Base station coverage information processing method, device, equipment, medium and product

Abstract

The invention discloses a base station coverage information processing method and device, equipment, a medium and a product, and the method comprises the steps: determining a target region and a target base station associated with the target region, carrying out the network coverage analysis of the target base station, calculating a dynamic correction base station coverage distance parameter, and carrying out the network coverage analysis of the target base station. Correcting the theoretical coverage distance of the target base station to obtain the actual coverage distance of the target base station, calculating the actual wireless coverage area of the target base station in the preset coverage direction according to the actual coverage distance, and determining the target area of the target base station according to the relation between the actual wireless coverage area and the target area. And determining a target wireless coverage area of the target base station in the target area. By adopting the method and the device, the wireless coverage area of the base station in the target area can be accurately calculated, and accurate information service can be provided for customers.

Description

Technical Field

[0001] The present invention relates to the field of big data, and in particular to a base station coverage information processing method, device, equipment, medium and product. Background Art

[0002] At present, accurate calculation of base station coverage of designated target areas such as ecological protection red lines, scenic spots, residential areas, exhibition halls, museums, etc. can provide personalized information services to precise customer groups at precise times and locations.

[0003] The traditional calculation scheme for the association between a base station and a target area is as follows: the base station location coordinates are used as the origin, and the proposed coverage distance is used as the radius to construct the wireless coverage area of ​​the base station. The overlap between the wireless coverage area and the target area is then calculated to obtain the wireless coverage area of ​​the base station within the target area.

[0004] However, since the antennas of outdoor base stations are all directional antennas, the base station sectors under each base station cover users in different directions. The traditional algorithm calculation method ignores the directionality of antenna coverage, resulting in inaccurate calculation results of the wireless coverage area of ​​the base station. It is difficult to accurately obtain the effective coverage area of ​​the base station in the target area, making it difficult to provide accurate information services to customers. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a base station coverage information processing method, device, equipment, medium and product, which can accurately calculate the wireless coverage area of ​​the base station in the target area, which is conducive to providing accurate information services to customers.

[0006] To achieve the above object, an embodiment of the present invention provides a base station coverage information processing method, including:

[0007] Determining a target area and a target base station associated with the target area;

[0008] Performing base station network coverage analysis on the target base station, calculating a dynamically corrected base station coverage distance parameter, and correcting the theoretical coverage distance of the target base station to obtain an actual coverage distance of the target base station;

[0009] Calculating the actual wireless coverage area of ​​the target base station at the preset coverage location according to the actual coverage distance;

[0010] A target wireless coverage area of ​​the target base station within the target area is determined according to the relationship between the actual wireless coverage area and the target area.

[0011] As an improvement of the above solution, performing base station network coverage analysis on the target base station, calculating a dynamically corrected base station coverage distance parameter, and correcting the theoretical coverage distance of the target base station to obtain the actual coverage distance of the target base station includes:

[0012] According to the wireless coverage parameters of the target base station, a base station network coverage analysis is performed using a wireless network analysis algorithm to calculate a theoretical coverage distance of the target base station;

[0013] Calculating a dynamically corrected base station coverage distance parameter of the target base station according to the signaling data of the target base station, the reference signal received power reported by the connected user terminal, and the theoretical coverage distance;

[0014] The theoretical coverage distance is corrected according to the dynamically corrected base station coverage distance parameter to obtain the actual coverage distance of the target base station.

[0015] As an improvement of the above solution, the calculating the actual wireless coverage area of ​​the target base station at the preset coverage position according to the actual coverage distance includes:

[0016] When a preset condition is met, it is determined that there is an obstacle in the preset coverage direction of the target base station; wherein the preset condition is that the distance from the user terminal to the base station is less than the preset distance, and the reference signal received power reported by the user terminal is less than the preset standard value, and the preset distance is less than the actual coverage distance;

[0017] Acquire the location information of the obstacle, and calculate the effective coverage area of ​​the target base station in the coverage direction according to the location information of the obstacle and the position of the base station;

[0018] Calculate the area of ​​the diffraction signal coverage area formed by the target base station behind the building;

[0019] The actual wireless coverage area of ​​the target base station in the preset coverage direction is obtained according to the difference between the effective coverage area and the area covered by the diffraction signal.

[0020] As an improvement of the above solution, the calculating the area of ​​the diffraction signal coverage area formed by the target base station behind the building shielding includes:

[0021] Calculating the signal intensity of the area covered by the diffraction signal according to the diffraction coefficient of the area covered by the diffraction signal;

[0022] The area covered by the diffraction signal is calculated according to the signal intensity.

[0023] As an improvement of the above solution, determining the target wireless coverage area of ​​the target base station within the target area according to the relationship between the actual wireless coverage area and the target area includes:

[0024] Determine an overlapping relationship between each of the actual wireless coverage areas and the target area; wherein the overlapping relationship is a first overlapping relationship in which the target area includes the actual wireless coverage area, or a second overlapping relationship in which the target area partially intersects with the actual wireless coverage area;

[0025] When the first overlapping relationship is satisfied, obtaining a target wireless coverage area of ​​the target base station within the target area according to the actual wireless coverage area;

[0026] When the second overlapping relationship is satisfied, the intersection area of ​​the actual wireless coverage area and the target area is divided into several regular figures by introducing several horizontal and vertical coordinate axes, and the area of ​​each regular figure is calculated by a differential algorithm, and the area of ​​the intersection area is obtained by adding the areas of all the regular figures to obtain the target wireless coverage area of ​​the target base station within the target area.

[0027] As an improvement of the above solution, the determining of the overlapping relationship between each of the actual wireless coverage areas and the target area includes:

[0028] Splitting the surface of the actual wireless coverage area into a plurality of points;

[0029] Determine whether all points are within the target area;

[0030] If yes, the actual wireless coverage area and the target area satisfy the first overlapping relationship;

[0031] If not, the actual wireless coverage area and the target area satisfy the second overlapping relationship.

