CN1855752A - Method for obtaining gain factor of special physical data channel for upload enhance - Google Patents

Abstract

The method comprises: the power bias values and actual transmission speeds corresponding to bit-streams in different formats are obtained using communication link simulation; when use end (UE) initiates a service request to serving radio network controller (SRNC), in term of the type of service request, determines the combined mode, transmission speed and maximum data retransmission times of the request in order to get the transmission format and corresponding power bias value available for UE and matching the result of link simulation; SRNC configures said available transmission format and a reference format for UE; in term of said available transmission format, UE determines a present transmission format, and calculates a gain factor of the present transmission format comparing with the reference transmission format, and uses the power bias value corresponding to the present transmission format to modify said gain factor.

Description

A kind of method for obtaining gain factor of special physical data channel for upload enhance

Technical field

The present invention relates to WCDMA system uplink transfer of data enhancement techniques HSUPA (High SpeedUplink Packet Data Access, high speed uplink bag data insert), especially refer to its up enhancing Dedicated Physical Data Channel (Enhanced-Dedicated Physical Data Channel, E-DPDCH) method for obtaining gain factor.

Background technology

3GPP organizes to set up WCDMA system uplink transfer of data enhancement techniques HSUPA, this up-high speed data access technology adopts compound retransmission technique (Hybrid Automatic Repeat Request, HARQ), the short frame technique of base station (NodeB) fast dispatch technology and up 2ms, improved the throughput of uplink user data greatly, eat dishes without rice or wine peak rate up to 5.76Mbps, and also improved the system uplink capacity than significantly.

The HSUPA technology is in the up dedicated channel that increases by 2 enhancings, and one is the Dedicated Control Channel E-DPCCH that strengthens, and another is the data channel E-DPDCH that strengthens.E-DPCCH is used to transmit the control information of associated data channel E-DPDCH, comprises re-transmission sequence number RSN and transformat indication information (E-TFCI).

The E-DPDCH channel is used for transmit ascending data, and each Transmission Time Interval (Transmission TimeInterval, upload data by one or more E-DPDCHs channel and give NodeB by E-DCH TTI) (enhancing dedicated transmission channel) transmission data block.The Frame length of E-DPDCH can be 10ms or 2ms, and multiple transformat is arranged.The input data are MAC-e PDU (media access control protocol data unit), and the TTI time interval of each HSUPA can be transmitted 1 MAC-e PDU data block.

The inner-loop power control of E-DPCCH and E-DPDCH channel adopts the different capacity biasing to revise based on up Dedicated Control Channel DPCCH according to different transpost formats.The correction of power bias is embodied in power control gain factor β _Ec, β _{De, i}Therefore, β correctly is set _Ec, β _{Ed, i}The QoS and the systematic function that are related to these two channel demodulations.

In the 3GPP agreement 25.214, the E-DPCCH power control gain factor β of definition _EcComputing formula is:

${\mathrm{\β}}_{\mathrm{ec}}={\mathrm{\β}}_c\·{10}^{\left(\frac{{\mathrm{\Δ}}_{E-\mathrm{DPCCH}}}{20}\right)}$

β wherein _cBe the power ride gain factor of up Dedicated Control Channel DPCCH, Δ _E-DPDCHBe the power bias value of physical channel E-DPCCH, by radio network controller (RNC) informing user terminal (UE) with respect to DPCCH.The transformat of each 2ms subframe of E-DPCCH is fixed, and when the TTI that follows the E-DPDCH channel was respectively 2ms or 10ms, the 10ms frame length can bring and retransmit corresponding power bias value Δ 5 times of E-DPCCH _E-DPCCHCan be less than the power bias value of 2ms frame length.

