CN101692734A - Method and device for predicting cell interference - Google Patents
Method and device for predicting cell interference Download PDFInfo
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- CN101692734A CN101692734A CN200910178575A CN200910178575A CN101692734A CN 101692734 A CN101692734 A CN 101692734A CN 200910178575 A CN200910178575 A CN 200910178575A CN 200910178575 A CN200910178575 A CN 200910178575A CN 101692734 A CN101692734 A CN 101692734A
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Abstract
The invention discloses a method and a device for predicting cell interference. The method comprises the following steps: dividing a coverage area of a cell to be predicted into grids, and determining latitude and longitude information corresponding to each grid; acquiring latitude and longitude information of a base station in the cell to be predicted, and acquiring latitude and longitude information and signal transmission power of a base station in a cell adjacent to the cell to be predicted; calculating a distance from each grid to each base station according to the latitude and longitude information of each grid and the acquired latitude and longitude information of the base stations; and determining interference values of the cell adjacent to the cell to be predicted for each grid according to a propagation model, the distance from each grid to each base station and the signal transmission power of the base station. The method and the device can realize the prediction for the cell interference.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of interference prediction method and device of sub-district.
Background technology
In the moving communicating field, can exist between the neighbor cell and disturb, therefore, need control, coordinate the suffered interference in sub-district, so that the terminal use in the sub-district obtains better user experience.And to the suffered interference in sub-district control, the prerequisite of operation such as coordination is: obtain the suffered disturbed condition in each sub-district.
At present, prior art only can realize the measurement to the area interference situation, concrete, at first gather the MR data of each terminal to report among a certain sub-district X, afterwards to the received signal code power (RSCP in the MR data, Received Signal Code Power), the ratio parameters such as (EC/N0) of every chip energy and Carrier To Noise Power Density adds up, thereby obtain the disturbed condition of sub-district X.
But above-mentioned measurement to the area interference situation is based on that the actual data that report of terminal obtain, and when not having the terminal to report data, prior art can't realize the prediction to the area interference situation.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is, a kind of interference prediction method and device of sub-district is provided, and can predict the area interference situation.
For this reason, the embodiment of the invention adopts following technical scheme:
The embodiment of the invention provides a kind of interference prediction method of sub-district, comprising:
The coverage of sub-district to be predicted is divided into grid, and determines the latitude and longitude information of each grid correspondence; Obtain the latitude and longitude information of base station in the sub-district to be predicted, and obtain the latitude and longitude information and the signal transmission power of base station in the neighbor cell of described sub-district to be predicted;
According to the latitude and longitude information of the latitude and longitude information of described each grid and the described base station that gets access to, calculate the distance of each grid with respect to each base station;
With respect to signal of base station transmitting power in the distance of each base station and the described neighbor cell, determine the interference value of the neighbor cell of described sub-district to be predicted according to propagation model, described each grid to described each grid.
Wherein, also comprise:
Determine in the neighbor cell of sub-district to be predicted with described sub-district to be predicted same frequency and with the sub-district of scrambler;
According to sub-district described and to be predicted same frequency and with the neighbor cell of scrambler interference value, calculate total interference value of each grid to each grid.
Between the interference value and the total interference value of described calculating of described definite neighbor cell to described each grid, also comprise:
The described neighbor cell determined is carried out normalized to the interference value of each grid, and the interference value after the normalized is carried out filtration treatment.
The neighbor cell of described definite described sub-district to be predicted is specially the interference value of described each grid:
Obtain the path loss of each grid according to propagation model and each grid with respect to the distance calculation of each base station with respect to each base station;
According to the described path loss that calculates and each signal of base station transmitting power, each grid of corresponding calculating is with respect to the incoming level of each sub-district; Wherein, described each sub-district comprises: the neighbor cell of sub-district to be predicted and sub-district to be predicted;
According to the incoming level of described each grid with respect to each sub-district, the neighbor cell that calculates sub-district to be predicted is respectively to the interference value of each grid.
Each grid of described calculating is specially with respect to the incoming level of each sub-district:
Calculate each signal of base station transmitting power and each grid with respect to the difference between the path loss of each base station.
