Tunnel terminal positioning method and system, storage medium and positioning equipment

Abstract

The invention discloses a tunnel terminal positioning method and system, a storage medium and positioning equipment. The method comprises the following steps: acquiring a measurement report reported by a mobile terminal in a tunnel line and respective transmission parameters and first latitude and longitude coordinates of a plurality of base stations covering the tunnel line; for each base station, determining the longitude and latitude coordinate range of the mobile terminal in the coverage range of the base station according to the transmission parameter of the base station, the first longitude and latitude coordinate of the base station and the measurement report reported by the mobile terminal; and determining a target latitude and longitude coordinate of the mobile terminal according to the latitude and longitude coordinate range of the mobile terminal in the coverage range of each base station. According to the method and the device, the technical problems of high implementation difficulty and poor measurement result accuracy when the mobile terminal in the high-tightness tunnel is positioned in the prior art are solved.

Description

Technical Field

[0001] The present application relates to the field of information and communication technology, and in particular to a tunnel terminal positioning method and system, a storage medium, and a positioning device. Background Art

[0002] In the construction of communication networks, in order to accurately grasp user perception, operators mainly use GPS (Global Positioning System) and gyroscopes to test the network of tunnel lines. However, due to the high-sealed nature of current tunnels, GPS signals are shielded, resulting in a large deviation between the tested location information and the actual location, which seriously affects the formulation of network solutions.

[0003] In addition, relevant technicians can also calculate the angle between the manual points and the data points output by the sensor during the network test, and finally confirm the test location point. However, this method relies on sensors and manual points, and in actual production, the work efficiency is low, and the requirements for the staff are high, which is not easy to promote and apply.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present application provide a tunnel terminal positioning method and system, a storage medium, and a positioning device to at least solve the technical problems of the related art in positioning mobile terminals in highly enclosed tunnels, which are difficult to implement and have poor measurement results accuracy.

[0006] According to one aspect of an embodiment of the present application, a tunnel network positioning automatic correction method and system based on signal fingerprint is provided, including: obtaining a measurement report reported by a mobile terminal in a tunnel line and transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line; for each base station, determining the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station based on the transmission parameters of the base station, the first longitude and latitude coordinates of the base station and the measurement report reported by the mobile terminal; determining the target longitude and latitude coordinates of the mobile terminal based on the longitude and latitude coordinate range of the mobile terminal within the coverage of each base station.

[0007] Optionally, the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station is determined based on the transmission parameters of the base station, the first longitude and latitude coordinates of the base station and the measurement report reported by the mobile terminal, including: determining multiple initial distances between the mobile terminal and the base station based on the transmission parameters of the base station and the measurement report reported by the mobile terminal, wherein the transmission parameters include at least one of the following: transmission power, antenna gain, signal transmission loss factor, signal transmission frequency, and the measurement report at least includes: a reference signal receiving power of the mobile terminal receiving the signal transmitted by the base station; determining the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station based on the first longitude and latitude coordinates of the base station, multiple initial distances and the measurement report reported by the mobile terminal.

[0008] Optionally, multiple initial distances between the mobile terminal and the base station are determined based on the transmission parameters of the base station and the measurement report reported by the mobile terminal, including: determining the free space propagation loss value between the base station and the mobile terminal using the transmission power, antenna gain, signal transmission loss factor and the reference signal reception power of the mobile terminal receiving the signal transmitted by the base station; and calculating multiple initial distances between the mobile terminal and the base station based on the free space propagation loss value and the signal transmission frequency and using the free space wireless signal propagation distance attenuation formula.

[0009] Optionally, the first longitude and latitude coordinates include: a first longitude coordinate and a first latitude coordinate, and the measurement report also includes: an azimuth between the mobile terminal and the base station, wherein the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station is determined based on the first longitude and latitude coordinates of the base station, multiple initial distances and the measurement report reported by the mobile terminal, including: determining a longitude and latitude variable set of the mobile terminal based on the first latitude coordinate of the base station, multiple initial distances and the azimuth between the mobile terminal and the base station; determining the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station based on the first longitude and latitude coordinates of the base station and the longitude and latitude variable set of the mobile terminal.

