CN101589561A - Combined open loop/closed loop (CQI-based) uplink transmit power control with interference mitigation for E-UTRA - Google Patents

Combined open loop/closed loop (CQI-based) uplink transmit power control with interference mitigation for E-UTRA Download PDF

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CN101589561A
CN101589561A CNA2007800370736A CN200780037073A CN101589561A CN 101589561 A CN101589561 A CN 101589561A CN A2007800370736 A CNA2007800370736 A CN A2007800370736A CN 200780037073 A CN200780037073 A CN 200780037073A CN 101589561 A CN101589561 A CN 101589561A
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sinr
cqi
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CN101589561B (en
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辛颂尧
D·M·格列可
R·L·奥勒森
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InterDigital Technology Corp
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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
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control
    • 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
    • H04W52/06—TPC algorithms
    • H04W52/10—Open loop power control
    • 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
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • 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
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • 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
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • 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
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • 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
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/246—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter calculated in said terminal
    • 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]
    • H04W52/265—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
    • 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
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/286—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission during data packet transmission, e.g. high speed packet access [HSPA]

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  • Signal Processing (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

A combined open loop and closed loop (channel quality indicator (CQI)-based) transmit power control (TPC) scheme with interference mitigation for a long term evolution (LTE) wireless transmit/receive unit (WTRU) is disclosed. The transmit power of the WTRU is derived based on a target signal-to-interference noise ratio (SINR) and a pathloss value. The pathloss value pertains to the downlink signal from a serving evolved Node-B (eNodeB) and includes shadowing. An interference and noise value of the serving eNodeB is included in the transmit power derivation, along with an offset constant value to adjust for downlink (DL) reference signal power and actual transmit power. A weighting factor is also used based on the availability of CQI feedback.

Description

Be used for composite type open/close (based on CQI) the up-link transmission power control of the interference mitigation of E-UTRA
Technical field
The present invention relates to wireless communication system.
Background technology
With regard to evolved universal terrestrial radio inserts (E-UTRA) up link (UL), submitted to some transmitting power controls (TPC) to propose at present to 1 (WG1) of third generation partner program (3GPP) Long Term Evolution (LTE) working group.These propose generally can be divided into (slowly) open loop TPC and closed loop or based on the TPC of channel quality information (CQI) slowly.
Open loop TPC measures and system parameters based on path loss, and wherein the path loss measurement is gone up at wireless transmitter/receiver unit (WTRU) and carried out, and system parameters is provided by evolved Node B (e Node B).
Closed loop TPC is normally based on the TPC feedback information that periodically sends from the e Node B (for example TPC order), and wherein this feedback information typically uses the Signal Interference and Noise Ratio (SINR) that records at e Node B place and derives and obtain.
For instance, open loop TPC can compensate long-term channel variation (for example path loss and shadow fading (shadowing)) very effectively under the situation that does not have the transmitting power historical record.But open loop TPC can cause path loss measure error and transmitting power step-up error usually.On the other hand because slow closed loop or be with from the be fed back to basis of e Node B with the signal announcement based on the TPC of CQI, therefore, it to measure and the error of transmitting power in being provided with more insensitive.Yet, when not having available feedback because UL transmission suspends or feedback transmission is suspended, perhaps when channel variation is violent, closed loop or will reduce performance slowly based on the TPC of CQI.
Summary of the invention
Concerning E-UTRA UL, what considered is to come compensating for path loss and shade at least by TPC, and/or alleviates interference.A kind of enhancement mode UL TPC scheme that open loop TPC scheme and closed loop TPC and interference mitigation are combined togather is here disclosed.Closed loop TPC is based on CQI (for example UL License Info or modulation and encoding setting (MCS) information).This enhancement mode UL TPC scheme can be used for UL data and control channel.In addition, this enhancement mode UL TPC scheme that is proposed is also very flexible, and is adaptive to dynamical system/link parameter and channel status, so that reach the demand of E-UTRAUL.
In addition, estimate it is under the situation based on the UL reference signal at channel and CQI, estimate for fear of abominable UL channel and CQI, the UL TPC (that is to say that each or two mixed automatic repeat request (HARQ) cycle period are carried out a TPC and upgraded) that is used for data channel is carried out in proposal with the low rate such as 100Hz.Concerning control signaling associated with the data, suppose that maximum CQI report speed is that per 1 millisecond of Transmission Time Interval (TTI) carries out once, the TPC renewal rate can increase to 1000Hz so,
Description of drawings
By reading with reference to the accompanying drawings, can understand the general introduction of front and follow-up detailed description better, wherein:
What Fig. 1 showed is the wireless communication system that comprises WTRU and e Node B; And
Fig. 2 shows is flow chart by the TPC process of Fig. 1 system implementation.
Embodiment
The term of hereinafter quoting " wireless transmitter/receiver unit (WTRU) " is including, but not limited to subscriber equipment (UE), mobile radio station, fixing or moving user unit, beep-pager, cell phone, PDA(Personal Digital Assistant), computer or other any subscriber equipmenies that can work in wireless environment.The term of hereinafter quoting " evolved Node B (e Node B) " including, but not limited to the base station, Node B, sub-district, site controller, access point (AP) or other any interface equipments that can in wireless environment, work.
What Fig. 1 showed is the wireless communication system 100 that comprises at least one WTRU 105 and at least one service e Node B 110.This WTRU 105 comprises receiver 115, transmitter 120, processor 125 and at least one antenna 130.This service e Node B 110 comprises transmitter 135, receiver 140, processor 145, mapping table 150 and at least one antenna 155.WTRU 105 communicates by letter via down link (DL) control channel 160, UL shared data channel 165 and UL control channel 170 with e Node B 110.
Processor 145 in the e Node B 110 is carried out UL according to the signal that is received by receiver 140 and is disturbed thermal noise (IoT) to measure, and the IoT measurement result that records is compared with predetermined threshold.Processor 145 also can generate the interference load designator, and this designator then can be broadcasted by transmitter 135 modes rule-based or that trigger of e Node B 110.What this interference load designator was indicated is that the IoT that carries out on e Node B 110 measures whether exceed predetermined threshold.When the receiver among the WTRU 105 115 received and decoded this interference load designator, the processor 125 among the WTRU 105 can be determined the state of the IoT at e Node B 110 places, and this state can be used for alleviating the presence of intercell interference of e Node B 110.
When WTRU 105 was positioned at specific cell, it can carry out open loop TPC according to system parameters and path loss measurement result.WTRU 105 alleviates presence of intercell interference in the e Node B 110 according to the interference load designator, and wherein said e Node B 110 is in adjacent with described specific cell and with among other neighbor cells are compared the strongest sub-district.The strongest described sub-district is meant that WTRU 105 has the sub-district of the highest path gain (lowest path loss just) to it.Then, concerning the transmitting power that might be biased because of open loop error, WTRU 105 proofreaies and correct the transmitting power that it calculates based on open loop according to CQI that receives via DL control channel 160 and target SINR, thus the compensation open loop error.
