CN106817185A - A kind of root sequence optimisation method and device - Google Patents
A kind of root sequence optimisation method and device Download PDFInfo
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- CN106817185A CN106817185A CN201510856345.1A CN201510856345A CN106817185A CN 106817185 A CN106817185 A CN 106817185A CN 201510856345 A CN201510856345 A CN 201510856345A CN 106817185 A CN106817185 A CN 106817185A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012163 sequencing technique Methods 0.000 claims abstract description 60
- 230000008685 targeting Effects 0.000 claims abstract description 60
- 238000001514 detection method Methods 0.000 claims description 20
- 230000004044 response Effects 0.000 claims description 7
- 230000002452 interceptive effect Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 101100396152 Arabidopsis thaliana IAA19 gene Proteins 0.000 description 9
- 101100274486 Mus musculus Cited2 gene Proteins 0.000 description 9
- 101150096622 Smr2 gene Proteins 0.000 description 9
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 6
- 102100039292 Cbp/p300-interacting transactivator 1 Human genes 0.000 description 6
- 101000888413 Homo sapiens Cbp/p300-interacting transactivator 1 Proteins 0.000 description 6
- 238000005457 optimization Methods 0.000 description 4
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- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241001347978 Major minor Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/12—Fixed resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
- H04J11/0056—Inter-base station aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/30—Special cell shapes, e.g. doughnuts or ring cells
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a kind of root sequence optimisation method and device, it is related to wireless communication technology, method to include：When current area has targeting sequencing and conflicts with other cells, by searching for all cells in neighboring cell search region, obtain in the neighboring cell search region and used root arrangement set；There are all cells of overlapping coverage area by search in each perimeter acquisition region for gradually expanding outside the neighboring cell search region with current area, obtain in each perimeter acquisition region and used root arrangement set, until meeting 64 quantitative requirements of targeting sequencing of generation just using the root sequence in the available root arrangement set for having been determined with root arrangement set for currently having obtained；The current area can be distributed to the root sequence in root arrangement set by described, to substitute the root sequence in preceding distribution.The present invention can be prevented effectively between the super remote covering of cell or the cell of non-configuring adjacent cell relation using same preamble sequence interfering for producing.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of root sequence optimisation method and device.
Background technology
It is adjacent small in order to prevent in Long Term Evolution (Long Term Evolution, LTE) system of standard
Physical Random Access Channel (Physical Random Access Channel, the PRACH) resource in area has punching
It is prominent, it is necessary to which that any one-dimensional of code domain, time domain or frequency domain in PRACH resources makes a distinction neighbor cell.By
It is more in usable logical root sequence number, distinguish adjacent small typically by the code domain resource of PRACH
Area, that is, configure unduplicated logical root sequence to neighbor cell, and a cell is by 64 targeting sequencings fixing
The code domain resource of PRACH is constituted, this 64 targeting sequencings are produced by logical root sequence.Root sequence
Needs are planned at the networking initial stage, for the targeting sequencing for ensureing to be generated by logical root sequence between neighbor cell
It is different.The network operation stage or detect targeting sequencing conflict when, carry out Automatic Optimal adjustment.
Third generation partner program (3rd Generation Partnership Project, 3GPP) agreement
32.521 regulation RACH (Random Access Channel, RACH) optimizations should minimum degree
Manual intervention is reduced, but not yet explicitly specifies specific automatic optimization method.
For root sequence collision detection, when mainly being updated according to X2 foundation or X2, interactive adjacent area PRACH
Information is detected whether detection occurs root sequence conflict between adjacent area, for the cell for not configuring X2 couplings
To the situation that the conflict of root sequence occurs, this detection method cannot effective detection.
RACH Automatic Optimals mainly include following two methods：
1. all available arrangement sets of this cell are obtained based on abutting subdistrict, be then randomly assigned one group of root
Sequence is to current area.
This method can solve it is different from the targeting sequencing for being configured with syntople cell, but for super remote covering
The situation about interfering produced using same preamble sequence between the cell of non-configuring adjacent cell relation, it is this
Method cannot be solved.
