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CN102932896B - A kind of high speed uplink packet access E TFC systems of selection and device - Google Patents

A kind of high speed uplink packet access E TFC systems of selection and device Download PDF

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Publication number
CN102932896B
CN102932896B CN201110226886.8A CN201110226886A CN102932896B CN 102932896 B CN102932896 B CN 102932896B CN 201110226886 A CN201110226886 A CN 201110226886A CN 102932896 B CN102932896 B CN 102932896B
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tfc
tbs
user
modulation system
power
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CN102932896A (en
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李光远
郭定
郭定一
梅晨斐
王建
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a kind of high speed uplink packet access E TFC systems of selection and device, this method to include：According to setting suitable authorization power thresholding to determine to license to E TFC modulation system, E TFC selections are carried out in MAC layer based on the modulation system for licensing to E TFC.The device includes：Modulation system determining unit is authorized, for determining to license to E TFC modulation system according to the authorization power thresholding of setting；E TFC selecting units, for carrying out E TFC selections in MAC layer based on the modulation system for licensing to E TFC.Due to the present invention be it is determined that modulation system under, qualified maximum TBS is searched in E TFC, can on the basis of existing scheme, will carry out E TFC selection when computation complexity reduce half.

Description

A kind of high speed uplink packet access E-TFC systems of selection and device
Technical field
The present invention relates to mobile communication technology field, more particularly to a kind of high speed uplink packet access E-TFC (Enhanced-Transport Format Combination, enhanced transport format combination) system of selection and device.
Background technology
Between base station NodeB and user UE, in order to preferably meet the high speed upstream data service such as interaction multimedia Demand, the movement of TD-SCDMA (Time Division Synchronization CDMA, TD SDMA) honeycomb are logical News system introduces HSUPA (High Speed Uplink Packet Access, high speed uplink packet access) technology, to carry The transmission capacity of high uplink radio link, meets the uplink service demand of user, and wherein E-TFC selections are one in HSUPA Key technology.
E-TFC selections are the important steps in protocol stack business, and its process is after being multiplexed for logic channel, according to mandate Information selects TBS (Transport in E-TFC for MAC (Media Access Control, medium education) layer choosing Block Set, transmission block) size.In 3GPP (3rd Generation Partnership Project, third generation cooperation Partnership Program) in agreement TS25.321, only generally give E-TFC rule and implementation that selection should follow.Existing side Case is needed 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) and QPSK in user UE sides The TBS in E-TFC under (Quadrature Phase Shift Keying, QPSK) two kinds of modulation systems is time Go through one time, finally select the maximum TBS being adapted to physical resource.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of high speed uplink packet access E-TFC systems of selection and device, Under conditions of existing scheme performance is not influenceed, the computation complexity that UE sides are carried out to E-TFC selections reduces half.
The technical solution adopted by the present invention is the high speed uplink packet access E-TFC systems of selection, including：
Determined to license to E-TFC modulation system according to the authorization power thresholding of setting, based on the modulation for licensing to E-TFC Mode carries out E-TFC selections in MAC layer.
Further, it is described to be determined to license to E-TFC modulation system, specific bag according to the authorization power thresholding of setting Include：
Authorization power thresholding is determined according to the first physical resource of configuration；
If base station is less than the authorization power thresholding to the authorization power of user, E-TFC selection QPSK modulation methods are authorized Formula, otherwise authorize E-TFC selection 16QAM modulation systems.
Further, first physical resource according to configuration determines authorization power thresholding, specifically includes：
First physical resource of configuration includes：Spreading factor, HARQ (Hybrid Automatic Repeat request, Mixed automatic retransfer) bias ΔharqAnd spreading factor and gain factoreCorresponding relation；
In the spreading factor and HARQ bias Δs of settingharqUnder, believed according to transmission code rate under different modulating mode and target Make an uproar than corresponding relation, select QPSK modulation systems under transmission code rate λ1Corresponding TBS sizes, which are more than under 16QAM modulation systems, to be passed Defeated code check λ2Target signal to noise ratio maximum during corresponding TBS sizes is as target signal to noise ratio β0, eSubstitution formula (1) obtains mandate work( Rate threshold valuee, wherein αeFor gain factor corresponding with spreading factor；
βe=β0, e+αe+Δharq (1)。
Further, it is described that E-TFC selections are carried out in MAC layer based on the modulation system for licensing to E-TFC, specifically include：
Authorization power of the base station to user is read from control channel；
Under the modulation system for licensing to E-TFC, find out in TBS subsets corresponding to user occupancy time slot and awarded described in satisfaction Weigh power requirement and the maximum TBS being adapted to the second physical resource of configuration, the second physical resource of the configuration include：Institute State and license to transmission code rate scope corresponding to the modulation system that user uses, the data volume size of user terminal buffering area and user side Maximum transmission power.
