CN104540148A - Detection method and device for cross-neighborhood covering - Google Patents
Detection method and device for cross-neighborhood covering Download PDFInfo
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Abstract
The embodiment of the invention discloses a detection method and device for cross-neighborhood covering, and relates to the field of wireless communication. The method and device are used for detecting the cross-neighborhood covering conditions of all neighborhoods. The method includes the steps that configuration data and road test data are obtained, wherein the configuration data comprise the position and the antenna azimuth angle of a base station and switching parameters; according to the position and the antenna azimuth angle of the base station, the covering ranges of all the neighborhoods are determined; for any neighborhood, according to the switching parameters and the covering ranges of the neighborhoods, the covering ranges are expanded, so that second covering ranges of the neighborhoods are obtained; according to the road test data, the main service neighborhood of sampling points is determined, and according to the number of the sampling points with one neighborhood being the main service neighborhood, and the number of the sampling points, within or beyond the second covering ranges of the neighborhoods, with the neighborhood being the main service neighborhood, the cross-neighborhood covering range of the neighborhoods is determined and used for expressing the cross-neighborhood covering degree of the neighborhoods, so that cross-neighborhood covering is automatically detected.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for detecting handover coverage.
Background
In a mobile communication system, drive tests are an important means for evaluating the quality of a wireless network. In an actual network, due to reasons such as insufficient RF (Radio Frequency) optimization and unreasonable parameter setting, a phenomenon of handover coverage of a base station cell may be caused, and a cell with handover coverage may have a large influence on communication quality, even cause a network call drop. The prior art has no detection scheme aiming at the cross-area coverage, so that whether the cross-area coverage occurs in a base station cell cannot be judged.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting cross-region coverage, which are used for detecting the cross-region coverage degree of each cell.
A method of detecting handoff coverage, comprising:
acquiring configuration data and drive test data, wherein the configuration data comprises the position of a base station, an antenna azimuth angle and switching parameters;
determining a first coverage area of each cell of the base station according to the position of the base station and an antenna azimuth angle;
expanding the first coverage range according to the switching parameter and the first coverage range of the cell to obtain a second coverage range of the cell;
and determining a main service cell of sampling points according to the drive test data aiming at any cell in each cell of the base station, and determining the cross-over coverage rate of the cell according to the number of the sampling points taking the cell as the main service cell and the number of the sampling points falling into or not falling into a second coverage range of the cell in the sampling points taking the cell as the main service cell, wherein the cross-over coverage rate is used for expressing the cross-over coverage degree of the cell.
Therefore, the embodiment of the invention can automatically and reasonably determine the second coverage area closest to the actual coverage area of each cell of the base station according to the configuration data and the drive test data, can also automatically detect the cross-zone coverage condition of each cell, and evaluates the cross-zone coverage degree of each cell according to the cross-zone coverage condition of each cell, thereby solving the problem that the cross-zone coverage condition of each cell cannot be detected in the prior art.
Preferably, the determining a first coverage area of each cell of the base station according to the position of the base station and the antenna azimuth angle includes: taking the position of the base station as the position of a discrete point in a Thiessen polygon, and determining the coverage area of the base station in a mode of constructing an irregular Delaunay triangular network; and determining a first coverage range of a cell of the base station according to the antenna azimuth angle and the coverage range of the base station. Therefore, the embodiment of the invention can automatically determine the coverage range of each cell of the base station, thereby improving the accuracy of the cross-region coverage detection.
