CN1527519A - Transmission format combination set configuring method for WCDMA system - Google Patents

Abstract

The present invention relates to the transmission format combination set (TFCS) configuration method of distributing transmission to UE in WCDMA system. The present invention first obtains TFCS set via completely arranging all the transmission channels and then deletes or decreases the set in case that the TFC amount in the set exceeds that the UE can support. Each time, one TFC is deleted, which is ensured to be not one part of 'TTI restriction' of any other TFC. The present invention makes it possible to obtain optimal TFCS configuration, which can meet the limitation in maximum TFC number of TTI restriction and UE radio access capacity and has maximum TFC number, resulting in maximum possibility of obtaining highest transmission efficiency.

Description

A kind of broadband CDMA system transmission format combination configuring method

Technical field

The present invention relates to (Wideband Code Division Multiple Access at WCDMA, Wideband Code Division Multiple Access (WCDMA) inserts) communications field, specifically describe to relate to and in the WCDMA system, give UE (User Equipment, subscriber equipment) method of the relevant TFCS (Transport Format Combination Set, transport format combination set) of distribution transmission channel.

Background technology

In the WCDMA system, the communication between UTRAN (Universal Terrestrial Radio Access Network, universal land radio access web) and the UE is carried out on transmission channel, and transmission channel finally is mapped to physical channel again.A UE may have many transmission channels simultaneously.For transmission channel, the data bit that is transmitted on it is transmission block or the transport block set that arrives for the cycle with Transmission Time Interval (TTI, Transmission Timing Interval).

Transformat (TF, Transport Format) has been described the form of certain transmission channel transmitting data piece collection of a certain moment, and this form is made up of dynamic and semi-static two parts.

The attribute of dynamic part comprises:

-transport block length;

-transport block set length;

The attribute of semi-static part comprises:

—TTI；

-coded system;

-parameters of rate matching;

-error correction coding length; Deng

Transformat such as a transmission channel is: { 320bit, 640bit} illustrate that this transformat comprises two transmission blocks to dynamic part, and the length of each transmission block is 320bit.

Semi-static part: { TTI=10ms, convolutional encoding, parameters of rate matching=1}

Transmission format set (TFS, Transport Format Set) refer to certain transmission channel the set of the transformat that might use.The semi-static part of interior all transformats of TFS all is identical, has only the dynamic part difference.

For example the TFS of certain transmission channel is defined as follows:

-dynamic part { 320bit, 320bit}, { 320bit, 640bit}, { 320bit, 1280bit}

-semi-static part { TTI=10ms, convolutional encoding, parameters of rate matching=2}

Transformat combination (TFC, Transport Format Combination) is meant certain UE combination of transformat on all transmission channels at a time.Suppose that certain UE has 3 transmission channel TCH1, TCH2 and TCH3, it possible TFC is as follows so:

TCH1: dynamic part { 20bit, 20bit}, semi-static part { TTI=10ms, convolutional encoding, parameters of rate matching=2}

TCH2: dynamic part { 320bit, 1280bit}, semi-static part { TTI=10ms, convolutional encoding, parameters of rate matching=3}

TCH3: dynamic part { 320bit, 320bit}, semi-static part { TTI=10ms, Turbo coding, parameters of rate matching=4}.

And transport format combination set (TFCS, Transport Format Combination Set) be exactly certain UE in a transmission direction (upstream or downstream) the set of the TFC that might use.

The employed TFCS of UE is by (the Radio NetworkController of the RNC among the UTRAN in once communicating by letter, radio network controller) disposes and provide, and in communication process transmitting terminal will be in every 10ms with the TFC of current employing by TFCI (Transport Format Combination Indicator, transformat combination indication) notice opposite end.TFCI is appreciated that it is an index value, has indicated a TFC among the current TFCS.

Stipulated that in 3GPP agreement 25.331 TFCS that RNC disposes to UE must meet the following conditions:

1, must comprise " TFCS minimal set " among the TFCS.Minimal set TFCS comprises:

A, an empty TFC who forms by the empty TF of all transmission channels;

B, the TFC of lowest speed TF of the transmission channel of each separate operation (if guaranteed rate requirement is exactly the corresponding TF that guarantees rate requirement) and the empty TF combination of every other Traffic Channel;

For example, suppose that a UE has two transmission channels, comprises 0 among the TFS of transmission channel 1, TF ₁And TF ₂3 transformat (TF ₂The data bit number that is comprised is greater than TF ₁The data bit number that is comprised), comprise 0 among the TFS of transmission channel 2, TF ₃Two transformats, the TFCS minimal set of UE just comprises following 3 TFC so:

{0，0}

{0，TF ₃}

{TF ₁，0}

2, for each TFC (being made as TFC1) among the TFCS, for each TTI among this TFC, if the transformat on the pairing transmission channel of this TTI is not 0, must also there be such TFC (being made as TFC2) among the TFCS so, TFC2 satisfies condition: all TTI are necessary for 0 less than the transformat of the transmission channel of above-mentioned TTI among the TFC2, and the transformat of remaining transmission channel is identical with corresponding transmission channel among the TFC1.

