A composite area positioning method and system

Abstract

The present invention relates to the field of radio technology, and in particular, to a composite area positioning method and system. The composite area positioning method includes: based on the position offset rule, translating the position coordinates of the real base station along the extension direction of the second positioning dimension and generating the position coordinates of the virtual base station; obtaining the information offset rule according to the position coordinates of the real base station and the virtual base station; generating the first positioning information after the real base station receives the signal of the tag, and generating the second positioning information of the virtual base station according to the first positioning information and based on the information offset rule; based on the first positioning information and the second positioning information, calculating the position of the tag according to the positioning algorithm of the two-dimensional positioning area. This solves the problem that it is difficult to determine the area type at the intersection within the composite area and the positioning accuracy is poor.

Description

Technical Field

[0001] The present invention relates to the field of radio technology, and in particular to a composite area positioning method and system. Background Art

[0002] Ultra Wide Band (UWB) technology is a wireless carrier communication technology that does not use a sinusoidal carrier but uses nanosecond non-sinusoidal narrow pulses to transmit data, so it occupies a wide spectrum range. UWB technology has the advantages of low system complexity, low power spectrum density of transmitted signals, insensitivity to channel fading, low interception capability, and high positioning accuracy. It is especially suitable for high-speed wireless access in dense multipath places such as indoors.

[0003] UWB technology usually uses a base station to receive the tag's signal and generate information that is uploaded to a solution center, which processes and calculates the information to determine the tag's location.

[0004] In an automated factory workshop, there are usually many types of areas in one space, such as high-shelf aisles, production line aisles, offices, ground aisles, open areas, etc. Due to different positioning requirements, the base station deployment methods and positioning algorithms used in each type of area are different. For example, high-shelf aisles require a single row and base stations to be deployed at the corners to achieve at least 2 base stations 1D positioning, and open areas require double rows of base stations at a certain distance to achieve at least 3 base stations 1D / 2D positioning, etc. At the intersection of two areas (for example, the intersection of an open area and a high-shelf aisle), it is necessary to determine the area type and use the corresponding area's positioning algorithm to calculate the coordinates. The accuracy of this area judgment is not high, which affects the positioning accuracy. Summary of the invention

[0005] In order to solve the problem that it is difficult to determine the area type at the intersection within the composite area and the positioning accuracy is poor, the present invention provides a composite area positioning method and system.

[0006] A composite area positioning method comprises the following steps:

[0007] The composite area includes a one-dimensional positioning area and a two-dimensional positioning area. The one-dimensional positioning area has a one-dimensional coordinate system set based on a first positioning dimension. The one-dimensional positioning area includes multiple real base stations spaced apart along the extension direction of the first positioning dimension. When the tag is located in the one-dimensional positioning area, at least two real base stations can receive the signal sent by the tag; the two-dimensional positioning area includes a positioning coordinate system composed of a first positioning dimension and a second positioning dimension, and the second positioning dimension and the first positioning dimension have an angle greater than 0 degrees and less than 180 degrees; based on the position offset rule, the position coordinates of the real base station are translated along the extension direction of the second positioning dimension and the position coordinates of the virtual base station are generated; the information offset rule is obtained according to the position coordinates of the real base station and the virtual base station; the first positioning information is generated after the real base station receives the signal of the tag, and the second positioning information of the virtual base station is generated according to the first positioning information and the information offset rule; based on the first positioning information and the second positioning information, the position of the tag is calculated according to the positioning algorithm of the two-dimensional positioning area.

[0008] In some embodiments, according to the numbering information of the real base station, based on the numbering offset rule, the numbering information of the virtual base station corresponding to the real base station is generated.

[0009] In some embodiments, when the real base station is a synchronous base station, the first positioning information includes the first synchronization time and the tag signal time; at this time, the second positioning information generated based on the first positioning information includes the second synchronization time and the tag signal time; the information offset rule includes a first offset rule corresponding to the synchronous base station, and the first offset rule is: the first synchronization time is equal to the second synchronization time.

