CN100547957C - The scrambler differentiating method of time-division-synchronization code multi-address division system and code word division methods - Google Patents

Abstract

The present invention is a kind of scrambler differentiating method and code word division methods of time-division-synchronization code multi-address division system, this method comprises: at first, compound respectively to each scrambler in the time-division-synchronization code multi-address division system and orthogonal variable spreading factor sign indicating number, generate compound key, and the compound key of each scrambler and the compound key of another scrambler are carried out correlation calculations in twos; Then, will meet branch set condition scrambler according to correlativity calculation result is divided in the different scrambler groupings; According to this scrambler grouping the code word of time-division-synchronization code multi-address division system is divided into groups again, the interference problem that the feasible network planning that utilizes this group result to carry out can avoid correlation to bring, also can not change the range of choice of scrambler, thereby obtain the good network program results.Utilize method provided by the present invention, can improve the scrambler search speed, save scrambler search time and promote network capacity.

Description

The scrambler differentiating method of time-division-synchronization code multi-address division system and code word division methods

Technical field

The present invention relates to the code word group technology in code division multiple access (CDMA) mobile communication system, the scrambler differentiating method and the code word division methods of particularly a kind of Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system.

Background technology

The 3rd third-generation mobile communication system has extensively adopted the access mode based on CDMA, and its essential characteristic is exactly to distinguish different users with different code words.In order to realize the beehive net structure, different cdma systems has all defined different separately code words and has used and allocative decision, to be implemented in the different user of difference in the beehive net structure.

Wherein, the employed sign indicating number of TD-SCDMA system can be divided into by type: downlink frequency pilot code, ascending pilot frequency sign indicating number, cell scrambling, training sequence (midamble) sign indicating number.The corresponding relation of downlink frequency pilot code, ascending pilot frequency sign indicating number, scrambler and basic midamble intersymbol is referring to table 1.

Table 1

As shown in table 1, downlink frequency pilot code one has 32, is used for the down-going synchronous and the Cell searching of TD-SCDMA system; Ascending pilot frequency sign indicating number one has 256, is used for the uplink synchronous of TD-SCDMA system and access at random; Scrambler has 128, and each scrambler is respectively applied for data symbol sequence and multiplies each other, and makes data symbol sequence present more pseudorandom permutation characteristic, thereby can be used for sign and distinguish neighbor cell; The quantity of basic midamble sign indicating number also is 128, is used to estimate channel response.In actual applications, the ascending pilot frequency sign indicating number is used in random access procedure by subscriber equipment (UE), the employed downlink frequency pilot code of the ascending pilot frequency sign indicating number of each sub-district and sub-district has certain corresponding relation, corresponding 8 the ascending pilot frequency sign indicating numbers of downlink frequency pilot code, each sub-district is after downlink frequency pilot code is determined, can from 4 scramblers of each downlink frequency pilot code correspondence, select a scrambler as this sub-district, so also just determined simultaneously corresponding basic midamble sign indicating number, the midamble sign indicating number of different channels is to be produced according to certain skew by basic midamble sign indicating number in the sub-district.Also comprise long (OVSF) spreading code of orthogonal variable at the employed sign indicating number of TD-SCDMA system, this OVSF spreading code is used for distinguishing the different channel of same signal source, and the compound resulting complex data sequence in back that multiplies each other of OVSF spreading code and scrambler is called compound key.

In the prior art, referring to table 1, the code character grouping scheme of 3GPP is grouped into the basis with downlink frequency pilot code (DwPTS), according to the grouping of downlink frequency pilot code and then realize grouping to all the other code words that comprise scrambler, utilize this group result to carry out the network planning then, its network planning layoutprocedure is as follows:

Step 1: based on the grouping of downlink frequency pilot code, be the suitable downlink frequency pilot code of cell selecting, according to the relation of the grouping shown in the table 1, determine corresponding scrambler group then by the downlink frequency pilot code of selecting to obtain;

Step 2: in determined scrambler code character, select suitable scrambler and basic Midamble sign indicating number;

Step 3: the UpPTS that selects suitable quantity.

Though the planing method of the prior art can guarantee the DwPTS difference between neighbor cell, but the program results that adopts this kind planing method do not consider correlation between the compound code word that selected scrambler and spreading code be composited the stronger mutual interference mutually that may bring, may cause the work code channel of adjacent two sub-districts to produce strong interference each other, thereby make network configuration can not reach optimum; For example, select two different DwPTS and two groups of different code characters respectively for neighbor cell A and B through step 1 after, in step 2, from code character, select scrambler respectively for sub-district A and sub-district B, owing to may have stronger mutual interference mutually between this scrambler and the compound key that spreading code is composited, thereby make and produce strong jamming between neighbor cell work code channel.The reason that produces this kind interference is: the relativity problem between the compound key of not considering scrambler and spreading code be composited in network planning process, 128 scramblers are not distinguished, cause the employed compound code word of neighbor cell to have strong correlation, can't avoid the appearance of the interference that causes owing to correlation.

