CN106612502A - Physical cell identifier PCI acquiring method and system - Google Patents
Physical cell identifier PCI acquiring method and system Download PDFInfo
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- CN106612502A CN106612502A CN201610012404.1A CN201610012404A CN106612502A CN 106612502 A CN106612502 A CN 106612502A CN 201610012404 A CN201610012404 A CN 201610012404A CN 106612502 A CN106612502 A CN 106612502A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
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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
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Abstract
The invention provides a physical cell identifier PCI acquiring method and system. The method comprises the steps that a first neighbor cell list of a target cell is acquired when the maximum number of neighbor cells is a first reference value; a first primary synchronization signal value with the minimum number of occurrences of PCIs used by all cells in the first neighbor cell list in all primary synchronization signal values is determined; and in a first set formed by PCIs with all primary synchronization signal values equal to the first primary synchronization signal value, the PCI of the target cell is determined. Compared with the existing cell PCI acquisition method and system, the method and system has the advantages that the PCI of the target cell is determined from a set of PCIs with a low repetition rate with neighbor cell primary synchronization signal values, which reduces the repetition probability of the primary synchronization signal values of the PCIs and the target cell and the PCIs of neighbor cells.
Description
Technical field
The invention belongs to communication technical field, more particularly to a kind of Physical Cell Identifier PCI are obtained
Take method and system.
Background technology
When Physical Cell Identifier PCI planning is carried out, need to meet the principle not conflicted.Do not rush
Prominent principle：Ensure that the neighbor cell Physical Cell Identifier PCI values of certain cell are unequal, and to the greatest extent
Amount selects the optimum Physical Cell Identifier PCI values of interference.If neighbor cell allocation identical thing
Reason cell ID PCI, because at most only one of which cell can be detected by user in overlapping region,
Can only synchronize to one of cell during search of initial zone, and the cell be not necessarily it is most suitable
's.Such case is exactly the situation of cell PCI conflict.
The acquisition base of the Physical Cell Identifier PCI of cell in existing Long Term Evolution LTE system
Result after adjacent section planning.Carry out after adjacent section planning, in lane database Neighboring Cell List preserved,
When Physical Cell Identifier PCI is planned, each cell is according to the physics selected in Neighboring Cell List
Cell ID PCI is determining final Physical Cell Identifier PCI.
At present, when carrying out Physical Cell Identifier PCI planning, a set of Neighboring Cell List is only used, this
Kind of method is when in the neighbor list number is excessive, in the main synchronous letters of distribution Physical Cell Identifier PCI
During the result of number value, if the relatively low distribution PCI of priority in Neighboring Cell List, this can be caused
The PCI conflicts of the higher cell of priority in cell PCI and Neighboring Cell List.
The content of the invention
The present invention provides a kind of acquisition methods of Physical Cell Identifier PCI, can reduce cell
The probability that the master sync signal value of the PCI that PCI is used with adjacent area conflicts.
In a first aspect, the invention provides a kind of acquisition methods of Physical Cell Identifier PCI, bag
Include：Obtain first Neighboring Cell List of the Target cell when maximum adjacent area number is the first reference value；
Determine that all cells are made in first Neighboring Cell List in all master sync signal values
First master sync signal value of the least number of times occurred in PCI；
What the PCI for being equal to the first master sync signal value in all master sync signal values was formed
In first set, the PCI of the Target cell is determined.
Preferably, it is described to be equal to the first master sync signal value in all master sync signal values
In the first set that PCI is formed, the PCI of the Target cell is determined, including：
If all access times are that the second set of zero PCI compositions is in the first set
Nonempty set, determines the PCI of the Target cell in the second set.
Preferably, it is described to be equal to the first master sync signal value in all master sync signal values
In the first set that PCI is formed, the PCI of the Target cell is determined, also include：
Obtain second Neighboring Cell List of the Target cell when maximum adjacent area number is the second reference value；
Second reference value is more than first reference value；
If all in the first set be not included in second Neighboring Cell List, and away from described
The distance of Target cell more than the PCI compositions that the cell of default multiplex distance is used the
Three collection are combined into nonempty set, then the PCI of the Target cell is determined in the described 3rd set.
