CN102077657B - Power control method, equipment and base station thereof - Google Patents

Power control method, equipment and base station thereof Download PDF

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Publication number
CN102077657B
CN102077657B CN200980123766.6A CN200980123766A CN102077657B CN 102077657 B CN102077657 B CN 102077657B CN 200980123766 A CN200980123766 A CN 200980123766A CN 102077657 B CN102077657 B CN 102077657B
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noise ratio
signal
sirest
target signal
error rate
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CN102077657A (en
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马雪利
李靖
王宗杰
杨波
周欢
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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
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H04W36/385—Reselection control by fixed network equipment of the core network

Abstract

A power control method, equipment and Base Station (BS) are used for realizing transmission power control of control channel while the transmission end sends pilot information on multi Control Channel (M-CH). The method includes: receiving the pilot information sent by the transmission end on the M-CH and one or more data flows which are sent by the transmission end on the T-CH; obtaining several estimation SIRs or reference SIRs according to the pilot information, and obtaining one or more target SIR according to the data flow; comparing the estimation SIR or the reference SIR with the target SIR, and indicating the transmission end to adjust transmission power of the control channel according to the comparison result. By using of the present invention, transmission power control of control channel could be realized when the transmission end sends pilot information on M-CH.

Description

A kind of Poewr control method, device and base station
Technical field
The present invention relates to communication technical field, relate in particular to a kind of Poewr control method, device and base station.
Background technology
WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) system up-link is interference-limited, the transmitting power of other all UE (User Equipment, subscriber equipment) all is to disturb concerning this travelling carriage.Because travelling carriage is random distribution in the residential quarter, the travelling carriage that has is distant from the base station, the travelling carriage that has is closer from the base station, if and all travelling carriages are all adopted identical transmitting power, the closely high-power signal that then receives in the base station will mask the remote low-power level signal that receives, thereby so that remote subscriber's error code is just very large, so just formed near-far interference; On the other hand, the wireless channel of mobile communication has a broadband dynamic frequency band, and these characteristics and mobile subscriber's character is relevant, and usually is subject to the impact of the various rapid fadings of Doppler's (Doppler) fading effect of Radio Link.Under these circumstances, with regard to fast and accurately power control of needs, to guarantee user's service quality.
In the prior art, send the situation existence of pilot frequency information to the power control scheme of control channel for transmitting terminal by a control channel, the inventor feels deeply in the situation of transmitting terminal by a plurality of control channels transmission pilot frequency informations, needs suitable power control scheme.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of Poewr control method, device and base station, in order to send by a plurality of control channels in the situation of pilot frequency information at transmitting terminal, realizes the control to the transmitting power of control channel.
To achieve these goals, the embodiment of the invention provides a kind of Poewr control method, comprising:
The pilot frequency information that receiving end/sending end sends by a plurality of control channels, and described transmitting terminal is by one or more data flow of Traffic Channel transmission;
Obtain a plurality of estimated snrs or a plurality of with reference to signal to noise ratio according to described pilot frequency information, obtain one or more target signal to noise ratio according to described data flow;
To described estimated snr or describedly compare processing with reference to signal to noise ratio and described target signal to noise ratio, and indicate described transmitting terminal that the transmitting power of described control channel is adjusted according to the result of described comparison process.
The embodiment of the invention also provides a kind of output control device, comprising:
Receiver module is used for the pilot frequency information that receiving end/sending end sends by a plurality of control channels, and described transmitting terminal is by one or more data flow of Traffic Channel transmission;
The signal-to-noise ratio (SNR) estimation module is used for obtaining a plurality of estimated snrs or a plurality of with reference to signal to noise ratio according to described pilot frequency information;
The target signal to noise ratio module, the Block Error Rate that is used for described data flow obtains one or more target signal to noise ratio;
The comparison process module is used for described estimated snr that described signal-to-noise ratio (SNR) estimation module is obtained or described target signal to noise ratio with reference to signal to noise ratio and the acquisition of described target signal to noise ratio module compares processing;
Indicating module, the result who is used for the comparison process that obtains according to described comparison process indicates described transmitting terminal that the transmitting power of described control channel is adjusted.
