CN1667988B - A method of parsing from the transmission format combination calculation value to the transmission format indication - Google Patents

Abstract

The present invention analyzes the transmission format combination calculation value CTFC to the transmission format indicator TFI of each transmission channel, and obtains the TFI of each transmission channel by performing recursive modulo and integer division operations on CTFC and the transmission format number L of each transmission channel. It includes the following steps: the receiver obtains the parameter CTFC, the number of transmission channels I, and the number of transmission formats L ₁ , L ₂ , ..., L _I of each transmission channel through the physical layer signaling of TFCI; sets the intermediate variable T_CTFC and the loop variable i The initial values are CTFC and 1 respectively; execute the loop operation TFI _i ＝T_CTFC MOD L _i , T_CTFC＝T_CTFCDIV L _i , where MOD and DIV are respectively modulo and integer division operations; add 1 to i and execute the next cycle until i =I Obtain TFI _I . The present invention skillfully utilizes the internal relationship between TFI and CTFC of each transmission channel, and completes the analysis from CTFC to TFI through simple calculation.

Description

A kind of analytic method of realizing the transformat combination calculated value to the transformat indication

Technical field

The present invention relates to the mobile communication technology field of channel multiplexing, relate in particular to the transformat combination calculated value (CalculatedTransport Format Combination) (hereinafter to be referred as CTFC) in third generation TD SDMA (Time Division-Sync Code Division Multiple Access) (hereinafter to be referred as TD-SCDMA) and WCDMA (Wideband Code Division Multiple Access) (hereinafter to be referred as WCDMA) mobile communication standard is indicated (Transport FormatIndicator) (hereinafter to be referred as TFI) to the transformat of each transmission channel (Transport Channel) (hereinafter to be referred as TrCH) analytic method.

Background technology

In order to utilize radio channel resource efficiently, introduced the multiplexing mechanism of transmission channel in WCDMA and the TD-SCDMA mobile communication system, be about to a plurality of transmission channels and be multiplexed into a yard composite transport channel (Code Composite Transport Channel) (C TrCH), and then CCTrCH is mapped to physical channel, thereby, avoided single transmission channel because speed is low and also must distribute the wasting of resources that physical channel caused at least.

The transformat (TransportFormat) (hereinafter to be referred as TF) that participates in each multiplexing transmission channel of CCTrCH is to notify the recipient's by a kind of physical layer signaling of transformat combination indication (Transport FormatCombination Indicator) (hereinafter to be referred as TFCI) that cries.Since the time variation of TF, (every 10ms changes once) that becomes when TFCI also is.

Yet TFCI does not directly indicate the transformat of each transmission channel, and the transformat that it only obtains each TrCH for the recipient provides necessary index information.The purpose of doing like this is to improve the air interface information transfer efficiency as far as possible.The recipient obtains after the TFCI, obtains the numerical value of CTFC by tabling look-up, and then according to certain algorithm, resolves the TFI that this CTFC obtains each TrCH, and being tabled look-up by TFI to obtain corresponding transformat TF.

As seen CTFC is the instrument of transformat combination efficient signaling (Efficient Signalling), and its introducing makes that the information of interface transmission aloft becomes more efficient.Following tube is stated the structure of CTFC.

If I is the TrCH number that comprises in the transformat combination; Each transmission channel TrCH _iL is arranged _iIndividual transformat, i=1 wherein, 2 ..., I; Transformat indication TFI _iCan get L _iIndividual value, TFI _iValue be 0,1 ..., L _i-1, i.e. TFI _i∈ 0,1 ..., L _i-1}, wherein L _iBe positive integer.

Definition positive integer P _i=L ₀L ₁L _I-1, i=1,2 ..., I; I is an integer, and L ₀=1.

