CN101202571B - Method for reducing HS-SCCH channel outer ring power control step length cumulative effect - Google Patents
Method for reducing HS-SCCH channel outer ring power control step length cumulative effect Download PDFInfo
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- CN101202571B CN101202571B CN2006101653049A CN200610165304A CN101202571B CN 101202571 B CN101202571 B CN 101202571B CN 2006101653049 A CN2006101653049 A CN 2006101653049A CN 200610165304 A CN200610165304 A CN 200610165304A CN 101202571 B CN101202571 B CN 101202571B
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Abstract
The invention discloses a method for reducing the outer loop power control adjustment step additive effect of an HS-SCCH channel, which is used for adjusting the outer loop power control adjustment step of the HS-SCCH channel through the node B of a WCDMA system to reduce the additive effect. The method includes that: step one, the statistics of the error block parameters of the HS-SCCH channel is carried out by the node B regularly and the outer loop power control adjustment step is ensured through the error block parameters; step two, the outer loop power control adjustment step and the historical power control steps are filtered to get the filtered outer loop power control adjustment step; step three, the power of the HS-SCCH channel is adjusted by utilizing the filtered outer loop power control adjustment step and then returns to the step one for repeat implement. Adopting the method of the invention greatly reduces the outer loop power control step additive effect of the HS-SCCH channel and increases the real time performance of the outer loop power control adjustment of the HS-SCCH channel and increases the adjusting effect of the outer loop power control.
Description
Technical field
The present invention relates to (the High Speed Shared ControlChannel of HS-SCCH in the mobile communcations system, High-Speed Shared Control Channel) the power control processing method of channel, when particularly relating to the MAC-hs scheduling of the NodeB of WCDMA system, reduce the method for HS-SCCH channel outer ring power control step-length additive effect.
Background technology
WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) MAC-hs of the NodeB of system (Node B) (Medium Access Control-high speed, the control of high speed medium access) when dispatching, to be UE (the User Equipment of each scheduling, subscriber equipment) the HS-SCCH channel of selecting for use is determined suitable transmission power, because the variation of channel architecture and the difference of user velocity, fixing power excursion differs and meets the demands surely, and therefore the adjusting by external circule power control solves this problem.
The power control of HS-SCCH channel outer ring is meant feedback result (the DTX:HS-SCCH mistake piece of NodeB according to HS-DPCCH (High SpeedDedicated Physical Control Channel, High-Speed Dedicated Physical Control Channel) channel; ACK/NACK:HS-SCCH is correct) calculating external circule power control (adjusting) step-length, and the process of regulating the HS-SCCH channel emission power with the external circule power control step-length.System preestablishes mistake block period ErrBlockPeriod and mistake piece thresholding ErrBlockThreold, regularly adds up the mistake piece of HS-SCCH channel and counts ErrBlockCnt.If current time interval CurrentTimePeriod counts ErrBlockCnt above mistake piece thresholding ErrBlockThreold, the HS-SCCH channel outer ring power control step-length that then adds up OutLoopStep less than mistake block period ErrBlockPeriod and mistake piece.Be lower than mistake piece thresholding ErrBlockThreold if current time interval CurrTimeInterval counts ErrBlockCnt more than or equal to mistake block period ErrBlockPeriod and mistake piece, then reduce HS-SCCH external circule power control step-length OutLoopStep, as shown in Figure 1.DTX (Discontinuous Transmission) is discontinuous transmission, and ACK is for just responding, and NACK is a Negative Acknowledgment.The flow process of Fig. 1 specifically comprises the steps:
Whether step 102 judges current time interval CurrTimeInterval more than or equal to mistake block period ErrBlockPeriod, if, execution in step 1021, otherwise execution in step 1023;
In this step, current time interval CurrTimeInterval is for beginning the time interval till current from record mistake piece number.
Step 103, this external circule power control step-length is adjusted Δ OutLoopStep (n)=0, changes step 104 over to;
OutLoopStep(n)＝OutLoopStep(n-1)+ΔOutLoopStep(n)；
Wherein, natural number n regulates number of times for the external circule power control step-length, and Δ is a variable quantity.
