CN105992263A - Base station location offset pre-evaluation method and system - Google Patents

Abstract

The invention discloses a base station site offset pre-evaluation method and system. Among them, the method includes: obtaining information related to the site offset of the base station; using the information related to the site offset and a standard propagation model, performing grid simulation calculation on the network coverage area of the LTE network, and obtaining a network consisting of multiple grids Calculation area; for the calculation area before and after site offset, calculate the RSRP change value and SINR change value of each grid, the throughput change value of each cell, and the station distance between the offset site and the original site ;Determine whether the RSRP change value, SINR change value, throughput change value, and station distance exceed the RSRP change value threshold, SINR change value threshold, throughput change value threshold, and station distance threshold respectively, and if the judgment results are all negative Under , site offset is allowed, otherwise, site offset is prohibited. Through the invention, the effects of reducing workload and avoiding errors caused by human factors are achieved.

Description

Base station site offset pre-evaluation method and system

technical field

The invention relates to the communication field, in particular to a method and system for pre-evaluating base station site offset.

Background technique

At present, the existing site offset evaluation method mainly includes the following steps: (1) The engineering parameters of the LTE (LongTerm Evolution, long-term evolution) network (basic information such as the longitude and latitude of the cell, the height of the antenna, the azimuth angle, and the downtilt angle) , Antenna files, propagation models, city 3D maps and other information are imported into the simulation software, and the evaluators manually draw the analysis area to simulate the LTE network coverage before and after the site shift; (2) The evaluators evaluate the coverage of the LTE network before and after the base station shift The level RSRP (Reference Signal Receiving Power, reference signal received power) and the change of the signal-to-noise ratio (SINR) are qualitatively analyzed, and then the evaluation and judgment of the rationality of the site offset are given according to the analysis results.

It can be seen that the existing site offset assessment methods have the following defects: (1) As the assessor needs to analyze the offset site one by one, it will inevitably lead to a large workload and low efficiency; (2) Since each assessor draws a polygon Inconsistency, inconsistent tolerance for differences in comparison results before and after simulation, will inevitably lead to differences in evaluation results caused by human factors; (3) The dimensions and rules of evaluation cannot be clearly quantified.

Contents of the invention

The main purpose of the present invention is to provide a pre-evaluation scheme that can automatically perform data simulation calculation using the set evaluation principles, and output an analysis report according to the simulation results to indicate whether to agree to site offset.

In order to achieve the above object, the present invention provides a method and system for pre-estimating base station site offset.

According to one aspect of the present invention, a method for pre-evaluating base station site offset is provided, including: obtaining site offset related information of the base station; The grid coverage area of the network is simulated and calculated to obtain a calculation area composed of multiple grids; for the calculation area before and after the site offset, the reference signal received power (RSRP) change value and signal Interference plus noise ratio (SINR) change value, throughput change value of each cell, and station distance between the offset site and the original site; determine RSRP change value, SINR change value, throughput change value, and Whether the station distance exceeds the RSRP change value threshold, SINR change value threshold, throughput change value threshold, and station distance threshold respectively. If the judgment results are all negative, site offset is allowed; otherwise, site offset is prohibited.

Preferably, the site offset related information includes: network engineering parameters, electronic map, antenna model data, and offset site information, wherein the offset site information includes all engineering parameter information of the cell before and after the site offset.

Preferably, grid simulation calculation is performed on the network coverage area of the Long Term Evolution (LTE) network to obtain a calculation area composed of multiple grids, including: taking the original site of the current base station as the center of the circle, and using a predetermined search value as the search area The radius delineates the search area, wherein the predetermined search value is equal to the average station spacing of the LTE network multiplied by a predetermined coefficient; the search area is divided into a plurality of fan-shaped areas with equal angles, and for the fan-shaped area with base stations, the original distance in the area is determined The nearest base station is the boundary point of the calculation area; the calculation area is determined according to multiple boundary points.

Preferably, the following formula is used to calculate the RSRP change value: RSRP change value=RSRP coverage before site offset-RSRP coverage after site offset, wherein, RSRP coverage before site offset=site offset The number of grids whose RSRP value is greater than the RSRP threshold before the shift/the total number of grids before the offset, the RSRP coverage rate after the site offset = the number of grids whose RSRP value is greater than the RSRP threshold after the site offset/offset After the total number of grids; use the following formula to calculate the SINR change value: SINR change value = SINR coverage before site offset - SINR coverage after site offset, where, SINR coverage before site offset =Number of grids with SINR value greater than SINR threshold before site offset/total grid number before offset, SINR coverage after site offset=Grids with SINR value greater than SINR threshold after site offset Number/total number of grids after offset.