The embodiment of the invention also provides a kind of base station, comprises above-mentioned output control device.
The beneficial effect of the embodiment of the invention is: the technical scheme that the embodiment of the invention provides, to propose by the situation that a plurality of control channels send pilot frequency information for transmitting terminal, the technical scheme that adopts the embodiment of the invention to provide, can be when transmitting terminal sends pilot frequency information by a plurality of control channels, compare processing by receiving terminal by estimated snr or with reference to signal to noise ratio and target signal to noise ratio, and indicate transmitting terminal that the transmitting power of control channel is adjusted, to realize the control to the transmitting power of control channel.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart that Fig. 1 controls for a kind of power that the embodiment of the invention provides;
Fig. 2 is the schematic diagram that UE adopts the up transmit diversity CLTD pattern of two antennas in the prior art;
Fig. 3 is the coding principle figure of STTD pattern in the prior art;
Fig. 4 is the Uplink MIMO schematic diagram that UE adopts two antennas in the prior art;
Fig. 5 is the flow chart of the power control in the one embodiment of the invention;
Fig. 6 is two transmitting antennas and two aerial transmission schematic diagrames that reception antenna is corresponding;
Fig. 7 is the flow chart of the power control in an alternative embodiment of the invention;
Fig. 8 is the flow chart of the power control among another embodiment of the present invention;
Fig. 9 is the block diagram of the output control device in the one embodiment of the invention.
Embodiment
A kind of Poewr control method that the embodiment of the invention provides as shown in Figure 1, may further comprise the steps:
Step 101, the pilot frequency information that receiving end/sending end sends by a plurality of control channels, and transmitting terminal is by one or more data flow of Traffic Channel transmission.
Step 102 obtains a plurality of estimated snrs or a plurality of with reference to signal to noise ratio according to pilot frequency information, obtains one or more target signal to noise ratio according to data flow.
Step 103 compares processing to estimated snr or with reference to signal to noise ratio and target signal to noise ratio, and indicates transmitting terminal that the transmitting power of control channel is adjusted according to the result of comparison process.
As seen, adopt the technical scheme of the embodiment of the invention, can be when transmitting terminal sends pilot frequency information by a plurality of control channels, compare processing by receiving terminal by estimated snr or with reference to signal to noise ratio and target signal to noise ratio, and indicate transmitting terminal that the transmitting power of control channel is adjusted, to realize the control to the transmitting power of control channel.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is described in detail.
With two transmitting antennas, two reception antennas are that example describes in one embodiment of the present of invention.In the present embodiment, up emission can be adopted CLTD (the Closed looptransmit diversity of up transmit diversity, Closed-Loop Transmit Diversity) pattern, STTD (Space time block codingbased transmit antenna diversity, transmission antenna diversity based on space-time block coding) pattern, the single data stream of Uplink MIMO (Multiple Input Multiple Output, multiple-input and multiple-output) or dual data stream pattern etc.
Wherein, the CLTD pattern as shown in Figure 2, uplink physical channel DPDCH (DedicatedPhysical Data Channel, special-purpose physical traffic channels), HS-DPCCH (High-SpeedDedicated Physical Control Channel, High-Speed Dedicated Physical Control Channel), E-DPDCH (E-DCH Dedicated Physical Data Control Channel, E-DCH (EnhancedDedicated Channel, the enhancing dedicated channel) special physical data control channel)) after the scrambling, the weight w1 that obtains with downstream feedback, w2 computes weighted, and obtains two paths of data stream, respectively with DPCCH 1, DPCCH 2As control channel DPCCH (Dedicated Physical ControlChannel, Dedicated Physical Control Channel) at antenna 1And antenna 2Upper emission, the pilot field of the upper transmission of DPCCH, TPC field can be used for power control.
The coding principle of STTD pattern as shown in Figure 3, at antenna 1The uncoded data of upper emission are at antenna 2Data behind the upper launching code, its coding principle can be identical with the coding principle of descending STTD pattern.
Uplink MIMO as shown in Figure 4, two data stream is mapped on two E-DPDCH through processes such as spread spectrum, physical channel mappings, is E-DPDCH 1, E-DPDCH 2, through after the scrambling, precoding weight w1, the w2, w3, the w4 that obtain with downstream message compute weighted, and obtain two paths of data stream after merging in twos, respectively with DPCCH 1, DPCCH 2As control channel, at two transmitting antenna antennas 1And antenna 2Upper transmission.
