CN102368868B - Method for optimizing physical uplink control channel power control - Google Patents

Abstract

The invention discloses a method for optimizing physical uplink control channel power control. In a closed loop adjusting process, only according to results of PUCCH (physical uplink control channel) 'missing detection', 'false detection' and 'correct detection', setting a transmission power control (TPC) command word is carried out, or according to the results of the PUCCH 'missing detection', 'false detection' and 'correct detection' and according to a comparison result between an SINR measured value and an object value, setting the TCP command word is carried out. In an outer loop adjusting process, setting and adjusting a plurality of parameters are combined and optimized, after being reset, a closed loop cumulant can be rapidly converged, PUCCH transmission performance is raised, PUCCH power resource utilization is optimized, and raising PDSCH (physical downlink shared channel) transmission performance is facilitated further.

Description

A kind of method of optimizing the control of physical uplink control channel power

Technical field

The present invention relates to the mobile communication technology field, particularly relate to a kind of method of optimizing the control of physical uplink control channel PUCCH power.

Background technology

LET (Long Term Evolution, Long Term Evolution) is third generation partner program (3GPP) standard, is the hot spot technology of present moving communicating field.During the up PUCCH of LTE transmission, be the transmission quality that guarantees PUCCH, reduce the power consumption of UE simultaneously and to the interference of adjacent area, need carry out power control to PUCCH.

The PUCCH power expression of LTE is as follows:

P _PUCCH(i)＝min{P _CMAX，P _{O_PUCCH}+PL+h(n _CQI，n _HARQ)+Δ _{F_PUCCH}(F)+g(i)}

P _CMAXThe maximum transmission power corresponding with the terminal power grade for 3GPP RAN4 definition;

P _{O_OUCCH}Be the expectation received power of PUCCH form 1a, it is following two parts sum: P _{O_NOMINAL_PUCCH}(the exclusive part in residential quarter), P _{O_UE_PUCCH}(the exclusive part of UE) is respectively cell-level and UE level parameter;

PL is the downlink path loss that UE measures;

Wherein, PUCCH form 2/2a/2b is that benchmark carries out Δ to send broadband CQI feedback (4bit) _{F_PUCCH}(F) setting when feedack exceeds 4bit (as subband CQI feedback, feed back PMI simultaneously, perhaps with the ACK/NACK combined coding etc.), will be added a side-play amount h (n in addition _CQI, n _HARQ);

PUCCH has multiple form, Δ _{F_PUCCH}(F) for the relevant power adjustment of PUCCH form, be defined as every kind of PUCCH type with respect to the power bias of benchmark PUCCH form (PUCCH form 1a);

Under the tdd mode, to same sub-frame of uplink, may send the TPC command word at a plurality of descending sub frames, at this moment need all power control commands δ _PUCCHAdd up, be presented as g (i).

In the prior art, carry out the closed power adjustment based on SINR, its algorithm following (being labeled as algorithm 1):

According to the characteristics of PUCCH power setting as can be known, closed loop still can adopt tradition to measure and desired value method relatively based on SINR, and the datum target value SINR of PUCCH form 1a transmission namely is set _{Target, PUCCH}, then normalization measured value and its are compared, produce the TPC command word.

Closed loop procedure:

SINR _{PUCCH, M1-base}: SINR is measured in the normalization of this PUCCH transmission;

SINR _{Target, PUCCH}: the target SINR of PUCCH transmission;

Compare SINR _{PUCCH, M1-base}With SINR _{Target, PUCCH}, produce the TPC order;

In the current realization, the closed loop of PUCCH compares judgement based on the SINR of algorithm 1 usually, and for P _{O_PUCCH}, Δ _{F_PUCCH}(F), do not carry out the outer shroud adjustment.Because P _{O_UE_PUCCH}During parameter change, dynamic accumulative amount g (i) can reset, and like this, works as P _{O_NOMINAL_PUCCH}, P _{O_UE_PUCCH}Arrange unreasonable and g (i) accumulation when very big, need the long period to restrain again after the replacement, this influence the effect that power is controlled, and further influences the performance of PUCCH; When PUCCH goes up transmission ACK/NACK, more can have influence on the efficient of PDSCH transmission.

Summary of the invention

The objective of the invention is to overcome the shortcoming of prior art, solve and how to carry out the power control of PUCCH according to the transmission information of PUCCH, and the adjustment of each parameter of combined optimization and setting, to optimize the control of PUCCH power, improve the ascending power efficiency of resource, and further improve the efficiency of transmission of descending PDSCH.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides a kind of method of optimizing the control of physical uplink control channel power, comprise: in the closed loop adjustment process, only the result according to physical uplink control channel PUCCH " omission ", " flase drop " and " the correct detection " carries out the setting of through-put power control TPC command word; Perhaps according to the result of PUCCH " omission ", " flase drop " and " the correct detection ", and according to the comparative result of SINR measured value and desired value, carry out the setting of TPC command word;

Wherein " omission " refer to because PUCCH transmission quality former thereby cause eNB not detect; " flase drop " refers to that eNB detects but the demodulation mistake, and for the correct situation of demodulation, then is " the correct detection ".

