CN101902750A - Method for adjusting power parameter value and equipment - Google Patents
Method for adjusting power parameter value and equipment Download PDFInfo
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- CN101902750A CN101902750A CN2009100855901A CN200910085590A CN101902750A CN 101902750 A CN101902750 A CN 101902750A CN 2009100855901 A CN2009100855901 A CN 2009100855901A CN 200910085590 A CN200910085590 A CN 200910085590A CN 101902750 A CN101902750 A CN 101902750A
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Abstract
The invention relates to a wireless communication technology, in particular to a method for adjusting a power parameter value and equipment thereof, aiming at solving the problem that the coverage area of each signal path is inconsistent easily caused by the inaccurate manual adjustment of the power parameter value in the prior art. The method of the embodiment comprises the following steps of: ensuring a difference value between SRS power and physical uplink signal path power, wherein the SRS power is signal power when a terminal transmits SRS, and the physical uplink signal path power is signal power when the terminal receives transmission data and control information through a physical uplink signal path; and adjusting an SRS power parameter value or a physical uplink signal path power parameter value when the difference value is within a previously-set adjustment range. The embodiment of the method can lead the power difference value between the adjusted powder of a reference signal for detecting and the power of the physical uplink signal path to be smaller, and reduces the condition that the coverage area of each signal path is inconsistent.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of method and apparatus of adjusting power parameter value.
Background technology
SRS (survey and use reference signal) is to offer a kind of known signal that receiving terminal is used for channel detection by transmitting terminal.Detection is mainly used in following two purposes with reference signal:
1, uplink channel estimation is used for the coherent detection and the demodulation of eNodeB (evolution base station) end;
2, uplink signal-channel quality is measured, and promptly CQI (Channel Quality Indicator, channel quality indication) measures.
For TDD (Time Division Duplex, time division duplex) system, because the uplink and downlink link is symmetrical, so uplink reference signals can also be used to obtaining the channel quality information of down link.
PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) is used to carry the data from transmission channel.
PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel) is used to carry the data from control channel.
In the wireless environment of complexity, owing to the difference of transmitting power, modulation system, might cause the coverage of up different channels inconsistent between the up different channels.If SRS and PUSCH, and the inconsistent meeting of the coverage of SRS and PUCCH causes negative effects such as conversation loss.
Existing technology is by the human configuration power parameter value, realizes the adjustment to the up channel coverage.Because the wireless environment complexity, the power parameter value of human configuration be not very accurately, be easy to cause the coverage of each channel inconsistent, thereby cause degradation negative effect under the user experience.
In sum, the adjustment to the channel coverage at present realizes by the human configuration power parameter value and since the power parameter value of human configuration be not very accurately, be easy to cause the coverage of each channel inconsistent.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of adjusting power parameter value, and is inaccurate in order to solve manually power parameter value being adjusted of existing in the prior art, and is easy to cause the inconsistent problem of coverage of each channel.
A kind of method of adjusting power parameter value that the embodiment of the invention provides, this method comprises:
Determine to survey difference with reference signal SRS power and physical uplink channel power, described SRS power is the signal power that terminal sends SRS, and described physical uplink channel power is terminal receives and sends data and control information by the physical uplink channel a signal power;
Described difference is adjusted SRS power parameter value or physical uplink channel power parameter value, so that the difference of SRS power and physical uplink channel power is not in described adjusting range in predefined adjusting range the time.
A kind of equipment of adjusting power parameter value that the embodiment of the invention provides, this equipment comprises:
The difference determination module, be used for determining to survey the difference of using reference signal SRS power and physical uplink channel power, described SRS power is the signal power that terminal sends SRS, and described physical uplink channel power is that terminal is passed through the signal power that the physical uplink channel sends data and control information;
Adjusting module is used for described difference when predefined adjusting range, adjusts SRS power parameter value or physical uplink channel power parameter value, so that the difference of SRS power and physical uplink channel power is not in described adjusting range.
The embodiment of the invention is determined the difference of SRS power and physical uplink channel power, and described SRS power is the signal power that terminal sends SRS, and described physical uplink channel power is terminal receives and sends data and control information by the physical uplink channel a signal power; Described difference is adjusted SRS power parameter value or physical uplink channel power parameter value, so that the difference of SRS power and physical uplink channel power is not in described adjusting range in predefined adjusting range the time.Owing to can adjust with the power parameter value of reference signal or physical uplink channel detection according to the difference of surveying with the power of the power of reference signal and physical uplink channel, make adjusted detection less with the difference of the power of the power of reference signal and physical uplink channel, reduce the inconsistent situation of coverage of each channel, improved the performance of edge termination.
Description of drawings
Fig. 1 adjusts the device structure schematic diagram of power parameter value for the embodiment of the invention;
Fig. 2 adjusts the method flow schematic diagram of power parameter value for the embodiment of the invention.
Embodiment
The embodiment of the invention is determined the difference of SRS (survey and use reference signal) power and physical uplink channel power; Difference is adjusted SRS power parameter value or physical uplink channel power parameter value in predefined adjusting range the time; Wherein SRS power is the signal power that terminal sends SRS, and the physical uplink channel power is that terminal is passed through the signal power that the physical uplink channel receives data.Owing to can adjust with the power parameter value of reference signal or physical uplink channel detection according to the difference of surveying with the power of the power of reference signal and physical uplink channel, make adjusted detection less, reduced the inconsistent situation of coverage of each channel with the difference of the power of the power of reference signal and physical uplink channel.