2. X2 links are used, the PRACH information of the second base station is received according to first base station, to local
PRACH base station configuration informations are adjusted accordingly, small to reduce first base station administration cell and the administration of the second base station
Interference between area.
This method is substantially identical with the first, i.e., cannot solve due to super remote covering and non-configuring adjacent cell relation
Cell between using same preamble sequence interfering for producing.
The content of the invention
It is an object of the invention to provide a kind of root sequence optimisation method and device, can be small better by being reduced to
Area distributes the probability of same root sequence, solves minizone because producing what is interfered to ask using same preamble sequence
Topic.
According to an aspect of the invention, there is provided a kind of root sequence optimisation method, including：
When with other cells there is targeting sequencing when current area and conflicting, searched by neighboring cell search region
Suo Suoyou cells, obtain in the neighboring cell search region and have used root arrangement set；
By search in each perimeter acquisition region for gradually expanding outside the neighboring cell search region with
Current area has all cells of overlapping coverage area, obtains in each perimeter acquisition region and has used root sequence
Set, until using the root sequence in the available root arrangement set for having been determined with root arrangement set for currently having obtained
Row meet 64 quantitative requirements of targeting sequencing of generation just；
The current area can be distributed to the root sequence in root arrangement set by described, to substitute in preceding distribution
Root sequence.
Preferably, obtain in neighboring cell search region used root arrangement set before, also including for examining
Survey the following steps that current area conflicts with other cells with the presence or absence of targeting sequencing：
If the current area receives the targeting sequencing conflicting information of the user equipment of Stochastic accessing, it is determined that when
There is targeting sequencing with other cells and conflict in preceding cell；
Wherein, to be the user equipment connect receiving multiple cells and respond it the targeting sequencing conflicting information at random
The information of the current area is reported during the accidental access response for entering request and replying.
Preferably, obtained in neighboring cell search region by following steps and used root arrangement set：
All cells are searched in the range of neighboring cell search, the Physical Random Access Channel letter of all cells is obtained
Breath；
According to the Physical Random Access Channel information of acquired all cells, the neighboring cell search model is obtained
Root arrangement set has been used in enclosing.
Preferably, obtained in each perimeter acquisition region by following steps and used root arrangement set：
The azimuth of deflection, the current area and other cells according to the current area, it is determined that in institute
State all cells with current area in each perimeter acquisition region with overlapping coverage area；
According to there is all small of overlapping coverage area with current area in identified each perimeter acquisition region
The Physical Random Access Channel information in area, obtains having used root arrangement set in described each perimeter acquisition region.
Preferably, determine that root arrangement set can be used by following steps：
By having used in root arrangement set and described each perimeter acquisition region in the neighboring cell search region
Used root arrangement set merge, obtain having used root sequence total collection；
Root sequence total collection has been used described in being removed in root sequence total collection, available root arrangement set has been obtained.
According to another aspect of the present invention, there is provided a kind of root sequence optimisation device, including：
First search module, when conflicting for there is targeting sequencing with other cells when current area, by phase
All cells are searched in adjacent cell region of search, is obtained in the neighboring cell search region and has been used root sequence sets
Close；
Second search module, for each annular by gradually expanding outside the neighboring cell search region
Search has all cells of overlapping coverage area with current area in region of search, obtains each perimeter acquisition area
Root arrangement set is used in domain, until using the available root for having been determined with root arrangement set for currently having obtained
Root sequence in arrangement set meets 64 quantitative requirements of targeting sequencing of generation just；
Root sequence distribute module, for by it is described can be distributed to the root sequence in root arrangement set it is described current small
Area, to substitute the root sequence in preceding distribution.
Preferably, also include：
Collision detection module, the targeting sequencing for receiving the user equipment of Stochastic accessing in the current area
During conflicting information, determine that current area has targeting sequencing and conflicts with other cells, wherein, the targeting sequencing
Conflicting information is the user equipment random to be connect receive that multiple cells respond its random access request and reply
Enter the information that the current area is reported when responding.
