CN105338607A - Power control method and access point - Google Patents
Power control method and access point Download PDFInfo
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- CN105338607A CN105338607A CN201510659404.6A CN201510659404A CN105338607A CN 105338607 A CN105338607 A CN 105338607A CN 201510659404 A CN201510659404 A CN 201510659404A CN 105338607 A CN105338607 A CN 105338607A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
Abstract
The invention provides a power control method and an access point. The method comprises steps of receiving to-be-sent data; coding the data according to preset initial modulation coding mode and sending the coded data to a terminal corresponding to identification information by using the preset initial sending power; determining whether the data has been normally sent; if it has, determining whether transmission rate of the data is higher than the preset data transmission rate; if the transmission rate of the data is higher than the preset data transmission rate, coding the data by using a modulation coding mode whose coding level is lower than that of the current modulation coding mode and sending the coded data to the terminal by using the sending power smaller than the current sending power; and if the transmission rate of the data is lower than the preset data transmission rate, coding the data by using a modulation coding mode whose coding level is higher than that of the current modulation coding mode and sending the coded data to the terminal by using the sending power larger than the current sending power. According to the invention, waste on power of the access point is reduced and interference to surrounding access points is reduced.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of Poewr control method and access point.
Background technology
In recent years, along with the development of WLAN (wireless local area network) (WirelessLocalAreaNetworks is called for short WLAN), WLAN advantage that is quick with it, efficient, low cost is widely used by people.
It is large to there is density in the distribution due to China's wlan network, and the surrounding of each wlan network access point (AccessPoint is called for short AP) all can have a large amount of AP to exist, and defines huge interference between AP.But, at the beginning of wlan network design, do not consider the interaction problems between AP, namely do not consider the mutual interference between AP.Therefore, in order to ensure that data can Successful transmissions, prior art is when carrying out transfer of data, and AP has to send data with larger power, causes serious power dissipation, and also result in serious interference to surrounding access points.
Summary of the invention
The invention provides a kind of Poewr control method and access point, in order to solve existing access point when data send, due to the power dissipation that transmitted power causes more greatly, surrounding access points is caused to the problem of severe jamming.
Poewr control method provided by the invention comprises:
Receive data to be sent, described data to be sent comprise the identification information of corresponding terminal;
Initial modulation coded system according to presetting is encoded to described data, and the data after coding are sent to the terminal corresponding with described identification information with the initial transmission power preset;
Determine whether described data normally send, if normally, then determine whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of current employing and current employing is greater than default message transmission rate;
If be greater than, then adopt the modulation coding mode lower than the modulation coding mode code levels of described current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power less than the transmitted power of described current employing;
If be less than, then adopt the modulation coding mode higher than the modulation coding mode code levels of described current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of described current employing.
Access point provided by the invention comprises:
Receiver module, for receiving data to be sent, described data to be sent comprise the identification information of corresponding terminal;
Modulation module, for encoding to described data according to the initial modulation coded system preset;
Sending module, for sending to the terminal corresponding with described identification information by the data after coding with the initial transmission power preset;
Determination module, for determining whether described data normally send, if normally, then determines whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of described current employing and described current employing is greater than default message transmission rate;
Described modulation module, if be also greater than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the modulation coding mode lower than the modulation coding mode code levels of described current employing is adopted to encode to data;
Described sending module, also for the data after coding are sent to described terminal with the transmitted power less than the transmitted power of described current employing;
Described modulation module, if be also less than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the modulation coding mode higher than the modulation coding mode code levels of described current employing is adopted to encode to data;
Described sending module, also for the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of described current employing.
