CN104703281A - Channel distributing method, channel distributing device and Wireless Local Area Network system - Google Patents

Channel distributing method, channel distributing device and Wireless Local Area Network system Download PDF

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Publication number
CN104703281A
CN104703281A CN201310658712.8A CN201310658712A CN104703281A CN 104703281 A CN104703281 A CN 104703281A CN 201310658712 A CN201310658712 A CN 201310658712A CN 104703281 A CN104703281 A CN 104703281A
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channel
allocated
candidate
configuration
interference strength
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CN104703281B (en
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王云贵
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention discloses a channel distributing method, a channel distributing device and a Wireless Local Area Network system, wherein the channel distributing method includes: determining multiple candidate channel configurations; according to a neighboring parameter of an AP of each channel to be distributed, calculating interference intensity distribution under each candidate channel configuration in the multiple candidate channel configurations; according to the interference intensity distribution under each candidate channel configuration in the multiple candidate channel configurations, selecting a candidate channel configuration corresponding to the interference intensity distribution of the minimum system interference or the most stable system from the multiple candidate channel configurations as an actual channel configuration; and candidate working channel of the AP of the each channel to be distributed in the selected candidate channel configuration as an actual working channel of the AP of each channel to be distributed. The channel distributing method of the preset embodiment can dynamically adjust the actual working channel of the AP of the channel to be distributed, reduce the interference between the APs, effectively use the bandwidth of the channel, increase the speed of data transmission and increase the handing capacity of the system.

Description

Method for channel allocation, channel dividing arrangement and wireless local area network (WLAN) system
Technical field
The present invention relates to radio network technique field, particularly relate to a kind of method for channel allocation, channel dividing arrangement and wireless local area network (WLAN) system.
Background technology
Along with the develop rapidly of wireless communication technology, and WLAN (wireless local area network) (English: wireless local areanetwork, abbreviation: WLAN), be widely used in family, office, public place etc.Common WLAN framework comprises: WLAN controller, WAP (wireless access point) (English: access point, abbreviation: AP), non-ap stations point (abridge: STA) by English: station.AP is to provide the equipment of wireless access, and this WLAN controller is generally used for management and control AP, for AP provides business configuration.This WLAN controller can be follow Request for Comment (English: Request for Comments, abbreviation: RFC) access controller (English: Access Controller, the abbreviation: AC) of 5417.This non-AP STA is be not the STA of AP, can by AP and AC accessing Internet.
Common WLAN mainly uses 2.4 GHzs (English: gigahertz, symbol: GHz) wave band (English: band) and 5GHz wireless frequency spectrum.Wherein, it is (English: channel) that 2.4GHz wireless frequency spectrum is divided into 14 channels, the bandwidth of each channel is (English: to be bandwidth) that 20 megahertzes are (English: megahertz, symbol: MHz), if the difference of the reference frequency of two channels is less than or equal to 20MHz, then these two channel overlaps, these two channels are overlapped channels, otherwise these two channels are non-overlapped channel.If an AP is to the thresholding of the interference strength of another AP higher than setting, then these two AP are adjacent AP.If two adjacent AP use same channel or overlapped channels, then these two AP may disturb mutually, cause WLAN hydraulic performance decline.Therefore, often use non-overlapped channel between adjacent AP, such as channel 1, channel 6 and channel 11.But, in the WLAN deploying a large amount of AP, still may mutually disturb between each AP.
(English: Institute of Electrical and ElectronicsEngineers based on IEEE, abbreviation: in the network system of IEEE) 802.11n standard, the bandwidth of each channel in WLAN can be 20MHz and 40MHz, in the network system of IEEE802.11ac standard, the bandwidth of each channel in WLAN can be any one in 20MHz, 40MHz, 80MHz and 160MHz.Wherein, the channel that the channel that 40MHz, 80MHz and 160MHz are 20MHz by multiple continuous print bandwidth forms, the channel that this channel that is 20MHz by multiple continuous print bandwidth forms can be called high-bandwidth channels.It is (English: primary channel) and secondary channel (English: secondary channel) that the channel of multiple continuous print 20MHz of composition high-bandwidth channels comprises main channel, main channel is any one bandwidth in high-bandwidth channels is the channel of 20MHz, and secondary channel is all bandwidth in high-bandwidth channels except main channel is the channel of 20MHz.Usually, if the main channel in the high-bandwidth channels of the network equipment is interfered and unavailable, then this high-bandwidth channels can not transceiving data; If a secondary channel in this high-bandwidth channels is interfered unavailable, then all secondary channels are all unavailable, if but main channel can use, then can reduce the bandwidth of this high-bandwidth channels, only transceiving data on the primary channel.Such as, if the bandwidth of the main channel of high-bandwidth channels and secondary channel is all 20MHz, when secondary channel is unavailable, this high-bandwidth channels only can in the main channel of 20MHz transceiving data.
In order to improve the throughput of network system, the 20MHz main channel that can be 80MHz or bandwidth by bandwidth be in the high-bandwidth channels of 160MHz and 20MHz secondary channel expand to the expansion secondary channel that expansion main channel that bandwidth is 40MHz and bandwidth are 40MHz.Wherein, bandwidth is can comprise main channel that a bandwidth is 20MHz in the expansion main channel of 40MHz and a bandwidth is the secondary channel of 20MHz, and bandwidth is that can to comprise two bandwidth in the expansion secondary channel of 40MHz be the secondary channel of 20MHz.In this case, if to be the secondary channel of 20MHz unavailable for certain bandwidth in the expansion secondary channel of 40MHz, then the expansion secondary channel of this 40MHz is unavailable, but this high-bandwidth channels also has the expansion main channel of 40MHz to use.Therefore, in the network system of IEEE802.11ac standard, the high-bandwidth channels of the network equipment can dynamic adjusting bandwidth, and expansion main channel and secondary channel.
But in the network system of IEEE802.11ac standard, AP uses high-bandwidth channels, available working channel is reduced, improves the possibility of overlapped channels, aggravation interference.
Summary of the invention
technical problem
In view of this, the technical problem to be solved in the present invention is, how in the network system supporting high-bandwidth channels, reduces the interference between the network equipment.
solution
In order to solve the problems of the technologies described above, in first aspect, the invention provides a kind of method for channel allocation, comprising:
Determine that multiple candidate channel configures, any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the access point AP of each channel to be allocated;
According to the neighbor parameter of the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel;
According to the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration;
The described candidate channel be selected configuration configuration as actual channel comprises, using the real work channel of candidate's working channel of the AP of the channel each to be allocated in the described candidate channel configuration be selected as the AP of each described channel to be allocated.
In conjunction with first aspect, in the first possible implementation of first aspect, described determine multiple candidate channel configuration before, comprising:
AP to described each channel to be allocated sends the request starting neighbours' detection;
The neighbor parameter that the AP receiving described each channel to be allocated sends, described neighbor parameter comprises the interference source mark of AP under each working channel and the interference strength of described interference source mark correspondence of described each channel to be allocated, and described interference strength is the signal strength signal intensity of the signal that the AP of each described channel to be allocated receives from the interference source that described interference source mark is corresponding.
In conjunction with the first possible implementation of first aspect, in the implementation that the second of first aspect is possible, to described each channel to be allocated AP send start neighbours detection request after, comprising:
The AP of described each channel to be allocated receives the request of described beginning neighbours detection, the AP of described each channel to be allocated with neighbours' detect cycle for the cycle, the channel of self is switched to from general work channel each channel that neighbours' sounding channel concentrates, and described general work channel is the AP of described each channel to be allocated channel of working when receiving the request of described beginning neighbours detection;
When the AP of described each channel to be allocated is operated in neighbours' sounding channel, the AP of described each channel to be allocated broadcasts neighbours' probe requests thereby on described neighbours' sounding channel, and described neighbours' sounding channel is any one channel that described neighbours' sounding channel is concentrated;
If the AP of described each channel to be allocated receives neighbours' probe requests thereby on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described neighbours' probe requests thereby; Or if the AP of described each channel to be allocated receives wireless local network information on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described wireless local network information; Or, if the AP of described each channel to be allocated listens to the radiofrequency signal of network of non-radio local agreement on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated neighbor parameter according to described radiofrequency signal record.
In conjunction with first aspect, any one in the first possible implementation of first aspect and the possible implementation of the second of first aspect, in the third possible implementation of first aspect, according to the neighbor parameter of the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, comprising:
Under obtaining any one candidate channel configuration in described multiple candidate channel configuration, the AP of described each channel to be allocated is operated in the interference strength of the candidate's working channel of self, under any one candidate channel configuration in described multiple candidate channel configuration, the interference strength of the AP of described each channel to be allocated constitutes the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration;
Wherein, the interference strength that the AP obtaining described each channel to be allocated is operated in the candidate's working channel of self comprises, according to the neighbor parameter of the AP self of described each channel to be allocated, the AP obtaining described each channel to be allocated on the candidate's working channel of self self interference source to the interference strength summation of self, to be operated in the interference strength of the candidate's working channel of self as the AP of described each channel to be allocated.
In conjunction with the first possible implementation of first aspect and first aspect to any one in the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect, the candidate channel configuration that selecting system disturbs minimum interference strength distribution corresponding from described multiple candidate channel configuration, as actual channel configuration, comprising:
Distribute according to described interference strength, calculate the interference strength summation of the AP of the channel all to be allocated under described multiple candidate channel configuration;
The interference strength summation of the AP of the channel all to be allocated under more described multiple candidate channel configuration;
From described multiple candidate channel configuration, choose the candidate channel configuration that the interference strength summation of the AP of described all channels to be allocated is minimum, configure as described actual channel.
In conjunction with the first possible implementation of first aspect and first aspect to any one in the third possible implementation of first aspect, in the 5th kind of possible implementation of first aspect, from described multiple candidate channel configuration, the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable is as actual channel configuration, comprising:
Distribute according to described interference strength, calculate the interference strength distribution mean square deviation of the AP of the described each channel to be allocated under described multiple candidate channel configuration;
The interference strength distribution mean square deviation of the AP of the described each channel to be allocated under more described multiple candidate channel configuration;
From described multiple candidate channel configuration, choose the candidate channel configuration that the interference strength distribution mean square deviation of the AP of described each channel to be allocated is minimum, configure as described actual channel.
In conjunction with the first possible implementation of first aspect and first aspect to any one in the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation of first aspect, described using be selected candidate channel configuration as actual channel configuration after, comprising:
When the quantity of the AP of the identical channel to be allocated of described real work channel is less than or equal to the quantity of described real work channel sub-channels, from the subchannel of described real work channel, choose the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each described real work channel; And
When the quantity of the AP of the identical channel to be allocated of described real work channel is greater than the quantity of described real work channel sub-channels, according to the neighbor parameter of the AP of the identical channel to be allocated of described each real work channel, calculate the interference strength distribution under each subchannel in the subchannel of described real work channel, the AP that described interference strength distribution under any one subchannel in the subchannel of described real work channel comprises the identical channel to be allocated of described each real work channel is operated in the interference strength of described subchannel, and according to the interference strength distribution under each subchannel in the subchannel of described real work channel, the subchannel that selecting system disturbs the distribution of minimum interference strength corresponding from the subchannel of described real work channel is as the main channel of the AP of the identical channel to be allocated of each described real work channel, or, subchannel corresponding to selecting system is the most stable from the subchannel of described real work channel interference strength distribution is as the main channel of the AP of the identical channel to be allocated of each described real work channel.
