CN1819483A - Down power controlling system and method based on mobile terminal power prediction - Google Patents
Down power controlling system and method based on mobile terminal power prediction Download PDFInfo
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Abstract
The system includes base station and mobile terminal. The mobile terminal includes a signal to interference ratio estimating module, a power control word arbiter, a power word encoder, a signal to interference ratio prediction module and a state register. The said state register is used to store the actual value of measuring the signal to interference ration of signal received by mobile station and to predict the signal to interference ration of preset period. The power control word arbiter is used to compare the predicted value of said signal to interference ratio with the target value of current signal to interference in order to get the power control word. The power control word encoder is used to encode the power control word.
Description
Technical field
The present invention relates to power control system and method in a kind of communication system, relate in particular to down power controlling system and the method based on portable terminal power predicted in a kind of communication system.
Background technology
In communication system, transmitting power is a kind of resource of preciousness, and the base station sends data by the transmitting power of setting to terminal.In communicating system descending link, each subscriber terminal equipment is different with the distance of base station, like this, in the base station when each terminal equipment transmitting power is identical, the signal that will cause the terminal equipment nearer apart from the base station to receive is strong, a little less than the signal that terminal equipment far away receives, thereby make that the terminal equipment that is positioned at base station far-end can't operate as normal; And; also run into the problem of " shadow effect " in the radio wave propagation through regular meeting; the position of portable terminal in the sub-district is often to change at random; so path loss can significantly change; therefore; the transmitting power of necessary real time altering base station can guarantee at this regional communication quality, and this process is exactly the descending power control of communication system transmitting power.
Shown in Figure of description 1, in the descending control method of base station transmitting power, can adopt the power control mode of closed loop, under this control model, power control is divided into inner-loop power control and external circule power control, and described external circule power control its objective is by the actual signal quality (being Block Error Rate) to monitoring to compare with professional required target signal qualities, obtain the target sir (abbreviation signal interference ratio) of a real-time update, be configured to the inner-loop power control process again and use; And described inner-loop power control, signal according to current reception estimates current signal interference ratio, and by the relatively estimated value of received signal signal interference ratio and the desired value of the signal interference ratio that external circule power control provides, draw the power control command word of adjusting about power, this power control command word is sent to the base station by upward signal, and the base station is regulated transmitting power according to this power control command word.
Portable terminal estimates signal interference ratio according to current received signal, and compare with the target signal interference ratio with this signal interference ratio that estimates and to draw power control command word, the transmitting power of next moment to portable terminal controlled according to this power control command word in the base station, but, owing to can not realize real-time processing in terminal estimated signal interference ratio and power control command word, its control command word will uplink be given the base station behind a fixed response time, in Figure of description 2, the base station is measured frame 1, at frame 2 constantly, the base station is given in the power control command word uplink; Also there is a fixed response time in processing controls command word in base station, in Fig. 2, the base station is controlled the transmitting power of portable terminal correspondence at frame 4 constantly, therefore, originally wish the transmitting power of 2 moment of control frame to portable terminal, but be deferred to frame 4 and constantly controlled, the method for transmitting power is accurately controlled in this hope, can not realize the accurate control to transmitting power.
Summary of the invention
The present invention is directed to the shortcoming of prior art, a kind of system and method that carries out the descending power control of power prediction based on portable terminal is provided, can adjust the transmitting power of base station timely, to adapt to the various variations of terminal.
Down power controlling system based on mobile terminal power prediction of the present invention, comprise base station and portable terminal, described portable terminal comprises signal interference ratio estimation module, power control word decision device, power control word encoder, also comprises signal interference ratio prediction module and status register;
Described status register is used to store the actual measured value of the signal interference ratio of portable terminal received signal;
Described signal interference ratio prediction module is used for the signal interference ratio actual measured value according to the signal interference ratio estimated value of signal interference ratio estimation module output and the storage of above-mentioned status register, the signal interference ratio of prediction setting cycle;
Described power control word decision device is used for more above-mentioned signal interference ratio predicted value and current signal interference ratio desired value, draws the power control word;
Described power control word encoder is used for above-mentioned power control word is encoded.
