CN1885754A - Closed-loop power control method for reverse supplementary channel - Google Patents
Closed-loop power control method for reverse supplementary channel Download PDFInfo
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- CN1885754A CN1885754A CNA2005100773477A CN200510077347A CN1885754A CN 1885754 A CN1885754 A CN 1885754A CN A2005100773477 A CNA2005100773477 A CN A2005100773477A CN 200510077347 A CN200510077347 A CN 200510077347A CN 1885754 A CN1885754 A CN 1885754A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/16—Deriving transmission power values from another channel
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
本发明涉及一种反向补充信道的闭环功控方法，该方法主要包括：对R－SCH(反向补充信道)和R－FCH(反向基本信道)的帧质量组合情况进行统计；根据所述统计结果，对R－SCH功率进行调整。利用本发明所述方法，可以保证在R－FCH误码率收敛于目标误码率的同时，实现对R－SCH的独立闭环功控，使R－SCH误码也很好地收敛于目标误码率。
The invention relates to a closed-loop power control method of a reverse supplementary channel. The method mainly includes: making statistics on the frame quality combinations of R-SCH (reverse supplementary channel) and R-FCH (reverse fundamental channel); Adjust the R-SCH power according to the above statistical results. By using the method of the present invention, it can be ensured that when the bit error rate of R-FCH converges to the target bit error rate, the independent closed-loop power control of R-SCH can be realized, so that the bit error rate of R-SCH can also converge well to the target error rate. code rate.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of closed-loop power control method of reverse complemental channel.
Background technology
Radio communication plays a part more and more important in the communication in future, and CDMA (code division multiple access) will become the main wireless access technology of 3-G (Generation Three mobile communication system).At present, international CDMA standard is mainly by American National Standard Committee's exploitation promulgation.IS2000 is one of standard of 3-G (Generation Three mobile communication system).
In RCLPC (back closed loop power control) function of the reverse traffic channel of the 3-G (Generation Three mobile communication system) of using the IS2000 standard, the power control of reverse traffic channel is finished by R-PILOT (Reverse Pilot Channel).BSC (base station controller) adjusts R-PILOT power with reverse power control bit with 800 hertz speed.And the power bias relative fixed of R-FCH (Reverse Fundamental Channel), R-SCH (reverse complemental channel) and R-PILOT, as shown in Figure 1, therefore, the power of R-FCH, R-SCH changes with the variation of R-PILOT power.
The purpose of RCLPC is when guaranteeing one or more Traffic Channel target FER (error rate), makes the reverse capacity of Traffic Channel reach maximum.When a Traffic Channel (as R-FCH) only being arranged when being activated, the algorithm of RCLPC is fairly simple: BSC adjusts the power of R-FCH according to the R-FCH frame quality that receives by the power of adjusting R-PILOT.But when being activated, the realization of RCLPC function is just relatively more difficult as many Traffic Channels (as R-FCH, R-SCH).At this moment, the RCLPC function should guarantee the power control of R-FCH according to R-FCH frame quality, again can be according to R-SCH frame quality, and independent control R-SCH power.In addition, there is the erroneous judgement situation in base station CSM5000 chip when distinguishing SCH mistake frame and SCH DTX (noncontinuity emission) frame.This has brought difficulty also for the realization of RCLPC function.
A kind of schematic diagram of method of RCLPC (back closed loop power control) function that realizes reverse traffic channel as shown in Figure 2 in the prior art.
This method is superimposed R-FCH closed-loop power control and R-SCH closed-loop power control.In the power control outer ring portion of BSC, back closed loop power control algorithm synthesis the frame quality of R-FCH and R-SCH, produce an outer shroud set point, according to this outer shroud set point, utilize a control channel, adjust R-PILOT power, R-FCH and R-SCH power are carried out Synchronization Control with reverse power control bit.