[0010] In some embodiments, when the real base station is a non-synchronous base station, the non-synchronous base station can receive the synchronization signal sent by the synchronous base station. At this time, the first positioning information includes a third synchronization time and a label signal time. The third synchronization time is the time when the synchronization signal sent by the synchronous base station is received, and the second positioning information is generated. The second positioning information includes a fourth synchronization time and a label signal time; the information offset rule also includes a second offset rule corresponding to the non-synchronous base station, and the fourth synchronization time is obtained based on the second offset rule.

[0011] In some embodiments, the second offset rule is: the fourth synchronization time is equal to T+(D2-D1) / c, where T is the third synchronization time, D1 is the distance between the real base station sending the synchronization signal and the real base station of the non-synchronous base station type, D2 is the distance between the real base station sending the synchronization signal and the virtual base station, and c is the speed of light.

[0012] In some embodiments, a real base station generates at least one virtual base station.

[0013] In some embodiments, the angle between the second positioning dimension and the first positioning dimension is 90 degrees.

[0014] The second aspect of the present application also provides a composite area positioning system for the above-mentioned composite area positioning method, including a solution center, multiple first real base stations located in a one-dimensional positioning area, and multiple second real base stations located in a two-dimensional positioning area. The first real base station and the second real base station can both be communicatively connected to the solution center; the first real base station and the second real base station can receive the positioning signal emitted by the tag and upload it to the solution center.

[0015] In some embodiments, the solution center can generate a corresponding virtual base station based on the information uploaded by the first real base station.

[0016] In some embodiments, the solution center includes a receiving module and a calculation module for receiving information uploaded by the first real base station and the second real base station; the calculation module is used to solve the location information of the tag according to the data received by the receiving module.

[0017] In order to solve the problem that it is difficult to determine the area type at the intersection within the composite area and the positioning accuracy is poor, the present invention has the following advantages: by offsetting the real base station in the one-dimensional positioning area along the direction of the second positioning dimension based on the position offset rule and the information offset rule, a corresponding virtual base station and the corresponding position coordinates and the second positioning information are generated, so that the position of the tag can be calculated through the positioning algorithm of the two-dimensional positioning area, thereby converting the original need to determine the area type in the composite area and then calculate the position through the corresponding algorithm to only use the positioning algorithm of the two-dimensional positioning area to calculate the position of the tag, avoiding the step of determining the area type first, and being able to correctly generate the position coordinates of the tag, thereby improving the positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A flow chart showing an embodiment of the composite area positioning method described in the present application is shown;

[0019] Figure 2 A schematic diagram of an embodiment of the composite area positioning system described in the present application is shown.

[0020] Figure numerals: 10 - one-dimensional positioning area, 11 - high-level shelf, 20 - two-dimensional positioning area, 30 - transition area, 40 - first real base station, 41 - virtual base station, 50 - second real base station. DETAILED DESCRIPTION

[0021] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0022] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0023] This embodiment discloses a composite area positioning method, such as Figure 1 and Figure 2 As shown, the composite area positioning method may include:

[0024] The composite area includes a one-dimensional positioning area 10 and a two-dimensional positioning area 20. The one-dimensional positioning area 10 has a one-dimensional coordinate system set based on a first positioning dimension. The one-dimensional positioning area 10 includes multiple real base stations spaced apart along the extension direction of the first positioning dimension. When the tag is located in the one-dimensional positioning area 10, at least two real base stations can receive the signal sent by the tag; the two-dimensional positioning area 20 includes a positioning coordinate system composed of a first positioning dimension and a second positioning dimension, and the second positioning dimension and the first positioning dimension have an angle greater than 0 degrees and less than 180 degrees; based on the position offset rule, the position coordinates of the real base station are translated along the extension direction of the second positioning dimension and the position coordinates of the virtual base station 41 are generated; the information offset rule is obtained according to the position coordinates of the real base station and the virtual base station 41; the first positioning information is generated after the real base station receives the signal of the tag, and the second positioning information of the virtual base station 41 is generated according to the first positioning information and based on the information offset rule; based on the first positioning information and the second positioning information, the position of the tag is calculated according to the positioning algorithm of the two-dimensional positioning area 20.