Preferably, first search module searches for all cells in the range of neighboring cell search, obtains all
The Physical Random Access Channel information of cell, and believed according to the Physical Random Access Channel of acquired all cells
Breath, obtains having used root arrangement set in the range of the neighboring cell search.
Preferably, second search module according to the deflection of the current area, the current area and its
The azimuth of its cell, it is determined that there is overlapping coverage area with current area in described each perimeter acquisition region
All cells, and according to there is overlapping coverage area with current area in identified each perimeter acquisition region
All cells Physical Random Access Channel information, obtain having used root sequence in described each perimeter acquisition region
Row set.
Preferably, second search module by the neighboring cell search region used root arrangement set and
Root arrangement set of having used in described each perimeter acquisition region merges, and obtains having used root sequence total collection, and
Root sequence total collection has been used described in removal in described sequence total collection, available root arrangement set has been obtained.
Compared with prior art, the beneficial effects of the present invention are：
The present invention can be reduced to cell distribute same root sequence probability, be prevented effectively from cell it is super it is remote cover or
Between the cell of non-configuring adjacent cell relation using same preamble sequence interfering for producing, improve and access into
The performance of power and the whole network.
Brief description of the drawings
Fig. 1 is provided in an embodiment of the present invention sequence optimisation method flow diagram；
Fig. 2 is provided in an embodiment of the present invention sequence optimisation device block diagram；
Fig. 3 is collision detection provided in an embodiment of the present invention and Optimizing Flow figure；
Fig. 4 is collision detection flow chart provided in an embodiment of the present invention；
Fig. 5 is collision detection schematic diagram provided in an embodiment of the present invention；
Fig. 6 is provided in an embodiment of the present invention sequence optimisation flow chart；
Fig. 7 is the flexible schematic diagram in provided in an embodiment of the present invention sequence optimisation region of search；
Fig. 8 is that related cell provided in an embodiment of the present invention calculates schematic diagram.
Specific embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, it will be appreciated that described below
Preferred embodiment be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Fig. 1 is provided in an embodiment of the present invention sequence optimisation method flow diagram, as shown in figure 1, step includes：
Step S10：When with other cells there is targeting sequencing when current area and conflicting, searched by neighbor cell
All cells are searched in rope region, is obtained in neighboring cell search region and has been used root arrangement set.
Specifically, all cells are searched in the range of neighboring cell search, the physical accidental of all cells is obtained
Access channel information, according to the Physical Random Access Channel information of acquired all cells, obtains neighbor cell
Root arrangement set has been used in hunting zone.For example, centered on this cell, with neighboring cell search radius R0
Border circular areas in obtain the Physical Random Access Channel information of all cells, so as to obtain in the border circular areas
The root sequence for having used, to form and used root arrangement set in the range of neighboring cell search.
Step S20：By being searched in each perimeter acquisition region for gradually expanding outside neighboring cell search region
Rope has all cells of overlapping coverage area with current area, obtains in each perimeter acquisition region and has used root
Arrangement set, until using in the available root arrangement set for having been determined with root arrangement set for currently having obtained
Root sequence meets 64 quantitative requirements of targeting sequencing of generation just
The azimuth of deflection, current area and other cells specifically, according to current area, it is determined that
There is overlapping coverage area with current area in each perimeter acquisition region outside neighboring cell search region
All cells, and according in each the perimeter acquisition region outside identified neighboring cell search region with it is current
Cell has the Physical Random Access Channel information of all cells of overlapping coverage area, obtains each perimeter acquisition
Root arrangement set has been used in region.For example, in radius R0On the basis of, search radius increase Rstep, now,
Being obtained first in increased perimeter acquisition region may have all small of overlapping coverage area with current area
The Physical Random Access Channel information in area, and according to acquired Physical Random Access Channel information, obtain corresponding
Used root sequence, so as to formed in the perimeter acquisition region use root sequence.
