CN102340858B - Method and device for setting target SINR (Signal-to-Interference and Noise Ratio) in PUSCH (Physical Uplink Shared Channel) power control - Google Patents

Abstract

The invention discloses a method and a device for setting a target SINR (Signal-to-Interference and Noise Ratio) in PUSCH (Physical Uplink Shared Channel) power control and relates to a communication technique. According to the method provided by the embodiment of the invention, an expected receiving power value of a base station is confirmed according to an average uplink PUSCH receiving power of the base station in a previous period, and then the target SINR is confirmed according to the expected receiving power value of the base station and a total uplink interference. The target SINR is changed in real time by use of the average uplink PUSCH receiving power of the base station, thereby avoiding the confliction of a plurality of adjusting processes and enhancing the performance of a communication system.

Description

Target SINR method to set up and device in a kind of PUSCH power control

Technical field

The present invention relates to the communication technology, relate in particular to target SINR method to set up and device in a kind of PUSCH power control.

background technology

LTE (Long Term Evolution, Long Term Evolution) system is with OFDM (Orthogonal FrequencyDivision Multiplexing, OFDM) technology is that packet data transmission is carried out on basis, when Dang Ge community adopts identical networking, need to carry out power control process and avoid the interference between community too high, thereby cause systematic function to decline.

According to transmitted power, be to determine or determined by recipient by transmit leg, power can be controlled and is divided into open Loop Power control and close-loop power control two classes.By transmitting terminal, based on self, to the understanding of channel, decide the mode of its transmitted power to be called as open Loop Power control.The benefit of open Loop Power control is not need extra signaling consumption; But shortcoming is transmitting terminal often deviation with physical presence to the understanding of channel, therefore based on channel being familiar with to inaccurate open Loop Power control, be conventionally inaccurate.The mode that is determined the transmitted power of transmitting terminal by recipient is just called as close-loop power control.The benefit of close-loop power control is the received signal quality that transmitting terminal can be actual according to it, decides the transmitted power of transmitting terminal, and power is adjusted more accurate; Shortcoming is to need extra signaling consumption.

The UE describing in standard sends PUSCH (Physical Uplink Shared Channel at subframe i, Physical Uplink Shared Channel) the transmitted power P on channel OFDM (Orthogonal Frequency DivisionMultiplexing, OFDM) symbol _pUSCh is determined by formula (1):

In formula (1), P _cMAXit is the maximum transmission power that UE allows;

In formula (1), M _pUSCH(i) be that i subframe is the amount of bandwidth that PUSCH distributes, with Physical Resource Block (PRB) number, represent;

In formula (1), P _{o_PUSCH}(j) be PUSCH power initial value, by the community exclusive normalization part P of 8bit _{o_NOMINAL_PUSCH}and the exclusive part P of the UE of 4bit (j) _{o_UE_PUSCH}(j) sum forms; Wherein, P _{o_ NOMINAL_PUSCH}(j) (j=0 or 1) and P _{o_UE_PUSCH}(j) (j=0 or 1) configured by rrc layer, if PUSCH just passes/retransmit corresponding resource, is SPS UL-grant (Semi-Persistent Scheduling Uplink-grant, line command on semi-continuous scheduling), so j=0; If it is the UL-grant (Uplink-grant, upper line command) of dynamic dispatching, so j=1 that PUSCH just passes/retransmit the resource of using.The PUSCH of the PUSCH of dynamic dispatching and continuous dispatching is used to the different power contorl parameters of two covers, this two covers parameter is respectively by different RRC (Radio Resource Control, Radio Resource control) a layer IE (Information Element, information unit) is configured.For the re-transmission of random access Msg3 (Message3, a piece of news in the random access procedure of protocol description) or just pass j=2, now P _{o_UE_PUSCH}(2)=0 and P _{o_NOMINAL_PUSCH}(2)=P _{o_PRE}+ Δ _{pREAMBLE_Msg3}, Δ P wherein _{o_PRE}and Δ _{pREAMBLE_Msg3}by rrc layer, configure;

In formula (1), α (j) is path loss compensating factor, j=0 or 1 o'clock, and { 0,0.4,0.5,0.6,0.7,0.8,0.9,1} is the cell-level parameter of a 3bit, by rrc layer signal deployment to α ∈.During j=2, α (j)=1;

In formula (1), PL (Path Loss, path loss) is the downlink path loss that UE measures, and unit is dB;

