CN109510675A - A kind of automatic channel selection method of multiple spot AP - Google Patents
A kind of automatic channel selection method of multiple spot AP Download PDFInfo
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- CN109510675A CN109510675A CN201811579567.3A CN201811579567A CN109510675A CN 109510675 A CN109510675 A CN 109510675A CN 201811579567 A CN201811579567 A CN 201811579567A CN 109510675 A CN109510675 A CN 109510675A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
Abstract
The invention discloses the automatic channel selection methods of multiple spot AP a kind of, mainly include following operation: step a:Master AP collects the wireless neighbor information that AP is disposed in current environment first, then establishes neighborhood table；Step b:AP channel estimating is successively adjusted the channel of legal AP using channel predistribution and dynamics of channels distribution.The present invention obtains neighbor AP information by way of radio scan, then it is reported to management AP, it can go to establish the neighborhood table of deployment AP according to the neighbor information reported, then management AP can be according to neighborhood table and current radio environment information, all AP for going assessment to dispose, and reasonable channel is distributed for it.Automatic channel selection method reduces the interference between deployment AP through the invention, improves the handling capacity of radio resource in current environment, and simplify the work of deployment personnel, improves efficiency.
Description
Technical field
The invention belongs to communication technique field more particularly to communication channel selection and administrative skills.
Background technique
With the extensive use of mobile device, Wi-Fi technology is rapidly progressed, and almost has become standard configuration,
Wi-Fi brings great convenience for people.
Wi-Fi equipment is communicated using radio wave, can be reflected when radio wave encounters object, therefore is existed when propagation more
Diameter problem.It is as a result usually very due to not apparent entity boundary and when environment exists much with the wireless signal of frequency
What hardly possible was expected.Since 802.11 agreements provide, wireless device can only be maintained in specific frequency range when communicating, so ought wirelessly set
When standby very much, there will be the case where multiple equipment shares a frequency range.Although having collision-avoidance mechanism can in 802.11 agreements
To greatly reduce the interference of signal between different radio equipment, but due to synchronization, same channel only allows an equipment to make
With decreasing so as to cause bandwidth, frequency spectrum resource cannot fill so the wireless device using same channel must be waited mutually
Divide and uses.
In reality in order to solve this problem, professional is needed to measure using handheld device to actual environment, so
It is configured afterwards according to channel of the result to AP.But it is relatively elaborate and time-consuming when the AP disposed in environment is more, and work as
Environment is not adapted dynamically when changing.The present invention will propose that the automatic channel selection algorithm between more AP, this algorithm can be right thus
The AP channel of deployment carries out the reasonable planning of dynamic, avoids adjacent AP using identical channel, as far as possible so as to more sufficiently
Use frequency spectrum resource.
Summary of the invention
It is an object of that present invention to provide a kind of automatic channel selection method based on multiple spot AP, in order to can be reduced deployment AP it
Between interference, improve current environment in radio resource handling capacity, and simplify deployment personnel work, the technical side improved efficiency
Case.
In order to achieve the above-mentioned object of the invention, the automatic channel selection method of a kind of multiple spot AP of the invention, mainly include with
Lower operation: step a:Master AP collects the wireless neighbor information that AP is disposed in current environment first, then establishes neighborhood
Table；Step b:AP channel estimating is successively adjusted the channel of legal AP using channel predistribution and dynamics of channels distribution.
Preferably, channel predistribution includes: to select an idle channel according to the AP sequence in neighborhood table.
Preferably, channel predistribution includes: to select the smallest channel of SNR when not having idle channel optional time.
Preferably, after the completion of channel predistribution includes: all AP assessments, check that AP is sent out if needing to carry out channel adjustment
Adjustment is sent to order.
Preferably, dynamics of channels assessment includes: that Slave AP according to neighborhood is divided into no neighbours pass by Master AP
The different subgroups of system.
Preferably, dynamics of channels assessment includes: bss in wireless environment, the parameter selection three of chn load, noise tri-
It is worth all smaller channel.
Preferably, dynamics of channels assessment includes: and sends channel setting command channel is arranged to the Slave AP.
