CN113596740A - Positioning system and positioning method - Google Patents
Positioning system and positioning method Download PDFInfo
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- CN113596740A CN113596740A CN202110657777.5A CN202110657777A CN113596740A CN 113596740 A CN113596740 A CN 113596740A CN 202110657777 A CN202110657777 A CN 202110657777A CN 113596740 A CN113596740 A CN 113596740A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The embodiment of the application provides a positioning system and a positioning method, wherein the system comprises: at least one positioning terminal, which is used for sending AOA positioning broadcast signals to an AOA positioning antenna; the system comprises at least one AOA positioning antenna, a processing server and an indoor distributed antenna system, wherein the AOA positioning antenna is used for receiving an AOA positioning broadcast signal of the positioning terminal, demodulating the received AOA positioning broadcast signal and resolving an angle to obtain positioning angle data, and sending the positioning angle data to the processing server through the indoor distributed antenna system; the processing server is used for processing the positioning angle data sent by the indoor distributed antenna system to obtain positioning coordinate data.
Description
Technical Field
Embodiments of the present application belong to the field of indoor positioning technologies, and in particular, relate to a positioning system and a positioning method.
Background
The bluetooth 5.1 standard provides an angle of arrival (arrival of arrival) positioning technology with sub-meter accuracy, in indoor high-accuracy positioning application, positioning base stations supporting AOA need to be densely distributed (generally, one positioning base station needs to be installed every 15 meters or so), in the prior art, the positioning base stations are technical concepts of independent AOA positioning systems, that is, pure AOA positioning base stations, each base station needs to connect a network switch through a network (the network switch supplies Power to the AOA base station through Power Over Ethernet), and in indoor scenarios (such as indoor environments in office buildings, business surpasses, underground parking lots, hospitals and the like), in order to cover signals of a mobile network of an operator, mobile network signals deployed by the operator cover an indoor distributed antenna system, the two systems exist independently and operate independently, so that the problem of two independent applications and repeated investment of the indoor distributed antenna system and the AOA positioning system exists.
Disclosure of Invention
The application provides a positioning system and a positioning method, and mainly aims to solve the problems of independent application and repeated investment of two applications of an indoor distributed antenna system and an AOA positioning system.
To achieve the above object, the present application provides a positioning system comprising:
at least one positioning terminal, which is used for sending AOA positioning broadcast signals to an AOA positioning antenna;
the system comprises at least one AOA positioning antenna, a processing server and a terminal, wherein the AOA positioning antenna is used for receiving an AOA positioning broadcast signal of the positioning terminal, processing the received AOA positioning broadcast signal and then sending the processed AOA positioning broadcast signal to the processing server through an indoor distributed antenna system;
and the processing server is used for processing the positioning data sent by the indoor distributed antenna system to obtain positioning coordinate data.
Preferably, the system further comprises an application terminal, wherein the application terminal is in communication with the processing server and is used for receiving the positioning coordinate data sent by the processing server.
Preferably, the AOA positioning antenna includes a data processor, and the data processor is configured to process an AOA positioning broadcast signal sent by the positioning terminal to obtain an AOA angle solution result, and send the AOA angle solution result to the indoor distributed antenna system through the indoor distributed antenna system.
Preferably, the data processor is a DSP chip.
Preferably, the positioning terminal, the indoor distributed antenna system and the AOA positioning antenna communicate with each other through Bluetooth.
To achieve the above object, the present application further provides a positioning method, which is implemented by the positioning system as above, and the positioning method includes the following steps:
sending an AOA positioning broadcast signal to an AOA positioning antenna through a positioning terminal;
receiving an AOA positioning broadcast signal of the positioning terminal through an AOA positioning antenna, processing the received AOA positioning broadcast signal, and sending the processed AOA positioning broadcast signal to a processing server through an indoor distributed antenna system;
and processing the positioning data sent by the indoor distributed antenna system through a processing server to obtain positioning coordinate data.
Preferably, the method further comprises the step of managing, by the application terminal, the received positioning coordinate data sent by the processing server.
Preferably, the data processor in the AOA positioning antenna processes the AOA positioning broadcast signal sent by the positioning terminal to obtain an AOA angle solution result, and sends the AOA angle solution result to the data processor through the indoor distributed antenna system.
Preferably, the data processor is a DSP chip.
Preferably, the positioning terminal, the indoor distributed antenna system and the AOA positioning antenna communicate with each other through Bluetooth.