Method for controlling downlink power based on mobile terminal power prediction of the present invention, its step comprises:
Step 1, the signal interference ratio of portable terminal prediction setting cycle;
Step 2, portable terminal draws power control word information with above-mentioned signal interference ratio predicted value and current signal interference ratio desired value comparison;
Step 3, transmitting power is adjusted according to above-mentioned power control word information in the base station.
Among the present invention, portable terminal dopes the predicted value of signal interference ratio behind the setting cycle according to the estimated value of received signal signal interference ratio, this predicted value is compared with the desired value of current received signal signal interference ratio, draw power control word information, the base station is adjusted the transmitting power of setting cycle according to the power control word information of portable terminal, eliminate the time delay of base station power control with this, realize in time adjusting transmitting power, change to adapt to portable terminal.
Description of drawings
Fig. 1 is the schematic diagram of control base station transmitting power in the prior art;
Fig. 2 is the schematic diagram of control base station transmitting power in the prior art;
Fig. 3 is the down power controlling system structural representation based on mobile terminal power prediction of the present invention;
Fig. 4 is the method for controlling downlink power flow chart based on mobile terminal power prediction of the present invention;
Fig. 5 is the method for controlling downlink power schematic diagram based on mobile terminal power prediction of the present invention.
Embodiment
Among the present invention, portable terminal dopes the predicted value of signal interference ratio behind the setting cycle according to the estimated value of received signal signal interference ratio, this predicted value is compared with the desired value of current received signal signal interference ratio, draw power control word information, the base station is adjusted the transmitting power of setting cycle according to this power control word information, eliminates the time delay of power control with this.
The present invention will be further described below in conjunction with Figure of description.Shown in Figure of description 3, down power controlling system based on mobile terminal power prediction of the present invention, comprise base station and portable terminal, described portable terminal comprises signal interference ratio estimation module, power control word decision device, power control word encoder, also comprises signal interference ratio prediction module and status register;
Described signal interference ratio estimation module is used to estimate the signal interference ratio of current mobile terminal received signal; The ratio of the interference power when this signal interference ratio estimation module is got the signal code power of portable terminal received signal and portable terminal received signal multiply by this ratio coefficient one spreading factor again, and the signal interference ratio estimated value that this module draws can be expressed as with formula:
Signal interference ratio=(received signal code power/interference power) * spreading factor
For example, the signal code power of current mobile terminal received signal is 0.001, and the interference power during the portable terminal received signal is 0.0001, and the spreading factor of this moment is 16, and then current signal interference ratio estimated value is 160, and being converted to dB is exactly 22dB; In the present invention, described signal interference ratio desired value, signal interference ratio estimated value, signal interference ratio predicted value unit are dB;
Described status register is used to store the actual measured value of the signal interference ratio that comprise present frame constantly setting predetermined period quantity of present frame before the moment; The actual measured value of the signal interference ratio that stores in this status register is brought in constant renewal in, and for example, at frame 1 constantly, the actual measured value of the signal interference ratio that stores in this register is the signal interference ratio actual measured value and 0,0 of present frame; And at frame 2 constantly, the actual measured value of the signal interference ratio that stores in this register is the signal interference ratio actual measured value and the frame 1 signal interference ratio actual measured value and 0 constantly of present frame; At frame 3 constantly, the actual measured value of the signal interference ratio that stores in this register is the signal interference ratio actual measured value and the frame 1 signal interference ratio actual measured value and the frame 2 signal interference ratio actual measured value constantly constantly of present frame;
Described signal interference ratio prediction module is used for the signal interference ratio actual measured value according to the signal interference ratio estimated value of signal interference ratio estimation module output and the storage of above-mentioned status register, the signal interference ratio of prediction setting cycle; Above-mentioned setting cycle be portable terminal received signal frame time cycle arbitrary integer doubly; The signal interference ratio of the setting cycle of described prediction is got last prediction filter coefficient and the last product of predicting the actual measured value of extremely current constantly previous frame signal interference ratio constantly constantly, for example, the signal interference ratio predicted value of setting cycle can be used following formulate:
In the following formula, a
m T(K-1) the last prediction of expression filter coefficient a constantly
