CN103987047B - Cluster AP channel allocation and power adjustment method for dense user area - Google Patents
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Abstract
The invention discloses a cluster AP channel allocation and power adjustment method for a dense user area. Based on the existing channel allocation and power adjustment technology, channel allocation and power adjustment are integrated through ingenious design and are made to support each other and be matched with each other, and therefore a new technology scheme is formed. The method is applied to dense area wireless AP deployment, the purpose of dense user area cluster AP deployment which can not be achieved by a single channel allocation scheme or a single power adjustment scheme can be effectively achieved, the problem of mutual interference between wireless APs is solved to the maximum degree, the signal cover is guaranteed, the bandwidth availability ratio is improved, and the method is high in practicality value and popularization value.
Description
Technical field
The present invention relates to the channel and power distributing technique of a kind of cordless communication network, are to be related to a kind of face specifically
The distribution of cluster AP channels and power regulating method to intensive user region.
Background technology
In recent years, being continuously increased with mobile subscriber number and real-time multimedia data portfolio, user is to wireless
LAN（WLAN）Increasingly improve in the demand of the aspects such as bandwidth, performance, coverage.WLAN (WLAN) possesses height
The features such as speed, easy deployment, low cost, use environment is quite varied, particularly in the hot spot region that user density is big, such as car
Stand, airport, the place such as market, it is one kind application more universal at present that wireless aps are disposed to high-density.But, also lack at present
Unified WLAN deployment and channel allocation scheme, dispose highdensity wireless aps, due to connecing in the big hot spot region of user density
Enter density high, it is easy to cause conflict increase, the situation that multiple AP shared channels distribution are interfered is even more serious, or even can go out
The interruption of existing telex network, has a strong impact on Consumer's Experience.As can be seen here, nothing in the big hot spot region of user density is efficiently solved
The channel interference problem of line AP, has become the problem of current urgent need to resolve.
In order to solve wireless aps channel disturbance, existing solution is mostly using single channel distribution or power adjustment
Scheme.Channel allocation scheme is that wireless aps distribute suitable channel, makes overall interference minimum, but due to WLAN channels itself
Limitation, can only at most realize that three channels do not have interference, as shown in Figure 1.And when AP increasing numbers and it is closer to the distance when, frequency
Road distribution yet suffers from larger interference.Power regulation scheme is using the side to reducing transmit power using co-channel (adjective) wireless aps
Formula is reducing the intensity for interfering, but power is too small to be caused effectively to cover, and bandwidth availability ratio is also decreased.
Therefore, single channel distribution or power regulation scheme is not particularly suited for the cluster AP deployment in intensive user region.
The content of the invention
It is an object of the invention to provide a kind of distribution of cluster AP channels and power adjustment side towards intensive user region
Method, single channel distribution or power regulation scheme cannot adapt to the cluster AP deployment in intensive user region in solution prior art
Problem.
To achieve these goals, the technical solution used in the present invention is as follows：
A kind of distribution of cluster AP channels and power regulating method towards intensive user region, comprises the following steps：
（1）The all RSSI values for being managed AP of initialization are -100；
（2）The final RSSI between any two AP for not determining channel is determined by way of Multiple-Scan is averaged
Value；
（3）The interference signal intensity value of each AP is determined according to the final RSSI value between AP, and according to annoyance level from weight to
Light order is ranked up to AP；
（4）Based on non-interfering channel, channel distribution is carried out to AP according to the sequencing of AP sequences；
（5）All AP for determining channels carry out station scans under total power, find channel identical and can scan from a side
To AP pair of the opposing party；
（6）Using any one AP of AP centerings as power regulating object, and channel maximum with the RSSI value of the AP is chosen
Another different AP are used as the first auxiliary check point, and another AP of channel identical is used as the second auxiliary check point；
（7）Progressively reduce the power of power regulating object, and the auxiliary check point of real-time detection first and the second auxiliary detection
The RSSI value of point, until the RSSI value of the first auxiliary check point is not less than -60dbm, and the RSSI value of the second auxiliary check point is most
It is little；
（8）Judge whether another AP of the AP centerings has carried out power adjustment, if it is, next step is performed, conversely,
Then so that from as power regulating object, selection is auxiliary as first from another AP that the RSSI value of the AP is maximum and channel is different
Test point, and another AP of channel identical are helped as the second auxiliary check point, and execution step（7）；
（9）Whether there is in the AP for judging all determination channels does not carry out AP pair of power adjustment, if it is, repeating to walk
Suddenly（6）~（8）Otherwise, then terminate.