Should be noted that CQI refers to the UL License Info (or MCS) that e Node B 110 usefulness signals are announced to WTRU 105 via the DL control channel 160 that is used for the UL link circuit self-adapting.What CQI represented is service e Node B 110 UL channel quality specific to WTRU to WTRU 105 feedbacks in DL control channel 160.In E-UTRA, CQI is that the form with the UL License Info provides.Target SINR is the parameter specific to WTRU, and this parameter determined by e Node B 110, and is given WTRU 105 by high-level signaling more by announcement.
The WTRU 105 transmitting power P that are used for UL shared data channel 165 TxIt is the DL reference signal 175 of launching according to the transmitter 135 of e Node B 110 and in initial transmission phase, determining.DL reference signal 175 has known transmitting power, and WTRU 105 is to use this transmitting power to come the execution route loss measurement.Concerning the TPC of inside, sub-district, the Initial Trans P of WTRU 105 TxAlso define as follows according to open loop TPC:
P Tx=max (min (SINR T+ PL+IN 0+ K, P Max), P Min) equation (1A)
SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B 110, and PL is to be the path loss (set point parameter just) of unit from service e Node B 110 to WTRU 105 and with dB, this is comprising shadow fading.105 of WTRU come the measuring route loss according to DL reference signal 175, and wherein the transmitting power of this signal is known via the DL signaling on WTRU 105.Value IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B 110.K is the power control tolerance limit that is used to serve e Node B 110 under the situation that DL reference signal 175 might depart from actual emission power in practice having taken into account.P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of on UL shared data channel 165, carrying out for WTRU 105 of unit with dBm.
The target SINR that supposes to be used for WTRU 105 (or subgroup of WTRU) can measure according on the service e Node B 110 certain to regulate.Outer shroud TPC scheme then can be used for target SINR and regulate.Usually, target SINR is based on that the target link-quality (for example BLER (block error rate) (BLER)) of UL shared data channel 165 determines.In addition, different multidiameter fading channel state need be used to specify the different target SINR (for example BLER) of target link-quality usually.Correspondingly, this measures the target link-quality (and might be the fading channel quality) that comprises at WTRU 105.
Concerning UL multiple-input and multiple-output (MIMO), under considering that different MIMO patterns need the situation for the different capacity of given link quality (for example BLER) or SINR, target SINR also depends on selected MIMO pattern.In this case, WTRU 105 can comprise a plurality of antennas 130.
As an alternative, the transmitting power of WTRU 105 can be defined as having comprised minizone TPC, and is as follows:
P Tx=max (min (SINR T+ PL+IN 0+ K+ Δ (IoT S), P Max), P Min) equation (1B)
Its intermediate value Δ (IoT S) represent UL load control step-length, this step-length is the UL interference load designator (IoT of the strongest (S) neighbor cell S) IoT SFunction.
Δ (IoT S) choose integer value, as follows:
Figure A20078003707300181
Equation (2)
Wherein δ is the reservation system parameter, for example δ=-1 or-2dB.By using Δ (IoT S), can alleviate the presence of intercell interference in the neighbor cell.The interference that brings other sub-districts owing to the WTRU that is positioned at center of housing estate is less than the WTRU that those are in cell edge, so the segmentation in the load control step-length is considered as follows:
Figure A20078003707300182
Equation (3)
Wherein x is the minizone load control factor of segmentation.
The strongest neighbor cell is based on from single neighbor cell to WTRU that 105 path loss is measured and determines at WTRU 105, and wherein this strongest neighbor cell is the neighbor cell that has lowest path loss with WTRU 105 in the sub-district adjacent with the current sub-district that service is provided for WTRU 105.
By introducing Δ (IoT S), can alleviate presence of intercell interference (for example minizone TPC), then especially true concerning the strongest neighbor cell.Concerning the TPC of minizone, the e Node B will be measured UL and disturb (with rule or periodic form), can determine then then whether the interference level that records exceeds predetermined threshold.The state that the UL that finally obtains disturbs is to use IoT S(load designator just) and from (with the rule or the periodic form) of e Node B 110 broadcasting.For instance, exceed this threshold value, IoT so if disturb SBe set to 1, so, because e Node B 110 can suffer from too much presence of intercell interference in UL, therefore, e Node B 110 will order the WTRU in the neighbor cell to reduce its transmitting power a certain amount of.Otherwise, IoT STo be configured to 0, e Node B 110 will receive current UL interference level thus, and so, the WTRU in the neighbor cell does not need to reduce its transmitting power.105 of WTRU decode to being received from the load designator of strong neighbor cell, then can follow this order (IoT then S).If with IoT SBe decoded as 1, the transmitting power of WTRU 105 reduces Δ (IoT so S), that is to say Δ (IoT S)＜0dB.If with IoT SBe decoded as 0, so Δ (IoT S)=0dB.
Suppose all periodic broadcast UL interference load bits (similar with the relative grant that High Speed Uplink Packet inserts in (HSUPA)) of each sub-district, WTRU 105 can decode from the indicator bit of selected the strongest neighbor cell thus.This WTRU 105 can judge that it is in cell edge still is inside, sub-district according to the path loss ratio between Serving cell and the strongest neighbor cell.As an alternative, the minizone load of segmentation control factor x can be as giving a definition:
Figure A20078003707300191
Equation (4)
After initial transmission phase, WTRU 105 comes into effect its TPC immediately in energising (handling similar with Random Access Channel (RACH)) or after setting up session connection therebetween, and the transmitting power of WTRU is following calculating:
P Tx=max (min (SINR T+ PL+IN 0+ K+ α f (CQI, SINR T), P Max), P Min) equation (5)
F (CQI, SINR wherein T) be based on the closed-loop corrected factor (for example UL License Info or MCS information) of UL CQI and corresponding target SINR.Weighting factor α can come definite according to channel status and CQI availability (or the UL transmission suspends), wherein 0≤α≤1.Give an example, if there is not the UL CQI (UL permission or MCS information) that can obtain from e Node B 110 because lacking the UL transfer of data of scheduling, weighting factor α will be set to 0 so.Otherwise weighting factor α will be set to 1.Though for simplicity, weighting factor α has been arranged to 0 or 1 here, has replaced execution mode and also comprised the self adaptation α value that adapts with channel status and UL/DL channel configuration.
