CN101170326B - An outside ring power control method and system - Google Patents

An outside ring power control method and system Download PDF

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CN101170326B
CN101170326B CN2006101140508A CN200610114050A CN101170326B CN 101170326 B CN101170326 B CN 101170326B CN 2006101140508 A CN2006101140508 A CN 2006101140508A CN 200610114050 A CN200610114050 A CN 200610114050A CN 101170326 B CN101170326 B CN 101170326B
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cctrch
sir
targ
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last
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CN101170326A (en
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胡文成
胡业勇
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Leadcore Technology Co Ltd
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Datang Mobile Communications Equipment Co Ltd
Leadcore Technology Co Ltd
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Abstract

The invention provides a method and a system for controlling outer-loop power. The method includes the steps of adjusting the target value of SIR DCH-target-current according to the tested value of BLER (Block Error Rate) of a transmission channel, and adjusts the target value of SIR TFCI-target-current according to the tested value of TER (True Error Rate) of a transmission format combination indicator; comparing the target values of SIR DCH-target-current and SIR TFCI-target-current with that of SIR CCTrCH-target-last; and adjusting the target value of SIR CCTrCH-target-current according to the comparing result. Taking the statistic results of BLER and TER into the comprehensive consideration, the invention establishes the corresponding relationship with the SIR target value so as to make the target value of SIR controlled by the inner-loop power change with the change of network and wireless environment, thus lowering disturbance and increasing the system performance.

Description

A kind of outer-loop power controlling method and system
Technical field
The present invention relates to the communications field, relate in particular to a kind of outer-loop power controlling method and system.
Background technology
Because code division multiple access (CDMA, Code Division Multiple Access) system is interference-limited self-interference system and has the near-far interference characteristic, so must adopt power control techniques in system.The specific implementation of power control has determined the quality of systematic function to a certain extent.
Closed power control comprises inner loop power control and exterior ring power control two parts.Wherein, inner loop power control is adjusted the transmitting power of base station or subscriber equipment (UE, User Equipment) by comparing signal interference ratio (SIR, Signal to Interference Ratio) measured value and sir target value.The final purpose of closed power control is the operation quality requirement that guarantees link, but characterize the bit error rate (BER of quality of service, Bit Error Rate) or bLock error rate (BLER, Block Error Rates) under different channel circumstances, be inequality with the corresponding relation of sir target value, so need exterior ring power control to adjust the sir target value in real time, to guarantee normal communication quality requirement according to current channel circumstance.The exterior ring power controlled function mainly is exactly the suitable corresponding relation of setting up between the sir target value of the transmission quality of Radio Link (BER/BLER) and closed power control, for inner loop power control provides dynamic sir target value.
Existing downlink outer loop power control algorithm mainly is: in certain cycle, according to measurement result and the comparative result between the BLER desired value of BLER closed power control sir target value is made corresponding adjustment.The major parameter that relates in the algorithm comprises the initial value of sir target value, the cycle that exterior ring power control is adjusted, the step-length of the rise/downward modulation that increases and reduce and the relevant parameter of BLER statistical method.Cycle that exterior ring power control is adjusted and the measurement statistical method of BLER are closely related, and the statistical method of BLER measurement simultaneously also will exert an influence to the performance of exterior ring power control.
At present, the measurement of BLER and statistics generally all are to remove cyclic redundancy check (CRC) (CRC in a sliding window, Cyclic Redundancy Check) transmission block of mistake (TB:Transmit Block) number is than TB numbers all in the last sliding window, sampling value is weighted average treatment so one by one then, obtain the last look of BLER, compare according to this up-to-date BLER value and BLER desired value at last, if the amplitude that exceeds (perhaps being lower than) is more than or equal to downward modulation (rise) thresholding, then the sir target value of this dedicated channel (DCH, Dedicated Channel) is reduced (rise) accordingly.