Preferably, it is characterised in that described to lead equal to described first in all master sync signal values
In the first set that the PCI of synchronizing signal value is formed, the PCI of the Target cell is determined, also
Including：
If all in the first set be not included in second Neighboring Cell List, and away from described
The distance of Target cell is less than or equal to the PCI compositions that the cell of the multiplex distance is used
Four collection are combined into nonempty set, and the PCI of the Target cell is determined in the described 4th set.
Preferably, it is described to be equal to the first master sync signal value in all master sync signal values
In the first set that PCI is formed, the PCI of the Target cell is determined, also include：
If the 4th collection is combined into empty set, selection belong to the cell in second Neighboring Cell List and
The PCI used apart from farthest cell away from the Target cell is used as the Target cell
PCI。
On the other hand, present invention also offers a kind of acquisition system of Physical Cell Identifier PCI,
Including acquisition module, the first determining module and the second determining module；Wherein,
It is the first reference value that the acquisition module is used to obtain Target cell in maximum adjacent area number
When the first Neighboring Cell List；
First determining module is used to determine in all master sync signal values in the acquisition mould
The least number of times occurred in the PCI that all cells are used in the first Neighboring Cell List that block is obtained
The first master sync signal value；
Second determining module is used to determine equal to described first in all master sync signal values
In the first set that the PCI of the first master sync signal value that module is obtained is formed, the mesh is determined
The PCI of mark cell.
Preferably, second determining module includes that the first judging submodule, first determine submodule
Block；
First judging submodule is used to judge that all access times are in the first set
Whether the second set of zero PCI compositions is nonempty set；
First determination sub-module is used for the result that obtains in first judging submodule
When the second set is nonempty set, the Target cell is determined from the second set
PCI。
Preferably, second determining module also include acquisition submodule, the second judging submodule,
Second determination sub-module；
It is the second reference that the acquisition submodule is used to obtain Target cell in maximum adjacent area number
The second Neighboring Cell List during value；Second reference value is more than first reference value；
Second judging submodule is used to judge all in the first set to be not included in institute
In stating the second Neighboring Cell List, and the distance away from the Target cell is more than default multiplex distance
Whether the 3rd set of the PCI compositions that cell is used is nonempty set；
Second determination sub-module is used for the result that obtains in second judging submodule
When 3rd collection is combined into nonempty set, from the described 3rd set the Target cell is determined
PCI。
Preferably, second determining module also includes that the 3rd judging submodule, the 3rd determine son
Module；
3rd judging submodule is used to judge all in the first set to be not included in institute
In stating the second Neighboring Cell List, and the distance away from the Target cell is less than or equal to the multiplex distance
The PCI that used of cell constitute the 4th collection and be combined into nonempty set；
3rd determination sub-module is used for the result that obtains in the 3rd judging submodule
When 4th collection is combined into nonempty set, from the described 4th set the Target cell is determined
PCI。
Preferably, second determining module also includes the 4th determination sub-module；
4th determination sub-module is used for the result that obtains in the 3rd judging submodule
4th collection is when being combined into empty set, and selection belongs to second Neighboring Cell List and little away from the target
PCIs of the PCI that offset is used from farthest cell as the Target cell.
In the acquisition methods and system of cell PCI that the present invention is provided, by the maximum of Target cell
Adjacent area number is set to smaller value, obtains Neighboring Cell List.Obtained using secondary according to the Neighboring Cell List
The minimum master sync signal value of number, chooses target little from the PCI with the master sync signal value
The PCI in area.Because the master sync signal value is the minimum master sync signal value of adjacent area access times,
So the PCI of the Target cell with the master sync signal value believes with the main synchronous of the PCI of adjacent area
Number value recurrence probability it is minimum.
Compare with system with the PCI acquisition methods of existing cell, the cell that the present invention is provided
PCI acquisition methods and system, have and adjacent area master sync signal value low repeatability from one group
The PCI of Target cell is determined in PCI, reduces the PCI's of the Target cell and PCI of adjacent area
The recurrence probability of master sync signal.Meanwhile, by the method and system and cell in prior art
The acquisition methods of PCI and system are combined, it is ensured that before master sync signal value repetitive rate is low
Put, find out the optimal PCI of cell.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below
The accompanying drawing to be used needed for embodiment or description of the prior art will be briefly described, shown
And easy insight, drawings in the following description are some embodiments of the present invention, general for this area
For logical technical staff, on the premise of not paying creative work, can be with attached according to these
Figure obtains other accompanying drawings.
