CN109596089B

CN109596089B - Method and device for determining azimuth angle, electronic equipment and storage medium

Info

Publication number: CN109596089B
Application number: CN201710918482.2A
Authority: CN
Inventors: 李嘉; 幸锋; 杨丹; 嵇聪; 黄文星; 任春俊; 李晋; 高超云; 陈志伟; 吴志锋
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Yunnan Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Yunnan Co Ltd
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2021-08-13
Anticipated expiration: 2037-09-30
Also published as: CN109596089A

Abstract

The embodiment of the invention provides a method and a device for determining an azimuth angle, electronic equipment and a storage medium. The method comprises the steps of determining a position included angle according to position information of a sampling point and position information of a base station corresponding to the sampling point, wherein the position included angle takes the base station as a vertex and the due north direction as an initial edge and rotates clockwise to the angle of the sampling point; acquiring a relative AOA of a sampling point, wherein the relative AOA takes a normal of an antenna as an initial edge and rotates clockwise to the angle of the sampling point, the relative AOA is obtained according to the AOA of the due north direction standard, and the AOA of the due north direction standard is an angle which is obtained by a base station according to the azimuth angle of a working parameter and rotates anticlockwise to the sampling point by taking the due north direction as the initial edge; and determining the azimuth angle of the antenna according to the position included angle and the relative AOA. According to the method, the relative AOA irrelevant to the azimuth angle of the working parameter is obtained, so that the accuracy of the relative AOA is guaranteed, and the accuracy of the output actual azimuth angle can be improved.

Description

Method and device for determining azimuth angle, electronic equipment and storage medium

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method and a device for determining an azimuth angle, electronic equipment and a storage medium.

Background

In particular, in a cellular mobile communication network, a base station mainly uses a directional antenna to cover a specific area, so that the azimuth angle of the base station antenna plays a crucial role in the actual coverage effect of a cell and the overall network performance.

In the prior art, the means for measuring and calculating the azimuth angle are more, and the following means mainly exist in the general view:

firstly, an information acquisition person arrives at an antenna installation site and uses a compass to measure and record an azimuth angle;

means II, a hardware remote measuring mode, namely installing a special remote measuring device on a base station antenna, and transmitting the measuring information of the azimuth angle to a wireless receiving platform in a wireless mode, such as a remote device or a special receiving sampling point;

calculating an antenna radiation gain envelope line corresponding to the sampling point according to the signal intensity of the sampling point in the drive test data, thereby determining an antenna azimuth angle;

and fourthly, calculating a vector mean value as an azimuth Angle directly according to the antenna AOA (Angle-of-Arrival) in the measurement report, or calculating the area with the most concentrated antenna Arrival Angle as an antenna azimuth Angle.

Considering the problems of cost and accuracy, the current means is most widely applied.

The technical means in the prior art have the following technical problems:

the method has the obvious problems that a large amount of manpower, material resources and time are consumed, the efficiency is low, the updating speed is low, the antenna azimuth angle cannot be found in time under the condition that the antenna azimuth angle is changed if wind blows, third-party construction influence and the like occur, and influence is brought to network evaluation and network optimization scheme output;

the result acquired by the second means is accurate and updated timely, but a matched software and hardware platform and maintenance service need to be purchased, a measuring device needs to be installed on each antenna in deployment, and a wireless receiving platform is deployed at the same time, so that the engineering quantity is large, the popularization of the means is hindered due to high cost, and the current application area is small;

the method calculates the radiation gain of the antenna according to the level intensity of the sampling point, and then determines the azimuth angle of the antenna according to the envelope curve of the radiation gain, but the method has clear thought, but the environment in the actual network is complex and various, the signal transmission is not simple straight line sight distance transmission, a large amount of refraction and reflection do not have great influence on the result of the radiation gain, and the signal penetration loss is more closely related to the sheltered building material, so the final result error is too large;

the fourth means is mainly to calculate according to the AOA in the measurement report, but the AOA itself is a result of the azimuth calculation through the existing engineering parameters, if the azimuth of the existing engineering parameters has a problem, the AOA itself is not accurate enough; meanwhile, the accuracy of the AOA can be guaranteed only under the condition of linear line-of-sight transmission, and many paths after signal refraction and reflection in an actual network are not paths represented by simple linear connection of sampling points and antennas, so that the error can be further increased.

At present, no corresponding method for determining the azimuth angle efficiently, economically and accurately exists in the prior art.

Disclosure of Invention

In view of the defects in the prior art, embodiments of the present invention provide a method and apparatus for determining an azimuth angle, an electronic device, and a storage medium.

In one aspect, an embodiment of the present invention provides a method for determining an azimuth, where the method includes:

determining a position included angle according to position information of a pre-acquired sampling point and position information of a base station corresponding to the sampling point, wherein the position included angle is an angle formed by clockwise rotating to the sampling point by taking the base station as a vertex and taking the due north direction as an initial edge;

acquiring a relative AOA of a sampling point, wherein the relative AOA takes a normal of an antenna as an initial edge and rotates clockwise to the angle of the sampling point, the relative AOA is obtained according to the AOA of the due north direction standard, and the AOA of the due north direction standard is an angle which is obtained by a base station according to the azimuth angle of a working parameter and rotates anticlockwise to the sampling point by taking the due north direction as the initial edge;

and determining the azimuth angle of the antenna according to the position included angle and the relative AOA.

