CN100442680C - Dynamic regulating method for power control - Google Patents
Dynamic regulating method for power control Download PDFInfo
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- CN100442680C CN100442680C CNB200510007516XA CN200510007516A CN100442680C CN 100442680 C CN100442680 C CN 100442680C CN B200510007516X A CNB200510007516X A CN B200510007516XA CN 200510007516 A CN200510007516 A CN 200510007516A CN 100442680 C CN100442680 C CN 100442680C
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Abstract
The present invention discloses a dynamic regulating method for the power control of an outer ring in combined services, which processes a service required to be processed in the combined services and ensures that each service in the combined services can satisfy service performance requirements and can also save resources. In addition, the present invention improves step length regulating algorithm for a service to be regulated, and even though large fluctuation exists in a received TB block number during a regulating period, a BLER can still finally converge to a set target value so as to ensure the controlling effect. The present invention simultaneously discloses a dynamic regulating method for the power control of an outer ring in a single service, which takes account of the received TB block number during the step length regulating calculation, and even though the large fluctuation exists in the received TB block number during the regulating period, the BLER can still finally converge to the set target value so as to ensure the controlling effect.
Description
Technical field
The present invention relates to the exterior ring power control technology, refer to a kind of dynamic adjusting method of exterior ring power control especially.
Background technology
In code division multiple access (CDMA) system, at present, in estimating the physical channel data singal reporting code, one of them important evaluation index is exactly Block Error Rate (BLER), and BLER is meant the shared ratio of TB piece number wrong in the transmission block (TB) that receives.Especially, in composite service, because composite service is meant that a terminal equipment activates multiple business simultaneously, and the business of these activation is according to certain regular multiplexing being mapped in the same physical channel, so, particularly important to the evaluation of physical channel data communication.
Because the variation of wireless environment varies, can't predict again, in order to estimate and guarantee the BLER demand, need to introduce a mechanism and finish.Outer-loop power controlling method is in order to realize estimating and guaranteeing the BLER demand, by outer-loop power controlling method different inner loop power control signal interference ratio (SIR) desired values are set, thereby make the error rate that receives TB piece number reach the BLER desired value of expection, thereby guarantee to receive the accuracy of TB piece number.
So the target of exterior ring power control is to provide desired communication quality, and is both not so good, also not too poor, because good excessively telecommunication service quality can be wasted capacity, make finally that network is congested easily and cause blocking rate too high, reduce the performance of network; Cross poor telecommunication service quality and then can not satisfy the communication quality requirement.
Exterior ring power control divides upload control and descending control, and ascending exterior ring power is controlled at network side and finishes, and descending power is controlled at travelling carriage and finishes.The ascending exterior ring power control method that control is adopted with downlink outer loop power is identical.
Figure 1 shows that the dynamic adjustment flow chart of prior art at the exterior ring power control of single business, describe the dynamic adjusting method of the single professional exterior ring power control of prior art in detail below in conjunction with Fig. 1, here supposition is the ascending exterior ring power control finished at network side and is example with a certain business to be measured, preestablish the target block error rate BLER tar of target signal interference ratio value SIRtar, this business to be measured, the also correct TB integrating instrument of initialization, mistake TB integrating instrument are set, outer shroud control is set adjusts timer, art methods may further comprise the steps:
Step 100: start outer shroud control and adjust timer T1.
Such as: the TB piece that indication received when CRCI=1 was set is correct, and during CRCI=0, the TB piece that indication receives is wrong, when judging CRCI=0, wrong TB integrating instrument is added 1; When judging CRCI=1, correct TB integrating instrument is added 1.
The piece number of the correct TB that the count value of correct TB integrating instrument equals to receive, the piece number of the wrong TB that the count value of mistake TB integrating instrument equals to receive; Total TB piece number that correct TB integrating instrument accumulative total and wrong TB integrating instrument accumulative total sum equal to receive.The task of this step is exactly to add up TB number of blocks TBt and wrong TB number of blocks TBf correct in the TB piece that receives by above-mentioned verification, for follow-up calculating is prepared.