In formula (1), Δ _tF(i) be the gain of transformat, whether represent according to different MCS (Modulation & Coding Scheme, Modulation and Coding Scheme) grade is adjusted sending PSD (Power Spectrum Density, power spectral density).K _s=1.25 o'clock, k _s=0 o'clock, Δ _tF(i)=0.Wherein, K _sbe the exclusive parameter of UE, (this parameter configuration is en0, represents disabled state, i.e. K in the exclusive parameter d eltaMCS-Enabled indication of uplink power control UE of indicating in RRC signaling _sbe 0; Be configured to en1, represent enabled state, i.e. K _sbe 1.25).And, in the data that PUSCH transmits, there is no UL-SCH (Uplink Shared Channel, Uplink Shared Channel) data, while only having the data of control, MPR=O _cQI/ N _rE, in other situation, wherein, C is code block number, K _rthe length of r code block, O _cQIto comprise CRC bit at interior CQI (Channel Quality Indicator, channel quality indication) bit number, N _rEbe the sum of Resource Unit (RE), be defined as c wherein, K _r, with definition in 3GPP (3rd Generation Partnership Project) standard 36.212, C, K _rwith can both from PDCCH corresponding to the first transmission of transmission block (Physical downlink control channel, Physical Downlink Control Channel), obtain;

In formula (1), f (i) provides current PUSCH power and controls adjustment state, and it is defined as:

If the exclusive parameter A ccumulation-enabled of 1 UE notifying by rrc layer has opened the power of accumulated value mode and has controlled, or TPC (Transmission Power Control) command word δ _pUSCHbe included in DCI Format0 (Downlink Control Information Format0, descending control information format 0) in, and CRC (Cyclic Redundancy Check, CRC) check bit adopts Temporary C-RNTI (Temporary Cell Radio Network Temporary Identity, interim cell-radio network sign) PDCCH of scrambling, f (i)=f (i-1)+δ _pUSCH(i-K _pUSCH).

Wherein:

1) δ _pUSCH(i-K _pUSCH) refer to i-K _pUSCHthe TPC order that DCI in subframe (Downlink Control Information, Downlink Control Information) form 0 or 3/3A send, f (0) is the initial value after f (i) resets.

2) K _pUSCHvalue:

For FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)), K _pUSCH=4;

For TDD (Time Division Duplex, time division duplex) UL/DL (Uplink/Downlink, uplink/downlink) configuration 1-6, K _pUSCHvalue is in Table 1;

For TDD UL/DL configuration 0, when the PUSCH transmission by 0 scheduling of PDCCH DCI form is arranged in subframe 2 or 7 and the low bit of the UL index information field of DCI while being 1, K _pUSCH=7; For the PUSCH transmission of other situation, K _pUSCHby table 1, provided.

3) UE is at each non-DRX (Discontinuous Reception, discontinuous reception) C-RNTI (the Cell Radio Network Temporary Identity of this UE for subframe, cell-radio network identifies) or SPS-RNTI (Semi-Persistent Scheduling Radio Network Temporary Identity, semi-continuous scheduling wireless network identification) attempt the PDCCH of a DCI Format0 of decoding, also with the TPC-PUSCH-RNTI of this UE, attempt the PDCCH of a DCI Format3/3A of decoding simultaneously;

4), if UE detects the PDCCH of DCI Format0 and DCI Format3/3A in same subframe simultaneously, UE is only used the TPC order δ being provided by DCI Format0 _pUSCH;

5) when not decoding TPC order or UE in a certain subframe i subframe be not sub-frame of uplink in DRX state or under tdd mode, δ _pUSCH=0dB;

6) as accumulation correction value δ _pUSCHwhen dB is included in the PDCCH with DCI form 0, its adjusted value is in Table 2; But, if the function of DCI Format0 is SPS (Semi-Persistent Scheduling, semi-continuous scheduling), activate or SPS release, δ _pUSCH=0dB.

7) as accumulation correction value δ _pUSCHwhen dB is included in the PDCCH with DCI form 3/3A, its adjusted value set comprises two kinds: set 1 provides, gathers 2 by table 2 and provided by table 3, specifically selects which set to be determined by the bit number of rrc layer parameter TPC-Index.

8), if UE reaches maximum transmission power, the TPC order of " just " is not accumulated; If UE reaches minimum emissive power, the TPC order of " bearing " is not accumulated;

9) work as P _{o_UE_PUSCH}during change, or when receiving accidental access response message (in synchronous/heavy synchronous regime), the UE in following state need to reset the accumulation of TPC order.

When if the exclusive parameter A ccumulation-enabled of 2 UE configuring by rrc layer does not open accumulated value mode, UE is in absolute value closed-loop fashion, f (i)=δ _pUSCH(i-K _pUSCH).

Wherein:

1) δ _pUSCH(i-K _pUSCH) by subframe i-K _pUSCHin the PDCCH indication with DCI form 0.

