CN102340858A - 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 Frequency Division Multiplexing; OFDM) technology is for carrying out packet data transmission in the basis; When identical networking is adopted in each sub-district, need to carry out power control process and avoid the interference between the sub-district too high, thereby cause systematic function to descend.

According to transmitted power is by transmit leg decision or by recipient's decision, can power control be divided into open Loop Power control and control two types with closed power.Decide the mode of its transmitted power to be called as open Loop Power control based on self to the understanding of channel by transmitting terminal.The benefit of open Loop Power control is not need extra signaling consumption; But shortcoming is a transmitting terminal often deviation with physical presence to the understanding of channel, therefore is inaccurate usually based on channel being familiar with inaccurate open Loop Power control.Determine the mode of the transmitted power of transmitting terminal just to be called as closed power control by the recipient.The benefit of closed power control is that transmitting terminal can decide the transmitted power of transmitting terminal according to its actual received signal quality, and the power adjustment is more accurate; Shortcoming is to need extra signaling consumption.

The UE that describes on the 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 confirmed by formula (1):

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

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

In formula (1), P _{O_PUSCH}(j) be PUSCH power initial value, by the sub-district of 8bit exclusive normalization part P _{O_NOMINAL_PUSCH}(j) and the exclusive part P of the UE of 4bit _{O_UE_PUSCH}(j) sum is formed; Wherein, P _{O_ NOMINAL_PUSCH}(j) (j=0 or 1) and P _{O_UE_PUSCH}(j) (j=0 or 1) is SPS UL-grant (Semi-Persistent Scheduling Uplink-grant, line command on the semi-continuous scheduling), j=0 so by the rrc layer configuration if PUSCH just passes/retransmit corresponding resource; If it is the UL-grant (Uplink-grant, last line command) of dynamic dispatching, j=1 so that PUSCH just passes/retransmit the resource of using.Promptly the PUSCH of dynamic dispatching and the PUSCH of continuous dispatching are used two cover different power Control Parameter; This two covers parameter is respectively through different RRC (Radio Resource Control; Radio Resource control) layer IE (Information Element, information unit) is configured.For re-transmission that inserts Msg3 (Message3, a piece of news in the random access procedure of protocol description) at random or first biography the, j=2, P at this moment _{O_UE_PUSCH}And P (2)=0 _{O_NOMINAL_PUSCH}(2)=P _{O_PRE}+ Δ _{PREAMBLE_Msg3}, Δ P wherein _{O_PRE}And Δ _{PREAMBLE_Msg3}Dispose by rrc layer;

In formula (1), α (j) is the 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 to α ∈, is disposed by the rrc layer signaling.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 expression is adjusted sending PSD (Power Spectrum Density, power spectral density) according to different MCS (Modulation&Coding Scheme, Modulation and Coding Scheme) grade.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, expression disabled state, i.e. K by the exclusive parameter d eltaMCS-Enabled indication of the uplink power control UE that indicates in the RRC signaling _SBe 0; Be configured to en1, expression enabled state, i.e. K _SBe 1.25).And, in the data that PUSCH transmits, there are not UL-SCH (Uplink Shared Channel, Uplink Shared Channel) data, when having only control data, MPR=O _CQI/ N _RE,

Under other situation, then

Wherein, C is the code block number, K _rBe the length of r code block, O _CQIBe to comprise the 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 the corresponding PDCCH (Physical downlink control channel, Physical Downlink Control Channel) of the first transmission of transmission block, obtain;

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

1, opened the power control of accumulated value mode as if the exclusive parameter A ccumulation-enabled of UE, perhaps TPC (Transmission Power Control) command word δ through the rrc layer notice _PUSCHBe included in DCI Format0 (Downlink Control Information Format0; Descending control information format 0) in; And CRC (Cyclic Redundancy Check; CRC) check bit adopts the PDCCH of Temporary C-RNTI (Temporary Cell Radio Network Temporary Identity, interim cell-radio network sign) scrambling, then 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 on the 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, FDD), K _PUSCH=4;

For TDD (Time Division Duplex, time division duplex) UL/DL (Uplink/Downlink, up/descending) configuration 1-6, K _PUSCHValue is seen 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 when being 1, K _PUSCH=7; For the PUSCH transmission of other situation, K _PUSCHProvide by table 1.