Preferably, after the judgment result is obtained, the method further includes: outputting a pre-assessment report indicating that site offset is allowed or prohibited.

According to another aspect of the present invention, a base station site offset pre-evaluation system is provided, including: an acquisition module for acquiring site offset related information of the base station; a simulation calculation module for using the site offset correlation Information and standard propagation model, grid simulation calculation is performed on the network coverage area of the long-term evolution (LTE) network, and the calculation area composed of multiple grids is obtained; the calculation module is used for the calculation area before and after the site offset, Calculate the reference signal received power (RSRP) change value and signal-to-interference-plus-noise ratio (SINR) change value for each grid, the throughput change value of each cell, and the station between the offset site and the original site Spacing; judging module, used to judge the RSRP change value, SINR change value, throughput change value, and whether the station distance exceeds the RSRP change value threshold, the SINR change value threshold, the throughput change value threshold, and the station distance threshold respectively, in judging If the results are all negative, site offset is allowed; otherwise, site offset is prohibited.

Preferably, the site offset related information includes: network engineering parameters, electronic map, antenna model data, and offset site information, wherein the offset site information includes all engineering parameter information of the cell before and after the site offset.

Preferably, the simulation calculation module includes: a delineation unit, which is used to delimit the search area with the original site of the current base station as the center of the circle, and use the predetermined search value as the search radius, wherein the predetermined search value is equal to the average station distance of the LTE network multiplied by Predetermined coefficient; Division unit, is used for dividing search area into a plurality of fan-shaped areas with equally divided angles, for the fan-shaped area with base station, determine the boundary point of the calculation area from the base station closest to the original site in the area; Determine unit, Used to determine the calculation area based on multiple boundary points.

Preferably, the calculation module includes: a first calculation unit, which is used to calculate the RSRP change value using the following formula: RSRP change value = RSRP coverage before site offset - RSRP coverage after site offset, wherein, site RSRP coverage before site offset = number of grids whose RSRP value is greater than the RSRP threshold before site offset / total number of grids before offset, RSRP coverage after site offset = RSRP value after site offset The number of grids greater than the RSRP threshold/the total number of grids after offset; the second calculation unit is used to calculate the SINR change value using the following formula: SINR change value = SINR coverage before site offset - site offset The SINR coverage after the shift, where, the SINR coverage before the site offset = the number of grids whose SINR value is greater than the SINR threshold before the site offset / the total number of grids before the offset, and the number of grids after the site offset SINR coverage = the number of grids whose SINR value is greater than the SINR threshold after site offset / the total number of grids after offset.

Preferably, the above system further includes: an output report module, configured to output a pre-assessment report indicating that site offset is allowed or prohibited after the determination result of the determination module is obtained.

Compared with the prior art, the base station site offset pre-evaluation method and system described in the present invention, through the evaluation principles set in advance, automatically analyzes the simulation results by software, and outputs an analysis report to indicate whether to agree to conduct site offset evaluation. Offset, through such an automatic execution method, considers the change of network business capabilities in multiple dimensions, and achieves the effect of reducing workload and avoiding errors caused by human factors.

Description of drawings

Fig. 1 is a flow chart of a method for pre-estimating base station site offset according to an embodiment of the present invention;

FIG. 2 is a structural block diagram of a base station site offset pre-evaluation system according to an embodiment of the present invention;

Fig. 3 is a structural block diagram of a preferred base station site offset pre-evaluation system according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a site offset pre-assessment system according to a preferred embodiment of the present invention;

Fig. 5 is a schematic diagram of the operation of determining a search area according to a preferred embodiment of the present invention;

Fig. 6 is a schematic diagram of performing SNR level setting according to a preferred embodiment of the present invention; and

Fig. 7 is a schematic diagram of an output analysis report after the pre-assessment is completed according to a preferred embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An embodiment of the present invention provides a method for pre-estimating base station site offset. Fig. 1 is a flow chart of a method for pre-evaluating base station site offset according to an embodiment of the present invention. As shown in Fig. 1, the process includes the following steps (step S102-step S108):

Step S102 , acquiring site offset related information of the base station.

