CN103188776A - E-DCH transport format combination (E-TFC) selection method and system - Google Patents

Abstract

The invention discloses an E-DCH transport format combination (E-TFC) selection method and a system. The method comprises the steps: calculating a power maximum value beta 0, e-max according to an authorized power Parant given by a network; calculating a code rate maximum value lambada 0, e-max corresponding to the power maximum value beta 0; comparing the code rate maximum value lambada 0, e-max with a minimum code rate lambada n w-min configured by a network side, and confirming a maximum transmission code block index TB index and a minimum transmission code block index TB index according to a comparative result; and confirming size and sending power of a final transmission code block. The E-TFC selection method and the system optimize existing E-TFC selection, effectively reduce time complexity of correlation calculations, and reduce million instructions per second (MIPS) consumption in an E-TFC selection process.

Description

A kind of E-TFC system of selection and system

Technical field

The present invention relates to the communications field, particularly the method for E-TFC selection.

Background technology

Insert (high speed uplink packet access in High Speed Uplink Packet, HSUPA) strengthen Dedicated Control Channel transformat combination (E-DCH Transport Format Combination in, E-TFC) selection course more complicated, (Million Instructions Per Second MIPS) consumes and undoubtedly more and more higher data throughout is had great significance how to reduce by 1,000,000 grades the machine language instruction number that the per second of E-TFC selection course handles.

It is that regulation according to 25321 rowers realizes that existing E-TFC selects.Its main process comprises: step 1 determines set B.This set is logical channel set, comprises the highest priority logical channel of data to be transmitted such as a) having; B) can and a) in choose the multiplexing logical channel set that has data to send of logic channel.Step 2 produces the maximum transport block size k that authorization resources can be supported.Step 3 produces maximum medium access control-e protocol Data Unit (MAC-ePDU), its size≤k.MAC-d PDUs is from the logic channel in the set B (according to priority orders) among the MAC-e PDU, and spreading factor is constant, and modulation system is selected the modulation system of transmitted power minimum.

Step 1 in the above-mentioned E-TFC selection course and step 3 relate generally to the computing of logic aspect, and step 2 relates to more data operation.

The main contents of step 2 comprise: substep 1, and calculating obtains the transmitting block index TB index set of satisfying code check according to code check restriction principle; Substep 2, on the basis that the substep 1 resulting transmitting block index that satisfies code check is gathered, calculating obtains the transmitting block index set of satisfying power according to the power principle; Substep 3 on this basis, screens according to modulation system selection principle, obtains final transmitting block index set.

The applicant selects to further investigate to existing E-TFC, and the calculating of the substep 1 of discovery step 2 is comparatively complicated.Its process is to select the set of E-DCHTB size from E-DCH TB size table, the code check of each E-DCH TB size in this set must satisfy the restriction of code check, the code check that the TB size of E-DCH in this set calculates must minimum and maximal rate in network configuration between.In this substep 1, need each the transmission block size S in all E-DCH transmission block size tables of traversal _e, to calculate code check λ.Therefore, λ _eCalculating comparatively loaded down with trivial details, the time complexity of this calculating is 0 (log ₂ ⁿ).

In substep 2, the needed transmitted power P of E-DCH transmission block size _E-PUCHShould satisfy the maximum smaller or equal to the transmitted power of chip, and be less than according to the power β e that E-DCH transmission block size calculates and to equal authorization power+α e.Relate to a large amount of calculating about power β e and code check λ in this process.Wherein, rated output β _{0, e}With the time complexity of code check λ be O (n).

Therefore, the calculating about power and code check in the prior art is comparatively complicated, and the time complexity height causes the MIPS of E-TFC selection course to consume bigger.

Summary of the invention

The present inventor has proposed a kind of new technical scheme at this problem of calculation of complex in the existing E-TFC selection course.

An object of the present invention is to provide a kind of E-TFC and optimize system of selection, can effectively reduce computation complexity, thereby the MIPS that reduces the E-TFC selection course consumes.

According to an aspect of the present invention, provide a kind of E-TFC to optimize system of selection.This method comprises: according to the given authorization power P of network _Grant, rated output maximum β _{0, e-max}According to rate tables, calculate and power maximum β _{0, e-max}Corresponding code rate maximum λ _{0, e-max}With code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Compare, and determine maximum transmitted code block index TB index and minimum transfer code block index TB index according to comparative result; Determine final transmission code block size and transmitted power.

Preferably, rated output maximum β _{0, e-max}Step comprises:

Work as P _Grant+ α _e+ P _E-base+ L≤P _Max-txThe time, β _{0, e-max}=P _Grant-Δ _Harq

Work as P _Grant+ α _e+ P _E-base+ L＞P _Max-txThe time, β _{0, e-max}=P _Max-tx-P _E-base-L-α _e-Δ _Harq, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area, α _eBe the given authorization power of network, P _Max-txMaximum transmit power for chip.

Preferably, according to power maximum β _{0, e-max}The transmitted power P that calculates _E-PUCHNeed satisfy following relation:

P _E-PUCH≤P _max-tx。

Preferably, calculate transmitted power P _E-PUCHStep can comprise:

The rated output gain beta _e,

Particularly, power gain β _eCan adopt following formula to calculate,

β _e＝β _0，e+α _e+Δ _harq，

Wherein, α _eBe spreading factor gain, Δ _HarqBe the network configuration parameters value;

According to power gain β _eUtilize following formula to calculate transmitted power P _E-PUCH,

P _E-PUCH=P _E-base+ L+ β _e, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area.

