CN101621817B - Method for determining deviation of azimuth angle of base station antenna - Google Patents

Method for determining deviation of azimuth angle of base station antenna Download PDF

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Publication number
CN101621817B
CN101621817B CN2009100897694A CN200910089769A CN101621817B CN 101621817 B CN101621817 B CN 101621817B CN 2009100897694 A CN2009100897694 A CN 2009100897694A CN 200910089769 A CN200910089769 A CN 200910089769A CN 101621817 B CN101621817 B CN 101621817B
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base station
sampled point
source cell
cell
origin
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CN101621817A (en
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兰丽娜
于翠波
张勖
勾学荣
毛京丽
张大伟
李巍
路宏琦
李大伟
于明凯
王栩楠
谢韫涵
柴莎莎
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Beijing Greennet Communications Technologies Co Ltd
Beijing University of Posts and Telecommunications
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Beijing Greennet Communications Technologies Co Ltd
Beijing University of Posts and Telecommunications
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Abstract

The invention discloses a method for determining deviation of an azimuth angle of a base station antenna. The method comprises the following steps: step A, original data required for determining the deviation of the azimuth angle of the base station antenna of a source cell is acquired and selected from a database of an operational and maintenance center OMC; and step B, the deviation of the azimuth angle of the base station antenna of the source cell is determined according to the acquired and selected original data. Based on the measured data of mobile terminals, whether the azimuth angle of the base station antenna deviates or not can be quickly judged by using the carrier-to-interference ratio and the distance relation of the source cell and the cells where all the mobile terminals are positioned, and the work load of measuring the azimuth angle of the antenna by a network maintainer can be greatly reduced at present; and meanwhile, a basis of network service quality degradation caused by quick positioning and azimuth angle deviation overcoming is provided for the network maintainer.

Description

A kind of method of definite deviation of azimuth angle of base station antenna
Technical field
The present invention relates to the antenna for base station technology in the mobile communication, be specifically related to a kind of method of definite deviation of azimuth angle of base station antenna.
Background technology
At present, in mobile communication system, transmitting and receiving of spacing wireless signal all relies on antenna to realize.Therefore, antenna plays a part very important for mobile communications network.In the parameters of configurating base station antenna, antenna azimuth is a very important ring.On the one hand, accurately the azimuth can guarantee the base station actual covering with desired identical, guarantee the running quality of whole network; On the other hand, suitable adjustment is carried out at the azimuth, can be optimized existing mobile communication network better according to the concrete condition that telephone traffic or network exist.But in the mobile communications network of reality, antenna azimuth is offset because of natural calamity such as high wind, earthquake sometimes, and this will cause mobile communication network quality to descend.
In order to determine because of natural calamity or azimuth angle deviation that other reasons took place, existing method is to adopt the mode of manual measurement, being survey crew utilizes antenna for base station azimuth test instrumentation to measure the azimuth of each cellular base stations antenna by walking, mode such as drive, and with the historical record comparison, determine antenna azimuth whether deviation and deviation what.The mobile network that this method spreads all over the sub-district and number is huge, expend time in consumes resources, labor intensive.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of definite deviation of azimuth angle of base station antenna, and this method can reduce the workload of determining deviation of azimuth angle of base station antenna.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of method of definite deviation of azimuth angle of base station antenna, described method comprises:
Steps A, from OMC operation and maintenance centre OMC database, gather and choose the required initial data of deviation of azimuth angle of base station antenna of determining the cell-of-origin; Wherein, described cell-of-origin is for determining the sub-district at the place, base station of antenna bearingt angular displacement;
Step B, determine the deviation of azimuth angle of base station antenna of cell-of-origin according to institute's initial data of gathering and choosing; Described initial data comprises: longitude and latitude, source cell base station antenna azimuth, each sampled point cell ID, the longitude and latitude of each sampled point base station and the carrier/interface ratio of each sampled point and cell-of-origin of cell-of-origin sign, source cell base station;
Wherein, described step B comprises:
Step B1, the initial data of gathering and choosing according to institute generate the required essential information of deviation of azimuth angle of base station antenna of determining the cell-of-origin;
Step B2, calculate the relative bearing of each sampled point base station and source cell base station according to the required essential information of the deviation of azimuth angle of base station antenna of above-mentioned definite cell-of-origin; Wherein, described sampled point base station is the base station of sampled point sub-district; Described sampled point sub-district be the sampled point place except the cell-of-origin and with other sub-districts the base station cell;
Step B3, the relative bearing of each sampled point base station and source cell base station is screened according to screening conditions;
The relative bearing of step B4, each sampled point base station that obtains according to screening and source cell base station obtains the antenna for base station azimuth of cell-of-origin;
Step B6, calculate the deviation of azimuth angle of base station antenna that obtains the cell-of-origin according to the antenna for base station azimuth of described cell-of-origin.
After step B, this method further comprises:
Step C, judge whether the azimuth angle deviation of source cell base station antenna has surpassed predetermined threshold value, if, execution in step D, if not, process ends;
Step D, in system, show the azimuthal deviation information of antenna for base station of cell-of-origin.
Between step B4 and step B6, this method further comprises:
Step B5, judged whether to reach predetermined screening number of times, if, execution in step B6, if not, execution in step B3.
Base station with the cell-of-origin is the center, and the due east direction is an x axle positive direction, and direct north is a y axle positive direction, sets up plane right-angle coordinate, and described step B1 comprises:
Step B11, determine each residing position in the plane right-angle coordinate of being set up, sampled point base station according to institute's initial data of gathering and choosing;
Step B12, calculate distance between each sampled point base station and source cell base station according to institute's initial data of gathering and choosing;
Step B13, calculate the longitude distance of each sampled point base station and source cell base station according to institute's initial data of gathering and choosing.
The method of determining each residing position in the plane right-angle coordinate of being set up, sampled point base station among the described step B11 is specially:
1) when the sampled point base station latitude greater than source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System, the position at this place, sampled point base station is the first quartile in the plane right-angle coordinate of being set up;
2) when the sampled point base station latitude greater than source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System, the position at this place, sampled point base station is second quadrant in the plane right-angle coordinate of being set up;
3) when the sampled point base station latitude less than source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System, the position at this place, sampled point base station is the third quadrant in the plane right-angle coordinate of being set up;
4) when the sampled point base station latitude less than source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System, the position at this place, sampled point base station is the four-quadrant in the plane right-angle coordinate of being set up;
5) equal source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System when the sampled point base station latitude, the position at this place, sampled point base station is the x axle positive axis of set up in the plane right-angle coordinate;
6) equal source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System when the sampled point base station latitude, the position at this place, sampled point base station is the negative semiaxis of the x axle in the plane right-angle coordinate of being set up;
7) equal the source cell base station Longitude In System greater than source cell base station latitude and this sampled point base station longitude when the sampled point base station latitude, the position at this place, sampled point base station is the y axle positive axis in the plane right-angle coordinate of being set up;
8) equal the source cell base station Longitude In System less than source cell base station latitude and this sampled point base station longitude when the sampled point base station latitude, the position at this place, sampled point base station is the negative semiaxis of the y axle in the plane right-angle coordinate of being set up.
