CN105188102A - Wireless channel automatic selecting method and system - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/20—Performing reselection for specific purposes for optimising the interference level
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Abstract
The present invention provides a wireless channel automatic selecting method and system. The wireless channel automatic selecting method includes the steps as follows: S1. periodically monitoring the surrounding wireless device information, wherein, the wireless device information includes the number of wireless access nodes on the surrounding channels and the signal intensity of the wireless access nodes; S2. separately calculating the channel disturbance value of the surrounding channels according to the wireless device information; S3. selecting the channel with a smallest channel disturbance value as the wireless channel. The wireless channel automatic selecting method and system realize the automatic selecting of the wireless channel, efficiently improve the wireless performance of a wireless router body, and is suitable for many places such as SOHO and enterprise.
Description
Technical field
The present invention relates to the technical field of radio communication, particularly relate to a kind of wireless channel automatic selecting method and system.
Background technology
At present, wireless network has been deep in the every aspect of people's daily life.In the product of the communications industry, the product with radio function also gets more and more, and relates to the various aspects such as family expenses, commercialization, public place.
Wireless channel, i.e. passage (Channel) are the data-signal Transfer pipes using radio wave signal as transmission medium.For general wireless router, as shown in Figure 1, in conventional 2.4GHz (2.4-2.4835GHz) frequency range, be divided into 13 channels.The selection of usual wireless channel comprises automatically to be selected and manually selects two kinds.
When wireless device is dynamically connected wireless channel certainly, the channel of wireless router meeting choice for use acquiescence.This uses the probability of same channel by increasing, make wireless signal very easily mutually conflict, disturb, and reduces wireless transmission quality., surrounding environment many at wireless signal is disturbed large, can directly have influence on wireless performance, even can go offline, cause user normally to use.
When wireless device manually connects wireless channel, a channel different from surrounding radio sources need be selected as far as possible to avoid wireless co-channel interference, improve wireless transmission effect.In addition, the wireless signal of a channel can disturb two channels be adjacent simultaneously, therefore when arranging wireless channel, should select the plural channel away from other radio signal source.
Channel width, also referred to as band bandwidth, for the frequency range that modulated carrier occupies, is also the standard sending radio signal frequency.In conventional 2.4-2.4835GHz frequency range, the bandwidth of each channel is 20MHz.In actual use, the more high easier distortion of frequency, wherein 20MHz can reach 144Mbps bandwidth when 11n, and its penetrability is better, long transmission distance (about about 100 meters); 40MHz can reach 300Mbps bandwidth when 802.11n, but penetrability is slightly poor, transmission range nearly (about about 50 meters).
In order to allow 802.11n reach optimal rate, limitting by himself agreement, just must use the frequency range of 40MHz, namely the channel of two 20MHz bundled, the frequency range of a 40MHz in whole like this 2.4GHz band limits, can only be held.And once employ the frequency range of 40MHz, whole 2.4GHz just only has a channel to use, easily produce interference, affect Internet Transmission.In view of the impact of above wireless channel and frequency range, under wireless router can automatically switch when disturbing more and is operated in 20MHZ.
Wireless channel selecting method of the prior art has following deficiency usually:
(1), during wireless device start or after restarting, all need again to detect wireless channel around, cause inefficiency;
(2) individual product wireless channel does not observe channel switching law, is directly in non-1,6, on 11 channels, causes disturbing comparatively large around, hydraulic performance decline.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of wireless channel automatic selecting method and system, select preferred channels by the interference environment of wireless access node (AccessPoint, AP) around detecting, thus improve the performance of wireless product.
For achieving the above object and other relevant objects, the invention provides a kind of wireless channel automatic selecting method, comprise the following steps: the wireless device information around step S1, regular monitoring, described wireless device information comprises the number of wireless access node, the signal strength signal intensity of each wireless access node on around each channel; Step S2, calculate the channel interference values of each channel around respectively according to wireless device information; The minimum channel of step S3, selective channel interference value is as wireless channel.