Preferably, calculate code check maximum λ _{0, e-max}Step can comprise:

According to power maximum β _{0, e-max}, from rate tables, choose reference power β ₀And β ₁

Utilize following formula to calculate code check maximum λ _{0, e-max},

${\mathrm{\λ}}_{0,e-\max }={\mathrm{\λ}}_{\mathrm{\β}0}+\frac{{\mathrm{\λ}}_{\mathrm{\β}1}-{\mathrm{\λ}}_{\mathrm{\β}0}}{{\mathrm{\β}}_1-{\mathrm{\β}}_0}({\mathrm{\β}}_{0e-\max }-{\mathrm{\β}}_0),$ Wherein,

λ _{β 1}And λ _{β 0}Be β ₁And β ₀Difference corresponding code rate in rate tables.

Preferably, as power maximum β _{0, e-max}In rate tables between minimum code rate and the maximal rate, reference power β then ₀For in the rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Less than minimum power in the rate tables, reference power β then ₀Be the minimum power of described rate tables, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Be not less than maximal rate in the rate tables, then reference power β ₀For in the described rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁Be the maximum power value in the rate tables.

Preferably, the step of determining maximum transmitted code block index comprises:

Compare code check maximum λ _{0, e-max}Minimum code rate λ with network configuration _{N, w-min}, network configuration code check maximum λ _{N, w-max}Size,

Work as λ _{0, e-max}＞λ _{N, w-min}The time, according to comparative result, and utilize following formula to determine code block size S _{Tb_index},

S _Tb-index/ R _e≤ MIN (λ _{0, e-max}, λ _{N, w-min}), wherein, MIN (λ _{0, e-max}, λ _{N, w-max}) be λ _{0, e-max}With λ _{N, w-max}Smaller value,

Described maximum transmitted code block index is described S _Tb-indexThe maximum of corresponding transmission code block index in transmission code block concordance list;

Work as λ _{0, e}＜λ _{N, w-min}The time, maximum transmitted code block index is zero.

The step of determining minimum transfer code block index can comprise:

More described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Size, work as λ _{0, e}＞λ _{N, w-min}The time, determine code block size S according to following formula _Tb-index, λ _{N, w-min}≤ S _Tb-index/ R _e,

Described minimum transfer code block index is described S _Tb-indexThe minimum value of corresponding transmission code block index in transmission code block concordance list;

Work as λ _{0, e}＜λ _{N, w-min}The time, described minimum transfer code block index is zero.

Preferably, the step of determining final transmission code block size can comprise:

Obtain actual transmission block size S according to maximum transmitted code block index _Tb-index

The step of determining transmitted power can comprise:

Transmission block size S according to reality _Tb-index, utilize following formula to calculate actual code check λ _{0, e}, λ _{0, e}=S _Tb-index/ R _e

Code check λ according to reality _{0, e}, from rate tables, choose with reference to code check λ ₀And λ ₁

Utilize following formula to calculate actual power β _{0, e},

${\mathrm{\β}}_{0,e}={\mathrm{\β}}_{\mathrm{\λ}0}+\frac{{\mathrm{\β}}_{\mathrm{\λ}1}-{\mathrm{\β}}_{\mathrm{\λ}0}}{{\mathrm{\λ}}_1-{\mathrm{\λ}}_0}({\mathrm{\λ}}_{0,e}-{\mathrm{\λ}}_0);$

Utilize following formula to calculate actual power gain β _e,

β _e＝β _0，e+α _e+Δ _harq，

And, the power gain β that this is actual _eSatisfy following relational expression,

β _e≤P _grant+α _e；

Adopt following formula to calculate actual transmitted power P _E-PUCH,

P _E-PUCH＝P _e-base+L+β _e，

And, this transmitted power P _E-PUCHSatisfy following relational expression,

P _E-PUCH≤P _max-tx。

Preferably, according to a further aspect in the invention, the system that provides a kind of E-TFC to select.

This system comprises: the power maximum obtains the unit, is used for according to the given authorization power rated output maximum β of network _{0, e-max}The code check maximum obtains the unit, is used for calculating and power maximum β _{0, e-max}Corresponding code rate maximum λ _{0, e-max}Maximum transmitted code block index obtains the unit and minimum transfer code block index obtains the unit, is used for code check maximum λ _{0, e-max}Minimum code rate λ with network configuration _{N, w-min}Compare, and determine maximum transmitted code block index TB index and minimum transfer code block index TB index according to comparative result; The screening unit is used for determining final transmission code block size and transmitted power.

Preferably, the power maximum obtains the unit and comprises power maximum value calculation module, obtains power maximum β by following steps _{0, e-max}:

Work as P _Grant+ α _e+ P _E-base+ L≤P _Max-txThe time, β _{0, e-max}=P _Grant-Δ _Harq

Work as P _Grant+ α _e+ P _E-base+ L＞P _Max-txThe time, β _{0, e-max}=P _Max-tx-P _E-base-L-α _e-Δ _Harq, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area, α _eBe spreading factor gain, P _Max-txBe the maximum transmit power of chip, P _GrantBe authorization power.

Preferably, the power maximum obtains the unit and comprises that also transmitted power obtains module,

Described transmitted power obtains the resulting transmitted power P that obtains of module _E-PUCHSatisfy following relation:

P _E-PUCH≤P _max-tx。

Preferably, transmitted power obtains module and obtains described transmitted power P by following steps _E-PUCH:

The rated output gain beta _e,

Described β _eAdopt following formula to calculate,

β _e＝β _0，e+α _e+Δ _harq，

Wherein, α _eBe spreading factor gain, Δ _HarqParameter value for network configuration;

According to described power gain β _eUtilize following formula to calculate transmitted power P _E-PUCH,

P _E-PUCH=P _E-base+ L+ β _e, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area.

