CN107105489A - Combined type open/close for E UTRA interference mitigation（Based on CQI）Up-link transmission power is controlled - Google Patents

Combined type open/close for E UTRA interference mitigation（Based on CQI）Up-link transmission power is controlled Download PDF

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CN107105489A
CN107105489A CN201610979452.8A CN201610979452A CN107105489A CN 107105489 A CN107105489 A CN 107105489A CN 201610979452 A CN201610979452 A CN 201610979452A CN 107105489 A CN107105489 A CN 107105489A
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wtru
cqi
sinr
tpc
nodes
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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]

Abstract

Disclose a kind of method and apparatus for being used to perform wireless transmitter/receiver unit (WTRU) transmission power control (TPC).Receiver receives down link control information (DCI).The DCI includes uplink scheduling information and TPC information.Processor determines the transmitted power level for physical uplink link channel.Identified transmitted power level is based at least one path loss factor, and the path loss factor is conditioned in response to TPC information and measured path loss.Then emitter on schedule information and identified transmitted power level physically Downlink channels based on transmitting information.

Description

Combined type open/close (being based on CQI) for E-UTRA interference mitigation is up Link transmission power is controlled
The application is the applying date for September in 2007 26 days, Application No. 200780037073.6, entitled " is used for The Chinese patent Shen of combined type open/close (being based on CQI) the up-link transmission power control of E-UTRA interference mitigation " Divisional application please.
Technical field
The present invention relates to wireless communication system.
Background technology
For evolved universal terrestrial radio access (E-UTRA) up-link (UL), the warp-wise third generation at present Partner program (3GPP) Long Term Evolution (LTE) working group 1 (WG1) have submitted some transmission power controls (TPC) and carry View.These proposals can be generally divided into (slow) open loop TPC and slow closed loop or the TPC based on channel quality information (CQI).
Open loop TPC is that its path loss measurement is wirelessly to send out based on path loss measurement and systematic parameter Penetrate/receiving unit (WTRU) on perform, and systematic parameter is provided by evolved node B (e node B).
Closed loop TPC be typically by from e nodes B periodically send TPC feedback informations (such as TPC orders) based on, Wherein the feedback information is typically used in the Signal Interference and Noise Ratio (SINR) measured at e nodes B come what is be derived by.
For example, open loop TPC can very effectively compensate long-term letter in the case of no transmission power historical record Road changes (such as path loss and shadow fading (shadowing)).But, open loop TPC normally results in path loss measurement Error and transmission power step-up error.On the other hand, the TPC due to slow closed loop or based on CQI is with from e node B signals Based on the feedback of notice, therefore, the error during it is set to measurement and transmission power is less sensitive.However, when because UL When transmission pause or feedback transmission pause are without available feedback, or when channel variation is violent, slow closed loop or it is based on CQI TPC will reduce performance.
The content of the invention
For E-UTRA UL, what is considered is that path loss and shade are at least compensated by TPC, and/or is mitigated Interference.It disclosed herein a kind of enhanced UL that open loop TPC schemes and closed loop TPC are combined togather with interference mitigation TPC schemes.Closed loop TPC is based on CQI (such as UL License Infos or modulation and encoding setting (MCS) information).It is this Enhanced UL TPC schemes can be used for UL data and control channel.In addition, this enhanced UL TPC schemes proposed are also It is very flexible, and dynamical system/link parameter and channel status are adaptive to, to reach E-UTRA UL demand.
In addition, in the case where channel and CQI estimations are based on UL reference signals, in order to avoid severe UL believes Road and CQI estimation, it is proposed that performed with such as 100Hz etc low rate for data channel UL TPC (that is, Perform a TPC per one or two mixed automatic repeat request (HARQ) cycle periods to update).To control associated with data For signaling processed, it is assumed that maximum CQI reporting rates are that every 1 millisecond of Transmission Time Interval (TTI) is carried out once, then TPC updates Speed can increase to 1000Hz,
Brief description of the drawings
Read by reference to accompanying drawing, general introduction above and follow-up detailed description may be better understood, its In：
Fig. 1, which is shown, includes WTRU and e nodes B wireless communication system；And
The flow chart for the TPC processes implemented by Fig. 1 systems is shown in Fig. 2.
Embodiment
The term " wireless transmitter/receiver unit (WTRU) " hereafter quoted includes but is not limited to user equipment (UE), shifting Dynamic station, fixed or moving user unit, pager, cell phone, personal digital assistant (PDA), computer or other are any The user equipment that can be worked in wireless environments.The term " evolved node B (e node B) " hereafter quoted includes but not limited to In base station, node B, cell, site controller, access point (AP) or other any interfaces that can be worked in wireless environments Equipment.
The radio communication system including at least one WTRU 105 and at least one service e node B 110 is shown in Fig. 1 System 100.The WTRU 105 includes receiver 115, emitter 120, processor 125 and at least one antenna 130.Service e Node B 110 includes emitter 135, receiver 140, processor 145, mapping table 150 and at least one antenna 155.WTRU 105 and e nodes B 110 is to control to believe via downlink (DL) control channel 160, UL shared datas channel 165 and UL Road 170 communicates.
Processor 145 in e nodes B 110 performs UL interference thermal noises according to the signal received by receiver 140 (IoT) measure, and the IoT measurement results measured are compared with predetermined threshold.Processor 145 can also generate interference load Designator, the designator then can by e nodes B 110 emitter 135 it is rule-based or triggering mode broadcasted.This is done That disturbs load designator instruction is whether the IoT measurements performed on e nodes B 110 exceed predetermined threshold.When in WTRU 105 Receiver 115 when receiving and having decoded the interference load designator, the processor 125 in WTRU 105 can determine that e is saved The state of IoT at point B 110, the state can be used for mitigating the inter-cell interference in e nodes B 110.