Said method provided by the invention also comprises the outer shroud adjustment process, and the PUCCH power expression is as follows:

P _PUCCH(i)＝min{P _CMAX，P _{O_PUCCH}+PL+h(n _CQI，n _HARQ)+Δ _{F_PUCCH}(F)+g(i)}

PCMAX is the maximum transmission power corresponding with the terminal power grade of 3GPP RAN4 definition;

P _{O_PUCCH}Be the expectation received power of PUCCH form 1a, it is following two parts sum: P _{O_NOMINAL_PUCCH}, P _{O_UE_PUCCH}, P wherein _{O_NOMINAL_PUCCH}, P _{O_UE_PUCCH}Be respectively cell-level and UE level parameter;

PL is the downlink path loss that UE measures;

Wherein, PUCCH form 2/2a/2b is fed back to benchmark and carries out Δ to send broadband CQI _{F_PUCCH}(F) setting will be added a side-play amount h (n in addition when feedack exceeds 4bit _CQI, n _HARQ);

PUCCH has multiple form, Δ _{F_PUCCH}(F) for the relevant power adjustment of PUCCH form, be defined as every kind of PUCCH type with respect to the power bias of benchmark PUCCH form, wherein benchmark PUCCH form is PUCCH form 1a;

Under the TDD pattern, to same sub-frame of uplink, may send the TPC command word at a plurality of descending sub frames, at this moment need all power control commands δ _PUCCHAdd up, be presented as g (i);

In the outer shroud adjustment process, to three parameter P _{O_UE_PUCCH}, Δ _{F_PUCCH}(F), P _{O_NOMINAL_PUCCH}Carry out the combined optimization adjustment, wherein according to P _{O_UE_PUCCH}Adjustment amount to Δ _{F_PUCCH}(F) and P _{O_NOMINAL_PUCCH}Adjust, and certain measurement adjustment time is set and adjusts thresholding, then carry out the adjustment setting of power after satisfying condition.

By as seen above-mentioned, relative prior art, this invention has considered that the factor of PUCCH " omission " " flase drop " " the correct detection " carries out the closed power adjustment, and combined optimization P _{O_UE_PUCCH}, P _{O_NOMINAL_PUCCH}, Δ _{F_PUCCH}(F) parameter setting and adjustment can restrain after the closed loop cumulant is reset fast, have improved the PUCCH transmission performance, have optimized the utilization of PUCCH power resource, and further have been conducive to improve descending PDSCH transmission performances.

Description of drawings

Fig. 1 is the block diagram of technical solution of the present invention.

Embodiment

In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with specific embodiment.

As shown in Figure 1, the PUCCH Poewr control method that the present invention proposes comprises the closed loop adjustment process, in described closed loop adjustment process, only the result according to physical uplink control channel PUCCH " omission ", " flase drop " and " the correct detection " carries out the setting of through-put power control TPC command word; Perhaps according to the result of PUCCH " omission ", " flase drop " and " the correct detection ", and according to the comparative result of SINR measured value and desired value, carry out the setting of TPC command word;

Wherein " omission " refer to because PUCCH transmission quality former thereby cause eNB not detect; " flase drop " refers to that eNB detects but the demodulation mistake, and for the correct situation of demodulation, then is " the correct detection ".

The PUCCH Poewr control method that the present invention proposes also comprises the outer shroud adjustment process, and the PUCCH power expression is as follows:

P _PUCCH(i)＝min{P _CMAX，P _{O_PUCCH}+PL+h(n _CQI，n _HARQ)+Δ _{F_PUCCH}(F)+g(i)}

PCMAX is the maximum transmission power corresponding with the terminal power grade of 3GPP RAN4 definition;

P _{O_PUCCH}Be the expectation received power of PUCCH form 1a, it is following two parts sum: P _{O_NOMINAL_PUCCH}, P _{O_UE_PUCCH}, P wherein _{O_NOMINAL_PUCCH}, P _{O_UE_PUCCH}Be respectively cell-level and UE level parameter;

PL is the downlink path loss that UE measures;

Wherein, PUCCH form 2/2a/2b is fed back to benchmark and carries out Δ to send broadband CQI _{F_PUCCH}(F) setting will be added a side-play amount h (n in addition when feedack exceeds 4bit _CQI, n _HARQ);

PUCCH has multiple form, Δ _{F_PUCCH}(F) for the relevant power adjustment of PUCCH form, be defined as every kind of PUCCH type with respect to the power bias of benchmark PUCCH form, wherein benchmark PUCCH form is PUCCH form 1a;

Under the TDD pattern, to same sub-frame of uplink, may send the TPC command word at a plurality of descending sub frames, at this moment need all power control commands δ _PUCCHAdd up, be presented as g (i);

In the outer shroud adjustment process, to three parameter P _{O_UE_PUCCH}, Δ _{F_PUCCH}(F), P _{O_NOMINAL_PUCCH}Carry out the combined optimization adjustment, wherein according to P _{O_UE_PUCCH}Adjustment amount to Δ _{F_PUCCH}(F) and P _{O_NOMINAL_PUCCH}Adjust, and certain measurement adjustment time is set and adjusts thresholding, then carry out the adjustment setting of power after satisfying condition.