If transformat combination (Transport Format Combination) (hereinafter to be referred as TFC) is TFC (TDI ₁, TFI ₂..., TFI _I), TrCH wherein ₁Transformat indication TDI is arranged ₁, TrCH ₂Transformat indication TFI is arranged ₂Or the like.Corresponding C TFC (TFI ₁, TFI ₂..., TFI _I) calculate with following formula:

$\mathrm{CTFC}({\mathrm{TFI}}_1,{\mathrm{TFI}}_2,\·\·\·,{\mathrm{TFI}}_I)=\underset{i=1}{\overset{I}{\mathrm{\Σ}}}{\mathrm{TFI}}_i\·P_i---\left(1\right)$

To common down channel, " TrCH _i" number the order that it is listed for system information (SYSTEM INFORMATION) message in proper order since 1 with ascending order.

In other cases, to the TFCI field of each separation, " TrCH _i" number since 1 with ascending order, arrange by the transmission channel sign ascending order of the channel that is mapped to the TFCI field.

How said method has provided the transformat combination TFC (TFI according to TrCH ₁, TFI ₂..., TFI _I) and every transmission channel TrCH _iTransformat count L _iConstruct corresponding C TFC, thereby realize effective indication of the multiplexed format of transmission channel.

The recipient obtains after the CTFC value by TFCI, need parse TFC (TFI ₁, TFI ₂..., TFI _I).In Radio Resource control (RadioResource Control) (being called for short RRC) the layer standard of WCDMA and TD-SCDMA, provide the building method of CTFC at present, but do not provided analytic method in the standard.

Disclosed CTFC analytic method mainly contains two kinds.A kind of is look-up table, and its principle is as follows: according to the building method of above-mentioned CTFC, in current CCTrCH configuration, a unique TFC (TFI is arranged ₁, TFI ₂..., TFI _I) corresponding with it.TFC (the TFI of all possible CTFC value and its correspondence ₁, TFI ₂..., TFI _I) constitute a table, as long as the recipient forms this table in advance, after getting access to CTFC, table look-up by TFCI, just can obtain current transformat combination TFC.

Obvious this method is inadvisable, at first, counts I and transmission channel TrCH when participating in multiplexing transmission channel _iTransformat count L _iWhen very big, question blank can be very big, causes producing required operation time of this table and the required all increases greatly of memory space of storing queries table.Secondly, because in communication process, the configuration of CCTrCH may change, and the transformat number of transmission channel is unfixing yet, therefore, needs the recipient to produce question blank in real time, and this is great burden concerning the recipient.We can say that look-up table is the minimum a kind of method of efficient.

Another kind method is that the inverse process that directly utilizes CTFC to produce obtains TFC.From the building method of CTFC as can be known:

$\mathrm{CTFC}({\mathrm{TFI}}_1,{\mathrm{TFI}}_2,\·\·\·,{\mathrm{TFI}}_I)=\underset{i=1}{\overset{I}{\mathrm{\Σ}}}{\mathrm{TFI}}_i\·P_i$

Following formula is rewritten as:

CTFC(TFI ₁，TFI ₂，…，TFI _I)＝TFI ₁·P ₁TFI ₂·P ₂+…+TFI _I·P _I (2)

This method is at first calculating P ₁, P ₂..., P _IValue, then from big to small, by asking CTFC repeatedly divided by positive integer P _iQuotient and the remainder, calculate the transformat combination of transmission channel.TFI _iBe the merchant who at every turn tries to achieve.This method has been utilized the characteristics of CTFC, and is comparatively practical, but still need ask intermediate variable P ₁, P ₂..., P _IValue, seeming, some is loaded down with trivial details.

Summary of the invention

In view of above-mentioned, the object of the present invention is to provide a kind of more simple method, directly obtain TFC (TFI ₁, TFI ₂..., YFI _I).