According to above-mentioned wireless channel automatic selecting method, wherein: the automatic selection only carrying out wireless channel for 1,6 and 11 channels.
According to above-mentioned wireless channel automatic selecting method, wherein: in described step S1, every monitoring in 30 minutes wireless device information around.
According to above-mentioned wireless channel automatic selecting method, wherein: described step S2 comprises the following steps:
21) calculate the signal strength signal intensity percentage of each wireless access node according to formula B=(100+A) %, wherein, A is the signal strength signal intensity of wireless access node, and B is the signal strength signal intensity percentage of wireless access node;
22) the co-channel interference information on each channel of surrounding is obtained respectively, described co-channel interference information comprises the number NY of the wireless access node of 55% > B > 25% in the number NX of the wireless access node of B >=55% in same channel, same channel, and the number NZ of the wireless access node of B≤25% in same channel;
23) the adjacent frequency interfere information on each channel of surrounding is obtained respectively, this adjacent frequency interfere information comprises the number TY of the wireless access node of 55% > B > 25% in the number TX of the wireless access node of B >=55% in adjacent channel, adjacent channel, and the number TZ of the wireless access node of B≤25% in adjacent channel;
24) utilize formula S r=NX*100+ (NY+1/2*TY) * 10+NZ+1/4*TZ, calculate the channel interference values Sr of each channel around respectively.
According to above-mentioned wireless channel automatic selecting method, wherein: in described step S3, when the channel that channel interference values is minimum comprises two or more channel, selective channel encodes less channel as wireless channel.
Meanwhile, the present invention also provides a kind of wireless channel automatic selective system, comprises monitoring module, computing module and selection module;
Described monitoring module is used for the wireless device information around regular monitoring, and wherein wireless device information comprises the number of wireless access node, the signal strength signal intensity of each wireless access node on around each channel;
Described computing module is used for the channel interference values calculating each channel around according to wireless device information respectively;
Described selection module is used for the minimum channel of selective channel interference value as wireless channel.
According to above-mentioned wireless channel automatic selective system, wherein: the automatic selection only carrying out wireless channel for 1,6 and 11 channels.
According to above-mentioned wireless channel automatic selective system, wherein: described monitoring module is every monitoring in 30 minutes wireless device information around.
According to above-mentioned wireless channel automatic selective system, wherein: described computing module calculates the channel interference values of channel in the following ways:
1) calculate the signal strength signal intensity percentage of each wireless access node according to formula B=(100+A) %, wherein, A is the signal strength signal intensity of wireless access node, and B is the signal strength signal intensity percentage of wireless access node;
2) the co-channel interference information on each channel of surrounding is obtained respectively, described co-channel interference information comprises the number NY of the wireless access node of 55% > B > 25% in the number NX of the wireless access node of B >=55% in same channel, same channel, and the number NZ of the wireless access node of B≤25% in same channel;
3) the adjacent frequency interfere information on each channel of surrounding is obtained respectively, this adjacent frequency interfere information comprises the number TY of the wireless access node of 55% > B > 25% in the number TX of the wireless access node of B >=55% in adjacent channel, adjacent channel, and the number TZ of the wireless access node of B≤25% in adjacent channel;
4) utilize formula S r=NX*100+ (NY+1/2*TY) * 10+NZ+1/4*TZ, calculate the channel interference values Sr of each channel around respectively.
According to above-mentioned wireless channel automatic selective system, wherein: in described selection module, when the channel that channel interference values is minimum comprises two or more channel, selective channel encodes less channel as wireless channel.
As mentioned above, wireless channel automatic selecting method of the present invention and system, have following beneficial effect:
(1) the automatic selection of wireless channel is achieved;
(2) wireless performance of wireless router itself is effectively improved;
(3) be applicable to numerous places such as SOHO (SmallOfficeHomeOffice, household is handled official business), enterprise use.
Accompanying drawing explanation
Fig. 1 is shown as the channel distribution schematic diagram in 2.4GHz frequency range of the prior art;
Fig. 2 is shown as the flow chart of wireless channel automatic selecting method of the present invention;
Fig. 3 is shown as the structural representation of wireless channel automatic selective system of the present invention.
