CN103346826A - Method for selecting intelligent antenna and access point - Google Patents
Method for selecting intelligent antenna and access point Download PDFInfo
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- CN103346826A CN103346826A CN2013102715540A CN201310271554A CN103346826A CN 103346826 A CN103346826 A CN 103346826A CN 2013102715540 A CN2013102715540 A CN 2013102715540A CN 201310271554 A CN201310271554 A CN 201310271554A CN 103346826 A CN103346826 A CN 103346826A
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Abstract
The invention provides a method for selecting an intelligent antenna and an access point. The method for selecting the intelligent antenna comprises the steps that (1) the AP determines a first station from stations, the value of the communication quality of the first STA is smaller than a preset quality threshold value, and the flow requirement of the first STA is higher than a preset flow requirement; (2) the AP sends an active training message to the first STA in the directions of antennas of an antenna array in a training period of the first STA, and obtains a training result which corresponds to the active training message; (3) the AP selects an optimal antenna from the antenna array according to the training result; (4) the AP uses the optimal antenna to send a user message to the first STA. According to the method for selecting the intelligent antenna, due to the facts that the AP sends the active training message to the first STA which is poor in communication quality but has a certain need for flow, and increases user flow by sending the active training message, the AP helps the first STA to select the optimal antenna as soon as possible.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of system of selection and access point of smart antenna.
Background technology
It is big that traditional antenna has angle of coverage, but the little shortcoming of coverage, and the appearance of smart antenna can be passed through Dynamic Selection different antennae array combination, can realize comprehensive covering all angles, can obtain bigger coverage in each angle again.As access point (Access Point, be called for short AP) need be website (STATION, abbreviation STA) selects optimal aerial array, AP can send message by the aerial array to different directions, pick out optimum aerial array by a series of determination strategy then, to guarantee transmission quality as far as possible.
In the prior art, the selection of aerial array need rely on user's normal discharge, when customer flow is big, can finish training fast, here training refers to, select the antenna of an optimum for STA in a plurality of directions of aerial array, as the process of the transmitting antenna of STA, and when customer flow hour, training is then slowly carried out.It is because the traffic demand of user own is little that but prior art can't be distinguished the little reason of customer flow, still causes speed low because environment of living in is abominable, and it is little to cause the unit interval flow.For because environment of living in badly causes speed low, cause the little STA of unit interval flow, can't pick out optimum aerial array for a long time.Simultaneously, because wireless network possesses sharing, in co-existence network, if there is the second-rate STA of indivedual initial communication, will certainly have influence on the proper communication of other STA, in the smart antenna training process, even individual communication quality STA has preferably been picked out the optimal antenna array fast, if exist part STA relatively poor because of communication environment of living in, cause this STA and can't pick out the optimal antenna array for a long time, then from the utilance of eating dishes without rice or wine, whole Netcom letter quality can be subjected to very big influence, and the training time is long, and the accuracy rate that may cause owing to the factors such as change of STA position training also can descend.
Summary of the invention
The invention provides a kind of system of selection and access point AP of smart antenna, can help the communication quality difference but STA with certain flow demand picks out optimal antenna fast.
First aspect present invention provides a kind of system of selection of smart antenna, comprising:
Access point AP determines a STA from each site STA, the communication quality of a described STA is lower than default quality threshold, and the traffic demand of a described STA is higher than the preset flow demand;
Described AP initiatively trains message to described STA transmission on each antenna direction of aerial array in the training period of a described STA, and obtain described training result of initiatively training the message correspondence;
Described AP selects optimal antenna according to described training result from described aerial array;
Described AP adopts described optimal antenna to send user's message to a described STA.
Aforesaid method, wherein, described AP determines a STA from each STA, comprising:
Described AP determines present rate less than the 2nd STA of first threshold from each STA, the communication quality of described the 2nd STA is lower than default quality threshold;
Described AP determines that from described the 2nd STA the ratio of present flow rate and present rate is greater than a STA of second threshold value.