In described step B12,
The formula of distance is between each sampled point base station of described calculating and source cell base station:
D 1＝R×arccos[cosb×cosy×cos(a-x)+sin?b×sin?y]×π/180
Wherein, D 1Represent distance between each sampled point base station and source cell base station, R is an earth radius, and x, y represent the longitude and the latitude of sampled point base station respectively; A, b represent the longitude and the latitude of source cell base station respectively.
In described step B13,
The formula of the longitude distance of each sampled point base station of described calculating and source cell base station is:
L 1＝R×arccos[cos 2?b×cos(a-x)+sin 2?b]×π/180
Wherein, L 1Represent the longitude distance of each sampled point base station and source cell base station, R is an earth radius, and x represents the longitude of sampled point base station; A, b represent the longitude and the latitude of source cell base station respectively.
Base station with the cell-of-origin is the center, and the due east direction is an x axle positive direction, and direct north is a y axle positive direction, sets up plane right-angle coordinate, and the method for calculating the relative bearing of each sampled point base station and source cell base station among the described step B2 is specially:
(1) when described sampled point base station is positioned at the first quartile of the plane right-angle coordinate of being set up: TD 1=90 °-arccos (L 1/ D 1);
(2) when described sampled point base station is positioned at second quadrant of the plane right-angle coordinate of being set up: TD 1=270 °+arccos (L 1/ D 1);
(3) when described sampled point base station is positioned at the third quadrant of the plane right-angle coordinate of being set up: TD 1=270 °-arccos (L 1/ D 1);
(4) when described sampled point base station is positioned at the four-quadrant of the plane right-angle coordinate of being set up: TD 1=90 °+arccos (L 1/ D 1);
(5) when described sampled point base station is positioned at the x axle positive axis of the plane right-angle coordinate of being set up, TD 1=90 °;
(6) when described sampled point base station is positioned at the negative semiaxis of the x axle of the plane right-angle coordinate of being set up, TD 1=270 °;
(7) when described sampled point base station is positioned at the y axle positive axis of the plane right-angle coordinate of being set up, TD 1=0 °;
(8) when described sampled point base station is positioned at the negative semiaxis of the y axle of the plane right-angle coordinate of being set up, TD 1=180 °;
Wherein, TD 1Represent the relative bearing of each sampled point base station and source cell base station; L 1Represent the longitude distance of each sampled point base station and source cell base station; D 1Represent distance between each sampled point base station and source cell base station.
According to screening conditions the relative bearing of each sampled point base station and source cell base station is screened among the described step B3 and comprises:
Step B31, the relative bearing of each sampled point base station and source cell base station is screened according to the carrier/interface ratio screening conditions;
Step B32, the relative bearing of each sampled point base station and source cell base station is screened according to the distance screening conditions.
The azimuthal method of antenna for base station that each sampled point base station that obtains according to screening among the described step B4 and the relative bearing of source cell base station obtain the cell-of-origin is specially:
Mean value computation is carried out in each sampled point base station of each sampled point correspondence of satisfying distance and carrier/interface ratio screening conditions simultaneously and the relative bearing of source cell base station, thereby obtain the antenna for base station azimuth of described cell-of-origin.
The method of calculating the deviation of azimuth angle of base station antenna that obtains the cell-of-origin according to the antenna for base station azimuth of described cell-of-origin among the described step B6 is specially:
Mean value computation is carried out at one or more antenna for base station azimuth to the cell-of-origin, thereby obtains the antenna for base station azimuth calculating value of cell-of-origin; The difference of the antenna for base station azimuth original value of the antenna for base station azimuth calculating value of described cell-of-origin and the cell-of-origin of gathering from the OMC database is the deviation of azimuth angle of base station antenna of described cell-of-origin.
Described system is GIS-Geographic Information System GIS.
As seen from the above technical solutions, the present invention is based on the portable terminal measured data, utilize the carrier/interface ratio and the distance relation of cell-of-origin and sub-district, portable terminal place can determine fast whether the antenna for base station azimuth of cell-of-origin deviation takes place, and can reduce the workload that the existing network attendant measures antenna azimuth greatly; Simultaneously, also provide foundation for the network service quality decline that the network maintenance staff locatees fast and the solution azimuth angle deviation causes.
Description of drawings
Fig. 1 is a method flow diagram of determining the deviation of azimuth angle of base station antenna of cell-of-origin in the one embodiment of the invention;
Fig. 2 is the schematic diagram of the plane right-angle coordinate set up in the one embodiment of the invention;
Fig. 3 determines the method flow diagram of the deviation of azimuth angle of base station antenna of cell-of-origin for the initial data of gathering and choosing according to institute in the one embodiment of the invention;
The method flow diagram of the essential information that the deviation of azimuth angle of base station antenna that Fig. 4 determines the cell-of-origin for the initial data of gathering and choosing according to institute in the one embodiment of the invention generates is required;
Fig. 5 carries out method for screening flow chart according to screening conditions to the relative bearing of each sampled point base station and source cell base station in the one embodiment of the invention;
Fig. 6 is a method flow diagram of determining the deviation of azimuth angle of base station antenna of cell-of-origin in the another embodiment of the present invention.
Embodiment
For make purpose of the present invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Main thought of the present invention is: gather and choose the required initial data of deviation of azimuth angle of base station antenna of determining the cell-of-origin from OMC operation and maintenance centre (OMC) database, deviation of azimuth angle of base station antenna according to carrier/interface ratio between the cell-of-origin of being gathered and each sampled point sub-district and the definite cell-of-origin of relation, the position between each sampled point base station and source cell base station, if the deviation greater than predetermined threshold value appears in the antenna for base station azimuth of cell-of-origin, then in system, show corresponding azimuth angle deviation information.
Fig. 1 is a method flow diagram of determining the deviation of azimuth angle of base station antenna of cell-of-origin in the one embodiment of the invention.As shown in Figure 1, the method for the invention mainly may further comprise the steps:
Steps A, from the OMC database, gather and choose the required initial data of deviation of azimuth angle of base station antenna of determining the cell-of-origin.
At mobile communications network, in global system for mobile communications (GSM) network, because the needs of various mobile communication businesses or the demand of network side (such as, the sub-district gravity treatment), portable terminal in each sub-district (for example, mobile phone) at set intervals (such as, 580 milliseconds) all can be (for example with some measurement data of its current position, Serving cell sign (Serving Sector ID), the descending level of Serving cell, each interfered cell sign (Interfering Sector ID), each interfered cell downlink electrical equality) be uploaded to the network side of this mobile communications network, these measurement data that network side is uploaded each portable terminal again are kept in the OMC database of this mobile communication system accordingly with for example form of record, therefore in an OMC database of this mobile communications network, generally all store in the certain hour section (such as, one month) portable terminal is uploaded in each sub-district in certain zone of being covered by this mobile communications network (such as, districts and cities) measurement data; Simultaneously, also storing the configuration information of each sub-district in the described zone that this mobile communications network covers in the described OMC database with for example form of record, the for example longitude and latitude of each cell ID, each cell base station and antenna azimuth etc., and the network side of this mobile communications network, for example base station controller (BSC) measurement data that each portable terminal is uploaded is carried out other related data after the respective handling.For example, the Serving cell of each portable terminal that network side can calculate according to the measurement data that each portable terminal is uploaded and the carrier/interface ratio between each interfered cell, and the Serving cell of above-mentioned each portable terminal and the carrier/interface ratio between each interfered cell are stored in the record of corresponding Serving cell and each interfered cell in the described OMC database.