Compared with the prior art, the AOA base station and the indoor branch antenna are designed into a unified indoor branch antenna supporting AOA in a fusion mode, the fusion of an AOA positioning system and an indoor distributed antenna system is achieved through the AOA positioning antenna, the problems of independent application and repeated investment of the indoor distributed antenna system and the AOA positioning system are solved, in addition, the positioning angle resolving process of the AOA positioning broadcast signals is transferred to local resolving formed inside the AOA positioning antenna through a processing server, the technology that the AOA positioning broadcast signals are transmitted to the processing server to be processed in the prior art is replaced, the data transmission quantity can be reduced, and the beneficial effect that the concurrency capability of the positioning system for processing the AOA positioning angles is improved is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions, and it will be understood by those skilled in the art that the drawings are not necessarily drawn to scale, in which:
FIG. 1 is a schematic structural diagram of a positioning system according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a positioning method according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the described embodiments are merely exemplary of some, and not all, of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given in the present application without any inventive step, shall fall within the scope of protection of the present application.
In the present application, CTE denotes a fixed frequency Extension signal (CTE), IQ denotes an in-phase and quadrature signal, I: in-phase denotes in-phase, Q: quadratures represent quadrature, 90 degrees out of phase with I.
As shown in fig. 1-2, fig. 1 is a schematic structural diagram of a positioning system of the present invention, the positioning system includes:
at least one positioning terminal 10 for sending AOA positioning broadcast signals to an AOA positioning antenna 20; the positioning terminals 10 periodically transmit AOA positioning broadcast signals in a preset frequency, respectively, wherein the AOA positioning broadcast signals include CTE data;
at least one AOA positioning antenna 20, configured to receive an AOA positioning broadcast signal of the positioning terminal 10, process the received AOA positioning broadcast signal, and send the processed AOA positioning broadcast signal to the data processor 211 through the indoor distributed antenna system; the AOA positioning antenna 20 includes a data processor 211, and the data processor 211 performs AOA positioning angle calculation according to IQ data obtained by demodulating the received AOA positioning broadcast signal, where the AOA positioning angle data includes a pitch angle and an azimuth angle.
At least one gateway 30, configured to receive positioning data sent by the AOA positioning antenna 20; the gateway 30 is connected with the AOA positioning antenna 20 through bluetooth, and angle data after resolving and processing by the AOA positioning antenna 20 is fed back to the gateway 30.
The processing server 40 is configured to process the positioning angle data sent by the indoor distributed antenna system to obtain positioning coordinate data; the processing server 40 is connected to the gateway 30 in the indoor distributed antenna system, and the gateway 30 is configured to receive the positioning angle data sent by the AOA positioning antenna 20; the gateway 30 is connected with the AOA positioning antenna 20 through bluetooth, and positioning angle data after resolving processing by the AOA positioning antenna 20 is fed back to the gateway 30; the processing server 40 integrates and analyzes the data sent by the gateway 30, performs result calculation processing, and forms positioning coordinate data.
The AOA positioning broadcast signal sent by the positioning terminal 10 includes CTE data required for demodulation of the AOA positioning antenna 20, the positioning terminal 10 periodically sends the AOA positioning broadcast signal at a preset frequency, the AOA positioning antenna 20 receives the AOA positioning broadcast signal sent by the positioning terminal 10, a data processor in the AOA positioning antenna performs positioning angle calculation on IQ data obtained by demodulation of the received AOA positioning broadcast signal, then positioning angle calculation results of all the AOA positioning antennas 20 are gathered and reported to the processing server 40 through the gateway 30 in the indoor distributed antenna system, the processing server 40 performs comprehensive analysis on positioning angle calculation of the plurality of AOA positioning antennas 20 to form final positioning coordinate data, the final positioning coordinate data is stored in a database, and data pushing is provided for the application terminal 50 (or APP).
The positioning terminal 10 is a positioning tag supporting AOA positioning and an asset tag for asset positioning management in the present embodiment. The positioning terminal 10 includes a bluetooth module supporting bluetooth 5.1, and periodically transmits an AOA positioning broadcast signal (e.g., 1 time per second, the signal including CTE data required for antenna demodulation) to a nearby AOA positioning antenna 20 according to a preset frequency.
In this embodiment, a data processor is disposed in the AOA positioning antenna 20, where the data processor is configured to process IQ data obtained by demodulating a receiving antenna according to a received AOA positioning broadcast signal, resolve a positioning angle from the IQ data, and obtain positioning of a transmitting end of the AOA positioning broadcast signal by resolving the AOA positioning angle, where the AOA positioning broadcast signal includes CTE data, and the data processor is introduced into the AOA positioning antenna.
