CN105992263A - Base station location offset pre-evaluation method and system - Google Patents
Base station location offset pre-evaluation method and system Download PDFInfo
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- CN105992263A CN105992263A CN201510043446.7A CN201510043446A CN105992263A CN 105992263 A CN105992263 A CN 105992263A CN 201510043446 A CN201510043446 A CN 201510043446A CN 105992263 A CN105992263 A CN 105992263A
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Abstract
The invention discloses a base station location offset pre-evaluation method and a system. The method comprises the steps of acquiring the station location offset related information of a base station; conducting the grid-type simulation calculation on the network coverage area of the LTE network based on the station location offset related information and a standard propagation model so as to obtain a calculation region composed of a plurality of grids; for the calculation region before and after the location offset of the base station, calculating the RSRP change value and the SINR change value of each grid, the throughput change value of each cell, and the station spacing between the offset station location and the original station location of the base station; judging whether the RSRP change value, the SINR change value, the throughput change value and the station spacing respectively exceed an RSRP change value threshold, an SINR change value threshold, a throughput change value threshold and a station spacing threshold or not; on the condition that no of the above four values exceeds the corresponding threshold, allowing the location offset of the base station; otherwise, forbidding the location offset of the base station. According to the invention, the workload is reduced. Meanwhile, the error caused by human factors can be avoided.
Description
Technical field
The present invention relates to the communications field, especially relate to a kind of base station site skew Pre-Evaluation method and system.
Background technology
At present, existing site offset appraisal procedure mainly comprises the steps that (1) is by LTE (Long
Term Evolution, Long Term Evolution) network engineering parameter (longitude and latitude of community, antenna extension high,
The Back ground Information such as azimuth and angle of declination), the information such as sky line file, propagation model, city 3D map
Import simulation software, by the LTE net carried out after appraiser's hand drawn analyzed area before and after site offset
Network emulation of coverage capability；(2) by appraiser to the covering level RSRP of LTE network before and after base station drift
(Reference Signal Receiving Power, Reference Signal Received Power) and signal to noise ratio (SINR)
Situation of change carry out qualitative analysis, further according to analysis result be given site offset rational assessment judge.
It can be seen that there is following defect in existing site offset appraisal procedure: (1) is due to needs assessment people
Skew website is analyzed by member one by one, necessarily causes workload big and inefficiency；(2) due to each
It is inconsistent that appraiser draws polygon, inconsistent to the difference tolerance of comparing result before and after emulation, inevitable
Assessment result is caused to there is the difference that anthropic factor causes；(3) dimension assessed and rule can not specific quantity
Change.
Summary of the invention
Present invention is primarily targeted at offer a kind of can use the assessment principle set automatically to count
According to simulation calculation, and export analysis report according to simulation result, to indicate whether to agree to carry out site excursion
Pre-Evaluation scheme.
In order to achieve the above object, the invention provides a kind of base station site skew Pre-Evaluation method and system.
According to an aspect of the invention, it is provided a kind of base station site skew Pre-Evaluation method, including: obtain
Take the site excursion relevant information of base station；Use site excursion relevant information and standard propagation model, to for a long time
Evolution (LTE) network of network overlay area carries out rasterizing simulation calculation, obtains being made up of multiple grids
Zoning；For the zoning before and after site excursion, the reference signal calculating each grid receives merit
Rate (RSRP) changing value and Signal to Interference plus Noise Ratio (SINR) changing value, the handling up of each community
Amount changing value, and the station spacing between skew site and former site；Judge RSRP changing value, SINR
Changing value, handling capacity changing value, and station spacing is 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, be no situation in judged result
Under, it is allowed to site excursion, otherwise, forbid site excursion.
Preferably, site excursion relevant information includes: network engineering parameter, electronic chart, antenna model number
According to, and skew site information, wherein, all works of community before and after skew site information includes site excursion
Journey parameter information.
Preferably, Long Term Evolution (LTE) network of network overlay area is carried out rasterizing simulation calculation,
Obtain the zoning being made up of multiple grids, including: with the former site of current base station as the center of circle, with predetermined
Search value delimit region of search as search radius, and wherein, predetermined search value is average equal to LTE network
Station spacing is multiplied by pre-determined factor；Region of search is divided into multiple sector region with decile angle, for
Have the sector region of base station, determine the border that base station is zoning that in region, the former site of distance is nearest
Point；Zoning is determined according to multiple boundary points.