Step S104 , using the information related to the site offset and the standard propagation model, performing grid simulation calculation on the network coverage area of the Long Term Evolution (LTE) network, and obtaining a calculation area composed of multiple grids.

Step S106, for the calculation area before and after the site offset, calculate the change value of the reference signal received power (RSRP) and the change value of the signal-to-interference-plus-noise ratio (SINR) of each grid, and the change value of the throughput of each cell, And the station spacing between the offset site and the original site.

Step S108, determine whether the RSRP change value, the SINR change value, the throughput change value, and the station distance exceed the RSRP change value threshold, the SINR change value threshold, the throughput change value threshold, and the station distance threshold respectively, and the judgment results are all no In the case of , the site offset is allowed, otherwise, the site offset is prohibited.

Through the above steps, multiple parameters such as RSRP change value, SINR change value, throughput change value, and station distance can be referred to at the same time, so that multi-dimensional simulation can be carried out. After comprehensive consideration, these change values do not exceed the preset threshold Only when the value is met, the decision to allow the base station to perform site offset is made; otherwise, the base station is prohibited from performing site offset.

In this embodiment, the site offset-related information may include: network engineering parameters (also referred to as network information for short), electronic maps, antenna model data, and offset site information, wherein the offset site information includes All engineering parameter information of the cell before and after the address offset.

In step S104 of this embodiment, when performing grid simulation calculation on the network coverage area of the Long Term Evolution (LTE) network, a calculation area composed of multiple grids is obtained, which can be implemented in this way:

(1) Take the original site of the current base station as the center of the circle, and delineate the search area with a predetermined search value as the search radius, wherein the predetermined search value is equal to the average station distance of the LTE network multiplied by a predetermined coefficient; (2) divide the search area into For multiple fan-shaped areas with equally divided angles, for a fan-shaped area with base stations, determine the base station closest to the original site in the area as the boundary point of the calculation area; (3) determine the calculation area based on multiple boundary points.

In the above step S106, the following formula can be used to calculate the RSRP change value:

RSRP change value = RSRP coverage before site offset - RSRP coverage after site offset, where, RSRP coverage before site offset = grid number of grids whose RSRP value is greater than the RSRP threshold before site offset Number/total number of grids before offset, RSRP coverage after site offset = number of grids with RSRP value greater than RSRP threshold after site offset/total number of grids after offset;

At the same time, the SINR change value can be calculated using the following formula: SINR change value = SINR coverage before site offset - SINR coverage after site offset, where SINR coverage before site offset = site offset The number of grids whose SINR value is greater than the SINR threshold before the shift/the total number of grids before the offset, the SINR coverage after the site offset = the number of grids whose SINR value is greater than the SINR threshold after the site offset/offset The total number of rasters.

In this embodiment, further after the above step S108 is performed, a pre-assessment report for indicating that site offset is allowed or prohibited may be output.

Corresponding to the base station site offset pre-estimation method provided in the above embodiments, the embodiment of the present invention further provides a base station site offset pre-estimation system, which is used to implement the above base station site offset pre-estimation method. Fig. 2 is a structural block diagram of a base station site offset pre-assessment system according to an embodiment of the present invention. As shown in Fig. 2 , the base station site offset pre-assessment system includes: an acquisition module 10, a simulation calculation module 20, and a calculation module 30 , and the decision module 40, wherein:

An acquisition module 10, configured to acquire site offset related information of the base station;

The simulation calculation module 20 is used to use the site offset related information and the standard propagation model to perform grid simulation calculation on the network coverage area of the Long Term Evolution (LTE) network, and obtain a calculation area composed of multiple grids;

The calculation module 30 is used to calculate the reference signal received power (RSRP) change value and the signal-to-interference-plus-noise ratio (SINR) change value of each grid for the calculation area before and after the site offset, and the throughput of each cell Change value, and the station spacing between the offset site and the original site;

Judgment module 40, is used for judging RSRP change value, SINR change value, throughput change value, and station distance exceed RSRP change value threshold value, SINR change value threshold value, throughput change value threshold value respectively, and station distance threshold value, in judging result If both are No, site offset is allowed, otherwise, site offset is prohibited.

In this embodiment, the site offset related information may include: network engineering parameters, electronic maps, antenna model data, and offset site information, wherein the offset site information includes all engineering of the cell before and after the site offset Parameter information.