In second aspect, the invention provides a kind of channel dividing arrangement, comprise: determination module, for determining that multiple candidate channel configures, any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the access point AP of each channel to be allocated;
Computing module, be connected with described determination module, for the neighbor parameter of the AP according to described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in the described multiple candidate channel configurations determined at described determination module, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel;
Choose module, be connected with described computing module, interference strength distribution under each candidate channel in described multiple candidate channel configuration for calculating according to described computing module configures, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration;
The described candidate working channel of module specifically for, the AP of the channel each to be allocated in the candidate channel configuration be selected described of choosing is as the real work channel of the AP of each described channel to be allocated.
In conjunction with second aspect, in the first possible implementation of second aspect, described channel dividing arrangement also comprises sending module and receiver module;
Described sending module is used for sending to the AP of described each channel to be allocated the request starting neighbours' detection;
The neighbor parameter that described receiver module sends for the AP receiving described each channel to be allocated, described neighbor parameter comprises the interference source mark of AP under each working channel and the interference strength of described interference source mark correspondence of described each channel to be allocated, and described interference strength is the signal strength signal intensity of the signal that the AP of each described channel to be allocated receives from the interference source that described interference source mark is corresponding.
In conjunction with the first possible implementation of second aspect or second aspect, in the implementation that the second of second aspect is possible, described computing module also for,
Under obtaining any one candidate channel configuration in described multiple candidate channel configuration, the AP of described each channel to be allocated is operated in the interference strength of the candidate's working channel of self, under any one candidate channel configuration in described multiple candidate channel configuration, the interference strength of the AP of described each channel to be allocated constitutes the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration;
Wherein, the interference strength that the AP obtaining described each channel to be allocated is operated in the candidate's working channel of self comprises, according to the neighbor parameter of the AP self of described each channel to be allocated, the AP obtaining described each channel to be allocated on the candidate's working channel of self self interference source to the interference strength summation of self, to be operated in the interference strength of the candidate's working channel of self as the AP of described each channel to be allocated.
In conjunction with second aspect, any one in the first possible implementation of second aspect and the possible implementation of the second of second aspect, in the third possible implementation of second aspect, described computing module, also for distributing according to described interference strength, calculates the interference strength summation of the AP of the channel all to be allocated under described multiple candidate channel configuration;
The interference strength summation of the AP of the described channel all to be allocated chosen under the described multiple candidate channel configuration that module also calculates for more described computing module; And the candidate channel configuration that the interference strength summation choosing the AP of described all channels to be allocated from described multiple candidate channel configuration is minimum, configure as described actual channel.
In conjunction with second aspect, any one in the first possible implementation of second aspect and the possible implementation of the second of second aspect, in the 4th kind of possible implementation of second aspect, described computing module, also for distributing according to described interference strength, calculates the interference strength distribution mean square deviation of the AP of the described each channel to be allocated under described multiple candidate channel configuration;
The described interference strength choosing the AP of the lower described each channel to be allocated of described multiple candidate channel configuration that module also calculates for more described computing module distributes mean square deviation; And the candidate channel configuration that the interference strength distribution mean square deviation choosing the AP of described each channel to be allocated from described multiple candidate channel configuration is minimum, configure as described actual channel.
In conjunction with the first possible implementation of second aspect and second aspect to any one in the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation of second aspect, described channel dividing arrangement also comprises judge module;
Described judge module chooses module with described and described computing module is connected, and whether the quantity for the AP judging the channel to be allocated that described real work channel is identical is less than or equal to the quantity of described real work channel sub-channels;
Described module of choosing is when being also less than or equal to the quantity of described real work channel sub-channels for the quantity of the AP judging the channel to be allocated that described real work channel is identical at described judge module, chooses the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each described real work channel from the subchannel of described real work channel;
Described computing module is also greater than the quantity of described real work channel sub-channels for the quantity of the AP judging the channel to be allocated that described real work channel is identical at described judge module, according to the neighbor parameter of the AP of the identical channel to be allocated of described each real work channel, calculate the interference strength distribution under each subchannel in the subchannel of described real work channel, the AP that described interference strength distribution under any one subchannel in the subchannel of described real work channel comprises the identical channel to be allocated of described each real work channel is operated in the interference strength of described subchannel, and described in choose module also for the interference strength distribution under each subchannel in the subchannel of described real work channel of calculating according to described computing module, the subchannel that selecting system disturbs the distribution of minimum interference strength corresponding from the subchannel of described real work channel is as the main channel of the AP of the identical channel to be allocated of each described real work channel, or, subchannel corresponding to selecting system is the most stable from the subchannel of described real work channel interference strength distribution is as the main channel of the AP of the identical channel to be allocated of each described real work channel.
In the third aspect, the invention provides a kind of wireless local area network (WLAN) system, comprising: the wireless access point AP of at least one wireless lan controller and multiple channel to be allocated;
Described wireless lan controller determines that multiple candidate channel configures, and any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the AP of the channel each to be allocated in the AP of described multiple channel to be allocated;
The neighbor parameter that described wireless lan controller obtains according to the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel;
Described wireless lan controller is according to the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration;
The candidate channel be selected configuration comprises as actual channel configuration by described wireless lan controller, using the real work channel of candidate's working channel of the AP of the channel each to be allocated in the described candidate channel configuration be selected as the AP of each described channel to be allocated.
In conjunction with the third aspect, in the first possible implementation of the third aspect, the AP of described each channel to be allocated obtains neighbor parameter, comprising:
The AP of described each channel to be allocated receives the request of described beginning neighbours detection, the AP of described each channel to be allocated with neighbours' detect cycle for the cycle, the channel of self is switched to from general work channel each channel that neighbours' sounding channel concentrates, and described general work channel is the AP of described each channel to be allocated channel of working when receiving the request of described beginning neighbours detection;
When the AP of described each channel to be allocated is operated in neighbours' sounding channel, the AP of described each channel to be allocated broadcasts neighbours' probe requests thereby on described neighbours' sounding channel, and described neighbours' sounding channel is any one channel that described neighbours' sounding channel is concentrated;
If the AP of described each channel to be allocated receives described neighbours' probe requests thereby on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described neighbours' probe requests thereby; Or if the AP of described each channel to be allocated receives wireless local network information on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described wireless local network information; Or, if the AP of described each channel to be allocated listens to the radiofrequency signal of network of non-radio local agreement on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated neighbor parameter according to described radiofrequency signal record.
beneficial effect
The method for channel allocation of the present embodiment, channel dividing arrangement and wireless local area network (WLAN) system, by determining that multiple candidate channel configures, the interference strength distribution under the configuration of each candidate channel is calculated according to the neighbor parameter of the AP of each channel to be allocated, again according to the interference strength distribution under each candidate channel configuration calculated, the candidate channel configuration of the interference strength distribution correspondence that selecting system interference is minimum or system is the most stable from multiple candidate channel configuration configures as actual channel, and then determine the real work channel of AP of each channel to be allocated, can the real work channel of AP of dynamic conditioning channel to be allocated, reduce the interference between AP, effectively utilize channel width, promote the speed of transfer of data, improve throughput of system.
According to below with reference to the accompanying drawings to detailed description of illustrative embodiments, further feature of the present invention and aspect will become clear.
Accompanying drawing explanation
Comprise in the description and form the accompanying drawing of a part for specification and specification together illustrates exemplary embodiment of the present invention, characteristic sum aspect, and for explaining principle of the present invention.
Fig. 1 is the flow chart of the method for channel allocation according to the embodiment of the present invention one;
Fig. 2 is the structured flowchart of the channel dividing arrangement according to the embodiment of the present invention two;
Fig. 3 is the structured flowchart of the wireless local area network (WLAN) system according to the embodiment of the present invention three; And
Fig. 4 is the structured flowchart of the channel dividing arrangement according to the embodiment of the present invention four.
Embodiment
Various exemplary embodiment of the present invention, characteristic sum aspect is described in detail below with reference to accompanying drawing.The same or analogous element of Reference numeral presentation function identical in accompanying drawing.Although the various aspects of embodiment shown in the drawings, unless otherwise indicated, accompanying drawing need not be drawn in proportion.
Word " exemplary " special here means " as example, embodiment or illustrative ".Here need not be interpreted as being better than or being better than other embodiment as any embodiment illustrated by " exemplary ".
In addition, in order to better the present invention is described, in embodiment hereafter, give numerous details.It will be appreciated by those skilled in the art that do not have some detail, the present invention can implement equally.In some instances, the method known for those skilled in the art, means, element and circuit are not described in detail, so that highlight purport of the present invention.
embodiment 1
Fig. 1 is the flow chart of the method for channel allocation according to the embodiment of the present invention one.As shown in Figure 1, this method for channel allocation mainly comprises:
Step S110, AC determine that multiple candidate channel configures, and any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the access point AP of each channel to be allocated.
Particularly, the AC such as network switch, router, server can be comprised in WLAN, AP is wireless router, home gateway, radio network interface controller (English: wireless networkinterface controller such as, abbreviation: WNIC), the terminal equipments such as non-AP STA such as mobile phone, panel computer, e-book.Wherein, non-AP STA can by AP and AC accessing Internet.
AC is before determining the configuration of multiple candidate channel, can the national code corresponding according to managed AP or area code, in conjunction with WLAN channel list to obtain the working channel collection of the AP managed, working channel collection refers to the set specifying spendable working channel according to laws and regulations.For example: illustrate for 2.4GHz wireless frequency spectrum, it is CN that AC manages the national code of AP1, AP1, then AC can determine the working channel of AP1 integrate as channel 1, channel 2, channel 3 ... channel 13.After AC determines the working channel collection of managed AP, in the following manner, the AP of channel to be allocated can be determined.
Managed all AP can be defined as the AP of channel to be allocated by mode one, AC.Such as: suppose that WLAN comprises AC, AP1, AP2 and AP3, AC manages AP1, AP2 and AP3, then AC can determine that AP1, AP2 and AP3 are the AP of channel to be allocated.
The AP being subject to the interference of non-wlan device can be defined as the AP of channel to be allocated by mode two, AC.Such as: suppose that WLAN comprises AC, AP1, AP2 and AP3, AP2 is subject to the interference of bluetooth equipment, and AC manages AP1, AP2 and AP3, then AC can determine that AP2 is the AP of channel to be allocated.
The AP newly reached the standard grade can be defined as the AP of channel to be allocated by mode three, AC.Such as: suppose that WLAN comprises AC, AP1, AP2 and AP3, when 18 days 5 November in 2013 10 points, AC manages AP1, AP2 and AP3, AP1 and AP2 10 points of registrations achieved on AC when 18 days 4 November in 2013 are reached the standard grade, AP3 10 points of registrations achieved on AC when 18 days 5 November in 2013 are reached the standard grade, then AC can determine that AP3 is the AP of channel to be allocated.
The AP that packet loss in business transmitting procedure can be exceeded thresholding by mode four, AC is defined as the AP of channel to be allocated.Packet loss refers in setting-up time, the message total object ratio that the message dropping number of AP transmission and AP transmit.After packet loss between the non-AP STA that AP monitored and accessed self is greater than the thresholding of specifying, AP sends link-state change message to AC.Wherein, link-state change message comprises packet loss, or link-state change message comprises flag bit, and this flag bit instruction packet loss is greater than the thresholding of specifying.
It should be noted that, although the present embodiment only describes AC determines channel to be allocated AP by above-mentioned four kinds of modes, AC also can determine the AP of channel to be allocated by alternate manner, the present invention is not limited thereto.
