CN103391605A - Transmission power control method and device - Google Patents
Transmission power control method and device Download PDFInfo
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- CN103391605A CN103391605A CN2012101392716A CN201210139271A CN103391605A CN 103391605 A CN103391605 A CN 103391605A CN 2012101392716 A CN2012101392716 A CN 2012101392716A CN 201210139271 A CN201210139271 A CN 201210139271A CN 103391605 A CN103391605 A CN 103391605A
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Abstract
The invention provides a transmission power control (TPC) method and device. The TPC method comprises the following steps of carrying out joint detection on received signals to output TPC symbols, accumulating a preset number of the TPC symbols, determining the value of a TPC command word as a first value if the imaginary part of the accumulated TPC symbols is larger than 0, wherein the first value is used for indicating to lower transmission power, determining the value of the TPC command word as a second value if the imaginary part of the accumulated TPC symbols is smaller than or equal to 0, wherein the second value is used for indicating to improve the transmission power, and carrying out TPC according to the value of the TPC command word. By means of the TPC method and device, the accuracy of TPC can be improved.
Description
Technical field
The present invention relates to mobile communication technology, relate in particular to a kind of through-put power and control (Transmit Power Control is called for short TPC) method and apparatus.
Background technology
In time-division (Time Division is called for short TD) network, when there is no business, can send special burst (Special Burst is called for short SB), its effect only is used for keeping the synchronous of link.On the R4 carrier wave, the time of SB will account for 50% of whole air times; On high-speed packet access (High Speed Packet Access is called for short HSPA) carrier wave, follow channel only to be used for command transmitting, having what surpass that time of 90% follows that channel sends is SB.In the TD on basis network, the transmitting power that emission SB adopts is identical with the transmitted power of transmitting business the data, and therefore, under the scene without business, the existence of SB can cause problem of co-channel interference.
At present, being on the increase of TD number of users, because the frequency resource has finiteness, problem of co-channel interference is more and more serious.The conversation loss that is caused by problem of co-channel interference or user experience variation becomes a class problem more serious in existing network.In order to reduce the harm of co-channel interference, improved TD network has appearred, wherein utilize the data characteristics of SB, reduce its transmitting power.
Due to the transmitting power reduction of SB, the power of the SB signal that receives diminishes, and, if still adopt original TPC detection method, the TPC command word can't be detected exactly from the SB signal, can't carry out power accurately and control.
Summary of the invention
First aspect of the present invention is to provide a kind of TPC method,, in order to solve defect of the prior art, improves the accuracy of TPC.
Another aspect of the present invention is to provide a kind of TPC device,, in order to solve defect of the prior art, improves the accuracy of TPC.
First aspect of the present invention is to provide a kind of through-put power and controls the TPC method, comprising:
Carry out to received signal joint-detection, output TPC symbol;
The described TPC symbol of cumulative default number;
If the imaginary part of the TPC symbol after cumulative is greater than 0, the numerical value of determining the TPC command word is the first value, and described the first value is used to indicate the reduction through-put power;
If the imaginary part of the TPC symbol after cumulative is less than or equal to 0, the numerical value of determining the TPC command word is the second value, and described the second value is used to indicate the raising through-put power;
Carry out TPC according to the numerical value of described TPC command word.
Method as above, wherein, the described TPC symbol of described cumulative default number comprises:
Adopt
TPC symbol to joint-detection output adds up, wherein, and y '
tpcTPC symbol after expression is cumulative, d
iThe TPC symbol that represents i joint-detection output, kc represent default number.
Method as above, wherein, described default number is 16/SF, wherein, SF represents the numerical value of the spreading factor in described reception signal.
Method as above, wherein, described the first value is 00; Described the second value is 11.
Another aspect of the present invention is to provide a kind of through-put power and controls the TPC device, comprising:
Detecting unit, be used for carrying out to received signal joint-detection, output TPC symbol;
Cumulative unit, be used for the cumulative described TPC symbol of presetting number;
TPC command word unit, be used for the imaginary part of the TPC symbol after adding up greater than 0 o'clock, and the numerical value of determining the TPC command word is the first value, and described the first value is used to indicate the reduction through-put power; The imaginary part of the TPC symbol after adding up is less than or equal at 0 o'clock, and the numerical value of determining the TPC command word is the second value, and described the second value is used to indicate the raising through-put power;
Power control unit, be used for carrying out TPC according to the numerical value of described TPC command word.
Device as above, wherein, described cumulative unit specifically is used for adopting
TPC symbol to joint-detection output adds up, wherein, and y '
tpcTPC symbol after expression is cumulative, d
iThe TPC symbol that represents i joint-detection output, kc represent default number.
Device as above, wherein, described default number is 16/SF, wherein, SF represents the numerical value of the spreading factor in described reception signal.