In an embodiment of the present invention, for the convenience of narrating, certain zone that described mobile communications network can be covered (such as, districts and cities) portable terminal of uploading measurement data in is called sampled point, a sub-district at the place, base station of required definite antenna bearingt angular displacement in this zone is called the cell-of-origin, sampled point place in this zone is called the sampled point sub-district except the cell-of-origin and with other sub-districts the base station cell.The base station of sampled point sub-district is called the sampled point base station.Therefore, in this step, can from above-mentioned OMC database, gather in a period of time all data of (such as among one day when busy) required analyzed area, and therefrom choose the required initial data of deviation of azimuth angle of base station antenna of determining the cell-of-origin, choose in all data that can from above-mentioned OMC database, gather interfered cell be designated the measurement data that cell-of-origin and Serving cell sign is not the same base station cell of cell-of-origin (such as, the cell-of-origin sign, the descending level of cell-of-origin, the downlink electrical equality of the sign of a plurality of sampled points sub-district and a plurality of sampled points sub-district), and according to cell-of-origin sign and described a plurality of sampled point cell ID from described OMC database, inquire about the configuration information that obtains cell-of-origin and described a plurality of sampled points sub-district (such as, the longitude and latitude of source cell base station and azimuth, the longitude and latitude of described a plurality of sampled points base station and azimuth etc.), choose the sampled point sub-district that calculates according to described a plurality of sampled point cell downlink level and the descending level in cell-of-origin and the carrier/interface ratio of cell-of-origin simultaneously in the data that also can from the OMC database, gather.
Wherein, the carrier/interface ratio of described sampled point sub-district and cell-of-origin is: at the descending level of this sampled point sub-district that certain sampled point (being certain portable terminal of uploading measurement data) is located to upload and the ratio of the descending level in cell-of-origin that this sample point is uploaded.For example, the descending level (i.e. the descending level of this sampled point O this sampled point sub-district of uploading) that is located at this sampled point sub-district that sampled point O place receives in certain sampled point sub-district is A, be B and receive the descending level in cell-of-origin (i.e. this sampled point O upload the descending level in cell-of-origin) at this sampled point O place, then the carrier/interface ratio of this sampled point sub-district and cell-of-origin is A/B.
In an embodiment of the present invention, the required initial data of deviation of azimuth angle of base station antenna of described definite cell-of-origin of gathering from the OMC database and choosing can comprise: the cell-of-origin (for example identifies, the title of cell-of-origin), the longitude and latitude of source cell base station, source cell base station antenna azimuth (being the antenna for base station azimuth original value of cell-of-origin), each sampled point cell ID (for example, the title of each sampled point sub-district), the longitude and latitude of each sampled point base station and the carrier/interface ratio of each sampled point sub-district and cell-of-origin.
Because the total quantity of the sampled point in the zone of required analysis is generally all bigger, and the also more realistic applied environment of the distribution of sampled point (for example, the quantity of the sampled point of personnel's close quarters is more, and the negligible amounts of the sampled point in the sparse zone of personnel etc.), simultaneously, the measurement data that each sampled point is uploaded also is real-time measurement data, therefore, the above-mentioned initial data of gathering and choosing from the OMC database can be reacted the signal level distribution situation of each position in the zone of required analysis preferably.
In order to get rid of the decoding error that may exist in above-mentioned the initial data of gathering and choosing, the initial data that can also further gather and choose institute is carried out preliminary treatment, described preliminary treatment can be for going unusual preliminary treatment, for example, remove above-mentioned null value or the mess code data in the initial data of gathering and choosing.
Step B, determine the deviation of azimuth angle of base station antenna of cell-of-origin according to institute's initial data of gathering and choosing.
For the convenience of narrating, in an embodiment of the present invention, will with the base station of cell-of-origin the center, due east (longitude) direction is an x axle positive direction, positive north (latitude) direction is a y axle positive direction, sets up plane right-angle coordinate as shown in Figure 2.As shown in Figure 2, antenna azimuth is meant by direct north (being the y axle positive direction in the above-mentioned plane right-angle coordinate) and is rotated in a clockwise direction the formed horizontal sextant angle of antenna direction that span is 0-360 °; Relative bearing is meant by direct north (being the y axle positive direction in the above-mentioned plane right-angle coordinate) and (for example is rotated in a clockwise direction certain sampled point base station, formed horizontal sextant angle during sampled point base station 1) with the line direction of this source cell base station, span is 0-360 °.
In this step, can be (for example according to an initial data of gathering and choosing, the longitude and latitude of the longitude and latitude of source cell base station and each sampled point base station) generates the required essential information of deviation of azimuth angle of base station antenna of determining the cell-of-origin respectively, and calculate the relative bearing of each sampled point base station and source cell base station according to the required essential information of the deviation of azimuth angle of base station antenna of above-mentioned definite cell-of-origin, according to screening conditions each sampled point base station that calculates and the relative bearing of source cell base station are screened again, obtain the antenna for base station azimuth of cell-of-origin then according to the relative bearing of each sampled point base station after the screening and source cell base station, calculate the deviation of azimuth angle of base station antenna that obtains the cell-of-origin according to the antenna for base station azimuth of described cell-of-origin at last.
Fig. 3 determines the method flow diagram of the deviation of azimuth angle of base station antenna of cell-of-origin for the initial data of gathering and choosing according to institute in the one embodiment of the invention.As shown in Figure 3, described method mainly may further comprise the steps:
Step B1, the initial data of gathering and choosing according to institute generate the required essential information of deviation of azimuth angle of base station antenna of determining the cell-of-origin.
In an embodiment of the present invention, because the initial data of gathering and choosing is the data of a plurality of sampled points, therefore, must generate the required essential information of deviation of azimuth angle of base station antenna of determining the cell-of-origin according to an initial data of each sampled point of gathering and choosing.Therefore, in following description to step B1, B2, we will be with the initial data of a sampled point, for example, the initial data of the sampled point 1 among Fig. 2 among the sampled point 1-4 is an example, introduces the basic skills that the initial data of gathering and choosing according to institute generates the required essential information of the deviation of azimuth angle of base station antenna of definite cell-of-origin.For other the initial data of institute's sampled point of gathering and choosing, also can handle according to identical method.