Particularly, after AC determines the AP of channel to be allocated, the neighborhood between managed each AP and interference source can also be obtained.The interference source of each AP can comprise other AP except this AP and ambient noise.Wherein, other AP except this AP comprises management AP and non-management AP, and management AP refers to other AP except this AP that AC manages, and non-management AP refers to the AP that this AC non-manages.Ambient noise refers to the radiofrequency signal of the network of non-radio local agreement that this AP exists in the environment.If AP has the function of the interference source type identified except AP, then the interference source of AP can also comprise non-wlan device.Non-wlan device is the equipment that AP can identify, such as bluetooth, microwave oven, intelligent instrument etc.AP can be (English: electromagnetic spectrum) to identify this non-wlan device according to the electromagnetic spectrum of the radiofrequency signal of the network of non-radio local agreement received from non-wlan device.When AP has the function identifying interference source type except AP, ambient noise refer to this AP the interference that brings of the interference source that this AP can not identify in the environment, such as radar signal.AP can distinguish self each neighbours by unique mark, AP is that the interference source of ambient noise and non-wlan device distributes special mark.Such as: ambient noise, namely this AP interference source that can not identify be designated 1, bluetooth be designated 2, microwave oven be designated 3.
In a kind of possible implementation, before AC determines the configuration of multiple candidate channel, can send to the AP of each channel to be allocated the request starting neighbours' detection.After the AP of each channel to be allocated receives the request of the beginning neighbours detection that AC sends, the channel of self for the cycle, is switched to from general work channel each channel that neighbours' sounding channel concentrates with neighbours' detect cycle by the AP of each channel to be allocated.Wherein, general work channel is the channel that the AP of each channel to be allocated works when receiving the request starting neighbours' detection.When the AP of each channel to be allocated is operated in neighbours' sounding channel, the AP of each channel to be allocated broadcasts neighbours' probe requests thereby on neighbours' sounding channel, and neighbours' sounding channel is any one channel that neighbours' sounding channel is concentrated.If the AP of each channel to be allocated receives neighbours' probe requests thereby on general work channel or neighbours' sounding channel, then the AP of each channel to be allocated obtains neighbor parameter according to neighbours' probe requests thereby; Or if the AP of each channel to be allocated receives wireless local network information on general work channel or neighbours' sounding channel, then the AP of each channel to be allocated obtains neighbor parameter according to wireless local network information; Or if the AP of each channel to be allocated listens to the radiofrequency signal of network of non-radio local agreement on general work channel or neighbours' sounding channel, then the AP of each channel to be allocated is according to radiofrequency signal record neighbor parameter.The neighbor parameter that the AP that AC receives each channel to be allocated again sends, neighbor parameter comprises the interference source mark of AP under each working channel and the interference strength of interference source mark correspondence of each channel to be allocated, and interference strength is the signal strength signal intensity of the signal that the AP of each channel to be allocated receives from the interference source that interference source mark is corresponding.
After the neighbor parameter that the AP that AC receives each channel to be allocated sends, the neighbor parameter that can receive according to the AP from each channel to be allocated, sets up the neighborhood of the AP of each channel to be allocated.Optionally, neighbor parameter, except comprising the interference source mark of AP under each working channel and the interference strength of interference source mark correspondence of each channel to be allocated, can also comprise sounding channel.Sounding channel refers to that AP is for detecting the channel of neighbor parameter.Management AP does not change with the change of the sounding channel of another management AP the interference strength of another management AP.Such as, AC manages the AP2 that detects on subchannel 36 of AP1 and AP2, AP1 on subchannel 36 to the interference strength of AP1, equals AP2 that AP1 detects on subchannel 40 on subchannel 40 to the interference strength of AP1.Interference source mark refers to the identity information of this interference source, such as, medium access control (English: media access control, abbreviation: the MAC) mark of address, ambient noise in message.Neighborhood refers to the relation between two equipment.For example, if device A listens to the neighbor parameter of equipment B and equipment B does not listen to the neighbor parameter of device A, then AC can determine that equipment B is the unidirectional neighbours of device A.If device A listens to the neighbor parameter of equipment B and equipment B also listens to the neighbor parameter of device A, then AC can determine that device A is the two-way neighbours of equipment B.
Particularly, the method for the neighbor parameter of AC acquisition AP1 and AP2 comprises:
Step 1, AC send the request starting neighbours' detection to AP1 and AP2.Optionally, the request that beginning neighbours detect comprises neighbours' detect cycle (such as 1 minute) and neighbours detect the duration (such as 1 second).Wherein, neighbours' detect cycle detects the duration much larger than neighbours.Preferably, neighbours to detect the duration very little of to reduce impact on the proper communication of AP.Neighbours' detect cycle and neighbours detect the duration and also can be kept in advance in each AP, in this case, without the need to indicating neighbours' detect cycle and neighbours detect the duration in the request of the beginning neighbours detection that AC sends to AP.Optionally, start can also comprise neighbours' sounding channel collection in the request of neighbours' detection, neighbours' sounding channel collection is integrate the set as the channel of 20MHz of the bandwidth determined according to above-mentioned working channel.AP also directly can integrate the set of formation bandwidth as the channel of 20MHz, i.e. neighbours' sounding channel collection with the working channel of self, in this case, without the need to indicating neighbours' sounding channel collection in the request of the beginning neighbours detection that AC sends to AP.For 5GHz wireless frequency spectrum, the AP of AC management comprises AP1 and AP2, if the national code of AP1 and AP2 is CN, then the working channel collection of AP1 and AP2 is { 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165}, then neighbours' sounding channel collection is { <36>, <40>, <44>, <48>, <52>, <56>, <60>, <64>, <149>, <153>, <157>, <161>, <165>}.When AP1 and AP2 receives the request starting neighbours' detection, AP1 and AP2 is operated in channel <36 respectively, 40> and channel <44,48>.The channel that AP works when receiving the request starting neighbours' detection is called the general work channel of this AP.If the channel width of AP work is 20MHz, then the main channel of the channel of the following AP work mentioned is exactly the channel that this AP works.
After step 2, AP1 receive the request of beginning neighbours detection of AC, the channel of self is switched to each concentrated channel of neighbours' sounding channel from general work channel, and detecting the duration this multi-channel operation neighbours, this channel is neighbours' sounding channel of AP1 work at present.AP1, after current neighbours' sounding channel work neighbours detect the duration, switches back general work channel.The channel of self is switched to a channel that neighbours' sounding channel concentrates to about interval neighbours' detect cycle the channel of self is switched to from general work channel one other channel that neighbours' sounding channel concentrates from general work channel by AP1, namely AP1 with neighbours' detect cycle for the channel of self is switched to from general work channel each channel that neighbours' sounding channel concentrates by the cycle.Optionally, the channel of self can not be switched to each concentrated channel of neighbours' sounding channel from general work channel in strict accordance with neighbours' detect cycle by AP, and what namely AP can be random adds or deduct the time much smaller than this neighbours' detect cycle is switched to the channel that neighbours' sounding channel is concentrated from the general work channel time interval as twice to neighbours' detect cycle.Optionally, AP can concentrate the channel identical with the main channel of general work channel without the need to being switched to neighbours' sounding channel.After AP2 receives the request of beginning neighbours detection of AC, identical with the process of AP1, working channel as Just One Of Those Things is <44,48>.When AP1 is operated in neighbours' sounding channel, AP1 broadcasts neighbours' probe requests thereby on neighbours' sounding channel.Such as, this neighbours' probe requests thereby is the probe requests thereby (English: ProbeRequest) message in WLAN.If now AP2 is operated on the channel identical with AP1, then AP2 can receive this neighbours' probe requests thereby.If AP1 receives neighbours' probe requests thereby that AP2 sends, then obtain neighbor parameter, this neighbor parameter comprise the transmit leg MAC Address of neighbours' probe requests thereby that this AP2 sends, corresponding relation between the signal strength signal intensity of channel that AP1 works when receiving neighbours' probe requests thereby that this AP2 sends and neighbours' probe requests thereby that this AP2 sends.When AP1 is operated in general work channel, if AP1 receives neighbours' probe requests thereby that AP2 sends, then obtain neighbor parameter, this neighbor parameter comprise the transmit leg MAC Address of neighbours' probe requests thereby that this AP2 sends, corresponding relation between the signal strength signal intensity of neighbours' probe requests thereby that the main channel of channel that AP1 works when receiving neighbours' probe requests thereby that this AP2 sends and this AP2 send.If AP1 receives the WLAN message that non-management AP sends on general work channel or neighbours' sounding channel, then obtain neighbor parameter, this neighbor parameter comprise the transmit leg MAC Address of this WLAN message, corresponding relation between the main channel of channel that AP1 works when receiving this WLAN message and the signal strength signal intensity of this WLAN message.If AP1 listens to the radiofrequency signal of non-WLAN agreement on general work channel or neighbours' sounding channel, i.e. ambient noise, AP1 records neighbor parameter, this neighbor parameter comprises the mark of the interference source of ambient noise, the corresponding relation between the signal strength signal intensity of the channel of this radiofrequency signal and this radiofrequency signal.If AP has the function of the interference source type identified except AP, AP1 identifies the non-wlan device launching this radiofrequency signal according to the electromagnetic spectrum of this radiofrequency signal, record neighbor parameter, this neighbor parameter comprises the corresponding relation between the signal strength signal intensity of the mark of the interference source of non-wlan device, the channel of this radiofrequency signal and this radiofrequency signal.
Neighbor parameter is sent to AC by step 3, AP.Optionally, AP can once obtain neighbor parameter namely send to AC; The neighbor parameter of acquisition also periodically can be sent to AC by AP; The neighbor parameter of acquisition can also be sent to AC by AP after the quantity of the neighbor parameter obtained reaches certain condition.
The method that AC obtains the neighbor information of non-management AP is identical with the method that AC obtains neighbor information manage AP, distinguishes and is that AC manages AP to share out the work channel.
Particularly, AC determines that the method that multiple candidate channel configures can comprise:
The candidate channel bandwidth of the AP of each channel to be allocated can be adopted identical global channel bandwidth by step S20, AC.AC can in the following manner, and the AP for all channels to be allocated determines a global channel bandwidth.Mode one, AC according to the order from system acceptance, can determine the global channel bandwidth of the AP of all channels to be allocated.From the order of system acceptance, such as indicate global channel bandwidth to be 80MHz, then AC can determine that the global channel bandwidth of the AP of all channels to be allocated is 80MHz.The highest channel width according to the subscriber channel bandwidth ability got, can be defined as the global channel bandwidth of the AP of all channels to be allocated by mode two, AC.When STA reaches the standard grade, STA to AP send probe requests thereby (English: probe request) or association request (English: associate request) or reassociation requests (English: re-associate request), probe requests thereby or association are asked or are carried subscriber channel bandwidth ability in reassociation requests, such as higher throughput is (English: very high throughput, abbreviation: VTH) 20/VTH40/VTH80 etc., VTH20 represents that channel width is 20MHz, VTH40 represents that channel width is that 40MHz, VTH80 represent that channel width is 80MHz.After AP gets subscriber channel bandwidth ability, AP can send the maximum channel bandwidth ability of STA to AC.AC preserves the maximum channel bandwidth ability of the STA that AP sends, the maximum channel bandwidth ability of the AP of more each channel to be allocated, and the global channel bandwidth maximum channel width corresponding for maximum channel bandwidth ability being defined as the AP of all channels to be allocated.For example, the AP of AC management comprises AP1, AP2 and AP3, AC determines that AP1, AP2 and AP3 are the AP of channel to be allocated, suppose that the subscriber channel bandwidth ability that AP1 gets is VTH40/VTH80, the subscriber channel bandwidth ability that AP2 gets is the subscriber channel bandwidth ability that VTH20/VTH40, AP3 get is VTH40.Then AP1 can send maximum channel bandwidth ability to AC is that can to send maximum channel bandwidth ability to AC be that can to send maximum channel bandwidth ability to AC be VTH40 for VTH40, AP3 for VTH80, AP2.Then AC can determine that the bandwidth 80MHz corresponding with VTH80 is the global channel bandwidth of AP1, AP2 and AP3.