Further, it is described under the modulation system for licensing to E-TFC, in TBS subsets corresponding to user occupancy time slot The maximum TBS for meeting the authorization power requirement and being adapted to the second physical resource of configuration is found out, is specifically included：
A1, it is still untreated according to sequential selection one from big to small in TBS subsets corresponding to user occupancy time slot TBS；
A2, according to transmission code rate scope and user terminal buffering area corresponding to the modulation system for licensing to user and using Data volume size judge whether the TBS eligible, if so, then performing step A3, otherwise perform step A1；
A3, the transmission code rate of the TBS is calculated, the traffic channel transmission power of user is determined according to TBS transmission code rate；
A4, judges whether the traffic channel transmission power of user is less than or equal to the authorization power and the maximum hair of user side Power is penetrated, if, it is determined that TBS corresponding to the traffic channel transmission power of the user is final result, otherwise jump procedure A1。
The present invention also provides a kind of high speed uplink packet access E-TFC selection devices, including：
Modulation system determining unit is authorized, for determining to license to E-TFC modulation according to the authorization power thresholding of setting Mode；
E-TFC selecting units, for carrying out E-TFC selections in MAC layer based on the modulation system for licensing to E-TFC.
Further, the mandate modulation system determining unit, is specifically included：
Authorization power thresholding setup module, authorization power thresholding is determined for the first physical resource according to configuration；
Modulation system determining module is authorized, for being less than the authorization power thresholding to the authorization power of user when base station When, QPSK modulation systems are selected, remaining situation selects 16QAM modulation systems.
Further, the authorization power thresholding setup module, is used for：
First physical resource of the configuration includes：Spreading factor, HARQ bias ΔsharqAnd spreading factor and gain because Sub- αeCorresponding relation；
In the spreading factor and HARQ bias Δs of settingharqUnder, believed according to transmission code rate under different modulating mode and target Make an uproar than corresponding relation, select QPSK modulation systems under transmission code rate λ1Corresponding TBS sizes, which are more than under 16QAM modulation systems, to be passed Defeated code check λ2Target signal to noise ratio maximum during corresponding TBS sizes is as target signal to noise ratio β0, eSubstitution formula (1) obtains mandate work( Rate threshold valuee, wherein αeFor gain factor corresponding with spreading factor；
βe=β0, e+αe+Δharq (1)。
Further, the E-TFC selecting units, are specifically included：
Read module, for reading authorization power of the base station to user from control channel；
Searching modul, under the modulation system for licensing to E-TFC, in TBS subsets corresponding to user occupancy time slot Find out the maximum TBS for meeting the authorization power requirement and being adapted to the second physical resource of configuration, the second of the configuration Physical resource includes：Modulation system that user uses corresponding transmission code rate scope, user terminal buffering area are licensed to described Data volume size and user side maximum transmission power.
Further, the searching modul, is specifically included：
Choose submodule, in TBS subsets corresponding to user occupancy time slot according to sequential selection one from big to small Individual still untreated TBS, call the first judging submodule；
First judging submodule, transmission code rate scope corresponding to the modulation system used for licensing to user according to And the data volume size of user terminal buffering area judges whether the TBS is eligible, if so, then calling power calculation submodule Block, otherwise call and choose submodule；
Power calculation submodule, the transmission code rate of the TBS is calculated, the business of user is determined according to TBS transmission code rate Channel emission power；
Second judging submodule, for judging whether the traffic channel transmission power of user is less than or equal to the authorization power And user side maximum transmission power, if, it is determined that TBS corresponding to the traffic channel transmission power of the user is most to terminate Fruit, otherwise call and choose submodule.
