CN102281542A - Method and device for allocating Zadoff-Chu (ZC) root sequence indexes - Google Patents

Abstract

The embodiment of the invention discloses a method and a device for allocating Zadoff-Chu (ZC) root sequence indexes, which are used for solving the problem of difficulty in the allocation of the ZC root sequence indexes in each cell. The method comprises the followings steps of: acquiring parameters of cells to be allocated, wherein the parameters comprise cell leading format types (1, 2, 3 and 4), cell types and cell radius values, and the cell types comprise a high-speed cell type and a low-speed cell type; acquiring an Ncs value of a configuration zone of a ZC zero correlation zone according to the cell radius values; and allocating the ZC root sequence indexes of the cells to be allocated according to the cell leading format types, the cell types and the Ncs value until the number of the cells to be allocated is zero and/or all the available root sequence indexes are used completely. By the embodiment of the invention, the ZC root sequence indexes of the cells to be allocated are allocated according to the cell leading format types, the cell types and the Ncs value, so that the problem of difficulty in the allocation of the ZC root sequence indexes in each cell is solved.

Description

ZC root sequence index distribution method and device

Technical field

The present invention relates to wireless communication technology field, more particularly, relate to ZC root sequence index distribution method and device.

Background technology

At Long Term Evolution (Long Term Evolution, abbreviation LTE) in the system, the base station is by broadcasting (Broadcast Channel, be called for short BCH) channel notification mobile device (User Equipment, be called for short UE) this sub-district Random Access Channel (Random Access Channel, abbreviation RACH) operable article one ZC root sequence index (Logical root number), zero correlation block configuring area (Ncs) value, UE can utilize certain mapping ruler to calculate physics root sequence index according to above-mentioned index, obtains ZC root sequence according to formula then.According to parameters such as Ncs values ZC root sequence is carried out cyclic shift and can generate targeting sequencing, UE is constantly selecting targeting sequencing to insert receive channel at random at random.

Sub-district in the actual operation all is assigned fixing ZC root sequence index.Phase When building their networks, how the distribution of ZC root sequence index is carried out in each sub-district and become a kind of research tendency.

Summary of the invention

In view of this, embodiment of the invention purpose is to provide a kind of ZC root sequence index distribution method and device, how the problem that ZC root sequence index is distributed is carried out in each sub-district to solve.

For achieving the above object, the embodiment of the invention provides following technical scheme:

According to an aspect of the embodiment of the invention, a kind of ZC root sequence index distribution method is provided, comprising:

Obtain the parameter of sub-district to be allocated, described parameter comprises communicty preambel Format Type, cell type and radius of society value, and described communicty preambel Format Type comprises 0-4, and described cell type comprises high speed sub-district and low speed sub-district;

Be worth ZC zero correlation block configuring area Ncs value according to described radius of society;

According to described communicty preambel Format Type, cell type and Ncs value, ZC root sequence index is carried out in described sub-district to be allocated distributes, until the number of described sub-district to be allocated be zero and/or available root sequence index exhaust.

According to another aspect of the embodiment of the invention, a kind of ZC root sequence index distributor is provided, comprising:

First acquiring unit obtains the parameter of sub-district to be allocated, and described parameter comprises communicty preambel Format Type, cell type and radius of society value, and described leading Format Type comprises 0-4, and described cell type comprises high speed sub-district and low speed sub-district;

Second acquisition unit is used for being worth ZC zero correlation block configuring area Ncs value according to the described radius of society that described first acquiring unit obtains;

Allocation units, be used for the described communicty preambel Format Type, the cell type that obtain according to described first acquiring unit, and the described Ncs value that obtains of described second acquisition unit, ZC root sequence index is carried out in sub-district to be allocated distributes, until the number of sub-district to be allocated be zero and/or available root sequence index exhaust.

From above-mentioned technical scheme as can be seen, the embodiment of the invention is carried out ZC root sequence index to sub-district to be allocated and is distributed according to communicty preambel Format Type, cell type and Ncs value, how the problem that ZC root sequence index is distributed is carried out in each sub-district thereby solved.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

The ZC root sequence index distribution method flow chart that Fig. 1 provides for the embodiment of the invention;

Another flow chart of ZC root sequence index distribution method that Fig. 2 provides for the embodiment of the invention;

The another flow chart of ZC root sequence index distribution method that Fig. 3 provides for the embodiment of the invention;

The sub-district to be allocated that Fig. 4 provides for the embodiment of the invention and distributed the interval number of plies between the sub-district to calculate schematic diagram;

The ZC root sequence index distributor structural representation that Fig. 5 provides for the embodiment of the invention;

Another structural representation of ZC root sequence index distributor that Fig. 6 provides for the embodiment of the invention;

The another structural representation of ZC root sequence index distributor that Fig. 7 provides for the embodiment of the invention;

The another structural representation of ZC root sequence index distributor that Fig. 8 provides for the embodiment of the invention.

Embodiment

For quote and know for the purpose of, hereinafter the technical term of Shi Yonging, write a Chinese character in simplified form or abridge and be summarized as follows:

PRACH:Physical Radom Acess Channel, Physical Random Access Channel;

ZC:Zadoff-Chu sequence, the Zadoff-Chu sequence;

CM:Cubic Metric, cube system;

RTD:Round trip delay, round-trip delay;

FDD:Frequency Division Duplexing, Frequency Division Duplexing (FDD);

TDD:Time Division Duplexing, time division duplex;

Physical root sequence number: physics root sequence index.