Above-mentioned second condition can be referred to as " TTI constraint ", and this constraint can illustrate with following Example:

Suppose that UE has 4 transmission channel: TCH1, TCH2, TCH3 and TCH4, the TTI between them satisfies condition: TTI _TCH1＞TTI _TCH2＞TTI _TCH3＞TTI _TCH4, supposing has a following TFC among the TFCS of UE:

{TF _TCH1?TF _TCH2?TF _TCH3?TF _TCH4}

According to " TTI constraint " recited above, must also have following 3 TFC among the TFCS so:

{TF _TCH1?TF _TCH2?TF _TCH3?0}

{TF _TCH1?TF _TCH2?0 0}

{TF _TCH1?0 0 0}

The reason that " TTI constraint " occurs can description below: the transformat of transmission channel is unalterable in the time at TTI, so the transmission channel that has longer TTI its TTI in the duration other transformat that has the transmission channel of less TTI probably change into 0, " TTI constraint " guaranteed that the TFC after this change remains the part of TFCS.

The configuration of TFCS also is subjected to the restriction (concrete visible 3GPP25.306 agreement) of the wireless access capability of UE simultaneously, and the ability of one of them UE is exactly the TFC maximum quantity of supporting simultaneously.If therefore greater than the quantity of supporting in the UE ability, such TFCS configuration is exactly illegal for UE to the quantity of the TFC among the TFCS of UE in configuration.

Therefore we just need a kind of like this TFCS collocation method: each TFC among the TFCS that this method disposed satisfies " TTI constraint ", and the TFC quantity among this TFCS is smaller or equal to corresponding quantity in the UE wireless access capability.In some cases, these two requirements are contradiction: " TTI constraint " can require to increase the quantity of TFC, and the restriction in the UE ability may require to reduce the quantity of TFC.

A collocation method that simply meets above principle is exactly only to dispose the TFCS minimal set to UE, but just can't make full use of Radio Resource like this, because the TFC among this TFCS makes UE constantly have only a transmission channel carrying out transfer of data at any one.

Summary of the invention

The objective of the invention is to propose a kind of WCDMA of being used for system carries out the TFCS configuration for UE method, the requirement for maximum TFC quantity is satisfied in TTI constraint and the UE ability in the TFCS configuration that obtains with this method simultaneously, and can preserve TFC as much as possible among the TFCS.

Technical scheme of the present invention is:

1.1 the TFS to all transmission channels arranges entirely, tries to achieve TFCS;

Whether surpassed the quantity that to support in the UE ability 1.2 judge the TFC quantity among the complete or collected works; If enter next step; If not, export current TFCS as a result of;

1.3 obtain having among the current TFCS minimum TTI value in the transmission channel of non-0TF;

1.4 from current TFCS, select this TTI value corresponding TF non-0 TFC and with it the deletion, change step 1.2 over to.

In such scheme, described step 1.3 comprises:

2.1 the difference of the TFC number of the maximum that quantity among the calculating complete or collected works and UE can support promptly needs the transformat combination number of deleting;

2.2 2 set are set, promptly gather 1 and the set 2;

2.3 obtain the TFC minimal set among the current TFCS, and this minimal set put into set 2;

2.4 the remainder of removing minimal set among the TFCS complete or collected works is put into set 1;

2.5 obtain the Transmission Time Interval TTI value of the pairing minimum of all non-NULL transformat TF in the set 1;

Described step 1.4 comprises:

3.1 select a transformat combination TFC 1 from gathering;

3.2 whether the TTI value is 0 for the TF of the transmission channel collection of minimum interval entirely among the TFC that judgement is selected, if gravity treatment if not, changes next step over to;

3.3 from gathering the current TFC of deletion 1;

3.4 judging needs whether the transformat combination number of deletion is 0; If, with set 1 and set 2 union as the output result; If not, change step 2.5 over to.

From technique scheme as can be seen, core of the present invention is: at first by all transmission channels are arranged entirely, obtain the TFCS complete or collected works.If the quantity of the TFC among these complete or collected works has surpassed the quantity of supporting in the UE ability then, then these complete or collected works are deleted.It is TFC of deletion at every turn, and guarantees the part of the none other than any TFC of this TFC " TTI constraint ".And have minimum TTI in the transmission channel of non-0TF among the TFC that the key of accomplishing this point guarantees to be deleted also is minimum TTI among the whole TFCS.

