CN101711056B - Method and system for controlling base station power - Google Patents

Method and system for controlling base station power Download PDF

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Publication number
CN101711056B
CN101711056B CN2009101096458A CN200910109645A CN101711056B CN 101711056 B CN101711056 B CN 101711056B CN 2009101096458 A CN2009101096458 A CN 2009101096458A CN 200910109645 A CN200910109645 A CN 200910109645A CN 101711056 B CN101711056 B CN 101711056B
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power
voltage
base station
logarithmic
performance number
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CN101711056A (en
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朱贞颖
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a method and system for controlling base station power, aiming to keep base station power stable. The method takes equipment delivery state as the standard state and collects the voltage and corresponding power value of at least two groups of base stations at the standard state; and the collected voltage and the corresponding power value are used to calculate and simulate coefficients A and B in a logarithmic equation P=A*log10V+B so as to form a logarithmic curve representing power voltage relation, and the coefficients A and B and the power value are stored in the EEPROM of the system; after the voltage V of the base station is collected, the logarithmic equation P=A*log10V+B is used for calculating the power value P corresponding to the voltage V; and according to the deviation condition of the power value P and a prestored power, power regulation is started. The method and the system of the invention can use sectionalized logarithmic curves to accurately calculate power, the calculation error is small, so that the method and the system of the invention can effectively control base station power and keep the system stable.

