CN101442794B - Method for controlling wireless terminal emission power and wireless terminal - Google Patents
Method for controlling wireless terminal emission power and wireless terminal Download PDFInfo
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- CN101442794B CN101442794B CN2008101851212A CN200810185121A CN101442794B CN 101442794 B CN101442794 B CN 101442794B CN 2008101851212 A CN2008101851212 A CN 2008101851212A CN 200810185121 A CN200810185121 A CN 200810185121A CN 101442794 B CN101442794 B CN 101442794B
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Abstract
The invention discloses a method for controlling emission power of wireless terminal comprising: acquiring emission power sampling value of wireless terminal; selecting corresponding power detection unit according to emission power sampling value; regulating emission power based on the output of the power detection unit. The invention also provides a wireless terminal device for controlling emission power. The invention can expand detection range for emission power, promote control accuracy for output power of WCDMA wireless terminal, promotes accuracy and stability of power control of wireless terminal so as to improve network system performance of WCDMA.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of method and wireless terminal of controlling emission power of wireless terminal.
Background technology
Along with development of wireless communication devices, second generation mobile communication system (as GSM) is little by little to third generation 3G transition.The 3G of third generation system can provide the bit rate business to transmit and receive high-quality image and video, and can also insert global network with high data rate.In commercial at present 3G network, the WCDMA technology is to use one of the most ripe 3G technology.
WCDMA is a straight spreading code multiple access in broadband (DS-CDMA) system, promptly multiplies each other by user data and the pseudo-random bits that is got by the CDMA spreading code, thereby the user profile bit expanded is gone on wide bandwidth.From this view point, the WCDMA system itself is a self-interference system, and therefore power control fast and accurately is the basic demand that guarantees the WCDMA systematic function, especially in up link, if not power control accurately, the portable terminal of overpower emission will block whole sub-district.For example: two mobile terminal MSs 1 and MS2 are arranged in same sub-district, and MS1 and MS2 are operated in same frequency, and the base station only relies on both to distinguish them by spreading code separately.May occur that: MS1 is in the edge of sub-district, and MS2 is in the place near the base station, the high 80dB of space path loss ratio MS2 of MS1.If do not take certain power control mechanism to make two travelling carriages arrive the power of base station on same level, the MS2 emitted power is easy to the transmitting power greater than MS1, and then the communication of blocking most of zone, sub-district, thereby the problem of generation " near-far interference ".On the maximized meaning of whole WCDMA power system capacity, optimisation strategy be the bit power of all portable terminals that receive in the base station is equated in free.
The power control of WCDMA system comprises: open Loop Power control, closed power control and exterior ring power control.
Open Loop Power control just comes path loss is made a rough estimation with sending the downlink beacon signal, and general requirement is not too high.
Exterior ring power control be according to each independently the needs of Radio Link adjust the set point of current demand signal quality, thereby obtain a constant link-quality, exterior ring power control is general only just to be adopted when portable terminal carries out soft handover.
Closed power control is most crucial part in the control of WCDMA power.The base station will be estimated the signal quality that receives continually, and the signal quality of this signal quality and setting relatively, adjusts the transmitting power of portable terminal.
Therefore, to respond the power control instruction of base station accurately, fast be the basic demand of WCDMA network to mobile terminal device.
In the prior art, the WCDMA portable terminal adopts following power control mode, the WCDMA signal is through after the debugging of base band, in the WCDMA transmitting chip, give WCDMA power amplifier through output behind up-conversion, the pre-amplification, after in the WCDMA power amplifier, amplifying, be transmitted to the base station through giving antenna behind coupler and the duplexer, this is the main emission path of WCDMA.
The another one aspect, a coupler coupling part is from the power output of WCDMA power amplifier, through high power detector (HDET, High-power detector) detect and carry out giving Base Band Unit after mould/number (A/D) conversion, Base Band Unit carries out the power closed-loop control according to current performance number.
