CN102281542B - 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 (LongTermEvolution, be called for short LTE) in system, base station is by broadcast (BroadcastChannel, be called for short BCH) channel notification mobile device (UserEquipment, be called for short UE) this community Random Access Channel (RandomAccessChannel, be called for short RACH) operable Article 1 ZC root sequence index (Logicalrootnumber), zero correlation block configuring area (Ncs) value, UE can utilize certain mapping ruler to calculate physics root sequence index according to above-mentioned index, then according to formula, obtains ZC root sequence.According to parameters such as Ncs values, ZC root sequence being carried out to cyclic shift can generating leader sequence, and UE selects targeting sequencing to access random receive channel in the random moment.

Actual operation Zhong community is all assigned fixing ZC root sequence index.Phase When building their networks, how the distribution of ZC root sequence index is carried out in Dui Ge community becomes a kind of research tendency.

Summary of the invention

In view of this, embodiment of the present invention object is to provide a kind of ZC root sequence index distribution method and device, and to solve, how the problem that ZC root sequence index is distributed is carried out in Dui Ge community.

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

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

Obtain the parameter of community 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 community and low speed community;

According to described radius of society, be worth ZC zero correlation block configuring area Ncs value;

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

Wherein, when the number of described community to be allocated is greater than zero and available root sequence index while having exhausted, the community to be allocated that is 0-3 to leading Format Type, according to high speed cell reuse to be allocated, distributed at a high speed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy, or, the low speed community to be allocated that is 0-3 to leading Format Type, has distributed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy according to low speed cell reuse to be allocated.

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

The first acquiring unit, obtains the parameter of community 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 community and low speed community;

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

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

Multiplexing Unit, for be greater than zero and available root sequence index while having exhausted when the number of community to be allocated, according to high speed cell reuse to be allocated, distributed at a high speed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy, or, the low speed community to be allocated that is 0-3 to leading Format Type, has distributed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy according to low speed cell reuse to be allocated.

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

Accompanying drawing explanation

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

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

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

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

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

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

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

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

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

Embodiment

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

PRACH:PhysicalRadomAcessChannel, Physical Random Access Channel;

ZC:Zadoff-Chusequence, Zadoff-Chu sequence;

CM:CubicMetric, cube system;

RTD:Roundtripdelay, round-trip delay;

FDD:FrequencyDivisionDuplexing, Frequency Division Duplexing (FDD);

TDD:TimeDivisionDuplexing, time division duplex;

Physicalrootsequencenumber: physics root sequence index.

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

Actual operation Zhong community is all assigned fixing ZC root sequence index.Phase When building their networks, how the distribution of ZC root sequence index is carried out in Dui Ge community becomes a kind of research tendency.

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

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

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

Leading Format Type, cell type and radius of society can have multiple concrete obtain manner, but how specific implementation does not affect enforcement of the present invention.For example: leading Format Type can be by manually specifying, its default value is 0, and cell type can, by manually specifying cell type, be defaulted as low speed; As for radius of society value, can directly by craft, input the radius of society value of specifying each community to be allocated, also can determine based on coverage prediction method the radius of society value of each community to be allocated, subsequent content of the present invention will be described in detail this.As for how to obtain Ncs value according to radius of society value, also will in subsequent content of the present invention, be disclosed in the lump.

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

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

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

When specific implementation, by above-mentioned steps S1-S2, completed the parameter of all communities to be allocated under a certain base station and drawn after Ncs value, can travel through all communities to be allocated, large radius high speed community is pressed in all communities to be allocated, minor radius high speed community, large radius low speed community, sort in minor radius low speed community, then by the sequencing of low speed community, large radius high speed community-> > minor radius high speed large radius low speed community-> > footpath of community-> >, carrying out ZC root sequence index distributes.

The community to be allocated that is 4 for leading form, because it is without the restriction of high speed low speed, distributing root sequence index not according to order, also can sort by other orders, for example, can carry out order sequence by the input sequence of community to be allocated.For the community to be allocated of leading format 4, needn't wait and get the parameter of all communities to be allocated and draw after Ncs value, then perform step S3, can obtain the parameter of a certain community to be allocated and draw after Ncs value by step S1 and S2, perform step S3, and then rebound step S1.

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

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

By the distance between the subdistrict position of distance community to be allocated, described primary service area the inside covering point farthest and this subdistrict position (there is its corresponding longitude and latitude each community, and this longitude and latitude are subdistrict position) as expecting covering radius;

Described expection covering radius is multiplied by constant factor, as the radius of society value of described community 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 community is positioned at city and is positioned at suburb, constant factor is different.

