CN104170269A - Power control method, base station and user equipment - Google Patents

Power control method, base station and user equipment Download PDF

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Publication number
CN104170269A
CN104170269A CN201280021137.4A CN201280021137A CN104170269A CN 104170269 A CN104170269 A CN 104170269A CN 201280021137 A CN201280021137 A CN 201280021137A CN 104170269 A CN104170269 A CN 104170269A
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user equipment
base station
power
pairing
users
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CN104170269B (en
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刘建琴
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention is applicable in the technical field of mobile communications, and provided are a power control method, a base station and user equipment. The method comprises: when using a modulation and coding scheme of 256 quadrature amplitude modulation (QAM), a base station generating a power rollback value m, m being a real number which is not equal to 0; and the base station conducting power rollback on the power of a transmitting signal transmitted to user equipment based on m. When the base station uses a modulation and coding scheme of 256 QAM, the present invention conducts rollback on the transmitting power of the base station by a power rollback value m, wherein m is a real number which is not equal to 0, and ensures that a PA can operate in a linear region.

Description

Power control method, base station and user equipment
Specification
A kind of Poewr control method, base station and user equipment
Technical field
The invention belongs to mobile communication technology field, more particularly to a kind of Poewr control method, base station and user equipment.Background technology
With the development of mobile communication technology, the large scale deployment of 3G network, the positive band of business of the big bandwidth of high-speed gives people colourful application experience, people to freedom, high-speed, high quality communications pursuit also will be endless.It was predicted that the five-year mobile data services traffic demand will increase by 40 times, average annual 8-10 times of increase.Legacy cellular mobile communication be to cover greatly, high mobility as main design goal, and in outdoor environment, radio link performance has approached shannon limit.Statistics shows that more than 80% data service occurs indoors, indoor distinctive low speed, short distance, rich scatter channel environment, is that the further radio link performance that improves opens new space.
Requirement of the user to data rate is very high under indoor and focus environment, and total flow demand is larger.To reach these demands, adoptable technology includes：
1st, using the modulation system of higher order, such as 256 quadrature amplitude modulations（Quadrature Amplitude Modulation, QAM), it can lift spectrum efficiency using 256QAM.
However, error vector magnitude (Error Vector Magnitude, the EVM) requirement of high order modulation realizes it is a challenge to hardware, device capabilities and the cost determination feasibility of 256QAM applications.
2nd, time division duplex (Time Division Duplexing, TDD) service adaptation subframe is matched, and can increase available resources.
At present, Long Term Evolution (Long Term Evolution, LTE) has been defined for 7 kinds of TDD ratio of uplink subframe to downlink subframe, and these proportionings are matched from different up-downgoing business proportions respectively.
Traditional TDD system interferes in order to avoid up-downgoing, and adjacent macro base station must use identical to match somebody with somebody Than, it is ensured that synchronization.And under the conditions of distal end radio node (Remote Radio Head, RRH) low transmitting power, it is possible to achieve the ratio of uplink subframe to downlink subframe of cell-level, it is possible to which the service traffics demand in real network is changed.The TDD subframes proportioning of service adaptation can effectively lifting system capacity, and preferably provide high rate user experience.
Meanwhile, the introducing of TDD service adaptations proportioning can cause interference with the more diversification of environment and interference source, and user equipment and RRH transmission power are suitable（Be 23dBm) scene under, the interference of uplink versus downlink may be especially serious, because in single-carrier frequency division multiple access（Single-carrier Frequency-Division Multiple Access, SC-FDMA) under, the upward signal of user equipment is generally launched on arrowband, so that the transmission power on unit resource block is higher；And under OFDM (Orthogonal Frequency Division Multiple Access, OFDMA), RRH downstream signal is launched in whole system bandwidth, so that the relatively low of transmission power on unit resource block
Under TDD service adaptations subframe proportioning scene, the asymmetry of the power spectral density of upward signal and downstream signal on unit resource block will cause larger interference of the downstream signal by upward signal, especially under uplink multi-users pairing scene, if the total transmission power to all pairing users on scheduling resource block is not limited, downstream signal will be caused by the relatively strong jamming of upward signal, so as to be correctly received, the UE 4 of the UE3 and AP2 boundaries in API boundaries downstream signal is by by the larger interference of AP3 UE1 and UE2 upward signal as shown in Figure 1.