[0032] As an improvement of the above solution, the method further includes:

[0033] When the second overlapping relationship is satisfied, calculating an area overlap rate according to the intersection area and the actual wireless coverage area;

[0034] The target base stations whose overlap rate is less than or equal to the preset overlap rate threshold are eliminated to obtain updated target base stations.

[0035] As an improvement of the above solution, the determining a target base station associated with the target area includes:

[0036] Obtain several base stations to be tested;

[0037] Taking the position of the base station to be tested as the origin and the preset coverage distance as the radius, constructing the initial wireless coverage area of ​​each base station to be tested;

[0038] Taking the base station to be tested whose initial wireless coverage area overlaps with the target area as the first base station;

[0039] Scoring the coverage quality of each of the first base stations according to the wireless coverage parameters of each of the first base stations and the preset weight thereof to obtain a first scoring result of each of the first base stations, and selecting a second base station according to the first scoring result;

[0040] Acquire base station passenger flow data of each second base station in the target area;

[0041] A pedestrian flow score is performed on each of the second base stations according to the base station pedestrian flow data to obtain a second scoring result of each of the second base stations, and a target base station is screened according to the second scoring result.

[0042] As an improvement of the above solution, the method further includes:

[0043] The personalized information is pushed to user terminals in the target wireless coverage area through the target base station.

[0044] As an improvement of the above solution, the pushing of personalized information to user terminals in the target wireless coverage area through the target base station includes:

[0045] Acquire base station passenger flow data in the target wireless coverage area;

[0046] Determining the population type according to the base station crowd flow data;

[0047] Determine the corresponding preset personalized information content and push frequency according to the population type;

[0048] The corresponding personalized information content is pushed to user terminals of different population types in the target wireless coverage area according to the push frequency through the target base station.

[0049] The embodiment of the present invention further provides a base station coverage information processing device, including:

[0050] A target base station determination module, used to determine a target area and a target base station associated with the target area;

[0051] The actual coverage distance calculation module is used to perform base station network coverage analysis on the target base station, calculate the dynamic correction base station coverage distance parameter, correct the theoretical coverage distance of the target base station, and obtain the actual coverage distance of the target base station;

[0052] An actual wireless coverage area calculation module, used to calculate the actual wireless coverage area of ​​the target base station in a preset coverage direction according to the actual coverage distance;

[0053] The target wireless coverage area determination module is used to determine the target wireless coverage area of ​​the target base station within the target area according to the relationship between the actual wireless coverage area and the target area.

[0054] An embodiment of the present invention also provides a base station coverage information processing device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the base station coverage information processing method as described in any one of the above items is implemented.

[0055] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the base station coverage information processing method as described in any one of the above.

[0056] An embodiment of the present invention further provides a computer program product, which includes a computer program or a computer instruction. When the computer program or the computer instruction is executed by a processor, the base station coverage information processing method as described in any one of the above is implemented.

[0057] Compared with the prior art, the base station coverage information processing method, device, equipment, medium and product disclosed in the present invention take into account the coverage orientation of the wireless coverage area of ​​each base station, perform base station network coverage analysis on the target base station, calculate the dynamically corrected base station coverage distance parameter, correct the theoretical coverage distance of the target base station, and obtain the actual coverage distance of the target base station, thereby calculating the actual wireless coverage area of ​​the target base station in the preset coverage orientation, improving the calculation accuracy of the target wireless coverage area of ​​the target base station in the target area, and improving the calculation accuracy of the association relationship between the target base station and the target area, which is conducive to using the association relationship to provide customers with accurate information services. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 It is a flowchart of a base station coverage information processing method provided by an embodiment of the present invention;

[0059] Figure 2 is a schematic diagram of the principle of calculating the actual wireless coverage area in an embodiment of the present invention;

[0060] Figure 3 is a schematic diagram of the principle of calculating the three-dimensional range of the actual wireless coverage area in an embodiment of the present invention;

[0061] Figure 4 is a schematic diagram of the principle of the overlapping relationship between the actual wireless coverage area and the target area in an embodiment of the present invention;

[0062] Figure 5 It is a schematic diagram of the principle of determining the overlapping relationship between the actual wireless coverage area and the target area in an embodiment of the present invention;

[0063] Figure 6 is a schematic diagram of the principle of calculating the intersection area in an embodiment of the present invention;

[0064] Figure 7 It is a schematic diagram of the principle of the wireless coverage area of ​​a base station in a target area in the prior art;

[0065] Figure 8 is a schematic diagram of the actual wireless coverage area of ​​a base station in a target area according to an embodiment of the present invention;

[0066] Fig. 9 It is a structural schematic diagram of a base station coverage information processing device provided by an embodiment of the present invention;

[0067] Fig.10 It is a structural diagram of a base station coverage information processing device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0070] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0071] See also Figure 1 , is a flow chart of a method for processing base station coverage information provided by an embodiment of the present invention. The embodiment of the present invention provides a method for processing base station coverage information, which is specifically implemented through steps S11 to S14:

[0072] S11, determining a target area and a target base station associated with the target area;

[0073] S12, performing base station network coverage analysis on the target base station, calculating a dynamically corrected base station coverage distance parameter, and correcting a theoretical coverage distance of the target base station to obtain an actual coverage distance of the target base station;

[0074] S13. Calculate the actual wireless coverage area of ​​the target base station in the preset coverage direction according to the actual coverage distance;

[0075] S14: Determine a target wireless coverage area of ​​the target base station within the target area according to the relationship between the actual wireless coverage area and the target area.

[0076] The embodiments of the present invention mainly realize the accurate calculation of the association between the target area and the wireless coverage area of ​​the base station, improve the accuracy of identifying the wireless coverage area of ​​the base station in the target area, and support the business of providing accurate information services to customers.

[0077] It should be noted that the target area is a pre-set area range, which is applicable to scenes such as ecological protection red lines, scenic spots, residential areas, exhibition halls, and museums.

[0078] In the embodiment of the present invention, a target area and a target base station associated with the target area are first determined, that is, a base station whose wireless coverage area may overlap with the target area, which can be roughly determined using the existing technology.