Root will have been used in neighboring cell search region with root arrangement set and each perimeter acquisition region
Arrangement set merges, and obtains having used root sequence total collection, and is removed in root sequence total collection and used root sequence total
Set, obtains available root arrangement set.
According to by closely gradually expanding region of search to remote order, until the root in the available root arrangement set for obtaining
Sequence meets 64 quantitative requirements of targeting sequencing of generation just.
Step S40：Current area will can be distributed to the root sequence in root arrangement set, to substitute in preceding distribution
Root sequence, so as to generate 64 targeting sequencings using newly assigned sequence.
It should be noted that the present invention can also detect whether are current area and other cells before step S10
There is targeting sequencing conflict, specifically, if current area receives the leading sequence of the user equipment of Stochastic accessing
Row conflicting information, it is determined that current area has targeting sequencing and conflicts with other cells, wherein, targeting sequencing punching
Prominent information is that user equipment is receiving the accidental access response that multiple cells respond its random access request and reply
When report the information of current area.In other words, user equipment sends during Stochastic accessing to cell
Random access request, and wait cell to reply accidental access response, if receiving multiple in the user equipment short time
(such as 2,3 etc.) accidental access response message, illustrates to be deposited in the presence of the targeting sequencing of more than one cell
In conflict, cell transmission targeting sequencing conflicting information that now user equipment is accessed to it makes the cell start root
Sequence optimisation flow.
Fig. 2 is provided in an embodiment of the present invention sequence optimisation device block diagram, as shown in Fig. 2 device includes the
One search module 20, the second search module 30 and root sequence distribute module 40.
First search module 20 is used to when current area there is targeting sequencing with other cells when conflicting, by
All cells are searched in neighboring cell search region, is obtained in neighboring cell search region and has been used root sequence sets
Close.First search module 20 detect the presence of targeting sequencing conflict when, in the range of neighboring cell search
The Physical Random Access Channel information of all cells for searching, obtains having used root in the range of neighboring cell search
Arrangement set.
Second search module 30 is used to be searched by each annular gradually expanded outside neighboring cell search region
Search has all cells of overlapping coverage area with current area in rope region, obtains each perimeter acquisition region
Interior has used root arrangement set, until using the available root sequence for having been determined with root arrangement set for currently having obtained
Root sequence in row set meets 64 quantitative requirements of targeting sequencing of generation just.Specifically, second search
Rope module 30 is possible to have overlapped coverage with current area according in each the perimeter acquisition region for having extended
The Physical Random Access Channel information of the cell in region, obtains having used root sequence sets in each perimeter acquisition region
Close.Second search module 30 will use root arrangement set and each perimeter acquisition in neighboring cell search region
Root arrangement set of having used in region merges, and obtains having used root sequence total collection, and in root sequence total collection
Except root sequence total collection has been used, available root arrangement set is obtained.Second search module 30 is according to by closely to remote
Order gradually expands region of search, until the root sequence in the available root arrangement set for obtaining meets generation just
64 quantitative requirements of targeting sequencing.
Root sequence distribute module 40 is used to that current area will can be distributed to the root sequence in root arrangement set, with
Substitute the root sequence in preceding distribution.
Device can further include collision detection module 10, and collision detection module 10 is used to detect current small
Whether area has targeting sequencing with other cells conflicts, and specifically, collision detection module 10 is in current area
When receiving the targeting sequencing conflicting information of the user equipment of Stochastic accessing, determine that current area is deposited with other cells
In targeting sequencing conflict, wherein, targeting sequencing conflicting information be user equipment receive multiple cells respond its with
Machine access request and reply accidental access response when report the information of current area.
Fig. 3 is collision detection provided in an embodiment of the present invention and Optimizing Flow figure, as shown in figure 3, step includes：
Step S100：UE reports collision detection.