The neighbor cell of described calculating sub-district to be predicted is specially the interference value of each grid respectively:
Calculate each grid with respect to the incoming level of sub-district to be predicted and each grid with respect to the difference between the incoming level of each neighbor cell.
Described coverage with sub-district to be predicted is divided into grid and is specially:
Set up the simulation coverage diagram of sub-district to be predicted according to transmitting power, antenna directional angle, angle of declination, frequency and the propagation model of sub-district to be predicted;
By the border of described simulation coverage diagram definite sub-district to be predicted on GIS-Geographic Information System GIS map, the grid of determining not to be positioned on the GIS map outside the described border is the grid of sub-district to be predicted; Wherein, described grid is the regular length that marks off and the rectangle of width on the GIS map.
The embodiment of the invention also provides a kind of interference prediction device of sub-district, it is characterized in that, comprising:
Division unit is used for the coverage of sub-district to be predicted is divided into grid, and determines the latitude and longitude information of each grid correspondence;
Acquiring unit is used for obtaining the latitude and longitude information of base station, sub-district to be predicted, and obtains the latitude and longitude information and the signal transmission power of base station in the neighbor cell of described sub-district to be predicted;
Computing unit is used for the latitude and longitude information according to the latitude and longitude information of described each grid and the described base station that gets access to, calculates the distance of each grid with respect to each base station;
The interference value determining unit is used for determining the interference value of the neighbor cell of described sub-district to be predicted to described each grid according to propagation model, described each grid distance and the described neighbor cell signal of base station transmitting power with respect to each base station.
Wherein, also comprise:
Total interference value determining unit, the neighbor cell that is used for determining sub-district to be predicted and described sub-district to be predicted same frequency and with the sub-district of scrambler; According to sub-district described and to be predicted same frequency and with the neighbor cell of the scrambler interference value after to the filtration treatment of each grid, calculate total interference value of each grid.
Also comprise:
The normalization unit is used for the described neighbor cell determined is carried out normalized to the interference value of each grid;
Filter element is used for the interference value after the normalized is carried out filtration treatment, and the interference value after the filtration treatment is sent to total interference value determining unit.
Described interference value determining unit comprises:
Path loss is determined subelement, is used for obtaining the path loss of each grid with respect to each base station according to propagation model and each grid with respect to the distance calculation of each base station;
Incoming level is determined subelement, is used for according to the described path loss and each signal of base station transmitting power that calculate, and each grid of corresponding calculating is with respect to the incoming level of each sub-district; Wherein, described each sub-district comprises: the neighbor cell of sub-district to be predicted and sub-district to be predicted;
Interference value is determined subelement, is used for according to the incoming level of described each grid with respect to each sub-district, and the neighbor cell that calculates sub-district to be predicted is respectively to the interference value of each grid.
Division unit comprises:
Coverage diagram is set up subelement, is used for the simulation coverage diagram that transmitting power, antenna directional angle, angle of declination, frequency and propagation model according to sub-district to be predicted set up sub-district to be predicted;
Grid is determined subelement, is used for determining on GIS-Geographic Information System GIS map by described simulation coverage diagram the border of sub-district to be predicted, and the grid of determining not to be positioned on the GIS map outside the described border is the grid of sub-district to be predicted; Wherein, described grid is the regular length that marks off and the rectangle of width on the GIS map;
Information is determined subelement, is used for determining the latitude and longitude information of each grid correspondence.
Technique effect for technique scheme is analyzed as follows:
The coverage of sub-district to be predicted is divided into grid, according to propagation model, each grid distance and signal of base station transmitting power with respect to each base station, determine the interference value of the neighbor cell of sub-district to be predicted, thereby realized prediction area interference to each grid of sub-district to be predicted
Description of drawings
Fig. 1 is a kind of area interference Forecasting Methodology of embodiment of the invention schematic flow sheet;
Fig. 2 is the another kind of area interference Forecasting Methodology of an embodiment of the invention schematic flow sheet;
Fig. 3 is a kind of area interference prediction unit of embodiment of the invention structural representation;
Fig. 4 is an embodiment of the invention interference value determining unit implementation structure schematic diagram;
Fig. 5 is an embodiment of the invention division unit implementation structure schematic diagram.