Further, the step（2）Concrete grammar be：
First, it is all not determine that channel AP carries out station scans at least twice under total power；
Then, the RSSI value of all scannings is averaged；
Finally, RSSI relational matrix are set up, larger mean value is selected as two from two groups of RSSI of any pair AP
Final RSSI value between platform AP.
Yet further, the step（3）The interference signal intensity value of middle AP is corresponding with the AP all final
RSSI value sum.
Further, the step（4）Concrete grammar be：
（a）Judge currently with the presence or absence of the channel of unallocated AP, if it is, the sequencing sorted according to AP will be all
AP distributes to the channel of unallocated AP, conversely, then distribute the AP to the AP minimum with the AP interference signal intensities value being located
Channel；
（b）Judge whether that all AP have determined that channel, if it is, execution step（5）Otherwise, then perform（a）.
Compared with prior art, the invention has the advantages that：
（1）Both are dexterously incorporated into one based on the distribution of existing channel and power adjustment principle for the present invention,
Mutually merge, mutually support, distribute and simple power tune so as to defining a kind of new technology, and solving simple channel
Whole all insurmountable problem, i.e.,：Single channel distribution or power regulation scheme cannot adapt to the cluster in intensive user region
AP deployment issues so that be provided with unified allocative decision in intensive user regional deployment AP, and nothing can be efficiently reduced
Interference problem between line AP channels, while ensureing channel coverage, it is ensured that the effective rate of utilization of bandwidth.
（2）The technology of the present invention complexity is low, it is easy to reality, and does not result in extra hardware cost, can be effectively sharp
With radio spectrum resources, throughput of wireless networks is improved, with very high practical value and application value.
（3）Channel distribution and power adjustment are combined the present invention new technology for being formed afterwards, and its technique effect is much
More than single channel distribution and the technique effect sum of single power adjustment, enter with prominent substantive distinguishing features and significantly
Step, with very high creativeness.
Description of the drawings
Fig. 1 is the channel distribution schematic diagram of wireless network mid band allocative decision.
Fig. 2 is the schematic flow sheet of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples the invention will be further described, and embodiments of the present invention are included but is not limited to
The following example.
Embodiment
The present embodiment by taking same PE lower four radio reception devices AP1, AP2, AP3 and AP4 as an example, such as Fig. 2 institutes
Show, the channel distribution and power regulating method for above-mentioned four radio reception devices is as follows：
First, the received signal strength indicator value for initializing four radio reception devices is -100, such as table 1：
| RSSI | AP1 | AP2 | AP3 | AP4 |
| AP1 | -- | -100 | -100 | -100 |
| AP2 | -100 | -- | -100 | -100 |
| AP3 | -100 | -100 | -- | -100 |
| AP4 | -100 | -100 | -100 | -- |
Table 1
In this technology, so-called RSSI refers to received signal strength indicator, and the unit of RSSI value is dbm, presents its
He is no longer individually illustrated in content everywhere.