The realization transformat combination calculated value that the present invention proposes promptly utilizes transformat combination calculated value CTFC to parse transformat combination TFC (TFI to the analytic method of transformat indication ₁, TFI ₂..., TFI _I), its characteristics are that algorithm complex is little, comprise following treatment step:

Step 1, recipient count L by physical layer signaling acquisition transformat combination calculated value CTFC, the transmission channel number I of transformat combination indication TFCI and the transformat of each transmission channel ₁, L ₂..., L _IValue;

Step 2, the initial value that intermediate variable T_CTFC and cyclic variable i be set are respectively transformat combination calculated value CTFC and 1, i.e. T_CTFC=CTFC, i=1;

Step 3, is at first counted L with the transformat of intermediate variable T_CTFC and transmission channel _iCarry out modulo operation, and will be worth the transformat indication TFI that composes to each transmission channel _i, promptly

TFI _i＝T_CTFC MOD L _i； (3)

Then, the transformat of intermediate variable T_CTFC and transmission channel is counted L _iDivide exactly computing, and will be worth tax to intermediate variable T_CTFC, promptly

T_CTFC＝T_CTFC DIV L _i； (4)

Afterwards, i adds 1 with cyclic variable, and will be worth tax to i, promptly

i＝i+1； (5)

At last, judge whether cyclic variable i is less than or equal to transmission channel number I, if execution in step 3 then, otherwise execution in step 4;

Step 4, acquisition transformat combination TFC (TFI ₁, TFI ₂..., TFI _I), end operation.

The present invention has utilized the TFI of each transmission channel and the internal relation between the CTFC dexterously, finishes the parsing of CTFC to TFI by simple calculations.In a word, transformat combination calculated value provided by the invention is simple, direct to the analytic method of transformat indication, has the low characteristics of algorithm complex.

Below in conjunction with accompanying drawing, the concrete enforcement of the method for the invention is described in further detail.For those skilled in the art that, from the description to the inventive method, above-mentioned and other purposes of the present invention, feature and advantage will be apparent.

Description of drawings

Fig. 1 is the process chart of transformat combination calculated value of the present invention to the analytic method of transformat indication.

Embodiment

The present invention is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the process chart of transformat combination calculated value of the present invention to the analytic method of transformat indication.As shown in Figure 1, realization transformat combination calculated value of the present invention divides following treatment step to implement to the analytic method of transformat indication is concrete:

Step 1, recipient count L by physical layer signaling acquisition transformat combination calculated value CTFC, the transmission channel number I of transformat combination indication TFCI and the transformat of each transmission channel ₁, L ₂, L _IValue;

Step 2, the initial value that intermediate variable T_CTFC and cyclic variable i be set are respectively transformat combination calculated value CTFC and 1, i.e. T_CTFC=CTFC, i=1;

Step 3, is at first counted L with the transformat of intermediate variable T_CTFC and transmission channel _iCarry out modulo operation, and will be worth the transformat indication TFI that composes to each transmission channel _i, promptly

TFI _i＝T_CTFC MOD L _i；

Then, the transformat of intermediate variable T_CTFC and transmission channel is counted L _iDivide exactly computing, and will be worth tax to intermediate variable T_CTFC, promptly

T_CTFC＝T_CTFC DIV L _i；

Afterwards, i adds 1 with cyclic variable, and will be worth tax to i, promptly

i＝i+1；

At last, judge whether cyclic variable i is less than or equal to transmission channel number I, if execution in step 3 then, otherwise execution in step 4;

Step 4, acquisition transformat combination TFC (TFI ₁, TFI ₂..., TFI _I), end operation.

