CN101150836B - Radio precise planning analog and testing system and method - Google Patents

Radio precise planning analog and testing system and method Download PDF

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CN101150836B
CN101150836B CN2007101350178A CN200710135017A CN101150836B CN 101150836 B CN101150836 B CN 101150836B CN 2007101350178 A CN2007101350178 A CN 2007101350178A CN 200710135017 A CN200710135017 A CN 200710135017A CN 101150836 B CN101150836 B CN 101150836B
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base station
district
sub
neighbor cell
telephone traffic
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CN101150836A (en
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王建
吴维宏
王鹰
许瑞华
顾一泓
阎凌清
王皆顺
冯晓冬
宗序梅
鲍一民
江振波
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China Mobile Group Jiangsu Co Ltd
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China Mobile Group Jiangsu Co Ltd
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Abstract

The invention provides a method for module measurement of a new station according to parameters of the actual position of planning station address, hanging height of antenna and transmitting power, etc., preestimating the signal covering condition and the traffic absorbing condition after the planning base station is started, providing reliable reference to benefit evaluation of the base station construction, through neighbouring area calcualtion and cell coverage calcualtion, planning a new station by traffic preestimation to reducce the blindness of planning base stations and improve the input-output ratio; or else, adjusting the station address of the planning base station according to the traffic preestimation.

Description

Radio precise planning analog and testing system and method
Technical field
The present invention relates to communication network wireless planning field, analyze the prediction of newly-built station being carried out sub-district covering and telephone traffic, thereby realize the planning of science activities of new website by the adjacent area.
Background technology
Increase day by day in Network fast development at present, base station construction scale, under the environment that network equipment investment increases thereupon, how to guarantee in planning in the early stage of base station construction, its maximum efficiency can both be brought into play in each planning site, prevent the phenomenon of " the big input; little output ", thereby further improve the returns of investment ratio of company, this needs network planning personnel to make the guiding plan scheme that accurate wireless network is built.
This radio precise planning analog and testing system can be hung high according to physical location, the antenna of planning site, gain and transmitting power and the every network datas such as MRR that totally collect within a certain period of time according to this inner rim existing network base station, zone, parameters such as disparate networks statistics such as the incoming level of for example TA of base station distribution, mobile phone and path loss are carried out mould to newly-built station and are surveyed, estimate signal coverage varies and the traffic carrying capacity absorbing state of planning base station construction after going into operation, for the assessment of base station construction benefit provides the scientific and reliable foundation; Otherwise can adjust the site of planning base station according to estimating traffic carrying capacity, make it give full play to usefulness, instruct addressing personnel's addressing work conscientiously.
A kind of radio precise planning analog and testing system, it comprises the adjacent area analysis module, the sub-district overlay module, telephone traffic is estimated module, described adjacent area analysis module is according to new website planned position and existing network base station data, automatically find out rational adjacent base station and switch the adjacent area, the algorithm of neighbor cell can effectively be rejected unnecessary peripheral base station, keeps the most effective adjacent base station and sub-district; The adjacent base station that described sub-district overlay module obtains according to the adjacent area analysis module, obtain the signal coverage areas of each relative neighbor cell in sub-district of this base station by Algorithm Analysis, and can be presented on the map by GIS, the sub-district covering algorithm can be effectively with the coverage of each sub-district, cell boarder is presented on the map as far as possible accurately, for engineering, and planning, network optimization, all kinds of personnel's references such as maintenance; Described telephone traffic is estimated the base station cell that module will newly drop into, estimate by algorithm and to obtain this new base station and how many telephone traffics the sub-district can absorb, the telephone traffic that absorbs is respectively from which sub-district, thereby obtain the carrier frequency that each sub-district of new website need dispose, finally disturb and pick out frequency automatically by frequency; Described telephone traffic is estimated module and can be comparatively accurately be opened each cell telephone traffic amount sharing condition of back to new website by algorithm and predict that new website is covered, and the validity that telephone traffic absorbs is assessed; System can also increase business hall automatic addressing module, draws the position that needs increase the business hall according to regional telephone traffic, provides foundation to market management.