[0010] Optionally, determining the latitude and longitude variable set of the mobile terminal according to the first latitude coordinate of the base station, the multiple initial distances, and the azimuth between the mobile terminal and the base station includes: calculating the latitude and longitude variable set of the mobile terminal according to the first latitude coordinate of the base station, the multiple initial distances, and the azimuth between the mobile terminal and the base station using the following spherical trigonometry formula:

[0011] Δλ=arctan2[sin(θ)tan(Dis / R),cos(θ)]

[0012]

[0013] Wherein, Δλ represents the longitude variable of the mobile terminal, θ represents the azimuth between the base station and the terminal, Dis represents multiple initial distances between the mobile terminal and the base station, R represents the radius of the earth, Δφ represents the latitude variable of the mobile terminal, and Lat represents the first latitude coordinate of the base station.

[0014] Optionally, the target longitude and latitude coordinates of the mobile terminal are determined based on the longitude and latitude coordinate ranges of the mobile terminal within the coverage of each base station, including: determining the intersection of the longitude and latitude coordinate ranges of the mobile terminal within the coverage of each base station, wherein the intersection includes multiple candidate longitude and latitude coordinates of the mobile terminal; determining candidate longitude and latitude coordinates that match a preset database from the multiple candidate longitude and latitude coordinates in the intersection, and using the candidate longitude and latitude coordinates as the target longitude and latitude coordinates of the mobile terminal, wherein the database at least includes: the second longitude and latitude coordinates of each of the multiple key points on the tunnel line and the signal characteristics corresponding to the reference signal receiving power when the mobile terminal is at each second longitude and latitude coordinate to receive the transmitted signal of each base station.

[0015] Optionally, the candidate longitude and latitude coordinates are determined from multiple candidate longitude and latitude coordinates in the intersection that match a preset database, and the candidate longitude and latitude coordinates are used as the target longitude and latitude coordinates of the mobile terminal, including: performing feature extraction on the reference signal receiving power when the mobile terminal in the measurement report receives the signals transmitted by each base station to obtain the corresponding signal features; comparing the feature similarity between the signal features and multiple signal features in the database, and determining the second target longitude and latitude coordinates corresponding to the signal features having a similarity greater than a preset similarity threshold; determining the coordinate distance between the multiple candidate longitude and latitude coordinates in the intersection and the second target longitude and latitude coordinates, and using the candidate longitude and latitude coordinates corresponding to the coordinate distance less than the preset threshold value as the target longitude and latitude coordinates of the mobile terminal.

[0016] According to another aspect of an embodiment of the present application, a tunnel terminal positioning system is also provided, including: an acquisition module, used to acquire a measurement report reported by a mobile terminal in a tunnel line and the transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line; a determination module, used to determine, for each base station, the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station based on the transmission parameters of the base station, the first longitude and latitude coordinates of the base station and the measurement report reported by the mobile terminal; a positioning module, used to determine the target longitude and latitude coordinates of the mobile terminal based on the longitude and latitude coordinate range of the mobile terminal within the coverage of each base station.

[0017] According to another aspect of an embodiment of the present application, a non-volatile storage medium is also provided, which includes a stored computer program, wherein the device where the non-volatile storage medium is located executes the above-mentioned tunnel terminal positioning method by running the computer program.

[0018] According to another aspect of an embodiment of the present application, a computer program product is also provided, which includes a stored computer program, wherein the computer program implements the above-mentioned tunnel terminal positioning method when executed by a processor.

[0019] In the embodiment of the present application, the measurement report reported by the mobile terminal in the tunnel line and the transmission parameters and first longitude and latitude coordinates of the multiple base stations covering the tunnel line are obtained; for each base station, the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station is determined based on the transmission parameters of the base station, the first longitude and latitude coordinates of the base station and the measurement report reported by the mobile terminal; the target longitude and latitude coordinates of the mobile terminal are determined based on the longitude and latitude coordinate range of the mobile terminal within the coverage of each base station. The positioning error of the network test in high-confinement scenarios is reduced, thereby achieving the technical effect of accurately identifying and correcting the position information of the mobile terminal in confined scenarios such as tunnels, improving the accuracy and efficiency of network optimization, and thus solving the technical problem that the related technology is difficult to implement and the measurement result is poor in accuracy when positioning the mobile terminal in a high-confinement tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 is a hardware structure block diagram of an optional computer terminal (or mobile device) according to an embodiment of the present application;

[0022] Figure 2 is a flow chart of an optional tunnel terminal positioning method according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of an optional possible distance set between a terminal and a base station according to an embodiment of the present application;

[0024] Figure 4 is a schematic diagram of an optional set of latitude and longitude coordinate ranges of a mobile terminal under the coverage of each base station according to an embodiment of the present application;

[0025] Figure 5 is a schematic structural diagram of an optional tunnel terminal positioning system according to an embodiment of the present application;

[0026] Figure 6 It is a schematic structural diagram of an optional positioning device according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] In addition, the relevant information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for display, data for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. For example, an interface is set up between this system and the relevant user or organization. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain relevant information after receiving the consent information fed back by the aforementioned user or organization.