Preferably, below equation is used to calculate RSRP changing value: before RSRP changing value=site excursion
RSRP coverage rate-site excursion after RSRP coverage rate, wherein, the RSRP before site excursion
RSRP value total grid front more than the grid number/skew of RSRP thresholding before coverage rate=site excursion
Number, after the RSRP coverage rate=site excursion after site excursion, RSRP value is more than the grid of RSRP thresholding
Total grid number after lattice number/skew；Use below equation calculating SINR changing value: SINR changing value=
The SINR coverage rate after SINR coverage rate-site excursion before site excursion, wherein, before site excursion
SINR coverage rate=site excursion before SINR value more than before the grid number/skew of SINR thresholding always
Grid number, after the SINR coverage rate=site excursion after site excursion, SINR value is more than SINR thresholding
Grid number/skew after total grid number.
Preferably, after obtaining judged result, also include: output is used for indicating permission site excursion or taboo
The only Pre-Evaluation report of site excursion.
According to another aspect of the present invention, it is provided that a kind of base station site skew Pre-Evaluation system, including:
Acquisition module, for obtaining the site excursion relevant information of base station；Simulation algorithm model, is used for using site
Skew relevant information and standard propagation model, carried out Long Term Evolution (LTE) network of network overlay area
Rasterizing simulation calculation, obtains the zoning being made up of multiple grids；Computing module, for for site
Zoning before and after skew, calculate each grid Reference Signal Received Power (RSRP) changing value and
Signal to Interference plus Noise Ratio (SINR) changing value, the handling capacity changing value of each community, and skew
Station spacing between site and former site；Determination module, is used for judging that RSRP changing value, SINR change
Value, handling capacity changing value, and station spacing is the most respectively more than RSRP changing value threshold value, SINR change
Value threshold value, handling capacity changing value threshold value, and station spacing threshold value, judged result be no in the case of,
Allow site excursion, otherwise, forbid site excursion.
Preferably, site excursion relevant information includes: network engineering parameter, electronic chart, antenna model number
According to, and skew site information, wherein, all works of community before and after skew site information includes site excursion
Journey parameter information.
Preferably, simulation algorithm model includes: delimit unit, for the former site of current base station as the center of circle,
Delimiting region of search using predetermined search value as search radius, wherein, predetermined search value is equal to LTE network
Average station distance be multiplied by pre-determined factor；Division unit, multiple has decile for being divided into region of search
The sector region of angle, for having the sector region of base station, determines the base that in region, the former site of distance is nearest
Stand the boundary point for zoning；Determine unit, for determining zoning according to multiple boundary points.
Preferably, computing module includes: the first computing unit, is used for using below equation to calculate RSRP and becomes
Change value: the RSRP after RSRP coverage rate-site excursion before RSRP changing value=site excursion covers
Lid rate, wherein, before the RSRP coverage rate=site excursion before site excursion, RSRP value is more than RSRP
Total grid number, the RSRP coverage rate=site excursion after site excursion before the grid number/skew of thresholding
Rear RSRP value is total grid number more than after the grid number/skew of RSRP thresholding；Second computing unit,
For using below equation to calculate SINR changing value: the SINR before SINR changing value=site excursion covers
SINR coverage rate after lid rate-site excursion, wherein, the SINR coverage rate before site excursion=stand
SINR value total grid number front more than the grid number/skew of SINR thresholding before the skew of location, after site excursion
SINR coverage rate=site excursion after SINR value total more than after the grid number/skew of SINR thresholding
Grid number.
Preferably, said system also includes: output report module, for tying in the judgement obtaining determination module
After Guo, output allows site excursion for indicating or forbids the Pre-Evaluation report of site excursion.
Compared with prior art, base station site of the present invention skew Pre-Evaluation method and system, lead in advance
The assessment principle set, is automatically analyzed simulation result by software, and exports analysis report to indicate whether
Agree to carry out site excursion, by such automated execution mode, consider network simultaneously various dimensions
Professional ability changes, and has reached to reduce workload, has avoided the effect of the error brought due to anthropic factor.