The method of the current block error rate BLER cumu of aforementioned calculation: at first calculate total TB number of blocks value, be correct TB number of blocks TBt and wrong TB number of blocks TBf sum, the merchant of the TB number of blocks TBf of mistake in computation and total TB number of blocks then, multiply by at last absolutely again and promptly get current block error rate BLER cumu, computing formula is as follows:
BLERcumu＝(TBf/(TBf+TBt))×100％
The method of the current step value Step of aforementioned calculation Δ is: the value of being divided by with target block error rate BLER tar after current block error rate BLER cumu and target block error rate BLER tar subtract each other, multiply each other and the multiply each other value of back gained of step parameter StepUn with step-length modifying factor Factor, formula is as follows again:
StepΔ＝((BLERcumu-BLERtar)/BLERtar)×Factor×StepUn
In the following formula, step-length modifying factor Factor sets in advance, and it is relevant with the control time delay, and it is long more generally to control time delay, and Factor is more little for the step-length modifying factor; The control time delay is short more, and step-length modifying factor Factor is big more; And step-length modifying factor Factor changes between 0 and 1.Step parameter StepUn sets in advance, and for StepUp, from single user's angle, its value is to be the bigger the better, if too little, can cause BLER distribution variation; If but too big, can cause again disturbing becoming big.Therefore, this value needs compromise.It seems that from the data of emulation and test being that 0.5～1.5dB is counter by the step value Step Δ of maximum pushes away step parameter StepUn, even BLERcumu=100%, the substitution following formula can obtain the value of StepUn.
If the Step Δ that calculates illustrates then that greater than zero current block error rate BLER cumu is inferior to target block error rate BLER tar, then promote target signal interference ratio value SIRtar, the amplitude of lifting is the Step Δ, is about to the value that target signal interference ratio value SIRtar increases Step Δ size; If the Step Δ that calculates illustrates then that less than zero current block error rate BLER cumu is better than target block error rate BLER tar, then reduce target signal interference ratio value SIRtar, the amplitude of reduction is the Step Δ, is about to the value that target signal interference ratio value SIRtar reduces Step Δ size.
What provide above is the dynamic adjusting method of the single professional ascending exterior ring power control of prior art, and for the dynamic adjustment of downlink outer loop power control, adopting as above at travelling carriage, method gets final product.
For composite service, prior art is used the dynamic adjusting method that above-mentioned single professional exterior ring power is controlled, respectively each business is independently calculated, and then result calculated taked to get get little control strategy greatly and choose control, to reach dynamic adjustment to the exterior ring power control of composite service.
Such as: by x, y and three professional composite service of forming of z, calculate the current step-length of each business respectively according to above-mentioned art methods: Step Δ x, Step Δ y and Step Δ z, get one of them step value of little policy selection greatly and as adjusted value target signal interference ratio value SIRtar adjusted according to getting again.Here, get and get little control strategy greatly and be:, then promote target signal interference ratio value SIRtar as long as a value is arranged in Step Δ x, Step Δ y and Step Δ z greater than zero; If a plurality of values are arranged, then select a maximum value to promote target signal interference ratio value SIRtar as current step value all greater than zero; Have only when three values all less than zero the time, select a value of absolute value minimum to reduce target signal interference ratio value SIRtar as current step value.Get little control strategy greatly as can be seen from this getting: if the current step-length of each business exists not simultaneously the composite service, get control that little control strategy comes exterior ring power is carried out greatly and can't satisfy each business and all converge on the desired destination value according to this getting, promptly can not satisfy each business and all reach performance requirement.
In addition, processing for single business, above-mentioned art methods does not have problems when constant for receiving TB piece number, but the defective of this method be when adjustment cycle bigger, when the TB piece number that receives exists than great fluctuation process, the i.e. easier situation that the discontinuous transmission of TB piece number occurs in adjustment cycle, at this moment adopt this method the most at last BLER converge to target value set, thereby make this method only can be operated under the less situation of adjustment cycle, yet can cause a part of band-limited waste so again.Equally, dynamic adjusting method for existing composite service exterior ring power control, because each business all is processing methods of having used the single business of prior art, so also can exist when adjustment cycle bigger, when the TB piece number that receives exists than great fluctuation process, when being the discontinuous transmission of TB piece number, this method BLER the most at last converges to the shortcoming of target value set.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of dynamic adjusting method of composite service exterior ring power control, and this method can guarantee each performance of services requirement in the composite service.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of dynamic adjusting method of composite service exterior ring power control is provided with and starts outer shroud control and adjusts timer and controlling object change timer, and this method comprises that adjusting outer shroud control adjusts timer and controlling object change timer two parts,
The processing that timer is adjusted in described adjustment outer shroud control may further comprise the steps:
Determine current control business, after judging that the professional current Block Error Rate of current control that has calculated is not equal to the target Block Error Rate that sets in advance, calculate the professional current step value of current control, and, restart outer shroud control then and adjust timer according to the target signal interference ratio value that described current step value adjustment has been provided with;
The processing of described adjustment controlling object change timer may further comprise the steps:
The current Block Error Rate of other business in definite also statistical combination business except that current control business, calculate the poor of the current Block Error Rate of the business added up and the pairing target Block Error Rate that has been provided with of this business, determine maximum difference, judge that whether this maximum difference is greater than the pairing professional Block Error Rate difference permissible error value that has calculated of this maximum difference, if greater than, then change being used to of setting in advance and discern the sign of the value of the professional traffic flag of current control, restart controlling object change timer then for this maximum pairing business of difference; Otherwise, directly restart controlling object change timer.