Correction factor f (CQI, SINR T) be used to compensate open loop TPC correlated error, this is comprising the main path loss measure error of the imperfect reciprocity in Frequency Division Duplexing (FDD) (FDD) owing to UL and DL, and in the transmitter 120 of WTRU 105 owing to non-linear power is amplified the infringement that causes.Except the path loss as set point parameter, e Node B 110 can also impel correction factor to regulate TPC relevant system parameters, for example SINR, IN 0And K, these parameters equally also are set point parameter.For example, must regulate target SINR for specifying WTRU 105 in e Node B 110, and when allowing WTRU 105 understand described adjusting then, e Node B 110 can be WTRU 105 corresponding adjusting CQI (UL permission), rather than directly with signal target SINR is announced to WTRU 105.Consider that UL CQI has represented the SINR that receives at e Node B 110 places, this correction factor is according to from UL CQI (UL permission or the MCS information) feedback calculation of service e Node B 110 by WTRU 105.For example,
F (CQI, SINT T)=SINR T-E{SINR Est(CQI) } (dB) equation (6)
SINR wherein Est(CQI) representative is that the SINR that receives of e Node B estimates, this estimations then is that WTRU105 derives from UL CQI feeds back and obtains.E{SINR Est(CQI) } expression is estimation SINR mean value with respect to the time, thus:
E{SINR Est(CQI k)=ρ E{SINR Est(CQI K-1)+(1-ρ) E{SINR Est(CQI k) equation (7)
CQI wherein kThe k that is of representative CQI that receives, ρ then is the average filter coefficient, and 0≤ρ≤1.
Concerning as mentioned above by target SINR and estimate the correction factor that the difference between the SINR (derives from the CQI that is reported and obtain) provides, this correction factor usually representative be to need the open loop TPC correlated error that compensate.
The e Node B signaling that is used for the TPC scheme that proposed
Target SINR level SINR TIt is a parameter specific to WTRU (or WTRU subgroup), as function (for example path loss) and/or the given mass demand such as BLER from the distance of e Node B 110 to WTRU 105, this parameter can be announced to WTRU 105 by e Node B 110 usefulness signals.Usually, e Node B 110 is to use mapping table 150 that aimed quality (for example BLER) is mapped to target SINR value.How generating this mapping table then is the proprietary scheme of e Node B (or carrier operator).Target SINR can be conditioned by outer loop mechanism.The signaling of target SINR is to finish by the control of the L1/2 in band signaling when it is regulated.
Power control tolerance limit K is mainly used in the DL reference signal and specific to the parameter of e Node B, this parameter can be announced to WTRU 105 by e Node B 110 usefulness signals.For example, because DL reference signal 175 transmits with the constant transmit power level, and can understand this level by high-level signaling more on WTRU, therefore, DL reference signal 175 can be used for the path loss of WTRU 105 and measures.But the actual emission power of DL reference signal 175 might be different from the performance number with the signal announcement because of the proprietary scheme of e Node B.In this case, power excursion will be between transmitting power that reality is used and the transmitting power of announcing in semi-static mode by broadcast channel (BCH).For K, it probably is semi-static, and is announced by broadcast channel (BCH).105 of WTRU are used for its UL/DL path loss calculation with this information.Should be noted that though hypothesis power control tolerance limit K announces with signal separately with other parameters, it also can be embedded in target SINR is SINR TIn, thus:
SINR T(embedding the back)=SINR T+ K (dB) equation (8)
In this case, K there is no need to announce to WTRU 105 with dominant signal.
Total UL is disturbed and noise level IN 0, it is averaged in on all subcarriers that are in use (or radio bearer (RB)) or the subclass of subcarrier, and this level can be announced to WTRU 105 by e Node B 110 usefulness signals.This level obtains (and can announce by BCH) by the 110 measurement/derivations of e Node B.The renewal rate of this signaling is relatively low usually.E Node B 110 then be to use such as the Noise Estimation technology the proprietary scheme of e Node B and with regular fashion measurement/estimation IN 0.
To minimum and maximum UL transmitted power level P MaxAnd P Min, these level can be announced to WTRU 105 by e Node B 110 usefulness signals.In addition, these level both can be the parameters according to the WTRU ability, also can clearly be announced by e Node B 110 usefulness signals.
UL CQI (for example UL License Info or MCS information) for UL link circuit self-adapting (for example Adaptive Modulation and Coding (MCS)) at first with the signal announcement (its maximum signaling rate be each TTI once, and this UL CQI can be announced to WTRU 105 by e Node B 110 usefulness signals 1000Hz for example).
UL CQI (for example UL License Info) announces the feedback information specific to WTRU to WTRU 105 by e Node B 110 usefulness signals.Though UL CQI is used to the UL link circuit self-adapting at first, it also is used to the composite type open loop that proposed and the closed loop part of closed loop TPC.Usually, CQI (UL permission) is based on UL channel status (for example SINR measurement result at e Node B 110 places) and SINR-CQI mapping ruler and is derived and to obtain, and this means that UL CQI has represented the SINR that records at e Node B 110 places.Correspondingly, in case WTRU 105 receives CQI and has been presented the mapping ruler of the SINR-CQI mapping that is used for e Node B 110 places, WTRU 105 can be interpreted as the CQI that receives SINR and estimates so.Estimated SINR then is used to come the calculation correction item according to equation (6).
E Node B 110 uses CQI mapping rulers (or the deviation between CQI and the measured SINR) to implement the generation of CQI feedback, and this rule can be announced to WTRU105 by e Node B 110 usefulness signals.In addition, this rule or parameter also can be combined among the target SINR.In this case, the dominance signaling of rule (or parameter) is unwanted.
Since above-mentioned TPC scheme not need divided by on additional feedback TPC order outside the system parameters enumerated, this is comprising target SINR, area interference/noise level, reference signaling transmitting power and the steady state value that can give WTRU with very slow speed broadcasting (perhaps directly announcing with signal), therefore, this scheme is very favorable.In addition, it is very flexible that above-mentioned TPC scheme is designed, and adapt with dynamical system/link parameter (target SINR and presence of intercell interference load condition) and channel status (path loss and shadow fading), can reach the demand of E-UTRA thus.In addition, above-mentioned TPC scheme is also compatible mutually with other link adaptation schemes, for example AMC, HARQ and adaptive MIMO.
Though here the scheme of Ti Chuing be with UL CQI (for example UL License Info) be used for being proposed about the composite type open loop of E-UTRA UL and the closed loop composition of closed loop TPC (for example correction factor), but as an alternative, e Node B 110 also can be with signal dominance ground to corrective command that is embedded in the UL License Info of WTRU 105 announcements.In this case, WTRU 105 can be used for closed-loop corrected factor (may combine with UL CQI) with this corrective command with the announcement of signal dominance.In addition, if the presence of intercell interference between 110 coordinations of service e Node B and other sub-districts, and by correspondingly regulating target SIR or possible P MaxCome it is merged, the TPC that is proposed can also be used for the interference mitigation of minizone so.