In the prior art, in order to solve the interference problem of as above bringing owing to the correlation between the compound key, can in carrying out above-mentioned steps 2, consider the relativity problem between the compound key, thereby the generation that avoids interference, but, owing in step 1, determined the scrambler group, therefore, this consideration relativity problem and the selection scrambler that carries out can only carry out within the scope of selected scrambler group, thereby since the scrambler group really fixed limit system possible better scrambler select, thereby make network configuration can not reach optimum;

If in network planning process, on the basis of uncertain scrambler code character, directly consider the problem of correlation and select suitable scrambler, then because the quantity of scrambler is 128, the quantity 32 that is higher than the scrambler code character far away, therefore, from 128 scramblers, directly carry out the scrambler selection and can cause network planning search procedure to prolong greatly, thereby be unsuitable for the application of network planning engineering site.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of scrambler differentiating method and code word division methods of time-division-synchronization code multi-address division system, thereby can utilize this method that a kind of differentiation group result of considering the relativity problem between the compound key that scrambler and spreading code be composited and 128 scramblers being distinguished is provided, utilize the differentiation group result of this method to carry out the code word division, can solve the interference problem that the compound key correlation is brought, and can in the determined code character scope of this method, carry out scrambler and select, thereby neither dwindle the range of choice of scrambler, also can not prolong network planning search time.

For achieving the above object, the invention provides a kind of scrambler differentiating method of time-division-synchronization code multi-address division system, this method comprises:

Steps A: the orthogonal variable spreading factor sign indicating number to each scrambler in the time-division-synchronization code multi-address division system and spreading factor SF=16 is formed compound key respectively, and the compound key of each scrambler and the compound key of another scrambler are carried out correlation calculations in twos;

Step B: according to the result of calculation of the correlation calculations of steps A:

Judge and whether have following relation between the compound key of per two scramblers: the relevant mould value of a compound key in compound key in 16 compound keys of a scrambler and 16 compound keys of another scrambler is 16, and is 0 with the relevant mould value of other 15 compound keys of described another scrambler; If, then these two scramblers are divided in the same scrambler grouping with same equivalent relation, according to as upper type, the scrambler that will meet this Rule of judgment is divided in different scramblers divides into groups; Perhaps,

Judge between the compound key of per two scramblers and whether have following relation: it is 8 with 4 code words relevant mould value each other of described another scrambler that 4 code words are arranged in 16 compound keys of a described scrambler, and is 0 with other 12 code words relevant mould value each other of described another scrambler; If, then these two scramblers are divided in the grouping of same scrambler, according to as upper type, the scrambler that will meet this Rule of judgment is divided in different scramblers divides into groups; Perhaps,

Judge between the compound key of per two scramblers and whether have following relation: 16 compound keys of a described scrambler are 4 with the relevant mould value of 16 compound keys of described another scrambler; If, then these two scramblers are divided in the grouping of same scrambler, according to as upper type, the scrambler that will meet this Rule of judgment is divided in different scramblers divides into groups.

Wherein, steps A comprises:

Make up a form with 16 row and 16 row, the corresponding respectively scrambler of horizontal 16 row and 16 compound respectively compound keys that obtain of spreading code of this form, corresponding respectively another scrambler of vertical 16 row and 16 compound respectively compound keys that obtain of spreading code of this form, calculate the cross-correlation mould value of horizontal and vertical compound key, and the cross-correlation mould value that obtains is inserted the intersection point place of the corresponding row and column of this table as correlativity calculation result, described 128 scramblers all carry out aforementioned calculation in twos, obtain correlativity calculation result.

Wherein, among the step B, the relevant mould value of a compound key in compound key in 16 compound keys of a described scrambler and 16 compound keys of another scrambler is 16, and is 0 to be with the relevant mould value of other 15 compound keys of described another scrambler:

A compound key cross-correlation mould value all occurring in each row in the form is 16, and the cross-correlation mould value of all the other 15 compound keys is 0; With, a compound key cross-correlation mould value all occurring in each row in the table is 16, and the cross-correlation mould value of all the other 15 compound keys is 0.

Wherein, among the step B, it is 8 with 4 code words relevant mould value each other of described another scrambler that 4 code words are arranged in 16 compound keys of a described scrambler, and is 0 to be with other 12 code words relevant mould value each other of described another scrambler:

The mutual cross-correlation mould value of 4 code words in the form in 4 of arbitrary horizontal code character code words and the vertical code character be 8 and with the cross-correlation mould value of other 12 vertical code words be 0; Wherein, horizontal 16 code words in this table are divided into 4 groups, every group of 4 code words; Vertical 16 code words are divided into 4 groups, every group of 4 code words, and packet mode is relevant with the correlativity calculation result that calculates.

Wherein, among the step B, 16 compound keys of a described scrambler are 4 with the relevant mould value of 16 compound keys of described another scrambler and are:

The cross-correlation mould value of horizontal and vertical compound key is 4 in the form.

The present invention also provides a kind of code word division methods of time-division-synchronization code multi-address division system, and this method comprises:

Steps A: the orthogonal variable spreading factor sign indicating number to each scrambler in the time-division-synchronization code multi-address division system and spreading factor SF=16 is compound respectively, generates compound key, and the compound key of each scrambler and the compound key of another scrambler are carried out correlation calculations in twos;

Step B: according to the result of calculation of the correlation calculations of steps A:

Judge and whether have following relation between the compound key: the relevant mould value of a compound key in compound key in 16 compound keys of a scrambler and 16 compound keys of another scrambler is 16, and is 0 with the relevant mould value of other 15 compound keys of described another scrambler; If, then with this compound key corresponding respectively scrambler be divided in the same scrambler grouping with same equivalent relation, according to as upper type, the scrambler that will meet this Rule of judgment is divided in different scramblers divides into groups;

Step C: the scrambler grouping that utilizes step B to obtain, and code character grouping scheme in the time-division-synchronization code multi-address division system standard, downlink frequency pilot code is divided into groups again, thereby obtain new code word and divide the result, this code word is divided among the result, and each in this scrambler grouping is organized corresponding one group of downlink frequency pilot code.