At present, according to the terminal transmit power P of SRS
SRSFor:
P
SRS(i)=min{P
MAX, P
SRS_OFFSET+ 10log
10(M
SRS)+P
O_PUSCH(j)+α PL+f (i) } ... .. formula 1.
The needed terminal transmission power P of PUSCH
PUSCHFor:
P
PUSCH(i)=min{P
MAX, 10log
10(M
PUSCH(i))+P
OPUSCH(j)+α (i) PL+ Δ
TF(i)+f (i) } ... .. formula 2.
The needed terminal transmission power P of PUCCH
PUCCHFor:
P
PUCCH(i)=min{P
MAX, P
0_PUCCH+ PL+h (n
CQI, n
HARQ)+Δ
F_PUCCH(F)+g (i) } ... .. formula 3.
Wherein in the formula 1, P
MAXIt is the up maximum transmitted power that allows by the decision of terminal power grade; P
SRS_OFFSETIt is the power excursion of uplink pilot signal; M
SRSBe the SRS transmission bandwidth of subframe, i.e. the resource block number of SRS use; α represents the coefficient of part path loss compensation, is the exclusive parameter in sub-district of one 3 bit, is controlled by high-level signaling; PL is the descending path loss of estimating in terminal, is to be estimated from the downlink path-loss that the SRS reference signal transmitting power of RSRP measurement result and signaling calculates by terminal; H (n
CQI, n
HARQ) be independent parameter among the PUCCH, relevant with channel quality and HARQ; Δ
TF(i) gain of expression transformat; F (i) is the exclusive correction value of terminal, also is called transmission power control command, is the correction of the result of closed power control to uplink transmission power; P
O_PUSCH(j) be the expectation received power of eNodeB on PUSCH, P
O_PUSCH(j) by the sub-district of one 8 bit exclusive normalization part P
O_NOMINAL_PUSCH(j) and the exclusive part P of the terminal of 4 bits
O_UE_PUSCH(j) sum is formed, i.e. P
O_PUSCH(j)=P
O_NOMINAL_PUSCH(j)+P
O_UE_PUSCH(j); ENodeB is provided with P according to following formula
O_NOMINAL_PUSCH(j): P
O_NOMINAL_PUSCH(j)=Γ+I+ (1-α) PL
0
Wherein Γ is the normalization target signal to noise ratio; I is the total interference level of eNodeB place up link, comprises thermal noise and from the interference of other sub-districts; (1-α) PL
0It is compensation to the compensation of part path loss.PL
0Be the reference path loss size of sub-district, get different sizes according to the difference of radius of society and cell environment.
Wherein in the formula 2, parameter its implication identical and formula 1 identical repeating no more with formula 1 title.M
PUSCH(i) be the transmission bandwidth of PUSCH, promptly terminal is from subframe i-K
PUSCHReceive in the scheduling grant resource block number of efficient resource allocation correspondence among the sub-frame of uplink i of acquisition; Δ
TF(i) gain of expression transformat.
Wherein in the formula 3, parameter its implication identical and formula 1 identical repeating no more with formula 1 title.
Δ
F_PUCCH(F) be the relative quality that is used for controlling different PDCCH (Physical Downlink ControlChannel, Physical Downlink Control Channel) format, in the RRC signaling, obtain by terminal.G (i) is the correction value that terminal is exclusive, i.e. a transmission power control command; P
O_PUCCHBeing the expectation received power of eNode B on channel PUCCH, is by the exclusive parameter P in sub-district
O_NOMINAL_PUCCHThe P specific with terminal
O_UE_PUCCHForm.Wherein, eNode B calculates P according to following formula
O_NOMINAL_PUCCH: P
O_NOMINAL_PUCCH=Γ
PUCCH+ I
Wherein, Γ is the normalization target signal to noise ratio; I is the total interference level of eNodeB place up link, comprises thermal noise and from the interference of other sub-districts.
The embodiment of the invention is according to the relation of three channels, by adjusting the power parameter value in top three formula, thereby can change three channel coverages, reduced the inconsistent situation of coverage of each channel, improved the performance of edge termination.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
As shown in Figure 1, the equipment of embodiment of the invention adjustment power parameter value comprises: difference determination module 10 and adjusting module 20.
Wherein, SRS power is that the signal power of terminal transmission SRS (is the P in the formula 1
SRS), the physical uplink channel power is that to pass through the signal power that the physical uplink channel sends data and control information (be the P in the formula 2 to terminal
PUSCHOr the P in the formula 3
PUCCH).
Adjusting module 20, when being used for the difference determined at difference determination module 10 in predefined adjusting range, adjust SRS power parameter value or physical uplink channel power parameter value, so that the difference of SRS power and physical uplink channel power is not in described adjusting range.
Wherein, the equipment of the embodiment of the invention can further include:
Accordingly, adjusting module 20 when determining that difference that difference determination module 10 determines is in predefined adjusting range, is adjusted SRS power parameter value or physical uplink channel power parameter value after trigger module 30 triggers.