Aforesaid method, wherein, described obtaining after the described training result of initiatively training the message correspondence also comprises:
Described AP upgrades present rate and the present flow rate corresponding with a described STA according to described training result.
Aforesaid method, wherein, described AP in the training period of a described STA send to a described STA on each antenna direction of aerial array initiatively train message before, also comprise:
Described AP determines whether a described STA is carried out the active training according to current interface-free resources occupied information;
If then described AP carries out to a described STA and sends the step of initiatively training message.
Aforesaid method, wherein, described interface-free resources occupied information comprises at least a in the following information:
Resource free time degree, message number to be sent, available buffering area, the utilance of eating dishes without rice or wine, carry out the initiatively number of the STA of training.
Second aspect present invention provides a kind of access point AP, comprising:
Determination module is used for determining a STA from each site STA that the communication quality of a described STA is lower than default quality threshold, and the traffic demand of a described STA is higher than the preset flow demand;
Sending module was used for initiatively training message to described STA transmission on each antenna direction of aerial array in the training period of a described STA;
Acquisition module is used for obtaining described training result of initiatively training the message correspondence;
Antenna Selection Module is used for according to described training result, selects optimal antenna from described aerial array;
Described sending module also is used for, and adopts described optimal antenna to send user's message to a described STA.
Aforesaid AP, wherein, described determination module specifically is used for:
Determine present rate less than the 2nd STA of first threshold from each STA, the communication quality of described the 2nd STA is lower than default quality threshold;
Determine that from described the 2nd STA the ratio of present flow rate and present rate is greater than a STA of second threshold value.
Aforesaid AP wherein, also comprises:
Update module is used for according to described training result, upgrading present rate and the present flow rate corresponding with a described STA after described acquisition module obtains described training result of initiatively training the message correspondence.
Aforesaid AP, wherein, described determination module also is used for, described sending module in the training period of a described STA, send to a described STA on each antenna direction at aerial array initiatively train message before, determine whether that according to current interface-free resources occupied information a described STA is carried out active to be trained;
If then described sending module is initiatively trained message to described STA transmission to described on each antenna direction of aerial array.
Aforesaid AP, wherein, described interface-free resources occupied information comprises at least a in the following information:
Resource free time degree, message number to be sent, available buffering area, the utilance of eating dishes without rice or wine, carry out the initiatively number of the STA of training.
The system of selection of smart antenna provided by the invention, AP is by to the communication quality difference but the STA with certain flow demand, send and initiatively train message, initiatively train message to increase customer flow by sending, thereby help a STA to pick out optimal antenna as soon as possible, the normal discharge that other STA then relies on the user carries out passive exercise, by initiatively training and passive exercise mode combine, when the relatively poor STA of this class communication quality was benefited, the utilance of eating dishes without rice or wine of whole net also can increase.
Description of drawings
Fig. 1 is the flow chart of the system of selection embodiment one of smart antenna of the present invention;
Fig. 2 is the flow chart of the system of selection embodiment two of smart antenna of the present invention;
Fig. 3 is the flow chart of the system of selection embodiment three of smart antenna of the present invention;
The structural representation of the AP that Fig. 4 provides for the embodiment of the invention four.
Embodiment
Fig. 1 is the flow chart of the system of selection embodiment one of smart antenna of the present invention, and as shown in Figure 1, the system of selection of the smart antenna that present embodiment provides specifically comprises the steps:
Step 101, AP determine a STA from each STA, the communication quality of a STA is lower than default quality threshold, and the traffic demand of a STA is higher than the preset flow demand.
When AP has data to send to each STA, obtain communication quality and the traffic demand of each STA, communication quality is lower than default quality threshold, and the STA that traffic demand is higher than the preset flow demand is defined as a STA.Wherein, each STA is all STA that refer to an access this AP, communication quality can be determined according to speed, packet loss and the signal strength signal intensity indication etc. of STA, traffic demand determines that according to the present flow rate of STA AP obtains communication quality and the traffic demand of each STA by speed, packet loss, signal strength signal intensity indication and the flow etc. of real-time each STA of statistics.