This radio precise planning analog and testing system can import together to the newly-built base station of batch, analyze the prediction of carrying out sub-district covering and telephone traffic by the adjacent area, according to the parameters such as every line erl that can manually set, obtain the carrier frequency quantity of each sub-district, thus the frame type and the frame quantity of installing when obtaining each opening base station.
Beneficial effect of the present invention:
Radio precise planning analog and testing system method of the present invention has the following advantages:
Native system can carry out Pre-Evaluation to the site that engineering department finds, new website is carried out the adjacent area, cover the prediction of telephone traffic, carry out comprehensive assessment, as covering or telephone traffic absorbs the adjustable integral basis station location that does not reach requirement and reevaluates so that find more excellent planning site.
Along with carrying out of present engineering construction, it is long to be into tens of multiplications before the base station scale is compared, substantially about 1,000,000, the engineering of 300 base stations of first phase just needs the investment more than 300,000,000 in the investment of an average base station (comprising main equipment, corollary equipment, computer room construction finishing and iron tower construction).Can effectively guarantee the accuracy of base station selection by this system, for guarantee company reasonably invests the condition created.
This system is suitable for the planning addressing of network optimization simple base station equally, can be according to the planning analog and testing of science, select for use by wireless coverage schemes such as macrocell base stations or network optimization simple base stations and solve, can better initiatively reasonably plan by this system the zone that customer complaint is not arranged as yet, in time reasonably solve, really improve user satisfaction by all kinds of wireless coverage schemes.
Description of drawings
Fig. 1 is that the adjacent base station of the embodiment of the invention is judged schematic diagram;
Fig. 2 is the adjacent base station position view of the embodiment of the invention;
Fig. 3 is that the adjacent base station of the embodiment of the invention switches schematic diagram;
Fig. 4 is the telephone traffic predictive algorithm simulation drawing of the embodiment of the invention;
Fig. 5 is the adjacent area analysis process figure of the embodiment of the invention;
Fig. 6 is that the sub-district of the embodiment of the invention covers flow chart;
Fig. 7 estimates flow chart for the telephone traffic of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Radio precise planning analog and testing system of the present invention, specifically form by following three modules: the adjacent area analysis module, the sub-district overlay module, telephone traffic is estimated three modules of module and is formed.
One. the adjacent area analysis module
In fact the adjacent area is analyzed is exactly to find out nearest unique sub-district adjacent on the same direction, usually we can find out by naked eyes, but if realize then some difficulty with program, specifically adopt algorithm as follows, through actual test, consistent with our macroscopic result basically.
1. the judgement of neighbor cell
As shown in Figure 1: be provided with base station sequence (B1..Bm) and satisfy condition:
| B1B0|<| B2B0|<...<| Bm-1B0|<| BmB0|, ((i>j) is the base station in the sequence to Bj, and ∠ Bj B0 Bi>90 for 1≤j≤m), Bi.
If Bi is total satisfied for any Bj: (| BiB0|-|BjB0|)/| BiBj|≤d (0<d<1)
Then Bi is judged as the switching adjacent base station.
D in the above-mentioned dicision rules is the constant less than 1, and this paper is called adjacent nuisance parameter.As can be seen the left side of inequality be the triangle both sides poor (| BiB0|-|BjB0|) and the 3rd limit | the ratio of BiBj|, ratio have reacted the relative position (as shown in Figure 2) between Bi, B0, Bj, and when for example Bi, B0, Bj were on same straight line, ratio was 1.As seen the more little Bj of d to B0 ← → influence of switching between Bi is also just more little, condition is also harsh more, the adjacent base station quantity that obtains is also just few more.Like this, just can revise the adjacent base station set of selecting, make it more to meet our requirement by the value of adjusting d.General d gets between 0.6~0.8.
Determine that the concrete sub-district of switching generation need obtain by the position relation of line between the base station and sub-district, if line passes the sub-district, then switches and just takes place on this sub-district.For example: there are the switching neighbouring relations in a sector at the c sector at No. 1 station and No. 3 stations among Fig. 3, and the c sector at b sector and No. 2 stations and a sector at No. 4 stations exist switches neighbouring relations.
2. calculate the algorithm steps of neighbor cell:
To with the neighbor cell of calculation base station B0 the algorithm steps that example is listed concrete enforcement below.
