CN104602248B - A kind of method and network of assessment Physical Cell Identifier - Google Patents
A kind of method and network of assessment Physical Cell Identifier Download PDFInfo
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- CN104602248B CN104602248B CN201310534608.8A CN201310534608A CN104602248B CN 104602248 B CN104602248 B CN 104602248B CN 201310534608 A CN201310534608 A CN 201310534608A CN 104602248 B CN104602248 B CN 104602248B
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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
- H04W16/18—Network planning tools
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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
- H04W16/22—Traffic simulation tools or models
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The embodiment of the present invention provides a kind of method and network of assessment Physical Cell Identifier, is applied to LTE network, method includes：Construct station list and cell list；It according to the station list, cell list and has planned physical area mark PCI distributions, PCI has been assigned in each cell；The overlay area of rasterizing LTE network forms multiple grids, and accommodating cell is allowed in each grid；Obtain the PCI mould X matrixes of each grid；The PCI overall performances of the LTE network are assessed according to the PCI moulds X matrix.Using the method for rasterizing first by whole network rasterizing, and calculate the interference strength of single grid, and then calculate the PCI overall performances of LTE network, realize that quantitative evaluation PCI plans effect, PCI irrational distributions region so can be accurately instructed, the input of a large amount of human and material resources, resource and time etc. are avoided.
Description
Technical field
The present invention relates to communication network technologies, particularly relate to a kind of method and network of assessment Physical Cell Identifier.
Background technology
In LTE system, physical district ID (PCI, Physical Cell ID) has corresponded to orthogonal sequence and pseudo-random sequence
Combination, LTE system defines 504 PCI, to avoid inter-cell interference from needing to meet：Do not conflict, adjacent same of any two
Frequency cell does not use the same PCI；Do not obscure, there cannot be the use of any two co-frequency cell in all adjacent areas of a cell
Identical PCI.In addition, PCI and the public reference signal of cell are bound, PCI values directly determine the time-frequency location of reference signal,
If the value of two-port network PCI moulds 3 is equal, the time-frequency location of reference signal is identical, and one port network PCI moulds 6 take
If value is equal, the time-frequency location of reference signal is identical, the more use two-port network of macro base station.
Research of the prior art in relation to PCI focuses mostly in terms of the distribution of PCI and planning.After PCI distribution, by existing
Related evaluation is carried out using sweep generator and test terminal device when having LTE network to carry out the network optimization.For LTE overall networks into
Row PCI plans Performance Evaluation, needs to carry out seine test to covering entire area, finds be disturbed region first, recombine
The PCI distributions of planning are assessed in detail.The detailed assessment in some areas PCI is confined to certain several base station mostly, passes through frequency sweep
Instrument measurement obtains the network performance indexes such as neighboring community and the main RSRP and SINR for surveying cell, is intuitively surveyed by testing terminal device
Handling capacity is tried, if it find that RSRP performances are more excellent, SINR performances are poor need to be considered whether to be drawn by the interference of mould 3 of neighboring community
It rises.As shown in Figure 1, the PCI configurations of cell A, cell B are respectively 148 and 154, it can be found that in website A (PCI154) and website
Juncture area between B (PCI148), as shown in drive test curve in top in Fig. 1, RSRP is very good, but SINR it is very poor (<5) it, adjusts
All day line pitch angle and azimuth after problem still remain.The PCI148 of website B is changed to PCI147, drive test result is as schemed
In 1 shown in following drive test curve, SINR improves to 25 to 30, and reason is mainly PCI148Mod3=PCI154Mod3, causes to join
The position for examining signal is identical, causes caused by interfering between reference signal.The method is suitable for LTE local coverage areas, for LTE
Now the PCI assessments of net gamut are obviously not applicable.
There are the following problems for the prior art：Network PCI analysis and assessment can only be carried out again after LTE network is built up, need
A large amount of human and material resources, financial resources and the long period is needed, can not find PCI planning problems in advance；Whole LTE nets can not be assessed
The PCI of network plans effect, can only be directed to certain several specific station point of part and find unreasonable PCI distributions by rule of thumb；It cannot be by PCI
Planning effect carry out quantitative evaluation, whether the distribution of PCI has mould 3 to interfere the experience and drive test knot for fully relying on optimization personnel
Fruit.