Poewr control method provided by the invention and access point, by the modulation coding mode of current employing and message transmission rate corresponding to transmitted power are compared with the message transmission rate preset, if the message transmission rate of described correspondence is greater than default message transmission rate, the modulation coding mode lower than the modulation coding mode code levels of current employing is then adopted to encode to data, and the data after coding are sent to corresponding terminal with the power less than the transmitted power of current employing, if the message transmission rate corresponding with the modulation coding mode of current employing and transmitted power is less than default message transmission rate, the modulation coding mode higher than the modulation coding mode code levels of current employing is then adopted to encode to data, and the data after coding are sent to corresponding terminal with the power larger than the transmitted power of current employing, thus achieve the adjustment of access point to modulation coding mode and transmitted power, make access point can carry out transfer of data with lower power, decrease power dissipation, reduce the interference to surrounding access points.
Accompanying drawing explanation
The schematic flow sheet of the Poewr control method that Fig. 1 provides for one embodiment of the invention;
The schematic flow sheet of the Poewr control method that Fig. 2 provides for another embodiment of the present invention;
The structural representation of the access point that Fig. 3 provides for further embodiment of this invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The schematic flow sheet of the Poewr control method that Fig. 1 provides for one embodiment of the invention, as shown in Figure 1, the Poewr control method that the present embodiment provides, comprising:
Step 101, receive data to be sent, described data to be sent comprise the identification information of corresponding terminal;
The initial modulation coded system that step 102, basis are preset is encoded to described data, and the data after coding are sent to the terminal corresponding with described identification information with the initial transmission power preset;
Concrete, when access point sends data to the terminal that identification information is corresponding first, first access point encodes to data waiting for transmission with the initial modulation coded system preset, and the data after coding are sent to the initial transmission power preset the terminal that described identification information is corresponding.Wherein, described identification information is the unique identification of marking terminal identity.Described default initial modulation coded system and the initial transmission power preset can be those skilled in the art's rule of thumb sets itself, also can be access point according to default algorithm calculating acquisition, be not specifically limited in the present embodiment.
Step 103, determine whether described data normally send, if normally, then determine whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of current employing and current employing is greater than default message transmission rate, if be greater than, then perform step 104, if be less than, then perform step 105;
Concrete, terminal corresponding to described identification information is after receiving the data that access point sends, feedback information can be sent to access point, the feedback information that access point sends according to terminal, determine whether data are normally sent to described terminal, if determine, data are normally sent to described terminal, then according to the transmission rate of the modulation coding mode of current employing and the transmitted power calculated data of current employing, and the transmission rate of the data calculated and the message transmission rate preset are compared, determine whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of current employing and current employing is greater than default message transmission rate, if be greater than, perform step 104, if be less than, perform step 105.
Step 104, adopt the modulation coding mode lower than the modulation coding mode code levels of described current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power less than the transmitted power of described current employing;
Concrete, if access point determines the transmitted power of the modulation coding mode of current employing and current employing, corresponding message transmission rate is greater than default message transmission rate, the code levels of code levels higher than actual needs of the modulation coding mode of current employing is then described, the size of the transmitted power of current employing is greater than the transmitted power size of actual needs.Therefore, in order to reduce the power dissipation of access point self, and access point self is to the interference of surrounding access points, when access point sends data to the terminal that described identification information is corresponding again, access point is according to each modulation coding mode prestored and each transmitted power size, adopt the modulation coding mode lower than the modulation coding mode code levels of current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power less than the transmitted power of current employing.
Return and perform step 103, circulation like this, until the modulation coding mode that adopts of access point and message transmission rate corresponding to transmitted power equal default message transmission rate, or in each modulation coding mode prestored and each transmitted power, the modulation coding mode of current employing and message transmission rate corresponding to transmitted power are greater than default message transmission rate, and the modulation coding mode lower than the modulating-coding level of the modulation coding mode of current employing, and message transmission rate corresponding to the transmitted power less than the transmitted power of current employing is less than default message transmission rate, then stop circulation, access point transmits data with the modulation coding mode of described current employing and transmitted power.
Step 105, adopt the modulation coding mode higher than the modulation coding mode code levels of described current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of described current employing.