[0030] In order to better understand the embodiments of the present application, the technical terms involved in the embodiments of the present application are explained as follows:

[0031] Reference Signal Receiving Power (RSRP): It is a key parameter that can represent the strength of wireless signals in LTE networks and one of the physical layer measurement requirements. It is the average value of the signal power received on the index RE (Resource Element) that carries the reference signal within a symbol.

[0032] Antenna gain: It is the ratio of the square of the field strength of the signal generated by the actual antenna and the ideal radiating unit at the same point in space under the condition of equal input power, that is, the power ratio. It quantitatively describes the degree to which an antenna concentrates the input power for radiation. Therefore, the antenna gain is closely related to the antenna pattern. The narrower the main lobe of the pattern, the smaller the side lobe, and the higher the gain.

[0033] Free Space Loss: refers to the energy loss when electromagnetic waves propagate in the air. Generally, electromagnetic waves will experience loss when penetrating any medium. Among them, wireless devices such as mobile phones, wireless remote controls, wireless routers, Bluetooth, etc. that use spread spectrum and other bandwidth modulation technologies will generate out-of-band emissions and spurious emissions in a wide frequency range outside the carrier frequency. These emissions will interfere with other radio equipment.

[0034] Example 1

[0035] According to an embodiment of the present application, an embodiment of a tunnel terminal positioning method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0036] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Figure 1 FIG. 1 shows a hardware structure block diagram of a computer terminal (or mobile device) for implementing a tunnel terminal positioning method. Figure 1 As shown, the computer terminal 10 (or mobile device 10) may include one or more (102a, 102b, ..., 102n are used to illustrate) processors 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data, and a transmission device 106 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0037] It should be noted that the one or more processors 102 and / or other data processing circuits described above may generally be referred to herein as "data processing circuits". The data processing circuits may be embodied in whole or in part as software, hardware, firmware, or any other combination thereof. In addition, the data processing circuit may be a single independent processing module, or may be incorporated in whole or in part into any of the other components in the computer terminal 10 (or mobile device). As described in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of a variable resistor terminal path connected to an interface).

[0038] The memory 104 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the tunnel terminal positioning method in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, the tunnel terminal positioning method of the above-mentioned application is realized. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the computer terminal 10 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0039] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the computer terminal 10. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0040] The display may be, for example, a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the computer terminal 10 (or mobile device).

[0041] In the above operating environment, Figure 2 is a flow chart of an optional tunnel terminal positioning method according to an embodiment of the present application, such as Figure 2 As shown, the method at least includes steps S202-S206, wherein:

[0042] Step S202, obtaining a measurement report reported by a mobile terminal in the tunnel line and transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line.

[0043] In the technical solution provided in step S202, in the mobile communication network, especially in LTE (Long-Term Evolution) and 5G networks, the terminal will be triggered regularly or based on specific events (such as switching, signal quality changes) to report to the network the signal quality of the surrounding base stations measured. Therefore, when the tunnel terminal positioning system locates the mobile terminal in the tunnel line, it can first obtain the measurement report reported by the mobile terminal, as well as the transmission parameters and first longitude and latitude coordinates of the multiple base stations covering the tunnel line, so as to build a signal propagation model, thereby realizing an accurate estimation of the position of the mobile terminal. Among them, the above-mentioned transmission parameters refer to the relevant information used to describe the specific transmission of the base station wireless signal, also known as the base station engineering parameters (Engineering Parameters) information or wireless parameters, so it can be obtained through the operator's network management platform or the detailed engineering parameters of the base station pre-stored in the database, and can also be verified or supplemented by field testing. The first longitude and latitude coordinates of multiple base stations covering the tunnel line can be obtained through the operator's GIS (Geographic Information System) or network management platform or by organizing a professional team to use GPS positioning equipment to measure the actual position of the base station on site.

[0044] Step S204: for each base station, determine the latitude and longitude coordinate range of the mobile terminal within the coverage range of the base station according to the transmission parameters of the base station, the first latitude and longitude coordinates of the base station, and the measurement report reported by the mobile terminal;

[0045] In the technical solution provided in step S204, the tunnel terminal positioning system can analyze the transmission parameters of the base station and the measurement report reported by the mobile terminal to first determine the (possible) distance between the mobile terminal and each base station; then, combined with the first longitude and latitude coordinates of the base station, further determine the (possible) longitude and latitude coordinate range of the mobile terminal within the coverage range of the base station.