Device as above, wherein, described the first value is 00; Described the second value is 11.
By above-mentioned embodiment as seen, after the TPC symbol that obtains joint-detection output, at first the TPC symbol of the joint-detection of default number being exported adds up, then determine the numerical value of TPC command word according to the imaginary part of the TPC symbol after cumulative, according to the numerical value of this TPC command word, carry out power control.Because the numerical value of TPC command word is to obtain according to the TPC sign computation after cumulative, therefore in the situation that reduce the transmitting power of SB, calculate according to the output symbol after cumulative, can obtain the result of calculation of the numerical value of TPC command word more accurately, improved the accuracy of TPC.
Description of drawings
Fig. 1 is the flow chart of the TPC method of the embodiment of the present invention one;
Fig. 2 is the flow chart of the TPC method of the embodiment of the present invention two;
Fig. 3 is the structural representation of the TPC device of the embodiment of the present invention three.
Embodiment
When sending SB, adopt the data structure that comprises kc TPC command word.Wherein, kc represents the number of the empty code channel that each user of every time slot uses, and the numerical value of kc and spreading factor (Spreading Factor is called for short SF) is relevant, kc=16/SF.Adopt the TPC method of the embodiment of the present invention, receiving terminal is when receiving SB, the output symbol of 16/SF joint-detection is added up, obtain to merge gain, and then utilize binary phase shift keying (the Binary Phase Shift Key of TPC, be called for short BPSK) modulating characteristic, adjudicate with the imaginary part and 0 of above-mentioned accumulated value, obtain the numerical value of TPC command word.
Fig. 1 is the flow chart of the TPC method of the embodiment of the present invention one.As shown in Figure 1, the method comprises following process.
Step 101: carry out to received signal joint-detection, output TPC symbol.
Particularly, the method for the embodiment of the present invention one can be applied to base station (Node B is called for short NB) or subscriber equipment (User Equipment is called for short UE).When being applied to NB, in this step, receiving signal is the uplink receiving signal, and NB carries out joint-detection to the uplink receiving signal, output TPC symbol.When being applied to UE, in this step, the reception signal is down receiving signal, and UE carries out joint-detection to down receiving signal, output TPC symbol.
Step 102: the TPC symbol of cumulative default number.
In this step, the TPC symbol that the above-mentioned joint-detection of default number is exported adds up, the TPC symbol after obtaining to add up.
Step 103: if the imaginary part of the TPC symbol after cumulative greater than 0, the numerical value of determining the TPC command word is the first value, this first value is used to indicate the reduction through-put power; If the imaginary part of the TPC symbol after cumulative is less than or equal to 0, the numerical value of determining the TPC command word is the second value, and this second value is used to indicate the raising through-put power.
Step 104: according to the numerical value of TPC command word, carry out TPC.
Particularly, the method for the embodiment of the present invention one can be applied to NB or UE.When being applied to NB, in this step, NB carries out TPC according to the numerical value of TPC command word to down transmitting power.When being applied to UE, in this step, UE carries out TPC according to the numerical value of TPC command word to uplink transmission power.When carrying out TPC,, if the numerical value of TPC command word is the first value, reduce through-put power; , if the numerical value of TPC command word is the second value, improve through-put power.
In the embodiment of the present invention one, after the TPC symbol that obtains joint-detection output, at first the TPC symbol of the joint-detection of default number being exported adds up, and then according to the imaginary part of the TPC symbol after cumulative, determines the numerical value of TPC command word, according to the numerical value of this TPC command word, carries out power control.Because the numerical value of TPC command word is to obtain according to the TPC sign computation after cumulative, therefore in the situation that reduce the transmitting power of SB, calculate according to the output symbol after cumulative, can obtain the result of calculation of the numerical value of TPC command word more accurately, improved the accuracy of TPC.
Fig. 2 is the flow chart of the TPC method of the embodiment of the present invention two.Wherein, default number is kc, kc=16/SF.As shown in Figure 2, the method comprises following process.
Step 201: carry out to received signal joint-detection, output TPC symbol.
Particularly, the method for the embodiment of the present invention two can be applied to NB or UE.When being applied to NB, in this step, receiving signal is the uplink receiving signal, and NB carries out joint-detection to the uplink receiving signal, output TPC symbol.When being applied to UE, in this step, the reception signal is down receiving signal, and UE carries out joint-detection to down receiving signal, output TPC symbol.In this step, with d
iThe TPC symbol that represents i joint-detection output, wherein, i=1,2 ..., kc, kc=16/SF.
Step 202: the TPC symbol of cumulative kc joint-detection output, the TPC symbol after obtaining to add up.