When the transmit diversity (CLTD pattern, STTD pattern) of up employing two antennas, only has a upstream, two transmitting antennas, two reception antennas.When the MIMO of up employing two antennas, one or two data flow can be arranged.
Present embodiment uses a TPC command word to guarantee this two DPCCH 1, DPCCH 2Transmitting power identical.Poewr control method in the present embodiment as shown in Figure 5, may further comprise the steps:
Step 201, reception antenna 1And antenna 2The DPCCH that sends 1, DPCCH 2, and one or two data flow that sends by Traffic Channel.
NodeB will utilize the pilot tone Pilot field of the DPCCH that transmitting antenna 1 and transmitting antenna 2 launch to carry out SIR (Signal to Interference Ratio, signal to noise ratio) and measure.
As shown in Figure 6, DPCCH 1, DPCCH 2Send at antenna 1 and antenna 2 respectively,, its pilot field is respectively Pilot1, Pilot2, through the transmission of air traffic channel, each DPCCH can be by 2 reception antenna (antennas 3And antenna 4) receive.
Step 202 is carried out the merging of receive diversity, obtains estimated snr SIRest1, the SIRest2 of two pilot tones.
Because the pilot frequency information of each control channel transmission can be received by 2 reception antennas, therefore, need to carry out the merging of receive diversity.For example, a kind of concrete processing procedure of receive diversity is: carry out at first to received signal matched filtering (namely multiply by the spreading code of different delay), obtain a plurality of multipath signals.Then use respectively Beam-former according to certain adaptive algorithm this multipath signal, such as SMI (Sample Matrix Inversion, sample covariance matrix is inverted) algorithm or LMS (Least MeanSquare, lowest mean square) algorithm, carry out space filtering and guaranteeing in the desired orientation signal gain maximumly, according to channel estimating the multipath output signal is merged finally at last and exported.
For example, a kind of acquisition methods of pilot tone estimated snr is: the pilot bit of the up DPCCH of ratio calculation by the received signal power on the code of pilot tone and non-orthogonal interference signal code power and the ratio of noise obtain the pilot tone estimated snr.
Step 203, the weighting of carrying out estimated snr SIRest1, SIRest2 merge a merging estimated snr SIRest who obtains pilot tone.
For example, the method that merges of a kind of weighting can be: the channel estimating that is obtained by pilot signal obtains the weighted value of weighted value, high-rise configuration or weighted value that the base station adaptive algorithm calculates etc.
Step 204 is according to Block Error Rate or target signal to noise ratio SIR_target of frame error rate acquisition of the data flow that receives.
Hereinafter obtain target signal to noise ratio with the Block Error Rate according to the data flow that receives and describe, but when specific implementation, can obtain target signal to noise ratio according to Block Error Rate or the frame error rate of the data flow that receives.
When specific implementation, step 204 and step 202 do not have certain precedence relationship to 203.
In this step, specifically can utilize increases the frame reliability indicator, adds up obtaining BLER such as the CRC check position, is obtained the value of SIR_target by BLER.
When the transmit diversity (CLTD pattern, STTD pattern) of up employing two antennas or MIMO single data stream pattern owing to only have a upstream, therefore, can be directly according to SIR_target of Block Error Rate acquisition of this data flow; When up employing MIMO dual data stream pattern, because two upstreams are arranged, therefore, determine a target signal to noise ratio according to the Block Error Rate of two upstreams, concrete method of operation can for: statistics obtains the block error rate BLER 1 of two data respectively, behind the BLER2, obtains the BLER of two data flow by computing, and Block Error Rate is determined SIR_target thus, and namely two data flow are used same signal-to-noise target value.
According to the block error rate BLER 1 of two data, BLER2 obtains signal-to-noise target value, and the method that can adopt has following several selective.