The shortcoming of this method is: in this method, R-SCH fixes with the power bias of the relative R-PILOT of R-FCH, and the difference power between R-SCH and the R-FCH also continues to have simultaneously.Can not be independently to the closed-loop power control that carries out of R-SCH and R-FCH, when the radio characteristics of these two Traffic Channels has difference, can not be respectively their power be carried out the differentiation adjustment.The error rate of R-SCH and R-FCH can not converge on target error rate simultaneously.
The schematic diagram of the method for RCLPC (back closed loop power control) function of another kind of realization reverse traffic channel as shown in Figure 3 in the prior art.
This method comprises two parts to the operation that R-FCH and R-SCH carry out power control.According to the frame quality of R-FCH,, adjust the power of R-FCH and R-SCH indirectly by power control bit control R-PILOT; Meanwhile, according to the frame quality of R-SCH,, change the power bias G between R-SCH and the R-PILOT by layer 3 message
R_SCH, the power of adjustment R-SCH.
The shortcoming of this method is: in the method, R-SCH power is by two different power control operation effects simultaneously, and two different power control operations are superimposed, and do not coordinate each other.Therefore, the R-SCH error rate can not guarantee to converge on target error rate.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the closed-loop power control method that the purpose of this invention is to provide a kind of reverse complemental channel, thereby when guaranteeing that the R-FCH error rate converges on target error rate, realization makes the R-SCH error code also converge on target error rate well to the independent closed-loop power control of R-SCH.
The objective of the invention is to be achieved through the following technical solutions:
A kind of closed-loop power control method of reverse complemental channel comprises:
A, the frame mass combination situation of reverse complemental channel R-SCH and Reverse Fundamental Channel R-FCH is added up;
B, according to described statistics, R-SCH power is adjusted.
Described steps A specifically comprises:
R-SCH and R-FCH are made up according to good frame and two kinds of quality situations of bad frame respectively, every kind of combined situation is carried out the frame statistics.
Described steps A also comprises:
R-SCH and R-SCH noncontinuity emission DTX are made up according to good frame and two kinds of quality situations of bad frame respectively, every kind of combined situation is carried out the frame statistics.
Described steps A also comprises:
Fragmentary discontinuous DTX frame is added up according to the R-SCH bad frame.
Described steps A specifically comprises:
A1, an observation window is set;
A2, the statistics in described observation window, the frame sum of every kind of combined situation.
Described step B specifically comprises:
B1, according to described statistics, calculate the power deviation G between R-SCH and the Reverse Pilot Channel R-PILOT
R-SCHThe G that adjusts
R-SCHAdjustment amount;
B2, according to described G
R-SCHAdjustment amount is adjusted R-SCH power.
Described step B1 specifically comprises:
B11, according to described statistics, calculate under every kind of combined situation G
R-SCHThe G that adjusts
R-SCHAdjustment amount;
G under B12, the basis every kind of situation that calculates
R-SCHAdjustment amount obtains final G
R-SCHAdjustment amount.
Described step B1 specifically comprises:
Calculate G
R-SCHAdjustment amount can adopt the method for fixed cycle or variable period to carry out.
Described step B2 specifically comprises:
B21, base station send idle message to travelling carriage, with described G
R-SCHAdjustment amount sends travelling carriage to;
B22, travelling carriage are according to the described G that receives
R-SCHAdjustment amount is to G
R-SCHAdjust, R-SCH power is adjusted.
Described step B2 specifically comprises:
To G
R-SCHAdjustment can finish by inversed business channel power composing factor Reverse_Channel_Adjustment_Gain.
Described R-SCH and R-SCH can be R-SCH and the R-SCH in the CDMA systems of using the IS2000 standard.
As seen from the above technical solution provided by the invention, the present invention compares with prior art, has following advantage: the present invention calculates G by comprehensive statistics R-FCH, R-SCH frame quality situation
R-SCHAdjustment amount can make R-SCH power independently adjust, can guarantee again to the power adjustment of R-SCH not with the mutual coupling of power adjustment of R-FCH.When guaranteeing the convergence of the R-FCH error rate, realize independent closed-loop power control to R-SCH, make the R-SCH error rate also converge on target error rate well; The present invention treats with a certain discrimination R-SCH DTX, has reduced the influence that base station erroneous judgement R-SCH frame quality causes power control.