Invention content
The technical problem to be solved in the present invention is to provide a kind of methods and network of assessment Physical Cell Identifier, can not assess
The PCI of whole LTE network plans effect, can only be directed to the defect that the several base stations in part find unreasonable PCI distributions by rule of thumb.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of method of assessment Physical Cell Identifier, application
In LTE network, method includes：Construct station list and cell list；According to the station list, cell list and object is planned
Cell designation PCI distributions are managed, PCI is assigned in each cell；The overlay area of rasterizing LTE network forms multiple grids,
Allow accommodating cell in each grid；Obtain the PCI mould X matrixes of each grid；It is commented according to the PCI moulds X matrix
Estimate the PCI overall performances of the LTE network.
In the method, constructs station list and cell list includes：The base station information table of LTE network is acquired, it is described
The azimuth of base station information table record base station IDs, cell ID, latitude and longitude of base station and cell；According to base station information table record
Station list and cell list described in data configuration.
In the method, it further includes prediction LTE network that the overlay area of rasterizing LTE network, which forms multiple grids before,
Overlapping coverage condition, specifically include：Import map resource；Import the parameter of LTE network；The parameter of wireless environment is set；If
Cell edge field strength is set, cell edge field strength is the field strength at the covering edge of prediction time cell；According to the map resource,
The overlapping of the parameter of LTE network, the parameter of wireless environment and cell edge field intensity prediction LTE network covers.
In the method, the PCI mould X matrixes for obtaining each grid specifically include：For a grid, select
The main serving cell of the grid；Interference threshold is set, candidate interfered cell is counted according to the interference threshold：Described in acquisition
The PCI moulds X of main serving cell as a result, and, obtain the mould X results of each candidate interfered cell；Count all in grid and main
The consistent candidate interfered cell of the PCI mould X results of serving cell is as formal interfered cell；According to main serving cell and interference
The 1*N matrixes of the received signal strength construction PCI moulds X of cell.
In the method, the 1*N squares of PCI moulds X are constructed according to the received signal strength of main serving cell and interfered cell
Battle array specifically includes：The first column element of the first row of 1*N matrixes is the received signal strength of main serving cell, remaining column element is dry
Disturb the received signal strength of cell.
In the method, the PCI overall performances that the LTE network is assessed according to the PCI moulds X matrix specifically include：
In each grid, the grid interference strength of interference of the interfered cell for main serving cell is calculated according to PCI mould X matrixes；
Each grid interference strength that adds up obtains the interference overall strength D in LTE network as the PCI overall performances for commenting
Estimate.
In the method, grid interference strength calculation formula is：Wherein, a11It is to be done
The main serving cell disturbed, j=2,3 ..., n, n-1 are that all mould X values and main serving cell mould X values are identical small in grid
Area's number, a1jFor -1 interfered cell of jth, T is interference threshold.
A kind of LTE network, including PCI capability evaluating devices, PCI overall performances include：Lists construction unit, for constructing
Station list and cell list；Physical area indicates allocation unit, for according to the station list, cell list and having planned
Physical area indicates PCI distributions, and PCI is corresponded in each cell；Rasterizing unit is used for the covering of rasterizing LTE network
Region forms multiple grids, and accommodating cell is allowed in each grid；Matrix unit, the PCI moulds for obtaining each grid
X matrix；Performance Evaluation unit, the PCI overall performances for assessing the LTE network according to PCI mould X matrixes.
In the LTE network, matrix unit includes：Main serving cell module, for for a grid, selecting described
The main serving cell of grid；Interference threshold module counts candidate interference for interference threshold to be arranged according to the interference threshold
Cell：Mould X object modules, PCI moulds X for obtaining main serving cell as a result, and, obtain each candidate interfered cell
PCI mould X results；Interfered cell module, it is dry for counting all candidates consistent with main serving cell PCI mould X results in grid
Cell is disturbed as formal interfered cell；Matrix generation module, for the reception signal according to main serving cell and interfered cell
The 1*N matrixes of strength build PCI moulds X.
In the LTE network, matrix unit includes：Grid interference strength computing module, for according to formulaCalculate the grid interference strength of the grid, wherein a11It is disturbed main serving cell, j=
2,3 ..., n, n-1 are all mould X values and the identical cell number of main serving cell mould X values, a in grid1jFor jth -1
Interfered cell, T are interference thresholds.