Utilize the present invention can obtain best TFCS configuration, the restriction to maximum TFC quantity is not only satisfied in TTI constraint and the UE wireless access capability in this configuration, and it is many to make that TFC quantity among the TFCS is tried one's best, like this can so that obtain high-transmission efficient may reach maximum.

Description of drawings

Fig. 1 has described the notion of transmission channel and transfer of data thereof;

Fig. 2 is a method flow diagram of the present invention;

Fig. 3 is the flow chart of a specific embodiment of the present invention.

Embodiment

Fig. 2 has described technical scheme flow process of the present invention, comprising:

1.1 the TFS to all transmission channels arranges entirely, tries to achieve TFCS, as 101 among the figure;

Whether surpassed the quantity that to support in the UE ability 1.2 judge the TFC quantity among the complete or collected works, as 102 among the figure; If enter next step; If not, export current TFCS as a result of, as 105 among the figure;

1.3 obtain having among the current TFCS minimum TTI value in the transmission channel of non-0TF, as 103 among the figure;

1.4 from current TFCS, select this TTI value corresponding TF non-0 TFC and with it the deletion, as 104 among the figure; Then, change step 1.2 over to.

Fig. 3 is the flow chart of one embodiment of the present of invention.As shown in Figure 3:

1, the TFS to all transmission channels arranges entirely, tries to achieve the TFCS complete or collected works;

2, calculate the quantity TFC_Num of the TFC among the above-mentioned TFCS;

If " Maximum number of TFC " in 3 TFC_Num＜UE ability illustrates that this TFCS has met the UE Capability Requirement, to export current TFCS and also this TFCS is disposed to UE as configuration result, this flow process successfully finishes;

If " Maximum number of TFC " in 4 TFC_Num＞UE ability, then establishing the two difference is TFC_Num_Diff;

5,2 set: Set1 and Set2 are set;

6, obtain TFC minimal set among the TFC complete or collected works, and this minimal set is put into Set2;

7, the remainder of removing minimal set among the TFCS complete or collected works is put into Set1;

8, ask for the TTI value of the pairing minimum of all non-NULL TF among the Set1: TTI_Min;

9, from Set1, select a TFC (system of selection can be selective sequential, also can be based on the selection of certain principle, can also be based on other modes and select);

If the TTI value is not 0 for the TF of the transmission channel collection of TTI_Min entirely among the 10 current TFC, change next step; Otherwise, forward step 10 to;

11, the current TFC of deletion from Set1;

12、TFC_Num_Diff＝TFC_Num_Diff-1；

If 13 TFC_Num_Diff=0 illustrate that the TFC number meets the requirements, finish the configuration of TFC quantity, the union of Set1 and Set2 is as output TFCS, and this TFCS is disposed to UE, and this flow process successfully finishes; Otherwise, forward step 9 to.

Provide a concrete example below again:

Consider that a UE has 3 transmission channel TCH1, TCH2 and TCH3, wherein the TTI of TCH1 is 20ms, and the TTI of TCH2 is 40ms, and the TTI of TCH3 is 80ms.The TFS of TCH1 has 3 TF:[0, TF1, TF2], the TFS of TCH2 has 3 TF:[0, TF3, TF4], the TFS of TCH1 has 3 TF:[0, TF5, TF6], and have following relation between the hypothesis TF: TF1＜TF2＜TF3＜TF4＜TF5＜TF6.The wireless access capability of this UE has limited among its TFCS simultaneously can only 16 TFC at most.Below we will be the suitable TFCS of UE configuration with the method that proposes among the present invention.

1, at first ask for the full arrangement of the TFS of each transmission channel, obtain the TFCS complete or collected works:

{0，0，0}，{0，0，TF5}，{0，0，TF6}

{0，TF3，0}，{0，TF3，TF5}，{0，TF3，TF6}

{0，TF4，0}，{0，TF4，TF5}，{0，TF4，TF6}

{TF1，0，0}，{TF1，0，TF5}，{TF1，0，TF6}

{TF1，TF3，0}，{TF1，TF3，TF5}，{TF1，TF3，TF6}

{TF1，TF4，0}，{TF1，TF4，TF5}，{TF1，TF4，TF6}

{TF2，0，0}，{TF2，0，TF5}，{TF2，0，TF6}

{TF2，TF3，0}，{TF2，TF3，TF5}，{TF2，TF3，TF6}

{TF2，TF4，0}，{TF2，TF4，TF5}，{TF2，TF4，TF6}

2, the TFC quantity among the above TFCS complete or collected works is 27, and this is greater than the restriction in the UE ability, so we need therefrom delete 27-16=11 TFC.

3, set up 2 S set et1 and Set2.

