CN103686796A - Wireless channel selection method with uninterruptible communication - Google Patents
Wireless channel selection method with uninterruptible communication Download PDFInfo
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- CN103686796A CN103686796A CN201310724519.XA CN201310724519A CN103686796A CN 103686796 A CN103686796 A CN 103686796A CN 201310724519 A CN201310724519 A CN 201310724519A CN 103686796 A CN103686796 A CN 103686796A
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Abstract
The invention provides a wireless channel selection method with uninterruptible communication, which is used for finishing a scheme of adjustment for AP (Access Point) and STA (Station) channels in a WIFI application. The wireless channel selection method with uninterruptible communication comprises the steps that: step S1, after the AP/STA is started up, the AP performs timing on the connected and verified STA in a WiFi network to establish a uniform high-precision relative time service in a wireless region through scheduling of a scheduling service unit; step S2, the AP detects and analyzes characteristics of a surrounding wireless environment periodically and adjusts relevant wireless parameters by cooperating with a flow statistic result of a local wireless network; step S3, the AP starts up transaction flows of broadcasting, adjusting and verifying the wireless parameters, and the STA cooperates with the AP to finish the adjustment of the local wireless parameters synchronously. The wireless channel selection method with uninterruptible communication disclosed by the invention is suitable to be applied in a complex and congested WIFI environment which is caused by coexistence of multi-family wireless networks in a residential district and coexistence of multiple wireless networks in a public place.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of wireless channel selecting method of uninterrupted communication.
Background technology
WiFi wireless network is used 2.4G/5G as its working frequency range, and the channel wireless resource of frequency range that can adopt is very limited, and when WiFi standard evolves to after the highest 300Mbps of support of 802.11n in a large number, it is very nervous that the resource of frequency range becomes especially.Especially in residential quarter or part public arena there are among a small circle space (diameter 100M) a large amount of wireless aps (Access Point, hotspot) coexist, and these AP are subject to the restriction of routine techniques, can not adjust dynamically the content such as channel, bin width, wireless burst parameter, economize on electricity of self, cause wireless telecommunications seriously to block up, speed, delay severe exacerbation, the Radio Resources such as while band segment are but wasted and cannot use.
Current wireless technology allows AP to survey periphery channel occupancy situation when initial startup, automatically select more idle channel work, but this function exists obvious defect, is mainly manifested in:
1. AP no longer has the function of adjusting channel after starting, and the parameter that can not adjust WiFi network with the variation of periphery wireless environment makes it be operated in optimum state;
2. any wireless parameter of AP is revised, all need STA(Station, access website) wireless network of equipment is cut off, reconnects by long-time (being greater than 30 seconds), and this carries out Stream Media Application (as video, audio frequency) at STA equipment, and is unacceptable while not supporting the service of retry.
With popularizing of wireless city and family wireless network, smart mobile phone etc. are supported the increase of the mobile device of WiFi, and to making full use of existing radio band resource, the demand of improving wireless telecommunications quality is more and more urgent.
Therefore, how to solve many separate networks that current WIFI network occurs and coexist in space among a small circle, cause and wirelessly block up that Radio Resource is simultaneously wasted, the problem of the defect of communication quality degradation, become the technical problem that current urgent need solves.
Summary of the invention
In order to solve the problems referred to above of prior art, the invention provides a kind of wireless channel selecting method of uninterrupted communication, to solve many separate networks of current WIFI network appearance, coexist in space among a small circle, cause the wireless Radio Resource simultaneously that blocks up to be wasted, the defect of communication quality degradation.
A wireless channel selecting method for uninterrupted communication, it is for completing the scheme to WIFI application AP and STA channel adjustment, and it comprises:
After step S1:AP/STA starts, AP carries out time service by the STA that is attached thereto checking in WiFi network, sets up unified high accuracy relative time service in wireless zone;
Step S2:AP periodically surveys and analyzes periphery wireless environment feature, coordinates the traffic statistics result of Local wireless network, and relevant wireless parameter is adjusted;
The flow of transactions that step S3:AP starts wireless parameter broadcast, adjusts, verifies, STA coordinates AP, synchronously completes local wireless parameter adjustment.
Wherein, the wireless channel selecting method of described uninterrupted communication further comprises step S4: verify and complete parameter adjustment transaction.
Wherein, step S1 further comprises
Step S11: initialization and the foundation of wireless basis driving and wireless direct control channel;
Step S12: the foundation of wireless zone split-second precision service.