Concrete, if access point determines that the transmission rate of the data that the transmitted power of the modulation coding mode of current employing and current employing is corresponding is less than default message transmission rate, the code levels of code levels lower than actual needs of the modulation coding mode of current employing is then described, the size of the transmitted power of current employing is less than the transmitted power size of actual needs.Therefore, at least terminal can be transferred to the message transmission rate preset in order to ensure data, when access point sends data to the terminal that described identification information is corresponding again, access point is according to each modulation coding mode prestored and each transmitted power size, adopt the modulation coding mode higher than the modulation coding mode code levels of current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of current employing.
Return and perform step 103, circulation like this, until the modulation coding mode that adopts of access point and message transmission rate corresponding to transmitted power equal default message transmission rate, or in each modulation coding mode prestored and each transmitted power, the modulation coding mode of current employing and message transmission rate corresponding to transmitted power are greater than default message transmission rate, and closest to the message transmission rate preset, then circulate stopping, and access point transmits data with the modulation coding mode of current employing and transmitted power.
The Poewr control method that the present embodiment provides and access point, by the modulation coding mode of current employing and message transmission rate corresponding to transmitted power are compared with the message transmission rate preset, if the message transmission rate of described correspondence is greater than default message transmission rate, the modulation coding mode lower than the modulation coding mode code levels of current employing is then adopted to encode to data, and the data after coding are sent to corresponding terminal with the power less than the transmitted power of current employing, if the message transmission rate corresponding with the modulation coding mode of current employing and transmitted power is less than default message transmission rate, the modulation coding mode higher than the modulation coding mode code levels of current employing is then adopted to encode to data, and the data after coding are sent to corresponding terminal with the power larger than the transmitted power of current employing, thus achieve the adjustment of access point to modulation coding mode and transmitted power, make access point can carry out transfer of data with lower power, decrease power dissipation, reduce the interference to surrounding access points.
The schematic flow sheet of the Poewr control method that Fig. 2 provides for another embodiment of the present invention, as shown in Figure 2, Poewr control method provided by the invention, comprising:
Step 201, receive data to be sent, described data to be sent comprise the identification information of corresponding terminal;
The initial modulation coded system that step 202, basis are preset is encoded to described data, and the data after coding are sent to the terminal corresponding with described identification information with the initial transmission power preset;
Concrete, because each access point has the transmit power range oneself be suitable for, and at least one modulation coding mode, therefore, according to the scope of the transmitted power that access point allows, and the code levels of the built-in each modulation coding mode of access point, by transmitted power from small to large, code levels order from low to high, the transmitted power of access point and modulation coding mode are divided into some grades, and by the corresponding relation of each transmission power level and transmitted power size, and the corresponding relation of each modulating-coding grade and modulation coding mode prestores in the access point, wherein transmission power level is corresponding in turn in ascending transmitted power from low to high, modulating-coding grade is corresponding in turn to from low to high in code levels modulation coding mode from low to high.
Further, in the present embodiment, the initial modulation coded system preset and described default initial transmission power preferably can obtain in the following manner:
Access point is first according to each transmission power level prestored and each modulating-coding grade, determine initial transmission power level and initial modulating-coding grade, concrete, can following formula be passed through, initial transmission power level and initial modulating-coding grade are determined:
k＝||N*M/2||
Wherein N is transmission power level, N=1, and 2,3,4........, M are modulating-coding grade, M=1, and 2,3,4........, k are the positive integer after N*M/2 rounds downwards.
According to above-mentioned formula, when the product of transmission power level N and modulating-coding grade M meets the result of product k of above formula, now the value of transmission power level N and modulating-coding grade M is initial transmission power level and initial modulating-coding grade.
Access point is according to the corresponding relation of the transmission power level prestored and transmitted power size, determine the transmitted power size that initial transmission power grade is corresponding, according to the corresponding relation of the modulating-coding grade prestored and modulation coding mode, determine the modulation coding mode that initial modulation encoding levels is corresponding.And the modulation coding mode corresponding according to initial modulation encoding levels is encoded to data, the data after coding are sent to corresponding terminal by the transmitted power size corresponding according to initial transmission power grade.