Its specific embodiments is as follows:

One, closed power adjustment

Algorithm 2: reach " flase drop " based on " omission "

When eNB can not receive PUCCH ACK/NACK, two kinds of situations are arranged: a kind of UE of being receives the PUCCH A/N poor quality who launches behind the PDCCH, causes eNB not detect or detect mistake; Do not detect PDCCH or detect the PDCCH decoding error but another kind is UE, at this moment UE does not receive PDSCH and does not feed back PUCCHA/N information yet, causes eNB can't receive PUCCH.

The influence of two kinds of situations is different: for the 1st kind of situation, need raise the PUCCH transmitting power and guarantee the PUCCH quality of reception in TPC command word subsequently; For the 2nd kind of situation, do not have obvious relation with the PUCCH transmitting power, but because eNB can't judge the detection case of the PDCCH of UE, advise that its processing is with the 1st kind of situation.

Further consider, PUCCH A/N poor quality and cause eNB not detect, this situation is " omission ", illustrates that at this moment transmitting power is too small, needs big step-length to improve transmitting power; And eNB detects PUCCH but the demodulation mistake, and this then is " flase drop ", at this moment only needs less step-length to improve transmitting power; And for the correct situation of demodulation, then be " just examining ", at this moment can less step-length reduce transmitting power.

And for PUCCH transmission periodicity channel condition information (CSI), UE always carries out data and sends, and is same, and eNB can carry out corresponding power adjustment according to " omission " " flase drop " reception condition that detects.

Closed loop procedure:

PUCCH is " omission ", then Δ δ _PUCCH=Δ _LargeUp

PUCCH is " flase drop ", then Δ δ _PUCCH=Δ _SmallUp

PUCCH is " just examining ", then Δ δ _PUCCH=Δ _StepDown

Δ wherein _LargeUp〉=Δ _SmallUp

For DCI (Downlink Control Information, down link control information) form 1/1A/1B/1D/2/2A/2B/3, suggestion:

Δ _LargeUp＝3dB；

Δ _SmallUp＝1dB；

Δ _StepDown＝-0.01dB；

And for DCI form 3A, then advise Δ _LargeUp=Δ _SmallUp=1dB, Δ _StepDown=-0.01dB.

Because TPC command word δ _PUCCHOnly can represent the power adjustment of integral multiple, for Δ _StepDown=-0.01dB adjusts the not enough 1dB of step-length, needs equally to carry out power decreasing again after a plurality of step-lengths of accumulation.

Algorithm 3: combined optimization

Combined optimization, namely consider algorithm 1 and algorithm 2 simultaneously, also namely according to the result of PUCCH " omission ", " flase drop " and " correct detection ", and according to the comparative result of SINR measured value and desired value, carry out the setting of TPC command word, concrete realization can have dual mode:

Option 1: algorithm 1 and algorithm 2 independent judgment separately, get both bigger adjustment step values then as the conclusive judgement value, specific as follows: the comparative result according to SINR measured value and desired value arranges the first adjustment step value, result according to PUCCH " omission ", " flase drop " and " the correct detection " arranges the second adjustment step value, get first final step value, i.e. the Δ δ of adjusting of higher value conduct that adjusts in step value and the second adjustment step value _PUCCH=MAX (Δ δ _{PUCCH, algorithm 1}, Δ δ _{PUCCH, algorithm 2});

Option 2: on the basis that algorithm 1 is adjusted, revise according to algorithm 2, the conclusive judgement value is both adjustment amount sums, specific as follows: the comparative result according to SINR measured value and desired value arranges the first adjustment step value, result according to PUCCH " omission ", " flase drop " and " the correct detection " arranges the second adjustment step value, get first adjust step value and second adjust step value and as final step value, i.e. the Δ δ of adjusting _PUCCH=Δ δ _{PUCCH, algorithm 1}+ Δ δ _{PUCCH, algorithm 2}

Concrete calculating repeats no more.

Two, exterior ring power adjustment

Since the effective range difference of parameter, so the mode that outer ring statistics is adjusted is also different:

P _{O_NOMINAL_PUCCH}: the cell-level parameter, the adjustment result who adds up all UE adjusts;

P _{O_UE_PUCCH}: UE level parameter, add up the PUCCH transmission of this UE demand form and adjust;

Δ _{F_PUCCH}(F): PUCCH form level parameter, add up the transmission of the identical PUCCH form of this UE and adjust.

P _{O_UE_PUCCH}The adjustment mode:

Initial value arranges: P _{O_UE_PUCCH}Initial value is made as 0.

