CN105451318A - Transmitting power control system and method and mobile terminal - Google Patents
Transmitting power control system and method and mobile terminal Download PDFInfo
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- CN105451318A CN105451318A CN201410375214.7A CN201410375214A CN105451318A CN 105451318 A CN105451318 A CN 105451318A CN 201410375214 A CN201410375214 A CN 201410375214A CN 105451318 A CN105451318 A CN 105451318A
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Abstract
The invention discloses a transmitting power control system and method and a mobile terminal, and belongs to the technical field of communication power control. The system comprises a reception unit, a computation unit connected with the reception unit, a first judgment unit connected with the computation unit and provided with a judgment threshold value in advance, a second judgment unit connected with the first judgment unit, and a power control unit connected with the second judgment unit. The method comprises the following steps: obtaining sending signals of a base station; carrying out calculation based on the signals to obtain signal-to-interference ratios of corresponding power control groups; comparing the signal-to-interference ratios with the judgment threshold value, and setting values of power control symbols of the power control groups, of which the signal-to-interference ratios are smaller than or equal to the judgment threshold value, to be preset values; judging the values of all power control symbols and outputting corresponding power control instructions; and controlling transmitting power of the mobile terminal. The beneficial effects of the technical scheme are that the method prevents inaccurate TPC symbols from influencing TPC judgment result, and thus communication quality is not influenced.
Description
Technical field
The present invention relates to power of communications control technology field, particularly relate to a kind of emissive power control system and method and mobile terminal.
Background technology
For 3GPP (The3
rdgenerationPartnershipProject, third generation partner program) under communication system, especially WCDMA mobile communication system (WidebandCodeDivisionMultipleAccess, WCDMA), it is a kind of self-interference communication system, namely the signal sent away from the mobile terminal of base station can due to transmitted power more weak and the signal that sends by the mobile terminal near base station " flood ", thus cause the situation that the different mobile terminal in same base station range disturbs mutually.In order to avoid the generation of this phenomenon, in a wcdma system, need to carry out transmitting power control (TransmitPowerControl to the transmitting power of each mobile terminal, TPC), to control the transmitting power of each mobile terminal, the transmitting power of each mobile terminal is unlikely to too small (so that base station can receive signal), is also unlikely to excessive (to avoid the interference to other mobile terminals in same base station range).In other words, the effect that TPC controls is the transmitting power of mobile terminal to be controlled to send on the as far as possible little power of signal to base station smoothly.
In prior art, for the signal of different capacity control group, the signal of mobile terminal itself merges and may occur deviation, thus causes the TPC instruction after merging to make mistakes, and the wireless link of corresponding mobile terminal is gone offline, affects communication quality.
Summary of the invention
According to problems of the prior art, now provide a kind of and be intended to improve TPC and adjudicate the emissive power control system of accuracy rate and method and mobile terminal, specifically comprise:
A kind of emissive power control system, is applicable to mobile terminal; Wherein, comprising:
Receiving element, for receiving the transmission signal of base station;
Computing unit, connects described receiving element, for the signal interference ratio according to the corresponding power control group of the calculated signals received;
First decision unit, connect described computing unit, a judging threshold is preset with in described first decision unit, for the signal interference ratio of described power control group and described judging threshold being compared, and value judgement signal interference ratio being less than or equal to the power control symbols of the power control group of described judging threshold is a preset value;
Second decision unit, connects described first decision unit and described receiving element, exports corresponding power control instruction according to the value of the power control symbols received;
Power control unit, connects described second decision unit, for adjusting the transmitting power of described mobile terminal according to described power control instruction.
Preferably, this emissive power control system, wherein, described computing unit calculates signal energy value and the interference energy value of corresponding described power control group according to the power control symbols of the common pilot channel of each community, the pilot tone of dedicated channel and dedicated channel, and and then calculates the signal interference ratio of corresponding described power control group.
Preferably, this emissive power control system, wherein, described second decision unit exports the described power control instruction turning down transmitting power accordingly when there being the value indicated horsepower of a described power control symbols to decline, and exports when the value indicated horsepower without any described power control symbols declines the described power control instruction heightening transmitting power accordingly.
A kind of transmit power controlling method, is applicable in mobile terminal, wherein, comprises:
Step S1, obtains the transmission signal of base station;
Step S2, obtains the signal interference ratio of corresponding power control group according to described calculated signals;
Step S3, compares described signal interference ratio and the judging threshold preset, and the power control symbols of the described power control group corresponding to the described signal interference ratio being less than or equal to described judging threshold is set as a preset value;
Step S4, adjudicates the value of all described power control symbols, and exports corresponding power control instruction according to court verdict;
Step S5, controls the transmitting power of described mobile terminal according to described power control instruction.