Using above-mentioned technical proposal, the present invention at least has following advantages：
High speed uplink packet access E-TFC systems of selection of the present invention and device, by setting suitable authorization power Thresholding judges to license to E-TFC modulation system, it is determined that modulation system under, search qualified maximum in E-TFC Computation complexity when carrying out E-TFC selections can be reduced half by TBS, therefore, the present invention on the basis of existing scheme.
Brief description of the drawings
Fig. 1 is first embodiment of the invention high speed uplink packet access E-TFC system of selection flow charts；
Fig. 2 be first embodiment of the invention in searched in TBS subsets corresponding to user occupancy time slot it is satisfactory most Big TBS flow chart；
Fig. 3 is second embodiment of the invention high speed uplink packet access E-TFC selection device structural representations；
Fig. 4 is that the searching modul in second embodiment of the invention high speed uplink packet access E-TFC selection devices is specifically tied Structure schematic diagram；
Fig. 5 is the relation schematic diagram of reference transmission code check and target SIR.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined purpose is taken, below in conjunction with accompanying drawing And preferred embodiment, the present invention is described in detail as after.
First embodiment of the invention, a kind of high speed uplink packet access E-TFC systems of selection, as shown in figure 1, including following Specific steps：
Step S101, authorization power thresholding is set.
Specifically, authorization power thresholding, the first physical resource of the configuration are determined according to the first physical resource of configuration Including：Spreading factor, HARQ bias ΔsharqAnd spreading factor and gain factoreCorresponding relation, determine authorization power thresholding Method it is as follows：
In the spreading factor and HARQ bias Δs of settingharqUnder, transmission code rate λ under QPSK modulation systems1Corresponding TBS is big It is small to be：λ1×(44×16×Q1-17×Q2), transmission code rate λ under 16QAM modulation systems2Corresponding TBS sizes are：λ2×(44× 16×Q1-17×Q2), wherein, Q1It is constant corresponding to modulation system that Traffic Channel uses, Q2It is the tune that control channel uses Constant corresponding to mode processed；
According to the corresponding relation of transmission code rate and target signal to noise ratio under different modulating mode, λ is selected1×(44×16×Q1- 17×Q2) ＞ λ2×(44×16×Q1-17×Q2) when target signal to noise ratio maximum as target signal to noise ratio β0, eSubstitution formula (1) Obtain authorization power threshold valuee, wherein αeFor gain factor corresponding with spreading factor；
βe=β0, e+αe+Δharq (1)
Step S102, determined to license to E-TFC modulation system according to the authorization power thresholding of setting.
Specifically, if base station is less than the authorization power thresholding to the authorization power of user, E-TFC selections QPSK is authorized Modulation system, otherwise authorize E-TFC selection 16QAM modulation systems.
Step S103, E-TFC selections are carried out in MAC layer based on the modulation system for licensing to E-TFC.
Specifically, authorization power of the base station to user is read from control channel；
Under the modulation system for licensing to E-TFC, found out in TBS subsets corresponding to user occupancy time slot described in satisfaction The maximum TBS that authorization power is required and is adapted to the second physical resource of configuration, the second physical resource of the configuration include： Transmission code rate scope, the data volume size of user terminal buffering area and user corresponding to the modulation system for licensing to user and using Side maximum transmission power.As shown in Fig. 2 it is as follows to search above-mentioned satisfactory maximum TBS processes：
A1, it is still untreated according to sequential selection one from big to small in TBS subsets corresponding to user occupancy time slot TBS；
A2, according to transmission code rate scope and user terminal buffering area corresponding to the modulation system for licensing to user and using Data volume size judge whether the TBS eligible, if so, then performing step A3, otherwise perform step A1；
A3, the transmission code rate of the TBS is calculated, the traffic channel transmission power of user is determined according to TBS transmission code rate；
A4, judges whether the traffic channel transmission power of user is less than or equal to the authorization power and the maximum hair of user side Power is penetrated, if so, it is final result that then the traffic channel transmission power of the user, which corresponds to TBS, otherwise jump procedure A1.
Second embodiment of the invention, a kind of high speed uplink packet access E-TFC selection devices, as shown in figure 3, including following Part：
1) modulation system determining unit 10 is authorized, for determining to license to E-TFC's according to the authorization power thresholding of setting Modulation system.