Description

A kind of control method of base station power and system
Technical field
The present invention relates to the power control in the network base station, relate in particular to a kind of method and system through the control of chip microcontroller base station power.
Background technology
Power control is very important module in the network base station, and it is directly connected to the stable and maintainable of whole base station.Unusual when the power appearance of network base station, the too high or too low system that all can cause is unstable like power, influences the normal operation of network base station, therefore need take measures the power of network base station is controlled.
A difficult point of power control is a precision problem, and the general at present fundamental formular that adopts producer to provide is come rated output, yet the precision of computing is often poor.This is because after the power amplifier board design is accomplished; The hardware circuit property of there are differences; And there is error in components and parts like group container piece parameter, amplifier amplification coefficient etc., cause system unstable thereby these factors are superimposed on the fundamental formular that will cause operation result to depart from producer together providing.Therefore need a kind of method to be used for the power of network base station is control effectively, and set up the cover system of power controlling at short notice.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of control method and system of base station power, the accurate Calculation base station power, and it is stable with guaranteed output to regulate base station power.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of control method of base station power is standard state when dispatching from the factory with equipment, gathers the voltage and the corresponding performance number P thereof of standard state at least two group base stations 0, utilize the voltage and the corresponding performance number thereof of being gathered to calculate simulation logarithmic equation P=A * log 10Coefficient A and B among the V+B form the logarithmic curve that characterizes the power voltage relation, said coefficient A and B and performance number P thus 0Be saved among the EEPROM of system; Said control method may further comprise the steps:
I, system start-up are also accomplished hardware initialization;
The voltage V of ii, system acquisition base station;
Iii, system transfer coefficient A and the B that is pre-stored in EEPROM, utilize logarithmic equation P=A * log 10V+B calculates the pairing performance number P of said voltage V;
If the said performance number P of iv departs from the performance number P that is pre-stored in EEPROM 0, system regulates base station power and makes it as far as possible near said performance number P 0
V, make system be in monitored state to step I v with the time interval repeating said steps ii that sets.
In said step I v, when said power P greater than the power P that prestores 0The time, system increases the circuit decay through opening decay control I/O; When said power P less than the power P that prestores 0The time, system reduces the circuit decay through opening decay control I/O.
Said method also comprises the steps: when abnormality appears in system, to close two-way BIAS, and the information that gives a warning also waits for that reflection power is normal.Said abnormality refers to that temperature is too high or reflection power is excessive.
The control method of described base station power also comprises following technical characterictic:
Between the minimum and maximum power of system, gather the base station voltage of five sampled points and the performance number of correspondence thereof with the appropriate voltage step pitch; Obtain the voltage and the performance number of five groups of sampled points thus, utilize the base station voltage of two adjacent groups sampled point and corresponding performance number thereof to obtain one group of simulation logarithmic equation P=A * log 10Coefficient A and B among the V+B obtain four groups of coefficient A and B and four sections power voltage logarithmic curves thus, and joining end to end four sections power voltage logarithmic curves in order forms a logarithmic curve that the sign power voltage relation of degree of precision is arranged.
The voltage step that adopts equidistance not is apart from the voltage and the performance number of gathering sampled point, in the big part of measure error, and with less voltage step distance, in the little place of measure error, the voltage step distance that usefulness is bigger.
The present invention also adopts following technical scheme:
A kind of control system of base station power is used to make the power of base station to keep stable, and said system comprises:
Single-chip microcomputer is used for according to logarithmic equation P=A * log 10V+B comes voltage and the corresponding power thereof that simulation process gathers, and sends the control command of the attenuation rate of regulating circuit according to the deviation of the power of real-time calculating and preset standard power;
EEPROM is used for the logarithmic equation P=A * log of storage standards state 10Coefficient A among the V+B and B and pairing voltage and power;
Decay control I/O unit is used for the attenuation rate that the deviation value according to base station power and preset standard power comes control circuit, makes the power of base station keep stablizing;
The AD7265 unit connects the voltage sample end, is used to read the real-time voltage value of base station;
Said single-chip microcomputer is connected with said EEPROM is two-way, and the signal input and output side of said single-chip microcomputer connects said AD7265 unit and decay control I/O unit respectively.
Said system also comprises: with the two-way serial ports UART module that is connected of said single-chip microcomputer, be used for communicating with PC or host computer; And with the two-way AD8802 unit that is connected of said single-chip microcomputer, be used for when abnormality appears in system, closing two-way BIAS, the information that gives a warning also waits for that reflection power is normal.
Compared with prior art, useful technique effect of the present invention is: through the power of logarithmic curve analog computation base station, only need gather a spot of data volume and just can utilize the logarithmic curve rated output; When utilizing the logarithmic curve rated output of segmentation, the error of calculation even can be reduced to 2% is calculated accurately highly, can effectively control base station power and guarantee system stability.
Description of drawings
Fig. 1 is the block diagram of the control system of a kind of base station power of providing of the embodiment of the invention;