The computational methods of described current Block Error Rate may further comprise the steps:
Add up piece number and the wrong TB piece number of the correct transmission block TB that receives respectively, determine the total TB piece number that receives according to the TB piece number of correct TB piece number and mistake;
The TB piece number of application error multiplies each other afterwards again with absolutely divided by the total TB piece number that receives, and obtains current Block Error Rate.
The method of the TB piece number of the piece number of the correct transmission block TB that described statistics receives and mistake is:
Set in advance respectively and the initialization composite service in the correct TB integrating instrument, the wrong TB integrating instrument of each business of each business, the demonstration CRC check result's of each business detection sign CRCI is set;
Respectively each professional TB piece in the composite service that receives is carried out CRC check,
Whether what judge the demonstration of CRCI sign is the correct sign of TB piece that indication receives, if then correct TB integrating instrument is added one; If not, then wrong TB integrating instrument is added one;
The piece number of the correct TB that the count value of described correct TB integrating instrument equals to receive, the piece number of the wrong TB that the count value of described wrong TB integrating instrument equals to receive;
The correct TB integrating instrument accumulative total of described each business and wrong TB integrating instrument accumulative total sum equal total TB piece number of each business of receiving respectively.
Described restarting after the controlling object change timer also comprises: the correct TB integrating instrument of other business in all business that reset outside the current business and wrong TB integrating instrument.
The method of the current step value of described calculating is: calculate the poor of current Block Error Rate and target Block Error Rate, this difference and target Block Error Rate are divided by, and income value multiplies each other with the step-length modifying factor of presetting, multiply each other with the step parameter of presetting again.
Described method according to described current step value adjustment target signal interference ratio value comprises:
Whether judge current step value greater than zero, greater than zero, the target signal interference ratio value that then will be provided with promotes current step value size as if described current step value; Otherwise the target signal interference ratio value that will be provided with reduces current step value size.
The method of described computing service Block Error Rate difference permissible error: it is long-pending with default Block Error Rate difference threshold value to calculate default target Block Error Rate.
The described method of determining current control business: the value of discerning the professional traffic flag of current control according to being used to of setting in advance is determined current control business;
The described method that the value of traffic flag is set is: wherein a kind of business of picked at random in composite service, and sign that should business is set to the value of traffic flag; Perhaps, select a kind of business in the composite service as required, and sign that should business is set to the value of traffic flag.
The timing length of described controlling object change timer is set according to the Transmission Time Interval of TB piece;
The method that described Transmission Time Interval according to the TB piece is set the timing length of controlling object change timer is:
Preestablish the Transmission Time Interval of TB piece;
Under the Turbo coded system, the value that described timing length is divided by more than or equal to Transmission Time Interval and Block Error Rate difference threshold value;
Under the convolutional encoding mode, calculate the merchant of Transmission Time Interval and Block Error Rate difference threshold value earlier, the average T B piece number that receives in income value and each Transmission Time Interval is divided by, and selects maximum in described result of being divided by and a Transmission Time Interval value then; Described timing length is more than or equal to this maximum value.
This method further comprises: if judge the target Block Error Rate that the described professional current Block Error Rate of current control that has calculated equals to set in advance, then directly restart outer shroud control and adjust timer.
When in the composite service being single business, this method further comprises:
Close control of turning object change timer.
The method of the current step value of described calculating: calculate the poor of current Block Error Rate and target Block Error Rate, this difference and target Block Error Rate are divided by, income value multiplies each other with the total TB piece number that receives, and multiplies each other with the step-length modifying factor of presetting again, multiplies each other with the step parameter of presetting again.
As seen from the above technical solution, concerning composite service, the present invention handles the business that processing requirements is arranged in the composite service, has guaranteed that each business can both satisfy the service feature requirement in the composite service, and can save resource.In addition, to the business that needs are adjusted, because the present invention has improved the algorithm of adjusting step-length, even the TB piece number that receives in the adjustment cycle exists than great fluctuation process, also BLER converges to target value set the most at last, thereby has guaranteed the effect of control.
Description of drawings
Fig. 1 is the dynamic adjustment flow chart of prior art at the exterior ring power control of single business;
Fig. 2 is the dynamic adjustment flow chart of composite service exterior ring power control of the present invention;
Fig. 3 (a) is BLER convergence analogous diagram when there is discontinuous transmission in TB in the prior art;
Fig. 3 (b) is BLER convergence analogous diagram when there is discontinuous transmission in TB among the present invention.