For 256QAM modes, in order to solve requirements of the EVM to hardware of high order modulation, the method that prior art is used is：
RRH is in 256QAM modulation coding modes, and identical back-off mechanism during using with 16QAM/64QAM, the i.e. transmission power to user used retract, the back-off valueffsetMeet：
PA A[dB] 0Γ ΡΒ = ^ POWER_OFFSET + PB [dB]
Wherein, A, A assumes that the ratio of the every resource unit power (Energy Per Resource Element, EPRE) and every resource unit power of traffic data channel on the symbol comprising public guide frequency of traffic data channel on the symbol not comprising public guide frequency respectively. Wherein,.WCT—。ffsetExcept multi-user's multiple-input and multiple-output（Multi-user multiple-input-multiple-output, MU-MIMO) it is defaulted as under all transmission modes outside pattern
0
This method can bring higher peak-to-average power ratio (peak-to-average power ratio, PAPR) so that power amplifier（Power Amplifier, PA) cisco unity malfunction is in linear zone.
For under TDD service adaptations subframe proportioning and uplink multi-users pairing scene, the transmission power of user equipment is still set according to standard TS36.213：
π I corpse CMAX,C W
[10 log10 (MPUSCH c (0) + P0_PUSCH,C (i) + ac (j) · PL + (i) + fc
Wherein, (it is total transmission power of the user equipment on main serving cell carrier wave c；
MPUSCH, '）For Physical Uplink Shared Channel（Physical Uplink Shared Channel, PUSCH) scheduling resource block number mesh, unit is Physical Resource Block (Physical Resource Block, PRB);
Corpse O-PUSCH'c (J) includes the target received power that corpse O-NOM L-PUSCH'c (J) and corpse O-UE-PUSCH ' c (J) two are user equipment, is semi-statically configured by high-rise RRC signaling；
" '）It is road loss compensation factor, is semi-statically configured by high-rise RRC signaling；
P is path loss measured value of the user equipment based on RSRP；
Ar^c ( ) = 101og10((2^-AC are the power adjustments to different modulation coding modes, are semi-statically configured by high-rise RRC signaling；
《Closed power adjustment amount, be receiving terminal according to reception/amount of measurement error dissolve come value of feedback.
At the down receiving signal of user equipment especially cell boarder, the downstream signal of user equipment is by adjacent area upward signal not in the same direction（Upward signal when especially multi-user matches）Larger interference, and this interference dynamically changeable.
And parameter such as ^ that the setting formula of the transmission power of above-mentioned user equipment includes (,P0_PUSCH, c (i) etc. are what RRC high-level signalings were semi-statically configured, it is impossible to realize the fast velocity modulation of dynamic to user equipment transmitting power It is whole.And uniquely can by Physical Downlink Control Channel (Physical Downlink Control Channel,
PDCCH) dynamic configuration and the power control commands word of adjustmentWAdjusting step it is limited, single adjusting range include { -4, -1,0,1,3,4 }, so that the purpose that all pairing users on unit resource block are adjusted rapidly with total transmission power can not be realized.
