soon as possible in the switching of the main and the backup AC devices, thereby greatly reducing the affects to the data business of the AP device in the switching process between the main and the back up AC devices.
Description
Technical field
The present invention relates to the network communications technology, relate in particular to a kind of changing method, system and equipment of wireless controller.
Background technology
Wireless access points (Access Point is called for short AP) claims again WAP (wireless access point), is equipment commonly used when setting up at present the micro radio local area network (LAN).AP is equivalent to a bridge that is connected with spider lines and wireless network, and its Main Function is that each wireless network client is linked together, and then wireless network is accessed in the Ethernet.
Along with increasing gradually of AP quantity in the prior wireless network, the deployment way of WLAN (wireless local area network) is disposed respectively many central controlled modes of AP equipment that are transformed to from traditional separate unit AP equipment gradually, radio network controller (Access Controller, be called for short AC), claim that again wireless controller arises at the historic moment.Wireless controller is a kind of network equipment, possesses a plurality of wired ethernet interfaces, links to each other with AP equipment by cable network, is used for AP equipment is managed control and the professional forwarding of partial data.Can connect tens even hundreds of platform AP equipment under the AC equipment, AP equipment is by special communication protocol (ControlAnd Provisioning of Wireless Access Points is called for short CAPWAP) management and configuration AC equipment.
Present widely used WLAN (wireless local area network) is all disposed with reference to the CAPWAP agreement, can satisfy deployment requirements in most cases, provides wireless data service to transmit service.But the CAPWAP tunnel between AP equipment and the AC equipment is in case disconnect and will cause data service to transmit, the phenomenon that wireless network interrupts, especially some to the high situation of reliability requirement of real-time under, this impact will cause serious loss.
For fear of causing this serious loss, warm standby function is applied in the Radio Network System.Way commonly used is at present, and after the CAPWAP tunnel between AP equipment and the AC equipment disconnected, AP equipment reconnected to AC equipment for subsequent use, and AP equipment is managed and disposed to AC equipment for subsequent use again.
But the shortcoming of this way has two aspects: at first, AP equipment reconnects AC equipment for subsequent use, and this process may need several seconds even tens seconds, and the data service high on some reliability requirement of real-times still affects excessive; Secondly, AP equipment is managed and disposed to AC equipment for subsequent use again, and wireless network topology can have greatly changed, and is excessive on the operation ease impact of wireless terminal user.
Summary of the invention
The invention provides a kind of changing method, system and equipment of wireless controller, in order to overcome in the existing WLAN (wireless local area network), when in a single day the CAPWAP tunnel between AP equipment and the main AC equipment disconnects, AP equipment need to reconnect in the backup AC equipment, the defective that the overlong time that reconnects affects greatly the data service that some reliabilities and requirement of real-time are higher in the AP equipment easily.
For achieving the above object, the invention provides a kind of changing method of wireless controller, comprising:
Set up respectively with the primary link passage of main wireless controller and with the backup link passage of backup wireless controller;
By described backup link passage, the configuration information that the described main wireless controller that will receive in real time issues and state information of giving described main wireless controller to be uploaded send to described backup wireless controller and back up;
Whether the described primary link passage between detection and the described main wireless controller disconnects in real time;
If when detecting described primary link passage disconnection, business is switched in the described backup wireless controller.
For achieving the above object, the present invention also provides a kind of wireless access point device, comprising:
The Path Setup module, be used for setting up respectively with the primary link passage of main wireless controller and with the backup link passage of backup wireless controller;
The information back-up module, be used for the described backup link passage set up by described Path Setup module, the configuration information that the described main wireless controller that will receive in real time issues and state information to described main wireless controller to be uploaded send to described backup wireless controller and back up;
First detection module, whether the described primary link passage that is used between in real time detection and the described main wireless controller disconnects;
Professional handover module is if when being used for described first detection module and detecting described primary link passage and disconnect, switch to business in the described backup wireless controller.
For achieving the above object, the present invention also provides a kind of switched system of wireless controller, comprising:
Above-mentioned wireless access point device;
And the wireless controller equipment that is connected with described wireless access point device, comprise at least the main wireless controller equipment corresponding with described wireless access point device and backup wireless controller equipment in the described wireless controller equipment.
The changing method of wireless controller provided by the invention, system and equipment, by when the AP device start, connect with main AC and backup AC simultaneously, wherein manage normally control channel with the passage conduct that links of main AC equipment, with link passage as the monitoring backup path between the backup AC equipment, and in real time with the configuration information of the AP equipment that changes on the main AC equipment, and the state information backup updating that is uploaded to main AC equipment is in backup AC equipment, thereby so that when in a single day AP equipment disconnected with being connected of main AC equipment, because in real time backup has in the main AC equipment relevant information about this AP equipment in the backup AC equipment, back up simultaneously AC and keeping annexation with AP equipment always, thereby when carrying out the switching of active and standby AC equipment, AP equipment can switch to data service in the backup AC equipment soon, business need not to interrupt, and has greatly reduced the handoff procedure of active and standby AC to the impact of AP device data business.
Description of drawings
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of the changing method embodiment one of radio network controller of the present invention;
Fig. 2 is the flow chart of the changing method embodiment two of radio network controller of the present invention;
Fig. 3 is the flow chart of the changing method embodiment three of radio network controller of the present invention;
Fig. 4 is the structural representation of wireless access point device embodiment one of the present invention;
Fig. 5 is the structural representation of wireless access point device embodiment two of the present invention;
Fig. 6 is the structural representation of the switched system embodiment of radio network controller of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the flow chart of the changing method embodiment one of radio network controller of the present invention, and as shown in Figure 1, present embodiment specifically comprises the steps:
In order to keep in advance AP equipment with main AC and to back up being connected between the AC, in order to when AP equipment disconnects with linking of main AC equipment, AP equipment can be smoothly and rapidly business is switched among the backup AC, in the present invention, when the first electrifying startup of AP equipment, when wanting to be linked into wireless network, AP equipment will access among main AC and the backup AC simultaneously, namely when initial start, set up respectively with main AC between the primary link passage and and back up backup link passage between the AC.Particularly, AP equipment can pass through the CAPWAP agreement simultaneously, set up respectively with main AC between main CAPWAP passage, and and back up backup CAPWAP passage between the AC.