Accompanying drawing explanation
Fig. 1 is base station site skew Pre-Evaluation method flow diagram according to embodiments of the present invention；
Fig. 2 is the structured flowchart of base station site skew Pre-Evaluation system according to embodiments of the present invention；
Fig. 3 is the structured flowchart of preferred base station site skew Pre-Evaluation system according to embodiments of the present invention；
Fig. 4 is the structural representation of site excursion Pre-Evaluation system according to the preferred embodiment of the invention；
Fig. 5 is the operation chart determining region of search according to the preferred embodiment of the invention；
Fig. 6 is the schematic diagram carrying out signal to noise ratio grade setting according to the preferred embodiment of the invention；And
Fig. 7 is the schematic diagram of the analysis report of output after Pre-Evaluation completes according to the preferred embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the present invention, and not
It it is whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art is not making
The every other embodiment obtained on the premise of creative work, broadly falls into the scope of protection of the invention.
Embodiments provide a kind of base station site skew Pre-Evaluation method.Fig. 1 is real according to the present invention
Execute the base station site skew Pre-Evaluation method flow diagram of example, as it is shown in figure 1, this flow process comprises the following steps (step
Rapid S102-step S108):
Step S102, the site excursion relevant information of acquisition base station.
Step S104, use site excursion relevant information and standard propagation model, to Long Term Evolution (LTE)
Network of network overlay area carries out rasterizing simulation calculation, obtains the zoning being made up of multiple grids.
Step S106, for the zoning before and after site excursion, the reference signal calculating each grid connects
Receive power (RSRP) changing value and Signal to Interference plus Noise Ratio (SINR) changing value, each community
Station spacing between handling capacity changing value, and skew site and former site.
Step S108, judge RSRP changing value, SINR changing value, handling capacity changing value, and between station
Away from 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 station
Location offsets.
By each step above-mentioned, can be with reference to RSRP changing value, SINR changing value, handling capacity
Changing value and the multiple parameter of station spacing such that it is able to emulate, become considering these various dimensions
In the case of change value is without departing from threshold value set in advance, just makes agreement base station and carry out site excursion
Determine, otherwise, forbid that base station carries out site excursion.
In the present embodiment, site excursion relevant information may include that network engineering parameter (can also be called for short
For the network information), electronic chart, antenna model data, and skew site information, wherein, skew station
Location information includes all engineering parameter information of community before and after site excursion.
In step S104 of the present embodiment, when to Long Term Evolution (LTE) network of network overlay area
Carry out rasterizing simulation calculation, obtain the zoning being made up of multiple grids, can adopt in such a way
Realize:
(1) with the former site of current base station as the center of circle, search delimited using predetermined search value as search radius
Region, wherein, predetermined search value is multiplied by pre-determined factor equal to the average station distance of LTE network；(2) will
Region of search is divided into multiple sector region with decile angle, for having the sector region of base station, really
Determine the boundary point that base station is zoning that the former site of distance in region is nearest；(3) true according to multiple boundary points
Determine zoning.
In above-mentioned steps S106, it is possible to use below equation calculating RSRP changing value:
RSRP after RSRP coverage rate-site excursion before RSRP changing value=site excursion covers
Rate, wherein, before the RSRP coverage rate=site excursion before site excursion, RSRP value is more than RSRP door
Total grid number before the grid number/skew of limit, after the RSRP coverage rate=site excursion after site excursion
RSRP value is total grid number more than after the grid number/skew of RSRP thresholding；
Simultaneously, it is possible to use below equation calculates SINR changing value: before SINR changing value=site excursion
SINR coverage rate-site excursion after SINR coverage rate, wherein, the SINR before site excursion covers
SINR value total grid number front more than the grid number/skew of SINR thresholding before lid rate=site excursion,
After SINR coverage rate=site excursion after site excursion, SINR value is more than the grid number of SINR thresholding
Total grid number after/skew.
In the present embodiment, further after performing above-mentioned steps S108, it is also possible to output is used for referring to
Show and allow site excursion or forbid the Pre-Evaluation report of site excursion.
The base station site skew Pre-Evaluation method provided corresponding to above-described embodiment, the embodiment of the present invention also provides for
A kind of base station site skew Pre-Evaluation system, is used for performing above-mentioned base station site skew Pre-Evaluation method.Figure
2 is the structured flowchart of base station site skew Pre-Evaluation system according to embodiments of the present invention, as in figure 2 it is shown,
This base station site skew Pre-Evaluation system includes: acquisition module 10, simulation algorithm model 20, computing module
30, and determination module 40, wherein:
Acquisition module 10, for obtaining the site excursion relevant information of base station；
Simulation algorithm model 20, is used for using site excursion relevant information and standard propagation model, to for a long time
Evolution (LTE) network of network overlay area carries out rasterizing simulation calculation, obtains being made up of multiple grids
Zoning；
Computing module 30, for for the zoning before and after site excursion, calculates the reference of each grid
Signal receives power (RSRP) changing value and Signal to Interference plus Noise Ratio (SINR) changing value, each
Station spacing between the handling capacity changing value of community, and skew site and former site；
Determination module 40, is used for judging RSRP changing value, SINR changing value, handling capacity changing value, with
And station spacing is 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.