[0046] Step S206, determining the target longitude and latitude coordinates of the mobile terminal according to the longitude and latitude coordinate range of the mobile terminal within the coverage range of each base station.

[0047] In the technical solution provided in step S206, the tunnel terminal positioning system can determine the longitude and latitude coordinate range with the smallest intersection based on the (possible) longitude and latitude coordinate range of the mobile terminal within the coverage range of each base station, and determine the target (precise) longitude and latitude coordinates of the mobile terminal within this range.

[0048] The above method of this embodiment is further introduced below.

[0049] As an optional implementation, in the technical solution provided in the above step S204, the tunnel terminal positioning system can determine the latitude and longitude coordinate range of the mobile terminal within the coverage range of the base station through the following steps, including:

[0050] Step S2041: determine a plurality of initial distances between the mobile terminal and the base station according to the transmission parameters of the base station and the measurement report reported by the mobile terminal.

[0051] The transmission parameters include at least one of the following: transmission power (i.e., base station radio frequency unit transmission power), antenna gain, signal transmission loss factor, and signal transmission frequency. The measurement report includes at least: reference signal receiving power (RSRP) of the mobile terminal receiving the base station transmission signal.

[0052] Therefore, the tunnel terminal positioning system can determine multiple initial distances between the mobile terminal and the base station by the following methods, including:

[0053] Firstly, the free space propagation loss value between the base station and the mobile terminal is determined by using the transmission power, antenna gain, signal transmission loss factor and the reference signal receiving power of the mobile terminal receiving the signal transmitted by the base station.

[0054] The expression of the free space propagation loss value can be written as:

[0055] Ls=(PT+Ga+Rs)*(1+k)

[0056] Where Ls represents the free space propagation loss value; PT represents the transmission power; Ga represents the antenna gain; Rs represents the reference signal receiving power; k represents the signal transmission loss factor, which is determined according to the degree to which the signal is affected by the mountain, the material of the obstacle, etc.

[0057] Then, according to the free space propagation loss value and the signal transmission frequency, a plurality of initial distances between the mobile terminal and the base station are calculated using the free space wireless signal propagation distance attenuation formula.

[0058] The free space wireless signal propagation distance attenuation formula is: Ls = 92.45 + 20log 10 (fa)+20log 10(Dis), where fa represents the signal transmission frequency of the base station (in GHz), and Dis is the free space propagation distance of the wireless signal (in Km). Based on the above formula, when the free space propagation loss value Ls is known, Dis can be inferred using the following formula:

[0059]

[0060] Therefore, the above distance Dis and integer multiples of the distance Dis (Dis*2, Dis*3, ..., Dis*n) can be used as multiple initial distances between the base station and the mobile terminal as multiple initial distances (i.e., distance sets) between the mobile terminal and each base station.

[0061] For example, Figure 3 is a schematic diagram of a possible distance set between a terminal and a base station according to an optional embodiment of the present application, such as Figure 3 The tunnel includes multiple base stations A1, A2, B1, B2, C1, etc. Through the above step S2041, the distance set Dis(a1) between the mobile terminal and the base station A1, the distance set Dis(a2) between the mobile terminal and the base station A2, the distance set Dis(b1) between the mobile terminal and the base station B1, the distance set Dis(b1) between the mobile terminal and the base station B2, etc. can be determined.

[0062] Step S2042: Determine the latitude and longitude coordinate range of the mobile terminal within the coverage of the base station according to the first latitude and longitude coordinates of the base station, multiple initial distances, and the measurement report reported by the mobile terminal.

[0063] The first longitude and latitude coordinates include: a first longitude coordinate and a first latitude coordinate, and the measurement report also includes: an azimuth between the mobile terminal and the base station.

[0064] Therefore, the tunnel terminal positioning system can determine the latitude and longitude coordinate range of the mobile terminal within the coverage area of ​​the base station by the following methods, including:

[0065] In the first step, a latitude and longitude variable set of the mobile terminal is determined according to the first latitude coordinate of the base station, a plurality of initial distances and the azimuth angle between the mobile terminal and the base station.

[0066] Specifically, the tunnel terminal positioning system can calculate the longitude and latitude variable set of the mobile terminal based on the first latitude coordinate of the base station, multiple initial distances and the azimuth between the mobile terminal and the base station, and using the following spherical trigonometry formula:

[0067] Δλ=arctan2[sin(θ)tan(Dis / R),cos(θ)]

[0068]

[0069] Wherein, Δλ represents the longitude variable of the mobile terminal, θ represents the azimuth between the base station and the terminal, Dis represents multiple initial distances between the mobile terminal and the base station, R represents the radius of the earth, Δφ represents the latitude variable of the mobile terminal, and Lat represents the first latitude coordinate of the base station.