Set up respectively and main AC between the primary link passage and and the backup link passage of backup between the AC after, AP equipment can with connecting the road as the normal management control channel of carrying AP device data business with the main chain of main AC, realize that by this primary link passage main AC is to the management control of AP equipment and the forwarding of data service.
And meanwhile, in order in backup AC, to preserve in real time and to upgrade AP equipment and realizing in the process of data service, the correlation behavior information that main AC equipment is uploaded configuration management information and the AP equipment of AP equipment, synchronous with the AP device-dependent message preserved among the relevant information of the AP equipment that keeps preserving among the backup AC and the main AC, AP equipment is carrying out in the process of information interaction with main AC equipment, connect the configuration information that the road issues by main chain receiving main AC equipment, and when uploading state information to main AC equipment, the configuration information that also simultaneously this is received and state information to be uploaded, be sent in the backup AC equipment, in backup AC equipment, to back up.Thereby AC does not directly manage under the prerequisite of control the data service of AP equipment in backup, has preserved the relevant configuration state information of AP equipment in the data service process equally in backup AC.
If step 103 when detecting the disconnection of primary link passage, switches to business in the backup wireless controller.
And via the primary link passage, when realizing the data service of AP equipment by main AC equipment, AP equipment also detects the break-make situation of the primary link passage between self and the main AC equipment in real time, in case detect and main AC equipment between primary link passage when disconnecting, because backup AC equipment is keeping annexation with AP equipment always, and among the backup AC also always synchronous recording configuration status information about this AP equipment is arranged in the main AC equipment, thereby AP equipment can be soon switches to self data service among the backup AC this moment, and backup AC can take over this AP equipment by the backup link passage of setting up in advance rapidly.
In this handoff procedure, for all wireless terminal devices of AP equipment control, because AP equipment switches in the process that backs up among the AC and need not to rebulid and the link channel that backs up AC, need not to reconfigure the state configuration information of this AP equipment, thereby the wireless connections of all wireless terminal devices of AP equipment control can not be affected because of this handoff procedure, its data service also need not to be interrupted, thereby has really realized the seamless switching of WAP (wireless access point).
The changing method of the wireless controller of present embodiment, by when the AP device start, connect with main AC and backup AC simultaneously, wherein manage normally control channel with the passage conduct that links of main AC equipment, with link passage as the monitoring backup path between the backup AC equipment, and in real time with the configuration information of the AP equipment that changes on the main AC equipment, and the state information backup updating that is uploaded to main AC equipment is in backup AC equipment, thereby so that when in a single day AP equipment disconnected with being connected of main AC equipment, owing in the backup AC equipment there be on the main AC equipment about this AP device-dependent message in real time backup, back up simultaneously AC and keeping annexation with AP equipment always, thereby when carrying out the switching of active and standby AC equipment, AP equipment can switch to data service in the backup AC equipment soon, business need not to interrupt, and has greatly reduced the handoff procedure of active and standby AC to the impact of AP device data business.
Fig. 2 is the flow chart of the changing method embodiment two of wireless controller of the present invention, and as shown in Figure 2, present embodiment specifically comprises the steps:
In the present embodiment, for the arbitrary AP equipment in the wireless network, before establishing a connection with main AC equipment and backup AC equipment respectively, need to be in network in attachable all AC equipment, the AC equipment of choosing respectively is as main AC equipment, and chooses another AC equipment as backup AC equipment.Particularly, AP equipment can carry out choosing of active and standby AC equipment according to attachable all AC equipment load information separately, perhaps, and when having set in advance Selection Strategy in the AP equipment, AP equipment can also according to the Selection Strategy that should preset, carry out choosing of active and standby AC equipment.
For example for an AP equipment, if this AP equipment is before this and AC equipment connect, once crossed to wireless network by the AC equipment access, thereby in this AP equipment, probably based on link condition last and AC equipment, set corresponding Selection Strategy, wherein specified which platform AC equipment should be selected as main AC equipment, and specified which platform AC equipment should be selected the equipment as backup AC.Thereby AP equipment is when this carries out choosing of active and standby AC equipment, can choose respectively the AC equipment of appointment as main AC equipment according to this default Selection Strategy, and the AC equipment of choosing appointment is as backup AC equipment.And the mode of specifying AC equipment in this Selection Strategy usually can be by specifying AC equipment the identification informations such as IP address, device name be achieved.
And if any management strategy of choosing is not set in a certain AP equipment, this AP equipment then can carry out according to the load information of attachable each AC equipment when carrying out the choosing of main AC equipment and backup AC equipment.Particularly, this kind chosen mode and can be realized by following two sub-steps:
AP equipment will be found attachable all AC equipment in the wireless network when starting, and will obtain the load information that each can connect AC equipment, and this discovery flow process can be carried out according to the concrete operation step that defines in the CAPWAP agreement.Particularly, each AP equipment is when starting, all can send to wireless network and find request message (Discovery Request Message), so that all can receive the wireless AC equipment of this discovery request message in the request wireless network, after receiving this discovery request message, can return the relevant information of self.Particularly, AC equipment can be carried at relevant information to be found in the response message (Discovery Response Message), return to and send the AP equipment of finding request message, and can comprise the information such as device name of load information, IP address and this AC equipment of this AC equipment in this relevant information.Thereby by the discovery flow process that defines in this CAPWAP agreement, AP equipment can get access to the load information of all attachable AC equipment in the wireless network.