[0079] As an example, optionally, the determining a target base station associated with the target area includes:

[0080] Obtain several base stations to be tested;

[0081] Taking the position of the base station to be tested as the origin and the preset coverage distance as the radius, constructing the initial wireless coverage area of ​​each base station to be tested;

[0082] The base station to be tested whose initial wireless coverage area overlaps with the target area is taken as the target base station.

[0083] Taking the target area as the ecological protection red line area as an example, the engineering parameter data information of base stations in the whole province is extracted, and all macro stations are analyzed as base stations to be tested. The location coordinates of the base station to be tested are taken as the origin, and a circle is drawn with the proposed coverage distance of the base station as the radius to form the initial wireless coverage area of ​​the base station to be tested. The overlap calculation of the initial wireless coverage area and the ecological protection red line area is then performed. As long as there is an overlapping area between the initial wireless coverage area of ​​the base station and the ecological protection red line area, it is defined as the target base station.

[0084] It can be understood that the above scenarios are only examples, and in actual applications, other conditions may be set to determine the target base station associated with the target area, which is not specifically limited here.

[0085] Furthermore, the existing method for calculating the coverage area of ​​a base station is to use the coordinates of the base station location as the origin and draw a circle with the proposed coverage distance of the base station as the radius to form the wireless coverage area of ​​the base station. However, in actual network coverage, the wireless signal coverage is extremely complex due to the influence of indicators such as building shielding and base station transmission power. In an embodiment of the present invention, by performing a base station network coverage analysis on the target base station and considering the antenna direction of the base station, that is, the coverage direction, the actual wireless coverage area of ​​the target base station is accurately calculated.

[0086] Specifically, the theoretical coverage distance Ra of the target base station is first determined, and then the dynamically corrected base station coverage distance parameter δ is introduced. Based on the theoretical coverage distance Ra and the dynamically corrected base station coverage distance parameter δ, the actual coverage distance R of the base station is obtained. According to the actual coverage distance R, the actual wireless coverage area of ​​the target base station in the preset coverage direction is calculated.

[0087] After obtaining the actual wireless coverage area of ​​the target base station in the preset coverage direction, the overlap relationship between the actual wireless coverage area and the target area is calculated to obtain the association relationship between the base station and the target area, that is, the target wireless coverage area of ​​the target base station within the target area.

[0088] By adopting the technical means of the embodiments of the present invention, the coverage orientation of the wireless coverage area of ​​each base station is taken into consideration. By performing base station network coverage analysis on the target base station, the base station coverage distance parameter is calculated and dynamically corrected, and the theoretical coverage distance of the target base station is corrected to obtain the actual coverage distance of the target base station, thereby calculating the actual wireless coverage area of ​​the target base station in the preset coverage orientation, thereby improving the calculation accuracy of the target wireless coverage area of ​​the target base station in the target area, and improving the calculation accuracy of the association relationship between the target base station and the target area, which is conducive to using the association relationship to provide customers with accurate information services.

[0089] As a preferred implementation, the embodiment of the present invention is further implemented on the basis of the above embodiment, and the technical means for determining the target base station is further optimized. The determining of the target base station associated with the target area includes steps S111 to S115:

[0090] S111, obtaining several base stations to be tested;

[0091] S112, taking the position of the base station to be tested as the origin and the preset coverage distance as the radius, constructing an initial wireless coverage area of ​​each base station to be tested;

[0092] S113, taking the base station to be tested whose initial wireless coverage area overlaps with the target area as the first base station;

[0093] S114. Score the coverage quality of each first base station according to the wireless coverage parameter of each first base station and its preset weight, obtain a first scoring result of each first base station, and select a second base station according to the first scoring result;

[0094] S115. Use the second base station as the target base station.

[0095] In an embodiment of the present invention, the base stations in the area to be tested are first queried to determine a number of base stations to be tested. The position coordinates of the base station to be tested are taken as the origin, and a circle is drawn with the proposed coverage distance of the base station as the radius to form the initial wireless coverage area of ​​the base station to be tested. Then, the overlap calculation between the initial wireless coverage area and the target area is performed. As long as there is an overlap area between the initial wireless coverage area of ​​the base station and the target area, it is defined as the first base station and enters the subsequent screening.

[0096] The wireless coverage parameters of the first base station are obtained, including base station location, antenna height, antenna azimuth, base station transmission power, bandwidth, user capacity and other related data. A weight is assigned to each parameter according to the importance of different parameters, and the sum of the weights should be 1.

[0097] For example, the wireless coverage parameters and weights are: signal strength: 0.4, base station location (divided into urban and non-urban areas): 0.35, bandwidth: 0.15, delay: 0.05, and user capacity: 0.05.

[0098] The first base station is scored for coverage quality in a weighted manner using the wireless coverage parameters and weights of the base station to obtain a first scoring result of the first base station. The larger the first scoring result, the better the coverage quality of the first base station. All first scoring results are sorted from large to small, and the first base stations with the top 90% scores are taken as second base stations, and the number is N1.

[0099] After the second base station is determined, the second base station may be directly used as a target base station.

[0100] More preferably, in order to further improve the accuracy of determining the target base station, in step S114, that is, after determining to obtain the second base station, steps S116 to S117 are further included:

[0101] S116, obtaining base station passenger flow data of each second base station in the target area;

[0102] S117: Score the passenger flow of each second base station according to the base station passenger flow data to obtain a second scoring result of each second base station, and select a target base station according to the second scoring result.

[0103] Specifically, by obtaining the base station data of the second base station, based on the base station event drive, the user's continuous residence behavior in the target area is recorded in real time, the drift connection situation is identified, the pedestrian flow data of the second base station is counted, and invalid base stations with no pedestrian flow for a long time are eliminated from the second base station.

[0104] A set of scoring rules for human traffic data in the base station coverage area is established, and a weight is assigned to each human traffic data parameter. The sum of the weights should be 1. The human traffic data parameters and scoring ratios are: number of permanent residents: 0.3, age of permanent residents: 0.1, number of floating population: 0.35, frequency of floating population in and out: 0.15, and total user capacity: 0.1. Here, the human traffic data of base stations in the past 90 days are counted, and the base station elimination threshold K is constructed. Base stations with scores lower than K are eliminated. In this round of precision improvement, the number of base stations eliminated is B1. Finally, the target base stations are screened out from the N1 second base stations obtained, and the number is N2=N1-B1, which further improves the accurate identification of effective target base stations in the target area.