In order to realize that accurate UL channel estimating (being used for UL data/control signal demodulation) and CQI estimate (being used for UL scheduling and link circuit self-adapting), comparatively it is desirable to regulate UL reference signal transmitting power, so that the channel of cope with bad and/or system mode as quickly as possible with comparatively faster speed.Even the UL TPC of data channel that is used for proposed above is to upgrade WTRU transmitting power (under the situation of the ULAMC that considers per 1 millisecond of TTI) than slow rate, up to the renewal rate of 100Hz also is (for example each or two HARQ cycle periods just upgrade once) that can realize, thereby has avoided abominable UL channel and CQI to estimate.This renewal rate is controlled by WTRU 105, and comparatively preferably WTRU 105 can upgrade when receiving CQI at every turn thus.
Concerning UL control signaling, WTRU 105 will use the combinations thereof formula TPC scheme with following deviation.When UL CQI can use, and at this moment maximum CQI report speed will use quick TPC renewal rate (for example 1000Hz) when being per 1 millisecond of TTI one time.In this case, correction factor f (CQI, the SINR in the equation (5) T) can be expressed as follows:
F (CQI, SINR T)=SINR T-SINR Est(CQI) (dB) equation (9)
Wherein CQI is up-to-date UL CQI.In addition, weighting factor is configured to equal 1 (α=1).This will cause knockdown open loop and based on the TPC of CQI.But do not having the UL CQI time spent, based on the TPC of CQI part with disabled (that is to say α=0).And this only can produce open loop TPC.
Concerning UL shared data channel 165, WTRU 105 will determine its transmitting power with the slow renewal rate such as 100Hz according to the open loop of combination with based on the TPC of CQI.In initial transmission and/or can't be when e Node B 110 obtains available UL CQI, for example in transmission time-out process, based on the transmitting power control section of CQI with disabled, and employed only be open loop TPC.
Concerning UL shared data channel 165, WTRU 105 will determine its transmitting power with the very fast renewal rate such as 1000Hz according to the open loop of combination with based on the TPC of CQI.Can't be when e Node B 110 obtains available UL CQI, for example in transmission time-out process, based on the transmitting power control section of CQI with disabled, and employed only be open loop TPC.
110 broadcasting and TPC system associated parameter of e Node B, this is comprising its reference signal transmitted power level, interference level and power margin.In addition, e Node B 110 also is associated with TPC and specific to the parameter of WTRU to WTRU105 announcement with signal, this is comprising target SINR, WTRU maximal power level and Minimum Power Level, and wherein signaling is to finish by the control of the L1/2 layer in band signaling.Outer shroud then can be used to regulate target SINR.
Fig. 2 shows is the flow chart of the TPC process 200 that can be implemented by Fig. 1 system 100.In step 205, implement initial UL transmit stage.WTRU 105 carries out based on TPC process in the open loop sub-district of path loss according to the system parameters that service e Node B 110 provides, so that for initial UL transmit stage transmitting power (for example similar with the RACH process) is set, wherein said system parameters can be SINR, IN 0, K and DL reference signal 175 transmitting power (step 210).In step 215, implement normal UL transmit stage.105 of WTRU can carry out based on TPC process in the open loop sub-district of path loss based on the system parameters that service e Node B 110 provides, and will carry out TPC process (step 220) in closed loop (based on the CQI) sub-district based on the UL CQI (UL License Info) that service e Node B 110 provides.As selection, WTRU will carry out based on TPC process (step 225) in the sub-district of IoT based on the load designator (IoT) that receives from all neighbor cells (e Node B).In step 230, WTRU 105 will be provided with the transmitting power of at least one UL channel (for example UL shared data channel 165, UL control channel 170) according to execution in step 220 (and the optional step 225) value that is produced.
Embodiment
1. method that is used to carry out the transmitting power control (TPC) of wireless transmitter/receiver unit (WTRU), this method comprises:
(a) described WTRU carries out TPC process in the open loop sub-district by determining set point parameter; And
(b) described WTRU carries out TPC process in the closed loop sub-district by using closed-loop corrected factor, to regulate the set point parameter of being determined by TPC process in the open loop sub-district.
2. according to embodiment 1 described method, wherein said set point parameter is up link (UL) path loss from described WTRU to the evolved Node B of the service that is arranged in Serving cell (e Node B), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with set point parameter.
3. according to the described method of arbitrary embodiment in embodiment 1 and 2, wherein said closed-loop corrected factor is the function of up link (UL) channel quality information (CQI) and echo signal interference-to-noise ratio (SINR).
4. according to the described method of arbitrary embodiment in embodiment 1 and 3, the echo signal interference-to-noise ratio (SINR) of wherein said set point parameter for locating in the evolved Node B of the service that is arranged in Serving cell (e Node B), described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with set point parameter.
5. according to the described method of arbitrary embodiment in embodiment 1 and 3, wherein said set point parameter is disturbed and noise power (IN for the UL that locates in the evolved Node B of the service that is arranged in Serving cell (e Node B) 0), described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with set point parameter.
6. according to the described method of arbitrary embodiment in embodiment 1 and 3, the power control tolerance limit (K) of wherein said set point parameter for locating in the evolved Node B of the service that is arranged in Serving cell (e Node B), described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with set point parameter.
7. one kind is used to carry out the wireless transmitter/receiver unit (WTRU) that transmitting power is controlled (TPC), and this WTRU comprises:
(a) receiver;
(b) transmitter; With
(c) with the processor of Receiver And Transmitter electric coupling, this processor is configured to carry out TPC process in the open loop sub-district by definite set point parameter, and by using closed-loop corrected factor to carry out TPC process in the closed loop sub-district, to regulate the set point parameter of determining by TPC process in the open loop sub-district.
8. according to embodiment 7 described WTRU, wherein said set point parameter is up link (UL) path loss from described WTRU to the evolved Node B of the service that is arranged in Serving cell (e Node B), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with set point parameter.
9. according to the described WTRU of arbitrary embodiment in embodiment 7 and 8, wherein said closed-loop corrected factor is the function of UL channel quality information (CQI) and echo signal interference-to-noise ratio (SINR).
10. according to the described WTRU of arbitrary embodiment in embodiment 7 and 9, the echo signal interference-to-noise ratio (SINR) of wherein said set point parameter for locating in the evolved Node B of the service that is arranged in Serving cell (e Node B), described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with set point parameter.
11. according to the described WTRU of arbitrary embodiment in embodiment 7 and 9, wherein said set point parameter is disturbed and noise power (IN for the UL that locates in the evolved Node B of the service that is arranged in Serving cell (e Node B) 0), described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with set point parameter.
12. according to the described WTRU of arbitrary embodiment in embodiment 7 and 9, the power control tolerance limit (K) of wherein said set point parameter for locating in the evolved Node B of the service that is arranged in Serving cell (e Node B), described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with set point parameter.
