CN103686796B - Wireless channel selection method with uninterruptible communication - Google Patents
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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, the wireless channel selecting method of more particularly, to a kind 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, especially after WiFi standard evolves to 802.11n highest in a large number and can support 300Mbps, the resource of frequency range becomes very nervous.
Especially in residential quarter or part public arena, small range space occurs（Diameter 100M）A large amount of wireless apss（Access Point, no
Line focus）Coexist, and these AP are limited by routine techniquess it is impossible to the channel of enough dynamic adjustment itself, bin width, wireless
The contents such as burst parameter, economize on electricity, cause wireless telecommunications heavy congestion, speed, delay severe exacerbation, band segment etc. is wireless simultaneously
Resource is but wasted and cannot use.
Current wireless technology allows AP to detect periphery channel occupancy situation when initial starting up, and automatically selects more idle
Multi-channel operation, but there is obvious defect in this function, be mainly manifested in：
1. no longer there is the function of adjustment channel it is impossible to adjust WiFi net with the change of periphery wireless environment after AP starts
The parameter of network makes it be operated in optimum state；
2. any wireless parameter modification of AP, is required for STA（Station, access website）The wireless network of equipment is grown
Time（More than 30 seconds）Cut off, reconnect, this carries out Stream Media Application in STA equipment（As video, audio frequency）, and not Zhi Chichong
It is unacceptable during the service of examination.
With the popularization of wireless city and family wireless network, smart mobile phone etc. supports the increase of the mobile device of WiFi, right
Make full use of existing radio band resource, the demand improving wireless telecommunications quality is more and more urgent.
Therefore, the many separate networks small range space how solving current WIFI network appearance coexists, and causes wireless congestion
Simultaneously Radio Resource be wasted, the problem of the defect of communication quality degradation, it has also become the current technical problem being badly in need of solving.
Content of the invention
In order to solve the problems referred to above of prior art, the present invention provides a kind of wireless channel selecting party of uninterrupted communication
Method, the many separate networks small range space being occurred with solving current WIFI network coexists, and causes wireless congestion Radio Resource simultaneously
It is wasted, the defect of communication quality degradation.
A kind of wireless channel selecting method of uninterrupted communication, during it is used for completing WIFI is applied, AP and STA channel is adjusted
Whole scheme, it includes：
Step S1：After AP/STA starts, the STA being attached thereto checking into WiFi network is carried out time service by AP, sets up no
Unified high accuracy relative time service in line region；
Step S2：AP periodically detects and analysis periphery wireless environment feature, the flow system of cooperation Local wireless network
Meter result, is adjusted to related wireless parameter；
Step S3：AP starts broadcast radio parameters, adjustment, the flow of transactions of checking, and STA coordinates AP, synchronously completes local
Radio Parameter Adjustment.
Wherein, the wireless channel selecting method of described uninterrupted communication further includes step S4：Verify and complete parameter
Adjustment issued transaction.
Wherein, step S1 further includes
Step S11：Wireless basis drive and the wirelessly initialization of direct control channel and foundation；
Step S12：The foundation of wireless zone split-second precision service.
Wherein, step S12 further includes：
AP end by local zone time source obtain real-time time or available machine time as the time service of this wireless zone adopt relative
Time standard；
AP carries out time service periodically through the heartbeat packet of extension 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 no wire delay, whether judges time service with reference to currently wireless communication traffic
Effectively；If certain STA time service overlong time, repeatedly time service in packet radio time-out scope；As found still have STA can not pass through
Time service, then given a warning by the outside API of AP；
STA passes through time service and the timer service for first, within startup.
In step S2, AP periphery wireless environment feature includes：Other wireless networks that each wireless channel of AP periphery occurs
Respectively pass through certification in the distribution situation of quantity and other wireless network width wireless channels of signal intensity, AP periphery, wireless network
The current network flow of the channel of STA, channel size, wireless burst pattern, the wirelessly tenability of huge bag etc. and wireless network
Amount.