[0105] By adopting the technical means of the embodiments of the present invention, after screening out base stations that overlap with the target area based on the roughly calculated initial wireless coverage area of ​​the base station, the embodiments of the present invention further eliminate invalid base stations in combination with the coverage quality of the base stations and the pedestrian flow data, thereby improving the determination accuracy of the target base stations associated with the target area and improving the accurate identification of valid base stations in the target area.

[0106] As a preferred implementation, the embodiment of the present invention is further implemented on the basis of any of the above embodiments, and the technical means for calculating the actual coverage distance and the actual wireless coverage area of ​​the target base station are further optimized. Step S12, that is, performing base station network coverage analysis on the target base station, calculating the dynamically corrected base station coverage distance parameter, correcting the theoretical coverage distance of the target base station, and obtaining the actual coverage distance of the target base station, includes steps S121 to S123:

[0107] S121. Perform base station network coverage analysis using a wireless network analysis algorithm according to the wireless coverage parameters of the target base station, and calculate a theoretical coverage distance of the target base station;

[0108] S122. Calculate a dynamically corrected base station coverage distance parameter of the target base station according to the signaling data of the target base station, the reference signal received power reported by the connected user terminal, and the theoretical coverage distance;

[0109] S123. Correct the theoretical coverage distance according to the dynamically corrected base station coverage distance parameter to obtain an actual coverage distance of the target base station.

[0110] In the embodiment of the present invention, the wireless coverage parameters of the target base station are first collected, and the wireless coverage parameters include comprehensive data indicators such as base station location, antenna height, antenna azimuth, base station transmission power, antenna lobe power, etc. The base station network coverage analysis is performed through the wireless network analysis algorithm, and the theoretical coverage distance Ra of the base station is calculated through the antenna height, azimuth, and pitch angle of the base station. The calculation formula is as follows:

[0111]

[0112] Where H is the antenna height, pa is the downtilt angle, and HPW is the antenna beam power.

[0113] In actual network coverage, the wireless signal will be attenuated by building obstruction and terrain, which will eventually affect the coverage distance of the base station sector. The embodiment of the present invention adds a dynamic correction base station coverage distance parameter δ, by tracking the signaling data TA of the base station and the level value RSRP (Reference Signal Receiving Power) reported by the user terminal, and optimizing and adjusting the calculation formula of δ through massive data measurement.

[0114] When Ra = TA, the calculation formula of δ is as follows:

[0115]

[0116] Based on the theoretical coverage distance Ra and the dynamically corrected base station coverage distance parameter δ, the actual coverage distance R of the base station is obtained. The calculation formula is as follows:

[0117]

[0118] Preferably, see Figure 2 , is a schematic diagram of the principle of calculating the actual wireless coverage area in an embodiment of the present invention, step S13, that is, calculating the actual wireless coverage area of ​​the target base station in the preset coverage direction according to the actual coverage distance, includes steps S131 to S134:

[0119] S131. When a preset condition is met, determine that there is an obstacle in the preset coverage direction of the target base station; wherein the preset condition is that the distance from the user terminal to the base station is less than a preset distance, and the reference signal received power reported by the user terminal is less than a preset standard value, and the preset distance is less than the actual coverage distance;

[0120] S132, obtaining the location information of the obstacle, and calculating the effective coverage area of ​​the target base station in the coverage direction according to the location information of the obstacle and the position of the base station;

[0121] S133, calculating the area of ​​the diffraction signal coverage area formed by the target base station behind the building;

[0122] S134. Obtain the actual wireless coverage area of ​​the target base station in the preset coverage direction according to the difference between the effective coverage area and the area covered by the diffraction signal.

[0123] In the embodiment of the present invention, while considering that the network coverage is blocked by buildings and the terrain affects the base station coverage distance, the influence of the coverage direction of the base station wireless coverage area must also be considered. Since the antennas of outdoor base stations are all directional antennas, the wireless coverage area formed by each base station is a sector with different coverage directions. If there is a building or terrain blocking the area close to the side lobe of the base station sector, then the user behind the building cannot guarantee the level quality of the cell behind the building.

[0124] In the embodiment of the present invention, it is assumed that the base station sector coverage center angle is a, and the signaling data TA of the base station and the level value RSRP reported by the user terminal are tracked. After the calculation of the actual coverage distance R is completed, a large amount of data is measured by tracking the signaling data. When it is determined that the preset conditions are met, that is, the distance from the user terminal to the base station is less than the preset distance, such as the position of 2 / 3R, and there is a mobile terminal reporting level value RSRP less than the standard value, such as -95dBm, it can be confirmed according to the set algorithm that there are obvious buildings or landforms blocking the distance from the location to the base station. Figure 2 As shown in the figure, at the angle boundary of the obstacle, there are points H1 and H2 where the mobile phone level quality deteriorates, and point O is the base station location. In view of this situation, the calculation of the impact of poor quality results is carried out. First, the angle a1 of the affected side lobe of the base station is calculated. After calculation, a1 and the effective coverage area area of ​​the base station at the a1 position are constructed. The calculation formula is as follows:

[0125]

[0126]

[0127] Among them, H1 o 、H2 o , O o are the longitudes of H1, H1 and O respectively, H1 a 、H2 a , O a are the latitudes of H1, H1 and O respectively.

[0128] Further considering that the base station signal has diffraction characteristics, a base station signal diffraction coverage area will be formed behind the building shielding. Therefore, it is also necessary to subtract the diffraction signal coverage area to obtain the actual wireless coverage area.

[0129] Preferably, the step S133 of calculating the area of ​​the diffraction signal coverage area formed by the target base station behind the building shielding includes:

[0130] Calculating the signal intensity of the area covered by the diffraction signal according to the diffraction coefficient of the area covered by the diffraction signal;

[0131] The area covered by the diffraction signal is calculated according to the signal intensity.