Element numbers explanation
1 monitoring module
2 computing modules
3 select module
Embodiment
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
It should be noted that, the diagram provided in the present embodiment only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Wireless channel automatic selecting method of the present invention can choose preferred channels according to wireless aps quantity in around identical or adjacent channel automatically automatically.Particularly, wireless channel automatic selecting method of the present invention utilizes wireless router to obtain the service set (ServiceSetIdentifier of ambient signals intensity percent, around all wireless aps numbers, the channel that all wireless aps take, all AP, SSID), the information such as MAC Address and encryption mode, then select preferred channels by wireless aps quantity and signal strength signal intensity on different channels.
With reference to Fig. 2, wireless channel automatic selecting method of the present invention comprises the following steps:
Wireless device information around step S1, regular monitoring, wherein wireless device information comprises the number of wireless aps, the signal strength signal intensity of each wireless aps on around each channel.
Wherein, wireless channel add up to 13.Preferably, wireless channel automatic selecting method of the present invention can only calculate for 1,6 and 11 channels, without the need to calculating for 13 channels.
Preferably, every monitoring in 30 minutes wireless device information around.
Step S2, calculate the channel interference values of each channel around respectively according to wireless device information.
Particularly, step S2 comprises the following steps again:
21) calculate the signal strength signal intensity percentage of each wireless aps according to formula B=(100+A) %, wherein, A is the signal strength signal intensity of wireless aps, and B is the signal strength signal intensity percentage of wireless aps.
Such as: be the wireless aps of-45dbm for signal strength signal intensity, the signal strength signal intensity percentage of its correspondence is 55%.Wherein, dbm is the unit of signal strength signal intensity.Signal strength signal intensity is negative value, is generally at-25dbm ~-75dbm within the scope of this.Close to 0, signal strength signal intensity more represents that signal strength signal intensity is better, disturb larger.
22) the co-channel interference information on each channel of surrounding is obtained respectively, this co-channel interference information comprises the number NY of the wireless aps of 55% > B > 25% in the number NX of the wireless aps of B >=55% in same channel, same channel, and the number NZ of the wireless aps of B≤25% in same channel.
23) the adjacent frequency interfere information on each channel of surrounding is obtained respectively, this adjacent frequency interfere information comprises the number TY of the wireless aps of 55% > B > 25% in the number TX of the wireless aps of B >=55% in adjacent channel, adjacent channel, and the number TZ of the wireless aps of B≤25% in adjacent channel.
24) utilize formula S r=NX*100+ (NY+1/2*TY) * 10+NZ+1/4*TZ, calculate the channel interference values Sr of each channel around respectively.
The minimum channel of step S3, selective channel interference value is as wireless channel.
Particularly, when the channel that channel interference values is minimum comprises two or more channel, selective channel encodes less channel as wireless channel.
Such as, when wireless channel automatic selecting method of the present invention can only calculate for 1,6 and 11 channels, when calculating Sr1>Sr6>Sr11, wireless router selects 11 channels as wireless channel automatically; If Sr1>Sr6=Sr11, then select 6 channels as wireless channel.This is because 6 are less than 11, the channel that chnnel coding is less in the present invention has higher priority.
In order to the Expected Results of wireless channel automatic selecting method of the present invention is described better, illustrates with the WiFi product of SOHO below and specifically set forth the present invention.
Default configuration and the relevant information of setting wireless router are as follows:
A, wireless router support 802.11n;
B, frequency range are adaptive should be 20MHZ/40MHZ; When disturbing BG signal around, mode of operation is 20MHZ;
C, there is wireless channel automatic function selecting;
D, wireless router are monitored for wireless router surrounding environment for every 30 minutes, and obtain wireless device information.
By adopting wireless channel automatic selecting method of the present invention, wireless router carries out the automatic selection of a wireless channel for every 30 minutes, thus guarantees to be connected to current preferred channels, effectively improves the wireless performance of wireless router itself.