4, the TFCS minimal set among the TFCS complete or collected works is put into Set2, minimal set comprises following TFC:

0,0,0}, 0,0, TF5}, 0, TF3,0} and { TF1,0,0}

5, the remainder of removing minimal set among the TFCS complete or collected works is put into Set1, promptly following TFC:

{0，0，TF6}，{0，TF3，TF5}，{0，TF3，TF6}

{0，TF4，0}，{0，TF4，TF5}，{0，TF4，TF6}

{TF1，0，TF5}，{TF1，0，TF6}，{TF1，TF3，0}

{TF1，TF3，TF5}，{TF1，TF3，TF6}，{TF1，TF4，0}

{TF1，TF4，TF5}，{TF1，TF4，TF6}，{TF2，0，0}

{TF2，0，TF5}，{TF2，0，TF6}，{TF2，TF3，0}

{TF2，TF3，TF5}，{TF2，TF3，TF6}，{TF2，TF4，0}

{TF2，TF4，TF5}，{TF2，TF4，TF6}

6, the TTI value TTI_Min=20ms of the pairing minimum of all non-NULL TF, the i.e. TTI of transmission channel 1 among the Set1;

7, according to the present invention, we need select the TFC deletion of the corresponding TF non-0 of TTI=20ms, that is to say the TFC deletion that needs to select transmission channel 1 corresponding TF non-0.Here, we select the minimum TFC deletion of those total data transmitted bits (as described in the invention flow process, the selection principle here is also not exclusive, but all is encompassed within the scope of the invention);

8, by mentioned above principle, TFC{TF2,0, the selected deletion of 0};

9, same principle, we can also delete following TFC successively:

{TF1，TF3，0}，{TF1，TF4，0}，{TF1，0，TF5}，{TF1，0，TF6}，

{TF2，TF3，0}，{TF2，TF4，0}，{TF2，0，TF5}，{TF2，0，TF6}，

{TF1，TF3，TF5}，{TF1，TF4，TF5}

10, we just can get the TFCS (union of Set1 and Set2) of output to the end like this, wherein comprise following TFC:

{0，0，0}，{0，0，TF5}，{0，0，TF6}

{0，TF3，0}，{0，TF3，TF5}，{0，TF3，TF6}

{0，TF4，0}，{0，TF4，TF5}，{0，TF4，TF6}

{TF1，0，0}，{TF1，TF3，TF6}，{TF1，TF4，TF6}，

{TF2，TF3，TF5}，{TF2，TF3，TF6}，{TF2，TF4，TF5}

{TF2，TF4，TF6}

Can prove that the TFCS configuration result that we obtain satisfies TTI constraints fully, and the quantity of TFC wherein also satisfies the requirement in the UE wireless access capability.We also remain TFC as much as possible simultaneously, have guaranteed the efficiency of transmission on the wireless physical channel.

Claims (3)

1, a kind of broadband CDMA system transmission format combination configuring method may further comprise the steps:

1.1 the transmission format set to all transmission channels is arranged entirely, tries to achieve transformat combination complete or collected works (101);

Whether surpassed the quantity (102) that to support in the UE capability 1.2 judge the transformat combination quantity among the complete or collected works; If enter next step; If not, export current transport format combination set as a result of (105);

1.3 obtain having among the current transformat combination complete or collected works minimum time interval value (103) in the transmission channel of non-NULL transformat;

1.4 from current transformat combination complete or collected works' transport format combination set, select this TTI value corresponding TF non-0 the TFC transformat combination and with it the deletion (104), change step 1.2 over to.

2, the described broadband CDMA system transmission format combination configuring method of claim 1 is characterized in that described step 1.3 comprises:

2.1 the difference of the transformat combination number of the maximum that quantity among the calculating complete or collected works and subscriber equipment can be supported promptly needs the transformat combination number of deleting;

2.2 2 set are set, promptly gather 1 and the set 2;

2.3 obtain the transformat combination minimal set among the current transformat combination complete or collected works, and this minimal set put into set 2;

2.4 the remainder of removing minimal set among the transformat combination complete or collected works is put into set 1;

2.5 obtain the Transmission Time Interval TTI value of the pairing minimum of all non-NULL transformats in the set 1.

3, claim 1 or 2 described broadband CDMA system transmission format combination configuring methods is characterized in that described step 1.4 comprises:

3.1 select a transformat combination 1 from gathering;

3.2 whether the TTI value is 0 for the transformat of the transmission channel collection of minimum interval entirely in the transformat combination that judgement is selected, if gravity treatment if not, changes next step over to;

3.3 from gathering the current transformat combination of deletion 1;

3.4 judging needs whether the transformat combination number of deletion is 0; If, with set 1 and set 2 union as the output result; If not, change step 2.5 over to.

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