In this step, default number is specially kc, and wherein, kc=16/SF, SF represent to receive the numerical value of the spreading factor in signal.Adopt following formula to add up to the TPC symbol of joint-detection output:
Wherein, y '
tpcTPC symbol after expression is cumulative, d
iThe TPC symbol that represents i joint-detection output.
Step 203: the imaginary part of calculating the TPC symbol after adding up.
In this step, adopt following formula to calculating the imaginary part of the TPC symbol after adding up:
y
tpc=imag(y′
tpc)
Wherein, y
tpcThe imaginary part of the TPC symbol after expression is cumulative, imag represents to get imaginary-part operation, y '
tpcTPC symbol after expression is cumulative,
Step 204: whether the imaginary part of the TPC symbol after judgement is cumulative is greater than 0.
If so, execution step 205.If not, execution step 206.
Step 205: the numerical value of determining the TPC command word is the first value.
In this step, the first value of the numerical value of TPC command word is specially 00, is used to indicate the reduction through-put power.
Step 206: the numerical value of determining the TPC command word is the second value.
In this step, the second value of the numerical value of TPC command word is specially 11, is used to indicate the raising through-put power.
Step 207: according to the numerical value of TPC command word, carry out TPC.
Particularly, the method for the embodiment of the present invention two can be applied to NB or UE.When being applied to NB, in this step, NB carries out TPC according to the numerical value of TPC command word to down transmitting power.When being applied to UE, in this step, UE carries out TPC according to the numerical value of TPC command word to uplink transmission power.When carrying out TPC,, if the numerical value of TPC command word is the first value, be 00, reduce through-put power; If the numerical value of TPC command word is the second value, be 11, improve through-put power.
In the embodiment of the present invention two, after the TPC symbol that obtains joint-detection output, at first the TPC symbol of the joint-detection of default number being exported adds up, and then according to the imaginary part of the TPC symbol after cumulative, determines the numerical value of TPC command word, according to the numerical value of this TPC command word, carries out power control.Because the numerical value of TPC command word is to obtain according to the TPC sign computation after cumulative, therefore in the situation that reduce the transmitting power of SB, calculate according to the output symbol after cumulative, can obtain the result of calculation of the numerical value of TPC command word more accurately, improved the accuracy of TPC.
Fig. 3 is the TPC device of the embodiment of the present invention three.As shown in Figure 3, this device comprises: detecting unit 31, cumulative unit 32, TPC command word unit 33 and power control unit 34.
Wherein, detecting unit 31 is used for carrying out to received signal joint-detection, output TPC symbol.Cumulative unit 32 is used for the TPC symbol of cumulative default number.The imaginary part that TPC command word unit 33 is used for the TPC symbol after adding up was greater than 0 o'clock, and the numerical value of determining the TPC command word is the first value, and the first value is used to indicate the reduction through-put power; The imaginary part of the TPC symbol after adding up is less than or equal at 0 o'clock, and the numerical value of determining the TPC command word is the second value, and the second value is used to indicate the raising through-put power.Power control unit 34 is used for carrying out TPC according to the numerical value of TPC command word.
On the basis of technique scheme, further, cumulative unit 32 is concrete for adopting
TPC symbol to joint-detection output adds up, wherein, and y'
tpcTPC symbol after expression is cumulative, d
iThe TPC symbol that represents i joint-detection output, kc represent default number.
On the basis of technique scheme, further, TPC command word unit 33 is concrete is used for adopting following formula to calculate the imaginary part of the TPC symbol after adding up:
y
tpc=imag(y′
tpc)
Wherein, y
tpcThe imaginary part of the TPC symbol after expression is cumulative, imag represents to get imaginary-part operation, y '
tpcTPC symbol after expression is cumulative.Then, TPC command word unit 33 judgement y
tpcWhether greater than 0.At y
tpcGreater than 0 o'clock, TPC command word unit 33 determined that the numerical value of TPC command word is the first value, and the first value is used to indicate the reduction through-put power; At y
tpcBe less than or equal at 0 o'clock, TPC command word unit 33 determines that the numerical value of TPC command word is the second value, and the second value is used to indicate the raising through-put power.
On the basis of technique scheme, further, power control unit 34 carries out TPC according to the numerical value of TPC command word, particularly, when the numerical value of TPC command word is the first value, power control unit 34 is controlled through-put power and is reduced, and when the numerical value of TPC command word was the second value, power control unit 34 was controlled through-put power and improved.
On the basis of technique scheme, further, default number is 16/SF, and wherein, SF represents to receive the numerical value of the spreading factor in signal.
On the basis of technique scheme, further, the first value is specifically as follows 00; The second value is specifically as follows 11.
In the TPC device of the embodiment of the present invention three, the concrete executive mode of unit and subelement thereof can be referring to the record of the TPC method of the embodiment of the present invention one and the embodiment of the present invention two.The TPC device of the embodiment of the present invention three can be arranged in NB or UE.