When WTRU 105 is located at specific cell, it can hold according to systematic parameter and path loss measurement result to perform Ring TPC.WTRU 105 mitigates the inter-cell interference in e nodes B 110 according to interference load designator, wherein the e nodes B 110 is in adjacent and compared with other neighbor cells among most strong cell with the specific cell.The most strong cell Refer to that WTRU 105 has the cell of highest path gain (namely lowest path loss) to it.Then, to being possible to because Open loop error and for the transmission power that is biased, WTRU 105 according to the CQI received via DL control channels 160 and Target SINR come correct its based on open loop calculate transmission power, so as to compensate open loop error.
It should be noted that CQI refers to that e nodes B 110 is controlled to believe with signal via the DL for UL link circuit self-adaptings Road 160 and to WTRU 105 notice UL License Infos (or MCS).What CQI was represented is that service e nodes B 110 controls to believe in DL The UL channel qualities specific to WTRU fed back in road 160 to WTRU 105.In E-UTRA, CQI is with UL License Infos What form was provided.Target SINR is specific for WTRU parameter, and the parameter is determined by e nodes B 110, and is by higher Layer signaling and be signaled to WTRU's 105.
The transmission power P of WTRU 105 for UL shared datas channel 165TxIt is the emitter 135 according to e nodes B 110 The DL reference signals 175 launched and determined in initial transmission phase.DL reference signals 175 have known transmitting work( Rate, and WTRU 105 is to carry out execution route loss measurement using the transmission power.For the TPC of Intra-cell, WTRU 105 Initial Trans PTxDefine according to open loop TPC and as follows：
PTx=max (min (SINRT+PL+IN0+K,Pmax),Pmin) equation (1A)
Wherein SINRTIt is the echo signal interference-to-noise ratio (SINR) at service e nodes B 110 in units of dB, and And PL is path loss (the namely one set point ginseng from service e nodes B 110 to WTRU 105 and in units of dB Number), among these including shadow fading.WTRU 105 is then lost according to DL reference signals 175 come measuring route, wherein the signal Transmission power via DL signalings be known on WTRU 105.Value IN0Be service e nodes B 110 at using dBm as The UL interference of unit and noise power.K is to may deviate from actual transmission work(in practice account for DL reference signals 175 It is used for the power control margin for servicing e nodes B 110 in the case of rate.PmaxAnd PminBe respectively in units of dBm for The minimum and maximum transmitted power level for the transmission that WTRU 105 is carried out on UL shared datas channel 165.
Assuming that the target SINR for WTRU 105 (or WTRU subgroup) is can be according to service e nodes B 110 Some measure to adjust.And outer shroud TPC schemes then can be used for target SINR regulations.Generally, target SINR is to be based on UL What the target link quality (such as BLER(block error rate) (BLER)) of shared data channel 165 was determined.In addition, different multipath fadings Channel status usually requires the different target SINR (such as BLER) for specifying target link quality.Correspondingly, this is measured Including the target link quality (and being likely to be fading channel quality) for WTRU 105.
For UL multiple-input and multiple-outputs (MIMO), needed in view of different MIMO modes for given link quality In the case of the different capacity or SINR of (such as BLER), target SINR additionally depends on selected MIMO mode.In such case Under, WTRU 105 can include multiple antennas 130.
As replacement, WTRU 105 transmission power can be defined as containing minizone TPC, as follows：
PTx=max (min (SINRT+PL+IN0+K+Δ(IoTS),Pmax),Pmin) equation (1B) its intermediate value Δ (IoTS) UL load control step-lengths are represented, the step-length is the UL interference load designators (IoT of most strong (S) neighbor cellS)IoTS Function.
Δ(IoTS) integer value is chosen, it is as follows：
Wherein δ is reservation system parameter, such as δ=- 1 or -2dB.By using Δ (IoTS), it can mitigate adjacent small Inter-cell interference in area.Interference due to bringing other cells positioned at the WTRU of center of housing estate is less than those and is in cell side Segmentation in the WTRU of edge, therefore load control step-length considers as follows：
Wherein x is the inter-cell load control factor of segmentation.
Most strong neighbor cell be based on from single neighbor cell to WTRU 105 path loss measure and in WTRU 105 Upper determination, wherein the most strong neighbor cell be in the cell adjacent with the current cell for providing service for WTRU 105 with WTRU 105 has the neighbor cell of lowest path loss.
By introducing Δ (IoTS), inter-cell interference (such as minizone TPC) can be mitigated, most strong neighbor cell is come Say then especially true.For the TPC of minizone, e nodes B will measure UL interference (with rule or periodic form), then then It can determine whether whether the interference level measured exceeds predetermined threshold.The state of the UL interference finally given is to use IoTS(namely Load designator) and from e nodes B 110 broadcast (with rule or periodic form).For example, it is somebody's turn to do if interference exceeds Threshold value, then IoTSIt is arranged to 1, so, is done because e nodes B 110 can suffer from excessive minizone in UL Disturb, therefore, its transmission power is reduced a certain amount of by the WTRU that e nodes B 110 will be in order neighbor cell.Otherwise, IoTSWill 0 is configured to, thus e nodes B 110 will receive current UL interference levels, and so, the WTRU in neighbor cell is not required to Reduce its transmission power.WTRU 105 is then decoded to the load designator for being received from most strong neighbor cell, then then can Follow the order (IoTS).If by IoTSIt is decoded as 1, then WTRU 105 transmission power reduces Δ (IoTS), that is, Say, Δ (IoTS)<0dB.If by IoTSIt is decoded as 0, then Δ (IoTS)=0dB.