In specific implementation process, the difference of SRS power and physical uplink channel power can be that SRS power deducts the physical uplink channel power, also can be that the physical uplink channel power deducts SRS power; Accordingly, the first threshold and second threshold value will be carried out certain variation.
Such as being that SRS power deducts the physical uplink channel power, first threshold is that-1, the second threshold value is 5; When the channel power of then going physically deducted SRS power, first threshold was that 1, the second threshold value is-5.
The first threshold and second threshold value are according to being determined by engineering experience or link simulation, as when carrying out the project planning test, can determine deviation range by adding up the up SRS of terminal and the difference of the signal on the PUCCH in base station side, two signals can both normally receive and not influence its function in this scope; As when the link simulation by emulation cell edge different terminals when the different configuration parameter situation SRS and the received signal power of PUCCH, and consider both factors such as modulation system, interference, environment, count the difference power of base station signal can correctly receive SRS and PUCCH the time.
If the difference that difference determination module 10 is determined is not more than first threshold, and is not less than second threshold value (promptly between the first threshold and second threshold value), show that then PUCCH is consistent with the coverage of SRS;
If the difference that difference determination module 10 is determined then shows the coverage of the coverage of PUCCH less than SRS greater than first threshold;
If the difference that difference determination module 10 is determined then shows the coverage of the coverage of PUCCH greater than SRS less than second threshold value.
When definite difference is in predefined adjusting range, two kinds of adjustment modes are arranged, promptly adjust SRS power parameter value or physical uplink channel power parameter value, be elaborated respectively below.
Adjusting module 20 is determined the scope of path loss penalty coefficient adjustment amount when adjusting the SRS power parameter value, and determines the value of a value as path loss penalty coefficient adjustment amount from this scope; According to the value of the path loss penalty coefficient adjustment amount of determining, the value of the exclusive normalized parameter in sub-district in the value of the path loss penalty coefficient in the adjustment SRS power parameter and the base station expectation received power;
The value of wherein adjusted path loss penalty coefficient is a value in the set of path loss penalty coefficient.
If the physical uplink channel is PUSCH, then the exclusive normalized parameter in sub-district is the parameter of base station in the expectation received power of PUSCH in the expectation received power of base station;
If the physical uplink channel is PUCCH, then the exclusive normalized parameter in sub-district is the parameter of base station in the expectation received power of PUCCH in the expectation received power of base station.
In the set of path loss penalty coefficient is the numerical value of enumerating of path loss penalty coefficient, the numerical value of enumerating such as regulation path loss penalty coefficient in the present agreement is being that step-length increases with 0.1 all after surpassing 0.4, so enumerated value is respectively [0 in the set of path loss penalty coefficient, 0.4,0.5,0.6,0.7,0.8,0.9,1].
Preferable, the value of the path loss penalty coefficient adjustment amount of determining is:
The value that satisfies adjusted path loss penalty coefficient in the scope of path loss penalty coefficient adjustment amount is the minimum value of the condition of a value in the set of path loss penalty coefficient.
Can get access to one group of suitable parameters by this inequality, these parameters can be for certain space being provided for follow-up self-optimizing adjustment but select minimum value as the result who adjusts in theory.
If the difference that difference determination module 10 is determined is greater than first threshold, adjusting module 20 is reduced the value of the exclusive normalized parameter in sub-district in the expectation received powers of base station, raises the value of path loss penalty coefficient; If the difference that difference determination module 10 is determined is less than second threshold value, adjusting module 20 raises the value of the exclusive normalized parameter in sub-district in the expectation received power of base station, the value of downward modulation path loss penalty coefficient.
Concrete, if the difference that difference determination module 10 is determined greater than first threshold, adjusting module 20 is determined the scope of path loss penalty coefficient adjustment amount according to following formula:
Δ P-Δ α * (PL
0-PL)＜Th
Max... formula 4;
If the difference that difference determination module 10 is determined is less than second threshold value, adjusting module 20 is determined the scope of path loss penalty coefficient adjustment amount according to following formula:
Δ P-Δ α * (PL
0-PL)＞Th
Min... formula 5;
Wherein, Δ P is the difference of SRS power and physical uplink channel power, and Δ α is a path loss penalty coefficient adjustment amount, PL
0Be the reference path loss of sub-district, PL is the descending path loss that terminal is estimated, Th
MaxBe first threshold, Th
MinIt is second threshold value.
No matter the difference that difference determination module 10 is determined is greater than first threshold or less than second threshold value, adjusting module 20 is all with the value of definite path loss penalty coefficient adjustment amount and the value addition of the path loss penalty coefficient in the SRS power parameter, the value that obtains is as the value of the path loss penalty coefficient in the adjusted SRS power parameter, the value of the path loss penalty coefficient in the promptly adjusted SRS power parameter=Δ α+α;
No matter the difference that difference determination module 10 is determined is greater than first threshold or less than second threshold value, adjusting module 20 is all adjusted the value of the exclusive normalized parameter in sub-district in the expectation received power of base station according to following formula:
Adjusted P
O_Nominal_PUSCH=current P
O_Nominal_PUSCH-Δ α * PL
0... formula 6;
P
O_NOMINAL_PUSCHBe the exclusive normalized parameter in sub-district, i.e. P in the expectation received power of base station
O_PUSCHA part, Δ α is a path loss penalty coefficient adjustment amount, PL
0It is the reference path loss of sub-district.