In summary, although the Poewr control method that prior art is provided can effectively lift spectrum efficiency and support high speed data transfer, but higher peak-to-average power ratio can be brought simultaneously, so that power amplifier cisco unity malfunction is in linear zone, in addition, under TDD service adaptations subframe proportioning and uplink multi-users pairing scene, especially at cell boarder, the downstream signal of user equipment greatly reduces the quality of reception of downstream signal by the larger interference of adjacent area upward signal not in the same direction.Technical problem
The embodiments of the invention provide a kind of Poewr control method, base station and user equipment, it is intended to which higher peak-to-average power ratio can be brought by solving the Poewr control method of prior art offer so that power amplifier cisco unity malfunction is the problem of linear zone.Technical solution
On the one hand there is provided a kind of Poewr control method, methods described includes：
When base station use 256 quadrature amplitude modulation QAM modulation coding mode when, generation one back-off value be, the m be not equal to 0 real number；
Back-off is carried out to the power launched to the transmission signal of user based on the m by the base station.On the other hand there is provided a kind of base station, the base station includes：
When back-off value generation unit, modulation coding mode for using 256 quadrature amplitude modulation QAM when base station, one back-off value of generation is m, the m be not equal to 0 real number；
Power control unit, for carrying out back-off to the power launched to the transmission signal of user based on the m.
Another further aspect includes there is provided a kind of Poewr control method, methods described： Pairing user equipment receives the pairing number of users N that base station is issued;
The transmission power of the pairing user equipment is determined according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c.
On the other hand there is provided a kind of user equipment, the user equipment includes：
Number of users receiving unit is matched, for receiving the pairing number of users N that base station is issued;
Transmitting power control unit, the transmission power for determining the pairing user equipment according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c.Beneficial effect
In embodiments of the present invention, when base station use 256QAM modulation coding mode when, the transmission power of base station is retracted by back-off value m, wherein m be not equal to 0 real number, it is ensured that PA can be operated in the range of linearity.Brief description of the drawings
Fig. 1 is the implementation process figure for the Poewr control method that the embodiment of the present invention one is provided
Fig. 2 is the implementation process figure for the Poewr control method that the embodiment of the present invention two is provided
Fig. 3 is the implementation process figure for the Poewr control method that the embodiment of the present invention three is provided
Fig. 4 is the implementation process figure for the Poewr control method that the embodiment of the present invention four is provided
Fig. 5 is the implementation process figure for the Poewr control method that the embodiment of the present invention five is provided
Fig. 6 is the structured flowchart for the base station that the embodiment of the present invention six is provided；
Fig. 7 is the structured flowchart for the user equipment that the embodiment of the present invention seven is provided.Embodiments of the present invention
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with drawings and Examples, the present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention. In embodiments of the present invention, when base station uses 256 quadrature amplitude modulation QAM modulation coding mode, by the base station based on the back-off value previously generated be m to launch to the transmission signal of user power carry out back-off, the m be not equal to 0 real number.
Below in conjunction with：
Embodiment one
Fig. 1 shows the implementation process for the Poewr control method that the embodiment of the present invention one is provided, and down transmitting power can be controlled by base station by the Poewr control method, details are as follows：
In step S101, when base station uses 256 quadrature amplitude modulation QAM modulation coding mode, one back-off value of generation is m, the m be not equal to 0 real number.
Descending power in current LTE is adjusted：It is assumed that every resource unit power invariability of down public guide frequency is constant, the adjustment to traffic data channel per resource unit power is realized indirectly by adjusting every resource unit power of downlink service data channel and every resource unit the power ratio ^ and ^ (corresponding to every resource unit power ratio on the resource symbol not comprising public guide frequency and the resource symbol comprising public guide frequency respectively) of public guide frequency.
In vertical, PA=^ WB] PB = + 5[dB] be with Lu's equipment under different transmission mode and modulation coding mode relative to benchmark or relative adjustment amount, at present in addition to MU-MIMO transmission mechanism, this value is disposed as 0
In the present embodiment, the ^ activated business in every resource unit power of data channel and every resource unit the power ratio ^ and ^ of public guide frequency to { m, 0 }, wherein, back-off value using m as base station under 256QAM modulation coding modes, m be not equal to 0 real number；And 0 is back-off value of the base station under other modulation coding modes.