Wherein, broadcast radio parameters, adjustment, checking flow of transactions specific as follows：
AP notifies all STA start-up parameter to adjust flow process by heartbeat packet, and provides the description of parameter adjustment；
STA reports the related ability of inherent parameters, especially provides and guarantees to carry out the relative time of parameter adjustment；
AP verifies the parameter adjustment ability of STA, takes each STA to report the maximum in the relative time that can complete to operate simultaneously
Value, with reference to the no wire delay of each STA, proposes the relative time of execution operation；
AP is broadcasted the relative time of the particular content of this parameter adjustment and execution operation to all by heartbeat packet
STA；
After STA receives this operation particular content, confirm and notify AP；If confirming unsuccessfully, to submit to AP and confirm unsuccessfully
Information, and failure cause；
After AP obtains the confirmation of all STA, this operation is started by broadcast；If still having STA to confirm unsuccessfully, root
It is adjusted according to failure cause, or cancel this adjustment；
After AP/STA receives this operation information of startup, intervalometer is set, passes through in the execution time consulted wirelessly direct
Control passage completes this operation, and submits successful information to；
The successful information that AP checking receives, completes this operation.
Wherein, all parameter adjustments and checking all complete in limited AP heartbeat packet.
Wherein, AP/STA communication is realized by heartbeat packet.
Compared with prior art, using the wireless channel selecting method of the uninterrupted communication of the present invention, AP is in real time to net
Network environment is monitored, and on the premise of not affecting wireless network communication, around cooperation, the change of STA or AP, adjusts itself
Network parameter, makes own net be in optimum state all the time, and can solve network parameter configuration in prior art very well can not join
The problems such as change of conjunction wireless environment, wireless network change can cause long-time suspension, Radio Resource to be wasted in a large number.
Brief description
Fig. 1 is the function structure chart of wireless client STA in the uninterrupted wireless channel selecting method communicating of the present invention.
Fig. 2 is the function structure chart of wireless client AP in the uninterrupted wireless channel selecting method communicating of the present invention.
Specific embodiment
As depicted in figs. 1 and 2, in the AP/STA framework of embodiments of the invention, AP/STA basis drives（Basic
Driver）For the original driving of former AP or STA, AP/STA direct control channel（Direct Control Channel）According to
The type of wireless network card chip, the wireless direct control channel especially realized.The two realizes the control to wireless bottom hardware jointly
System.AP/STA WiFi Time Service unit（Area Time service）Including local high-resolution timer（Local High
Resolution Timer）, precise synchronization service unit（High Resolution Ticker Sync）, these moulds
Block provides unified high accuracy relative time for the AP/STA in wireless zone.AP/STA wirelessly adjusts Transaction Service unit
（Command Execute Daemon）There is provided transactional service for all wireless adjustment.AP radio unit（ Broadcast
Daemon）Listen to unit with STA（Listen Daemon）There is provided efficient exchange channels for WiFi.
AP/STA dispatch service unit（Schedule Service Daemon）For the items AP/STA behaviour such as parameter adjustment
Make to provide kernel scheduling service.Wireless parameter collects service unit（WiFi Area Information Collection）There is provided
Periphery wireless environment parameter collection services.CSU（Channel Service Unit）, bandwidth service unit
（Bandwidth Service Unit）, power saving service unit（Power Saver Service Unit）Controlled Deng for items
System, the wireless parameter corresponding with service unit of adjustment.
In an embodiment of the present invention, the wireless channel selecting method of uninterrupted communication comprises the steps：
Step S1：After AP/STA starts, by the scheduling of dispatch service unit, AP will be attached thereto into WiFi network and test
The STA of card carries out time service, sets up unified high accuracy relative time service in wireless zone；
Step S2：AP periodically detects and analysis periphery wireless environment feature, the flow system of cooperation Local wireless network
Meter result, is adjusted to related wireless parameter；
Step S3：AP starts broadcast radio parameters, adjustment, the flow of transactions of checking, and STA coordinates AP, synchronously completes local
Radio Parameter Adjustment.
