CN103391605B - Transmission power control method and device - Google Patents
Transmission power control method and device Download PDFInfo
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- CN103391605B CN103391605B CN201210139271.6A CN201210139271A CN103391605B CN 103391605 B CN103391605 B CN 103391605B CN 201210139271 A CN201210139271 A CN 201210139271A CN 103391605 B CN103391605 B CN 103391605B
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Abstract
The present invention provides a kind of transmitting power control TPC method and device. Wherein TPC method comprises: carry out joint-detection to received signal, exports TPC symbol; The described TPC symbol of cumulative predetermined number; If the imaginary part of the TPC symbol after cumulative is greater than 0, it is determined that the numerical value of TPC command word is the first value, and described first value is used to indicate reduction through-put power; If the imaginary part of the TPC symbol after cumulative is less than or equals 0, it is determined that the numerical value of TPC command word is two-value, and described two-value is used to indicate raising through-put power; Numerical value according to described TPC command word carries out TPC. Adopt transmitting power control TPC method provided by the invention and device, it is possible to improve the accuracy of TPC.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to a kind of transmitting power control (TransmitPowerControl is called for short TPC) method and device.
Background technology
In time-division (TimeDivision is called for short TD) network, when not having business, sending special burst (SpecialBurst is called for short SB), its effect is only for maintaining the synchronous of link. On R4 carrier wave, the time of SB will account for the 50% of whole air time; On high-speed packet access (HighSpeedPacketAccess, be called for short HSPA) carrier wave, with channel only for command transmitting, that have that the time more than 90% sends with channel is SB. In the TD network on basis, the transmitted power that transmitting SB adopts and the transmission power that transmitting business data adopt are identical, therefore, without, under the scene of business, the existence of SB can cause problem of co-channel interference.
At present, being on the increase of TD number of users, owing to frequency resource has finiteness, problem of co-channel interference is more and more serious. The conversation loss caused by problem of co-channel interference or user experience the class problem being deteriorated and becoming more serious in existing net. In order to reduce the harm of co-channel interference, the TD network improved occurs, has wherein utilized the data characteristics of SB, reduce its transmitted power.
Owing to the transmitted power of SB reduces, the power of the SB signal received diminishes, if still adopting original TPC detection method, TPC command word cannot accurately be detected from SB signal, cannot carry out power control accurately.
Summary of the invention
The first aspect of the invention is to provide a kind of TPC method, in order to solve defect of the prior art, it is to increase 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, it is to increase the accuracy of TPC.
The first aspect of the invention is to provide a kind of transmitting power control TPC method, comprising:
Carry out joint-detection to received signal, export TPC symbol;
The described TPC symbol of cumulative predetermined number;
If the imaginary part of the TPC symbol after cumulative is greater than 0, it is determined that the numerical value of TPC command word is the first value, and described first value is used to indicate reduction through-put power;
If the imaginary part of the TPC symbol after cumulative is less than or equals 0, it is determined that the numerical value of TPC command word is two-value, and described two-value is used to indicate raising through-put power;
Numerical value according to described TPC command word carries out TPC.
Method as above, wherein, the described TPC symbol of described cumulative predetermined number comprises:
AdoptThe TPC symbol that joint-detection exports is added up, wherein, y 'tpcRepresent the TPC symbol after adding up, diRepresenting the TPC symbol that i-th joint-detection exports, kc represents predetermined number.
Method as above, wherein, described predetermined number is 16/SF, and wherein, SF represents the numerical value of the frequency factor of the expansion in described Received signal strength.
Method as above, wherein, described first value is 00; Described two-value is 11.
Another aspect of the present invention is to provide a kind of transmitting power control TPC device, comprising:
Detecting unit, for carrying out joint-detection to received signal, exports TPC symbol;
Cumulative unit, for the described TPC symbol of cumulative predetermined number;
TPC command word unit, when being greater than 0 for the imaginary part of the TPC symbol after cumulative, it is determined that the numerical value of TPC command word is the first value, and described first value is used to indicate reduction through-put power; When the imaginary part of the TPC symbol after adding up is less than or equals 0, it is determined that the numerical value of TPC command word is two-value, and described two-value is used to indicate raising through-put power;
Power control unit, for carrying out TPC according to the numerical value of described TPC command word.