Description of drawings
Fig. 1 is the power relation schematic diagram of R-FCH, R-SCH and R-PILOT;
Fig. 2 is the schematic diagram of a kind of method of the RCLPC function that realizes reverse traffic channel in the prior art;
Fig. 3 is the schematic diagram of the method for the RCLPC function of another kind of realization reverse traffic channel in the prior art;
Fig. 4 is the schematic diagram of the method for the invention;
Fig. 5 is the concrete process chart of the method for the invention.
Embodiment
The invention provides a kind of closed-loop power control method of reverse complemental channel.Core of the present invention is: by comprehensive statistics R-FCH, R-SCH frame quality quality situation, calculate the power bias G of R-SCH with respect to R-PILOT
R-SCHAdjustment amount, realize the independent of R-SCH power adjusted.
Describe the present invention in detail below in conjunction with accompanying drawing, the schematic diagram of the method for the invention as shown in Figure 4.Its principle is: the R-SCH closed-loop power control is acted on " R-FCH closed-loop power control "." R-FCH closed-loop power control " finishes the high frequency to R-FCH, R-SCH, meticulous control, and " R-SCH closed-loop power control " finishes the independent replenishment control to R-SCH.
According to R-FCH, R-SCH frame quality situation, when definite R-FCH converges on target FER, and R-SCH by R-SCH closed-loop power control algorithm, sets up Mathematical Modeling when not converging on target FER, derives G
R-SCHThe computing formula of adjustment amount, and definite G
R-SCHThe value of adjustment amount.Then, according to this G
R-SCHAdjustment amount is adjusted power bias G
R-SCH, make R-SCH reach target FER.
When R-FCH does not converge on target FER, illustrate that R-PILOT power is improper, need adjust, the R-SCH closed-loop power control has lost the benchmark of adjusting.At this moment, can not adjust power bias G
R-SCH, can not carry out the R-SCH closed-loop power control, otherwise R-SCH power will be repeated to adjust, and form the coupling of adjusting with R-FCH power.
The concrete handling process of the method for the invention as shown in Figure 5.Comprise the steps:
Step 5-1, an observation window is set in reverse traffic channel.
The present invention at first need be provided with an observation window in reverse traffic channel, the size of this observation window can preestablish according to actual needs, such as being the W frame.
Step 5-2, startup observation window are added up the frame mass combination situation of R-SCH, R-FCH.
When needs carry out closed-loop power control to R-SCH, start the observation window of described setting, the frame mass combination situation of R-SCH, R-FCH is added up.The present invention has been divided into frame, two kinds of situations of bad frame respectively with R-FCH and R-SCH, and makes up, and obtains four kinds of combined situation.Then, four kinds of combined situation are carried out situation analysis respectively, determine and to improve or to reduce adjustment to GR-SCH, still do not adjust.
It is as shown in table 1 that the frame mass combination situation of R-SCH, R-FCH and GR-SCH adjust mapping table.
Frame mass combination situation and the GR-SCH of table 1:R-SCH, R-FCH adjust mapping table
| Situation | R-FCH | R-SCH | Situation analysis | G R-SCHAdjust |
| A | Good frame | Good frame | Can not judge it is that R-PILOT power is too high, or power bias GR-SCH is too high. | Do not adjust |
| B | Good frame | Bad frame | The power that R-FCH is described is enough, but the power of R-SCH is not enough, can improve power bias GR-SCH. | Improve |
| C | Bad frame | Bad frame | Can not judge it is that R-PILOT power is low excessively, or power bias GR-SCH is low excessively. | Do not adjust |
| D | Bad frame | Good frame | The power that R-FCH is described is not enough, but the power of R-SCH is enough, can reduce power bias GR-SCH. | Reduce |
How many frames what the frame mass combination situation that the present invention need add up R-SCH, R-FCH in an observation window belonged to the situation A shown in the table 1, B, four kinds of situations of C, D has respectively.