A, obtain BLER1, the average of BLER2 according to formula (1):
BLER = BLER 1 + BLER 2 2 - - - ( 1 )
B, acquisition BLER1, the maximum among the BLER2: BLER=max (BLER1, BLER2)
C, acquisition BLER1, the minimum value among the BLER2: BLER=min (BLER1, BLER2)
D, obtain according to formula (2) before n BLER1 and BLER2 average statistical:
BLER = Σ n BLER 1 + Σ n BLER 2 2 n - - - ( 2 )
Whether step 205 judges SIRest greater than SIR_target, if carry out step 206, otherwise carry out step 207.
Be appreciated that the i.e. definite magnitude relationship that merges estimated snr and respective objects signal to noise ratio of this step.
Step 206, indication UE reduces DPCCH 1, DPCCH 2Transmitting power.
Specifically can make TPC command word=" 0 ", send to UE by down channel, when UE judges the TPC command word and is 0, reduce simultaneously DPCCH 1, DPCCH 2Transmitting power.
Step 207, indication UE strengthens DPCCH 1, DPCCH 2Transmitting power.
Specifically can make TPC command word=" 1 ", send to UE by down channel, when UE judges the TPC command word and is 1, strengthen DPCCH 1, DPCCH 2Transmitting power.
As seen, the scheme that adopts present embodiment to provide can realize the control to ascending power when two transmitting antennas of up employing send one or two data flow.Situation when the processing mode during wherein, for two data flow of up emission can be extrapolated to a plurality of data flow of up emission.
UE can determine according to the adjustment amount of the transmitting power of control channel the adjustment amount of the transmitting power of Traffic Channel after adjusting the transmitting power of control channel, the transmitting power of Traffic Channel is adjusted.
In the present embodiment, E-DPDCH gain factor β EdAccording to calculating according to formula (1):
β ed＝β c·A ed (1)
Wherein, β cThe gain factor of DPCCH, A EdE-DPDCH power bias for configuration.
Obtaining β cAfter, can adjust Traffic Channel, change the transmitting power of Traffic Channel, reduce near-far interference, ensure user's quality of service.
With two transmitting antennas, two reception antennas are that example describes in an alternative embodiment of the invention.In the present embodiment, up emission can be adopted CLTD (Closed-Loop Transmit Diversity) pattern of up transmit diversity, STTD (based on the transmission antenna diversity of space-time block coding) pattern), the single data stream of Uplink MIMO or dual data stream pattern etc.
Present embodiment uses a TPC command word to guarantee this two DPCCH 1, DPCCH 2Transmitting power identical.Poewr control method in the present embodiment as shown in Figure 7, may further comprise the steps:
Step 301, reception antenna 1And antenna 2The DPCCH that sends 1, DPCCH 2, and one or two data flow that sends by Traffic Channel.
Step 302, reference signal to noise ratio SIRest_ref1, the SIRest_ref2 of two pilot tones of acquisition.
In order to guarantee that Traffic Channel SIR's is stable, in this step, can use the method for estimation of Traffic Channel SIR, be received signal power on the code of computing service channel and the ratio of non-orthogonal interference signal code power, but the power bias that uses control channel DPCCH replaces the power bias of Traffic Channel, by DPCCH 1, DPCCH 2The power bias correspondence obtain with reference to signal to noise ratio SIRest_ref1, SIRest_ref2.
When the power bias of above-mentioned control channel DPCCH replaces the power bias of Traffic Channel, can select following computational methods:
(1) when calculating SIRest_ref1, only the power bias of wherein Traffic Channel E-DPDCH1 is changed to the power bias of control channel DPCCH; When calculating SIRest_ref2, only the power bias of wherein Traffic Channel E-DPDCH2 is changed to the power bias of control channel DPCCH;
(2) when calculating SIRest_ref1, the power bias of all Traffic Channel E-DPDCH1 and E-DPDCH2 all is changed to the power bias of DPCCH; When calculating SIRest_ref2, the power bias of all Traffic Channel E-DPDCH1 and E-DPDCH2 all is changed to the power bias of DPCCH.
Above-mentioned control channel power bias can be obtained by following power bias value:
A, the pilot power biasing of calculating a upper subframe or time slot.
B, by the biasing of high-rise allocating power.
C, according to AG (Absolute Grant, absolute grant)/RG (Relative Grant, relative authorization)/UPH (UE transmission power headroom, the clean transmitting power of UE), calculate pilot power biasing by NodeB.