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

4) if UE detects the PDCCH of DCI Format0 and DCI Format3/3A simultaneously in same subframe, then UE only uses the TPC order δ that is provided by DCI Format0 _PUSCH

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

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

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

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

9) work as P _{O_UE_PUSCH}During change, perhaps when receiving accidental access response message, (be in synchronously/heavy synchronous regime), the UE that is in following state need reset the accumulation of TPC order.

When 2, not opening the accumulated value mode as if the exclusive parameter A ccumulation-enabled of UE through the rrc layer configuration, UE is in the 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 confirm as follows:

For FDD, K _PUSCH=4;

For TDD UL/DL configuration 1-6, K _PUSCHValue is seen table 1;

For TDD UL/DL configuration 0

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

4) δ under the absolute value mode _PUSCHBy the PDCCH indication with DCI form 0, δ _PUSCHValue is seen table 2; If being SPS activation or SPS, the function of DCI Format0 discharges then δ _PUSCH=0dB.

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

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 _Msg2Be the TPC command word of indicating in the accidental access response message, referring to table 4; Δ P _RampupBy rrc layer configuration, 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

The TPC command word δ of the PUSCH that table 4 is used to dispatch _Msg2

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

Can know through above-mentioned analysis, in formula (1), parameter P _CMAX, P _{O_PUSCH}(J), α (J), Δ _TF(i) and f (i) confirm M by the base station _PUSCH(i) confirm by scheduling.The UE side is according to the descending path loss PL that measures _DLValue with the PUSCH power control relevant parameter that base station side is sent, according to standard code, is confirmed the transmitted power of UE.The UE side belongs to the agreement flow process.

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

The method of confirming up PUSCH power controlled target SINR at present is; Through fixing MCS grade and target SINR (Signal to Interference plus Noise Ratio; Signal to Interference plus Noise Ratio) mapping relations are confirmed target SINR; Promptly respectively in 29 MCS grades, to the corresponding one by one target SINR of different target BLER (Block Error Radio, Block Error Rate) (target BLER normally 1% or 10%); When needs use target SINR, only need to use corresponding MCS grade and target BLER just can confirm target SINR.

Though the method to set up of this PUSCH power controlled target SINR is simple; But because this method is to confirm target SINR's through the mapping relations of fixing MCS grade, target BLER and target SINR; And the various environmental conditions in the practical application are Protean; This method can not be provided with target SINR according to the real network deployment scenario flexibly; Thereby cause easily causing the effect of closed power control not demonstrate fully, be unfavorable for better guaranteeing systematic function because that target SINR is provided with is inaccurate.

Simultaneously; The target SINR that existing scheme is confirmed binds with the MCS grade; And AMC (AdaptiveModulation Coding, Adaptive Modulation and Coding) process, and the CQI makeover process all might be adjusted the MCS grade; Plurality of processes interacts and is easy to occur conflict situations, causes system performance degradation.

For example, during initial power control, PUSCH SINR measured value is higher than the corresponding target SINR of MCS grade that current power control is chosen; Can trigger the transmitting power of TPC command word downward modulation UE; Owing to miss piece, under the effect of CQI correction and AMC, the MCS grade can adjust upward simultaneously.The triple interaction is to certain phase, and the meeting emergent power can't satisfy the situation of the MCS grade performance requirement of selection, causes occurring the mistake piece.Though power control process also can be judged this situation; And trigger the transmitting power that the TPC command word raises UE, but because CQI downward revision ratio is very fast, when waiting TPC command word really to come into force; The MCS grade has been reduced several grades; Often need descend adjusting power according to the come into force corresponding SINR of transmitting power that the back raises and because the corresponding target SINR of the MCS that has reduced after the CQI downward revision compares of TPC command word this moment, follow-up because the speed that the CQI debugging functions are up revised is slower than the speed of power control downward modulation transmitting power; So whole structure is the MCS grade compares several grades that descended when initial, UE transmitted power several dB that also descended.When occurring PUSCH SINR measured value once more and be higher than the situation of the corresponding target SINR of MCS grade that current power control chooses, repeat the change procedure of front once more, this several times situation takes place in succession after; The MCS grade just drops to the scope of QPSK; Transmitting power will occur and be transferred to minimum because PUSCH SINR measured value far above target SINR value, causes gross output to give birth to adjusting power control command word this moment; MCS also is adapted to 0, influences systematic function.