In an embodiment of the present invention, when the initial data of sampled point 1 is handled, can use parameter D 1The sampled point base station 1 at expression sampled point 1 place and the distance between this source cell base station are used parameter L 1Represent that the longitude distance between sampled point base station 1 and this source cell base station (is the distance D between above-mentioned sampled point base station 1 and the source cell base station 1Spherical projection distance on the latitude line of the earth, calculate this longitude apart from the time, can suppose that described sampled point base station 1 is identical with the latitude of source cell base station), use parameter W 1Latitude distance between expression sampled point base station 1 and this source cell base station (is the distance D between above-mentioned sampled point base station 1 and the source cell base station 1Spherical projection distance on the meridian of the earth, calculate this latitude apart from the time, can suppose that described sampled point base station 1 is identical with the longitude of source cell base station), use TD 1Relative bearing between expression sampled point base station 1 and this source cell base station; Simultaneously, can also use Q 1The information of residing position in above-mentioned plane right-angle coordinate, expression sampled point base station 1 for example, is worked as Q 1=2 o'clock, represent that then sampled point base station 1 is arranged in the 2nd quadrant of above-mentioned plane right-angle coordinate, and work as Q 1=1.5 o'clock, represent that then sampled point base station 1 is arranged on the y axle positive axis of above-mentioned plane right-angle coordinate, or the like, and the rest may be inferred; In addition, in an embodiment of the present invention, can also be according to actual conditions to above-mentioned Q 1Value and the setting that is different from foregoing description of the concrete implication of each value.
In technical scheme of the present invention, can have several different methods to determine the deviation of azimuth angle of base station antenna of cell-of-origin, and when using diverse ways, required essential information can be different.Therefore, can generate required essential information according to the method for the deviation of azimuth angle of base station antenna of employed concrete definite cell-of-origin and the initial data that institute gathers and chooses.
Easy for what narrate, in following specific embodiment, will be example with a kind of method of deviation of azimuth angle of base station antenna of concrete definite cell-of-origin, technical scheme of the present invention is described in detail.In the method, because at known parameters D 1, L 1Or W 1In any two parameters the time, can directly know the 3rd parameter by inference according to two known parameters, therefore in an embodiment of the present invention, the required essential information of the deviation of azimuth angle of base station antenna of above-mentioned definite cell-of-origin comprises: above-mentioned parameter D 1, L 1Or W 1In any two kinds of parameters; Further, above-mentioned required essential information can also comprise parameter Q 1Below, will comprise D with required essential information 1, L 1And Q 1Be example, technical scheme of the present invention is described in detail.
The method flow diagram of the essential information that the deviation of azimuth angle of base station antenna that Fig. 4 determines the cell-of-origin for the initial data of gathering and choosing according to institute in the one embodiment of the invention generates is required.Referring to Fig. 4, said method comprising the steps of:
For the convenience of narrating, in each following step, all will serve as that the initial data that institute gathers and chooses is that example describes with the initial data of the sampled point 1 among the sampled point 1-4 shown in above-mentioned Fig. 2, for other the initial data of institute's sampled point of gathering and choosing, also can handle accordingly according to identical method.
Step B11, determine each residing position in the plane right-angle coordinate of being set up, sampled point base station according to institute's initial data of gathering and choosing.
Owing to comprise the longitude and latitude of each sampled point base station in the initial data that above-mentioned is gathered and choose, therefore can be according to above-mentioned the initial data of gathering and choosing and the longitude and latitude of source cell base station, and according to the plane right-angle coordinate of being set up, determine each residing position in the plane right-angle coordinate of being set up, sampled point base station, concrete execution mode is:
1) when sampled point base station 1 latitude greater than source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System, the position at this place, sampled point base station is the first quartile in the plane right-angle coordinate of being set up, i.e. Q 1=1;
2) when sampled point base station 1 latitude greater than source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System, the position at this place, sampled point base station is second quadrant in the plane right-angle coordinate of being set up, i.e. Q 1=2;
3) when sampled point base station 1 latitude less than source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System, the position at this place, sampled point base station is the third quadrant in the plane right-angle coordinate of being set up, i.e. Q 1=3;
4) when sampled point base station 1 latitude less than source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System, the position at this place, sampled point base station is the four-quadrant in the plane right-angle coordinate of being set up, i.e. Q 1=4;
5) equal source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System when sampled point base station 1 latitude, the position at this place, sampled point base station is the x axle positive axis in the plane right-angle coordinate of being set up, i.e. Q 1=4.5;
6) equal source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System when sampled point base station 1 latitude, the position at this place, sampled point base station is negative semiaxis, i.e. Q of the x axle in the plane right-angle coordinate of being set up 1=2.5;
7) equal the source cell base station Longitude In System greater than source cell base station latitude and this sampled point base station longitude when sampled point base station 1 latitude, the position at this place, sampled point base station is the y axle positive axis in the plane right-angle coordinate of being set up, i.e. Q 1=1.5;
8) equal the source cell base station Longitude In System less than source cell base station latitude and this sampled point base station longitude when the sampled point base station latitude, the position at this place, sampled point base station is negative semiaxis, i.e. Q of the y axle in the plane right-angle coordinate of being set up 1=3.5.
Can determine each position in the plane right-angle coordinate of being set up, sampled point base station one by one according to above-mentioned method.When determine each position in the plane right-angle coordinate of being set up, sampled point base station according to said method after, the information of the position at above-mentioned each place, sampled point base station can be added in the record of corresponding sampled point with the form of for example field.Because a plurality of sampled points, such as, the sampled point 1-4 among Fig. 2, initial data in comprise identical sampled point latitude and longitude of base station information, so will comprise the information of the position at identical place, sampled point base station in the record of described a plurality of sampled points.
Step B12, calculate distance between each sampled point base station and source cell base station according to institute's initial data of gathering and choosing.
Owing to comprise the longitude and latitude of each sampled point base station in the initial data that above-mentioned is gathered and choose, therefore the initial data that can gather and choose according to above-mentioned institute and the longitude and latitude of source cell base station, and utilize that the range formula of point-to-point transmission calculates distance between described each sampled point base station and source cell base station on the earth.Calculate for convenience, suppose that the earth is a standard ball, radius is R, then any 2 A on the earth (x, y) and B (a, b) the spherical distance D between AbAs following formula 1) shown in:
D ab＝R×arccos[cosb×cosy×cos(a-x)+sinb×siny]×π/180 1)
Above-mentioned formula 1) in, D AbUnit be the kilometer, R is earth radius (generally getting 6370 kilometers), x and a are longitude, y and b are latitude value, wherein east longitude get on the occasion of, west longitude is got negative value, north latitude get on the occasion of, south latitude is got negative value, such as, 30 ° of east longitudes, value are 30 °, 50 ° in west longitude, and value is-50 °;
In this step, 2 of available A, B represent sampled point base station 1 and source cell base station respectively, and promptly x, y represent the longitude and the latitude of above-mentioned sampled point base station 1 respectively; A, b represent the longitude and the latitude of source cell base station respectively; Between then described sampled point base station 1 and source cell base station apart from D 1Can be according to following formula 2) calculate:
D 1＝R×arccos[cosb×cosy×cos(a-x)+sinb×siny]×π/180 2)
Above-mentioned formula 2) in, D 1Unit be the kilometer, R is earth radius (generally getting 6370 kilometers).