13. a method that is used to carry out the transmitting power control (TPC) of wireless transmitter/receiver unit (WTRU), this method comprises:
(a) described WTRU carries out open loop sub-district TPC process based on periodicity up link (UL) the path loss measurement from this WTRU to the evolved Node B of the service that is arranged in Serving cell (e Node B);
(b) described WTRU carries out TPC process in the closed loop sub-district based on the UL channel quality information (CQI) that offers this WTRU by described service e Node B; And
(c) described WTRU is based on by the combination of carrying out the parameter value that the TPC process is produced in the TPC process and closed loop sub-district in the described open loop sub-district at least one UL channel transmitting power level being set.
14., also comprise according to embodiment 13 described methods:
(d) described WTRU carries out UL based on the minizone TPC process of disturbing thermal noise (IoT), and wherein step (c) comprises that also this WTRU is provided with at least one UL channel transmitting power based on the combination by the parameter value carrying out in the described open loop sub-district TPC process in TPC process, the closed loop sub-district and produced based on the minizone TPC process of IoT.
15. according to the described method of arbitrary embodiment in embodiment 13 and 14, wherein said at least one UL channel comprises UL shared data channel.
16. according to the described method of arbitrary embodiment in embodiment 13 and 14, wherein said at least one UL channel comprises the UL control channel.
17., also comprise according to embodiment 14 described methods:
(e) described WTRU is implemented initial UL transmit stage.
18. according to embodiment 17 described methods, wherein step (a) also comprises:
(a1) described service e Node B sends a plurality of open loop parameters to described WTRU with signal, and wherein open loop parameter is sent respectively or sends as single synthetic parameters; And
(a2) based on down link (DL) reference signal that transmits by service e Node B and the transmitting power P of the following definite WTRU of open loop parameter Tx:
P Tx=max (min (SINR T+ PL+IN 0+ K, P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, and P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm.
19. according to embodiment 17 described methods, wherein step (d) also comprises:
(d1) based on transmitting power P by the following definite WTRU of down link (DL) reference signal that serves the transmission of e Node B Tx:
P Tx=max (min (SINR T+ PL+IN 0+ K+ Δ (IoT S), P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm, and Δ (IoT S) to represent UL load control step-length, this step-length be the UL interference load designator IoT of strong neighbor cell SFunction.
20. according to embodiment 17 described methods, wherein step (a) also comprises:
(a1) described WTRU carries out based on TPC process in the open loop sub-district of path loss so that the transmitting power for initial UL transmit stage to be set.
21. according to the described method of arbitrary embodiment among the embodiment 13-20, wherein said UL CQI is the UL License Info.
22. according to embodiment 14 described methods, wherein step (d) also comprises:
(d1) described e Node B is measured the UL interference level;
(d2) described e Node B determines whether measured UL interference level surpasses predetermined threshold; And
(d3) the rule-based or triggering broadcasting interference load designator of described e Node B, whether the measured UL interference level of wherein said interference load designator indication surpasses predetermined threshold.
23. according to embodiment 22 described methods, wherein measured UL interference level is that UL disturbs thermal noise (IoT) to measure.
24. according to embodiment 17 described methods, step (a) and (b) carry out afterwards wherein in step (e), and step (b) also comprises:
(b1) following calculating WTRU transmitting power:
P Tx=max (min (SINR T+ PL+IN 0+ K+ α f (CQI, SINR T), P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, f (CQI, SINR T) being based on the closed-loop corrected factor of UL CQI and corresponding target SINR, α is a weighting factor, and P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm.
25. according to embodiment 24 described methods, wherein 0≤α≤1.
26. according to the described method of arbitrary embodiment in embodiment 24 and 25, wherein said closed-loop corrected factor f (CQI, SINR T) be used to compensate open loop TPC correlated error.
27., wherein consider the SINR that UL CQI representative receives at e Node B place, described closed-loop corrected factor f (CQI, SINR according to the described method of arbitrary embodiment among the embodiment 24-26 T) be by WTRU according to from the UL CQI feedback calculation of service e Node B, f (CQI, SINT thus T)=SINR T-E{SINR Est(CQI) } (dB), SINR wherein Est(CQI) representative is that the SINR that receives of e Node B estimates, this estimations then is that WTRU derives from UL CQI feeds back and obtains.
28. according to embodiment 27 described method, wherein E{SINR Est(CQI) } expression is estimation SINR mean value with respect to the time, thus:
E{SINR Est(CQI k)=ρ E{SINR Est(CQI K-1)+(1-ρ) E{SINR Est(CQI k), CQI wherein kRepresent k CQI that receives, ρ then is the average filter coefficient, 0≤ρ≤1.
29. a wireless transmitter/receiver unit (WTRU) that is used to carry out transmitting power control (TPC), this WTRU comprises:
(a) receiver;
(b) with the processor of receiver electric coupling, this processor is configured to carry out open loop sub-district TPC process based on periodicity up link (UL) the path loss measurement from this WTRU to the evolved Node B of the service that is arranged in Serving cell (e Node B), and based on carrying out TPC process in the closed loop sub-district by described receiver from the UL channel quality information (CQI) that described service e Node B receives; And
(c) with the transmitter of processor electric coupling, this transmitter is configured to based on producing at least one the UL channel with transmitted power level by the combination of carrying out the parameter value that the TPC process is produced in the TPC process and closed loop sub-district in the described open loop sub-district.
30. according to embodiment 29 described WTRU, wherein said processor is configured to carry out UL based on the minizone TPC process of disturbing thermal noise (IoT), and described transmitter is configured to produce at least one the UL channel with transmitted power level based on the combination by the parameter value carrying out in the described open loop sub-district TPC process in TPC process, the closed loop sub-district and produced based on the minizone TPC process of IoT.
31. according to the described WTRU of arbitrary embodiment in embodiment 29 and 30, wherein said at least one UL channel comprises UL shared data channel.
32. according to the described WTRU of arbitrary embodiment in embodiment 29 and 30, wherein said at least one UL channel comprises the UL control channel.
33. according to the described WTRU of arbitrary embodiment among the embodiment 29-32, wherein said receiver is configured to receive a plurality of open loop parameters that sent to WTRU by service e Node B with signal, wherein open loop parameter is sent respectively or is sent as single synthetic parameters, and described processor is configured to based on down link (DL) reference signal that is transmitted by service e Node B and the transmitting power P of the following definite WTRU of open loop parameter Tx:
P Tx=max (min (SINR T+ PL+IN 0+ K, P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, and P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm.
34. according to embodiment 30 described WTRU, wherein said processor is configured to the transmitting power P based on the following definite WTRU of down link (DL) reference signal that is transmitted by service e Node B Tx:
P Tx=max (min (SINR T+ PL+IN 0+ K+ Δ (IoT S), P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm, and Δ (IoT S) to represent UL load control step-length, this step-length be the UL interference load designator IoT of strong neighbor cell SFunction.