[0025] It should be noted that Figure 2 Only some virtual base stations 41 are shown in the figure for example, which should not be regarded as a limitation of the present application, and the virtual base stations 41 in the figure do not exist in reality, and are only shown here for the sake of convenience. Figure 2 The Y coordinate axis in represents the first positioning dimension, and the X coordinate axis represents the second positioning dimension.

[0026] Tags can be set on objects or people that need to be located, and can send positioning signals. After receiving the signal, the base station can calculate the distance through the time difference. The signals of the same tag received by multiple base stations can be used to calculate the specific location of the required tag. In addition, the distance difference of the tag relative to each base station can be calculated by the time difference of receiving the tag signal, and the actual location of the tag can be further calculated by the algorithm. The above calculation process can be completed by the solution center connected to the real base station communication. The solution center can be a computer, server or other equipment or device with computing power and execution of solution algorithms. The above positioning refers to positioning within the plane and does not include positioning in the height direction.

[0027] The one-dimensional positioning area 10 refers to an area where the label only needs to be positioned in a single dimension (linear coordinates), such as Figure 2As shown, the area is usually the aisle of the high shelf 11, the aisle of the production line, etc. In this type of area, it usually includes multiple parallel channels. Since the specific channel where the label is located can be directly obtained, it is usually only necessary to locate the coordinate position of the label in the extension direction of the channel, and there is no need to locate the position of the label in the width direction of the aisle. Therefore, in this area, usually only a plurality of base stations are set at intervals directly above the aisle for positioning, and the positioning method usually only requires two base stations to receive the signal sent by the label, and calculate the position of the label in the extension direction of the aisle through the solution center.

[0028] The two-dimensional positioning area 20 refers to the positioning of the label in a plane coordinate system composed of two coordinate axes, such as Figure 2 As shown, the positioning result includes the coordinate position of the tag on the two coordinate axes. The area is usually an office, an open area, etc., and there is no aisle that can be used to distinguish the specific location. Therefore, the positioning of the tag in the area requires the ability to obtain its specific coordinates on the two coordinate axes of the plane coordinate system. In this area, at least three base stations are required to measure the position of the tag by triangulation, and the specific coordinates of the tag in the two-dimensional positioning area 20 are calculated by the solution center. Among them, the plane coordinate system can be a rectangular coordinate system, and an oblique coordinate system can also be selected according to the situation.

[0029] Since there are one-dimensional positioning area 10 and two-dimensional positioning area 20 in the composite area, it is inevitable that a transition area 30 will be generated between the one-dimensional positioning area 10 and the two-dimensional positioning area 20, and there is also a difference in the number of base station receiving information required for calculating the tag position in the one-dimensional positioning area 10 and the two-dimensional positioning area 20. Therefore, completely different positioning algorithms need to be used in the one-dimensional positioning area 10 and the two-dimensional positioning area 20. In the prior art, it is necessary to first determine which area the tag is in, and then calculate the tag position through the corresponding algorithm. However, for the transition area 30 located between the two, it is difficult to define the area to which it belongs, and naturally it is difficult to calculate the tag position in this area. At present, in order to solve this problem, the usual way is to compress the area occupied by the transition area 30 as much as possible, but this way, on the one hand, requires the deployment of more base stations, which increases the construction volume and product costs, and on the other hand, no matter how the area of ​​the transition area 30 is compressed, the transition area 30 will still exist, and it cannot effectively solve the problem.