Preferably, the expanding the first coverage area according to the handover parameter and the first coverage area of the cell to obtain the second coverage area of the cell includes: according to a handover threshold value in the handover parameter and a first coverage area of the cell, extending a first reference point at the edge of the first coverage area of the cell outwards along the direction of the connection line between the base station position and the first reference point to obtain a second reference point, and extending the first coverage area of the cell according to the distance between the first reference point and the second reference point to obtain a second coverage area of the cell, so that a cell handover condition corresponding to the handover parameter is met when the terminal moves from the first reference point to the second reference point along a straight line direction; or, according to a handover threshold value and a duration value in the handover parameter, the first coverage area of the cell, and the moving speed of the terminal, a third reference point is obtained by extending the first reference point at the edge of the first coverage area of the cell outward along the connection line between the base station location and the first reference point, and the first coverage area of the cell is extended according to the distance between the first reference point and the third reference point to obtain a second coverage area of the cell, so that the terminal meets the cell handover condition corresponding to the handover parameter when moving from the first reference point to the third reference point along the linear direction according to the moving speed. Thus, the embodiment of the invention can expand the first coverage area by using the switching parameters in the cell switching condition, so that the second coverage area is closer to the actual coverage condition, thereby improving the accuracy of the cross-region coverage detection.
Preferably, the determining the handover coverage of the cell according to the number of the sampling points of the cell as the primary serving cell and the number of the sampling points falling or not falling within the second coverage range of the cell among the sampling points of the cell as the primary serving cell specifically includes: the cross-region coverage rate is the ratio of the number of sampling points which do not fall into the second coverage range of the cell in the sampling points of which the cell is the main service cell to the number of the sampling points of which the cell is the main service cell. Therefore, the embodiment of the invention can output the cross-area coverage rate in a proportional value mode, so that the cross-area coverage rate of each cell is more accurate and visual.
An apparatus for detecting handoff coverage, the apparatus comprising:
the system comprises a data acquisition unit, a data acquisition unit and a data transmission unit, wherein the data acquisition unit is used for acquiring configuration data and drive test data, and the configuration data comprises the position of a base station, an antenna azimuth angle and switching parameters;
a coverage determining unit, configured to determine a first coverage of each cell of the base station according to the position of the base station and an antenna azimuth; aiming at any cell in each cell of the base station, expanding the first coverage range according to the switching parameter and the first coverage range of the cell to obtain a second coverage range of the cell;
and the cross-region coverage detection unit is used for determining a main service cell of sampling points according to the drive test data, and determining the cross-region coverage rate of the cell according to the number of the sampling points taking the cell as the main service cell and the number of the sampling points falling into or not falling into the second coverage range of the cell in the sampling points taking the cell as the main service cell, wherein the cross-region coverage rate is used for expressing the cross-region coverage degree of the cell.
Therefore, the embodiment of the invention can automatically and reasonably determine the second coverage area closest to the actual coverage area of each cell of the base station according to the configuration data and the drive test data, can also automatically detect the cross-zone coverage condition of each cell, and evaluates the cross-zone coverage degree of each cell according to the cross-zone coverage condition of each cell, thereby solving the problem that the cross-zone coverage condition of each cell cannot be detected in the prior art.
Preferably, the coverage determining unit is specifically configured to determine the coverage of the base station by constructing an irregular Delaunay triangulation network, with the position of the base station as the position of one discrete point in the thiessen polygon; and determining a first coverage range of a cell of the base station according to the antenna azimuth angle and the coverage range of the base station. Therefore, the embodiment of the invention can automatically determine the coverage range of each cell of the base station, thereby improving the accuracy of the cross-region coverage detection.
Preferably, the coverage determining unit is specifically configured to, according to a handover threshold value in the handover parameter and the first coverage of the cell, obtain a second reference point by extending outward from a first reference point at an edge of the first coverage of the cell along a connection line between the base station location and the first reference point, and extend the first coverage of the cell according to a distance between the first reference point and the second reference point to obtain a second coverage of the cell, so that when the terminal moves from the first reference point to the second reference point along a straight line, a cell handover condition corresponding to the handover parameter is satisfied; or, according to a handover threshold value and a duration value in the handover parameter, the first coverage area of the cell, and the moving speed of the terminal, a third reference point is obtained by extending the first reference point at the edge of the first coverage area of the cell outward along the connection line between the base station location and the first reference point, and the first coverage area of the cell is extended according to the distance between the first reference point and the third reference point to obtain a second coverage area of the cell, so that the terminal meets the cell handover condition corresponding to the handover parameter when moving from the first reference point to the third reference point along the linear direction according to the moving speed. Thus, the embodiment of the invention can expand the first coverage area by using the switching parameters in the cell switching condition, so that the second coverage area is closer to the actual coverage condition, thereby improving the accuracy of the cross-region coverage detection.