2) K _pUSCHvalue determine as follows:

For FDD, K _pUSCH=4;

For TDD UL/DL configuration 1-6, K _pUSCHvalue is in Table 1;

For TDD UL/DL configuration 0

3) when the PUSCH transmission by PDCCH DCI form 0 scheduling is arranged in subframe 2 or 7 and the low bit of the UL index information field of DCI while being 1, K _pUSCH=7; For the PUSCH transmission of other situation, K _pUSCHby table 1, provided.

4) δ under absolute value mode _pUSCHby the PDCCH with DCI form 0, indicated δ _pUSCHvalue is in Table 2; If being SPS activation or SPS, the function of DCI Format0 discharges δ _pUSCH=0dB.

5) if do not decode when thering is the PDCCH of DCI format0 or UE i subframe being not sub-frame of uplink in DRX state or under tdd mode f (i)=f (i-1) in certain subframe

3, for two kinds of TPC adjusted value f (*) computational methods (accumulated value mode or absolute value mode), its initial value is set to: work as P _{o_UE_PUSCH}when configuration changes, f (i)=0; Otherwise, f (0)=Δ P _rampup+ δ _msg2, δ wherein _msg2the TPC command word of indicating in accidental access response message, referring to table 4; Δ P _rampupby rrc layer, configured, corresponding to from first to total power amount of climbing between last preamble (random access sequence symbol) transmission.

The K of the different TDD UL/DL configurations of table 1 _pUSCHvalue

Table 2DCI format 0/3TPC command word implication

Table 3DCI format 3ATPC command word implication

Table 4 is for the TPC command word δ of the PUSCH that dispatches _msg2

TPC Command	Value(in dB)
		0	-6
1	-4
		2	-2
3	0
		4	2
5	4
		6	6
7	8

Known by above-mentioned analysis, in formula (1), parameter P _cMAX, P _{o_PUSCH}(J), α (J), Δ _tF(i) and f (i) by base station, determined, M _pUSCH(i) by scheduling, determined.UE side is according to the descending path loss PL measuring _dLvalue, with the PUSCH power control relevant parameter that base station side sends, according to standard regulation, determines the transmitted power of UE.UE side belongs to agreement flow process.

When determining f (i), base station need to use SINR (the Signal to Interference plus Noise Ratio of actual measurement, Signal to Interference plus Noise Ratio) with target SINR size result relatively, when the SINR of actual measurement is less than target SINR, need to raise the PUSCH transmitting power of UE, corresponding f (i) value will be to be less than or equal to 0 value; When the SINR of actual measurement is greater than target SINR, need to lower the PUSCH transmitting power of UE, corresponding f (i) value will be to be greater than 0 value.Concrete f (i) value is stipulated with reference to agreement.

The method of determining at present up PUSCH power control target SINR is, by fixing MCS grade and target SINR (Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio) mapping relations are determined target SINR, respectively in 29 MCS grades, for different target BLER (Block Error Radio, Block Error Rate) (target BLER normally 1% or 10%) corresponding target SINR one by one, when needs are used target SINR, only need to use corresponding MCS grade and target BLER just can determine target SINR.

Although it is simple that this PUSCH power is controlled the method to set up of target SINR, but because this method is to determine target SINR's by the mapping relations of fixing MCS grade, target BLER and target SINR, and various environmental conditions in practical application are Protean, this method can not be flexibly according to real network deployment scenario Offered target SINR, thereby easily cause due to target SINR arrange inaccurate, cause the effect of close-loop power control not fully demonstrate, be unfavorable for better guaranteeing systematic function.

Simultaneously, the definite target SINR of existing scheme binds with MCS grade, and AMC (AdaptiveModulation Coding, Adaptive Modulation and Coding) process, and CQI makeover process is all likely adjusted MCS grade, several processes interact and are easy to occur conflict situations, cause system performance degradation.

For example, during initial power control, PUSCH SINR measured value is controlled target SINR corresponding to MCS grade choosing higher than current power, can trigger the transmitting power that TPC command word is lowered UE, owing to not missing piece, under the effect of CQI correction and AMC, MCS grade can adjust upward simultaneously.Triple interaction, to certain phase, there will be power cannot meet the situation of the MCS grade performance requirement of selection, causes occurring mistake piece.Although power control process also can be judged this situation, and trigger the transmitting power that TPC command word raises UE, but because CQI downward revision is than very fast, while really coming into force Deng TPC command word, MCS grade has been lowered several grades, the SINR that the transmitting power that raises after now coming into force according to TPC command word is corresponding and because target SINR corresponding to the MCS having reduced after CQI downward revision compares, often need lower adjusting power, the follow-up speed of up revising due to CQI debugging functions is slower than the speed that power is controlled downward transmitting power, so being MCS grade, whole structure compares several grades that declined when initial, UE transmitted power several dB that also declined.When again occurring that PUSCH SINR measured value is controlled the situation of target SINR corresponding to the MCS grade choose higher than current power, again repeat change procedure above, occur in succession several times after this situation, MCS grade just drops to the scope of QPSK, now, because PUSCH SINR measured value is far above target SINR value, cause total generation to lower power control command word, just there will be transmitting power to be transferred to minimum, MCS is also adapted to 0, affects systematic function.