On the basis of the base station site offset pre-estimation system shown in FIG. 2 , an embodiment of the present invention also provides a preferred base station site offset pre-estimation system. Fig. 3 is a structural block diagram of a preferred base station site offset pre-evaluation system according to an embodiment of the present invention. As shown in Fig. 3, in the preferred base station site offset pre-evaluation system:

The simulation calculation module 20 may further include: a delimiting unit 22, which is used to delineate the search area with the original site of the current base station as the center of the circle and a predetermined search value as the search radius, wherein the predetermined search value is equal to the average station distance of the LTE network multiplied by With predetermined coefficient; Divide unit 24, be used for dividing search area into a plurality of fan-shaped areas with equally divided angles, for the fan-shaped area with base station, determine the boundary point of the calculation area from the base station closest to the original site in the area; determine A unit 26, configured to determine a calculation area according to a plurality of boundary points.

Computing module 30 may further include:

The first calculation unit 32 is used to calculate the RSRP change value using the following formula: RSRP change value=RSRP coverage rate before the site offset-RSRP coverage rate after the site offset, wherein, the RSRP coverage before the site offset Rate = the number of grids whose RSRP value is greater than the RSRP threshold before the site offset / the total number of grids before the offset, and the RSRP coverage rate after the site offset = the grids whose RSRP value is greater than the RSRP threshold after the site offset Number/total number of grids after offset;

The second calculation unit 34 is used to calculate the SINR change value using the following formula: SINR change value=SINR coverage rate before the site offset-the SINR coverage rate after the site offset, wherein, the SINR coverage before the site offset Ratio = number of grids with SINR value greater than SINR threshold before site offset / total number of grids before offset, SINR coverage after site offset = grid with SINR value greater than SINR threshold after site offset Number/total number of grids after offset.

Preferably, the preferred base station site offset pre-evaluation system may also include: an output report module 50, which is used to output a report indicating that the site offset is allowed or prohibited after the determination result of the determination module 40 is obtained. pre-assessment report.

For ease of understanding, the implementation process of the above-mentioned embodiment will be described in more detail below with reference to FIG. 4 to FIG. 6 and preferred embodiments.

preferred embodiment

This preferred embodiment is mainly based on the simulation results of wireless network coverage, and establishes a site offset evaluation algorithm model from the perspective of network structure, so as to automatically determine whether the network site offset is within an acceptable range.

Fig. 4 is a schematic structural diagram of a site offset pre-assessment system according to a preferred embodiment of the present invention. As shown in Fig. 4, the site offset pre-assessment system includes: network and offset site information input subsystem, coverage simulation A subsystem, a site offset evaluation subsystem, and a site offset judgment subsystem.

Based on the site offset pre-assessment system, the specific implementation process of the base station site offset pre-assessment method provided in the above embodiment is as follows:

First, input network engineering parameters, electronic map and site offset information in the network and offset site information input subsystem, and then use the coverage simulation subsystem to rasterize the coverage area of the TD-LTE network to generate each RS-RSRP and RS-SINR of the cell in each grid. Then, the site offset evaluation subsystem quantifies and evaluates the RS-RSRP, RS-SINR, network throughput and station distance in the relevant area before and after the site offset. Finally, the site offset judgment subsystem compares various quantitative indicators (RSRP, SINR, and network throughput, etc.) before and after the site offset, and outputs the final judgment result.

1. Network and offset site information input

For network engineering parameters, please refer to Table 1. Network engineering parameters specifically include the contents shown in Table 1:

Table 1

Electronic map, including terrain (Height) information, landform (Clutter) information, building (Building) information, vector information (Vector), etc.

Antenna model data, including antenna gain at different horizontal angles and vertical angles, can be obtained from antenna manufacturers according to the type of antenna.

The offset site information includes: all engineering parameters of the cell before and after the site offset.

2. Overlay simulation

Based on the network information and offset site information, the grid coverage simulation calculation of the network coverage area is carried out through the corrected propagation model, and the RS-RSRP value and RS-SINR value.