In another aspect, an embodiment of the present invention provides an apparatus for determining an azimuth, where the apparatus includes:

the device comprises a first determining module, a second determining module and a judging module, wherein the first determining module is used for determining a position included angle according to position information of a pre-acquired sampling point and position information of a base station corresponding to the sampling point, and the position included angle takes the base station as a vertex and the due north direction as an initial edge and rotates clockwise to the angle of the sampling point;

the acquisition module is used for acquiring a relative AOA of a sampling point, wherein the relative AOA takes a normal of an antenna as an initial edge and rotates clockwise to the angle of the sampling point, the relative AOA is obtained according to the AOA of the due north direction standard, and the AOA of the due north direction standard is calculated according to an azimuth angle of a base station according to an engineering parameter and rotates anticlockwise to the angle of the sampling point by taking the due north direction as the initial edge;

and the second determining module is used for determining the azimuth angle of the antenna according to the position included angle and the relative AOA.

In another aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, a bus, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the above method when executing the program.

In another aspect, an embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the above method.

According to the technical scheme, the method, the device, the electronic equipment and the storage medium for determining the azimuth angle provided by the embodiment of the invention have the advantages that the relative AOA irrelevant to the azimuth angle of the working parameter is obtained, the accuracy of the relative AOA is guaranteed, and the accuracy of the output actual azimuth angle can be improved. And need not to measure on the spot, saved manpower, material resources and time cost greatly, also need not to rely on extra device, with low costs, easily popularization and application.

Drawings

Fig. 1 is a schematic flow chart illustrating a method for determining an azimuth according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an included angle of position in a method for determining an azimuth according to an embodiment of the present invention;

fig. 3 and 4 are schematic diagrams illustrating conversion between an AOA of an antenna normal standard and an AOA of a due north direction standard of a method for determining an azimuth according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of relative AOA determination of a method for determining an azimuth according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a method for determining an azimuth angle according to an embodiment of the present invention;

fig. 7 is a partial schematic view of a method for determining an azimuth according to another embodiment of the present invention.

Fig. 8 and 9 are partial schematic views illustrating a method for determining an azimuth according to another embodiment of the present invention.

Fig. 10 is a schematic diagram of a method for determining an azimuth according to another embodiment of the present invention.

Fig. 11 is a screening diagram illustrating a method for determining an azimuth according to another embodiment of the present invention.

FIG. 12 is a schematic flow chart of a method for determining an azimuth angle according to another embodiment of the present invention;

fig. 13 is a schematic structural diagram of an apparatus for determining an azimuth according to another embodiment of the present invention;

fig. 14 is a schematic structural diagram of an electronic device according to yet another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

The terminology of the embodiments of the present invention is explained:

the normal of the antenna is a ray extending toward the maximum radiation direction of the antenna, which is determined by the Azimuth angle (Azimuth angle) of the antenna, with the antenna as an end point.

The azimuth angle refers to the angle of rotation of the antenna on the horizontal plane, specifically the angle formed by clockwise rotation from the north to the normal of the antenna, and the range of the azimuth angle is 0-360 degrees.

Data port S1: the interface of S1 is an interface between an access network and a core network, that is, an interface between a base station (eNodeB) and an MME (Mobility Management Entity), and the data of the interface S1 mainly includes signaling data of the interface S1-U and the interface S1-MME, and contains more information, which is mainly interaction information of an application layer of a sampling point during a network use process, but does not carry network quality information of a wireless side as a whole. The interactive information of the sampling point in the network use process comprises longitude and latitude information of the position of the sampling point. The latitude and longitude information mainly comes from a GPS device at present, and the positioning precision is enough to meet the requirement of network optimization.

MRO data: the MR (Measurement Report) reported by the sampling point to the base station includes MRO (MR Original, Measurement Report sample data), MRs (MR Statistics, Measurement Report Statistics), and MRE (MR Event, Event-triggered Measurement Report sample), where the MRO data is user-level data in the MR, and is measured by taking the sampling point as a unit, and the MRO data includes TA (Timing Advance, time Advance) and AOA (Angle-of-Arrival).

TA: because a certain air interface propagation delay (Round trip delay) exists between the sampling point and the base station, the time synchronization point of the sampling point is inconsistent with the time synchronization point of the base station, in order to eliminate the time synchronization deviation between the sampling point and the base station, the sampling point needs to perform time adjustment before transmitting a signal, the signal is transmitted according to the time synchronization point of the base station, and the adjusted content is TA, so that the signal of the sampling point can accurately fall into a receiving time window of the base station. In addition, because the movement of the sampling point may cause a continuous change of an air interface propagation delay of the sampling point, thereby causing a continuous change of the TA value, the base station also needs to periodically detect the TA value of the sampling point. Therefore, the distance corresponding to the signal propagation path, i.e. the distance between the sampling point and the base station, can be calculated by the TA and the signal propagation speed.

AOA: the method is that the receiving antenna array judges the arrival direction of the signal by utilizing a plurality of detected signal incident angles, and the position of a target (namely, a sampling point) can be calculated by a plurality of AOAs. From the realization principle, the judgment is carried out according to the signal incidence direction, so that in the actual cellular mobile communication, the angle between the AOA where the signal is converted through the refraction and reflection paths and the position of the actual sampling point has a certain error.

Fig. 1 is a schematic flow chart illustrating a method for determining an azimuth angle according to an embodiment of the present invention.

As shown in fig. 1, the method provided in the embodiment of the present invention specifically includes the following steps:

step 101, determining a position included angle according to position information of a pre-acquired sampling point and position information of a base station corresponding to the sampling point, wherein the position included angle takes the base station as a vertex and a due north direction as an initial edge and rotates clockwise to the angle of the sampling point;

the device for determining the azimuth angle in the embodiment of the present invention is a local PC (personal computer), and a processor having an independent calculation processing function is applied to the embodiment of the present invention to determine the azimuth angle.

Optionally, the PC extracts data of port S1 from port S1, where the data of port S1 includes position information of a plurality of sampling points, and one sampling point is a terminal.

Optionally, a work parameter table of the serving cell corresponding to the sampling point is obtained, where the work parameter table includes the location information of the base station.

Fig. 2 is a schematic diagram illustrating an included angle of position in a method for determining an azimuth according to an embodiment of the present invention.