Wherein, step C comprises:

Step C1: from each different scrambler grouping, select a scrambler respectively with same equivalent relation, selected scrambler does not belong to the same scrambler code character of time-division-synchronization code multi-address division system standard code character grouping scheme between any two, each selected scrambler as basic scrambler, is constituted a scrambler base by selected basic scrambler;

Step C2: by determined scrambler base downlink frequency pilot code is divided into groups again, divide the result, the corresponding one group of downlink frequency pilot code of each basic scrambler thereby obtain new code word.

Wherein, step C1 comprises:

Step C11: as first group, from this first group, select a scrambler as basic scrambler with a described scrambler grouping with same equivalent relation;

Step C12: divide into groups as second group with another scrambler with same equivalent relation, from this second group, select another scrambler as basic scrambler, wherein, this another scrambler is different from this scrambler among the described step C11, and with step C11 in this scrambler belong to different scrambler code character in the time-division-synchronization code multi-address division system standard respectively; According to this step, from 12 scrambler groupings, select a basic scrambler respectively, form the scrambler base.

Wherein, in step C1, described scrambler base is at least one.

Wherein, among the step C12, scrambler of described selection comprises as basic scrambler:

Step C121: from a code character that is different from the own code character of selecting, select a scrambler;

Step C122: judge that whether this selected scrambler and the scrambler selected be two scramblers in the same scrambler code character in the time-division-synchronization code multi-address division system standard grouping scheme, if, then return step C121, in step C121, reselect a new scrambler in the current selected code character, otherwise, execution in step C123;

Step C123: with selected scrambler as described basic scrambler.

Wherein, in step C12, if in this second group, can't find with step C11 in selected this scrambler belong to the scrambler of the different scrambler code character in the grouping scheme of time-division-synchronization code multi-address division system standard respectively, then this method further comprises:

Return step C11, in first group described in the step C11, select new scrambler and then execution in step C12.

Wherein, step C2 comprises:

Step C21: each the basic scrambler in the selected scrambler base among the step C1 is identified, and each basic scrambler has unique separately identifier respectively;

Step C22: to be the determined identifier of each basic scrambler among the step C21, identify the scrambler grouping that this each basic scrambler originally belonged to, thereby obtain scrambler grouping based on basic scrambler;

Step C23:, adopt each scrambler in the grouping of basic scrambler identifier sign time-division-synchronization code multi-address division system scrambler according to the scrambler grouping of step C22 based on basic scrambler;

Step C24: based among the step C23 to the sign again of scrambler, search pairing all downlink frequency pilot code of each basic scrambler sign respectively, then, divide into groups based on basic scrambler, obtain the downlink frequency pilot code of each basic scrambler correspondence, divide the result thereby realize obtaining new code word.

Wherein, step C comprises:

Each group in the scrambler grouping that obtains among the identification of steps B respectively, each group has unique separately identifier respectively, according to the group result after the sign, and with reference to the corresponding relation between scrambler and the downlink frequency pilot code in the time-division-synchronization code multi-address division system standard, determine to obtain scrambler that each identifier the identifies pairing downlink frequency pilot code of dividing into groups, divide the result thereby obtain new code word.

As seen, the present invention considers the relativity problem between the compound key that scrambler and spreading code be composited and 128 scramblers is distinguished, utilize the differentiation group result of this method to carry out the code word division, make and in carrying out network planning process, can consider the interference problem that the compound key correlation is brought that concrete application of the present invention has following beneficial effect:

1,, can effectively avoid between neighbor cell because issuable strong jamming when distributing scrambler the lifting network capacity based on the grouping of the scrambler of basic scrambler;

2, the scrambler quantity of basic scrambler quantity in the TD-SCDMA system specifications, make the scrambler quantity that in system emulation, the network planning or other relate to the work of scrambler search, participates in search reduce, effectively the scrambler search speed is improved in restriction scrambler hunting zone, saves scrambler search time.

Description of drawings

Fig. 1 is for realizing flow chart of the present invention.

Fig. 2 is for realizing the flow chart of step 103 in one embodiment of the invention.

Embodiment

The present invention is a kind of scrambler differentiating method and code word division methods of time-division-synchronization code multi-address division system, and the relativity problem that this method is considered compound key divides into groups 128 scramblers in the TD-SCDMA system again, thereby 128 scramblers are realized distinguishing; Utilize this differentiation result, can access basic scrambler, according to basic scrambler and then obtain the scrambler base, according to the relation of resulting scrambler base and downlink frequency pilot code each downlink frequency pilot code is divided into groups respectively to corresponding scrambler base again, thereby obtain new code word and divide the result, make that utilizing this code word to divide the result can reach the interference problem of avoiding the compound key correlation and bringing, and can not prolong the network planning purpose of search time again.

Describe the present invention below in conjunction with accompanying drawing.

Realize that the present invention needs following steps at least:

Steps A: compound respectively to each scrambler in the TD-SCDMA system and orthogonal variable spreading factor sign indicating number, generate compound key, and the compound key of each scrambler and the compound key of another scrambler are carried out correlation calculations in twos;

Step B: according to the result of calculation of the correlation calculations of steps A, each scrambler is divided in respectively in the corresponding same scrambler grouping, each scrambler is distinguished by each different same scrambler grouping.