Step S21, AC can, according to global channel bandwidth, concentrate the AP for each channel to be allocated to divide multiple candidate's working channel from working channel.AC first can determine the relation of global channel bandwidth and 20MHz, when global channel bandwidth is n 20MHz, working channel can concentrate continuous n 20MHz subchannel to be divided into candidate's working channel by AC successively, and any two candidate's working channels are not overlapping.For example, the AP of AC management comprises AP1, AP2 and AP3, and AC determines that AP1, AP2 and AP3 are the AP of channel to be allocated, illustrates for 5GHz wireless frequency spectrum, if the national code of AP1, AP2 and AP3 is CN, then the working channel collection of AP1, AP2 and AP3 is { 36,40,44,48,52,56,60,64,149,153,157,161,165}, supposes that AC determines that the global channel bandwidth of AP1, AP2 and AP3 is 80MHz.Then the channel width of AP1, AP2 and AP3 is all 80MHz.AC can by { 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165} is divided into { <36, 40, 44, 48>, <52, 56, 60, 64>, <149, 153, 157, 161>}, wherein, <36, 40, 44, 48>, <52, 56, 60, 64> and <149, 153, 157, 161> is AP1, candidate's working channel of AP2 and AP3.<36,40, the high-bandwidth channels of 44,48> to be bandwidth be 80MHz, and the subchannel 48 being 20MHz by the subchannel 44 that bandwidth is the subchannel 36 of 20MHz, bandwidth is the subchannel 40 of 20MHz, bandwidth is 20MHz and bandwidth forms.
Step S22, AC can be corresponding according to the AP of each channel to be allocated multiple candidate's working channels, determine that multiple candidate channel configures.AC can from the candidate's working channel determined, the AP for each channel to be allocated chooses candidate's working channel, forms a candidate channel configuration.Candidate's working channel combination in any that the AP of each channel to be allocated chooses by AC, forms the configuration of all possible candidate channel.Be n in the quantity of candidate's working channel, when the quantity of the AP of channel to be allocated is m, the quantity of all possible candidate channel configuration is m^n, i.e. the n power of m.The AP that each candidate channel is configured to each channel to be allocated is assigned with candidate's working channel, AP1, AP2 and AP3 is comprised at the AP of AC management, when AC determines that AP1, AP2 and AP3 are the AP of channel to be allocated, in candidate channel configuration 1, AP1 is operated in working channel one, AP2 is operated in working channel two, AP3 and is operated in working channel three.For example, suppose that AC determines that candidate's working channel of AP1, AP2 and AP3 comprises: <36,40,44,48>, <52,56,60,64> and <149,153,157,161>.Then AC can determine 27 kinds of candidate channel configurations.Such as: candidate channel configuration 1:AP1 shares out the work channel <36,40,44,48>, AP2 shares out the work channel <36,40,44,48>, AP3 shares out the work channel <52,56,60,64>; Candidate channel configuration 2:AP1 shares out the work channel <52,56,60,64>, AP2 shares out the work channel <52,56,60,64>, AP3 shares out the work channel <52,56,60,64>; Candidate channel configuration 3:AP1 shares out the work channel <36,40,44,48>, AP2 shares out the work channel <52,56,60,64>, AP3 shares out the work channel <149,153,157,161>.
In addition, AC determines that the method that multiple candidate channel configures also can comprise:
Step S23, AC can determine the candidate channel bandwidth of the AP of each channel to be allocated.AC according to the subscriber channel bandwidth ability of the AP of the channel each to be allocated got, can determine the candidate channel bandwidth of the AP of each channel to be allocated.The concrete example of the subscriber channel bandwidth ability of the AP of each channel to be allocated of AC acquisition can see the associated description of the mode two of above-mentioned steps S20.For example, the AP of AC management comprises AP1, AP2 and AP3, AC determines that AP1, AP2 and AP3 are the AP of channel to be allocated, suppose that the subscriber channel bandwidth ability that AC gets AP1 is VTH40/VTH80, the subscriber channel bandwidth ability that AC gets AP2 is the subscriber channel bandwidth ability that VTH40, AC get AP3 is VTH40, then AC can determine that the candidate channel bandwidth of AP1 is 40MHz or 80MHz, the candidate channel bandwidth of AP2 is the candidate channel bandwidth of 40MHz, AP3 is 40MHz.
Step S24, AC can, according to the candidate channel bandwidth of the AP of each channel to be allocated, concentrate the AP for each channel to be allocated to divide multiple candidate's working channel from working channel.AC first can determine the candidate channel bandwidth of the AP of channel to be allocated and the relation of 20MHz, when the candidate channel bandwidth of the AP of channel to be allocated is n 20MHz, working channel can be concentrated continuous n 20MHz subchannel by AC successively, be divided into candidate's working channel of the AP of this channel to be allocated, any two candidate's working channels of the AP of each channel to be allocated are not overlapping.Concrete example can see the associated description in above-mentioned steps S21.
Step S25, AC can be corresponding according to the AP of each channel to be allocated multiple candidate's working channels, determine that multiple candidate channel configures.AC can from candidate's working channel of the AP of the channel each to be allocated determined, the AP for each channel to be allocated chooses candidate's working channel, forms a candidate channel configuration.Candidate's working channel combination in any that the AP of each channel to be allocated chooses by AC, forms the configuration of all possible candidate channel.Concrete example can see the associated description in above-mentioned steps S22.
Step S130, AC are according to the neighbor parameter of the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel.
Particularly, after AC determines the configuration of multiple candidate channel, can according to the neighbor parameter of the AP of the channel each to be allocated obtained, on candidate's working channel, neighbours' Interference Estimation is carried out to the AP of each channel to be allocated, to determine that the AP of each channel to be allocated is operated in the interference strength on candidate's working channel.Neighbours' interference comprises the interference of managing neighbor and non-management neighbours, and managing neighbor refers to the neighborhood between AP and AP that AC manages.Non-management neighbours comprise following several types: type one, outside AP neighbours, refer to the AP beyond the AP that AC manages, and also referred to as non-management AP, typically refer to the AP that this AC non-manages.Type two, ambient noise, the radiofrequency signal of the non-WLAN agreement existed in finger ring border.The neighbor parameter obtaining the AP of each channel to be allocated see AC in above-mentioned steps S110 is known, if AP has the function of the interference source type identified except AP, then the non-management neighbours of AP can also comprise non-wlan device neighbours, such as bluetooth, microwave oven, intelligent instrument etc.When AP has the function identifying interference source type except AP, ambient noise refer to this AP the interference that brings of the interference source that this AP can not identify in the environment, such as radar signal.AP can be each ambient noise allocation identification detected, and the neighbor parameter that record is corresponding with this ambient noise.Neighbours' Interference Estimation is the interference strength that the AP calculating each channel to be allocated is operated on self candidate's working channel.Such as, AC can according to the neighbor parameter of the AP of the channel to be allocated obtained, if candidate's working channel of the AP of channel to be allocated is high-bandwidth channels, then AC can by by each bandwidth in candidate's working channel be 20MHz subchannel on interference strength be added, again divided by the quantity of subchannel, the AP that can obtain each channel to be allocated is operated in the interference strength on the candidate's working channel of self.
In a kind of possible implementation, under AC obtains any one candidate channel configuration in multiple candidate channel configuration, the AP of each channel to be allocated is operated in the interference strength of the candidate's working channel of self, under any one candidate channel configuration in the configuration of multiple candidate channel, the interference strength of the AP of each channel to be allocated constitutes the interference strength distribution under any one candidate channel configuration in multiple candidate channel configuration.AC can according to the neighbor parameter of the AP self of each channel to be allocated, the AP obtaining each channel to be allocated on the candidate's working channel of self self interference source to the interference strength summation of self, to be operated in the interference strength of the candidate's working channel of self as the AP of each channel to be allocated.
For example, AP1 and AP2 is the AP of channel to be allocated, supposes that candidate's working channel of AP1 and AP2 is all <36,40>.AC gets AP1 on subchannel 36 according to the neighbor parameter of AP1, and AP2 is x to the interference strength of AP1 on subchannel 36 1, AP2 is 0 to the interference strength of AP1 on subchannel 40, and bluetooth is x to the interference strength of AP1 on subchannel 36 2, radar signal is x to the interference strength of AP1 on subchannel 36 3; AC gets at AP2 on subchannel 40, and AP1 is y to the interference strength of AP2 on subchannel 40 1, bluetooth is y to the interference strength of AP1 on subchannel 40 2, radar signal is y to the interference strength of AP1 on subchannel 40 3.Then AC can calculate the interference strength summation of AP1 on subchannel 36 is x 1+ x 2+ x 3, the interference strength summation of AP1 on subchannel 40 is x 1+ x 2+ x 3, AC can calculate AP1 at candidate's working channel <36, and the interference strength summation on 40> is x 1+ x 2+ x 3.In like manner, AC can calculate the interference strength summation of AP2 on subchannel 40 is y 1+ y 2+ y 3, the interference strength summation of AP1 on subchannel 36 is y 1+ y 2+ y 3.Further, AC can calculate AP2 at candidate's working channel <36, and the interference strength summation on 40> is y 1+ y 2+ y 3.
Step S150, AC are according to the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration.
Particularly, after AC calculates the interference strength distribution under each candidate channel configuration in multiple candidate channel configuration, can from multiple candidate channel configuration, selecting system disturbs minimum candidate channel configuration to configure as actual channel.Such as, AC can calculate the interference strength summation of the AP of the channel all to be allocated under the configuration of multiple candidate channel, the interference strength summation of the AP of the channel all to be allocated under candidate channel configuration is minimum, system interference is minimum, then can choose the minimum candidate channel of the interference strength summation of the AP of the lower channel all to be allocated of candidate channel configuration and configure and configure as actual channel.AC also can from multiple candidate channel configuration, and the interference chosen between each AP is the most even, and the candidate channel configuration that system is the most stable configures as actual channel.Such as, AC can calculate the interference strength distribution mean square deviation of the AP of the channel each to be allocated under the configuration of multiple candidate channel, the interference strength distribution mean square deviation of the AP of the channel each to be allocated under candidate channel configuration is minimum, system is the most stable, then can choose the minimum candidate channel of the lower interference strength distribution mean square deviation of candidate channel configuration and configure and configure as actual channel.AC can also take into account system interference and the stability of a system of candidate channel configuration, chooses the actual channel configuration of the AP of each channel to be allocated from multiple candidate channel configuration.
In a kind of possible implementation, AC selecting system from multiple candidate channel configuration disturbs candidate channel configuration corresponding to minimum interference strength distribution to comprise as the method for actual channel configuration: first, AC, according to the interference strength distribution under each candidate channel configuration in multiple candidate channel configuration calculated, calculates the interference strength summation of the AP of the channel all to be allocated under the configuration of multiple candidate channel; Then, the interference strength summation of the AP of the channel all to be allocated under the configuration of AC more multiple candidate channel; Finally, AC chooses the minimum candidate channel configuration of the interference strength summation of the AP of all channels to be allocated from the configuration of multiple candidate channel, configures as actual channel.