Summary of the invention

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

Target SINR method to set up in a kind of PUSCH power control comprises:

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

Confirm the base station expectation received power value according to the average up PUSCH received power in base station in the said last cycle;

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

Target SINR setting device in a kind of PUSCH power control comprises:

Received power is confirmed the unit, is used for confirming the average up PUSCH received power in base station in the last cycle;

The expectation power determining unit is used for confirming the base station expectation received power value according to the average up PUSCH power in base station in the said last cycle;

Target SINR confirms the unit, is used for confirming that the target SINR of PUSCH power control current period is that said base station expects that the performance number that receives deducts the difference of up total interference.

The embodiment of the invention provides target SINR method to set up and device in a kind of PUSCH power control; Confirm the base station expectation received power value through the average up PUSCH received power in base station in the last cycle; Determine target SINR according to base station expectation received power value and up total interference again; Since be the power real time altering target SINR that receives through the base station, thus the conflict of a plurality of adjustment processes avoided, and then improved the performance of communication system.

Description of drawings

Target SINR method to set up flow chart during the PUSCH power that Fig. 1 provides for the embodiment of the invention is controlled;

Target SINR setting device structural representation during the PUSCH power that Fig. 2 provides for the embodiment of the invention is controlled.

Embodiment

The embodiment of the invention provides target SINR method to set up and device in a kind of PUSCH power control; Confirm the base station expectation received power value through the average up PUSCH received power in base station in the last cycle; Determine target SINR according to base station expectation received power value and up total interference again; Since be the power real time altering target SINR that receives through the base station, thus the conflict of a plurality of adjustment processes avoided, 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 invention provides comprises:

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

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

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

Owing to adjust 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 the MCS rank correlation, avoided the conflict of a plurality of adjustment processes, and then improved the performance of communication system.

Usually, confirm that the average up PUSCH received power in base station can be confirmed through the transmitting power and the up path loss at terminal in the last cycle in the last cycle, at this moment, in definite last cycle, before the average up PUSCH received power in base station, also comprise:

Confirm that up PUSCH data are sent at interior terminal of last cycle on subframe i transmitting power is:

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

Wherein: suppose that all up PUSCH transmitted powers are not limited in the last cycle (does not promptly reach the maximum transmission power P that UE allows _CMAX), get Δ _TF(i)=0, then the transmitting power at interior each terminal of cycle is PSD just _{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 the corresponding subframe i of data in terminal in the last cycle, P _{O_PUSCH}(j) be PUSCH power initial value, α (j) is the path loss compensating factor, PL _DLDownlink path loss for the terminal measurement.N is that the terminal uses up PUSCH to send the total number of times of data in the cycle.

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

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

Wherein:

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

Confirm mode to the different base stations expectation received power value below, target SINR method to set up in the control of PUSCH power be elaborated through specific embodiment:

Embodiment one,

In the ideal case, can think up path loss PL _ULWith downlink path loss PL _DLEquate, promptly suppose the descending path loss PL of UE side _DLMeasure accurately, and when up PUSCH transmitted power not limited (promptly not reaching the maximum up PUSCH transmitting power that allows), get Δ _TF(i)=0 o'clock, then the emission PSD of UE is: PSD _{PUSCH_T}(i)=P _{O_PUSCH}(j)+α (j) PL _DL

The signal power that the base station receives is:

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

At this moment, can confirm that the base station expectation received power value equals base station mean receiving power in the last cycle, be the mean value of the difference of interior up PUSCH transmitting power in terminal of last cycle and up path loss, promptly

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

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

Wherein, PSD _{PUSCH_R_Target}Be the base station expectation received power value.

Can confirm 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 on thermal noise (energy on the Hz of unit), system unit RB (Resource Block, the Resource Block) frequency domain bandwidth.

System interference tolerance limit IoT can be according to the predefined fixed value of statistics, confirms through the emulation statistics usually, and also can be 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 was 180kHz, I+N can be expressed as:

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

Calculate NoiseFigure for example _UpBe system noise factor, general value is 7-9dB; IoT _UpCorresponding system interference tolerance limit, purpose are the interference size of this community user of control to neighbor cell.Suggestion IoT when ISD=500m _UpThe value of working point is about 10dB, value 10dB here, follow-up can be according to different these values of further revising of real network or measured value.Therefore, work as NoiseFigure _UpWhen value was 7dB, the value of I+N was I+N=-174+52.6+7+10=-104dB.