The equal unassigned channel of above-mentioned four radio reception devices, therefore, for above-mentioned four radio reception devices, per platform without
Line access device carries out respectively the spot scan of three secondarys, and every time scanning is obtained a RSSI value, then takes three scanning results
Mean value, obtains four radio reception devices RSSI value each other, it is assumed that four radio reception devices are each other
RSSI value is as shown in table 2：
| RSSI | AP1 | AP2 | AP3 | AP4 |
| AP1 | -- | -50 | -49 | -65 |
| AP2 | --49 | -- | -70 | -50 |
| AP3 | -50 | -67 | -- | -49 |
| AP4 | -70 | -50 | -49 | -- |
Table 2
The relational matrix of above-mentioned RSSI value is set up, selects larger from two groups of RSSI of any pair radio reception device
Average is used as the final RSSI value between two radio reception devices.For example, in table 2, the RSSI value between AP1 and AP4 for-
65, and the RSSI value between AP4 and AP1 is -70, larger average is selected as the final RSSI value between AP1 and AP4, i.e.,
For -65.
According to the method described above, table 2 is adjusted to into table 3：
| RSSI | AP1 | AP2 | AP3 | AP4 |
| AP1 | -- | -50 | -49 | -65 |
| AP2 | -49 | -- | -67 | -50 |
| AP3 | -50 | -67 | -- | -49 |
| AP4 | -65 | -50 | -49 | -- |
Table 3
On the basis of table 3, radio reception device is ranked up according to the height of RSSI value, RSSI value is larger wirelessly to be connect
Enter before equipment comes, it is specific as follows：
AP1：AP3 [- 49dbm], AP2 [- 50dbm], AP4 [- 65dbm]
AP2：AP1 [- 49dbm], AP4 [- 50dbm], AP3 [- 67dbm]
AP3：AP4 [- 49dbm], AP1 [- 50dbm], AP2 [- 67dbm]
AP4：AP3 [- 49dbm], AP2 [- 50dbm], AP1 [- 65dbm]
The RSSI value of above-mentioned each radio reception device is sued for peace, each radio reception device interference signal each other is obtained
Intensity level, it is as follows：
AP1：AP3 [- 49dbm], AP2 [- 50dbm], AP4 [- 65dbm] interference signal intensity value：-164
AP2：AP1 [- 49dbm], AP4 [- 50dbm], AP3 [- 67dbm] interference signal intensity value：-166
AP3：AP4 [- 49dbm], AP1 [- 50dbm], AP2 [- 67dbm] interference signal intensity value：-166
AP4：AP3 [- 49dbm], AP2 [- 50dbm], AP1 [- 65dbm] interference signal intensity value：-164
The sequence of radio reception device is carried out according to the size of interference signal intensity value, it is as follows：
AP1：AP3 [- 49dbm], AP2 [- 50dbm], AP4 [- 65dbm]
AP4：AP3 [- 49dbm], AP2 [- 50dbm], AP1 [- 65dbm]
AP2：AP1 [- 49dbm], AP4 [- 50dbm], AP3 [- 67dbm]
AP3：AP4 [- 49dbm], AP1 [- 50dbm], AP2 [- 67dbm]
So far, it is assumed that non-interfering 1,6,11 3 unallocated radio reception devices of channel in Fig. 1, then according to above-mentioned
Ranking results, are first AP1 channel distributions, because channel 1,6,11 is sky, therefore AP1 are distributed into channel 1；Then from
The radio reception device AP3 of a unassigned channel maximum with AP1 annoyance levels is selected in the RSSI relational matrix of table 3, it is right
AP3 carries out channel distribution, and now, channel 6,11 remains as sky, therefore, AP3 is distributed into channel 6；Then again from table 3
The radio reception device AP4 of a unassigned channel maximum with AP3 annoyance levels is selected in RSSI relational matrix, AP4 is entered
Line frequency road distributes, and now, is only left channel 11 for sky, then directly distribute AP4 into channel 11.In the same manner, the RSSI in table 3 is closed
It is that a radio reception device AP2 maximum with AP4 annoyance levels is selected in matrix, channel distribution is carried out to it.Due to now
Non-interfering channel 1,6,11 has been assigned radio reception device, is to reduce as much as possible between two radio reception devices
Interference, then select the channel being located with the most weak radio reception device of AP2 annoyance levels, distribute to AP2.From above-mentioned
As can be seen that with AP2 interference signal intensities value most during the radio reception device carried out according to interference signal intensity value size sorts
It is little for AP3, therefore the channel 6 that AP3 is located is distributed to into AP2, i.e. AP2, AP3 while distributing into channel 6.
