Mobile communication network coverage analysis method, system and device and storage medium

Abstract

The invention discloses a mobile communication network coverage analysis method, system and device and a storage medium, which are corresponding schemes, and in the related scheme, wireless beam reference envelopes of measurement samples can be depicted based on a digital twinborn technology in combination with collected data measurement samples of a wireless network and parameters of a beam forming antenna, and the coverage of the mobile communication network can be analyzed. On the basis, filling of signal intensity can be carried out on a sample-free area, then a corresponding base station coverage range is generated, the coverage range can be presented on the ground, coverage schematic of each base station is visually displayed, and powerful data support is provided for new station planning of an operator and coverage adjustment of an existing base station; according to the scheme, manpower and material resources consumed by manual testing can be saved, the precision and efficiency of network coverage evaluation are greatly improved, and convenient and rapid reference is provided for 4G / 5G wireless network planning and optimization.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless network communication analysis, and in particular to a method, system, device and storage medium for analyzing mobile communication network coverage. Background Art

[0002] As operators implement large-scale commercial coverage of 4G and 5G, how to evaluate the coverage range of wireless base stations (or cells), coverage signal strength, and coverage relationship between base stations (or cells) on a large scale, efficiently, and accurately is the basis for operators to optimize their networks and plan new sites.

[0003] At present, the analysis and evaluation of base station (or cell) coverage strength and base station (or cell) coverage range at home and abroad usually adopts manual testing methods, using handheld test equipment to travel between roads and buildings, and using the equipment to record the signal strength measured by the current test equipment. This method requires a lot of manpower and material resources, but in practice it still cannot reach more user usage scenarios, such as inside user homes, etc. Therefore, it is impossible to obtain a comprehensive network evaluation, and there are considerable test loopholes.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a method, system, device and storage medium for analyzing mobile communication network coverage, which can save the manpower and material resources required for manual testing, greatly improve the accuracy and efficiency of network coverage evaluation, and provide a convenient and fast reference for 4G / 5G wireless network planning and optimization.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A method for analyzing mobile communication network coverage, comprising:

[0008] Collect measurement samples of wireless network data corresponding to the base station to be analyzed and build a digital twin model;

[0009] In the digital twin model, the relative position relationship between the base station to be analyzed and each measurement sample is calculated based on the position information carried by each measurement sample;

[0010] Combining the relative position relationship between the base station to be analyzed and each measurement sample, a wireless beam reference envelope from each base station to be analyzed to each measurement sample is formed;

[0011] For each wireless beam reference envelope, fill the signal strength inside and outside the envelope respectively;

[0012] The build envelopes that meet the set signal strength are merged to form a total build envelope, and a set of build envelopes corresponding to the signal strengths are constructed by combining different signal strengths to obtain the results of the digital twin model.

[0013] A mobile communication network coverage analysis system, comprising:

[0014] A measurement sample collection and digital twin model construction unit, used to collect measurement samples of wireless network collection data corresponding to the base station to be analyzed and to construct a digital twin model;

[0015] A relative position calculation unit, used to calculate the relative position relationship between the base station to be analyzed and each measurement sample according to the position information carried by each measurement sample in the digital twin model;

[0016] A wireless beam reference envelope calculation unit, used to form a wireless beam reference envelope from each base station to be analyzed to each measurement sample in combination with the relative position relationship between the base station to be analyzed and each measurement sample;

[0017] A signal strength filling unit, used for filling the signal strength inside and outside the envelope of each wireless beam reference envelope;

[0018] The signal strength envelope construction unit is used to merge the construction envelopes that meet the set signal strength to form a total construction envelope, and combine different signal strengths to construct a set of construction envelopes corresponding to the signal strength to obtain the results of the digital twin model.

[0019] A processing device, comprising: one or more processors; a memory for storing one or more programs;

[0020] When the one or more programs are executed by the one or more processors, the one or more processors implement the aforementioned method.

[0021] A readable storage medium stores a computer program, which implements the above method when the computer program is executed by a processor.

[0022] It can be seen from the technical solution provided by the present invention that based on the digital twin technology, combined with the collected data measurement samples of the wireless network and the parameters of the beamforming antenna, the wireless beam reference envelope of each measurement sample can be characterized. On this basis, the signal strength of the sample-free area can be filled, and then the corresponding base station coverage range can be generated. The coverage range can be presented on the ground, intuitively showing the coverage diagram of each base station, and providing strong data support for operators' new station planning and coverage adjustment of existing base stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 A flowchart of a method for analyzing mobile communication network coverage provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a method for analyzing mobile communication network coverage provided by an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of a mobile communication network coverage analysis system provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of a processing device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings 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 protection scope of the present invention.