Preferably, the code check maximum obtains the unit and comprises: reference power is chosen module, is used for according to power maximum β _{0, e-max}, from rate tables, choose reference power β ₀And β ₁The code check maximum obtains module, is used for utilizing following formula to calculate described code check maximum λ _{0, e-max},

${\mathrm{\λ}}_{0,e-\max }={\mathrm{\λ}}_{\mathrm{\β}0}+\frac{{\mathrm{\λ}}_{\mathrm{\β}1}-{\mathrm{\λ}}_{\mathrm{\β}0}}{{\mathrm{\β}}_1-{\mathrm{\β}}_0}({\mathrm{\β}}_{0e-\max }-{\mathrm{\β}}_0),$ Wherein,

λ _{β 1}And λ _{β 0}Be β ₁And β ₀Difference corresponding code rate in rate tables.

Preferably,

As power maximum β _{0, e-max}In rate tables between minimum power and the maximum power, reference power β then ₀For in the rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Less than minimum power in the rate tables, reference power β then ₀Be the minimum power of described rate tables, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Be not less than maximum power in the rate tables, then reference power β ₀For in the described rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁Be the maximum power value in the rate tables.

Preferably, maximum transmitted code block index acquisition unit comprises:

First comparison module is used for more described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}, network configuration code check maximum λ _{N, w-max}Size,

Code block size first obtains module, works as λ _{0, e-max}＞λ _{N, w-min}The time, this code block size obtains module according to comparative result, utilizes following formula to determine code block size S _{Tb_index},

S _Tb-index/ R _e≤ MIN (λ _{0, e-max}, λ _{N, w-min}), wherein, MIN (λ _{0, e-max}, λ _{N, w-max}) be λ _{0, e-max}With λ _{N, w-max}Smaller value,

First searches module, is used for S _Tb-indexThe maximum of corresponding transmission code block index is as described maximum transmitted code block index in transmission code block concordance list;

Work as λ _{0, e}＜λ _{N, w-min}The time, maximum transmitted code block index is zero;

This minimum transfer code block index obtains the unit and comprises:

Second comparison module is used for relatively code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Size,

Code block size second obtains module, works as λ _{0, e}＞λ _{N, w-min}The time, code block size second obtains module can determine code block size S according to following formula _Tb-index,

λ _n，w-min≤S _tb-index/R _e

Second searches module, is used for S _Tb-indexThe minimum value of corresponding transmission code block index is as minimum transfer code block index in transmission code block concordance list;

Work as λ _{0, e}＜λ _{N, w-min}The time, minimum transfer code block index is zero.

Preferably, the screening unit comprises:

The actual transmissions block size obtains module, is used for determining actual transmission block size S according to maximum transmitted code block index _Tb-index

The transmission block size obtains module, is used for the transmission block size S according to reality _Tb-index, utilize following formula to calculate actual code check λ _{0, e},

λ _0，e＝S _tb-index/R _e；

Obtain module with reference to code check, be used for the code check λ according to reality _{0, e}, from rate tables, choose with reference to code check λ ₀And λ ₁

Actual power obtains module, is used for utilizing following formula to calculate actual β _{0, e}, its unit is dB,

${\mathrm{\β}}_{0,e}={\mathrm{\β}}_{\mathrm{\λ}0}+\frac{{\mathrm{\β}}_{\mathrm{\λ}1}-{\mathrm{\β}}_{\mathrm{\λ}0}}{{\mathrm{\λ}}_1-{\mathrm{\λ}}_0}({\mathrm{\λ}}_{0,e}-{\mathrm{\λ}}_0);$

The actual power gain obtains module, is used for utilizing following formula to calculate actual power gain,

β _e＝β _0，e+α _e+Δ _harq，

And, the power gain β that this is actual _eSatisfy following relational expression,

β _e≤P _grant+α _e；

Actual transmission power obtains module, adopts following formula to calculate actual transmitted power P _E-PUCH,

P _E-PUCH＝P _e-base+L+β _e，

And, this transmitted power P _E-PUCHSatisfy following relational expression,

P _E-PUCH≤P _max-tx。

An advantage of the present invention is, according to the given authorization power P of network _GrantIn the step of calculating maximal rate value and in the step according to the corresponding transmission block size of the maximal rate value calculating of calculating, the time complexity that related power calculation and code check calculate effectively reduces, thereby the MIPS that has reduced the E-TFC selection course consumes.

Description of drawings

The accompanying drawing that constitutes the part of specification has been described embodiments of the invention, and is used for explaining principle of the present invention together with the description.

With reference to accompanying drawing, according to following detailed, can be expressly understood the present invention more, wherein:

Fig. 1 is the flow chart of the method selected of E-TFC according to an embodiment of the invention.

Fig. 2 A is the structural representation of the system of E-TFC selection according to an embodiment of the invention; Fig. 2 B is the structural representation that the power maximum obtains the unit in the present embodiment; Fig. 2 C is the structural representation that the code check maximum obtains the unit in the present embodiment; Fig. 2 D is the structural representation that maximum transmitted code block index obtains the unit in the present embodiment; Fig. 2 E is the structural representation that minimum transfer code block index obtains the unit in the present embodiment; Fig. 2 F is the structural representation of screening unit in the present embodiment.

Embodiment

Describe various exemplary embodiment of the present invention in detail now with reference to accompanying drawing.It should be noted that: unless specify in addition, the parts of setting forth in these embodiments and positioned opposite, numeral expression formula and the numerical value of step do not limit the scope of the invention.

Simultaneously, should be understood that for convenience of description that the size of the various piece shown in the accompanying drawing is not to draw according to the proportionate relationship of reality.

Below be illustrative to the description only actually of at least one exemplary embodiment, never as any restriction to the present invention and application or use.

May not be discussed in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but under suitable situation, described technology, method and apparatus should be regarded as authorizing the part of specification.

In shown here and all examples of discussing, it is exemplary that any occurrence should be construed as merely, rather than as restriction.Therefore, other example of exemplary embodiment can have different values.