Introducing after radius of society value how to obtain community to be allocated, will further to " obtaining Ncs value according to radius of society value " in step S2, introduced:

The radius of society value of the span of Ncs and community, maximum time delay expansion are relevant, and it meets following relation:

N _cS.T _s> T _rTD+ T _mD(formula 1)

In formula, T _sfor the sample length of ZC sequence, T _s=800/839[μ sec]; T _mDfor maximum delay expansion (being maximum multipath delay spread); T _rTDfor maximum RTD, and T _rTD=6.67r[μ sec]; R is the radius of society value of community, and unit is km.Formula 1 is converted, can obtain:

N _cS> 1.04875 (6.67r+T _mD) (formula 2)

In formula 2, add T _adSch(T _adSchfor the time span of search forward, it determines by down-going synchronous error, and down-going synchronous error maximum is about 2 μ sec), formula 2 becomes:

N _cS> 1.04875 (6.67r+T _mD+ 2) (formula 3)

In current product, T _mDvalue is 5 μ sec.

Hence one can see that, and the radius of society value of community 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 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 community and the desirable N in low speed community _cSvalue is different, and table 2 shows the high, low speed community desirable N of leading form between 0-3 _cSvalue.

For example, if community to be allocated is high speed community, and its N calculating _cSspan be N _cS> 105, the N of this community to be allocated _cSconcrete value be 128.If community to be allocated is low speed community, and its N calculating _cSspan be N _cS> 105, the N of this community to be allocated _cSconcrete value be 119.

Table 2

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

According to ZC root sequence index, can obtain corresponding physics root sequence index u(ZC root sequence index corresponding one by one with physics 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 ZC sequence figure place, Nzc is the length of ZC sequence, for leading form 0-3(for example, be applied to FDD system), the value of Nzc is 839), for leading format 4 (for example, be applied to TDD system), the value of Nzc is that 139, xu (n) represents the ZC root sequence corresponding to u.

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

Before community execution ZC root sequence index to be allocated is distributed, need to know the number of the ZC root sequence index of community to be allocated needs:

According to the record of protocol number 3GPPTS36.211 5.7.2 joint, corresponding to the high speed community of leading form 0-3, can determine as follows the number of its needed ZC root sequence index:

Step 1, supposes that the ZC root sequence index number needing is initialized as 1, i.e. Nu=1, obtains corresponding physics root sequence index ui according to i logic root sequence index, and i is positive integer.Step 2, the number of the targeting sequencing that the root sequence of supposing to obtain for ui by physics root sequence index can provide 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)

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

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)

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

For other du value,

=1.

And du in 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 is corresponding

sum be more than or equal to 64,

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

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

And take the low speed community corresponding to leading form 0-3 as example, according to a producible targeting sequencing number of ZC root sequence index, be 839/Ncs, suppose Ncs=15,839/15 to round result be 55.The ZC root sequence index number that producing 64 targeting sequencings needs is 64/55.Also, need 2 ZC root sequence index, two ZC root sequence index need to be given to community to be allocated.And when Ncs>419, according to a ZC root sequence index, finally only can produce a targeting sequencing, now, low speed community needs 64 ZC root sequence index.

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

Determining that a certain community to be allocated needs, after how many ZC root sequence index, can carry out following operation:

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

Table 3

At definite N _cSafter value, can obtain this N _cSone group of corresponding ZC root sequence index, then according to the number of community to be allocated needed ZC root sequence index, distributes to community to be allocated by logical order by ZC root sequence index.For example, suppose the N of community A to be allocated _cSvalue is 128, needs 2 ZC root sequence index, supposes that 204-205 ZC root sequence index distributed to other communities, 206-207 ZC root sequence index is distributed to community A to be allocated.

In table 3, according to 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 less, and CM value is less.Low CM value targeting sequencing detects better performances, because high speed community is higher to the detection performance requirement of sequence, so for high speed community, can preferentially use the ZC root sequence index of LOWCM value.Therefore, in other embodiments of the invention, for leading form 0-3, cell type is community to be allocated at a high speed, in above-mentioned steps S3, the distribution of ZC root sequence index is carried out in community to be allocated and specifically can be:

To the community 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, distributed to community to be allocated.

Still with N _cSvalue is 128 for example, and the low CM value ZC root sequence index of 128 correspondences is No. 204-455, therefore from No. 204 ZC root sequence index, carries out order-assigned.Suppose that 204 and No. 205 ZC root sequence index have distributed to other communities, 206 and No. 207 ZC root sequence index are distributed to community to be allocated.