35. according to the described WTRU of arbitrary embodiment among the embodiment 29-34, wherein said processor is configured to carry out based on TPC process in the open loop sub-district of path loss so that the transmitting power for initial UL transmit stage to be set.
36. according to the described WTRU of arbitrary embodiment among the embodiment 29-35, wherein said UL CQI is the UL License Info.
37. according to the described WTRU of arbitrary embodiment among the embodiment 29-36, wherein said processor is configured to following calculating WTRU transmitting power:
P Tx=max (min (SINR T,+PL+IN 0+ K+ α f (CQI, SINR T), P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, f (CQI, SINR T) being based on the closed-loop corrected factor of UL CQI and corresponding target SINR, α is a weighting factor, and P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm.
38. according to embodiment 37 described WTRU, wherein 0≤α≤1.
39. according to the described WTRU of arbitrary embodiment in embodiment 37 and 38, wherein said closed-loop corrected factor f (CQI, SINR T) be used to compensate open loop TPC correlated error.
40., wherein consider the SINR that UL CQI representative receives at e Node B place, described closed-loop corrected factor f (CQI, SINR according to the described WTRU of arbitrary embodiment among the embodiment 37-39 T) be by WTRU according to from the UL CQI feedback calculation of service e Node B, f (CQI, SINT thus T)=SINR T-E{SINR Est(CQI) } (dB), SINR wherein Est(CQI) representative is that the SINR that receives of e Node B estimates, this estimations then is that WTRU derives from UL CQI feeds back and obtains.
41. according to embodiment 40 described WTRU, wherein E{SINR Est(CQI) } expression is estimation SINR mean value with respect to the time, thus:
E{SINR Est(CQI k)=ρ E{SINR Est(CQI K-1)+(1-ρ) E{SINR Est(CQI k), CQI wherein kRepresent k CQI that receives, ρ then is the average filter coefficient, 0≤ρ≤1.
42. an evolved Node B (e Node B) that is used to carry out transmitting power control (TPC), this e Node B comprises:
(a) processor is configured to measure the UL interference level, and determines whether measured UL interference level surpasses predetermined threshold; With
(b) with the transmitter of processor electric coupling, this transmitter is configured to rule-based or triggers broadcasting interference load designator, and whether the measured UL interference level of wherein said interference load designator indication surpasses predetermined threshold.
43. according to embodiment 42 described e Node B, wherein measured UL interference level is that UL disturbs thermal noise (IoT) to measure.
44. according to embodiment 42 described e Node B, wherein said transmitter is configured to send echo signal interference-to-noise ratio (SINR) level SINR with signal TTo wireless transmitter/receiver unit (WTRU), as at least one function the distance from this e Node B to this WTRU and the given quality requirement.
45. according to embodiment 44 described e Node B, wherein given quality requirement is BLER (block error rate) (BLER).
46., also comprise according to the described e Node B of arbitrary embodiment among the embodiment 42-45:
(c) mapping table that is electrically connected with described processor, wherein said processor are configured to use this mapping table that the aimed quality value is mapped to target SINR value.
47. according to embodiment 46 described e Node B, wherein said aimed quality value is BLER (block error rate) (BLER).
48. according to the described e Node B of arbitrary embodiment among the embodiment 42-47, wherein said transmitter is configured to generate down link (DL) reference signal.
49. according to the described e Node B of arbitrary embodiment among the embodiment 42-48, wherein said transmitter is configured to signal transmitting power control tolerance limit K.
50. according to embodiment 49 described e Node B, wherein said power control tolerance limit K is embedded in target SINR SINR TIn, SINR thus T(embedding the back)=SINR T+ K (dB).
51. according to the described e Node B of arbitrary embodiment among the embodiment 42-50, wherein said processor is configured to measure or assesses total UL and disturb and noise level IN 0, this IN 0On average be in by processor on the subclass of the subcarrier of use or subcarrier, and described transmitter is configured to send this IN with signal to all 0
52. according to the described e Node B of arbitrary embodiment among the embodiment 42-51, wherein said transmitter is configured to send maximum UL transmitted power level P with signal MaxWith minimum UL transmitted power level P Min
53. according to the described e Node B of arbitrary embodiment among the embodiment 42-52, wherein said transmitter is configured to send UL channel quality information (CQI) with signal.
54. according to embodiment 53 described e Node B, wherein said UL CQI comprises UL License Info or modulation and coded set (MCS) information, UL CQI is sent out for the purpose of UL link adaptation at first.
55. according to the described e Node B of arbitrary embodiment among the embodiment 42-54, wherein said transmitter is configured to signal transmitting channel quality information (CQI) mapping ruler, generates to be used for the CQI feedback.
Though feature of the present invention and element are described with specific combination in preferred embodiment, but each feature or element can be under the situation of other features that do not have described preferred implementation and element use separately, or with or with under the various situations that other features of the present invention and element combine do not use.Method provided by the invention or flow chart can be at the computer programs of being carried out by all-purpose computer or processor, implement in software or the firmware, wherein said computer program, software or firmware are to be included in the computer-readable recording medium in tangible mode, comprise read-only memory (ROM) about the example of computer-readable recording medium, random-access memory (ram), register, buffer storage, semiconductor memory apparatus, the magnetizing mediums of internal hard drive and moveable magnetic disc and so on, the light medium of magnet-optical medium and CD-ROM video disc and digital versatile disc (DVD) and so on.
For instance, appropriate processor comprises: general processor, application specific processor, conventional processors, digital signal processor (DSP), a plurality of microprocessor, the one or more microprocessors that are associated with the DSP core, controller, microcontroller, application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) circuit, any integrated circuit (IC) and/or state machine.
The processor that is associated with software can be used to realize radio-frequency (RF) transceiver, to be used in wireless transmission receiving element (WTRU), subscriber equipment, terminal, base station, radio network controller or any host computer.WTRU can be used in combination with the module that adopts hardware and/or form of software to implement, for example camera, camara module, video circuit, speaker-phone, vibratory equipment, loud speaker, microphone, TV transceiver, Earphone with microphone, keyboard, indigo plant
Figure A20078003707300351
Module, frequency modulation (FM) radio unit, LCD (LCD) display unit, Organic Light Emitting Diode (OLED) display unit, digital music player, media player, video game machine module, explorer and/or any wireless lan (wlan) module.