Specific implementation to above steps A and step B is elaborated below:

(1) specific implementation of steps A:

The scrambler of TD-SCDMA system is 128, makes up by the spreading code with 16 SF=16, can obtain 2048 compound keys altogether.Cross correlation between these compound keys has nothing in common with each other, through discovering, under the situation of considering the channel delay diffusion fully synchronously and not, cross-correlation mould value between the compound key has four kinds of situations such as 0,4,8,16, be the described correlation calculations of performing step A, the present invention at first makes up the table of form shown in the table 2, by the described correlation calculations of table performing step A of this kind form and the expression of correlativity calculation result; In the form of this kind form, 16 compound keys that the spreading code of a horizontal scrambler of 16 row expression correspondence respectively and 16 SF=16 is composited respectively, 16 compound keys that the spreading code of vertical 16 row another scrambler of expression correspondence respectively and 16 SF=16 is composited respectively, value in the form is exactly the cross-correlation mould value of the compound key formed with the OVSF spreading code of SF=16 respectively of two scramblers, with the result of calculation of this cross-correlation mould value as correlation calculations;

Utilize the table of this kind form, the specific implementation steps A comprises:

Appoint in 128 scramblers from the TD-SCDMA system and get two scramblers respectively as the horizontal and vertical pairing scrambler in this table, then, these two scramblers respectively with 16 compound compound keys that obtain separately of spreading code, calculate the cross-correlation mould value of horizontal and vertical compound key, and the cross-correlation mould value that obtains is inserted the intersection point place of the corresponding row and column of this table as correlativity calculation result; 128 scramblers all carry out aforementioned calculation in twos, obtain correlativity calculation result.

Because the computational methods of cross correlation are that the cross-correlation mould value that obtains respectively in 16 chip is sued for peace, therefore peaked absolute value is 16, cross-correlation mould value also may occur and be 8 and 4 situation; Wherein, cross-correlation mould value occurs and be 16 expressions: two compound keys that two scramblers and spreading code are composited respectively are the sign indicating number with same equivalent features, and these two scramblers are equivalent relation each other; Compound key is that the sign indicating number with same equivalent features means: if neighbor cell has distributed the scrambler with their cross correlation shown in the table 2 respectively, may produce very strong mutual interference mutually between this scrambler and the compound key that spreading code is composited, because this interference, then each channel code in sub-district all may exist one to have strongly disturbing channel code in neighbor cell, and will cause the loss of capacity between neighbor cell this moment.Therefore, if two scramblers have relation as shown in table 2, it is 16 situation that there is cross-correlation mould value in its compound key, then claims these two scramblers to have same equivalent relation;

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
																	1	0	0	0	0	0	0	0	0	0	0	0	16	0	0	0	0
2	0	0	0	0	0	0	0	0	0	0	16	0	0	0	0	0
																	3	0	0	0	0	0	0	0	0	0	16	0	0	0	0	0	0
4	0	0	0	0	0	0	0	0	16	0	0	0	0	0	0	0
																	5	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	16
6	0	0	0	0	0	0	0	0	0	0	0	0	0	0	16	0
																	7	0	0	0	0	0	0	0	0	0	0	0	0	0	16	0	0
8	0	0	0	0	0	0	0	0	0	0	0	0	16	0	0	0
																	9	0	0	0	16	0	0	0	0	0	0	0	0	0	0	0	0
10	0	0	16	0	0	0	0	0	0	0	0	0	0	0	0	0
																	11	0	16	0	0	0	0	0	0	0	0	0	0	0	0	0	0
12	16	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
																	13	0	0	0	0	0	0	0	16	0	0	0	0	0	0	0	0
14	0	0	0	0	0	0	16	0	0	0	0	0	0	0	0	0
																	15	0	0	0	0	0	16	0	0	0	0	0	0	0	0	0	0
16	0	0	0	0	16	0	0	0	0	0	0	0	0	0	0	0

Table 2

(2) specific implementation of step B:

In the present invention, whether performing step B need situation shown in the table 2 occur according to the correlativity calculation result of steps A in the table of form described in the determining step A, and promptly the cross-correlation mould value of the compound code word of two scramblers may be 16.If pairing two scramblers are divided in the same scrambler grouping with this same equivalent relation in then will showing as two scramblers with same equivalent relation; Repeat this step, the scrambler that will meet this Rule of judgment is divided in the different scrambler groupings; The process of performing step B is as follows:

In table 2, the position of above-mentioned characteristic value appears in the compound key cross-correlation mould value between different scrambling codes in table 2 can be different, the feature that the position that is occurred does not influence this table 2 is embodied, the feature that table 2 embodied can reduce: a compound key cross-correlation mould value all can occur in each row in the table is 16, and the cross-correlation mould value of all the other 15 compound keys is 0; Also all there is aforesaid feature for each row in this table; Satisfy the feature shown in the table 2 if this steps A is carried out the resulting result of calculation of correlation calculations to compound key, be divided in pairing two scramblers in this table in the scrambler grouping with this same equivalent relation as two scramblers with same equivalent relation; All the other scrambler correlativity calculation result in twos according in the scrambler of TD-SCDMA system repeat this step, all divide into groups to finish until the scrambler to the TD-SCDMA system; In the present invention, as shown in table 3 according to the cross-correlation mould value of the more above-mentioned compound keys differentiation result that to be the 16 correlation forms of expression that showed distinguish the scrambler of TD-SCDMA system:

Table 3

Except being the 16 correlation forms of expression that showed are distinguished the scrambler of TD-SCDMA system according to the cross-correlation mould value according to some compound keys as mentioned above, the present invention also can be further is that the 8 or 4 correlation forms of expression that showed are distinguished the scrambler of TD-SCDMA system according to the cross-correlation mould value of some compound keys, specifically comprises:

With respect to cross-correlation mould value is 16, and cross-correlation mould value is that 8 expression interference among adjacent cells are less relatively, and cross-correlation mould value is that 4 expression interference among adjacent cells are littler relatively;