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

Sub-district in the actual operation all is assigned fixing ZC root sequence index.Phase When building their networks, how the distribution of ZC root sequence index is carried out in each sub-district and become a kind of research tendency.

For this reason, the embodiment of the invention provides a kind of ZC root sequence index distribution method, the core concept of method provided by the present invention is: the parameters such as communicty preambel Format Type, cell type and radius of society value of obtaining sub-district to be allocated, after being worth the Ncs value according to radius of society, again according to above-mentioned communicty preambel Format Type, cell type and Ncs value, ZC root sequence index is carried out in sub-district to be allocated distributes, until the number of sub-district to be allocated be zero and/or available root sequence index exhaust.How the problem that ZC root sequence index is distributed is carried out in each sub-district to solve.

Referring to Fig. 1, said method comprises at least:

Step S1, obtain the parameter of sub-district to be allocated, above-mentioned parameter comprises communicty preambel Format Type, cell type and radius of society value, wherein, communicty preambel form (also can abbreviate leading form as) type comprises 0-4, and cell type comprises high speed sub-district and low speed sub-district;

Leading Format Type, cell type and radius of society can have multiple concrete obtain manner, but how specific implementation does not influence enforcement of the present invention.For example: leading Format Type can be by artificial appointment, and its default value is 0, and cell type can be defaulted as low speed by artificial appointment cell type; As for the radius of society value, can directly specify the radius of society value of each sub-district to be allocated by manual input, also can determine the radius of society value of each sub-district to be allocated based on the coverage prediction method, subsequent content of the present invention will be made detailed introduction to this.As for how to obtain the Ncs value also will in subsequent content of the present invention, be disclosed in the lump according to the radius of society value.

Step S2, be worth the Ncs value according to this radius of society;

Step S3, according to conductivity type, cell type and Ncs value before above-mentioned, ZC root sequence index is carried out in sub-district to be allocated distributes, be zero and/or available root sequence index exhausts until the number of sub-district to be allocated.

In other embodiments of the invention, to leading form is the sub-district to be allocated of 0-3, can be by the sequencing of long radius high speed sub-district, minor radius high speed sub-district, long radius low speed sub-district, minor radius low speed sub-district, according to above-mentioned cell type and Ncs value, ZC root sequence index is carried out in sub-district to be allocated distribute.

When specific implementation, after having finished the parameter of all sub-districts to be allocated under a certain base station and drawn the Ncs value by above-mentioned steps S1-S2, can travel through all sub-districts to be allocated, sorted by long radius high speed sub-district, minor radius high speed sub-district, long radius low speed sub-district, minor radius low speed sub-district in all sub-districts to be allocated, then by long radius high speed sub-district-" minor radius high speed sub-district-" long radius low speed sub-district-" sequencing of low speed sub-district, footpath carries out ZC root sequence index and distributes.

For leading form is 4 sub-district to be allocated, because the restriction of its no high speed low speed distributing the root sequence index also can sort in proper order by other not according in proper order, for example, can be carried out rank order by the input sequence of sub-district to be allocated.Sub-district to be allocated at leading format 4, after needn't waiting the parameter that gets access to all sub-districts to be allocated and drawing the Ncs value, execution in step S3 again is after can obtaining the parameter of a certain sub-district to be allocated and draw the Ncs value by step S1 and S2, be execution in step S3, and then rebound step S1.

Before address, can determine the radius of society value of each sub-district to be allocated based on the coverage prediction method, it is implemented as follows:

Add up the primary service area (can add up) of a certain sub-district to be allocated based on the network planning emulation platform;

Covering radius is expected in the subdistrict position covering point farthest of distance sub-district to be allocated, described primary service area the inside and the distance conduct between this subdistrict position (all there is its corresponding longitude and latitude each sub-district, and this longitude and latitude are subdistrict position);

Described expection covering radius be multiply by constant factor, as the radius of society value of described sub-district to be allocated.

Above-mentioned constant factor can be set according to actual conditions, such as can be 0.8 or 0.9.It will be appreciated by those skilled in the art that when the sub-district was positioned at the city and is positioned at the suburb, constant factor was different.

After having introduced radius of society value how to obtain sub-district to be allocated, will further be introduced " obtaining the Ncs value " among the step S2 according to the radius of society value:

The radius of society value of the span of Ncs and sub-district, maximum time delay expansion are relevant, and it satisfies following relation:

N _CS.T _S＞T _RTD+ T _MD(formula 1)

In the formula, T _SBe the sample length of ZC sequence, T _S=800/839[μ sec]; T _MDBe maximum delay expansion (being maximum multipath delay spread); T _RTDBe maximum RTD, and T _RTD=6.67.r[μ sec]; R is the radius of society value of sub-district, and unit is km.Formula 1 is carried out conversion, can get:

N _CS＞1.04875 (6.67r+T _MD) (formula 2)

In formula 2, add T _AdSch(T _AdSchBe the time span of searching for forward, it is by the decision of down-going synchronous error, and down-going synchronous error maximum is about 2 μ sec), then formula 2 becomes:

N _CS＞1.04875 (6.67r+T _MD+ 2) (formula 3)

In the present product, T _MDValue is 5 μ sec.