[0132] See also Figure 2 , the diffraction signal coverage area pg1 is formed by the boundary points H1, C1, and C2, and the diffraction signal coverage area pg2 is formed by the boundary points H2, C3, and C4. Because different buildings have different diffraction coefficients γ(x0, y0), for example, the diffraction coefficient of an ordinary residential building is lower than that of a large building such as a museum. The size of the diffraction coefficient will directly affect the signal strength and coverage area of ​​the diffraction coverage areas pg1 and pg2. In the embodiment of the present invention, the calculation formula for the signal strength in the diffraction signal coverage areas pg1 and pg2 is constructed as follows:

[0133]

[0134] Among them, H0 is the maximum amplitude of the signal, S is the distance from any point in pg1 to H1, and γ(x0,y0) is the diffraction coefficient.

[0135] After completing the calculation of the signal intensity in the diffraction signal coverage areas pg1 and pg2, the calculation formula for the area of ​​the coverage areas pg1 and pg2 is further constructed. The intersection points C2 and C3 of the coverage areas pg1 and pg2 and the boundary arcs move on the boundary arcs under the influence of the calculation results of the signal intensity P(x0, y0), which will cause the coverage areas pg1 and pg2 to expand or shrink. Based on P(x0, y0), the boundary calculation formulas of H1C2 and H2C3 in the coverage areas pg1 and pg2 are further constructed as follows:

[0136]

[0137] After completing the calculation of the diffraction signal coverage area, not only the calculation of the diffraction coverage area of ​​a single building can be realized, but also the calculation of the diffraction coverage area behind the gap between two buildings can be realized.

[0138] Furthermore, the actual wireless coverage area of ​​the base station is obtained by subtracting the diffraction signal coverage area from the effective coverage area area of ​​the preset coverage orientation of the target base station.

[0139] See also Figure 3 , is a schematic diagram of the principle of calculating the three-dimensional range of the actual wireless coverage area in an embodiment of the present invention. In the actual wireless coverage area, the buffer zone is calculated with the base station longitude and latitude coordinate point as the center of the circle. The generation algorithm of the layer buffer zone mainly adopts the fitting method, which is to divide the central angle of the circle into several equal parts and replace the arc with chords of equal length. A point A (ax, ay) on the arc of a known radius R (buffer distance) is used to approximate the buffer circle in a clockwise direction with n equally spaced discrete points, that is, the equally spaced central angle a = 360° / n. Suppose the direction angle of OA is known to be β, and the next point in the clockwise direction of A is B (bx, by), and its coordinate calculation formula is:

[0140]

[0141] Based on the above calculation method of base station sector coverage range, the calculation of the base station coverage layer is completed.

[0142] By adopting the technical means of the embodiment of the present invention, a spatial data analysis model is constructed, and a buffer algorithm, a network analysis algorithm and an interpolation algorithm are integrated to customize the dynamic correction base station coverage distance parameter δ. By tracking the signaling data TA of the base station and the level value RSRP reported by the user's mobile phone, the dynamic correction base station coverage distance parameter is calculated based on massive data, which is used to correct the actual coverage distance of the base station, thereby improving the accuracy of the actual coverage distance of the base station, and then calculating the actual wireless coverage area of ​​the base station with high precision, which is conducive to the subsequent accurate determination of the correlation between the base station coverage area and the target area.

[0143] As a preferred implementation, the embodiment of the present invention is further implemented on the basis of any of the above embodiments, and the calculation means of the target wireless coverage area of ​​the target base station in the target area is further optimized. Step S14, that is, determining the target wireless coverage area of ​​the target base station in the target area according to the relationship between the actual wireless coverage area and the target area, includes steps S141 to S143:

[0144] S141, determining an overlapping relationship between each of the actual wireless coverage areas and the target area; wherein the overlapping relationship is a first overlapping relationship in which the target area includes the actual wireless coverage area, or a second overlapping relationship in which the target area partially intersects with the actual wireless coverage area;

[0145] S142: when the first overlapping relationship is satisfied, obtaining a target wireless coverage area of ​​the target base station within the target area according to the actual wireless coverage area;

[0146] S143. When the second overlapping relationship is satisfied, the intersection area of ​​the actual wireless coverage area and the target area is divided into a plurality of regular figures by introducing a plurality of horizontal and vertical coordinate axes, and the area of ​​each of the regular figures is calculated by a differential algorithm, and the area of ​​the intersection area is obtained by adding the areas of all the regular figures, thereby obtaining the target wireless coverage area of ​​the target base station within the target area.

[0147] In the embodiment of the present invention, the overlapping coverage area of ​​the actual wireless coverage area of ​​the base station and the target area is divided into two categories, one is the regular area calculation in which the actual wireless coverage area of ​​the base station is completely included in the target area, and the other is the irregular area calculation in which the actual wireless coverage area of ​​the base station intersects with the target area. Figure 4 , is a schematic diagram of the principle of the overlapping relationship between the actual wireless coverage area and the target area in an embodiment of the present invention. The overlapping coverage of the actual wireless coverage area O3 of the base station and the target area RL1 belongs to the regular area calculation, and the overlapping coverage of the actual wireless coverage area O2 and the target area RL1 belongs to the irregular area calculation.

[0148] First, use GIS tools to convert the target area layer and the base station layer to the same coordinate system. The embodiment of the present invention uses a self-developed spatial coupling algorithm to accurately calculate the overlap between the base station wireless coverage area and the target area, thereby obtaining a more scientific and accurate relationship judgment between the two. The irregular overlap area is calculated by adding several horizontal and vertical coordinate axes on the map to split the irregular area into regular areas.

[0149] Preferably, step S141, i.e., determining the overlapping relationship between each of the actual wireless coverage areas and the target area, includes:

[0150] Splitting the surface of the actual wireless coverage area into a plurality of points;

[0151] Determine whether all points are within the target area;

[0152] If yes, the actual wireless coverage area and the target area satisfy the first overlapping relationship;

[0153] If not, the actual wireless coverage area and the target area satisfy the second overlapping relationship.