When 204-455 ZC root sequence index is assigned, then run into N _cSduring=128 community to be allocated, can No. 659 ZC root sequence index from high CM value group start, falling distribution ZC root sequence (now minimum can be got ZC root sequence index No. 456).

For N _cSfor the high speed community to be allocated of the leading form 0-3 of other values, its distribution method is similar with it, and therefore not to repeat here.

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

ZC root sequence index in leading form 0-3 situation and the corresponding relation of physics root sequence index refer to following table 4.

Table 4

As for the community to be allocated of leading format 4, its N _cSvalue does not limit with the corresponding scope of ZC root sequence index, similar with the low speed community of leading form 0-3.Therefore, for the community to be allocated of leading format 4, in definite Ncs value (method of determining Ncs value can be similar with the low speed community that leading form is 0-3), 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, determine after the number M of the needed sequence index in community to be allocated, can choose M ZC root sequence index by logical order and distribute to community to be allocated.

The corresponding relation of the ZC root sequence index in leading format 4 situation and physics root sequence index refers to following table 5.

Table 5

Due to ZC root sequence index limited amount, in assigning process, may occur that available root sequence index exhausts, but the situation that the number of community to be allocated is greater than zero, for this situation, in another embodiment of the present invention, referring to Fig. 2, the method in above all embodiment also can comprise the steps:

Step S4, be greater than zero and available root sequence index while having exhausted when the number of community to be allocated, to the community to be allocated of leading form 0-3, can distribute at a high speed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy to community to be allocated according to high speed cell reuse to be allocated; To the low speed of leading form 0-3 community to be allocated, can distribute the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy according to low speed cell reuse to be allocated.Such as, the low speed community to be allocated root sequence index that both reusable low speed has distributed community to distribute, the root sequence index that also reusable has distributed community 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 community to be allocated of leading form 0-3.

Now illustrate, the above-mentioned understanding to available ZC root sequence index: such as for leading form 0-3 low speed community to be allocated, if community to be allocated needs 3 continuous ZC root sequence index, can be with 0-2,1-3 ..., the grouping of 835-837 travels through 0-837 ZC root sequence index, when only finding in No. 0-837 surplus not being assigned with for 836 and No. 837, think and there is no available sequence index.Now will enable multiplexing allocation strategy.For the community to be allocated of leading form 0-3 high speed community to be allocated and leading format 4, also there is similar judgement.

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

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

S42, according to the number of required ZC sequence index, determine a collection, 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 multiplexing set N ZC root sequence index continuously.

Now above-mentioned " continuously " made an explanation.

For the low speed community to be allocated of leading form 0-3, the logic index of ZC root sequence is that 0-837 circulation is continuous, numbers 837 the next one and is numbered 0.Suppose that low speed to be allocated community A needs 4 ZC root sequence index.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 forms and treat multiplexing set collection for above-mentioned 838.

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

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

As for the high speed community to be allocated of leading form 0-3, No. 0-23 and 820-837 ZC root sequence index inapplicable.Therefore,, for the high speed community 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 community A needs of 0-3.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 set of cells to comprise and has distributed community, the above-mentioned community of having distributed has been assigned with ZC root sequence index, and, each distribution in set of cells, eachly distributed the ZC root sequence index that community is used to have common factor with the corresponding ZC root sequence index in multiplexing set for the treatment of.

Still take leading form 0-3 low speed community to be allocated as example, and suppose that community A to be allocated needs 4 ZC root sequence index.Travel through all communities of having distributed, can obtain having distributed set of cells corresponding to above-mentioned 838 838 for the treatment of multiplexing set.

It should be noted that, with corresponding (0,1,2,3) the set of cells of distribution is example, in this set, be not that 0-3 ZC root sequence index has all been used in all communities of having distributed, some has distributed community may only use No. 0, or No. 0-2, or No. 1, as long as there are one or more in No. 0-3 in the ZC sequence index of having distributed community to use, can be classified as and (0,1,2,3) in the corresponding set of cells of distribution, can the rest may be inferred, therefore not to repeat here.

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

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

According to formula S core=K ₁layer × K ₂distance asks for respectively community to be allocated and distributes the multiplexing space scoring that has distributed community corresponding in set of cells, the scoring of multiplexing space is for characterizing community to be allocated and having distributed the annoyance level between community, the scoring of multiplexing space is higher, and annoyance level is just lower;

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

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

Suppose that community 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, distributed in set of cells 1 and had B, C, tri-of D have distributed community, B, C, D is used No. 24 and No. 25 ZC root sequence index; Distributed in set of cells 2 and had E, two of F to distribute community, E, F are used 26 and No. 27 ZC root sequence index.Also, 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 to utilize formula S core=K ₁layer × K ₂distance, asks for respectively the multiplexing space scoring between AB, between AC and between AD, and in three scorings that obtain, chooses a minimum conduct and treat the assessed value of multiplexing set 1 correspondence;

In like manner, for distributing set of cells 2, need to utilize formula S core=K ₁layer × K ₂distance, asks for respectively the multiplexing space scoring between AE, between AF, and in two spaces scorings that obtain, chooses a minimum conduct and treat the assessed value of multiplexing set 2 correspondences.