Mode 2, adjustment physical uplink channel power parameter value.
Adjusting module 20 is when adjusting physical uplink channel power parameter value, adjust the value of the exclusive normalized parameter in sub-district in the base station expectation received power in the physical uplink channel power parameter, the value of the exclusive normalized parameter in sub-district is between the first threshold and second threshold value in the expectation received power of adjusted base station.
If the difference that difference determination module 10 is determined is greater than first threshold, adjusting module 20 raises P
O_NOMINAL_PUSCHValue and downward modulation path loss penalty coefficient α value; If the difference that difference determination module 10 is determined is less than second threshold value, adjusting module 20 is reduced P
O_NOMINAL_PUSCHWith rise path loss penalty coefficient α value.
Preferable, determine the adjustment amount of the sub-district expectation received power of a value minimum and that can satisfy the exclusive normalized parameter in sub-district in the expectation received power of adjusted base station between the first threshold and second threshold value.
Wherein, the physical uplink channel can be PUSCH or PUCCH.
If the physical uplink channel is PUSCH, deduct the difference that formula 2 just can obtain SRS power and PUSCH power with formula 1.
Concrete, difference determination module 10 is determined the difference of SRS power and PUSCH power according to following formula:
P
Srs-P
Pusch=P
Srs_offset+ 10log
10(M
Srs)-10log
10(M
Pusch)-Δ
TF(i) ... formula 7;
Wherein, P
SrsBe SRS power, P
PuschBe PUSCH power, P
Srs_offsetBe the power offset values of uplink pilot signal, M
SrsBe the SRS transmission bandwidth of subframe, M
PuschBe the transmission bandwidth of PUSCH, Δ
TF(i) be the gain of transformat.
If the physical uplink channel is Physical Uplink Shared Channel PUCCH, deduct formula 3 with formula 1:
P
Srs-P
Pucch=(1-α) * (PL
0-PL)+and offset ... formula 8;
Wherein α is the path loss penalty coefficient, PL
0Be the reference path loss of sub-district, PL is the descending path loss that terminal is estimated, offset is a function about the terminal personality.
Because deducting behind the formula 3 as can be seen with formula 1, the relation of the coverage of the coverage of SRS and PUCCH is difficult to definite, so PUCCH is with the PUSCH difference, can not subtract each other by formula and obtain, when then the capable physically channel of difference determination module 10 is PUCCH, determine that setting-up time inward flange terminal sends the signal power of SRS and edge termination receives data by PUCCH signal power, according to the signal power of the signal power of the SRS that determines and definite PUCCH, determine the difference of SRS power and PUCCH power.
Concrete, SRS in difference determination module 10 statistics a period of time T, the signal of PUCCH channel top edge terminal, wherein each terminal belongs to center terminal or belongs to edge termination and can obtain from the center/edge termination discriminating module of ICIC (Inter-Cell Interference Coordinate, Inter-Cell Interference Coordination) algorithm in the system.The statistics time span T and when begin to add up by O﹠amp; M (Operations﹠amp; Maintenance, operation and maintenance) dispose and finish;
Wherein x% can set as required, such as 5% or 3%, in general all is 5% or 3% average reference as curve with curve in the engineering.
In specific implementation process, difference determination module 10 can also be with CDF
RSThe mean value of one segment value of distribution curve is as the receiving intensity P of edge termination on the SRS channel
SRS, with CDF
PucchThe mean value of an identical segment value of distribution curve is as the receiving intensity P of edge termination on the PUCCH channel
PucchGet mean value such as getting this segment value of Z1%～Z2%, concrete Z1% and Z2% can set as required, such as getting 2%～6%.
Wherein, the equipment of embodiment of the invention adjustment power parameter value can further include: notification module 40.
Wherein, the equipment that the embodiment of the invention is adjusted power parameter value can be the base station, also can be other equipment of network side, can also be new equipment of network side.
As shown in Figure 2, the method for embodiment of the invention adjustment power parameter value comprises the following steps:
Wherein, SRS power is that the signal power of terminal transmission SRS (is the P in the formula 1
SRS), the physical uplink channel power is that to pass through the signal power that the physical uplink channel sends data and control information (be the P in the formula 2 to terminal
PUSCHOr the P in the formula 3
PUCCH).
The difference of step 202, the SRS power of determining and physical uplink channel power is in predefined adjusting range the time, adjust SRS power parameter value or physical uplink channel power parameter value, so that the difference of SRS power and physical uplink channel power is not in described adjusting range.
In the step 202, during greater than first threshold or less than second threshold value, determine difference in the difference of determining in predefined adjusting range, wherein first threshold is greater than second threshold value.
In specific implementation process, the difference of SRS power and physical uplink channel power can be that SRS power deducts the physical uplink channel power, also can be that the physical uplink channel power deducts SRS power; Accordingly, the first threshold and second threshold value will be carried out certain variation.