Step 203, determine whether described data normally send, if normal, then determine whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of current employing and current employing is greater than default message transmission rate, if be greater than, perform step 204, if be less than, perform step 205;
Concrete, after access point receives the information of terminal feedback, whether normally terminal is sent to according to feedack determination data, if be normally sent to terminal, then according to the transmission rate of the modulation coding mode of current employing and the transmitted power calculated data of current employing, and the transmission rate of the data calculated and the message transmission rate preset are compared, determine whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of current employing and current employing is greater than default message transmission rate, if be greater than, perform step 204, if be less than, perform step 205.
Step 204, adopt the modulation coding mode lower than the modulation coding mode code levels of described current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power less than the transmitted power of described current employing;
Concrete, because the modulation coding mode of current employing and message transmission rate corresponding to the transmitted power of current employing are greater than default message transmission rate, the code levels of code levels higher than actual needs of the modulation coding mode of current employing is then described, the size of the transmitted power of current employing is greater than the transmitted power size of actual needs.Then the value of k is reduced to k-1, according to the k value after adjustment, redefines power and send grade and modulating-coding grade; Send grade and modulating-coding grade according to the power redefined, determine corresponding transmitted power and modulation coding mode; According to the transmitted power redefined and modulation coding mode, data are encoded, and send to described terminal.
Here what deserves to be explained is: what relate in this step redefines the method that power sends grade and modulating-coding grade, and determine that the correlation method related in the method for corresponding transmitted power and modulation coding mode and above-mentioned steps 202 is similar, here repeat no more.
Return and perform step 203, circulation like this is until the modulation coding mode that adopts of access point and message transmission rate corresponding to transmitted power equal default message transmission rate, or in each modulation coding mode prestored and each transmitted power, the modulation coding mode of current employing and message transmission rate corresponding to transmitted power are greater than default message transmission rate, and the modulation coding mode lower than the modulating-coding level of the modulation coding mode of current employing and message transmission rate corresponding to the transmitted power less than the transmitted power of current employing, be less than default message transmission rate, then stop circulation, access point transmits data with the modulation coding mode of current employing and transmitted power.
Step 205, adopt the modulation coding mode higher than the modulation coding mode code levels of described current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of described current employing;
Concrete, the transmission rate of the modulation coding mode of current employing and data corresponding to the transmitted power of current employing is less than default message transmission rate, the code levels of code levels lower than actual needs of the modulation coding mode of current employing is then described, the size of the transmitted power of current employing is less than the transmitted power size of actual needs.Then the value of k is increased to k+1, according to the k value after adjustment, redefine power and send grade and modulating-coding grade; Send grade and modulating-coding grade according to the power redefined, determine corresponding transmitted power and modulation coding mode; According to the transmitted power redefined and modulation coding mode, data are encoded, and send to described terminal.
What relate in this step redefines the method that power sends grade and modulating-coding grade, and determines that the correlation method related in the method for corresponding transmitted power and modulation coding mode and above-mentioned steps 202 is similar, here repeats no more.
Return and perform step 203, circulation like this, until the modulation coding mode that adopts of access point and message transmission rate corresponding to transmitted power equal default message transmission rate, or in each modulation coding mode prestored and each transmitted power, current employing modulation coding mode and message transmission rate corresponding to transmitted power be greater than default message transmission rate, and closest to the message transmission rate preset, then circulate stopping, and access point transmits data with the modulation coding mode of current employing and transmitted power.
If step 206 modulation coding mode brings up to the highest modulation coding mode of default modulation level, transmitted power brings up to default maximum transmit power, the transmission rate of data is still less than default message transmission rate, then send cooperation request to neighbouring interference access point, to make described neighbouring interference access point ask according to described cooperation, reduce transmitting power.