Specifically, modulation system determining unit 10 is authorized to include：
Authorization power thresholding setup module 11, authorization power thresholding is determined for the first physical resource according to configuration.Tool Body, the first physical resource of the configuration includes：Spreading factor, HARQ bias ΔsharqAnd spreading factor and gain factore Corresponding relation；
In the spreading factor and HARQ bias Δs of settingharqUnder, transmission code rate λ under QPSK modulation systems1Corresponding TBS is big It is small to be：λ1×(44×16×Q1-17×Q2), transmission code rate λ under 16QAM modulation systems2Corresponding TBS sizes are：λ2×(44× 16×Q1-17×Q2), wherein, Q1Constant corresponding with the modulation system that Traffic Channel uses, Q2It is the tune that control channel uses Constant corresponding to mode processed；
Authorization power thresholding setup module 11 is closed according to transmission code rate under different modulating mode is corresponding with target signal to noise ratio System, select λ1×(44×16×Q1-17×Q2) ＞ λ2×(44×16×Q1-17×Q2) when target signal to noise ratio maximum conduct Target signal to noise ratio β0, eSubstitution formula (1) obtains authorization power threshold valuee, wherein αeFor gain factor corresponding with spreading factor；
βe=β0, e+αe+Δharq (1)。
Modulation system determining module 12 is authorized, for being less than the authorization power thresholding to the authorization power of user when base station When, QPSK modulation systems are selected, remaining situation selects 16QAM modulation systems.
2) E-TFC selecting units 20, for carrying out E-TFC selections in MAC layer based on the modulation system for licensing to E-TFC.
Specifically, E-TFC selecting units 20 include：
Read module 21, for reading authorization power of the base station to user from control channel；
Searching modul 22, under the modulation system for licensing to E-TFC, in TBS subsets corresponding to user occupancy time slot In find out the maximum TBS for meeting the authorization power requirement and being adapted to the second physical resource of configuration, the of the configuration Two physical resources include：The corresponding transmission code rate scope of modulation system that user uses, user terminal buffering area are licensed to described Data volume size and user side maximum transmission power.
Further, as shown in figure 4, searching modul 22 specifically includes：
Choose submodule 221, in TBS subsets corresponding to user occupancy time slot according to sequential selection from big to small One still untreated TBS, call the first judging submodule；
First judging submodule 222, transmission code rate corresponding to the modulation system used for licensing to user according to Scope and the data volume size of user terminal buffering area judge whether the TBS is eligible, if so, then calling power meter operator Module, otherwise call and choose submodule；
Power calculation submodule 223, the transmission code rate of the TBS is calculated, the industry of user is determined according to TBS transmission code rate Business channel emission power；
Second judging submodule 224, for judging whether the traffic channel transmission power of user is less than or equal to the mandate Power and user side maximum transmission power, if so, then the traffic channel transmission power of the user corresponds to TBS most to terminate Fruit, otherwise call and choose submodule.
An application example is introduced below based on the technical scheme of first and second embodiment, this example is suitable by setting Authorization power thresholding, judge to license to E-TFC modulation system in NodeB sides.
This example specifically includes following steps：
The first step：NodeB sides set authorization power thresholding, to determine to license to E-TFC modulation system.
The present invention program is proposed by setting authorization power thresholding, judges the modulation system of transmission block, door in NodeB sides Whether reasonable limit set, and directly influences final performance.The theory for providing thresholding by taking TD-SCDMA system as an example below pushes away Lead value, it is assumed that spreading factor SF=1, HARQ bias Δharq0 is set to by high-level signaling configuration.
For the TBS that modulation system is QPSK, it is assumed that its corresponding transmission code rate is λ1；It is 16QAM for modulation system TBS, it is assumed that its corresponding transmission code rate is λ2.Due to the definition of the Traffic Channel E-DCH of transport layer transmission code rate (λ e) It is as follows：
Wherein, SeRepresent the size of the E-TFC of selection transmission block, ReIt is that the physical channel that Traffic Channel E-DCH is handled reflects Physical channel bit number after penetrating.
Re=(44/SF) × 16 × Q1-17×Q2 (3)
Wherein, 44 symbolic number occupied by Traffic Channel E-PUCH, SF are spreading factor, and 16 be code channel number, Q1For industry Numerical value corresponding to the modulation system that business channel uses is (for 4), 17 be that 1 control channel E-UCCH is accounted for when being 2,16QAM during QPSK Symbolic number, Q2Numerical value corresponding to the modulation system used for control channel (control channel only can only use QPSK modulation systems, 2) its corresponding numerical value is.