As shown in fig. 2, according to the location information Loc _ (Lon, Lat) of the sampling point and the location information BS _ (Lon, Lat) of the base station, a linear distance L _ exact between the sampling point and the base station is determined, the north direction is a direction in which the base station is an end point and the north direction is extended, a vertex of the Angle _ exact is the base station, one side is the north direction, and the other side is a shortest connecting line between the sampling point and the base station.

102, obtaining a relative AOA of a sampling point, wherein the relative AOA takes a normal of an antenna as an initial edge and rotates clockwise to the angle of the sampling point, the relative AOA is obtained according to the AOA of the due north direction standard, and the AOA of the due north direction standard is an angle which is obtained by a base station according to the azimuth angle of an engineering parameter and rotates anticlockwise to the sampling point by taking the due north direction as the initial edge;

fig. 3 and 4 respectively show a conversion diagram of the AOA of the antenna normal standard and the AOA of the due north direction standard of the method for determining an azimuth angle provided by the embodiment of the present invention.

As shown in fig. 3 and 4, the AOA has two calculation criteria, one is the true north direction criterion, and the other is the antenna normal criterion. The AOA (alpha) of the antenna normal standard is obtained by measuring a sampling point, and rotates clockwise to the Angle of the sampling point by taking the normal of the antenna as an initial edge, and the AOA (gamma) of the due north direction standard is obtained by calculating the Angle of the sampling point by taking the due north direction as the initial edge by the base station according to the AOA of the antenna normal standard and the azimuth Angle (Angle _ virtual, azimuth Angle theoretical value, beta) of the working parameters.

For example, the base station converts α into γ, where clockwise and counterclockwise are only used to specify the rotation meaning of the angle, but do not indicate the positive and negative of the angle, and if the angle is negative, 360 is added to convert into a positive angle:

optionally, the following description is adopted for the position relationship between the sampling point and the normal: the relationship that the position of the sampling point is taken as a starting point and the path rotated to the normal is taken as a clockwise position is called that the sampling point is on the clockwise side of the normal of the antenna. Accordingly, a position relationship in which the path rotated to the normal is counterclockwise with the position of the sampling point as the starting point is referred to as that the sampling point is on the counterclockwise side of the normal of the antenna.

As shown in fig. 3, in the two-dimensional coordinate system, the sampling point is on the right of the normal, which means that the position of the sampling point is on the counterclockwise side of the normal of the antenna, α is 20 degrees, the azimuth angle in the working parameter is β, and β is 40 degrees, two sides of the azimuth angle are the north direction and the normal, respectively, then the normal determined by the base station is at the position of 40 degrees, then γ is calculated according to the following formula:

γ 360- (α + β) 360- (20+40) 300 degrees;

wherein γ is AOA of the due north direction standard, that is, AOA of the due north direction standard obtained by the PC in the embodiment of the present invention is 300 degrees.

As shown in fig. 4, accordingly, the sampling point is to the left of the normal in the two-dimensional coordinate system, and the position of the sampling point is clockwise of the normal of the antenna, then γ is calculated according to the following formula:

γ＝360-[β-(360-α)]。

it can be understood that, because the azimuth angle of the working parameter obtained by the base station is measured and calculated by the prior art, there may be an error, which causes an error in the normal line determined by the base station, and the azimuth angle is calculated by using the AOA related to the azimuth angle of the working parameter, which cannot ensure the accuracy of the calculated azimuth angle.

Alternatively, an angle of clockwise rotation to a sampling point with the normal of the antenna as a starting edge is referred to as a relative AOA.

Fig. 5 is a schematic diagram illustrating relative AOA determination of a method for determining an azimuth according to an embodiment of the present invention.

As shown in fig. 5, the relative AOA is determined in a similar manner to the manner in which the AOA of the antenna normal standard of fig. 3 is converted into the AOA of the antenna north standard, and the relative AOA is 360- (azimuth of the working parameter + AOA of the antenna north standard) 360- (β + γ).

It can be understood that the calculation of the relative AOA requires the Angle _ virtual of the working parameter Angle, because the AOA is a result of the calculation of the working parameter Angle _ virtual according to the specified AOA, but the Angle _ virtual has inaccuracy, so that the relative Angle (specified as clockwise direction) between the sampling point and the normal of the antenna needs to be calculated by using the matched working parameter Angle first. Therefore, the error of the working parameter azimuth angle can be ignored, and the error is only used as intermediate conversion and has no practical significance, so that the error caused by the error of the working parameter azimuth angle is avoided.

And 103, determining the azimuth angle of the antenna according to the position included angle and the relative AOA.

Fig. 6 is a schematic diagram illustrating a method for determining an azimuth angle according to an embodiment of the present invention.

As shown in fig. 6, the position included angle is an angle obtained by clockwise rotating to a sampling point with the due north direction as an initial edge calculated in the step 101, and the relative AOA is an angle obtained by clockwise rotating to a sampling point with the normal of the antenna as an initial edge calculated in the step 102. And subtracting the relative AOA from the position included angle to determine the actual azimuth angle beta'.

According to the method for determining the azimuth angle, the relative AOA which rotates clockwise to the sampling point by taking the normal line of the antenna as the starting edge is obtained, so that the accuracy of the relative AOA is guaranteed, and the accuracy of the output actual azimuth angle can be improved. And need not to measure on the spot, saved manpower, material resources and time cost greatly, also need not to rely on extra device, with low costs, easily popularization and application.

As shown in fig. 1, on the basis of the above embodiment, a method for determining an azimuth angle according to another embodiment of the present invention further includes, after acquiring the relative AOAs of the sampling points: obtaining a relative AOA that satisfies a first condition:

the first condition is that: within a predetermined main lobe range of the antenna coverage.

If the relative AOA is 0, it means that the sampling point is on the normal of the antenna, and the main lobe range covered by the antenna can be determined by the normal of the antenna.