With reference to Fig. 3, wireless channel automatic selective system of the present invention comprises the monitoring module 1, computing module 2 and the selection module 3 that are connected successively.
Monitoring module 1 is for the wireless device information around regular monitoring, and wherein wireless device information comprises the number of wireless aps, the signal strength signal intensity of each wireless aps on around each channel.
Wherein, wireless channel add up to 13.Preferably, wireless channel automatic selective system of the present invention can only calculate for 1,6 and 11 channels, without the need to calculating for 13 channels.
Preferably, monitoring module is every monitoring in 30 minutes wireless device information around.
Computing module 2 is for calculating the channel interference values of each channel around respectively according to wireless device information.
Particularly, the channel interference values of each channel is calculated by the following method.
(1) calculate the signal strength signal intensity percentage of each wireless aps according to formula B=(100+A) %, wherein, A is the signal strength signal intensity of wireless aps, and B is the signal strength signal intensity percentage of wireless aps.
Such as: be the wireless aps of-45dbm for signal strength signal intensity, the signal strength signal intensity percentage of its correspondence is 55%.Wherein, dbm is the unit of signal strength signal intensity.Signal strength signal intensity is negative value, is generally at-25dbm ~-75dbm within the scope of this.Close to 0, signal strength signal intensity more represents that signal strength signal intensity is better, disturb larger.
(2) the co-channel interference information on each channel of surrounding is obtained respectively, this co-channel interference information comprises the number NY of the wireless aps of 55% > B > 25% in the number NX of the wireless aps of B >=55% in same channel, same channel, and the number NZ of the wireless aps of B≤25% in same channel.
(3) the adjacent frequency interfere information on each channel of surrounding is obtained respectively, this adjacent frequency interfere information comprises the number TY of the wireless aps of 55% > B > 25% in the number TX of the wireless aps of B >=55% in adjacent channel, adjacent channel, and the number TZ of the wireless aps of B≤25% in adjacent channel.
(4) utilize formula S r=NX*100+ (NY+1/2*TY) * 10+NZ+1/4*TZ, calculate the channel interference values Sr of each channel around respectively.
Select module 3 for the minimum channel of selective channel interference value as wireless channel.
Particularly, when the channel that channel interference values is minimum comprises two or more channel, selective channel encodes less channel as wireless channel.
Such as, when wireless channel automatic selective system of the present invention can only calculate for 1,6 and 11 channels, when calculating Sr1>Sr6>Sr11, wireless router selects 11 channels as wireless channel automatically; If Sr1>Sr6=Sr11, then select 6 channels as wireless channel.This is because 6 are less than 11, the channel that chnnel coding is less in the present invention has higher priority.
In sum, wireless channel automatic selecting method of the present invention and system achieve the automatic selection of wireless channel; Effectively improve the wireless performance of wireless router itself; Be applicable to numerous place such as SOHO, enterprise use.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (10)
1. a wireless channel automatic selecting method, is characterized in that: comprise the following steps:
Wireless device information around step S1, regular monitoring, described wireless device information comprises the number of wireless access node, the signal strength signal intensity of each wireless access node on around each channel;
Step S2, calculate the channel interference values of each channel around respectively according to wireless device information;
The minimum channel of step S3, selective channel interference value is as wireless channel.
2. wireless channel automatic selecting method according to claim 1, is characterized in that: the automatic selection only carrying out wireless channel for 1 in 13 channels in 2.4GHz frequency range, 6 and 11 channels.
3. wireless channel automatic selecting method according to claim 1 and 2, is characterized in that: in described step S1, every monitoring in 30 minutes wireless device information around.