[0030] In the present application, by shifting the real base station in the one-dimensional positioning area 10 along the direction of the second positioning dimension based on the position shift rule and the information shift rule, a corresponding virtual base station 41 and the corresponding position coordinates and second positioning information are generated. According to the above description, the positioning algorithm in the one-dimensional positioning area 10 usually only needs the information of two base stations, which cannot meet the requirement that the two-dimensional positioning area 20 needs at least the information of three base stations for calculation. However, the information of the generated virtual base station 41 can meet the information quantity requirement of the positioning algorithm of the two-dimensional positioning area 20, so that the location of the tag can be calculated by the positioning algorithm of the two-dimensional positioning area 20. With the above method, there is no need to determine the area where the tag is located, so that the location calculation by the corresponding algorithm in the composite area, which originally needs to determine the area type first, is converted into the location calculation of the tag only by using the positioning algorithm of the two-dimensional positioning area 20, eliminating the step of determining the area type first, and can correctly generate the location coordinates of the tag, thereby improving the positioning accuracy of the tag in the transition area 30.

[0031] Among them, the actual position of the real base station is offset based on the position offset rule so that the generated virtual base station 41 does not overlap with the position of the real base station that actually exists, so as to prevent errors in the calculation process. In the position offset rule, the position of the real base station is translated along the extension direction of the second positioning dimension so that the distribution mode of the generated virtual base station 41 and the real base station conforms to the distribution mode of the base station in the two-dimensional positioning area 20, so that the positioning algorithm of the two-dimensional positioning area 20 can be used in the entire composite area. The second positioning dimension and the first positioning dimension have an angle greater than 0 degrees and less than 180 degrees, which can cause a certain misalignment between the generated virtual base station 41 and the real base station; since the information actually transmitted by the base station to the solution center usually includes the time information of the tag signal received by it and the time information of the base station synchronization signal received by it, the two times can be used to calculate the coordinates of the tag. Since the virtual base station 41 does not really exist, the information it sends can be obtained based on the information offset rule according to the information to be uploaded to the solution center by the corresponding real base station, and the derivation process can be obtained by the solution center by executing the program.

[0032] In some embodiments, according to the numbering information of the real base station and based on the numbering offset rule, the numbering information of the virtual base station 41 corresponding to the real base station is generated.

[0033] Generally speaking, the label position is solved by the solution center, which communicates with a large number of real base stations and receives information at the same time. In order to distinguish these information, the solution center can distinguish them according to the numbers of the real base stations. When the solution center generates the virtual base station 41, in order to distinguish them, it can generate the corresponding number of the virtual base station 41 according to the number of the real base station based on the number offset rule, wherein the number offset rule can be to increment the first few digits in the number of the real base station, add characters to the number, etc., and the staff or the solution center can also identify whether it is a real base station or a virtual base station 41 according to the number offset rule.

[0034] In actual use, the positioning of the tag can be calculated using the TDOA positioning principle, wherein the base station can be divided into a synchronous base station and an asynchronous base station, and the asynchronous base station can receive the synchronization signal of the synchronous base station to eliminate the positioning accuracy error caused by the error of the clock of each base station, so as to improve the positioning accuracy. Among them, when the real base station is a synchronous base station, the first positioning information includes the first synchronization time and the tag signal time; at this time, the second positioning information generated based on the first positioning information includes the second synchronization time and the tag signal time; the information offset rule includes the first offset rule corresponding to the synchronous base station, and the first offset rule is: the first synchronization time is equal to the second synchronization time. Among them, the tag signal time refers to the time when the base station receives the positioning signal sent by the tag, and the first synchronization time is the time when the real base station sends the synchronization signal. For the real base station that is itself a synchronous base station type, the corresponding virtual base station 41 can also be considered as a synchronous base station. Therefore, the second positioning information of the virtual base station 41 can be the same as the first positioning information of the corresponding real base station. The second synchronization time is the same as the first synchronization time, that is, it can be considered that the virtual base station and the real base station send the synchronization signal at the same time.

[0035] When the real base station is a asynchronous base station, the asynchronous base station can receive the synchronization signal sent by the synchronous base station. At this time, the first positioning information includes the third synchronization time and the label signal time. The third synchronization time is the time when the asynchronous base station receives the synchronization signal sent by the synchronous base station, and generates the second positioning information. The second positioning information includes the fourth synchronization time and the label signal time; the information offset rule also includes a second offset rule corresponding to the asynchronous base station, and the fourth synchronization time is obtained based on the second offset rule.