Device as above, wherein, described cumulative unit is specifically for adoptingThe TPC symbol that joint-detection exports is added up, wherein, y 'tpcRepresent the TPC symbol after adding up, diRepresenting the TPC symbol that i-th joint-detection exports, kc represents predetermined number.
Device as above, wherein, described predetermined number is 16/SF, and wherein, SF represents the numerical value of the frequency factor of the expansion in described Received signal strength.
Device as above, wherein, described first value is 00; Described two-value is 11.
From above-mentioned embodiment, after obtaining the TPC symbol that joint-detection exports, first the TPC symbol that the joint-detection of predetermined number exports is added up, then determine the numerical value of TPC command word according to the imaginary part of the TPC symbol after cumulative, carry out power control according to the numerical value of this TPC command word. Owing to the numerical value of TPC command word is that the TPC symbolic computation after basis adds up obtains, therefore when reducing the transmitted power of SB, calculate according to the output symbol after cumulative, it is possible to obtain the calculation result of the numerical value of TPC command word more accurately, it is to increase the accuracy of TPC.
Accompanying drawing explanation
Fig. 1 is the schema of the TPC method of the embodiment of the present invention one;
Fig. 2 is the schema 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 comprising kc TPC command word. Wherein, the number in the Xu Ma road that each user of gap uses when kc represents per, kc is relevant with the numerical value expanding the factor (SpreadingFactor is called for short SF) frequently, kc=16/SF. Adopt the TPC method of the embodiment of the present invention, receiving end is when receiving SB, the output symbol of 16/SF joint-detection is added up, obtain and merge gain, and then utilize the binary phase-shift key control (BinaryPhaseShiftKey of TPC, it is called for short BPSK) modulation characteristic, adjudicate by the imaginary part and 0 of above-mentioned cumulative value, obtain the numerical value of TPC command word.
Fig. 1 is the schema 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 joint-detection to received signal, exports TPC symbol.
Specifically, the method for the embodiment of the present invention one can be applied to base station (NodeB is called for short NB) or user equipment (UserEquipment is called for short UE). When being applied to NB, in this step, Received signal strength is uplink receiving signal, and uplink receiving signal is carried out joint-detection by NB, exports TPC symbol. When being applied to UE, in this step, Received signal strength is down receiving signal, and down receiving signal is carried out joint-detection by UE, exports TPC symbol.
Step 102: the TPC symbol of cumulative predetermined number.
In this step, the TPC symbol above-mentioned joint-detection of predetermined number exported adds up, obtain cumulative after TPC symbol.
Step 103: if the imaginary part of the TPC symbol after cumulative is greater than 0, it is determined that the numerical value of TPC command word is the first value, and this first value is used to indicate reduction through-put power; If the imaginary part of the TPC symbol after cumulative is less than or equals 0, it is determined that the numerical value of TPC command word is two-value, and this two-value is used to indicate raising through-put power.
Step 104: carry out TPC according to the numerical value of TPC command word.
Specifically, 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, down transmitting power is carried out TPC according to the numerical value of TPC command word by NB. When being applied to UE, in this step, uplink transmission power is carried out TPC according to the numerical value of TPC command word by UE. When carrying out TPC, if the numerical value of TPC command word is the first value, then reduce through-put power; If the numerical value of TPC command word is two-value, then improve through-put power.
In the embodiment of the present invention one, after obtaining the TPC symbol that joint-detection exports, first the TPC symbol that the joint-detection of predetermined number exports is added up, then determine the numerical value of TPC command word according to the imaginary part of the TPC symbol after cumulative, carry out power control according to the numerical value of this TPC command word. Owing to the numerical value of TPC command word is that the TPC symbolic computation after basis adds up obtains, therefore when reducing the transmitted power of SB, calculate according to the output symbol after cumulative, it is possible to obtain the calculation result of the numerical value of TPC command word more accurately, it is to increase the accuracy of TPC.