4. wireless channel automatic selecting method according to claim 1 and 2, is characterized in that: described step S2 comprises the following steps:
21) calculate the signal strength signal intensity percentage of each wireless access node according to formula B=(100+A) %, wherein, A is the signal strength signal intensity of wireless access node, and B is the signal strength signal intensity percentage of wireless access node;
22) the co-channel interference information on each channel of surrounding is obtained respectively, described co-channel interference information comprises the number NY of the wireless access node of 55% > B > 25% in the number NX of the wireless access node of B >=55% in same channel, same channel, and the number NZ of the wireless access node of B≤25% in same channel;
23) the adjacent frequency interfere information on each channel of surrounding is obtained respectively, this adjacent frequency interfere information comprises the number TY of the wireless access node of 55% > B > 25% in the number TX of the wireless access node of B >=55% in adjacent channel, adjacent channel, and the number TZ of the wireless access node of B≤25% in adjacent channel;
24) utilize formula S r=NX*100+ (NY+1/2*TY) * 10+NZ+1/4*TZ, calculate the channel interference values Sr of each channel around respectively.
5. wireless channel automatic selecting method according to claim 1 and 2, is characterized in that: in described step S3, and when the channel that channel interference values is minimum comprises two or more channel, selective channel encodes less channel as wireless channel.
6. a wireless channel automatic selective system, is characterized in that: comprise monitoring module, computing module and selection module;
Described monitoring module is used for the wireless device information around regular monitoring, and wherein wireless device information comprises the number of wireless access node, the signal strength signal intensity of each wireless access node on around each channel;
Described computing module is used for the channel interference values calculating each channel around according to wireless device information respectively;
Described selection module is used for the minimum channel of selective channel interference value as wireless channel.
7. wireless channel automatic selective system according to claim 6, is characterized in that: the automatic selection only carrying out wireless channel for 1 in 13 channels in 2.4GHz frequency range, 6 and 11 channels.
8. the wireless channel automatic selective system according to claim 6 or 7, is characterized in that: described monitoring module is every monitoring in 30 minutes wireless device information around.
9. the wireless channel automatic selective system according to claim 6 or 7, is characterized in that: described computing module calculates the channel interference values of channel in the following ways:
1) calculate the signal strength signal intensity percentage of each wireless access node according to formula B=(100+A) %, wherein, A is the signal strength signal intensity of wireless access node, and B is the signal strength signal intensity percentage of wireless access node;
2) the co-channel interference information on each channel of surrounding is obtained respectively, described co-channel interference information comprises the number NY of the wireless access node of 55% > B > 25% in the number NX of the wireless access node of B >=55% in same channel, same channel, and the number NZ of the wireless access node of B≤25% in same channel;
3) the adjacent frequency interfere information on each channel of surrounding is obtained respectively, this adjacent frequency interfere information comprises the number TY of the wireless access node of 55% > B > 25% in the number TX of the wireless access node of B >=55% in adjacent channel, adjacent channel, and the number TZ of the wireless access node of B≤25% in adjacent channel;
4) utilize formula S r=NX*100+ (NY+1/2*TY) * 10+NZ+1/4*TZ, calculate the channel interference values Sr of each channel around respectively.
10. the wireless channel automatic selective system according to claim 6 or 7, is characterized in that: in described selection module, and when the channel that channel interference values is minimum comprises two or more channel, selective channel encodes less channel as wireless channel.
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| CN109462662A (en) * | 2018-12-20 | 2019-03-12 | 深圳市银河风云网络系统股份有限公司 | A kind of gateway, Internet of Things net equipment, Internet of things system and control method |
| CN109510675A (en) * | 2018-12-24 | 2019-03-22 | 深圳市潮流网络技术有限公司 | A kind of automatic channel selection method of multiple spot AP |
| CN110049534A (en) * | 2019-03-01 | 2019-07-23 | 深圳和而泰数据资源与云技术有限公司 | WiFi access point sort method, device, computer equipment and storage medium |
| CN111491348A (en) * | 2020-04-28 | 2020-08-04 | 国家广播电视总局广播电视科学研究院 | Channel switching method and system for radio and television white spectrum cognition WiFi |
| CN111491348B (en) * | 2020-04-28 | 2022-04-19 | 国家广播电视总局广播电视科学研究院 | Channel switching method and system for radio and television white spectrum cognition WiFi |
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