Preferably, in above-mentioned steps b, before the channel predistribution of an AP is completed, the dynamics of channels of this AP is assessed
Algorithm will not be run.
Preferably, in above-mentioned steps a, neighbor AP information is obtained by radio scan mode, is reported to Master AP.
Preferably, in above-mentioned steps a, the AP neighborhood table is created by Master AP.
The automatic channel selection method of multiple spot AP provided by the invention a kind of, can be to the channel for disposing AP in current environment
Reasonable distribution is carried out, reduces interference, improves handling capacity, it is no longer necessary to dispose the channel for removing adjustment AP one by one of personnel, letter
Change work, improves efficiency.
Detailed description of the invention
Fig. 1 is multiple spot AP communication architecture schematic diagram in the specific embodiment of the invention；
Fig. 2 is the schematic diagram of neighbor table relationship in a specific embodiment of the invention；
Fig. 3 is the flow chart of channel predistribution in the specific embodiment of the invention；
Fig. 4 is dynamics of channels assessment algorithm flow chart in the specific embodiment of the invention.
Specific embodiment
General principles: the present invention obtains the information of wireless neighbor AP by way of radio scan, then reports
Management AP is given, it can establish neighborhood table according to the neighbor information that reports, and then managing AP according to neighborhood table and can work as
Preceding radio environment information goes to assess all AP, and distributes reasonable channel for it.
The present invention is described in further detail with reference to the accompanying drawings and examples.It can be understood that described at this time
Specific embodiment be used only for explaining the present invention rather than limiting the invention.It also should be noted that for convenience
It describes, the relevant part of the present invention is only illustrated in attached drawing rather than entire infrastructure.
Fig. 1 is multiple spot AP communication architecture schematic diagram in the specific embodiment of the invention.It include one according to the figure
Master AP and multiple Slave AP.Wherein, 1 expression AP obtains the information of oneself neighbor AP by radio scan；2 indicate
Slave AP can be reported to the neighbor information received management AP, i.e. Master AP；3 indicate Master AP according to neighbor information
Neighbor table is established, and AP is assessed according to current environment wireless messages；4 expression Master AP can be needed to adjust channel
Slave AP send channel switching command.
In the specific embodiment of the invention, entire automatic channel selection function is broadly divided into following three Xiang Gongneng: wireless adjacent
Information collection, the foundation of neighbor table relationship, the assessment of the channel AP are occupied, these functions will be described in detail below.
Wireless neighbor information is collected: wireless neighbor information, which is collected, to be realized by sending probe request frame.
Neighborhood table is established: the Master AP neighbor information that Slave AP is reported based on the received creates neighborhood
Table.When creating AP neighborhood table, in order to guarantee the stabilization of neighborhood, neighborhood completion function is increased.Namely when
Neighbours A receives the message of neighbours B, but when neighbours B can not receive the message of neighbours A, receives the neighbours that A is reported in Master AP
When information, the SNR information of A can be calculated according to the current power and noise information of B, and the letter of neighbours A is added in the neighbours of B
Breath.If later B receives the neighbor information of A, the neighbor information specifically reported will use, and the neighbor information that front is compensated is gone
Fall.
Neighbor table establishment process mainly includes the following steps: carrying out radio scan one by one to all AP, it is each to obtain each AP
From adjacent neighborhood, and count neighbours' quantity of each AP；According to how much determinations of neighbours' quantity, wherein quantity is most
AP is first node AP, if having multiple neighbours' quantity identical at this time, just by the sequencing reported；Further compare first segment
Neighbours' quantity of point AP or so neighbours therefrom determines that the AP more than neighbours' quantity is second node AP；Until the institute of first node AP
There are neighbours to arrange to complete；Then according to neighbours' quantity from more to less arrange second node neighbours；Then the neighbour of third node is arranged
It occupies；It repeats above-mentioned comparison principle and successively determines that subsequent neighbours, each AP only occur primary in neighbor table.