The above-mentioned technical proposal of the present invention has the beneficial effect that：Using the method for rasterizing first by whole network grid
Change, and calculate the interference strength of single grid, and then calculate the PCI overall performances of LTE network, realizes quantitative evaluation PCI
It plans effect, so can accurately instruct PCI irrational distributions region, avoid a large amount of human and material resources, resource and time etc.
Input.
Description of the drawings
Fig. 1 shows the schematic diagrames for carrying out performance evaluation after prior art distribution PCI to LTE network；
Fig. 2 indicate reference signal be distributed on frequency domain be mono- reference signal of every 3 RE schematic diagram；
Fig. 3 indicates the distribution map of the reference signal of the cell of PCIMod3=0；
Fig. 4 indicates the distribution map of the reference signal of the cell of PCIMod3=1；
Fig. 5 indicates the distribution map of the reference signal of the cell of PCIMod3=2；
Fig. 6 indicates a kind of flow diagram of the method for assessment Physical Cell Identifier PCI.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Using the effect of grid quantitative evaluation PCI planning in the present invention.
Physical area mark (PCI, Physical Cell ID) value range of LTE network is 0 to 503, totally 504
PCI values.Each LTE cells need tool, and there are one PCI values, and to be different from adjacent cell, terminal is when accessing LTE network, Neng Gougen
Each physical area is judged and accessed according to the value of PCI.
PCI needs the reason of multiplexing：The physical area of LTE network is very more, and Physical Cell Identifier PCI only has 504,
It is necessarily required to multiplexing PCI, it is therefore desirable to ensure to use physical area interval remote-i.e. multiplex distance enough of identical PCI sufficiently large,
It avoids terminal from generating in access to obscure and interfere.
The effect of public reference signal：Effect in the lte networks is measurement and the demodulated signal of channel, and LTE network is first
Public reference signal, ability demodulated data signal are first demodulated, and receives measuring signal intensity (RSRP), signal quality
(RSRQ) and a series of relevant parameters such as Signal to Interference plus Noise Ratio (SINR).Public reference signal is once interfered, and can lead to LTE network
Demodulation and measurement for signal generate deviation.
The position of public reference signal：For ease of understanding, by taking 2 antenna ports as an example, single antenna port, four antenna ports with
2 antenna ports are similar.According to the running time-frequency resource grid of LTE network, with conventional CP, 20MHz bandwidth, for 1ms subframes, altogether
It is RE to have 1200*14 RE, the basic unit that public reference signal occupies, and is distributed in entire 20MHz bandwidth, with 2*2MIMO
For, 2 antenna ports, as shown in Fig. 2, being distributed on frequency domain for reference signal is every 3 RE, mono- reference signal, wherein wrapping
It includes：R0 reference signals, R1 reference signals.As shown in Fig. 2, for the reference signal resource distribution map of Mod3=0 reference signal PCI,
The longitudinal axis is frequency, and horizontal axis is the time, is found by comparison diagram 2, Fig. 3, Fig. 4 and Fig. 5, the binding positions of PCI and reference signal, if
Want the reference signal-to-interference of this cell minimum, it would be desirable that the reference signal position of adjacent cell is different, and then requires this cell
PCI and adjacent cell PCIMod3 residual value it is unequal.
The relationship of public reference signal and PCI：Public reference signal sequence isnsIt is in a radio frames
Slot index, l are the OFDM symbol sequences in a time slot, will be mapped to complex value modulation symbol as followsUpper work
For time slot nsReference mark on middle antenna port pWherein：K=6m+ (v+vshift)mod6
Variable v and VshiftPosition of the different reference signals on frequency domain is defined, wherein
The proprietary frequency offset of cell In ID be cell (cell) ID.
In one time slot, the resource particle (k, l) of transmission of reference signals is used as on any antenna port, it cannot be in phase
Any transmission is carried out on other antenna ports in same time slot, and is arranged to 0.
The relationship of reference signal mapping position and PCI in conjunction with defined in the above agreement, Mod3=0 reference signal PCI
Reference signal resource be distributed as shown in figure 3, Mod3=1 reference signal PCI reference signal resource distribution as shown in figure 4, with reference to
The reference signal resource distribution of Mod3=2 signal PCI is as shown in Figure 5；In figure, the longitudinal axis is frequency, and horizontal axis is the time, passes through comparison
Several graph discoveries, the value of PCI and the position of reference signal are tightly bound, minimum to the reference signal-to-interference of this cell, then are wished
It hopes that it is different close to the reference signal position of cell, and then requires the PCI Mod3 values of this cell and the PCI of adjacent cell
Mod3 values are unequal.