[0029] First, the terms that may be used in this article are explained as follows:

[0030] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0031] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0032] The following is a detailed description of a method, system, device and storage medium for analyzing mobile communication network coverage provided by the present invention. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professional and technical personnel in the field. If no specific conditions are specified in the embodiments of the present invention, the conventional conditions in the field or the conditions recommended by the manufacturer shall be followed.

[0033] Embodiment 1

[0034] The embodiment of the present invention provides a method for analyzing mobile communication network coverage, such as Figure 1 As shown, it mainly includes the following steps:

[0035] Step 1: Collect measurement samples of wireless network acquisition data corresponding to the base station to be analyzed and build a digital twin model.

[0036] In the embodiment of the present invention, the measurement sample of the wireless network data collection may be an MR sample, an MDT sample or an OTT sample, or other similar sampling data forms, and the present invention is not limited to the specific data. Generally speaking, the measurement sample includes at least: location information, signal strength, and identification information of the base station.

[0037] In an embodiment of the present invention, a digital twin model is constructed using measurement samples and the base station to be analyzed. The constructed digital twin model is a high-precision simulation environment that can intuitively detect network status and signal performance under different conditions.

[0038] Step 2: Calculate the relative position relationship between the base station to be analyzed and each measurement sample based on the position information carried by each measurement sample.

[0039] In an embodiment of the present invention, an analysis of mobile communication network coverage is performed based on a digital twin model. In the digital twin model, each measurement sample and the base station to be analyzed can be plotted in a unified coordinate system according to their respective positions, and the base station to be analyzed can be connected to each measurement sample respectively, and the azimuth and distance between the base station to be analyzed and each measurement sample can be calculated (the two are collectively referred to as relative position relationship).

[0040] Step 3: Based on the relative position relationship between the base station to be analyzed and each measurement sample, a wireless beam reference envelope from each base station to be analyzed to each measurement sample is formed.

[0041] In an embodiment of the present invention, relevant beam data can be generated by combining the relative position relationship between the base station to be analyzed and each measurement sample, as well as the beam width of the beamforming antenna of the base station to be analyzed, to form a wireless beam benchmark from each base station to be analyzed to each measurement sample.

[0042] Step 4: For each wireless beam reference envelope, fill the signal strength inside and outside the envelope respectively.

[0043] In an implementation method provided by the present invention: for each wireless beam reference envelope, the signal strength is converted according to the wireless propagation model and the empirical value of terrain penetration loss. The distance between the measurement sample and each position point inside and outside the corresponding wireless beam reference envelope, as well as the signal strength carried by the measurement sample, are combined to calculate the signal strength of each position point inside and outside the wireless beam reference envelope to complete the signal strength filling.

[0044] Step 5: Merge the build envelopes that meet the set signal strength to form a total build envelope, and combine different signal strengths to construct a set of build envelopes corresponding to the signal strength to obtain the result of the digital twin model.

[0045] In the above scheme provided by the embodiment of the present invention, the corresponding base station coverage range is generated based on the measurement samples of the collected data of the wireless network. The method has the characteristics of being easy to use for computer batch processing and graphical calculations, and having a wide range of applications. It can save the manpower and material resources required for manual testing, greatly improve the accuracy and efficiency of network coverage evaluation, and provide a convenient and quick reference for 4G / 5G wireless network planning and optimization.

[0046] In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, Figure 2 The example shown describes in detail the method provided by the embodiment of the present invention.

[0047] 1. Data collection and digital twin model construction.

[0048] In the implementation of the present invention, the MR / MDT / OTT samples of collected data collected from the wireless network need to have the following necessary attributes: 1. Location information: it can be directly the longitude and latitude in a certain coordinate system or the relative position for determining the reference point. If it is three-dimensional data, it has height information; 2. Measurement information of the location: the signal strength of the main service cell; 3. Identification information of the measurement cell: the ID identification information of the main service cell; 4. Other information (non-essential attributes): signal quality of the main service cell (such as RSRP, SINA, etc.), signal strength of neighboring cells, terminal hardware and software information, service connection information at the time, etc.