Neighbor table is established by AP neighbours' quantity from more to few and neighborhood, is named for a simple deployed environment
The establishment process of bright neighbor table.Fig. 2 is the schematic diagram of neighbor table relationship in a specific embodiment of the invention.Referring to fig. 2, it is assumed that
Four AP are deployed in specific implementation environment, is AP1, AP2, AP3 and AP4 respectively, is closed according to the neighbours that radio scan obtains
System are as follows: AP1 neighbours have AP2；AP2 neighbours have AP1, AP3；AP3 neighbours have AP2, AP4；AP4 neighbours have AP3.
Establish the process of neighbor table are as follows: there are two neighbours, AP1 and AP4 there are a neighbours by AP2 and AP3, and first node is only
It can select AP2 and AP3.Assuming that choosing AP2, its neighbor AP 1 and AP3 are then seen, because of neighbours there are two AP3, second
A node is AP3.Then the neighbor AP 1 of AP2 is arranged, so AP1 is third node.It is over because the neighbours of AP2 arrange, so
The neighbours of AP3 are arranged afterwards, because its neighbor AP 2 arranged mistake, can only arrange AP4, so AP4 is the 4th section
Point.AP3 neighbours arrangement after the completion of, then arrange third node AP1 neighbours, the arranged completion of its neighbor AP 2, no
It needs to arrange, similarly arranges AP4, its neighbor AP 3 is arranged complete, does not need to arrange.So last neighbor table sequence is
AP2-AP3-AP1-AP4。
When AP channel estimating, sequentially each AP will be assessed according to this.Similarly other deployed environment neighbor tables
Foundation be also identical process.
AP channel estimating: the channel of AP is divided into channel predistribution algorithm and dynamics of channels assessment algorithm two parts.
After AP is powered on or after radio configuration modification, a secondary channel first is carried out to AP and pre-allocates assessment algorithm, it is all
AP all ran channel predistribution algorithm after, behind can just run dynamics of channels assessment algorithm.Hereafter if there is an AP in centre
It is new to be added, channel predistribution can be only carried out to this AP, after the completion of this AP predistribution, can just carry out dynamics of channels to all AP
Assessment algorithm.Channel predistribution assessment algorithm does not account for rogue AP, only assesses legal AP.Dynamics of channels assessment algorithm
The channel loading that can consider rogue AP is adjusted the channel of legal AP.
After channel pre-allocates function unlatching, Master AP establishes wireless neighborhood table according to the neighbor information of collection.
If the radio configuration of AP is without modification, it is primary that each AP only understands configurating channel.If all AP substantially can when starting simultaneously
Guarantee 10 minutes or so that completion can be configured, if the configuration of only one AP changes, other Slave AP will not be again
Configuration, only this AP is configured.Before the channel predistribution of an AP is completed, the dynamics of channels assessment algorithm of this AP
It will not run.
2.4G only uses chn1, and tri- channels of chn6, chn11,5G rejects DFS channel at present, and S20 will not be selected to believe
Road, selection principle are: according to the sequence of AP in neighborhood table, if as soon as an AP is free idle channel optional, believe according to the free time
Road sequence successively selects an idle channel；If optional without idle channel, the letter that farthest AP is used in its neighbour is just selected
Road, i.e. SNR are minimum.
The present invention program channel Pre-Evaluation process is exactly to arrange sequencing according to AP in neighbor table, successively selects first segment
Point AP, second node AP, third node AP etc. carry out assessment selection channel one by one.Wherein, it is specifically included in evaluation process:
Step S101: an assessment AP is selected from neighbor table.
Step S102: judging whether above-mentioned assessment AP is first node AP, judging result be it is yes, then go to step S103, it is no
Then go to step S104.
Step S103: sequentially selecting one from all idle channels, idle in the specific embodiment of the invention
Channel are as follows: chn1, chn6, chn11, then sequential selection chn1.
Whether step S104: judging in the left and right neighbor AP of the assessment AP busy channel, judging result be to turn
Step S105, judging result are otherwise to go to step S106.
Step S105: the channel that above-mentioned left and right neighbor AP occupies, one channel of sequential selection from idle channel are rejected.