Concrete, when access point modulation coding mode brings up to the highest modulation coding mode of default modulation level, transmitted power brings up to default maximum transmit power, when the transmission rate of data is still less than default message transmission rate, access point sends cooperation request in space towards periphery with the form of broadcast, makes to disturb access point around after receiving cooperation request, under the prerequisite not affecting own data transmission, reduce the transmitted power of self, to reduce interference.
The Poewr control method that the present embodiment provides and access point, by the modulation coding mode of current employing and message transmission rate corresponding to transmitted power are compared with the message transmission rate preset, if the message transmission rate of described correspondence is greater than default message transmission rate, the modulation coding mode lower than the modulation coding mode code levels of current employing is then adopted to encode to data, and the data after coding are sent to corresponding terminal with the power less than the transmitted power of current employing, if the message transmission rate corresponding with the modulation coding mode of current employing and transmitted power is less than default message transmission rate, the modulation coding mode higher than the modulation coding mode code levels of current employing is then adopted to encode to data, and the data after coding are sent to corresponding terminal with the power larger than the transmitted power of current employing, thus achieve the adjustment of access point to modulation coding mode and transmitted power, make access point can carry out transfer of data with lower power, decrease power dissipation, reduce the interference to surrounding access points.
The structural representation of the access point that Fig. 3 provides for further embodiment of this invention, as shown in Figure 3, the access point that the present embodiment provides, comprising:
Receiver module 10, for receiving data to be sent, described data to be sent comprise the identification information of corresponding terminal;
Modulation module 20, for encoding to described data according to the initial modulation coded system preset;
Sending module 30, for sending to the terminal corresponding with described identification information by the data after coding with the initial transmission power preset;
Determination module 40, for determining whether described data normally send, if normally, then determines whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of described current employing and described current employing is greater than default message transmission rate;
Described modulation module 20, if be also greater than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the modulation coding mode lower than the modulation coding mode code levels of described current employing is adopted to encode to data;
Described sending module 30, also for the data after coding are sent to described terminal with the transmitted power less than the transmitted power of described current employing;
Described modulation module 20, if be also less than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the modulation coding mode higher than the modulation coding mode code levels of described current employing is adopted to encode to data;
Described sending module 30, also for the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of described current employing.
Described sending module 30, if also bring up to the highest modulation coding mode of default modulation level for modulation coding mode, transmitted power brings up to default maximum transmit power, the transmission rate of data is still less than default message transmission rate, then send cooperation request to neighbouring interference access point, to make described neighbouring interference access point ask according to described cooperation, reduce transmitting power.
Described determination module 40, also for according to each transmission power level prestored and each modulating-coding grade, determines initial transmission power level and initial modulating-coding grade;
According to the corresponding relation of the transmission power level prestored and transmitted power size, determine the initial transmission power that initial transmission power grade corresponds to, wherein, transmission power level is corresponding in turn to ascending transmitted power from low to high;
According to the corresponding relation of the modulating-coding grade prestored and modulation coding mode, determine the initial modulation coded system that initial modulation encoding levels is corresponding, wherein, modulating-coding grade is corresponding in turn to from low to high in code levels modulation coding mode from low to high.
Described determination module 40, specifically for determining that result of product is that to send grade and modulating-coding grade be that initial power sends grade and modulating-coding grade for the power of k; Wherein, the computing formula of k is as follows:
k＝||N*M/2||
Wherein N is that power sends grade, and N=1,2,3,4........, M are modulating-coding grade, M=1, and 2,3,4........, k are the positive integer after N*M/2 rounds downwards.
Described determination module 40, if be specifically also greater than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the value of k is reduced to k-1, according to the k value after adjustment, redefine power and send grade and modulating-coding grade;
Send grade and modulating-coding grade according to the power redefined, determine corresponding transmitted power and modulation coding mode;
Described modulation module 20, specifically for the modulation coding mode corresponding according to the modulating-coding grade redefined, encodes to data;
Data after coding are sent to described terminal specifically for the transmitted power corresponding according to the transmission power level redefined by described sending module 30.