m(K-1) transposition, the actual measured value of the signal interference ratio that stores in the above-mentioned status register of u (K) expression; The filter coefficient here is the numerical value of a continual renovation, that is to say, the filter coefficient of current time is different with last prediction filter coefficient constantly, and the filter coefficient of current time can be expressed as:
In the following formula, a
m(K-1) be last prediction filter coefficient constantly, predetermined period number of m for setting, P (K-1) is a
m(K-1) Dui Ying weighting matrix, α are constant forgetting factor, the actual measured value of the signal interference ratio that stores in the above-mentioned status register of u (K) expression, u
T(K) be the transposition of u (K), G (K) is the signal interference ratio estimated value of current time,
Be last prediction signal interference ratio predicted value constantly;
Weighting matrix P (K-1) in the following formula is the numerical value of bringing in constant renewal in, and the weighting matrix P (K) of current time can be expressed as:
In the following formula, P (K-1) is a last prediction weighting matrix constantly, and α is constant forgetting factor, the actual measured value of the signal interference ratio that stores in the above-mentioned status register of u (K) expression, u
T(K) be the transposition of u (K);
By the formula of above-mentioned prediction signal interference ratio as can be seen, when the signal interference ratio prediction module is predicted the frame signal interference ratio constantly of next setting cycle constantly at present frame, the actual measured value of the signal interference ratio that stores in the definite current register of needs and the transposition of last prediction filter coefficient constantly, and when determining the transposition of last prediction filter coefficient constantly, need determine last prediction filter coefficient constantly, the signal interference ratio prediction module is when last one carries out the signal interference ratio prediction constantly, upgrade last one constantly current filter coefficient and corresponding weighting matrix, like this, when the signal interference ratio prediction module is constantly predicted the signal interference ratio of next setting cycle at present frame, just can use the weighting matrix of filter coefficient that a prediction upgraded constantly and correspondence;
By above-mentioned formula as can be seen, the signal interference ratio prediction module of portable terminal dopes the signal interference ratio predicted value of setting cycle according to last prediction parameters constantly, for the signal interference ratio prediction module that guarantees portable terminal can be predicted the signal interference ratio of setting cycle, before the signal interference ratio prediction module is predicted, need carry out initialization to parameters, specifically comprise initialization filter coefficient and corresponding weighting matrix; Can predict that with portable terminal the signal interference ratio of 3 frames after the moment is example, then initialized filter coefficient a
3(0) is [100], corresponding weighting matrix
So, when the signal interference ratio prediction module is predicted frame 4 signal interference ratio constantly constantly at frame 1, according to formula
In the formula, the K value is the current prediction moment 1, then
In the formula: u (1) is owing to currently have only frame 1 signal interference ratio actual measured value constantly, and therefore, u (1) value is [000], a
3 T(0) then can be by a
3(0) draws for [100]; When frame 1 was constantly predicted signal interference ratio, the signal interference ratio prediction module was also upgraded filter coefficient and corresponding weighting matrix simultaneously, as
Parameters in the formula is all known, can determine the weighting matrix of this moment; For the renewal of filter coefficient, as
Parameters in the formula is all known, can determine the filter coefficient of this moment; When frame 2 is predicted frame 5 signal interference ratio constantly constantly, need use frame 1 filter coefficient and the weighting matrix constantly of above-mentioned renewal, like this, just realized continuous prediction to signal interference ratio;
Described power control word decision device is used for more above-mentioned signal interference ratio predicted value and current signal interference ratio desired value, draws the power control word; If the signal interference ratio numerical value that comparison signal interference ratio prediction module dopes is lower than current signal interference ratio desired value, then producing content is the power control word of transmitting power promotion; If the signal interference ratio numerical value that comparison signal interference ratio prediction module dopes is higher than current signal interference ratio desired value, then producing content is the power control word that transmitting power reduces; If the signal interference ratio numerical value that comparison signal interference ratio prediction module dopes is identical with current signal interference ratio desired value, then do not produce any power control word that changes about power; For obtaining of current signal interference ratio desired value, shown in Figure of description 1, compare with professional required target signal qualities by actual signal quality by external circule power control the portable terminal of monitoring, obtain the target signal interference ratio of a real-time update, be input to inner-loop power control again and use for power control word decision device;
Described power control word encoder is used for above-mentioned power control word is encoded; After the power control word was encoded, portable terminal sent to the base station with code signal by upward signal, and the base station is then adjusted respective frame transmitting power constantly according to the above-mentioned power control word coded message that receives.