Can determine the distance between each sampled point base station and the source cell base station one by one according to above-mentioned method.When according to above-mentioned formula 2) calculate respectively between each sampled point base station and source cell base station after the distance, distance between above-mentioned each sampled point base station and source cell base station can be added in the record of corresponding sampled point with the form of for example field.Because a plurality of sampled points, such as, the sampled point 1-4 among Fig. 2, initial data in comprise identical sampled point latitude and longitude of base station information, so will comprise identical sampled point base station and the range information between source cell base station in the record of described a plurality of sampled points.
Step B13, calculate the longitude distance of each sampled point base station and source cell base station according to institute's initial data of gathering and choosing.
Owing to comprise the longitude and latitude of each sampled point base station in the initial data that above-mentioned is gathered and choose, therefore the initial data that can gather and choose according to above-mentioned institute and the longitude and latitude of source cell base station, and utilize the range formula of point-to-point transmission on the earth to calculate the longitude distance of described each sampled point base station and source cell base station.So at formula 1) in, 2 of available A, B represent sampled point base station 1 and source cell base station respectively, and promptly x, y represent the longitude and the latitude of above-mentioned sampled point base station 1 respectively; A, b represent the longitude and the latitude of source cell base station respectively; Because what calculated is the longitude distance L 1, the distance D between promptly above-mentioned sampled point base station 1 and the source cell base station 1Spherical projection distance on the latitude line of the earth, therefore calculate above-mentioned longitude apart from the time, can suppose that the latitude of above-mentioned sampled point base station 1 and source cell base station is identical, that is, y can represent with b, the longitude distance L of then described sampled point base station 1 and source cell base station 1Can be according to following formula 3) calculate:
L 1＝R×arccos[cos 2b×cos(a-x)+sin 2b]×π/180 3)
Above-mentioned formula 3) in, L 1Unit be the kilometer, R is earth radius (generally getting 6370 kilometers).
Can determine the longitude distance between each sampled point base station and the source cell base station one by one according to above-mentioned method.After the longitude distance that calculates according to above-mentioned method between each sampled point base station and source cell base station, the distance of the longitude between each sampled point base station and source cell base station can be added in the record of corresponding sampled point with the form of for example field.Because a plurality of sampled points, such as, the sampled point 1-4 among Fig. 2, initial data in comprise identical sampled point latitude and longitude of base station information, so will comprise identical sampled point base station and the longitude range information between source cell base station in the record of described a plurality of sampled points.
In addition, do not have strict execution sequence between above-mentioned steps B11～B13, can carry out simultaneously, can carry out according to the sequencing that sets in advance according to actual needs yet; And in the required essential information of the deviation of azimuth angle of base station antenna of above-mentioned definite cell-of-origin, do not comprise Q 1The time, above-mentioned steps B11 can omit.
In addition, describe the longitude distance L in the above embodiments in detail 1Computational methods, by that analogy, when the longitude of hypothesis above-mentioned sampled point base station 1 and source cell base station is identical, can be according to formula 2) the latitude distance W of calculating sampling point base stations 1 and source cell base station 1, do not repeat them here.Simultaneously, because in the ideal case, the length of all warps equates on the earth, therefore, in an embodiment of the present invention, also can directly obtain above-mentioned latitude distance W according to the difference of the latitude between sampled point base station 1 and the source cell base station 1, concrete computational methods also repeat no more at this.
Step B2, calculate the relative bearing of each sampled point base station and source cell base station according to the required essential information of the deviation of azimuth angle of base station antenna of above-mentioned definite cell-of-origin.
In this step, can obtain the relative bearing of each sampled point base station and source cell base station according to the required essential information of deviation of azimuth angle of base station antenna of the definite cell-of-origin that is generated among the above-mentioned steps B1.Below, will be D with required essential information 1, L 1And Q 1Be example, technical scheme of the present invention is described in detail, specifically, the relative bearing TD between described sampled point base station 1 and the source cell base station 1Computational methods be:
(1) works as Q 1=1, when promptly described sampled point base station 1 is positioned at the first quartile of the plane right-angle coordinate of being set up: TD 1=90 °-arccos (L 1/ D 1);
(2) work as Q 1=2, when promptly described sampled point base station 1 is positioned at second quadrant of the plane right-angle coordinate of being set up: TD 1=270 °+arccos (L 1/ D 1);
(3) work as Q 1=3, when promptly described sampled point base station 1 is positioned at the third quadrant of the plane right-angle coordinate of being set up: TD 1=270 °-arccos (L 1/ D 1);
(4) work as Q 1=4, when promptly described sampled point base station 1 is positioned at the four-quadrant of the plane right-angle coordinate of being set up: TD 1=90 °+arccos (L 1/ D 1);
(5) work as Q 1=4.5, when promptly described sampled point base station 1 is positioned at the x axle positive axis of the plane right-angle coordinate of being set up, described TD 1=90 °;
(6) work as Q 1=2.5, when promptly described sampled point base station 1 is positioned at the negative semiaxis of the x axle of the plane right-angle coordinate of being set up, described TD 1=270 °;
(7) work as Q 1=1.5, when promptly described sampled point base station 1 is positioned at the y axle positive axis of the plane right-angle coordinate of being set up, described TD 1=0 °;
(8) work as Q 1=3.5, when promptly described sampled point base station 1 is positioned at the negative semiaxis of the y axle of the plane right-angle coordinate of being set up, described TD 1=180 °.
Can determine the relative bearing between each sampled point base station and this source cell base station one by one according to above-mentioned method.After calculating the relative bearing of each sampled point base station and source cell base station, the relative bearing of each sampled point base station and source cell base station can be added in the record of corresponding sampled point with the form of for example field according to the required essential information of the deviation of azimuth angle of base station antenna of above-mentioned definite cell-of-origin.Because a plurality of sampled points, such as, sampled point 1-4 among Fig. 2, comprise range information and identical sampled point base station and the longitude range information between source cell base station between the information of the position at identical place, sampled point base station, identical sampled point base station and source cell base station in the record, so will comprise the identical sampled point base station and the relative bearing angle information of source cell base station in the record of described a plurality of sampled points.
In addition, in this step, if do not comprise Q in the above-mentioned required essential information 1, then can judge that directly described sampled point base station 1 is positioned at the particular location of the plane right-angle coordinate of being set up, and, calculate corresponding TD according to the longitude and latitude of described sampled point base station 1 and the longitude and latitude of cell-of-origin according to 8 kinds of above-mentioned situations 1
Step B3, the relative bearing of each sampled point base station and source cell base station is screened according to screening conditions.
In this step, each sampled point base station that will obtain step B2 according to screening conditions and the relative bearing of source cell base station are screened, and purpose is to get rid of to the useless or disadvantageous relative bearing of follow-up calculating.Because the relative bearing of above-mentioned each sampled point base station and source cell base station is all corresponding to each sampled point, thus above-mentioned according to screening conditions to the screening of the relative bearing of each sampled point base station and source cell base station also can regard as to the screening of the corresponding sampled point of relative bearing of above-mentioned each sampled point base station and source cell base station.