Fig. 2 is the flow chart of the control method of a kind of base station power of providing of the embodiment of the invention;
Fig. 3 logarithmic curve-fitting power that to be the present invention obtain through two groups of sampled points and the comparative graph of measured power;
Fig. 4 is that logarithmic curve that the present invention obtains through two groups of sampled points is when being used for rated output and the error curve diagram of measured power value;
Fig. 5 is the output voltage and the performance number of five groups of collection points providing of the embodiment of the invention;
Fig. 6 is the coefficient value that collection point of the present invention output voltage and performance number obtain when being used to ask the logarithmic curve coefficient;
Fig. 7 is that four sections logarithmic curves that the present invention obtains through five groups of sampled points are when being used for rated output and the error curve diagram of measured power value;
Fig. 8 is that the method that the embodiment of the invention provides is carried out the flow chart that the circuit decay is regulated to real-time voltage.
Embodiment
Below in conjunction with accompanying drawing and most preferred embodiment, the present invention is explained further details.
The present invention utilizes the logarithmic equation P=A * log that characterizes the power voltage relation 10V+B comes the power of analog computing device such as base station.Voltage when just having produced through collection at least two group equipment and corresponding power thereof utilize logarithmic curve equation P=A * log 10V+B calculates coefficient A and B, forms the logarithmic curve equation, as the foundation of base station power calculating.If further improve the precision of calculating, can gather five groups of voltages and corresponding power thereof, calculate five groups of coefficient A and B, form the logarithmic curve equation of segmentation, be used to calculate the pairing power of real-time voltage under each different segmentation voltages.For the ease of understanding the control method of base station power of the present invention, at first system of the present invention is described.
Fig. 1 shows the block diagram of the control system of base station power of the present invention.As shown in Figure 1, system according to the invention comprises single-chip microcomputer 1, EEPROM2, decay control I/O unit 3, AD7265 unit 4.Said single-chip microcomputer is connected with said EEPROM2 is two-way, and the signal input and output side of said single-chip microcomputer connects said AD7265 unit 4 and decay control I/O unit 3 respectively.
Said single-chip microcomputer 1 is used for according to logarithmic equation P=A * log 10V+B comes voltage and the corresponding power thereof that simulation process gathers, and sends the control command of the attenuation rate of regulating circuit according to the deviation of the power of real-time calculating and preset standard power.Said single-chip microcomputer 1 is 16 single-chip microcomputers of auspicious Sa science and technology M16 series, this single-chip microcomputer 1 band PLL function, and cpu clock can frequency multiplication arrive 21Mhz, can significantly improve the responding ability of whole system; Through measurement, about 4.5ms of system feedback optimal response time, feedback adjustment normal condition maximum duration needs 50ms approximately.This single-chip microcomputer 1 has the memory headroom of 1M byte in addition, and counting when collection need not extend out ram when increasing, and has reduced cost of hardware design.
Said EEPROM2 is used for the logarithmic equation P=A * log of storage standards state 10Coefficient A among the V+B and B and pairing voltage and power.Through with 1 two-way connection of single-chip microcomputer, said EEPROM2 can make single-chip microcomputer 1 utilize the corresponding power of logarithmic equation calculating real-time voltage with coefficient A and B and data load such as pairing voltage and power in the internal memory of single-chip microcomputer 1.
Said decay control I/O unit 3 is used for the attenuation rate that the deviation value according to base station power and preset standard power comes control circuit, makes the power of base station keep stablizing;
Said AD7265 unit 4 connects the voltage sample end, is used to read the real-time voltage value of base station.Said AD7265 unit is 12bit, if the reference voltage of AD be 5V then error be (1/212) * 5 ≈ 1mv, therefore can tell the voltage fluctuation of 0.001V, improved control accuracy.
System according to the invention also comprises and the two-way serial ports UART module 6 that is connected of said single-chip microcomputer, is used for communicating with PC or host computer; And with the two-way AD8802 unit 5 that is connected of said single-chip microcomputer, be used for when abnormality appears in system, closing two-way BIAS, the information that gives a warning also waits for that reflection power is normal.
Fig. 2 shows the control method flow process based on base station power of the present invention.For the ease of describing, only show the part relevant here with the present invention.
In step S201, when just having dispatched from the factory standard state with equipment, gather the voltage and the corresponding performance number thereof of standard state at least two group base stations.
In step S202, voltage that the single-chip microcomputer utilization is gathered and corresponding performance number thereof are calculated simulation logarithmic equation P=A * log 10Coefficient A and B among the V+B form the logarithmic curve that characterizes the power voltage relation thus, and said coefficient A and B are saved among the EEPROM of system.
The present invention is through logarithmic curve P=A * log 10The variation of V+B simulated power, P and V are respectively power and the voltage under a certain state, A and B are the coefficients of logarithmic curve.When equipment has just been produced, current power does not depart from normal power basically, has confirmed the coefficient A and the B of next group logarithmic curve of standard state, just can utilize the power of the interior equipment of a period of time that the curvilinear equation computing equipment just produced.Therefore as long as in step S201, gather two groups of data; Like maximum power and corresponding voltage value, minimum power and corresponding voltage value thereof; The coefficient A and the B of logarithmic curve just can settle the standard; Then coefficient is saved among the EEPROM, thereby when system start-up, just can calls the power that the logarithmic curve equation is used for computing equipment.
In step S203, system start-up is also accomplished the hardware initialization operation.
In step S204, the voltage V of system acquisition base station.After collecting voltage V, system transfers coefficient A and the B that is pre-stored in EEPROM, utilizes logarithmic equation P=A * log 10V+B calculates the pairing performance number P of said voltage V.