In a kind of possible implementation, the method that the candidate channel configuration of the interference strength distribution correspondence that AC selecting system from multiple candidate channel configuration is the most stable configures as actual channel comprises: first, AC, according to the interference strength distribution under each candidate channel configuration in multiple candidate channel configuration calculated, calculates the interference strength distribution mean square deviation of the AP of the channel each to be allocated under the configuration of multiple candidate channel; Then, the interference strength distribution mean square deviation of the AP of the channel each to be allocated under the configuration of AC more multiple candidate channel; Finally, AC chooses the minimum candidate channel configuration of the interference strength distribution mean square deviation of the AP of each channel to be allocated from the configuration of multiple candidate channel, configures as actual channel.Particularly, AC is according to the interference strength distribution under each candidate channel configuration in multiple candidate channel configuration calculated, and the method calculating the interference strength distribution mean square deviation of the AP of the channel each to be allocated under the configuration of multiple candidate channel comprises: step 31, AC calculate the interference strength summation of the AP of the channel all to be allocated under the configuration of each candidate channel; Step 32, AC calculate the interference strength mean value of the AP of the channel each to be allocated under the configuration of each candidate channel, that is: AC is by the quantity of the interference strength summation of the AP of the channel all to be allocated under each candidate channel configuration divided by the AP of channel to be allocated, to obtain the interference strength mean value of the AP of the channel each to be allocated under the configuration of each candidate channel; Step 33, AC calculate interference strength summation on the candidate's working channel of self of the AP of channel each to be allocated under the configuration of each candidate channel and each candidate channel configure under the difference of interference strength mean value of AP of channel each to be allocated; Step 34, AC calculate the difference of interference strength summation on the candidate's working channel of self of the AP of channel each to be allocated under the configuration of each candidate channel and interference strength mean value square; Step 35, AC by the interference strength summation of the AP of channel each to be allocated lower for the configuration of each candidate channel on the candidate's working channel of self and the summed square of the difference of interference strength mean value, with calculate each candidate channel configure under the interference strength of AP of channel each to be allocated to distribute mean square deviation.
The candidate channel be selected configuration comprises as actual channel configuration by step S170, described AC, and AC is using the real work channel of candidate's working channel of the AP of the channel each to be allocated in the described candidate channel configuration be selected as the AP of each described channel to be allocated.
For example, the AP of AC management comprises AP1, AP2 and AP3, AC determines that AP1, AP2 and AP3 are the AP of channel to be allocated, suppose that AC chooses candidate channel configuration 1:AP1 and to share out the work channel <36,40>, AP2 share out the work channel <52,56>, AP3 shares out the work channel <44,48>, is actual channel configuration.Then AC is the real work channel that AP1 distributes is <36,40>; The real work channel distributed for AP2 is <52,56>; The real work channel distributed for AP3 is <44,48>.
In a kind of possible implementation, AC using be selected candidate channel configuration as actual channel configuration after, can also be each channel to be allocated AP distribution main channel.AC is that the AP of each channel to be allocated distributes the method for main channel and comprises: when the quantity of the AP of the identical channel to be allocated of real work channel is less than or equal to the quantity of real work channel sub-channels, and AC chooses the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each real work channel from the subchannel of real work channel; and when the quantity of the AP of the identical channel to be allocated of real work channel is greater than the quantity of real work channel sub-channels, AC is according to the neighbor parameter of the AP of the identical channel to be allocated of each real work channel, calculate the interference strength distribution under each subchannel in the subchannel of real work channel, the AP that interference strength distribution under any one subchannel in the subchannel of real work channel comprises the identical channel to be allocated of each real work channel is operated in the interference strength of subchannel, and according to the interference strength distribution under each subchannel in the subchannel of real work channel, the subchannel that selecting system disturbs the distribution of minimum interference strength corresponding from the subchannel of real work channel is as the main channel of the AP of the identical channel to be allocated of each real work channel, or, subchannel corresponding to selecting system is the most stable from the subchannel of real work channel interference strength distribution is as the main channel of the AP of the identical channel to be allocated of each real work channel.
Particularly, AC using be selected candidate channel configuration as actual channel configuration after, for the AP of the identical channel to be allocated of real work channel, when the quantity of the AP of the identical channel to be allocated of real work channel is less than or equal to the quantity of real work channel sub-channels, AC can from the subchannel of real work channel, chooses the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each real work channel.When the quantity of the AP of the identical channel to be allocated of real work channel is greater than the quantity of real work channel sub-channels, suppose that the AP of each channel to be allocated only works on the primary channel, from each sub-channels, selecting system disturbs minimum subchannel as the main channel of the AP of each channel to be allocated.Such as, AC can adopt the method in above-mentioned steps S150 to calculate the interference strength summation of the AP of the channel all to be allocated under each sub-channels, the interference strength summation of the AP of the channel all to be allocated under subchannel is minimum, system interference is minimum, then can choose the minimum subchannel of the interference strength summation of the AP of the channel all to be allocated under subchannel as main channel.And for example, AC can adopt the method in above-mentioned steps S150 to calculate the interference strength distribution mean square deviation of the AP of the channel each to be allocated under each sub-channels, the interference strength distribution mean square deviation of the AP of the channel each to be allocated under subchannel is minimum, system is the most stable, then can choose the minimum subchannel of interference strength distribution mean square deviation of the AP of the channel each to be allocated under subchannel as main channel.For another example, AC can also take into account system interference and the total system stability of subchannel, chooses the main channel of the AP of each channel to be allocated from each sub-channels.
Optionally, AC can to after the AP grouping of the identical channel to be allocated of real work channel, then adopts said method to be that the AP of each channel to be allocated in group distributes main channel.The method of AC to the AP grouping of the identical channel to be allocated of real work channel is: first, and AC chooses arbitrarily an AP and puts into first group from the AP of the identical channel to be allocated of real work channel.Then, from the AP of the identical channel to be allocated of real work channel, the AP that there is neighborhood with this AP chosen is picked out and puts into this first group.Finally, from the AP of the identical channel to be allocated of real work channel, successively the AP that there is neighborhood with each AP in this first group is picked out and put into this first group, until each AP in AP and first group of the identical channel to be allocated of real work channel does not exist neighborhood.
It should be noted that, although the AP allocated channel of to be AC be channel to be allocated that the present embodiment describes, the AP with AC function also can be the AP allocated channel of channel to be allocated.
The method for channel allocation of the present embodiment, by determining that multiple candidate channel configures, the interference strength distribution under the configuration of each candidate channel is calculated according to the neighbor parameter of the AP of each channel to be allocated, again according to the interference strength distribution under each candidate channel configuration calculated, the candidate channel configuration of the interference strength distribution correspondence that selecting system interference is minimum or system is the most stable from multiple candidate channel configuration configures as actual channel, and then determine the real work channel of AP of each channel to be allocated, can the real work channel of AP of dynamic conditioning channel to be allocated, reduce the interference between AP, effectively utilize channel width, promote the speed of transfer of data, improve throughput of system.
embodiment 2
Fig. 2 is the structured flowchart of the channel dividing arrangement according to the embodiment of the present invention two.The method for channel allocation that the channel dividing arrangement 200 that the present embodiment provides provides for realizing the embodiment one shown in Fig. 1.As shown in Figure 2, this channel dividing arrangement 200 mainly comprises: determination module 210, computing module 220, choose module 230, sending module 240, receiver module 250 and judge module 260.
Determination module 210 is for determining that multiple candidate channel configures, and any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the access point AP of each channel to be allocated.
Particularly, channel dividing arrangement 200 can be AC, also can for having the AP of AC function.Can comprise the AC such as network switch, router, server in WLAN, AP is wireless router, home gateway, radio network interface controller such as, the terminal equipments such as non-AP STA such as mobile phone, panel computer, e-book.Wherein, non-AP STA can by AP and AC accessing Internet.
Before determination module 210 determines the configuration of multiple candidate channel, channel dividing arrangement 200 can the national code corresponding according to managed AP or area code, in conjunction with WLAN channel list to obtain the working channel collection of the AP managed, working channel collection refers to the set specifying spendable working channel according to laws and regulations.Concrete example can obtain the associated description of the working channel collection of the AP managed see AC in step S110 in above-described embodiment one.After channel dividing arrangement 200 obtains the working channel collection of the AP managed, in the following manner, the AP of channel to be allocated can be determined.
Managed all AP can be defined as the AP of channel to be allocated by mode one, channel dividing arrangement 200.The AP being subject to the interference of non-wlan device can be defined as the AP of channel to be allocated by mode two, AC.The AP newly reached the standard grade can be defined as the AP of channel to be allocated by mode three, AC.The AP that packet loss in business transmitting procedure can be exceeded thresholding by mode four, AC is defined as the AP of channel to be allocated.Packet loss refers in setting-up time, the message total object ratio that the message dropping number of AP transmission and AP transmit.After packet loss between the non-AP STA that AP monitored and accessed self is greater than the thresholding of specifying, AP sends link-state change message to AC.Wherein, link-state change message comprises packet loss, or link-state change message comprises flag bit, and this flag bit instruction packet loss is greater than the thresholding of specifying.Concrete example can determine the associated description of the AP of channel to be allocated see AC in step S110 in above-described embodiment one.
It should be noted that, although the present embodiment only describes channel dividing arrangement 200 determines channel to be allocated AP by above-mentioned four kinds of modes, but channel dividing arrangement 200 also can determine the AP of channel to be allocated by alternate manner, the present invention is not limited thereto.
Particularly, after channel dividing arrangement 200 determines the AP of channel to be allocated, the neighborhood between managed each AP and interference source can also be obtained.The interference source of each AP can comprise other AP except this AP and ambient noise.Wherein, other AP except this AP comprises management AP and non-management AP, and management AP refers to that other AP except this AP that channel dividing arrangement 200 manages, non-management AP refer to the AP that this channel dividing arrangement 200 non-manages.Ambient noise refers to the radiofrequency signal of the network of non-radio local agreement that this AP exists in the environment.If AP has the function of the interference source type identified except AP, then the interference source of AP can also comprise non-wlan device.Non-wlan device is the equipment that AP can identify, such as bluetooth, microwave oven, intelligent instrument etc.AP can identify this non-wlan device according to the electromagnetic spectrum of the radiofrequency signal of the network of non-radio local agreement received from non-wlan device.When AP has the function identifying interference source type except AP, ambient noise refer to this AP the interference that brings of the interference source that this AP can not identify in the environment, such as radar signal.AP can distinguish self each neighbours by unique mark, AP is that the interference source of ambient noise and non-wlan device distributes special mark.Such as: ambient noise, namely this AP interference source that can not identify be designated 1, bluetooth be designated 2, microwave oven be designated 3.
Described sending module 240 sends for the AP to described each channel to be allocated the request starting neighbours' detection, the neighbor parameter that described receiver module 250 sends for the AP receiving described each channel to be allocated, described neighbor parameter comprises the interference source mark of AP under each working channel and the interference strength of described interference source mark correspondence of described each channel to be allocated, and described interference strength is the signal strength signal intensity of the signal that the AP of each described channel to be allocated receives from the interference source that described interference source mark is corresponding.