Fig. 2 is the schema of the TPC method of the embodiment of the present invention two. Wherein, predetermined number is kc, kc=16/SF. As shown in Figure 2, the method comprises following process.
Step 201: carry out joint-detection to received signal, exports TPC symbol.
Specifically, 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, Received signal strength is uplink receiving signal, and uplink receiving signal is carried out joint-detection by NB, exports TPC symbol. When being applied to UE, in this step, Received signal strength is down receiving signal, and down receiving signal is carried out joint-detection by UE, exports TPC symbol. In this step, with diRepresent the TPC symbol that i-th joint-detection exports, wherein, i=1,2 ..., kc, kc=16/SF.
Step 202: the TPC symbol that cumulative kc joint-detection exports, obtains the TPC symbol after adding up.
In this step, predetermined number is specially kc, and wherein, kc=16/SF, SF represent the numerical value of the frequency factor of the expansion in Received signal strength. The TPC symbol adopting following formula joint-detection to be exported adds up:
Wherein, y 'tpcRepresent the TPC symbol after adding up, diRepresent the TPC symbol that i-th joint-detection exports.
Step 203: the imaginary part calculating the TPC symbol after adding up.
In this step, adopt following formula to the imaginary part calculating the TPC symbol after adding up:
ytpc=imag(y��tpc)
Wherein, ytpcRepresent cumulative after the imaginary part of TPC symbol, imag represents and gets imaginary-part operation, y 'tpcRepresent the TPC symbol after adding up,
Step 204: judge whether the imaginary part of the TPC symbol after adding up is greater than 0.
If it does, perform step 205. If not, step 206 is performed.
Step 205: the numerical value determining 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 reduction through-put power.
Step 206: the numerical value determining TPC command word is two-value.
In this step, the two-value of the numerical value of TPC command word is specially 11, is used to indicate raising through-put power.
Step 207: carry out TPC according to the numerical value of TPC command word.
Specifically, 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, down transmitting power is carried out TPC according to the numerical value of TPC command word by NB. When being applied to UE, in this step, uplink transmission power is carried out TPC according to the numerical value of TPC command word by UE. When carrying out TPC, if the numerical value of TPC command word is the first value, it is 00, then reduces through-put power; If the numerical value of TPC command word is two-value, it is 11, then improves through-put power.
In the embodiment of the present invention two, after obtaining the TPC symbol that joint-detection exports, first the TPC symbol that the joint-detection of predetermined number exports is added up, then determine the numerical value of TPC command word according to the imaginary part of the TPC symbol after cumulative, carry out power control according to the numerical value of this TPC command word. Owing to the numerical value of TPC command word is that the TPC symbolic computation after basis adds up obtains, therefore when reducing the transmitted power of SB, calculate according to the output symbol after cumulative, it is possible to obtain the calculation result of the numerical value of TPC command word more accurately, it is to increase 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, for carrying out joint-detection to received signal, exports TPC symbol. Cumulative unit 32 is for the TPC symbol of cumulative predetermined number. When TPC command word unit 33 is greater than 0 for the imaginary part of the TPC symbol after cumulative, it is determined that the numerical value of TPC command word is the first value, and the first value is used to indicate reduction through-put power; When the imaginary part of the TPC symbol after adding up is less than or equals 0, it is determined that the numerical value of TPC command word is two-value, and two-value is used to indicate raising through-put power. Power control unit 34 carries out TPC for the numerical value according to TPC command word.
On the basis of technique scheme, further, cumulative unit 32 is specifically for adoptingThe TPC symbol that joint-detection exports is added up, wherein, y'tpcRepresent the TPC symbol after adding up, diRepresenting the TPC symbol that i-th joint-detection exports, kc represents predetermined number.