Specifically, m determination method is：Base station determines the back-off value m required when base station jumps to 256 QAM from other low-order-modulated modes according to the EVM demands or Signal to Interference plus Noise Ratio demand under different modulating coded system
It is assumed that 256QAM EVM or Signal to Interference plus Noise Ratio demand are a, and the EVM or Signal to Interference plus Noise Ratio demand of the low-order-modulated mode redirected are b, then m=101ogl0 (b/a) or m=101ogl0 (a/b).If base station is in 64 QAM Under EVM demands be 8%, and the EVM demands under 256 QAM are 4%, now when base station jumps to 256QAM from 64 QAM, the upper and lower bound of required back-off value is respectively -101oglO (8%/4%) dB and 101oglO (8%/4%) dB, and the back-off value for jumping to 256QAM from other modulation coding modes similar can be determined.
In step s 102, back-off is carried out to the power launched to the transmission signal of user equipment based on the m by the base station.
The present embodiment, when base station use 256QAM modulation coding mode when, the transmission power of base station is retracted by back-off value m, wherein m be not equal to 0 real number, it is ensured that PA can be operated in the range of linearity.
Embodiment two
Fig. 2 shows the implementation process for the Poewr control method that the embodiment of the present invention two is provided, and down transmitting power can be controlled by base station by the Poewr control method, details are as follows：
In step s 201, when base station uses 256 quadrature amplitude modulation QAM modulation coding mode, one back-off value of generation is m, the m be not equal to 0 real number.
In embodiments of the present invention, when base station operation is under SC-FDMA, the data after 256QAM modulating-codings are placed in some special subframes and are transmitted.Now, in these special subframes, base station retracts to the transmission power of all users.Specific m determination mode refers to the description in embodiment one, will not be repeated here.
In step S202, when base station operation is under single-carrier frequency division multiple access SC-FDMA, back-off is carried out to the power launched to the transmission signal of all user equipmenies in the subframe of the data by the base station based on the m after transmission 256 quadrature amplitude modulation QAM modulations coding.
The present embodiment, when base station uses 256QAM modulation coding mode, and when being operated under SC-FDMA, back-off is carried out to the power launched to the transmission signal of all user equipmenies in the subframe of the data after transmitting 256 quadrature amplitude modulation QAM modulations coding by back-off value m, wherein m be not equal to 0 real number, it is ensured that PA can be operated in the range of linearity.
Embodiment three Fig. 3 shows the implementation process for the Poewr control method that the embodiment of the present invention three is provided, and down transmitting power can be controlled by base station by the Poewr control method, details are as follows：
In step S301, when base station uses 256 quadrature amplitude modulation QAM modulation coding mode, one back-off value of generation is m, the m be not equal to 0 real number.
In the present embodiment, when base station operation is under OFDMA, the data after 256QAM modulating-codings are transmitted without specially reserved subframe, this means on the corresponding running time-frequency resource of each subframe built-in system bandwidth, the existing user using 256 QAM modulation coded systems, there is the user using other modulation coding modes again.Specific m determination mode refers to the description in embodiment one, will not be repeated here.It is limited to gather { -6, -4.77, -3 in view of difference power scopes of the PA in different frequency domain resources, -1.77,0,1,2,3 } the upper bound and lower bound, so the scope that above-mentioned m value should cause is no more than set { -3, -2, -1,0,1.77,3,4.77,6 } the upper bound and lower bound.
In step s 302, when base station operation is under OFDM OFDMA, back-off is carried out to the power for launching the transmission signal of the user equipment to 256QAM modulation coding modes based on the m by the base station.
The present embodiment, when base station uses 256QAM modulation coding mode, and when being operated under OFDMA, back-off is carried out to the power for launching the transmission signal of the user equipment to 256QAM modulation coding modes by back-off value m, wherein m be not equal to 0 real number, it is ensured that PA can be operated in the range of linearity.