Hence one can see that, and the radius of society value of sub-district to be allocated can determine N _CSSpan.

Then can be according to N _CSSpan finally determine N _CSValue.Specific implementation is to choose to be positioned at N _CSSpan in minimum value as N _CSValue.

For the situation of leading format 4, N _CSValue condition such as following table 1:

?N CS

2

4

6

8

10

12

15

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

Table 1

For leading form 0-3, high speed sub-district and the desirable N in low speed sub-district _CSValue is different, and table 2 shows the high, low speed sub-district desirable N of leading form between 0-3 _CSValue.

For example, if sub-district to be allocated is the high speed sub-district, and its N that calculates _CSSpan be N _CS＞105, the N of this sub-district to be allocated then _CSConcrete value be 128.If sub-district to be allocated is the low speed sub-district, and its N that calculates _CSSpan be N _CS＞105, the N of this sub-district to be allocated then _CSConcrete value be 119.

Table 2

For ease of understanding this case technical scheme, now targeting sequencing, ZC root sequence etc. is simply introduced.

Can obtain corresponding physical root sequence index u (ZC root sequence index is corresponding one by one with physics root sequence index) according to ZC root sequence index.Can be in the hope of ZC root sequence according to following formula 1:

$x_u\left(n\right)=e^{-j\frac{\mathrm{\πun}(n+1)}{N_{\mathrm{ZC}}}},0\≤n\≤N_{\mathrm{ZC}}-1$ (formula 4)

Wherein, n is a ZC sequence figure place, and Nzc is the length of ZC sequence, and for leading form 0-3 (for example, being applied to the FDD system), the value of Nzc is 839), for leading format 4 (for example, being applied to the TDD system), the value of Nzc is 139, x _u(n) expression is corresponding to the ZC root sequence of u.

The targeting sequencing that each sub-district needs is 64, and targeting sequencing is obtained by cyclic shift by ZC root sequence.

Before sub-district to be allocated being carried out the distribution of ZC root sequence index, need know the number of the ZC root sequence index that sub-district to be allocated needs:

According to the record of protocol number 3GPP TS 36.211 5.7.2 joint,, can determine the number of its needed ZC root sequence index as follows corresponding to the high speed sub-district of leading form 0-3:

Step 1 supposes that the ZC root sequence index number that needs is initialized as 1, and promptly Nu=1 obtains corresponding physical root sequence index ui according to i logic root sequence index, and i is a positive integer.Step 2 supposes that the number of the targeting sequencing that can provide by the root sequence that physics root sequence index obtains for u i is

Computational methods as follows:

Work as N _CS≤ d _u＜N _ZC/ 3 o'clock,

$d_{\mathrm{start}}=d_u+n_{\mathrm{shift}}^{\mathrm{RA}}{N}_{\mathrm{CS}}$

(formula 5)

$N_{v_i}=n_{\mathrm{shift}}^{\mathrm{RA}}{n}_{\mathrm{groupt}}^{\mathrm{RA}}+{\stackrel{\‾}{n}}_{\mathrm{shift}}^{\mathrm{RA}}$

Work as N _ZC/ 3≤d _u≤ (N _ZC-N _CS)/2 o'clock,

$d_{\mathrm{start}}=N_{\mathrm{ZC}}-{2d}_u+n_{\mathrm{shift}}^{\mathrm{RA}}{N}_{\mathrm{CS}}$

(formula 6)

$N_{v_i}=n_{\mathrm{shift}}^{\mathrm{RA}}{n}_{\mathrm{groupt}}^{\mathrm{RA}}+{\stackrel{\‾}{n}}_{\mathrm{shift}}^{\mathrm{RA}}$

For other du value,

And the du in the above formula can be calculated by following formula:

$d_u=\left\{\begin{array}{cc}p& 0\&le;p<N_{\mathrm{ZC}}/2\\ N_{\mathrm{ZC}}-p& \mathrm{otherwise}\end{array}\right.$ (formula 7)

P is minimum nonnegative integer, by equation (p.u) modN _ZC=1 can obtain.

If Nu root sequence correspondence

Sum equal 64 greatly, promptly

Then calculate and finish, Nu is exactly the number of the ZC root sequence index of needs.

Otherwise i adds 1, and Nu adds 1, and logic root sequence index numbering adds 1, finds and this numbering corresponding physical root sequence index ui, forwards above-mentioned steps two to and continues to carry out.

And be example with the low speed sub-district corresponding to leading form 0-3, be 839/Ncs according to a producible targeting sequencing number of ZC root sequence index, suppose Ncs=15, then 839/15 to round the result be 55.The ZC root sequence index number that then producing 64 targeting sequencings needs is 64/55.Also promptly, need 2 ZC root sequence index, need give sub-district to be allocated to two ZC root sequence index.And when Ncs＞419, finally only can produce a targeting sequencing according to a ZC root sequence index, at this moment, the low speed sub-district needs 64 ZC root sequence index.

Corresponding to the sub-district of leading format 4, total number of its ZC root sequence index is 138, and no matter it is high speed sub-district or low speed sub-district, and the account form of its needed ZC root sequence index number is with the account form corresponding to the low speed sub-district of leading form 0-3.

After what ZC root sequence index definite a certain sub-district to be allocated needs, can carry out following operation:

Still introduce leading form 0-3 earlier, cell type is sub-district to be allocated at a high speed.For this type of sub-district, the relation of its ZC root sequence index and Ncs value sees the following form 3.