Yet, above-mentioned prior art is not very accurate according to the adjustment of the sir target value that measurement and the statistics of BLER are carried out, because do not consider transport format combination indicator (TFCI in the algorithm, TransportFormat Combination Indicator) situation of mistake, but under the wireless environment condition of severe, the TFCI mistake is still more common.This just makes that the relevant adjustment of exterior ring power control is accurate inadequately, thereby has influenced the performance of system to a certain extent.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of outer-loop power controlling method, the statistics of BLER and the statistics of TFCI mistake can be considered in the exterior ring power control algolithm in the lump, thereby make that power control is more accurate, systematic function is further promoted.
The technical scheme that realizes the object of the invention is as follows:
A kind of outer-loop power controlling method may further comprise the steps:
BLock error rate BLER measured value according to transmission channel is adjusted signal interference ratio SIR DCH-targ et-currentDesired value, and adjust SIR according to the measured value of transport format combination indicator error rate TER TFCI-targ et-currentDesired value;
With described SIR DCH-targ et-currentDesired value and SIR TFCI-targ et-currentThe target signal interference ratio SIR of the last outer shroud cycle CCTrCH Coded Composite Transport Channel CCTrCH of desired value and setting CCTrCH-targ et-lastCompare;
Adjust the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to comparative result CCTrCH-targ et-current
Preferably, adjust the output SIR of current outer shroud cycle transport format combination indicator TFCI according to the measured value of TER according to following steps TFCI-targ et-current:
B1, obtain measuring statistics TER value according to the exterior ring power control cycle;
If b2, judgement measure statistics TER value and raise thresholding UpTh (TER) with difference TER ζ according to the TER desired value of traffic set greater than TER and be worth, then with the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value increase TER and raise step delta up (TER) value; If TER ζ is less than TER downward modulation threshold value DwTh (TER) value, then with the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value reduce TER downward modulation step delta down (TER) value; Otherwise the numerical value of the output of current outer shroud period T FCI will be the numerical value of last time.
Preferably, obtain to measure statistics TER value according to following steps:
B11, initialization TFCI statistical parameter;
B12, periodic measurement obtain the TFCI error result;
B13, judge that whether the number of TFCI is more than or equal to N F, if then continue step b14; Otherwise return step b12;
B14, according to preceding N FIndividual result calculates
Figure GDA0000053501660000031
Wherein: N FBe the length of statistic window, X is the piece number of TFCI mistake in the statistic window;
B15, utilize formula
Figure GDA0000053501660000032
Be weighted on average, wherein: p is a forgetting factor, span 0～1, and the value of the value of i and m is identical in the computational process;
B16, judge whether to arrive action cycle of exterior ring power control,, then continue step b17 if arrive; Otherwise, change step b18 over to;
Statistics TER value is measured in b17, output, promptly Finish then;
B18, statistic window is slided backward W_SIZE, return step b13 then.
Preferably, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso greater than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get BLER so and raise the SIR adjustment step delta up (CCTrCH) of bigger among step delta up (BLER) and the TER rise step delta up (TER) value as current C CTrCH, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR smaller or equal to last outer shroud cycle CCTrCH CCTrCH-targ et-last, get BLER so and raise the SIR adjustment step delta up (CCTrCH) of step delta up (BLER) as this CCTrCH, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get TER so and raise the SIR adjustment step delta up (CCTrCH) of step delta up (TER) as this CCTrCH, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso less than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta down (CCTrCH) of bigger among BLER downward modulation step delta down (BLER) and the TER downward modulation step delta down (TER) value so, output SIR as this CCTrCH CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta down (CCTrCH) of BLER downward modulation step delta down (BLER) value so, output SIR as this CCTrCH CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta down (CCTrCH) of TER downward modulation step delta down (TER) value so, output SIR as this CCTrCH CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get TER so and raise the SIR adjustment step delta up (CCTrCH) of step delta up (TER) value as this CCTrCH, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso equal the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, keep the target signal interference ratio SIR of last outer shroud cycle CCTrCH so CCTrCH-targ et-lastConstant, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last