Assuming that each cell all periodic broadcast UL interference loads bit (with High Speed Uplink Packet access (HSUPA) relative grant in is similar), thus WTRU 105 can decode the instruction from selected most strong neighbor cell Accord with bit.The WTRU 105 can according to serving cell between most strong neighbor cell path loss ratio judge at it In cell edge or Intra-cell.As replacement, the inter-cell load control factor x of segmentation can be defined as below：
After initial transmission phase, WTRU 105 is being powered (similar with RACH (RACH) processing therebetween Like) or set up after session connection and immediately begin to implement its TPC, WTRU transmission power is calculated as below：
Ptx=max (min (SINRT+PL+IN0+K+α·f(CQI,SINRT),Pmax),Pmin) equation (5)
Wherein f (CQI, SINRT) it is closed loop correction factor (such as UL based on UL CQI and corresponding target SINR License Info or MCS information).Weighting factor α can come true according to channel status and CQI availabilities (or UL transmission pause) It is fixed, wherein 0≤α≤1.For example, if as lacking the UL data transfers of scheduling without can be from e nodes B 110 The UL CQI arrived (UL permits or MCS information), then weighting factor α will be arranged to 0.Otherwise, weighting factor α will be set For 1.Although weighting factor α for simplicity, has been arranged into 0 or 1 herein, replaces embodiment and further comprises With channel status and the adaptable adaptive α values of UL/DL channel configurations.
Correction factor f (CQI, SINRT) open loop TPC related errors are used to compensate for, among these including being mainly due to UL With the emitter of the path loss measurement error of imperfect reciprocities of the DL in FDD (FDD), and WTRU 105 Due to being damaged caused by non-linear power amplification in 120.In addition to the path loss as set point parameter, e nodes B 110 can also promote correction factor to adjust TPC relevant system parameters, such as SINR, IN0And K, these parameters are equally It is set point parameter.For example, be necessarily specified WTRU 105 regulation target SINR in e nodes B 110, and then allow WTRU 105 understand the regulation when, e nodes B 110 can for WTRU 105 accordingly regulation CQI (UL licenses), rather than directly use believe Number target SINR is advertised to WTRU 105.The SINR received at e nodes B 110, the school are represented in view of UL CQI Positive factor is to be calculated by WTRU 105 according to UL CQI (UL permits or MCS information) feedback from service e nodes B 110 's.For example,
f(CQI,SINTT)=SINRT-E{SINRest(CQI) } (dB) equation (6) wherein SINRest(CQI) represent It is the SINR estimations that e Node-B receivers are arrived, the estimation is then that WTRU 105 is derived by from UL CQI feedbacks.E{SINRest (CQI) what is } represented is the estimation SINR average values relative to the time, thus：
E{SINRest(CQIk)=ρ E { SINRest(CQIk-1)}+(1-ρ)·E{SINRest(CQIk) equation (7)
Wherein CQIkThe CQI received for k-th that is represented, ρ are then averaging filter coefficients, and 0≤ρ≤1.
To difference as described above between target SINR and estimation SINR (being derived by from the CQI reported) to For the correction factor gone out, what the correction factor was typically represented is the open loop TPC related errors for needing to compensate.
For the e node B signalings of the TPC schemes proposed
Target SINR level SINRTIt is a parameter specific to WTRU (or WTRU subgroups), as from e nodes B The function (such as path loss) and/or such as BLER etc specified quality requirement of 110 to WTRU 105 distance, the ginseng Number can be advertised to WTRU 105 with signal by e nodes B 110.Generally, e nodes B 110 is come by mesh using mapping table 150 Mark quality (such as BLER) is mapped to target sinr values.How to generate this mapping table is then e nodes B (or carrier operations Business) proprietary scheme.Target SINR can be conditioned by outer loop mechanism.Target SINR signaling is borrowed when it is adjusted The L1/2 control signalings that help in band are completed.
Power control margin K is primarily used for DL reference signals and specific to e nodes B parameter, and the parameter can be by E nodes B 110 is advertised to WTRU 105 with signal.For example, because DL reference signals 175 are passed with constant emission power level Send, and the level can be understood by higher level signaling on WTRU, therefore, DL reference signals 175 can be used for WTRU 105 path loss measurement.But, the actual emission power of DL reference signals 175 is possible to the proprietary side because e nodes B Case and different from the performance number noticed with signal.In this case, power excursion will be between actual use transmission power With between the transmission power noticed by broadcast channel (BCH) in semi-static mode.For K, it is likely to be half quiet State, and be advertised by broadcast channel (BCH).The information is then used for its UL/DL path loss by WTRU 105 Calculate.It should be noted that although it is assumed that power control margin K is individually noticed together with other specification with signal, still It can also be embedded in target SINR i.e. SINRTIn, thus：
SINRT(after insertion)=SINRT+ K (dB) equation (8)
In this case, K is It is not necessary to be advertised to WTRU 105 with dominant signal.
To total UL interference and noise level IN0For, it is averaged in all (or wireless in the subcarrier used Electricity carrying (RB)) or the subset of subcarrier on, the level can be advertised to WTRU 105 with signal by e nodes B 110.This Individual level is (and can be noticed by BCH) for being measured/being derived by by e nodes B 110.The renewal rate of the signaling It is generally relatively low.And e nodes B 110 is then proprietary schemes of e nodes B using such as noise estimation techniques etc and to advise Then mode measure/estimate IN0's.
To minimum and maximum UL transmitted power levels PmaxAnd PminFor, these level can be by the letters of e nodes B 110 Number it is advertised to WTRU 105.In addition, these level both can be the parameter according to WTRU abilities, can also be by e nodes B 110 Clearly noticed with signal.