Step 102, AP initiatively train message to STA transmission on each antenna direction of aerial array in the training period of a STA, and obtain the training result of initiatively training the message correspondence.
The one STA is communication quality difference but STA with certain flow demand, because the communication quality of a STA is poor, correspondingly, its transmission rate is also low, in order to help this class STA to pick out optimal antenna as soon as possible, AP need initiatively train message to STA transmission, and obtain the training result of initiatively training message in the training period of a STA on each antenna direction of aerial array.Have only the STA of working as in training period, just STA is carried out active or passive exercise, for STA picks out optimal antenna, after picking out optimal antenna for STA, this training period, finish, and adopts the optimum of picking out to send user's message to STA in non-training period.
In the present embodiment, initiatively train message both to comprise that special-purpose training message also comprised user's message, user's message refers to user's normal discharge, special-purpose training message is that AP is exclusively used in the message that carries out the active training, it or not user's normal discharge, AP initiatively sends some special-purpose training messages to STA, to increase user's flow, thereby make AP to pick out optimal antenna for a STA as soon as possible, be understandable that, AP is when carrying out initiatively training, and not distinguishing and initiatively training message is special-purpose message or user's message, and unification is considered as customer flow with message.
In the present embodiment, AP only sends to the STA in training period and initiatively trains message, therefore, AP needs also to judge whether STA is in training period, in a kind of implementation, AP judges after step 101 whether STA is in training period, namely travel through after each STA determines a STA, judge then whether STA is in training period, if in training period, then send special-purpose training message to STA, if not in training period, then STA is not trained, use historical optimal antenna to send normal user's message to STA, historical optimal antenna is the optimal antenna that AP selected for this STA in a last training period; In the another kind of implementation, AP judged before step 101 whether STA is in training period, to being in the STA in training period, further determine a STA according to signal quality and traffic demand, STA in the training period sends and initiatively trains message then, initiatively trains message to comprise that special use trains message and user's message.For other STA except a STA in training period, then adopt the mode of passive exercise, namely rely on user's normal discharge and pick out optimal antenna.It should be explicitly made clear at this point, in various embodiments of the present invention, initiatively training refers to that AP passes through to send special-purpose training message to STA, train the training result of message and user's normal users message correspondence according to this special use, for STA selects optimal antenna, compare with user's message, do not comprise user data in the special-purpose training message, the present invention does not limit for the form of special-purpose message, existing any message can be adopted, identification information can also be comprised in this special use training message, so that AP is when carrying out traffic statistics, distinguishing this message is still special-purpose training message of user's message, and AP only adds up user's message.And passive exercise refers to, AP can only be according to user's normal discharge, for STA selects optimal antenna.For those communication quality differences but possess the STA of certain flow demand, because customer flow is little, AP is by initiatively sending some special-purpose training messages to STA, to increase customer flow, and as early as possible for STA picks out optimal antenna,
How to judge whether STA is in training period, is prior art, only do simple introduction here: first kind of situation, flow according to the user judged whether in training period, if customer flow reaches default value, then judged STA and was in training period, need train it, select optimal antenna.Second kind of situation judged according to the ageing time that arranges, when ageing time then, illustrate that STA is in training period, need train it.Certainly can also determine that for example the throughput of STA perhaps when STA rigidly connects into AP, also needs it is trained according to other information.
AP obtains training result according to the message of initiatively training that sends after initiatively training message to the STA transmission, select optimal antenna according to training result from aerial array.Following elder generation simply introduces rate consulation process between AP and the STA, in message transmission procedure, each message that transmit leg sends, the recipient is receiving that all will carry out ACK replys affirmation, receive the ACK affirmation of recipient's transmission when transmit leg after, assert that just message has sent success, thereby send the next frame data, send otherwise transmit leg carries out message again.When message sent successfully, transmit leg improved the speed that sends, and sent message with higher speed, if still success can continue to improve speed.After message sends failure, under same speed, send again, this moment, transmit leg and recipient still used the message affirmation mechanism to carry out the reliability affirmation, if still can't retransmit success, retransmit behind the transmit leg changing down, to a suitable speed, under this speed, message can normal transmission at this up to negotiation.