And behind the load information that gets access to each AC equipment, AP equipment is according to should corresponding to the load information of each AC equipment, carrying out choosing of active and standby AC equipment.Particularly, owing to identified the quantity of AP equipment of the current management of each AC equipment and the quantity of corresponding user terminal in the load information, thereby the load information corresponding according to each AC equipment, AP equipment can be known the loading condition of each AC equipment.Thereby based on this loading condition, AP equipment can be chosen the minimum AC equipment of present load as the main AC equipment of self, the AC equipment of the AP equipment of current management and user terminal minimum number of namely choosing is as the main AC equipment of self, and choose time few AC equipment of present load as the backup AC equipment of self, the AC equipment of load state optimum under take the main AC equipment of the management AP equipment that guarantees to choose and backup AC equipment as the present situation, thus guarantee that AP equipment can access relatively best management of performance.
After having chosen main AC equipment and backup AC equipment, AP equipment can be according to choosing the result, sets up respectively with main AC equipment and back up being connected between the AC equipment.Particularly, choose in the process above-mentioned, AP equipment can be based on the identification information of each AC equipment, for example based on IP address and the device name of AC equipment, choose have specific identification information AC equipment respectively as main AC equipment and backup AC equipment, thereby setting up in primary link passage and the backup link passage process of this step, AP equipment equally can be according to the active and standby AC equipment identification information separately of choosing, and sets up and has a link channel between the AC equipment of respective identification information.
Set up respectively and main AC between the primary link passage, and set up and backed up after the backup link passage between the AC, main AC equipment will be by the primary link passage, and AP equipment is managed configuration and the data service of AP equipment is transmitted.In the administration configuration process, AP equipment will be consulted with main AC equipment the configuration informations such as configuration and software version, in this process, AP equipment will be uploaded the state information of self to main AC equipment, and main AC equipment then will issue corresponding configuration information to AP equipment according to the result who consults.
And in the present embodiment, for backup in backup AC equipment preserve with main AC equipment in about the same configuration information of this AP equipment, so that AP equipment can switch to data service in the backup AC equipment when needed rapidly, AP equipment is being uploaded the state information of self to main AC equipment, and in the configuration information that the main AC equipment of reception issues, also will by and backup AC equipment between the backup link passage, simultaneously this state information to be uploaded is uploaded in the backup AC equipment simultaneously, and the configuration information that receives is transmitted to backup AC equipment simultaneously, in backup AC equipment, to carry out the backup of information.
Particularly, AP equipment sends state configuration information to the form that backs up AC equipment can follow self-defining information format between AP equipment and the backup AC equipment, for example this self-defining information format can be the information content of fixing manufacturer's information+standard, be that AP equipment is before the standard configuration information that the main AC equipment that receives issues, add fixing manufacturer's information, be transmitted to backup AC equipment, perhaps AP equipment is before the state information of standard of giving main AC equipment to be uploaded, add fixing manufacturer's information, with self-defining message format, send to backup AC equipment, AP equipment upload configuration information and state information to the form that backs up AC equipment are not limited among the present invention.
Thus, since also preserved synchronously in the backup AC equipment device-dependent with this AP, with main AC equipment in consistent state configuration information, if when the data service of AP equipment switches in the backup AC equipment, backup AC equipment is the backup link passage by setting up in advance directly, according to real-time synchronization with device-dependent this state configuration information of AP, AP equipment is carried out identical configuration management, and need not again to carry out with AP equipment the negotiation of relevant configuration, greatly accelerated the time that active and standby AC switches.
In the data service that realizes corresponding wireless terminal by main AC equipment, and will with the mutual state configuration information of main AC equipment be transmitted in real time back up in the backup AC equipment after, pass through the primary link passage at main AC equipment, in the process that AP equipment is managed for configuration and data service is transmitted, for when the primary link passage breaks down, AP equipment can in time carry out the switching of active and standby AC rapidly, in the present embodiment, AP equipment also will detect in real time and main AC equipment between the primary link passage whether disconnect.
This testing process can be stabbed information based on the precise time of AP equipment and main AC equipment real-time, interactive and be carried out, particularly, for time-based stamp information detects the break-make situation of primary link passage in real time, in the present embodiment, between above-mentioned steps 201 and step 202, namely when AP equipment just has been connected to main AC equipment, can also comprise the steps:
Step 204 by the primary link passage, is obtained the primary standard time of main AC equipment;
Step 205 according to the primary standard time of obtaining, is calculated the primary standard time difference of primary standard between the time of First ground reference time and main AC equipment;
For know and main AC equipment between standard time poor, when AP equipment just has been connected to main AC equipment, AP equipment also needs to obtain the primary standard time BaseTime1 of main AC equipment by the primary link passage of setting up, and namely obtains the current time of main AC equipment when the primary link passage has just been set up.And after having obtained this primary standard time BaseTime1, AP equipment can calculate the primary standard time difference AdjustTime1 between this primary standard time and First ground reference time according to the First ground reference time BaseTimeAP1 of the machine.Particularly, this First ground reference time BaseTimeAP1 is the local current time of AP equipment when just having set up with the primary link passage of main AC equipment, thereby this primary standard time difference AdjustTime1 that calculates correspondingly is primary link passage when just having set up, standard time between AP equipment and the main AC equipment is poor, and AdjustTime1=BaseTimeAP1-BaseTime1.
Calculated by above-mentioned steps and main AC equipment between fiducial time poor after, the break-make situation of primary link passage is detected particularly can comprise following substep in real time:
Carrying out in the mutual process of data message with main AC equipment, AP equipment can pass through the primary link passage, obtain in real time the current time value CurrentTime of main AC equipment from main AC equipment, thereby the current time information according to this main AC equipment that obtains, AP equipment can calculate under the current state in real time, main AC equipment and poor AdjustTime2=CurrentTimeAP-CurrentTime of the main current time between the local current time.Particularly, AP equipment obtains the current time value from main AC equipment, can be achieved by the current time information that carries main AC equipment in each the CAPWAP message that sends to AP equipment at main AC equipment, each the CAPWAP message that namely allows main AC equipment send to AP equipment is time detecting and contributes, simultaneously, AP equipment can also periodically send the request of obtaining current time information to main AC equipment, so that main AC equipment returns the current time information of self termly.