Specifically, in above-mentioned steps,
Step S1 further includes：
Step S11：Wireless basis drive and the wirelessly initialization of direct control channel and foundation.
After wireless apss/STA starts, complete wireless basis first and drive related various standard initialization work；Directly control
Passage processed completes privately owned parameter and interface initialization it is accordingly required in particular to activation AP/STA end wirelessly adjusts Transaction Service unit, high-precision
Degree Time Service unit and WIFI Time Service unit.
Step S12：The foundation of wireless zone split-second precision service.
After the activation of split-second precision service unit, complete in order to operate as follows, provide time calibration service for AP/STA,
It comprises the following steps that：
AP end by local zone time source obtain real-time time or available machine time as the time service of this wireless zone adopt relative
Time standard；
AP is periodically（As 3600 seconds）Heart beating by extension（Beacon）Wrap and carry out time service to all STA broadcast；
STA listens to time service order and after the time, calibrates local relative time, and is sent in buffering by extended wireless
Packet radio to be sent passes time service result back, if being empty in wireless transmission buffering, actively having built wireless guiding bag and having sent out
Send；
AP receives the time service result that STA beams back, and calculates no wire delay, whether judges time service with reference to currently wireless communication traffic
Effectively；If certain STA time service overlong time, repeatedly time service in packet radio time-out scope；As found still have STA can not pass through
Time service, then by the outside API of AP（External interface）Give a warning；
STA passes through time service and the timer service for first, within startup.
In above-mentioned steps S2, periodically carry out wireless environment analysis, wireless channel conditions analysis, and start wireless parameter
Adjustment flow process, specific as follows：
According to the scheduling of WIFI Time Service unit, by wireless direct control channel, wireless parameter collects service unit
The related every content of Radio Parameter Adjustment can constantly be collected.Main inclusion：Other of AP periphery each wireless channel appearance are wireless
The quantity of network and other wireless network width wireless channels of signal intensity, AP periphery（40Mhz）Distribution situation, in wireless network
Respectively by the channel of STA of certification, channel size, wireless burst pattern, the wirelessly tenability of huge bag etc. and wireless network
Current network traffics.
The information collected can be provided to wireless-modulated Transaction Service unit, and wireless-modulated Transaction Service unit can open accordingly
Move or keep Radio Parameter Adjustment.Especially in wireless channel adjustment, if congestion in current radio channel, there is more excellent channel
（Other wireless network quantity and its signal intensity in Primary Reference channel）, then adjustment channel can be started to the behaviour of preferred channels
Make.
In above-mentioned steps S3, because in the whole process of parameter adjustment wireless network be in continuous communication process it is desirable to
Current communications are not impacted, therefore all STA and AP must synchronously complete Radio Parameter Adjustment, mainly pass through high precision timing
Device completes.Whole parameter tuning process is issued transaction simultaneously, or overall success, or be automatically rolled back to raw parameter it is ensured that
Wireless telecommunications are unaffected.
Broadcast radio parameters, adjustment, checking flow of transactions specific as follows：
AP notifies all STA start-up parameter to adjust flow process by Beacon bag, and provides the description of parameter adjustment（As channel
Adjustment, by adjust to preferred channels number）；
STA reports the related ability of inherent parameters（As channel adjustment scope）, especially provide and guarantee to adjust into line parameter
Whole relative time；
AP verifies the parameter adjustment ability of STA, takes each STA to report the maximum in the relative time that can complete to operate simultaneously
Value, with reference to the no wire delay of each STA, proposes the relative time of execution operation；
AP by Beacon expanding packet by the particular content of this parameter adjustment and execution operation relative time broadcast to
All STA；
After STA receives this operation particular content, confirm and notify AP；If confirming unsuccessfully, to submit to AP and confirm unsuccessfully
Information, and failure cause；
After AP obtains the confirmation of all STA, this operation is started by broadcast；If still having STA to confirm unsuccessfully, root
It is adjusted according to failure cause, or cancel this adjustment；
After AP/STA receives this operation information of startup, intervalometer is set, passes through in the execution time consulted wirelessly direct
Control passage completes this operation；And submit successful information to；
The successful information that AP checking receives, completes this operation.