Embodiment
Core concept of the present invention is: concerning single business, adjust in the timer, by the calculating to the current business Block Error Rate at outer shroud, whether differentiate current business needs to adjust, if need, then calculate current step-length according to current Block Error Rate, TB piece number etc., the target signal interference ratio is adjusted.The inventive method has satisfied the convergence of control, has also saved resource simultaneously;
Concerning composite service, one of them business is as current business, in controlling object change timer in the selected at first at random composite service, by calculating to other professional BLER, judge whether in the error allowed band,, then continue if in the error allowed band; Otherwise, be current business with that business change of current Block Error Rate in these business and target Block Error Rate disparity; Simultaneously, adjust in the timer at outer shroud, by the calculating to the current business Block Error Rate, whether need adjust, if need, then calculate current step-length according to current Block Error Rate, TB piece number etc. if differentiating current business, the target signal interference ratio is adjusted.The inventive method had both guaranteed that each business can both satisfy the service feature requirement in the composite service, had saved resource, had also satisfied the convergence of control simultaneously.
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing preferred embodiment that develops simultaneously, the present invention is described in more detail.
Introduce the dynamic adjusting method of the single professional exterior ring power control of the present invention below earlier, hypothesis is the ascending exterior ring power control of finishing at network side here, and the control business is a certain to be measured professional 1, and method is described below:
Preestablish target signal interference ratio value SIRtar, this target block error rate BLER tar of to be measured professional 1, the also correct TB integrating instrument of initialization, mistake TB integrating instrument are set, outer shroud control is set adjusts timer, the dynamic adjusting method of the single professional exterior ring power control of the present invention may further comprise the steps:
Start outer shroud control and adjust timer T1, the adjustment of outer shroud control adjustment timer T1 is handled and is comprised:
At first, receive the TB piece, the TB piece that receives is carried out CRC check judge whether the TB piece that receives is correct, whether what judge promptly that the CRCI sign shows is the correct sign of TB piece that indication receives, if enter next step after then correct TB integrating instrument being added one; If not, enter next step after then wrong TB integrating instrument being added one.
Such as: the TB piece that indication received when CRCI=1 was set is correct, and during CRCI=0, the TB piece that indication receives is wrong, when judging CRCI=0, wrong TB integrating instrument is added 1; When judging CRCI=1, correct TB integrating instrument is added 1.
Add up TB number of blocks TBt and wrong TB number of blocks TBf correct in the TB piece that receives by above-mentioned verification, for follow-up calculating is prepared.
Then, judge whether timer T1 is adjusted in outer shroud control overtime, if not overtime, then above-mentioned continuation statistics; Otherwise, calculate current block error rate BLER cumu according to TB number of blocks TBt correct in the TB piece of having added up that receives and wrong TB number of blocks TBf, enter next step behind reset respectively afterwards correct TB integrating instrument and the wrong TB integrating instrument.
The method of the current block error rate BLER cumu of aforementioned calculation: at first calculate total TB number of blocks value, be correct TB number of blocks TBt and wrong TB number of blocks TBf sum, the merchant of the TB number of blocks TBf of mistake in computation and total TB number of blocks then, multiply by at last absolutely again and promptly get current block error rate BLER cumu, computing formula is as follows:
BLERcumu＝(TBf/(TBf+TBt))×100％
At last, judge whether current block error rate BLER cumu equals target block error rate BLER tar, if equal, then do not adjust, and restart the statistics of restarting a new round behind the timer; Otherwise, calculate current step value Step Δ, and according to restarting timer behind the current step value Step Δ adjustment target signal interference ratio value SIRtar.
The method of the current step value Step of aforementioned calculation Δ is: current block error rate BLER cumu and target block error rate BLER tar's is poor, the value that this difference and target block error rate BLER tar are divided by, multiply each other with the total TB piece number that receives, multiply each other with step-length modifying factor Factor again, the value of gained after multiplying each other with step parameter StepUn again, formula is as follows:
StepΔ＝(TBt+TBf)×((BLERcumu-BLERtar)/BLERtar)×Factor×StepUn
In the following formula, step-length modifying factor Factor is relevant with the control time delay, and it is long more generally to control time delay, and Factor is more little for the step-length modifying factor; The control time delay is short more, and step-length modifying factor Factor is big more; And step-length modifying factor Factor changes between 0 and 1.For step parameter StepUn, from single user's angle, its value is to be the bigger the better, if too little, can cause BLER distribution variation; If but too big, can cause again disturbing becoming big.Therefore, this value needs compromise.It seems that from the data of emulation and test being that 0.5～1.5dB is counter by the step value Step Δ of maximum pushes away step parameter StepUn, even BLERcumu=100%, the substitution following formula can obtain the value of StepUn.