And after calculating main AC equipment and the main current time difference between the local current time, AP equipment can be poor according to the main current time that calculates in real time, detects this main current time difference and the difference DataTime=AdjustTime2-AdjustTime1 of above-mentioned primary standard between the time difference and whether exceeded default difference range.Namely since the primary standard time difference be that the primary link passage is when just having set up, standard time between main AC equipment and the AP equipment is poor, by poor AdjustTime2 of main current time and this primary standard time AdjustTime1 are compared, AP equipment can be understood the current link situation of primary link passage, whether occured to delay, and the degree that delays.And should default difference range be according to the practical experience value, the maximum difference time that delays that in AP equipment, arranges.
If by detecting, main current time difference and the difference of primary standard between the time difference between AP device discovery and the main AC equipment have surpassed default difference range, AP equipment can tentatively conclude and main AC equipment between the primary link passage disconnection phenomenon may occur, and in order to confirm this phenomenon, in the present embodiment, AP equipment also will be further to the detection messages of main AC equipment transmission for detection of the break-make situation of primary link passage, and detect within the default time, whether can receive the detection response message that main AC equipment returns, detect the primary link passage with this and whether veritably fault has occured and disconnect.
Step 206 switches to business in the backup AC equipment.
If within the default time, AP equipment does not also receive the detection response message that main AC equipment returns, then AP equipment can conclude veritably and main AC equipment between the primary link passage disconnect, thereby according to detected this result, AP equipment switches to the business of the wireless terminal of self correspondence in the backup AC equipment.Because it is device-dependent synchronously to have preserved AP in the backup AC equipment, with state configuration information consistent in the main AC equipment, and set up in advance the backup link passage between AP equipment and the backup AC equipment, thereby after active and standby AC equipment switches, backup AC equipment can be by the backup link passage of setting up in advance, according to real-time synchronization with device-dependent this state configuration information of AP, AP equipment is carried out identical configuration management, and need not to rebulid with AP equipment between CAPWAP link, need not again to carry out with AP equipment the negotiation of relevant configuration, thereby greatly accelerated the time that active and standby AC switches, even can the data service of wireless terminal corresponding to AP not had any impact.
The changing method of the wireless controller of present embodiment, by when the AP device start, connect with main AC and backup AC simultaneously, wherein manage normally control channel with the passage conduct that links of main AC, with link passage as the monitoring backup path between the backup AC equipment, and in real time with the configuration information of the AP equipment that changes on the main AC equipment, and the state information backup updating that is uploaded to main AC equipment is in backup AC equipment, thereby so that when in a single day AP equipment disconnected with being connected of main AC equipment, owing in the backup AC equipment there be on the main AC equipment about this AP device-dependent message in real time backup, back up simultaneously AC and keeping annexation with AP equipment always, thereby when carrying out the switching of active and standby AC equipment, AP equipment can switch to data service in the backup AC equipment soon, business need not to interrupt, and has greatly reduced the handoff procedure of active and standby AC to the impact of AP device data business.
Further, in the present embodiment, AP equipment also passes through the break-make situation of the primary link passage between in real time detection and the main AC equipment, in a single day so that when detecting the disconnection of primary link passage, can in time business be switched in the backup AC equipment in the very first time, thereby further reduce the impact that link failure causes the business of AP equipment.
Fig. 3 is the flow chart of the changing method embodiment three of radio network controller of the present invention.On the basis of above-described embodiment two, in the present embodiment, AP equipment is when whether the primary link passage between detection and the main AC equipment disconnects in real time, in order to guarantee simultaneously the connection good condition as the backup link passage of backup, so that when active and standby AC switching occurs, the backup link passage is in the state of connection, and whether the backup link passage that AP equipment also will detect between self and the backup AC equipment in real time disconnects.
Particularly, in the present embodiment, after AP equipment just has been connected to main AC equipment and backup AC equipment, obtain the primary standard time of main AC equipment at AP equipment, and the primary standard between calculating and the main AC equipment is in the time of the time difference, also should pass through simultaneously the backup link passage, obtain the backup fiducial time of backup AC equipment, and the backup of calculating and backing up between the AC equipment is poor fiducial time.Particularly, as shown in Figure 3, on the basis of above-described embodiment two, in the present embodiment, step 201 set up respectively and main AC equipment between the primary link passage and and backup AC equipment between the backup link passage after, step 204 and step 205 are specifically as follows following step 204 ' and step 205 ':
Step 204 ', respectively by primary link passage and backup link passage, obtain the primary standard time of main AC equipment and the backup fiducial time of backup AC equipment;
Step 205 ', calculate respectively First ground reference time and the primary standard primary standard time difference between the time, and the second local reference time and the backup of backup between fiducial time are poor fiducial time;
In the present embodiment, AP equipment is passing through the primary link passage, obtain the primary standard time of main AC equipment, and according to the primary standard time that gets access to, calculate primary standard between self and the main AC equipment in the time of the time difference, also simultaneously by the backup link passage, obtain the backup fiducial time of backup AC equipment, and according to the backup fiducial time that gets access to, the backup of calculating between self and the backup AC equipment is poor fiducial time.
The account form of concrete computational process and primary standard time difference is consistent, that is: AP is at the backup link passage by just having set up, get access to the backup AC current time of equipment when the backup link passage has just been set up, namely get access to backup BaseTime1 ' fiducial time afterwards, the second current local reference time BaseTimeAP2 according to the machine, can calculate poor this second local reference of AdjustTime1 ' time BaseTimeAP2 backup fiducial time between this backup BaseTime1 ' fiducial time and the second local reference time BaseTimeAP2 and be AP equipment and backup AC equipment between the local current time of backup link passage when just having set up, and the backup poor AdjustTime1 ' fiducial time that calculates=BaseTimeAP2-BaseTime 1 '.