The inventor finds that in realizing process of the present invention in present this power control system, the scope that the WCDMA transmitting power of WCDMA power coupler coupling is delivered to baseband chip through single-stage HDET detection network is limited.The power control scheme that the adopts power control of carrying out HDET is at present only carried out the power closed-loop control of HDET at the maximum power output, and other parts all to be the single mode of passing through to table look-up obtain, the precision of power, stability all have certain deviation.
The scheme of the WCDMA power control of adopting at present exists HDET power control range limited, can't realize the control of WCDMA power with the hardware closed-loop of HDET, and the power control precision of WCDMA and stability have certain deviation.
Summary of the invention
The embodiment of the invention provides a kind of method and wireless terminal of controlling emission power of wireless terminal, can improve the scope and the precision of the power output control of WCDMA wireless terminal.
A kind of method of controlling emission power of wireless terminal that the embodiment of the invention provides comprises:
Obtain the transmitting power sampling value of wireless terminal;
Select corresponding power detecting unit according to described transmitting power sampling value;
Transmitting power is adjusted in output based on described power detecting unit.
The embodiment of the invention also provides a kind of wireless terminal device of may command transmitting power, comprising: transmitting power acquiring unit, selected cell, power control unit and at least two power detecting unit;
Described transmitting power acquiring unit is used to obtain the transmitting power sampling value of wireless terminal;
Described selected cell is selected corresponding power detecting unit according to described transmitting power sampling value;
Described power detecting unit be used for the power sampling value of described transmitting power acquiring unit is carried out power detection and quantification, and the output signal after will quantizing is exported to power control unit;
Power control unit is adjusted transmitting power based on the output signal of described power detecting unit.
Ground preferably, described wireless terminal device also comprises:
Judging unit is used to judge follow-up variable power trend, and sends control information to described selected cell;
If described judging unit is judged emission power of wireless terminal and is arrived the transmitting power sampling value range limit of current power detecting unit, and will improve transmitting power, then send control information to described selected cell, described selected cell switches to the bigger power detecting unit of detection power with current power detecting unit;
If described judging unit is judged emission power of wireless terminal and is arrived the transmitting power sampling value scope lower limit of current power detecting unit, and will reduce transmitting power, then send control information to described selected cell, described selected cell switches to the littler power detecting unit of detection power with current power detecting unit.
In sum, the embodiment of the invention provides a kind of method of controlling emission power of wireless terminal, by the power output that the multistage HDET of multistage HDET unit by using unit detects the WCDMA wireless terminal in real time is set, thresholding according to HDET carries out the HDET network selecting, adopt HDET to carry out the control of hardware closed-loop power, expand detection range for emission power, improved the precision of the power output control of WCDMA wireless terminal; Can improve the accuracy and the stability of the power control of whole wireless terminal, thereby improve the performance of WCDMA network system.
Description of drawings
Fig. 1 is the configuration diagram of wireless terminal power control subsystem in the embodiment of the invention;
Fig. 2 is the method flow diagram of control emission power of wireless terminal in the embodiment of the invention;
Power control section is divided schematic diagram in the wireless terminal that Fig. 3 provides for the embodiment of the invention.
Embodiment
In the WCDMA system, transmission power control (TPC can be passed through according to the terminal transmission signal quality that current check arrives in the base station, Transmitter Power Control) the command request terminal reduces or the lifting transmitting power, portable terminal then instructs the transmitting power of regulating portable terminal according to the TPC of base station, has realized the closed-loop control of transmitting power between base station and the terminal by the method for this power control.The WCDMA signal carries out delivering to after the up-conversion through transmitting chip in the power amplifier of WCDMA and carries out power amplification, and the WCDMA signal after the amplification enters terminal antenna through the primary path and the WCDMA duplexer of coupler, is transmitted to the base station.Can the be coupled transmitting power of a part of WCDMA of the coupling branch road of coupler feeds back to the closed-loop control that baseband chip carries out terminal transmit power., after overdamping, power detection and A/D conversion (this part is referred to as the HDET network), the power signal of WCDMA is converted to digital signal offers the accurate control that Base Band Unit carries out terminal transmit power from the power of WCDMA coupler coupling.