Claims (55)

1. method that is used to carry out the transmitting power control (TPC) of wireless transmitter/receiver unit (WTRU), this method comprises:
(a) described WTRU carries out open loop sub-district TPC process based on periodicity up link (UL) the path loss measurement from this WTRU to the evolved Node B of the service that is arranged in Serving cell (e Node B);
(b) described WTRU carries out TPC process in the closed loop sub-district based on the UL channel quality information (CQI) that offers this WTRU by described service e Node B; And
(c) described WTRU is based on by the combination of carrying out the parameter value that the TPC process is produced in the TPC process and closed loop sub-district in the described open loop sub-district at least one UL channel transmitting power level being set.
2. method according to claim 1 also comprises:
(d) described WTRU carries out UL based on the minizone TPC process of disturbing thermal noise (IoT), and wherein step (c) comprises that also this WTRU is provided with at least one UL channel transmitting power based on the combination by the parameter value carrying out in the described open loop sub-district TPC process in TPC process, the closed loop sub-district and produced based on the minizone TPC process of IoT.
3. method according to claim 1, wherein said at least one UL channel comprises UL shared data channel.
4. method according to claim 1, wherein said at least one UL channel comprises the UL control channel.
5. method according to claim 2 also comprises:
(e) described WTRU is implemented initial UL transmit stage.
6. method according to claim 5, wherein step (a) also comprises:
(a1) described service e Node B sends a plurality of open loop parameters to described WTRU with signal, and wherein open loop parameter is sent respectively or sends as single synthetic parameters; And
(a2) based on down link (DL) reference signal that transmits by service e Node B and the transmitting power P of the following definite WTRU of open loop parameter Tx:
P Tx=max (min (SINR T+ PL+IN 0+ K, P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, and P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm.
7. method according to claim 5, wherein step (d) also comprises:
(d1) based on transmitting power P by the following definite WTRU of down link (DL) reference signal that serves the transmission of e Node B Tx:
P Tx=max (min (SINR T+ PL+IN 0+ K+ Δ (IoT S), P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to this WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm, and Δ (IoT S) to represent UL load control step-length, this step-length be the UL interference load designator IoT of strong neighbor cell SFunction.
8. method according to claim 5, wherein step (a) also comprises:
(a1) described WTRU carries out based on TPC process in the open loop sub-district of path loss so that the transmitting power for the initial UL stage to be set.
9. method according to claim 1, wherein said UL CQI is the UL License Info.
10. method according to claim 2, wherein step (d) also comprises:
(d1) described e Node B is measured the UL interference level;
(d2) described e Node B determines whether measured UL interference level surpasses predetermined threshold; And
(d3) the rule-based or triggering broadcasting interference load designator of described e Node B, whether the measured UL interference level of wherein said interference load designator indication surpasses predetermined threshold.
11. being UL, method according to claim 10, wherein measured UL interference level disturb thermal noise (IoT) to measure.
12. method according to claim 5, step (a) and (b) carry out afterwards wherein in step (e), and step (b) also comprises:
(b1) following calculating WTRU transmitting power:
P Tx=max (min (SINR T+ PL+IN 0+ K+ α f (CQI, SINR T), P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, f (CQI, SINR T) being based on the closed-loop corrected factor of UL CQI and corresponding target SINR, α is a weighting factor, and P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm.
13. method according to claim 12, wherein 0≤α≤1.
14. method according to claim 12, wherein said closed-loop corrected factor f (CQI, SINR T) be used to compensate open loop TPC correlated error.
15. method according to claim 12, wherein consider the SINR that UL CQI representative receives at e Node B place, (CQI is according to from the UL CQI feedback calculation of service e Node B by WTRU SINRT) to described closed-loop corrected factor f, f (CQI, SINT thus T)=SINR T-E{SINR Est(CQI) } (dB), SINR wherein Est(CQI) representative is that the SINR that receives of e Node B estimates, this estimations then is that WTRU derives from UL CQI feeds back and obtains.
16. method according to claim 15, wherein E{SINR Est(CQI) } expression is estimation SINR mean value with respect to the time, thus:
E{SINR Est(CQI k)=ρ E{SINR Est(CQI K-1)+(1-ρ) E{SINR Est(CQI k), CQI wherein kRepresent k CQI that receives, ρ then is the average filter coefficient, 0≤ρ≤1.
17. a wireless transmitter/receiver unit (WTRU) that is used to carry out transmitting power control (TPC), this WTRU comprises:
(a) receiver;
(b) with the processor of this receiver electric coupling, this processor is configured to carry out open loop sub-district TPC process based on periodicity up link (UL) the path loss measurement from this WTRU to the evolved Node B of the service that is arranged in Serving cell (e Node B), and based on carrying out TPC process in the closed loop sub-district by described receiver from the UL channel quality information (CQI) that described service e Node B receives; And
(c) with the transmitter of this processor electric coupling, this transmitter is configured to based on producing at least one the UL channel with transmitted power level by the combination of carrying out the parameter value that the TPC process is produced in the TPC process and closed loop sub-district in the described open loop sub-district.
18. WTRU according to claim 17, wherein said processor is configured to carry out UL based on the minizone TPC process of disturbing thermal noise (IoT), and described transmitter is configured to produce at least one the UL channel with transmitted power level based on the combination by the parameter value carrying out in the described open loop sub-district TPC process in TPC process, the closed loop sub-district and produced based on the minizone TPC process of IoT.
19. WTRU according to claim 17, wherein said at least one UL channel comprises UL shared data channel.
20. WTRU according to claim 17, wherein said at least one UL channel comprises the UL control channel.
21. WTRU according to claim 17, wherein said receiver is configured to receive a plurality of open loop parameters that sent to WTRU by service e Node B with signal, wherein open loop parameter is sent respectively or is sent as single synthetic parameters, and described processor is configured to based on down link (DL) reference signal that is transmitted by service e Node B and the transmitting power P of the following definite WTRU of open loop parameter Tx:
P Tx=max (min (SINR T+ PL+IN 0+ K, P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, and P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm.
22. WTRU according to claim 18, wherein said processor are configured to the transmitting power P based on the following definite WTRU of down link (DL) reference signal that is transmitted by service e Node B Tx:
P Tx=max (min (SINR T+ PL+IN 0+ K+ Δ (IoT S), P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm, and Δ (IoT S) to represent UL load control step-length, this step-length be the UL interference load designator IoT of strong neighbor cell SFunction.
23. WTRU according to claim 17, wherein said processor are configured to carry out based on TPC process in the open loop sub-district of path loss so that the transmitting power for initial UL transmit stage to be set.
24. WTRU according to claim 17, wherein said UL CQI is the UL License Info.
25. WTRU according to claim 17, wherein said processor are configured to following calculating WTRU transmitting power:
P Tx=max (min (SINR T+ PL+IN 0+ K+ α f (CQI, SINR T), P Max), P Min), SINR wherein TBe to sentence the echo signal interference-to-noise ratio (SINR) that dB is a unit in service e Node B, it is the path loss that comprises shadow fading of unit with dB from service e Node B to WTRU that PL is based on the DL reference signal, IN 0Be to sentence UL interference and the noise power that dBm is a unit in service e Node B, K is the power control tolerance limit that is used to serve the e Node B, f (CQI, SINR T) being based on the closed-loop corrected factor of UL CQI and corresponding target SINR, α is a weighting factor, and P MaxAnd P MinBe respectively to be the minimum and maximum transmitted power level of the transmission of at least one UL channel, carrying out for WTRU of unit with dBm.