Step 303 carries out merging the SIRest_ref that obtains pilot tone with reference to the weighting of signal to noise ratio SIRest_ref1, SIRest_ref2.
Step 304 is according to target signal to noise ratio SIR_target of Block Error Rate acquisition of the data flow that receives.
When specific implementation, step 304 and step 302 do not have certain precedence relationship to 303.
Whether step 305 judges SIRest_ref greater than SIR_target, if carry out step 306, otherwise carry out step 307.
Step 306, indication UE reduces DPCCH 1, DPCCH 2Transmitting power.
Specifically can make TPC command word=" 0 ", send to UE by down channel, when UE judges the TPC command word and is 0, reduce simultaneously DPCCH 1, DPCCH 2Transmitting power.
Step 307, indication UE strengthens DPCCH 1, DPCCH 2Transmitting power.
Specifically can make TPC command word=" 1 ", send to UE by down channel, when UE judges the TPC command word and is 1, strengthen DPCCH 1, DPCCH 2Transmitting power.
With two transmitting antennas, two reception antennas are that example describes among another embodiment of the present invention.In the present embodiment, up emission can be adopted the dual data stream pattern of Uplink MIMO.
Present embodiment uses two TPC command words to adjust respectively the transmitting power of control channel and the transmitting power of Traffic Channel, when realizing, determine respectively the reference signal to noise ratio SIRest_ref of each pilot tone and the magnitude relationship of its respective objects signal to noise ratio, and indicate described subscriber equipment that the transmitting power of control channel and Traffic Channel is adjusted according to these two magnitude relationship more out.
Poewr control method in the present embodiment as shown in Figure 8, may further comprise the steps:
Step 401, reception antenna 1And antenna 2The DPCCH that sends 1, DPCCH 2, and two data flow that send by Traffic Channel.
Step 402 obtains reference signal to noise ratio SIRest_ref1, the SIRest_ref2 of two pilot tones (pilot tone 1 and pilot tone 2).
Step 403 is according to Block Error Rate acquisition target signal to noise ratio SIR_target1, the SIR_target2 of two data flow that receive.
Step 404 is determined the value of TPC1 command word according to the magnitude relationship of the magnitude relationship of SIRest_ref1 and SIR_target1 and SIRest_ref2 and SIR_target2.
TPC1 is used to indicate the transmitting power adjustment of control channel.
In this step, the method for determining the magnitude relationship of the magnitude relationship of SIRest_ref1 and SIR_target1 and SIRest_ref2 and SIR_target2 is: calculate respectively
ΔSIRest_ref1＝SIRest_ref1-SIRtarget1；
ΔSIRest_ref2＝SIRest_ref2-SIRtarget2；
And whether determine the estimated snr of each pilot tone greater than 0 or with reference to the magnitude relationship of signal to noise ratio and its respective objects signal to noise ratio according to Δ SIRest_ref1 and Δ SIRest_ref2.
The specific implementation of determining the value of TPC1 command word in this step can be as follows:
Calculate sum Δ SIR_ref=Δ SIRest_ref1+ Δ SIRest_ref2;
If Δ SIRest_ref1＞0, and Δ SIRest_ref2＞0, TPC1=0;
If Δ SIRest_ref1＜0, and Δ SIRest_ref2＜0, TPC1=1;
If Δ SIRest_ref1＞0, if Δ SIRest_ref2＜0 is sum Δ SIR_ref＞0, then TPC1=0;
If Δ SIRest_ref1＞0, if Δ SIRest_ref2＜0 is sum Δ SIR_ref＜0, then TPC1=1;
If Δ SIRest_ref1＜0, if Δ SIRest_ref2＞0 is sum Δ SIR_ref＞0, then TPC1=0;
If Δ SIRest_ref1＜0, if Δ SIRest_ref2＞0 is sum Δ SIR_ref＜0, then TPC1=1;
Other situation is not carried out the power adjustment.
Wherein, TPC1=0 represents that indication reduces DPCCH simultaneously 1, DPCCH 2Transmitting power;
TPC1=1 represents that indication increases DPCCH simultaneously 1, DPCCH 2Transmitting power.