In order to solve the technological deficiency that scope is too narrow, precision is not high of wireless terminal power control in the present WCDMA system, the embodiment of the invention provides a kind of method of controlling emission power of wireless terminal, by the precision that multistage HDET unit improves the power output control of WCDMA is set; Utilize multistage HDET unit to detect the power output of WCDMA wireless terminal in real time, and carry out accurate power controls.
The wireless terminal power control subsystem that relates in the embodiment of the invention as shown in Figure 1, comprising:
Described transmitting power acquiring unit 130 is used to obtain the transmitting power sampling value of wireless terminal;
Described selected cell 140 is selected corresponding power detecting unit according to described transmitting power sampling value;
Described power detecting unit 150 be used for the power sampling value of described transmitting power acquiring unit is carried out power detection and quantification, and the output signal after will quantizing is exported to power control unit;
With reference to Fig. 2, a kind of method of controlling emission power of wireless terminal that the embodiment of the invention provides comprises:
Step S201 is provided with at least two different power detecting unit of transmitting power sampling value scope, switches and will offer corresponding power detecting unit in the power output sampling value of the power coupler of emission power amplifier output by electronic switch;
The upper and lower bound of all corresponding power control in HDET unit, every road, upper limit correspondence be the maximum of this road HDET network power control, the lower limit correspondence be the minimum value of this road HDET network power control.
Step S202 obtains the transmitting power sampling value of wireless terminal;
Particularly, obtain the transmitting power sampling value of wireless terminal in the present embodiment by the power coupler that is arranged on the emission power amplifier output.
Step S203 selects corresponding power detecting unit according to described transmitting power sampling value;
The performance number scope thresholding tabulation of searching predefined each power detecting unit according to current output power comes definite power detecting unit that adopts.
Particularly, according to current output power by search power detecting unit (as, HDET) tabulation of grade thresholding determines to adopt which power detecting unit (HDET network), and exports corresponding logical signal control selected cell (electronic switch) by software and select correct HDET network; Electronic switch only can select one road HDET network to be in the operating state of conducting in a definite time, and other HDET network all is in the state of disconnection.
Search the power control range that the respective value that is kept in advance in the tabulation of HDET grade threshold value is determined current HDET grade by current HDET grade.
Step S204 selects corresponding power detecting unit according to follow-up variable power trend;
Emission power of wireless terminal arrives the transmitting power sampling value range limit of current power detecting unit, and receives the instruction of the raising transmitting power of base station transmission, and current power detecting unit is switched to the bigger power detecting unit of detection power;
Emission power of wireless terminal arrives the transmitting power sampling value scope lower limit of current power detecting unit, and receives the instruction of the reduction transmitting power of base station transmission, and current power detecting unit is switched to the littler power detecting unit of detection power.
Particularly, if terminal transmit power is within the HDET network power detection range, this moment, terminal received the transmitting power control TPC instruction from the base station: improve or reduce transmitting power, Base Band Unit will determine whether to carry out the switching of HDET grade according to the tabulation of HDET grade thresholding, if do not carry out the switching of HDET grade, terminal can be switched the grade of HDET network if desired directly according to TPC instruction adjustment power output, will carry out according to the following steps:
If the current transmitting power of terminal is in the upper limit (maximum of current HDET network power control) of HDET network, and this moment, terminal received the TPC command request terminal raising power that the base station sends, Base Band Unit switches to the HDET network in the bigger HDET network of detection power according to HDET grade thresholding list controls electronic switch, satisfy the requirement of base band power detection, guarantee the accurate of power control;
If current power is in the lower limit (minimum value of current HDET network power control) of HDET network, and this moment, terminal received the TPC command request terminal reduction transmitting power that the base station sends, the base band control chip can switch to the HDET network in the littler HDET network of detection power according to HDET grade thresholding list controls electronic switch, satisfy the requirement of power detection, guarantee the accurate of power control.