Through test verification, when the sampling point is in the range of the antenna main lobe, the accuracy of the normal standard AOA and the relative AOA is higher, and the error is within 3 degrees, so that in order to further reduce the error, only the sampling point of the relative AOA in the range of the antenna main lobe is analyzed.

Optionally, the main lobe range covered by the antenna is in the range of 0 degrees to 30 degrees, or in the range of 330 degrees to 359 degrees.

Other steps of this embodiment are similar to those of the previous embodiment, and are not described again in this embodiment.

According to the method for determining the azimuth angle, the sampling points with the referential property are screened out by the AOA of the sampling points, the AOA of the sampling points in the due north direction standard is used as basic data to adjust the azimuth angle, and the accuracy of the calculated azimuth angle can be improved.

As shown in fig. 1, on the basis of the above embodiment, a method for determining an azimuth angle according to another embodiment of the present invention further includes, after acquiring the relative AOAs of the sampling points:

acquiring sampling points corresponding to the relative AOA meeting the following second condition:

the second condition is that: and the difference value of the first distance and the second distance is less than or equal to a second threshold, the first distance is determined according to the position information of the sampling point and the position information of the base station, and the second distance is determined according to the time advance TA of the sampling point and a preset signal propagation speed.

Optionally, as shown in fig. 2, a first distance between the sampling point and the base station is determined according to the position information of the sampling point obtained in step 101 and the position information of the base station.

Optionally, a measurement report of the sampling point is obtained, the measurement report including the TA of the sampling point.

Optionally, a signal propagation distance, i.e. a distance L _ error from the sampling point to the antenna of the base station, is calculated according to TA.

Optionally, the following formula L _ erroneous is used for calculation:

l _ error ═ TA signal propagation velocity

In the formula, TA is a unitless value, and the signal propagation speed is a preset value, for example, 78.12m, which means 78.12m per second.

The first distance L _ exact is a distance calculated according to the position information, the second distance L _ error is a signal propagation distance calculated according to TA, and TA is a mark of a time advance for making signals consistent in time. Based on the consideration, when the difference between L _ exact and L _ error is within the second threshold, the measurement report of the sampling point is considered to be based on the signal line-of-sight propagation measurement, and the TA of the sampling point in this scenario is referred.

According to the method for determining the azimuth angle, the distance between the sampling point and the base station is calculated in two ways, the sampling point with the referential property is screened out, the standard AOA in the due north direction of the sampling point is used as basic data, the azimuth angle is adjusted, and the accuracy of the calculated azimuth angle can be improved.

As shown in fig. 1, on the basis of the above embodiment, the method for determining an azimuth according to another embodiment of the present invention is provided, where the position information of the sampling point is obtained through data of S1, the angle of arrival AOA of the antenna normal standard of the sampling point and the AOA of the due north direction standard of the sampling point are obtained through measurement reports, and the data of S1 further includes a first identifier of the sampling point and a first time, where the first time is a time when the sampling point is determined to be at the position information; the measurement report further comprises a second identifier of the sampling point and a second moment, wherein the second moment is the moment of determining an angle of arrival (AOA) of an antenna normal standard of the sampling point and an AOA of a due north direction standard;

accordingly, after the relative AOAs of the sampling points are acquired, the method further comprises:

acquiring sampling points corresponding to the relative AOA meeting the following third condition:

a third condition: the first identifier is the same as the second identifier, and the time difference between the first time and the second time is less than or equal to a third threshold.

In this step, the preprocessed data of the port S1 and the measurement report are mapped one-to-one, so that the steps 101 and 103 are performed for the same sampling point, and the specific mapping rule is the third condition.

The first identifier and the second identifier may be MME-S1api (application protocol, Sl interface application protocol identifier), and the third threshold is ± 14120 ms.

In addition, if a plurality of sampling point measurement reports exist within 14120ms of time difference, the measurement report of the sampling point with the closest time difference is taken.

According to the method for determining the azimuth angle, the data and the measurement report of the S1 port are mapped one to one, so that the subsequent steps are performed on the same sampling point, and a data base is provided for the calculation of the azimuth angle.

As shown in fig. 1, on the basis of the foregoing embodiment, the method for determining an azimuth according to another embodiment of the present invention includes the following steps in step 102:

converting the standard AOA in the due north direction into an intermediary AOA, wherein the intermediary AOA takes the due north direction as an initial edge and rotates clockwise to an angle of a sampling point;

if the intermediate AOA is judged and obtained to be more than or equal to the azimuth angle of the working parameter, the relative AOA is the azimuth angle of the intermediate AOA-working parameter;

and if the intermediate AOA is judged and known to be smaller than the azimuth angle of the working parameter, the relative AOA is 360- (the azimuth angle of the working parameter-the intermediate AOA).

Fig. 7 is a partial schematic diagram illustrating a method for determining an azimuth angle according to an embodiment of the present invention.

As shown in FIG. 7, the AOA of the due north direction criterion is converted to an intermediary AOA according to the following formula:

intermediary AOA is 360-normal north AOA.

Where the solid line indicates AOA (γ) of the north-positive direction standard of 300 degrees, and the PC acquires the intermediary AOA (AOA _1) of the angle clockwise with the north-positive direction as a reference, which is indicated by the dotted line: 60 degrees.

Fig. 8 and 9 are partial schematic diagrams illustrating a method for determining an azimuth angle according to an embodiment of the present invention.

There are two cases with respect to AOA.

One is that, as shown in FIG. 8, the medium AOA ≧ β indicates that the sampling point is located counterclockwise from the normal of the antenna, e.g., 60 degrees greater than 40 degrees, the relative AOA can be calculated according to the following formula:

relative AOA- β is an intermediary AOA- β.