UE be initially accessed or based on competition incision (i.e. cell switching), using major-minor signal, realize frequency and
Time synchronized, according to host system message block (Master Information Block, MIB)/system information block
(System Information Block, SIB) broadcast message, after completing down-going synchronous, into connecing at random
Enter flow, UE sends a piece of news (Message1, MSG1), i.e. random access request message to base station,
Base station can send Article 2 message (Message2, MSG2), i.e. accidental access response message to UE, if preceding
Lead sequence not conflict, UE can only receive a MSG2 for normal cell；If UE receives two base stations simultaneously
The MSG2 for sending, and parse one of those, illustrate normally to parse cell exist with other cells it is leading
Sequence conflicts, and there is targeting sequencing conflict because normal cell is not aware that, it is therefore desirable to which UE notifies normal small
Area its detect targeting sequencing conflicting information, it is desirable to normal cell proceed by conflict optimization.
Step S200：Based on the Automatic Optimal that azimuth and flexible search radius are combined.
Centered on this cell, with radius as R0Border circular areas in obtain the PRACH of all cells, obtain
Root arrangement set S is used0.It should be noted that centered on this cell, with radius as R0Border circular areas
In cell be this cell and the neighbor cell of this cell.
With RNIt is radius, by expanding RNIncrease region of search, in region of search, according to azimuth and direction
Angle information, the related cell to that may have overlapping coverage area with this cell is screened, and is obtained in region and is sieved
The cellular PRACH information selected, and obtain the root sequence S for having usedN.It should be noted that filtered out
Cell is that may have the related cell of overlapping coverage area in region outside neighbor cell with this cell.
Search radius are bigger, more with root sequence, use root sequence sum SallRemove (S0∪SN), obtain
Root arrangement set S can be usedR,avail, and if only if, and optimal search radius are RmaxWhen, can be with root arrangement set just
Meet the numbers requirement of 64 targeting sequencings of generation, now, the probability of root sequence conflict can also drop to minimum.
Fig. 4 is collision detection flow chart provided in an embodiment of the present invention, as shown in figure 4, reported based on UE
The step of targeting sequencing collision detection, includes：
Step S101：UE is initially accessed or the incision based on competition, and UE completes cell according to MIB/SIB information
After search procedure, start to initiate random access procedure.
Step S102：UE randomly chooses a targeting sequencing in the targeting sequencing for defining, and small to base station
Area sends MSG1.
Step S103：UE judges whether while receive two MSG2, if so, step S105 is then performed, otherwise
Perform step S104.
When base station cell receives the MSG1 of UE, MSG2, under normal circumstances, only one of which can be sent to UE
Cell replys MSG2 to UE；If in certain hour (such as in 10ms), UE receives two MSG2,
Show that the MSG1 of UE present positions is parsed and responded by two base station cells, now the two base station cells are present
Targeting sequencing conflict is, it is necessary to adjust root sequence.
Step S104：Detection terminates, and UE proceeds remaining random access procedure.
Step S105：UE detects targeting sequencing conflict, after completing random access procedure, targeting sequencing is rushed
Prominent information reporting is to base station cell.
Step S106：The targeting sequencing conflicting information that base station reports according to UE, carries out root sequence optimisation flow.
Fig. 5 is collision detection schematic diagram provided in an embodiment of the present invention, as shown in figure 5, UE is in current location
MSG1 is sent to base station cell, now, cell 1 and cell 2 receive MSG1, and reply MSG2 to UE.
UE receives more than one MSG2 in a short time, judges that two cells have targeting sequencing conflict.UE is connecing
After entering cell 1, targeting sequencing conflicting information is sent to cell.
Fig. 6 is provided in an embodiment of the present invention sequence optimisation flow chart, as shown in fig. 6, based on azimuth and
The root sequence optimisation step of flexible search radius includes：
Step S201：The longitude and latitude of the whole network cell, orientation between deflection and two cells are obtained by layout data
Angle information.