[0154] Specifically, first determine whether the actual wireless coverage area of ​​the base station is within the target area. Based on the autonomous analysis algorithm, split the surface of the actual wireless coverage area of ​​the base station into several points to determine whether all the points are within the target area. If all the points are within the target area, the actual wireless coverage area of ​​the base station is completely contained in the target area.

[0155] like Figure 5 As shown, Figure 5 It is a schematic diagram of the principle of determining the overlapping relationship between the actual wireless coverage area and the target area in an embodiment of the present invention, and the positions of points O1, O2, O3 and the target RL1 are calculated respectively. In the calculation process, the target area RL1 is divided into several line segments P1P2, P2P3, P3P4, P4P5..., and the self-defined parameter Rposition is first introduced to determine the position relationship between O1 and P1P2 of RL1, and the calculation formula is as follows:

[0156] Rposition=(P 1lat -O 1lat )*(P 2lon -O 1lon )-(P 2lat -O 1lat )*(P 1lon -O 1lon );

[0157] If the Rposition result is 0, it means on the line segment; if it is greater than 0, it means on the left; if it is less than 0, it means on the right. The formula is used to further calculate the relative positions of O1, O2, and O3 in several line segments P1P2, P2P3, P3P4, P4P5... in the target area RL1.

[0158] Next, calculate the intersection of the rightward extension of points O1, O2, and O3 with the red line RL1, such as Figure 5As shown, the intersections of the extended line of O1 and the red line RL1 are node1 and node2; the extended line of O2 and the red line RL1 do not have any intersections; the extended line of O1 and the red line RL1 have one intersection, node3; according to reasoning, when the number of intersections is an odd number, O1 is inside the red line RL1, and when the number of intersections is an even number, O2 is outside the red line RL1. By analogy, the actual wireless coverage area O1 is finally obtained to be inside the target area RL1, and it is only necessary to calculate the overlapping area with the target area according to the regular graph.

[0159] For the overlapping relationship between the actual wireless coverage area O2 and the target area RL1, see Figure 6 , is a schematic diagram of the principle of calculating the intersection area in an embodiment of the present invention. By adding a number of horizontal and vertical coordinate axes on the map, the irregular layer P1P2P3P4P5 of the overlapping area of ​​the wireless coverage layer and the target area is divided into multiple regular graphics, and the area of ​​the regular layer is calculated. Finally, in a differential manner, the area integrals of all differential units are added to obtain the intersection area of ​​each base station sector wireless coverage area and the target area. The calculation formula is as follows:

[0160]

[0161] Further calculate the area formula:

[0162]

[0163] The area is equal to a line integral around the contour. The area calculation formula of the intersection area of ​​the actual wireless coverage area and the target area is finally calculated:

[0164]

[0165] Among them, x n+1 =x0,y n+1 =y0.

[0166] More preferably, in order to further improve the accuracy of the target base station associated with the target area, based on the above embodiment, the method further includes:

[0167] When the second overlapping relationship is satisfied, calculating an area overlap rate according to the intersection area and the actual wireless coverage area;

[0168] The target base stations whose overlap rate is less than or equal to the preset overlap rate threshold are eliminated to obtain updated target base stations.

[0169] Specifically, after the intersection area is calculated, the overlap rate f between the base station and the target area is obtained by the intersection area of ​​the base station coverage area and the target area. The overlap rate threshold X is set. After measurement, when X is less than 70%, the error rate of SMS sending will increase. Therefore, in this step of calculation, the base stations in the actual wireless coverage area with an overlap rate f≤X are eliminated as invalid base stations. The calculation formula for the overlap rate f is as follows:

[0170]

[0171] By adopting the technical means of the embodiments of the present invention, the irregular intersection area where the wireless coverage area and the target area overlap is divided by introducing a number of horizontal and vertical coordinate axes on the map, and the area of ​​the intersection area is calculated in a differential manner. The area of ​​the target wireless coverage area of ​​the base station in the target area is accurately calculated through an autonomous spatial coupling algorithm. The present invention calculates the correlation relationship between the base station and the target area based on the area of ​​the intersection area between the actual wireless coverage area of ​​the base station and the target area, and the result is more accurate.

[0172] As a preferred implementation, the embodiment of the present invention is further implemented on the basis of any of the above embodiments, and the method further includes step S15:

[0173] S15. Push personalized information to user terminals in the target wireless coverage area through the target base station.

[0174] In an embodiment of the present invention, after calculating the association relationship between the target base station and the target area, that is, the target wireless coverage area of ​​the target base station in the target area, personalized information can be pushed to the user terminal in the target wireless coverage area of ​​the target base station in a targeted manner to achieve accurate information services for users.

[0175] Preferably, the pushing of personalized information to user terminals in the target wireless coverage area through the target base station includes:

[0176] Acquire base station passenger flow data in the target wireless coverage area;

[0177] Determining the population type according to the base station crowd flow data;

[0178] Determine the corresponding preset personalized information content and push frequency according to the population type;

[0179] The corresponding personalized information content is pushed to user terminals of different population types in the target wireless coverage area according to the push frequency through the target base station.

[0180] Taking the target area as the ecological protection red line area as an example, based on the correlation between the base station and the ecological protection red line calculated by the above algorithm, combined with the statistical data of human flow, the purpose of ecological protection publicity, science and education, and early warning is effectively achieved by sending text messages, and the work content of human activity interference management is implemented. The text message rules for different population types are determined and the corresponding text message template content is set for different population types and different red line types. By creating text message tasks, publicity text messages are sent to permanent populations or indigenous residents. For people with abnormal behavior, the administrator is triggered to send an alarm text message that the flow of people exceeds the threshold. The administrator decides whether to intervene and deal with it, so as to achieve accurate reach of different populations and complete the publicity of ecological protection red lines and the protection of the ecological environment.