[0070] The second step is to determine the latitude and longitude coordinate range of the mobile terminal within the coverage of the base station based on the first latitude and longitude coordinates of the base station and the latitude and longitude variable set of the mobile terminal.

[0071] Specifically, the tunnel terminal positioning system can determine the latitude and longitude coordinate range of the mobile terminal within the coverage range of the base station according to the following formula:

[0072] Lon ′ =Lon+Δλ

[0073] Lat ′ =Lat+Δφ

[0074] Among them, Lon ′ Indicates the longitude coordinate of the mobile terminal within the coverage area of ​​the base station, Lat ′ Indicates the latitude coordinates of the mobile terminal within the coverage area of ​​the base station.

[0075] Therefore, the candidate longitude and latitude coordinates L1 (Lon ′ *1,Lat ′ *1) and the integer multiple L2 (Lon ′ *2,Lat ′ *2),L3(Lon ′ *3,Lat ′ *3),…,L n (Lon ′ *n,Lat ′ *n) as multiple possible longitude and latitude coordinate ranges (i.e., possible location longitude and latitude sets) of the mobile terminal within the coverage area of ​​the base station.

[0076] For example, Figure 4 is a schematic diagram of an optional set of latitude and longitude coordinate ranges of a mobile terminal under the coverage of each base station according to an embodiment of the present application, such as Figure 4 The tunnel includes multiple base stations A1, A2, B1, B2, C1, etc. Through the above step S2042, the latitude and longitude coordinate range set of the mobile terminal under the coverage of base station A1 can be determined: S(a1)=[L1(Lona1 ′ *1,Lata1 ′ *1),L2(Lona1 ′ *2,Lata1 ′*2),L3(Lona1 ′ *3,Lata1 ′ *3),…,L n (Lona1 ′ *n,Lata1 ′ *n)] The latitude and longitude coordinate range set of the mobile terminal and the terminal under the coverage of base station A2: S(a2) = [L1(Lona2 ′ *1,Lata2 ′ *1),L2(Lona2 ′ *2,Lata2 ′ *2),L3(Lona2 ′ *3,Lata2 ′ *3),…,L n (Lona2 ′ *n,Lata2 ′ *n)], etc.

[0077] After obtaining the latitude and longitude coordinate range of the mobile terminal within the coverage range of each base station through the above steps S2041-S2042, the tunnel terminal positioning system can also determine the target longitude and latitude coordinates of the mobile terminal through the following method, including:

[0078] Step S2081, determining the intersection of the latitude and longitude coordinate ranges of the mobile terminal within the coverage range of each base station. The above intersection can be understood as the number of latitude and longitude coordinate points shared between the latitude and longitude coordinate ranges of the mobile terminal within the coverage range of each base station, and therefore, the intersection includes multiple candidate latitude and longitude coordinates of the mobile terminal.

[0079] Step S2082, determining candidate longitude and latitude coordinates that match a preset database from the multiple candidate longitude and latitude coordinates in the intersection, and using the candidate longitude and latitude coordinates as the target longitude and latitude coordinates of the mobile terminal.

[0080] Specifically, in the early tunnel test or network optimization process, the wireless signal characteristics (including but not limited to RSRP values) of each key point and the corresponding actual longitude and latitude coordinates are collected and recorded to build a database. Therefore, the database is equivalent to a "map" to correspond the signal characteristics of a specific location to the actual coordinates. It includes at least the second longitude and latitude coordinates of each of the key points on the tunnel line and the signal characteristics corresponding to the reference signal received power when the mobile terminal is at each second longitude and latitude coordinate to receive the signal transmitted by each base station. Among them, the above-mentioned key points of the line usually refer to points with special geographical significance in the tunnel structure or have a significant impact on the propagation of communication network signals, including but not limited to: entrances, exits, turning points, starting and ending points of straight sections, vents, emergency exits, inspection ports, etc. Therefore, the above-mentioned database can be immediately a fingerprint database, that is, the signal strength and other wireless parameters of each key point position in the tunnel are extracted to form a "fingerprint", and these "fingerprints" are associated with the second longitude and latitude coordinates of the corresponding key points to form a fingerprint database.