It should be noted that: represent similar terms in similar label and the letter accompanying drawing below, therefore, in case be defined in a certain Xiang Zaiyi accompanying drawing, then in accompanying drawing subsequently, do not need it is further discussed.

Fig. 1 shows the flow chart of the method for E-TFC selection according to an embodiment of the invention.

In step S101, according to the given authorization power of network, rated output maximum β _{0, e-max}

Power maximum β _{0, e-max}Can obtain as follows.

Work as P _Grant+ α _e+ P _E-base+ L≤P _Max-txThe time, power maximum β _{0, e-max}=P _Grant-Δ _Harq

Work as P _Grant+ α _e+ P _E-base+ L＞P _Max-txThe time, β _{0, e-max}=P _Max-tx-P _E-base-L-α _e-Δ _Harq, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area, P _GrantBe the given authorization power of network, P _Max-txBe the maximum transmit power of chip, α _eBe the spreading factor gain.

Wherein, according to power maximum β _{0, e-max}The transmitted power P that obtains of maximum value calculation _E-PUCHNeed satisfy following relation:

P _E-PUCH≤P _max-tx。

Particularly, can utilize following method to obtain transmitted power P _E-PUCH

At first, rated output gain beta _e

β _eCan adopt following formula to calculate,

β _e＝β _0，e+α _e+Δ _harq，

Wherein, α ₀Be spreading factor gain, Δ _HarqBe the network configuration parameters value.

Then, can be according to power gain β _eUtilize following formula to calculate transmitted power P _E-PUCH,

P _E-PUCH=P _E-base+ L+ β _e, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area.

Rated output maximum β in this step _{0, e-max}Time complexity be 0 (1).

In step S102, according to rate tables, calculate and described power maximum β _{0, e-max}Corresponding code rate maximum λ _{0, e-max}

Owing to comprise code rate information and power information in the rate tables, and the code check in the table and power are corresponding one by one, therefore can inquire about power according to code check, also can inquire about code check according to power.

In this step, code check maximum λ _{0, e-max}Can obtain by the following method:

At first, according to power maximum β _{0, e-max}, from rate tables, choose reference power β ₀And β ₁

Particularly, can utilize β in the code table ₀, β ₁And corresponding code check λ with it _{β 1}And λ _{β 0}Calculate.

Can utilize following formula to calculate code check maximum λ _{0, e-max},

${\mathrm{\λ}}_{0,e-\max }={\mathrm{\λ}}_{\mathrm{\β}0}+\frac{{\mathrm{\λ}}_{\mathrm{\β}1}-{\mathrm{\λ}}_{\mathrm{\β}0}}{{\mathrm{\β}}_1-{\mathrm{\β}}_0}({\mathrm{\β}}_{0e-\max }-{\mathrm{\β}}_0),$ Wherein,

λ _{β 1}And λ _{β 0}Be β ₁And β ₀Difference corresponding code rate in rate tables.

In optimal way, can adopt following method to select reference power.

As power maximum β _{0, e-max}In rate tables between minimum power and the maximum power,

Be the minimum power≤β in the rate tables _{0, e-max}Maximum power in the≤rate tables, then reference power β ₀For in the rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Less than minimum code rate in the rate tables, reference power β then ₀Be the minimum power of described rate tables, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Be not less than maximum power in the rate tables, then reference power β ₀For in the described rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁Be the maximum power value in the rate tables.

In this step, calculate code check maximum λ _{0, e-max}Time complexity also be O (1).

The above-mentioned method of selecting reference power only is exemplary, it will be understood by those of skill in the art that and can also select reference power according to additive method, for example selects reference power according to other rules from rate tables, thereby is used for calculating the code check maximum.

In step S103, according to code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Magnitude relationship is determined maximum transmitted code block index TB index and minimum transfer code block index TB index.

In this step, can be with described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Compare, and determine maximum transmitted code block index and minimum transfer code block index according to comparative result.

Can obtain maximum transmitted code block index by the following method:

Compare code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Code check maximum λ with network configuration _{N, w-max}Size.

Work as λ _{0, e-max}＞λ _{N, w-min}The time, according to comparative result, and utilize following formula to determine code block size S _{Tb_index},

S _tb-index/R _e≤MIN(λ _0，e-max，λ _n，w-min)。

The S that obtains according to following formula _Tb-indexThe maximum of corresponding transmission code block index can be used as maximum transmitted code block index in transmission code block concordance list.

Work as λ _{0, e}＜λ _{N, w-min}The time, maximum transmitted code block index is zero.

Can determine minimum transfer code block index by the following method:

At first, more described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Size.

Work as λ _{0, e}＞λ _{N, w-min}The time, can determine code block size S according to following formula _Tb-index,

λ _n，w-min≤S _tb-index/R _e

With top resulting S _Tb-indexIn transmission code block concordance list, search, find S _Tb-indexThe minimum value of corresponding transmission code block index, this index numerical value are exactly minimum transfer code block index.

Work as λ _{0, e}＜λ _{N, w-min}The time, described minimum transfer code block index is zero.

Calculating required time complexity in this step is O (log ₂ ⁿ).

In step S104, determine final transmission code block size and transmitted power.

Can obtain actual transmission block size S according to described maximum transmitted code block index _Tb-index

In addition, the acquisition step of transmitted power can comprise:

According to the transmission block size S that finds _Tb-indexCalculate actual code check λ _{0, e}

Particularly, can utilize following formula to calculate:

λ _0，e＝S _tb-index/R _e。

Afterwards, can be according to the code check λ of reality _{0, e}, from rate tables, choose with reference to code check λ ₀And λ ₁

Preferably, can utilize following method to select with reference to code check.