Below inciting somebody to action specifically for instance, how bright AP selects optimal antenna, carry out in the process of initiatively training at the STA of AP, AP initiatively trains message to the STA transmission with first rate on the first direction of aerial array, first rate is greater than the present rate of STA, after AP initiatively trains message to the STA transmission, STA returns an ACK message to AP, if message transmissions success, then AP sends message with the second higher speed to STA, if send successfully, then sends to STA with higher third speed and initiatively trains message, if send failure, then resend with third speed, if send successfully, then with third speed as the flank speed on first direction, if send failure, then with second speed as the high transmission rate on the first direction, wherein, third speed〉second speed first rate.Then, AP sends message in the other direction with the flank speed on the first direction, if all directions on message all send failure, then with the antenna on the first direction as optimum transmitting antenna.If on other directions, can also send message with higher speed, then with the antenna of correspondence as optimal antenna.If there is the flank speed on certain several direction all identical, then further according to out of Memory such as signal strength signal intensity indication or packet loss, determine an optimum transmitting antenna.
Need to prove, in the present embodiment, initiatively train message to comprise special-purpose training message and user's message, when AP send be special-purpose training message the time, if send failure, then AP does not need to retransmit, and sends a new special use training message with identical speed, when send be user's message the time, need retransmit user's message.Present embodiment does not limit the order that sends special-purpose training message and user's message, and AP is still according to existing mechanism, and which message arrives first, and sends which message earlier.How according to training result, selecting optimal antenna is prior art, and above-mentioned example is explanation for example just, and the present invention does not limit how to select optimal antenna according to training result, can also select optimal antenna by other means.
When AP is after a STA picks out optimum antenna, optimal antenna as transmitting antenna, is sent user's message to a STA.
The method that present embodiment provides, AP is by to the communication quality difference but the STA with certain flow demand, send and initiatively train message, initiatively train message to comprise special-purpose training message and user's message, increase customer flow by sending special-purpose training message, thereby help a STA to pick out optimal antenna as soon as possible.
Fig. 2 is the flow chart of the system of selection embodiment two of smart antenna of the present invention, how present embodiment specifically describes AP for STA selects optimal antenna, as shown in Figure 2 on the basis of embodiment one, the system of selection of the smart antenna that present embodiment provides specifically comprises the steps:
If namely in training period, then execution in step 202; If not, namely not in training period, use historical optimal antenna to send user's message as transmitting antenna to STA.Concrete judgment mode can be with reference to the description of embodiment one, here repeat no more, alternatively, this step is carried out after also can being placed on step 203, different is, be placed on after the step 203, AP only judges that whether a STA is in training period, rather than judge that whether all STA are in training period, STA in training period just sent initiatively train message, this is initiatively trained and comprises special-purpose training message in the message, and the STA in training period is not trained, and adopts historical optimal antenna to send user's message to STA.
At first, AP need obtain the present rate of each STA, compares the size of present rate and first threshold then, present rate illustrates that less than first threshold the speed of STA is lower, and present rate is greater than first threshold, illustrate that STA speed is higher, communication quality is better, does not need to carry out the active training.The present rate of STA changes, the present rate of each STA of statistics that AP can be real-time.First threshold is got 1/3rd value of the supported flank speed of STA and minimum speed limit usually, after STA inserts AP, the supported flank speed of STA and minimum speed limit all are a definite value, for example, the supported flank speed of STA is 80Mbps, and minimum speed limit is 50Mbps, and then first threshold is 60Mbps, when the present rate of STA is lower than 60Mbp, it is defined as the 2nd STA.Certainly, also can determine first threshold by other means, for example determine first threshold according to the historical experience value, perhaps get the median of STA flank speed and minimum speed limit as first threshold, the present invention is not to this restriction.For different STA, first threshold can be identical, also can be different, and AP can be set to the first threshold of all STA a fixing value, can be different with minimum speed limit according to the supported flank speed of each STA, different STA is arranged different first thresholds.AP passes through to compare the present rate of each STA and the size of first threshold, if the STA present rate less than first threshold, then is defined as the 2nd STA with this STA, the communication quality of the 2nd STA is lower than default quality threshold.In the present embodiment, the 2nd STA that determines is the low STA of speed, does not need to carry out the active training for STA at a high speed, adopts the mode of passive exercise just can pick out optimum antenna for STA fast.