Such as being that SRS power deducts the physical uplink channel power, first threshold is that-1, the second threshold value is 5; When the channel power of then going physically deducted SRS power, first threshold was that 1, the second threshold value is-5.
The first threshold and second threshold value are according to being determined by engineering experience or link simulation.
If the difference of determining in the step 201 is not more than first threshold, and is not less than second threshold value (promptly between the first threshold and second threshold value), show that then PUCCH is consistent with the coverage of SRS;
If the difference of determining in the step 201 then shows the coverage of the coverage of PUCCH less than SRS greater than first threshold;
If the difference of determining in the step 201 then shows the coverage of the coverage of PUCCH greater than SRS less than second threshold value.
When definite difference is in predefined adjusting range, two kinds of adjustment modes are arranged in the step 202, promptly adjust SRS power parameter value or physical uplink channel power parameter value, be elaborated respectively below.
In the step 202, when adjusting the SRS power parameter value, determine the scope of path loss penalty coefficient adjustment amount, and from this scope, determine the value of a value as path loss penalty coefficient adjustment amount; According to the value of the path loss penalty coefficient adjustment amount of determining, the value of the exclusive normalized parameter in sub-district in the value of the path loss penalty coefficient in the adjustment SRS power parameter and the base station expectation received power;
The value of wherein adjusted path loss penalty coefficient is a value in the set of path loss penalty coefficient.
If the physical uplink channel is PUSCH, then the exclusive normalized parameter in sub-district is the parameter of base station in the expectation received power of PUSCH in the expectation received power of base station;
If the physical uplink channel is PUCCH, then the exclusive normalized parameter in sub-district is the parameter of base station in the expectation received power of PUCCH in the expectation received power of base station.
In the set of path loss penalty coefficient is the numerical value of enumerating of path loss penalty coefficient, the numerical value of enumerating such as regulation path loss penalty coefficient in the present agreement is being that step-length increases with 0.1 all after surpassing 0.4, so enumerated value is respectively [0 in the set of path loss penalty coefficient, 0.4,0.5,0.6,0.7,0.8,0.9,1].
Preferable, the value of the path loss penalty coefficient adjustment amount of determining is:
The value that satisfies adjusted path loss penalty coefficient in the scope of path loss penalty coefficient adjustment amount is the minimum value of the condition of a value in the set of path loss penalty coefficient.
Can get access to one group of suitable parameters by this inequality, these parameters can be for certain space being provided for follow-up self-optimizing adjustment but select minimum value as the result who adjusts in theory.
If the difference of determining in the step 201 needs to raise the exclusive P in sub-district greater than first threshold in the step 202
O_NOMINAL_PUSCHValue and downward modulation path loss penalty coefficient α value; If the difference of determining in the step 201 needs to reduce P less than second threshold value in the step 202
O_NOMINAL_PUSCHWith rise path loss penalty coefficient α value
Concrete, if the difference of determining in the step 201 greater than first threshold, is determined the scope of path loss penalty coefficient adjustment amount according to formula 4 in the step 202;
If the difference of determining in the step 201 less than second threshold value, is determined the scope of path loss penalty coefficient adjustment amount according to formula 5 in the step 202.
No matter the difference of determining in the step 201 is greater than first threshold or less than second threshold value, in the step 202 all with the value of the path loss penalty coefficient adjustment amount determined and the value addition of the path loss penalty coefficient in the SRS power parameter, the value that obtains is as the value of the path loss penalty coefficient in the adjusted SRS power parameter, the value of the path loss penalty coefficient in the promptly adjusted SRS power parameter=Δ α+α;
No matter the difference of determining in the step 201 is greater than first threshold or less than second threshold value, all adjust the value of the exclusive normalized parameter in sub-district in the expectation received power of base station in the step 202 according to formula 6.
Mode 2, adjustment physical uplink channel power parameter value.
In the step 202 when adjusting physical uplink channel power parameter value, adjust the value of the exclusive normalized parameter in sub-district in the base station expectation received power in the physical uplink channel power parameter, the value of the exclusive normalized parameter in sub-district is between the first threshold and second threshold value in the expectation received power of adjusted base station.
If the difference of determining in the step 201 greater than first threshold, raises the value of the exclusive normalized parameter in sub-district in the expectation received power of base station in the step 202; If the difference of determining in the step 201 less than second threshold value, is reduced the value of the exclusive normalized parameter in sub-district in the expectation received power of base station in the step 202.
Preferable, determine the adjustment amount of the sub-district expectation received power of a value minimum and that can satisfy the exclusive normalized parameter in sub-district in the expectation received power of adjusted base station between the first threshold and second threshold value.
Wherein, the physical uplink channel can be PUSCH or PUCCH.
If the physical uplink channel is PUSCH, deduct the difference that formula 2 just can obtain SRS power and PUSCH power with formula 1 in the step 201.
Concrete, determine the difference of SRS power and PUSCH power in the step 201 according to formula 7.