UL CQI (such as UL License Infos or MCS information) are for UL link circuit self-adaptings (such as Adaptive Modulation and Coding (MCS)) and initially noticed with signal (its maximum signaling rate be each TTI once, such as 1000Hz), and the UL CQI can be advertised to WTRU 105 with signal by e nodes B 110.
UL CQI (such as UL License Infos) be by e nodes B 110 be advertised to signal WTRU 105 specific to WTRU Feedback information.Although UL CQI are initially used to UL link circuit self-adaptings, it is also used for proposed combined type open loop With closed loop TPC closed loop portion.Generally, CQI (UL licenses) is to be based on UL channel status (such as SINR at e nodes B 110 Measurement result) and SINR-CQI mapping rulers and be derived what is obtained, it means that UL CQI are represented in e nodes B 110 The SINR that place is measured.Correspondingly, once WTRU 105 receives CQI and is given for the SINR- at e nodes B 110 The mapping ruler of CQI mappings, then the CQI received can be interpreted as SINR estimations by WTRU 105.Estimated SINR is then It is used to calculate correction term according to equation (6).
E nodes B 110 is anti-to implement CQI using CQI mapping rulers (or deviation between CQI and measured SINR) Feedback generation, and the rule can be advertised to WTRU 105 with signal by e nodes B 110.In addition, this rule or parameter It can be combined in target SINR.In this case, the dominant signaling of regular (or parameter) is unwanted.
Due to above-mentioned TPC schemes need not be in addition to systematic parameter listed above additional feedback TPC orders, this its Include can be with very slow speed broadcast (or directly being noticed with signal) to WTRU target SINR, area interference/noise Level, reference signaling transmission power and steady state value, therefore, the program are very favorable.In addition, above-mentioned TPC schemes are set Meter very flexibly, and with dynamical system/link parameter (target SINR and inter-cell interference load condition) and channel shape State (path loss and shadow fading) is adapted, it is possible thereby to reach E-UTRA demand.In addition, above-mentioned TPC schemes also with Other link adaptation schemes are mutually compatible, such as AMC, HARQ and adaptive MIMO.
Although solution proposed here is for being proposed on E-UTRA by UL CQI (such as UL License Infos) UL combined type open loop and closed loop TPC closing member (such as correction factor), but be used as and replace, e nodes B 110 also may be used Having to explicitly to notice a corrective command being embedded into UL License Infos to WTRU 105 with signal.In this case, This can be used for closed loop correction factor by WTRU 105 with the corrective command of the dominant notice of signal (may tie with UL CQI phases Close).If in addition, service e nodes B 110 coordinates the inter-cell interference between other cells, and by correspondingly adjusting Program mark SIR or possible PmaxTo be merged to it, then the interference that the TPC proposed can be also used for minizone subtracts Gently.
In order to realize that accurate UL channel estimations (being used for UL data/control signaling demodulation) and CQI estimations (are used for UL Scheduling and link circuit self-adapting), it may be desirable to UL reference signal transmission powers are adjusted with comparatively faster speed, so as to Severe channel and/or system mode are tackled as quickly as possible.Even if the UL TPC proposed above for data channel with compared with Slow rate updates WTRU transmission powers (in the case of in view of every 1 millisecond of TTI UL AMC), up to 100Hz renewal speed (for example just being updated once per one or two HARQ cycle periods) that rate also can be achieved on, so as to avoid severe UL letters Road and CQI estimations.The renewal rate is controlled by WTRU 105, thus it is preferable to WTRU 105 can be each Updated when receiving CQI.
For UL control signalings, WTRU 105 will use the combinations thereof formula TPC schemes with following deviation.When UL CQI can use, and maximum CQI speed is when being every 1 millisecond of TTI mono- time, at this moment will use quick TPC renewal rates (such as 1000Hz).In this case, correction factor f (CQI, the SINR in equation (5)T) can be expressed as follows：
f(CQI,SINRT)=SINRT-SINRest(CQI) (dB) equation (9)
Wherein CQI is newest UL CQI.In addition, weighting factor is set equal to 1 (α=1).This will cause group Box-like open loop and the TPC based on CQI.When no UL CQI are available, the TPC parts based on CQI by it is disabled (also It is to say α=0).And this can only produce open loop TPC.
For UL shared datas channel 165, WTRU 105 will the open loop according to combination and the TPC based on CQI with all Its transmission power is determined such as 100Hz slower renewal rate.In initial transmission and/or can not be from e nodes B 110 During to available UL CQI, such as during transmission pause, the transmission power control part based on CQI will be disabled, and Used is only open loop TPC.
For UL shared datas channel 165, WTRU 105 will the open loop according to combination and the TPC based on CQI with all Its transmission power is determined such as 1000Hz very fast renewal rate.When available UL CQI can not be obtained from e nodes B 110, For example during transmission pause, the transmission power control part based on CQI will be disabled, and used is only out Ring TPC.
E nodes B 110 broadcasts the systematic parameter associated with TPC, among these including its reference signal transmission power electricity Flat, interference level and power margin.In addition, e nodes B 110 also with signal to WTRU 105 notice it is associated with TPC and Specific to WTRU parameter, among these including target SINR, WTRU maximal power level and Minimum Power Level, wherein believing Order is completed by the L1/2 layer control signalings in band.And outer shroud then can be used for regulation target SINR.