In an embodiment of the present invention, can corresponding one or more screening conditions be set according to concrete applicable cases.For example, in the present embodiment, described screening conditions can comprise: carrier/interface ratio screening conditions and apart from screening conditions.Described carrier/interface ratio screening conditions can be used for filtering out the relative bearing with the sampled point correspondence of specifying the interior carrier/interface ratio of carrier/interface ratio scope, can filter out the sampled point that meets described carrier/interface ratio screening conditions according to above-mentioned carrier/interface ratio screening conditions; Describedly then can be used for filtering out the relative bearing of the sampled point correspondence that meets the distance to a declared goal condition, can meet described sampled point according to above-mentioned filtering out apart from screening conditions apart from screening conditions apart from screening conditions.
Fig. 5 carries out method for screening flow chart according to screening conditions to the relative bearing of each sampled point base station and source cell base station in the one embodiment of the invention.Referring to Fig. 5, said method comprising the steps of:
Step B31, the relative bearing of each sampled point base station and source cell base station is screened according to the carrier/interface ratio screening conditions.
Because carrier/interface ratio is too big, promptly the relative bearing that hour obtains very much of the descending level of cell-of-origin is very little to the influence that antenna azimuth caused of source cell base station, belongs to the relative bearing useless to subsequent calculations, so can ignore; And carrier/interface ratio is too little, be that the descending level of cell-of-origin is when too big, it then may be the relative bearing that calculates according to the sampled point in the sampled point sub-district relative with the azimuth, cell-of-origin, it can cause negative effect to the deviation of azimuth angle of base station antenna of determining the cell-of-origin, belong to the disadvantageous relative bearing of subsequent calculations, so should remove; Therefore, each sampled point base station that will obtain step B2 according to the carrier/interface ratio screening conditions in this step and the relative bearing of source cell base station are screened.Because the relative bearing of above-mentioned each sampled point base station and source cell base station is all corresponding to each sampled point, therefore above-mentioned screening process also can be regarded the screening to corresponding sampled point simultaneously as.In technical scheme of the present invention, concrete screening conditions can be provided with according to engineering is actual, for example, in an embodiment of the present invention, above-mentioned carrier/interface ratio screening conditions can be set to :-20dB～20dB, promptly as certain sampled point, for example the sampled point sub-district of the sampled point among Fig. 21 and the carrier/interface ratio Z of cell-of-origin 1Satisfy condition :-20dB≤Z 1During≤20dB, then this sampled point is the sampled point that meets above-mentioned carrier/interface ratio screening conditions, therefore, above-mentionedly according to the carrier/interface ratio screening conditions sampled point is carried out method for screening and be: keep the corresponding relative bearing of the sampled point that meets above-mentioned carrier/interface ratio screening conditions in the relative bearing of each sampled point base station that step B2 obtains and source cell base station and remove other the corresponding relative bearing of sampled point.
Step B32, the relative bearing of each sampled point base station and source cell base station is screened according to the distance screening conditions.
Because under different geographical environments, the distance between the sub-district (being the distance between the base station) is different.For example, in global system for mobile communications (GSM, Global System for MobileCommunications),, then can be 8 kilometers apart from maximum between two cell base stations if in the spaciousness district; If in the combination area of city and country, then can be 4 kilometers apart from maximum between two sub-districts; If at dense city, then can be 2 kilometers apart from maximum between two sub-districts.
Consider of the influence of above-mentioned geographical environment, in this step, also will screen once more the sampled point (being the relative bearing of sampled point correspondence) after screening among the step B31 according to the distance screening conditions for the deviation of azimuth angle of base station antenna of determining the cell-of-origin.Concrete can be provided with according to the peripheral geographical environment of cell-of-origin apart from screening conditions.For example, in the present embodiment, suppose that the cell-of-origin is positioned at spacious district, then above-mentioned can be made as apart from screening conditions: 0～8 kilometer, promptly work as certain sampled point, for example the sampled point base station 1 at 1 place of the sampled point among Fig. 2 and the distance D of source cell base station 1Satisfy condition: 0＜D 1In the time of≤8 kilometers, then this sampled point is the sampled point that meets above-mentioned carrier/interface ratio screening conditions, therefore, above-mentionedly according to the distance screening conditions sampled point is carried out method for screening and be: keep relative bearing that meets above-mentioned sampled point correspondence apart from screening conditions among the step B31 in the sampled point after the screening and the relative bearing of removing other sampled point correspondence.
Through the screening of above two steps, can be satisfied the relative bearing of the sampled point correspondence of distance and carrier/interface ratio screening conditions simultaneously; In addition, the execution sequence of above-mentioned steps B31 and B32 is interchangeable, each sampled point base station that promptly also can be earlier step B2 be obtained according to the distance screening conditions and the relative bearing of source cell base station are screened, and then according to the carrier/interface ratio screening conditions the above-mentioned sampled point that meets apart from screening conditions is screened, finally satisfied the relative bearing of the sampled point correspondence of distance and carrier/interface ratio screening conditions simultaneously.
The relative bearing of step B4, each sampled point base station that obtains according to screening and source cell base station obtains the antenna for base station azimuth of cell-of-origin.
In this step, the relative bearing that will satisfy each sampled point base stations of each sampled point correspondence of distance and carrier/interface ratio screening conditions and source cell base station when obtaining among the step B3 obtains the antenna for base station azimuth of cell-of-origin.
In this step, the azimuthal concrete computational methods of the antenna for base station of described cell-of-origin are: mean value computation is carried out in each sampled point base station of each sampled point correspondence of satisfying distance and carrier/interface ratio screening conditions simultaneously and the relative bearing of source cell base station, thereby obtain the antenna for base station azimuth of described cell-of-origin.
In an embodiment of the present invention, can use multiple mean value computation method commonly used to carry out above-mentioned mean value computation, for example, after the relative bearing of all resulting each sampled point base stations and source cell base station can being added up, again divided by the number of the relative bearing of above-mentioned resulting each sampled point base station and source cell base station, thereby obtain the antenna for base station azimuth of above-mentioned cell-of-origin.Because it is maximum to satisfy the sampled point quantity of distance and carrier/interface ratio screening conditions in the zone of the actual sensing in antenna for base station azimuth of cell-of-origin simultaneously, and a plurality of sampled points wherein, such as, sampled point 1-4 among Fig. 2, comprise the identical sampled point base station and the relative bearing angle information of source cell base station in the record, so the sampled point base station in described a plurality of sampled point record and the relative bearing angle information of source cell base station will occupy very big proportion in the azimuthal computational process of the antenna for base station of cell-of-origin, thereby the antenna for base station azimuth of the feasible cell-of-origin that obtains tallies with the actual situation more.
Behind the antenna for base station azimuth that calculates described cell-of-origin according to said method, the antenna for base station azimuth of above-mentioned cell-of-origin can be added in the respective table or record of database with for example form of record or field.
Step B5, judged whether to reach predetermined screening number of times, if, execution in step B6, if not, execution in step B3.
In this step, can preestablish a screening number of times, and can artificial judgment whether reach predetermined screening number of times, an initial value perhaps be set be 0 counter, behind each execution of step B4 then the currency of counter add 1, and judge whether the screening number of times that reaches predetermined according to the currency of counter.