Under two kinds of modulation systems TBS sizes corresponding to different transmission code rates according to the definition of transmission code rate be formula (2), (3) can draw：
1) TBS sizes are corresponding to modulation system QPSK：λ1×(44×16×2-34)
2) TBS sizes are corresponding to modulation system 16QAM：λ2×(44×16×4-34)
In existing scheme, when two kinds of modulation system selections meet authorization power requirement of the base station to user, TBS is selected most Big conduct TBS to be selected, that is to say, that work as λ1× (44 × 16 × 2-34) ＞ λ2During × (44 × 16 × 4-34), i.e. λ1＞ 2.02 λ2When, select QPSK modulation systems.
Under different modulating mode corresponding to different target SIR (Signal-to-Interference Ratio, signal to noise ratio) Reference transmission code check is as shown in table 1.
The reference transmission code check of table 1 and corresponding target SIR
The reference transmission code check and target SIR relation schematic diagram drawn according to table 1 are as shown in figure 5, where the dotted line signifies that Be under 16QAM modulation systems under each target SIR corresponding to 2.02 times of transmission code rate lines of demarcation, as seen from Figure 5, work as target When SIR is less than -5dB, no matter why target SIR is worth, and under same target SIR, transmission code rate corresponding to QPSK modulation systems is equal To correspond to more than 2.02 times of transmission code rate under 16QAM modulation systems, i.e. λ1The λ of ＞ 2.022, now select QPSK modulation systems.
The spreading factor SF of table 2 and gain factoreCorresponding relation
SF αe(dB)
1 12
2 9
4 6
8 3
16 0
SF=1 is above set, the corresponding relation by spreading factor and gain factor is that table 2 can obtain αe=12, HARQ are biased Δharq0, β is set to by high-level signaling configuration0, eValue is target SIR, from derivation above, when target SIR is less than -5dB When, no matter why target SIR is worth, and under same target SIR, should select QPSK modulation systems, therefore -5dB is QPSK modulation systems Corresponding transmission code rate is the maximum of target SIR when corresponding to more than 2.02 times of transmission code rate under 16QAM modulation systems, also may be used To be understood as being, TBS corresponding to modulation system QPSK is more than the maximum of target SIR during TBS corresponding to modulation system 16QAM. So by formula (1) βe=β0, e+αe+ΔharqAnd derive and understand, when authorization power is less than 7dB, select QPSK modulation.Therefore, The authorization power thresholding P that NodeB sides are setThrIt should be 7dB.
Second step：The authorization power thresholding P that NodeB lateral roots provide according to the first stepThrJudgement licenses to E-TFC modulation methods Formula.
Specifically, judge authorization power Ps of the NodeB to UEgrantWhether P is more thanThrIf authorization power PgrantMore than PThr, Then E-TFC is authorized to use qam mode, if authorization power PgrantLess than PThr, then E-TFC is authorized to use QPSK modulation systems.
3rd step：According to the modulation system authorized in second step, UE ends carry out E-TFC selections in MAC layer, specifically included：
S201：UE is read from physical layer control channel AGCH (Access Grant Channel, it is allowed to access channel) NodeB indexes PRRI to UE authorization power；
S202：UE indexes the modulation system of PRRI and mandate from when TBS tables selection current UE takes according to authorization power TBS subsets corresponding to gap；
S203：Under the modulation system of the mandate, the transmission of all TBS in TBS subsets is calculated using formula (2), (3) Code check λe；
S204：Not yet handled according to sequential selection one from big to small in TBS subsets corresponding to user occupancy time slot TBS.
S205：Judge the transmission code rate of the TBS whether in transmission corresponding to the modulation system for licensing to user and using In range of code rates, under the modulation system for licensing to user and using, the reference transmission code check λ of high-level signaling notice maximum Minimum value is expressed as λmaxAnd λminIf transmission code rate λ corresponding to a certain TBSeMeet λmin≤λe≤λmax, then this TBS meet biography The requirement of defeated code check, step S206 is performed, if being unsatisfactory for transmission code rate requirement, jump procedure S204 is in the TBS subsets Select next TBS.