Summary of the invention

The embodiment of the present invention provides target SINR method to set up and device in a kind of PUSCH power control, to improve the performance of communication system.

A target SINR method to set up in the control of PUSCH power, comprising:

Determine the average up PUSCH received power in base station in the last cycle;

According to the average up PUSCH received power in base station in the described last cycle, determine base station expectation received power value;

The target SINR that determines current period in the control of PUSCH power is the difference that described base station expectation received power value deducts up total interference.

A target SINR setting device in the control of PUSCH power, comprising:

Received power determining unit, for determining the average up PUSCH received power in base station in the last cycle;

Expectation power determining unit, for according to the average up PUSCH power determination in base station base station expectation received power value in the described last cycle;

Target SINR determining unit is that described base station expects that the performance number receiving deducts the difference of up total interference for determining that PUSCH power is controlled the target SINR of current period.

The embodiment of the present invention provides target SINR method to set up and device in a kind of PUSCH power control, by the average up PUSCH received power in base station in the last cycle, determine base station expectation received power value, according to base station expectation received power value and up total interference, determine target SINR again, owing to being that the power receiving by base station changes target SINR in real time, so avoided the conflict of a plurality of adjustment processes, and then improved the performance of communication system.

Accompanying drawing explanation

The PUSCH power that Fig. 1 provides for the embodiment of the present invention control in target SINR method to set up flow chart;

The PUSCH power that Fig. 2 provides for the embodiment of the present invention control in target SINR setting device structural representation.

Embodiment

The embodiment of the present invention provides target SINR method to set up and device in a kind of PUSCH power control, by the average up PUSCH received power in base station in the last cycle, determine base station expectation received power value, according to base station expectation received power value and up total interference, determine target SINR again, owing to being that the power receiving by base station changes target SINR in real time, so avoided the conflict of a plurality of adjustment processes, and then improved the performance of communication system.

As shown in Figure 1, target SINR method to set up in the PUSCH power control that the embodiment of the present invention provides, comprising:

Step S101, determine the average up PUSCH received power in base station in the last cycle;

Step S102, according to the average up PUSCH received power in base station in the last cycle, determine base station expectation received power value;

Step S103, determine PUSCH power control in the target SINR of current period be the difference that base station expectation received power value deducts up total interference.

Owing to adjusting the target SINR of current period according to the average up PUSCH received power in the base station in the last cycle, thus the setting of target SINR no longer with MCS rank correlation, avoided the conflict of a plurality of adjustment processes, and then improved the performance of communication system.

Conventionally, determine that in the last cycle, the average up PUSCH received power in base station can be determined by transmitting power and the up path loss of terminal in the last cycle, now, within definite last cycle, before the average up PUSCH received power in base station, also comprise:

Determine that the transmitting power that interior terminal of last cycle sends up PUSCH data on subframe i is:

PSD _{PUSCH_T}(i)＝P _{O_PUSCH}(j)+α(j)·PL _DL

Wherein: suppose, within the last cycle, all up PUSCH transmitted powers are not limited (does not reach the maximum transmission power P that UE allows _cMAX), get Δ _tF(i)=0, in the cycle, the transmitting power of each terminal is just PSD _{pUSCH_T}(i)=P _{o_PUSCH}(j)+α (j) PL _dL, PSD _{pUSCH_T}(i) be the each transmitting power of using up PUSCH to send subframe i corresponding to data of terminal in the last cycle, P _{o_PUSCH}(j) be PUSCH power initial value, α (j) is path loss compensating factor, PL _dLdownlink path loss for terminal measurement.N is that in the cycle, terminal is used up PUSCH to send the total number of times of data.

In the last cycle, the average up PUSCH received power in base station is:

$\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}{\mathrm{PSD}}_{\mathrm{PUSCH}\_R}\left(i\right)=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}({\mathrm{PSD}}_{\mathrm{PUSCH}\_T}\left(i\right)-{\mathrm{PL}}_{\mathrm{UL}})=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}(P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·{\mathrm{PL}}_{\mathrm{DL}}-{\mathrm{PL}}_{\mathrm{UL}}),$

Wherein:

PSD _{pUSCH_R}(i) be the received power of the up PUSCH data that in the last cycle, base station receives on subframe i.