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

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

Take community A to be allocated, justify as diameter with position, the site line that distributes community B, the sector number in the whole network falls into circle is as community A to be allocated and distributed the interval number of plies between the B of community.

Thus, just from distance and two aspects of the number of plies, ensure between the community of using same ZC root sequence index and be separated by farthest, to guarantee the minimum interference between community, and avoid neighbor cell to use same ZC root sequence index.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 to 0.

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

Also, by corresponding the assessed value of numerical value maximum treating, N in multiplexing set is distributed to community to be allocated.

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

In contrast should, the embodiment of the present invention also provides a kind of ZC root sequence index distributor, 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 at least comprises:

The first acquiring unit 1, for obtaining the parameter of community to be allocated, 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 community and low speed community;

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

Allocation units 3, the Ncs value obtaining for the above-mentioned communicty preambel Format Type, cell type and the second acquisition unit 2 that obtain according to the first acquiring unit 1, ZC root sequence index is carried out in community to be allocated and distributes, until the number of community 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 community to be allocated of leading form 0-3, by the sequencing of large radius high speed community, minor radius high speed community, large radius low speed community, minor radius low speed community, according to above-mentioned cell type and Ncs value, ZC root sequence index is carried out in community to be allocated and distribute.

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 community to be allocated, can distribute the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy according to low speed cell reuse to be allocated.Such as, the low speed community to be allocated root sequence index that both reusable low speed has distributed community to distribute, the root sequence index that also reusable has distributed community to distribute at a high speed; And/or,

For the community to be allocated of leading format 4, can distribute the mode of the root sequence index that community 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 in above embodiment also can comprise:

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

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

Determine subelement 41, for determine the number N of required ZC root sequence index according to the Ncs value of community to be allocated, and according to above-mentioned N, determine and treat multiplexing set collection, wherein, described in 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, for obtaining and the above-mentioned set of cells of distribution for the treatment of that multiplexing set is corresponding, above-mentionedly distributed set of cells to comprise to distribute community, the described community of having distributed has been assigned with ZC root sequence index, and, arbitraryly above-mentionedly distributed the ZC root sequence index that community is used to have common factor with the corresponding ZC root sequence index in multiplexing set for the treatment of;

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

Distribute subelement 44, for select the set of cells of distribution of annoyance level minimum between described community to be allocated according to above-mentioned assessed value, N the ZC root sequence index in multiplexing set for the treatment of that set of cells is corresponding of distributing of annoyance level minimum distributed to community 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, for according to formula S core=K ₁layer × K ₂distance asks for respectively community to be allocated and has distributed the multiplexing space between community of distributing in set of cells to mark;

Choose subelement 432, for choosing the minimum value of marking in above-mentioned multiplexing space as above-mentioned assessed value;

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

Community to be allocated and described distributed the interval number of plies between community and obtained the specific implementation of the radius of society value of community to be allocated can be referring to the inventive method part, therefore not to repeat here.

Those of ordinary skills can recognize, 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 is clearly described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can realize described function with distinct methods to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.

Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the device of foregoing description and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.

In the several embodiment that provide in the application, should be understood that disclosed apparatus and method can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example multiple 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, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.

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

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

If described integrated unit is realized and during as production marketing independently or use, can be stored in a computer read/write memory medium using the form of SFU software functional unit.Based on such understanding, the all or part of of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out all or part of step of method described in 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, RandomAccessMemory), magnetic disc or CDs.

To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (12)

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

Obtain the parameter of community 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 community and low speed community;

According to described radius of society, be worth ZC zero correlation block configuring area Ncs value;

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

Wherein, when the number of described community to be allocated is greater than zero and available root sequence index while having exhausted, the community to be allocated that is 0-3 to leading Format Type, according to high speed cell reuse to be allocated, distributed at a high speed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy, or, the low speed community to be allocated that is 0-3 to leading Format Type, has distributed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy according to low speed cell reuse to be allocated.

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

The community described to be allocated that is 0-3 to leading Format Type, by the sequencing of large radius high speed community, minor radius high speed community, large radius low speed community, minor radius low speed community, according to described cell type and Ncs value, ZC root sequence index is carried out in described community to be allocated and distribute.