Step S205 adjusts transmitting power based on the output of described power detecting unit.
In all HDET networks, power detection requirement when the lower limit of afterbody HDET network can cover the emission of 3GPP protocol requirement WCDMA terminal minimum power, the power detection requirement the when upper limit of HDET network at the highest level can cover 3GPP protocol requirement WCDMA terminal maximum power transmission;
Concrete which HDET network of selecting, base band is selected the HDET network according to the power detection scope of current output power, current HDET and the variation tendency of subsequent power.
The embodiment of the invention also provides a kind of wireless terminal device of may command transmitting power, with reference to Fig. 3, comprising: transmitter unit 310, power amplification unit 320, power coupler 330 (transmitting power acquiring unit), electronic switch 340 (selected cell), at least two HDET network element 350 (power detecting unit) and power control unit 360.
As the transmitting power acquiring unit, coupling obtains the transmitting power sampling value of wireless terminal at the power coupler of emission power amplifier output in employing in the present embodiment.
Adopt electronic switch 340 as selected cell in the present embodiment, the performance number scope thresholding tabulation of searching predefined each power detecting unit according to the power output sampling value of obtaining comes definite power detecting unit that adopts.
Present embodiment adopts HDET network 350 as power detecting unit,, be used for the power sampling value of described transmitting power acquiring unit is carried out power detection and quantification, and the output signal after will quantizing is exported to power control unit;
The different transmitting power scope of each self-supporting of described at least two power detecting unit (HDET network 350), the upper and lower bound of all corresponding power control of each HDET network element, upper limit correspondence be the maximum of this road HDET network power control, the lower limit correspondence be the minimum value of this road HDET network power control.
Usually be arranged in the Base Band Unit, be used to transmit control signal, to adjust transmitting power to transmitter unit.
Described wireless terminal device also comprises:
Judging unit 370 is used to judge follow-up variable power trend, and sends control information to described selected cell 340;
If described judging unit 370 judges that emission power of wireless terminal arrives the transmitting power sampling value range limit of current power detecting unit, and will improve transmitting power, then send control information to described selected cell (electronic switch 340), described selected cell (electronic switch 340) switches to the bigger power detecting unit of detection power with current power detecting unit;
If described judging unit 370 judges that emission power of wireless terminal arrives the transmitting power sampling value scope lower limit of current power detecting unit, and will reduce transmitting power, then send control information to described selected cell (electronic switch 340), described selected cell (electronic switch 340) switches to the littler power detecting unit of detection power with current power detecting unit.
In sum, the embodiment of the invention provides a kind of method of controlling emission power of wireless terminal, by the power output that the multistage HDET of multistage HDET unit by using unit detects the WCDMA wireless terminal in real time is set, thresholding according to HDET carries out the HDET network selecting, adopt HDET to carry out the control of hardware closed-loop power, expand detection range for emission power, improved the precision of the power output control of WCDMA wireless terminal; Can improve the accuracy of the power control of whole wireless terminal, thereby improve the performance of WCDMA network system.
Obviously, those skilled in the art should be understood that, above-mentioned each unit of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of unit in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (10)
1. a method of controlling emission power of wireless terminal is characterized in that, comprising:
Obtain the transmitting power sampling value of wireless terminal;
Detection power scope according to described transmitting power sampling value and power detecting unit is selected corresponding power detecting unit, and has only a power detecting unit to be in the conducting operating state in a definite time;
Transmitting power is adjusted in output based on described power detecting unit.
2. the method for claim 1 is characterized in that, also comprises:
Set in advance at least two different power detecting unit of transmitting power sampling value scope;
3. the method for claim 1 is characterized in that, also comprises:
Select corresponding power detecting unit according to follow-up variable power trend.