Example IV
Fig. 4 shows the implementation process for the Poewr control method that the embodiment of the present invention four is provided, down transmitting power can be controlled by base station by the Poewr control method, transmission power that can also be by user equipment to up transmitting to base station is controlled, and details are as follows：
In step S401, when base station uses 256 quadrature amplitude modulation QAM modulation coding mode, one back-off value of generation is m, the m be not equal to 0 real number.
In step S402, back-off is carried out to the power launched to the transmission signal of user equipment based on the m by the base station. In the present embodiment, when base station operation is under single-carrier frequency division multiple access SC-FDMA, back-off is carried out to the power launched to the transmission signal of all user equipmenies in the subframe of the data by the base station based on the advance m after transmission 256 quadrature amplitude modulation QAM modulations coding.
When base station operation is under OFDM OFDMA, back-off is carried out to the power for launching the transmission signal of the user equipment to 256QAM modulation coding modes based on the m by the base station.
Specific m determination mode refers to the description in embodiment one, will not be repeated here.
In step S403, when base station operation is under TDD service adaptation subframe proportioning and uplink multi-users pairing scene, pairing number of users N is issued to user equipment is matched by base station, to determine the transmission power of the pairing user equipment according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c by the pairing user equipment.
In the present embodiment, matched when base station operation is matched in TDD service adaptation subframe with uplink multi-users under scene, and the base station is low-power（23dBm) during small station, the base station in ascending time slot is according to the channel condition information measured（Channel State Information, CSI the scheduling of upstream data) is carried out, and the total number of users N for launching data on every resource block simultaneously is handed down to each pairing user equipment, pairing user equipment is based on this N value, the transmission power ^ of oneself is set using formula belowSCT。( ) : roscH,c( = min
| l01og10 (MPUSCH c (0) + ^o_PuscH,c (i) + «C (J) · PL + ATFiC (i) + fc(i) wherein, pCMAX, ω is total transmission power of the user equipment on main serving cell carrier wave C；
MpuscHFor Physical Uplink Shared Channel PUSCH scheduling resource block number mesh, unit is Physical Resource Block PRB;
^0_PUSCH, c (i) include corpse.- NOMINAL-PUSCH, c (J') and ^0_UE_PUSCH, c (i) two, are the target received power of user equipment, are semi-statically configured by high-rise wireless heterogeneous networks agreement RRC signaling；
a^j)It is road loss compensation factor, is semi-statically configured by high-rise RRC signaling；
P is path loss measured value of the user equipment based on Reference Signal Received Power RSRP；
β0 Ρ Η) it is power adjustment to different modulation coding modes, It is semi-statically configured by high-rise RRC signaling；
Closed power adjustment amount, be receiving terminal according to reception/amount of measurement error dissolve come value of feedback.
The present embodiment, when base station operation is under TDD service adaptation subframe proportioning and uplink multi-users pairing scene, pairing number of users N is issued to each pairing user equipment by base station, the limitation that user equipment carries out user emission power according to the pairing number of users N is matched by described again, the quick upward signal for reducing user's transmission can be reached to low-power（The purpose for the downstream signal interference that 23dBm) base station is sent.
Embodiment five
Fig. 5 shows the implementation process for the Poewr control method that the embodiment of the present invention five is provided, and this method is that the transmission power to up transmitting to base station is controlled by user equipment, and details are as follows：
In step S501, the pairing number of users N that base station is issued is received.
In the present embodiment, pairing user equipment receives the pairing number of users N that base station is issued.
In step S502, the transmission power of the pairing user equipment is determined according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c.