The acquisition methods flow chart of cell PCI that Fig. 1 is provided for one embodiment of the invention；
The acquisition methods flow chart of cell PCI that Fig. 2 is provided for another embodiment of the present invention；
The set relations figure that Fig. 3 chooses for cell PCI that the present invention is provided；
Fig. 4 obtains the schematic diagram of system for cell PCI that another embodiment of the present invention is provided.
Specific embodiment
Embodiment 1：
The present embodiment describes a kind of acquisition methods of Physical Cell Identifier PCI, the acquisition methods
Including step as shown in Figure 1.
Step 100：Obtain first of Target cell when maximum adjacent area number is the first reference value
Neighboring Cell List.
It should be noted that：Target cell is the undetermined cells of a PCI, Target cell
PCI can pass through the method described in the present embodiment and determine.First reference value is default target
The maximum adjacent area number of cell.First Neighboring Cell List is to set the maximum adjacent area number of Target cell
The first reference value is set to, the Neighboring Cell List that adjacent section planning is obtained is carried out to the adjacent area of Target cell.
Adjacent area refers to signal of communication and is coated with the cell for overlapping and existing handoff relation, and a cell can
To there is multiple neighbor cells.
Step 200：Determine in all master sync signal values all cells in the first Neighboring Cell List
First master sync signal value of the least number of times occurred in the PCI for being used.
It should be noted that：Master sync signal value is an ingredient of PCI values, can be by
All PCI points is 3 groups by the value 0,1 and 2 of license-master's synchronizing signal value, and per group includes 168
Individual different mark.
In the step, three master sync signal values of contrast are in the cell for being contained in the first Neighboring Cell List
In the PCI for being used, the number of times that each master sync signal value occurs, the first master sync signal value
It is exactly the minimum master sync signal value of occurrence number.
For example, contrast three master sync signal values is made in the cell for being contained in the first Neighboring Cell List
In PCI, during the number of times that each master sync signal value occurs, master sync signal value is 1
The number of times that PCI occurs is 0, then the first master sync signal value is 1.
Or, three master sync signal values of contrast are made in the cell for being contained in the first Neighboring Cell List
In PCI, during the number of times that each master sync signal value occurs, master sync signal value 0,1
In 2, master sync signal value is that the number of times that 0 PCI with 1 occurs is identical, and is both less than led
The occurrence number of synchronizing signal value 2.Then, contrast is contained in the cell institute of the first Neighboring Cell List
In the PCI for using, master sync signal value is the sum of 0 PCI and master sync signal value is 1
PCI sum, using the few master sync signal value of the sum of PCI as the first main synchronous letter
Number value.Further, if master sync signal value 0 and the PCI corresponding to master sync signal value 1
It is total identical, then the first master sync signal value is master sync signal value 0 or master sync signal value
Any one in 1.
Step 300：The PCI shapes of the first master sync signal value are equal in all master sync signal values
Into first set in, determine the PCI of Target cell.
It should be noted that：First set is that master sync signal value is equal to the first master sync signal value
All PCI, have 168 different PCI of auxiliary synchronous signals value.
In the acquisition methods of the physical area PCI that the present embodiment is recorded, by the maximum of Target cell
Adjacent area number is set to smaller value, obtains Neighboring Cell List.Obtained using secondary according to the Neighboring Cell List
The minimum master sync signal value of number, chooses target little from the PCI with the master sync signal value
The PCI in area.Because the master sync signal value is the minimum master sync signal value of adjacent area access times,
So the PCI of the Target cell with the master sync signal value believes with the main synchronous of the PCI of adjacent area
Number value recurrence probability it is minimum.
Compared with the PCI acquisition methods of existing cell, cell PCI that the present embodiment is recorded
Acquisition methods, from one group of PCI having with adjacent area master sync signal value low repeatability mesh is determined
The PCI of mark cell, reduces the master sync signal of the PCI of Target cell and the PCI of adjacent area
Recurrence probability.
Embodiment 2：
The present embodiment content of the invention in conjunction with the embodiments described in 1, gives another kind of determination little
The method of area PCI, specific flow chart is as shown in Figure 2.
As shown in Fig. 2 the step of step 100 and step 200 are with described in embodiment 1 100
It is identical with step 200.Except for the difference that：
Step 301：Judge to be equal to the first master sync signal value in all master sync signal values
In the first set that PCI is formed, access times are whether the second set of zero PCI compositions is
Empty set.