4. method as claimed in claim 3 is characterized in that, describedly selects corresponding power detecting unit according to follow-up variable power trend, comprising:
Emission power of wireless terminal arrives the transmitting power sampling value range limit of current power detecting unit, and receives the instruction of the raising transmitting power of base station transmission, and current power detecting unit is switched to the bigger power detecting unit of detection power;
Emission power of wireless terminal arrives the transmitting power sampling value scope lower limit of current power detecting unit, and receives the instruction of the reduction transmitting power of base station transmission, and current power detecting unit is switched to the littler power detecting unit of detection power.
5. the method for claim 1 is characterized in that, selects corresponding power detecting unit according to described transmitting power sampling value, comprising:
The performance number scope thresholding tabulation of searching predefined each power detecting unit according to current output power comes definite power detecting unit that adopts.
6. the wireless terminal device of a may command transmitting power is characterized in that, comprising: transmitting power acquiring unit, selected cell, power control unit and at least two power detecting unit;
Described transmitting power acquiring unit is used to obtain the transmitting power sampling value of wireless terminal;
Described selected cell is selected corresponding power detecting unit according to the detection power scope of described transmitting power sampling value and power detecting unit, and has only a power detecting unit to be in the conducting operating state in a definite time;
Described power detecting unit be used for the power sampling value of described transmitting power acquiring unit is carried out power detection and quantification, and the output signal after will quantizing is exported to power control unit;
Power control unit is adjusted transmitting power based on the output signal of described power detecting unit.
7. wireless terminal device as claimed in claim 6 is characterized in that,
The different transmitting power scope of described each self-supporting of at least two power detecting unit.
8. wireless terminal device as claimed in claim 6 is characterized in that, also comprises:
Judging unit is used to judge follow-up variable power trend, and sends control information to described selected cell;
If described judging unit is judged emission power of wireless terminal and is arrived the transmitting power sampling value range limit of current power detecting unit, and will improve transmitting power, then send control information to described selected cell, described selected cell switches to the bigger power detecting unit of detection power with current power detecting unit;
If described judging unit is judged emission power of wireless terminal and is arrived the transmitting power sampling value scope lower limit of current power detecting unit, and will reduce transmitting power, then send control information to described selected cell, described selected cell switches to the littler power detecting unit of detection power with current power detecting unit.
9. wireless terminal device as claimed in claim 6 is characterized in that,
Described transmitting power acquiring unit is the power coupler that is arranged on the emission power amplifier output.
10. wireless terminal device as claimed in claim 6 is characterized in that,
Described selected cell is an electronic switch, is arranged between described transmitting power acquiring unit and described at least two power detecting unit, according to described transmitting power sampling value described transmitting power acquiring unit is switched to corresponding power detecting unit.
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| CN2008101851212A CN101442794B (en) | 2008-12-09 | 2008-12-09 | Method for controlling wireless terminal emission power and wireless terminal |
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| CN2008101851212A CN101442794B (en) | 2008-12-09 | 2008-12-09 | Method for controlling wireless terminal emission power and wireless terminal |
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| CN101442794A CN101442794A (en) | 2009-05-27 |
| CN101442794B true CN101442794B (en) | 2010-12-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101938822B (en) * | 2009-07-02 | 2013-07-03 | 中兴通讯股份有限公司 | Reverse power control method and reverse power control device |
| CN102316558A (en) * | 2010-06-30 | 2012-01-11 | 中兴通讯股份有限公司 | Method and device for realizing wireless base station power supply management and control |
| US8975961B2 (en) * | 2013-05-24 | 2015-03-10 | Texas Instruments Incorporated | Power amplifier control circuits |
| CN106100675B (en) * | 2016-05-23 | 2019-08-13 | Oppo广东移动通信有限公司 | A kind of radio frequency front-end device, antenna assembly and mobile terminal |
| CN105916194A (en) * | 2016-05-26 | 2016-08-31 | 努比亚技术有限公司 | Radio-frequency signal transmitting method, radio-frequency signal transmitting device and terminal |
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