If the physical uplink channel is Physical Uplink Shared Channel PUCCH, since with formula 1 deduct formula 3 back (being formula 8) as can be seen the relation of the coverage of the coverage of SRS and PUCCH be difficult to definite, so PUCCH is with the PUSCH difference, can not subtract each other by formula and obtain, then step 201 can further include:
When the channel of going physically is PUCCH, determine that setting-up time inward flange terminal sends the signal power of SRS and edge termination receives data by PUCCH signal power, according to the signal power of the signal power of the SRS that determines and definite PUCCH, determine the difference of SRS power and PUCCH power.
Concrete, the SRS in statistics a period of time T, the signal of PUCCH channel top edge terminal, wherein each terminal belongs to center terminal or belongs to edge termination and can obtain from the center/edge termination discriminating module of ICIC algorithm in the system.The statistics time span T and when begin to add up by O﹠amp; The M configuration is finished;
Respectively to the received signal power of the edge termination on SRS, the PUCCH channel according to sorting from big to small, and obtain CDF distribution curve CDF respectively
SRSAnd CDF
Pucch
With CDF
RSThe value at the x% place of distribution curve is as the receiving intensity P of edge termination on the SRS channel
SRS, with CDF
PucchThe value at the x% place of distribution curve is as the receiving intensity P of edge termination on the PUCCH channel
Pucch
With the P that obtains
SRSDeduct P
PucchJust obtain the difference of SRS power and physical uplink channel power.
Wherein x% can set as required, such as 5% or 3%, in general all is 5% or 3% average reference as curve with curve in the engineering.
In specific implementation process, can also be with CDF
RSThe mean value of one segment value of distribution curve is as the receiving intensity P of edge termination on the SRS channel
SRS, with CDF
PucchThe mean value of an identical segment value of distribution curve is as the receiving intensity P of edge termination on the PUCCH channel
PucchGet mean value such as getting this segment value of Z1%～Z2%, concrete Z1% and Z2% can set as required, such as getting 2%～6%.
Wherein, can further include after the step 202:
Concrete, can pass through the adjusted information of RRC signaling terminal, also can pass through the adjusted information of other modes (such as broadcasting) notice terminal.
Enumerate three detailed embodiment below, describe respectively.
Embodiment 1:
The base station was the signal power of edge customer in the statistics SRS of unit, the PUCCH channel with one hour, and the differentiation of edge customer and central user obtains by the center/edge customer discriminating module of algorithm.
Wherein about SRS record the N bar, and about PUCCH the M bar arranged, these records are sorted and handle, obtain the distribution curve CDF of RS and PUCCH respectively
RSAnd CDF
Pucch
Respectively with the value at 5% place of distribution curve as the SRS of cell edge, the signal power of PUCCH, be respectively P
RSAnd P
Pucch
Judge both difference DELTA P=P
SRS-P
Pucch, find
The coverage of determining the coverage of PUCCH and SRS is suitable substantially.
Embodiment 2:
Present embodiment has mainly provided when covering is unmatched, and the method for utilizing mode one promptly to adjust the relevant parameter of SRS is adjusted.
The base station was the signal power of edge customer in the statistics SRS of unit, the PUCCH channel with one hour, and the differentiation of edge customer and central user obtains by the center/edge customer discriminating module of algorithm.
Wherein about RS record the N bar, and about PUCCH the M bar arranged, these records are sorted and handle, obtain the distribution curve CDF of RS and PUCCH respectively
RSAnd CDF
Pucch
Respectively with the value at 5% place of distribution curve as the SRS of cell edge, the signal power of PUCCH, be respectively P
RSAnd P
Pucch
Judge both difference DELTA P=P
SRS-P
Pucch, find
Determine the coverage of the coverage of PUCCH less than SRS.
According to inequality
Calculate Minimum Increment Δ α=0.25, suppose that current α is 0.4,, therefore be modified to Δ α=0.3 because 0.4 later enumerated value is that step-length increases with 0.1 all.So adjusted parameter alpha=0.7, and upgrade P
O_Nominal_PUSCHBe adjusted P
O_Nominal_PUSCHP before the=adjustment
O_Nominal_PUSCH-Δ α * PL
0
Because α and P
O_Nominal_PUSCHBe present among the IE of UplinkPowerControl, upgrade these two parameters among this IE, and upgrade all SIB message relevant, and utilize RRC message informing terminal to carry out the corresponding renewal of parameter with this IE.
Embodiment 3:
Present embodiment has mainly provided when covering is unmatched, and the method for utilizing mode two promptly to adjust the relevant parameter of PUCCH is adjusted.
The base station was the signal power of edge customer in the statistics SRS of unit, the PUCCH channel with one hour, and the differentiation of edge customer and central user obtains by the center/edge customer discriminating module of algorithm.
Wherein about RS record the N bar, and about PUCCH the M bar arranged, these records are sorted and handle, obtain the distribution curve CDF of RS and PUCCH respectively
RSAnd CDF
Pucch
Respectively with the value at 5% place of distribution curve as the SRS of cell edge, the signal power of PUCCH, be respectively P
RSAnd P
Pucch
Judge both difference DELTA P=P
SRS-P
Pucch, find
Determine the coverage of the coverage of PUCCH greater than SRS.
Because the coverage of PUCCH greater than the coverage of SRS, reduces value so and is
Because P
O_nomial_pucchBe present among the IE of UplinkPowerControl, upgrade this parameter among this IE, and upgrade all SIB message relevant, and utilize RRC message informing UE to carry out parameter update with this IE.