It should be noted that：It is also to be not yet assigned to any cell that access times are zero PCI
PCI。
The first set phase in step 300 in first set in step 301 and embodiment 1
Together, except for the difference that, need first to judge the PCI that number of times used in first set is zero in the step
Whether the second set of composition is empty set.If second set is nonempty set, from second set
Determine the PCI of Target cell.Specifically, the arbitrary PCI in second set is chosen as target
The PCI of cell.If second set is empty set, execution step 302.
Step 302：Obtain second of Target cell when maximum adjacent area number is the second reference value
Neighboring Cell List.Wherein, the second reference value is more than the first reference value.
It should be noted that：Second reference value is the maximum adjacent area number of default Target cell.
Second reference value is more than the first reference value.Second Neighboring Cell List is by the maximum adjacent area of Target cell
Number is set to the second reference value, and to the adjacent area of Target cell the adjacent area that adjacent section planning is obtained is carried out
List.
Step 303：Judge to be not included in first set in the second Neighboring Cell List, and away from target
Threeth collection of the distance of cell more than the PCI compositions that the cell of default multiplex distance is used
Whether conjunction is empty set.
It should be noted that：Multiplex distance is to prevent the signal of neighbor cell from disturbing what is arranged
Distance, needs to meet minimum multiplex distance using the distance between two cells of identical PCI.
If second set is empty set, need to judge to be not included in second in first set in the step
In Neighboring Cell List, and the distance away from Target cell is used more than the cell of default multiplex distance
PCI composition the 3rd set whether be empty set.If the 3rd collection is combined into nonempty set, from the 3rd
The PCI of Target cell is determined in set.Further, choose the 3rd set used in number of times most
PCIs of few PCI as Target cell.If the 3rd collection is combined into empty set, execution step 304.
Step 304：Judge to be not included in first set in the second Neighboring Cell List, and away from target
Fourth set of the distance of cell less than or equal to the PCI compositions that the cell of multiplex distance is used
Whether it is empty set.
If the 3rd collection is combined into empty set, judge to be not included in the second Neighboring Cell List in first set
In, and the distance away from Target cell is less than or equal to the PCI compositions that the cell of multiplex distance is used
The 4th set whether be empty set.If the 4th collection is combined into nonempty set, determine from the 4th set
The PCI of Target cell.Further, choose the 4th and gather middle-range Target cell apart from farthest
PCIs of the PCI that cell is used as Target cell.If the 4th collection is combined into empty set, step is performed
Rapid 305.
Step 305：Selection belongs to cell in second Neighboring Cell List and little away from the target
PCIs of the PCI that offset is used from farthest cell as the Target cell.
If the 4th collection is combined into empty set, selection belongs to the cell in second Neighboring Cell List and away from institute
PCI that Target cell used apart from farthest cell is stated as the PCI of the Target cell.
It is first set, second set in the present embodiment, the 3rd set, the 4th set, concrete
Implication and each set between relation it is as shown in Figure 3.
It is all main synchronous letter in step 301 as Fig. 3, set S1 are first set
Number value equal to the first master sync signal value PCI formed set.Set S2 is the second collection
Close, be used in first set S1 in step 301 number of times be zero PCI composition set.
Set S3 is the 3rd set, in being step 303, second is not included in first set S1
In Neighboring Cell List, and the distance away from Target cell is used more than the cell of default multiplex distance
PCI composition set.Set S4 is the 4th set, is first set in step 304
During the second Neighboring Cell List is not included in S1, and the distance away from Target cell is less than or equal to multiplexing
The set of the PCI compositions that the cell of distance is used.Set S5 is belonged in first set S1
The set of the cell in the second Neighboring Cell List.Be exactly in step 305 from set S5 choose with
PCIs of the PCI that Target cell is used apart from farthest cell as Target cell.
S6 in Fig. 3 is the set of PCI of the number of times more than or equal to 1 used in first set S1,
Set S7 is that the distance away from Target cell is less than or equal to the PCI that the cell of multiplex distance is used
Set.
The relation of each set is as illustrated, S1 is the complete of set S2, S3, S4, S5, S6
Collection.Second set S2 is the S6 i.e. S2=C of the supplementary set in first set S1S1S6.Namely
Say, first set S1 is big by second set S2 and access times of the PCI that access times are zero
Constitute in the set S6 equal to 1.