Said system can realize the signal interference ratio of setting cycle is predicted, if predict at the signal interference ratio that each frame is all continuous to behind the setting cycle, then must need to too many or too much for use to predict the outcome accurately entirely and not predict before new predicted value comes into force, its result will cause the error meeting of predicted value increasing.Therefore, in order to obtain satisfied signal interference ratio predicted value, in portable terminal, also be provided with a counter among the present invention, this counter is used for the moment of present frame is counted, that is to say, be which frame after moment of frame of last time prediction is counted constantly to present frame, only during the moment of the predetermined period that equals to set in the moment of present frame, just signal interference ratio is predicted, comprise and upgrade filter coefficient and corresponding weighting matrix, and when the moment of present frame is not equal to moment of predetermined period of setting, do not carry out the signal interference ratio prediction, and be to use last prediction signal interference ratio predicted value constantly; Still can predict that with portable terminal the signal interference ratio of 3 frames after the moment is example, portable terminal is predicted frame 7 signal interference ratio constantly constantly at frame 4, then constantly at frame 5, counter judges that this frame is the 1st frame behind the frame of predicting last time, is not equal to the 3rd frame of setting cycle regulation, therefore, constantly do not carry out the signal interference ratio prediction at frame 5, and frame 5 uses frame 4 signal interference ratio predicted value constantly constantly, that is to say, 5 moment of the frame transmitting power of base station is constantly identical with frame 4; Arrived frame 7 constantly, counter judges that this frame is the 3rd frame behind the frame of predicting last time, and is identical with predetermined period of setting, then constantly the signal interference ratio of next predetermined period predicted at frame 7, just predictive frame 10 signal interference ratio constantly.
Because portable terminal can be predicted the signal interference ratio behind the setting cycle, and according to the control word coded message of this predicted value to the base-station transmitting-power adjustment, the base station is adjusted the transmitting power of setting cycle according to the power control word, overcome the current time delay that in adjusting transmitting power, exists, adapted to the variation of portable terminal.
The present invention also provides a kind of control method of the descending power based on mobile terminal power prediction, and shown in Figure of description 4, its step comprises:
Step 101, the signal interference ratio of portable terminal prediction setting cycle; Above-mentioned setting cycle be portable terminal received signal frame time cycle arbitrary integer doubly; The signal interference ratio of the setting cycle of described prediction is got last prediction filter coefficient and the last product of predicting the actual measured value of extremely current constantly previous frame signal interference ratio constantly constantly, for example, the signal interference ratio predicted value of setting cycle can be used following formulate:
In the following formula, a
m T(K-1) the last prediction of expression filter coefficient a constantly
m(K-1) transposition, the actual measured value of the signal interference ratio that stores in u (K) the expression portable terminal; The filter coefficient here is the numerical value of a continual renovation, that is to say, the filter coefficient of current time is different with last prediction filter coefficient constantly, and the filter coefficient of current time can be expressed as:
In the following formula, a
m(K-1) be last prediction filter coefficient constantly, predetermined period number of m for setting, P (K-1) is a
m(K-1) Dui Ying weighting matrix, α are constant forgetting factor, the actual measured value of the signal interference ratio that stores in u (K) the expression portable terminal, u
T(K) be the transposition of u (K), G (K) is the signal interference ratio estimated value of current time,
Be last prediction signal interference ratio predicted value constantly; Weighting matrix P (K-1) in the following formula is the numerical value of bringing in constant renewal in, and the weighting matrix P (K) of current time can be expressed as:
In the following formula, P (K-1) is a last prediction weighting matrix constantly, and α is constant forgetting factor, and u (K) is the actual measured value of the signal interference ratio of storage in the portable terminal, u
T(K) be the transposition of u (K);