The embodiment of the present invention provides a kind of method of assessment Physical Cell Identifier PCI, as shown in Fig. 2, being applied to LTE network
In,
Method is as shown in fig. 6, include：
Step 61, station list and cell list are constructed；
Step 62, according to the station list, cell list and planned physical area mark PCI distribution, PCI is distributed
Into each cell；
Step 63, the overlay area of rasterizing LTE network forms multiple grids, and accommodating cell is allowed in each grid；
Step 64, the PCI mould X matrixes of each grid are obtained；
Step 65, the PCI overall performances of the LTE network are assessed according to the PCI moulds X matrix.
Using the technology provided, using the method for rasterizing first by whole network rasterizing, and single grid is calculated
Interference strength, and then calculate the PCI overall performances of LTE network, realize the effect of quantitative evaluation PCI planning, can accurately really
PCI irrational distributions region is made, the input of a large amount of human and material resources, resource and time etc. are avoided.
X is typically X=3.
Base station information table include base station IDs, cell ID, latitude and longitude of base station and cell azimuth.In a preferred embodiment
In, it constructs station list and cell list includes：
Acquire the base station information table of LTE network, base station information table record base station IDs, cell ID, latitude and longitude of base station and
The azimuth of cell；
According to station list and cell list described in the data configuration of base station information table record.
In a preferred embodiment, further include prediction before the overlay area of rasterizing LTE network forms multiple grids
The overlapping coverage condition of LTE network, specifically includes：
Import map resource；
Import the parameter of LTE network；
The parameter of wireless environment is set；
Cell edge field strength is set, and cell edge field strength is the field strength at the covering edge of prediction time cell；
According to the map resource, the parameter of LTE network, the parameter of wireless environment and cell edge field intensity prediction LTE nets
The overlapping of network covers.
In a preferred embodiment, rasterizing LTE network overlay area process includes：According to assessment fine degree setting
Lattice dimensions size；Count each cell wireless performance parameter (RSRP, SINR etc.) in each grid.Cell edge field strength defines
For the covering cell-edge of the cell in prediction, cell edge field strength carries out related setting in combination with actual needs, can such as be arranged
RSRP is -100dBm/-110dBm etc., but not limited to this, cell-edge is smaller, and it is bigger to be overlapped area coverage.
LTE network overlapping coverage prediction result is subjected to rasterizing processing, rasterizing precision finally determines according to demand,
Such as 5 meters * 5 meters available, the grids such as 20 meters * 20 meters are handled, and the smaller then processing accuracy of grid division is more accurate, comparatively
Processing time is longer, then counts each cell wireless performance parameter in each grid again.
Assessment LTE network PCI overall performances process be：The mould X matrix corresponding to each grid is counted, then is calculated each
Interference strength of the mould X matrix for this grid main serving cell；Finally by all grids, mould X matrix is for the main clothes of this grid
The interference strength for cell of being engaged in is added, and acquires the PCI annoyance levels of whole network.X is specifically 3, and mould X matrix is specifically 3 matrix of mould.
In a preferred embodiment, the PCI mould X matrixes for obtaining each grid specifically include：
For a grid, the main serving cell of the grid is selected；
Interference threshold is set, candidate interfered cell is counted according to the interference threshold：
Obtain the PCI moulds X of the main serving cell as a result, and, obtain the mould X results of each candidate interfered cell；
All candidate interfered cells consistent with the PCI mould X results of main serving cell in grid are counted to do as formal
Disturb cell；
The 1*N matrixes of PCI moulds X are constructed according to the received signal strength of main serving cell and interfered cell.
In a preferred embodiment, construct PCI moulds X's according to the received signal strength of main serving cell and interfered cell
1*N matrixes specifically include：
The first column element of the first row of 1*N matrixes is the received signal strength of main serving cell, remaining column element is interference
The received signal strength of cell.
In an application scenarios, 3 result of PCI moulds of the main serving cell in grid is 0, the RSRP of main serving cell
It is -69, setting interference threshold is 30dB；
The candidate interfered cell that 3 PCI moulds 3 are 0 is shared in statistics grid, RSRP is respectively -99, -70, -92, then constitutes
3 matrix of mould be [- 69, -99, -70, -92], the first column element of the first row of 3 matrix of PCI moulds is main serving cell parameters.