The combination of the frame of R-SCH and R-FCH can also increase by 2 kinds of situations that R-SCHDTX combines with the good bad frame of R-SCH except that 4 kinds of situations shown in the table 1.
The present invention regards " misjudgement of SCH mistake frame is the DTX frame " for reducing the influence that base station erroneous judgement R-SCH frame quality causes power control as to fragmentary discontinuous DTX frame, and this DTX frame is calculated by the R-SCH bad frame.
Such as, be in the watch window of W frame a size, what R-SCH and R-FCH combination belonged to situation A has an a frame, and what belong to situation B has a b frame, and what belong to situation C has a c frame, and what belong to situation D has a d frame.
A+b+c+d=W then.
Step 5-3, calculate G according to statistical conditions
R-SCHAdjustment amount.
Suppose that R-SCH, R-FCH in the observation window have reached the FER convergence, then have following formula:
a+b+c+d＝W；
(b+c)/W=FER_SCH (error rate of R-SCH frame);
(d+c)/W=FER_FCH (error rate of R_FCH frame).
Can derive relation between rising, decline step-length according to above formula.
When observation window finished, the quantitative relation of comprehensive A, B, C, four kinds of situations of D can calculate G
R-SCHAdjustment amount.And limit this G
R-SCHAdjustment amount is between maximum and minimum value.
The present invention calculates G
R-SCHAdjustment amount can also take the variable period method to calculate except that taking the fixed cycle method.
Step 5-4, by idle message with the G that calculates
R-SCHAdjustment amount sends to travelling carriage.
Calculating G
R-SCHBehind the adjustment amount, the present invention provides independent control channel for the R-SCH closed-loop power control, and sends out idle message by this independent control channel to travelling carriage, with the G that calculates
R-SCHAdjustment amount sends travelling carriage to.
Step 5-5, travelling carriage are according to G
R-SCHAdjustment amount, the power of adjustment R-SCH.
Travelling carriage is according to the G that receives
R-SCHAdjustment amount, the power deviation G of adjustment R-SCH and R-PILOT
R-SCH, to G
R-SCHAdjustment can finish by Reverse_Channel_Adjustment_Gain (inversed business channel power composing factor), by adjusting G
R-SCHPromptly reach the purpose of adjusting R-SCH power, make the R-SCH error rate arrive target error rate.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (11)
1, a kind of closed-loop power control method of reverse complemental channel is characterized in that, comprising:
A, the frame mass combination situation of reverse complemental channel R-SCH and Reverse Fundamental Channel R-FCH is added up;
B, according to described statistics, R-SCH power is adjusted.
According to the closed-loop power control method of the described a kind of reverse complemental channel of claim 1, it is characterized in that 2, described steps A specifically comprises:
R-SCH and R-FCH are made up according to good frame and two kinds of quality situations of bad frame respectively, every kind of combined situation is carried out the frame statistics.
According to the closed-loop power control method of the described a kind of reverse complemental channel of claim 2, it is characterized in that 3, described steps A also comprises:
R-SCH and R-SCH noncontinuity emission DTX are made up according to good frame and two kinds of quality situations of bad frame respectively, every kind of combined situation is carried out the frame statistics.
According to the closed-loop power control method of the described a kind of reverse complemental channel of claim 3, it is characterized in that 4, described steps A also comprises:
Fragmentary discontinuous DTX frame is added up according to the R-SCH bad frame.
According to the closed-loop power control method of claim 1,2 or 3 described a kind of reverse complemental channels, it is characterized in that 5, described steps A specifically comprises:
A1, an observation window is set;
A2, the statistics in described observation window, the frame sum of every kind of combined situation.