[0049] Among them, MR (Measurement Report) is a measurement report. In mobile communications, mobile devices such as mobile phones will measure the signal strength and signal quality of the cell in which they are located, and feed back this information to the network side. The network optimizes the network based on these MRs, for example, adjusting the antenna direction and power. MDT (Minimization of Drive-Tests) is a technology for minimizing drive tests. It is a technology for collecting network data through mobile devices to reduce the workload of manual drive tests; it uses user terminals to automatically collect and report data related to network performance, which can help operators understand many performance indicators such as network coverage. OTT (Over-The-Top) means "over-the-top pass". In the field of mobile communications, it is extended to Internet companies that bypass operators and provide services directly to users, such as Tencent Video, Skype and other applications. They are based on the operator's network, but the services are provided by the Internet companies themselves and are not controlled by the operator's traditional communication business.

[0050] It should be noted that the data format of the above-mentioned measurement samples is only an example and does not constitute a limitation. In practical applications, other forms of measurement samples may be used as needed.

[0051] In an embodiment of the present invention, an analysis of mobile communication network coverage is performed in a digital twin model. Digital twins mainly use physical objects in the physical world to construct completely consistent digital mappings in virtual space. For the mobile communication network coverage analysis of the present invention, the constructed digital twin model is a high-precision simulation environment that contains all relevant parameters, such as geographic location, base station configuration, building layout, environmental interference and other information. Through the digital twin system, the actual network status can be monitored in real time, and the signal performance under different conditions can be predicted; wherein, the geographic location can be obtained through the information carried in the measurement sample, the base station configuration is also known information, the building layout can be obtained through a high-precision digital map, and the environmental interference can be calculated in combination with the classical model formula of the wireless propagation model. In the subsequent scheme, some calculations are performed based on the digital twin model, and finally the result of the digital twin model (i.e., the construction envelope corresponding to each signal strength) is obtained.

[0052] 2. Calculate the position relationship between all measurement samples and the corresponding base stations (cells).

[0053] In the embodiment of the present invention, the measurement samples and the corresponding base station (cell) positions are presented in a unified coordinate system, wherein the position of the base station is known and serves as the origin of the coordinate system. The measurement samples already carry relevant position information, and therefore, the corresponding sample position points can be drawn in the coordinate system; then, all the measurement samples and the corresponding base stations (cells) are connected, and the azimuths and distances of all the measurement samples and the corresponding base stations (cells) are calculated, such as Figure 2As shown in part ① of FIG, an example of the locations of 5 measurement samples is shown.

[0054] It should be noted that Figure 2 What is shown is an example of a two-dimensional coordinate diagram. The solution of the present invention is also applicable to three-dimensional scenes, and the content of the solution is the same, so it will not be repeated.

[0055] 3. Construct the wireless beam reference envelope of each measurement sample.

[0056] In the embodiment of the present invention, the position of each sampling sample from the base station is calculated, and the relevant beam data is generated according to the beam width definition of the beamforming antenna (Beamforming) used for 4G / 5G communication (generally between 1 degree and 30 degrees), so as to form a wireless beam reference envelope of the measurement sample, such as Figure 2 As shown in part ② of FIG, an example of a wireless beam reference envelope of five measurement samples is shown. The wireless beam reference envelope can be understood as the boundary of a range of equal signal strength.

[0057] 4. Fill the signal strength of each wireless beam reference envelope.

[0058] In the embodiment of the present invention, a corresponding signal strength filling scheme is selected according to the number of measured samples. Specifically, if the number of measured samples does not reach the set value, that is, there are many blank areas where samples are not reported, and there is a high-precision electronic map (with a building layer or landform classification), scheme (1) is adopted, that is, according to the classical model formula of the wireless propagation model, combined with the landform penetration loss conversion, fill the space without measured sample points inside and outside the reference envelope; if the number of measured samples reaches the set value, that is, there are fewer blank areas of samples, then scheme (2) is adopted, that is, linear filling is performed based on the known signal strength in the wireless beam reference envelope; the set value described here is a pre-set threshold value, and its specific value can be adjusted according to actual conditions or experience. The present invention does not make specific numerical restrictions. The following introduces the two signal strength filling schemes respectively.

[0059] Solution (1): Based on the classical wireless propagation model formula and terrain penetration loss conversion, fill the space without measurement sample points inside and outside the reference envelope.