(1) Calculate RSRP using the standard SPM model:

PL=K1+K2*lg(d)+K3*lg(Heff)+Kdiff*Diff_Loss+K4*lg(Heff)*lg(d)+K5*(hm)+Clutter_Offset where:

PL is path loss, K1 is fixed loss, K2 is a factor of loss linearly related to propagation distance, K3 is a factor of propagation loss due to transmitter height, Kdiff is diffraction loss factor, Diff_Loss is diffraction loss factor due to obstacles (dB), K4 is the gain caused by considering the transmission height and distance, usually a negative value, when the receiver is far away and the transmitter is high, the loss reduction can be considered, K5 is the receiver height factor, d is the base station and mobile station The distance between them (unit: meter), Heff is the effective height of the base station (unit: meter), and hm is the height of the mobile station (unit: meter).

(2) Calculate the SINR using the following formula:

SINR=Signal/(Interference+Noise), where S represents the power of the measured useful signal, and the main signals and channels of interest include: RS (Reference Signal, reference signal), PDSCH (Physical Downlink Shared Channel, physical downlink shared channel ), I represents the power of the measured signal or channel interference signal, including the interference of other cells in the system and the interference of different systems, N represents low noise, which is related to the specific measurement bandwidth and the noise figure of the receiver.

3. Site offset evaluation

The site offset evaluation subsystem performs quantitative evaluation on the RS-RSRP, RS-SINR, download rate and station distance of the network-related areas before and after the site offset. The steps are as follows:

(1) Determine the calculation area

As shown in the figure below, follow the steps below to determine the calculation area:

The first step is to determine the search radius, which can be determined according to the average station distance of the network, for example, 1.5 times the average station distance as the search radius;

The second step is to determine the 360-degree equal-division angle, and take 60 degrees as the equal-division angle. According to the equal-division principle, the 360-degree around the original station site is divided into A0, A1, A2, A3, A4, and A56, which are 60 respectively. For the fan-shaped area of degree, please refer to FIG. 5 for details (FIG. 5 is a schematic diagram of the operation of determining the search area according to a preferred embodiment of the present invention).

The third step is to determine the calculation cells in the equally divided areas A0, A1, A2, A3, A4, and A5, and use the three cells covered by the base station closest to the original site in each area as the calculation cells. If there is no cell, no calculation cell is set for the equally divided area.

The fourth step is to determine the calculation area. The calculation area is the coverage area of each calculation cell (including the cell corresponding to the original site or offset site) as the master (that is, the RSRP of this cell has the largest value in the grid).

(2) Evaluation of RSRP variation

Perform statistical calculations on the RSRP values of all grids in the calculation area, as follows:

RSRP variation = RSRP coverage (before migration) - RSRP coverage (after migration) = number of grids whose RSRP value is greater than the RSRP threshold before migration / total number of grids before migration - RSRP value after migration The number of grids greater than the RSRP threshold/the total number of grids after the offset. In practical applications, the pre-selection of the RSRP threshold can have multiple options. For example, in this preferred embodiment, the preferred value is -100dB;

After the RSRP variation is obtained, it needs to be compared with the preset RSRP variation threshold (that is, the RSRP variation threshold in the above-mentioned embodiment), and if the calculated RSRP variation has exceeded the RSRP variation threshold, it is necessary to prohibit Site offset.

(3) Evaluation of SINR variation

Perform statistical calculations on the SINR values of all grids in the calculation area, as follows:

SINR variation = SINR coverage (before migration) - SINR coverage (after migration) = number of grids whose SINR value is greater than the SINR threshold before migration / total number of grids before migration - SINR after migration The value is greater than the grid number of SINR threshold/the total number of grids after the offset. In practical applications, the pre-selection of SINR threshold can have multiple options. For example, in this preferred embodiment, the preferred value is -3dB ;

After obtaining the SINR variation, it needs to be compared with the preset SINR variation threshold (that is, the SINR variation threshold in the above-mentioned embodiment), and if the calculated SINR variation has exceeded the SINR variation threshold, it is necessary to prohibit Site offset.

(4) Evaluation of throughput variation

Step 1: Automatic distribution of users based on configurable models

Obtain the RSRP value and SINR value of each grid through coverage simulation, define the grid as good, medium, and poor according to the RSRP and SINR values, and randomly assign UEs to the grids that meet the corresponding conditions according to the Poisson distribution , and in the evaluation process before and after the site shift, the location of the user is fixed, which can effectively determine the change of the user throughput before and after the site change. Wherein, the process of defining the grid can refer to FIG. 6 (FIG. 6 is a schematic diagram of setting the signal-to-noise ratio level according to a preferred embodiment of the present invention).

