CN103346825B - A kind of control method of smart antenna - Google Patents
A kind of control method of smart antenna Download PDFInfo
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- CN103346825B CN103346825B CN201310262291.7A CN201310262291A CN103346825B CN 103346825 B CN103346825 B CN 103346825B CN 201310262291 A CN201310262291 A CN 201310262291A CN 103346825 B CN103346825 B CN 103346825B
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- terminal
- antenna combination
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- message
- access point
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Abstract
The invention provides the control method of a kind of smart antenna, the method is not having the downlink transfer stage, and AP is actively polled as specific antenna combination and sends data, actively switch antenna, meet the demand of uplink, it is ensured that in the case of multi-user, do not have terminal situation hungry to death and occur.
Description
Technical field
The present invention relates to WLAN field, set particularly to wireless aps access point in WLAN
The control method of standby upper smart antenna.
Background technology
The omnidirectional antenna of current most of wireless apss use or beam antenna, so, at aerial radiation
In the range of mobile terminal can be transferred through wireless aps and be linked in the Internet, omnidirectional antenna, i.e. in level
360 ° of all homogeneous radiations are shown as on directional diagram, namely the most described non-directional.Ordinary circumstance
Lower lobe width is the least, and gain is the biggest.It is near that omnidirectional antenna is normally applied distance in a communications system, covers
Lid scope is big, low price.Gain is typically at below 9dB.Use a large number of users of antenna in whole body
Between influence each other, communication process can produce decay and interference, make communication quality be severely impacted.
In order to improve the problems referred to above, it is an object of the invention to the control method by a kind of wifi smart antenna,
Increase communication and the covering power of single wifi product, promote its radio communication quality.
In order to ensure to set up communication connection with all of mobile terminal in radiation scope, at present, have
Wireless aps access device have employed smart antenna, different from omnidirectional antenna, beam antenna, smart antenna
Having the control program for different product, AP controls different antenna sets by smart antenna control algolithm
Close, reach the purpose controlling aerial array of intelligence, in the downlink transfer stage, by signal intensity
Change selects the optimum incompatible transfer phase of antenna sets.Here, when certain is combined as optimum combination,
Smart antenna is also the most long-time selects this optimum combination, but now, the terminal in other direction may not
Can be died of hunger with wireless aps communication.
Summary of the invention
In order to overcome current wireless aps smart antenna to there may be what terminal was died of hunger during controlling
Deficiency, the present invention provides the control method of a kind of smart antenna, and the method is not having the downlink transfer stage,
AP is actively polled as specific antenna combination and sends data, actively switches antenna, meets uplink
Demand, it is ensured that in the case of multi-user, do not have terminal situation hungry to death and occur.
The technical scheme is that the control method of a kind of smart antenna, when there is no downlink transfer,
Access point apparatus actively poll antenna combination sends data, comprises the following steps:
Step A, set up terminal and optimum antenna combination mapping table；
Step B, on access point apparatus generate detection messages, intervalometer is set；
Step C, intervalometer expire；Detect whether that message etc. is to be sent, if it has, then transmission etc.
Message to be sent, resets intervalometer, otherwise turns to step D；
Step D, access point apparatus pass sequentially through optimal antenna according to mapping table and combine to accordingly
Terminal sends detection messages.
Further, in the control method of above-mentioned smart antenna: in described step A, it is to pass through
The mode of study sets up terminal and optimum antenna combination mapping table, obtains a terminal right with it
The optimal antenna combination answered comprises the following steps:
All antenna combination that step A01, statistics access point apparatus are supported；
Step A02, successively selection antenna combination communicate with described terminal；
Step A03, record under each antenna combination with signal intensity during described terminal communication；
Step A04, the antenna combination selecting signal intensity to be used time the strongest are and described terminal
Optimal antenna combines.
Further, in the control method of above-mentioned smart antenna: need in situations to learn
Practise:
When terminal associates first；
When message sends the threshold value that mortality reaches to set.
The smart antenna control method of the present invention is not having the downlink transfer stage, and AP is actively polled as specific
Antenna combination send data, actively switch antenna, meet the demand of uplink, it is ensured that many
Under user situation, do not have terminal situation hungry to death and occur.
Below in conjunction with specific embodiment, the present invention is described in more detail.
Accompanying drawing explanation
Fig. 1 is the flow chart that antenna system restarts to learn antenna combination.
Fig. 2 is that smart antenna is the need of carrying out relearning combination flow chart.
Fig. 3 is that the present invention sends polling message schematic diagram to four direction.
Fig. 4 is that smart antenna of the present invention takes turns truly flow chart.