[0081] Therefore, the tunnel terminal positioning system can use the fingerprint positioning algorithm and determine the target longitude and latitude coordinates of the mobile terminal from the intersection according to the following method, including:

[0082] First, feature extraction is performed on the reference signal receiving power when the mobile terminal receives the signals transmitted by each base station in the measurement report to obtain the corresponding signal features;

[0083] Then, the signal feature is compared with the feature similarity between multiple signal features in the database, and the second target longitude and latitude coordinates corresponding to the signal feature whose similarity is greater than a preset similarity threshold are determined;

[0084] Finally, the coordinate distance between the plurality of candidate longitude and latitude coordinates in the intersection and the second target longitude and latitude coordinates is determined, and the candidate longitude and latitude coordinates corresponding to the coordinate distance being less than a preset threshold value are used as the target longitude and latitude coordinates of the mobile terminal.

[0085] The main idea of ​​the above determination process is: by comparing the real-time measured signal features (to reflect the wireless environment state of the current mobile terminal) with the known signal features stored in the database, the longitude and latitude coordinates with similar signal features can be determined from the database, where the similarity can be calculated by a variety of metrics, such as Euclidean distance, Manhattan distance, etc.; then the multiple candidate longitude and latitude coordinates in the intersection are screened by distance with the determined longitude and latitude coordinates to obtain the candidate longitude and latitude coordinates with the closest distance, and use them as the target longitude and latitude coordinates of the mobile terminal. Among them, by using the propagation characteristics of wireless signals as the basis for positioning, the limitations of GPS signals in closed environments are avoided. In addition, by building and using the location fingerprint library, it is possible to quickly match and accurately locate, especially in specific scenarios such as tunnels, and can provide accurate and reliable positioning services, which is of great value for network optimization and problem location. The core of this method is to convert the characteristics of wireless signals into spatial location information, and finally determine the precise location of the mobile terminal through feature matching and distance screening, thereby providing strong support for network quality improvement, troubleshooting and security management.

[0086] Based on the scheme defined by the above steps S202 to S206, it can be known that in the embodiment, the tunnel terminal positioning system collects the current measurement report of the mobile terminal, the transmission parameters of the multiple base stations of the tunnel line and the first longitude and latitude coordinates to analyze, so as to determine the longitude and latitude coordinate range of the mobile terminal within the coverage range of each base station; then, according to the preset database, the target longitude and latitude coordinates of the mobile terminal are determined from the longitude and latitude coordinate range of the mobile terminal within the coverage range of each base station, thereby realizing the automatic deviation correction positioning of the precise position of the mobile terminal in the GPS signal restricted environment such as the tunnel. It achieves the purpose of providing high-precision and high-reliability mobile terminal positioning in closed environments such as tunnels, and provides strong support for improving network service quality, optimizing network coverage and troubleshooting network problems. At the same time, it reduces the dependence on GPS positioning, solves the problem of weak or no GPS signal in the tunnel scene, and provides a new positioning means for network optimization and troubleshooting. In addition, the present application scheme does not need to carry complex positioning equipment, and only needs the signal measurement data of the mobile terminal to achieve positioning, which reduces the test cost and improves the test efficiency.

[0087] Example 2

[0088] Based on the first embodiment of the present application, an embodiment of a tunnel terminal positioning system is also provided, and the system executes the tunnel terminal positioning method of the above embodiment when it is running. Figure 5 is a schematic diagram of the structure of an optional tunnel terminal positioning system according to an embodiment of the present application, such as Figure 5As shown, the tunnel terminal positioning system at least includes: an acquisition module 52, a determination module 54 and a positioning module 56, wherein:

[0089] An acquisition module 52 is used to acquire a measurement report reported by a mobile terminal in a tunnel line and transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line;

[0090] A determination module 54 is used to determine, for each base station, a latitude and longitude coordinate range of the mobile terminal within the coverage range of the base station according to the transmission parameters of the base station, the first latitude and longitude coordinates of the base station and the measurement report reported by the mobile terminal;

[0091] The positioning module 56 is used to determine the target longitude and latitude coordinates of the mobile terminal according to the longitude and latitude coordinate range of the mobile terminal within the coverage range of each base station.

[0092] It should be noted that the various modules in the above-mentioned tunnel terminal positioning system can be program modules (for example, a set of program instructions that implement a certain specific function) or hardware modules. For the latter, it can be expressed in the following forms, but is not limited to this: the expression form of each of the above-mentioned modules is a processor, or the functions of each of the above-mentioned modules are implemented by a processor.

[0093] Example 3

[0094] According to an embodiment of the present application, a non-volatile storage medium is also provided, in which a program is stored, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute the tunnel terminal positioning method in Example 1.