Step 405 is according to the value of the magnitude relationship specified data of dif Δ SIR_ref stream power control word TPC2.
Wherein, dif Δ SIR_ref=Δ SIRest_ref1-Δ SIRest_ref2, TPC2 is used to indicate the relative adjustment of the transmitting power of Traffic Channel, and the specific implementation of this step can be as follows:
If dif Δ SIR＞N, TPC2=0;
If dif Δ SIR＜N, TPC2=1;
If dif Δ SIR=N, not power adjustment;
Wherein N is threshold value, and TPC2 command word=" 0 " is used to indicate the relative power of adjusting major-minor subflow, and boss flows increased power set point Δ PSRPO, auxiliary subflow power reduction Δ PSRPO;
TPC2 command word=" 1 " is used to indicate the relative power of adjusting major-minor subflow, and boss flows power reduction Δ PSRPO, auxiliary subflow the increase of output power Δ PSRPO.
Δ PSRPO represents the relative power adjusted value of major-minor data flow.
Step 403 and step 404 do not have certain sequencing in the present embodiment.
Step 406, TPC1 command word and TPC2 command word are returned UE by down channel, can use the TPC field of two descending F-DPCH (Fractional Dedicated Physical Channel, fractional dedicated physical channel) code channel to issue respectively TPC1 and TPC2.
UE adjusts DPCCH simultaneously according to the TPC1 command word after receiving TPC1 command word and TPC2 command word 1And DPCCH 2Power, adjust data flow E-DPDCH according to the TPC2 command word 1And E-DPDCH 2Relative power, be specifically as follows:
If TPC1 command word=" 0 " reduces DPCCH simultaneously 1And DPCCH 2Power;
If TPC1 command word=" 1 " strengthens DPCCH simultaneously 1And DPCCH 2Power;
If the relative power of major-minor subflow is adjusted in TPC2 command word=" 0 ", boss flows increased power Δ PSRPO, auxiliary subflow power reduction Δ PSRPO;
If the relative power of major-minor subflow is adjusted in TPC2 command word=" 1 ", boss flows power reduction Δ PSRPO, auxiliary subflow the increase of output power Δ PSRPO.
In an embodiment of the present invention, all as an example of two emissions, two antenna receptions example the embodiment of the invention is illustrated, but the embodiment of the invention is not construed as limiting the concrete quantity of antenna.For example, be N for transmitting antenna, upstream is M.Uplink power control can at first merge processing to N estimated snr equally, and then a target signal to noise ratio with M data flow compares, and obtains a TPC control word, to the simultaneously power adjustment of control channel of N transmitting antenna of UE end.
Output control device in the embodiment of the invention as shown in Figure 9, comprising:
Receiver module 901 is used for the pilot frequency information that receiving end/sending end sends by a plurality of control channels, and transmitting terminal is by one or more data flow of Traffic Channel transmission.
Signal-to-noise ratio (SNR) estimation module 902 is used for obtaining a plurality of estimated snrs or a plurality of with reference to signal to noise ratio according to described pilot frequency information.
Wherein, the method for acquisition estimated snr can be referring to step 202 and associated description thereof.Acquisition can be referring to step 302 and associated description thereof with reference to the method for signal to noise ratio.
Target signal to noise ratio module 903, the Block Error Rate that is used for described data flow obtains one or more target signal to noise ratio.Wherein, the method for acquisition target signal to noise ratio can be referring to step 204 and associated description thereof.
Comparison process module 904 is used for described estimated snr that described signal-to-noise ratio (SNR) estimation module 902 is obtained or described target signal to noise ratio with reference to signal to noise ratio and 903 acquisitions of described target signal to noise ratio module compares processing.Wherein, comparing the method for processing can be referring to step 205,305,404 and associated description.
Indicating module 905, the result who is used for the comparison process that obtains according to described comparison process indicates described transmitting terminal that the transmitting power of described control channel is adjusted.When transmitting terminal is indicated, can utilize one or two TPC command words to indicate, specifically can be referring to the associated description to the TPC command word.