Table 3

At definite N _CSAfter the value, can obtain this N _CSOne group of corresponding ZC root sequence index according to the number of sub-district to be allocated needed ZC root sequence index, is distributed to sub-district to be allocated by logical order with ZC root sequence index then.For example, suppose the N of sub-district A to be allocated _CSValue is 128, needs 2 ZC root sequence index, supposes that 204-205 ZC root sequence index distributed to other sub-districts, then 206-207 ZC root sequence index is distributed to sub-district A to be allocated.

In table 3, according to the CM value ZC root sequence index to be divided into groups, ZC root sequence index grouping group number can reflect the height of CM value: group number is more little, and the CM value is more little.Low CM value targeting sequencing detects better performances, because the high speed sub-district is higher to the detection performance requirement of sequence, so for the high speed sub-district, can preferentially use the ZC root sequence index of LOW CM value.Therefore, in other embodiments of the invention, at leading form 0-3, cell type is sub-district to be allocated at a high speed, among the above-mentioned steps S3 distribution of ZC root sequence index is carried out in sub-district to be allocated and specifically can be:

To the sub-district to be allocated of leading form 0-3, when its cell type is high speed, preferentially choose the root sequence index of corresponding low CM value, it is distributed to sub-district to be allocated.

Still with N _CSValue is 128 for example, and the low CM value ZC root sequence index of 128 correspondences is 204-455 number, so carries out order assignment from No. 204 ZC root sequence index.Suppose that 204 and No. 205 ZC root sequence index have distributed to other sub-districts, then 206 and No. 207 ZC root sequence index are distributed to sub-district to be allocated.

When 204-455 ZC root sequence index assigns, run into N again _CSDuring=128 sub-district to be allocated, can No. 659 ZC root sequence index from high CM value group begin, falling distribution ZC root sequence (this moment, minimum can be got ZC root sequence index No. 456).

For N _CSBe the high speed sub-district to be allocated of the leading form 0-3 of other values, its distribution method is similar with it, does not give unnecessary details at this.

Subsequently, how we will introduce leading form 0-3, and cell type is the cell allocation ZC root sequence index to be allocated of low speed.The low speed sub-district does not have the scope restriction of the corresponding ZC root of Ncs value sequence index.So after definite Ncs value, and after the number according to the leading form 0-3 of the calculating of above-mentioned introduction low speed sub-district needed ZC root sequence index, can distribute (promptly from numbering 0 beginning order assignment) to ZC root sequence index by logical order.

The ZC root sequence index under the leading form 0-3 situation and the corresponding relation of physics root sequence index see also following table 4.

Table 4

As for the sub-district to be allocated of leading format 4, its N _CSValue and the corresponding scope of ZC root sequence index are without limits, and be similar with the low speed sub-district of leading form 0-3.Therefore, sub-district to be allocated for leading format 4, determining Ncs value (method of determining the Ncs value can be that the low speed sub-district of 0-3 is similar with leading form), and according to the method for the number of the needed ZC root of the leading format 4 of the calculating of above-mentioned introduction sequence index, after determining the number M of the needed sequence index in sub-district to be allocated, can choose M ZC root sequence index by logical order and distribute to sub-district to be allocated.

The corresponding relation of ZC root sequence index under the leading format 4 situation and physics root sequence index sees also following table 5

Table 5

Because ZC root sequence index limited amount, in assigning process, available root sequence index may occur exhausts, but the number of sub-district to be allocated is greater than zero situation, at this situation, in another embodiment of the present invention, referring to Fig. 2, more than method among all embodiment also can comprise the steps:

Step S4, when the number of sub-district to be allocated greater than zero and available root sequence index when having exhausted, to the sub-district to be allocated of leading form 0-3, can distribute the mode of the root sequence index that the sub-district distributes that multiplexing allocation strategy is carried out in sub-district to be allocated at a high speed according to high speed cell reuse to be allocated; To the low speed of leading form 0-3 sub-district to be allocated, can distribute the mode of the root sequence index that the sub-district distributes to carry out multiplexing allocation strategy according to low speed cell reuse to be allocated.The root sequence index of having distributed the sub-district to distribute such as, low speed sub-district to be allocated both reusable low speed, also the reusable root sequence index of having distributed the sub-district to distribute at a high speed; Leading format 4 can be according to carrying out multiplexing allocation strategy with the similar mode in the low speed of leading form 0-3 sub-district to be allocated.

Now illustrate, above-mentioned understanding: such as for leading form 0-3 low speed sub-district to be allocated to available ZC root sequence index, if sub-district to be allocated needs 3 continuous ZC root sequence index, then can be with 0-2,1-3 ..., the grouping of 835-837 travels through 0-837 ZC root sequence index, when finding in 0-837 number only surplus be not assigned with for 836 and No. 837, thinking does not have available sequence index.To enable multiplexing allocation strategy this moment.Also there is similar judgement sub-district to be allocated for leading form 0-3 high speed sub-district to be allocated and leading format 4.

Referring to Fig. 3, above-mentioned multiplexing allocation strategy comprises the steps:

S41 obtains the number N (N is a positive integer) of the Ncs value and the needed ZC sequence index of sub-district to be allocated according to the method for aforementioned introduction.