For different base station expectation received power values, determine mode below, in by specific embodiment, PUSCH power being controlled, target SINR method to set up is elaborated:

Embodiment mono-,

In the ideal case, can think up path loss PL _uLwith downlink path loss PL _dLequate, suppose the descending path loss PL of UE side _dLmeasure accurately, and when up PUSCH transmitted power not limited (not reaching the maximum up PUSCH transmitting power allowing), get Δ _tF(i)=0 o'clock, the transmitting PSD of UE was: PSD _{pUSCH_T}(i)=P _{o_PUSCH}(j)+α (j) PL _dL.

The signal power that base station receives is:

PSD _{PUSCH_R}(i)＝PSD _{PUSCH_T}(i)-PL _UL＝P _{O_PUSCH}(j)+(α(j)-1)·PL _UL

Now, can determine that base station expectation received power value equals base station mean receiving power in the last cycle, be the mean value of the difference of the interior up PUSCH transmitting power of terminal of last cycle and up path loss,

${\mathrm{PSD}}_{\mathrm{PUSCH}\_R\_T\arg \mathrm{et}}=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}{\mathrm{PSD}}_{\mathrm{PUSCH}\_R}\left(i\right)=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}({\mathrm{PSD}}_{\mathrm{PUSCH}\_T}\left(i\right)-{\mathrm{PL}}_{\mathrm{UL}});$

$=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}(P_{O\_\mathrm{PUSCH}}\left(j\right)+(\mathrm{\α}\left(j\right)-1)\·{\mathrm{PL}}_{\mathrm{UL}})$

Wherein, PSD _{pUSCH_R_Target}for base station expectation received power value.

Can determine that thus target SINR is:

${\mathrm{SINR}}_{t\arg \mathrm{et}}={\mathrm{PSD}}_{\mathrm{PUSCH}\_R\_T\arg \mathrm{et}}-(I+N)=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}(P_{O\_\mathrm{PUSCH}}\left(j\right)+(\mathrm{\α}\left(j\right)-1)\·{\mathrm{PL}}_{\mathrm{UL}})-(I+N)$

Wherein, up total interference is noise N and system interference tolerance limit IoT sum, wherein:

Noise N is energy and the system noise factor sum in thermal noise (energy on the Hz of unit), system unit RB (Resource Block, Resource Block) frequency domain bandwidth.

System interference tolerance limit IoT can be according to the predefined fixed value of statistics, conventionally by emulation, is added up and is determined, can be also the mean value of all system interference tolerance limit IoT that measure in real time in the last cycle.

Concrete, as thermal noise value-174dBm, when system unit RB frequency domain bandwidth is 180kHz, I+N can be expressed as:

I+N＝(-174dBm/Hz+10*lg(180kHz)+NoiseFigure _up)+IoT _up

Calculate for example NoiseFigure _upbe system noise factor, general value is 7-9dB; IoT _upcorrespondence system jamming margin, object is to control the interference size of this community user to neighbor cell.When ISD=500m, advise IoT _upthe value of working point is about 10dB, and value 10dB herein follow-uply can further revise this value according to the difference of real network or measured value.Therefore, work as NoiseFigure _upwhen value is 7dB, the value of I+N is I+N=-174+52.6+7+10=-104dB.

With P _{o_PUSCH}=-74, α=0.8 is example, works as PL _uLwhen value is respectively 100dB and 80dB, the target SINR calculating is respectively:

SINR _{target_PL100}＝-74+(0.8-1)*100-(-104)＝10dB

SINR _{target_PL80}＝-74+(0.8-1)*80-(-104)＝14dB

Embodiment bis-,

Under non-ideality, can determine base station expectation received power value according to the average up PUSCH received power in base station in the last cycle.

That is, at descending path loss PL _dLmeasure inaccurately, or up-downgoing reciprocity is not strong, when power amplifier has nonlinearity erron, and up path loss PL _uLbe not equal to descending path loss PL _dL, now, the each of eNB side receives that at subframe i the actual reception SINR of up PUSCH data is:

SINR _receiver＝PSD _{PUSCH_R}(i)-(I+N)

＝PSD _{PUSCH_T}(i)-PL _UL-(I+N)

＝(P _{o_PUSCH}(j)+α(j)·PL _DL-PL _UL)-(I+N)

In order to make the reception SINR of eNB side trend towards target SINR, i.e. SINR _receive≈ SINR _targetin up PUSCH power control algorithm, pass through closed loop parameter f (i) rectification error, now, can determine that base station expectation received power value is that the average up PUSCH received power in base station adds the value after the mean value of the closed-loop power control error of statistics in the last cycle in the last cycle, for the mean value of the difference of the up PUSCH transmitting power of terminal in the last cycle and up path loss is added the mean value of the closed-loop power control error of adding up in the last cycle,