In the embodiment of the present invention three, obtain the TPC symbol of joint-detection output at detecting unit after, cumulative unit first adds up to the TPC symbol that the joint-detection of default number is exported, then the numerical value of TPC command word is determined in TPC command word unit according to the imaginary part of the TPC symbol after cumulative, and power control unit carries out power control according to the numerical value of this TPC command word.Because the numerical value of TPC command word is to obtain according to the TPC sign computation after cumulative, therefore in the situation that reduce the transmitting power of SB, calculate according to the output symbol after cumulative, can obtain the result of calculation of the numerical value of TPC command word more accurately, improved the accuracy of TPC.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can be completed by the hardware that program command is correlated with.Aforesaid program can be stored in a computer read/write memory medium.This program when carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that finally: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to aforementioned each embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a through-put power is controlled the TPC method, it is characterized in that, comprising:
Carry out to received signal joint-detection, output TPC symbol;
The described TPC symbol of cumulative default number;
If the imaginary part of the TPC symbol after cumulative is greater than 0, the numerical value of determining the TPC command word is the first value, and described the first value is used to indicate the reduction through-put power;
If the imaginary part of the TPC symbol after cumulative is less than or equal to 0, the numerical value of determining the TPC command word is the second value, and described the second value is used to indicate the raising through-put power;
Carry out TPC according to the numerical value of described TPC command word.
2. method according to claim 1, is characterized in that, the described TPC symbol of described cumulative default number comprises:
Adopt
TPC symbol to joint-detection output adds up, wherein, and y '
tpcTPC symbol after expression is cumulative, d
iThe TPC symbol that represents i joint-detection output, kc represent default number.
3. method according to claim 1 and 2, is characterized in that,
Described default number is 16/SF, and wherein, SF represents the numerical value of the spreading factor in described reception signal.
4. method according to claim 1 and 2, is characterized in that,
Described the first value is 00; Described the second value is 11.
5. a through-put power is controlled the TPC device, it is characterized in that, comprising:
Detecting unit, be used for carrying out to received signal joint-detection, output TPC symbol;
Cumulative unit, be used for the cumulative described TPC symbol of presetting number;
TPC command word unit, be used for the imaginary part of the TPC symbol after adding up greater than 0 o'clock, and the numerical value of determining the TPC command word is the first value, and described the first value is used to indicate the reduction through-put power; The imaginary part of the TPC symbol after adding up is less than or equal at 0 o'clock, and the numerical value of determining the TPC command word is the second value, and described the second value is used to indicate the raising through-put power;
Power control unit, be used for carrying out TPC according to the numerical value of described TPC command word.
6. device according to claim 5, is characterized in that,
Described cumulative unit specifically is used for adopting
TPC symbol to joint-detection output adds up, wherein, and y '
tpcTPC symbol after expression is cumulative, d
iThe TPC symbol that represents i joint-detection output, kc represent default number.
7. according to claim 5 or 6 described devices, is characterized in that,
Described default number is 16/SF, and wherein, SF represents the numerical value of the spreading factor in described reception signal.
8. according to claim 5 or 6 described devices, is characterized in that,
Described the first value is 00; Described the second value is 11.
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| CN201210139271.6A CN103391605B (en) | 2012-05-07 | 2012-05-07 | Transmission power control method and device |
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|---|---|---|---|
| CN201210139271.6A CN103391605B (en) | 2012-05-07 | 2012-05-07 | Transmission power control method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109863792A (en) * | 2016-09-14 | 2019-06-07 | 株式会社Ntt都科摩 | User terminal and wireless communications method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009108666A2 (en) * | 2008-02-26 | 2009-09-03 | Interdigital Technology Corporation | Method and apparatus for performing closed-loop transmit power control for fractional dedicated physical channel |
| CN101741434A (en) * | 2008-11-14 | 2010-06-16 | 普天信息技术研究院有限公司 | Closed loop power control method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009108666A2 (en) * | 2008-02-26 | 2009-09-03 | Interdigital Technology Corporation | Method and apparatus for performing closed-loop transmit power control for fractional dedicated physical channel |
| CN101741434A (en) * | 2008-11-14 | 2010-06-16 | 普天信息技术研究院有限公司 | Closed loop power control method |
Non-Patent Citations (1)
| Title |
|---|
| 袁杰萍: "《中国优秀博硕士学位论文全文数据库》", 15 June 2007 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109863792A (en) * | 2016-09-14 | 2019-06-07 | 株式会社Ntt都科摩 | User terminal and wireless communications method |
| CN109863792B (en) * | 2016-09-14 | 2022-08-16 | 株式会社Ntt都科摩 | Terminal, wireless communication method, base station and system |
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Granted publication date: 20160608 |