By the formula of above-mentioned prediction signal interference ratio as can be seen, when portable terminal is predicted the frame signal interference ratio constantly of next setting cycle constantly at present frame, need to determine the actual measured value of the signal interference ratio of storage in the current terminal and the transposition of last prediction filter coefficient constantly, and when determining the transposition of last prediction filter coefficient constantly, need determine last prediction filter coefficient constantly, portable terminal is when last one carries out the signal interference ratio prediction constantly, upgrade last one constantly current filter coefficient and corresponding weighting matrix, like this, when portable terminal is constantly predicted the signal interference ratio of next setting cycle at present frame, just can use the weighting matrix of filter coefficient that a prediction upgraded constantly and correspondence;
By above-mentioned formula as can be seen, portable terminal dopes the signal interference ratio predicted value of setting cycle according to last prediction parameters constantly, can predict the signal interference ratio of setting cycle for guaranteeing portable terminal, before predicting, need carry out initialization to parameters, specifically comprise initialization filter coefficient and corresponding weighting matrix; Can predict that with portable terminal the signal interference ratio of 3 frames after the moment is example, then initialized filter coefficient a
3(0) is [100], corresponding weighting matrix
So, when portable terminal is predicted frame 4 signal interference ratio constantly constantly at frame 1, according to formula
In the formula, the K value is the current prediction moment 1, then
In the formula: u (1) is owing to currently have only frame 1 signal interference ratio actual measured value constantly, and therefore, u (1) value is [000], a
3 T(0) then can be by a
3(0) draws for [100]; When frame 1 was constantly predicted signal interference ratio, portable terminal also upgraded filter coefficient and corresponding weighting matrix simultaneously, as
Parameters in the formula is all known, can determine the weighting matrix of this moment; For the renewal of filter coefficient, as
Parameters in the formula is all known, can determine the filter coefficient of this moment; When frame 2 is predicted frame 5 signal interference ratio constantly constantly, need use frame 1 filter coefficient and the weighting matrix constantly of above-mentioned renewal, like this, just realized continuous prediction to signal interference ratio;
Step 102, portable terminal draws the power control word with above-mentioned signal interference ratio predicted value and current signal interference ratio desired value comparison; Described signal interference ratio desired value can be compared with professional required target signal qualities by the actual signal quality to the portable terminal of monitoring by external circule power control, obtains the target signal interference ratio of a real-time update, is input to inner-loop power control again and uses; If the signal interference ratio numerical value that dopes is lower than current signal interference ratio desired value, then can draw content is the power control word of transmitting power promotion; If the signal interference ratio numerical value that dopes is higher than current signal interference ratio desired value, then can draw content is the power control word that transmitting power reduces; If the signal interference ratio numerical value that dopes is identical with current signal interference ratio desired value, then do not produce any power control word that changes about power;
Step 103, portable terminal is encoded above-mentioned power control word, and this power control word coded message is sent to the base station by upward signal;
Step 104, base station are adjusted the transmitting power of setting cycle according to the above-mentioned power control word coded message that receives; Receive the power control word code signal that requires to promote transmitting power as the base station, then the base station promotes transmitting power; As receive the power control word code signal that requires to reduce transmitting power, then the base station reduces transmitting power.
In the method for controlling downlink power based on mobile terminal power prediction of the present invention, can realize the signal interference ratio of setting cycle is predicted, thereby make portable terminal overcome the time delay that exists when the base station is handled the upward signal of regulating transmitting power and regulated transmitting power, can adjust transmitting power timely.
Shown in Figure of description 5, for using the schematic diagram of the method for controlling downlink power of power prediction being regulated base station transmitting power based on portable terminal of the present invention, as can be seen from Figure, portable terminal is according to the estimated value to frame 1 signal interference ratio, dope frame 4 signal interference ratio constantly, and the signal interference ratio of this prediction compared with current signal interference ratio desired value, obtain the power control word, again this power control word is encoded, constantly this code signal is sent to the base station in frame 2, handle the code signal that receives the base station, constantly transmitting power is adjusted in frame 4, for other frame, the frame 5 of frame 4 back for example, frame 6 etc., all can regulate corresponding transmitting power, promptly at the frame 2 of correspondence by this method, frame 3 carries out the signal interference ratio prediction constantly.