When having reached the screening number of times of being scheduled to, with execution in step B6; And if when not reached predetermined screening number of times, then will return execution in step B3.When returning execution in step B3, the user can import required screening conditions (these screening conditions can be different with the screening conditions of last time), thereby the antenna for base station azimuth of resulting cell-of-origin is tallied with the actual situation more at every turn.In an embodiment of the present invention, the user can be by the different screening conditions of various input mode inputs commonly used in this area, and therefore, concrete input mode does not repeat them here.
In addition, in an embodiment of the present invention, also can select whether to omit above-mentioned steps B5 according to practical situations.For example, when above-mentioned predefined screening number of times is 1, can omit above-mentioned steps B5, directly execution in step B6.
Step B6, calculate the deviation of azimuth angle of base station antenna that obtains the cell-of-origin according to the antenna for base station azimuth of described cell-of-origin.
Owing to can obtain one or more antenna for base station azimuth of cell-of-origin by above-mentioned step B1～B5, therefore in this step, can determine the deviation of azimuth angle of base station antenna of cell-of-origin according to one or more antenna for base station azimuth of described cell-of-origin.
In this step, the method for the deviation of azimuth angle of base station antenna of concrete definite cell-of-origin is: mean value computation is carried out at the one or more antenna for base station azimuth to described cell-of-origin, thereby obtains the antenna for base station azimuth calculating value of cell-of-origin; The difference of the antenna for base station azimuth original value of the antenna for base station azimuth calculating value of described cell-of-origin and the cell-of-origin of gathering from the OMC database is the deviation of azimuth angle of base station antenna of described cell-of-origin.The deviation of azimuth angle of base station antenna of described cell-of-origin can be on the occasion of, negative value or null value, antenna for base station azimuth calculating value on the occasion of the described cell-of-origin of expression is bigger than the antenna for base station azimuth original value of the cell-of-origin of gathering from the OMC database, and negative value represents that the antenna for base station azimuth calculating value of described cell-of-origin is littler than the antenna for base station azimuth original value of the cell-of-origin of gathering from the OMC database; Null value represents that the antenna for base station azimuth calculating value of described cell-of-origin equates with the antenna for base station azimuth original value of the cell-of-origin of gathering from the OMC database.
In an embodiment of the present invention, can use multiple mean value computation method commonly used to carry out above-mentioned mean value computation, for example, after can being added up in a plurality of antenna for base station azimuth of resulting cell-of-origin, again divided by the azimuthal number of a plurality of antenna for base station of above-mentioned resulting cell-of-origin, thereby obtain the antenna for base station azimuth calculating value of above-mentioned cell-of-origin.
For example, when predetermined screening number of times is 1 time, then can obtain 1 antenna for base station azimuth of cell-of-origin, be the antenna for base station azimuth calculating value of cell-of-origin, therefore, the antenna for base station azimuth calculating value of described cell-of-origin and the difference of the antenna for base station azimuth original value of the cell-of-origin that obtains from the OMC database are the deviation of azimuth angle of base station antenna of described cell-of-origin.
In addition, in technical scheme of the present invention, can also use other several different methods to come to determine the deviation of azimuth angle of base station antenna of cell-of-origin, and in diverse ways, the initial data of gathering and choosing can be different according to the initial data of from the OMC database, gathering and choosing.In the above embodiment of the present invention, the initial data of gathering and choosing with institute is that above-described initial data is an example, and technical scheme of the present invention is described in detail.Those skilled in the art are according to above-mentioned description, be appreciated that the definite cell-of-origin that can also adopt other the deviation of azimuth angle of base station antenna method and with corresponding required collection of method and the initial data chosen, therefore do not repeat them here.
Fig. 6 is a method flow diagram of determining the deviation of azimuth angle of base station antenna of cell-of-origin in the another embodiment of the present invention.As shown in Figure 6, after step B, can further include:
Step C, judge whether the deviation of azimuth angle of base station antenna of cell-of-origin has surpassed predetermined threshold value, if, execution in step D then; If not, process ends.
In the network operation process after the initial installation of antenna for base station, because the influence of wind direction, some slight deviations all can take place in the antenna for base station azimuth, if deviation of azimuth angle of base station antenna is in certain scope, and be unlikely to influence the service quality of mobile communications network, then can not adjust the azimuth of this antenna, so if the deviation of azimuth angle of base station antenna of determining the cell-of-origin in a preset threshold value scope, for example ± 5 °, direct process ends then; Otherwise, with execution in step D.
Step D, in system, show the deviation information of the antenna azimuth of cell-of-origin.
In this step, described system can be the system of the deviation information of GIS-Geographic Information System (GIS) or other antenna azimuth that can show the cell-of-origin.Engineers and technicians can be by information shown in the system, understand the azimuthal deviation information of antenna for base station and in time adjust the antenna for base station azimuth, thereby overcome because of natural calamity or the azimuth angle deviation that other reasons took place causes mobile communication network quality to descend, safeguard the service quality of mobile communications network, realize the even running of mobile communications network.For example, if show in the system cell-of-origin deviation of azimuth angle of base station antenna-8 °, the antenna for base station azimuth calculating value that is described cell-of-origin is littler 8 ° than the antenna for base station azimuth original value of the cell-of-origin of gathering from the OMC database, then engineers and technicians need transfer the antenna for base station azimuth of described cell-of-origin big 8 °, the antenna for base station azimuth that is about to described cell-of-origin turns clockwise 8 °, just can make the service quality of mobile communications network recover normal.
The inventive method is determined the deviation of azimuth angle of base station antenna of cell-of-origin based on the portable terminal measured data, do not need specific purpose tool to go special measurement, and considered to have influence on the deviation of azimuth angle of base station antenna result's who determines the cell-of-origin multiple factor comprehensively, multiple screening conditions are provided, the flexibility ratio height, the applied environment that the result of measurement is also more realistic.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (12)

1. the method for a definite deviation of azimuth angle of base station antenna is characterized in that, described method comprises:
Steps A, from OMC operation and maintenance centre OMC database, gather and choose the required initial data of deviation of azimuth angle of base station antenna of determining the cell-of-origin; Wherein, described cell-of-origin is for determining the sub-district at the place, base station of antenna bearingt angular displacement;
Step B, determine the deviation of azimuth angle of base station antenna of cell-of-origin according to institute's initial data of gathering and choosing; Described initial data comprises: longitude and latitude, source cell base station antenna azimuth, each sampled point cell ID, the longitude and latitude of each sampled point base station and the carrier/interface ratio of each sampled point and cell-of-origin of cell-of-origin sign, source cell base station;
Wherein, described step B comprises:
Step B1, the initial data of gathering and choosing according to institute generate the required essential information of deviation of azimuth angle of base station antenna of determining the cell-of-origin;
Step B2, calculate the relative bearing of each sampled point base station and source cell base station according to the required essential information of the deviation of azimuth angle of base station antenna of above-mentioned definite cell-of-origin; Wherein, described sampled point base station is the base station of sampled point sub-district; Described sampled point sub-district be the sampled point place except the cell-of-origin and with other sub-districts the base station cell;
Step B3, the relative bearing of each sampled point base station and source cell base station is screened according to screening conditions;
The relative bearing of step B4, each sampled point base station that obtains according to screening and source cell base station obtains the antenna for base station azimuth of cell-of-origin;
Step B6, calculate the deviation of azimuth angle of base station antenna that obtains the cell-of-origin according to the antenna for base station azimuth of described cell-of-origin.