Code check λ when reality _{0, e}In rate tables between minimum code rate and the maximal rate,

Then with reference to code check λ ₀For in the rate tables less than this λ _{0, e}The maximal rate value,

With reference to code check λ ₁For in the rate tables greater than this this λ _{0, e}The minimum code rate value;

Code check λ when reality _{0, e}Less than minimum code rate in the rate tables,

Then with reference to code check λ ₀Be the minimum code rate of described rate tables, with reference to code check λ ₁For in the rate tables greater than this λ _{0, e}Minimum power;

Code check λ when reality _{0, e}Be not less than maximal rate in the rate tables,

Then with reference to code check λ ₀For in the described rate tables less than this λ _{0, e}The maximal rate value, with reference to code check λ ₁Be the maximal rate in the rate tables.

The above-mentioned method of choosing with reference to code check only is exemplary.Those skilled in the art also can choose with reference to code check by additive method and calculate or adopt the actual performance number of other schemes calculating.

Next, can utilize following formula to calculate actual β _{0, e},

${\mathrm{\β}}_{0,e}={\mathrm{\β}}_{\mathrm{\λ}0}+\frac{{\mathrm{\β}}_{\mathrm{\λ}1}-{\mathrm{\β}}_{\mathrm{\λ}0}}{{\mathrm{\λ}}_1-{\mathrm{\λ}}_0}({\mathrm{\λ}}_{0,e}-{\mathrm{\λ}}_0)\mathrm{dB}$

Can utilize following formula to calculate actual power gain.

β _e＝β _0，e+α _e+Δ _harqdB。

The power gain β that calculates _eNeed satisfy following relational expression:

β _e≤P _grant+α _e。

That is to say, by the above-mentioned relation formula, to power gain β _eScreen, thereby filter out corresponding power β _{0, e}, code check, transmission block size, thereby filter out transmitting block index.

Can utilize following formula to calculate actual transmitted power P _E-PUCH,

P _E-PUCH＝P _e-base+L+β _e。

Transmitted power P _E-PUCHSatisfy following relational expression,

P _E-PUCH≤P _max-tx

By a last relational expression, transmitted power be can screen, and then corresponding power gain, power, code check and transmission block size obtained, thus the index after obtaining to screen by this condition by the transmitting block index table.

An advantage of the present invention is, by the improvement of existing E-TFC being selected do, effectively reduces the time complexity of correlation computations, and the MIPS that has reduced the E-TFC selection course consumes.Wherein, the time complexity of rated output has dropped to O (1) from O (n), and the time complexity that calculates code check has dropped to O (log from O (n) ₂ ⁿ), effectively improved the efficiency of selection of E-TFC.

In addition, in technical scheme of the present invention, with code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Compare, and determine transmitting block index according to comparative result.This scheme is observed the minimax code check restriction of network configuration, and the E-TFC selection course is more optimized.

The invention also discloses the system that a kind of E-TFC selects.

Below in conjunction with Fig. 2 A-Fig. 2 F this system is described.Wherein, Fig. 2 A is the structural representation of the system of E-TFC selection according to an embodiment of the invention; Fig. 2 B is the structural representation that the power maximum obtains the unit in the present embodiment; Fig. 2 C is the structural representation that the code check maximum obtains the unit in the present embodiment; Fig. 2 D is the structural representation that maximum transmitted code block index obtains the unit in the present embodiment; Fig. 2 E is the structural representation that minimum transfer code block index obtains the unit in the present embodiment; Fig. 2 F is the structural representation of screening unit in the present embodiment.

Shown in Fig. 2 A, this system can comprise that the power maximum obtains unit 21, the code check maximum obtains unit 22, maximum transmitted code block index acquisition unit 23, minimum transfer code block index acquisition unit 24 and screening unit 25.

The power maximum obtains unit 21 according to the given authorization power rated output maximum β of network _{0, e-max}

Shown in Fig. 2 B, the power maximum obtains unit 21 can comprise power maximum value calculation module 211, obtains described power maximum β by following steps _{0, e-max}:

Work as P _Grant+ α _e+ P _E-base+ L≤P _Max-txThe time, β _{0, e-max}=P _Grant-Δ _Harq

Work as P _Grant+ α _e+ P _E-base+ L＞P _Max-txThe time, β _{0, e-max}=P _Max-tx-P _E-base-L-α _e-Δ _Harq, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area, α _eBe spreading factor gain, P _GrantBe the given authorization power of network, P _Max-txMaximum transmit power for chip.

Wherein, power maximum acquisition unit 21 can comprise that also transmitted power obtains module 212.

Transmitted power obtains the module 212 resulting transmitted power P that obtain _E-PUCHSatisfy following relation:

P _E-PUCH≤P _max-tx。

Particularly, transmitted power obtains module and can obtain transmitted power P by following steps _E-PUCH

At first, transmitted power obtains module 212 and can calculate power gain β according to following formula _e:

β _e=β _{0, e}+ α _e+ Δ _Harq, wherein, α _eBe spreading factor gain, Δ _HarqBe the network configuration parameters value.

Then, according to power gain β _eUtilize following formula to calculate transmitted power P _E-PUCH,

P _E-PUCH=P _E-base+ L+ β _e, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area.

Shown in Fig. 2 C, the code check maximum obtains unit 22 and is used for calculating and described power maximum β _{0, e-max}Corresponding code rate maximum λ _{0, e-max}

Particularly, code check maximum acquisition unit 22 can comprise that reference power is chosen module 221 and the code check maximum obtains module 222.