[0095] Optionally, the device where the non-volatile storage medium is located implements the following steps by running the program: obtaining a measurement report reported by a mobile terminal in a tunnel line and transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line; for each base station, determining the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station based on the transmission parameters of the base station, the first longitude and latitude coordinates of the base station and the measurement report reported by the mobile terminal; determining the target longitude and latitude coordinates of the mobile terminal based on the longitude and latitude coordinate range of the mobile terminal within the coverage of each base station.

[0096] According to an embodiment of the present application, a computer program product is also provided, which includes a stored computer program, wherein when the computer program is executed by a processor, the tunnel terminal positioning method in Example 1 is implemented.

[0097] Optionally, the computer program executes the following steps: obtaining a measurement report reported by a mobile terminal in a tunnel line and transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line; for each base station, determining a range of longitude and latitude coordinates of the mobile terminal within the coverage of the base station based on the transmission parameters of the base station, the first longitude and latitude coordinates of the base station and the measurement report reported by the mobile terminal; and determining the target longitude and latitude coordinates of the mobile terminal based on the range of longitude and latitude coordinates of the mobile terminal within the coverage of each base station.

[0098] According to an embodiment of the present application, a processor is also provided, which is used to run a program, wherein the tunnel terminal positioning method in Example 1 is executed when the program is running.

[0099] Optionally, when the program is running, the following steps are executed: obtaining a measurement report reported by a mobile terminal in a tunnel line and the transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line; for each base station, determining the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station based on the transmission parameters of the base station, the first longitude and latitude coordinates of the base station and the measurement report reported by the mobile terminal; determining the target longitude and latitude coordinates of the mobile terminal based on the longitude and latitude coordinate range of the mobile terminal within the coverage of each base station.

[0100] According to an embodiment of the present application, a positioning device is also provided, wherein: Figure 6 is a schematic diagram of the structure of an optional positioning device according to an embodiment of the present application, such as Figure 6 As shown, the positioning device includes one or more processors; a memory for storing one or more programs, which, when the one or more programs are executed by the one or more processors, enables the one or more processors to run the programs, wherein the programs are configured to execute the tunnel terminal positioning method in the above-mentioned embodiment 1 when running.

[0101] Optionally, the processor is configured to execute the following steps through a computer program: obtaining a measurement report reported by a mobile terminal in a tunnel line and transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line; for each base station, determining the longitude and latitude coordinate range of the mobile terminal within the coverage of the base station based on the transmission parameters of the base station, the first longitude and latitude coordinates of the base station and the measurement report reported by the mobile terminal; and determining the target longitude and latitude coordinates of the mobile terminal based on the longitude and latitude coordinate range of the mobile terminal within the coverage of each base station.

[0102] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0103] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0104] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0105] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0106] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0107] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the relevant technology or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0108] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A tunnel terminal positioning method, characterized in that: include: Obtaining a measurement report reported by a mobile terminal in a tunnel line and transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line; For each of the base stations, determine the latitude and longitude coordinate range of the mobile terminal within the coverage range of the base station according to the transmission parameters of the base station, the first latitude and longitude coordinates of the base station and the measurement report reported by the mobile terminal; The target longitude and latitude coordinates of the mobile terminal are determined according to the longitude and latitude coordinate range of the mobile terminal within the coverage range of each base station.

2. The method according to claim 1, characterized in that Determining the latitude and longitude coordinate range of the mobile terminal within the coverage range of the base station according to the transmission parameter of the base station, the first latitude and longitude coordinates of the base station, and the measurement report reported by the mobile terminal includes: Determine a plurality of initial distances between the mobile terminal and the base station according to a transmission parameter of the base station and a measurement report reported by the mobile terminal, wherein the transmission parameter includes at least one of the following: transmission power, antenna gain, signal transmission loss factor, and signal transmission frequency, and the measurement report includes at least: a reference signal receiving power at which the mobile terminal receives a signal transmitted by the base station; The longitude and latitude coordinate range of the mobile terminal within the coverage of the base station is determined according to the first longitude and latitude coordinates of the base station, the multiple initial distances and the measurement report reported by the mobile terminal.

3. The method according to claim 2, characterized in that Determining a plurality of initial distances between the mobile terminal and the base station according to the transmission parameter of the base station and the measurement report reported by the mobile terminal includes: Determine a free space propagation loss value between the base station and the mobile terminal using the transmit power, the antenna gain, the signal transmission loss factor, and a reference signal reception power at which the mobile terminal receives the signal transmitted by the base station; According to the free space propagation loss value and the signal transmission frequency, a plurality of initial distances between the mobile terminal and the base station are calculated using a free space wireless signal propagation distance attenuation formula.