The first step: the distance of calculating all base stations and base station B0
Second step: find out preceding n minimum base station of distance, and, obtain base station sequence (B1, B2 according to being sorted in the base station from small to large ... Bn), tabulate as candidate base station
The 3rd step: from the minimum base station B1 of distance, traversal is chosen Bi (i>1 and ∠ B1B0Bi<90 degree) from candidate list, if (| BiB0|-|B1B0|)/| BiB1|>d (d for default less than 1 number) then Bi is rejected from candidate list C.Carry out B2, B3 successively ... Bn, station list is chosen in final acquisition.
The 4th step: calculate and to choose the angle of arbitrary base station Bj in the tabulation with 0 direction of the line BjB0 of B0 and B0, and with the angle of 0 direction of Bj, determine the concrete sector that switches according to angular relationship, omni cell one is decided to be the switching neighbor cell.
At last: calculate the sector choose each base station Bj in the tabulation and B0 sector directions root BjB0 angle and whether be less than or equal to 180.Judge and disturb neighbor cell.Omni cell one is decided to be the interference neighbor cell.
3. program realization flow
See flow chart 5
Two. the sub-district overlay module
The sub-district covering analyzing is selected a certain base station, obtains the signal coverage areas of each relative neighbor cell in sub-district of this base station by Algorithm Analysis.
1. sub-district covering algorithm
A selected sub-district A0 to be analyzed obtains adjacent base station Ai (i>0).By sub-district A0 Ai is connected generation line segment Li respectively, by counterclockwise order Li is done perpendicular bisector, the face Ri that perpendicular bisector surrounds wherein is cell coverage area with the face that A0 intersects.
2. sub-district covering analyzing algorithm steps:
To be the algorithm steps that example is listed concrete enforcement with calculation base station A0 below.
The first step: the adjacent base station Ai (i>0) that calculates all A0.
Second step: with A0 is the center, and Ai by sorting counterclockwise, and is obtained the angle of Ai.
The 3rd step: the perpendicular bisector of being Li0.
The 4th step: calculate adjacent perpendicular bisector L (i, 0)-L (i+1,0) intersection point pi, obtain electricity collection Ps.
The 5th step: generate polygon POLYGON according to Ps.
The 6th step: polygonal each anchor ring is carried out intersecting calculating with A0, and the anchor ring that intersects both had been signal of base station overlay area Cell.
The 7th step: respectively angular bisector is done in each sub-district of A0, remove to cut apart base station signal overlay area Cell, promptly obtain the overlay area of this each sub-district, base station with these angular bisectors.
3. program realization flow
See flow chart 6
Three. telephone traffic is estimated module
It is base station cell with newly dropping into that telephone traffic is estimated, and estimates by algorithm and obtains this new base station and how many telephone traffics the sub-district can absorb, and the telephone traffic of absorption is respectively from which sub-district.
1. telephone traffic predictive algorithm
As shown in Figure 4, A is for newly adding the sub-district, and B is a neighbor cell.Extended line is done in a sub-district along A.Be different line segment d1 according to Passloss from 32-158, on extended line, obtain different points, point and the coordinate points of B sub-district linked to each other obtain different line segment d2, obtain the different passloss values of d2 correspondence according to the Mrr formula, with comparing of the passloss of the value of the passloss of d1 and d2, proportionally absorb the telephone traffic of neighbor cell.
2. calculate the algorithm steps of telephone traffic:
To be the algorithm steps that example is listed concrete enforcement with calculation base station A below.
The first step: calculate the neighbor cell of all A, following steps are done circulation at each neighbor cell.
Second step: the type according to the A sub-district obtains a lot of d1 values.
The 3rd step: obtain difference on the extended line of A sub-district according to the d1 value.
The 3rd step: the point that will obtain obtains different d2 with the connection of the neighbor cell left side.
The 4th step: obtain Passloss value and corresponding telephone traffic according to the neighbor cell type.
The 5th step: relatively obtain corresponding telephone traffic according to the passloss of d1 and the passloss of d2, rule relatively is from database
3. base station planning function algorithm:
● based on the MRR statistics of system;
● based on the CDD parameter of sub-district: mainly be transmitting power;
● based on the engineering parameter of sub-district: mainly be longitude and latitude, antenna height, antenna gain;
● based on the traffic volume measurement data of sub-district.