Wherein, reference power choose module 221 can be according to power maximum β _{0, e-max}, from rate tables, choose reference power β ₀And β ₁

The system of selection of reference power can be identical with the method among the last embodiment, do not repeat them here.The code check maximum obtains module 222 and can utilize following formula to calculate described code check maximum λ _{0, e-max},

${\mathrm{\λ}}_{0,e-\max }={\mathrm{\λ}}_{\mathrm{\β}0}+\frac{{\mathrm{\λ}}_{\mathrm{\β}1}-{\mathrm{\λ}}_{\mathrm{\β}0}}{{\mathrm{\β}}_1-{\mathrm{\β}}_0}({\mathrm{\β}}_{0e-\max }-{\mathrm{\β}}_0),$ Wherein,

λ _{β 1}And λ _{β 0}Be β ₁And β ₀Difference corresponding code rate in rate tables.

Shown in Fig. 2 D, maximum transmitted code block index obtains unit 23 and is used for code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Compare, and determine maximum transmitted code block index TB index according to comparative result.

This unit can comprise that first comparison module 231, code block size first obtain module 232 and first and search module 233.

Wherein, first comparison module 231 is used for relatively code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}, network configuration code check maximum λ _{N, w-max}Size.

Work as λ _{0, e-max}＞λ _{N, w-min}The time, code block size obtains module 232 can be according to comparative result, and utilizes following formula to determine code block size S _{Tb_index},

S _tb-index/R _e≤MIN(λ _0，e-max，λ _n，w-min)。

First searches module 233 can be used for described S _Tb-indexThe maximum of corresponding transmission code block index is as maximum transmitted code block index in transmission code block concordance list.

Work as λ _{0, e}＜λ _{N, w-min}The time, maximum transmitted code block index is zero.

Shown in Fig. 2 E, similarly, minimum transfer code block index obtains unit 24 and can be used for described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Compare, and determine minimum transfer code block index TB index according to comparative result.

This unit can comprise that second comparison module 241, code block size second obtain module 242 and second and search module 243.

Second comparison module, 241 usefulness can more described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Size.

Work as λ _{0, e}＞λ _{N, w-min}The time, code block size second obtains module 242 can determine code block size S according to following formula _Tb-index,

λ _n，w-min≤S _tb-index/R _e。

Second searches module 243 is used for S _Tb-indexThe minimum value of corresponding transmission code block index is as minimum transfer code block index in transmission code block concordance list.

Work as λ _{0, e}＜λ _{M, w-min}The time, described minimum transfer code block index is zero.

Shown in Fig. 2 F, the set of final transmission code block size can be determined in screening unit 25.

Screening unit 25 can comprise that the actual transmissions block size obtains module 251, actual bit rate acquisition module 252, obtains module 255 and actual transmission power acquisition module 256 with reference to code check acquisition module 253, actual power acquisition module 254, actual power gain.

Wherein, the actual transmissions block size obtains module 251 and can obtain actual transmission block size S according to described maximum transmitted code block index _Tb-index

Actual bit rate obtains module 252 and is used for according to the big or small S of the transmission block of described reality _Tb-index, utilize following formula to calculate actual code check λ _{0, e},

λ _0，e＝S _tb-index/R _e。

Obtaining module 253 with reference to code check can be according to the code check λ of reality _{0, e}, from rate tables, choose with reference to code check λ ₀And λ ₁

With reference to code check λ ₀And λ ₀Choose can be identical with the method among the last embodiment, do not repeat them here.

Actual power obtains module 254 and can utilize following formula to calculate actual β _{0, e},

${\mathrm{\β}}_{0,e}={\mathrm{\β}}_{\mathrm{\λ}0}+\frac{{\mathrm{\β}}_{\mathrm{\λ}1}-{\mathrm{\β}}_{\mathrm{\λ}0}}{{\mathrm{\λ}}_1-{\mathrm{\λ}}_0}({\mathrm{\λ}}_{0,e}-{\mathrm{\λ}}_0)\mathrm{dB}$

The actual power gain obtains module 255 and is used for utilizing following formula to calculate actual power gain,

β _e＝β _0，e+α _e+Δ _harqdB，

And, actual power gain β _eSatisfy following relational expression,

β _e≤P _grant+α _e；

Actual transmission power obtains module 256 and can adopt following formula to calculate actual transmitted power P _E-PUCH,

P _E-PUCH＝P _e-base+L+β _e

And, transmitted power P _E-PUCHSatisfy following relational expression,

P _E-PUCH≤P _max-tx。

So far, described the method and system of selecting according to E-TFC of the present invention in detail.For fear of covering design of the present invention, details more known in the field are not described.Those skilled in the art can understand fully and how implement technical scheme disclosed herein according to top description.

Though by example specific embodiments more of the present invention are had been described in detail, it should be appreciated by those skilled in the art that above example only is in order to describe, rather than in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can under situation about not departing from the scope of the present invention with spirit, above embodiment be made amendment.Scope of the present invention is limited by claims.

Claims (16)

1. the method selected of an E-TFC is characterized in that described method comprises:

According to the given authorization power P of network _Grant, rated output maximum β _{0, e-max}

According to rate tables, calculate and described power maximum β _{0, e-max}Corresponding code rate maximum λ _{0, e-max}

With described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}With maximal rate λ _{N, w-max}Compare, and determine maximum transmitted code block index TB index and minimum transfer code block index TB index according to comparative result;

Determine final transmission code block size and transmitted power.

2. the method for claim 1 is characterized in that, described rated output maximum β _{0, e-max}Step comprises:

Work as P _Grant+ α _e+ P _E-base+ L≤P _Max-txThe time, β _{0, e-max}=P _Grant-Δ _Harq

Work as P _Grant+ α _e+ P _E-base+ L＞P _Max-txThe time, β _{0, e-max}=P _Max-tx-P _E-base-L-α _e-Δ _Harq, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area, α _eBe spreading factor gain, P _GrantBe the given authorization power of network, P _Max-txBe the maximum transmit power of chip, Δ _HarqBe the network configuration parameters value.