Detailed description of the invention
Embodiment 1, the present embodiment is the process that smart antenna is controlled by a kind of AP, including following
Key step:
1, ap system lists supported antenna combination.
2, ap sets up with terminal and is connected, and sets up the corresponding relation of terminal and optimal antenna combination.
3, the new terminal setting up connection, needs to learn optimal antenna combination, during sending message, depends on
The antenna combination that secondary study is supported.
4, under the antenna combination of this study, by the message of reception obtains signal intensity.
5, the signal intensity under the antenna combination of study relatively every time, selects and records the antenna sets of optimum
Close.
6, etc. the study of all antenna combination is complete, sends data according to optimal antenna combination.
If 7 downlink transfer send mortality reaches threshold values, relearn antenna combination, and update
Terminal and antenna combination mapping table.
8, at regular intervals, poll specific antenna combination under four Main way sends message,
Purpose is by sending message, thus actively switches antenna, it is ensured that be unlikely to the situation having terminal hungry to death
Occur.
As it is shown in figure 1, ap sets up the process of terminal and optimal antenna combination mapping table.
Terminal, by study, sets up the antenna sets of optimum according to the signal intensity of different antenna combination
Close.
Step S1: this step is after system electrification is got up, all antenna combination that statistics AP is supported.
Step S2: this step is to judge whether to need study, after mainly terminal associates first, needs
Study；After message transmission mortality reaches threshold values, need study.
Step S3: this step is to select antenna combination to learn successively.
Step S4: this step is by tracer signal intensity under this antenna combination.
Step S5: this step is if also needing to study, repeats S3-S4.
Step S6: this step is that study is complete, updates the optimal antenna combination of this terminal.
The process selecting optimal antenna combination is relearned as in figure 2 it is shown, ap is terminal.
AP sends mortality according to downlink transfer, relearns selection optimal antenna combination.
Step M1: this step is that statistics sends message mortality.
Step M2: this step is according to the threshold values arranged, judges whether to need study.
Step M3: this step is to restart study.
As it is shown on figure 3, STA1 (terminal 1), STA2 (terminal 2) equal with the distance of AP (D1==D2),
After AP Yu STA1 proper communication once, the current antenna of opening on AP switches to An1 direction,
In the direction, effective coverage distance is D2；But on An7 direction, effective coverage range just shortens
For D3 (D3 may be far smaller than D2).At this moment, if STA2 message to be submitted to is to AP, then root
This realization is not.
As shown in Figure 4, ap actively poll issues, at four Main way, literary composition of delivering newspaper.
AP switching antenna actively, it is ensured that do not have terminal situation hungry to death and occur.
Step K1: this step is that intervalometer expires, starts poll.
Step K2: this step is to judge whether also to want message etc. to be sent.
Step K3: this step is if there being message, terminates, and waits that next intervalometer expires.
Step K4: this step is to send without message, is switched to given antenna combination.
Step K5: this step is actively to construct message to send.
Pass through poll, it is intended that the message of the terminal of antenna combination just can be with proper communication, it is therefore prevented that have end
The situation generation that end is hungry to death, this function is the feature of this patent.
In the present embodiment, the structure of WLAN is to have a WAP (AP), and this AP has
The terminal having the smart antenna by a lot of antenna combination and be arranged on surrounding carries out upper and lower line number by signal
According to transmission, use Wi-Fi form, after wireless local networking, need the communication to whole local
Detect, the process that namely smart antenna is learnt by AP, this process as shown in Figure 1:
First, AP adds up all of antenna combination；
Secondly, from an arbitrary terminal, these antenna combination is utilized to enter with selected terminal successively
Row communication, and record the intensity of communication every time, therefrom select the antenna corresponding to the strongest signal intensity
Combination is exactly this terminal corresponding optimum (most preferably) antenna combination.
The same process carrying out all of terminal so once learning, it is possible to find out all of terminal
Corresponding optimal antenna combination, forms mapping table.
In use, if there being new terminal to add, as above, use the mistake of study
Journey obtains the optimal antenna combination corresponding with the terminal that this is newly added, in useless mapping table.
It addition, in the course of the work, there may come a time when the optimal antenna combination meeting that certain terminal is corresponding
Moving position due to the change such as terminal of situation or its network interface card changes, performance is this terminal here
When using the combination of this optimal antenna to communicate with AP, send proposition message mortality higher, need again to lead to
The process crossing study determines the optimum antenna combination corresponding with this terminal, and updates relation table.