One, the cross-correlation mould value according to some compound keys is that the 8 correlation forms of expression that showed are distinguished the scrambler of TD-SCDMA system:

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
																	1	0	8	0	0	0	0	8	0	8	0	0	0	0	0	0	8
2	8	0	0	0	0	0	0	8	0	8	0	0	0	0	8	0
																	3	0	0	0	8	8	0	0	0	0	0	8	0	0	8	0	0
4	0	0	8	0	0	8	0	0	0	0	0	8	8	0	0	0
																	5	0	0	8	0	0	8	0	0	0	0	0	8	8	0	0	0
6	0	0	0	8	8	0	0	0	0	0	8	0	0	8	0	0
																	7	8	0	0	0	0	0	0	8	0	8	0	0	0	0	8	0
8	0	8	0	0	0	0	8	0	8	0	0	0	0	0	0	8
																	9	8	0	0	0	0	0	0	8	0	8	0	0	0	0	8	0
10	0	8	0	0	0	0	8	0	8	0	0	0	0	0	0	8
																	11	0	0	8	0	0	8	0	0	0	0	0	8	8	0	0	0
12	0	0	0	8	8	0	0	0	0	0	8	0	0	8	0	0
																	13	0	0	0	8	8	0	0	0	0	0	8	0	0	8	0	0
14	0	0	8	0	0	8	0	0	0	0	0	8	8	0	0	0
																	15	0	8	0	0	0	0	8	0	8	0	0	0	0	0	0	8
16	8	0	0	0	0	0	0	8	0	8	0	0	0	0	8	0

Table 4

Through after the as above described cross-correlation calculation of steps A, judge in step B and whether have the following feature shown in the table 4 in the described table: the mutual relevant mould value of 4 code words of horizontal arbitrary code character and 4 code words in vertical a certain code character is 8, mutually orthogonal with all code words in other vertical code characters, if, then corresponding scrambler is divided in the same scrambler grouping, according to as upper type, the scrambler that will meet this Rule of judgment is divided in the different scrambler groupings; Wherein, in table 4, horizontal 16 code words can be divided into 4 buttons, every group of 4 code words: { 1,8,10, and 15}, 2,7,9,16}, { 3,6,12,13}, { 4,5,11,14}, vertical 16 code words are divided into 4 groups, every group of 4 code words: { 1,8,10,15}, 2,7,9,16}, { 3,6,12, and 13}, 4,5,11,14}; Wherein, packet mode is relevant with the correlativity calculation result that calculates; Among the present invention, the differentiation result that to be the 8 correlation forms of expression that showed distinguish the scrambler of TD-SCDMA system is as shown in table 5 according to the cross-correlation mould value of some compound keys, wherein, only 12 rather than 128 scramblers of scrambler quantity in the table 5, only in each row of table 3, select a scrambler to make up table 5 as representative:

1	2 3 9 17 54 56 58
		2	1 9 17 52 54 58 63
3	1 9 17 52 63 64 74
		9	1 2 3 52 63 64 74
17	1 2 3 54 56 64 74
		52	2 3 9 54 56 58 64
54	1 2 17 52 63 64 74
		56	1 17 52 58 63 64 74
58	1 2 52 56 63 64 74
		63	2 3 9 54 56 58 74
64	3 9 17 52 54 56 58
		74	3 9 17 54 56 58 63

Table 5

Two, the cross-correlation mould value according to some compound keys is that the 4 correlation forms of expression that showed are distinguished the scrambler of TD-SCDMA system:

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
																	1	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
2	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
																	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
																	5	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
6	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
																	7	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
8	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
																	9	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
10	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
																	11	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
12	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
																	13	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
14	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
																	15	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
16	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4

Table 6

Through after the as above described cross-correlation calculation of steps A, judge in step B and whether have the following feature shown in the table 6 in the described table: horizontal 16 compound keys are 4 with relevant mould value between vertical 16 compound keys, if, then corresponding scrambler is divided in the same scrambler grouping, according to as upper type, the scrambler that will meet this Rule of judgment is divided in the different scrambler groupings.Among the present invention, the differentiation result that to be the 4 correlation forms of expression that showed distinguish the scrambler of TD-SCDMA system is as shown in table 7 according to the cross-correlation mould value of some compound keys, wherein, only 12 rather than 128 scramblers of scrambler quantity in the table 7, only in each row of table 3, select a scrambler to make up table 7 as representative:

1	52 63 64 74
		2	3 56 64 74
3	2 54 56 58
		9	17 54 56 58
17	9 52 58 63
		52	1 17 63 74
54	3 9 56 58
		56	2 3 9 54
58	3 9 17 54
		63	1 17 52 64
64	1 2 63 74
		74	1 2 52 64

Table 7

Because the strong jamming situation that compound code word cross correlation value is 16 scrambler may be caused is to need situation about avoiding in the CDMA communication, so the scrambler with same equivalent relation shown in the following stated code word division methods his-and-hers watches 2 is distinguished.Being appreciated that if actual needs, can be that 8,4 scrambler is distinguished to cross correlation value with reference to the differentiating method of present embodiment.

Referring to Fig. 1, utilize the differentiation of the present invention to each scrambler, realize that code assignment needs following steps:

Step 101: the scrambler in the TD-SCDMA system is all carried out correlation calculations, each scrambler is divided into different scrambler groupings according to the correlative relationship that its compound key had, and resulting scrambler grouping is called the scrambler grouping with same equivalent relation in this step;

Step 102: according to resulting scrambler grouping in step 101, from this code character, select basic scrambler, constitute the scrambler base by the basic scrambler of selecting with same equivalent relation;

Step 103: by determined scrambler base downlink frequency pilot code is divided into groups again, thereby obtain new code word group result.