[0181] The embodiment of the present invention formulates a method for determining the user type and a rule for sending short messages based on the flow of people in the collection area, which are as follows:

[0182] First, determine the population type under the coverage area of ​​the ecological protection red line base station: count the personnel covered by the ecological protection red line base station through personnel mobility, residence time, movement trajectory, geographical location and other characteristic indicators, count the data indicators of the past 6 months, and give different coefficients for different indicator characteristics, personnel mobility (users frequently move between different regions): 0.3, residence time (people live continuously or stay frequently): 0.3, movement trajectory: 0.2, geographical location: 0.2. In this scoring mechanism, the permanent population indicator is given a positive score and the floating population indicator is given a negative score. The final score of the personnel is calculated and combined with the indicator results based on the set threshold L. The indicator value greater than L is determined as the permanent population, and the indicator value less than L is determined as the floating population. However, due to the user's own reasons, the conversion of population types is very common. Combined with the user's behavior recognition and clustering algorithm, the population type is updated regularly.

[0183] Determine the content of SMS for different population types: For permanent residents, mainly send SMS about ecological protection red line, to improve the awareness of permanent residents about ecological protection red line, emphasize everyone's responsibility in protecting ecological environment, and encourage everyone to actively participate in ecological protection actions. For floating population, when the population in non-ecological red line area enters the ecological protection red line area, mainly send early warning SMS to provide timely warning. When the ecosystem may be threatened or damaged, issue early warning in time to remind relevant parties to take emergency measures to prevent further expansion of ecological damage. For all populations, popularize ecological protection knowledge, etc.

[0184] Determine the frequency of sending according to the content of the SMS and influencing factors: SMS will be divided into regular SMS and irregular SMS according to the resident population and floating population. Regular SMS is for ecological protection publicity and education when the resident population enters the red line. SMS will be sent to the resident population regularly by setting the SMS sending frequency, sending time, and SMS content. Irregular SMS is for ecological protection publicity and education when the floating population enters the red line. SMS sending will be achieved through an intelligent trigger mechanism. The details are as follows:

[0185] First entry notification: When a user first enters the ecological protection red line, a welcome message and basic ecological protection guidelines will be sent. Abnormal behavior warning: When abnormal behavior is detected, an alarm text message will be sent to the administrator immediately, and reminders will be sent to relevant users as appropriate. Regular education and updates: Based on user behavior and environmental changes, ecological protection knowledge updates, policy changes and other information will be sent regularly.

[0186] The frequency of SMS sending will be dynamically controlled according to the density of people. When there are dense crowds, such as during holidays and weekends, the frequency of SMS sending will be increased to raise public awareness. When there are sparse crowds, unnecessary SMS will be reduced to avoid disturbing users. At the same time, it is allowed to set parameters such as daily and hourly SMS sending limits to limit the amount of SMS sent.

[0187] See also Figure 7 and Figure 8 , Figure 7 It is a schematic diagram of the principle of the wireless coverage area of ​​the base station in the target area in the prior art. Figure 8 This is a schematic diagram of the actual wireless coverage area of ​​a base station in a target area according to an embodiment of the present invention. Compared with the traditional calculation method, the embodiment of the present invention not only improves the accuracy of the analysis of the wireless coverage area of ​​a base station sector, but also improves the accuracy of the relationship between the base station and the target area. Figure 8 As shown in FIG. 1 , the base station wireless coverage distribution map calculated by the prior art cannot distinguish the wireless coverage areas of base station sectors in different coverage directions, and the calculation accuracy of the actual wireless coverage area of ​​the base station is poor, resulting in general statistical data. The relationship between the base station and the target area calculated according to the embodiment of the present invention is shown in FIG. Fig. 9 As shown, according to the calculation of the precise coverage layer, only 4 base station sectors actually cover the target area, and the calculation accuracy of the target wireless coverage area of ​​each base station in the target area is relatively high. The relationship between the base station sectors and the target area calculated by the embodiment of the present invention is more accurate. In supporting personalized information push, such as text message sending, it not only improves the accuracy of text message sending, but also reduces the cost of text message sending, and improves user satisfaction.

[0188] See also Fig. 9, is a schematic diagram of the structure of a base station coverage information processing device provided by an embodiment of the present invention. The embodiment of the present invention provides a base station coverage information processing device 20, including:

[0189] A target base station determination module 21 is used to determine a target area and a target base station associated with the target area;

[0190] The actual coverage distance calculation module 22 is used to perform base station network coverage analysis on the target base station, calculate the dynamic correction base station coverage distance parameter, correct the theoretical coverage distance of the target base station, and obtain the actual coverage distance of the target base station;

[0191] An actual wireless coverage area calculation module 23, configured to calculate the actual wireless coverage area of ​​the target base station at a preset coverage location according to the actual coverage distance;

[0192] The target wireless coverage area determination module 24 is used to determine the target wireless coverage area of ​​the target base station within the target area according to the relationship between the actual wireless coverage area and the target area.

[0193] It should be noted that a base station coverage information processing device provided in an embodiment of the present invention is used to execute all process steps of a base station coverage information processing method in the above embodiment, and the working principles and beneficial effects of the two correspond one to one, so they will not be repeated.

[0194] See also Fig.10 , is a structural diagram of a base station coverage information processing device provided in an embodiment of the present invention. An embodiment of the present invention provides a base station coverage information processing device 30, including a processor 31, a memory 32, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the base station coverage information processing method as described in any one of the above embodiments.

[0195] An embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the base station coverage information processing method as described in any one of the above embodiments.

[0196] An embodiment of the present invention further provides a computer program product, which includes a computer program or computer instructions. When the computer program or the computer instructions are executed by a processor, the base station coverage information processing method as described in any one of the above embodiments is implemented.

[0197] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0198] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A base station coverage information processing method, characterized in that: include: Determining a target area and a target base station associated with the target area; Performing base station network coverage analysis on the target base station, calculating a dynamically corrected base station coverage distance parameter, and correcting the theoretical coverage distance of the target base station to obtain an actual coverage distance of the target base station; Calculating the actual wireless coverage area of ​​the target base station at the preset coverage location according to the actual coverage distance; A target wireless coverage area of ​​the target base station within the target area is determined according to the relationship between the actual wireless coverage area and the target area.