In above-mentioned channel assigning process, the order that uses of the channel of unallocated radio reception device can flexibly be changed,
Not necessarily it is allocated according to the sequencing of above-mentioned channel 1,6,11, for example：Above-mentioned AP1 can also be distributed to channel 6,
AP3 is distributed to into channel 11.As long as the channel is not yet assigned radio reception device, you can arbitrarily use.
Now, four radio reception devices have all distributed into channel.In order to further reduce four wireless access
Interference between equipment, improves signal coverage rate and bandwidth availability ratio, four radio reception devices to above-mentioned channel distribution
Station scans are carried out under total power, it is identical to find channel, and can wirelessly be connect to another from a radio reception device scanning
Enter a pair of AP of equipment, i.e. AP2 and AP3.
Assume AP2 as power regulating object, choose and the RSSI value between AP2 is maximum, and the nothing that channel is differed
Line access device AP1 is aided in AP2 channels identical radio reception device AP3 as the first auxiliary check point as second
Test point.Using progressively reducing by the way of AP2 power, check corresponding on the first auxiliary check point and the second auxiliary check point
RSSI value, until making the RSSI value of the second auxiliary check point as far as possible little, and the RSSI value on the first auxiliary check point not less than-
Till 60dbm, the effective coverage range of AP2 had so both been ensure that, it is ensured that the utilization rate of bandwidth, and substantially reduced
Interference between AP2 and AP1, AP3.
Then, it is power regulating object to select with AP2 co-channel (adjective)s AP3, chooses and the RSSI value between AP3 is maximum, and
The radio reception device AP4 that channel is differed as the first auxiliary check point, and with AP3 channel identical radio reception devices
AP2 is used as the second auxiliary check point.Using progressively reducing by the way of AP3 power, in the first auxiliary check point and the second auxiliary inspection
Corresponding RSSI value is checked on measuring point, until making the RSSI value of the second auxiliary check point as far as possible little, and on the first auxiliary check point
RSSI value not less than till -60dbm, so both having ensure that the effective coverage range of AP3, and substantially reduce AP3 with
Interference between AP4, AP2.
Finally judge whether also there be AP pair that does not carry out power adjustment again, if it is present repeating the work(of above-mentioned AP pair
Rate adjusts process, otherwise then terminates.In the present embodiment, only AP2 and a pair of AP3, therefore adjust in the power for completing AP2 and AP3
After whole, power adjustment terminates.
By said method, both realized carries out cluster AP deployment in close quarters, and substantially reduces compact district
Signal interference in domain between wireless aps, it is ensured that bandwidth availability ratio, the cluster AP deployment for close quarters provides a system
One scheme, opens the brand-new road of close quarters AP deployment, more excellent applied environment is provided for wireless aps, with very high
Practical value and promotional value.
Above-described embodiment is only the preferred embodiments of the present invention, not limiting the scope of the invention, as long as using
The design principle of the present invention, and the change for carrying out non-creativeness work on this basis and making, all should belong to the present invention's
Within protection domain.