Updating value is calculated:

Measure measurement period at each, according to the accumulation Δ SINR that upgrades _PUCCHValue is calculated the P that upgrades _{O_UE_PUCCH}Wherein, Δ SINR _PUCCHFor outer shroud is adjusted SINR _{Target, PUCCH}Adjustment amount, adopt the method for fixed window or movable window statistics BLER, repeat no more.

Sample as for statistics is selected, and eNB can know and knows PUSCH, the delivery time of PUCCH CSI, the PUCCH A/N relevant with PDSCH etc. periodically, can't predict the delivery time of PUCCH SR; Add up PUCCH form 1 in the time of to get rid of single-shot SR so outer shroud is measured, but when SR+ACK/NACK was concurrent, A/N sent in the SR resource, at this moment need add up interior.

During realization, two kinds of numerical statistic scopes can be arranged:

Option 1: only add up PUCCH form 1a;

Option 2: add up other PUCCH form of non-SR transmission, comprise 1a/1b/2/2a/2b etc.;

The interval of simple dynamic dispatching is unfixing, only adds up form 1a, and effect may be relatively poor; And in conjunction with measurement period CSI feedback, can improve the tracking to channel, so Option 2 is adopted in suggestion.

P after the quantification _{O_UE_PUCCH}Span be [8,7], according to not quantizing P _{O_UE_PUCCH}Value, choose immediate value in above-mentioned 16 values.As non-quantized twice P _{O_UE_PUCCH}Value differs not enough threshold value Δ P _{O_UE_PUCCH, thr}, namely

The time, do not carry out P _{O_UE_PUCCH}Adjustment; Otherwise, then carry out P _{O_UE_PUCCH}Renewal, realize by the RRC signaling.

Δ P _{O_UE_PUCCH, thr}The speed that value need be considered the expense of RRC signaling reprovision and the back power control of resetting restrains again: Δ P _{O_UE_PUCCH, thr}More big, signaling consumption is approximately little, but cumulant is bigger, and the convergence rate after the replacement is longer; Otherwise, Δ P _{O_UE_PUCCH, thr}More little, then signaling consumption is more big, but cumulant is less, and the convergence rate after the replacement is very fast.

P _{O_UE_PUCCH}Update cycle T _{O_UE_PUCCH}, be SINR _{Target, PUCCH}Update cycle T _BLERIntegral multiple.At P _{O_UE_PUCCH}Updated time is carried out according to last joint earlier

Renewal calculate, and then calculate P _{O_UE_PUCCH}Updating value.

P _{O_NOMINAL_PUCCH}The adjustment mode:

Initial value arranges:

P _{O_NOMINAL_PUCCH}Initial value is made as SINR _{Target, PUCCH, ini}+ IN _Null(dBm).SINR wherein _{Target, PUCCH, ini}For the corresponding SINR value of PUCCH form 1a under target BLER, obtain by link simulation; IN _NullNetwork measure obtains during for the residential quarter zero load interference and noise value.

Annotate: to PUCCH, IN _NullOnly add up PUCCH PRB (Physical Resource Block, Physical Resource Block) part, need carry out the time-frequency two-dimensional recursive average computation equally.

Updating value is calculated:

Add up the P of each UE _{O_UE_PUCCH}Parameter reaches the number in span lower bound and the upper bound respectively, is labeled as N _{UE, LL}, N _{UE, HL}

Work as N _{UE, LL}, N _{UE, HL}Be not 0 o'clock simultaneously, if

Perhaps The time, then upgrade Δ P _{O_NOMINAL_PUCCH}=10lg (R _{UE, thd}), wherein, R _{UE, thd}Be positive integer, suggestion value 2-4.

Work as N _{UE, LL}, N _{UE, HL}Be 0 o'clock simultaneously, do not carry out P _{O_NOMINAL_PUCCH}Upgrade;

Work as N _{UE, LL}, N _{UE, HL}In any is 0 o'clock, surpass if the UE number that reaches the span lower bound accounts for total UE ratio

Δ P then _{O_NOMINAL_PUCCH}=-10lg (R _{UE, thd}), perhaps

Accounting for total UE number ratio as if the UE number that reaches the span upper bound surpasses

Δ P then _{O_NOMINAL_PUCCH}=10lg (R _{UE, thd}), perhaps ${\mathrm{\ΔP}}_{O\_\mathrm{NOMINAL}\_\mathrm{PUCCH}}=10\·\lg \left(\frac{6}{R_{\mathrm{UE},\mathrm{thd}}}\right);$

P after the renewal _{O_NOMINAL_PUCCH}=P _{O_NOMINAL_PUCCH}+ Δ P _{O_NOMINAL_PUCCH}

Simultaneously each UE is upgraded P _{O_UE_PUCCH}=P _{O_UE_PUCCH}-Δ P _{O_NOMINAL_PUCCH}

P _{O_NOMINAL_PUCCH}Span be [127 ,-96] dbm because the PRB occupied bandwidth of PUCCH is less, it selects fading characteristic more relevant frequently, N occurs _{UE, LL}, N _{UE, HL}Simultaneously be not that 0 probability is lower.