Preferably, the handover coverage detection unit is specifically configured to determine the handover coverage as a ratio of the number of sampling points that do not fall within the second coverage range of the cell among the sampling points of the cell serving as the main serving cell to the number of sampling points of the cell serving as the main serving cell. Therefore, the embodiment of the invention can output the cross-area coverage rate in a proportional value mode, so that the cross-area coverage rate of each cell is more accurate and visual.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a flowchart illustrating a method for detecting a handover coverage according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a Delaunay triangulation network according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a Thiessen polygon configuration provided by an embodiment of the present invention;
fig. 4 is a schematic flowchart of determining a cell coverage area according to an embodiment of the present invention;
fig. 5 is a block diagram of a device for testing coverage according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the technical problems in the prior art, embodiments of the present invention provide a method and an apparatus for detecting a handover coverage. In the embodiment of the invention, the reasonable coverage range of each cell can be automatically calculated only by importing the configuration data and the drive test data, and then the cross-zone coverage rate of each cell can be accurately judged.
The embodiment of the invention can be suitable for various cellular communication systems, and is particularly used for realizing network optimization of a wireless communication system. In the embodiment of the present invention, the coverage areas of the base station and the cells of the base station may be determined by using a thieson polygon, a Delaunay triangulation network, or a variant thereof, and the like, and fig. 1 is a schematic flow diagram of a detection method for handover coverage provided in the embodiment of the present invention; based on the method provided by fig. 1, fig. 2 shows a schematic diagram of constructing a Delaunay triangulation network provided by the embodiment of the present invention, and fig. 3 shows a schematic diagram of constructing a tesian polygon provided by the embodiment of the present invention; as shown in fig. 1:
step 11: and acquiring configuration data and drive test data, wherein the configuration data comprises the position of a base station, an antenna azimuth angle and switching parameters.
In a specific implementation, the configuration data acquired in the embodiment of the present invention may include data such as position and antenna azimuth information of the base station, height information of the base station, and a switching parameter, and the drive test data acquired in the embodiment of the present invention may include at least moving speed information of a terminal performing drive test, position information of each sampling point, and the like.
It should be noted that, in the embodiment of the present invention, the configuration data and the drive test data may be obtained in step 11 first, and the configuration data and the drive test data may also be obtained in step 11 when needed.
Step 12: and determining a first coverage range of each cell of the base station according to the position of the base station and the antenna azimuth angle.
Preferably, in step 12, the position of the base station is taken as the position of a discrete point in the taison polygon, and the coverage area of the base station is determined by constructing an irregular Delaunay triangulation network; and determining a first coverage range of each cell of the base station according to the antenna azimuth angle and the coverage range of the base station.
In a specific implementation, the coverage area of each base station may be determined by constructing a thiessen polygon in the embodiment of the present invention, and a specific process may be as follows:
first, position information of a plurality of base stations is imported. As shown in fig. 2, each discrete point in fig. 2 is used to represent a location of one base station, the embodiment of the present invention is described by taking the location of n base stations as an example, and fig. 2 shows a schematic diagram of constructing a Delaunay triangulation network when n is 8.
Based on the Delaunay triangulation generated in fig. 3, fig. 4 is a schematic diagram of a part of the Delaunay triangulation, as shown in fig. 4. a, b, c … … f represent the vertices of each triangle; a, B, C … … F represent different triangles; o denotes the triangles A, B, C … … F each having o as the vertex. The number of the vertex of each triangle in the Delaunay triangulation network may be numbered according to a specific rule, for example, for any vertex o in the Delaunay triangulation network, all triangles with o as the vertex are found, the number of any triangle with o as the vertex is set as a, any vertex except o of the triangle a is set as a, and the other vertex of the triangle a is set as F, the number of the triangle with of as an edge is set as F, the other vertex of the triangle F is set as E, the number of the triangle with oe as an edge is set as E, and so on, the number of each triangle and the number of the vertex of each triangle may be recorded.