Described determination module 40, if be specifically also less than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the value of k is increased to k+1, according to the k value after adjustment, redefine power and send grade and modulating-coding grade;
Send grade and modulating-coding grade according to the power redefined, determine corresponding transmitted power and modulation coding mode;
Described modulation module 20, specifically for the modulation coding mode corresponding according to the modulating-coding grade redefined, encodes to data;
Data after coding are sent to described terminal specifically for the transmitted power corresponding according to the transmission power level redefined by described sending module 30.
The access point that the present embodiment provides can perform technical method as depicted in figs. 1 and 2, and its technical method shown in concrete executive mode and beneficial effect and Fig. 1 and Fig. 2 is similar, here repeats no more.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (12)
1. a Poewr control method, is characterized in that, comprising:
Receive data to be sent, described data to be sent comprise the identification information of corresponding terminal;
Initial modulation coded system according to presetting is encoded to described data, and the data after coding are sent to the terminal corresponding with described identification information with the initial transmission power preset;
Determine whether described data normally send, if normally, then determine whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of current employing and current employing is greater than default message transmission rate;
If be greater than, then adopt the modulation coding mode lower than the modulation coding mode code levels of described current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power less than the transmitted power of described current employing;
If be less than, then adopt the modulation coding mode higher than the modulation coding mode code levels of described current employing to encode to data, and the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of described current employing.
2. method according to claim 1, it is characterized in that, if modulation coding mode brings up to the highest modulation coding mode of default modulation level, transmitted power brings up to default maximum transmit power, the transmission rate of data is still less than default message transmission rate, then send cooperation request to neighbouring interference access point, to make described neighbouring interference access point ask according to described cooperation, reduce transmitting power.
3. method according to claim 1, is characterized in that, described default initial modulation coded system and described default initial transmission power are according to such as under type acquisition:
According to each transmission power level prestored and each modulating-coding grade, determine initial transmission power level and initial modulating-coding grade;
According to the corresponding relation of the transmission power level prestored and transmitted power size, determine the initial transmission power that initial transmission power grade is corresponding, wherein, transmission power level is corresponding in turn in ascending transmitted power from low to high;
According to the corresponding relation of the modulating-coding grade prestored and modulation coding mode, determine the initial modulation coded system that initial modulation encoding levels is corresponding, wherein, modulating-coding grade is corresponding in turn to from low to high in code levels modulation coding mode from low to high.
4. method according to claim 3, is characterized in that, each transmission power level that described basis prestores and each modulating-coding grade, determines initial transmission power level and initial modulating-coding grade, comprising:
Determine that result of product be the transmission power level of k and modulating-coding grade is that initial power sends grade and modulating-coding grade; Wherein, the computing formula of k is as follows:
k＝||N*M/2||
Wherein N is transmission power level, N=1, and 2,3,4........, M are modulating-coding grade, M=1, and 2,3,4........, k are the positive integer after N*M/2 rounds downwards.
5. method according to claim 4, it is characterized in that, be greater than if described, the modulation coding mode lower than the modulation coding mode code levels of described current employing is then adopted to encode to data, and the data after coding are sent to described terminal with the transmitted power less than the transmitted power of described current employing, comprising:
The value of k is reduced to k-1, according to the k value after adjustment, redefines power and send grade and modulating-coding grade;
Send grade and modulating-coding grade according to the power redefined, determine corresponding transmitted power and modulation coding mode;
According to the transmitted power redefined and modulation coding mode, data are encoded, and send to described terminal.