3rd set S3 is supplementary set of the union of set S7 and set S5 in set S6,
That is S3=CS6(S7 ∪ S5), the 4th set S4 is the common factor of set S7 and set S5 in collection
The supplementary set closed in S7 is S4=CS7(S7∩S5)。
In the acquisition methods of the physical area PCI that the present embodiment is recorded, by the maximum of Target cell
Adjacent area number is set to smaller value, obtains Neighboring Cell List.Obtained using secondary according to the Neighboring Cell List
The minimum master sync signal value of number, chooses target little from the PCI with the master sync signal value
The PCI in area.Because the master sync signal value is the minimum master sync signal value of adjacent area access times,
So the PCI of the Target cell with the master sync signal value believes with the main synchronous of the PCI of adjacent area
Number value recurrence probability it is minimum.
Compared with the PCI acquisition methods of existing cell, cell PCI that the present embodiment is recorded
Acquisition methods, from one group of PCI having with adjacent area master sync signal value low repeatability mesh is determined
The PCI of mark cell, reduces the master sync signal of the PCI of Target cell and the PCI of adjacent area
Recurrence probability.Meanwhile, the method is combined with the acquisition methods of cell PCI in prior art,
Can ensure that on the premise of master sync signal value repetitive rate is low, find out the optimal PCI of cell.
Embodiment 3：
The present embodiment records a kind of acquisition system of Physical Cell Identifier PCI, including obtains mould
Block, the first determining module and the second determining module.
As shown in figure 4, the outfan of acquisition module connects the input of the first determining module, the
The outfan of one determining module connects the input of the second determining module.
Acquisition module is used to obtain Target cell when maximum adjacent area number is the first reference value
First Neighboring Cell List.
It should be noted that Target cell is the undetermined cells of a PCI, Target cell
PCI can pass through the method described in the present embodiment and determine.First reference value is default target
The maximum adjacent area number of cell.First Neighboring Cell List acquisition module is adjacent by the maximum of Target cell
Area's number is set under conditions of the first reference value, and to the adjacent area of Target cell adjacent section planning is carried out
Obtain the first Neighboring Cell List.
First determining module is used to determine what is obtained in acquisition module in all master sync signal values
First master of the least number of times occurred in the PCI that all cells are used in the first Neighboring Cell List
Synchronizing signal value；
It should be noted that：First determining module obtains the first main synchronous letter using Statistical Comparison
Number value, but not limited to this method.First determining module is defeated by the first master sync signal value for obtaining
Go out to the second result determining module.
Second determining module is used to be obtained equal to the first determining module in all master sync signal values
The first master sync signal value PCI formed first set in, determine the PCI of Target cell.
In the acquisition system of the physical area PCI that the present embodiment is recorded, by the maximum of Target cell
Adjacent area number is set to smaller value, obtains Neighboring Cell List.Obtained using secondary according to the Neighboring Cell List
The minimum master sync signal value of number, chooses target little from the PCI with the master sync signal value
The PCI in area.Because the master sync signal value is the minimum master sync signal value of adjacent area access times,
So the PCI of the Target cell with the master sync signal value believes with the main synchronous of the PCI of adjacent area
Number value recurrence probability it is minimum.
Compared with the PCI of existing cell obtains system, cell PCI that the present embodiment is recorded
Acquisition methods, from one group of PCI having with adjacent area master sync signal value low repeatability mesh is determined
The PCI of mark cell, reduces the master sync signal of the PCI of Target cell and the PCI of adjacent area
Recurrence probability.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to,
For a person skilled in the art, the present invention can have various modifications and variations.It is all this
Within the spirit and principle of invention, any modification, equivalent substitution and improvements made etc. all should
It is included within protection scope of the present invention.
Claims (10)
1. a kind of acquisition methods of Physical Cell Identifier PCI, it is characterised in that include：
Obtain first Neighboring Cell List of the Target cell when maximum adjacent area number is the first reference value；
Determine that all cells are made in first Neighboring Cell List in all master sync signal values
First master sync signal value of the least number of times occurred in PCI；
What the PCI for being equal to the first master sync signal value in all master sync signal values was formed
In first set, the PCI of the Target cell is determined.
2. acquisition methods of Physical Cell Identifier PCI according to claim 1, it is special
Levy and be, the PCI that the first master sync signal value is equal in all master sync signal values
In the first set of formation, the PCI of the Target cell is determined, including：
If all access times are that the second set of zero PCI compositions is in the first set
Nonempty set, determines the PCI of the Target cell in the second set.