P _{O_NOMINAL_PUCCH}Update cycle T _{O_NOMINAL_PUCCH}, be P _{O_UE_PUCCH}Update cycle T _{O_UE_PUCCH}Integral multiple; At P _{O_NOMINAL_PUCCH}Updated time is carried out P according to last joint earlier _{O_UE_PUCCH}Renewal calculate, and then calculate P _{O_NOMINAL_PUCCH}And P _{O_UE_PUCCH}Upgrade, thereby obtain final P _{O_UE_PUCCH}Updating value.

Δ _{F_PUCCH}The adjustment mode:

Δ _{F_PUCCH}(F) be presented as the PUCCH different transpost formats with respect to the side-play amount of form 1a, so its outer shroud adjustment also should be based on adding up with a kind of transformat:

For PUCCH form 1:

For the SR transmission, the same A/N of its transmission plan gets final product but only need satisfy activation detection (i.e. the detection of " omission "), does not need further to judge and corrects errors.

The SR resource is UE level cycle reserved resource, whether sends service buffer situation and synchronous regime that SR depends on UE, and eNB can't predict the transmission of SR.

Suggestion:

For form 1, its transmitted power is with form 1a, i.e. Δ _{F_PUCCH}(1)=0dB.

For PUCCH form 1b:

Initial value arranges:

Δ _{F_PUCCH}(1b) _ini＝3dB。

Updating value is calculated:

Each measures statistic period T _BLERIn, calculate the BLER of PUCCH form 1b, and obtain accumulating adjustment amount

Δ SINR wherein _{PUCCH, 1b}Outer shroud adjustment amount for the target SINR of PUCCH form 1b transmission;

${\mathrm{\Δ\Δ}}_{F\_\mathrm{PUCCH}}\left(1b\right)=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}{\mathrm{\ΔSINR}}_{\mathrm{PUCCH},1b}-P_{O\_\mathrm{UE}\_\mathrm{PUCCH}};$

Δ _{F_PUCCH}(1b)＝Δ _{F_PUCCH}(1b) _ini+ΔΔ _{F_PUCCH}(1b)；

Δ _{F_PUCCH}(1b) span is [1,3,5] dB, is spaced apart 2dB.

Equally, according to not quantizing Δ _{F_PUCCH}Value (1b) is chosen immediate value in above-mentioned 3 values, when non-quantized twice Δ _{F_PUCCH}When (1b) value differs not enough 2dB, do not carry out Δ _{F_PUCCH}Adjustment (1b); Otherwise, then carry out Δ _{F_PUCCH}Renewal (1b) realizes by the RRC signaling.

Δ _{F_PUCCH}Same P of update cycle (1b) _{O_UE_PUCCH}, be SINR _{Target, PUCCH}Update cycle T _BLERIntegral multiple.At P _{O_UE_PUCCH}Updated time is carried out P earlier _{O_UE_PUCCH}Renewal calculate, and then calculate Δ _{F_PUCCH}Renewal (1b).

For PUCCH form 2:

Initial value arranges:

Δ _{F_PUCCH}(2) _ini＝1dB。

Updating value is calculated:

Each measures statistic period T _BLERIn, calculate the BLER of PUCCH form 2, and obtain accumulating adjustment amount

Δ SINR wherein _{PUCCH, 2}Outer shroud adjustment amount for the target SINR of PUCCH form 2 transmission;

${\mathrm{\Δ\Δ}}_{F\_\mathrm{PUCCH}}\left(2\right)=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}{\mathrm{\ΔSINR}}_{\mathrm{PUCCH},2}-P_{O\_\mathrm{UE}\_\mathrm{PUCCH}};$

Δ _{F_PUCCH}(2)＝Δ _{F_PUCCH}(2) _ini+ΔΔ _{F_PUCCH}(2)；

Δ after the quantification _{F_PUCCH}(2) span is [2,0,1,2] dB.

Equally, according to not quantizing Δ _{F_PUCCH}(2) value is chosen immediate value in above-mentioned 4 values, when non-quantized twice Δ _{F_PUCCH}When (2) value differs not enough 1dB, do not carry out Δ _{F_PUCCH}(2) adjustment; Otherwise, then carry out Δ _{F_PUCCH}(2) renewal realizes by the RRC signaling.

Δ _{F_PUCCH}(2) same P of update cycle _{O_UE_PUCCH}, be SINR _{Target, PUCCH}Update cycle T _BLERIntegral multiple.At P _{O_UE_PUCCH}Updated time is carried out P earlier _{O_UE_PUCCH}Renewal calculate, and then calculate Δ _{F_PUCCH}(2) renewal.