Wherein, said method is based on that the characteristics of above-mentioned transformat combination calculated value CTFC itself derive out, according to the building method of CTFC, promptly according to above-mentioned P _i=L ₀L ₁L _I-1And formula (2), as can be known

CTFC(TFI ₁，TFI ₂，…，TFI _I)＝TFI ₁+TFI ₂·L ₁+TFI ₃·L ₁·L ₂

+…+TFI _I·L ₁·L ₂·…·L _I-1 (6)

Above-mentioned transformat combination calculated value CTFC is the later numeral that forms of transformat indication TFI process conversion (in order to guarantee uniqueness corresponding between CTFC and the TFC, this conversion the is necessary) sum by each transmission channel in essence.In case the value of CTFC drop on the interval [0, L ₁) on, be easy to judge that the value of CTFC is by TFI ₁Constitute, TrCH is promptly only arranged ₁Transformat be non-zero; In case drop on interval [L ₁, L ₁+ L ₁L ₂) on, then CTFC is by TFI ₁And TFI ₂Constitute, TrCH is promptly only arranged ₁And TrCH ₂Transformat be non-zero, and the like.Below according to above-mentioned formula (6) this analytic method of deriving:

I=1 can get:

$\mathrm{CTFC}={\mathrm{<figure-callout\; id="1"\; label="TFI"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">TFI</figure-callout>}}_1\&DoubleRightArrow;{\mathrm{<figure-callout\; id="1"\; label="TFI"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">TFI</figure-callout>}}_1=\mathrm{CTFC}$

I=2 can get:

$\mathrm{CTFC}={\mathrm{<figure-callout\; id="1"\; label="TFI"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">TFI</figure-callout>}}_1+{\mathrm{TFI}}_2\&CenterDot;{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">L</figure-callout>}}_1\&DoubleRightArrow;{\mathrm{<figure-callout\; id="1"\; label="TFI"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">TFI</figure-callout>}}_1={\mathrm{<figure-callout\; id="1"\; label="CTFCMODL"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">CTFCMODL</figure-callout>}}_1,$ TFI ₂＝CTFC DIVL

I=3 can get:

TFI ₁＝CTFC MOD L ₁，T_CTFC＝CTFC DIV L ₁

TFI ₂＝T_CTFC MOD L ₂，TFI ₃＝T_CTFC DIV L ₂

For I＞3 arbitrarily, can get

Then have ${\mathrm{<figure-callout\; id="1"\; label="TFI"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">TFI</figure-callout>}}_1=\mathrm{<figure-callout\; id="1"\; label="CTFCMOD\; L"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">CTFCMOD</figure-callout>}{L}_{}{}_1,T\_\mathrm{<figure-callout\; id="1"\; label="CTF\; C"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">CTF</figure-callout>}{C}_{}{}_1\&DoubleLeftArrow;\mathrm{<figure-callout\; id="1"\; label="CTFCDIV\; L"\; filenames="H2005100644762E00011.png"\; state="\{\{state\}\}">CTFCDIV</figure-callout>}{L}_{}{}_1$

TFI ₂＝T_CTFC ₁ MOD L ₂，T_CTFC ₂＝T_CTFC ₁ DIV L ₂

…

TFI _I-1＝T_CTFC _I-2 MOD L _I-1

TFI _I＝T_CTFC _1-2 DIV L _I-1

According to above-mentioned derivation as can be seen, as long as to last TFI, i.e. TFI _IOnce handle, just can obtain this analytic method.In fact, the situation for top any I makes T_CTFC _I-1=T_CTFC _I-2DIV L _I-1, TFI is then arranged _I=T_CTFC _I-1MOD L _IUtilize the thought of recurrence, realize that this analytic method is obvious.

Illustrated below in conjunction with a specific embodiment.Suppose to participate in four transmission channel TrCH of combination ₁, TrCH ₂, TrCH ₃, TrCH ₄The corresponding L of difference ₁=6, L ₂=5, L ₃=2, L ₄=2.The transmission format set of above-mentioned four transmission channels (Transport Format Set) (being called for short TFS) as shown in Table 1, wherein transformat comprises dynamic part and static part, only simply represents with the transmission block and the transmission set of dynamic part here.