With P _{O_PUSCH}=-74, α=0.8 is an example, works as PL _ULWhen value was 100dB and 80dB respectively, the target SINR that calculates was respectively:

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

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

Embodiment two,

Under non-ideality, can confirm the 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 the 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, at this moment, 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)

For the reception SINR that makes the eNB side trends towards target SINR, i.e. SINR _Receive≈ SINR _TargetIn up PUSCH power control algorithm, pass through closed loop parameter f (i) rectification error; At this moment; Can confirm that the base station expectation received power value is that the average up PUSCH received power in base station adds the value behind 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 up PUSCH transmitting power in 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, promptly

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

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

Wherein, PSD _{PUSCH_R_Target}Be base station expectation received power value, PSD _{PUSCH_R}(i) be the received power of the up PUSCH data that the base station receives in the last cycle on subframe i, PL _ULBe up path loss, P _{O_PUSCH}(j) be PUSCH power initial value, α (j) is the path loss compensating factor, Be the mean value of the closed-loop power control error of adding up in the last cycle, f (i) indicates the PUSCH power adjustment state to the terminal for base station in the last cycle, and N is that inherent up PUSCH subframe i of last cycle goes up emission or receives the number of times of signal.

Then eNB side desired destination SINR 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 on thermal noise (energy on the Hz of unit), the system unit RB frequency domain bandwidth.

System interference tolerance limit IoT then can be according to the predefined fixed value of statistics, confirms through the emulation statistics usually, and also can be the mean value of all system interference tolerance limit IoT that measure in real time in the last cycle.

Under two kinds of situation in embodiment one and embodiment two, describing, confirm that target SINR need use up path loss PL _UL, because the base station is not supported through measuring direct acquisition PL _UL, the embodiment of the invention provides a kind of method that obtains the downlink path loss.

Up path loss PL _ULBe up PUSCH received power poor of up PUSCH transmitting power and the UE of UE, i.e. PL _UL=P _TX-P _RX

Wherein, the up received power P of UE _RXThe uplink transmission power P of UE can be obtained through base station measurement _TXCan pass through PHR (Power Headroom Report, power space reports) and obtain, the 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 confirm P _UL=P _CMAX-PH (i)-P _RX

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

When reality was confirmed target SINR, initial target SINR all can through the method among the embodiment one, use above-mentioned PL through the hypothesis ideal situation _ULComputational methods are calculated, and obtain initial target SINR; Re-use the method among the embodiment two in following one-period, introduce the mean value of the closed-loop power control error of statistics in the last cycle

Obtain the base station expectation received power value, calculate target SINR, this target SINR is the target SINR that tallies with the actual situation.

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

Received power is confirmed unit 201, is used for confirming the average up PUSCH received power in base station in the last cycle;

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

Target SINR confirms unit 203, is used for confirming that PUSCH power control target SINR is the difference after the base station expectation received power value deducts up total interference.

Usually; Confirm that the average up PUSCH received power in base station can be confirmed through the transmitting power and the up path loss at terminal in the last cycle in the last cycle; At this moment; Also comprise in this device: transmitting power is confirmed the unit, is used in power determining unit is confirmed the last cycle, before the average up PUSCH received power in base station, confirming that up PUSCH data are sent at interior terminal of last cycle on subframe i transmitting power is:

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

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

Corresponding to the technical scheme of embodiment one, expectation power determining unit 202 specifically is used for:

Confirm that the up path loss equates with the downlink path loss;

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

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

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

Wherein, PSD _{PUSCH_R_Target}Be 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 _ULBe up path loss, P _{O_PUSCH}(j) be PUSCH power initial value, α (j) is the path loss compensating factor, and N is the number of times that inherent up PUSCH subframe i of last cycle goes up emission or reception signal.

Corresponding to the technical scheme of embodiment two, expectation power determining unit 202 specifically is used for:

Confirm that the base station expectation received power value is that the average up PUSCH received power in base station adds the value behind 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 up PUSCH transmitting power in 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, promptly

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

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

Wherein, PSD _{PUSCH_R_Target}Be base station expectation received power value, PSD _{PUSCH_R}(i) be the received power of the up PUSCH data that the base station receives in the last cycle on subframe i, PSD _{PUSCH_T}(i) be the transmitting power that up PUSCH data are sent at the terminal in the last cycle on subframe i, PL _ULBe up path loss, P _{O_PUSCH}(j) be PUSCH power initial value, α (j) is the path loss compensating factor,

Be the statistical value of the closed-loop power control error measured in the last cycle, N is that inherent up PUSCH subframe i of last cycle goes up emission or receives the number of times of signal.