In a preferred embodiment, the PCI overall performances that the LTE network is assessed according to the PCI moulds X matrix are specific
Including：
In each grid, the grid that interference of the interfered cell for main serving cell is calculated according to PCI mould X matrixes is dry
Disturb intensity；
Each grid interference strength that adds up obtains the interference overall strength D in LTE network as the PCI globalities
Can, the PCI overall performances are for assessing LTE network.
In a preferred embodiment, grid interference strength calculation formula is：
Wherein, a11Disturbed main serving cell, j=2,3 ..., n, n-1 be in grid all PCI moulds X values with
The identical cell number of main serving cell PCI mould X values, a1jFor -1 interfered cell of jth, T is interference threshold.Can also use or
Other wireless performance indexes substitute RSRP.
In an application scenarios, if 3 interference strength of PCI moulds of i-th of grid is Pi, 3 interference matrix Ai of mould is
(a1j)1×n, wherein a11For disturbed main serving cell, j=2,3 ..., n, n-1 are all cell PCI moulds in the grid
The cell number of 3 values and 3 value of main serving cell mould, a1jFor 3 interfered cell of -1 mould of jth.It is T that 3 interference threshold of PCI moulds, which is arranged,
Then 3 interference strength of PCI moulds
3 interference strength of PCI moulds of each grid is found out, then the interference overall strength of Whole PC I moulds 3 for counting LTE network (owns
3 interference strength of PCI moulds of grid) beW is the number of grid, the PCI moulds 3 of the smaller LTE network entirety of value of D
Conflict smaller, overall performance of network is better.
If 3 interference matrix A of interference threshold T=10dB, PCI mouldi=[- 64, -65, -66, -71, -73], then acquire PCI moulds 3
Interference strength Pi=17.507.It should be noted that when comparing two or more LTE network PCI interference, only in interference door
Just there is stronger comparativity, due to introducing T in assessing formula in interference strength, thus in T under conditions of limit T values are equal
The go down absolute value of Evaluation result of different situations does not have stronger comparison.
In a preferred embodiment, interference overall strength D is carried out segmentation on figure layer is shown to show, identifies that PCI is dry
Disturb serious region.Including：Several segment values are set, different segment values is indicated with different colors in different segmentations.
In an application scenarios, using the technology that each embodiment is provided, including：
Step 1, the base station information table of LTE network is acquired, base station information table includes：Base station IDs, cell ID, latitude and longitude of base station
With the azimuth of cell.
Step 2, station list and cell list are constructed, all base stations of LTE network are established according to the base station information table
List and the list of all cells.
Step 3, cell is constructed, is distributed according to the cell list and the PCI planned, PCI is corresponded into each cell
In.
Step 4, prediction LTE overlappings covering imports existing network parameters, wireless ring is arranged as shown in Fig. 2, importing map resource
Cell edge field strength is arranged in border, is arranged according to correlation and carries out LTE network overlapping coverage prediction.
Step 5, the overlay area of rasterizing LTE network.LTE overlapping coverage prediction results are subjected to rasterizing processing, grid
Precision format according to demand finally to determine, such as 5 meters * 5 meters available, 20 meters of * 20 meters of grids are handled, grid division it is smaller
Then processing accuracy is more accurate, and comparatively processing time is longer, then counts each cell wireless performance ginseng in each grid again
Number.
Step 6,3 matrix of construction PCI moulds.
In the overlay areas LTE of rasterizing, the wireless indexes such as field strength (RSRP), Signal to Interference plus Noise Ratio (SINR) can be used and determine respectively
Main serving cell in a grid can such as choose RSRP signals are best in the same grid cell as main serving cell；If
The interference threshold of PCI moulds 3 is set, counts the cell within the scope of interference threshold as interfered cell；By the main service of each grid
The PCI of cell carries out mould 3 and handles, and finally obtains some value in 0/,1/2 3 numerical value.
The PCI of each interfered cell is carried out PCI moulds 3 to handle, selects the interference consistent with 3 result of main serving cell mould small
The RSRP numerical value of element of the area as 3 matrix of PCI moulds, main serving cell is taken as the first column element of matrix the first row, constitutes 1*N squares
Battle array.
3 interference strength of PCI moulds of each grid is found out, then the interference overall strength of Whole PC I moulds 3 for counting LTE network (owns
3 interference strength of PCI moulds of grid)The PCI moulds 3 of the smaller LTE overall networks of value of D conflict smaller, and network is whole
Performance is better.