S42, determine a collection, it can be referred to as to treat multiplexing set collection, comprise that at least one treats multiplexing set treating that multiplexing set is concentrated, and each treats to comprise respectively in the multiplexing set N ZC root sequence index continuously according to the number of required ZC sequence index.

Now above-mentioned " continuously " made an explanation.

For the low speed of leading form 0-3 sub-district to be allocated, the logic index of ZC root sequence is that 0-837 circulation is continuous, promptly numbers 837 the next one and is numbered 0.Suppose that low speed to be allocated sub-district A needs 4 ZC root sequence index.Then confirmablely treat that multiplexing set comprises (0,1,2,3), (1,2,3,4), (5,6,7,8) ..., (834,835,836,837), (835,836,837,0), (836,837,0,1), (837,0,1,2), totally 838.Treat that multiplexing set is then formed and treat multiplexing set collection for above-mentioned 838.

And the ZC root sequence index of leading format 4 be numbered 0-137, also be that circulation is continuous corresponding to the logic index of the ZC root sequence of leading format 4, promptly number 137 the next one and be numbered 0.

Also promptly, the sub-district to be allocated of the low speed of leading form 0-3 sub-district to be allocated and leading format 4, the numbering for the treatment of the ZC root sequence index in the multiplexing set of its correspondence is that circulation is continuous.

As for the high speed of leading form 0-3 sub-district to be allocated, 0-23 number and 820-837 ZC root sequence index are inapplicable.Therefore, at the high speed sub-district of leading form 0-3, can not circulate.It only refers to continuous in turn continuously.Suppose that leading form is 4 ZC root sequence index of high speed to be allocated sub-district A needs of 0-3.Then confirmablely treat that multiplexing set comprises (24,25,26,27), (25,26,27,28) ..., (816,817,818,819).

S43, obtain and the above-mentioned set of cells of distribution for the treatment of that multiplexing set is corresponding, this has distributed and has comprised in the set of cells and distributed the sub-district, the above-mentioned sub-district of having distributed has been assigned with ZC root sequence index, and, each has distributed in the set of cells, and each has distributed sub-district employed ZC root sequence index with the corresponding ZC root sequence index in the multiplexing set for the treatment of common factor to be arranged.

Be example still, and suppose that sub-district A to be allocated needs 4 ZC root sequence index with leading form 0-3 low speed sub-district to be allocated.Then travel through all and distributed the sub-district, can obtain having distributed set of cells corresponding to above-mentioned 838 838 for the treatment of multiplexing set.

Need to prove, with corresponding (0,1,2,3) the set of cells of distribution is an example, in this set, be not that all have distributed the sub-district all to use 0-3 ZC root sequence index, some has distributed the sub-district may only use No. 0, or 0-2 number, or No. 1, as long as distributed one or more in 0-3 number being arranged in the employed ZC sequence index in sub-district, it can be classified as and (0,1,2,3) in the Dui Ying set of cells of distribution, can the rest may be inferred, do not give unnecessary details at this.

S44 has distributed set of cells to carry out multiplexing space evaluates calculation to each, obtains assessed value.

Among the step S44, the specific implementation that obtains assessed value can comprise:

According to formula S core=K ₁Layer * K ₂Distance asks for sub-district to be allocated respectively and distributes the multiplexing space scoring that has distributed the sub-district corresponding in the set of cells, the scoring of multiplexing space is used to characterize sub-district to be allocated and has distributed annoyance level between the sub-district, the scoring of multiplexing space is high more, and annoyance level is just low more;

Choose minimum value in the scoring of above-mentioned multiplexing space as the corresponding assessed value of this set (treat to include only in the multiplexing set one when having distributed the sub-district when a certain, the multiplexing space scoring of its correspondence is the assessed value of this set correspondence).Just, the minimum value in the scoring of multiplexing space has been expressed the annoyance level that has distributed the maximum that sub-district and sub-district to be allocated can reach in this set.

In the above-mentioned formula, Score represents the scoring of multiplexing space, Layer represents the sub-district to be allocated and the above-mentioned interval number of plies of having distributed between the sub-district, Distance represents the subdistrict position of sub-district to be allocated and the distance between the above-mentioned subdistrict position that has distributed the sub-district, and K1 and K2 represent the coefficient of the number of plies and the coefficient of distance at interval respectively.

Suppose that sub-district A to be allocated needs two ZC root sequence index (N=2), and can obtain and distribute set of cells 1 and distributed set of cells 2, wherein, having distributed in the set of cells 1 has B, C, and three of D have distributed the sub-district, B, C, D uses No. 24 and No. 25 ZC root sequence index; Having distributed has two of E, F to distribute the sub-district in the set of cells 2, E, F use 26 and No. 27 ZC root sequence index.Also promptly, distributed set of cells 1 and treated that multiplexing set (24,25) is corresponding, distributed set of cells 2 and treat that multiplexing set (25,26) is corresponding.

For distributing set of cells 1, need utilize formula S core=K ₁Layer * K ₂Distance asks for the multiplexing space scoring between the AB, between the AC and between the AD respectively, and choose the assessed value that multiplexing set 1 correspondence is treated in a minimum conduct in three scoring that obtain;

In like manner, for distributing set of cells 2, need utilize formula S core=K ₁Layer * K ₂Distance asks for the multiplexing space scoring between the AE, between the AF respectively, and chooses the assessed value that multiplexing set 2 correspondences are treated in a minimum conduct in two space scorings that obtain.