Table one:

TFI	TrCH 1	TrCH 2	TrCH 3	TrCH 4
					TF0＝0	(0×81)	(0×103)	(0×60)	(0×144)
TF1＝1	(1×39)	(1×53)	(1×60)	(1×144)
					TF2＝2	(1×42)	(1×63)	N/A	N/A
TF3＝3	(1×55)	(1×84)	N/A	N/A
					TF4＝4	(1×75)	(1×103)	N/A	N/A
TF5＝5	(1×81)	N/A	N/A	N/A

Calculate the pairing CTFC value of each TFC according to formula (6), as shown in Table 2.

Table two:

TFCS No.	TFC	CTFC
			TFC1	(TF0，TF0，TF0，TF0)	0
TFC2	(TF1，TF0，TF0，TF0)	1
			TFC3	(TF2，TF1，TF0，TF0)	8
TFC4	(TF3，TF2，TF0，TF0)	15
			TFC5	(TF4，TF3，TF0，TF0)	22
TFC6	(TF5，TF4，TF1，TF0)	59
			TFC7	(TF0，TF0，TF0，TF1)	60
TFC8	(TF1，TF0，TF0，TF1)	61
			TFC9	(TF2，TF1，TF0，TF1)	68
TFC10	(TF3，TF2，TF0，TF1)	75
			TFC11	(TF4，TF3，TF0，TF 1)	82
TFC12	(TF5，TF4，TF1，TF1)	119

The hypothesis recipient receives that the CTFC of TFCI correspondence is 119 now, i.e. last in the table two.Can get according to top implementation step:

A, can get: CTFC=119, I=4, L according to step 1 ₁=6, L ₂=5, L ₃=2, L ₄=2;

B, can get: T_CTFC=119, i=1 according to step 2;

C, can obtain according to step 3:

TFI ₁＝119 MOD 6＝5，T_CTFC＝119 DIV 6＝19，i＝2；

TFI ₂＝19 MOD 5＝4，T_CTFC＝19 DIV 5＝3，i＝3；

TFI ₃＝3 MOD 2＝1，T_CTFC＝3 DIV 2＝1，i＝4；

TFI ₄＝1 MOD 2＝1，T_CTFC＝1 DIV 2＝0，i＝5；

D, can obtain TFC (5,4,1,1) according to step 4, promptly the TFC in the table two (TF5, TF4, TF1, TF1).

Though the present invention with preferred embodiment openly as above, the example of the visualization that this just lifts for the ease of understanding should not be considered to be limitation of the scope of the invention.Equally; the ordinary skill of technical field all can be according to the description of technical scheme of the present invention and preferred embodiment thereof under any; make various possible being equal to and change or replacement, but all these changes or replacement all should belong to the protection range of claim of the present invention.

Claims (1)

1. An analytic method for realizing transmission format combination calculation value to transmission format indication, is characterized in that comprising following processing steps: Step 1. The receiver obtains the calculated value CTFC of the transmission format combination, the number I of transmission channels, and the values of the transmission format numbers L ₁ , L ₂ ..., L ₁ of each transmission channel through the physical layer signaling indicated by the transmission format combination; Step 2. Set the initial values of the intermediate variable T_CTFC and the loop variable i to be the transmission format combination calculation value CTFC and 1 respectively; Step 3, at first, carry out the modulus operation with the transmission format number L _i of the intermediate variable T_CTFC of the transmission channel, and assign the value to the transmission format indication TEI _i of each transmission channel, that is, TFI _i =T_CTFCMODL _i ; then, the intermediate variable T_CTFC and the number of transmission formats L _i of the transmission channel perform an integer division operation, and assign the value to the intermediate variable T_CTFC, that is, T_CTFC=T_CTFC DIVL _i ; after that, add 1 to the loop variable i, and assign the value to i, that is, i=i +1; Finally, judge whether the loop variable i is less than or equal to the number of transmission channels I, if so, execute step 3, otherwise execute step 4; Step 4. Obtain the transport format combination TFC (TFI ₁ , TFI ₂ , . . . , TFI _I ) indicated by the transport format of one transport channel, and end the operation.

Images