For PUCCH form 2a:

Initial value arranges:

Δ _{F_PUCCH}(2a) _ini＝2dB。

Updating value is calculated:

Each measures statistic period T _BLERIn, calculate the BLER of PUCCH form 2a, and obtain accumulating adjustment amount

Δ SINR wherein _{PUCCH, 2a}Outer shroud adjustment amount for the target SINR of PUCCH form 2a transmission;

${\mathrm{\Δ\Δ}}_{F\_\mathrm{PUCCH}}\left(2a\right)=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}{\mathrm{\ΔSINR}}_{\mathrm{PUCCH},2a}-P_{O\_\mathrm{UE}\_\mathrm{PUCCH}};$

Δ _{F_PUCCH}(2a)＝Δ _{F_PUCCH}(2a) _ini+ΔΔ _{F_PUCCH}(2a)；

Δ after the quantification _{F_PUCCH}(2a) span is [2,0,2] dB.

Equally, according to not quantizing Δ _{F_PUCCH}Value (2a) is chosen immediate value in above-mentioned 3 values, when non-quantized twice Δ _{F_PUCCH}When (2a) value differs not enough 2dB, do not carry out Δ _{F_PUCCH}Adjustment (2a); Otherwise, then carry out Δ _{F_PUCCH}Renewal (2a) realizes by the RRC signaling.

Δ _{F_PUCCH}Same P of update cycle (2a) _{O_UE_PUCCH}, be SINR _{Target, PUCCH}Update cycle T _BLERIntegral multiple.At P _{O_UE_PUCCH}Updated time is carried out P earlier _{O_UE_PUCCH}Renewal calculate, and then calculate Δ _{F_PUCCH}Renewal (2a).

For PUCCH form 2b:

Initial value arranges:

Δ _{F_PUCCH}(2b) _ini＝2dB。

Updating value is calculated:

Each measures statistic period T _BLERIn, calculate the BLER of PUCCH form 2b, and obtain accumulating adjustment amount

Δ SINR wherein _{PUCCH, 2b}Outer shroud adjustment amount for the target SINR of PUCCH form 2b transmission;

${\mathrm{\Δ\Δ}}_{F\_\mathrm{PUCCH}}\left(2b\right)=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}{\mathrm{\ΔSINR}}_{\mathrm{PUCCH},2b}-P_{O\_\mathrm{UE}\_\mathrm{PUCCH}};$

Δ _{F_PUCCH}(2b)＝Δ _{F_PUCCH}(2b) _ini+ΔΔ _{F_PUCCH}(2b)；

Δ after the quantification _{F_PUCCH}(2b) span is [2,0,2] dB.

Equally, according to not quantizing Δ _{F_PUCCH}Value (2b) is chosen immediate value in above-mentioned 3 values, when non-quantized twice Δ _{F_PUCCH}When (2b) value differs not enough 2dB, do not carry out Δ _{F_PUCCH}Adjustment (2b); Otherwise, then carry out Δ _{F_PUCCH}Renewal (2b) realizes by the RRC signaling.

Δ _{F_PUCCH}Same P of update cycle (2b) _{O_UE_PUCCH}, be SINR _{Target, PUCCH}Update cycle T _BLERIntegral multiple.At P _{O_UE_PUCCH}Updated time is carried out P earlier _{O_UE_PUCCH}Renewal calculate, and then calculate Δ _{F_PUCCH}Renewal (2b).

This shows, relative prior art, the present invention has considered that the factor of PUCCH " omission " " flase drop " " the correct detection " carries out the closed power adjustment, and combined optimization P _{O_UE_PUCCH}, P _{O_NOMINAL_PUCCH}, Δ _{F_PUCCH}(F) parameter setting and adjustment can restrain after the closed loop cumulant is reset fast, have improved the PUCCH transmission performance, have optimized the utilization of PUCCH power resource, and further have been conducive to improve descending PDSCH transmission performances.

The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (9)

1. optimize the method that physical uplink control channel power is controlled for one kind, it is characterized in that: in the closed loop adjustment process, only the result according to physical uplink control channel PUCCH " omission ", " flase drop " and " the correct detection " carries out the setting of through-put power control TPC command word; Perhaps according to the result of PUCCH " omission ", " flase drop " and " the correct detection ", and according to the comparative result of SINR measured value and desired value, carry out the setting of TPC command word;

Wherein " omission " refer to because PUCCH transmission quality former thereby cause eNB not detect; " flase drop " refers to that eNB detects but the demodulation mistake, and for the correct situation of demodulation, then is " the correct detection ";

Wherein, " omission " arranged power and raise step delta _LargeUp, " flase drop " arranged power raises step delta _SmallUp, " the correct detection " arranged the downward modulation step delta _StepDown, Δ wherein _LargeUp〉=Δ _SmallUp

2. the method for claim 1 is characterized in that:

For down link control information DCI form 1/1A/1B/1D/2/2A/2B/3, Δ _LargeUp=3dB, Δ _SmallUp=1dB, Δ _StepDown=-0.01dB;

For DCI form 3A, then Δ _LargeUp=Δ _SmallUp=1dB, Δ _StepDown=-0.01dB.