The flow chart for the TPC processes 200 that can be implemented by Fig. 1 systems 100 is shown in Fig. 2.In step 205, implement Initial UL transmission phase.WTRU 105 is performed based on path loss according to the systematic parameter of the service offers of e nodes B 110 TPC processes in open loop intra-cell, to set transmission power (such as similar with RACH processes) for the initial UL transmission stages, its Described in systematic parameter can be SINR, IN0, K and DL reference signals 175 transmission power (step 210).In step In 215, implement the normal UL transmission stages.WTRU 105 can then be held based on the systematic parameter of the service offers of e nodes B 110 TPC processes in open loop intra-cell of the row based on path loss, and the UL CQI (UL that will be provided based on service e nodes B 110 License Info) perform TPC processes (step 220) in closed loop (be based on CQI) cell.Alternatively, WTRU will be based on from institute There is the load designator (IoT) that neighbor cell (e node B) is received to perform TPC processes (step in the cell based on IoT 225).In step 230, the value that WTRU 105 will be according to produced by performing step 220 (and optional step 225) come The transmission power of at least one UL channel (such as UL shared datas channel 165, UL control channels 170) is set.
Embodiment
1. one kind is used for the method for performing wireless transmitter/receiver unit (WTRU) transmission power control (TPC), the party Method includes：
(a) WTRU performs TPC processes in open loop intra-cell by determining set point parameter；And
(b) WTRU performs TPC processes in closed loop cell by using closed loop correction factor, to adjust by open loop The set point parameter that TPC processes are determined in cell.
2. the method according to embodiment 1, wherein the set point parameter is from the WTRU to positioned at serving cell In serving evolved Node B (e node B) up-link (UL) path loss, and the closed loop correction factor is used for The compensation open loop TPC related errors relevant with set point parameter.
3. the method according to any embodiment in Examples 1 and 2, wherein the closed loop correction factor is uplink The function of road (UL) channel quality information (CQI) and echo signal interference-to-noise ratio (SINR).
4. the method according to any embodiment in embodiment 1 and 3, wherein the set point parameter is positioned at clothes Be engaged in cell in serving evolved Node B (e node B) place echo signal interference-to-noise ratio (SINR), it is described it is closed-loop corrected because Number is used to compensate for the open loop TPC correlated error relevant with set point parameter.
5. the method according to any embodiment in embodiment 1 and 3, wherein the set point parameter is positioned at clothes The UL interference at serving evolved Node B (e node B) place in cell of being engaged in and noise power (IN0), the closed loop correction factor It is used to compensate for the open loop TPC related errors relevant with set point parameter.
6. the method according to any embodiment in embodiment 1 and 3, wherein the set point parameter is positioned at clothes The power control margin (K) at serving evolved Node B (e node B) place in cell of being engaged in, the closed loop correction factor is used for The compensation open loop TPC related errors relevant with set point parameter.
7. one kind is used for the wireless transmitter/receiver unit (WTRU) for performing transmission power control (TPC), the WTRU includes：
(a) receiver；
(b) emitter；With
(c) processor being electrically coupled with Receiver And Transmitter, the processor is configured to by determining set point parameter To perform TPC processes in open loop intra-cell, and TPC processes in closed loop cell are performed by using closed loop correction factor, to adjust The set point parameter that TPC processes are determined in open loop intra-cell.
8. the WTRU according to embodiment 7, wherein the set point parameter is from the WTRU to positioned at serving cell In serving evolved Node B (e node B) up-link (UL) path loss, and the closed loop correction factor is used for The compensation open loop TPC related errors relevant with set point parameter.
9. the WTRU according to any embodiment in embodiment 7 and 8, wherein the closed loop correction factor is UL channels The function of quality information (CQI) and echo signal interference-to-noise ratio (SINR).
10. the WTRU according to any embodiment in embodiment 7 and 9, wherein the set point parameter is positioned at clothes Be engaged in cell in serving evolved Node B (e node B) place echo signal interference-to-noise ratio (SINR), it is described it is closed-loop corrected because Number is used to compensate for the open loop TPC correlated error relevant with set point parameter.
11. the WTRU according to any embodiment in embodiment 7 and 9, wherein the set point parameter is positioned at clothes The UL interference at serving evolved Node B (e node B) place in cell of being engaged in and noise power (IN0), the closed loop correction factor It is used to compensate for the open loop TPC correlated error relevant with set point parameter.
12. the WTRU according to any embodiment in embodiment 7 and 9, wherein the set point parameter is positioned at clothes The power control margin (K) at serving evolved Node B (e node B) place in cell of being engaged in, the closed loop correction factor is used for The compensation open loop TPC related errors relevant with set point parameter.
13. one kind is used for the method for performing wireless transmitter/receiver unit (WTRU) transmission power control (TPC), the party Method includes：
(a) weeks of the WTRU based on the serving evolved Node B (e node B) from the WTRU in positioned at serving cell Phase property up-link (UL) path loss measurement performs TPC processes in open loop intra-cell；
(b) WTRU by the service e nodes B based on being supplied to the UL channel quality informations (CQI) of the WTRU to hold TPC processes in row closed loop cell；And
(c) WTRU is based on by performing in the open loop intra-cell that TPC processes are produced in TPC processes and closed loop cell The combination of raw parameter value sets the transmitted power level of at least one UL channel.
14. the method according to embodiment 13, in addition to：
(d) WTRU performs the minizone TPC processes that UL is based on interference thermal noise (IoT), and wherein step (c) is also wrapped The WTRU is included based on the TPC processes by performing TPC processes in the open loop intra-cell, in closed loop cell and the minizone based on IoT The combination of parameter value produced by TPC processes sets the transmission power of at least one UL channel.
15. the method according to any embodiment in embodiment 13 and 14, wherein at least one described UL channel includes UL shared data channels.
16. the method according to any embodiment in embodiment 13 and 14, wherein at least one described UL channel includes UL control channels.
17. the method according to embodiment 14, in addition to：
(e) initial UL transmission phase is implemented to the WTRU.