2. method according to claim 1 is characterized in that, after step B, this method further comprises:
Step C, judge whether the deviation of azimuth angle of base station antenna of cell-of-origin has surpassed predetermined threshold value, if, execution in step D, if not, process ends;
Step D, in system, show the azimuthal deviation information of antenna for base station of cell-of-origin.
3. method according to claim 1 is characterized in that, between step B4 and step B6, this method further comprises:
Step B5, judged whether to reach predetermined screening number of times, if, execution in step B6, if not, execution in step B3.
4. method according to claim 1 is characterized in that, is the center with the base station of cell-of-origin, and the due east direction is an x axle positive direction, and direct north is a y axle positive direction, sets up plane right-angle coordinate, and described step B1 comprises:
Step B11, determine each residing position in the plane right-angle coordinate of being set up, sampled point base station according to institute's initial data of gathering and choosing;
Step B12, calculate distance between each sampled point base station and source cell base station according to institute's initial data of gathering and choosing;
Step B13, calculate the longitude distance of each sampled point base station and source cell base station according to institute's initial data of gathering and choosing.
5. method according to claim 4 is characterized in that, determines among the described step B11 that the method for each residing position in the plane right-angle coordinate of being set up, sampled point base station is specially:
1) when the sampled point base station latitude greater than source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System, the position at this place, sampled point base station is the first quartile in the plane right-angle coordinate of being set up;
2) when the sampled point base station latitude greater than source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System, the position at this place, sampled point base station is second quadrant in the plane right-angle coordinate of being set up;
3) when the sampled point base station latitude less than source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System, the position at this place, sampled point base station is the third quadrant in the plane right-angle coordinate of being set up;
4) when the sampled point base station latitude less than source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System, the position at this place, sampled point base station is the four-quadrant in the plane right-angle coordinate of being set up;
5) equal source cell base station latitude and this sampled point base station longitude greater than the source cell base station Longitude In System when the sampled point base station latitude, the position at this place, sampled point base station is the x axle positive axis of set up in the plane right-angle coordinate;
6) equal source cell base station latitude and this sampled point base station longitude less than the source cell base station Longitude In System when the sampled point base station latitude, the position at this place, sampled point base station is the negative semiaxis of the x axle in the plane right-angle coordinate of being set up;
7) equal the source cell base station Longitude In System greater than source cell base station latitude and this sampled point base station longitude when the sampled point base station latitude, the position at this place, sampled point base station is the y axle positive axis in the plane right-angle coordinate of being set up;
8) equal the source cell base station Longitude In System less than source cell base station latitude and this sampled point base station longitude when the sampled point base station latitude, the position at this place, sampled point base station is the negative semiaxis of the y axle in the plane right-angle coordinate of being set up.
6. method according to claim 4 is characterized in that, in described step B12,
The formula of distance is between each sampled point base station of described calculating and source cell base station:
D 1＝R×arccos[cosb×cosy×cos(a-x)+sin?b×sin?y]×π/180
Wherein, D 1Represent distance between each sampled point base station and source cell base station, R is an earth radius, and x, y represent the longitude and the latitude of sampled point base station respectively; A, b represent the longitude and the latitude of source cell base station respectively.
7. method according to claim 4 is characterized in that, in described step B13,
The formula of the longitude distance of each sampled point base station of described calculating and source cell base station is:
L 1＝R×arccos[cos 2?b×cos(a-x)+sin 2?b]×π/180
Wherein, L 1Represent the longitude distance of each sampled point base station and source cell base station, R is an earth radius, and x represents the longitude of sampled point base station; A, b represent the longitude and the latitude of source cell base station respectively.
8. method according to claim 1, it is characterized in that, base station with the cell-of-origin is the center, the due east direction is an x axle positive direction, direct north is a y axle positive direction, set up plane right-angle coordinate, the method for calculating the relative bearing of each sampled point base station and source cell base station among the described step B2 is specially:
(1) when described sampled point base station is positioned at the first quartile of the plane right-angle coordinate of being set up: TD 1=90 °-arccos (L 1/ D 1);
(2) when described sampled point base station is positioned at second quadrant of the plane right-angle coordinate of being set up: TD 1=270 °+arccos (L 1/ D 1);
(3) when described sampled point base station is positioned at the third quadrant of the plane right-angle coordinate of being set up: TD 1=270 °-arccos (L 1/ D 1);
(4) when described sampled point base station is positioned at the four-quadrant of the plane right-angle coordinate of being set up: TD 1=90 °+arccos (L 1/ D 1);
(5) when described sampled point base station is positioned at the x axle positive axis of the plane right-angle coordinate of being set up, TD 1=90 °;
(6) when described sampled point base station is positioned at the negative semiaxis of the x axle of the plane right-angle coordinate of being set up, TD 1=270 °;
(7) when described sampled point base station is positioned at the y axle positive axis of the plane right-angle coordinate of being set up, TD 1=0 °;
(8) when described sampled point base station is positioned at the negative semiaxis of the y axle of the plane right-angle coordinate of being set up, TD 1=180 °;
Wherein, TD 1Represent the relative bearing of each sampled point base station and source cell base station; L 1Represent the longitude distance of each sampled point base station and source cell base station; D 1Represent distance between each sampled point base station and source cell base station.
9. method according to claim 1 is characterized in that, according to screening conditions the relative bearing of each sampled point base station and source cell base station is screened among the described step B3 to comprise:
Step B31, the relative bearing of each sampled point base station and source cell base station is screened according to the carrier/interface ratio screening conditions;
Step B32, the relative bearing of each sampled point base station and source cell base station is screened according to the distance screening conditions.
10. method according to claim 1 is characterized in that, the azimuthal method of antenna for base station that each sampled point base station that obtains according to screening among the described step B4 and the relative bearing of source cell base station obtain the cell-of-origin is specially:
Mean value computation is carried out in each sampled point base station of each sampled point correspondence of satisfying distance and carrier/interface ratio screening conditions simultaneously and the relative bearing of source cell base station, thereby obtain the antenna for base station azimuth of described cell-of-origin.
11. method according to claim 1 is characterized in that, the method for calculating the deviation of azimuth angle of base station antenna that obtains the cell-of-origin according to the antenna for base station azimuth of described cell-of-origin among the described step B6 is specially:
Mean value computation is carried out at one or more antenna for base station azimuth to the cell-of-origin, thereby obtains the antenna for base station azimuth calculating value of cell-of-origin; The difference of the antenna for base station azimuth original value of the antenna for base station azimuth calculating value of described cell-of-origin and the cell-of-origin of gathering from the OMC database is the deviation of azimuth angle of base station antenna of described cell-of-origin.
12. method according to claim 2 is characterized in that, described system is GIS-Geographic Information System GIS.
CN2009100897694A 2009-07-23 2009-07-23 Method for determining deviation of azimuth angle of base station antenna Expired - Fee Related CN101621817B (en)

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