Then, the center of a circumscribed circle of each triangle in the Delaunay triangulation network is calculated, the centers of adjacent circumscribed circles are sequentially connected, a thiessen polygon is obtained, and the range of the thiessen polygon can be regarded as the coverage range of the base station (the base station with the position of the base station as a discrete point o). Furthermore, for the Thiessen polygon at the edge of the Delaunay triangulation network, a perpendicular bisector can be made to intersect with the graph corridor to form the Thiessen polygon together with the graph corridor.
After the coverage area of any one base station is obtained according to the above steps, the coverage area of each cell of the base station can be determined according to the antenna azimuth angle of the base station and the coverage area of the base station. Fig. 4 illustrates a process of determining a first coverage area of a cell according to an embodiment of the present invention, where fig. 4 illustrates a thiessen polygon with vertices a, b, c, d, e, and f, where a, b, c, d, e, and f are six vertices of the thiessen polygon, and oT is1、oT2、oT3Respectively the antenna direction of the base station. As shown in FIG. 4, the Thiessen polygon represents the coverage area of a base station, and then oT1And oT2Between the antenna azimuth, oT, of the base station2And oT3Is the antenna azimuth, oT, of the base station3And oT1Is the antenna azimuth of the base station. And finding an angular bisector of each antenna azimuth angle, and determining the first coverage range of each cell by using a method of using every two antenna azimuth angles as bisectors.
Step 13: and aiming at any cell in each cell of the base station, expanding the first coverage range according to the switching parameter and the first coverage range of the cell to obtain a second coverage range of the cell.
Preferably, in step 13, expanding the first coverage area according to the handover parameter and the first coverage area of the cell to obtain a second coverage area of the cell includes: according to a handover threshold value in the handover parameter and a first coverage area of the cell, extending a first reference point at the edge of the first coverage area of the cell outwards along the direction of the connection line between the base station position and the first reference point to obtain a second reference point, and extending the first coverage area of the cell according to the distance between the first reference point and the second reference point to obtain a second coverage area of the cell, so that a cell handover condition corresponding to the handover parameter is met when the terminal moves from the first reference point to the second reference point along a straight line direction; or, according to a handover threshold value and a duration value in the handover parameter, the first coverage area of the cell, and the moving speed of the terminal, a third reference point is obtained by extending the first reference point at the edge of the first coverage area of the cell outward along the connection line between the base station location and the first reference point, and the first coverage area of the cell is extended according to the distance between the first reference point and the third reference point to obtain a second coverage area of the cell, so that the terminal meets the cell handover condition corresponding to the handover parameter when moving from the first reference point to the third reference point along the linear direction according to the moving speed.
In specific implementation, the embodiment of the present invention can use a cell handover algorithm to perform two extensions on the first coverage of a cell to obtain a second coverage closest to the actual coverage, and the implementation process may be as follows:
taking a terminal performing drive test at any sampling point as an example, when the terminal is located at any position of an edge of a first coverage area of a cell, assuming that the terminal moves outward r +. DELTA.d kilometers along a connecting line direction of a base station position and a first reference point, the terminal satisfies a cell switching condition, and can expand the first coverage area of the cell outward by r +. DELTA.d kilometers to obtain a second coverage area of the cell.
First, a path loss is acquired. The embodiment of the invention takes a Cost231-hata propagation model as an example to estimate the path loss. The city (quasi-smooth ground) Cost231-hata propagation model is: 46.3+33.9log10(f)-13.82log10(hb)-α(hm)+(44.9-6.55log10(hb))·log10(R), wherein f is the frequency of the wireless signal, the numeric area of f is 0-2300 (Mhz), and hbHeight of base station, hbIs 30(m) to 200(m), R is the distance between the terminal and the base station antenna, and alpha (h)m) Correction factor for the terminal antenna height, α (h)m)＝(1.11log10(f)-0.7)·hm-(1.56log10(f)-0.8)，hmHeight of terminal, hmThe value of (c) is in the range of 1(m) to 10 (m).