18. the method according to embodiment 17, wherein step (a) also include：
(a1) the service e nodes B sends multiple open loop parameters to the WTRU with signal, and wherein open loop parameter is divided Fa Song or it not sent as single synthetic parameters；And
(a2) WTRU is identified below based on downlink (DL) reference signal and open loop parameter by servicing e nodes B transmission Transmission power PTx：
PTx=max (min (SINRT+PL+IN0+K,Pmax),Pmin), wherein SINRTBe service e nodes B at using dB as The echo signal interference-to-noise ratio (SINR) of unit, PL be based on DL reference signals from service e nodes B to WTRU using dB as Unit includes the path loss of shadow fading, IN0It is the UL interference at service e nodes B in units of dBm and noise work( Rate, K is the power control margin for servicing e nodes B, and PmaxAnd PminIt is for WTRU respectively in units of dBm The minimum and maximum transmitted power level of the transmission carried out at least one UL channel.
19. the method according to embodiment 17, wherein step (d) also include：
(d1) WTRU transmission power is identified below based on downlink (DL) reference signal by servicing e nodes B transmission PTx：
PTx=max (min (SINRT+PL+IN0+K+Δ(IoTS),Pmax),Pmin), wherein SINRTIt is in service e nodes B The echo signal interference-to-noise ratio (SINR) that dB is unit is sentenced, PL is to be based on DL reference signals from service e nodes B to WTRU Include the path loss of shadow fading, IN in units of dB0It is the UL interference at service e nodes B in units of dBm And noise power, K is the power control margin for servicing e nodes B, PmaxAnd PminBe respectively in units of dBm for The minimum and maximum transmitted power level for the transmission that WTRU is carried out at least one UL channel, and Δ (IoTS) represent UL Load control step-length, the step-length is the UL interference load designators IoT of most strong neighbor cellSFunction.
20. the method according to embodiment 17, wherein step (a) also include：
(a1) WTRU performs in the open loop intra-cell based on path loss TPC processes to set for initial UL transmission The transmission power in stage.
21. the method according to any embodiment in embodiment 13-20, wherein the UL CQI are UL License Infos.
22. the method according to embodiment 14, wherein step (d) also include：
(d1) the e nodes B measurements UL interference levels；
(d2) the e nodes B determines whether measured UL interference levels exceed predetermined threshold；And
(d3) the e nodes B is rule-based or interference load designator is broadcasted in triggering, wherein the interference load is indicated Accord with whether the UL interference levels measured by instruction exceed predetermined threshold.
23. the method according to embodiment 22, wherein measured UL interference levels are UL interference thermal noises (IoT) Measurement.
24. the method according to embodiment 17, wherein step (a) and (b) are performed after step (e), and step (b) also include：
(b1) WTRU transmission powers are calculated as below：
Ptx=max (min (SINRT+PL+IN0+K+α·f(CQI,SINRT),Pmax),Pmin), wherein SINRTIt is in service E nodes B sentences the echo signal interference-to-noise ratio (SINR) that dB is unit, and PL is to be based on DL reference signals from service e nodes B Include the path loss of shadow fading, IN in units of dB to WTRU0It is to service at e nodes B in units of dBm UL is disturbed and noise power, and K is the power control margin for servicing e nodes B, f (CQI, SINRT) be based on UL CQI with And corresponding target SINR closed loop correction factor, α is weighting factor, and PmaxAnd PminIt is in units of dBm respectively For the minimum and maximum transmitted power level of the WTRU transmission carried out at least one UL channel.
25. the method according to embodiment 24, wherein 0≤α≤1.
26. the method according to any embodiment in embodiment 24 and 25, wherein the closed loop correction factor f (CQI, SINRT) it is used to compensate for open loop TPC related errors.
27. the method according to any embodiment in embodiment 24-26, wherein being represented in view of UL CQI in e nodes The SINR received at B, closed loop correction factor f (CQI, the SINRT) it is according to the UL from service e nodes B by WTRU What CQI feedback was calculated, thus f (CQI, SINTT)=SINRT-E{SINRest(CQI) } (dB), wherein SINRest(CQI) represent Be e Node-B receivers arrive SINR estimation, the estimation is then that WTRU is derived by from UL CQI feedbacks.
28. the method according to embodiment 27, wherein E { SINRest(CQI) what is } represented is the estimation relative to the time SINR average values, thus：
E{SINRest(CQIk)=ρ E { SINRest(CQIk-1)}+(1-ρ)·E{SINRest(CQIk), wherein CQIkGeneration The CQI that table is received for k-th, ρ is then averaging filter coefficient, 0≤ρ≤1.
29. one kind is used for the wireless transmitter/receiver unit (WTRU) for performing transmission power control (TPC), the WTRU bags Include：
(a) receiver；
(b) with the processor of reception mechanical-electric coupling, the processor is configured to be based on from the WTRU to positioned at serving cell In serving evolved Node B (e node B) periodic uplink (UL) path loss measurement perform in open loop intra-cell TPC processes, and based on by the receiver from the service e Node-B receivers to UL channel quality informations (CQI) hold TPC processes in row closed loop cell；And
(c) emitter being electrically coupled with processor, the emitter is configured to be based on by performing in the open loop intra-cell The combination of parameter value in TPC processes and closed loop cell produced by TPC processes produces at least one with transmitted power level Individual UL channels.
30. the WTRU according to embodiment 29, wherein the processor is configured to perform UL based on interference thermal noise (IoT) minizone TPC processes, and the emitter be configured to be based on by performing TPC mistakes in the open loop intra-cell The combination of TPC processes and the parameter value produced by minizone TPC processes based on IoT has hair to produce in journey, closed loop cell Penetrate at least one UL channel of power level.