In addition, the present invention also provides a kind of exterior ring power control system, comprises that bLock error rate BLER/ transport format combination indicator error rate TER measures statistic device, comparison means and downlink closed-loop output control device, wherein:
Measure statistic device by BLER/TER and obtain the BLER of transmission channel and the measured value of TER; Adjust SIR by the downlink closed-loop output control device respectively according to the measured value of BLER and TER DCH-targ et-currentDesired value and SIR TFCI-targ et-currentDesired value; Comparison means is with described SIR DCH-targ et-currentDesired value and SIR TFCI-targ et-currentThe target signal interference ratio SIR of the last outer shroud cycle CCTrCH Coded Composite Transport Channel CCTrCH of desired value and setting CCTrCH-targ et-lastCompare; Adjust the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to comparative result by the downlink closed-loop output control device CCTrCH-targ et-current
Preferably, described downlink closed-loop output control device is adjusted the output SIR of current outer shroud cycle transport format combination indicator TFCI in such a way according to the measured value of TER TFCI-targ et-current:
B1, obtain measuring statistics TER value according to the exterior ring power control cycle;
If measuring statistics TER value, b2 is worth greater than raising thresholding UpTh (TER), then with the output SIR of current outer shroud period T FCI with difference TER ζ according to the TER desired value of traffic set TFCI-targ et-currentNumerical value increase TER and raise step delta up (TER) value; If TER ζ is less than downward modulation thresholding DwTh (TER) value, then with the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value reduce TER downward modulation step delta down (TER) value; Otherwise the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value will be the numerical value of last time.
Preferably, described downlink closed-loop output control device obtains to measure statistics TER value in such a way:
Initialization TFCI statistical parameter;
Periodic measurement obtains the TFCI error result;
In the number of TFCI more than or equal to N FSituation under, according to preceding N FIndividual result calculates
Figure GDA0000053501660000061
Wherein: N FBe the length of statistic window, X is the piece number of TFCI mistake in the statistic window;
And utilize formula
Figure GDA0000053501660000062
Be weighted on average, wherein: p is a forgetting factor, span 0～1, and the value of the value of i and m is identical in the computational process; Statistics TER value is measured in output when arriving action cycle of exterior ring power control, promptly
Figure GDA0000053501660000063
Preferably, described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso greater than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get BLER so and raise the SIR adjustment step delta up (CCTrCH) of bigger among step delta up (BLER) and the TER rise step delta up (TER) value as current C CTrCH, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR smaller or equal to last outer shroud cycle CCTrCH CCTrCH-targ et-last, get BLER so and raise the SIR adjustment step delta up (CCTrCH) of step delta up (BLER) as this CCTrCH, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get TER so and raise the SIR adjustment step delta up (CCTrCH) of step delta up (TER) as this CCTrCH, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso less than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta down (CCTrCH) of bigger among BLER downward modulation step delta down (BLER) and the TER downward modulation step delta down (TER) value so, output SIR as this CCTrCH CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta down (CCTrCH) of BLER downward modulation step delta down (BLER) value so, output SIR as this CCTrCH CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta down (CCTrCH) of TER downward modulation step delta down (TER) value so, output SIR as this CCTrCH CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get TER so and raise the SIR adjustment step delta up (CCTrCH) of step delta up (TER) value as this CCTrCH, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso equal the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, keep the target signal interference ratio SIR of last outer shroud cycle CCTrCH so CCTrCH-targ et-lastConstant, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last
Compared with prior art, the present invention has following beneficial effect:
The present invention is by taking all factors into consideration the measurement statistics of BLER and TER, set up and the sir target value between corresponding relation, the sir target value that inner loop power is controlled is more accurate to be changed along with the variation of network and wireless environment, disturb thereby reduce, make the performance of system get a greater increase.
Below in conjunction with the drawings and specific embodiments the present invention is further described.