Another is the intermediate AOA with the azimuth angle β of 40 ° in the working parameter and the north direction as the reference, and the clockwise included angle as shown in fig. 9: 10 degrees, 10 degrees are less than 40 degrees, the intermediary AOA is less than beta, the position of the sampling point is on the clockwise side of the normal line of the antenna, and then the included angle between the normal line of the antenna and the position of the sampling point in the clockwise direction is calculated relative to the AOA according to the following formula:

relative AOA 360 ═ β -mediated AOA.

The method for determining the azimuth angle provided by this embodiment provides a data base for subsequent comparison with the normal direction standard AOA by calculating the relative AOA.

As shown in fig. 1, on the basis of the above embodiment, the method for determining an azimuth according to another embodiment of the present invention specifically includes the following steps of determining an actual azimuth according to a position angle and a relative AOA:

if the sampling point is on the counterclockwise side of the normal of the antenna, the actual azimuth angle is equal to the position included angle-relative AOA;

if the sampling point is clockwise from the normal of the antenna, the actual azimuth angle is the angle of position + (360-relative AOA).

As shown in FIG. 6, if the relative AOA is within the [0, 30] interval, the sampling point is illustrated to be on the counterclockwise side of the normal. Wherein the normal is determined according to the azimuth angle beta in the working parameters.

Optionally, the actual azimuth β' is the included angle of position — relative AOA, and if the actual azimuth is less than 0, the actual azimuth is added by 360 to be the actual azimuth.

Fig. 10 is a schematic diagram illustrating a method for determining an azimuth according to another embodiment of the present invention.

As shown in fig. 10, if the relative AOA is within the interval [330, 359], it is illustrated that the sampling point is clockwise of the normal of the antenna.

Optionally, the actual azimuth angle β' ═ angle of position + (360-relative AOA).

In the formula, the Angle _ exact is an Angle obtained by clockwise rotating the sample point to the north direction as the starting edge calculated in the step 101. The relative AOA is an angle obtained by clockwise rotating the antenna to a sampling point with the normal of the antenna as an initial edge, which is calculated in the step 102.

If the actual azimuth angle is larger than or equal to 360, subtracting 360 from the actual azimuth angle to be used as the actual azimuth angle.

In this step, since the relative AOA is a value independent of the working parameter azimuth angle through the aforementioned step 102, and is a reliable value, the accuracy of the actual azimuth angle value is also reliable.

According to the method for determining the azimuth angle, the relative AOA with small error is obtained, so that the accuracy of the relative AOA is guaranteed, and the accuracy of the output actual azimuth angle beta' can be guaranteed. And need not to measure on the spot, saved manpower, material resources and time cost greatly, also need not to rely on extra device, with low costs, easily popularization and application.

As shown in fig. 1, on the basis of the above embodiment, a method for determining an azimuth according to another embodiment of the present invention further includes, after step 103:

dividing 360 degrees into a plurality of non-overlapping angle intervals with the same granularity;

counting the number of azimuth angles in each angle interval, and acquiring the angle interval with the largest number;

and if the angle interval with the largest number is [ theta, theta + angle ], where theta is the left boundary of the angle interval, and angle is the granularity, the azimuth angle is [ theta + (theta + angle) ]/2.

It can be understood that, in the embodiment of the present invention, the azimuth angle of the directional antenna is measured, that is, the azimuth angle of the directional antenna is unique, and the processing from step 101 to step 103 is performed on each sampling point of the serving cell, so that each sampling point can obtain a corresponding actual azimuth angle.

Because the position information of the sampling points and the AOA of the normal standard may be inaccurate, after the azimuth angles corresponding to the number of the sampling points are obtained, the azimuth angles need to be screened to determine a unique azimuth angle as the azimuth angle of the directional antenna.

As shown in fig. 11, the obtained azimuth angles are marked in the same coordinate system, and each azimuth angle is filtered in a preset interval, so as to count the number of azimuth angles in different intervals.

For example, the preset interval is 20, and the number of azimuth angles in the interval from 0 to 20 degrees and the number of azimuth angles in the interval from 1 to 21 degrees are counted, and so on. From this, the interval in which the number of azimuth angles is the greatest can be determined.

Optionally, the angle interval with the largest number of azimuth angles is obtained, and if the angle interval with the largest number is [ θ, θ + angle ], the azimuth angle is [ θ + (θ + angle) ]/2. That is, in the two-dimensional coordinate system, the central line of the angle interval is taken as the actual normal of the antenna, and the azimuth angle is determined by the angle between the actual normal of the antenna and the due north direction.

If the interval with the largest number of azimuth angles is 0 to 20 degrees, that is, the area with the most concentrated azimuth angles determined by each sampling point, the central line 10 degrees of the concentrated area is taken as the normal.

In the prior art, when multiple azimuth angles are obtained, a method of averaging the azimuth angles of each interval is adopted to determine a unique azimuth angle, but in this embodiment, since there may be a case where an error of azimuth angle calculation corresponding to a sampling point is large, if an average value is calculated according to all azimuth angles, and the average value is calculated under the condition that extreme data with large errors are included, the accuracy of the obtained average value is not high, so that a method of sampling and analyzing a concentration trend of the azimuth angles is adopted, and a central line of a concentrated region is taken as a normal line, so that the accuracy of azimuth angle calculation can be improved.

According to the method for determining the azimuth angle, the accuracy of azimuth angle calculation can be improved by analyzing the concentrated region of the obtained multiple azimuth angles and taking the central line of the concentrated region as the actual normal line.

In order to more fully understand the technical content of the present invention, on the basis of the above embodiments, the method for determining the azimuth provided by the present embodiment is explained in detail.

For the problems in the prior art, if a new measure is considered to measure and calculate the actual azimuth angle of the base station antenna, the following aspects need to be considered:

1. the accuracy is high, the output requirement of a network evaluation and optimization scheme can be met, and the error is preferably controlled to +/-5 ℃;

2. the economic applicability is high, and the method can be completely and autonomously realized on the existing platforms and personnel;

3. the attention is paid to the improvement of efficiency, and the whole network can be realized in batch.