Need to prove, although in the present embodiment, carry out to the AP device synchronization and main AC equipment between the primary link passage and and backup AC equipment between the foundation of backup link passage, but the sequencing that primary link passage and backup link Path Setup are finished but is not to fix, and is usually relevant with practical situations.Thereby current time of AP equipment when just having set up for above-mentioned primary link passage, be First ground reference time BaseTimeAP1, and the current time of backup link passage AP equipment when just having set up, i.e. the second local reference time BaseTimeAP2, both may for AP equipment at the same time current time, also might be the current time of AP equipment in different time points, depend on the speed of primary link passage and backup link Path Setup speed.And corresponding which kind of which kind of situation no matter can not produce any impact to primary standard time difference and backup poor computational process fiducial time.
And after when calculating primary standard time difference AdjustTime1, also calculating backup poor AdjustTime1 ' fiducial time, in the present embodiment, in real time the break-make situation of primary link passage is being detected simultaneously, AP equipment also will be poor fiducial time according to the backup that calculates, and detect in real time the break-make situation of backup link passage.Namely as shown in Figure 3, in the method for present embodiment, also comprise:
Particularly, this step is to the break-make condition detection of backup link passage, and in a upper embodiment, AP equipment is consistent to the mode of the break-make condition detection of primary link passage, and this step specifically can comprise following substep:
In the present embodiment, AP equipment detect in real time and main AC equipment between link break-make situation in, AP equipment can also pass through the backup link passage, obtain in real time the current time value CurrentTime ' of backup AC equipment, thereby according to the current time of this backup AC equipment that obtains, AP equipment can calculate under the current state in real time, backup AC equipment and poor AdjustTime2 ' of the backup current time between the local current time=CurrentTimeAP-CurrentTime '.
After calculating backup AC equipment and the backup current time difference between the local current time, AP equipment is can be in real time poor according to the backup current time that calculates, and detects difference DataTime ' between differing from fiducial time of this backup current time poor and above-mentioned backup=AdjustTime2 '-AdjustTime1 ' and whether has exceeded default difference range.Namely owing to backed up when fiducial time, difference was just set up for the backup link passage, standard time between backup AC equipment and the AP equipment is poor, compare with this backup standard time by backing up the current time difference, AP equipment can be understood the current link situation of backup link passage, whether occured to delay, and the degree that delays.And should default difference range be similarly according to the practical experience value maximum difference time that delays that in AP equipment, arranges.
If by detecting, the backup current time between AP device discovery and the backup AC equipment, difference poor and that back up between difference fiducial time surpassed default difference range, the disconnection phenomenon may occur in the backup link passage that AP equipment can tentatively be concluded and back up between the AC equipment, and in order to confirm this phenomenon, in the present embodiment, AP equipment also will be further to the detection messages of backup AC equipment transmission for detection of the break-make situation of backup link passage, and detect within the default time, whether can receive the detection response message that backup AC equipment returns, detect the backup link passage with this and whether veritably fault has occured and disconnect.
Step 208 rebulids and backs up the backup link passage between the AC equipment, and again self current configuration information and current state information is uploaded to state in the backup AC equipment and backs up.
If within the default time, AP equipment does not also receive the detection response message that backup AC equipment returns, then the AP equipment backup link passage that can conclude veritably and back up between the AC equipment disconnects, thereby according to detected this result, and in order to keep in time the conducting as the backup link passage of backup, AP equipment will rebulid and back up the backup link passage between the AC equipment immediately, and on this basis, again with main AC equipment to the current configuration information of oneself and the current state information of oneself, be uploaded to state in the backup AC equipment by the backup link passage that rebulids and re-start backup.
Thereby whether disconnect by detecting in real time the backup link passage, in a single day and when detecting the disconnection of backup link passage, again this backup link passage is set up, and again back up the relevant configuration state information, present embodiment has been avoided when the primary link passage breaks down, the backup link passage also just in time is in the disconnection situation, and causes carrying out fast the phenomenon that active and standby AC switches, and further reduces the impact that link failure causes the business of AP equipment.
Need to prove, distinct between above-mentioned steps and above-described embodiment two in the present embodiment, other steps are all identical with upper above-described embodiment two, thereby its specific explanations can referring to the associated description in above-described embodiment two, not repeated them here.
The changing method of the wireless controller of present embodiment, by when the AP device start, connect with main AC and backup AC simultaneously, wherein manage normally control channel with the passage conduct that links of main AC, with link passage as the monitoring backup path between the backup AC equipment, and in real time with the configuration information of the AP equipment that changes on the main AC equipment, and the state information backup updating that is uploaded to main AC equipment is in backup AC equipment, thereby so that when in a single day AP equipment disconnected with being connected of main AC equipment, owing in the backup AC equipment there be on the main AC equipment about this AP device-dependent message in real time backup, back up simultaneously AC and keeping annexation with AP equipment always, thereby when carrying out the switching of active and standby AC equipment, AP equipment can switch to data service in the backup AC equipment soon, business need not to interrupt, and has greatly reduced the handoff procedure of active and standby AC to the impact of AP device data business.
Further, in the present embodiment, AP equipment also passes through the break-make situation of the primary link passage between in real time detection and the main AC equipment, and the break-make situation that detects and back up in real time the backup link passage between the AC equipment, in a single day so that when detecting the disconnection of primary link passage, can in time business be switched in the backup AC equipment in the very first time, in a single day and when detecting the disconnection of backup link passage, can be re-established into the connection of backup AC equipment and upgrade backup information in timing, thereby further reduce the impact that link failure causes the business of AP equipment.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 4 is the structural representation of wireless access point device embodiment one of the present invention, and as shown in Figure 4, the wireless access point device of present embodiment comprises: Path Setup module 11, information back-up module 12, first detection module 13 and professional handover module 14.