Description of drawings
Fig. 1 is an outer-loop power controlling method flow chart of the present invention;
Fig. 2 is an exterior ring power control system control procedure schematic diagram of the present invention;
Fig. 3 is a TER statistic algorithm flow chart of the present invention;
Fig. 4 is that the sir target value of transmission channel DCH of the present invention is adjusted flow chart;
Fig. 5 is that the present invention adjusts flow chart according to the sir target value that TER draws CCTrCH;
Fig. 6 A, 6B are the target signal interference ratio SIR of current C CTrCH of the present invention CCTrCH-targ et-currentThe output flow chart.
Embodiment
Method of downlink outer loop power control provided by the invention is described below:
UE adjusts the sir target value of down link fast closed-loop power control according to the measured value of received signal BLER and TFCI error rate (being designated hereinafter simply as TER, the i.e. TFCI Error Rate) comparative result with the desired value of BLER desired value of setting and TER.
As shown in Figure 1, when the outer shroud period T arrives, may further comprise the steps for the target signal interference ratio adjustment process of final CCTrCH Coded Composite Transport Channel (CCTrCH, Coded Composite Transport Channel):
Step 101, according to the BLER of each transmission channel statistics, obtain the SIR of each transmission channel DCH of CCTrCH DCH-targ et[i]Get the maximum SIR of each transmission channel DCH-targ et[i]Value is as the output SIR of current outer shroud periodic transfer channel DCH-targ et-current
Step 102, according to the TER of TFCI decoding module statistics, obtain SIR TFCI-targ et-current
Step 103, according to SIR DCH-targ et-currentAnd SIR TFCI-targ et-currentTarget signal interference ratio SIR with last outer shroud cycle CCTrCH CCTrCH-targ et-lastComparative result, at the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-lastThe basis on adjust the target signal interference ratio SIR of a step-length as current C CTrCH CCTrCH-targ et-current
As shown in Figure 2, exterior ring power control system control procedure schematic diagram of the present invention.
This system comprises that BLER/TER measures statistic device 21, comparison means 22 and downlink closed-loop output control device 23, wherein:
Measure statistic device 21 obtains BLER and TER according to CRC check that produces and TFCI decoding measurement statistical value by BLER/TER; Comparison means 22 compares judgement with the desired value of BLER and TER respectively with it, adjusts SIR by downlink closed-loop output control device 23 respectively according to comparative result DCH-targ et-currentDesired value and SIR TFCI-targ et-currentDesired value; In addition, comparison means 22 is with described SIR DCH-targ et-currentDesired value and SIR TFCI-targ et-currentThe SIR of desired value and setting CCTrCH-targ et-lastDesired value compares; Adjust the SIR of downlink closed-loop power control again according to comparative result by downlink closed-loop output control device 23 CCTrCH-targ et-currentDesired value.
Said process is described in detail as follows:
One, the statistics of TER
The statistics of TER will adopt the method for window statistics to carry out.Clearer for what illustrate, the method principle that sliding window the is measured TER introduction of being correlated with below.
At first, utilize a length to be N FWindow, the piece number of TFCI mistake is X in the as if statistics window, calculates TER by the method for arithmetic average i
Computational methods are described with (01) formula:
TER i = X N F - - - ( 01 )
In this TER statistical method, finish N at every turn FAfter the piece statistics, window, is added up next group data then again and is obtained TER to front slide with sliding step W_STEP I+1
In the action cycle T of exterior ring power control, will obtain a plurality of TER iThe result, then this N TER result is carried out recursion according to (02) formula and calculates, thereby obtain final TER result.
TER ‾ m = p × TER ‾ m - 1 + ( 1 - p ) × TER i - - - ( 02 )
Wherein:
Be the result after the weighted average;
Figure GDA0000053501660000094
Last average weighted result;
TER iBe recent statistics result according to formula (01);
P is a forgetting factor, and span 0～1, the size of forgetting factor are represented the weight of historical statistics result to current statistics.This parameter can change according to different environment self-adaption, but its Changing Pattern more complicated, suggestion is in the phase I, and being set according to network and traffic performance is a fixed numeric values.