After AP determines the 2nd STA that communication quality is lower than default quality threshold, whether the present flow rate of each the 2nd STA of judgement and the ratio of present rate is greater than second threshold value, present flow rate also is the flow results of real-time statistics, if greater than second threshold value, then the 2nd STA is defined as a STA, the ratio of present flow rate and present rate is more big, illustrate that traffic demand is more big, second threshold value can be calculated average throughput and the Mean Speed of this STA in the unit interval by the weighted average algorithm, then with the ratio of average throughput and Mean Speed as second threshold value, therefore, second threshold value of different STA can be the same or different.In the present embodiment, at first having determined this STA in step 201 is the STA of low speed, this low speed STA is if itself have certain flow, then the ratio of present flow rate and present rate is big, if the traffic demand of this low speed STA own is little, then present flow rate is also little, the ratio of present flow rate and present rate will be more little, therefore, can determine according to the ratio of present flow rate and present rate whether STA possesses the certain flow demand, a STA who determines is that traffic rate is low, and the STA with certain flow demand, therefore, can determine that a STA traffic rate is low owing to low environmental quality of living in causes, need carry out the active training for this class STA.If the STA's of low speed, the traffic demand of itself is little, does not also need to carry out the active training, and initiatively training can be wasted interface-free resources on the contrary.
If, namely a STA is carried out the active training, then AP carries out to a STA and sends the step of initiatively training message, and namely execution in step 205.Wherein, the interface-free resources occupied information comprises at least a in the following information: resource free time degree, message number to be sent, available buffering area, the utilance of eating dishes without rice or wine, carry out the initiatively number of the STA of training.AP determines whether comprehensively that according to arbitrary one or its combination of above-mentioned interface-free resources occupied information a STA is carried out active to be trained.If resource free time degree greater than threshold value, illustrates that then the resource free time degree of AP is bigger, available surplus resources is more, at this moment, can carry out the active training to STA.For message number to be sent, when message number to be sent surpasses threshold value, illustrate that message to be sent is more, if carry out the active training this moment, can influence the transmission of other STA normal users messages, carry out the active training, can reduce the utilance of eating dishes without rice or wine on the contrary.For available buffering area, available buffering area is greater than threshold value, illustrate that available buffering area is more, can carry out the active training, when the utilance of eating dishes without rice or wine is lower than a certain threshold value, STA is carried out the active training, and the number of the STA of training surpasses threshold value when carrying out initiatively, then STA is not carried out the active training.Also comprehensive one or more of above-mentioned resource information can be assessed, judge whether STA is carried out the active training.The idling-resource that can use as AP more after a little while, initiatively training can reduce the utilance of eating dishes without rice or wine of AP on the contrary.When the resource occupation information according to AP, when determining STA not to be carried out initiatively training.AP does not send special-purpose training message to STA, but utilizes the normal user's message of a STA to carry out passive exercise.
Therefore, the method that present embodiment provides, the mode of active training and passive exercise is combined, present rate by assessment STA, present flow rate information and in conjunction with the system resource situation of AP, select whether STA to be carried out the active training, to avoid the multi-user or to carry out the active training for a long time, cause the load of AP overweight.
In the present embodiment, initiatively train message to comprise special-purpose training message and user's message, AP is to the STA in training period, on each antenna direction of aerial array, initiatively train message to STA transmission, and according to initiatively training message to obtain on each antenna direction corresponding training result, training result is information such as the present rate, packet loss, signal strength signal intensity indication of a STA.Each antenna direction of aerial array is called a training antenna, initiatively trains message by sending at a plurality of training antennas, and obtains the training result of respectively training the antenna correspondence, picks out optimal antenna from a plurality of training antennas.