2. The base station coverage information processing method according to claim 1, characterized in that: The performing base station network coverage analysis on the target base station, calculating the dynamically corrected base station coverage distance parameter, and correcting the theoretical coverage distance of the target base station to obtain the actual coverage distance of the target base station includes: According to the wireless coverage parameters of the target base station, a base station network coverage analysis is performed using a wireless network analysis algorithm to calculate a theoretical coverage distance of the target base station; Calculating a dynamically corrected base station coverage distance parameter of the target base station according to the signaling data of the target base station, the reference signal received power reported by the connected user terminal, and the theoretical coverage distance; The theoretical coverage distance is corrected according to the dynamically corrected base station coverage distance parameter to obtain the actual coverage distance of the target base station.

3. The base station coverage information processing method according to claim 1, characterized in that: The calculating, according to the actual coverage distance, an actual wireless coverage area of ​​the target base station at a preset coverage location includes: When a preset condition is met, it is determined that there is an obstacle in the preset coverage direction of the target base station; wherein the preset condition is that the distance from the user terminal to the base station is less than the preset distance, and the reference signal received power reported by the user terminal is less than the preset standard value, and the preset distance is less than the actual coverage distance; Acquire the location information of the obstacle, and calculate the effective coverage area of ​​the target base station in the coverage direction according to the location information of the obstacle and the position of the base station; Calculate the area of ​​the diffraction signal coverage area formed by the target base station behind the building; The actual wireless coverage area of ​​the target base station in the preset coverage direction is obtained according to the difference between the effective coverage area and the area covered by the diffraction signal.

4. The base station coverage information processing method according to claim 3, characterized in that: The calculating the area of ​​the diffraction signal coverage area formed by the target base station behind the building shielding includes: Calculating the signal intensity of the area covered by the diffraction signal according to the diffraction coefficient of the area covered by the diffraction signal; The area covered by the diffraction signal is calculated according to the signal intensity.

5. The base station coverage information processing method according to claim 1, characterized in that: The determining, according to the relationship between the actual wireless coverage area and the target area, a target wireless coverage area of ​​the target base station within the target area comprises: Determine an overlapping relationship between each of the actual wireless coverage areas and the target area; wherein the overlapping relationship is a first overlapping relationship in which the target area includes the actual wireless coverage area, or a second overlapping relationship in which the target area partially intersects with the actual wireless coverage area; When the first overlapping relationship is satisfied, obtaining a target wireless coverage area of ​​the target base station within the target area according to the actual wireless coverage area; When the second overlapping relationship is satisfied, the intersection area of ​​the actual wireless coverage area and the target area is divided into several regular figures by introducing several horizontal and vertical coordinate axes, and the area of ​​each regular figure is calculated by a differential algorithm, and the area of ​​the intersection area is obtained by adding the areas of all the regular figures to obtain the target wireless coverage area of ​​the target base station within the target area.

6. The base station coverage information processing method according to claim 5, characterized in that: The determining of the overlapping relationship between each of the actual wireless coverage areas and the target area includes: Splitting the surface of the actual wireless coverage area into a plurality of points; Determine whether all points are within the target area; If yes, the actual wireless coverage area and the target area satisfy the first overlapping relationship; If not, the actual wireless coverage area and the target area satisfy the second overlapping relationship.

7. The base station coverage information processing method according to claim 5, characterized in that: The method further comprises: When the second overlapping relationship is satisfied, calculating an area overlap rate according to the intersection area and the actual wireless coverage area; The target base stations whose overlap rate is less than or equal to the preset overlap rate threshold are eliminated to obtain updated target base stations.

8. The base station coverage information processing method according to claim 1, characterized in that: The determining a target base station associated with the target area includes: Obtain several base stations to be tested; Taking the position of the base station to be tested as the origin and the preset coverage distance as the radius, constructing the initial wireless coverage area of ​​each base station to be tested; The base station to be tested whose initial wireless coverage area overlaps with the target area is taken as the first base station; Scoring the coverage quality of each of the first base stations according to the wireless coverage parameters of each of the first base stations and the preset weight thereof to obtain a first scoring result of each of the first base stations, and selecting a second base station according to the first scoring result; Acquire base station passenger flow data of each second base station in the target area; A pedestrian flow score is performed on each of the second base stations according to the base station pedestrian flow data to obtain a second scoring result of each of the second base stations, and a target base station is screened according to the second scoring result.

9. The base station coverage information processing method according to any one of claims 1 to 8, characterized in that: The method further comprises: The personalized information is pushed to user terminals in the target wireless coverage area through the target base station.

10. The base station coverage information processing method according to claim 9, characterized in that: The pushing of personalized information to user terminals in the target wireless coverage area through the target base station includes: Acquire base station passenger flow data in the target wireless coverage area; Determining the population type according to the base station crowd flow data; Determine the corresponding preset personalized information content and push frequency according to the population type; The corresponding personalized information content is pushed to user terminals of different population types in the target wireless coverage area according to the push frequency through the target base station.

11. A base station coverage information processing device, characterized in that: include: A target base station determination module, used to determine a target area and a target base station associated with the target area; The actual coverage distance calculation module is used to perform base station network coverage analysis on the target base station, calculate the dynamic correction base station coverage distance parameter, correct the theoretical coverage distance of the target base station, and obtain the actual coverage distance of the target base station; An actual wireless coverage area calculation module, used to calculate the actual wireless coverage area of ​​the target base station in a preset coverage direction according to the actual coverage distance; The target wireless coverage area determination module is used to determine the target wireless coverage area of ​​the target base station within the target area according to the relationship between the actual wireless coverage area and the target area.

12. A base station coverage information processing device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, the method for processing base station coverage information as claimed in any one of claims 1 to 10 is implemented.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the base station coverage information processing method according to any one of claims 1 to 10.

14. A computer program product, characterized in that The computer program product includes a computer program or a computer instruction, and when the computer program or the computer instruction is executed by a processor, the base station coverage information processing method according to any one of claims 1 to 10 is implemented.

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