Obtain basic scrambler in the present embodiment earlier, and then determine the downlink frequency pilot code that each basic scrambler is corresponding with the relation of downlink frequency pilot code according to scrambler, thereby obtain new code word group result, utilize this group result can simplify calculating: in the network planning, utilize this group result, only need carry out network planning calculating, and need not carry out the calculating of the network planning at 128 scramblers based on 12 basic scramblers.Be appreciated that and also can directly utilize the scrambler grouping that obtains in the step 101, calculate, determine to carry out again after employed scrambler divides into groups the distribution of downlink frequency pilot code based on 12 scrambler grouping carrying out network plannings.So just do not need to judge basic scrambler and obtain the scrambler base that code assignment is carried out in the scrambler grouping with same equivalent relation that directly obtains according to the present invention.

Below the specific implementation of above step is described in detail respectively:

One, the specific implementation of step 101:

After scrambler in the TD-SCDMA system all carried out correlation calculations, can be met that as above table 2 showed, compound key cross-correlation mould value exists for the scrambler grouping of 16 situation, this grouping is as shown in table 3, referring to table 3, the correlation form of expression between the compound key sub-block that any two scramblers in this table in each row constitute and the form of expression shown in the table 2 are equal to, and have the relation of same equivalence in twos between the scrambler;

Two, the specific implementation of step 102:

Referring to table 2 and table 3, the correlation in the table 3 between the compound key sub-block of any two scrambler correspondences of every row can be equal to the correlation form of expression shown in the table 2.Studies show that, any two scramblers of the every row of table 3 have the characteristic that mutual equivalence characterizes, based on this discovery, select the basic scrambler of one group of scrambler of TD-SCDMA system as the TD-SCDMA system, constitute the scrambler base of TD-SCDMA system by basic scrambler, the scrambler of TD-SCDMA system all can be characterized by certain basic scrambler equivalence, and the selection criterion of basic scrambler is as follows:

(1) every row of table 3 has and has only a scrambler as basic scrambler; The reason of working out this criterion is that being unlikely to occur selected basic scrambler has equivalent relation each other, thereby brings the correlation influence;

(2) any two basic scramblers can not belong to the same scrambler code character of the scheme of grouping shown in the table 1; The reason of formulating this criterion is: this grouping scheme should guarantee that the DwPTS of neighbor cell in network planning process differs from one another;

Based on as above criterion, performing step 102 specifically may further comprise the steps:

Step 1021: as first group, from this first group, select a scrambler a as basic scrambler with a group of determined scrambler grouping with same equivalent relation in the step 101;

Step 1022: with this have same equivalent relation scrambler grouping be different from another code character of first group as second group, from this second group, select another scrambler b, carry out then and judge: judge whether a selected scrambler a belongs to two interior scramblers of the same scrambler code character shown in the table 1 in this selected another scrambler b and the step 1021, if, then return this step, in this second group, reselect a new scrambler, until in second group, finding the scrambler that meets Rule of judgment as a basic scrambler; Otherwise, according to this step, from 12 scrambler groupings, select a basic scrambler respectively, form the scrambler base.

Wherein, being judged as that this step is carried out embodies the step that aforesaid basic scrambler selection criterion is carried out, if in this step, each scrambler in this second group is through after the aforesaid judgement, all do not obtain meeting the scrambler of this criterion, then return step 1021, reselect a scrambler, and then execution in step 1022 and subsequent step thereof.

In the present invention, also can further repeat above-mentioned steps 102, thereby select at least two scrambler bases that differ from one another.

Be example with table 3 below, specify the implementation procedure of step 102 with a specific embodiment:

In this specific embodiment, performing step 102 needs following steps:

1, select certain scrambler a as basic scrambler by first row of table 3;

2, select certain scrambler b as basic scrambler at the next line of table 3, require this base scrambler and other arbitrary basic scramblers of having selected all not to be subordinated in the 3GPP standard grouping scheme same group;

3,, return lastrow and select new scrambler as basic scrambler if fail to find qualified scrambler in the step 2; Otherwise execution in step 4;

4, execution in step 2～3, up to finding 12 scramblers that meet basic scrambler selection criterion as basic scrambler, and constitute the scrambler bases with these 12 basic scramblers.

According to as above step, present embodiment is selected 12 basic scramblers, the scrambler base shown in being constructed as follows:

{0，5，11，13，16，51，53，57，60，66，68，73}

In other embodiment of the present invention, also can select other scrambler base according to as above step 102, scrambler base shown here only is descriptive, and should not think that this scrambler base defines protection scope of the present invention;

Three, the realization of step 103, referring to Fig. 2, performing step 103 needs following steps:

Step 1031: each the basic scrambler in the selected scrambler base in the step 102 is identified, and each basic scrambler has unique separately identifier respectively; Referring to table 8, in the embodiment of the invention, adopt A～L that basic scrambler is identified, the corresponding relation ginseng is shown in Table 8:

A	B	C	D	E	F	G	H	I	J	K	L
												0	5	11	13	16	51	53	60	57	68	66	73

Table 8

Wherein, in other embodiment of the present invention, also can adopt other identifier to carry out above-mentioned sign, not influence realization of the present invention;

Step 1032: to be the determined identifier of each basic scrambler in the step 1031, identify the scrambler grouping that this each basic scrambler originally belonged to, thereby obtain scrambler grouping based on basic scrambler; In embodiments of the present invention, this group result is as shown in table 9;