Wherein, Path Setup module 11 be used for setting up respectively with the primary link passage of main wireless controller and with the backup link passage of backup wireless controller; Information back-up module 12 is used for the backup link passage set up by Path Setup module 11, and the configuration information that the main wireless controller that will receive in real time issues and state information of giving main wireless controller to be uploaded send to the backup wireless controller and back up; First detection module 13 for detection of to and main wireless controller between the primary link passage whether disconnect; And if professional handover module 14 be used for first detection module detect 13 to and main wireless controller between primary link passage when disconnecting, business is switched in the backup wireless controller.
Particularly, the specific works process that all modules in the present embodiment are related can with reference to the related content of the related related embodiment exposure of the changing method of above-mentioned wireless controller, not repeat them here.
The wireless access point device of present embodiment, by when the initial start, connect with main AC and backup AC simultaneously, wherein manage normally control channel with the passage conduct that links of main AC, with link passage as the monitoring backup path between the backup AC equipment, and in real time with the configuration information of the AP equipment that changes on the main AC equipment, and the state information backup updating that is uploaded to main AC equipment is in backup AC equipment, thereby so that when in a single day AP equipment disconnected with being connected of main AC equipment, owing in the backup AC equipment there be on the main AC equipment about this AP device-dependent message in real time backup, back up simultaneously AC and keeping annexation with AP equipment always, thereby when carrying out the switching of active and standby AC equipment, AP equipment can switch to data service in the backup AC equipment soon, business need not to interrupt, and has greatly reduced the handoff procedure of active and standby AC to the impact of AP device data business.
Fig. 5 is the structural representation of wireless access point device embodiment two of the present invention, as shown in Figure 5, on the basis of above-mentioned wireless access point device embodiment one, the wireless access point device of present embodiment can also comprise very first time acquisition module 15 and poor computing module 16 of the very first time.Wherein, very first time acquisition module 15 be used for Path Setup module 11 sets up respectively and the primary link passage of wireless controller and and back up backup link passage between the wireless controller after, by the primary link passage, obtain the primary standard time of main wireless controller, this primary standard time is the current time of primary link passage when just having set up, main wireless controller; The very first time, poor computing module 16 was then for the primary standard time of obtaining according to very first time acquisition module 15, calculate the primary standard time difference of primary standard between the time of First ground reference time and this main wireless controller, the current time of this locality when this First ground reference time has just set up for this primary link passage.
Correspondingly, first detection module 13 specifically can comprise: the very first time obtains submodule, poor calculating sub module of the very first time, the first detection sub-module and the first message and sends the submodule (not shown).
Wherein, the very first time is obtained the current time that submodule is used for obtaining in real time main wireless controller; Poor calculating sub module of the very first time is used for calculating in real time the very first time, and to obtain current time of the main wireless controller that submodule obtains poor with the main current time between the current time of this locality; Whether the first detection sub-module has exceeded default difference range for detection of main current time difference and the difference of primary standard between the time difference; If the first message sends submodule when then being used for the first detection sub-module and detecting difference and exceeded default difference range, send detection messages to detect the break-make situation of primary link passage to main wireless controller, if main wireless controller does not return the detection response message within the default time, conclude that then this primary link passage disconnects.
Further, in the present embodiment, wireless access point device can also comprise that first chooses module 17, comprises that perhaps load information acquisition module 18 and second chooses module 19.
Particularly, first choose module 17 be used for Path Setup module 11 sets up respectively and the primary link passage of main wireless controller and and back up backup link passage between the wireless controller before, according to default Selection Strategy, choose respectively the wireless controller of this Selection Strategy appointment as main wireless controller and backup wireless controller.
And load information acquisition module 18 is used for obtaining the load information of attachable each wireless controller of wireless network; Second chooses 19 load informations for each wireless controller that gets access to according to load information acquisition module 18 of module, choose the minimum wireless controller of load as main wireless controller, and choose the inferior few wireless controller of load as the backup wireless controller.
Further, in the present embodiment, wireless access point device can also comprise the second detection module 110 and link re-establishment formwork erection piece 111.Wherein, whether the second detection module 110 disconnects for the backup link passage that detects in real time and back up between the wireless controller; When if link re-establishment formwork erection piece 111 then detects the disconnection of backup link passage for the second detection module 110, rebulid and back up the backup link passage between the wireless controller, and again self current configuration information and current state information is uploaded to backup and backs up in the wireless controller.
On this basis, further, in the wireless access point device of present embodiment, can also comprise the second time-obtaining module 112 and the second time difference computing module 113.Wherein, the second time-obtaining module 112 be used for Path Setup module 11 sets up respectively and the primary link passage of main wireless controller and and back up backup link passage between the wireless controller after, by the backup link passage, obtain the backup fiducial time of backup wireless controller, the current time that this backup is backup link passage when just having set up fiducial time, back up wireless controller; It is poor fiducial time with the backup of backing up between fiducial time that the second time difference computing module 113 then be used for to calculate for the second local reference time, and this second local reference time is the current time of backup link passage this locality when just having set up.
Correspondingly, above-mentioned the second detection module 110 specifically can also comprise: the second time obtained submodule, the second time difference calculating sub module, the second detection sub-module and the second message and sends the submodule (not shown).
Wherein the second time was obtained the current time that submodule is used for obtaining in real time the backup wireless controller; It is poor for the backup current time between the current time of calculating in real time the backup wireless controller and local current time that the second time difference was calculated submodule; Whether the second detection sub-module difference poor for detection of the backup current time and that back up between difference fiducial time has exceeded default difference range; If then detecting this difference for the second detection sub-module, the second message transmission submodule exceeded default difference range, then send detection messages to detect the break-make situation of backup link passage to the backup wireless controller, if and back up wireless controller and within the default time, do not return the detection response message, conclude that then the backup link passage disconnects.
Particularly, the related specific works process of above-mentioned all modules in the present embodiment can with reference to the related content of the related related embodiment exposure of the changing method of above-mentioned wireless controller, not repeat them here equally.