Wherein, the Poisson distribution, wherein, k=0, 1, 2, ..., n, can be calculated from the following formula:

where e is the base of the natural logarithm equal to 2.71828, k is the number of occurrences (of which the probability is given by the function), K is the factorial of k, and λ is a positive real number equal to the occurrence within a predetermined time interval expected number of .

Step 2: Calculation of grid throughput

Use the following throughput calculation formula:

Throughput_dl=S*(NPDSCH*Mode*Rate)/length, where S represents the number of layers of spatial multiplexing, NPDSCH represents the number of REs occupied by PDSCH, Mode represents the modulation method, Rate represents the coding efficiency, and Length represents the length of a wireless frame , the size of Mode and Rate depends on the SINR value of the interference level of the simulation result, which can be obtained from Table 2. S and length are fixed values, and NPDSCH can also be a fixed value for specific services.

Table 2

According to the SINR value of each grid, and then calculate the throughput of each user before and after the offset (that is, the amount of throughput change) according to the above throughput calculation formula;

After obtaining the throughput change, it needs to be compared with the preset throughput change threshold (that is, the throughput change value threshold in the above-mentioned embodiment), if the calculated throughput change has exceeded the throughput change threshold, it is necessary to prohibit site offset.

(5) Calculation of station spacing after site offset

After calculating the offset, the distance between the site and all the cells in the calculation area is as follows:

The station distance between cell A and cell B=SQRT((longitude of cell A-longitude of cell B)^2+(latitude of cell A-latitude of cell B)^2).

(6) Calculation of site offset

After calculating the station distance between the offset site and the original station site, after obtaining the station distance, it needs to be compared with the preset change threshold of the station distance (that is, the station distance threshold in the above-mentioned embodiment), if the calculated station If the distance change has exceeded the change threshold of the station distance, it is necessary to prohibit the site offset.

4. Judgment of site offset

Based on the above results of comparing each calculation object (RSRP change value, SINR change value, throughput change value, and station distance change value) with the corresponding change threshold, as long as one object exceeds the preset change value threshold, site offset is prohibited, and site offset is allowed only if all objects do not exceed the change value threshold. In this preferred embodiment, from the point of view of the effect of the site offset, this method can also be used: determine whether the average throughput of users in the area after the offset is higher than that before the offset, and if it is higher, agree to the offset , otherwise, disagree with the offset, and output the analysis report (please refer to Figure 7).

Through the above-mentioned preferred embodiment, the following effects can be achieved: (1) by artificially setting the evaluation principle, the site offset evaluation system analysis is used to replace the method of personnel analyzing the site offset one by one, which can greatly reduce the workload and improve work efficiency; 2) All the evaluation work is statistically analyzed by the simulation software. There is no need to artificially draw polygons and compare the simulation results before and after. (3) The existing site offset evaluation method mainly judges whether the offset is by comparing the coverage simulation results before and after the site offset. This application uses the multi-dimensional evaluation principle, except for the Coverage simulation also requires business simulation.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also It should be considered as included within the protection scope of the present invention.

Claims (10)

1. a base station site skew Pre-Evaluation method, it is characterised in that including:

Obtain the site excursion relevant information of base station；

Use described site excursion relevant information and standard propagation model, the net to Long Term Evolution LTE network Network overlay area carries out rasterizing simulation calculation, obtains the zoning being made up of multiple grids；

For the described zoning before and after site excursion, the reference signal calculating each described grid receives merit Rate RSRP changing value and Signal to Interference plus Noise Ratio SINR changing value, the handling capacity change of each community Station spacing between value, and skew site and former site；

Judge described RSRP changing value, described SINR changing value, described handling capacity changing value, Yi Jisuo State station spacing the most respectively more than RSRP changing value threshold value, SINR changing value threshold value, handling capacity changing value Threshold value, and station spacing threshold value, judged result be no in the case of, it is allowed to site excursion, otherwise, Forbid site excursion.

Method the most according to claim 1, it is characterised in that described site excursion relevant information bag Include: network engineering parameter, electronic chart, antenna model data, and skew site information, wherein, partially Station transfer location information includes all engineering parameter information of community before and after site excursion.