Owing in step S202, calculated the coefficient A and the B of logarithmic equation,, just can utilize logarithmic equation P=A * log after collecting voltage V as long as read this two coefficients 10V+B calculates current performance number P.System's situation of performance number that prestores may appear departing from because of ageing equipment or other factors of instability in said current power P, thus need power P be regulated, stable to keep system power.
In step S205, if said performance number P departs from the performance number that is pre-stored in EEPROM, system regulates base station power and makes it as far as possible near said performance number.When said power P during greater than the power that prestores, system increases the circuit decay through opening decay control I/O; When said power P during less than the power that prestores, system reduces the circuit decay through opening decay control I/O.
In step S206, make system be in monitored state to step S205 with the time interval repeating said steps S203 that sets.
Aforesaid method is utilized a logarithmic equation P=A * log 10V+B can realize that analog computation goes out the power of equipment, and through decay control I/O unit scalable power, makes system keep power stability.After equipment has used a period of time, only utilize a logarithmic equation to come the rated output time error to increase.
The error condition that Fig. 3 and Fig. 4 show equipment when using the logarithmic curve of being obtained by two groups of sampled points after a period of time to be used for rated output; Can be found out by Fig. 3 or Fig. 4, be that error is 0 among corresponding 2 of maximum power and minimum power at the two ends of curve; But at the mid portion of curve, the worst error of measured power and matched curve rated output reaches 15%.
Therefore as another embodiment of the present invention, the method that the further proposition of the present invention comes computing equipment power through the segmentation logarithmic curve is to improve computational accuracy.Preface step I before the said method) is: between the minimum and maximum power of system, gather the base station voltage of five sampled points and the performance number of correspondence thereof with the appropriate voltage step pitch; Obtain the voltage and the performance number of five groups of sampled points thus, utilize the base station voltage of two adjacent groups sampled point and corresponding performance number thereof to obtain one group of simulation logarithmic equation P=A * log 10Coefficient A and B among the V+B obtain four groups of coefficient A and B and four sections power voltage logarithmic curves thus, and joining end to end four sections power voltage logarithmic curves in order forms a logarithmic curve that the sign power voltage relation of degree of precision is arranged.
The logarithmic curve of different segmentations is used to calculate the pairing power of voltage of different segmentations.The pairing power of certain real-time voltage in one section voltage range must calculate through the corresponding logarithmic curve of this section voltage.And the selection of sampled point can be carried out according to the characteristics of logarithmic curve, samples with unequal step pitch, and the big part of measure error is with less voltage step distance, and the little place of measure error is with bigger step pitch.
Shown in Fig. 5 is the five groups of voltages and the corresponding performance number thereof of being gathered with asynchronous distance.Calibration point 1 and the voltage of calibration point 2 and the performance number of correspondence thereof as according to Fig. 5 can obtain one group of simulation logarithmic equation P=A * log 10Coefficient A and B among the V+B; Be about to the input voltage V1=0.619 of calibration point 1, the input voltage V2=0.205 of input power P1=-10.0 and calibration point 2, input power P2=-7.0 is substitution equation P=A * log respectively 10V+B can calculate one group of coefficient value A and B, and the curvilinear equation that this group coefficient value is corresponding can be used for the calculating voltage scope between 0.205 to 0.619 volt of pairing power.In like manner, according to calibration point 2 and calibration point 3, calibration point 3 and calibration point 4, calibration point 4 can both solve one group of coefficient value respectively with calibration point 5, so can form the coefficient value of 4 groups of logarithmic curves as shown in Figure 6.
Utilize the subsequent step of the logarithmic curve rated output of segmentation ii) to comprise aforesaid step S203 to step S205, as shown in Figure 8, promptly the voltage V of system acquisition base station transfers the coefficient A and the B that are pre-stored in EEPROM, utilizes logarithmic equation P=A * log 10V+B calculates the pairing performance number P of said voltage V, thereby starting power is regulated: when said power P during greater than the power that prestores, increase the circuit decay; When said power P during, reduce the circuit decay less than the power that prestores.Error condition when Fig. 7 shows four sections logarithmic curves being obtained by five groups of sampled points and is used for rated output; This moment, logarithmic curve-fitting power overlapped with the curve of measured power basically; The power of obtaining through four sections logarithmic curves and the error of measured power are no more than 2%, and said four sections logarithmic curves can be used for the corresponding power of calculating real-time voltage.
In step S207,, abnormality closes two-way BIAS when appearring in system, and the information that gives a warning also waits for that reflection power is normal.The abnormality of system comprises that temperature is too high, reflection power is excessive, close two-way BIAS when spending above 85 like temperature, to play the effect of protection base station.
In sum, the present invention only need gather two groups of voltages and corresponding power thereof through the corresponding power of logarithmic curve analog computation real-time voltage when equipment is just produced, utilize a logarithmic curve just can calculate the power of equipment; According to requirement to error limitation, when needing further to improve precision, can gather five groups of voltages and performance number, form four sections logarithmic curves to calculate power corresponding under the different segmentation voltage ranges.The present invention only need gather a spot of data volume, just can accurate Calculation power, and utilize the segmentation logarithmic curve to calculate time error even can reduce in 2%, greatly improved computational accuracy, achieve effective control base station power guaranteed output is stable.