Step S106: one channel of sequential selection directly in idle channel.
In the specific embodiment of the invention, AP is laid out as shown in Fig. 2, the process for selecting channel illustrates by taking 2.4G as an example.Root
According to the above-mentioned neighbor table sequence having built up: AP2, AP3, AP1, AP4 successively carry out channel estimating.Firstly evaluate first node
AP, i.e. AP2, since it is to assess for the first time, neighbours assess not yet, thus AP2 can from all idle channel chn1,
One is selected in chn6, chn11, can be selected as chn1 in order at this time.Then second node AP is assessed, i.e. assessment AP3, because
AP3 is the neighbours of AP2, and the channel of AP3 can only select one in chn6, chn11, select chn6 in order.When assessing AP1,
Because the neighbours of AP1 only have AP2, because AP2 selected channel chn1, then AP1 can be from chn6, and chn11 selects one, by suitable
Sequence selects chn6, when assessing AP4, because the neighbours of AP4 only have AP3, because AP3 has selected chn6, AP4 to can choose chn1
And chn11, chn1 is selected in order, so far, all AP evaluated completion, AP1(chn6)-AP2(chn1)-AP3(chn6)-
AP4(ch1).Appraisal procedure of the 5G channel similar to 2.4G channel.
Fig. 3 is the flow chart of channel predistribution in the specific embodiment of the invention.It can be seen that channel predistribution operation packet
Include following steps:
Step S201: neighbor information is collected, neighborhood table is established according to neighborhood and neighbours' number.
Step S202: an AP is selected to be assessed according to neighborhood table sequencing.
Step S203: selecting the smallest channel of SNR from idle channel or from the channel of oneself neighbor AP, if this
The channel of AP needs to adjust, and records, another AP is then selected to be assessed.
Step S204: after the completion of all AP assessments, just check whether AP needs to carry out channel adjustment, if there is AP needs to adjust
It is whole just to send adjustment order.
The present invention program channel Pre-Evaluation process is exactly to arrange sequencing according to AP in neighbor table, successively selects first segment
Point AP, second node AP, third node AP etc. carry out assessment selection channel one by one.Wherein, it is specifically included in evaluation process:
Step S301: an assessment AP is selected from neighbor table.
Step S302: judging whether above-mentioned assessment AP is free idle channel, judging result be it is yes, then go to step S303, otherwise
Go to step S304.
Step S303: sequentially selecting one from all idle channels, idle in the specific embodiment of the invention
Channel are as follows: chn1, chn6, chn11, then sequential selection chn1.
Step S304: judging whether assessment AP has a channel of minimum SNR according to neighbor AP, judging result be to turn to walk
Rapid S305, judging result are otherwise to go to step S306.
Step S305: the selection the smallest channel of SNR.
Step S306: assessment AP channel does not change.
In specific implementation, dynamics of channels assessment algorithm needs radio resource statistical information, and each AP can be obtained for every 1 minute
The busy situation of present channel, the statistics of the busy mainly duty ratio in channel.If present channel is busier, and oneself is gulped down
When the amount of spitting is less than 500kB/min, primary counting can be done, if stored count is greater than 8 times, will be obtained each in AP current environment
The radio resource situation of a channel, including bss, chn load, noise.2 minutes are divided between the acquisition of these information, Slave
AP can be sent to these information Master AP, for using when channel estimating.The busy of present channel is wherein detected, is to pass through
What the ratio of the transmitting-receiving clock and total clock of chip manufacturer statistics were calculated.The wherein detection of channel busy extent and each letter
The accuracy of the radio resource situation in road is the key that dynamics of channels assessment algorithm.It is provided according to agreement, channel busy extent
Detection presence can only detect the AP channel behaviour in service smaller than oneself bandwidth, such as oneself AP bandwidth is 80M, can detecte current
20M in environment, 40M, the AP of 80M can only detect 20M, 40M bandwidth is other similar, so such as if oneself only has 40M
Fruit, which wants best effect, can be set to maximum bandwidth.