The wireless access point device of present embodiment, by when the initial start, connect with main AC and backup AC simultaneously, wherein manage normally control channel with the passage conduct that links of main AC, with link passage as the monitoring backup path between the backup AC equipment, and in real time with the configuration information of the AP equipment that changes on the main AC equipment, and the state information backup updating that is uploaded to main AC equipment is in backup AC equipment, thereby so that when in a single day AP equipment disconnected with being connected of main AC equipment, owing in the backup AC equipment there be on the main AC equipment about this AP device-dependent message in real time backup, back up simultaneously AC and keeping annexation with AP equipment always, thereby when carrying out the switching of active and standby AC equipment, AP equipment can switch to data service in the backup AC equipment soon, business need not to interrupt, and has greatly reduced the handoff procedure of active and standby AC to the impact of AP device data business.
Further, in the present embodiment, AP equipment also passes through the break-make situation of the primary link passage between in real time detection and the main AC equipment, and the break-make situation that detects and back up in real time the backup link passage between the AC equipment, in a single day so that when detecting the disconnection of primary link passage, can in time business be switched in the backup AC equipment in the very first time, in a single day and when detecting the disconnection of backup link passage, can be re-established into the connection of backup AC equipment and upgrade backup information in timing, thereby further reduce the impact that link failure causes the business of AP equipment.
Fig. 6 is the structural representation of the switched system embodiment of radio network controller of the present invention, as shown in Figure 6, the switched system of the radio network controller of present embodiment specifically comprises above-mentioned wireless access point device 1, and the wireless controller equipment 2 that is connected with wireless access point device 1, comprise at least the main wireless controller equipment corresponding with wireless access point device 1 21 and backup wireless controller equipment 22 in this wireless controller equipment.
Need to be appreciated that, in the practical application, can comprise a plurality of wireless access point devices 1 (only showing among Fig. 5) in the switched system of radio network controller, and corresponding, should comprise the main wireless controller equipment 21 corresponding with each wireless access point device 1 difference and backup wireless controller equipment 22 in the system.And for arbitrary wireless controller equipment 2, it can also be the backup wireless controller equipment 22 of another wireless access point device 1 in the main wireless controller equipment 21 that is a certain wireless access point device 1.
Particularly, in the present embodiment, all modules that wireless access point device 1 comprises, and the related specific works process of all modules, the related content that can disclose with reference to changing method and the related related embodiment of wireless access point device of above-mentioned wireless controller does not repeat them here.
The switched system of the radio network controller of present embodiment, by when the initial start of AP equipment, connect with main AC and backup AC simultaneously, wherein manage normally control channel with the passage conduct that links of main AC, with link passage as the monitoring backup path between the backup AC equipment, and in real time with the configuration information of the AP equipment that changes on the main AC equipment, and the state information backup updating that is uploaded to main AC equipment is in backup AC equipment, thereby so that when in a single day AP equipment disconnected with being connected of main AC equipment, owing in the backup AC equipment there be on the main AC equipment about this AP device-dependent message in real time backup, back up simultaneously AC and keeping annexation with AP equipment always, thereby when carrying out the switching of active and standby AC equipment, AP equipment can switch to data service in the backup AC equipment soon, business need not to interrupt, and has greatly reduced the handoff procedure of active and standby AC to the impact of AP device data business.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. the changing method of a wireless controller is characterized in that, comprising:
Set up respectively with the primary link passage of main wireless controller and with the backup link passage of backup wireless controller; By described backup link passage, the configuration information that the described main wireless controller that will receive in real time issues and state information of giving described main wireless controller to be uploaded send to described backup wireless controller and back up;
Whether the described primary link passage between detection and the described main wireless controller disconnects in real time;
Disconnect if detect described primary link passage, then business is switched in the described backup wireless controller;
Wherein, described set up respectively with the primary link passage of main wireless controller and and back up after the backup link passage between the wireless controller, described method also comprises:
By described primary link passage, obtain the primary standard time of described main wireless controller, the described primary standard time is the current time of described primary link passage when just having set up, described main wireless controller;
Calculate First ground reference time and the primary standard time difference of described primary standard between the time, the described First ground reference time is the current time of described primary link passage this locality when just having set up;
Whether the described primary link passage between described in real time detection and the described main wireless controller disconnects specifically and comprising:
Obtain in real time the current time of described main wireless controller, and it is poor to calculate in real time current time and main current time between the local current time of described main wireless controller;
Detect described main current time difference and the difference of described primary standard between the time difference and whether exceeded default difference range;
If exceeded described default difference range, then send detection messages to detect the break-make situation of described primary link passage to described main wireless controller, if described main wireless controller does not return the detection response message within the default time, conclude that then described primary link passage disconnects.
2. the changing method of wireless controller according to claim 1 is characterized in that, described set up respectively with the primary link passage of main wireless controller and and back up before the backup link passage between the wireless controller, described method also comprises:
According to default Selection Strategy, choose respectively the wireless controller of described Selection Strategy appointment as described main wireless controller and backup wireless controller; Perhaps,
Obtain the load information of attachable each wireless controller in the wireless network;
According to the load information of described each wireless controller that gets access to, choose the minimum wireless controller of load as described main wireless controller, choose the inferior few wireless controller of load as described backup wireless controller.
3. the changing method of wireless controller according to claim 1 is characterized in that, described set up respectively with the primary link passage of main wireless controller and with the backup link passage of backup wireless controller after, described method also comprises:
Whether the described backup link passage between detection and the described backup wireless controller disconnects in real time;
Disconnect if detect described backup link passage, rebulid the described backup link passage with described backup wireless controller, and again self current configuration information and current state information is uploaded in the described backup wireless controller and backs up.