Embodiment
Below, be described with reference to the accompanying drawings the interference prediction method of embodiment of the invention sub-district and the realization of device.
Fig. 1 is the interference prediction method flow schematic diagram of a kind of sub-district of the embodiment of the invention, as shown in Figure 1, comprising:
Step 101: the coverage of sub-district to be predicted is divided into grid, and determines the latitude and longitude information of each grid correspondence; Obtain the latitude and longitude information of base station in the sub-district to be predicted, and obtain the latitude and longitude information and the signal transmission power of base station in the neighbor cell of described sub-district to be predicted.
Step 102:, calculate the distance of each grid with respect to each base station according to the latitude and longitude information of the latitude and longitude information of described each grid and the base station that gets access to.
The base station comprises described in this step: the base station in the base station in the sub-district to be predicted and the neighbor cell of sub-district to be predicted.
Step 103:, determine the interference value of the neighbor cell of described sub-district to be predicted to described each grid according to propagation model, described each grid distance and described signal of base station transmitting power with respect to each described base station.
In the area interference Forecasting Methodology shown in Figure 1, the coverage of sub-district to be predicted is divided into grid, according to propagation model, each grid distance and signal of base station transmitting power with respect to each base station, determine the interference value of the neighbor cell of sub-district to be predicted, thereby realized prediction area interference to each grid of sub-district to be predicted; And described prediction is finished based on each grid of sub-district to be predicted, thus make described predict the outcome more accurate.
Below, the interference prediction method flow schematic diagram by sub-district shown in Figure 2 is described in detail the area interference Forecasting Methodology, as shown in Figure 2, comprising:
Step 201: extract the cell information of the neighbor cell of sub-district to be predicted, and obtain the cell information of sub-district to be predicted;
Wherein, the cell information of described neighbor cell mainly comprises: the latitude and longitude information of base station in signal of base station transmitting power and each neighbor cell in the ID of neighbor cell, each neighbor cell; Can also comprise: antenna directional angle, angle of declination, frequency etc.
The cell information of described sub-district to be predicted comprises: the latitude and longitude information of base station in signal of base station transmitting power and the sub-district to be predicted in the sub-district ID of sub-district to be predicted, the sub-district to be predicted; Can also comprise: antenna directional angle, angle of declination, frequency etc.
Wherein, the latitude and longitude information of described base station is: the pairing longitude and latitude in base station to (x, y).
Step 202: the coverage of sub-district to be predicted is divided into grid, and determines the latitude and longitude information of each grid correspondence.
Concrete, in the realization of this step:
GIS-Geographic Information System (GIS) map can be divided into the rectangle of regular length and width, described rectangle is called grid, is used for accurately locating the zone on the GIS map, and, the corresponding longitude and latitude of each grid to (x, y).For example, can set described length and width and equate, be 100 meters, and then the specification of described grid is 100m * 100m.According to transmitting power, antenna directional angle, angle of declination, frequency and the propagation model etc. of sub-district, calculate the coverage of sub-district, the corresponding simulation coverage diagram of setting up sub-district to be predicted;
Simulation coverage diagram by described sub-district to be predicted is determined the border of sub-district to be predicted on the GIS map, determine not to be positioned on the GIS map grid outside the described border.The described grid that is not positioned at outside the described border is the grid of sub-district to be predicted.
Can determine the latitude and longitude information of each grid correspondence that sub-district to be predicted covers by described GIS map.
Step 203: the latitude and longitude information of the latitude and longitude information of each grid that covers according to sub-district to be predicted and the base station that gets access to, calculate the distance of each grid with respect to each base station.
The base station comprises described in this step: the base station in the base station in the sub-district to be predicted and the neighbor cell of sub-district to be predicted.
Suppose: sub-district to be predicted is a cell x, and it has a, b...N N neighbor cell altogether, and cell x to be predicted covers grid 1,2,3...M M grid altogether, then can calculate MN distance value D in this step, and is concrete, as shown in table 1 below:
Table 1
| Cell x | Adjacent area a | Adjacent area b | ...... | Adjacent area N | |
| Grid 1 | ??D x1 | ??D a1 | ??D b1 | ??D N1 |
| Cell x | Adjacent area a | Adjacent area b | ...... | Adjacent area N | |
| Grid 2 | ??D x2 | ??D a2 | ??D b2 | ??D N2 | |
| ...... | |||||
| Grid M | ??D xM | ??D aM | ??D bM | ??D NM |
Step 204: obtain the path loss of each grid with respect to the distance calculation of each base station with respect to each base station according to propagation model and each grid.