[0036] When the real base station is a non-synchronous base station, since the non-synchronous base station needs to receive the signal of the synchronous base station to eliminate the time difference with the synchronous base station, the non-synchronous base station can receive the synchronization signal of the synchronous base station and generate a third synchronization time. The third synchronization time is the time when the non-synchronous base station receives the synchronization signal. Since the distance between the non-synchronous base station and the synchronous base station that sends the synchronization signal is known, the signal propagation time difference is calculated, and the time difference between the non-synchronous base station and the synchronous base station is further calculated, thereby eliminating the time difference with the synchronous base station. The above calculation process can be performed in the solution center, that is, the solution center includes and can call the value of the distance between a specific synchronous base station and the non-synchronous base station. Therefore, due to the position deviation between the virtual base station 41 and the real base station, the fourth synchronization time of the virtual base station 41 needs to be offset on the basis of the third synchronization time. The fourth synchronization time refers to the time when the virtual base station 41 of the non-synchronous base station type receives the synchronization signal.

[0037] Specifically, the second offset rule is: the fourth synchronization time is equal to T+(D2-D1) / c, where T is the third synchronization time, D1 is the distance between the real base station sending the synchronization signal and the real base station of the non-synchronous base station type, D2 is the distance between the real base station sending the synchronization signal and the virtual base station (a virtual base station generated based on the real base station of the non-synchronous base station type), and c is the speed of light. The above distances are all straight-line distances in a two-dimensional plane composed of the first positioning dimension and the second positioning dimension.

[0038] For the one-dimensional positioning area 10, the signal sent by the tag can usually be received by at least two base stations. Therefore, in order to meet the positioning algorithm requirements of the two-dimensional positioning area 20, the number of virtual base stations 41 can be set to half the number of real base stations (rounded up). This method can reduce the amount of calculation when the solution center generates virtual base stations 41, but this method also needs to select some real base stations to generate their corresponding virtual base stations 41 for calculation according to actual conditions. In order to simplify the generation rules of real base stations to generate virtual base stations 41, it can be set to generate at least one virtual base station 41 for real base stations.

[0039] That is, all real base stations in the one-dimensional positioning area 10 generate a virtual base station 41. At this time, information of at least four base stations can be used to calculate the tag position, which fully meets the requirements of the positioning algorithm. Specifically, more virtual base stations 41 can also be generated according to actual conditions.

[0040] As a specific implementation, the two-dimensional positioning area 20 usually adopts a rectangular coordinate system, so the angle between the second positioning dimension and the first positioning dimension is 90 degrees.

[0041] The second aspect of the present application also provides a composite area positioning system for the composite area positioning method, such as Figure 2As shown, it includes a solution center, multiple first real base stations 40 located in the one-dimensional positioning area 10, and multiple second real base stations 50 located in the two-dimensional positioning area 20. The first real base station 40 and the second real base station 50 can both be communicatively connected to the solution center; the first real base station 40 and the second real base station 50 can receive the positioning signal emitted by the tag and upload it to the solution center.

[0042] Among them, the solution center can be an electronic terminal, such as a PC, server, etc., which is connected to the first real base station 40 and the second real base station 50 through wired, wireless or other connection methods and has the ability to receive data and process and calculate it, and can calculate the location of the tag according to the above-mentioned composite area positioning method.

[0043] The first real base station 40 and the second real base station 50 can actually be base stations of the same model, and different models can be selected according to actual needs and site layout.

[0044] Specifically, the solution center can generate the corresponding virtual base station 41 according to the information uploaded by the first real base station 40 .

[0045] The solution center can process the data uploaded by the first real base station 40 using the composite area positioning method, and generate a virtual base station 41 to implement the positioning algorithm using the two-dimensional positioning area 20 for the entire composite area, eliminating the process of determining the location of the tag.