Table 9

Step 1033:, adopt each scrambler in 32 scrambler groupings of basic scrambler identifier sign TD-SCDMA system according to the scrambler grouping of step 1032 based on basic scrambler; For example, basic scrambler identifier A, B, C, the C in 0,1,2, the 3 difference correspondence table 9 of the scrambler in the scrambler group 1.In embodiments of the present invention, sign result ginseng is shown in Table 10;

1	A	B	C	C
					2	A	B	C	B
3	D	D	B	C
					4	C	D	D	B
5	E	C	D	D
					6	B	E	C	C
7	D	A	A	D
					8	A	A	E	E
9	D	A	C	C
					10	C	D	C	A
11	B	A	A	E
					12	D	C	B	B
13	A	B	C	F
					14	A	G	A	H
15	A	I	F	E
					16	H	B	J	K
17	B	C	K	D
					18	J	J	D	H
19	K	L	L	B
					20	J	I	E	K
21	G	I	B	H
					22	A	E	C	H
23	I	A	L	G
					24	E	K	E	K
25	I	I	L	E
					26	G	I	F	L
27	D	E	K	E
					28	J	E	K	L
29	H	K	L	H
					30	D	D	B	L
31	G	L	J	K
					32	E	E	B	F

Table 10

Step 1034: based in the step 1033 to the sign again of scrambler, search pairing all downlink frequency pilot code of each basic scrambler sign, then, divide into groups based on basic scrambler, obtain the downlink frequency pilot code of each basic scrambler correspondence, thereby realize obtaining new code word group result; Particularly, find in the table 10 scrambler at each basic scrambler sign place earlier, as A in scrambler 1,2,7-11,13-15,22,23.0,1,6-10,12-14,21,22 then according to TD-SCDMA system table 1, the downlink frequency pilot code of above-mentioned scrambler correspondence is assigned to a group of this base scrambler sign, as the downlink frequency pilot code of scrambler 1,2,7-11,13-15,22,23 correspondences be:.In embodiments of the present invention, new group result is as shown in table 11;

Table 11

Utilize this group result, in carrying out network planning process, determine basic scrambler earlier,, select downlink frequency pilot code by the relation shown in the table 11, and finally realize the network planning then according to determined basic scrambler.

In other embodiment of the present invention, also can obtain table 11 in the following way: behind the differentiation result that 128 scramblers are distinguished shown in the acquisition table 3, adopt A～L to identify scrambler respectively and distinguish respectively organizing among the result, obtain the group result shown in the table 9, according to the group result after the identifying shown in the table 9, and with reference to the corresponding relation between scrambler and the downlink frequency pilot code in the system specifications of TD-SCDMA shown in the table 1, determine each scrambler that obtains identifying respectively pairing downlink frequency pilot code of dividing into groups, thereby obtain the new group result shown in the table 11 with A～L.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (13)

1, a kind of scrambler differentiating method of time-division-synchronization code multi-address division system is characterized in that, this method comprises:

Steps A: the orthogonal variable spreading factor sign indicating number to each scrambler in the time-division-synchronization code multi-address division system and spreading factor SF=16 is formed compound key respectively, and the compound key of each scrambler and the compound key of another scrambler are carried out correlation calculations in twos;

Step B: according to the result of calculation of the correlation calculations of steps A:

Judge and whether have following relation between the compound key of per two scramblers: the relevant mould value of a compound key in compound key in 16 compound keys of a scrambler and 16 compound keys of another scrambler is 16, and is 0 with the relevant mould value of other 15 compound keys of described another scrambler; If, then these two scramblers are divided in the same scrambler grouping with same equivalent relation, according to as upper type, the scrambler that will meet this Rule of judgment is divided in different scramblers divides into groups; Perhaps,

Judge between the compound key of per two scramblers and whether have following relation: it is 8 with 4 code words relevant mould value each other of described another scrambler that 4 code words are arranged in 16 compound keys of a described scrambler, and is 0 with other 12 code words relevant mould value each other of described another scrambler; If, then these two scramblers are divided in the grouping of same scrambler, according to as upper type, the scrambler that will meet this Rule of judgment is divided in different scramblers divides into groups; Perhaps,

Judge between the compound key of per two scramblers and whether have following relation: 16 compound keys of a described scrambler are 4 with the relevant mould value of 16 compound keys of described another scrambler; If, then these two scramblers are divided in the grouping of same scrambler, according to as upper type, the scrambler that will meet this Rule of judgment is divided in different scramblers divides into groups.

2, method according to claim 1 is characterized in that, steps A comprises:

Make up a form with 16 row and 16 row, the corresponding respectively scrambler of horizontal 16 row and 16 compound respectively compound keys that obtain of spreading code of this form, corresponding respectively another scrambler of vertical 16 row and 16 compound respectively compound keys that obtain of spreading code of this form, calculate the cross-correlation mould value of horizontal and vertical compound key, and the cross-correlation mould value that obtains is inserted the intersection point place of the corresponding row and column of this table as correlativity calculation result, described 128 scramblers all carry out aforementioned calculation in twos, obtain correlativity calculation result.

3, method according to claim 2, it is characterized in that, among the step B, the relevant mould value of a compound key in compound key in 16 compound keys of a described scrambler and 16 compound keys of another scrambler is 16, and is 0 to be with the relevant mould value of other 15 compound keys of described another scrambler:

A compound key cross-correlation mould value all occurring in each row in the form is 16, and the cross-correlation mould value of all the other 15 compound keys is 0; With, a compound key cross-correlation mould value all occurring in each row in the table is 16, and the cross-correlation mould value of all the other 15 compound keys is 0.