Judge whether to arrive the action cycle of exterior ring power control this moment,, then export the TER statistics if arrive Otherwise, statistic window is slided backward W_SIZE.
The process of above-mentioned TER statistical method can be briefly described as follows referring to flow chart shown in Figure 3:
Step 301, initialization TFCI statistical parameter;
Step 302, periodicity obtain the TFCI error result;
Step 303, judge that whether the number of TFCI is more than or equal to N F, if then continue step 304; Otherwise return step 302;
Step 304, according to preceding N FIndividual result calculates
Step 305, utilize formula
Figure GDA0000053501660000103
Calculate
Step 306, judge whether to arrive action cycle of exterior ring power control,, then continue step 307 if arrive; Otherwise, change step 308 over to;
Step 307, output TER statistics
Figure GDA0000053501660000105
Finish then;
Step 308, statistic window is slided backward W_SIZE, return step 303 then and continue to judge.
Two, the adjustment of SIR
As shown in Figure 4 and Figure 5, concrete grammar is described as follows:
Wherein, UpTh (BLER) and UpTh (TER) are that the sir target value of downlink outer loop power control raises threshold value, and DwTh (BLER) and DwTh (TER) are the sir target value downward modulation threshold values of downlink outer loop power control; BLER ζ and TER ζ measure statistics BLER value and TER value and according to the BLER desired value of traffic set and the difference of TER desired value; Δ down (BLER) and Δ down (TER) are the sir target value downward modulation step value of downlink outer loop power control; Δ up (BLER) and Δ up (TER) raise step value (unit: dB) for the sir target value of downlink outer loop power control.
The adjustment action of SIR is moved once every period T, and concrete adjustment process is described below:
At first, at all DCH under the CCTrCH, obtain the SIR of each DCH according to Fig. 4 DCH-targ et[i]Concrete steps are as follows:
Step 401, algorithm parameter initialization;
Step 402, obtain the CRC check result according to the exterior ring power control cycle;
Step 403, long and sliding step statistics obtains N BLER according to the BLER statistic window i, i=[1-N];
Step 404, described N BLERi adopted weighted-average method, obtain measuring statistics BLER value BLER m
Step 405, exterior ring power control cycle trigger T;
Step 406, BLER ζ equal to measure statistics BLER value and according to the difference of the BLER desired value of traffic set;
Step 407, judge that BLER ζ is whether greater than raising threshold value (UpTh (BLER)), if then continue step 408; Otherwise change step 409 over to;
Step 408, with SIR DCH-targ etDesired value increases Δ up (BLER);
Step 409, judge the BLER value with according to the difference BLER ζ of the BLER desired value of traffic set whether less than downward modulation threshold value (DwTh (BLER)), if then continue step 410; Otherwise change step 411 over to;
Step 410, with SIR DCH-targ etDesired value reduces Δ down (BLER);
Step 411, SIR DCH-targ etDesired value will keep last numerical value.
Utilize (03) formula to get the maximum SIR of each transmission channel again DCH-targ et[i]Value is as the output SIR of current outer shroud periodic transfer channel DCH-targ et-current, that is:
SIR DCH-targ?et-current＝MAX{SIR DCH-targ?et[i]，i＝1、2......N} (03)。
Then, obtain SIR according to Fig. 5 TFCI-targ et-current, concrete steps are as follows:
Step 501, algorithm parameter initialization;
Step 502, obtain the TER statistics according to the exterior ring power control cycle;
Step 503, long and sliding step statistics obtains N TER according to the TER statistic window i, i=[1-N];
Step 504, with a described N TER iAdopt weighted-average method, obtain measuring statistical value
Figure GDA0000053501660000111
Step 505, exterior ring power control cycle trigger T;
Step 506, TER ζ equal to measure statistics TER value and according to the difference of the TER desired value of traffic set;
Step 507, judge that TER ζ is whether greater than raising threshold value (UpTh (TER)), if then continue step 508; Otherwise change step 509 over to;
Step 508, with SIR TFCI-targ etDesired value increases Δ up (TER);
Step 509, judge the TER value with according to the difference BLER ζ of the TER desired value of traffic set whether less than downward modulation threshold value (DwTh (TER)), if then continue step 510; Otherwise change step 511 over to;
Step 510, with SIR TFCI-targ etDesired value reduces Δ down (TER);
Step 511, SIR TFCI-targ etDesired value will keep last numerical value.