S206：By compared with TBS and UE buffering area the BUFFER data volume for meeting transmission code rate requirement, select to delay less than UE The TBS of area BUFFER data volume is rushed, otherwise jump procedure S204 selects next TBS in the TBS subsets.
S207：The transmission code rate λ according to corresponding to TBSeIt is worth the reference power biasing β of interpolation calculation TBS needse, Jin Erqiu Obtain actual emission powers of the UE in Traffic Channel.
The actual emission power for the Traffic Channel that UE ends are set calculates according to equation below：
PE-PUCH=Pe-base+L+βe (4)
Wherein, PE-PUCHIt is the actual emission power of UE Traffic Channels；
Pe-baseIt is the closed loop amount that UE and NodeB is safeguarded；
L is path loss, is obtained according to the measurement to beacon physical channel.
βeBe corresponding selected E-TFC transport block sizes, the Traffic Channel E-PUCH physical resources of distribution, modulation system and The reference power biasing of HARQ biasings, can there is above-mentioned formula (1) βe=β0, e+αe+ΔharqCalculate βe, wherein, β0, e It can be obtained by formula below (5)：
β0, e=SIR (5)
Wherein SIR can be to be obtained in table 2 by reference transmission code check system corresponding with target SIR.
S208：Judge whether the UE actual emission powers under current transmission code check are less than or equal to mandate work(of the Node B to UE Rate, if so, being then used as TBS to be selected, otherwise jump procedure S204 selects next TBS in the TBS subsets.
S209：Judge whether TBS to be selected corresponding UE actual emission powers are less than or equal to UE maximum transmission power, if It is then to have chosen qualified maximum TBS, performs step S210, if can not meet the condition, jump procedure S204 exists Next TBS is selected in the TBS subsets.
S210：Qualified maximum TBS index is issued into Node B by Traffic Channel.
Certainly, the present invention can also judge to license to E-TFC modulation system i.e. transmission block TBS modulation methods in UE sides Formula, i.e., suitable authorization power thresholding P is set in UE sidesThr, then NodeB is read to the authorization power to UE from control channel Pgrant, by authorization power PgrantWith authorization power thresholding PThrIt is compared the authorized modulation system to E-TFC.
By the explanation of embodiment, should can to the present invention for reach technological means that predetermined purpose is taken and Effect is able to more go deep into and specific understanding, but appended diagram is only to provide reference and purposes of discussion, not for this Invention is any limitation as.

Claims (6)

  1. A kind of 1. high speed uplink packet access enhanced transport format combination E-TFC systems of selection, it is characterised in that including：
    Determined to license to E-TFC modulation system according to the authorization power thresholding of setting, based on the modulation system for licensing to E-TFC E-TFC selections are carried out in media access control MAC layer；
    It is described to be determined to license to E-TFC modulation system according to the authorization power thresholding of setting, specifically include：
    If base station is less than the authorization power thresholding to the authorization power of user, E-TFC selection QPSKs are authorized QPSK modulation systems, otherwise authorize E-TFC selection quadrature amplitude modulation 16QAM modulation systems；
    The determination mode of the authorization power thresholding includes：
    Authorization power thresholding is determined according to the first physical resource of configuration；First physical resource of configuration includes：Spreading factor, mix Close autonomous retransmission HARQ bias ΔsharqAnd spreading factor and gain factoreCorresponding relation；
    It is described that E-TFC selections are carried out in MAC layer based on the modulation system for licensing to E-TFC, specifically include：
    Authorization power of the base station to user is read from control channel；
    Under the modulation system for licensing to E-TFC, found out in TBS subsets corresponding to user occupancy time slot and meet the mandate work( The maximum TBS that rate is required and is adapted to the second physical resource of configuration, the second physical resource of the configuration include：It is described to award It is maximum to weigh transmission code rate scope corresponding to the modulation system used to user, the data volume size of user terminal buffering area and user side Transmission power.