3. method as claimed in claim 2 is characterized in that, according to described power maximum β _{0, e-max}The transmitted power P that calculates _E-PUCHSatisfy following relation:

P _E-PUCH≤P _max-tx。

4. method as claimed in claim 3 is characterized in that, described calculating transmitted power P _E-PUCHStep comprise:

The rated output gain beta _e,

Described β _eAdopt following formula to calculate,

β _e＝β _0，e+α _e+Δ _harq，

Wherein, α _eFor being spreading factor gain, Δ _HarqBe the network configuration parameters value;

According to described power gain β _eUtilize following formula to calculate transmitted power P _E-PUCH,

P _E-PUCH=P _E-base+ L+ β _e, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area.

5. the method for claim 1 is characterized in that, described calculating code check maximum λ _{0, e-max}Step comprise:

According to power maximum β _{0, e-max}, from rate tables, choose reference power β ₀And β ₁

Utilize following formula to calculate described code check maximum λ _{0, e-max},

${\mathrm{\λ}}_{0,e-\max }={\mathrm{\λ}}_{\mathrm{\β}0}+\frac{{\mathrm{\λ}}_{\mathrm{\β}1}-{\mathrm{\λ}}_{\mathrm{\β}0}}{{\mathrm{\β}}_1-{\mathrm{\β}}_0}({\mathrm{\β}}_{0e-\max }-{\mathrm{\β}}_0),$ Wherein,

λ _{β 1}And λ _{β 0}Be β ₁And β ₀Difference corresponding code rate in rate tables.

6. method as claimed in claim 5 is characterized in that,

As power maximum β _{0, e-max}Between the minimum power and maximum power in rate tables, reference power β then ₀For in the rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Less than minimum power in the rate tables, reference power β then ₀Be the minimum power of described rate tables, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Be not less than maximum power in the rate tables, then reference power β ₀For in the described rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁Be the maximum power value in the rate tables.

7. the method for claim 1 is characterized in that,

The step of described definite maximum transmitted code block index comprises:

More described code check maximum λ _{0, e-max}Minimum code rate λ with network configuration _{N, w-min}, network configuration maximal rate λ _{N, w-max}Size,

Work as λ _{0, e-max}＞λ _{N, w-min}The time, according to judged result, and utilize following formula to determine code block size S _{Tb_index},

S _Tb-index/ R _e≤ MIN (λ _{0, e-max}, λ _{N, w-max}), wherein, MIN (λ _{0, e-max}, λ _{N, w-max}) be λ _{0, e-max}With λ _{N, w-max}Smaller value,

Described maximum transmitted code block index is described S _Tb-indexThe maximum of corresponding transmission code block index in transmission code block concordance list;

Work as λ _{0, e}＜λ _{N, w-min}The time, maximum transmitted code block index is zero;

The step of described definite minimum transfer code block index comprises:

More described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, wmin}Size,

Work as λ _{0, e}＞λ _{N, w-min}The time, compare code check maximum λ _{0, e-max}Code check maximum λ with network configuration _{N, w-max}Size, and determine code block size S according to following formula _Tb-index, λ _{N, w-min}≤ S _Tb-index/ R _e,

Described minimum transfer code block index is described S _Tb-indexThe minimum value of corresponding transmission code block index in transmission code block concordance list;

Work as λ _{0, e}＜λ _{N, w-min}The time, described minimum transfer code block index is zero.

8. the method for claim 1 is characterized in that, describedly determines that the step of final transmission code block size comprises:

Obtain actual transmission block size S according to described maximum transmitted code block index _Tb-index

The step of described definite transmitted power comprises:

Transmission block size S according to described reality _Tb-index, utilize following formula to calculate actual code check λ _{0, e},

λ _0，e＝S _tb-index/R _e；

Code check λ according to described reality _{0, e}, from rate tables, choose with reference to code check λ ₀And λ ₁

Utilize following formula to calculate actual power β _{0, e},

${\mathrm{\β}}_{0,e}={\mathrm{\β}}_{\mathrm{\λ}0}+\frac{{\mathrm{\β}}_{\mathrm{\λ}1}-{\mathrm{\β}}_{\mathrm{\λ}0}}{{\mathrm{\λ}}_1-{\mathrm{\λ}}_0}({\mathrm{\λ}}_{0,e}-{\mathrm{\λ}}_0)\mathrm{dB};$

Utilize following formula to calculate actual power gain β _e,

β _e＝β _0，e+α _e+Δ _harqdB，

And, the power gain β of described reality _eSatisfy following relational expression,

β _e≤P _grant+α _e；

Adopt following formula to calculate actual transmitted power P _E-PUCH,

P _E-PUCH＝P _e-base+L+β _e，

And, described transmitted power P _E-PUCHSatisfy following relational expression,

P _E-PUCH≤P _max-tx。

9. the system selected of an E-TFC is characterized in that described system comprises:

The power maximum obtains the unit, is used for according to the given authorization power rated output maximum β of network _{0, e-max}

The code check maximum obtains the unit, is used for calculating and described power maximum β _{0, e-max}Corresponding code rate maximum λ _{0, e-max}

Maximum transmitted code block index obtains the unit and minimum transfer code block index obtains the unit, is used for described code check maximum λ _{0, e-max}Minimum code rate λ with network configuration _{N, w-min}Compare, and determine maximum transmitted code block index TB index and minimum transfer code block index TBindex according to comparative result;

The screening unit is used for determining final transmission code block size and transmitted power.