Based on the three considerations, the invention provides an economic, efficient and extremely high-accuracy method for calculating the azimuth angle of the directional antenna of the base station. Firstly, respectively acquiring data analysis objects: longitude and latitude information of a user sampling point can be extracted from the data of the S1 port, and the information comes from a GPS acquisition result; the TA and the AOA of the sampling point can be obtained from the MRO data; secondly, performing correlation matching on the two types of data, comparing the distance obtained through the longitude and latitude information of the GPS with the distance calculated by the TA, and removing the AOA with large error in the MRO; then calculating an original relative AOA according to an azimuth angle in the working parameters (the data can be set randomly); and finally, calculating the actual azimuth angle of the antenna by combining the longitude and latitude of the GPS according to the sampling points which are relative to the AOA and come from the vicinity of the normal line of the antenna. In the process, various factors which can bring errors are theoretically eliminated, the accuracy is guaranteed, meanwhile, the existing operation data is applied, batch analysis and calculation can be carried out, the cost is low, the efficiency is high, and the daily optimization requirements are completely met.

Fig. 12 is a schematic flow chart illustrating a method for determining an azimuth according to another embodiment of the present invention.

As shown in fig. 12, the following is specifically explained:

s10 data preprocessing of S1 port

The signaling data of the S1 port contains a plurality of information, the current apps all have the authority of obtaining the user position, the position information mainly comes from the longitude and latitude Loc (Lon, Lat) of the user collected by a GPS device, and the distance L _ exact and the Angle Angle _ exact of the sampling point relative to the service base station can be calculated according to the Loc (Lon, Lat) and the longitude and latitude BS (Lon, Lat) of the base station, and the calculation formulas are respectively as follows:

L_exact＝distance[Loc_(Lon，Lat),BS_(Lon，Lat)]

Angle_exact＝angle[Loc_(Lon，Lat),BS_(Lon，Lat)]

the specific algorithm is as follows:

defining the constant L-111194.926644559 to represent the distance by 1 latitude;

as shown in fig. 2, four quadrants are divided according to the relative positions of Loc _ (Lon, Lat) and BS _ (Lon, Lat), with BS _ (Lon, Lat) as the origin, and the description is given by taking quadrant 1 as an example:

a＝L*ABS(BS_lat-Loc_lat)；

b＝ABS(BS_lon-Loc_lon)*cos(Pi/360*(BS_lat+Loc_lat))*L；

Angle_exact＝90-180*arctan(a/b)/Pi。

s11 MRO data preprocessing

The MRO data comprises TA and AOA information, the TA can calculate the signal propagation distance L _ error, and the AOA can calculate the included angle AOA _ relative between the signal sampling point and the normal line of the antenna. The L _ erroneous calculation method is as follows:

L_erroneous＝TA*78.12

the calculation of AOA _ relative needs to use Angle _ virtual, because the AOA is a result of calculation through Angle _ virtual according to the specified AOA, but there is inaccuracy in Angle _ virtual, so it needs to first calculate the relative Angle (specified as clockwise direction) between the sampling point and the antenna normal by using the matched Angle. Therefore, the error of the working parameter azimuth angle can be ignored, and the error is only used as intermediate conversion and has no practical significance, so that the error caused by the error of the working parameter azimuth angle is avoided, and the calculation steps are as follows:

step 1: calculating the clockwise included angle AOA _1 of the sampling point by taking the north direction as the reference

AOA _1 ═ 360-north-positive direction standard AOA, where AOA _1 is the aforementioned intermediary AOA.

Step 2: and calculating an included angle AOA _ relative between the sampling point in the clockwise direction and the normal line of the antenna by taking the normal line of the antenna as a reference.

If AOA _1 is more than or equal to Angle _ virtual, AOA _ relative is AOA _1-Angle _ virtual;

wherein Angle _ virtual is the azimuth of the working parameter, and AOA _ relative is the relative AOA.

If AOA _1 < Angle _ virtual, AOA _ relative is 360- (Angle _ virtual-AOA _ 1).

s20 data association mapping

The flow mainly maps the preprocessed data of the S1 port and the MRO data one to one, and the mapping rule is as follows:

condition a: MMES1APID of two-dimensional data sampling points are the same;

condition b: the sampling time difference of the two-dimensional data sampling points is within +/-14120 ms;

condition c: and if a plurality of MRO sampling points exist in 14120ms of time difference, matching is carried out by taking the time difference to be the nearest.

Condition a and condition b need to be satisfied simultaneously, and condition c is a supplementary explanation of conditions a and b.

The mapped sampling points simultaneously carry the following information:

sampling point ID: uniquely identifying a sampling point;

ECGI: a service cell corresponding to the sampling point;

l _ exact: calculating the distance between a sampling point and a service cell according to the GPS information, namely the linear line-of-sight distance;

angle _ exact: calculating the clockwise angle between the sampling point and the true north direction according to the GPS information;

l _ erroneous: calculating a signal propagation distance according to the TA;

angle _ relative: and calculating an included angle between the sampling point and the normal line of the antenna in the clockwise direction according to the AOA.

s30 eliminating error sampling points caused by actual complex network environment

Based on Step-s20, the relevant important data are calculated again with emphasis analysis:

l _ exact: calculating the distance between a sampling point and a service cell according to the GPS information, namely the linear line-of-sight distance; l _ erroneous: the signal propagation distance calculated from TA is a sign of a timing advance because TA is for making signals temporally coincident, and L _ error calculated from the speed of light can only represent the distance traveled by a signal propagation path, and most signals cannot propagate in a straight line of sight in an actual network, and path transition such as complicated refraction and reflection occurs, so that it is difficult for L _ exact and L _ error to all coincide. Based on the consideration, when the difference between L _ exact and L _ error is within the Threshold of error Threshold, the measurement report of the sampling point is considered to be obtained based on signal line-of-sight propagation measurement, and the AOA in the scene has referential property; meanwhile, the Angle _ relative is directly analyzed, namely the clockwise included Angle of the sampling point relative to the normal line of the antenna, and the analyzed relative included Angle is irrelevant to whether the set value of the working parameter azimuth Angle is accurate or not.