E-DPDCH power control gain factor β _EdMay get a different value to each transformat combination (E-TFC).The HSUPA data transmission format may change by radio frames or subframe, so E-DPDCH power control gain factor β _EdAlso needing transformat according to correspondence to calculate frame by frame with power bias controls.The E-DPDCH power control gain factor β of different transpost formats correspondence _EdCalculating is based on the transformat of a reference, and wireless network needs to determine more than one reference transmission form E-TFCI at least when the E-TFCI TFS Transport Format Set of configuration HSUPA _Ref, wherein the transformat of speed minimum need be set to the reference transmission form.The power control gain factor β of reference transmission form _{Ed_ref}Be calculated as follows:

${\mathrm{\β}}_{\mathrm{ed}\_\mathrm{ref}}={\mathrm{\β}}_c\·{10}^{\left(\frac{{\mathrm{\Δ}}_{E-\mathrm{DPDCH}}}{20}\right)}$

β wherein _cBe the power ride gain factor of up Dedicated Control Channel DPCCH, Δ _E-DPCCHBe that physical channel E-DPCCH notifies UE with respect to the power bias value of DPCCH by RNC under the reference transmission form.Network is at configuration reference transmission form power bias Δ _E-DPCCHThe time, can determine according to certain qos requirement, such as according to simulation performance, choose the power bias that once transmits with regard under the accord with Q oS requirement situation.

The transformat that UE allows according to the NodeB fast dispatch is by the power control gain factor β based on the reference transmission form _{Ed_ref}Calculate the power ride gain factor-beta of corresponding transformat j _{Ed, j}In order to improve different transpost formats gain factor β _EdAccuracy, possible wireless network can dispose a plurality of reference transmission forms.Suppose to have M, transformat is respectively E-TFCI _{Ref, 1}, E-TFCI _{Ref, 2}..., E-TFCI _{Ref, M}, the pass between each transformat is E-TFCI _{Ref, 1}＜E-TFCI _{Ref, 2}＜...＜E-TFCI _{Ref, M}Suppose that the transformat that current UE is chosen is E-TFCI _j, at first need to choose one and transformat E-TFCI _jImmediate reference transmission form.If E-TFCI _j〉=E-TFCI _{Ref, M}Then the reference transmission form is E-TFCI _{Ref, M}If E-TFCI _{Ref, l}≤ E-TFCI _j＜E-TFCI _{Ref, M}, then choose wherein near E-TFCI _jTransformat, the coupling by transformat can obtain reference transmission form E-TFCI _{Ref, m}, have E-TFCI _{Ref, m}≤ E-TFCI _j＜E-TFCI _{Ref, m+1}Suppose corresponding current transformat E-TFCI _jThe reference transmission form be E-TFCI _{Ref, m}, reference transmission form E-TFCI _{Ref, m}Gain factor be β _{Ed_ref, m}, transformat E-TFCI then _jGain factor β _{Ed, j}For:

${\mathrm{\β}}_{\mathrm{ed},j}={\mathrm{\β}}_{\mathrm{ed}\_\mathrm{ref},m}\sqrt{\frac{L_{e\_\mathrm{ref},m}}{L_{e,j}}}\sqrt{\frac{K_{e,j}}{K_{e\_\mathrm{ref},m}}}$

L wherein _{E_ref, m}Expression reference transmission form E-TFCI _{Ref, m}The E-DPDCHs channel number of using, K _{E_ref, m}Expression reference transmission form E-TFCI _{Ref, m}Data b its number; L _{E, j}Expression current TTI transformat E-TFCI _jThe E-DPDCHs channel number of using, K _{E, j}Expression current TTI transformat E-TFCI _jData b its number.

K _{E_ref, m}Be calculated as K _{Ref, m}=N _{E_ref, m}* RM _{Ref, m}, N wherein _{E_ref, m}Be reference transmission form E-TFCI _{Ref, m}The bits number of a MAC-e PDU data block of definition behind the turbo coding, RM _{E_ref, m}Be reference transmission form E-TFCI _{Ref, m}The parameters of rate matching of definition.K _{E, j}Be calculated as K _{E, j}=N _{E, j}* RM _j, N wherein _{E, j}Be current TTI transformat E-TFCI _jThe bits number of a MAC-e PDU data block of definition behind the turbo coding, RM _{E, j}Be current TTI transformat E-TFCI _jThe parameters of rate matching of definition.If having used spreading factor in the transformat is 2 E-DPDCH, then spreading factor is equaled the channel number that 2 number of channel equivalence equals 4 for suitable 2 spreading factors, and calculated gains factor-beta according to the method described above _{Ed, j}, for calculating the β that obtains _{Ed, j}Conversion need be modified to  * β when equaling 2 E-DPDCH channel gain factors for spreading factor _{Ed, j}