AP upgrades present rate and the present flow rate corresponding with a STA after obtaining the training result of initiatively training the message correspondence.In fact, no matter whether STA is in training period, after AP sends message to STA at every turn, present rate and the present flow rate of this STA correspondence upgraded in the capital, here present flow rate refers to the flow of user's reality, do not comprise the special use training message that AP sends, therefore, AP is when the statistics customer flow, and the message that needs identification to send is user's message or special-purpose training message, for special use training message, AP does not calculate it in customer flow when statistics, and customer flow includes only user's message, particularly, can in message, carry identification information, so that AP determines that according to identification information user's message still is special-purpose training message.
This step can so repeat no more, need to prove that the execution sequence of step 206 and step 207 does not limit with reference to the description among the embodiment one, and step 206 is carried out after also can being placed on step 207.Carry out in the process of initiatively training at AP, each training antenna is all carried out the active training, and respectively train the training result of antenna, select optimal antenna in a plurality of training antennas from aerial array.Particularly, to each training antenna when training, AP can repeatedly attempt sending to STA with higher speed and initiatively train message, and determines flank speed on this training antenna according to the speed of this message of transmission and packet loss etc.Then, respectively train the flank speed on the antenna, determine that the antenna of an optimum is as transmitting antenna.
Need to prove, in the present embodiment, AP, can declare by following dual mode: a kind of mode when determining whether STA carried out initiatively training at each STA of traversal, AP in a certain order, determine earlier a STA, the resource occupation information according to present rate, present flow rate and the AP of this STA judges whether that this STA is carried out active to be trained then, after having judged, return to carry out and judge that whether next STA carries out the active training, has traveled through all STA successively.In the another kind of mode, AP at first determines the 2nd STA according to the speed of each STA, according to the flow of each STA, determines a STA in the 2nd STA then, determines needs according to the resource occupation information of AP in a STA then and carries out the initiatively STA of training.By above-mentioned dual mode, AP can both travel through all STA, determines and need carry out the initiatively STA of training.Wherein.AP is all STA of circulative traversal always, determine whether to carry out the active training to STA, and the STA that needs carry out initiatively training is sent special-purpose training message, so that AP can pick out optimal antenna for this STA as soon as possible.Because the resource of AP is limited, the detection of carrying out initiatively training also can take the resource of AP, therefore, monitoring period can be set, and AP only travels through STA in monitoring period, determines to carry out the initiatively STA of training.
The method that provides by present embodiment, mode by initiatively training is picked out optimal antenna as soon as possible for communication quality STA relatively poor, that possess the certain flow demand fast, and can utilize user's normal discharge to carry out passive exercise for other STA, initiatively training and passive exercise mode combine, when the relatively poor STA of this class communication quality was benefited, the utilance of eating dishes without rice or wine of whole net also can increase.
Fig. 3 is the flow chart of the system of selection embodiment three of smart antenna of the present invention, on the basis of embodiment two, how present embodiment specifies AP according to initiatively training message to select optimal antenna, present embodiment is the specific descriptions to step 207 among the embodiment two, in embodiment two, step 201 judges whether and need carry out the active training to STA in 205, do not carry out initiatively training to being in the STA in training period if judge, can utilize user's normal discharge to carry out passive exercise, and carry out the initiatively STA of training for needs, AP can send special-purpose training message, utilizes the user's message of STA self and initiatively trains message to finish training jointly.But no matter need to prove, be initiatively to train or passive exercise, and AP is when training, and not removing to distinguish this message is special-purpose training message or user's message, and unification is considered as customer flow with it and trains.As shown in Figure 3, the method that provides of present embodiment specifically may further comprise the steps:
Step 301, when message sends, judge that whether STA is in training period.
If then execution in step 302, if not, then execution in step 303.In this step, when message passed through, this message may be user's message, also may be special-purpose training message.When STA was carried out initiatively training, this message can be user's message and special-purpose training message, and when STA was carried out passive exercise, this message can only be user's message.But AP according to training result, when selecting optimal antenna, does not consider that this message is user's message or special-purpose training message after sending message.