As can be seen from the above equation, the calculating of current step value Step Δ is not only relevant with current block error rate BLER cumu, the TB piece number of receiving in the adjustment cycle is also depended in its calculating, handle like this, well solved prior art in adjustment cycle because the problem that the control that the TB piece number that receives variation causes does not restrain.
If the Step Δ that calculates illustrates then that greater than zero current block error rate BLER cumu is inferior to target block error rate BLER tar, then promote target signal interference ratio value SIRtar, the amplitude of lifting is the Step Δ, is about to the value that target signal interference ratio value SIRtar increases Step Δ size; If the Step Δ that calculates illustrates then that less than zero current block error rate BLER cumu is better than target block error rate BLER tar, then reduce target signal interference ratio value SIRtar, the amplitude of reduction is the Step Δ, is about to the value that target signal interference ratio value SIRtar reduces Step Δ size.
On the basis of the dynamic adjusting method that the single professional exterior ring power of the present invention is controlled, the dynamic adjusting method that composite service exterior ring power of the present invention is controlled is described in detail:
Fig. 2 is the dynamic adjustment flow chart of composite service exterior ring power of the present invention control, and supposition here is the ascending exterior ring power control finished at network side and is example with three kinds of professional composite service of forming that composite service is respectively professional 1, professional 2 and professional 3.Notice that the composite service here is meant the business that is formed by two or more single combinations of services.
Preestablish each professional target block error rate BLER tari, target signal interference ratio value SIRtar, the also correct TBi integrating instrument of initialization, mistake TBi integrating instrument are set, each professional Block Error Rate difference permissible error is set, and to equal each business objective block error rate BLER tari and Block Error Rate difference threshold value AlterThred respectively long-pending, here, i equals 1,2,3, and expression professional 1, professional 2, professional 3 respectively; Traffic flag Flag is set; According to adjustment cycle outer shroud control is set and adjusts timer T1, controlling object change timer T2 is set simultaneously.
Here, from the control angle, the timing length of outer shroud control adjustment timer T1 should be short more good more, because follow the tracks of more timely like this.Because exterior ring power control is based on BLER's, and the acquisition of BLER need be that the Transmission Time Interval (TTI) of TB piece is in the time interval in minimum, can only arrive TTI so outer shroud is adjusted the timer duration minimum, TTI can be 10ms, 20ms, 40ms and 80ms, and span is greater than 10ms usually.
And determining for controlling object change timer T2 timing length, represent controlling object change timer T2 timing length with Talter, because need consider the scope of error, so can be provided with according to following formula basically, can be in different ways for different coded systems:
(1) Turbo coded system
Talter＞＝TTI/AlterThred
(2) convolutional encoding mode
Talter＞＝max(TTI，TTI/(AlterThred×num_of_TBs_per_TTI))
Wherein AlterThred is a Block Error Rate difference threshold value, and num_of_TBs_per_TTI is the average T B piece number that receives in each TTI.
Such as, suppose that TTI is 20ms, error range is 30%, the average T B piece number that each TTI receives is 4, so
Under the Turbo coded system, Talter＞=20ms/0.3=66.67ms.
Under the convolutional encoding mode, Talter＞=max (20,20/ (0.3 * 4))=20ms
Consider that may there be certain fluctuation in num_of_TBs_per_TTI, so the suggestion of this Talter value equals value between 1.1～2 times of minimum value in the relational expression in the above greatly.
In conjunction with Fig. 2, the inventive method may further comprise the steps:
Step 200: in professional 1, professional 2 and professional 3, one of them professional for current control and current business sign Flag is set to select professional sign of current control of selected these three kinds of business.
In the present embodiment, be to select any one business in professional 1, professional 2 and professional 3 at random as current business, and hypothesis professional 1 be designated 1, professional 2 be designated 2, professional 3 be designated 3.Such as, in the present embodiment, suppose to select professional 1 to be current control business, current business sign Flag=1 represents that current control business is professional 1 so.If select professional 2 be current control business, Flag=2 etc. then.
Step 201: start outer shroud control and adjust timer T1.
Step 202: start-up control object change timer T2.
Started two timers in this method, promptly outer shroud is adjusted timer T1 and controlling object change timer T2, and the boot sequence of these two timers is unimportant.Outer shroud is adjusted the adjustment processing of timer T1 and the change processing procedure of controlling object change timer T2 is separate carrying out, but two processing procedures are again interactional: the change of controlling object change timer T2 handle change to current business directly influence outer shroud adjust the adjustment of timer T1 handle in to the adjustment of target signal interference ratio value SIRtar.Below the adjustment processing of outer shroud adjustment timer T1 and the change processing procedure of controlling object change timer T2 are described in detail:
The adjustment processing that timer T1 is adjusted in outer shroud control may further comprise the steps:
Step 2011: add up the TB piece number that all business receive respectively.