Claims (3)
1. a kind of distribution of cluster AP channels and power regulating method towards intensive user region, it is characterised in that including following
Step：
（1）The all RSSI values for being managed AP of initialization are -100；
（2）The final RSSI value between any two AP for not determining channel is determined by way of Multiple-Scan is averaged；
（3）The interference signal intensity value of each AP is determined according to the final RSSI value between AP, and according to annoyance level from weight to light
Order is ranked up to AP；
（4）Based on non-interfering channel, channel distribution is carried out to AP according to the sequencing of AP sequences, it is specific as follows：
（a）Judge currently with the presence or absence of the channel of unallocated AP, if it is, the sequencing sorted according to AP divides all AP
It is assigned in the channel of unallocated AP, conversely, the AP then to be distributed the frequency being located to the AP minimum with the AP interference signal intensities value
Road；
（b）Judge whether that all AP have determined that channel, if it is, execution step（5）Otherwise, then perform（a）；
（5）All AP for determining channels carry out station scans under total power, find channel identical and can be from side scanning to another
AP pair of one side；
（6）Using any one AP of AP centerings as power regulating object, choose maximum from the RSSI value of the AP and channel is different
Another AP as the first auxiliary check point, and another AP of channel identical is used as the second auxiliary check point；
（7）Progressively reduce the power of power regulating object, and the auxiliary check point of real-time detection first and the second auxiliary check point
RSSI value, until the RSSI value of the first auxiliary check point is not less than -60dbm, and the RSSI value of the second auxiliary check point is minimum；
（8）Judge whether another AP of the AP centerings has carried out power adjustment, if it is, perform next step, conversely, then with
From as power regulating object, choose and detected as the first auxiliary from another AP that the RSSI value of the AP is maximum and channel is different
Point, and another AP of channel identical is used as the second auxiliary check point, and execution step（7）；
（9）Whether there is in the AP for judging all determination channels does not carry out AP pair of power adjustment, if it is, repeat step
（6）~（8）Otherwise, then terminate.
2. a kind of distribution of cluster AP channels and power regulating method towards intensive user region according to claim 1,
Characterized in that, the step（2）Concrete grammar be：
First, it is all not determine that channel AP carries out station scans at least twice under total power；
Then, the RSSI value of all scannings is averaged；
Finally, RSSI relational matrix are set up, larger mean value is selected from two groups of RSSI of any pair AP as two AP
Between final RSSI value.
3. a kind of distribution of cluster AP channels and power regulating method towards intensive user region according to claim 1,
Characterized in that, the step（3）The interference signal intensity value of middle AP is all final RSSI value sum corresponding with the AP.
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| CN104684013B (en) * | 2015-02-10 | 2018-06-22 | 深圳市盛路物联通讯技术有限公司 | The anti-interference method and device of wireless telecommunications |
| CN105357766B (en) * | 2015-09-29 | 2018-08-28 | 西南交通大学 | A kind of train radio network channel distribution method |
| CN105228165B (en) * | 2015-10-16 | 2019-02-15 | 中国联合网络通信集团有限公司 | A kind of AP coverage area method of adjustment and device |
| CN105611547B (en) * | 2015-12-22 | 2019-02-01 | 中国科学院计算技术研究所 | The method and system that the energy consumption of multi-channel wireless network is adjusted |
| CN106060835B (en) * | 2016-05-05 | 2019-07-19 | 锐捷网络股份有限公司 | A kind of WLAN anti-disturbance method and wireless lan controller |
| CN107690151B (en) * | 2016-08-06 | 2021-01-19 | 国基电子（上海）有限公司 | System and method capable of sensing interference source |
| CN108260196B (en) * | 2016-12-28 | 2021-03-09 | 中国移动通信集团北京有限公司 | Method and device for controlling transmitting power |
| CN108718453B (en) * | 2018-06-15 | 2022-03-25 | 合肥工业大学 | Regional networking method under high-density WLAN scene |
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| CN101558669A (en) * | 2006-12-12 | 2009-10-14 | 艾利森电话股份有限公司 | Method and arrangement for locating areas having poor radio coverage |
| CN101714935A (en) * | 2008-10-08 | 2010-05-26 | 中国移动通信集团公司 | WLAN high-density user coverage method and system thereof under open environment, and centralized controller |
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