3. the method for claim 1 is characterized in that, described result according to PUCCH " omission ", " flase drop " and " the correct detection ", and according to the comparative result of SINR measured value and desired value, the setting of carrying out the TPC command word may further comprise the steps:

(1) comparative result according to SINR measured value and desired value arranges the first adjustment step value;

(2) result according to PUCCH " omission ", " flase drop " and " the correct detection " arranges the second adjustment step value;

(3) get the first final step value of adjusting in step value and the second adjustment step value of adjusting of higher value conduct; Or get first adjust step value and second adjust step value and as the final step value of adjusting.

4. the method for claim 1 is characterized in that also comprising the outer shroud adjustment process, and the PUCCH power expression is as follows:

P _PUCCH(i)＝min{P _CMAX,P _{O_PUCCH}+PL+h(n _CQI,n _HARQ)+Δ _{F_PUCCH}(F)+g(i)}

P _CMAXThe maximum transmission power corresponding with the terminal power grade for 3GPP RAN4 definition;

P _{O_PUCCH}Be the expectation received power of PUCCH form 1a, it is following two parts sum: P _{O_NOMINAL_PUCCH}, P _{O_UE_PUCCH}, P wherein _{O_NOMINAL_PUCCH}, P _{O_UE_PUCCH}Be respectively cell-level and UE level parameter;

PL is the downlink path loss that UE measures;

Wherein, PUCCH form 2/2a/2b is fed back to benchmark and carries out Δ to send broadband CQI _{F_PUCCH}(F) setting will be added a side-play amount h (n in addition when feedack exceeds 4bit _CQI, n _HARQ);

PUCCH has multiple form, Δ _{F_PUCCH}(F) for the relevant power adjustment of PUCCH form, be defined as every kind of PUCCH type with respect to the power bias of benchmark PUCCH form, wherein benchmark PUCCH form is PUCCH form 1a;

Under the TDD pattern, to same sub-frame of uplink, can send the TPC command word at a plurality of descending sub frames, at this moment need all power control commands δ _PUCCHAdd up, be presented as g (i);

In the outer shroud adjustment process, to three parameter P _{O_UE_PUCCH}, Δ _{F_PUCCH}(F), P _{O_NOMINAL_PUCCH}Carry out the combined optimization adjustment, wherein according to P _{O_UE_PUCCH}Adjustment amount to Δ _{F_PUCCH}(F) and P _{O_NOMINAL_PUCCH}Adjust, and certain measurement adjustment time is set and adjusts thresholding, then carry out the adjustment setting of power after satisfying condition.

5. method as claimed in claim 4 is characterized in that: to parameter P _{O_UE_PUCCH}The adjustment mode as follows:

Initial value arranges: P _{O_UE_PUCCH}Initial value is made as 0;

Updating value is calculated: $P_{O\_\mathrm{UE}\_\mathrm{PUCCH}}=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}\mathrm{\ΔSIN}{R}_{\mathrm{PUCCH}};$

Measure measurement period at each, according to the accumulation Δ SINR that upgrades _PUCCHValue is calculated the P that upgrades _{O_UE_PUCCH}Wherein, Δ SINR _PUCCHFor outer shroud is adjusted SINR _{Target, PUCCH}Adjustment amount, SINR _{Target, PUCCH}Corresponding target SINR when transmitting for benchmark PUCCH form.

6. method as claimed in claim 5 is characterized in that:

As non-quantized twice P _{O_UE_PUCCH}When value differs less than threshold value, do not carry out P _{O_UE_PUCCH}Adjustment; Otherwise, then carry out P _{O_UE_PUCCH}Renewal.

7. as claim 4 or 5 described methods, it is characterized in that: to parameter P _{O_NOMINAL_PUCCH}The adjustment mode as follows:

Initial value arranges:

P _{O_NOMINAL_PUCCH}Initial value is made as SINR _{Target, PUCCH, ini}+ IN _Null(dBm), SINR wherein _{Target, PUCCH, ini}Be the corresponding SINR value of PUCCH form 1a under target BLER, IN _NullNetwork measure obtains during for the residential quarter zero load interference and noise value;

Updating value is calculated:

Add up the P of each UE _{O_UE_PUCCH}Parameter reaches the number in span lower bound and the upper bound respectively, is labeled as N _{UE, LL}, N _{UE, HL}

Work as N _{UE, LL}, N _{UE, HL}Be not 0 o'clock simultaneously, if

Perhaps

The time, then upgrade Δ P _{O_NOMINAL_PUCCH}=10lg (R _{UE, thd}), wherein, R _{UE, thd}Be positive integer;

Work as N _{UE, LL}, N _{UE, HL}Be 0 o'clock simultaneously, do not carry out P _{O_NOMINAL_PUCCH}Upgrade;