31. the WTRU according to any embodiment in embodiment 29 and 30, wherein at least one described UL channel includes UL shared data channels.
32. the WTRU according to any embodiment in embodiment 29 and 30, wherein at least one described UL channel includes UL control channels.
33. the WTRU according to any embodiment in embodiment 29-32, wherein the receiver is configured to receive WTRU multiple open loop parameters are signaled to by servicing e nodes B, wherein open loop parameter is sent separately or as single Synthetic parameters are sent, and the processor is configured to believe based on downlink (DL) benchmark by servicing e nodes B transmission Number and open loop parameter WTRU transmission power P is identified belowTx：
PTx=max (min (SINRT+PL+IN0+K,Pmax),Pmin), wherein SINRTBe service e nodes B at using dB as The echo signal interference-to-noise ratio (SINR) of unit, PL be based on DL reference signals from service e nodes B to WTRU using dB as Unit includes the path loss of shadow fading, IN0It is the UL interference at service e nodes B in units of dBm and noise work( Rate, K is the power control margin for servicing e nodes B, and PmaxAnd PminIt is for WTRU respectively in units of dBm The minimum and maximum transmitted power level of the transmission carried out at least one UL channel.
34. the WTRU according to embodiment 30, wherein the processor is configured to be based on by servicing e nodes B transmission Downlink (DL) reference signal WTRU transmission power P is identified belowTx：
PTx=max (min (SINRT+PL+IN0+K+Δ(IoTS),Pmax),Pmin), wherein SINRTIt is in service e nodes B The echo signal interference-to-noise ratio (SINR) that dB is unit is sentenced, PL is to be based on DL reference signals from service e nodes B to WTRU Include the path loss of shadow fading, IN in units of dB0It is the UL interference at service e nodes B in units of dBm And noise power, K is the power control margin for servicing e nodes B, PmaxAnd PminBe respectively in units of dBm for The minimum and maximum transmitted power level for the transmission that WTRU is carried out at least one UL channel, and Δ (IoTS) represent UL Load control step-length, the step-length is the UL interference load designators IoT of most strong neighbor cellSFunction.
35. the WTRU according to any embodiment in embodiment 29-34, wherein the processor is configured to perform TPC processes are to set the transmission power for initial UL transmission phase in open loop intra-cell based on path loss.
36. the WTRU according to any embodiment in embodiment 29-35, wherein the UL CQI are UL License Infos.
37. the WTRU according to any embodiment in embodiment 29-36, wherein the processor be configured to it is as follows Calculate WTRU transmission powers：
Ptx=max (min (SINRT+PL+IN0+K+α·f(CQI,SINRT),Pmax),Pmin), wherein SINRTIt is in service E nodes B sentences the echo signal interference-to-noise ratio (SINR) that dB is unit, and PL is to be based on DL reference signals from service e nodes B Include the path loss of shadow fading, IN in units of dB to WTRU0It is to service at e nodes B in units of dBm UL is disturbed and noise power, and K is the power control margin for servicing e nodes B, f (CQI, SINRT) be based on UL CQI with And corresponding target SINR closed loop correction factor, α is weighting factor, and PmaxAnd PminIt is in units of dBm respectively For the minimum and maximum transmitted power level of the WTRU transmission carried out at least one UL channel.
38. the WTRU according to embodiment 37, wherein 0≤α≤1.
39. the WTRU according to any embodiment in embodiment 37 and 38, wherein the closed loop correction factor f (CQI, SINRT) it is used to compensate for open loop TPC related errors.
40. the WTRU according to any embodiment in embodiment 37-39, wherein being represented in view of UL CQI in e nodes The SINR received at B, closed loop correction factor f (CQI, the SINRT) it is according to the UL from service e nodes B by WTRU What CQI feedback was calculated, thus f (CQI, SINTT)=SINRT-E{SINRest(CQI) } (dB), wherein SINRest(CQI) represent Be e Node-B receivers arrive SINR estimation, the estimation is then that WTRU is derived by from UL CQI feedbacks.
41. the WTRU according to embodiment 40, wherein E { SINRest(CQI) what is } represented is the estimation relative to the time SINR average values, thus：
E{SINRest(CQIk)=ρ E { SINRest(CQIk-1)}+(1-ρ)·E{SINRest(CQIk), wherein CQIkGeneration The CQI that table is received for k-th, ρ is then averaging filter coefficient, 0≤ρ≤1.
42. one kind is used for the evolved node B (e node B) for performing transmission power control (TPC), e nodes B includes：
(a) processor, is configured to measure UL interference levels, and it is pre- to determine whether measured UL interference levels exceed Determine threshold value；With
(b) emitter being electrically coupled with processor, the emitter is configured to rule-based or triggering broadcast interference load Designator, wherein the interference load designator indicates whether measured UL interference levels exceed predetermined threshold.
43. the e node B according to embodiment 42, wherein measured UL interference levels, which are UL, disturbs thermal noise (IoT) measure.
44. the e node B according to embodiment 42, wherein the emitter is configured to send echo signal with signal Interference-to-noise ratio (SINR) level SINRTTo wireless transmitter/receiver unit (WTRU), as from the e nodes B to the WTRU's Distance and the function of at least one of given quality requirement.
45. the e node B according to embodiment 44, wherein given quality requirement is BLER(block error rate) (BLER).
46. the e node B according to any embodiment in embodiment 42-45, in addition to：
(c) mapping table electrically connected with the processor, wherein the processor is configured to use the mapping table by mesh Mark mass value is mapped to target sinr values.
47. the e node B according to embodiment 46, wherein the target quality is BLER(block error rate) (BLER).
48. the e node B according to any embodiment in embodiment 42-47, wherein the emitter is configured to life Into downlink (DL) reference signal.