In the present embodiment, site excursion relevant information may include that network engineering parameter, electronic chart,
Antenna model data, and skew site information, wherein, skew site information is little before and after including site excursion
All engineering parameter information in district.
On the basis of the base station site shown in Fig. 2 offsets Pre-Evaluation system, the embodiment of the present invention additionally provides
A kind of preferably base station site skew Pre-Evaluation system.Fig. 3 is station, preferred base station according to embodiments of the present invention
The structured flowchart of location skew Pre-Evaluation system, as it is shown on figure 3, offset Pre-Evaluation system at preferred base station site
In:
Simulation algorithm model 20 may further include: delimit unit 22, for the former station with current base station
Location is the center of circle, delimits region of search using predetermined search value as search radius, and wherein, predetermined search value is equal to
The average station distance of LTE network is multiplied by pre-determined factor；Division unit 24, for being divided into region of search
Multiple sector regions with decile angle, for having the sector region of base station, determine that in region, distance is former
The boundary point that base station is zoning that site is nearest；Determine unit 26, for true according to multiple boundary points
Determine zoning.
Computing module 30 may further include:
First computing unit 32, is used for using below equation to calculate RSRP changing value: RSRP changing value=
The RSRP coverage rate after RSRP coverage rate-site excursion before site excursion, wherein, site excursion
Before before front RSRP coverage rate=site excursion, RSRP value is more than the grid number/skew of RSRP thresholding
Total grid number, after the RSRP coverage rate=site excursion after site excursion, RSRP value is more than RSRP
Total grid number after the grid number/skew of thresholding；
Second computing unit 34, is used for using below equation to calculate SINR changing value: SINR changing value=
The SINR coverage rate after SINR coverage rate-site excursion before site excursion, wherein, before site excursion
SINR coverage rate=site excursion SINR value more than before the front grid number/skew of SINR thresholding always
Grid number, after the SINR coverage rate=site excursion after site excursion, SINR value is more than SINR thresholding
Grid number/skew after total grid number.
Preferably, this preferred base station site skew Pre-Evaluation system can also include: output report module
50, for after obtaining the judged result of determination module 40, output be used for indicating permission site excursion or
Forbid the Pre-Evaluation report of site excursion.
For ease of understanding, the realization to above-described embodiment below in conjunction with Fig. 4 to Fig. 6 and preferred embodiment
Journey is further described in more detail.
Preferred embodiment
This preferred embodiment is mainly based upon the simulation result that wireless network covers, and builds from the angle of network structure
Whether vertical site excursion assessment algorithm model, with automatic decision network site excursion within tolerance interval.
Fig. 4 is the structural representation of site excursion Pre-Evaluation system according to the preferred embodiment of the invention, such as figure
Shown in 4, this site excursion Pre-Evaluation system includes: network and skew site message entry subsystem, covering
Simulation subsystem, site excursion evaluation subsystem and site excursion decision subsystem.
Based on this site excursion Pre-Evaluation system, the base station site skew Pre-Evaluation method that above-described embodiment provides
To implement process as follows:
First, in network and skew site message entry subsystem, network engineering parameter, electronic chart are inputted
With site excursion information, then by emulation of coverage capability subsystem, the overlay area of TD-LTE network is carried out grid
Change, generate each community RS-RSRP and RS-SINR at each grid.Then, site excursion assessment
Subsystem is between the RS-RSRP of relevant range before and after site excursion, RS-SINR, network throughput and station
Away from etc. carry out quantitative evaluation.Finally, site excursion decision subsystem quantizations various before and after site excursion are referred to
Mark (RSRP, SINR and network throughput etc.) is compared, and exports final result of determination.
1, network and the information input of skew site
Network engineering parameter, refer to table 1, and network engineering parameter specifically includes content as shown in table 1:
Table 1
Electronic chart, including landform (Height) information, landforms (Clutter) information, building (Building)
Information, Vector Message (Vector) etc..