3. acquisition methods of Physical Cell Identifier PCI according to claim 2, it is special
Levy and be, the PCI that the first master sync signal value is equal in all master sync signal values
In the first set of formation, the PCI of the Target cell is determined, also include：
Obtain second Neighboring Cell List of the Target cell when maximum adjacent area number is the second reference value；
Second reference value is more than first reference value；
If all in the first set be not included in second Neighboring Cell List, and away from described
The distance of Target cell more than the PCI compositions that the cell of default multiplex distance is used the
Three collection are combined into nonempty set, then the PCI of the Target cell is determined in the described 3rd set.
4. acquisition methods of Physical Cell Identifier PCI according to claim 3, it is special
Levy and be, it is characterised in that be described to be equal to the described first main synchronization in all master sync signal values
In the first set that the PCI of signal value is formed, the PCI of the Target cell is determined, also include：
If all in the first set be not included in second Neighboring Cell List, and away from described
The distance of Target cell is less than or equal to the PCI compositions that the cell of the multiplex distance is used
Four collection are combined into nonempty set, and the PCI of the Target cell is determined in the described 4th set.
5. acquisition methods of Physical Cell Identifier PCI according to claim 4, it is special
Levy and be, the PCI that the first master sync signal value is equal in all master sync signal values
In the first set of formation, the PCI of the Target cell is determined, also include：
If the 4th collection is combined into empty set, selection belong to the cell in second Neighboring Cell List and
The PCI used apart from farthest cell away from the Target cell is used as the Target cell
PCI。
6. a kind of acquisition system of Physical Cell Identifier PCI, it is characterised in that including acquisition
Module, the first determining module and the second determining module；Wherein,
It is the first reference value that the acquisition module is used to obtain Target cell in maximum adjacent area number
When the first Neighboring Cell List；
First determining module is used to determine in all master sync signal values in the acquisition mould
The least number of times occurred in the PCI that all cells are used in the first Neighboring Cell List that block is obtained
The first master sync signal value；
Second determining module is used to determine equal to described first in all master sync signal values
In the first set that the PCI of the first master sync signal value that module is obtained is formed, the mesh is determined
The PCI of mark cell.
7. the acquisition system of a kind of Physical Cell Identifier PCI according to claim 6,
Characterized in that, second determining module includes：First judging submodule, first determine son
Module；
First judging submodule is used to judge that all access times are in the first set
Whether the second set of zero PCI compositions is nonempty set；
First determination sub-module is used for the result that obtains in first judging submodule
When the second set is nonempty set, the Target cell is determined from the second set
PCI。
8. the acquisition system of a kind of Physical Cell Identifier PCI according to claim 7,
Characterized in that, second determining module also includes：Acquisition submodule, second judge submodule
Block, the second determination sub-module；
It is the second reference that the acquisition submodule is used to obtain Target cell in maximum adjacent area number
The second Neighboring Cell List during value；Second reference value is more than first reference value；
Second judging submodule is used to judge all in the first set to be not included in institute
In stating the second Neighboring Cell List, and the distance away from the Target cell is more than default multiplex distance
Whether the 3rd set of the PCI compositions that cell is used is nonempty set；
Second determination sub-module is used for the result that obtains in second judging submodule
When 3rd collection is combined into nonempty set, from the described 3rd set the Target cell is determined
PCI。
9. the acquisition system of a kind of Physical Cell Identifier PCI according to claim 8,
Characterized in that, second determining module also includes：3rd judging submodule, the 3rd determine
Submodule；
3rd judging submodule is used to judge all in the first set to be not included in institute
In stating the second Neighboring Cell List, and the distance away from the Target cell is less than or equal to the multiplex distance
The PCI that used of cell constitute the 4th collection and be combined into nonempty set；
3rd determination sub-module is used for the result that obtains in the 3rd judging submodule
When 4th collection is combined into nonempty set, from the described 4th set the Target cell is determined
PCI。
10. the acquisition system of a kind of Physical Cell Identifier PCI according to claim 9,
Characterized in that, second determining module also includes：4th determination sub-module；
4th determination sub-module is used for the result that obtains in the 3rd judging submodule
4th collection is when being combined into empty set, and selection belongs to second Neighboring Cell List and little away from the target
PCIs of the PCI that offset is used from farthest cell as the Target cell.
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