On the basis of technique scheme, further, specifically for adopting, following formula calculates the imaginary part of the TPC symbol after adding up to TPC command word unit 33:
ytpc=imag(y��tpc)
Wherein, ytpcRepresent cumulative after the imaginary part of TPC symbol, imag represents and gets imaginary-part operation, y 'tpcRepresent the TPC symbol after adding up. Then, TPC command word unit 33 judges ytpcWhether it is greater than 0. At ytpcWhen being greater than 0, TPC command word unit 33 determines that the numerical value of TPC command word is the first value, and the first value is used to indicate reduction through-put power;At ytpcWhen being less than or equal 0, TPC command word unit 33 determines that the numerical value of TPC command word is two-value, and two-value is used to indicate 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, specifically, when the numerical value of TPC command word is the first value, power control unit 34 controls transfer power reduction, when the numerical value of TPC command word is two-value, power control unit 34 controls transfer power improves.
On the basis of technique scheme, further, predetermined number is 16/SF, and wherein, SF represents the numerical value of the frequency factor of the expansion in Received signal strength.
On the basis of technique scheme, further, the first value is specifically as follows 00; Two-value is specifically as follows 11.
In the TPC device of the embodiment of the present invention three, the concrete executive mode of each unit and subelement thereof can see the record of the embodiment of the present invention one and the TPC method of 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, after detecting unit obtains the TPC symbol that joint-detection exports, the TPC symbol that the joint-detection of predetermined number exports first is added up by cumulative unit, then TPC command word unit determines the numerical value of TPC command word 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. Owing to the numerical value of TPC command word is that the TPC symbolic computation after basis adds up obtains, therefore when reducing the transmitted power of SB, calculate according to the output symbol after cumulative, it is possible to obtain the calculation result of the numerical value of TPC command word more accurately, it is to increase the accuracy of TPC.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can be completed by the hardware that programmed instruction is relevant. Aforesaid program can be stored in a computer read/write memory medium. This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage media comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate the technical scheme of the present invention, it is not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technology feature is carried out equivalent replacement; And these amendments or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (4)
1. a transmitting power control TPC method, it is characterised in that, comprising:
Carry out joint-detection to received signal, export TPC symbol;
The described TPC symbol of cumulative predetermined number;
If the imaginary part of the TPC symbol after cumulative is greater than 0, it is determined that the numerical value of TPC command word is the first value, and described first value is used to indicate reduction through-put power;
If the imaginary part of the TPC symbol after cumulative is less than or equals 0, it is determined that the numerical value of TPC command word is two-value, and described two-value is used to indicate raising through-put power;
Numerical value according to described TPC command word carries out TPC;
The described TPC symbol of described cumulative predetermined number comprises:
AdoptThe TPC symbol that joint-detection exports is added up, wherein, y'tpcRepresent the TPC symbol after adding up, diRepresenting the TPC symbol that i-th joint-detection exports, kc represents predetermined number;
Described predetermined number is 16/SF, and wherein, SF represents the numerical value of the frequency factor of the expansion in described Received signal strength.
2. method according to claim 1, it is characterised in that,
Described first value is 00; Described two-value is 11.
3. a transmitting power control TPC device, it is characterised in that, comprising:
Detecting unit, for carrying out joint-detection to received signal, exports TPC symbol;
Cumulative unit, for the described TPC symbol of cumulative predetermined number;
TPC command word unit, when being greater than 0 for the imaginary part of the TPC symbol after cumulative, it is determined that the numerical value of TPC command word is the first value, and described first value is used to indicate reduction through-put power; When the imaginary part of the TPC symbol after adding up is less than or equals 0, it is determined that the numerical value of TPC command word is two-value, and described two-value is used to indicate raising through-put power;
Power control unit, for carrying out TPC according to the numerical value of described TPC command word;
Described cumulative unit is specifically for adoptingThe TPC symbol that joint-detection exports is added up, wherein, y'tpcRepresent the TPC symbol after adding up, diRepresenting the TPC symbol that i-th joint-detection exports, kc represents predetermined number;
Described predetermined number is 16/SF, and wherein, SF represents the numerical value of the frequency factor of the expansion in described Received signal strength.
4. device according to claim 3, it is characterised in that,
Described first value is 00; Described two-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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| US8095168B2 (en) * | 2008-02-26 | 2012-01-10 | Interdigital Technology Corporation | Method and apparatus for performing closed-loop transmit power control for fractional dedicated physical channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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