From the foregoing description as can be seen: the embodiment of the invention is determined the difference of SRS power and physical uplink channel power, described SRS power is the signal power that terminal sends SRS, and described physical uplink channel power is terminal receives and sends data and control information by the physical uplink channel a signal power; Described difference is adjusted SRS power parameter value or physical uplink channel power parameter value, so that the difference of SRS power and physical uplink channel power is not in described adjusting range in predefined adjusting range the time.
Owing to can adjust with the power parameter value of reference signal or physical uplink channel detection according to the difference of surveying with the power of the power of reference signal and physical uplink channel, make adjusted detection less with the difference of the power of the power of reference signal and physical uplink channel, reduce the inconsistent situation of coverage of each channel, improved the performance of edge termination;
Owing to do not need manually to be provided with parameter, the embodiment of the invention is applicable to SON (Self OrganizingNetworks, in the environment of covering self-organizing network) and capacity self-optimizing, also be applicable in the environment of the coverage optimization of LTE (LongTerm Evolution, Long Term Evolution) and follow-up evolution system (as LTE+ etc.) thereof;
Simultaneously, avoided bigger modification, made things convenient for the equipment realization of equipment manufacturers and the enforcement of operator existing standard.
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, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (18)
1. a method of adjusting power parameter value is characterized in that, this method comprises:
Determine to survey the difference with reference signal SRS power and physical uplink channel power, described SRS power is the signal power that terminal sends SRS, and described physical uplink channel power is that terminal is passed through the signal power that the physical uplink channel sends data or control information;
Described difference is adjusted SRS power parameter value or physical uplink channel power parameter value, so that the difference of SRS power and physical uplink channel power is not in described adjusting range in predefined adjusting range the time.
2. the method for claim 1 is characterized in that, determines that according to the following step described difference is in predefined adjusting range:
During greater than first threshold or less than second threshold value, determine that described difference is in predefined adjusting range in described difference;
Described first threshold is greater than described second threshold value.
3. method as claimed in claim 2 is characterized in that, described adjustment SRS power parameter value comprises:
Determine the scope of path loss penalty coefficient adjustment amount, and from this scope, determine the value of a value as path loss penalty coefficient adjustment amount;
According to the value of the path loss penalty coefficient adjustment amount of determining, the value of the exclusive normalized parameter in sub-district in the value of the path loss penalty coefficient in the adjustment SRS power parameter and the base station expectation received power;
The value of wherein adjusted path loss penalty coefficient is a value in the set of path loss penalty coefficient.
4. method as claimed in claim 3 is characterized in that, during greater than first threshold, determines the scope of path loss penalty coefficient adjustment amount in described difference according to following formula:
ΔP-Δα×(PL
0-PL)＜Th
max；
During less than second threshold value, determine the scope of path loss penalty coefficient adjustment amount in described difference according to following formula:
ΔP-Δα×(PL
0-PL)＞Th
min；
Wherein, Δ P is the difference of SRS power and physical uplink channel power, and Δ α is a path loss penalty coefficient adjustment amount, PL
0Be the reference path loss of sub-district, PL is the descending path loss that terminal is estimated, Th
MaxBe first threshold, Th
MinIt is second threshold value.
5. method as claimed in claim 3 is characterized in that, the value of adjusting the path loss penalty coefficient in the SRS power parameter comprises:
With the value of definite path loss penalty coefficient adjustment amount and the value addition of the path loss penalty coefficient in the SRS power parameter, the value that obtains is as the value of the path loss penalty coefficient in the adjusted SRS power parameter;
Adjust the value of the exclusive normalized parameter in sub-district in the expectation received power of base station according to following formula:
Adjusted P
O_Nominal_PUSCH=current P
O_Nominal_PUSCH-Δ α * PL
0
P
O_NOMINAL_PUSCHBe the exclusive normalized parameter in sub-district in the expectation received power of base station, Δ α is a path loss penalty coefficient adjustment amount, PL
0It is the reference path loss of sub-district.
6. method as claimed in claim 2 is characterized in that, described adjustment physical uplink channel power parameter value comprises:
Adjust the value of the exclusive normalized parameter in sub-district in the base station expectation received power in the physical uplink channel power parameter, the value of the exclusive normalized parameter in sub-district is between the first threshold and second threshold value in the expectation received power of adjusted base station.
7. as the described method of the arbitrary claim of claim 1～6, it is characterized in that described physical uplink channel is PUSCH;
The difference of SRS power and PUSCH power is determined according to following formula:
P
srs-P
pusch＝P
srs_offset+10log
10(M
srs)-10log
10(M
pusch)-Δ
TF(i)；
Wherein, P
SrsBe SRS power, P
PuschBe PUSCH power, P
Srs_offsetBe the power offset values of uplink pilot signal, M
SrsBe the SRS transmission bandwidth of subframe, M
PuschBe the transmission bandwidth of PUSCH, Δ
TF(i) be the gain of transformat.