Step S202：Centered on this cell, with radius as R0Border circular areas in obtain all cellular PRACHs
Information, according to acquired PRACH information, the root arrangement set S of all cells for having been used0。
According to by closely gradually expanding region of search to remote order, until the root in the available root arrangement set for obtaining
Sequence meets 64 quantitative requirements of targeting sequencing of generation just.Specifically according to following steps S203 to step
S209 is performed：
Step S203：Fig. 7 is the flexible schematic diagram in provided in an embodiment of the present invention sequence optimisation region of search, such as
Shown in Fig. 7, with RstepIt is step-length, with flexible search radius RN=R0+N*Rstep, N initial values are 1, and expansion is searched
Rope region, in the perimeter acquisition region for newly increasing, between the deflection and cell pair that are covered according to antenna in cell
Azimuth information, may mutually turn down with this cell in the perimeter acquisition region that acquisition is newly increased in the presence of covering is overlapping
Area.
Fig. 8 is that related cell provided in an embodiment of the present invention calculates schematic diagram, as shown in figure 8, judging a certain small
The step of whether area has covering overlapping region with this cell is as follows：
According to the deflection of cell, ∠ A are defined as, a ray is respectively drawn according to ∠ A ± 120 degree direction, with
Plane is divided into four regions by totally four rays in ∠ A ± 60 degree direction, is respectively defined as S1, S2, S3, S4,
The border composition in four regions is respectively：(∠ A-60, ∠ A+60]；(∠A+60,∠A+120]；(∠A+120,
∠A+240]；(∠A+240,∠A-60].
Using the line of two minizones and 0 degree of angle in direction as azimuth, judge what is searched according to azimuth
The region that cell belongs to, as shown in figure 8, with cell B ∈ S1, deflection ∠ B；Cell C ∈ S2, deflection
∠C；Cell D ∈ S3, deflection ∠ D；As a example by cell E ∈ S4, deflection ∠ E, describe respectively specific
Judgment mode.
As cell B ∈ S1, no matter deflection ∠ B sizes, there is overlapping coverage area with cell A in cell B
Domain.
As cell C ∈ S2, when the scope of two border ∈ ∠ α of deflection ∠ C ± 60, cell C with
There is overlapping coverage area in cell A, otherwise cell C and cell A does not exist overlapping coverage area.Wherein,
The scope of ∠ α is that summit is cell C, and a line is the line of cell A and cell C, and a line is ∠ A+60
The sector region that is formed of parallel lines.
As cell D ∈ S3, when the scope of two border ∈ ∠ β of deflection ∠ D ± 60, cell D with
There is overlapping coverage area in cell A, otherwise cell D and cell A does not exist overlapping coverage area.Wherein,
The scope of ∠ β is that summit is cell D, and a line is the parallel lines of ∠ A+120, and a line is ∠ A+240's
The sector region that parallel lines are formed.
As cell E ∈ S4, when the scope of two border ∈ ∠ γ of deflection ∠ E ± 60, cell E with
There is overlapping coverage area in cell A, otherwise cell E and cell A does not exist overlapping coverage area.Wherein,
The scope of ∠ γ is that summit is cell E, and a line is the line of cell A and cell E, and a line is ∠ A-60
The sector region that is formed of parallel lines.
Step S204：By the PRACH of the overlapping all cells of the presence covering in the perimeter acquisition region that gets
Information, the root arrangement set S that calculating has been usedN, by root arrangement set S0With root arrangement set SNMerging
Calculate, obtain having used root arrangement set Sused。
Step S205：Calculate available arrangement set SR,avail=Sall-(S0∪SN), and judge available
Arrangement set SR,availWhether it is empty, if not being sky, step S206 is performed, if root arrangement set can be used
SR,availIt is sky, then performs step S207.
Step S206：N=N+1, continues to expand region of search, reduces minizone and uses the general of same preamble sequence
Rate.
Step S207：Return, determine available root arrangement set S during N=N-1R,avail=Sall-(S0∪SN)。
Step S208：Judgement can use root arrangement set SR,availIn whether have by cyclic shift NCsBefore generation 64
Root sequence number required for leading sequence, if it has, performing step S209；If not enough, step is continued executing with
S207。
Step S209：First root sequence index of root sequence that return can be used, and automatically configure to working as
Preceding cell is used.