In system's running, continue when certain value if the mistake piece number of HS-SCCH channel is more stable, the external circule power control step-length will add up gradually, even can be added to the top.When in case the mistake piece of HS-SCCH channel is counted the generation changing inversely like this, the external circule power control step-length needs a very long time just can remove the influence of historical step-length additive effect, and the historical step-length that adds up has before followed channel conditions at that time not meet, the variation that this just can not reflect current channel condition has timely weakened the regulating action of external circule power control.Especially be provided with when improper as the mistake block period ErrBlockPeriod of HS-SCCH channel and mistake piece thresholding ErrBlockThreold, this problem shows more outstandingly.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of the HS-SCCH of reduction channel outer ring power control step-length additive effect, is used for effectively reducing the additive effect of HS-SCCH channel outer ring power control step-length.
To achieve these goals, the invention provides a kind of method of the HS-SCCH of reduction channel outer ring power control step-length additive effect, be used for regulating the external circule power control step-length reduction additive effect of HS-SCCH channel, it is characterized in that this method comprises by WCDMA system node B:
Step 1, the mistake piece parameter of regularly adding up described HS-SCCH channel by described Node B, and determine that according to described mistake piece parameter this external circule power control regulates step-length;
Step 2 is regulated step-length with described this external circule power control and historical power control adjusting step-length is carried out filtering, obtains filtered external circule power control and regulates step-length; And
Step 3 is utilized described filtered external circule power control to regulate step-length the power of described HS-SCCH channel is adjusted, and returns described step 1 and repeat.
The method of described reduction HS-SCCH channel outer ring power control step-length additive effect, wherein, in the described step 1, described mistake piece parameter comprises: mistake piece number, current time interval, mistake block period, mistake piece thresholding; Described current time interval is for beginning the time interval till current from record mistake piece number.
The method of described reduction HS-SCCH channel outer ring power control step-length additive effect, wherein, in the described step 1, also comprise: one judges that whether described current time interval is more than or equal to the described step of block period by mistake, if judge further that then whether described mistake piece number is smaller or equal to described mistake piece thresholding; Otherwise, judge that further whether described mistake piece number is greater than described mistake piece thresholding.
The method of described reduction HS-SCCH channel outer ring power control step-length additive effect, wherein, describedly judge that described mistake piece number is whether in the step smaller or equal to described mistake piece thresholding, if described mistake piece number is smaller or equal to described mistake piece thresholding, show that then described this external circule power control adjusting step-length is less than zero, otherwise, show that described this external circule power control adjusting step-length equals zero.
The method of described reduction HS-SCCH channel outer ring power control step-length additive effect, wherein, describedly judge that described mistake piece number is whether in the step greater than described mistake piece thresholding, if described mistake piece number is greater than described mistake piece thresholding, show that then described this external circule power control adjusting step-length is greater than zero, otherwise, show that described this external circule power control adjusting step-length equals zero.
The method of described reduction HS-SCCH channel outer ring power control step-length additive effect, wherein, in the described step 2, described this external circule power control is regulated the step that step-length and historical power control adjusting step-length carry out filtering be specially:
OutLoopStep(n)＝a*OutLoopStep(n-1)+(1-a)*ΔOutLoopStep(n)；
Wherein, OutLoopStep (n) is that filtered external circule power control is regulated step-length, and OutLoopStep (n-1) is that step-length is regulated in historical power control, and Δ OutLoopStep (n) regulates step-length for this external circule power control, natural number n regulates number of times for the external circule power control step-length, and a is a filtering factor.
The method of described reduction HS-SCCH channel outer ring power control step-length additive effect, wherein, described a value is regulated as required.
The method of described reduction HS-SCCH channel outer ring power control step-length additive effect, wherein, in the described step 3, also comprise the power of described HS-SCCH channel adjusted after, the step that the mistake piece number and the current time interval of described HS-SCCH channel correspondence made zero.