In the course of the work, when there is no upward signal.AP is polled process such as to all of terminal
Under:
1, AP detects either with or without downlink message need send, without downlink message need send
Then start all of terminal is polled.
2, during poll uses relation table, optimal antenna combination is man-to-man with corresponding terminal detects
Message sends, and when certain terminal has downlink message, does not the most send out detection messages, directly utilizes this end
The optimal antenna combination that end is corresponding sends downlink message to this terminal.
Claims (2)
1. the control method of a smart antenna, it is characterised in that when not having downlink transfer, access point apparatus actively poll antenna combination sends data, comprises the following steps:
Step A, set up terminal and optimum antenna combination mapping table；
In described step A, it is by the way of study, set up terminal and optimum antenna combination mapping table, obtains a corresponding optimal antenna combination of terminal and comprise the following steps:
All antenna combination that step A01, statistics access point apparatus are supported；
Step A02, successively selection antenna combination communicate with described terminal；
Step A03, record under each antenna combination with signal intensity during described terminal communication；
Step A04, the antenna combination selecting signal intensity to be used time the strongest are the optimal antenna combination with described terminal；
Step B, on access point apparatus generate detection messages, intervalometer is set；
Step C, intervalometer expire；Detect whether that message etc. is to be sent, if it has, the message that then transmission etc. are to be sent, reset intervalometer, otherwise turn to step D；
Step D, access point apparatus pass sequentially through optimal antenna combination according to mapping table and send detection messages to corresponding terminal；
It is as follows that access point apparatus is polled process to all of terminal:
Access point apparatus detects and needs to send either with or without downlink message, need transmission then to start all of terminal is polled without downlink message；
In poll employing relation table, optimal antenna combination is man-to-man with corresponding terminal carries out detection messages transmission, when certain terminal has downlink message, does not the most send out detection messages, and the optimal antenna combination directly utilizing this terminal corresponding sends downlink message to this terminal.
The control method of smart antenna the most according to claim 1, it is characterised in that: need in situations to learn:
When terminal associates first；
When message sends the threshold value that mortality reaches to set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310262291.7A CN103346825B (en) | 2013-06-27 | 2013-06-27 | A kind of control method of smart antenna |
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| CN201310262291.7A CN103346825B (en) | 2013-06-27 | 2013-06-27 | A kind of control method of smart antenna |
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| CN103346825B true CN103346825B (en) | 2016-08-10 |
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Citations (6)
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|---|---|---|---|---|
| CN1486522A (en) * | 2000-11-10 | 2004-03-31 | Am���Ź�˾ | Direction-agile antenna system for wireless communications |
| CN101034925A (en) * | 2007-04-28 | 2007-09-12 | 华为技术有限公司 | Media access control method and device for supporting the intelligent antenna application |
| CN101065912A (en) * | 2004-07-30 | 2007-10-31 | 香港应用科技研究院有限公司 | Wlan access point with extended coverage area |
| CN101084666A (en) * | 2004-06-04 | 2007-12-05 | 美商内数位科技公司 | Access point operating with a smart antenna in a wlan and associated methods |
| CN101243703A (en) * | 2005-08-22 | 2008-08-13 | 艾尔加因公司 | Optimized directional antenna system |
| CN102014435A (en) * | 2010-12-15 | 2011-04-13 | 杭州华三通信技术有限公司 | Method and control device for sharing loads in wireless local area network (WLAN) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3880554B2 (en) * | 2003-07-18 | 2007-02-14 | 松下電器産業株式会社 | Space division multiple access wireless medium access controller |
-
2013
- 2013-06-27 CN CN201310262291.7A patent/CN103346825B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1486522A (en) * | 2000-11-10 | 2004-03-31 | Am���Ź�˾ | Direction-agile antenna system for wireless communications |
| CN101084666A (en) * | 2004-06-04 | 2007-12-05 | 美商内数位科技公司 | Access point operating with a smart antenna in a wlan and associated methods |
| CN101065912A (en) * | 2004-07-30 | 2007-10-31 | 香港应用科技研究院有限公司 | Wlan access point with extended coverage area |
| CN101243703A (en) * | 2005-08-22 | 2008-08-13 | 艾尔加因公司 | Optimized directional antenna system |
| CN101034925A (en) * | 2007-04-28 | 2007-09-12 | 华为技术有限公司 | Media access control method and device for supporting the intelligent antenna application |
| CN102014435A (en) * | 2010-12-15 | 2011-04-13 | 杭州华三通信技术有限公司 | Method and control device for sharing loads in wireless local area network (WLAN) |
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| CN103346825A (en) | 2013-10-09 |
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