Preferably, this transmit power controlling method, wherein, in described step S2, calculate signal energy value and the interference energy value of corresponding described power control group according to the power control symbols of the Common Pilot Channel of each community, the pilot tone of dedicated channel and dedicated channel, and and then calculate the signal interference ratio of corresponding power control group.
Preferably, this transmit power controlling method, wherein, described step S3 specifically comprises:
Step S31, compares described signal interference ratio and the judging threshold preset:
If described signal interference ratio is greater than described judging threshold, then directly go to described step S4;
Step S32, is set as a preset value by described power control symbols corresponding for described signal interference ratio, goes to described step S4 subsequently.
Preferably, this transmit power controlling method, wherein, described step S4 specifically comprises:
Step S41, obtains all described power control symbols;
Step S42, adjudicates the value of all described power control symbols, and exports corresponding power control instruction according to court verdict:
If the value indicated horsepower having described power control symbols declines, then the instruction of transmitting power is turned down in corresponding output;
If the value indicated horsepower that there is not any described power control symbols declines, then the instruction of transmitting power is heightened in corresponding output.
A kind of mobile terminal, wherein, comprises above-mentioned emissive power control system.
A kind of mobile terminal, wherein, adopts above-mentioned transmit power controlling method.
The beneficial effect of technique scheme is: by first judging that the mode of sir value avoids not accurate enough TPC symbols influence TPC court verdict before TPC judgement, thus affect communication quality.
Accompanying drawing explanation
Fig. 1 is in preferred embodiment of the present invention, a kind of structural representation of emissive power control system;
Fig. 2-4 is in preferred embodiment of the present invention, the schematic flow sheet of transmit power controlling method.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, all belongs to the scope of protection of the invention.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as limiting to the invention.
In prior art, when mobile terminal is in soft switching process, it is kept in touch with multiple base station all the time, different base station can send different power control instructions and arrive mobile terminal, and the power control instruction between different base station may be contradictory, such as certain base station requests increases power, and another base station requests reduces power.In this case, mobile terminal can merge by the power control signal different to these, when the principle merged is the value of the power control group of dedicated channel when all respective base station equal indicated horsepower rising (being namely UP), terminal promotes its up transmitting power; When wherein there being value indicated horsepower decline (i.e. DOWN) of power control group of a dedicated channel, terminal turns down up transmitting power.
But different base station is when transmission TPC, and its signal interference ratio (SIR) sending signal can be different.When the sir value of the power control group having base station corresponding is lower, the accuracy of the corresponding TPC that mobile terminal receives just cannot be guaranteed, and the TPC that accuracy cannot ensure probably causes the adjustment of the uplink transmission power of mobile terminal to be made mistakes, namely may be risen from expectation originally and become decline, thus affect the communication quality of mobile terminal.
In preferred embodiment of the present invention, as shown in Figure 1, a kind of emissive power control system is provided, it is applicable in mobile terminal, and the WCDMA communication system be applicable under such as 3GPP communication standard, or the CDMA2000 communication system etc. under 3GPP2 communication standard needs to carry out in the self-interference system of power control.
This emissive power control system specifically comprises:
Receiving element 1, for receiving the transmission signal of base station.
Computing unit 2, connects above-mentioned receiving element 1, obtains above-mentioned signal, measures and calculates the signal interference ratio of signal.In preferred embodiment of the present invention, computing unit 2 obtains signal energy value S and the interference energy value I of signal, to calculate signal interference ratio (SIR).
Further, in preferred embodiment of the present invention, computing unit 2 obtains corresponding power control group (PowerControlGroup according to the power control symbols (TPC symbol) in the Common Pilot Channel of each community, the pilot tone of dedicated channel and dedicated channel, PCG) signal energy value S and interference energy value I, and then obtain should the sir value of power control group.
First decision unit 3, connects above-mentioned computing unit 2.In preferred embodiment of the present invention, after computing unit 2 calculates the sir value of each PCG, this sir value and the judging threshold defaulted in the first decision unit 3 are compared.
Further, in preferred embodiment of the present invention, when the sir value of a PCG is less than or equal to above-mentioned judging threshold, the value of the TPC symbol of this PCG is set to a preset value, exports this TPC symbol subsequently;
In preferred embodiment of the present invention, value signal interference ratio being less than or equal to the TPC symbol of judging threshold is set to UP, and namely indicated horsepower rises.
Second decision unit 4, connects above-mentioned first decision unit 3, for adjudicating the value of all TPC symbols, and exports corresponding power control instruction according to court verdict.
Further, in preferred embodiment of the present invention, when the value of all TPC symbols is indicated horsepower rising (i.e. UP), the instruction of transmitting power is heightened in corresponding output;
And when wherein there being the value of at least one TPC symbol to be indicated horsepower decline (i.e. DOWN), the instruction of transmitting power is turned down in corresponding output.