4, method according to claim 2, it is characterized in that, among the step B, it is 8 with 4 code words relevant mould value each other of described another scrambler that 4 code words are arranged in 16 compound keys of a described scrambler, and is 0 to be with other 12 code words relevant mould value each other of described another scrambler:

The mutual cross-correlation mould value of 4 code words in the form in 4 of arbitrary horizontal code character code words and the vertical code character be 8 and with the cross-correlation mould value of other 12 vertical code words be 0; Wherein, horizontal 16 code words in this table are divided into 4 groups, every group of 4 code words; Vertical 16 code words are divided into 4 groups, every group of 4 code words, and packet mode is relevant with the correlativity calculation result that calculates.

5, method according to claim 2 is characterized in that, among the step B, 16 compound keys of a described scrambler are 4 with the relevant mould value of 16 compound keys of described another scrambler and are:

The cross-correlation mould value of horizontal and vertical compound key is 4 in the form.

6, a kind of code word division methods of time-division-synchronization code multi-address division system is characterized in that, this method comprises:

Steps A: the orthogonal variable spreading factor sign indicating number to each scrambler in the time-division-synchronization code multi-address division system and spreading factor SF=16 is compound respectively, generates compound key, and the compound key of each scrambler and the compound key of another scrambler are carried out correlation calculations in twos;

Step B: according to the result of calculation of the correlation calculations of steps A:

Judge and whether have following relation between the compound key: the relevant mould value of a compound key in compound key in 16 compound keys of a scrambler and 16 compound keys of another scrambler is 16, and is 0 with the relevant mould value of other 15 compound keys of described another scrambler; If, then with this compound key corresponding respectively scrambler be divided in the same scrambler grouping with same equivalent relation, according to as upper type, the scrambler that will meet this Rule of judgment is divided in different scramblers divides into groups;

Step C: the scrambler grouping that utilizes step B to obtain, and code character grouping scheme in the time-division-synchronization code multi-address division system standard, downlink frequency pilot code is divided into groups again, thereby obtain new code word and divide the result, this code word is divided among the result, and each in this scrambler grouping is organized corresponding one group of downlink frequency pilot code.

7, method according to claim 6 is characterized in that, step C comprises:

Step C1: from each different scrambler grouping, select a scrambler respectively with same equivalent relation, selected scrambler does not belong to the same scrambler code character of time-division-synchronization code multi-address division system standard code character grouping scheme between any two, each selected scrambler as basic scrambler, is constituted a scrambler base by selected basic scrambler;

Step C2: by determined scrambler base downlink frequency pilot code is divided into groups again, divide the result, the corresponding one group of downlink frequency pilot code of each basic scrambler thereby obtain new code word.

8, method according to claim 7 is characterized in that, step C1 comprises:

Step C11: as first group, from this first group, select a scrambler as basic scrambler with a described scrambler grouping with same equivalent relation;

Step C12: divide into groups as second group with another scrambler with same equivalent relation, from this second group, select another scrambler as basic scrambler, wherein, this another scrambler is different from this scrambler among the described step C11, and with step C11 in this scrambler belong to different scrambler code character in the time-division-synchronization code multi-address division system standard respectively; According to this step, from 12 scrambler groupings, select a basic scrambler respectively, form the scrambler base.

9, method according to claim 7 is characterized in that, in step C1, described scrambler base is at least one.

10, method according to claim 8 is characterized in that, among the step C12, scrambler of described selection comprises as basic scrambler:

Step C121: from a code character that is different from the code character of having selected, select a scrambler;

Step C122: judge that whether this selected scrambler and the scrambler selected be two scramblers in the same scrambler code character in the time-division-synchronization code multi-address division system standard grouping scheme, if, then return step C121, in step C121, reselect a new scrambler in the current selected code character, otherwise, execution in step C123;

Step C123: with selected scrambler as described basic scrambler.

11, method according to claim 8, it is characterized in that, in step C12, if in this second group, can't find with step C11 in selected this scrambler belong to the scrambler of the different scrambler code character in the grouping scheme of time-division-synchronization code multi-address division system standard respectively, then this method further comprises:

Return step C11, in first group described in the step C11, select new scrambler and then execution in step C12.

12, method according to claim 7 is characterized in that, step C2 comprises:

Step C21: each the basic scrambler in the selected scrambler base among the step C1 is identified, and each basic scrambler has unique separately identifier respectively;

Step C22: to be the determined identifier of each basic scrambler among the step C21, identify the scrambler grouping that this each basic scrambler originally belonged to, thereby obtain scrambler grouping based on basic scrambler;

Step C23:, adopt each scrambler in the grouping of basic scrambler identifier sign time-division-synchronization code multi-address division system scrambler according to the scrambler grouping of step C22 based on basic scrambler;

Step C24: based among the step C23 to the sign again of scrambler, search pairing all downlink frequency pilot code of each basic scrambler sign respectively, then, divide into groups based on basic scrambler, obtain the downlink frequency pilot code of each basic scrambler correspondence, divide the result thereby realize obtaining new code word.

13, method according to claim 6 is characterized in that step C comprises:

Each group in the scrambler grouping that obtains among the identification of steps B respectively, each group has unique separately identifier respectively, according to the group result after the sign, and with reference to the corresponding relation between scrambler and the downlink frequency pilot code in the time-division-synchronization code multi-address division system standard, determine to obtain scrambler that each identifier the identifies pairing downlink frequency pilot code of dividing into groups, divide the result thereby obtain new code word.

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