${\mathrm{PSD}}_{\mathrm{PUSCH}\_R\_T\arg \mathrm{et}}=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}{\mathrm{PSD}}_{\mathrm{PUSCH}\_R}\left(i\right)+\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}f\left(i\right)$

$=\frac{1}{N}(P_{O\_\mathrm{PUSCH}}\left(j\right)+(\mathrm{\α}\left(j\right)-1)\·{\mathrm{PL}}_{\mathrm{UL}})+\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}f\left(i\right)$

Wherein, PSD _{pUSCH_R_Target}for base station expectation received power value, PSD _{pUSCH_R}(i) be the received power of the up PUSCH data that in the last cycle, base station receives on subframe i, PL _uLfor up path loss, P _{o_PUSCH}(j) be PUSCH power initial value, α (j) is path loss compensating factor, for the mean value of the closed-loop power control error of adding up in the last cycle, f (i) indicates to the PUSCH power of terminal and adjusts state for base station in the last cycle, and N is the upper transmitting of inherent up PUSCH subframe i of last cycle or the number of times that receives signal.

The target SINR of eNB side expectation can be expressed as:

${\mathrm{SINR}}_{t\arg \mathrm{et}}={\mathrm{PSD}}_{\mathrm{PUSCH}\_R\_T\arg \mathrm{et}}-(I+N)=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}(P_{O\_\mathrm{PUSCH}}\left(j\right)+(\mathrm{\α}\left(j\right)-1)\·{\mathrm{PL}}_{\mathrm{UL}})+\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}f\left(i\right)-(I+N)$

Same, up total interference is noise N and system interference tolerance limit IoT sum, wherein:

Noise N is energy and the system noise factor sum in thermal noise (energy on the Hz of unit), system unit RB frequency domain bandwidth.

System interference tolerance limit IoT can be according to the predefined fixed value of statistics, conventionally by emulation, is added up and is determined, can be also the mean value of all system interference tolerance limit IoT that measure in real time in the last cycle.

In two kinds of situations describing, determine that target SINR needs to use up path loss PL in embodiment mono-and embodiment bis- _uL, because base station is not supported by measuring direct acquisition PL _uL, the embodiment of the present invention provides a kind of method that obtains downlink path loss.

Up path loss PL _uLthe poor of the up PUSCH transmitting power of UE and the up PUSCH received power of UE, i.e. PL _uL=P _tX-P _rX

Wherein, the uplink receiving power P of UE _rXcan obtain by base station measurement the uplink transmission power P of UE _tXcan pass through PHR (Power Headroom Report, power space reports) and obtain, terminal to the power headroom of base station feedback is:

PH(i)＝P _CMAX-{10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+α(j)·PL+Δ _TF(i)+f(i)}＝P _CMAX-P _TX [dB]

Hence one can see that, P _tX=P _cMAX-PH (i), and then can determine P _uL=P _cMAX-PH (i)-P _rX.

Wherein, PH (i) is that terminal is to the power headroom of base station feedback, P _cMAXfor the maximum transmission power that terminal allows, P _rXup PUSCH received power for terminal.

When reality is determined target SINR, initial target SINR all can, by hypothesis ideal situation, by the method in embodiment mono-, be used above-mentioned PL _uLcomputational methods are calculated, and obtain initial target SINR; In next cycle, re-use the method in embodiment bis-, introduce the mean value of the closed-loop power control error of statistics in the last cycle obtain base station expectation received power value, calculate target SINR, this target SINR is the target SINR tallying with the actual situation.

The embodiment of the present invention also corresponding provide a kind of PUSCH power control in target SINR setting device, this device can be specially eNodeB (base station), as shown in Figure 2, this device comprises:

Received power determining unit 201, for determining the average up PUSCH received power in base station in the last cycle;

Expectation power determining unit 202, for determining base station expectation received power value according to the average up PUSCH received power in base station in the last cycle;

Target SINR determining unit 203 is that base station expectation received power value deducts the difference after up total interference for determining that PUSCH power is controlled target SINR.

Conventionally, determine that in the last cycle, the average up PUSCH received power in base station can be determined by transmitting power and the up path loss of terminal in the last cycle, now, in this device, also comprise: transmitting power determining unit, for before the average up PUSCH received power in base station, determine that the transmitting power that interior terminal of last cycle sends up PUSCH data on subframe i is in power determining unit is determined the last cycle:

$\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}{\mathrm{PSD}}_{\mathrm{PUSCH}\_T}\left(i\right)=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}(P_{O\_\mathrm{PUSCH}}\left(j\right)+\mathrm{\α}\left(j\right)\·{\mathrm{PL}}_{\mathrm{DL}}),$

Wherein: P _{o_PUSCH}(j) be PUSCH power initial value, α (j) is path loss compensating factor, PL _dLdownlink path loss for terminal measurement.