After the neighbor parameter that the AP that receiver module 250 receives each channel to be allocated sends, the neighbor parameter that channel dividing arrangement 200 can receive from the AP of each channel to be allocated according to receiver module 250, sets up the neighborhood of the AP of each channel to be allocated.Optionally, neighbor parameter, except comprising the interference source mark of AP under each working channel and the interference strength of interference source mark correspondence of each channel to be allocated, can also comprise sounding channel.Sounding channel refers to that AP is for detecting the channel of neighbor parameter.Management AP does not change with the change of the sounding channel of another management AP the interference strength of another management AP.Such as, channel dividing arrangement 200 manages AP1 and AP2, and the AP2 that AP1 detects on subchannel 36 to the interference strength of AP1, equals AP2 that AP1 detects on subchannel 40 on subchannel 40 to the interference strength of AP1 on subchannel 36.Interference source mark refers to the identity information of this interference source, such as, Media Access Control address in message, the mark of ambient noise.Neighborhood refers to the relation between two equipment.For example, if device A listens to the neighbor parameter of equipment B and equipment B does not listen to the neighbor parameter of device A, then channel dividing arrangement 200 can determine that equipment B is the unidirectional neighbours of device A.If device A listens to the neighbor parameter of equipment B and equipment B also listens to the neighbor parameter of device A, then channel dividing arrangement 200 can determine that device A is the two-way neighbours of equipment B.
The method that channel dividing arrangement 200 obtains the neighbor parameter of AP1 and AP2 specifically can obtain the associated description of the method for the neighbor parameter of AP1 and AP2 see AC in step S110 in above-described embodiment one.
Channel dividing arrangement 200 determines that method that multiple candidate channel configures can determine the associated description of the method that multiple candidate channel configures see AC in step S110 in above-described embodiment one.
Computing module 220 is connected with described determination module 210, for the neighbor parameter of the AP according to described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in the described multiple candidate channel configurations determined at described determination module 210, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel.
Particularly, after determination module 210 determines the configuration of multiple candidate channel, computing module 220 can according to the neighbor parameter of the AP of the channel each to be allocated obtained, on candidate's working channel, neighbours' Interference Estimation is carried out to the AP of each channel to be allocated, to determine that the AP of each channel to be allocated is operated in the interference strength on candidate's working channel.Neighbours' interference comprises the interference of managing neighbor and non-management neighbours, and managing neighbor refers to the neighborhood between AP and AP that channel dividing arrangement 200 manages.Non-management neighbours comprise following several types: type one, outside AP neighbours, refer to the AP beyond the AP that channel dividing arrangement 200 manages, and also referred to as non-management AP, typically refer to the AP that this channel dividing arrangement 200 non-manages.Type two, ambient noise, the radiofrequency signal of the non-WLAN agreement existed in finger ring border.If AP has the function of the interference source type identified except AP, then the non-management neighbours of AP can also comprise non-wlan device neighbours, such as bluetooth, microwave oven, intelligent instrument etc.When AP has the function identifying interference source type except AP, ambient noise refer to this AP the interference that brings of the interference source that this AP can not identify in the environment, such as radar signal.AP can be each ambient noise allocation identification detected, and the neighbor parameter that record is corresponding with this ambient noise.Neighbours' Interference Estimation is the interference strength that the AP calculating each channel to be allocated is operated on self candidate's working channel.Such as, the neighbor parameter of the AP of the channel to be allocated that computing module 220 can receive according to receiver module 240, if candidate's working channel of the AP of channel to be allocated is high-bandwidth channels, then computing module 220 can by by each bandwidth in candidate's working channel be 20MHz subchannel on interference strength be added, again divided by the quantity of subchannel, the AP that can obtain each channel to be allocated is operated in the interference strength on the candidate's working channel of self.
In a kind of possible implementation, described computing module 220 also for, under obtaining any one candidate channel configuration in described multiple candidate channel configuration, the AP of described each channel to be allocated is operated in the interference strength of the candidate's working channel of self, under any one candidate channel configuration in described multiple candidate channel configuration, the interference strength of the AP of described each channel to be allocated constitutes the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration; Wherein, the interference strength that the AP obtaining described each channel to be allocated is operated in the candidate's working channel of self comprises, according to the neighbor parameter of the AP self of described each channel to be allocated, the AP obtaining described each channel to be allocated on the candidate's working channel of self self interference source to the interference strength summation of self, to be operated in the interference strength of the candidate's working channel of self as the AP of described each channel to be allocated.Concrete example can see the associated description in step S130 in above-described embodiment one.
Choose module 230 to be connected with described computing module 220, interference strength distribution under each candidate channel in described multiple candidate channel configuration for calculating according to described computing module 220 configures, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration.
Particularly, after computing module 220 calculates the interference strength distribution under each candidate channel configuration in multiple candidate channel configuration, choosing module 230 can from multiple candidate channel configuration, and selecting system disturbs minimum candidate channel configuration to configure as actual channel.Such as, computing module 220 can calculate the interference strength summation of the AP of the channel all to be allocated under the configuration of multiple candidate channel, the interference strength summation of the AP of the channel all to be allocated under candidate channel configuration is minimum, system interference is minimum, then choose module 230 and can choose the minimum candidate channel of the interference strength summation of the AP of the lower channel all to be allocated of candidate channel configuration and configure and configure as actual channel.Choosing module 230 also can from multiple candidate channel configuration, and the interference chosen between each AP is the most even, and the candidate channel configuration that system is the most stable configures as actual channel.Such as, computing module 220 can calculate the interference strength distribution mean square deviation of the AP of the channel each to be allocated under the configuration of multiple candidate channel, the interference strength distribution mean square deviation of the AP of the channel each to be allocated under candidate channel configuration is minimum, system is the most stable, then choose module 230 and can choose the minimum candidate channel of the lower interference strength distribution mean square deviation of candidate channel configuration and configure and configure as actual channel.Choose system interference and the stability of a system that module 230 can also take into account candidate channel configuration, from multiple candidate channel configuration, choose the actual channel configuration of the AP of each channel to be allocated.
In a kind of possible implementation, described computing module 220, also for distributing according to described interference strength, calculates the interference strength summation of the AP of the channel all to be allocated under described multiple candidate channel configuration; The described interference strength summation chosen under the described multiple candidate channel configuration that module 230 also calculates for more described computing module 220; And the minimum candidate channel configuration of interference strength summation is chosen from described multiple candidate channel configuration, configure as described actual channel.
In a kind of possible implementation, described computing module 220, also for distributing according to described interference strength, calculates the interference strength distribution mean square deviation of the AP of the described each channel to be allocated under described multiple candidate channel configuration; The described interference strength choosing the AP of the lower described each channel to be allocated of described multiple candidate channel configuration that module 230 also calculates for more described computing module 220 distributes mean square deviation; And the candidate channel configuration that the interference strength distribution mean square deviation choosing the AP of described each channel to be allocated from described multiple candidate channel configuration is minimum, configure as described actual channel.Particularly, computing module 220 is according to the interference strength distribution under each candidate channel configuration in multiple candidate channel configuration calculated, and the method calculating the interference strength distribution mean square deviation of the AP of the channel each to be allocated under the configuration of multiple candidate channel specifically can calculate the associated description of the method for the interference strength distribution mean square deviation of the AP of the channel each to be allocated under the configuration of multiple candidate channel see AC in step S150 in above-described embodiment one.
The described candidate working channel of module 230 specifically for, the AP of the channel each to be allocated in the candidate channel configuration be selected described of choosing is as the real work channel of the AP of each described channel to be allocated.Concrete example can see the associated description in step S170 in above-described embodiment one.
Described judge module 260 chooses module 230 with described and described computing module 220 is connected, and whether the quantity for the AP judging the channel to be allocated that described real work channel is identical is less than or equal to the quantity of described real work channel sub-channels.
Described module 230 of choosing is when being also less than or equal to the quantity of described real work channel sub-channels for the quantity of the AP judging the channel to be allocated that described real work channel is identical at described judge module 260, chooses the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each described real work channel from the subchannel of described real work channel.Described computing module 220 is also greater than the quantity of described real work channel sub-channels for the quantity of the AP judging the channel to be allocated that described real work channel is identical at described judge module 260, according to the neighbor parameter of the AP of the identical channel to be allocated of described each real work channel, calculate the interference strength distribution under each subchannel in the subchannel of described real work channel, the AP that described interference strength distribution under any one subchannel in the subchannel of described real work channel comprises the identical channel to be allocated of described each real work channel is operated in the interference strength of described subchannel, and described in choose module 230 also for the interference strength distribution under each subchannel in the subchannel of described real work channel of calculating according to described computing module, the subchannel that selecting system disturbs the distribution of minimum interference strength corresponding from the subchannel of described real work channel is as the main channel of the AP of the identical channel to be allocated of each real work channel, or, subchannel corresponding to selecting system is the most stable from the subchannel of described real work channel interference strength distribution is as the main channel of the AP of the identical channel to be allocated of each real work channel.
Particularly, choose module 230 using be selected candidate channel configuration as actual channel configuration after, for the AP of the identical channel to be allocated of real work channel, when judge module 260 judges that the quantity of the AP of the channel to be allocated that real work channel is identical is less than or equal to the quantity of real work channel sub-channels, choosing module 230 can from the subchannel of real work channel, chooses the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each real work channel.When judge module 260 judges that the quantity of the AP of the channel to be allocated that real work channel is identical is greater than the quantity of real work channel sub-channels, suppose that the AP of each channel to be allocated only works on the primary channel, choosing module 230 can disturb minimum subchannel as the main channel of the AP of each channel to be allocated by selecting system from each sub-channels.Such as, computing module 220 can adopt the method in above-described embodiment one in step S150 to calculate the interference strength summation of the AP of the channel all to be allocated under each sub-channels, the interference strength summation of the AP of the channel all to be allocated under subchannel is minimum, system interference is minimum, then choose module 230 and can choose the minimum subchannel of the interference strength summation of the AP of the channel all to be allocated under subchannel as main channel.And for example, computing module 220 can adopt the method in above-described embodiment one in step S150 to calculate the interference strength distribution mean square deviation of the AP of the channel each to be allocated under each sub-channels, the interference strength distribution mean square deviation of the AP of the channel each to be allocated under subchannel is minimum, system is the most stable, then choose module 230 and can choose the minimum subchannel of the interference strength distribution mean square deviation of the AP of the channel each to be allocated under subchannel as main channel.For another example, choose system interference and total system stability that module 230 can also take into account subchannel, from each sub-channels, choose the main channel of the AP of each channel to be allocated.
Optionally, channel dividing arrangement 200 can to after the AP grouping of the identical channel to be allocated of real work channel, then adopts said method to be that the AP of each channel to be allocated in group distributes main channel.The method of the AP grouping of the channel to be allocated that channel dividing arrangement 200 pairs of real work channels are identical is: first, and channel dividing arrangement 200 is chosen arbitrarily an AP and put into first group from the AP of the identical channel to be allocated of real work channel.Then, from the AP of the identical channel to be allocated of real work channel, the AP that there is neighborhood with this AP chosen is picked out and puts into this first group.Finally, from the AP of the identical channel to be allocated of real work channel, successively the AP that there is neighborhood with each AP in this first group is picked out and put into this first group, until each AP in AP and first group of the identical channel to be allocated of real work channel does not exist neighborhood.
The channel dividing arrangement of the present embodiment, determine that multiple candidate channel configures by determination module, computing module calculates the interference strength distribution under the configuration of each candidate channel according to the neighbor parameter of the AP of each channel to be allocated, the interference strength choosing each candidate channel configuration that module calculates according to computing module lower distributes, the candidate channel configuration of the interference strength distribution correspondence that selecting system interference is minimum or system is the most stable from multiple candidate channel configuration configures as actual channel, and then determine the real work channel of AP of each channel to be allocated, can the real work channel of AP of dynamic conditioning channel to be allocated, reduce the interference between AP, effectively utilize channel width, promote the speed of transfer of data, improve throughput of system.
embodiment 3
Fig. 3 is the structured flowchart of the wireless local area network (WLAN) system according to the embodiment of the present invention three.As shown in Figure 3, this wireless local area network (WLAN) system 300 comprises: the WAP (wireless access point) 320 of at least one wireless lan controller 310 and multiple channel to be allocated.Described wireless lan controller 310 is that the method for WAP (wireless access point) 320 allocated channel of multiple channel to be allocated comprises:
First, described wireless lan controller 310 determines that multiple candidate channel configures, and any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the WAP (wireless access point) 320 of the channel each to be allocated in the WAP (wireless access point) 320 of described multiple channel to be allocated.