The shortcoming of prior art is as follows:

This method does not consider that HSUPA generates the characteristics of each TTI data block MAC-e PDU, in HSUPA, allow a plurality of MAC-d flow data flow multiplexings in same MAC-e PDU, the QoS of each MAC-d flow data flow can be provided with respectively, such as transmission quality, maximum retransmission etc.The MAC-d flow data flow of these variantization requirements is at the gain factor β of Computational Physics channel E-DPDCHs _{Ed, j}The time, also have different power demands.The present way of agreement is: by to different MAC-dflow data flow configuration constant power biases, and the up E-DPDCH gain factor of UE under the certain transformat of power bias value correction useless.Yet, be the power bias value that can't determine under different number of retransmissions merely from each MAC-d flow data flow, since the transformat that the certain power bias should corresponding certain TTI, certain number of retransmissions.Same transformat, different number of retransmissions requirements, inevitable power bias value difference; Identical number of retransmissions, different transformats, its power bias value are also different, and agreement is not considered transformat at present, and 1 MAC-d flow only is provided with 1 power bias value, and it is unreasonable just to seem under different transpost formats/number of retransmissions.Such as, suppose that the gain factor correspondence of reference transmission form is once transmitted the performance requirement that just can satisfy certain Block Error Rate (BLER), then the current transformat E-TFCI that calculates according to the method described above _jGain factor β _{Ed, j}Also can just once transmit and to satisfy performance requirement.If in the MAC-d PDU data block of current transformat correspondence, the MAC-d flow data flow of transmission allows maximum retransmit 4 times, then clearly each gain factor β ' that transmits _{Ed, j}Should just require correct gain factor β much smaller than once transmitting _{Ed, j}Transmit 1/4 power in theory, after 4 transmission, received power can reach the similar effect of a through-put power at every turn.

And do not introduce the MAC-dflow power bias requirement of differentiation during the aforementioned calculation HSUPA ascending power gain controlling factor, promptly under the identical traffic form, MAC-e PDU data block and the little MAC-e PDU data block of number of retransmissions that number of retransmissions is many, the E-DPDCH channel gain factors of calculating is all identical, make and allow the big MAC-e PDU data block of number of retransmissions to raise uplink transmission power, reduced the number of times that allows re-transmission, do not make full use of compound self adaptation and retransmit the performance gain that HARQ brings, make the system uplink capacity to reduce.

Summary of the invention

The invention provides a kind of special physical data channel for upload enhance (E-DPDCH) method for obtaining gain factor, in order to solve exist in the prior art because the power bias value of gain factor correction is not considered the transformat behind the data flow multiplexing and the maximum retransmission of permission, make that the gain factor that calculates is inaccurate, thereby raised the rising transmitting power, the problem that power system capacity is reduced.

The inventive method comprises: pairing power bias value of different number of retransmissions and the actual transfer rate of obtaining data flow under the different transpost formats by link simulation, when user terminal (UE) when service wireless network controller (SRNC) is initiated service request, carry out the following step:

A, SRNC determine the compound mode of each professional data flow time division multiplexing transmission in a transmission cycle, transmission rate and the data flow maximum retransmission after the combination according to the service request type of UE; And, obtain UE available transmission formats and corresponding power bias value according to described transmission rate and data flow maximum retransmission and link simulation result coupling;

B, SRNC dispose described available transmission formats and the reference transmission form is given UE;

C, UE determine current transformat according to described available transmission formats;

D, UE calculate the relative gain factor of current transformat relative reference transformat, and use the power bias value of current transformat correspondence that this relative gain factor is revised, and obtain the gain factor of special physical data channel for upload enhance.