4. detailed algorithm:
1) radio transmission model:
Universal model:
(city) Lp=69.55+26.16*log (f)-13.82*log (H b)+(44.9-6.55*log (H b)) * log (d)-a (H m) a (Hm)=(1.1*log (f)-0.7) Hm-(1.56*log (f)-0.8)
(cities and towns) Lp=Lp-2* (log (f/28)) 2-5.4
(rural area) Lp=Lp-4.78*log (f) 2+ 18.33*log (f)-40.94
(Ericsson) Lp=A-13.82*log (H b)+(44.9-6.55log (H b)) * log (d)-a (H m) a (Hm)=3.2* (log (11.75*Hm)) 2-4.97
{ Lp is a path loss, and Hb is an antenna height, and Hm is mobile phone height (1.6m), and d is the air line distance of antenna for base station to antenna for mobile phone, and the unit of d is km, and H unit is m}
A (x) value is in the following several ways: x representative system type
A (900)=146.8, A (1800)=153.8 city (109,118)
A (900)=136.9, A (1800)=146.2 small towns (209,218)
A (900)=118.3, A (1800)=124.3 rural area (309,318)
2) Pathloss among the MRR
According to the pathloss value, divide 25%, 50%, 75%, and remaining proportion, carry out the fan-shaped demonstration of branch ratio and different colours in the drawings, because being theoretical space free, propagates this Pathloss, the interface of artificial correction need be provided, such as artificially add the value of 10-20 DB, calculate.
3) Rxlev among the MRR
Rxlev=BTSEirp-Lp
BTSEirp=BSPWRB-Lc-Lf+Ga
{ BSPWRB is a cell parameter, and Lc is mixer loss (4db), and Lf is feeder loss (3db), and Ga is the transmitting gain of antenna for base station }
Therefore, according to the formula of Lp and the formula of Rxlev, BTSEirp, can extrapolate the d value under the different distributions ratio Rxlev.
4) how to determine to get which A value
1. according to the TA mean value among the MRR, calculate average distance D, D=553.92*TA (unit is m) earlier;
2. according to the system type (900or1800) of this sub-district, get the A value respectively in three times (for example city, small towns, rural area), the D value substitution LP formula that will calculate by the A value calculates Rxlev value (three values are arranged) in conjunction with BTSErip after drawing the LP value again;
Three rxlev values that 3. will calculate average Rxlev value of this sub-district in MRR compares, and gets the Rxlev value (error is within 10%, on average about 5%) of error minimum, correspondingly determines to get which proper A value.
5) calculate the D value that different proportion distributes
According to getting fixed A value, can calculate the distribution proportion of different D values according to the Rxlev distribution proportion of MRR;
6) distribution of calculating ground distance
Ground distance=SQRT (D 2-(H b-H m) 2)
7) computing service distributes
According to the distribution proportion of ground distance and the traffic carrying capacity of this sub-district, can calculate service distribution situation apart from the base station different distance.(temporarily get four intervals: below the 60dbm, 61~70dbm, 71~80dbm is more than the 80dbm).8) GIS presents:
According to the antenna azimuth of sub-district and the lobe width of antenna, the sector region that draws, different intervals are represented with different colours).
5. program realization flow
See flow chart 7
Though the present invention with preferred embodiment openly as above; but they are not to be used for limiting the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the invention; from when can doing various variations or retouching, so being as the criterion of should being defined with the application's claim protection range of protection scope of the present invention.