Using said method can realize the signal interference ratio of setting cycle is predicted, but, if predict at the signal interference ratio that each frame is all continuous to behind the setting cycle, then must need to too many or too much for use to predict the outcome accurately entirely and not predict before new predicted value comes into force, its result will cause the error meeting of predicted value increasing.Therefore, in order to obtain satisfied signal interference ratio predicted value, the moment to present frame among the present invention counts, that is to say, be which frame after moment of frame of last time prediction is counted constantly to present frame, only during the moment of the predetermined period that equals to set in the moment of present frame, just signal interference ratio is predicted, comprise and upgrade filter coefficient and corresponding weighting matrix, and when the moment of present frame is not equal to moment of predetermined period of setting, do not carry out the signal interference ratio prediction, and be to use last prediction signal interference ratio predicted value constantly; Still can predict that with portable terminal the signal interference ratio of 3 frames after the moment is example, portable terminal is predicted frame 7 signal interference ratio constantly constantly at frame 4, then constantly at frame 5, counter judges that this frame is the 1st frame behind the frame of predicting last time, is not equal to the 3rd frame of setting cycle regulation, therefore, constantly do not carry out the signal interference ratio prediction at frame 5, and frame 5 uses frame 4 signal interference ratio predicted value constantly constantly, that is to say, 5 moment of the frame transmitting power of base station is constantly identical with frame 4; Arrived frame 7 constantly, counter judges that this frame is the 3rd frame behind the frame of predicting last time, and is identical with predetermined period of setting, then constantly the signal interference ratio of next predetermined period predicted at frame 7, just predictive frame 10 signal interference ratio constantly.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification and the execution mode, it can be applied to various suitable the field of the invention fully, for those skilled in the art, can easily realize other modification, therefore under the universal that does not deviate from claim and equivalency range and limited, the legend that the present invention is not limited to specific details and illustrates here and describe.
Claims (13)
1. down power controlling system based on mobile terminal power prediction, comprise base station and portable terminal, described portable terminal comprises signal interference ratio estimation module, power control word decision device, power control word encoder, it is characterized in that described portable terminal also comprises signal interference ratio prediction module and status register;
Described status register is used to store the actual measured value of the signal interference ratio of portable terminal received signal;
Described signal interference ratio prediction module is used for the signal interference ratio actual measured value according to the signal interference ratio estimated value of signal interference ratio estimation module output and the storage of above-mentioned status register, the signal interference ratio of prediction setting cycle;
Described power control word decision device is used for more above-mentioned signal interference ratio predicted value and current signal interference ratio desired value, draws the power control word;
Described power control word encoder is used for above-mentioned power control word is encoded.
2. the down power controlling system based on mobile terminal power prediction as claimed in claim 1, it is characterized in that the actual measured value of the signal interference ratio that described status register stores is the actual measured value of the signal interference ratio that comprise present frame constantly setting predetermined period quantity of present frame before the moment.
3. the down power controlling system based on mobile terminal power prediction as claimed in claim 1 or 2 is characterized in that, the signal interference ratio predicted value of described setting cycle is
A in the formula
m T(K-1) the last prediction of expression filter coefficient a constantly
m(K-1) transposition, the actual measured value of the signal interference ratio that stores in u (K) the expression status register.
4. the down power controlling system based on mobile terminal power prediction as claimed in claim 3 is characterized in that, described current filter coefficient is
5. the down power controlling system based on mobile terminal power prediction as claimed in claim 4 is characterized in that the weighting matrix of described current time is
P in the formula (K-1) is a last prediction weighting matrix constantly, and α is constant forgetting factor, the actual measured value of the signal interference ratio that stores in u (K) the expression status register, u
T(K) be the transposition of u (K).