It should be noted that above-mentioned overlapping coverage area refers to that the overlay area of minizone mutually overlaps, including cover together
Lid and part are with covering.
In sum, the present invention has following technique effect：
1st, the present invention reports targeting sequencing conflicting information, effectively during RACH Automatic Optimals by UE
Whether there is root sequence conflict between detection cell, for example, do not configure the cell pair of X2 couplings；
2nd, the present invention is optimized by azimuth and flexible search radius to the cell of root sequence conflict,
In RACH optimization process, stretched by search radius, make to be changed with root sequence index, when reaching
During to optimal search radius, available arrangement set is just met for generating the requirement of leading quantity, maximum journey
Degree is reduced to the probability that cell distributes identity logic root sequence；
3rd, detection range of the invention is maximized, and is advantageously accounted for by the super remote covering of cell or non-configuring adjacent cell
Between the cell of relation using same preamble sequence interfering for producing, raising is successfully accessed rate and the whole network
Performance.
Although being described in detail to the present invention above, the invention is not restricted to this, the art technology
Personnel can carry out various modifications with principle of the invention.Therefore, all modifications made according to the principle of the invention,
All should be understood to fall into protection scope of the present invention.
Claims (10)
1. a kind of root sequence optimisation method, it is characterised in that methods described includes：
When with other cells there is targeting sequencing when current area and conflicting, searched by neighboring cell search region
Suo Suoyou cells, obtain in the neighboring cell search region and have used root arrangement set；
By search in each perimeter acquisition region for gradually expanding outside the neighboring cell search region with
Current area has all cells of overlapping coverage area, obtains in each perimeter acquisition region and has used root sequence
Set, until using the root sequence in the available root arrangement set for having been determined with root arrangement set for currently having obtained
Row meet 64 quantitative requirements of targeting sequencing of generation just；
The current area can be distributed to the root sequence in root arrangement set by described, to substitute in preceding distribution
Root sequence.
2. method according to claim 1, it is characterised in that obtaining in neighboring cell search region
Used root arrangement set before, also including for detecting that current area and other cells whether there is targeting sequencing
The following steps of conflict：
If the current area receives the targeting sequencing conflicting information of the user equipment of Stochastic accessing, it is determined that when
There is targeting sequencing with other cells and conflict in preceding cell；
Wherein, to be the user equipment connect receiving multiple cells and respond it the targeting sequencing conflicting information at random
The information of the current area is reported during the accidental access response for entering request and replying.
3. method according to claim 1, it is characterised in that obtain neighbor cell by following steps
Root arrangement set has been used in region of search：
All cells are searched in the range of neighboring cell search, the Physical Random Access Channel letter of all cells is obtained
Breath；
According to the Physical Random Access Channel information of acquired all cells, the neighboring cell search model is obtained
Root arrangement set has been used in enclosing.
4. method according to claim 1, it is characterised in that obtain each annular by following steps
Root arrangement set has been used in region of search：
The azimuth of deflection, the current area and other cells according to the current area, it is determined that in institute
State all cells with current area in each perimeter acquisition region with overlapping coverage area；
According to there is all small of overlapping coverage area with current area in identified each perimeter acquisition region
The Physical Random Access Channel information in area, obtains having used root arrangement set in described each perimeter acquisition region.
5. method according to claim 1, it is characterised in that determine that root sequence can be used by following steps
Row set：
By having used in root arrangement set and described each perimeter acquisition region in the neighboring cell search region
Used root arrangement set merge, obtain having used root sequence total collection；
Root sequence total collection has been used described in being removed in root sequence total collection, available root arrangement set has been obtained.