Work as N _{UE, LL}, N _{UE, HL}In any is 0 o'clock, surpass if the UE number that reaches the span lower bound accounts for total UE ratio

Δ P then _{O_NOMINAL_PUCCH}=-10lg (R _{UE, thd}), perhaps $\mathrm{\Δ}{P}_{O\_\mathrm{NOMINAL}\_\mathrm{PUCCH}}=-10\·\lg \left(\frac{6}{R_{\mathrm{UE},\mathrm{thd}}}\right);$ Accounting for total UE number ratio as if the UE number that reaches the span upper bound surpasses

Δ P then _{O_NOMINAL_PUCCH}=10lg (R _{UE, thd}), perhaps ${\mathrm{\ΔP}}_{O\_\mathrm{NOMINAL}\_\mathrm{PUCCH}}=10\·\lg \left(\frac{6}{R_{\mathrm{UE},\mathrm{thd}}}\right);$

P after the renewal _{O_NOMINAL_PUCCH}=P _{O_NOMINAL_PUCCH}+ Δ P _{O_NOMINAL_PUCCH}

Simultaneously each UE is upgraded P _{O_UE_PUCCH}=P _{O_UE_PUCCH}-Δ P _{O_NOMINAL_PUCCH}

8. method as claimed in claim 7 is characterized in that: R _{UE, thd}Span be 2-4.

9. as claim 4 or 5 described methods, it is characterized in that: to the parameter Δ _{F_PUCCH}(F) adjustment mode is as follows:

For PUCCH form 1: Δ _{F_PUCCH}(1)=0dB;

For PUCCH form 1b:

Initial value arranges:

Δ _{F_PUCCH}(1b) _ini=3dB；

Updating value is calculated:

Each is measured in the measurement period, calculates the BLER of PUCCH form 1b, and obtains accumulating adjustment amount

Δ SINR wherein _{PUCCH, 1b}Outer shroud adjustment amount for the target SINR of PUCCH form 1b transmission;

$\mathrm{\Δ}{\mathrm{\Δ}}_{F\_\mathrm{PUCCH}}\left(1b\right)=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}\mathrm{\ΔSIN}{R}_{\mathrm{PUCCH},1b}-P_{O\_\mathrm{UE}\_\mathrm{PUCCH}};$

Δ _{F_PUCCH}(1b)＝Δ _{F_PUCCH}(1b) _ini+ΔΔ _{F_PUCCH}(1b)；

For PUCCH form 2:

Initial value arranges:

Δ _{F_PUCCH}(2) _ini=1dB；

Updating value is calculated:

Each measures statistic period T _BLERIn, calculate the BLER of PUCCH form 2, and obtain accumulating adjustment amount

Δ SINR wherein _{PUCCH, 2}Outer shroud adjustment amount for the target SINR of PUCCH form 2 transmission;

${\mathrm{\Δ\Δ}}_{F\_\mathrm{PUCCH}}\left(2\right)=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}\mathrm{\ΔSIN}{R}_{\mathrm{PUCCH},2}-P_{O\_\mathrm{UE}\_\mathrm{PUCCH}};$

Δ _{F_PUCCH}(2)＝Δ _{F_PUCCH}(2) _ini+ΔΔ _{F_PUCCH}(2)；

For PUCCH form 2a:

Initial value arranges:

Δ _{F_PUCCH}(2a) _ini=2dB；

Updating value is calculated:

Each measures statistic period T _BLERIn, calculate the BLER of PUCCH form 2a, and obtain accumulating adjustment amount Δ SINR wherein _{PUCCH, 2a}Outer shroud adjustment amount for the target SINR of PUCCH form 2a transmission;

${\mathrm{\Δ\Δ}}_{F\_\mathrm{PUCCH}}\left(2a\right)=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}\mathrm{\ΔSIN}{R}_{\mathrm{PUCCH},2a}-P_{O\_\mathrm{UE}\_\mathrm{PUCCH}};$

Δ _{F_PUCCH}(2a)＝Δ _{F_PUCCH}(2a) _ini+ΔΔ _{F_PUCCH}(2a)；

For PUCCH form 2b:

Initial value arranges:

Δ _{F_PUCCH}(2b) _ini=2dB；

Updating value is calculated:

Each measures statistic period T _BLERIn, calculate the BLER of PUCCH form 2b, and obtain accumulating adjustment amount

Δ SINR wherein _{PUCCH, 2b}Outer shroud adjustment amount for the target SINR of PUCCH form 2b transmission;

${\mathrm{\Δ\Δ}}_{F\_\mathrm{PUCCH}}\left(2b\right)=\underset{\mathrm{ini}}{\overset{\mathrm{now}}{\mathrm{\Σ}}}\mathrm{\ΔSIN}{R}_{\mathrm{PUCCH},2b}-P_{O\_\mathrm{UE}\_\mathrm{PUCCH}};$

Δ _{F_PUCCH}(2b)＝Δ _{F_PUCCH}(2b) _ini+ΔΔ _{F_PUCCH}(2b)。

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