It should be noted that, the present invention can also use a general propagation model corrected by a CW model, and its formula is: lu (dB) ═ 46.3+33.9log (f) -13.82log (h)b)-α(hm)+(44.9-6.55log(hb) Log (d) + Cm, where hbHeight of base station, hbHas a value range of 30(m) to 200(m), hmHeight of terminal, hmIs 1(m) to 10(m), d is the distance from the terminal to the base station antenna, and the unit is kilometer, alpha (h)m) Correction factor for the terminal antenna height, α (h)m)＝(1.11log(f)-0.7)·hm- (1.56log (f) -0.8), wherein f is the frequency of a wireless signal, the unit of the frequency is MHz, the value of the frequency is 2300, and Cm is a terrain correction factor (the value of a dense urban area is 3dB, the value of a general urban area is 0dB, and the value of a suburban area is 12.73 dB). The embodiment of the present invention may also estimate the path loss of each cell by using other models as long as the frequency band requirements of the embodiment of the present invention are satisfied.
After the path loss is obtained, the value of r is determined according to the path loss and the handover parameters in the cell handover conditions, and the calculation process may be as follows: and calculating the difference value Delta L of any two path losses according to the signal transmission model, and assuming that the Delta L is a switching threshold value RSCP _ DL _ COMP, namely in the process of the drive test, the path loss of the terminal performing the drive test moving outwards for r kilometers along the connecting line direction of the base station position and the first reference point is Delta L dB. Therefore, the temperature of the molten metal is controlled, <math>
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On the other hand, according to the handover parameters and the duration values in the cell handover conditions, the value of Δ d is determined, and the calculation process is as follows: the cell switching condition specifies that when the PCCPCH _ RSCP of a certain neighboring cell measured by the terminal is continuously higher than the PCCPCH _ RSCP of the cell by a specific threshold value RSCP _ DL _ COMP for a certain duration value T1, it is started to determine whether the pilot strength of the neighboring cell is higher than the specific threshold value. Therefore, Δ d in the embodiment of the present invention is related to the duration value T1 and the moving speed v of the terminal, and it can be considered that within the duration value T1, the terminal moves outward along the connection line of the base station position and the first reference point at the moving speed v, and when moving Δ d kilometer, the terminal satisfies the cell handover condition, that is, Δ d is v · T/1000/3600 (km).
Through the implementation process, it can be found that when the terminal moves outward by r + Δ d kilometers from the edge of the first coverage area of the cell along the connection direction of the base station position and the first reference point, the terminal performs cell switching, and the second coverage area obtained through the process not only considers the switching threshold value in the cell switching condition, but also considers the duration value, so that the second coverage area in the embodiment of the present invention is closer to the coverage area of the cell in the actual network.
It should be noted that the implementation process provided by the embodiment of the present invention is only a preferred implementation manner, and all other embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiment of the present invention belong to the protection scope of the present invention.
Step 14 to step 15: and determining a main service cell of sampling points according to the drive test data, and determining the cross-over coverage rate of the cell according to the number of the sampling points taking the cell as the main service cell and the number of the sampling points falling or not falling in a second coverage range of the cell in the sampling points taking the cell as the main service cell, wherein the cross-over coverage rate is used for expressing the cross-over coverage degree of the cell.
Preferably, in step 15, the handover coverage rate is a ratio of the number of sampling points that do not fall within the second coverage area of the cell to the number of sampling points of the primary serving cell.
In a specific implementation, the handover coverage in the embodiment of the present invention is defined as the number of sampling points that do not fall within the second coverage area of the cell, from among the sampling points of the cell serving as the primary serving cell, divided by the number of sampling points of the cell serving as the primary serving cell, multiplied by 100%.