According to the closed-loop power control method of the described a kind of reverse complemental channel of claim 1, it is characterized in that 6, described step B specifically comprises:
B1, according to described statistics, calculate the power deviation G between R-SCH and the Reverse Pilot Channel R-PILOT
R-SCHThe G that adjusts
R-SCHAdjustment amount;
B2, according to described G
R-SCHAdjustment amount is adjusted R-SCH power.
According to the closed-loop power control method of the described a kind of reverse complemental channel of claim 6, it is characterized in that 7, described step B1 specifically comprises:
B11, according to described statistics, calculate under every kind of combined situation G
R-SCHThe G that adjusts
R-SCHAdjustment amount;
G under B12, the basis every kind of situation that calculates
R-SCHAdjustment amount obtains final G
R-SCHAdjustment amount.
According to the closed-loop power control method of claim 6 or 7 described a kind of reverse complemental channels, it is characterized in that 8, described step B1 specifically comprises:
Calculate G
R-SCHAdjustment amount can adopt the method for fixed cycle or variable period to carry out.
According to the closed-loop power control method of the described a kind of reverse complemental channel of claim 6, it is characterized in that 9, described step B2 specifically comprises:
B21, base station send idle message to travelling carriage, with described G
R-SCHAdjustment amount sends travelling carriage to;
B22, travelling carriage are according to the described G that receives
R-SCHAdjustment amount is to G
R-SCHAdjust, R-SCH power is adjusted.
According to the closed-loop power control method of claim 6 or 9 described a kind of reverse complemental channels, it is characterized in that 10, described step B2 specifically comprises:
To G
R-SCHAdjustment can finish by inversed business channel power composing factor Reverse_Channel_Adjustment_Gain.
According to the closed-loop power control method of the described a kind of reverse complemental channel of claim 1, it is characterized in that 11, described R-SCH and R-SCH can be R-SCH and the R-SCH in the CDMA systems of using the IS2000 standard.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100773477A CN1885754A (en) | 2005-06-22 | 2005-06-22 | Closed-loop power control method for reverse supplementary channel |
| PCT/CN2006/001425 WO2006136110A1 (en) | 2005-06-22 | 2006-06-22 | A closed loop power control method of reverse supplement channel |
| CN2006800123236A CN101160743B (en) | 2005-06-22 | 2006-06-22 | Closed-loop power control method for reverse supplementary channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100773477A CN1885754A (en) | 2005-06-22 | 2005-06-22 | Closed-loop power control method for reverse supplementary channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1885754A true CN1885754A (en) | 2006-12-27 |
Family
ID=37570116
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100773477A Pending CN1885754A (en) | 2005-06-22 | 2005-06-22 | Closed-loop power control method for reverse supplementary channel |
| CN2006800123236A Expired - Fee Related CN101160743B (en) | 2005-06-22 | 2006-06-22 | Closed-loop power control method for reverse supplementary channel |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800123236A Expired - Fee Related CN101160743B (en) | 2005-06-22 | 2006-06-22 | Closed-loop power control method for reverse supplementary channel |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN1885754A (en) |
| WO (1) | WO2006136110A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100605978B1 (en) * | 1999-05-29 | 2006-07-28 | 삼성전자주식회사 | Transmission and reception apparatus and method for continuous external cyclic power control in discontinuous transmission mode of code division multiple access mobile communication system |
| CN100394706C (en) * | 2001-10-05 | 2008-06-11 | 高通股份有限公司 | Power Control Outer Loop for Communication Channels with Discontinuous Transmission |
-
2005
- 2005-06-22 CN CNA2005100773477A patent/CN1885754A/en active Pending
-
2006
- 2006-06-22 CN CN2006800123236A patent/CN101160743B/en not_active Expired - Fee Related
- 2006-06-22 WO PCT/CN2006/001425 patent/WO2006136110A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006136110A1 (en) | 2006-12-28 |
| CN101160743A (en) | 2008-04-09 |
| CN101160743B (en) | 2012-05-23 |
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