Secondly, the neighbor parameter that described wireless lan controller 310 obtains according to the WAP (wireless access point) 320 of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, the WAP (wireless access point) 320 that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel.
Next, described wireless lan controller 310 is according to the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration.
Finally, the candidate channel be selected configuration comprises as actual channel configuration by described wireless lan controller 310, using the real work channel of candidate's working channel of the WAP (wireless access point) 320 of the channel each to be allocated in the described candidate channel configuration be selected as the WAP (wireless access point) 320 of each described channel to be allocated.
In a kind of possible implementation, the WAP (wireless access point) 320 of described each channel to be allocated obtains neighbor parameter, comprise: the WAP (wireless access point) 320 of described each channel to be allocated receives the request of the described beginning neighbours detection that described wireless lan controller 310 sends, the WAP (wireless access point) 320 of described each channel to be allocated with neighbours' detect cycle for the cycle, the channel of self is switched to each concentrated channel of neighbours' sounding channel from general work channel, described general work channel is the WAP (wireless access point) 320 of described each channel to be allocated channel of working when receiving the request of described beginning neighbours detection, when the WAP (wireless access point) 320 of described each channel to be allocated is operated in neighbours' sounding channel, the WAP (wireless access point) 320 of described each channel to be allocated broadcasts neighbours' probe requests thereby on described neighbours' sounding channel, and described neighbours' sounding channel is any one channel that described neighbours' sounding channel is concentrated, if the WAP (wireless access point) 320 of described each channel to be allocated receives neighbours' probe requests thereby on described general work channel or described neighbours' sounding channel, then the WAP (wireless access point) 320 of described each channel to be allocated obtains described neighbor parameter according to described neighbours' probe requests thereby, or, if the WAP (wireless access point) 320 of described each channel to be allocated receives wireless local network information on described general work channel or described neighbours' sounding channel, then the WAP (wireless access point) 320 of described each channel to be allocated obtains described neighbor parameter according to described wireless local network information, or, if the WAP (wireless access point) 320 of described each channel to be allocated listens to the radiofrequency signal of network of non-radio local agreement on described general work channel or described neighbours' sounding channel, then the WAP (wireless access point) 320 of described each channel to be allocated neighbor parameter according to described radiofrequency signal record.
The wireless local area network (WLAN) system of the present embodiment, wireless lan controller is by determining that multiple candidate channel configures, the interference strength distribution under the configuration of each candidate channel is calculated according to the neighbor parameter of the WAP (wireless access point) of each channel to be allocated, according to the interference strength distribution under each candidate channel configuration calculated, the candidate channel configuration of the interference strength distribution correspondence that selecting system interference is minimum or system is the most stable from multiple candidate channel configuration configures as actual channel, and then determine the real work channel of WAP (wireless access point) of each channel to be allocated, can the real work channel of WAP (wireless access point) of dynamic conditioning channel to be allocated, reduce the interference between WAP (wireless access point), effectively utilize channel width, promote the speed of transfer of data, improve throughput of system.
embodiment 4
Fig. 4 is the structured flowchart of the channel dividing arrangement according to the embodiment of the present invention four.Communicationsinterface) 420 processor) 410 it is (English:, communication interface is (English:, memory is (English: memory) 430 and bus 440 that described channel dividing arrangement 400 comprises processor.Wherein, processor 410, communication interface 420 and memory 430 complete mutual communication by bus 440.This channel dividing arrangement 400 can be AC or the AP with AC function.Communication interface 420 is for communicating with the AP of channel to be allocated.
Processor 410 is for executive program.Processor 410 can be central processing unit (English: centralprocessing unit, abbreviation: CPU).
Memory 430 for depositing said procedure, and deposits the real work channel etc. of neighbor parameter, distribution.Memory 430 can be that volatile memory is (English: volatile memory), such as random access memory is (English: random-access memory, abbreviation: RAM), or nonvolatile memory is (English: non-volatile memory), such as read-only memory is (English: read-only memory, abbreviation: ROM), flash memory is (English: flash memory), hard disk is (English: hard disk drive, abbreviation: HDD) or solid state hard disc (English: solid-state drive, abbreviation: SSD).Memory 430 is connected with processor 410.
In a kind of possible implementation, said procedure can be the program code comprising computer-managed instruction.This processor 410 performs following steps according to program command:
Determine that multiple candidate channel configures, any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the access point AP of each channel to be allocated;
According to the neighbor parameter of the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel;
According to the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration;
The described candidate channel be selected configuration configuration as actual channel comprises, using the real work channel of candidate's working channel of the AP of the channel each to be allocated in the described candidate channel configuration be selected as the AP of each described channel to be allocated.
In a kind of possible implementation, described determine multiple candidate channel configuration before, comprising:
AP to described each channel to be allocated sends the request starting neighbours' detection;
The neighbor parameter that the AP receiving described each channel to be allocated sends, described neighbor parameter comprises the interference source mark of AP under each working channel and the interference strength of described interference source mark correspondence of described each channel to be allocated, and described interference strength is the signal strength signal intensity of the signal that the AP of each described channel to be allocated receives from the interference source that described interference source mark is corresponding.
In a kind of possible implementation, to described each channel to be allocated AP send start neighbours detection request after, comprising:
The AP of described each channel to be allocated receives the request of described beginning neighbours detection, the AP of described each channel to be allocated with neighbours' detect cycle for the cycle, the channel of self is switched to from general work channel each channel that neighbours' sounding channel concentrates, and described general work channel is the AP of described each channel to be allocated channel of working when receiving the request of described beginning neighbours detection;
When the AP of described each channel to be allocated is operated in neighbours' sounding channel, the AP of described each channel to be allocated broadcasts neighbours' probe requests thereby on described neighbours' sounding channel, and described neighbours' sounding channel is any one channel that described neighbours' sounding channel is concentrated;
If the AP of described each channel to be allocated receives described neighbours' probe requests thereby on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described neighbours' probe requests thereby; Or if the AP of described each channel to be allocated receives wireless local network information on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described wireless local network information; Or, if the AP of described each channel to be allocated listens to the radiofrequency signal of network of non-radio local agreement on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated neighbor parameter according to described radiofrequency signal record.
In a kind of possible implementation, according to the neighbor parameter of the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, comprising:
Under obtaining any one candidate channel configuration in described multiple candidate channel configuration, the AP of described each channel to be allocated is operated in the interference strength of the candidate's working channel of self, under any one candidate channel configuration in described multiple candidate channel configuration, the interference strength of the AP of described each channel to be allocated constitutes the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration;
Wherein, the interference strength that the AP obtaining described each channel to be allocated is operated in the candidate's working channel of self comprises, according to the neighbor parameter of the AP self of described each channel to be allocated, the AP obtaining described each channel to be allocated on the candidate's working channel of self self interference source to the interference strength summation of self, to be operated in the interference strength of the candidate's working channel of self as the AP of described each channel to be allocated.
In a kind of possible implementation, the candidate channel configuration that selecting system disturbs minimum interference strength distribution corresponding from described multiple candidate channel configuration, as actual channel configuration, comprising:
Distribute according to described interference strength, calculate the interference strength summation of the AP of the channel all to be allocated under described multiple candidate channel configuration;
The interference strength summation of the AP of the channel all to be allocated under more described multiple candidate channel configuration;
From described multiple candidate channel configuration, choose the candidate channel configuration that the interference strength summation of the AP of described all channels to be allocated is minimum, configure as described actual channel.
In a kind of possible implementation, from described multiple candidate channel configuration, the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable is as actual channel configuration, comprising:
Distribute according to described interference strength, calculate the interference strength distribution mean square deviation of the AP of the described each channel to be allocated under described multiple candidate channel configuration;
The interference strength distribution mean square deviation of the AP of the described each channel to be allocated under more described multiple candidate channel configuration;
From described multiple candidate channel configuration, choose the candidate channel configuration that the interference strength distribution mean square deviation of the AP of described each channel to be allocated is minimum, configure as described actual channel.
In a kind of possible implementation, described using be selected candidate channel configuration as actual channel configuration after, comprising:
When the quantity of the AP of the identical channel to be allocated of described real work channel is less than or equal to the quantity of described real work channel sub-channels, from the subchannel of described real work channel, choose the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each described real work channel; And
When the quantity of the AP of the identical channel to be allocated of described real work channel is greater than the quantity of described real work channel sub-channels, according to the neighbor parameter of the AP of the identical channel to be allocated of described each real work channel, calculate the interference strength distribution under each subchannel in the subchannel of described real work channel, the AP that described interference strength distribution under any one subchannel in the subchannel of described real work channel comprises the identical channel to be allocated of described each real work channel is operated in the interference strength of described subchannel, and according to the interference strength distribution under each subchannel in the subchannel of described real work channel, the subchannel that selecting system disturbs the distribution of minimum interference strength corresponding from the subchannel of described real work channel is as the main channel of the AP of the identical channel to be allocated of each described real work channel, or, subchannel corresponding to selecting system is the most stable from the subchannel of described real work channel interference strength distribution is as the main channel of the AP of the identical channel to be allocated of each described real work channel.
The channel dividing arrangement of the present embodiment, by determining that multiple candidate channel configures, the interference strength distribution under the configuration of each candidate channel is calculated according to the neighbor parameter of the AP of each channel to be allocated, again according to the interference strength distribution under each candidate channel configuration calculated, the candidate channel configuration of the interference strength distribution correspondence that selecting system interference is minimum or system is the most stable from multiple candidate channel configuration configures as actual channel, and then determine the real work channel of AP of each channel to be allocated, can the real work channel of AP of dynamic conditioning channel to be allocated, reduce the interference between AP, effectively utilize channel width, promote the speed of transfer of data, improve throughput of system.
Those of ordinary skill in the art can recognize, each exemplary cell in embodiment described herein and algorithm steps, can realize with computer software.Can think that all or part of (such as to the part that prior art contributes) of technical scheme of the present invention embodies in form of a computer software product to a certain extent.This computer software product is stored in the storage medium of embodied on computer readable usually, comprises all or part of step of some instructions in order to make computer equipment (can be personal computer, server or the network equipment etc.) perform various embodiments of the present invention method.And aforesaid storage medium comprise USB flash memory driver (English: USB flash drive), portable hard drive, ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or substitute, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.

Claims (15)

1. a method for channel allocation, is characterized in that, comprising:
Determine that multiple candidate channel configures, any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the access point AP of each channel to be allocated;
According to the neighbor parameter of the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel;
According to the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration;
The described candidate channel be selected configuration configuration as actual channel comprises, using the real work channel of candidate's working channel of the AP of the channel each to be allocated in the described candidate channel configuration be selected as the AP of each described channel to be allocated.