Claims (9)

1. the control method of a base station power is intended to make the power of base station to keep stable, it is characterized in that: be standard state when dispatching from the factory with equipment, gather the voltage and the corresponding performance number P thereof of at least two group base stations under the standard state 0, utilize the voltage and the corresponding performance number thereof of being gathered to calculate simulation logarithmic equation P=A * log 10Coefficient A and B among the V+B form the logarithmic curve that characterizes power and voltage relationship, said coefficient A and B and performance number P thus 0Be saved among the EEPROM of system; Said control method may further comprise the steps:
I, system start-up are also accomplished hardware initialization;
The voltage V of ii, system acquisition base station;
Iii, system transfer coefficient A and the B that is pre-stored in EEPROM, utilize logarithmic equation P=A * log 10V+B calculates the pairing performance number P of said voltage V;
If the said performance number P of iv departs from the performance number P that is pre-stored in EEPROM 0, system regulates base station power and makes it as far as possible near said performance number P 0
V, make system be in monitored state to step I v with the time interval repeating said steps ii that sets.
2. the control method of base station power according to claim 1 is characterized in that: in said step I v, when said power P greater than the power P that prestores 0The time, system increases the circuit decay through opening decay control I/O; When said power P less than the power P that prestores 0The time, system reduces the circuit decay through opening decay control I/O.
3. the control method of base station power according to claim 2, it is characterized in that: said method also comprises the steps: when abnormality appears in system, to close two-way BIAS, and the information that gives a warning also waits for that reflection power is normal.
4. according to the control method of the described base station power of the arbitrary claim of claim 1 to 3; It is characterized in that: between the minimum and maximum power of system, gather the base station voltage of five sampled points and the performance number of correspondence thereof with the appropriate voltage step pitch; Obtain the voltage and the performance number of five groups of sampled points thus, utilize the base station voltage of two adjacent groups sampled point and corresponding performance number thereof to obtain one group of simulation logarithmic equation P=A * log 10Coefficient A and B among the V+B obtain four groups of coefficient A and B and four sections power voltage logarithmic curves thus, and joining end to end four sections power voltage logarithmic curves in order forms a logarithmic curve that the sign power voltage relation of degree of precision is arranged.
5. the control method of base station power according to claim 4; It is characterized in that: the voltage step that adopts equidistance not is apart from the voltage and the performance number of gathering sampled point, in the big part of measure error, with less voltage step distance; In the little part of measure error, with bigger voltage step distance.
6. the control method of base station power according to claim 3, it is characterized in that: said abnormality refers to that temperature is too high or reflection power is excessive.
7. the control system of a base station power is used to make the power of base station to keep stable, it is characterized in that comprising:
Single-chip microcomputer (1) is used for according to logarithmic equation P=A * log 10V+B comes voltage and the corresponding power thereof that simulation process gathers, and sends the control command of the attenuation rate of regulating circuit according to the deviation of the power of real-time calculating and preset standard power;
EEPROM (2) is used for the logarithmic equation P=A * log of storage standards state 10Coefficient A among the V+B and B and pairing voltage and power;
Decay control I/O unit (3) is used for the attenuation rate that the deviation value according to base station power and preset standard power comes control circuit, makes the power of base station keep stablizing;
AD7265 unit (4) connects the voltage sample end, is used to read the real-time voltage value of base station;
Said single-chip microcomputer (1) and two-way connection of said EEPROM (2), the signal input and output side of said single-chip microcomputer (1) connect said AD7265 unit (4) and decay control I/O unit (3) respectively.
8. base station power control system according to claim 7 is characterized in that also comprising: with the two-way serial ports UART module (6) that is connected of said single-chip microcomputer (1), be used for communicating with PC or host computer.
9. base station power control system according to claim 8; It is characterized in that also comprising: with the two-way AD8802 unit (5) that is connected of said single-chip microcomputer (1); Be used for when abnormality appears in system, closing two-way BIAS, the information that gives a warning also waits for that reflection power is normal.
CN2009101096458A 2009-11-12 2009-11-12 Method and system for controlling base station power Expired - Fee Related CN101711056B (en)

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CN2009101096458A CN101711056B (en) 2009-11-12 2009-11-12 Method and system for controlling base station power

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Application Number Priority Date Filing Date Title
CN2009101096458A CN101711056B (en) 2009-11-12 2009-11-12 Method and system for controlling base station power

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CN101711056B true CN101711056B (en) 2012-07-18

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1146669A (en) * 1995-04-27 1997-04-02 索尼公司 Power control circuit or transmission equipment
CN1355967A (en) * 1999-06-14 2002-06-26 高通股份有限公司 Adjusting maximum transmit power to maintain constant margin for adjacement channel power

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1146669A (en) * 1995-04-27 1997-04-02 索尼公司 Power control circuit or transmission equipment
CN1355967A (en) * 1999-06-14 2002-06-26 高通股份有限公司 Adjusting maximum transmit power to maintain constant margin for adjacement channel power

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