8. as the described method of the arbitrary claim of claim 1～6, it is characterized in that described physical uplink channel is Physical Uplink Control Channel PUCCH;
The difference of described definite SRS power and PUCCH power comprises:
Determine in the setting-up time that edge termination sends the signal power of SRS and edge termination receives data by PUCCH signal power;
According to the signal power of the SRS that determines, and the signal power of the PUCCH that determines, determine the difference of SRS power and PUCCH power.
9. as the described method of the arbitrary claim of claim 1～6, it is characterized in that, also comprise after described adjustment SRS power parameter or the physical uplink channel power parameter:
According to adjusted SRS power parameter or physical uplink channel power parameter, the relevant information unit IE among the in-band signalling SIB of update system message, and the adjusted information of notice terminal.
10. an equipment of adjusting power parameter value is characterized in that, this equipment comprises:
The difference determination module, be used for determining to survey the difference of using reference signal SRS power and physical uplink channel power, described SRS power is the signal power that terminal sends SRS, and described physical uplink channel power is that terminal is passed through the signal power that the physical uplink channel sends data and control information;
Adjusting module is used for described difference when predefined adjusting range, adjusts SRS power parameter value or physical uplink channel power parameter value, so that the difference of SRS power and physical uplink channel power is not in described adjusting range.
11. equipment as claimed in claim 10 is characterized in that, described equipment also comprises:
Trigger module is used for, determining described difference in predefined adjusting range, and triggering described adjusting module and adjust processing during greater than first threshold or less than second threshold value in described difference;
Described first threshold is greater than described second threshold value.
12. equipment as claimed in claim 11 is characterized in that, described adjusting module is used for:
When adjusting the SRS power parameter value, determine the scope of path loss penalty coefficient adjustment amount, and from this scope, determine the value of a value as path loss penalty coefficient adjustment amount, according to the value of the path loss penalty coefficient adjustment amount of determining, the value of the exclusive normalized parameter in sub-district in the value of the path loss penalty coefficient in the adjustment SRS power parameter and the base station expectation received power;
The value of wherein adjusted path loss penalty coefficient is a value in the set of path loss penalty coefficient.
13. equipment as claimed in claim 12 is characterized in that, during greater than first threshold, described adjusting module is determined the scope of path loss penalty coefficient adjustment amount according to following formula in described difference:
ΔP-Δα×(PL
0-PL)＜Th
max；
During less than second threshold value, described adjusting module is determined the scope of path loss penalty coefficient adjustment amount according to following formula in described difference:
ΔP-Δα×(PL
0-PL)＞Th
min；
Wherein, Δ P is the difference of SRS power and physical uplink channel power, and Δ α is a path loss penalty coefficient adjustment amount, PL
0Be the reference path loss of sub-district, PL is the descending path loss that terminal is estimated, Th
MaxBe first threshold, Th
MinIt is second threshold value.
14. equipment as claimed in claim 12, it is characterized in that, described adjusting module is with the value of definite path loss penalty coefficient adjustment amount and the value addition of the path loss penalty coefficient in the SRS power parameter, and the value that obtains is as the value of the path loss penalty coefficient in the adjusted SRS power parameter;
Described adjusting module is adjusted the value of the exclusive normalized parameter in sub-district in the expectation received power of base station according to following formula:
Adjusted P
O_Nominal_PUSCH=current P
O_Nominal_PUSCHOne Δ α * PL
0
P
O_NOMINAL_PUSCHBe the sub-district expectation received power, Δ α is a path loss penalty coefficient adjustment amount, PL
0It is the reference path loss of sub-district.
15. equipment as claimed in claim 11 is characterized in that, described adjusting module is used for:
When adjusting physical uplink channel power parameter value, adjust the value of the exclusive normalized parameter in sub-district in the base station expectation received power in the physical uplink channel power parameter, the value of the exclusive normalized parameter in sub-district is between the first threshold and second threshold value in the expectation received power of adjusted base station.
16., it is characterized in that the physical uplink channel is PUSCH as the described equipment of the arbitrary claim of claim 10～15;
Described difference determination module is determined the difference of SRS power and PUSCH power according to following formula:
P
srs-P
pusch＝P
srs_offset+10log
10(M
srs)-10log
10(M
pusch)-Δ
TF(i)；
Wherein, P
SrsBe SRS power, P
PuschBe PUSCH power, P
Srs_offsetBe the power offset values of uplink pilot signal, M
SrsBe the SRS transmission bandwidth of subframe, M
PuschBe the transmission bandwidth of PUSCH, Δ
TF(i) be the gain of transformat.
17., it is characterized in that described difference determination module is used for as the described equipment of the arbitrary claim of claim 10～15:
Described physical uplink channel is Physical Uplink Control Channel PUCCH, determine that setting-up time inward flange terminal sends the signal power of SRS and edge termination receives data by PUCCH signal power, according to the signal power of the signal power of the SRS that determines and definite PUCCH, determine the difference of SRS power and PUCCH power.
18., it is characterized in that described equipment also comprises as the described equipment of the arbitrary claim of claim 10～15:
Notification module, be used for after described adjusting module is adjusted SRS power parameter or physical uplink channel power parameter, according to adjusted SRS power parameter or physical uplink channel power parameter, relevant information unit IE among the in-band signalling SIB of update system message, and the adjusted information of notice terminal.
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