Further, analyze Angle _ relative, if Angle _ relative is 0, it means that the sampling point is in the normal direction of the antenna (right opposite to the antenna), and it is considered to be in the main lobe direction covered by the antenna in the intervals [0, 30] and [330, 359 ]. Tests prove that the AOA accuracy is higher when the UE is in the main lobe direction of the antenna, the error is within 3 degrees, and therefore only the sampling points of Angle _ relative in the intervals of [0, 30] and [330, 359] are analyzed for further reducing the error. Therefore, the conditions for selecting the analysis data object are finally determined as follows:

condition 1: the difference between L _ exact and L _ error is within the Threshold of error;

condition 2: angle _ relative is within the interval [0, 30] and [330, 359 ].

Both conditions need to be met simultaneously.

s40 calculation of antenna azimuth

In order to calculate the actual azimuth angle of the antenna, the following information is focused:

sampling point ID: uniquely identifying a sampling point;

ECGI: a service cell corresponding to the sampling point;

angle _ exact is an Angle which is calculated according to GPS information and takes the north direction as a normal line and is clockwise when a connection line from a sampling point to a service cell is connected;

angle _ relative is the Angle of the sampling point clockwise with the antenna normal as the reference.

Knowing Angle _ exact and Angle _ relative, the actual Azimuth of the antenna can be calculated as follows:

if Angle _ relative is within the interval [0, 30], as shown in fig. 6, which illustrates that the sampling point is right of the normal of the antenna, then Azimuth is Angle _ exact-Angle _ relative, if Azimuth is greater than or equal to 0, then Azimuth is Azimuth; if Azimuth is less than 0, Azimuth is Azimuth + 360;

if Angle _ relative is within the interval [330, 359], as shown in fig. 10, it means that the sampling point is on the left of the normal of the antenna, then Azimuth is Angle _ exact + (360-Angle _ relative), if Azimuth is greater than or equal to 360, then Azimuth is Azimuth-360; if Azimuth < 360, Azimuth is equal to Azimuth.

Obtaining Azimuth1, Azimuth2 and Azimuth3 … … calculated by all sampling points of a cell, then gradually increasing 1-degree step length in the range from 0 degree to 359 degrees for each cell angle interval, and calculating the number of sampling points in the 20-degree interval, wherein the angle interval with the largest number of sampling points is the actual Azimuth of the cell.

Wherein, the procedure can be simply illustrated as follows:

the method for determining the azimuth angle provided by the embodiment uses an algorithm that an AOA is used for calculating an included angle relative to the normal line of the antenna so as to prevent application errors caused by errors in recording of the working parameter azimuth angle, and calculates the angle of the normal line of the antenna according to the GPS information of the sampling point and the included angle of the sampling point relative to the normal direction of the antenna. The method has the following technical effects:

1. the actual azimuth angle of the base station antenna can be accurately calculated, and the error can be controlled within 5 degrees under normal conditions, so that the daily optimization requirement is met;

2. the method can be rapidly carried out in batches, so that the labor, material and time costs are greatly saved;

3. the method does not depend on an additional device, carries out submergence excavation on the existing data, has strong practicability and is easy to popularize and apply.

Fig. 13 is a schematic structural diagram illustrating an apparatus for determining an azimuth according to yet another embodiment of the present invention.

Referring to fig. 13, on the basis of the above embodiment, the apparatus for determining an azimuth provided by this embodiment includes a first determining module 131, an obtaining module 132, and a second determining module 133, where:

the first determining module 131 is configured to determine a position included angle according to position information of a pre-obtained sampling point and position information of a base station corresponding to the sampling point, where the position included angle is an angle formed by clockwise rotating to the sampling point with the base station as a vertex and a due north direction as an initial edge; the obtaining module 132 is configured to obtain a relative AOA of the sampling point, where the relative AOA is an angle from a normal of the antenna as an initial edge to the sampling point by rotating clockwise, the relative AOA is obtained according to the AOA of the due north direction standard, and the AOA of the due north direction standard is an angle from the base station to the sampling point by rotating counterclockwise by taking the due north direction as the initial edge according to the azimuth angle of the working parameter; the second determining module 133 is configured to determine an azimuth angle of the antenna according to the position angle and the relative AOA.

Optionally, as shown in fig. 2, the first determining module 131 determines a linear distance L _ exact between the sampling point and the base station according to the position information Loc _ (Lon, Lat) of the sampling point and the position information BS _ (Lon, Lat) of the base station, where the north direction is a direction that takes the base station as an end point and extends in the north direction, a vertex of the Angle _ exact is the base station, one side is the north direction, and the other side is a shortest connecting line between the sampling point and the base station.

As shown in fig. 3 and 4, the AOA has two calculation criteria, one is the true north direction criterion, and the other is the antenna normal criterion.

Alternatively, the relative AOA may be obtained by calculation. And the relative AOA is irrelevant to the azimuth angle of the working parameter, and if the relative AOA is accurate, the sampling point corresponding to the relative AOA is an accurate sampling point.

The second determining module 133 subtracts the relative AOA from the included angle to determine the actual azimuth angle β'.

The apparatus for determining an azimuth angle provided in this embodiment may be used to perform the method in the foregoing method embodiment, and details of this implementation are not repeated.