Wherein, described propagation model can pass through formula (1) expression:
L＝(44.9-6.55log(h
b))log(D)+46.3+33.9log(f)-13.82log(h
b)+C
m(1)
Wherein, L is greatest path loss (db); F is carrier frequency (MHz); h
bBe antenna height (m); D is the distance (km) that grid is arrived in the base station; Cm is atural object loss modifying factor, and is concrete, when the sub-district is in spacious region, Cm can value be-6, and when the sub-district is in the sparse degree of medium-scale city or center, suburbs trees when medium, m can value be 0, when the sub-district was in the urban centre, big city, Cm can value be 3.
Correspondence table 1, after this step was carried out, each grid that calculates was as shown in table 2 with respect to the path loss of each base station:
Table 2
| Cell x | Adjacent area a | Adjacent area b | ...... | Adjacent area N | |
| Grid 1 | ??L x1 | ??L a1 | ??L b1 | ??L N1 | |
| Grid 2 | ??L x2 | ??L a2 | ??L b2 | ??L N2 | |
| ??...... | |||||
| Grid M | ??L xM | ??L aM | ??L bM | ??L NM |
Step 205: according to the described path loss that calculates and each signal of base station transmitting power, each grid of corresponding calculating is with respect to the incoming level of each sub-district.
The sub-district comprises described in this step: the neighbor cell of sub-district to be predicted and sub-district to be predicted.
Wherein, suppose that the signal of base station transmitting power is T in each sub-district, each grid is R with respect to the incoming level of base station, then described incoming level R can calculate by formula R=T-L, also, obtain the incoming level of each grid with respect to each sub-district promptly by calculating each signal of base station transmitting power and each grid with respect to the difference between the path loss of each base station.
For table 2, can obtain the incoming level of each grid shown in the following table 3 after carrying out this step with respect to each sub-district:
Table 3
| Cell x | Adjacent area a | Adjacent area b | ...... | Adjacent area N | |
| Grid 1 | ?R x1＝T x-L x1 | ?R a1＝T a-L a1 | ??R b1＝T b-L b1 | ?R N1＝T N-L N1 | |
| Grid 2 | ?R x2＝T x-L x2 | ?R a2＝T a-L a2 | ??R b2＝T b-L b2 | ?R N2＝T N-L N2 | |
| ...... | |||||
| Grid M | ?R xM＝T x-L xM | ?R aM＝T a-L aM | ??R bM＝T b-L bM | ?R NM＝T N-L NM |
Step 206: according to the incoming level of described each grid with respect to each sub-district, the neighbor cell that calculates sub-district to be predicted is respectively to the interference value of each grid.
Concrete, the realization of this step can for: calculate each grid with respect to the incoming level of sub-district to be predicted and each grid with respect to the difference between the incoming level of each described neighbor cell.
Concrete, for the incoming level of each grid shown in the table 3, obtain interference value tabulation as shown in table 4 with respect to each sub-district:
Table 4
| Adjacent area a | Adjacent area b | ...... | Adjacent area N | |
| Grid 1 | ??I xa1＝R x1-R a1 | ??I xb1＝R x1-R b1 | ??I xN1＝R x1-R N1 | |
| Grid 2 | ??I xa2＝R x2-R a2 | ??I xb2＝R x2-R b2 | ??I xN2＝R x2-R N2 | |
| ...... | ||||
| Grid M | ??I xaM＝R xM-R aM | ??I xbM＝R xM-R bM | ??I xNM＝R xM-R NM |
Step 207: the described neighbor cell that calculates is carried out normalized to the interference value of each grid of sub-district to be predicted, obtain the interference value after the normalized.
Concrete, can carry out described normalized by formula A=P/ (I+Q); Wherein, P＜Q.