Adopt the method for the invention, do not have the method for filtering to compare with original, greatly reduce the additive effect of the external circule power control step-length of HS-SCCH channel, the real-time that makes the external circule power control of HS-SCCH channel regulate is strengthened, and has strengthened the regulating action of external circule power control.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is that at present general HS-SCCH channel outer ring power control step-length is regulated flow chart;
Fig. 2 is that flow chart is regulated in HS-SCCH channel outer ring power control step-length filtering of the present invention.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is done and to be described in further detail.
Illustrated embodiment of the present invention, be at the MAC-hs of the NodeB of WCDMA system (Node B) scheduling and improved, wherein, NodeB (Node B) overcomes problems of the prior art by regulating the external circule power control step-length.The power control of HS-SCCH channel outer ring is meant feedback result (the DTX:HS-SCCH mistake piece of NodeB according to the HS-DPCCH channel; ACK/NACK:HS-SCCH is correct) calculating external circule power control (adjusting) step-length, and the process of regulating the HS-SCCH channel emission power with the external circule power control step-length.
Seeing also Fig. 2, is that flow chart is regulated in HS-SCCH channel outer ring power control step-length filtering of the present invention, specifically describes as follows:
Step 201 is regularly added up the mistake piece of HS-SCCH channel and is counted ErrBlockCnt;
Whether step 202 judges current time interval CurrTimeInterval more than or equal to mistake block period ErrBlockPeriod, if, execution in step 2021, otherwise execution in step 2023;
In this step, current time interval CurrTimeInterval is for beginning the time interval till current from record mistake piece number.
Step 2021 judges that further whether piece counts ErrBlockCnt smaller or equal to mistake piece thresholding ErrBlockThreold by mistake, if, execution in step 2022, otherwise execution in step 203;
Step 2023 judges that further whether piece counts ErrBlockCnt greater than mistake piece thresholding ErrBlockThreold by mistake, if, execution in step 2024, otherwise execution in step 203;
Step 2022, this external circule power control step-length is adjusted Δ OutLoopStep (n)＜0, changes step 204 over to;
Step 2024, this external circule power control step-length is adjusted Δ OutLoopStep (n)＞0, changes step 204 over to;
Step 203, this external circule power control step-length is adjusted Δ OutLoopStep (n)=0, changes step 204 over to;
Step 204 is carried out filtering OutLoopStep (n-1) with this external circule power control step-length adjustment Δ OutLoopStep (n) with historical power control step-length and is carried out filtering, obtains new external circule power control step-length OutLoopStep (n).General filtering formula is as follows:
OutLoopStep(n)＝a*OutLoopStep(n-1)+(1-a)*ΔOutLoopStep(n)；
Wherein, a is a filtering factor, can regulate as required;
Step 205, utilize filtered external circule power control step-length OutLoopStep (n) to regulate the power of HS-SCCH channel, after the power adjustments, the mistake piece of HS-SCCH channel correspondence is counted ErrBlockCnt and current time interval CurrTimeInterval returns 0, and return step 201.
In the foregoing description, determined this external circule power control step-length OutLoopStep (n) according to the above-mentioned relation that the mistake piece of HS-SCCH channel is counted between ErrBlockCnt, current time interval CurrTimeInterval and mistake block period ErrBlockPeriod, the mistake piece thresholding ErrBlockThreold;
Wherein, the mistake piece is counted ErrBlockCnt, current time interval CurrTimeInterval, mistake block period ErrBlockPeriod, mistake piece thresholding ErrBlockThreold belong to mistake piece relevant parameter.