Wherein, step S12 further comprises:
AP end obtains by local zone time source the relative time standard that real-time time or available machine time adopt as the time service of this wireless zone;
AP periodically carries out time service by the heartbeat packet of expansion to all STA broadcast;
STA listens to time service order and after the time, calibrates local relative time, and passes time service result back;
AP receives the time service result that STA beams back, and calculates without wire delay, with reference to current wireless communication traffic, judges that whether time service is effective; If certain STA time service overlong time, repeatedly time service in the overtime scope of packet radio; As found, still have STA by time service, by the outside API of AP, not give a warning;
STA, by time service and for first, starts inner timer service.
In step S2, AP periphery wireless environment feature comprises: respectively tenability and the current network traffics of wireless network of the channel of the STA by authentication, channel size, wireless burst pattern, wireless huge bag etc. in the distribution situation of the quantity of other wireless networks that each wireless channel of AP periphery occurs and signal strength signal intensity, the wide wireless channel of other wireless networks of AP periphery, wireless network.
The flow of transactions of wherein, wireless parameter broadcast, adjustment, checking is specific as follows:
AP notifies all STA start-up parameter to adjust flow process by heartbeat packet, and the description of parameter adjustment is provided;
STA reports the ability of self parameter correlation, gives security especially and can carry out the relative time of parameter adjustment;
The parameter adjustment ability of AP checking STA, gets each STA simultaneously and reports the maximum in can the relative time of complete operation, with reference to each STA without wire delay, the relative time of executable operations is proposed;
AP is broadcast to all STA by heartbeat packet by the relative time of the particular content of this parameter adjustment and executable operations;
STA receives after this operation particular content, confirms and notify AP; If confirm unsuccessfully, to AP, submit to and confirm failure information, and failure cause;
AP obtains, after the confirmation of all STA, by broadcast, starting this operation; If still have STA to confirm unsuccessfully, to adjust according to failure cause, or cancel this adjustment;
AP/STA receives and starts after this operation information, and timer is set, and completes this operation, and submit successful information in the time of implementation of consulting by wireless direct control channel;
The successful information that AP checking is received, completes this operation.
Wherein, all parameter adjustments and checking all complete in limited AP heartbeat packet.
Wherein, AP/STA communication realizes by heartbeat packet.
Compared with prior art, adopt the wireless channel selecting method of uninterrupted communication of the present invention, AP monitors network environment in real time, do not affecting under the prerequisite of wireless network communication, the variation of STA or AP around coordinating, adjust the network parameter of self, make all the time self network in optimum state, can fine solution prior art in network parameter configuration can not coordinate variation, the wireless network variation of wireless environment can cause long-time suspension, Radio Resource by problems such as wastes in a large number.
Accompanying drawing explanation
Fig. 1 is the modular structure figure of wireless client STA in the wireless channel selecting method of the uninterrupted communication of the present invention.
Fig. 2 is the modular structure figure of wireless client AP in the wireless channel selecting method of the uninterrupted communication of the present invention.
Embodiment
As depicted in figs. 1 and 2, in the AP/STA of embodiments of the invention framework, it is former AP or the original driving of STA that AP/STA basis drives (Basic Driver), AP/STA direct control channel (Direct Control Channel) is according to the type of wireless network card chip, the special wireless direct control channel of realizing.The two realizes the control to wireless bottom hardware jointly.AP/STA WiFi Time Service unit (Area Time service) comprises local high-resolution timer (Local High Resolution Timer), precise synchronization service unit (High Resolution Ticker Sync), these modules provide unified high accuracy relative time for the AP/STA in wireless zone.AP/STA is wireless adjustment Transaction Service unit (Command Execute Daemon) provides affairs type service for all wireless adjustment.AP radio unit (Broadcast Daemon) and STA listen to unit (Listen Daemon) and provide efficient exchange channels for WiFi.
Every AP/STA operations such as AP/STA dispatch service unit (Schedule Service Daemon) is parameter adjustment provide kernel scheduling service.Wireless parameter is collected service unit (WiFi Area Information Collection) service of periphery wireless environment parameter collection is provided.CSU (Channel Service Unit), bandwidth service unit (Bandwidth Service Unit), power saving service unit (Power Saver Service Unit) etc. are every wireless parameter corresponding with service unit of controlling, adjusting.
In an embodiment of the present invention, the wireless channel selecting method of uninterrupted communication comprises the steps:
After step S1:AP/STA starts, by the scheduling of dispatch service unit, AP carries out time service by the STA that is attached thereto checking in WiFi network, sets up unified high accuracy relative time service in wireless zone;
Step S2:AP periodically surveys and analyzes periphery wireless environment feature, coordinates the traffic statistics result of Local wireless network, and relevant wireless parameter is adjusted;
The flow of transactions that step S3:AP starts wireless parameter broadcast, adjusts, verifies, STA coordinates AP, synchronously completes local wireless parameter adjustment.
Concrete, in above-mentioned steps,
Step S1 further comprises:
Step S11: initialization and the foundation of wireless basis driving and wireless direct control channel.