Step 302, select the training antenna, will train antenna as transmitting antenna.
When message passes through, judge whether in training period, be then to use the training antenna of smart antenna module output of this AP as the transmitting antenna of this message, because the antenna array of AP is shown a plurality of antennas, AP can travel through all training antennas in a kind of mode, therefrom select an optimal antenna, in the another kind of mode, pick out certain several antenna as the training antenna by certain algorithm, from these several training antennas, select one then as optimal antenna, select some antennas as the training antenna earlier.If STA not in training period, then uses historical optimal antenna to send this message.
Step 303, select historical optimal antenna as transmitting antenna, execution in step 304.
For the STA in training period not, do not need to train, then will last optimal antenna as transmitting antenna, this history optimal antenna is the optimal antenna of selecting in training period last time.
The transmitting antenna that step 304, use are selected sends message to STA.
The transmitting antenna here can be historical optimal antenna, also can be the training antenna.
Step 305, judge that whether STA is in training period.
Because AP is when sending message to this STA, also send message to other STA, and other STA may be in training period, mustn't upgrade physical training condition for the STA in training period not, carry out subsequent step, and have only the STA in training period just to upgrade physical training condition, therefore, after message is sent completely, need also to judge that whether STA is in training period, be execution in step 306 then, otherwise, execution in step 307.
Step 306, obtain training result, upgrade physical training condition.
If STA is in training period, the corresponding information of training antenna is updated to smart antenna module, so that renewal physical training condition, here physical training condition refers to that AP sends the speed of user's message at the training antenna of current use, whether send success, and packet loss, information such as signal strength signal intensity indication, in the present embodiment, can also comprise the flow information of STA in the physical training condition of renewal.If training is finished then is withdrawed from training, export optimal antenna simultaneously, if do not finish training, then execution in step 307, the single training finishes,, continue to wait for the transmission of message next time, repeat above-mentioned steps, upgrade training result, up to picking out optimal antenna.
Step 307, single finish.
What said process was described is the process of single training, and in a training period, AP need repeat repeatedly to train, and could pick out optimal antenna in a plurality of training antennas, after the single training finishes, continues training next time, repeated execution of steps 301-307.
Need to prove, the method that various embodiments of the present invention provide, the STA of not only can be to the communication quality difference but possessing the certain flow demand carries out the active training, can also under some other scene, use, for example judge whether STA is carried out the active training according to user's priority, adopt for the user of high priority initiatively to be trained for STA and to pick out optimal antenna fast.The method that various embodiments of the present invention provide not only can be applied to existing Wi-Fi network, also can be applied in other the wireless technology.
The structural representation of the AP that Fig. 4 provides for the embodiment of the invention four, as shown in Figure 4, the AP that present embodiment provides comprises: determination module 41, sending module 42, acquisition module 43, Antenna Selection Module 44.
Wherein, determination module 41 is used for determining a STA from each site STA that the communication quality of the one STA is lower than default quality threshold, and the traffic demand of a STA is higher than the preset flow demand;
Sending module 42 was used for initiatively training message to STA transmission on each antenna direction of aerial array in the training period of a STA;
Acquisition module 43 is used for obtaining described training result of initiatively training the message correspondence;
Antenna Selection Module 44 is used for according to described training result, selects optimal antenna from aerial array;
Sending module 42 also is used for, and adopts optimal antenna to send user's message to a STA.
Determination module 41 specifically is used for: determine present rate less than the 2nd STA of first threshold from each STA, the communication quality of the 2nd STA is lower than default quality threshold; Determine that from the 2nd STA the ratio of present flow rate and present rate is greater than a STA of second threshold value.Determination module 41 also is used for, sending module 42 in the training period of a STA, send to a STA on each antenna direction at aerial array initiatively train message before, determine whether that according to current interface-free resources occupied information a STA is carried out active to be trained; If then sending module 42 is to initiatively train message to STA transmission on each antenna direction of aerial array.