Corresponding to the technical scheme of embodiment mono-, expectation power determining unit 202 specifically for:

Determine that up path loss equates with downlink path loss;

Determine that base station expectation received power value is the average up PUSCH received power in base station in the last cycle, in the last cycle, the average up PUSCH received power in base station is the mean value of the difference of the interior up PUSCH transmitting power of terminal of last cycle and up path loss,

${\mathrm{PSD}}_{\mathrm{PUSCH}\_R\_T\arg \mathrm{et}}=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}{\mathrm{PSD}}_{\mathrm{PUSCH}\_R}\left(i\right)=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}({\mathrm{PSD}}_{\mathrm{PUSCH}\_T}\left(i\right)-{\mathrm{PL}}_{\mathrm{UL}});$

$=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}(P_{O\_\mathrm{PUSCH}}\left(j\right)+(\mathrm{\α}\left(j\right)-1)\·{\mathrm{PL}}_{\mathrm{UL}})$

Wherein, PSD _{pUSCH_R_Target}for base station expectation received power value, PSD _{pUSCH_R}(i) be the received power of base station on up PUSCH subframe i in the last cycle, PSD _{pUSCH_T}(i) be the transmitting power of terminal on up PUSCH subframe i in the last cycle, PL _uLfor up path loss, P _{o_PUSCH}(j) be PUSCH power initial value, α (j) is path loss compensating factor, and N is the upper transmitting of inherent up PUSCH subframe i of last cycle or the number of times that receives signal.

Corresponding to the technical scheme of embodiment bis-, expectation power determining unit 202 specifically for:

Determine that base station expectation received power value is that the average up PUSCH received power in base station adds the value after the mean value of the closed-loop power control error of statistics in the last cycle in the last cycle, for the mean value of the difference of the up PUSCH transmitting power of terminal in the last cycle and up path loss is added the mean value of the closed-loop power control error of adding up in the last cycle,

${\mathrm{PSD}}_{\mathrm{PUSCH}\_R\_T\arg \mathrm{et}}=\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}{\mathrm{PSD}}_{\mathrm{PUSCH}\_R}\left(i\right)+\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}f\left(i\right);$

$=\frac{1}{N}(P_{O\_\mathrm{PUSCH}}\left(j\right)+(\mathrm{\α}\left(j\right)-1)\·{\mathrm{PL}}_{\mathrm{UL}})+\frac{1}{N}\underset{n=0}{\overset{N}{\mathrm{\Σ}}}f\left(i\right)$

Wherein, PSD _{pUSCH_R_Target}for base station expectation received power value, PSD _{pUSCH_R}(i) be the received power of the up PUSCH data that in the last cycle, base station receives on subframe i, PSD _{pUSCH_T}(i) for terminal in the last cycle sends the transmitting power of up PUSCH data, PL on subframe i _uLfor up path loss, P _{o_PUSCH}(j) be PUSCH power initial value, α (j) is path loss compensating factor, for the statistical value of the closed-loop power control error measured in the last cycle, N is the upper transmitting of inherent up PUSCH subframe i of last cycle or the number of times that receives signal.

Definite method of the up path loss providing according to the embodiment of the present invention, this expectation power determining unit 202 also for:

Determine PL _uLfor: P _uL=P _cMAX-PH (i)-P _rX

Wherein, PH (i) is that terminal is to the power headroom of base station feedback, P _cMAXfor the maximum transmission power that terminal allows, P _rXup PUSCH received power for terminal.

Target SINR determining unit 203 also for:

Determine that up total interference is noise N and system interference tolerance limit IoT sum, wherein:

Noise N is energy and the system noise factor sum in thermal noise (energy on the Hz of unit), system unit RB frequency domain bandwidth.

Target SINR determining unit 203 also for: determine that system interference tolerance limit IoT is:

According to the predefined fixed value of statistics; Or

The average statistics value of all system interference tolerance limit IoT that measure in real time in the last cycle.

The embodiment of the present invention provides target SINR method to set up and device in a kind of PUSCH power control, by the average up PUSCH received power in base station in the last cycle, determine base station expectation received power value, according to base station expectation received power value and up total interference, determine target SINR again, because being changes target SINR in real time by the average up PUSCH received power in base station, so avoided the conflict of a plurality of adjustment processes, and then improved the performance of communication system.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (12)

1. a target SINR method to set up in the control of PUSCH power, is characterized in that, comprising:

Determine base station average ascending physical signal Uplink Shared Channel PUSCH received power in the last cycle;

According to the average up PUSCH received power in base station in the described last cycle, determine base station expectation received power value;

The echo signal of determining current period in the control of PUSCH power is the difference that described base station expectation received power value deducts up total interference with interference plus noise than SINR.