Antenna model data, including the antenna gain on different level angles and vertical angle, can basis
Antenna type obtains from antenna producer.
Skew site information includes: all engineering parameters of the community before and after site excursion.
2, emulation of coverage capability
Based on the network information and skew site information, by the propagation model after correction to network coverage area
Territory carries out rasterizing emulation of coverage capability calculating, and before and after obtaining site excursion, each community is at each grid
RS-RSRP value and RS-SINR value.
(1) use standard SPM model calculating RSRP:
PL=K1+K2*lg (d)+K3*lg (Heff)+Kdiff*Diff_Loss+K4*lg (Heff) * lg (d)+
K5* (hm)+Clutter_Offset is wherein:
PL is path loss, and K1 is fixed loss, and K2 is and the factor of propagation distance linear correlation loss,
K3 is the factor of the propagation loss caused due to transmitter height, and Kdiff is the diffraction loss factor,
Diff_Loss is the diffraction loss factor (dB) caused due to barrier, K4 for consider firing altitude with away from
From the gain caused, usually negative value, when receiver is farther out and time transmitter is higher, it may be considered that loss subtracts
Few, K5 is receiver height factors, and d is the distance (unit: rice) between base station and mobile station, Heff
For base station effective depth (unit: rice), hm is mobile station height (unit: rice).
(2) use below equation calculating SINR:
SINR=Signal/ (Interference+Noise), wherein, S represents the merit measuring the useful signal arrived
Rate, the signal and the channel that are primarily upon include: RS (Reference Signal, reference signal), PDSCH
(Physical Downlink Shared Channel, Physical Downlink Shared Channel), I represents the letter that measurement is arrived
Number or the power of channel interference signal, including the interference of other communities in native system, and the interference of different system,
N represents low noise, relevant with the noise coefficient of concrete Measurement bandwidth and receiver.
3, site excursion assessment
Site excursion evaluation subsystem is to RS-RSRP, RS-SINR of network relevant range before and after site excursion
And downloading rate and station spacing etc. carry out quantitative evaluation, step is as follows:
(1) zoning is determined
As shown below, determine zoning according to following steps:
The first step, determines search radius, can determine according to the average station distance of network, such as with average station
1.5 times of spacing as search radius；
Second step, determines point angles such as 360 degree, take 60 degree as waiting point angle, according to decile
Principle is divided into A0 by around former site 360 degree, and A1, A2, A3, A4, A56 is respectively 60
The sector region of degree, (Fig. 5 is to determine search according to the preferred embodiment of the invention to be specifically referred to Fig. 5
The operation chart in region).
3rd step, determines A0, the calculating community in the subregion such as A1, A2, A3, A4, A5, according to
3 communities that the base station that in each region, the former site of distance is nearest covers are as calculating community, if waiting subregion
Community, not setup algorithm community, the most such subregion is not had in territory.
4th step, determines that zoning, zoning are that (each calculating community is included former site or skew
The community that site is corresponding) covering as master control (Ji Zhe community RSRP is maximum in place grid intermediate value) community
Cover region territory.
(2) assessment of RSRP variable quantity
The RSRP value of grids all in zoning is carried out statistical computation, as follows:
RSRP variable quantity=RSRP coverage rate (before skew)-RSRP coverage rate (after skew)=partially
Lead RSRP value is more than RSRP after always grid number-skew before the grid number/skew of RSRP thresholding
Value is total grid number more than after the grid number/skew of RSRP thresholding, in actual applications, and RSRP thresholding
Choose in advance and can have multiple choices, such as, in the preferred embodiment, preferably value is-100dB；
After obtaining RSRP variable quantity, need (the most above-mentioned with the change thresholding of RSRP set in advance
RSRP changing value threshold value in embodiment) contrast, if calculated RSRP variable quantity is
Change thresholding more than RSRP, then need to forbid carrying out site excursion.
(3) assessment of SINR variable quantity
The SINR value of grids all in zoning is carried out statistical computation, as follows:
SINR variable quantity=SINR coverage rate (before skew)-SINR coverage rate (after skew)=skew
Front SINR value is more than SINR value after total grid number-skew before after the grid number/skew of SINR thresholding
Total grid number more than after the grid number/skew of SINR thresholding, in actual applications, SINR thresholding
Choosing in advance and can have multiple choices, such as, in the preferred embodiment, preferably value is-3dB；
After obtaining SINR variable quantity, need (the most above-mentioned with the change thresholding of SINR set in advance
SINR changing value threshold value in embodiment) contrast, if calculated SINR variable quantity is
Change thresholding more than SINR, then need to forbid carrying out site excursion.