4. the changing method of wireless controller according to claim 3 is characterized in that:
Described set up respectively with the primary link passage of main wireless controller and and back up after the backup link passage between the wireless controller, described method also comprises:
By described backup link passage, obtain the backup fiducial time of described backup wireless controller, described backup is the current time of described backup link passage when just having set up, described backup wireless controller fiducial time;
The backup of calculating between the second local reference time and described backup fiducial time is poor fiducial time, and described the second local reference time is the current time of described backup link passage this locality when just having set up;
Whether the described backup link passage between described in real time detection and the described backup wireless controller disconnects specifically and comprising:
Obtain in real time the current time of described backup wireless controller, and it is poor to calculate in real time current time and backup current time between the local current time of described backup wireless controller;
Whether the difference that detects between poor and described backup of described backup current time difference fiducial time has exceeded default difference range;
If exceeded described default difference range, then send detection messages to detect the break-make situation of described backup link passage to described backup wireless controller, if described backup wireless controller does not return the detection response message within the default time, conclude that then described backup link passage disconnects.
5. a wireless access point device is characterized in that, comprising:
The Path Setup module, be used for setting up respectively with the primary link passage of main wireless controller and with the backup link passage of backup wireless controller;
The information back-up module, be used for the described backup link passage set up by described Path Setup module, the configuration information that the described main wireless controller that will receive in real time issues and state information to described main wireless controller to be uploaded send to described backup wireless controller and back up;
First detection module, whether the described primary link passage that is used between in real time detection and the described main wireless controller disconnects;
Professional handover module is if when being used for described first detection module and detecting described primary link passage and disconnect, switch to business in the described backup wireless controller;
Described equipment also comprises:
Very first time acquisition module, be used for described Path Setup module set up respectively and the primary link passage of main wireless controller and and the backup wireless controller between the backup link passage after, by described primary link passage, obtain the primary standard time of described main wireless controller, the described primary standard time is the current time of described primary link passage when just having set up, described main wireless controller;
Poor computing module of the very first time, the primary standard time difference of primary standard between the time that is used for calculating First ground reference time and described main wireless controller, the described First ground reference time is the current time of described primary link passage this locality when just having set up;
Described first detection module specifically comprises:
The very first time is obtained submodule, is used for obtaining in real time the current time of described main wireless controller;
Poor calculating sub module of the very first time, being used for calculating in real time the described very first time, to obtain current time of the main wireless controller that submodule obtains poor with the main current time between the current time of this locality;
Whether the first detection sub-module has exceeded default difference range for detection of described main current time difference and the difference of described primary standard between the time difference;
The first message sends submodule, exceeded described default difference range if detect described difference for described the first detection sub-module, then send detection messages to detect the break-make situation of described primary link passage to described main wireless controller, if described main wireless controller does not return the detection response message within the default time, conclude that then described primary link passage disconnects.
6. wireless access point device according to claim 5 is characterized in that:
Described equipment comprises that also first chooses module, be used for described Path Setup module set up respectively and the primary link passage of main wireless controller and and the backup wireless controller between the backup link passage before, according to default Selection Strategy, choose respectively the wireless controller of described Selection Strategy appointment as described main wireless controller and backup wireless controller; Perhaps
Described equipment comprises that also load information acquisition module and second chooses module;
Described load information acquisition module is used for obtaining the load information of attachable each wireless controller of wireless network;
Described second chooses module for the load information of described each wireless controller that gets access to according to described load information acquisition module, choose the minimum wireless controller of load as described main wireless controller, choose the inferior few wireless controller of load as described backup wireless controller.
7. wireless access point device according to claim 5 is characterized in that, described equipment also comprises:
The second detection module, whether the described backup link passage that is used between in real time detection and the described backup wireless controller disconnects;
Link re-establishment formwork erection piece, detect described backup link passage disconnection if be used for described the second detection module, rebulid the described backup link passage with described backup wireless controller, and again self current configuration information and current state information is uploaded in the described backup wireless controller and backs up.
8. wireless access point device according to claim 7 is characterized in that:
Described equipment also comprises:
The second time-obtaining module, be used for described Path Setup module set up respectively and the primary link passage of main wireless controller and and the backup wireless controller between the backup link passage after, by described backup link passage, obtain the backup fiducial time of described backup wireless controller, described backup is the current time of described backup link passage when just having set up, described backup wireless controller fiducial time;
The second time difference computing module, the second local reference time of be used for calculating is poor fiducial time with the described backup of backing up between fiducial time, and described the second local reference time is the current time of described backup link passage this locality when just having set up;
Described the second detection module specifically comprises:
The second time was obtained submodule, was used for obtaining in real time the current time of described backup wireless controller;
The second time difference calculating sub module, the current time that is used for calculating in real time described backup wireless controller is poor with the backup current time between the current time of this locality;
Whether the second detection sub-module has exceeded default difference range for detection of the difference between poor and described backup of described backup current time difference fiducial time;
The second message sends submodule, exceeded described default difference range if detect described difference for described the second detection sub-module, then send detection messages to detect the break-make situation of described backup link passage to described backup wireless controller, if described backup wireless controller does not return the detection response message within the default time, conclude that then described backup link passage disconnects.
9. the switched system of a wireless controller is characterized in that, comprising:
Such as the arbitrary described wireless access point device of claim 5～8;
And the wireless controller equipment that is connected with described wireless access point device, comprise at least the main wireless controller equipment corresponding with described wireless access point device and backup wireless controller equipment in the described wireless controller equipment.
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| CN 201010226059 CN101951616B (en) | 2010-07-06 | 2010-07-06 | Switching method, system and device for wireless controller |
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| CN103179595B (en) * | 2011-12-23 | 2016-08-10 | 中国移动通信集团广东有限公司 | WLAN controller switching equipment, test and disaster recovery method, Apparatus and system |
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| CN102752172B (en) * | 2012-07-13 | 2014-12-31 | 杭州华三通信技术有限公司 | Control method and control device for switching AP (Access Point) between hot standby ACs (Access Controllers) |
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| CN107222883B (en) * | 2017-07-12 | 2020-06-16 | 锐捷网络股份有限公司 | Wireless controller backup method, backup switching method, device and system |
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