[0046] As a specific implementation, the solution center includes a receiving module and a calculation module for receiving information uploaded by the first real base station 40 and the second real base station 50; the calculation module is used to solve the location information of the tag according to the data received by the receiving module.

[0047] In addition, the solution center may also include a storage medium capable of storing data and a display device for displaying information.

[0048] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A composite area positioning method, characterized in that: For UWB positioning technology, the composite area positioning method includes: The composite area includes a one-dimensional positioning area and a two-dimensional positioning area, the one-dimensional positioning area has a one-dimensional coordinate system set based on a first positioning dimension, the one-dimensional positioning area includes a plurality of real base stations spaced apart along an extension direction of the first positioning dimension, and when a tag is located in the one-dimensional positioning area, at least two of the real base stations can receive a signal sent by the tag; The two-dimensional positioning area includes a positioning coordinate system composed of the first positioning dimension and a second positioning dimension, and the second positioning dimension and the first positioning dimension have an angle greater than 0 degrees and less than 180 degrees; The position coordinates of the real base station are shifted based on a position shift rule, wherein the position shift rule is to translate the position coordinates of the real base station along an extension direction of the second positioning dimension and generate the position coordinates of the virtual base station; Obtaining an information offset rule according to the position coordinates of the real base station and the virtual base station; After the real base station receives the signal of the tag, first positioning information is generated, and second positioning information of the virtual base station is generated according to the first positioning information and based on the information offset rule; When the real base station is a synchronous base station, the first positioning information includes a first synchronization time and a tag signal time; At this time, the second positioning information generated based on the first positioning information includes a second synchronization time and the tag signal time; The information offset rule includes a first offset rule corresponding to the synchronization base station, and the first offset rule is: the first synchronization time is equal to the second synchronization time; When the real base station is an asynchronous base station, the asynchronous base station can receive the synchronization signal sent by the synchronous base station. At this time, the first positioning information includes a third synchronization time and the tag signal time, and the third synchronization time is the time when the synchronization signal sent by the synchronous base station is received; and generating the second positioning information, wherein the second positioning information includes a fourth synchronization time and the tag signal time; The information offset rule further includes a second offset rule corresponding to the asynchronous base station, and the fourth synchronization time is obtained based on the second offset rule; Based on the first positioning information and the second positioning information, the position of the tag is calculated according to a positioning algorithm of the two-dimensional positioning area.

2. A composite area positioning method according to claim 1, characterized in that: According to the numbering information of the real base station and based on a numbering offset rule, the numbering information of the virtual base station corresponding to the real base station is generated.

3. A composite area positioning method according to claim 1, characterized in that: The second offset rule is: the fourth synchronization time is equal to T+(D2-D1) / c, wherein T is the third synchronization time, D1 is the distance between the real base station that sends the synchronization signal and the real base station of the non-synchronous base station type, D2 is the distance between the real base station that sends the synchronization signal and the virtual base station, and c is the speed of light.

4. A composite area positioning method according to claim 1, characterized in that: The real base station generates at least one virtual base station.

5. A composite area positioning method according to claim 1, characterized in that: The angle between the second positioning dimension and the first positioning dimension is 90 degrees.

6. A composite regional positioning system, characterized in that: The composite regional positioning method according to any one of claims 1 to 5, wherein the composite regional positioning system comprises a solution center, a plurality of first real base stations located in a one-dimensional positioning area, and a plurality of second real base stations located in a two-dimensional positioning area, wherein the first real base stations and the second real base stations are both capable of being connected to the solution center for communication; The first real base station and the second real base station can receive the positioning signal sent by the tag and upload it to the solution center.

7. A composite area positioning system according to claim 6, characterized in that: The solution center can generate a corresponding virtual base station according to the information uploaded by the first real base station.

8. A composite area positioning system according to claim 6, characterized in that: The solution center includes a receiving module and a calculation module for receiving information uploaded by the first real base station and the second real base station; The calculation module is used to calculate the location information of the tag according to the data received by the receiving module.

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