2. method for channel allocation according to claim 1, is characterized in that, described determine multiple candidate channel configuration before, comprising:
AP to described each channel to be allocated sends the request starting neighbours' detection;
The neighbor parameter that the AP receiving described each channel to be allocated sends, described neighbor parameter comprises the interference source mark of AP under each working channel and the interference strength of described interference source mark correspondence of described each channel to be allocated, and described interference strength is the signal strength signal intensity of the signal that the AP of each described channel to be allocated receives from the interference source that described interference source mark is corresponding.
3. method for channel allocation according to claim 2, is characterized in that, to described each channel to be allocated AP send start neighbours detection request after, comprising:
The AP of described each channel to be allocated receives the request of described beginning neighbours detection, the AP of described each channel to be allocated with neighbours' detect cycle for the cycle, the channel of self is switched to from general work channel each channel that neighbours' sounding channel concentrates, and described general work channel is the AP of described each channel to be allocated channel of working when receiving the request of described beginning neighbours detection;
When the AP of described each channel to be allocated is operated in neighbours' sounding channel, the AP of described each channel to be allocated broadcasts neighbours' probe requests thereby on described neighbours' sounding channel, and described neighbours' sounding channel is any one channel that described neighbours' sounding channel is concentrated;
If the AP of described each channel to be allocated receives described neighbours' probe requests thereby on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described neighbours' probe requests thereby; Or if the AP of described each channel to be allocated receives wireless local network information on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described wireless local network information; Or, if the AP of described each channel to be allocated listens to the radiofrequency signal of network of non-radio local agreement on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated neighbor parameter according to described radiofrequency signal record.
4. method for channel allocation as claimed in any of claims 1 to 3, it is characterized in that, according to the neighbor parameter of the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, comprising:
Under obtaining any one candidate channel configuration in described multiple candidate channel configuration, the AP of described each channel to be allocated is operated in the interference strength of the candidate's working channel of self, under any one candidate channel configuration in described multiple candidate channel configuration, the interference strength of the AP of described each channel to be allocated constitutes the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration;
Wherein, the interference strength that the AP obtaining described each channel to be allocated is operated in the candidate's working channel of self comprises, according to the neighbor parameter of the AP self of described each channel to be allocated, the AP obtaining described each channel to be allocated on the candidate's working channel of self self interference source to the interference strength summation of self, to be operated in the interference strength of the candidate's working channel of self as the AP of described each channel to be allocated.
5. method for channel allocation as claimed in any of claims 1 to 4, is characterized in that, the candidate channel configuration that selecting system disturbs minimum interference strength distribution corresponding from described multiple candidate channel configuration, as actual channel configuration, comprising:
Distribute according to described interference strength, calculate the interference strength summation of the AP of the channel all to be allocated under described multiple candidate channel configuration;
The interference strength summation of the AP of the channel all to be allocated under more described multiple candidate channel configuration;
From described multiple candidate channel configuration, choose the candidate channel configuration that the interference strength summation of the AP of described all channels to be allocated is minimum, configure as described actual channel.
6. method for channel allocation as claimed in any of claims 1 to 4, is characterized in that, from described multiple candidate channel configuration, the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable is as actual channel configuration, comprising:
Distribute according to described interference strength, calculate the interference strength distribution mean square deviation of the AP of the described each channel to be allocated under described multiple candidate channel configuration;
The interference strength distribution mean square deviation of the AP of the described each channel to be allocated under more described multiple candidate channel configuration;
From described multiple candidate channel configuration, choose the candidate channel configuration that the interference strength distribution mean square deviation of the AP of described each channel to be allocated is minimum, configure as described actual channel.
7. method for channel allocation as claimed in any of claims 1 to 6, is characterized in that, described using be selected candidate channel configuration as actual channel configuration after, comprising:
When the quantity of the AP of the identical channel to be allocated of described real work channel is less than or equal to the quantity of described real work channel sub-channels, from the subchannel of described real work channel, choose the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each described real work channel; And
When the quantity of the AP of the identical channel to be allocated of described real work channel is greater than the quantity of described real work channel sub-channels, according to the neighbor parameter of the AP of the identical channel to be allocated of described each real work channel, calculate the interference strength distribution under each subchannel in the subchannel of described real work channel, the AP that described interference strength distribution under any one subchannel in the subchannel of described real work channel comprises the identical channel to be allocated of described each real work channel is operated in the interference strength of described subchannel, and according to the interference strength distribution under each subchannel in the subchannel of described real work channel, the subchannel that selecting system disturbs the distribution of minimum interference strength corresponding from the subchannel of described real work channel is as the main channel of the AP of the identical channel to be allocated of each described real work channel, or, subchannel corresponding to selecting system is the most stable from the subchannel of described real work channel interference strength distribution is as the main channel of the AP of the identical channel to be allocated of each described real work channel.
8. a channel dividing arrangement, is characterized in that, comprising:
Determination module, for determining that multiple candidate channel configures, any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the access point AP of each channel to be allocated;
Computing module, be connected with described determination module, for the neighbor parameter of the AP according to described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in the described multiple candidate channel configurations determined at described determination module, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel;
Choose module, be connected with described computing module, interference strength distribution under each candidate channel in described multiple candidate channel configuration for calculating according to described computing module configures, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration;
The described candidate working channel of module specifically for, the AP of the channel each to be allocated in the candidate channel configuration be selected described of choosing is as the real work channel of the AP of each described channel to be allocated.
9. channel dividing arrangement according to claim 8, is characterized in that, described channel dividing arrangement also comprises sending module and receiver module;
Described sending module is used for sending to the AP of described each channel to be allocated the request starting neighbours' detection;
The neighbor parameter that described receiver module sends for the AP receiving described each channel to be allocated, described neighbor parameter comprises the interference source mark of AP under each working channel and the interference strength of described interference source mark correspondence of described each channel to be allocated, and described interference strength is the signal strength signal intensity of the signal that the AP of each described channel to be allocated receives from the interference source that described interference source mark is corresponding.
10. channel dividing arrangement according to claim 8 or claim 9, is characterized in that, described computing module also for,
Under obtaining any one candidate channel configuration in described multiple candidate channel configuration, the AP of described each channel to be allocated is operated in the interference strength of the candidate's working channel of self, under any one candidate channel configuration in described multiple candidate channel configuration, the interference strength of the AP of described each channel to be allocated constitutes the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration;
Wherein, the interference strength that the AP obtaining described each channel to be allocated is operated in the candidate's working channel of self comprises, according to the neighbor parameter of the AP self of described each channel to be allocated, the AP obtaining described each channel to be allocated on the candidate's working channel of self self interference source to the interference strength summation of self, to be operated in the interference strength of the candidate's working channel of self as the AP of described each channel to be allocated.
Channel dividing arrangement in 11. according to Claim 8 to 10 described in any one, is characterized in that,
Described computing module, also for distributing according to described interference strength, calculates the interference strength summation of the AP of the channel all to be allocated under described multiple candidate channel configuration;
The interference strength summation of the AP of the described channel all to be allocated chosen under the described multiple candidate channel configuration that module also calculates for more described computing module; And the candidate channel configuration that the interference strength summation choosing the AP of described all channels to be allocated from described multiple candidate channel configuration is minimum, configure as described actual channel.
Channel dividing arrangement in 12. according to Claim 8 to 10 described in any one, is characterized in that,
Described computing module, also for distributing according to described interference strength, calculates the interference strength distribution mean square deviation of the AP of the described each channel to be allocated under described multiple candidate channel configuration;
The described interference strength choosing the AP of the lower described each channel to be allocated of described multiple candidate channel configuration that module also calculates for more described computing module distributes mean square deviation; And the candidate channel configuration that the interference strength distribution mean square deviation choosing the AP of described each channel to be allocated from described multiple candidate channel configuration is minimum, configure as described actual channel.
Channel dividing arrangement in 13. according to Claim 8 to 12 described in any one, is characterized in that, described channel dividing arrangement also comprises judge module;
Described judge module chooses module with described and described computing module is connected, and whether the quantity for the AP judging the channel to be allocated that described real work channel is identical is less than or equal to the quantity of described real work channel sub-channels;
Described module of choosing is when being also less than or equal to the quantity of described real work channel sub-channels for the quantity of the AP judging the channel to be allocated that described real work channel is identical at described judge module, chooses the main channel of mutually different subchannel as the AP of the identical channel to be allocated of each described real work channel from the subchannel of described real work channel;
Described computing module is also greater than the quantity of described real work channel sub-channels for the quantity of the AP judging the channel to be allocated that described real work channel is identical at described judge module, according to the neighbor parameter of the AP of the identical channel to be allocated of described each real work channel, calculate the interference strength distribution under each subchannel in the subchannel of described real work channel, the AP that described interference strength distribution under any one subchannel in the subchannel of described real work channel comprises the identical channel to be allocated of described each real work channel is operated in the interference strength of described subchannel, and described in choose module also for the interference strength distribution under each subchannel in the subchannel of described real work channel of calculating according to described computing module, the subchannel that selecting system disturbs the distribution of minimum interference strength corresponding from the subchannel of described real work channel is as the main channel of the AP of the identical channel to be allocated of each described real work channel, or, subchannel corresponding to selecting system is the most stable from the subchannel of described real work channel interference strength distribution is as the main channel of the AP of the identical channel to be allocated of each described real work channel.
14. 1 kinds of wireless local area network (WLAN) system, is characterized in that, comprising: the wireless access point AP of at least one wireless lan controller and multiple channel to be allocated;
Described wireless lan controller determines that multiple candidate channel configures, and any one candidate channel configuration in described multiple candidate channel configuration comprises candidate's working channel of the AP of the channel each to be allocated in the AP of described multiple channel to be allocated;
The neighbor parameter that described wireless lan controller obtains according to the AP of described each channel to be allocated, calculate the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, the AP that the described interference strength distribution under any one candidate channel configuration in described multiple candidate channel configuration comprises described each channel to be allocated is operated in the interference strength of described candidate's working channel;
Described wireless lan controller is according to the interference strength distribution under each candidate channel configuration in described multiple candidate channel configuration, from described multiple candidate channel configuration, selecting system disturbs candidate channel configuration corresponding to minimum interference strength distribution to configure as actual channel, or the candidate channel configuration of the interference strength distribution correspondence that selecting system is the most stable configures as actual channel from described multiple candidate channel configuration;
The candidate channel be selected configuration comprises as actual channel configuration by described wireless lan controller, using the real work channel of candidate's working channel of the AP of the channel each to be allocated in the described candidate channel configuration be selected as the AP of each described channel to be allocated.
15. wireless local area network (WLAN) system according to claim 14, is characterized in that, the AP of described each channel to be allocated obtains neighbor parameter, comprising:
The AP of described each channel to be allocated receives the request of the described beginning neighbours detection that described wireless lan controller sends, the AP of described each channel to be allocated with neighbours' detect cycle for the cycle, the channel of self is switched to from general work channel each channel that neighbours' sounding channel concentrates, and described general work channel is the AP of described each channel to be allocated channel of working when receiving the request of described beginning neighbours detection;
When the AP of described each channel to be allocated is operated in neighbours' sounding channel, the AP of described each channel to be allocated broadcasts neighbours' probe requests thereby on described neighbours' sounding channel, and described neighbours' sounding channel is any one channel that described neighbours' sounding channel is concentrated;
If the AP of described each channel to be allocated receives described neighbours' probe requests thereby on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described neighbours' probe requests thereby; Or if the AP of described each channel to be allocated receives wireless local network information on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated obtains described neighbor parameter according to described wireless local network information; Or, if the AP of described each channel to be allocated listens to the radiofrequency signal of network of non-radio local agreement on described general work channel or described neighbours' sounding channel, then the AP of described each channel to be allocated neighbor parameter according to described radiofrequency signal record.
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