Definite method of the up path loss that provides according to the embodiment of the invention, this expectation power determining unit 202 also is used for:

Confirm PL _ULFor: P _UL=P _CMAX-PH (i)-P _RX

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

Target SINR confirms that unit 203 also is used for:

Confirm 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 on thermal noise (energy on the Hz of unit), the system unit RB frequency domain bandwidth.

Target SINR confirms that unit 203 also is used for: confirm that system interference tolerance limit IoT is:

According to the predefined fixed value of statistics; Perhaps

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

The embodiment of the invention provides target SINR method to set up and device in a kind of PUSCH power control; Confirm the base station expectation received power value through the average up PUSCH received power in base station in the last cycle; Determine target SINR according to base station expectation received power value and up total interference again; Since be through the average up PUSCH received power real time altering target SINR in base station, thus the conflict of a plurality of adjustment processes avoided, and then improved the performance of communication system.

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

Claims (12)

1. target SINR method to set up during a PUSCH power is controlled is characterized in that, comprising:

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

Confirm the base station expectation received power value according to the average up PUSCH received power in base station in the said last cycle;

The echo signal of confirming current period in the control of PUSCH power is the difference that said 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, in definite last cycle, before the average up PUSCH received power in base station, also comprises:

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

Saidly confirm the base station expectation received power value, specifically comprise according to the average up PUSCH received power in base station in the said last cycle:

Confirm that the up path loss equates with the downlink path loss;

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

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

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

Saidly confirm the base station expectation received power value, specifically comprise according to the average up PUSCH received power in said base station in the last cycle:

Confirm that the 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, add the mean value of the closed-loop power control error of adding up in the last cycle for the mean value of the difference of up PUSCH transmitting power in terminal in the last cycle and up path loss.

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

Confirm that said up path loss is: P _UL=P _CMAX-PH (i)-P _RX

Wherein, PL _ULBe the up path loss, PH (i) is the power headroom of terminal to base station feedback, P _CMAXBe the maximum transmission power that the terminal allows, P _RXUp received power for the terminal.

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

Confirm 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 on thermal noise, the system unit Resource Block RB frequency domain bandwidth.

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

According to the predefined fixed value of statistical value; Perhaps

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

7. target SINR setting device during a PUSCH power is controlled is characterized in that, comprising:

Received power is confirmed the unit, is used for confirming the average up PUSCH received power in base station in the last cycle;

The expectation power determining unit is used for confirming the base station expectation received power value according to the average up PUSCH power in base station in the said last cycle;

Target SINR confirms the unit, is used for confirming that the target SINR of PUSCH power control current period is that said base station expects that the performance number that receives deducts the difference of up total interference.

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

Transmitting power is confirmed the unit, is used in said power determining unit is confirmed the last cycle before the average up PUSCH received power in base station, confirms that terminal in the last cycle sends the transmitting power of up PUSCH data on subframe i;

Said expectation power determining unit specifically is used for:

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

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

Transmitting power is confirmed the unit, is used in said power determining unit is confirmed the last cycle before the average up PUSCH received power in base station, confirms that terminal in the last cycle sends the transmitting power of up PUSCH data on subframe i;

Said expectation power determining unit specifically is used for:

Confirm that the 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, add the mean value of the closed-loop power control error of adding up in the last cycle for the mean value of the difference of up PUSCH transmitting power in terminal in the last cycle and up path loss.

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

Confirm that said up path loss is: P _UL=P _CMAX-PH (i)-P _RX

Wherein, PL _ULBe the up path loss, PH (i) is the power headroom of terminal to base station feedback, P _CMAXBe the maximum transmission power that the terminal allows, P _RXUp received power for the terminal.

11. device as claimed in claim 7 is characterized in that, said target SINR confirms that the unit also is used for:

Confirm 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 on thermal noise, the system unit RB frequency domain bandwidth.

12. device as claimed in claim 11 is characterized in that, said target SINR confirms that the unit also is used for: confirm that said system interference tolerance limit IoT is:

According to the predefined fixed value of statistical value; Perhaps

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

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