In preferred embodiment of the present invention, above-mentioned judgement also merges TPC thus the process forming corresponding power control instruction meets the regulation of WCDMA communication protocol, realizes the merging of TPC decision value according to the regulation of WCDMA communication protocol.
Power control unit 5, connects above-mentioned second decision unit 4, for according to above-mentioned power control instruction, and the transmitting power of corresponding control mobile terminal.
In preferred embodiment of the present invention, provide a kind of transmit power controlling method, above-mentioned emissive power control system can be adopted, be applicable to mobile terminal, and be applicable in the self-interference system of required power control of such as WCDMA system.
In preferred embodiment of the present invention, above-mentioned transmit power controlling method as shown in Figure 2, specifically comprises:
Step S1, obtains the transmission signal of base station;
Step S2, obtains the signal interference ratio of corresponding power control group according to calculated signals;
In preferred embodiment of the present invention, obtain signal energy value S and the interference energy value I of corresponding PCG according to the pilot tone of Common Pilot Channel, dedicated channel and the TPC symbol of dedicated channel, thus obtain the sir value of this PCG.
Step S3, compares signal interference ratio and the judging threshold preset, and the power control symbols of the power control group of the dedicated channel corresponding to the signal interference ratio being less than or equal to judging threshold is set as a preset value;
In preferred embodiment of the present invention, when judgement sir value is less than default judging threshold, TPC symbol corresponding for this sir value is set as a preset value, and exports this TPC symbol.Further, in preferred embodiment of the present invention, the value of TPC symbol is set to UP, namely indicated horsepower rises.
Step S4, adjudicates the value of all power control symbols, and exports corresponding power control instruction according to court verdict;
In preferred embodiment of the present invention, above-mentioned steps S4 adjudicates the value of all TPC symbols, merges, the value of all TPC symbols to export corresponding power control instruction subsequently.
Step S5, controls the transmitting power of mobile terminal according to power control instruction.
In preferred embodiment of the present invention, control mobile terminal according to power control instruction and heighten or turn down transmitting power.
Further, in preferred embodiment of the present invention, above-mentioned steps S3 as shown in Figure 3, specifically comprises:
Step S31, compares signal interference ratio and the judging threshold preset:
If signal interference ratio is greater than judging threshold, then directly go to step S4;
Step S32, is set as a preset value by power control symbols corresponding for signal interference ratio, goes to step S4 subsequently.
In preferred embodiment of the present invention, when signal interference ratio is less than or equal to judging threshold, illustrate that corresponding signal strength signal intensity is poor, this TPC symbol is insincere, therefore this TPC symbol is set as UP, namely indicated horsepower rises, and subsequently the TPC symbol with preset value is added TPC judgement and merging process, to be removed the impact of merging process afterwards by this TPC symbol;
In preferred embodiment of the present invention, when signal interference ratio is greater than above-mentioned judging threshold, illustrate that corresponding signal strength signal intensity is better, corresponding TPC symbol is credible, now directly export this TPC symbol, in TPC after this TPC symbol can directly add judgement and the process that merges.
Further, in preferred embodiment of the present invention, above-mentioned steps S4 as shown in Figure 4, specifically comprises:
Step S41, obtains all power control symbols;
In preferred embodiment of the present invention, obtain all TPC symbols.
Step S42, adjudicates the value of all power control symbols;
Step S43, exports corresponding power control instruction according to court verdict:
If the value indicated horsepower having power control symbols declines, then the instruction of transmitting power is turned down in corresponding output;
If the value indicated horsepower that there is not any power control symbols declines, then the instruction of transmitting power is heightened in corresponding output.
In preferred embodiment of the present invention, the principle of merging is: if there is instruction DOWN in TPC symbol, just turn down transmitting power; If all TPC symbols all indicate UP, then heighten transmitting power.
In sum, the object of the invention is to: before TPC symbol is adjudicated, first a judging threshold preset whether is less than or equal to according to the sir value of the corresponding PCG of the TPC symbol decision of the Common Pilot Channel of each community and the pilot tone of dedicated channel and dedicated channel: if be greater than this judging threshold, then illustrate that the TPC symbol of this PCG is relatively more accurate, can be directly used in and carry out follow-up merging process; If be less than or equal to this judging threshold, then illustrate that the signal strength signal intensity of this PCG is poor, its TPC symbol may be inaccurate, be unsuitable for directly carrying out follow-up merging process, the TPC symbol now sir value being less than or equal to judging threshold carries out respective handling, is set as a preset value UP (indicated horsepower rising) by its primary system one.According to the value of all TPC symbols, it is merged subsequently, and obtain corresponding power control instruction.Adjust according to the transmitting power of this power control instruction to mobile terminal.Above-mentioned transmitting power control procedure can reject not accurate enough TPC symbol preferably, to promote the accuracy that transmitting power controls further, reduces the impact on communication quality.