Because the value of I is generally less than 110 in actual applications, thus can value P=100, Q=200, thus make the value of A between 0 to 0.5.
Use formula A=100/ (I+200) to carry out obtaining after the normalized table 5 for table 4:
Table 5
| Adjacent area a | Adjacent area b | ... | Adjacent area N | |
| Grid 1 | ??A xa1＝100/(I xa1+200) | ??A xb1＝100/(I xb1+200) | ??A xN1＝100/(I xN1+200) |
| Adjacent area a | Adjacent area b | ... | Adjacent area N | |
| Grid 2 | ??A xa2＝100/(I xa2+200) | ??A xb2＝100/(I xb2+200) | ??A xN2＝100/(I xN2+200) | |
| ...... | ||||
| Grid M | ??A xaM＝100/(I xaM+200) | ??A xbM＝100/(I xbM+200) | ??A xNM＝100/(I xNM+200) |
Step 208: the interference value after the described normalized is filtered the interference value after the normalized after obtaining filtering.
Wherein, this step can be provided with an interference threshold when realizing, keeps in the interference value after the normalized value greater than this interference threshold, makes zero less than the value of this interference threshold.
Interference value is little of to a certain degree just no longer including effects of jamming, do not carry out described filtration in this step, can make the numerical value such as total interference value that calculate in the subsequent step higher, so will directly make zero less than the interference value of described interference threshold in this step, like this, can make the result of calculation of total interference value of each grid in the subsequent step 209 more accurate.
Described normalized in step 207 and the step 208 and filtration step are optional step.
Step 209: search in the neighbor cell that obtains sub-district to be predicted sub-district with sub-district to be predicted same frequency, identical scrambler, according to sub-district described and to be predicted same frequency and with the neighbor cell of the scrambler interference value after to the filtration treatment of each grid, calculate total interference value of each grid.
For example, suppose and sub-district to be predicted same frequency total K with the neighbor cell of scrambler, then the computing formula of total interference value of grid 1 can for:
After step 209 is complete, then obtain total interference value of each grid, this total interference value is the suffered interference value of each grid in theory.In actual applications, can also be further different threshold values be set for total interference value of grid, thereby total interference value that grid is subjected to is carried out the division of grade, and on the GIS map, carry out the differentiation of the suffered interference value grade of grid by different colors, form the cell simulations interference value of sub-district to be predicted, thereby make the user can determine the degree of the suffered interference of each grid in the sub-district to be predicted intuitively.
Further, the cell simulations interference figure to described sub-district can also have following application:
Form the contrast differential chart: two cell simulations interference figures (interference threshold T) are done difference (be the interference value of corresponding grid is done poor), form differential chart.
Form the user distribution interference figure: be multiplied by " number of users of this grid " on the interference value of each grid, for example, total interference value of grid 1 is A
1, number of users is S
1, total interference value of grid 2 is A
2, number of users is S
2, by that analogy, then: grid 1 based on user's interference value is: A
C1=A
1* S
1Grid 2 based on user's interference value is: A
C2=A
2* S
2 Grid M based on user's interference value is: A
CM=A
M* S
M
Fig. 3 is the interference prediction device of a kind of sub-district of the embodiment of the invention, as shown in Figure 3, comprising:
Acquiring unit 320 is used for obtaining the latitude and longitude information of base station, sub-district to be predicted, and obtains the latitude and longitude information and the signal transmission power of base station in the neighbor cell of described sub-district to be predicted;
Interference value determining unit 340 is used for determining the interference value of the neighbor cell of described sub-district to be predicted to described each grid according to propagation model, described each grid distance and the described signal of base station transmitting power with respect to each base station.
Preferably, as shown in Figure 3, this device can also comprise:
Total interference value determining unit 370 is used for determining the neighbor cell and the sub-district of described sub-district to be predicted same frequency with scrambler of sub-district to be predicted; With the neighbor cell of the scrambler interference value after to the filtration treatment of each grid, calculate total interference value of each grid according to sub-district described and to be predicted same frequency.