Without loss of generality, if 3 interference matrix of T=10dB, PCI mould is Ai=[- 64, -65, -66, -71, -73], then acquire
3 interference strength P of PCI mouldsi=17.507.It should be noted that when comparing two or more LTE network PCI interference, only exist
Under conditions of interference threshold T values are equal just have stronger comparativity, due to interference strength assess formula in introduce T because
Son, thus do not have stronger comparison in the go down absolute value of Evaluation result of the different situations of T.
Step 8, after the PCI annoyance levels for acquiring whole network, PCI annoyance levels can be segmented on figure layer is shown
It has been shown that, is come out the region recognition of PCI serious interferences by the way that result is intuitively presented, and emphasis carries out PCI optimizations.
The embodiment of the present invention provides a kind of LTE network, including PCI capability evaluating devices, the PCI overall performances include：
Lists construction unit, for constructing station list and cell list；
Physical area indicate allocation unit, for according to the station list, cell list and planned physical area mark
Show that PCI is distributed, PCI is corresponded in each cell；
Rasterizing unit is used for the overlay area of rasterizing LTE network, forms multiple grids, allow in each grid
Accommodating cell；
Matrix unit, the PCI mould X matrixes for obtaining each grid；
Performance Evaluation unit, the PCI overall performances for assessing the LTE network according to PCI mould X matrixes.
In a preferred embodiment, matrix unit includes：
Main serving cell module, for for a grid, selecting the main serving cell of the grid；
Interference threshold module counts candidate interfered cell for interference threshold to be arranged according to the interference threshold：
Mould X object modules, PCI moulds X for obtaining main serving cell as a result, and, obtain each candidate interfered cell
PCI mould X results；
Interfered cell module is small for counting all candidate interference consistent with main serving cell PCI mould X results in grid
Area is as formal interfered cell；
Matrix generation module, the 1* for constructing PCI moulds X according to the received signal strength of main serving cell and interfered cell
N matrix.
In a preferred embodiment, matrix unit includes：
Grid interference strength computing module, for according to formulaCalculate the grid of the grid
Lattice interference strength, wherein a11Disturbed main serving cell, j=2,3 ..., n, n-1 be in grid all mould X values with
The identical cell number of main serving cell mould X values, a1jFor -1 interfered cell of jth, T is interference threshold.
Each grid interference strength that adds up obtains the interference overall strength D in LTE network as the PCI overall performances.
After the PCI annoyance levels for acquiring whole network, on figure layer is shown can PCI annoyance levels be carried out segmentation shows,
The region recognition of PCI serious interferences is come out by the way that result is intuitively presented, emphasis carries out PCI optimizations
It is using the advantage after this programme：Using the method for rasterizing first by whole network rasterizing, and calculate list
The interference strength of a grid, and then the PCI overall performances of LTE network are calculated, realize that quantitative evaluation PCI plans effect, so
It can accurately determine PCI irrational distributions region, avoid a large amount of human and material resources of input, resource and time etc..
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of method of assessment Physical Cell Identifier, is applied to LTE network, which is characterized in that method includes：
Construct station list and cell list；
It according to the station list, cell list and has planned physical area mark PCI distributions, PCI is assigned to each cell
In；
The overlay area of rasterizing LTE network forms multiple grids, and accommodating cell is allowed in each grid；
The PCI mould X matrixes of each grid are obtained, including：For a grid, the main service for selecting the grid is small
Area；Interference threshold is set, candidate interfered cell is counted according to the interference threshold：Obtain the PCI moulds X of the main serving cell
As a result, and, obtain the mould X results of each candidate interfered cell；All PCI moulds X with main serving cell in grid are counted to tie
The consistent candidate interfered cell of fruit is as formal interfered cell；According to the received signal strength of main serving cell and interfered cell
Construct the 1*N matrixes of PCI moulds X；
The PCI overall performances of the LTE network are assessed according to the PCI moulds X matrix, including：In each grid, according to PCI
Mould X matrix calculates the grid interference strength of interference of the interfered cell for main serving cell；Cumulative each grid interference
Intensity obtains the interference overall strength D in LTE network as the PCI overall performances for assessing, wherein grid interference strength meter
Calculating formula is：Wherein, a11It is disturbed main serving cell, j=2,3 ..., n, n-1 are
All mould X values and the identical cell number of main serving cell mould X values, a in grid1jFor -1 interfered cell of jth, T is interference door
Limit.