According to the device for determining the azimuth angle, the relative AOA irrelevant to the azimuth angle of the working parameter is obtained, so that the accuracy of the relative AOA is guaranteed, and the accuracy of the output actual azimuth angle can be improved. And need not to measure on the spot, saved manpower, material resources and time cost greatly, also need not to rely on extra device, with low costs, easily popularization and application.

Referring to fig. 14, an electronic device according to an embodiment of the present invention includes a memory (memory)141, a processor (processor)142, a bus 143, and a computer program stored in the memory 141 and running on the processor. The memory 141 and the processor 142 complete communication with each other through the bus 143.

The processor 142 is used for calling the program instructions in the memory 141 to implement the method of fig. 1 when executing the program.

In another embodiment, the program when executed by a processor implements a method comprising:

after the relative AOAs of the sampling points are acquired, the method further includes: obtaining a relative AOA that satisfies a first condition:

after the relative AOAs of the sampling points are acquired, the method further includes:

In another embodiment, the position information of the sampling point is obtained through data of S1, the AOA of the antenna normal standard and the AOA of the due north direction standard of the sampling point are obtained through measurement reports, and the data of S1 further includes a first identifier of the sampling point and a first time, where the first time is a time when the sampling point is determined to be at the position information; the measurement report further comprises a second identifier of the sampling point and a second moment, wherein the second moment is the moment of determining an angle of arrival (AOA) of an antenna normal standard of the sampling point and an AOA of a due north direction standard;

In another embodiment, the step of obtaining the relative AOA of the sampling point specifically includes:

In another embodiment, the step of determining the azimuth angle of the antenna according to the position angle and the relative AOA specifically includes:

after the step of determining the azimuth angle of the antenna according to the included position angle and the relative AOA, the method further includes:

The electronic device provided in this embodiment may be configured to execute the program corresponding to the method in the foregoing method embodiment, and this implementation is not described again.

The electronic device provided by the embodiment at least has the following technical effects:

when the processor executes the program, the relative AOA irrelevant to the azimuth angle of the working parameter is obtained, the accuracy of the relative AOA is guaranteed, and therefore the accuracy of the output actual azimuth angle can be improved. And need not to measure on the spot, saved manpower, material resources and time cost greatly, also need not to rely on extra device, with low costs, easily popularization and application.

A further embodiment of the invention provides a storage medium having a computer program stored thereon, which when executed by a processor performs the steps of fig. 1.

In the storage medium provided in this embodiment, when the program is executed by the processor, the method in the foregoing method embodiment is implemented, and details of this implementation are not described again.

The storage medium provided by the embodiment guarantees the accuracy of the relative AOA by acquiring the relative AOA irrelevant to the azimuth of the working parameter, so that the accuracy of the output actual azimuth can be improved. And need not to measure on the spot, saved manpower, material resources and time cost greatly, also need not to rely on extra device, with low costs, easily popularization and application.

Yet another embodiment of the present invention discloses a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-mentioned method embodiments, for example, comprising:

Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.

Those skilled in the art will appreciate that the steps of the embodiments may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A method of determining an azimuth, the method comprising:

acquiring a relative AOA of a sampling point, wherein the AOA is an arrival angle, the relative AOA is an angle from a normal line of an antenna as an initial edge to the sampling point by clockwise rotation, the relative AOA is obtained according to an AOA of a due north direction standard, and the AOA of the due north direction standard is an angle from a base station to the sampling point by counterclockwise rotation with the due north direction as the initial edge according to an azimuth angle of a working parameter;

determining the azimuth angle of the antenna according to the position included angle and the relative AOA;

the step of obtaining the relative AOA of the sampling points specifically comprises the following steps:

if the intermediate AOA is judged to be smaller than the azimuth angle of the working parameter, the relative AOA is 360 degrees (the azimuth angle of the working parameter-the intermediate AOA).

2. The method of claim 1, wherein: after the relative AOAs of the sampling points are acquired, the method further includes: obtaining a relative AOA that satisfies a first condition:

3. The method of claim 1, wherein: after the relative AOAs of the sampling points are acquired, the method further includes:

4. The method of claim 1, wherein: the position information of the sampling point is obtained through data of an S1 port, the relative AOA of the sampling point and the AOA of the due north direction standard are obtained through a measurement report, the data of the S1 port further comprises a first identifier and a first moment of the sampling point, and the first moment is the moment of determining the sampling point in the position information; the measurement report further comprises a second identifier of the sampling point and a second moment, wherein the second moment is a moment for determining the relative AOA of the sampling point and the AOA of the due north direction standard;

5. The method according to claim 1, wherein the step of determining the azimuth angle of the antenna based on the position angle and the relative AOA specifically comprises:

if the sampling point is clockwise from the normal of the antenna, the actual azimuth angle is the angle of position + (360 ° -relative AOA).

6. The method of claim 1, wherein: after the step of determining the azimuth angle of the antenna according to the included position angle and the relative AOA, the method further includes:

7. An apparatus for determining an azimuth, the apparatus comprising:

the acquisition module is used for acquiring a relative AOA of a sampling point, wherein the AOA is an arrival angle, the relative AOA is an angle which is clockwise rotated to the sampling point by taking a normal line of an antenna as an initial edge, the relative AOA is obtained according to the AOA of the due north direction standard, and the AOA of the due north direction standard is an angle which is obtained by a base station through calculation according to an azimuth angle of an industrial parameter and is anticlockwise rotated to the sampling point by taking the due north direction as the initial edge;

the second determining module is used for determining the azimuth angle of the antenna according to the position included angle and the relative AOA;

the acquisition module is used for acquiring the relative AOA of the sampling point, and specifically comprises:

8. An electronic device comprising a memory, a processor, a bus, and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps of any of claims 1-6.

9. A storage medium having a computer program stored thereon, characterized in that: the program when executed by a processor implementing the steps of any of claims 1-6.