In addition, as shown in Figure 4, described interference value determining unit 340 can realize by following structure:
Path loss is determined subelement 410, is used for obtaining the path loss of each grid with respect to each base station according to propagation model and each grid with respect to the distance calculation of each base station;
Incoming level is determined subelement 420, is used for according to the described path loss and each signal of base station transmitting power that calculate, and each grid of corresponding calculating is with respect to the incoming level of each sub-district; Wherein, described each sub-district comprises: the neighbor cell of sub-district to be predicted and sub-district to be predicted;
Interference value is determined subelement 430, is used for according to the incoming level of described each grid with respect to each sub-district, and the neighbor cell that calculates sub-district to be predicted is respectively to the interference value of each grid.
As shown in Figure 5, described division unit 310 can realize by following structure:
Coverage diagram is set up subelement 510, is used for the simulation coverage diagram that transmitting power, antenna directional angle, angle of declination, frequency and propagation model according to sub-district to be predicted set up sub-district to be predicted;
Grid is determined subelement 520, is used for determining on GIS-Geographic Information System GIS map by described simulation coverage diagram the border of sub-district to be predicted, determines not to be positioned on the GIS map grid outside the described border; Wherein, described grid is the regular length that marks off and the rectangle of width on the GIS map;
Information is determined subelement 530, is used for determining the latitude and longitude information of each grid correspondence.
In the area interference prediction unit of Fig. 3～shown in Figure 5, division unit 310 is divided into grid with the coverage of sub-district to be predicted, interference value determining unit 340 is according to propagation model, each grid distance and the signal of base station transmitting power with respect to each base station, determine the interference value of the neighbor cell of sub-district to be predicted, thereby realized prediction area interference to each grid of sub-district to be predicted; And described prediction is finished based on each grid of sub-district to be predicted, thus make described predict the outcome more accurate.
Area interference Forecasting Methodology of the present invention and device go for Wideband Code Division Multiple Access (WCDMA) (WCDMA), synchronous code division multiple access networks such as (TD-SCDMA) of time-division, and can expand to global system for mobile communications networks such as (GSM).But, GSM has only frequency not have scrambler, and, each subdistrict frequency point has a plurality of, therefore, when the total interference value of each grid of calculating, no longer whether frequently judge together, but select to carry out the calculating of total interference value with the interference value of sub-district to be predicted frequency together, adjacent neighbor cell frequently with scrambler by the minizone.
One of ordinary skill in the art will appreciate that, the process of the Forecasting Methodology of realization the foregoing description area interference can be finished by the relevant hardware of program command, described program can be stored in the read/write memory medium, and this program is carried out the corresponding step in the said method when carrying out.Described storage medium can be as ROM/RAM, magnetic disc, CD etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. the interference prediction method of a sub-district is characterized in that, comprising:
The coverage of sub-district to be predicted is divided into grid, and determines the latitude and longitude information of each grid correspondence; Obtain the latitude and longitude information of base station in the sub-district to be predicted, and obtain the latitude and longitude information and the signal transmission power of base station in the neighbor cell of described sub-district to be predicted;
According to the latitude and longitude information of the latitude and longitude information of described each grid and the described base station that gets access to, calculate the distance of each grid with respect to each base station;
With respect to signal of base station transmitting power in the distance of each base station and the described neighbor cell, determine the interference value of the neighbor cell of described sub-district to be predicted according to propagation model, described each grid to described each grid.
2. method according to claim 1 is characterized in that, also comprises:
Determine in the neighbor cell of sub-district to be predicted with described sub-district to be predicted same frequency and with the sub-district of scrambler;
According to sub-district described and to be predicted same frequency and with the neighbor cell of scrambler interference value, calculate total interference value of each grid to each grid.
3. method according to claim 2 is characterized in that, between the interference value and the total interference value of described calculating of described definite neighbor cell to described each grid, also comprises:
The described neighbor cell determined is carried out normalized to the interference value of each grid, and the interference value after the normalized is carried out filtration treatment.
4. according to each described method of claim 1 to 3, it is characterized in that the neighbor cell of described definite described sub-district to be predicted is specially the interference value of described each grid:
Obtain the path loss of each grid according to propagation model and each grid with respect to the distance calculation of each base station with respect to each base station;
According to the described path loss that calculates and each signal of base station transmitting power, each grid of corresponding calculating is with respect to the incoming level of each sub-district; Wherein, described each sub-district comprises: the neighbor cell of sub-district to be predicted and sub-district to be predicted;
According to the incoming level of described each grid with respect to each sub-district, the neighbor cell that calculates sub-district to be predicted is respectively to the interference value of each grid.