In preferred embodiment of the present invention, also provide a kind of mobile terminal, comprising above-mentioned emissive power control system.
In preferred embodiment of the present invention, also provide a kind of mobile terminal, wherein adopt above-mentioned transmit power controlling method.
The foregoing is only preferred embodiment of the present invention; not thereby embodiments of the present invention and protection range is limited; to those skilled in the art; should recognize and all should be included in the scheme that equivalent replacement done by all utilizations specification of the present invention and diagramatic content and apparent change obtain in protection scope of the present invention.
Claims (9)
1. an emissive power control system, is applicable to mobile terminal; It is characterized in that, comprising:
Receiving element, for receiving the transmission signal of base station;
Computing unit, connects described receiving element, for the signal interference ratio according to the corresponding power control group of the calculated signals received;
First decision unit, connect described computing unit, a judging threshold is preset with in described first decision unit, for the signal interference ratio of described power control group and described judging threshold being compared, and value judgement signal interference ratio being less than or equal to the power control symbols of the power control group of described judging threshold is a preset value;
Second decision unit, connects described first decision unit and described receiving element, exports corresponding power control instruction according to the value of the power control symbols received;
Power control unit, connects described second decision unit, for adjusting the transmitting power of described mobile terminal according to described power control instruction.
2. emissive power control system as claimed in claim 1, it is characterized in that, described computing unit calculates signal energy value and the interference energy value of corresponding described power control group according to the power control symbols of the common pilot channel of each community, the pilot tone of dedicated channel and dedicated channel, and and then calculates the signal interference ratio of corresponding described power control group.
3. emissive power control system as claimed in claim 1, it is characterized in that, described second decision unit exports the described power control instruction turning down transmitting power accordingly when there being the value indicated horsepower of a described power control symbols to decline, and exports when the value indicated horsepower without any described power control symbols declines the described power control instruction heightening transmitting power accordingly.
4. a transmit power controlling method, is applicable to mobile terminal, it is characterized in that, comprising:
Step S1, obtains the transmission signal of base station;
Step S2, obtains the signal interference ratio of corresponding power control group according to described calculated signals;
Step S3, compares described signal interference ratio and the judging threshold preset, and the power control symbols of the described power control group corresponding to the described signal interference ratio being less than or equal to described judging threshold is set as a preset value;
Step S4, adjudicates the value of all described power control symbols, and exports corresponding power control instruction according to court verdict;
Step S5, controls the transmitting power of described mobile terminal according to described power control instruction.
5. transmit power controlling method as claimed in claim 4, it is characterized in that, in described step S2, calculate signal energy value and the interference energy value of corresponding described power control group according to the power control symbols of the Common Pilot Channel of each community, the pilot tone of dedicated channel and dedicated channel, and and then calculate the signal interference ratio of corresponding power control group.
6. transmit power controlling method as claimed in claim 4, it is characterized in that, described step S3 specifically comprises:
Step S31, compares described signal interference ratio and the judging threshold preset:
If described signal interference ratio is greater than described judging threshold, then directly go to described step S4;
Step S32, is set as a preset value by described power control symbols corresponding for described signal interference ratio, goes to described step S4 subsequently.
7. transmit power controlling method as claimed in claim 4, it is characterized in that, described step S4 specifically comprises:
Step S41, obtains all described power control symbols;
Step S42, adjudicates the value of all described power control symbols, and exports corresponding power control instruction according to court verdict:
If the value indicated horsepower having described power control symbols declines, then the instruction of transmitting power is turned down in corresponding output;
If the value indicated horsepower that there is not any described power control symbols declines, then the instruction of transmitting power is heightened in corresponding output.
8. a mobile terminal, is characterized in that, comprises the emissive power control system as described in claim 1-3.
9. a mobile terminal, is characterized in that, adopts the transmit power controlling method as described in claim 4-7.
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| CN201410375214.7A CN105451318A (en) | 2014-07-31 | 2014-07-31 | Transmitting power control system and method and mobile terminal |
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| CN201410375214.7A CN105451318A (en) | 2014-07-31 | 2014-07-31 | Transmitting power control system and method and mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113395113A (en) * | 2021-06-11 | 2021-09-14 | 桂林电子科技大学 | Differential demodulation method based on color shift keying |
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| CN1819483A (en) * | 2006-02-28 | 2006-08-16 | 北京天碁科技有限公司 | Down power controlling system and method based on mobile terminal power prediction |
| CN1983848A (en) * | 2006-04-14 | 2007-06-20 | 华为技术有限公司 | Method for controlling down-link transmitting power |
| CN101188442A (en) * | 2006-11-15 | 2008-05-28 | 中兴通讯股份有限公司 | Closed loop power control method |
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Application publication date: 20160330 |