Describedly obtain the pairing power bias value of different number of retransmissions of data flow under the different transpost formats, comprising by link simulation:

Counting data flow according to simulated channel is not having to retransmit the Block Error Rate under the different signal to noise ratios when being N (N is a positive integer) with number of retransmissions, obtains data flow at the signal to noise ratio-Block Error Rate corresponding relation that does not have under re-transmission and the different number of retransmissions;

According to selected Block Error Rate, calculate the number of retransmissions N signal to noise ratio difference under the not re-transmission situation relatively by described corresponding relation, be the power bias value of data flow under this number of retransmissions.

Described corresponding relation is not having re-transmission to describe with the one group of signal to noise ratio-Block Error Rate relation curve under the different number of retransmissions by data flow.

Describedly obtain the pairing actual transfer rate of different number of retransmissions of data flow under the different transpost formats, comprising by link simulation:

Send data block according to the transformat determined data rate;

According to the signal to noise ratio of different number of retransmissions under selected Block Error Rate of data flow, determine pairing transmitting power under the different number of retransmissions;

Count the correct data block number that receives in a period of time by simulated channel, obtain described actual transfer rate.

The combination of data flow described in steps A mode is: will allow the identical set of streams of maximum retransmission to lump together.

The maximum retransmission of data flow described in the steps A is in the data flow combination mode of this transmission cycle, and each data flow allows the minimum value of maximum retransmission.

It is one or more in the described available transmission formats that SRNC described in the step B disposes reference transmission form to UE, and comprises the transformat of speed minimum in the described available transmission formats at least.

Select one and the immediate reference transmission form calculating of the current transformat relative gain factor among the described step D.

Also comprise among the described step C: UE selects an identical or close transformat as current transformat in described available transmission formats according to the permission transformat that the base station issues.

Use the concrete computing formula of the described relative gain factor of power bias value correction of current transformat correspondence to be described in the step D:

${\mathrm{\β}}_{\mathrm{ed},j}={\mathrm{\β}}_{\mathrm{ed}\_\mathrm{ref},m}\×\sqrt{\frac{L_{e\_\mathrm{ref},m}}{L_{e,j}}}\sqrt{\frac{K_{e,j}}{K_{e\_\mathrm{ref},m}}}\×{10}^{\frac{{\mathrm{\Δ}}_{\mathrm{TFC},\mathrm{HARQ}}}{20}}$

In the formula: β _{Ed, j}Be revised gain factor; β _{Ed_ref, m}Gain factor for the reference transmission form; L _{E_ref, m}The enhancing Dedicated Physical Data Channel number that expression reference transmission form uses; L _{E, j}Represent the enhancing Dedicated Physical Data Channel number that current transformat uses; K _{E, j}The data bit number of representing current transformat; K _{E_ref, m}The data bit number of expression reference transmission form; Δ _{TFC, HARQ}Power bias value for current transformat correspondence.

Beneficial effect of the present invention is as follows:

The present invention is based on each MAC-d flows data flow under the situation of multiplexed combinations transmission, take all factors into consideration the influence that the service quality QoS difference between each MAC-d flow data flow is brought maximum retransmission, up E-DPDCH channel emission power gain factor is revised, for the transformat that allows repeatedly to retransmit MAC-dflow data flow correspondence, can reduce the transmitting power of UE, minimizing is raised upstream noise, make full use of compound self adaptation and retransmit the performance gain that HARQ brings, improve the up-link capacity.

Description of drawings

Fig. 1 is a HSUPA user link emulation schematic diagram;

Signal to noise ratio-Block Error Rate relation curve coordinate diagram that Fig. 2 obtains for link simulation of the present invention;

Signal to noise ratio-actual data rate relation curve coordinate diagram that Fig. 3 obtains for the invention link simulation;

Fig. 4 is the inventive method flow chart.