In the present embodiment, pairing user equipment determines to match the transmission power of user equipment according to equation below
•^PUSCH.c (') * + corpse.PUSCH, ) + c ( j) · PL + ATF,c (i) + fcWherein, PCMAX, (it is total transmission power of the user equipment on main serving cell carrier wave C；
MPUSCH,.《For Physical Uplink Shared Channel puSCH scheduling resource block number mesh, unit is Physical Resource Block PRB;
^0_PUSCH, c (i) include corpse.- NOMINAL-PUSCH, c (J') and ^0_UE_PUSCH, c (i) two, are the target received power of user equipment, are semi-statically configured by high-rise wireless heterogeneous networks agreement RRC signaling；
a^j)It is road loss compensation factor, is semi-statically configured by high-rise RRC signaling；
P is path loss measured value of the user equipment based on Reference Signal Received Power RSRP； ) it is power adjustment to different modulation coding modes, it is semi-statically configured by high-rise RRC signaling；
Closed power adjustment amount, be receiving terminal according to reception/amount of measurement error dissolve come value of feedback.
The present embodiment, when base station operation is under TDD service adaptation subframe proportioning and uplink multi-users pairing scene, the pairing number of users N that user equipment is issued according to base station carries out the limitation of user emission power, and the quick upward signal for reducing user's transmission can be reached to low-power（The purpose for the downstream signal interference that 23dBm) base station is sent.
Embodiment six
Fig. 6 shows the concrete structure block diagram for the base station that the embodiment of the present invention six is provided, and for convenience of description, illustrate only the part related to the embodiment of the present invention.The base station 6 includes：Back-off value generation unit 61 and power control unit 62.
Back-off value generation unit 61, for when base station use 256 quadrature amplitude modulation QAM modulation coding mode when, one back-off value of generation is m, the m be not equal to 0 real number, the value of the m determines by the error vector magnitude EVM demands or Signal to Interference plus Noise Ratio demand under different modulating coded system.Specific m determination mode refers to the description in embodiment one, will not be repeated here；
Power control unit 62, for carrying out back-off to the power launched to the transmission signal of user equipment based on the m.
Specifically, the power control unit 62 includes the first power control module and/or power control unit.Wherein, first power control module, for when base station operation is under single-carrier frequency division multiple access SC-FDMA, back-off to be carried out to the power launched to the transmission signal of all user equipmenies in the subframe of the data by the base station based on the m after transmission 256 quadrature amplitude modulation QAM modulations coding；
Second power control module, for when base station operation is under OFDM OFDMA, back-off is carried out to the power for launching the transmission signal of the user equipment to 256QAM modulation coding modes based on the m by the base station, the value of the m is no more than set { -3, -2, -1,0,1.77,3,4.77,6 } the upper bound and lower bound. Further, the power control unit 62 also includes：Pairing number of users issues module, the module is used for when base station operation is under TDD service adaptation subframe proportioning and uplink multi-users pairing scene, pairing number of users N is issued to user equipment is matched by base station, to determine the transmission power of the pairing user equipment according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c by the pairing user equipment.
Base station provided in an embodiment of the present invention can be applied in foregoing corresponding embodiment of the method one, two, three, four, and details will not be repeated here referring to the description in above-described embodiment one, two, three, four.
Embodiment seven
Fig. 7 shows the concrete structure block diagram for the user equipment that the embodiment of the present invention seven is provided, and for convenience of description, illustrate only the part related to the embodiment of the present invention.The user equipment 7 includes pairing number of users receiving unit 71 and transmitting power control unit 72.
Wherein, pairing number of users receiving unit 71, for receiving the pairing number of users N that base station is issued;
Transmitting power control unit 72, the transmission power for determining the pairing user equipment according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c.
Specifically, the transmitting power control unit 72 includes：Transmission power control module, the module is used for the transmission power that the pairing user equipment is determined according to following formulaPpuscH»：
Pc
101og10 (MPUSCH c (0) + ^o_PuscH,c (i) + ac ( f) · PL + ATF c ( ) + fc() wherein,PCMAX) it is total transmission power of the pairing user equipment on main serving cell carrier wave c；
MpuscHFor Physical Uplink Shared Channel PUSCH scheduling resource block number mesh, unit is Physical Resource Block PRB;
^0_PUSCH, c (i) include corpse.- NOMINAL-PUSCH, c (J') and ^0_UE_PUSCH, c (i) two, are the target received power of user equipment, are semi-statically configured by high-rise wireless heterogeneous networks agreement RRC signaling；
a^j)It is road loss compensation factor, is semi-statically configured by high-rise RRC signaling；
It is path loss measured value of the user equipment based on Reference Signal Received Power RSRP； ) it is power adjustment to different modulation coding modes, it is semi-statically configured by high-rise RRC signaling；
Closed power adjustment amount, be receiving terminal according to reception/amount of measurement error dissolve come value of feedback.