Claims (2)

1. radio precise planning analog and testing system, it comprises the adjacent area analysis module, the sub-district overlay module, telephone traffic is estimated module, it is characterized in that:
Described adjacent area analysis module is found out rational adjacent base station automatically and is switched the adjacent area according to new website planned position and existing network base station data, and the algorithm of neighbor cell can effectively be rejected unnecessary peripheral base station, keeps the most effective adjacent base station and sub-district;
The adjacent base station that described sub-district overlay module obtains according to the adjacent area analysis module, obtain the signal coverage areas of each relative neighbor cell in sub-district of this base station by Algorithm Analysis, and can be presented on the map by GIS-Geographic Information System GIS, the sub-district covering algorithm can be effectively with the coverage of each sub-district, cell boarder is presented on the map as far as possible accurately, for engineering, and planning, all kinds of personnel's references are safeguarded in network optimization;
Described telephone traffic is estimated the base station cell that module will newly drop into, estimate by algorithm and to obtain this new base station and how many telephone traffics the sub-district can absorb, the telephone traffic that absorbs is respectively from which sub-district, thereby obtain the carrier frequency that each sub-district of new website need dispose, finally disturb and pick out frequency automatically by frequency;
Described telephone traffic is estimated module and can be comparatively accurately be opened each cell telephone traffic amount sharing condition of back to new website by algorithm and predict that new website is covered, and the validity that telephone traffic absorbs is assessed;
System also increases business hall automatic addressing module, draws the position that needs increase the business hall according to regional telephone traffic, provides foundation to market management.
2. radio precise planning analog and testing method, it comprises:
Determination step is analyzed in the adjacent area, finds out nearest unique sub-district adjacent on the same direction;
Sub-district covering analyzing step is selected a certain base station, obtains the signal coverage areas of each relative neighbor cell in sub-district of this base station by Algorithm Analysis;
Telephone traffic is estimated step, with the base station cell that newly drops into, estimates by algorithm and to obtain this new base station and how many telephone traffics the sub-district can absorb, and the telephone traffic of absorption is respectively from which sub-district;
It is characterized in that:
Determination step is analyzed in described adjacent area, specifically comprises:
The first step: the distance of calculating all base stations and base station B0;
Second step: find out preceding n minimum base station of distance, and according to being sorted in the base station from small to large, (B1 B2...Bn), tabulates as candidate base station to obtain the base station sequence;
The 3rd step: from the minimum base station B1 of distance, traversal is chosen Bi (i>1 and ∠ B1B0Bi<90 degree) from candidate list, if (| BiB0|-|B1B0|)/| BiB1|>d (d for default less than 1 number), then Bi is rejected from candidate list C, carry out B2 successively, B3...Bn, station list is chosen in final acquisition;
The 4th step: calculate and to choose the angle of arbitrary base station Bj in the tabulation with 0 direction of the line BjB0 of B0 and B0, and with the angle of 0 direction of Bj, determine the concrete sector that switches according to angular relationship, omni cell one is decided to be the switching neighbor cell;
The 5th step: calculate the angle of the sector choose each base station Bj in the tabulation and the sector directions root BjB0 of B0 and whether be less than or equal to 180, judgement interference neighbor cell, omni cell one is decided to be the interference neighbor cell;
Described sub-district covering analyzing step specifically comprises:
The first step: the adjacent base station Ai (i>0) that calculates all A0;
Second step: with A0 is the center, and Ai by sorting counterclockwise, and is obtained the angle of Ai;
The 3rd step: the perpendicular bisector of being Li0;
The 4th step: calculate adjacent perpendicular bisector L (i, 0)-L (i+1,0) intersection point pi, obtain electricity collection Ps;
The 5th step: generate polygon POLYGON according to Ps;
The 6th step: polygonal each anchor ring is carried out intersecting calculating with A0, and the anchor ring that intersects both had been signal of base station overlay area Cell;
The 7th step: respectively angular bisector is done in each sub-district of A0, remove to cut apart base station signal overlay area Cell, promptly obtain the overlay area of this each sub-district, base station with these angular bisectors;
Described telephone traffic is estimated step, specifically comprises:
The first step: calculate the neighbor cell of all A, following steps are done circulation at each neighbor cell;
Second step: according to the type of A sub-district obtain much newly adding sub-district A to neighbor cell apart from the d1 value;
The 3rd step: obtain difference on the extended line of A sub-district according to the d1 value;
The 4th step: the connection of the point that will obtain and the neighbor cell left side obtain different newly add sub-district A to neighbor cell apart from d2;
The 5th step: obtain path loss Passloss value and corresponding telephone traffic according to the neighbor cell type;
The 6th step:, proportionally absorb the telephone traffic of neighbor cell according to comparing of the path loss passloss of the value of the path loss passloss of d1 and d2.
CN2007101350178A 2007-11-06 2007-11-06 Radio precise planning analog and testing system and method Active CN101150836B (en)

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