After above-mentioned steps S3, further include step S4：Verify and complete parameter adjustment issued transaction.
AP, after completing parameter adjustment, still can be carried out to the result of parameter adjustment by way of collecting the wireless guiding of STA
Checking, such as verifies whether that all known STA are properly and adjusts to optimum channel.If be proved to be successful, terminate this
The issued transaction of parameter adjustment, and notify all STA operations to terminate.Otherwise AP notifies all STA operation failures, AP and STA is equal
Carry out rolling back action after receiving failure information or time-out, wireless parameter be rearranged into initial value, and terminate this subparameter adjusting
Whole.
During above-mentioned Radio Parameter Adjustment, AP/STA communication is realized by heartbeat packet, will not be to carrying out
Wireless telecommunications impact and postpone；All parameter adjustments and checking all complete, because of Beacon in limited AP heartbeat packet
Inter-packet gap is generally 100ms, and for realizing the operation of AP/STA synchronous synergetic, AP and STA establishes unified split-second precision source, and
Periodic calibration；Based on split-second precision source, set up unified intervalometer, all parameter adjustment things, dispatch clothes in AP/STA
Under the control of business unit, the ticket reserving time starts, and terminates in the stipulated time, submits implementing result to；The result of parameter adjustment, equally
Verified by heartbeat packet, any added flow will not be produced.
In sum, using the wireless channel selecting method of the uninterrupted communication of the present invention, AP enters to network environment in real time
Row monitoring, on the premise of not affecting wireless network communication, around cooperation, the change of STA or AP, adjusts the network parameter of itself,
All the time make own net be in optimum state, network parameter configuration in prior art can be solved very well and can not coordinate wireless environment
Change, wireless network change be the problems such as can cause long-time suspension, Radio Resource to be wasted in a large number.
Above content is to further describe it is impossible to assert with reference to specific preferred implementation is made for the present invention
Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of present inventive concept, some simple deduction or replace can also be made, all should be considered as belonging to the present invention's
Protection domain.
Claims (8)
1. a kind of wireless channel selecting method of uninterrupted communication, it is used for completing to AP and STA channel adjustment in WIFI application
Scheme it is characterised in that include,
Step S1：After AP/STA starts, the STA being attached thereto checking into WiFi network is carried out time service by AP, sets up radio zone
Unified high accuracy relative time service in domain；
Step S2：AP periodically detects and analysis periphery wireless environment feature, the traffic statistics knot of cooperation Local wireless network
Really, related wireless parameter is adjusted；
Step S3：AP starts broadcast radio parameters, adjustment, the flow of transactions of checking, and STA coordinates AP, synchronously completes local wireless
Parameter adjustment.
2. the wireless channel selecting method of uninterrupted communication according to claim 1 is it is characterised in that further include
Step S4：Verify and complete parameter adjustment issued transaction.
3. the wireless channel selecting method of uninterrupted communication according to claim 1 is it is characterised in that step S1 is further
Including
Step S11：Wireless basis drive and the wirelessly initialization of direct control channel and foundation；
Step S12：The foundation of wireless zone split-second precision service.
4. uninterrupted communication according to claim 3 wireless channel selecting method it is characterised in that
Step S12 further includes：
AP end obtains, by local zone time source, the relative time that real-time time or available machine time adopt as the time service of this wireless zone
Standard；
AP carries out time service periodically through the heartbeat packet of extension 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 no wire delay, judges whether time service has with reference to currently wireless communication traffic
Effect；If certain STA time service overlong time, repeatedly time service in packet radio time-out scope；As found still have STA can not pass through to award
When, then given a warning by the outside API of AP；
STA passes through time service and the timer service for first, within startup.