The rest may be inferred,, will have X and distribute set of cells, and finally obtain X assessed value when treating multiplexing set as X (X is a positive integer).

In addition, be example to ask for sub-district A to be allocated and to have distributed the interval number of plies between the B of sub-district, referring to Fig. 4, above-mentioned sub-district to be allocated and distributed the interval number of plies between the sub-district to obtain in the following way:

, the whole network fallen into justify interior sector number as sub-district A to be allocated and distributed the interval number of plies between the B of sub-district with to distribute position, the site line of sub-district B is that diameter justify with sub-district A to be allocated.

Thus, just ensure between the sub-district of using same ZC root sequence index and be separated by farthest, guaranteeing the minimum interference between the sub-district, and avoid neighbor cell to use same ZC root sequence index from distance and two aspects of the number of plies.Above-mentioned K1 and K2 are nonnegative number, can all get 1, certainly, also can according to circumstances choose other numerical value.Such as, when not considering the number of plies, K1 can be got 0.

S45, according to above-mentioned assessed value select and above-mentioned sub-district to be allocated between the set of cells of distribution of annoyance level minimum, N the ZC root sequence index in the multiplexing set for the treatment of of distributing the set of cells correspondence of annoyance level minimum distributed to described sub-district to be allocated.

Also promptly, the assessed value correspondence of numerical value maximum treated that N in the multiplexing set is distributed to sub-district to be allocated.

That is to say,, then give sub-district A to be allocated the 0-3 index assignment if distributed the assessed value maximum of set of cells 1.

Corresponding with it, the embodiment of the invention also provides a kind of ZC root sequence index distributor, and when specific implementation, ZC root sequence index distributor can be EMS (equipment management system), network element managing system etc.Referring to Fig. 5, this device comprises at least:

First acquiring unit 1 is used to obtain the parameter of sub-district to be allocated, and above-mentioned parameter comprises communicty preambel Format Type, cell type and radius of society value, and above-mentioned leading Format Type comprises 0-4, and cell type comprises high speed sub-district and low speed sub-district;

Second acquisition unit 2, the radius of society that obtains according to first acquiring unit 1 is worth the Ncs value;

Allocation units 3, be used for the Ncs value that obtains according to above-mentioned communicty preambel Format Type, cell type and second acquisition unit 2 that first acquiring unit 1 obtains, ZC root sequence index is carried out in sub-district to be allocated distributes, until the number of sub-district to be allocated be zero and/or available root sequence index exhaust.

In other embodiments of the invention, above-mentioned allocation units 3 are further used for:

To the sub-district to be allocated of leading form 0-3,,, ZC root sequence index is carried out in sub-district to be allocated distribute according to above-mentioned cell type and Ncs value by the sequencing of long radius high speed sub-district, minor radius high speed sub-district, long radius low speed sub-district, minor radius low speed sub-district.

In addition, in other embodiments of the invention, above-mentioned allocation units 3 further also can be used for: to the low speed of leading form 0-3 sub-district to be allocated, can distribute the mode of the root sequence index that the sub-district distributes to carry out multiplexing allocation strategy according to low speed cell reuse to be allocated.The root sequence index of having distributed the sub-district to distribute such as, low speed sub-district to be allocated both reusable low speed, also the reusable root sequence index of having distributed the sub-district to distribute at a high speed; And/or,

For the sub-district to be allocated of leading format 4, can distribute the mode of the root sequence index that the sub-district distributes to carry out multiplexing allocation strategy according to cell reuse to be allocated.

In other embodiments of the invention, referring to Fig. 6, the device among the above embodiment also can comprise:

Multiplexing Unit 4, be used for when the number of sub-district to be allocated has exhausted greater than zero and available root sequence index, to the sub-district to be allocated of leading form 0-3, carry out multiplexing allocation strategy according to the root sequence index that high speed cell reuse to be allocated has distributed the sub-district to distribute at a high speed.

In other embodiments of the invention, referring to Fig. 7, above-mentioned Multiplexing Unit 4 can comprise:

Determine subelement 41, be used for determining the number N of required ZC root sequence index according to the Ncs value of sub-district to be allocated, and determine to treat multiplexing set collection according to above-mentioned N, wherein, described treat that multiplexing set concentrates each treat that multiplexing set comprises N ZC root sequence index continuously;

Distributed set of cells to obtain subelement 42, be used to obtain and the above-mentioned corresponding set of cells of distribution of multiplexing set for the treatment of, comprise in the set of cells and distributed the sub-district above-mentioned the distribution, the described sub-district of having distributed has been assigned with ZC root sequence index, and arbitrary above-mentioned sub-district employed ZC root sequence index of having distributed has common factor with the corresponding ZC root sequence index in the multiplexing set for the treatment of;

Multiplexing space assessment subelement 43 is used for having distributed set of cells to carry out multiplexing space evaluates calculation to each, obtains assessed value;

Distribute subelement 44, be used for according to above-mentioned assessed value select and described sub-district to be allocated between the set of cells of distribution of annoyance level minimum, N the ZC root sequence index in the multiplexing set for the treatment of of distributing the set of cells correspondence of annoyance level minimum distributed to sub-district to be allocated.