(4) assessment of handling capacity variable quantity
The first step: based on can the user of setting model automatically be distributed
RSRP value and the SINR value of each grid is drawn, according to RSRP and SINR by emulation of coverage capability
Grid defines preferably by the size of value, in, not good enough, be assigned randomly to meet phase according to Poisson distribution by UE
Answer on the grid of condition, and in the evaluation process before and after site offset, customer location be fixing,
Effectively judge the change of user throughput after website is before changing.Wherein, the process of definition grid is referred to figure
6 (Fig. 6 is the schematic diagram carrying out signal to noise ratio grade setting according to the preferred embodiment of the invention).
Wherein, Poisson distribution, wherein, and k=0,1,2 ..., n, can calculate from below equation
Obtain:
Wherein, e is the radix that natural logrithm is equal to 2.71828, and k is event
Number (probability therein is by the function given), K is the factorial of k, and λ is an arithmetic number, etc.
Expection number in the predetermined time interval occurred.
Second step: grid tells the calculating of the amount of gulping down
Use the following amount of gulping down computing formula of telling:
Throughput_dl=S* (NPDSCH*Mode*Rate)/length, wherein, S representation space multiplexing
The number of plies, NPDSCH represents the RE number that PDSCH takies, and Mode represents that modulation system, Rate represent
Code efficiency, Length represents the length of a radio frames, and the size of Mode and Rate depends on emulation knot
The interference level SINR value of fruit, can inquire about from table 2 and obtain, S and length is fixed value, NPDSCH
It can also be fixed value for concrete business.
Table 2
According to the SINR value of each grid, then tell before and after the amount of gulping down computing formula calculates skew according to above-mentioned
Each user tells the amount of gulping down size (i.e. handling capacity variable quantity)；
After obtaining telling the amount of gulping down variable quantity, need (the most above-mentioned with the change thresholding of handling capacity set in advance
Handling capacity changing value threshold value in embodiment) contrast, if calculated handling capacity variable quantity is
Exceed the change thresholding of handling capacity, then need to forbid carrying out site excursion.
(5) calculating of station spacing after site excursion
Calculate site and the station spacing of all communities in zoning after skew, as follows:
Station spacing=SQRT ((community A longitude-community B longitude) ^2+ of community A and community B
(community A latitude-community B latitude) ^2).
(6) calculating of site excursion amount
Calculate site and the station spacing of former site after skew, after obtaining station spacing, need and preset
The change thresholding (i.e. station spacing threshold value in above-described embodiment) of station spacing contrast, if calculated
To station spacing variable quantity already more than the change thresholding of station spacing, then need to forbid carrying out site excursion.
4, the judgement of site excursion
Each is calculated object (RSRP changing value, SINR changing value, handling capacity changing value by summary
And station spacing changing value) carry out the result that contrasts with corresponding change threshold, as long as there being an object to exceed
Changing value threshold value set in advance, all forbids carrying out site excursion, and the most all objects are without departing from change
Change value thresholding, just allows to carry out site excursion.In the preferred embodiment, the effect after site excursion
See, it is also possible to adopt in such a way: judge that whether the user's average throughput offseting in rear region is higher than partially
Lead, if it is, agree to skew, otherwise, disagrees skew, and exports analysis report and (refer to figure
7)。
By above preferred embodiment, following effect can be reached: (1) is passed through artificially to arrange assessment principle,
Utilize site offset to assess systematic analysis, instead of the method that personnel analyze site offset one by one, can be significantly
Reduce workload, improve work efficiency；(2) all of evaluation work is all carried out statistical analysis by simulation software,
Need not the simulation result before and after artificially drawing polygon and contrasting, unification is judged assessment by simulation software
As a result, and be given website before changing after the quantitative evaluation of network index done site by site, it is to avoid anthropic factor brings
Assessment difference；(3) existing site excursion appraisal procedure is mainly by covering before and after contrast site excursion
The result of emulation judges whether skew, and the application uses various dimensions to assess principle, except carrying out emulation of coverage capability
Also need to carry out business simulating.
The above is the preferred embodiment of the present invention, it is noted that for the ordinary skill people of this area
For Yuan, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications, this
Within a little improvements and modifications also should be considered to be encompassed in 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.
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