6. method according to claim 4, it is characterized in that, be less than if described, the modulation coding mode higher than the modulation coding mode code levels of described current employing is then adopted to encode to data, and the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of described current employing, comprising:
The value of k is increased to k+1, according to the k value after adjustment, redefines power and send grade and modulating-coding grade;
Send grade and modulating-coding grade according to the power redefined, determine corresponding transmitted power and modulation coding mode;
According to the transmitted power redefined and modulation coding mode, data are encoded, and send to described terminal.
7. an access point, is characterized in that, comprising:
Receiver module, for receiving data to be sent, described data to be sent comprise the identification information of corresponding terminal;
Modulation module, for encoding to described data according to the initial modulation coded system preset;
Sending module, for sending to the terminal corresponding with described identification information by the data after coding with the initial transmission power preset;
Determination module, for determining whether described data normally send, if normally, then determines whether the message transmission rate corresponding with the transmitted power of the modulation coding mode of described current employing and described current employing is greater than default message transmission rate;
Described modulation module, if be also greater than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the modulation coding mode lower than the modulation coding mode code levels of described current employing is adopted to encode to data;
Described sending module, also for the data after coding are sent to described terminal with the transmitted power less than the transmitted power of described current employing;
Described modulation module, if be also less than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the modulation coding mode higher than the modulation coding mode code levels of described current employing is adopted to encode to data;
Described sending module, also for the data after coding are sent to described terminal with the transmitted power larger than the transmitted power of described current employing.
8. access point according to claim 7, it is characterized in that, described sending module, if also bring up to the highest modulation coding mode of default modulation level for modulation coding mode, transmitted power brings up to default maximum transmit power, and the transmission rate of data is still less than default message transmission rate, then send cooperation request to neighbouring interference access point, to make described neighbouring interference access point ask according to described cooperation, reduce transmitting power.
9. access point according to claim 7, is characterized in that, described determination module, also for
According to each transmission power level prestored and each modulating-coding grade, determine initial transmission power level and initial modulating-coding grade;
According to the corresponding relation of the transmission power level prestored and transmitted power size, determine the initial transmission power that initial transmission power grade corresponds to, wherein, transmission power level is corresponding in turn to ascending transmitted power from low to high;
According to the corresponding relation of the modulating-coding grade prestored and modulation coding mode, determine the initial modulation coded system that initial modulation encoding levels is corresponding, wherein, modulating-coding grade is corresponding in turn to from low to high in code levels modulation coding mode from low to high.
10. access point according to claim 9, is characterized in that, described determination module, specifically for determining that result of product is that to send grade and modulating-coding grade be that initial power sends grade and modulating-coding grade for the power of k; Wherein, the computing formula of k is as follows:
k＝||N*M/2||
Wherein N is that power sends grade, and N=1,2,3,4........, M are modulating-coding grade, M=1, and 2,3,4........, k are the positive integer after N*M/2 rounds downwards.
11. access points according to claim 10, it is characterized in that, described determination module, if be specifically also greater than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the value of k is reduced to k-1, according to the k value after adjustment, redefine power and send grade and modulating-coding grade;
Send grade and modulating-coding grade according to the power redefined, determine corresponding transmitted power and modulation coding mode;
Described modulation module, specifically for the modulation coding mode corresponding according to the modulating-coding grade redefined, encodes to data;
Data after coding are sent to described terminal specifically for the transmitted power corresponding according to the transmission power level redefined by described sending module.
12. access points according to claim 10, it is characterized in that, described determination module, if be specifically also less than default message transmission rate for the message transmission rate corresponding with the modulation coding mode of described current employing and the transmitted power of described current employing, then the value of k is increased to k+1, according to the k value after adjustment, redefine power and send grade and modulating-coding grade;
Send grade and modulating-coding grade according to the power redefined, determine corresponding transmitted power and modulation coding mode;
Described modulation module, specifically for the modulation coding mode corresponding according to the modulating-coding grade redefined, encodes to data;
Data after coding are sent to described terminal specifically for the transmitted power corresponding according to the transmission power level redefined by described sending module.
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