After wireless aps/STA starts, first complete wireless basis and drive relevant various standard initial work; Direct control channel completes privately owned parameter and interface initialization, need to activate especially AP/STA and hold wireless adjustment Transaction Service unit, split-second precision service unit and WIFI Time Service unit.
Step S12: the foundation of wireless zone split-second precision service.
Split-second precision service unit completes following operation after activating in order, and for AP/STA provides service time calibration, its concrete steps are as follows:
AP end obtains by local zone time source the relative time standard that real-time time or available machine time adopt as the time service of this wireless zone;
AP periodically (as 3600 seconds) is broadcasted and carries out time service to all STA by heartbeat (Beacon) bag of expansion;
STA listens to time service order and after the time, calibrates local relative time, and by extended wireless, sends packet radio to be sent in buffering and pass time service result back, if be empty in wireless transmission buffering, has initiatively built wireless direct packets transmission;
AP receives the time service result that STA beams back, and calculates without wire delay, with reference to current wireless communication traffic, judges that whether time service is effective; If certain STA time service overlong time, repeatedly time service in the overtime scope of packet radio; As found, still have the STA can not be by time service, by AP outside API(external interface) give a warning;
STA, by time service and for first, starts inner timer service.
In above-mentioned steps S2, periodically carry out wireless environment analysis, wireless channel conditions analysis, and start Radio Parameter Adjustment flow process, specific as follows:
According to the scheduling of WIFI Time Service unit, by wireless direct control channel, wireless parameter is collected service unit can constantly collect every content that Radio Parameter Adjustment is relevant.Mainly comprise: respectively tenability and the current network traffics of wireless network of the channel of the STA by authentication, channel size, wireless burst pattern, wireless huge bag etc. in the distribution situation of the quantity of other wireless networks that each wireless channel of AP periphery occurs and signal strength signal intensity, the wide wireless channel of other wireless networks of AP periphery (40Mhz), wireless network.
The information of collecting can provide to wireless-modulated Transaction Service unit, and wireless-modulated Transaction Service unit can start or keep Radio Parameter Adjustment accordingly.In wireless channel is adjusted, congested if current wireless channel occurs especially, there is more excellent channel (other wireless network quantity and its signal strength signal intensity in main reference channel), can start and adjust channel to the operation of preferred channels.
In above-mentioned steps S3, because wireless network in the whole process of parameter adjustment is in continuous communication process, require current communication not to be impacted, therefore all STA and AP must synchronously complete Radio Parameter Adjustment, mainly by high-resolution timer, complete.Simultaneously whole parameter adjustment process is transaction, or whole success, or auto back is rolled to raw parameter, guarantees that wireless telecommunications are unaffected.
The flow of transactions of wireless parameter broadcast, adjustment, checking is specific as follows:
AP is wrapped and is notified all STA start-up parameter to adjust flow process by Beacon, and the description (as channel adjustment, by the preferred channels number being adjusted to) of parameter adjustment is provided;
STA reports the ability (as channel adjustment scope) of self parameter correlation, gives security especially and can carry out the relative time of parameter adjustment;
The parameter adjustment ability of AP checking STA, gets each STA simultaneously and reports the maximum in can the relative time of complete operation, with reference to each STA without wire delay, the relative time of executable operations is proposed;
AP is broadcast to all STA by Beacon expanding packet by the relative time of the particular content of this parameter adjustment and executable operations;
STA receives after this operation particular content, confirms and notify AP; If confirm unsuccessfully, to AP, submit to and confirm failure information, and failure cause;
AP obtains, after the confirmation of all STA, by broadcast, starting this operation; If still have STA to confirm unsuccessfully, to adjust according to failure cause, or cancel this adjustment;
AP/STA receives and starts after this operation information, and timer is set, and in the time of implementation of consulting, by wireless direct control channel, completes this operation; And submit successful information to;
The successful information that AP checking is received, completes this operation.
After above-mentioned steps S3, further comprise step S4: verify and complete parameter adjustment transaction.
AP, after completing parameter adjustment, still can verify the result of parameter adjustment by collecting the mode of the wireless guiding of STA, as checking whether all known STA all Correctly adjust to optimum channel.If be proved to be successful, finished the transaction of this parameter adjustment, and notify all STA EOs.Otherwise AP notifies all STA operation failures, AP and STA all receive failure information or overtime after carry out rolling back action, wireless parameter is rearranged into initial value, and finishes this parameter adjustment.