In this step, at network side, the TB piece that receives is carried out CRC check judge whether the TB piece that receives is correct, whether what promptly judge the demonstration of CRCI sign is the correct sign of TB piece that indication receives, if then correct TB integrating instrument is added one; If not, then wrong TB integrating instrument is added one.
Such as: the TB piece that indication received when CRCI=1 was set is correct, and during CRCI=0, the TB piece that indication receives is wrong.
This step is judged all professional CRCI signs respectively, if CRCIi=1 then adds one with correct TBi integrating instrument; If CRCIi=0 then adds one with wrong TBi integrating instrument.Add up TBti piece number and wrong TBfi piece number correct in the TBi piece that each business receives respectively by above-mentioned judgement.Here i=1,2,3.
Calculate each professional Block Error Rate respectively according to following formula:
BLERaucui=(TBfi/ (TBfi+TBti)) * 100%, i=1 here, 2 or 3
This step is to determine current business by the inquiry to the value of current business sign Flag.In the present embodiment, supposed that current business is professional 1, promptly this moment Flag=1.So the current step value computing formula of current business is as follows:
StepΔ1＝(TBt1+TBf1)×((BLERcumu1-BLERtar1)/BLERtar1)×Factor×StepUn1
As can be seen from the above equation, the calculating of current step value Step Δ 1 is not only relevant with current block error rate BLER cumu1, the TB piece number of receiving in the adjustment cycle is also depended in its calculating, handle like this, well solved prior art in adjustment cycle because the problem that the control that the TB piece number that receives variation causes does not restrain.
When BLERcumu1＞BLERtar1, Step Δ 1＞0 promotes Step Δ 1 size with target signal interference ratio value SIRtar and gets final product; When BLERcumu1＜BLERtar1, Step Δ 1＜0 reduces Step Δ 1 size with target signal interference ratio value SIRtar and gets final product.
Like this, different inner loop powers control signal interference ratio (SIR) desired values are set, thereby make the error rate that receives TB piece number reach the BLER desired value of expection, guaranteed to receive the accuracy of TB piece number by this method.
The change of controlling object change timer T2 is handled and be may further comprise the steps:
Step 2021: add up the TB piece number that surplus lines receives respectively.
This step is that the TB piece number that other business in all business except that current business receives is added up respectively, and correct TBtj piece number and the wrong Tbfj piece number of adding up each business respectively carry out, according to the hypothesis of step 200, promptly professional 1 is current business, so, j=2 here, 3.
The method of the Block Error Rate of above-mentioned computing service respectively 2 and business 3 is:
BLERaucu2＝(TBf2/(TBf2+TBt2))×100％；
BLERaucu3＝(TBf3/(TBf3+TBt3))×100％。
Calculate then: the absolute value of the difference of BLERaucu2 and BLERtar2; The absolute value of the difference of BLERaucu3 and BLERtar3, formula is as follows:
diff2＝|BLERaucu2-BLERtar2|；
diff3＝|BLERaucu3-BLERtar3|。
Select among diff2 and the diff3 maximum one at last, hypothesis here, diff2＞diff3.
In this step, Block Error Rate difference permissible error equals target block error rate BLER tari and Block Error Rate difference threshold value AlterThred is long-pending, is pre-set.
If diff2＞BLERtar2 * AlterThred, so that current control is professional from professional 1 business of changing to 2, and the surplus lines that resets is used for the ASSOCIATE STATISTICS amount of statistics of error rate, correct TB1 integrating instrument, the mistake TB1 integrating instrument of the business 1 that promptly resets, professional 3 correct TB3 integrating instrument, mistake TB3 integrating instrument reset;
If diff2＜=BLERtar2 * AlterThred, so current control business also remains professional 1, the surplus lines that only need reset is used for the ASSOCIATE STATISTICS amount of statistics of error rate, correct TB2 integrating instrument, the mistake TB2 integrating instrument of the business 2 that promptly resets, professional 3 correct TB3 integrating instrument, mistake TB3 integrating instrument reset.
Return the circulation that step 202 is carried out next round afterwards again.
The process of adjusting timer processing and controlling object change timer processing from above-mentioned outer shroud control can clearly be seen that, the business that processing requirements is arranged in the composite service is handled, guaranteed that each business can both satisfy the service feature requirement in the composite service, business in the permissible error scope no longer deals with simultaneously, can save resource.And the current step value that adopts in handling, owing to considered the TB piece number that receives in the adjustment cycle, even having guaranteed the reception piece number in the adjustment cycle takes place also can finely finish control than great fluctuation process, i.e. control restrains.