Embodiment

Referring to Fig. 1,, comprise the steps: for the inventive method flow chart

Step S11, obtain the pairing power bias value of different number of retransmissions and the actual transfer rate of data flow under the different transpost formats by link simulation.Specifically comprise:

Set up the emulation link model of HSUPA, the emission of simulation HSUPA user uplink signal, signal arrives the NodeB reception antenna through the spatial transmission channel, as shown in Figure 2, antenna opening signal S _Tx(τ, t) received signal of arrival NodeB antenna opening is S through spatial transmission channel h _RX, the path loss of experience spatial transmission, large scale decline (shadow fading), small scale decline (rapid fading).Link simulation is only considered rapid fading, and the propagation characteristic model of rapid fading is described in 3GPP agreement 25.943, and the rapid fading propagation characteristic channel that comprises N bar multipath is $h$ $\left(\mathrm{\τ}\right)=\underset{i}{\overset{N}{\mathrm{\Σ}}}{a}_i\mathrm{\δ}\left({\mathrm{\τ}}_i\right),$ A wherein _i=a _i(τ) * exp[j φ _i(τ)], the amplitude and the phase change characteristic of decision multipath, δ (τ _i) decision multidiameter delay characteristic.For the propagation characteristic a that is not line of sight _i, the whose amplitude obeys rayleigh distributed, that is: $a_i\left(\mathrm{\τ}\right)=\frac{a_i\left(\mathrm{\τ}\right)}{{\mathrm{\σ}}^2}\exp [-\frac{a_i{\left(\mathrm{\τ}\right)}^2}{2{\mathrm{\σ}}^2}],$ Phase _i(τ) in 0～2 π interval, obey evenly distribution $f\left({\mathrm{\φ}}_i\left(\mathrm{\τ}\right)\right)=\frac{1}{2\mathrm{\π}},$ The average fading period and the Doppler frequency shift of Rayleigh fading are inversely proportional to, S (f) ∝ 1/ (1-(f/f _D) ²) ^0.5, f wherein _D=v/ λ is a maximum doppler frequency, and v is a translational speed, and λ is a carrier wavelength.For line of sight, there is not decline on the amplitude, but can be because Doppler frequency shift produce phase overturn, the characteristic of channel can be used $\exp \left[j{\mathrm{\φ}}_i\left(\mathrm{\τ}\right)\right]=\exp [j\×\frac{2\mathrm{\π}}{f_D\×\cos \mathrm{\α}}\×\mathrm{\τ}]$ Describe, α is the angle between the UE direction of motion and the direct-view footpath direction.

Received signal S _RXPass through Multipath searching, the despreading descrambling, frequency deviation correction, channel estimating, Rake receives, processing such as decoding are implemented in the demodulation of NodeB, and demodulation is correct, then feed back UE and correctly receive indication ACK, otherwise the incorrect indication NACK that receives of feedback, the correlation demodulation method is a prior art, is not described in detail at this.

By above-mentioned emulation link, the Block Error Rate (BLER) of statistics under different signal to noise ratios (EbN0, the really signal to noise ratio of the data source information bit power relative noise of transmission of making a comment or criticism) and permission maximum retransmission is under the identical number of retransmissions, EbN0 is big more, and the BLER Block Error Rate can be more little.Obtain transformat TFC _iDo not have to retransmit and different number of retransmissions under the corresponding relation (respective value that several are discrete) of BLER and EbN0, obtain data flow at the signal to noise ratio-Block Error Rate relation curve that does not have under re-transmission and the different number of retransmissions, as shown in Figure 3 by described several centrifugal pumps.

Referring to Fig. 3, be criterion (this requirement can suitably improve or reduce, and can influence actual transfer rate) with block error rate BLER=1%, can determine at identical traffic form TFC _iDown, retransmit 1 time 2 relative power bias value Δ 1, Δ 2 and Δs 3 that do not have re-transmission with 3 times.The EbN0 that does not have re-transmission in addition according to E-DPDCH ₀The EbN0 power bias value of up relatively Dedicated Control Channel DPCCH under the bit error rate of BER=5% obtains E-DPDCH at transformat TFC _iThe power bias value Δ of following relative DPCCH _E-DPDCHThe EbN0 value of up Dedicated Control Channel DPCCH under the BER=5% bit error rate can be obtained by similar link simulation.