2. according to the method described in claim 1, it is characterized in that, construction station list and cell list include：
Acquire the base station information table of LTE network, the base station information table record base station IDs, cell ID, latitude and longitude of base station and cell
Azimuth；
According to station list and cell list described in the data configuration of base station information table record.
3. according to the method described in claim 1, it is characterized in that, the overlay area of rasterizing LTE network forms multiple grids
Further include before the overlapping coverage condition for predicting LTE network, specifically includes：
Import map resource；
Import the parameter of LTE network；
The parameter of wireless environment is set；
Cell edge field strength is set, and cell edge field strength is the field strength at the covering edge of prediction time cell；
According to the map resource, the parameter of LTE network, the parameter of wireless environment and cell edge field intensity prediction LTE network
Overlapping covering.
4. according to the method described in claim 1, it is characterized in that, strong according to the reception signal of main serving cell and interfered cell
The 1*N matrixes of degree construction PCI moulds X specifically include：
The first column element of the first row of 1*N matrixes is the received signal strength of main serving cell, remaining column element is interfered cell
Received signal strength.
5. a kind of LTE network, which is characterized in that including PCI capability evaluating devices, the PCI capability evaluating devices include list
Structural unit, physical area mark allocation unit, rasterizing unit, matrix unit and Performance Evaluation unit, wherein：
Lists construction unit, for constructing station list and cell list；
Physical area indicate allocation unit, for according to the station list, cell list and planned physical area indicate PCI
Distribution, PCI is corresponded in each cell；
Rasterizing unit is used for the overlay area of rasterizing LTE network, forms multiple grids, allow to house in each grid
Cell；
Matrix unit, the PCI mould X matrixes for obtaining each grid；Matrix unit includes：
Main serving cell module, for for a grid, selecting the main serving cell of the grid；
Interference threshold module counts candidate interfered cell for interference threshold to be arranged according to the interference threshold：
Mould X object modules, PCI moulds X for obtaining main serving cell as a result, and, obtain the PCI of each candidate interfered cell
Mould X results；
Interfered cell module is made for counting all candidate interfered cells consistent with main serving cell PCI mould X results in grid
For formal interfered cell；
Matrix generation module, the 1*N squares for constructing PCI moulds X according to the received signal strength of main serving cell and interfered cell
Battle array；And
Grid interference strength computing module, for according to formulaCalculate the grid interference of the grid
Intensity, wherein a11It is disturbed main serving cell, j=2,3 ..., n, n-1 are all mould X values and main service in grid
The identical cell number of cell mould X values, a1jFor -1 interfered cell of jth, T is interference threshold；
Performance Evaluation unit, the PCI overall performances for assessing the LTE network according to PCI mould X matrixes, including：In each grid
In lattice, the grid interference strength of interference of the interfered cell for main serving cell is calculated according to PCI mould X matrixes；It is cumulative each
The grid interference strength obtains the interference overall strength D in LTE network as the PCI overall performances for assessing.
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| CN105516992B (en) * | 2015-12-14 | 2018-12-14 | 中通服建设有限公司 | A kind of PCI planing method of LTE network |
| CN106937402B (en) * | 2015-12-31 | 2020-08-04 | 亿阳信通股份有限公司 | Cell detection method and device |
| CN108810880B (en) * | 2017-05-05 | 2020-07-10 | 中国移动通信集团公司 | Planning method and device for physical cell identifier |
| CN109936851B (en) * | 2017-12-15 | 2021-11-30 | 中国移动通信集团浙江有限公司 | LTE network index processing method and device |
| CN110049501B (en) * | 2018-01-15 | 2022-04-15 | 中兴通讯股份有限公司 | Data acquisition method, data acquisition device and computer-readable storage medium |
| CN110167037B (en) * | 2019-05-24 | 2022-05-31 | 中国联合网络通信集团有限公司 | LTE network interference evaluation method, device, system and storage medium |
| CN112020072B (en) * | 2019-05-31 | 2023-04-07 | 中国移动通信集团河南有限公司 | Base station site selection method and device |
| CN112543469B (en) * | 2020-09-02 | 2023-04-07 | 中国移动通信集团河北有限公司 | Network problem processing method, device, equipment and computer readable storage medium |
| CN117749294A (en) * | 2022-09-13 | 2024-03-22 | 中兴通讯股份有限公司 | Interference detection method, base station and storage medium |
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