6. a kind of root sequence optimisation device, it is characterised in that described device includes：
First search module, when conflicting for there is targeting sequencing with other cells when current area, by phase
All cells are searched in adjacent cell region of search, is obtained in the neighboring cell search region and has been used root sequence sets
Close；
Second search module, for each annular by gradually expanding outside the neighboring cell search region
Search has all cells of overlapping coverage area with current area in region of search, obtains each perimeter acquisition area
Root arrangement set is used in domain, until using the available root for having been determined with root arrangement set for currently having obtained
Root sequence in arrangement set meets 64 quantitative requirements of targeting sequencing of generation just；
Root sequence distribute module, for by it is described can be distributed to the root sequence in root arrangement set it is described current small
Area, to substitute the root sequence in preceding distribution.
7. device according to claim 6, it is characterised in that also include：
Collision detection module, the targeting sequencing for receiving the user equipment of Stochastic accessing in the current area
During conflicting information, determine that current area has targeting sequencing and conflicts with other cells, wherein, the targeting sequencing
Conflicting information is the user equipment random to be connect receive that multiple cells respond its random access request and reply
Enter the information that the current area is reported when responding.
8. device according to claim 6, it is characterised in that first search module is adjacent small
All cells are searched in the range of area searching, the Physical Random Access Channel information of all cells is obtained, and according to institute
The Physical Random Access Channel information of all cells for obtaining, obtains having used in the range of the neighboring cell search
Root arrangement set.
9. device according to claim 6, it is characterised in that second search module is according to
The azimuth of the deflection of current area, the current area and other cells, it is determined that being searched in described each annular
There are all cells of overlapping coverage area with current area in rope region, and searched according to identified each annular
There is the Physical Random Access Channel information of all cells of overlapping coverage area in rope region with current area, obtain
Root arrangement set has been used in described each perimeter acquisition region.
10. device according to claim 6, it is characterised in that second search module is by the phase
Having used in root arrangement set and described each perimeter acquisition region in adjacent cell region of search has used root sequence
Set merges, and obtains use root sequence total collection, and has used root sequence described in being removed in described sequence total collection
Row total collection, obtains available root arrangement set.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510856345.1A CN106817185A (en) | 2015-11-30 | 2015-11-30 | A kind of root sequence optimisation method and device |
| PCT/CN2016/100843 WO2017092497A1 (en) | 2015-11-30 | 2016-09-29 | Method and apparatus for optimizing root sequence |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510856345.1A CN106817185A (en) | 2015-11-30 | 2015-11-30 | A kind of root sequence optimisation method and device |
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| CN111726825A (en) * | 2019-03-22 | 2020-09-29 | 华为技术有限公司 | Communication method and device |
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| CN112087811A (en) * | 2019-06-14 | 2020-12-15 | 普天信息技术有限公司 | Method and device for sending random access preamble |
| CN117119511A (en) * | 2022-05-16 | 2023-11-24 | 中兴通讯股份有限公司 | Root Sequence Index (RSI) conflict processing method, server and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2067275B1 (en) * | 2006-09-11 | 2013-06-05 | LG Electronics Inc. | A method for transmitting and receiving signals based on segmented access scheme, and a method for allocating sequence for the same |
| JP5106969B2 (en) * | 2007-10-01 | 2012-12-26 | 株式会社エヌ・ティ・ティ・ドコモ | User device and cell search method |
| JP4941563B2 (en) * | 2007-10-25 | 2012-05-30 | 富士通株式会社 | Transmission method, radio base station, mobile station, and radio communication system |
| CN104039015B (en) * | 2013-03-05 | 2017-12-05 | 华为技术有限公司 | Distribution method and device, the system of random access resource |
| CN104125574B (en) * | 2013-04-23 | 2017-11-17 | 华为技术服务有限公司 | A kind of ZC roots sequence index redistribution method and device |
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| CN111726825A (en) * | 2019-03-22 | 2020-09-29 | 华为技术有限公司 | Communication method and device |
| US12035379B2 (en) | 2019-03-22 | 2024-07-09 | Huawei Technologies Co., Ltd. | Communication method and apparatus |
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