Dynamic adjustment for the professional exterior ring power control of list, for program resource is shared, also can be on the basis of combinations thereof operational approach, only need above-mentioned controlling object change timer T2 is closed, promptly only start outer shroud control and adjust timer T1, use in the dynamic adjusting method of composite service exterior ring power of the present invention control, outer shroud control is adjusted the adjustment processing procedure of timer T1 institute to single professional dynamic adjustment that exterior ring power is controlled of can carrying out equally, is implemented as follows:
At first, start outer shroud control and adjust timer T1, add up the TB piece number that this business receives, and calculate respectively according to the CRC check result that correct TB piece is counted TBt and wrong TB piece is counted TBf.
Then, judge that whether timer T1 is adjusted in outer shroud control overtime, if not overtime, then continues the TB piece number that statistics receives; Otherwise, calculate this professional current business block error rate BLER aucu, here, BLERaucu=(TBf/ (TBf+TBt)) * 100%.
At last, judge whether current business block error rate BLER aucu equals its target block error rate BLER tar,, then restart outer shroud control and adjust timer T1 if equal; Otherwise, calculate the current step value Step Δ of this business, and adjust according to current step value Step Δ and to restart outer shroud control behind the target signal interference ratio value SIRtar and adjust timer T1.
The formula that timer T1 is comprised is adjusted in outer shroud control in the dynamic adjusting method of the computational methods employing composite service exterior ring power control of the present invention of current here step value Step Δ:
StepΔ＝(TBt+TBf)×((BLERcumu-BLERtar)/BLERtar)×Factor×StepUn
According to current step value Step Δ, this business dynamically adjusted get final product.Handle like this, owing to the TB piece number of having considered to receive in the adjustment cycle, take place also can finely finish control than great fluctuation process even guaranteed the reception piece number in the adjustment cycle equally, control also restrains.
About this point, BLER convergence analogous diagram further specifies in the time of can having discontinuous transmission referring to TB shown in Figure 3:
Fig. 3 (a) is BLER convergence analogous diagram when there is discontinuous transmission in TB in the prior art, and Fig. 3 (b) is BLER convergence analogous diagram when there is discontinuous transmission in TB among the present invention, and the figure among Fig. 3 (a) is consistent with the simulated conditions that figure (b) adopts.
The first half waveform is that the TB piece that sends is counted information among Fig. 3 (a), and the latter half waveform is the BLER that calculates according to existing method.As can be seen from the figure, at ta constantly, the TB piece number of transmission is in discrete state, and the value of BLER fluctuation at this moment is bigger, can not converge on the null value.
The first half waveform is that the TB piece that sends is counted information among Fig. 3 (b), and the latter half waveform is the BLER that calculates according to the inventive method.As can be seen from the figure, at tb constantly, the TB piece number of transmission is in discrete state, and this converges on the null value value of BLER well.
In addition, the foregoing description is controlled to be example with ascending exterior ring power, because exterior ring power control divides upload control and descending control, ascending exterior ring power is controlled at network side and finishes, and descending power is controlled at travelling carriage and finishes.And the ascending exterior ring power control method that control is adopted with downlink outer loop power is identical, so present embodiment is equally applicable to the control of downlink outer loop power to single method for controlling up link external ring power professional and composite service.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (12)
1. the dynamic adjusting method of composite service exterior ring power control, it is characterized in that, be provided with and start outer shroud control and adjust timer and controlling object change timer, this method comprises that adjusting outer shroud control adjusts timer and controlling object change timer two parts
The processing that timer is adjusted in described adjustment outer shroud control may further comprise the steps:
Determine current control business, after judging that the professional current Block Error Rate of current control that has calculated is not equal to the target Block Error Rate that sets in advance, calculate the professional current step value of current control, and, restart outer shroud control then and adjust timer according to the target signal interference ratio value that described current step value adjustment has been provided with;
The processing of described adjustment controlling object change timer may further comprise the steps:
The current Block Error Rate of other business in definite also statistical combination business except that current control business, calculate the poor of the current Block Error Rate of the business added up and the pairing target Block Error Rate that has been provided with of this business, determine maximum difference, judge that whether this maximum difference is greater than the pairing professional Block Error Rate difference permissible error value that has calculated of this maximum difference, if greater than, then change being used to of setting in advance and discern the sign of the value of the professional traffic flag of current control, restart controlling object change timer then for this maximum pairing business of difference; Otherwise, directly restart controlling object change timer.