10. system as claimed in claim 9 is characterized in that, the power maximum obtains the unit and comprises power maximum value calculation module, is used for obtaining described power maximum β by following steps _{0, e-max}:

Work as P _Grant+ α _e+ P _E-base+ L≤P _Max-txThe time, β _{0, e-max}=P _Grant-Δ _Harq

Work as P _Garnt+ α _e+ P _E-base+ L＞P _Max-txThe time, β _{0, e-max}=P _Max-tx-P _E-base-L-α _e-Δ h _Arq, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area, α _eFor being spreading factor gain, P _Max-txMaximum transmit power for chip.

11. system as claimed in claim 10 is characterized in that, described power maximum obtains the unit and comprises that also transmitted power obtains module,

Described transmitted power obtains the resulting transmitted power P of module _E-PUCHSatisfy following relation:

P _E-PUCH≤P _max-tx。

12. system as claimed in claim 11 is characterized in that, described transmitted power obtains module and obtains described transmitted power P by following steps _E-PUCH:

The rated output gain beta _e,

Described β _eAdopt following formula to calculate,

β _e＝β _0，e+α _e+Δ _harq，

Wherein, α _eFor being spreading factor gain, Δ _HarqParameter value for network configuration;

According to described power gain β _eUtilize following formula to calculate transmitted power P _E-PUCH,

P _E-PUCH=P _E-base+ L+ β _e, wherein,

P _E-baseBe the performance number of closed-loop power control, L is the path loss of current area.

13. system as claimed in claim 9 is characterized in that, described code check maximum obtains the unit and comprises:

Reference power is chosen module, is used for according to power maximum β _{0, e-max}, from rate tables, choose reference power β ₀And β ₁

The code check maximum obtains module, is used for utilizing following formula to calculate described code check maximum λ _{0, e-max},

${\mathrm{\λ}}_{0,e-\max }={\mathrm{\λ}}_{\mathrm{\β}0}+\frac{{\mathrm{\λ}}_{\mathrm{\β}1}-{\mathrm{\λ}}_{\mathrm{\β}0}}{{\mathrm{\β}}_1-{\mathrm{\β}}_0}({\mathrm{\β}}_{0e-\max }-{\mathrm{\β}}_0),$ Wherein,

λ _{β 1}And λ _{β 0}Be β ₁And β ₀Difference corresponding code rate in rate tables.

14. system as claimed in claim 13 is characterized in that,

As power maximum β _{0, e-max}In rate tables between minimum power and the maximum power, reference power β then ₀For in the rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Less than minimum power in the rate tables,

Reference power β then ₀Be the minimum power of described rate tables, reference power β ₁For in the rate tables greater than this β _{0, e-max}Performance number in minimum value;

As power maximum β _{0, e-max}Be not less than maximum power in the rate tables,

Reference power β then ₀For in the described rate tables less than this β _{0, e-max}Performance number in maximum, reference power β ₁Be the maximum in the rate tables.

15. system as claimed in claim 9 is characterized in that,

Described maximum transmitted code block index obtains the unit and comprises:

First comparison module is used for more described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}, network configuration code check maximum λ _{N, w-max}Size,

Code block size first obtains module, works as λ _{0, e-max}＞λ _{N, w-min}The time, according to comparative result, and utilize following formula to determine code block size S _{Tb_index},

S _Tb-index/ R _e≤ MIN (λ _{0, e-max}, λ _{N, w-max}), wherein, MIN (λ _{0, e-max}, λ _{N, w-max}) be λ _{0, e-max}With λ _{N, w-max}Smaller value,

First searches module, is used for described S _Tb-indexThe maximum of corresponding transmission code block index is as described maximum transmitted code block index in transmission code block concordance list;

Work as λ _{0, e}＜λ _{N, w-min}The time, maximum transmitted code block index is zero;

Described minimum transfer code block index obtains the unit and comprises:

Second comparison module is used for more described code check maximum λ _{0, e-max}Minimum code rate λ with the network side configuration _{N, w-min}Size,

Code block size second obtains module, works as λ _{0, e}＞λ _{N, w-min}The time, code block size second obtains module can determine code block size S according to following formula _Tb-index,

λ _n，w-min≤S _tb-index/R _e，

Second searches module, is used for S _Tb-indexThe minimum value of corresponding transmission code block index is as minimum transfer code block index in transmission code block concordance list;

Work as λ _{0, e}＜λ _{N, w-min}The time, described minimum transfer code block index is zero.

16. system as claimed in claim 9 is characterized in that, described screening unit comprises:

The actual transmissions block size obtains module, is used for obtaining actual transmission block size S according to described maximum transmitted code block index _Tb-index

Actual bit rate obtains module, is used for the transmission block size S according to described reality _Tb-index, utilize following formula to calculate actual code check λ _{0, e},

λ _0，e＝S _tb-index/R _e；

Obtain module with reference to code check, be used for the code check λ according to described reality _{0, e}, from rate tables, choose with reference to code check λ ₀And λ ₁

Actual power obtains module, is used for utilizing following formula to calculate actual β _{0, e},

${\mathrm{\β}}_{0,e}={\mathrm{\β}}_{\mathrm{\λ}0}+\frac{{\mathrm{\β}}_{\mathrm{\λ}1}-{\mathrm{\β}}_{\mathrm{\λ}0}}{{\mathrm{\λ}}_1-{\mathrm{\λ}}_0}({\mathrm{\λ}}_{0,e}-{\mathrm{\λ}}_0);$

The actual power gain obtains module, is used for utilizing following formula to calculate actual power gain,

β _e＝β _0，e+α _e+Δ _harq，

And, the power gain β of described reality _eSatisfy following relational expression,

β _e≤P _grant+α _e；

Actual transmission power obtains module, adopts following formula to calculate actual transmitted power P _E-PUCH,

P _E-PUCH＝P _e-base+L+β _e，

And, described transmitted power P _E-PUCHSatisfy following relational expression,

P _E-PUCH≤P _max-tx。

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