In the process of above-mentioned Radio Parameter Adjustment, AP/STA communication realizes by heartbeat packet, can ongoing wireless telecommunications not impacted and be postponed; All parameter adjustments and checking all complete in limited AP heartbeat packet, and because Beacon inter-packet gap is generally 100ms, for realizing the operation of AP/STA synchronous synergetic, AP and STA have set up unified split-second precision source, and periodic calibration; Take split-second precision source as basis, set up unified timer, all parameter adjustment things, under the control of AP/STA dispatch service unit, the ticket reserving time starts, and finishes at the appointed time, submits execution result to; The result of parameter adjustment, verifies by heartbeat packet equally, can not produce any added flow.
In sum, adopt the wireless channel selecting method of uninterrupted communication of the present invention, AP monitors network environment in real time, do not affecting under the prerequisite of wireless network communication, the variation of STA or AP around coordinating, adjust the network parameter of self, make all the time self network in optimum state, can fine solution prior art in network parameter configuration can not coordinate variation, the wireless network variation of wireless environment can cause long-time suspension, Radio Resource by problems such as wastes in a large number.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. a wireless channel selecting method for uninterrupted communication, it,, for completing the scheme to WIFI application AP and STA channel adjustment, is characterized in that comprising,
After step S1:AP/STA starts, AP carries out time service by the STA that is attached thereto checking in WiFi network, sets up unified high accuracy relative time service in wireless zone;
Step S2:AP periodically surveys and analyzes periphery wireless environment feature, coordinates the traffic statistics result of Local wireless network, and relevant wireless parameter is adjusted;
The flow of transactions that step S3:AP starts wireless parameter broadcast, adjusts, verifies, STA coordinates AP, synchronously completes local wireless parameter adjustment.
2. the wireless channel selecting method of uninterrupted communication according to claim 1, is characterized in that, further comprises
Step S4: verify and complete parameter adjustment transaction.
3. the wireless channel selecting method of uninterrupted communication according to claim 1, is characterized in that, step S1 further comprises
Step S11: initialization and the foundation of wireless basis driving and wireless direct control channel;
Step S12: the foundation of wireless zone split-second precision service.
4. the wireless channel selecting method of uninterrupted communication according to claim 3, is characterized in that,
Step S12 further comprises:
AP end obtains by local zone time source the relative time standard that real-time time or available machine time adopt as the time service of this wireless zone;
AP periodically carries out time service by the heartbeat packet of expansion to all STA broadcast;
STA listens to time service order and after the time, calibrates local relative time, and passes time service result back;
AP receives the time service result that STA beams back, and calculates without wire delay, with reference to current wireless communication traffic, judges that whether time service is effective; If certain STA time service overlong time, repeatedly time service in the overtime scope of packet radio; As found, still have STA by time service, by the outside API of AP, not give a warning;
STA, by time service and for first, starts inner timer service.
5. the wireless channel selecting method of uninterrupted communication according to claim 1, it is characterized in that, in step S2, AP periphery wireless environment feature comprises: respectively tenability and the current network traffics of wireless network of the channel of the STA by authentication, channel size, wireless burst pattern, wireless huge bag etc. in the distribution situation of the quantity of other wireless networks that each wireless channel of AP periphery occurs and signal strength signal intensity, the wide wireless channel of other wireless networks of AP periphery, wireless network.
6. the wireless channel selecting method of uninterrupted communication according to claim 1, is characterized in that,
The flow of transactions of wireless parameter broadcast, adjustment, checking is specific as follows:
AP notifies all STA start-up parameter to adjust flow process by heartbeat packet, and the description of parameter adjustment is provided;
STA reports the ability of self parameter correlation, gives security especially and can carry out the relative time of parameter adjustment;
The parameter adjustment ability of AP checking STA, gets each STA simultaneously and reports the maximum in can the relative time of complete operation, with reference to each STA without wire delay, the relative time of executable operations is proposed;
AP is broadcast to all STA by heartbeat packet by the relative time of the particular content of this parameter adjustment and executable operations;
STA receives after this operation particular content, confirms and notify AP; If confirm unsuccessfully, to AP, submit to and confirm failure information, and failure cause;
AP obtains, after the confirmation of all STA, by broadcast, starting this operation; If still have STA to confirm unsuccessfully, to adjust according to failure cause, or cancel this adjustment;
AP/STA receives and starts after this operation information, and timer is set, and completes this operation, and submit successful information in the time of implementation of consulting by wireless direct control channel;
The successful information that AP checking is received, completes this operation.
7. the wireless channel selecting method of uninterrupted communication according to claim 6, is characterized in that, all parameter adjustments and checking all complete in limited AP heartbeat packet.
8. the wireless channel selecting method of uninterrupted communication according to claim 1, is characterized in that, AP/STA communication realizes by heartbeat packet.
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| CN104185224A (en) * | 2014-08-15 | 2014-12-03 | 深圳市同洲电子股份有限公司 | Wifi chip and control method during coexistence of station (STA) mode and access point (AP) mode |
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