In other embodiments of the invention, referring to Fig. 8, above-mentioned multiplexing space assessment subelement 43 can comprise:

Scoring subelement 431 is used for according to formula S core=K ₁Layer * K ₂Distance asks for sub-district to be allocated respectively and has distributed the multiplexing space between the sub-district of distributing in the set of cells to mark;

Choose subelement 432, be used for choosing the minimum value of above-mentioned multiplexing space scoring as above-mentioned assessed value;

Wherein, Score represents the scoring of multiplexing space, Layer represents the above-mentioned sub-district to be allocated and the above-mentioned interval number of plies of having distributed between the sub-district, Distance represents the subdistrict position of above-mentioned sub-district to be allocated and the distance between the above-mentioned subdistrict position that has distributed the sub-district, K1 and K2 represent the coefficient of the interval number of plies and the coefficient of distance respectively, and K1 and K2 are nonnegative number.

Sub-district to be allocated and the described specific implementation of having distributed the interval number of plies between the sub-district and having obtained the radius of society value of sub-district to be allocated can not given unnecessary details at this referring to the inventive method part.

Those of ordinary skills can recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.

The those skilled in the art can be well understood to, and is the convenience described and succinct, and the concrete course of work of the device of foregoing description and unit can not repeat them here with reference to the corresponding process among the preceding method embodiment.

In several embodiment that the application provided, should be understood that disclosed apparatus and method can realize by other mode.For example, device embodiment described above only is schematic, for example, the division of described unit, only be that a kind of logic function is divided, during actual the realization other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, the shown or coupling each other discussed or directly to be coupled or to communicate to connect can be by some interfaces, the indirect coupling of device or unit or communicate to connect can be electrically, machinery or other form.

Described unit as separating component explanation can or can not be physically to separate also, and the parts that show as the unit can be or can not be physical locations also, promptly can be positioned at a place, perhaps also can be distributed on a plurality of unit.Can select wherein some or all of unit to realize the purpose of present embodiment scheme according to the actual needs.

In addition, each functional unit in each embodiment of the present invention can be integrated in the processing unit, also can be that the independent physics in each unit exists, and also can be integrated in the unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, also can adopt the form of SFU software functional unit to realize.

If described integrated unit is realized with the form of SFU software functional unit and during as independently production marketing or use, can be stored in the computer read/write memory medium.Based on such understanding, part or all or part of of this technical scheme that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (14)

1. a ZC root sequence index distribution method is characterized in that, comprising:

Obtain the parameter of sub-district to be allocated, described parameter comprises communicty preambel Format Type, cell type and radius of society value, and described communicty preambel Format Type comprises 0-4, and described cell type comprises high speed sub-district and low speed sub-district;

Be worth ZC zero correlation block configuring area Ncs value according to described radius of society;

According to described communicty preambel Format Type, cell type and Ncs value, ZC root sequence index is carried out in described sub-district to be allocated distributes, until the number of described sub-district to be allocated be zero and/or available root sequence index exhaust.

2. the method for claim 1 is characterized in that, and is described according to described communicty preambel Format Type, cell type and Ncs value, and the specific implementation of sub-district to be allocated being carried out the distribution of ZC root sequence index comprises:

To leading form is the sub-district described to be allocated of 0-3, sequencing by long radius high speed sub-district, minor radius high speed sub-district, long radius low speed sub-district, minor radius low speed sub-district, according to described cell type and Ncs value, ZC root sequence index is carried out in described sub-district to be allocated distribute.

3. method as claimed in claim 1 or 2 is characterized in that, also comprises:

When the number of described sub-district to be allocated has exhausted greater than zero and available root sequence index, to the sub-district to be allocated of leading form 0-3, distributed the mode of the root sequence index that the sub-district distributes to carry out multiplexing allocation strategy at a high speed according to high speed cell reuse to be allocated.

4. method as claimed in claim 3 is characterized in that, described multiplexing allocation strategy comprises:

Determine the number N of required ZC root sequence index according to the Ncs value of sub-district to be allocated, described N is a positive integer;

Determine to treat multiplexing set collection according to described N, wherein, described treat that multiplexing set concentrates each treat that multiplexing set comprises N continuous ZC root sequence index;

Obtain and the described corresponding set of cells of distribution of multiplexing set for the treatment of, comprise in the set of cells and distributed the sub-district described the distribution, the described sub-district of having distributed has been assigned with ZC root sequence index, and each is described has distributed sub-district employed ZC root sequence index with the corresponding ZC root sequence index in the multiplexing set for the treatment of common factor to be arranged;

Distribute set of cells to carry out multiplexing space evaluates calculation to each, obtained assessed value;

According to described assessed value select and described sub-district to be allocated between the set of cells of distribution of annoyance level minimum, N the ZC root sequence index in the multiplexing set for the treatment of of distributing the set of cells correspondence of described annoyance level minimum distributed to described sub-district to be allocated.

5. method as claimed in claim 4 is characterized in that, has describedly distributed set of cells to carry out multiplexing space evaluates calculation to each, and the specific implementation that obtains assessed value comprises:

According to formula S core=K ₁Layer * K ₂Distance asks for sub-district to be allocated respectively and has distributed the multiplexing space scoring that has distributed in the set of cells between the sub-district;

Choose minimum value in the scoring of described multiplexing space as described assessed value;

Wherein, Score represents the scoring of multiplexing space, Layer represents the described sub-district to be allocated and the described interval number of plies of having distributed between the sub-district, Distance represents the subdistrict position of described sub-district to be allocated and the distance between the described subdistrict position that has distributed the sub-district, K1 and K2 represent the coefficient of the interval number of plies and the coefficient of distance respectively, and K1 and K2 are nonnegative number.