Then according to transformat TFC _iEbN0 under different number of retransmissions _i,, determine the transmitted power of upstream data and according to transformat TFC according to identical emulation link _iDetermined data rate sends data block, and statistics NodeB is the correct data block number that receives in a period of time, divided by the duration of this section period, obtains transformat TFC _iActual transfer rate under different number of retransmissions, thus the relation curve of different number of retransmissions EbN0 and actual transfer rate obtained, as shown in Figure 4.

According to Fig. 4, can determine at identical traffic form TFC _iDown, do not retransmit and retransmit 1 time, 2 times, 3 times actual transfer rate R ₀, R ₁, R ₂, R ₃

In sum,, then can obtain power bias value and the actual transfer rate of each transformat under different number of retransmissions respectively if K transformat arranged, shown in following table one:

	Maximum retransmission
					Transformat	0	1	2	3
TFC 1	0，R 1，0	Δ 1，1，R 1，1	Δ 1，2，R 1，2	Δ 1，3，R 1，3
					TFC 2	0，R 2，0	Δ 2，1，R 2，1	Δ 2，2，R 2，2	Δ 2，3，R 2，3
...
					TFC K	0，R K，0	Δ K，1，R K，1	Δ K，2，R K，2	Δ K，3，R K，3

Δ in the table _{I, j}The expression transformat is TFC _i, when number of retransmissions was j, same relatively transformat number of retransmissions was 0 o'clock a power bias value, R _{I, j}The expression transformat is TFC _i, the actual transfer rate when number of retransmissions is j.

Step S12, SRNC determine compound mode, transmission rate and the data flow maximum retransmission of each professional data flow time division multiplexing transmission in a transmission cycle according to the service request type of UE.Specifically comprise:

When UE initiates service request, by up signaling service requesting information is informed core net, core net reinforms SRNC.SRNC according to the type of service of indicating in the UE service requesting information (as speech business, upload data service, game service, video traffic etc.), determine the number of MAC-d flow data flow, and determine the maximum retransmission of permission according to the delay requirement of each MAC-d flow data flow, the general value of scope is 0,1,2,3.The traffic performance decision that the time delay of MAC-d flow data flow is comprised by oneself, such as the uploading pictures data, time delay is very big also out of question, can select to allow maximum retransmission 3, and real-time speech business, general selection can not retransmit.

SRNC determines each MAC-dflow data flow and other MAC-d flow data flow combination transmission manner and the transmission rate that needs according to MAC-d flow data flow bearer service and number of retransmissions.For time delay can be bigger business, such as data upload, multiple transmission rate can be arranged, channel condition can be selected pass well more, channel condition is bad can select few biography; For the little business of delay requirement, transmission rate requires more stable relatively.Based on the little MAC-d flow data flow of delay requirement, determine each MAC-d flow data flow can time division multiplexing in a transmission cycle compound mode of transmission, and requiring the speed of transmission according to each MAC-d flow data flow, the transmission rate that needs after the combination is obtained in summation by adding up.Because some MAC-d flow data flow allows multiple transmission rate, therefore the transmission rate after each MAC-dflow data flow and the combination of other MAC-d flows data flow also allows multiple, thereby can tackle the data that pass when channel condition is good more, pass the principle of data during bad channel conditions less.The multiplexing principle of MAC-dflows data flow combination is the identical MAC-d flow set of streams of permission maximum retransmission to be lumped together as far as possible, and each MAC-d flow data flow all has the multiplex mode of transmission combination separately respectively with other MAC-d flow data flow.