5. the wireless channel selecting method of uninterrupted communication according to claim 1 is it is characterised in that in step S2, AP
Periphery wireless environment feature includes：The quantity of other wireless networks and signal intensity, AP week that each wireless channel of AP periphery occurs
In the distribution situation of other wireless network width wireless channels of side, wireless network respectively by the channel of STA of certification, channel size,
Wireless burst pattern, the wirelessly tenability of huge bag and the current network traffics of wireless network.
6. uninterrupted communication according to claim 1 wireless channel selecting method it is characterised in that
Broadcast radio parameters, adjustment, checking flow of transactions specific as follows：
AP notifies all STA start-up parameter to adjust flow process by heartbeat packet, and provides the description of parameter adjustment；
STA reports the related ability of inherent parameters, especially provides and guarantees to carry out the relative time of parameter adjustment；
AP verifies the parameter adjustment ability of STA, takes each STA to report the maximum in the relative time that can complete to operate simultaneously,
With reference to the no wire delay of each STA, the relative time of execution operation is proposed；
AP is broadcasted the relative time of the particular content of this parameter adjustment and execution operation to all STA by heartbeat packet；
After STA receives this operation particular content, confirm and notify AP；If confirming unsuccessfully, to submit to AP and confirm failure information,
And failure cause；
After AP obtains the confirmation of all STA, this operation is started by broadcast；If still there being STA to confirm unsuccessfully, according to mistake
Lose reason to be adjusted, or cancel this adjustment；
After AP/STA receives this operation information of startup, intervalometer is set, passes through wirelessly directly to control in the execution time consulted
Passage completes this operation, and submits successful information to；
The successful information that AP checking receives, completes this operation.
7. the wireless channel selecting method of uninterrupted communication according to claim 6 is it is characterised in that all parameter adjustments
All complete in limited AP heartbeat packet with checking.
8. the wireless channel selecting method of uninterrupted communication according to claim 1 is it is characterised in that AP/STA communication is logical
Cross heartbeat packet to realize.
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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 |
| CN109831789A (en) * | 2019-02-25 | 2019-05-31 | 深圳市理邦精密仪器股份有限公司 | Method, apparatus, terminal, system and the medium of network channel adjustment |
| CN112615692B (en) * | 2020-11-26 | 2022-07-12 | 新华三技术有限公司 | Time synchronization method and device for traffic statistics and traffic analysis system |
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| CN102497640A (en) * | 2011-12-09 | 2012-06-13 | 西安电子科技大学 | A Dynamic Allocation Method of Broadband Channels in Dense Local Area Network Environment |
| CN102781115A (en) * | 2012-08-03 | 2012-11-14 | 西安电子科技大学 | Automatic channel selection method based on channel order in dense wireless fidelity (WiFi) |
| CN103179663A (en) * | 2003-12-01 | 2013-06-26 | 美商内数位科技公司 | Method for an access point to select a job channel and an access point for selecting a job channel |
| CN103237355A (en) * | 2013-04-25 | 2013-08-07 | 京信通信系统（中国）有限公司 | Method and system for automatically distributing wireless communication channels |
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| CN105916210B (en) * | 2010-07-13 | 2019-07-19 | 联发科技（新加坡）私人有限公司 | Wireless resource allocation methods, wireless communications method and cordless communication network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103179663A (en) * | 2003-12-01 | 2013-06-26 | 美商内数位科技公司 | Method for an access point to select a job channel and an access point for selecting a job channel |
| CN102497640A (en) * | 2011-12-09 | 2012-06-13 | 西安电子科技大学 | A Dynamic Allocation Method of Broadband Channels in Dense Local Area Network Environment |
| CN102781115A (en) * | 2012-08-03 | 2012-11-14 | 西安电子科技大学 | Automatic channel selection method based on channel order in dense wireless fidelity (WiFi) |
| CN103237355A (en) * | 2013-04-25 | 2013-08-07 | 京信通信系统（中国）有限公司 | Method and system for automatically distributing wireless communication channels |
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