[0060] like Figure 2 As shown in part ③, the position points Pm and Pn of any measurement sample have their own reference envelopes. Any point IPn on the ray passing through point Pn with the base station as the origin is ’ or EPn ’ The signal strength can be converted through the classic wireless propagation model formula and the empirical value of terrain penetration loss. ’ or EPn ’The distance to the origin of the base station, the distances of the digital map landform objects O1, O2 and O3 in the ray directions IDn1, IDn2 and EDn3, and the distances between landform objects ILn1, ILn2, ILn3, ELn1 and ELn2 can all be calculated in the digital map. In addition, the network operating frequency band, the base station height in the engineering parameters, and the terminal height (the terminal height can be reported, if not, it can be converted according to the road surface or building height in the digital map where the terminal is located) are all known information. Through the above known information, any point IPn on the ray with the base station as the origin and passing through point Pn can be obtained. ’ or EPn ’ The signal strength of IPn ’ or EPn ’ The point generates the corresponding construction envelope.

[0061] Solution (2): Linear filling based on the known signal strength in the wireless beam reference envelope. Figure 2 As shown in part ③, the wireless beam reference envelopes of different measurement samples overlap to a certain extent. When there are other measurement samples on the line from the base station to the measurement sample, the signal strength of the position between the measurement samples is linearly filled according to the signal strength of the measurement sample. For example, the position point P from the base station to any measurement sample m The measurement samples P that are closer on the line m1 and P m2 The signal strength P mx , can be based on the measured sample P m1 and P m2 The more measurement samples there are in the wireless beam reference envelope and the more evenly distributed they are, the higher the filling accuracy will be.

[0062] 5. Merge the constructed envelopes that satisfy the set signal strength Q to form the total constructed envelope of the set signal value, such as Figure 2 As shown in part ④ of FIG. Moreover, a set of constructed envelopes can be formed for different signal strengths Q1, Q2, Q3...Qn, such as Figure 2 As shown in part ⑤ of the figure, its form is similar to the contour lines describing the geographical elevation. The present invention can visualize the wireless coverage by merging envelopes with the same signal strength to form envelopes with corresponding signal strength values.

[0063] In this section, the signal strength Q is set to be the signal strength that the analyst is concerned about, usually a weak coverage threshold, such as -100dBm or -110dBm, etc. Of course, this is only an example and can be modified as needed in actual applications.

[0064] In the above solution, with the help of digital twin technology, we can have a more intuitive and in-depth understanding of the existing mobile communication network coverage, which will facilitate technicians to adjust the base station configuration and improve the service level of the overall network.

[0065] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above embodiments can be implemented by software, or by means of software plus necessary general hardware platforms. Based on such understanding, the technical solutions of the above embodiments can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0066] Embodiment 2

[0067] The present invention also provides a mobile communication network coverage analysis system, which is mainly used to implement the method provided in the above embodiment, such as Figure 3 As shown, the system mainly includes:

[0068] A measurement sample collection and digital twin model construction unit, used to collect measurement samples of wireless network collection data corresponding to the base station to be analyzed and to construct a digital twin model;

[0069] A relative position calculation unit, used to calculate the relative position relationship between the base station to be analyzed and each measurement sample according to the position information carried by each measurement sample in the digital twin model;

[0070] A wireless beam reference envelope calculation unit, used to form a wireless beam reference envelope from each base station to be analyzed to each measurement sample in combination with the relative position relationship between the base station to be analyzed and each measurement sample;

[0071] A signal strength filling unit, used for filling the signal strength inside and outside the envelope of each wireless beam reference envelope;

[0072] The signal strength envelope construction unit is used to merge the construction envelopes that meet the set signal strength to form a total construction envelope, and combine different signal strengths to construct a set of construction envelopes corresponding to the signal strength to obtain the results of the digital twin model.

[0073] Considering that the main technical details involved in the above system have been introduced in detail in the previous embodiments, they will not be repeated here.

[0074] Technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the system can be divided into different functional modules to complete all or part of the functions described above.

[0075] Embodiment 3

[0076] The present invention also provides a processing device, such as Figure 4 As shown, it mainly includes: one or more processors; a memory for storing one or more programs; wherein, when the one or more programs are executed by the one or more processors, the one or more processors implement the methods provided in the aforementioned embodiments.

[0077] Furthermore, the processing device also includes at least one input device and at least one output device; in the processing device, the processor, memory, input device, and output device are connected via a bus.

[0078] In the embodiment of the present invention, the specific types of the memory, input device and output device are not limited; for example:

[0079] The input device may be a touch screen, an image acquisition device, a physical button or a mouse, etc.;

[0080] The output device may be a display terminal;

[0081] The memory may be a random access memory (RAM) or a non-volatile memory, such as a disk memory.

[0082] Embodiment 4

[0083] The present invention also provides a readable storage medium storing a computer program, which implements the method provided in the above embodiment when the computer program is executed by a processor.