6. the down power controlling system based on mobile terminal power prediction as claimed in claim 1 is characterized in that, described portable terminal comprises a counter, and it is which frame of predictive frame last time after the moment counted constantly that this counter is used for present frame.
7. method for controlling downlink power based on mobile terminal power prediction is characterized in that step comprises:
Step 1, the signal interference ratio of portable terminal prediction setting cycle;
Step 2, portable terminal draws power control word information with above-mentioned signal interference ratio predicted value and current signal interference ratio desired value comparison;
Step 3, transmitting power is adjusted according to above-mentioned power control word information in the base station.
8. the method for controlling downlink power based on mobile terminal power prediction as claimed in claim 7, it is characterized in that described step 1 further comprises: portable terminal stores the actual measured value of the signal interference ratio that comprise present frame constantly setting predetermined period quantity of present frame before the moment.
9. as claim 7 or 8 described method for controlling downlink power, it is characterized in that the signal interference ratio predicted value of described setting cycle is based on mobile terminal power prediction
A in the formula
m T(K-1) the last prediction of expression filter coefficient a constantly
m(K-1) transposition, u (K) are the actual measured value of the signal interference ratio of storage in the portable terminal.
10. the down power controlling system based on mobile terminal power prediction as claimed in claim 9 is characterized in that, described current filter coefficient is
11. the down power controlling system based on mobile terminal power prediction as claimed in claim 10 is characterized in that the weighting matrix of described current time is
P in the formula (K-1) is a last prediction weighting matrix constantly, and α is constant forgetting factor, and u (K) is the actual measured value of the signal interference ratio of storage in the portable terminal, u
T(K) be the transposition of u (K).
12. the method for controlling downlink power based on mobile terminal power prediction as claimed in claim 7 is characterized in that, described step 1 further comprises: before the portable terminal initial forecast signal interference ratio, and initialization filter coefficient and corresponding weighting matrix.
13. the method for controlling downlink power based on mobile terminal power prediction as claimed in claim 7, it is characterized in that, described step 1 further comprises: portable terminal is which frame of predictive frame last time after the moment counted to present frame constantly, if in the moment of predetermined period that the moment of present frame equals to set, then carry out the signal interference ratio prediction; Otherwise, not carrying out the signal interference ratio prediction, present frame uses last prediction signal interference ratio predicted value constantly constantly.
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| CN101534547B (en) * | 2009-04-15 | 2011-12-07 | 北京天碁科技有限公司 | Mobile terminal and downward power control method |
| CN101304270B (en) * | 2007-05-10 | 2012-05-09 | 展讯通信（上海）有限公司 | Method for implementing APC quick accurate calibration |
| CN101359935B (en) * | 2007-08-01 | 2012-09-05 | 展讯通信（上海）有限公司 | Method for power control path in TD-SCDMA customer terminal |
| CN101577567B (en) * | 2008-05-09 | 2013-08-07 | 中兴通讯股份有限公司 | Power control method for downward closed loop in TD-SCDMA system |
| CN105451318A (en) * | 2014-07-31 | 2016-03-30 | 展讯通信（上海）有限公司 | Transmitting power control system and method and mobile terminal |
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| CN1194491C (en) * | 2001-12-05 | 2005-03-23 | 华为技术有限公司 | Outer loop power control method in CDMA system |
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| CN101304270B (en) * | 2007-05-10 | 2012-05-09 | 展讯通信（上海）有限公司 | Method for implementing APC quick accurate calibration |
| CN101359935B (en) * | 2007-08-01 | 2012-09-05 | 展讯通信（上海）有限公司 | Method for power control path in TD-SCDMA customer terminal |
| CN101577567B (en) * | 2008-05-09 | 2013-08-07 | 中兴通讯股份有限公司 | Power control method for downward closed loop in TD-SCDMA system |
| CN101534547B (en) * | 2009-04-15 | 2011-12-07 | 北京天碁科技有限公司 | Mobile terminal and downward power control method |
| CN105451318A (en) * | 2014-07-31 | 2016-03-30 | 展讯通信（上海）有限公司 | Transmitting power control system and method and mobile terminal |
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| CN100423469C (en) | 2008-10-01 |
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