Method the most according to claim 1, it is characterised in that the net to Long Term Evolution LTE network Network overlay area carries out rasterizing simulation calculation, obtains the zoning being made up of multiple grids, including:

With the former site of current base station as the center of circle, delimit region of search using predetermined search value as search radius, Wherein, described predetermined search value is multiplied by pre-determined factor equal to the average station distance of described LTE network；

Described region of search is divided into multiple sector region with decile angle, for having the fan of base station Shape region, determines the boundary point that base station is described zoning that in region, former site described in distance is nearest；

Described zoning is determined according to multiple boundary points.

Method the most according to claim 1, it is characterised in that

The use below equation described RSRP changing value of calculating:

After RSRP coverage rate-described site excursion before described RSRP changing value=site excursion RSRP coverage rate, wherein, RSRP before the RSRP coverage rate=site excursion before described site excursion Value is total grid number, the RSRP after described site excursion more than before the grid number/skew of RSRP thresholding After coverage rate=site excursion, RSRP value is more than grid total after the grid number/skew of described RSRP thresholding Number；

The use below equation described SINR changing value of calculating:

The SINR after SINR coverage rate-site excursion before described SINR changing value=site excursion Coverage rate, wherein, before the SINR coverage rate=site excursion before described site excursion, SINR value is more than Total grid number before the grid number/skew of SINR thresholding, the SINR coverage rate after described site excursion= After site excursion, SINR value is more than grid number total after the grid number/skew of described SINR thresholding.

Method the most according to any one of claim 1 to 4, it is characterised in that

After obtaining described judged result, also include: output is used for indicating permission site excursion or forbidding station The Pre-Evaluation report of location skew.

6. a base station site skew Pre-Evaluation system, it is characterised in that including:

Acquisition module, for obtaining the site excursion relevant information of base station；

Simulation algorithm model, is used for using described site excursion relevant information and standard propagation model, to for a long time The network's coverage area of evolution LTE network carries out rasterizing simulation calculation, obtains being made up of multiple grids Zoning；

Computing module, for for the described zoning before and after site excursion, calculates each described grid Reference Signal Received Power RSRP changing value and Signal to Interference plus Noise Ratio SINR changing value, Mei Ge little Station spacing between the handling capacity changing value in district, and skew site and former site；

Determination module, is used for judging described RSRP changing value, described SINR changing value, described handling capacity Changing value, and described station spacing the most respectively more than RSRP changing value threshold value, SINR changing value threshold value, Handling capacity changing value threshold value, and station spacing threshold value, judged result be no in the case of, it is allowed to site Skew, otherwise, forbids site excursion.

System the most according to claim 6, it is characterised in that described site excursion relevant information bag Include: network engineering parameter, electronic chart, antenna model data, and skew site information, wherein, partially Station transfer location information includes all engineering parameter information of community before and after site excursion.

System the most according to claim 6, it is characterised in that described simulation algorithm model includes:

Delimit unit, for the former site of current base station as the center of circle, using predetermined search value as search radius Delimiting region of search, wherein, described predetermined search value is multiplied by equal to the average station distance of described LTE network Pre-determined factor；

Division unit is for described region of search is divided into multiple sector region with decile angle, right In having the sector region of base station, determine that the base station that in region, former site described in distance is nearest is described calculating district The boundary point in territory；

Determine unit, for determining described zoning according to multiple boundary points.

System the most according to claim 6, it is characterised in that described computing module includes:

Described first computing unit, is used for using below equation to calculate described RSRP changing value:

After RSRP coverage rate-described site excursion before described RSRP changing value=site excursion RSRP coverage rate, wherein, RSRP before the RSRP coverage rate=site excursion before described site excursion Value is total grid number, the RSRP after described site excursion more than before the grid number/skew of RSRP thresholding After coverage rate=site excursion, RSRP value is more than grid total after the grid number/skew of described RSRP thresholding Number；

Described second computing unit, is used for using below equation to calculate described SINR changing value:

The SINR after SINR coverage rate-site excursion before described SINR changing value=site excursion Coverage rate, wherein, before the SINR coverage rate=site excursion before described site excursion, SINR value is more than Total grid number before the grid number/skew of SINR thresholding, the SINR coverage rate after described site excursion= After site excursion, SINR value is more than grid number total after the grid number/skew of described SINR thresholding.

10. according to the system according to any one of claim 6 to 9, it is characterised in that

Described system also includes: output report module, for obtain described determination module judged result it After, output allows site excursion for indicating or forbids the Pre-Evaluation report of site excursion.