3. the method for claim 1, is characterized in that, described multiplexing allocation strategy comprises:

The number N that determines required ZC root sequence index according to the Ncs value of community to be allocated, described N is positive integer;

According to described N, determine and treat multiplexing set collection, wherein, described in treat that multiplexing set concentrates each treat that multiplexing set comprises N continuous ZC root sequence index;

Obtain and the described set of cells of distribution for the treatment of that multiplexing set is corresponding, describedly distributed set of cells to comprise to distribute community, the described community of having distributed has been assigned with ZC root sequence index, and, distributed the ZC root sequence index that community is used to have common factor with the corresponding ZC root sequence index in multiplexing set for the treatment of described in each;

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

According to described assessed value, select the set of cells of distribution of annoyance level minimum between described community to be allocated, N the ZC root sequence index in multiplexing set for the treatment of that set of cells is corresponding of distributing of described annoyance level minimum distributed to described community to be allocated.

4. method as claimed in claim 3, is characterized in that, describedly to each, has distributed set of cells to carry out multiplexing space evaluates calculation, and the specific implementation that obtains assessed value comprises:

According to formula S core=K ₁layer × K ₂distance asks for respectively community to be allocated and has distributed in set of cells and distributed the multiplexing space between community to mark;

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

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

5. method as claimed in claim 4, is characterized in that, described community to be allocated and describedly distributed the interval number of plies between community to obtain in the following way:

Take described community to be allocated and described position, the site line that has distributed community, as diameter, justify, the sector number in the whole network falls into circle is as described community to be allocated and distributed the interval number of plies between community.

6. the method for claim 1, is characterized in that, described in obtain the radius of society value of community to be allocated specific implementation be:

Add up the primary service area of community to be allocated;

Distance between the subdistrict position of community to be allocated described in the distance of described primary service area the inside covering point and described subdistrict position is farthest as expection covering radius;

Described expection covering radius is multiplied by constant factor, as the radius of society value of described community to be allocated.

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

The first acquiring unit, obtains the parameter of community 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 community and low speed community;

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

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

Multiplexing Unit, for be greater than zero and available root sequence index while having exhausted when the number of community to be allocated, according to high speed cell reuse to be allocated, distributed at a high speed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy, or, the low speed community to be allocated that is 0-3 to leading Format Type, has distributed the mode of the root sequence index that community distributes to carry out multiplexing allocation strategy according to low speed cell reuse to be allocated.

8. device as claimed in claim 7, is characterized in that, described allocation units, are further used for:

The community to be allocated that is 0-3 to leading Format Type, by the sequencing of large radius high speed community, minor radius high speed community, large radius low speed community, minor radius low speed community, according to described cell type and Ncs value, ZC root sequence index is carried out in community to be allocated and distribute.

9. device as claimed in claim 7, is characterized in that, described Multiplexing Unit comprises:

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

Distributed set of cells to obtain subelement, for obtaining and the described set of cells of distribution for the treatment of that multiplexing set is corresponding, describedly distributed set of cells to comprise to distribute community, the described community of having distributed has been assigned with ZC root sequence index, and, distributed the ZC root sequence index that community is used to have common factor with the corresponding ZC root sequence index in multiplexing set for the treatment of described in arbitrary;

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

Distribute subelement, for select the set of cells of distribution of annoyance level minimum between described community to be allocated according to described assessed value, N the ZC root sequence index in multiplexing set for the treatment of that set of cells is corresponding of distributing of described annoyance level minimum distributed to described community to be allocated.

10. device as claimed in claim 9, is characterized in that, described multiplexing space assessment subelement comprises:

Scoring subelement, for according to formula S core=K ₁layer × K ₂distance asks for respectively community to be allocated and has distributed the multiplexing space between community of distributing in set of cells to mark;

Choose subelement, for choosing the minimum value of marking in described multiplexing space as described assessed value;

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

11. devices as claimed in claim 10, is characterized in that, described community to be allocated and describedly distributed the interval number of plies between community to obtain in the following way:

Take described community to be allocated and described position, the site line that has distributed community, as diameter, justify, the sector number in the whole network falls into circle is as described community to be allocated and distributed the interval number of plies between community.

12. devices as claimed in claim 7, is characterized in that, described in obtain the radius of society value of community to be allocated specific implementation be:

Add up the primary service area of community to be allocated;

Distance between the subdistrict position of community to be allocated described in the distance of described primary service area the inside covering point and described subdistrict position is farthest as expection covering radius;

Described expection covering radius is multiplied by constant factor, as the radius of society value of described community to be allocated.

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