6. method as claimed in claim 5 is characterized in that, described sub-district to be allocated and describedly distributed the interval number of plies between the sub-district to obtain in the following way:

With described sub-district to be allocated and described to have distributed position, the site line of sub-district be that diameter is justified, the whole network is fallen into sector number in the circle as described sub-district to be allocated and distributed the interval number of plies between the sub-district.

7. the method for claim 1 is characterized in that, the described specific implementation of obtaining the radius of society value of sub-district to be allocated is:

Add up the primary service area of sub-district to be allocated;

With between the subdistrict position covering point farthest of the described sub-district to be allocated of distance, described primary service area the inside and the described subdistrict position apart from as expecting covering radius;

Described expection covering radius be multiply by constant factor, as the radius of society value of described sub-district to be allocated.

8. a ZC root sequence index distributor is characterized in that, comprising:

First acquiring unit obtains the parameter of sub-district to be allocated, and described parameter comprises communicty preambel Format Type, cell type and radius of society value, and described leading Format Type comprises 0-4, and described cell type comprises high speed sub-district and low speed sub-district;

Second acquisition unit is used for being worth ZC zero correlation block configuring area Ncs value according to the described radius of society that described first acquiring unit obtains;

Allocation units, be used for the described communicty preambel Format Type, the cell type that obtain according to described first acquiring unit, and the described Ncs value that obtains of described second acquisition unit, ZC root sequence index is carried out in sub-district to be allocated distributes, until the number of sub-district to be allocated be zero and/or available root sequence index exhaust.

9. device as claimed in claim 8 is characterized in that, described allocation units are further used for:

To the sub-district to be allocated of leading form 0-3,,, ZC root sequence index is carried out in sub-district to be allocated distribute according to described cell type and Ncs value by the sequencing of long radius high speed sub-district, minor radius high speed sub-district, long radius low speed sub-district, minor radius low speed sub-district.

10. install as claimed in claim 8 or 9, it is characterized in that, also comprise:

Multiplexing Unit, be used for when the number of sub-district to be allocated greater than zero and available root sequence index when having exhausted, distributed the mode of the root sequence index that the sub-district distributes to carry out multiplexing allocation strategy at a high speed according to high speed cell reuse to be allocated.

11. device as claimed in claim 10 is characterized in that, described Multiplexing Unit comprises:

Determine subelement, be used for determining according to the Ncs value of sub-district to be allocated the number N of required ZC root sequence index, described N is a positive integer, and determines to treat multiplexing set collection according to above-mentioned N, wherein, described treat that multiplexing set concentrates each treat that multiplexing set comprises N ZC root sequence index continuously;

Distributed set of cells to obtain subelement, be used to obtain and the described corresponding set of cells of distribution of multiplexing set for the treatment of, comprise in the set of cells and distributed the sub-district described the distribution, the described sub-district of having distributed has been assigned with ZC root sequence index, and arbitrary described sub-district employed ZC root sequence index of having distributed has common factor with the corresponding ZC root sequence index in the multiplexing set for the treatment of;

Multiplexing space assessment subelement is used for having distributed set of cells to carry out multiplexing space evaluates calculation to each, obtains assessed value;

Distribute subelement, be used for according to described assessed value select and described sub-district to be allocated between the set of cells of distribution of annoyance level minimum, N the ZC root sequence index in the multiplexing set for the treatment of of distributing the set of cells correspondence of described annoyance level minimum distributed to described sub-district to be allocated.

12. device as claimed in claim 11 is characterized in that, described multiplexing space assessment subelement comprises:

The scoring subelement is used for according to formula S core=K ₁Layer * K ₂Distance asks for sub-district to be allocated respectively and has distributed the multiplexing space between the sub-district of distributing in the set of cells to mark;

Choose subelement, be used for choosing the minimum value of described multiplexing space scoring as described assessed value;

Wherein, Score represents the scoring of multiplexing space, Layer represents the described sub-district to be allocated and the described interval number of plies of having distributed between the sub-district, Distance represents the subdistrict position of described sub-district to be allocated and the distance between the described subdistrict position that has distributed the sub-district, K1 and K2 represent the coefficient of the interval number of plies and the coefficient of distance respectively, and K1 and K2 are nonnegative number.

13. device as claimed in claim 12 is characterized in that, described sub-district to be allocated and describedly distributed the interval number of plies between the sub-district to obtain in the following way:

With described sub-district to be allocated and described to have distributed position, the site line of sub-district be that diameter is justified, the whole network is fallen into sector number in the circle as described sub-district to be allocated and distributed the interval number of plies between the sub-district.

14. device as claimed in claim 8 is characterized in that, the described specific implementation of obtaining the radius of society value of sub-district to be allocated is:

Add up the primary service area of sub-district to be allocated;

With between the subdistrict position covering point farthest of the described sub-district to be allocated of distance, described primary service area the inside and the described subdistrict position apart from as expecting covering radius;

Described expection covering radius be multiply by constant factor, as the radius of society value of described sub-district to be allocated.

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