Above-mentioned comparison process module 904 can comprise:
Weighting merges module, be used for a plurality of estimated snrs that described signal-to-noise ratio (SNR) estimation module is obtained or to described be weighted to merge with reference to signal to noise ratio obtain one and merge estimated snr and output;
Comparison module is used for the described merging estimated snr of described weighting merging module acquisition and the target signal to noise ratio of described target signal to noise ratio module acquisition are compared processing.
Above-mentioned output control device can be physical location or the logic module of base station.
One of ordinary skill in the art will appreciate that and realize that all or part of step that above-described embodiment method is carried is to come the relevant hardware of instruction to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises step of embodiment of the method one or a combination set of when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics of unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
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 (14)

1. a Poewr control method is characterized in that, comprising:
The pilot frequency information that receiving end/sending end sends by a plurality of control channels, and described transmitting terminal is by one or more data flow of Traffic Channel transmission;
Obtain a plurality of estimated snrs or a plurality of with reference to signal to noise ratio according to described pilot frequency information, obtain one or more target signal to noise ratio according to described data flow;
To described estimated snr or describedly compare processing with reference to signal to noise ratio and described target signal to noise ratio, and indicate described transmitting terminal that the transmitting power of described control channel is adjusted according to the result of described comparison process.
2. method according to claim 1 is characterized in that, when sending a data flow by Traffic Channel, according to Block Error Rate or target signal to noise ratio of frame error rate acquisition of described data flow; And,
Described described estimated snr or the described step that compares processing with reference to signal to noise ratio and described target signal to noise ratio are comprised:
Described a plurality of estimated snrs are weighted to merge obtain one and merge estimated snr, perhaps to described a plurality of be weighted to merge with reference to signal to noise ratio obtain a merging with reference to signal to noise ratio;
Determine that described merging estimated snr or described merging are with reference to the magnitude relationship of signal to noise ratio and described target signal to noise ratio.
3. method according to claim 1 is characterized in that, when sending a plurality of data flow by Traffic Channel, according to Block Error Rate or target signal to noise ratio of frame error rate acquisition of described a plurality of data flow; And,
Described described estimated snr or the described method that compares processing with reference to signal to noise ratio and described target signal to noise ratio are comprised:
Described a plurality of estimated snrs are weighted to merge obtain one and merge estimated snr, perhaps to described a plurality of be weighted to merge with reference to signal to noise ratio obtain a merging with reference to signal to noise ratio;
Determine that described merging estimated snr or described merging are with reference to the magnitude relationship of signal to noise ratio and described target signal to noise ratio.
4. method according to claim 3 is characterized in that, the described step that obtains a target signal to noise ratio according to Block Error Rate or the frame error rate of a plurality of data flow comprises:
Add up respectively Block Error Rate or the frame error rate of described a plurality of data flow, average Block Error Rate or frame error rate according to described a plurality of upstreams are determined a target signal to noise ratio, perhaps determine a target signal to noise ratio according to the Block Error Rate of described a plurality of upstreams or the maximum in the frame error rate or minimum value.
5. method according to claim 3, it is characterized in that, the described step that obtains a target signal to noise ratio according to Block Error Rate or the frame error rate of a plurality of data flow comprises: obtain Block Error Rate or the frame error rate average statistical of described a plurality of data flow in set point number, and determine a target signal to noise ratio according to described average statistical.
6. the described method of arbitrary claim in 5 according to claim 1, it is characterized in that the step that the described transmitting terminal of described indication is adjusted the transmitting power of described control channel comprises: indicate described transmitting terminal that the transmitting power of described control channel is adjusted by a through-put power control word TPC.
7. method according to claim 1 is characterized in that, when adopting the multiple data stream pattern of multiple-input and multiple-output, the described step that described estimated snr and described target signal to noise ratio are compared processing comprises:
Determine respectively the reference signal to noise ratio of each pilot tone and the magnitude relationship of its respective objects signal to noise ratio;
The method that described result according to described comparison process indicates described transmitting terminal that the transmitting power of described control channel is adjusted is: indicate described transmitting terminal that the transmitting power of described control channel is adjusted according to the described magnitude relationship of determining respectively.
8. method according to claim 7, it is characterized in that, the step of determining the target signal to noise ratio of described control channel comprises: statistics obtains the Block Error Rate of a plurality of data flow of described Traffic Channel transmission respectively, determines the target signal to noise ratio of described control channel according to precoding weight.