At last, with the SIR of current output DCH-targ et-currentAnd SIR TFCI-targ et-currentTarget signal interference ratio SIR with last outer shroud cycle CCTrCH CCTrCH-targ et-lastCompare, according to comparative result, the target signal interference ratio SIR of output current C CTrCH CCTrCH-tart et-current
Shown in Fig. 6 A, 6B, be the target signal interference ratio SIR of current C CTrCH CCTrCH-targ et-currentThe output flow chart, detailed process is described below:
The SIR that step 601, judgement draw according to the BLER statistics DCH-targ et-currentWhether greater than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, if then continue step 602; Otherwise change step 606 over to;
The SIR that step 602, judgement draw according to the TER statistics TFCI-targ et-currentWhether greater than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, if then continue step 603; Otherwise change step 605 over to;
Step 603, get the SIR adjustment step delta up (CCTrCH) of bigger among Δ up (BLER) and the Δ up (TER) value as this CCTrCH;
Step 604, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
Step 605, the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR smaller or equal to last outer shroud cycle CCTrCH CCTrCH-targ et-last, then get the SIR adjustment step delta up (CCTrCH) of Δ up (BLER) as this CCTrCH; Change step 604 over to;
The SIR that step 606, judgement draw according to the BLER statistics DCH-targ et-currentWhether less than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-lastIf then continue step 607; Otherwise change step 613 over to;
The SIR that step 607, judgement draw according to the TER statistics TFCI-targ et-currentWhether greater than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, if then continue step 608; Otherwise change step 609 over to;
Step 608, get Δ up (TER) and adjust step delta up (CCTrCH), change step 604 then over to as the SIR of this CCTrCH;
Step 609, at the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-lastUnder the situation, judge the SIR that draws according to the TER statistics TFCI-targ et-currentWhether less than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, if then continue step 610; Otherwise change step 612 over to;
Step 610, get the SIR adjustment step delta down (CCTrCH) of bigger among Δ down (BLER) and the Δ down (TER) value as this CCTrCH;
Step 611, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
Step 612, the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, then get the SIR adjustment step delta down (CCTrCH) of Δ down (BLER) value as this CCTrCH, change step 611 then over to;
Step 613, the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, judge the SIR that draws according to the TER statistics TFCI-targ et-currentWhether less than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, if then continue step 614; Otherwise change step 615 over to;
Step 614, get Δ down (TER) value and adjust step delta down (CCTrCH), change step 611 then over to as the SIR of this CCTrCH;
Step 615, the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, judge the SIR that draws according to the TER statistics TFCI-targ et-currentWhether greater than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, if then continue step 616; Otherwise change step 618 over to;
Step 616, get Δ up (TER) value and adjust step delta up (CCTrCH) as the SIR of this CCTrCH;
Step 617, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
Step 618, the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso equal the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, then keep the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-lastConstant, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.

Claims (22)

1. an outer-loop power controlling method is used for closed power control, it is characterized in that, may further comprise the steps:
BLock error rate BLER measured value according to transmission channel is adjusted signal interference ratio SIR DCH-targ et-currentDesired value, and adjust SIR according to the measured value of transport format combination indicator error rate TER TFCI-targ et-currentDesired value;
With described SIR DCH-targ et-currentDesired value and SIR TFCI-targ et-currentThe target signal interference ratio SIR of the last outer shroud cycle CCTrCH Coded Composite Transport Channel CCTrCH of desired value and setting CCTrCH-targ et-lastCompare;
Adjust the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to comparative result CCTrCH-targ et-current
2. the method for claim 1 is characterized in that, adjusts the output SIR of current outer shroud cycle transport format combination indicator TFCI according to the measured value of TER according to following steps TFCI-targ et-current:
B1, obtain measuring statistics TER value according to the exterior ring power control cycle;
If b2, judgement measure statistics TER value and raise thresholding UpTh (TER) with difference TER ζ according to the TER desired value of traffic set greater than TER and be worth, then with the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value increase TER and raise step delta up (TER) value; If TER ζ is less than TER downward modulation thresholding DwTh (TER) value, then with the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value reduce TER downward modulation step delta down (TER) value; Otherwise the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value will be the numerical value of last time.