5. method according to claim 4 is characterized in that, each grid of described calculating is specially with respect to the incoming level of each sub-district:
Calculate each signal of base station transmitting power and each grid with respect to the difference between the path loss of each base station.
6. method according to claim 4 is characterized in that, the neighbor cell of described calculating sub-district to be predicted is specially the interference value of each grid respectively:
Calculate each grid with respect to the incoming level of sub-district to be predicted and each grid with respect to the difference between the incoming level of each neighbor cell.
7. according to each described method of claim 1 to 3, it is characterized in that described coverage with sub-district to be predicted is divided into grid and is specially:
Set up the simulation coverage diagram of sub-district to be predicted according to transmitting power, antenna directional angle, angle of declination, frequency and the propagation model of sub-district to be predicted;
By the border of described simulation coverage diagram definite sub-district to be predicted on GIS-Geographic Information System GIS map, the grid of determining not to be positioned on the GIS map outside the described border is the grid of sub-district to be predicted; Wherein, described grid is the regular length that marks off and the rectangle of width on the GIS map.
8. the interference prediction device of a sub-district is characterized in that, comprising:
Division unit is used for the coverage of sub-district to be predicted is divided into grid, and determines the latitude and longitude information of each grid correspondence;
Acquiring unit is used for obtaining the latitude and longitude information of base station, sub-district to be predicted, and obtains the latitude and longitude information and the signal transmission power of base station in the neighbor cell of described sub-district to be predicted;
Computing unit is used for the latitude and longitude information according to the latitude and longitude information of described each grid and the described base station that gets access to, calculates the distance of each grid with respect to each base station;
The interference value determining unit is used for determining the interference value of the neighbor cell of described sub-district to be predicted to described each grid according to propagation model, described each grid distance and the described neighbor cell signal of base station transmitting power with respect to each base station.
9. device according to claim 8 is characterized in that, also comprises:
Total interference value determining unit, the neighbor cell that is used for determining sub-district to be predicted and described sub-district to be predicted same frequency and with the sub-district of scrambler; According to sub-district described and to be predicted same frequency and with the neighbor cell of the scrambler interference value after to the filtration treatment of each grid, calculate total interference value of each grid.
10. device according to claim 9 is characterized in that, also comprises:
The normalization unit is used for the described neighbor cell determined is carried out normalized to the interference value of each grid;
Filter element is used for the interference value after the normalized is carried out filtration treatment, and the interference value after the filtration treatment is sent to total interference value determining unit.
11. to 10 each described devices, it is characterized in that according to Claim 8 described interference value determining unit comprises:
Path loss is determined subelement, is used for obtaining the path loss of each grid with respect to each base station according to propagation model and each grid with respect to the distance calculation of each base station;
Incoming level is determined subelement, is used for according to the described path loss and each signal of base station transmitting power that calculate, and each grid of corresponding calculating is with respect to the incoming level of each sub-district; Wherein, described each sub-district comprises: the neighbor cell of sub-district to be predicted and sub-district to be predicted;
Interference value is determined subelement, is used for according to the incoming level of described each grid with respect to each sub-district, and the neighbor cell that calculates sub-district to be predicted is respectively to the interference value of each grid.
12. to 10 each described devices, it is characterized in that division unit comprises according to Claim 8:
Coverage diagram is set up subelement, is used for the simulation coverage diagram that transmitting power, antenna directional angle, angle of declination, frequency and propagation model according to sub-district to be predicted set up sub-district to be predicted;
Grid is determined subelement, is used for determining on GIS-Geographic Information System GIS map by described simulation coverage diagram the border of sub-district to be predicted, and the grid of determining not to be positioned on the GIS map outside the described border is the grid of sub-district to be predicted; Wherein, described grid is the regular length that marks off and the rectangle of width on the GIS map;
Information is determined subelement, is used for determining the latitude and longitude information of each grid correspondence.
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