Step S13, according to described transmission rate and data flow maximum retransmission and link simulation result coupling, obtain UE available transmission formats and corresponding power bias value.Specifically comprise:

After determining the transmission rate of each MAC-d flow data flow and other MAC-d flows data flow transmission compound modes and requirement, table one in the inquiry, the transmission rate that each MAC-d flow data flow and other MAC-dflows data flow transmission combination back require is exactly the actual transfer rate in the table one, transmission quality in order to ensure each MAC-d flow data flow, select to allow the maximum retransmission of the value of maximum retransmission minimum in the MAC-d flows data flow combination mode as question blank, according to actual transfer rate and this maximum retransmission, can determine transformat and the corresponding power bias set { TFC that UE can select for use by table one _i, Δ _{I, j}.The principle of query transmission form is under the number of retransmissions that maximum allows, the transformat of actual transfer rate in the most approaching table of transmission rate of the requirement after selection MAC-d flow data flow and the combination of other MAC-d flows data flow transmission.Such as: if the maximum transmission times that certain MAC-d flow data flow and other MAC-d flows data flow transmission compound modes allow is 2, the transmission rate of requirement approaches R _2,2, then the UE available transmission formats is selected TFC ₂, power bias value is a Δ _2,2

Step S14, SRNC dispose described available transmission formats and the reference transmission form is given UE.Specifically comprise:

SRNC disposes the compound mode of MAC-d flows data flow and available transmission formats and power bias value to UE by RRM control signaling, and does not have reference transmission form and its power bias Δ of re-transmission to the UE configuration _E-DPDCHThe reference transmission form is selected one or more in the available transmission formats for use, and comprises the transformat of speed minimum in the described available transmission formats, power bias Δ at least _E-DPDCHIt is the power bias value of up relatively Dedicated Control Channel DPCCH.

Step S15, UE determine current transformat according to the available transmission formats of configuration.Specifically comprise:

UE receives the permission transformat that the base station issues, to be the base station inform UE according to the quality of UE current transmission channel and the decision of ascending load surplus and by down channel to this permission transformat, and UE selects an identical or close transformat as current transformat TFC according to this permissions transformat in that the available transmission formats of SRNC configuration is concentrated _i, and corresponding power bias value Δ _{TFC, HARQ}=Δ _{I, j}

Step S16, UE calculate the relative gain factor of current transformat relative reference transformat.Concrete computational methods are same as the prior art, mainly comprise:

UE is according to reference transmission form and its power bias Δ _E-DPDCH, the gain factor that calculates the up relatively Dedicated Control Channel of E-DPDCHs channel of reference transmission form is:

${\mathrm{\β}}_{\mathrm{ed}\_\mathrm{ref}}={\mathrm{\β}}_c\·{10}^{\left(\frac{{\mathrm{\Δ}}_{E\_\mathrm{DPDCH}}}{20}\right)}$

The relative gain factor that UE calculates the E-DPDCHs channel relative reference transformat of current transformat is:

${\mathrm{\β}}_{\mathrm{ed},j}={\mathrm{\β}}_{\mathrm{ed}\_\mathrm{ref},m}\sqrt{\frac{L_{e\_\mathrm{ref},m}}{L_{e,j}}}\sqrt{\frac{K_{e,j}}{K_{e\_\mathrm{ref},m}}}$

Step S17, UE use the power bias value Δ of current transformat correspondence _{TFC, HARQ}Revise the above-mentioned relative gain factor, obtain revised E-DPDCHs channel gain factors.Revised gain factor calculating formula is:

${\mathrm{\β}}_{\mathrm{ed},j}={\mathrm{\β}}_{\mathrm{ed}\_\mathrm{ref},m}\×\sqrt{\frac{L_{e\_\mathrm{ref},m}}{L_{e,j}}}\sqrt{\frac{K_{e,j}}{K_{e\_\mathrm{ref},m}}}\×{10}^{\frac{{\mathrm{\Δ}}_{\mathrm{TFC},\mathrm{HARQ}}}{20}}$

The represented implication of relevant parameter is same as the prior art in the formula, no longer repeats.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (10)

1, a kind of method for obtaining gain factor of special physical data channel for upload enhance, be applied to the WCDMA system, this method comprises: pairing power bias value of different number of retransmissions and the actual transfer rate of obtaining data flow under the different transpost formats by link simulation, when user terminal (UE) when service wireless network controller (SRNC) is initiated service request, carry out the following step:

A, SRNC determine the compound mode of each professional data flow time division multiplexing transmission in a transmission cycle, transmission rate and the data flow maximum retransmission after the combination according to the service request type of UE; And, obtain UE available transmission formats and corresponding power bias value according to described transmission rate and data flow maximum retransmission and link simulation result coupling;

B, SRNC dispose described available transmission formats and the reference transmission form is given UE;

C, UE determine current transformat according to described available transmission formats;

D, UE calculate the relative gain factor of current transformat relative reference transformat, and use the power bias value of current transformat correspondence that this relative gain factor is revised, and obtain the gain factor of special physical data channel for upload enhance.

2, the method for claim 1 is characterized in that, describedly obtains the pairing power bias value of different number of retransmissions of data flow under the different transpost formats by link simulation, comprising:

Counting data flow according to simulated channel is not having to retransmit the Block Error Rate under the different signal to noise ratios when being N (N is a positive integer) with number of retransmissions, obtains data flow at the signal to noise ratio-Block Error Rate corresponding relation that does not have under re-transmission and the different number of retransmissions;

According to selected Block Error Rate, calculate the number of retransmissions N signal to noise ratio difference under the not re-transmission situation relatively by described corresponding relation, be the power bias value of data flow under this number of retransmissions.

3, method as claimed in claim 2 is characterized in that, described corresponding relation is not having re-transmission to describe with the one group of signal to noise ratio-Block Error Rate relation curve under the different number of retransmissions by data flow.

4, the method for claim 1 is characterized in that, describedly obtains the pairing actual transfer rate of different number of retransmissions of data flow under the different transpost formats by link simulation, comprising:

Send data block according to the transformat determined data rate;

According to the signal to noise ratio of different number of retransmissions under selected Block Error Rate of data flow, determine pairing transmitting power under the different number of retransmissions;

Count the correct data block number that receives in a period of time by simulated channel, obtain described actual transfer rate.

5, the method for claim 1 is characterized in that, the combination of data flow described in steps A mode is: will allow the identical set of streams of maximum retransmission to lump together.

6, the method for claim 1 is characterized in that, the maximum retransmission of data flow described in the steps A is in the data flow combination mode of this transmission cycle, and each data flow allows the minimum value of maximum retransmission.

7, the method for claim 1 is characterized in that, it is one or more in the described available transmission formats that SRNC described in the step B disposes reference transmission form to UE, and comprises the transformat of speed minimum in the described available transmission formats at least.

8, method as claimed in claim 7 is characterized in that, selects one and the immediate reference transmission form calculating of the current transformat relative gain factor among the described step D.

9, the method for claim 1 is characterized in that, also comprises among the described step C: UE selects an identical or close transformat as current transformat in described available transmission formats according to the permission transformat that the base station issues.

10, the method for claim 1 is characterized in that, uses the concrete computing formula of the described relative gain factor of power bias value correction of current transformat correspondence to be described in the step D:

${\mathrm{\β}}_{\mathrm{ed},j}={\mathrm{\β}}_{\mathrm{ed}\_\mathrm{ref},m}\×\sqrt{\frac{L_{e\_\mathrm{ref},m}}{L_{e,j}}}\sqrt{\frac{K_{e,j}}{K_{e\_\mathrm{ref},m}}}{\×10}^{\frac{{\mathrm{\Δ}}_{\mathrm{TFC},\mathrm{HARQ}}}{20}}$

In the formula: β _{Ed, j}Be revised gain factor; β _{Ed_ref, m}Gain factor for the reference transmission form; L _{E_ref, m}The enhancing Dedicated Physical Data Channel number that expression reference transmission form uses; L _{E, j}Represent the enhancing Dedicated Physical Data Channel number that current transformat uses; K _{E, j}The data bit number of representing current transformat; K _{E_ref, m}The data bit number of expression reference transmission form; Δ _{TFC, HARQ}Power bias value for current transformat correspondence.

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