Therefore, the embodiment of the invention can determine the cell coverage range which is closest to the actual situation by considering the cell switching condition, can automatically judge whether each cell has the phenomenon of cross-zone coverage, can further count the proportion of the cross-zone coverage of each cell, judges the cell with the most serious cross-zone coverage by sequencing the cross-zone coverage rate of each cell, and can obtain the optimal optimization suggestion, thereby realizing the automatic detection of the cross-zone coverage, improving the test accuracy, being beneficial to guiding an optimization engineer to quickly and accurately complete the basic optimization of the cellular network, and effectively reducing the cost of the optimization project.
Based on the same technical concept, an embodiment of the present invention provides a device for detecting a handover coverage, as shown in fig. 5, the device including:
a data obtaining unit 51, configured to obtain configuration data and drive test data, where the configuration data includes a position of a base station, an antenna azimuth, and a switching parameter;
a coverage determining unit 52, configured to determine a first coverage of a cell according to the location of the base station and an antenna azimuth; expanding the first coverage range according to the switching parameter and the first coverage range of the cell to obtain a second coverage range of the cell;
and a handover coverage detection unit 53, configured to determine a main serving cell of the sampling points according to the drive test data, and determine a handover coverage rate of the cell according to the number of the sampling points of the main serving cell, and the number of sampling points that fall or do not fall within a second coverage range of the cell among the sampling points of the main serving cell, where the handover coverage rate is used to indicate a handover coverage degree of the cell.
Preferably, the coverage determining unit 52 is specifically configured to determine the coverage of the base station by constructing an irregular Delaunay triangulation network, with the position of the base station as the position of one discrete point in the thiessen polygon; and determining a first coverage range of a cell of the base station according to the antenna azimuth angle and the coverage range of the base station.
Preferably, the coverage determining unit 52 is specifically configured to, according to a handover threshold value in the handover parameter and the first coverage of the cell, obtain a second reference point by extending outward from a first reference point at an edge of the first coverage of the cell along a connection line between the base station location and the first reference point, and extend the first coverage of the cell according to a distance between the first reference point and the second reference point to obtain a second coverage of the cell, so that when the terminal moves from the first reference point to the second reference point along a straight line direction, a cell handover condition corresponding to the handover parameter is satisfied; or, according to a handover threshold value and a duration value in the handover parameter, the first coverage area of the cell, and the moving speed of the terminal, a third reference point is obtained by extending the first reference point at the edge of the first coverage area of the cell outward along the connection line between the base station location and the first reference point, and the first coverage area of the cell is extended according to the distance between the first reference point and the third reference point to obtain a second coverage area of the cell, so that the terminal meets the cell handover condition corresponding to the handover parameter when moving from the first reference point to the third reference point along the linear direction according to the moving speed.
Preferably, the handover coverage detecting unit 53 is specifically configured to determine the handover coverage as a ratio of the number of sampling points that do not fall within the second coverage area of the cell among the sampling points of the cell serving as the primary serving cell to the number of sampling points of the cell serving as the primary serving cell.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A method for detecting a handover coverage, comprising:
acquiring configuration data and drive test data, wherein the configuration data comprises the position of a base station, an antenna azimuth angle and switching parameters;
determining a first coverage area of each cell of the base station according to the position of the base station and an antenna azimuth angle;
aiming at any cell in each cell of the base station, expanding the first coverage range according to the switching parameter and the first coverage range of the cell to obtain a second coverage range of the cell;
and determining a main service cell of sampling points according to the drive test data, and determining the cross-over coverage rate of the cell according to the number of the sampling points taking the cell as the main service cell and the number of the sampling points falling or not falling in a second coverage range of the cell in the sampling points taking the cell as the main service cell, wherein the cross-over coverage rate is used for expressing the cross-over coverage degree of the cell.
2. The method of claim 1, wherein said determining a first coverage area for each cell of the base station based on the location of the base station and an antenna azimuth comprises:
taking the position of the base station as the position of a discrete point in a Thiessen polygon, and determining the coverage area of the base station in a mode of constructing an irregular Delaunay triangular network;
and determining a first coverage range of each cell of the base station according to the antenna azimuth angle and the coverage range of the base station.