2. method according to claim 1 is characterized in that, the computational methods of described current Block Error Rate may further comprise the steps:
Add up piece number and the wrong TB piece number of the correct transmission block TB that receives respectively, determine the total TB piece number that receives according to the TB piece number of correct TB piece number and mistake;
The TB piece number of application error multiplies each other afterwards again with absolutely divided by the total TB piece number that receives, and obtains current Block Error Rate.
3. method according to claim 2 is characterized in that, the method for the TB piece number of the piece number of the correct transmission block TB that described statistics receives and mistake is:
Set in advance respectively and the initialization composite service in the correct TB integrating instrument, the wrong TB integrating instrument of each business of each business, the demonstration CRC check result's of each business detection sign CRCI is set;
Respectively each professional TB piece in the composite service that receives is carried out CRC check,
Whether what judge the demonstration of CRCI sign is the correct sign of TB piece that indication receives, if then correct TB integrating instrument is added one; If not, then wrong TB integrating instrument is added one;
The piece number of the correct TB that the count value of described correct TB integrating instrument equals to receive, the piece number of the wrong TB that the count value of described wrong TB integrating instrument equals to receive;
The correct TB integrating instrument accumulative total of described each business and wrong TB integrating instrument accumulative total sum equal total TB piece number of each business of receiving respectively.
4. method according to claim 3 is characterized in that, described restarting after the controlling object change timer also comprises: the correct TB integrating instrument of other business in all business that reset outside the current business and wrong TB integrating instrument.
5. method according to claim 2 is characterized in that,
The method of the current step value of described calculating is: calculate the poor of current Block Error Rate and target Block Error Rate, this difference and target Block Error Rate are divided by, and income value multiplies each other with the step-length modifying factor of presetting, multiply each other with the step parameter of presetting again.
6. method according to claim 1 is characterized in that, described method according to described current step value adjustment target signal interference ratio value comprises:
Whether judge current step value greater than zero, greater than zero, the target signal interference ratio value that then will be provided with promotes current step value size as if described current step value; Otherwise the target signal interference ratio value that will be provided with reduces current step value size.
7. method according to claim 1 is characterized in that, the method for described computing service Block Error Rate difference permissible error: it is long-pending with default Block Error Rate difference threshold value to calculate default target Block Error Rate.
8. method according to claim 1 is characterized in that,
The described method of determining current control business: the value of discerning the professional traffic flag of current control according to being used to of setting in advance is determined current control business;
The described method that the value of traffic flag is set is: wherein a kind of business of picked at random in composite service, and sign that should business is set to the value of traffic flag; Perhaps, select a kind of business in the composite service as required, and sign that should business is set to the value of traffic flag.
9. method according to claim 2 is characterized in that, the timing length of described controlling object change timer is set according to the Transmission Time Interval of TB piece;
The method that described Transmission Time Interval according to the TB piece is set the timing length of controlling object change timer is:
Preestablish the Transmission Time Interval of TB piece;
Under the Turbo coded system, the value that described timing length is divided by more than or equal to Transmission Time Interval and Block Error Rate difference threshold value;
Under the convolutional encoding mode, calculate the merchant of Transmission Time Interval and Block Error Rate difference threshold value earlier, the average T B piece number that receives in income value and each Transmission Time Interval is divided by, and selects maximum in described result of being divided by and a Transmission Time Interval value then; Described timing length is more than or equal to this maximum value.
10. method according to claim 1 is characterized in that, this method further comprises: if judge the target Block Error Rate that the described professional current Block Error Rate of current control that has calculated equals to set in advance, then directly restart outer shroud control and adjust timer.
11. method according to claim 1 is characterized in that, when composite service was single business, this method further comprised:
Close control of turning object change timer.
12. according to claim 2 or 11 described methods, it is characterized in that, the method of the current step value of described calculating: calculate the poor of current Block Error Rate and target Block Error Rate, this difference and target Block Error Rate are divided by, income value multiplies each other with the total TB piece number that receives, multiply each other with the step-length modifying factor of presetting again, multiply each other with the step parameter of presetting again.
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| CNB200510007516XA CN100442680C (en) | 2005-02-05 | 2005-02-05 | Dynamic regulating method for power control |
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| CN100442680C true CN100442680C (en) | 2008-12-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102291765B (en) * | 2010-06-21 | 2016-03-30 | 中兴通讯股份有限公司 | A kind of outer-loop power controlling method and device |
| CN102223698B (en) * | 2011-06-07 | 2015-04-22 | 大唐移动通信设备有限公司 | Method and equipment for dynamically adjusting change step length of signal-to-noise ratio in outer-loop power control process |
| CN105634655B (en) * | 2014-10-27 | 2019-03-22 | 普天信息技术有限公司 | A kind of method and system of MCS selection adjusting thresholds |
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