49. the e node B according to any embodiment in embodiment 42-48, wherein the emitter is configured to use Signal transmitting power control tolerance limit K.
50. the e node B according to embodiment 49, wherein the power control margin K is embedded in target SINR SINRTIn, thus SINRT(after insertion)=SINRT+K(dB)。
51. the e node B according to any embodiment in embodiment 42-50, wherein the processor is configured to survey Measure or assess total UL interference and noise level IN0, the IN0Averagely arrived all in the subcarrier or subcarrier that use by processor Subset on, and the emitter is configured to send the IN with signal0。
52. the e node B according to any embodiment in embodiment 42-51, wherein the emitter is configured to use Signal sends maximum UL transmitted power levels PmaxWith minimum UL transmitted power levels Pmin。
53. the e node B according to any embodiment in embodiment 42-52, wherein the emitter is configured to use Signal sends UL channel quality informations (CQI).
54. the e node B according to embodiment 53, wherein the UL CQI include UL License Infos or modulation and coding Collect (MCS) information, UL CQI are initially sent for the purpose of UL link adaptations.
55. the e node B according to any embodiment in embodiment 42-54, wherein the emitter is configured to use Signal sends channel quality information (CQI) mapping ruler, is generated for CQI feedback.
Although the feature and element of the present invention are described with specific combination in a preferred embodiment, often Individual feature or element can be used alone in the case of other features and element of not described preferred embodiment, or With or without the present invention other features and element combine it is various in the case of use.Method or flow chart that the present invention is provided It can implement in the computer program, software or firmware by all-purpose computer or computing device, wherein the computer journey Sequence, software or firmware are comprising in a computer-readable storage medium, on computer-readable storage medium in tangible mode The example of matter includes read-only storage (ROM), random access memory (RAM), register, buffer storage, semiconductor and deposited Store up magnetizing mediums, magnet-optical medium and the CD-ROM disks and digital multifunctional light of equipment, internal hard drive and moveable magnetic disc etc The optical medium of disk (DVD) etc.
For example, appropriate processor includes：General processor, application specific processor, conventional processors, data signal Processor (DSP), multi-microprocessor, the one or more microprocessors associated with DSP core, controller, microcontroller Device, application specific integrated circuit (ASIC), field programmable gate array (FPGA) circuit, any integrated circuit (IC) and/or shape State machine.
The processor associated with software can be used for realizing RF transceiver, with wireless transmitter receiver unit (WTRU), used in user equipment, terminal, base station, radio network controller or any host computer. WTRU can be used in combination with the module implemented using hardware and/or software form, for example camera, camara module, video electricity Road, speaker-phone, vibratory equipment, loudspeaker, microphone, television transceiver, Earphone with microphone, keyboard, bluetoothModule, tune Frequently (FM) radio unit, liquid crystal display (LCD) display unit, Organic Light Emitting Diode (OLED) display unit, numeral Music player, media player, video game machine module, explorer and/or any WLAN (WLAN) module.

Claims (12)

1. a kind of method for being used to perform wireless transmitter/receiver unit WTRU transmission power control TPC, this method includes：
Receive up-link license on the downlink control channels, up-link license include dominant corrective command and Modulation and coded set MCS information；
Signal based on reception, measuring route loss；
At least based on measured path loss, the dominant corrective command, the MCS information and predetermined weighting because Number, it is determined that the transmitted power level for physical uplink link channel, wherein the predetermined weighting factor have from 0 to 1 value；And
Permitted according to the up-link and carried out based on identified transmitted power level on physically Downlink channels Transmitting.
2. according to the method described in claim 1, wherein the physical uplink link channel is physical uplink link shared channels PUSCH。
3. according to the method described in claim 1, wherein the predetermined weighting factor has 0 or 1 value.
4. according to the method described in claim 1, wherein the transmitted power level of the determination is based further on emission maximum work( Rate level.
5. according to the method described in claim 1, wherein the dominant corrective command and the MCS information correspond to for institute State the parameter that the combined type open loop of physical uplink link channel and the closed loop portion of close-loop power control mechanism are associated.
6. according to the method described in claim 1, wherein measured path loss correspond to for the physical uplink chain The combined type open loop of the path channels parameter associated with the ring opening moiety of close-loop power control mechanism.
7. a kind of wireless transmitter/receiver unit WTRU, the WTRU include：
Receiver, is configured to receive up-link license on the downlink control channels, the up-link license includes Dominant corrective command and modulation and coded set MCS information；
Processor, is configured to：
Signal based on reception, measuring route loss；
At least based on measured path loss, the dominant corrective command, the MCS information and predetermined weighting because Number, it is determined that the transmitted power level for physical uplink link channel, wherein the predetermined weighting factor have from 0 to 1 value；And
Emitter, is configured to be permitted according to the up-link and is physically gone based on identified transmitted power level Launched on link channel.
8. WTRU according to claim 7, wherein the physical uplink link channel is physical uplink link shared channels PUSCH。
9. WTRU according to claim 7, wherein the predetermined weighting factor has 0 or 1 value.
10. WTRU according to claim 7, wherein the transmitted power level of the determination is based further on emission maximum work( Rate level.
11. WTRU according to claim 7, wherein the dominant corrective command and the MCS information correspond to for The combined type open loop of the physical uplink link channel parameter associated with the closed loop portion of close-loop power control mechanism.
12. WTRU according to claim 7, wherein measured path loss correspond to for the physical uplink chain The combined type open loop of the path channels parameter associated with the ring opening moiety of close-loop power control mechanism.
CN201610979452.8A 2006-10-03 2007-09-26 Combined type open/close for E UTRA interference mitigation（Based on CQI）Up-link transmission power is controlled Pending CN107105489A (en)

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