3. The method of claim 1, wherein the expanding the first coverage area according to the handover parameter and the first coverage area of the cell to obtain the second coverage area of the cell comprises:
according to a handover threshold value in the handover parameter and a first coverage area of the cell, extending a first reference point at the edge of the first coverage area of the cell outwards along the direction of the connection line between the base station position and the first reference point to obtain a second reference point, and extending the first coverage area of the cell according to the distance between the first reference point and the second reference point to obtain a second coverage area of the cell, so that a cell handover condition corresponding to the handover parameter is met when the terminal moves from the first reference point to the second reference point along a straight line direction; or,
and according to a handover threshold value and a duration value in the handover parameter, the first coverage area of the cell and the moving speed of the terminal, extending the first reference point at the edge of the first coverage area of the cell outwards along the direction of the connection line between the base station position and the first reference point to obtain a third reference point, and extending the first coverage area of the cell according to the distance between the first reference point and the third reference point to obtain a second coverage area of the cell, so that the terminal meets the cell handover condition corresponding to the handover parameter when moving from the first reference point to the third reference point along the linear direction according to the moving speed.
4. The method as claimed in claim 1, wherein the determining the handover coverage of the cell according to the number of the sampling points of the primary serving cell and the number of the sampling points falling or not falling within the second coverage range of the cell comprises:
the cross-region coverage rate is the ratio of the number of sampling points which do not fall into the second coverage range of the cell in the sampling points of which the cell is the main service cell to the number of the sampling points of which the cell is the main service cell.
5. An apparatus for detecting handoff coverage, the apparatus comprising:
the system comprises a data acquisition unit, a data acquisition unit and a data transmission unit, wherein the data acquisition unit is used for acquiring configuration data and drive test data, and the configuration data comprises the position of a base station, an antenna azimuth angle and switching parameters;
a coverage determining unit, configured to determine a first coverage of each cell of the base station according to the position of the base station and an antenna azimuth; aiming at any cell in each cell of the base station, expanding the first coverage range according to the switching parameter and the first coverage range of the cell to obtain a second coverage range of the cell;
and the cross-region coverage detection unit is used for determining a main service cell of sampling points according to the drive test data, and determining the cross-region coverage rate of the cell according to the number of the sampling points taking the cell as the main service cell and the number of the sampling points falling into or not falling into the second coverage range of the cell in the sampling points taking the cell as the main service cell, wherein the cross-region coverage rate is used for expressing the cross-region coverage degree of the cell.
6. The apparatus of claim 5, wherein the coverage determination unit is specifically configured to,
taking the position of the base station as the position of a discrete point in a Thiessen polygon, and determining the coverage area of the base station in a mode of constructing an irregular Delaunay triangular network;
and determining a first coverage range of each cell of the base station according to the antenna azimuth angle and the coverage range of the base station.
7. The apparatus of claim 5, wherein the coverage determination unit is specifically configured to,
according to a handover threshold value in the handover parameter and a first coverage area of the cell, extending a first reference point at the edge of the first coverage area of the cell outwards along the direction of the connection line between the base station position and the first reference point to obtain a second reference point, and extending the first coverage area of the cell according to the distance between the first reference point and the second reference point to obtain a second coverage area of the cell, so that a cell handover condition corresponding to the handover parameter is met when the terminal moves from the first reference point to the second reference point along a straight line direction; or, according to a handover threshold value and a duration value in the handover parameter, the first coverage area of the cell, and the moving speed of the terminal, a third reference point is obtained by extending the first reference point at the edge of the first coverage area of the cell outward along the connection line between the base station location and the first reference point, and the first coverage area of the cell is extended according to the distance between the first reference point and the third reference point to obtain a second coverage area of the cell, so that the terminal meets the cell handover condition corresponding to the handover parameter when moving from the first reference point to the third reference point along the linear direction according to the moving speed.
8. The apparatus of claim 5, wherein said handover coverage detection unit is specifically configured to,
the cross-region coverage rate is the ratio of the number of sampling points which do not fall into the second coverage range of the cell in the sampling points of which the cell is the main service cell to the number of the sampling points of which the cell is the main service cell.
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