9. method according to claim 7 is characterized in that, when adopting the dual data stream pattern of multiple-input and multiple-output, the step of the reference signal to noise ratio of described respectively definite each pilot tone and the magnitude relationship of its respective objects signal to noise ratio comprises:
Calculate respectively
ΔSIRest_ref1＝SIRest_ref1-SIRtarget1；
ΔSIRest_ref2＝SIRest_ref2-SIRtarget2；
And whether determine the estimated snr of each pilot tone greater than 0 or with reference to the magnitude relationship of signal to noise ratio and its respective objects signal to noise ratio according to Δ SIRest_ref1 and Δ SIRest_ref2, wherein, SIRest_ref1 is with reference to signal to noise ratio 1, SIRest_ref2 is with reference to signal to noise ratio 2, SIRtarget1 is target signal to noise ratio 1, and SIRtarget2 is target signal to noise ratio 2.
10. method according to claim 9 is characterized in that, also comprises:
Calculate sum Δ SIR_ref=Δ SIRest_ref1+ Δ SIRest_ref2; And indicate described transmitting terminal that the transmitting power of described control channel is adjusted by the first through-put power control TPC1 command word, wherein:
If Δ SIRest_ref1＞0, and Δ SIRest_ref2＞0; Perhaps Δ SIRest_ref1＞0, Δ SIRest_ref2＜0, sum Δ SIR_ref＞0; Perhaps Δ SIRest_ref1＜0, Δ SIRest_ref2＞0, sum Δ SIR_ref＞0, then the TPC1 sign reduces the transmitting power of described control channel;
If Δ SIRest_ref1＜0, and Δ SIRest_ref2＜0; Perhaps Δ SIRest_ref1＞0, Δ SIRest_ref2＜0, sum Δ SIR_ref＜0; Perhaps Δ SIRest_ref1＜0, Δ SIRest_ref2＞0, sum Δ SIR_ref＜0, then the TPC1 sign increases the transmitting power of described control channel.
11. method according to claim 10 is characterized in that, also comprises:
Calculate dif Δ SIR_ref=Δ SIRest_ref1-Δ SIRest_ref2; And indicate described transmitting terminal that the transmitting power of described Traffic Channel is adjusted by the second through-put power control TPC2 command word, wherein:
If dif Δ SIR_ref＞N, TPC2 sign boss flows the increased power set point, the described set point of auxiliary subflow power reduction;
If dif Δ SIR_ref＜N, TPC2 sign boss flows the power reduction set point, the described set point of auxiliary subflow increased power;
Described N is threshold value.
12. an output control device is characterized in that, comprising:
Receiver module is used for the pilot frequency information that receiving end/sending end sends by a plurality of control channels, and described transmitting terminal is by one or more data flow of Traffic Channel transmission;
The signal-to-noise ratio (SNR) estimation module is used for obtaining a plurality of estimated snrs or a plurality of with reference to signal to noise ratio according to described pilot frequency information;
The target signal to noise ratio module, the Block Error Rate that is used for described data flow obtains one or more target signal to noise ratio;
The comparison process module is used for described estimated snr that described signal-to-noise ratio (SNR) estimation module is obtained or described target signal to noise ratio with reference to signal to noise ratio and the acquisition of described target signal to noise ratio module compares processing;
Indicating module, the result who is used for the comparison process that obtains according to described comparison process indicates described transmitting terminal that the transmitting power of described control channel is adjusted.
13. device according to claim 12 is characterized in that, described comparison process module comprises:
Weighting merges module, be used for a plurality of estimated snrs that described signal-to-noise ratio (SNR) estimation module obtains are weighted to merge obtaining one and merging estimated snr, perhaps to described signal-to-noise ratio (SNR) estimation module obtain a plurality of be weighted to merge with reference to signal to noise ratio obtain a merging with reference to signal to noise ratio and output;
Comparison module is used for that described weighting is merged described merging estimated snr that module obtains or described merging and compares processing with reference to the target signal to noise ratio of signal to noise ratio and the acquisition of described target signal to noise ratio module.
14. a base station is characterized in that, comprising:
According to claim 12 or 13 described output control devices.
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