User equipment provided in an embodiment of the present invention can be applied in foregoing corresponding embodiment of the method five, and details will not be repeated here referring to the description of above-described embodiment five.
It is worth noting that, in said system embodiment, included unit is simply divided according to function logic, but is not limited to above-mentioned division, as long as corresponding function can be realized；In addition, the specific name of each functional unit is also only to facilitate mutually distinguish, the protection domain being not intended to limit the invention.
In addition, one of ordinary skill in the art will appreciate that realizing that all or part of step in the various embodiments described above method can be by program to instruct the hardware of correlation to complete, corresponding program can be stored in a computer read/write memory medium, described storage medium, such as ROM/RAM, disk or CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., should be included in the scope of the protection.

Claims (1)

  1. Claims
    1st, a kind of Poewr control method, it is characterised in that methods described includes：
    When base station uses 256 quadrature amplitude modulation QAM modulation coding mode, one back-off value of generation is m, the m be not equal to 0 real number；
    Back-off is carried out to the power launched to the transmission signal of user equipment based on the m by the base station.
    2nd, the method as described in claim 1, it is characterized in that, it is described when base station use 256 quadrature amplitude modulation QAM modulation coding mode when, by the base station based on the m to launch to the transmission signal of user equipment power carry out back-off be specially：
    When base station operation is under single-carrier frequency division multiple access SC-FDMA, back-off is carried out to the power launched to the transmission signal of all user equipmenies in the subframe of the data by the base station based on the m after transmission 256 quadrature amplitude modulation QAM modulations coding.
    3rd, the method as described in claim 1, it is characterized in that, it is described when base station use 256 quadrature amplitude modulation QAM modulation coding mode when, by the base station based on the m to launch to the transmission signal of user equipment power carry out back-off be specially：
    When base station operation is under OFDM OFDMA, back-off is carried out to the power for launching the transmission signal of the user equipment to 256QAM modulation coding modes based on the m by the base station.
    4th, the method as described in claim 1, it is characterised in that the value of the m is determined by the error vector magnitude EVM demands or Signal to Interference plus Noise Ratio demand under different modulating coded system.
    5th, the method as described in claim 3, it is characterised in that the upper bound of the value of the m no more than set { -3, -2, -1,0,1.77,3,4.77,6 } and lower bound.
    6th, the method as described in claim 1, it is characterised in that methods described also includes：
    When base station operation is under TDD service adaptation subframe proportioning and uplink multi-users pairing scene, pairing number of users N is issued to user equipment is matched by base station, to determine the transmission power of the pairing user equipment according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c by the pairing user equipment. 7th, a kind of base station, it is characterised in that the base station includes：
    When back-off value generation unit, modulation coding mode for using 256 quadrature amplitude modulation QAM when base station, one back-off value of generation is m, the m be not equal to 0 real number；
    Power control unit, for carrying out back-off to the power launched to the transmission signal of user equipment based on the m.
    8th, base station as claimed in claim 7, it is characterised in that the power control unit includes：First power control module, for when base station operation is under single-carrier frequency division multiple access SC-FDMA, back-off to be carried out to the power launched to the transmission signal of all user equipmenies in the subframe of the data after transmitting 256 quadrature amplitude modulation QAM modulations coding based on the m.
    9th, base station as claimed in claim 7, it is characterised in that the power control unit includes：Second power control module, for when base station operation is under OFDM OFDMA, back-off to be carried out to the power for launching the transmission signal of the user equipment to 256QAM modulation coding modes based on the m.