4. The method according to claim 2, characterized in that: The first longitude and latitude coordinates include: a first longitude coordinate and a first latitude coordinate, and the measurement report also includes: an azimuth between the mobile terminal and the base station, wherein determining the longitude and latitude coordinate range of the mobile terminal within the coverage range of the base station according to the first longitude and latitude coordinates of the base station, the multiple initial distances, and the measurement report reported by the mobile terminal includes: Determining a latitude and longitude variable set of the mobile terminal according to the first latitude coordinate of the base station, the multiple initial distances, and the azimuth angle between the mobile terminal and the base station; The latitude and longitude coordinate range of the mobile terminal within the coverage of the base station is determined according to the first latitude and longitude coordinates of the base station and the latitude and longitude variable set of the mobile terminal.

5. The method according to claim 4, characterized in that Determining a latitude and longitude variable set of the mobile terminal according to the first latitude coordinate of the base station, the multiple initial distances, and the azimuth between the mobile terminal and the base station, comprising: According to the first latitude coordinate of the base station, the multiple initial distances and the azimuth between the mobile terminal and the base station, the latitude and longitude variable set of the mobile terminal is calculated using the following spherical trigonometry formula: Δλ=arctan2[sin(θ)tan(Dis / R),cos(θ)] In the formula, Δλ represents the longitude variable of the mobile terminal, θ represents the azimuth between the base station and the terminal, Dis represents multiple initial distances between the mobile terminal and the base station, R represents the radius of the earth, Δφ represents the latitude variable of the mobile terminal, and Lat represents the first latitude coordinate of the base station.

6. The method according to claim 1, characterized in that Determining the target longitude and latitude coordinates of the mobile terminal according to the longitude and latitude coordinate range of the mobile terminal within the coverage range of each base station includes: Determine an intersection of the latitude and longitude coordinate ranges of the mobile terminal within the coverage ranges of the base stations, wherein the intersection includes a plurality of candidate longitude and latitude coordinates of the mobile terminal; Determine candidate longitude and latitude coordinates that match a preset database from the multiple candidate longitude and latitude coordinates in the intersection, and use the candidate longitude and latitude coordinates as the target longitude and latitude coordinates of the mobile terminal, wherein the database at least includes: the second longitude and latitude coordinates of each of the multiple key points on the tunnel line and the signal characteristics corresponding to the reference signal receiving power when the mobile terminal is at each of the second longitude and latitude coordinates to receive the signals transmitted by each of the base stations.

7. The method according to claim 6, characterized in that Determining a candidate longitude and latitude coordinate that matches a preset database from a plurality of candidate longitude and latitude coordinates in the intersection, and using the candidate longitude and latitude coordinates as the target longitude and latitude coordinates of the mobile terminal, including: Extracting features of the reference signal received power when the mobile terminal receives the signals transmitted by each base station in the measurement report to obtain corresponding signal features; Comparing the feature similarity between the signal feature and a plurality of signal features in the database, and determining the second target longitude and latitude coordinates corresponding to the signal feature having a similarity greater than a preset similarity threshold; The coordinate distance between the plurality of candidate longitude and latitude coordinates in the intersection and the second target longitude and latitude coordinates is determined, and the candidate longitude and latitude coordinates corresponding to the coordinate distance being less than a preset threshold value are used as the target longitude and latitude coordinates of the mobile terminal.

8. A tunnel terminal positioning system, characterized in that: include: An acquisition module, used to acquire a measurement report reported by a mobile terminal in a tunnel line and transmission parameters and first longitude and latitude coordinates of each of a plurality of base stations covering the tunnel line; A determination module, configured to determine, for each of the base stations, a range of longitude and latitude coordinates of the mobile terminal within a coverage range of the base station according to a transmission parameter of the base station, a first longitude and latitude coordinate of the base station, and a measurement report reported by the mobile terminal; The positioning module is used to determine the target longitude and latitude coordinates of the mobile terminal according to the longitude and latitude coordinate range of the mobile terminal within the coverage range of each base station.

9. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a computer program, wherein the device where the non-volatile storage medium is located executes the tunnel terminal positioning method described in any one of claims 1 to 7 by running the computer program.

10. A positioning device, characterized in that: include: A memory and a processor, wherein the processor is used to run a program stored in the memory, wherein the program, when running, executes the tunnel terminal positioning method described in any one of claims 1 to 7.

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