26. WTRU according to claim 25, wherein 0≤α≤1.
27. WTRU according to claim 25, wherein said closed-loop corrected factor f (CQI, SINR T) be used to compensate open loop TPC correlated error.
28. WTRU according to claim 25 wherein considers the SINR that UL CQI representative receives at e Node B place, described closed-loop corrected factor f (CQI, SINR T) be by WTRU according to from the UL CQI feedback calculation of service e Node B, f (CQI, SINT thus T)=SINR T-E{SINR Est(CQI) } (dB), SINR wherein Est(CQI) representative is that the SINR that receives of e Node B estimates, this estimations then is that WTRU derives from UL CQI feeds back and obtains.
29. WTRU according to claim 28, wherein E{SINR Est(CQI) } expression is estimation SINR mean value with respect to the time, thus:
E{SINR Est(CQI k)=ρ E{SINR Est(CQI K-1)+(1-ρ) E{SINR Est(CQI k), CQI wherein kRepresent k CQI that receives, ρ then is the average filter coefficient, 0≤ρ≤1.
30. an evolved Node B (e Node B) that is used to carry out transmitting power control (TPC), this e Node B comprises:
(a) processor is configured to measure up link (UL) interference level, and determines whether measured UL interference level surpasses predetermined threshold; With
(b) with the transmitter of processor electric coupling, this transmitter is configured to rule-based or triggers broadcasting interference load designator, and whether the measured UL interference level of wherein said interference load designator indication surpasses predetermined threshold.
31. being UL, e Node B according to claim 30, wherein measured UL interference level disturb thermal noise (IoT) to measure.
32. e Node B according to claim 30, wherein said transmitter are configured to send echo signal interference-to-noise ratio (SINR) level SINR with signal TTo wireless transmitter/receiver unit (WTRU), as at least one function the distance from this e Node B to this WTRU and the given quality requirement.
33. e Node B according to claim 32, wherein said given quality requirement are BLER (block error rate) (BLER).
34. e Node B according to claim 30 also comprises:
(c) mapping table that is electrically connected with described processor, wherein said processor are configured to use this mapping table that the aimed quality value is mapped to target SINR value.
35. e Node B according to claim 34, wherein said aimed quality value are BLER (block error rate) (BLER).
36. e Node B according to claim 30, wherein said transmitter are configured to generate down link (DL) reference signal.
37. e Node B according to claim 30, wherein said transmitter are configured to signal transmitting power control tolerance limit K.
38. according to the described e Node B of claim 37, wherein said power control tolerance limit K is embedded in target SINR SINR TIn, SINR thus T(embedding the back)=SINR T+ K (dB).
39. e Node B according to claim 30, wherein said processor are configured to measure or assess total UL and disturb and noise level IN 0, this IN 0On average be in by processor on the subclass of the subcarrier of use or subcarrier, and described transmitter is configured to send this IN with signal to all 0
40. e Node B according to claim 30, wherein said transmitter are configured to send maximum UL transmitted power level P with signal MaxWith minimum UL transmitted power level P Min
41. e Node B according to claim 30, wherein said transmitter are configured to send UL channel quality information (CQI) with signal.
42. according to the described e Node B of claim 41, wherein said UL CQI comprises UL License Info or modulation and coded set (MCS) information, UL CQI is sent out for the purpose of UL link adaptation at first.
43. e Node B according to claim 30, wherein said transmitter are configured to signal transmitting channel quality information (CQI) mapping ruler, generate to be used for the CQI feedback.
44. a method that is used to carry out the transmitting power control (TPC) of wireless transmitter/receiver unit (WTRU), this method comprises:
(a) described WTRU carries out TPC process in the open loop sub-district by determining set point parameter; And
(b) described WTRU carries out TPC process in the closed loop sub-district by using closed-loop corrected factor, to regulate the set point parameter of being determined by TPC process in the open loop sub-district.
45. according to the described method of claim 44, wherein said set point parameter is up link (UL) path loss from described WTRU to the evolved Node B of the service that is arranged in Serving cell (e Node B), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with this set point parameter.
46. according to the described method of claim 45, wherein said closed-loop corrected factor is the function of UL channel quality information (CQI) and echo signal interference-to-noise ratio (SINR).
47. according to the described method of claim 44, the echo signal interference-to-noise ratio (SINR) of wherein said set point parameter for locating in the evolved Node B of the service that is arranged in Serving cell (e Node B), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with this set point parameter.
48. according to the described method of claim 44, wherein said set point parameter is disturbed and noise power (IN for the UL that locates in the evolved Node B of the service that is arranged in Serving cell (e Node B) 0), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with this set point parameter.
49. according to the described method of claim 44, the power control tolerance limit (K) of wherein said set point parameter for locating in the evolved Node B of the service that is arranged in Serving cell (e Node B), described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with this set point parameter.
50. a wireless transmitter/receiver unit (WTRU) that is used to carry out transmitting power control (TPC), this WTRU comprises:
(a) receiver;
(b) transmitter; With
(c) with the processor of Receiver And Transmitter electric coupling, this processor is configured to carry out TPC process in the open loop sub-district by definite set point parameter, and by using closed-loop corrected factor to carry out TPC process in the closed loop sub-district, to regulate the set point parameter of determining by TPC process in the open loop sub-district.
51. according to the described WTRU of claim 50, wherein said set point parameter is up link (UL) path loss from described WTRU to the evolved Node B of the service that is arranged in Serving cell (e Node B), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with this set point parameter.
52. according to the described WTRU of claim 50, wherein said closed-loop corrected factor is the function of UL channel quality information (CQI) and echo signal interference-to-noise ratio (SINR).
53. according to the described WTRU of claim 50, the echo signal interference-to-noise ratio (SINR) of wherein said set point parameter for locating in the evolved Node B of the service that is arranged in Serving cell (e Node B), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with this set point parameter.
54. according to the described WTRU of claim 50, wherein said set point parameter is disturbed and noise power (IN for the UL that locates in the evolved Node B of the service that is arranged in Serving cell (e Node B) 0), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with this set point parameter.
55. according to the described WTRU of claim 50, the power control tolerance limit (K) of wherein said set point parameter for locating in the evolved Node B of the service that is arranged in Serving cell (e Node B), and described closed-loop corrected factor is used to compensate the open loop TPC correlated error relevant with this set point parameter.
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