[0084] In the embodiment of the present invention, the readable storage medium is a computer-readable storage medium and can be set in the aforementioned processing device, for example, as a memory in the processing device. In addition, the readable storage medium can also be a U disk, a mobile hard disk, a read-only memory (ROM), a disk or an optical disk, etc., which can store program codes.

[0085] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for analyzing mobile communication network coverage, characterized in that: include: Collect measurement samples of wireless network data corresponding to the base station to be analyzed and build a digital twin model; In the digital twin model, the relative position relationship between the base station to be analyzed and each measurement sample is calculated based on the position information carried by each measurement sample; Combining the relative position relationship between the base station to be analyzed and each measurement sample, a wireless beam reference envelope from each base station to be analyzed to each measurement sample is formed; For each wireless beam reference envelope, fill the signal strength inside and outside the envelope respectively; The build envelopes that meet the set signal strength are merged to form a total build envelope, and a set of build envelopes corresponding to the signal strengths are constructed by combining different signal strengths to obtain the results of the digital twin model.

2. The method for analyzing mobile communication network coverage according to claim 1, characterized in that: The measurement sample includes at least: location information, signal strength, and identification information of the base station.

3. The method for analyzing mobile communication network coverage according to claim 1, characterized in that: The calculating the relative position relationship between the base station to be analyzed and each measurement sample comprises: Each measurement sample and the base station to be analyzed are plotted in a unified coordinate system according to their respective positions, and the base station to be analyzed is connected to each measurement sample respectively, and the azimuth and distance between the base station to be analyzed and each measurement sample are calculated.

4. The method for analyzing mobile communication network coverage according to claim 1, characterized in that: The forming of a wireless beam reference envelope from each base station to be analyzed to each measurement sample in combination with the relative position relationship between the base station to be analyzed and each measurement sample comprises: Relevant beam data is generated based on the relative position relationship between the base station to be analyzed and each measurement sample, as well as the beam width of the beamforming antenna of the base station to be analyzed, to form a wireless beam reference from each base station to be analyzed to each measurement sample.

5. The method for analyzing mobile communication network coverage according to claim 1, characterized in that: For each wireless beam reference envelope, performing signal strength filling inside and outside the envelope respectively includes: The corresponding signal strength filling scheme is selected according to the number of measurement samples in the wireless beam reference envelope. If the number of measurement samples does not reach the set value and there is an electronic map, the space without measurement sample points inside and outside the reference envelope is filled according to the classical model formula of the wireless propagation model and the terrain penetration loss conversion; if the number of measurement samples reaches the set value, linear filling is performed according to the known signal strength in the wireless beam reference envelope.

6. A method for analyzing mobile communication network coverage according to claim 5, characterized in that: The classical model formula of the wireless propagation model, combined with the terrain penetration loss conversion, fills the space without measurement sample points inside and outside the reference envelope, including: For each wireless beam benchmark envelope, the signal strength is converted based on the wireless propagation model and the empirical value of terrain penetration loss. The signal strength of each point inside and outside the wireless beam benchmark envelope is calculated by combining the distance between the measured sample and the corresponding wireless beam benchmark envelope, as well as the signal strength carried by the measured sample, to complete the signal strength filling.

7. The method for analyzing mobile communication network coverage according to claim 5, characterized in that: The linear filling according to the known signal strength in the wireless beam reference envelope includes: There is overlap in the wireless beam reference envelopes of different measurement samples. When there are other measurement samples on the line from the base station to the measurement sample, the signal strength of the position between the measurement samples is linearly filled according to the signal strength of the measurement sample.

8. A mobile communication network coverage analysis system, characterized in that: include: A measurement sample collection and digital twin model construction unit, used to collect measurement samples of wireless network collection data corresponding to the base station to be analyzed and to construct a digital twin model; A relative position calculation unit, used to calculate the relative position relationship between the base station to be analyzed and each measurement sample according to the position information carried by each measurement sample in the digital twin model; A wireless beam reference envelope calculation unit, used to form a wireless beam reference envelope from each base station to be analyzed to each measurement sample in combination with the relative position relationship between the base station to be analyzed and each measurement sample; A signal strength filling unit, used for filling the signal strength inside and outside the envelope of each wireless beam reference envelope; The signal strength envelope construction unit is used to merge the construction envelopes that meet the set signal strength to form a total construction envelope, and combine different signal strengths to construct a set of construction envelopes corresponding to the signal strength to obtain the results of the digital twin model.

9. A processing device, characterized in that: include: one or more processors; A memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 7.

10. A readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

Images