Wherein, the interface-free resources occupied information comprises at least a in the following information: resource free time degree, message number to be sent, available buffering area, the utilance of eating dishes without rice or wine, carry out the initiatively number of the STA of training.
The AP that present embodiment provides can also comprise update module, is used for according to training result, upgrading present rate and the present flow rate corresponding with a STA after acquisition module 43 obtains the training result of initiatively training the message correspondence.
The AP that present embodiment provides can carry out above-mentioned arbitrary method embodiment, and specific implementation and technique effect are similar, repeat no more here.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each method embodiment can be finished by the relevant hardware of program command.Aforesaid program can be stored in the computer read/write memory medium.This program is carried out the step that comprises above-mentioned each method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although the present invention has been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the system of selection of a smart antenna is characterized in that, comprising:
Access point AP determines a STA from each site STA, the communication quality of a described STA is lower than default quality threshold, and the traffic demand of a described STA is higher than the preset flow demand;
Described AP initiatively trains message to described STA transmission on each antenna direction of aerial array in the training period of a described STA, and obtain described training result of initiatively training the message correspondence;
Described AP selects optimal antenna according to described training result from described aerial array;
Described AP adopts described optimal antenna to send user's message to a described STA.
2. method according to claim 1 is characterized in that, described AP determines a STA from each STA, comprising:
Described AP determines present rate less than the 2nd STA of first threshold from each STA, the communication quality of described the 2nd STA is lower than default quality threshold;
Described AP determines that from described the 2nd STA the ratio of present flow rate and present rate is greater than a STA of second threshold value.
3. method according to claim 1 is characterized in that, described obtaining after the described training result of initiatively training the message correspondence also comprises:
Described AP upgrades present rate and the present flow rate corresponding with a described STA according to described training result.
4. according to each described method in the claim 1～3, it is characterized in that, described AP in the training period of a described STA send to a described STA on each antenna direction of aerial array initiatively train message before, also comprise:
Described AP determines whether a described STA is carried out the active training according to current interface-free resources occupied information;
If then described AP carries out to a described STA and sends the step of initiatively training message.
5. method according to claim 4 is characterized in that, described interface-free resources occupied information comprises at least a in the following information:
Resource free time degree, message number to be sent, available buffering area, the utilance of eating dishes without rice or wine, carry out the initiatively number of the STA of training.
6. an access point AP is characterized in that, comprising:
Determination module is used for determining a STA from each site STA that the communication quality of a described STA is lower than default quality threshold, and the traffic demand of a described STA is higher than the preset flow demand;
Sending module was used for initiatively training message to described STA transmission on each antenna direction of aerial array in the training period of a described STA;
Acquisition module is used for obtaining described training result of initiatively training the message correspondence;
Antenna Selection Module is used for according to described training result, selects optimal antenna from described aerial array;
Described sending module also is used for, and adopts described optimal antenna to send user's message to a described STA.
7. AP according to claim 6 is characterized in that, described determination module specifically is used for:
Determine present rate less than the 2nd STA of first threshold from each STA, the communication quality of described the 2nd STA is lower than default quality threshold;
Determine that from described the 2nd STA the ratio of present flow rate and present rate is greater than a STA of second threshold value.
8. AP according to claim 6 is characterized in that, also comprises:
Update module is used for according to described training result, upgrading present rate and the present flow rate corresponding with a described STA after described acquisition module obtains described training result of initiatively training the message correspondence.
9. according to each described AP in the claim 6～8, it is characterized in that, described determination module also is used for, described sending module in the training period of a described STA, send to a described STA on each antenna direction at aerial array initiatively train message before, determine whether that according to current interface-free resources occupied information a described STA is carried out active to be trained;
If then described sending module is initiatively trained message to described STA transmission to described on each antenna direction of aerial array.
10. AP according to claim 9 is characterized in that, described interface-free resources occupied information comprises at least a in the following information:
Resource free time degree, message number to be sent, available buffering area, the utilance of eating dishes without rice or wine, carry out the initiatively number of the STA of training.
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