    10th, base station as claimed in claim 7, it is characterised in that the value of the m is determined by the error vector magnitude EVM demands or Signal to Interference plus Noise Ratio demand under different modulating coded system.
    11st, base station as claimed in claim 9, it is characterised in that the upper bound of the value of the m no more than set { -3, -2, -1,0,1.77,3,4.77,6 } and lower bound.
    12nd, base station as claimed in claim 7, it is characterised in that the power control unit also includes：Pairing number of users issues module, for when base station operation is under TDD service adaptation subframe proportioning and uplink multi-users pairing scene, pairing number of users N is issued to user equipment is matched by base station, to determine the transmission power of the pairing user equipment according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c by the pairing user equipment.
    13rd, a kind of Poewr control method, it is characterised in that methods described includes：
    Pairing user equipment receives the pairing number of users N that base station is issued;
    The transmission power of the pairing user equipment is determined according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c. 14th, method as claimed in claim 13, it is characterised in that described to determine that the transmission power for matching user equipment is specially according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c：
    The transmission power of the pairing user equipment is determined according to following formulaPpuscH)：
    „ ,.、 . CMAX,C / W, ]
    ' {l01og10 (Mpusc¾c (0) + Po roscH, ( J) + c (j) - PLc + Amc (0 + fcWherein,PCMAX) it is total transmission power of the pairing user equipment on main serving cell carrier wave c；
    MPUSCH,.《For Physical Uplink Shared Channel PUSCH scheduling resource block number mesh, unit is Physical Resource Block PRB;
    ^0_PUSCH, c (i) include corpse.- NOMINAL-PUSCH, c (J') and ^0_UE_PUSCH, c (i) two, are the target received power of user equipment, are semi-statically configured by high-rise wireless heterogeneous networks agreement RRC signaling；
    " '）It is road loss compensation factor, is semi-statically configured by high-rise RRC signaling；P is path loss measured value of the user equipment based on Reference Signal Received Power RSRP； β0 Ρ Η) it is power adjustment to different modulation coding modes, it is semi-statically configured by high-rise RRC signaling；
    W is closed power adjustment amount, be receiving terminal according to reception/amount of measurement error dissolve come value of feedback.
    15th, a kind of user equipment, it is characterised in that the user equipment includes：
    Number of users receiving unit is matched, for receiving the pairing number of users N that base station is issued;
    Transmitting power control unit, the transmission power for determining the pairing user equipment according to the total transmission power of pairing the number of users N and the pairing user equipment on main serving cell carrier wave c.
    16th, user equipment as claimed in claim 15, it is characterised in that the transmitting power control unit includes：
    Transmission power control module, the transmission power for determining the pairing user equipment according to following formula
    ^PUSCH,c · ^CMAX,c (
    PuscH,e( = min I , N ,
    | l01og10 (MPUSCH c (0) + + «C (J) · Ph + ATFiC (i) + fc(i) wherein, total transmission powers of the ^MA^ W for the pairing user equipment on main serving cell carrier wave c；
    MPUSCH,.《For Physical Uplink Shared Channel PUSCH scheduling resource block number mesh, unit is Physical Resource Block PRB;Corpse.- PUSCH, c (J') include corpse.- NOMINAL-PUSCH, c (J') and ^0_UE_PUSCH, c (i) two, are the target received power of user equipment, are semi-statically configured by high-rise wireless heterogeneous networks agreement RRC signaling； a^j)It is road loss compensation factor, is semi-statically configured by high-rise RRC signaling；
    P is path loss measured value of the user equipment based on Reference Signal Received Power RSRP；
    It is the power adjustment to different modulation coding modes, is semi-statically configured by high-rise RRC signaling；
CN201280021137.4A 2012-08-15 2012-08-15 A kind of Poewr control method, base station and user equipment Active CN104170269B (en)

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