Fig. 4 is dynamics of channels assessment algorithm flow chart in the specific embodiment of the invention.It can be seen that dynamics of channels is assessed
Algorithm steps include:
Step S401: neighbor information is collected, neighborhood table is established according to neighborhood and neighbours' number.
Step S402: an AP is selected to be assessed according to neighborhood table sequencing.
Step S403: it if subgroup belonging to this AP did not carry out channel adjustment, is just counted and is believed according to radio resource
Breath selects a channel for it, if this AP has relatively good channel optional, just records channel information, then assesses next
AP。
Step S404: after the completion of all AP assessments, just check whether AP needs to carry out channel adjustment, if there is AP needs to adjust
It is whole just to send adjustment order.
In the specific embodiment of the invention, dynamics of channels assesses every 10 clock operation once, and Master AP can be closed according to neighbours
System is divided into Slave AP different subgroups.Without neighborhood between different subgroups, two different buildings can be analogized to
The AP of middle deployment, the AP in a building are a subgroup, and the AP in another building belongs to another subgroup.In order not to allow
AP has a big fluctuation, and when assessment, each subgroup can only change the channel of an AP, and others can be waited and be assessed next time.
It is by the radio resource situation of each channel in AP current environment, bss, chn when dynamic evaluation channel
The parameter selection three of load, noise tri- is worth all smaller channel, if selection does not come out, the channel of this AP will not be into
Row modification, carry out the assessment of next AP, if a relatively good channel can be selected, will send channel setting command to
Channel can be arranged after receiving order in Slave AP, Slave AP.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.Those skilled in the art can manage
Solution, the present invention is not limited to the specific embodiments, are able to carry out various apparent variations, again for a person skilled in the art
New adjustment and substitution are without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, may be used also
To include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of automatic channel selection method of multiple spot AP, which is characterized in that the method includes following operations:
Step a:Master AP collects the wireless neighbor information that AP is disposed in current environment first, then establishes neighborhood table；
Step b:AP channel estimating is successively adjusted the channel of legal AP using channel predistribution and dynamics of channels distribution.
2. channel selecting method according to claim 1, which is characterized in that the channel predistribution includes: according to
AP sequence in neighborhood table, selects an idle channel.
3. channel selecting method according to claim 2, which is characterized in that the channel predistribution includes: free when not being
Idle channel optional time selects the smallest channel of SNR.
4. channel selecting method according to claim 3, which is characterized in that the channel predistribution includes: all AP
After the completion of assessment, check that AP sends adjustment order if needing to carry out channel adjustment.
5. channel selecting method according to claim 4, which is characterized in that the dynamics of channels assessment includes: described
Master AP is divided into Slave AP according to the neighborhood the different subgroups of not neighborhood.
6. channel selecting method according to claim 5, which is characterized in that the dynamics of channels assessment includes: wireless ring
The parameter selection three of bss in border, chn load, noise tri- is worth all smaller channel.
7. channel selecting method according to claim 6, which is characterized in that the dynamics of channels assessment includes: to send letter
Channel is arranged to the Slave AP in road setting command.
8. channel selecting method according to claim 7, which is characterized in that pre- in the channel of an AP in the step b
Before being assigned, dynamics of channels assessment algorithm will not be run.
9. channel selecting method according to claim 8, which is characterized in that in the step a, pass through radio scan mode
Neighbor AP information is obtained, the Master AP is reported to.
10. channel selecting method according to claim 9, which is characterized in that in the step a, the Master AP wound
Build the AP neighborhood table.
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| CN111510931A (en) * | 2020-01-02 | 2020-08-07 | 普联国际有限公司 | AP channel deployment method, device, equipment and system |
| CN111510931B (en) * | 2020-01-02 | 2023-05-12 | 普联国际有限公司 | AP channel deployment method, device, equipment and system |
| CN112511364A (en) * | 2020-03-15 | 2021-03-16 | 中兴通讯股份有限公司 | Time delay performance evaluation method and device and storage medium |
| WO2021184917A1 (en) * | 2020-03-15 | 2021-09-23 | 中兴通讯股份有限公司 | Time delay performance evaluation method and apparatus, and storage medium |
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