3. method as claimed in claim 2 is characterized in that, obtains to measure statistics TER value according to following steps:
B11, initialization TFCI statistical parameter;
B12, periodic measurement obtain the TFCI error result;
B13, judge that whether the number of TFCI is more than or equal to N F, if then continue step b14; Otherwise return step b12;
B14, according to preceding N FIndividual result calculates
Figure FDA0000053501650000011
Wherein: N FBe the length of statistic window, X is the piece number of TFCI mistake in the statistic window;
B15, utilize formula
Figure FDA0000053501650000021
Be weighted on average, wherein: p is a forgetting factor, span 0～1, and the value of the value of i and m is identical in the computational process;
B16, judge whether to arrive action cycle of exterior ring power control,, then continue step b17 if arrive; Otherwise, change step b18 over to;
Statistics TER value is measured in b17, output, promptly
Figure FDA0000053501650000022
Finish then;
B18, statistic window is slided backward W_SIZE, return step b13 then.
4. as claim 1,2 or 3 described methods, it is characterized in that, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso greater than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get BLER so and raise the SIR adjustment step delta of bigger among step delta up (BLER) and the TER rise step delta up (TER) value as current C CTrCH Up (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
5. as claim 1,2 or 3 described methods, it is characterized in that, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR smaller or equal to last outer shroud cycle CCTrCH CCTrCH-targ et-last, get BLER so and raise the SIR adjustment step delta of step delta up (BLER) as this CCTrCH Up (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
6. as claim 1,2 or 3 described methods, it is characterized in that, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get TER so and raise the SIR adjustment step delta of step delta up (TER) as this CCTrCH Up (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
7. as claim 1,2 or 3 described methods, it is characterized in that, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso less than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta of bigger among BLER downward modulation step delta down (BLER) and the TER downward modulation step delta down (TER) value so as this CCTrCH Down (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-alst-Δ Down (CCTrCH)
8. as claim 1,2 or 3 described methods, it is characterized in that, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta of BLER downward modulation step delta down (BLER) value so as this CCTrCH Down (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
9. as claim 1,2 or 3 described methods, it is characterized in that, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta of TER downward modulation step delta down (TER) value so as this CCTrCH Down (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
10. as claim 1,2 or 3 described methods, it is characterized in that, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get TER so and raise the SIR adjustment step delta of step delta up (TER) value as this CCTrCH Up (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
11. as claim 1,2 or 3 described methods, it is characterized in that, compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to following steps CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso equal the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, keep the target signal interference ratio SIR of last outer shroud cycle CCTrCH so CCTRCH-targ et-lastConstant, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last
12. an exterior ring power control system is used for closed power control, it is characterized in that, comprises that bLock error rate BLER/ transport format combination indicator error rate TER measures statistic device, comparison means and downlink closed-loop output control device, wherein:
Measure statistic device by BLER/TER and obtain the BLER of transmission channel and the measured value of TER; Adjust SIR by the downlink closed-loop output control device respectively according to the measured value of BLER and TER DCH-targ et-currentDesired value and SIR TFCI-targ et-currentDesired value; Comparison means is with described SIR DCH-targ et-currentDesired value and SIR TFCI-targ et-currentThe target signal interference ratio SIR of the last outer shroud cycle CCTrCH Coded Composite Transport Channel CCTrCH of desired value and setting CCTrCH-targ et-lastCompare; Adjust the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control according to comparative result by the downlink closed-loop output control device CCTrCH-targ et-current
13. system as claimed in claim 12 is characterized in that, described downlink closed-loop output control device is adjusted the output SIR of current outer shroud cycle transport format combination indicator TFCI in such a way according to the measured value of TER TFCI-targ et-current:
B1, obtain measuring statistics TER value according to the exterior ring power control cycle;
If b2 measures statistics TER value and raises thresholding UpTh (TER) with difference TER ζ according to the TER desired value of traffic set greater than TER and be worth, then with the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value increase TER and raise step delta up (TER) value; If TER ζ is less than TER downward modulation thresholding DwTh (TER) value, then with the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value reduce TER downward modulation step delta down (TER) value; Otherwise the output SIR of current outer shroud period T FCI TFCI-targ et-currentNumerical value will be the numerical value of last time.