2. the method for claim 1, is characterized in that, within definite last cycle, before the average up PUSCH received power in base station, also comprises:

Determine that in the last cycle, terminal sends the transmitting power of up PUSCH data on subframe i;

Describedly according to the average up PUSCH received power in base station in the described last cycle, determine base station expectation received power value, specifically comprise:

Determine that up path loss equates with downlink path loss;

Determine that base station expectation received power value is the average up PUSCH received power in base station in the last cycle, in the described last cycle, the average up PUSCH received power in base station is the mean value of the difference of the interior up PUSCH transmitting power of terminal of last cycle and up path loss.

3. the method for claim 1, is characterized in that, within definite last cycle, before the average up PUSCH received power in base station, also comprises:

Determine that in the last cycle, terminal sends the transmitting power of up PUSCH data on subframe i;

Describedly according to the average up PUSCH received power in described base station in the last cycle, determine base station expectation received power value, specifically comprise:

Determine that base station expectation received power value is the mean value that the average up PUSCH received power in base station adds the closed-loop power control error of statistics in the last cycle in the last cycle, for the mean value of the difference of the up PUSCH transmitting power of terminal in the last cycle and up path loss is added the mean value of the closed-loop power control error of adding up in the last cycle.

4. method as claimed in claim 3, is characterized in that, also comprises:

Determine that described up path loss is: P _uL=P _cMAX-PH (i)-P _rX

Wherein, PL _uLfor up path loss, PH (i) is that terminal is to the power headroom of base station feedback, P _cMAXfor the maximum transmission power that terminal allows, P _rXuplink receiving power for terminal.

5. the method for claim 1, is characterized in that, also comprises:

Determine that up total interference is noise N and system interference tolerance limit IoT sum, wherein:

Noise N is energy and the system noise factor sum in thermal noise, system unit Resource Block RB frequency domain bandwidth.

6. method as claimed in claim 5, is characterized in that, also comprises: determine that described system interference tolerance limit IoT is specially:

According to the predefined fixed value of statistical value; Or

The assembly average of all system interference tolerance limit IoT that measure in real time in the last cycle.

7. a target SINR setting device in the control of PUSCH power, is characterized in that, comprising:

Received power determining unit, for determining the average up PUSCH received power in base station in the last cycle;

Expectation power determining unit, for according to the average up PUSCH power determination in base station base station expectation received power value in the described last cycle;

Target SINR determining unit is that described base station expects that the performance number receiving deducts the difference of up total interference for determining that PUSCH power is controlled the target SINR of current period.

8. device as claimed in claim 7, is characterized in that, also comprises:

Transmitting power determining unit, before the average up PUSCH received power in base station in described power determining unit is determined the last cycle, determines that in the last cycle, terminal sends the transmitting power of up PUSCH data on subframe i;

Described expectation power determining unit specifically for:

Determine that up path loss equates with downlink path loss; Determine that base station expectation received power value is the average up PUSCH received power in base station in the last cycle, in the described last cycle, the average up PUSCH received power in base station is the mean value of the difference of the interior up PUSCH transmitting power of terminal of last cycle and up path loss.

9. device as claimed in claim 7, is characterized in that, also comprises:

Transmitting power determining unit, before the average up PUSCH received power in base station in described power determining unit is determined the last cycle, determines that in the last cycle, terminal sends the transmitting power of up PUSCH data on subframe i;

Described expectation power determining unit specifically for:

Determine that base station expectation received power value is the mean value that the average up PUSCH received power in base station adds the closed-loop power control error of statistics in the last cycle in the last cycle, for the mean value of the difference of the up PUSCH transmitting power of terminal in the last cycle and up path loss is added the mean value of the closed-loop power control error of adding up in the last cycle.

10. device as claimed in claim 9, is characterized in that, described expectation power determining unit also for:

Determine that described up path loss is: P _uL=P _cMAX-PH (i)-P _rX

Wherein, PL _uLfor up path loss, PH (i) is that terminal is to the power headroom of base station feedback, P _cMAXfor the maximum transmission power that terminal allows, P _rXuplink receiving power for terminal.

11. devices as claimed in claim 7, is characterized in that, described target SINR determining unit also for:

Determine that up total interference is noise N and system interference tolerance limit IoT sum, wherein:

Noise N is energy and the system noise factor sum in thermal noise, system unit RB frequency domain bandwidth.

12. devices as claimed in claim 11, is characterized in that, described target SINR determining unit also for: determine that described system interference tolerance limit IoT is:

According to the predefined fixed value of statistical value; Or

The assembly average of all system interference tolerance limit IoT that measure in real time in the last cycle.