  2. 2. high speed uplink packet access E-TFC systems of selection according to claim 1, it is characterised in that the basis is matched somebody with somebody The first physical resource put determines authorization power thresholding, specifically includes：
    In the spreading factor and HARQ bias Δs of settingharqUnder, according to transmission code rate under different modulating mode and target signal to noise ratio Corresponding relation, select transmission code rate λ under QPSK modulation systems1Corresponding transmission block TBS sizes, which are more than under 16QAM modulation systems, to be passed Defeated code check λ2Target signal to noise ratio maximum during corresponding TBS sizes is as target signal to noise ratio β0,eSubstitution formula (1) obtains mandate work( Rate threshold valuee, wherein αeFor gain factor corresponding with spreading factor；
    βe=β0,e+αe+Δharq (1)。
  3. 3. high speed uplink packet access E-TFC systems of selection according to claim 1, it is characterised in that described to authorize To under E-TFC modulation system, found out in TBS subsets corresponding to user occupancy time slot meet the authorization power requirement and The maximum TBS being adapted to the second physical resource of configuration, is specifically included：
    A1, according to the still untreated TBS of sequential selection one from big to small in TBS subsets corresponding to user occupancy time slot；
    A2, according to the number of transmission code rate scope and user terminal buffering area corresponding to the modulation system for licensing to user and using Judge whether the TBS is eligible according to amount size, if so, then performing step A3, otherwise perform step A1；
    A3, the transmission code rate of the TBS is calculated, the traffic channel transmission power of user is determined according to TBS transmission code rate；
    A4, judges whether the traffic channel transmission power of user is less than or equal to the authorization power and user side emission maximum work( Rate, if, it is determined that TBS corresponding to the traffic channel transmission power of the user is final result, otherwise jump procedure A1.
  4. A kind of 4. high speed uplink packet access E-TFC selection devices, it is characterised in that including：
    Modulation system determining unit is authorized, for determining to license to E-TFC modulation system according to the authorization power thresholding of setting；
    E-TFC selecting units, for carrying out E-TFC selections in MAC layer based on the modulation system for licensing to E-TFC；
    The mandate modulation system determining unit, is specifically included：
    Modulation system determining module is authorized, for when base station is less than the authorization power thresholding to the authorization power of user, selecting QPSK modulation systems are selected, remaining situation selects 16QAM modulation systems；
    The mandate modulation system determining unit, in addition to：
    Authorization power thresholding setup module, authorization power thresholding is determined for the first physical resource according to configuration；The configuration The first physical resource include：Spreading factor, HARQ bias ΔsharqAnd spreading factor and gain factoreCorresponding relation；
    The E-TFC selecting units, are specifically included：
    Read module, for reading authorization power of the base station to user from control channel；
    Searching modul, under the modulation system for licensing to E-TFC, being found out in TBS subsets corresponding to user occupancy time slot Meet the authorization power requirement and the maximum TBS being adapted to the second physical resource of configuration, the second physics of the configuration Resource includes：The corresponding transmission code rate scope of modulation system that user uses, the data of user terminal buffering area are licensed to described Measure size and user side maximum transmission power.
  5. 5. high speed uplink packet access E-TFC selection devices according to claim 4, it is characterised in that the mandate work( Rate thresholding setup module, is used for：
    In the spreading factor and HARQ bias Δs of settingharqUnder, according to transmission code rate under different modulating mode and target signal to noise ratio Corresponding relation, select transmission code rate λ under QPSK modulation systems1Corresponding TBS sizes are more than transmission code rate under 16QAM modulation systems λ2Target signal to noise ratio maximum during corresponding TBS sizes is as target signal to noise ratio β0,eSubstitution formula (1) obtains authorization power thresholding Value βe, wherein αeFor gain factor corresponding with spreading factor；
    βe=β0,e+αe+Δharq (1)。
  6. 6. high speed uplink packet access E-TFC selection devices according to claim 4, it is characterised in that the lookup mould Block, specifically include：
    Choose submodule, in TBS subsets corresponding to user occupancy time slot according to sequential selection one from big to small still Untreated TBS, call the first judging submodule；
    First judging submodule, for licensed to according to transmission code rate scope corresponding to the modulation system that user uses and The data volume size of user terminal buffering area judges whether the TBS is eligible, if so, power calculation submodule is then called, it is no Then call and choose submodule；
    Power calculation submodule, the transmission code rate of the TBS is calculated, the Traffic Channel of user is determined according to TBS transmission code rate Transmission power；
    Second judging submodule, for judge user traffic channel transmission power whether be less than or equal to the authorization power and User side maximum transmission power, if, it is determined that TBS corresponding to the traffic channel transmission power of the user is final result, Otherwise call and choose submodule.
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