14. system as claimed in claim 13 is characterized in that, described downlink closed-loop output control device obtains to measure statistics TER value in such a way:
Initialization TFCI statistical parameter;
Periodic measurement obtains the TFCI error result;
In the number of TFCI more than or equal to N FSituation under, according to preceding N FIndividual result calculates
Figure FDA0000053501650000051
Wherein: N FBe the length of statistic window, X is the piece number of TFCI mistake in the statistic window;
And utilize formula
Figure FDA0000053501650000052
Be weighted on average, wherein: p is a forgetting factor, span 0～1, and the value of the value of i and m is identical in the computational process; Statistics TER value is measured in output when arriving action cycle of exterior ring power control, promptly
15., it is characterized in that described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way as claim 12,13 or 14 described systems CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso greater than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get BLER so and raise the SIR adjustment step delta of bigger among step delta up (BLER) and the TER rise step delta up (TER) value as current C CTrCH Up (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
16., it is characterized in that described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way as claim 12,13 or 14 described systems CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR smaller or equal to last outer shroud cycle CCTrCH CCTrCH-targ et-last, get BLER so and raise the SIR adjustment step delta of step delta up (BLER) as this CCTrCH Up (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
17., it is characterized in that described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way as claim 12,13 or 14 described systems CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get TER so and raise the SIR adjustment step delta of step delta up (TER) as this CCTrCH Up (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
18., it is characterized in that described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way as claim 12,13 or 14 described systems CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currenntTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso less than the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta of bigger among BLER downward modulation step delta down (BLER) and the TER downward modulation step delta down (TER) value so as this CCTrCH Down (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
19., it is characterized in that described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way as claim 12,13 or 14 described systems CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta of BLER downward modulation step delta down (BLER) value so as this CCTrCH Down (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
20., it is characterized in that described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way as claim 12,13 or 14 described systems CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR less than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get the SIR adjustment step delta of TER downward modulation step delta down (TER) value so as this CCTrCH Down (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last-Δ Down (CCTrCH)
21., it is characterized in that described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way as claim 12,13 or 14 described systems CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, but the SIR that draws according to the TER statistics TFCI-targ et-currentTarget signal interference ratio SIR greater than last outer shroud cycle CCTrCH CCTrCH-targ et-last, get TER so and raise the SIR adjustment step delta of step delta up (TER) value as this CCTrCH Up (CCTrCH), output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last+ Δ Up (CCTrCH)
22., it is characterized in that described comparison means and downlink closed-loop output control device compare and adjust accordingly the target signal interference ratio SIR of the current C CTrCH of downlink closed-loop power control in such a way as claim 12,13 or 14 described systems CCTrCH-targ et-current:
If the SIR that draws according to the BLER statistics DCH-targ et-currentEqual the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, and the SIR that draws according to the TER statistics TFCI-targ et-currentAlso equal the target signal interference ratio SIR of last outer shroud cycle CCTrCH CCTrCH-targ et-last, keep the target signal interference ratio SIR of last outer shroud cycle CCTrCH so CCTrCH-targ et-lastConstant, output SIR CCTrCH-targ et-currentBe SIR CCTrCH-targ et-last
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