The present invention reduces the additive effect of power control step-length by the method for the external circule power control step-length being carried out filtering, progressively filters the influence of historical step-length additive effect, has strengthened the real-time that external circule power control is regulated.Simultaneously this filtering mode also is the characteristics that meet mobile communication.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1. a method that reduces HS-SCCH channel outer ring power control step-length additive effect is used for reducing additive effect by the external circule power control step-length of WCDMA system node B adjusting HS-SCCH channel, it is characterized in that this method comprises:
Step 1, the mistake piece parameter of regularly adding up described HS-SCCH channel by described Node B, and determine that according to described mistake piece parameter this external circule power control regulates step-length;
Step 2 is regulated step-length with described this external circule power control and historical power control adjusting step-length is carried out filtering, obtains filtered external circule power control and regulates step-length; And
Step 3 is utilized described filtered external circule power control to regulate step-length the power of described HS-SCCH channel is adjusted, and returns described step 1 and repeat.
2. the method for reduction HS-SCCH channel outer ring power control step-length additive effect according to claim 1 is characterized in that in the described step 1, described mistake piece parameter comprises: mistake piece number, current time interval, mistake block period, mistake piece thresholding; Described current time interval is for beginning the time interval till current from record mistake piece number.
3. the method for reduction HS-SCCH channel outer ring power control step-length additive effect according to claim 2, it is characterized in that, in the described step 1, also comprise: one judges that whether described current time interval is more than or equal to the described step of block period by mistake, if judge further that then whether described mistake piece number is smaller or equal to described mistake piece thresholding; Otherwise, judge that further whether described mistake piece number is greater than described mistake piece thresholding.
4. the method for reduction HS-SCCH channel outer ring power control step-length additive effect according to claim 3, it is characterized in that, describedly judge that described mistake piece number is whether in the step smaller or equal to described mistake piece thresholding, if described mistake piece number is smaller or equal to described mistake piece thresholding, show that then described this external circule power control adjusting step-length is less than zero, otherwise, show that described this external circule power control adjusting step-length equals zero.
5. the method for reduction HS-SCCH channel outer ring power control step-length additive effect according to claim 3, it is characterized in that, describedly judge that described mistake piece number is whether in the step greater than described mistake piece thresholding, if described mistake piece number is greater than described mistake piece thresholding, show that then described this external circule power control adjusting step-length is greater than zero, otherwise, show that described this external circule power control adjusting step-length equals zero.
6. according to the method for the arbitrary described reduction HS-SCCH of claim 1-5 channel outer ring power control step-length additive effect, it is characterized in that, in the described step 2, described this external circule power control regulated the step that step-length and historical power control adjusting step-length carry out filtering be specially:
OutLoopStep(n)＝a*OutLoopStep(n-1)+(1-a)*ΔOutLoopSTep(n)；
Wherein, OutLoopStep (n) is that filtered external circule power control is regulated step-length, and OutLoopStep (n-1) is that step-length is regulated in historical power control, and Δ OutLoopStep (n) regulates step-length for this external circule power control, natural number n regulates number of times for the external circule power control step-length, and a is a filtering factor.
7. the method for reduction HS-SCCH channel outer ring power control step-length additive effect according to claim 6 is characterized in that described a value is regulated as required.
8. according to claim 2,3,4, the 5 or 7 described methods that reduce HS-SCCH channel outer ring power control step-length additive effects, it is characterized in that, in the described step 3, also comprise the power of described HS-SCCH channel adjusted after, the step that the mistake piece number and the current time interval of described HS-SCCH channel correspondence made zero.
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| CN101594668B (en) * | 2009-06-30 | 2011-11-23 | 中兴通讯股份有限公司 | Method and device for controlling HS-SCCH power |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1360410A (en) * | 2000-12-22 | 2002-07-24 | 华为技术有限公司 | Signal-interference ratio (SIR) threshould regulation method for power control |
| CN1369972A (en) * | 2001-02-15 | 2002-09-18 | 深圳市中兴通讯股份有限公司 | Reverse external-loop power control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1360410A (en) * | 2000-12-22 | 2002-07-24 | 华为技术有限公司 | Signal-interference ratio (SIR) threshould regulation method for power control |
| CN1369972A (en) * | 2001-02-15 | 2002-09-18 | 深圳市中兴通讯股份有限公司 | Reverse external-loop power control method |
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