The radio frequency output feeder of each gateway 30 in the indoor distributed antenna system is connected with a plurality of AOA positioning antennas 20, and the radio frequency output of the bluetooth chip in the gateway 30 is combined with the radio frequency output of the base station of the operator through a combiner (or coupler 22) and then transmitted to each indoor AOA positioning antenna 20 along the feeder. Each AOA positioning antenna 20 calculates link detection data packets, internet of things application data packets, and positioning angles added for AOA application, which are required by the positioning system, and transmits the calculated data to a bluetooth circuit of the gateway 30 in a bluetooth manner. The gateway 30 is also responsible for providing the coupling output of the direct current remote power supply to the feeder line, and the gateway 30 is connected with the cloud processing server 40 through a 2G/3G/4G/5G and a wired Ethernet mode.
The application terminal 50, the processing server 40 outputs the positioning coordinate data obtained by resolving the result to the application terminal 50, and the application terminal 50 pushes the positioning coordinate data, wherein the application terminal 50 is a positioning application WEB (or APP), and the content pushed by the application terminal 50 includes application functions of configuration management of the positioning terminal 10, management of a site map, map display of the positioning result, inquiry and tracking of a terminal position, electronic fence setting, alarm processing and the like, so that the positioning resolving structure can exert the maximum utilization rate.
In this embodiment, an AOA positioning broadcast signal is periodically sent at a preset frequency through the positioning terminal 10, the AOA positioning broadcast signal is received through the AOA positioning antenna, a data processor in the AOA positioning antenna performs positioning angle calculation on IQ data obtained by demodulating the antenna according to the received AOA positioning broadcast signal, a current position of the positioning terminal 10 is obtained according to a calculation result, then positioning angle calculation results of all the AOA positioning antennas 20 are gathered and reported to the positioning processing server 40 through the gateway 30 in the indoor distributed antenna system, the processing server 40 performs comprehensive analysis on the positioning angle calculation of the plurality of AOA positioning antennas 20 to form final positioning coordinate data, the final positioning coordinate data is stored in a database, and data push is provided for the application terminal 50 (or APP). The embodiment of the application realizes the combination of the AOA positioning technology and an indoor distributed antenna system, so that two coexisting independent application systems (the AOA positioning system and the indoor distributed system) are combined into a comprehensive product system, the cost performance of the product is greatly improved, the application range of the positioning system is enriched, and the application efficiency and the value of the positioning system are improved.
As shown in fig. 2, fig. 2 is a schematic flow chart of the positioning method of the present embodiment.
In this embodiment, the positioning method is implemented based on the first embodiment, and the positioning method includes the following steps:
step S10, sending the AOA positioning broadcast signal to the AOA positioning antenna through the positioning terminal;
in this embodiment, the positioning terminal is a positioning signboard and an asset positioning management asset tag supporting an AOA positioning system, the positioning terminal communicates between the gateway and the positioning antenna through bluetooth, and the positioning terminal includes a bluetooth chip supporting bluetooth 5.1, and periodically sends an AOA positioning broadcast signal (for example, 1 time per second, the signal includes CTE data generated by antenna demodulation) to a nearby AOA positioning antenna according to a preset frequency.
Step S20, receiving the AOA positioning broadcast signal of the positioning terminal through the AOA positioning antenna, processing the received AOA positioning broadcast signal and then sending the processed AOA positioning broadcast signal to a processing server through an indoor distributed antenna system;
in this embodiment, the AOA positioning antenna is responsible for receiving an AOA positioning broadcast signal, a data processor is disposed in the AOA positioning antenna, the data processor processes IQ data demodulated from the received AOA positioning broadcast signal, calculates a positioning angle therefrom, and obtains positioning of a positioning terminal through settlement of the AOA positioning angle, wherein the AOA positioning broadcast signal received by the AOA positioning antenna includes CTE data, the data processor is introduced into the AOA positioning antenna, specifically, the data processor is a DSP chip, the data processor directly performs AOA resolving operation on IQ data demodulated from the received AOA positioning broadcast signal in the AOA positioning antenna (outputs resolving results of a pitch angle and an azimuth angle are formed according to the IQ data), and obtains the AOA positioning angle in the AOA positioning broadcast signal according to the resolving operation result, wherein the AOA positioning angle includes the pitch angle and the azimuth angle, and sending the resolving result to the processing server through the indoor distributed antenna system.
In this embodiment, a radio frequency output feeder of each gateway in the indoor distributed antenna system is connected to a plurality of AOA positioning antennas, and radio frequency outputs of bluetooth chips in the gateways are combined with radio frequency outputs of base stations of operators by a combiner (or a coupler) and then transmitted to the AOA positioning antennas indoors along the feeders. Each AOA positioning antenna sends a link detection data packet and an Internet of things application data packet required by a positioning system and a positioning angle resolving result added for AOA application to a Bluetooth circuit of the gateway in a Bluetooth mode, the gateway is also responsible for providing coupling output of a direct-current remote power supply for a feeder line, and the gateway is connected with a processing server in a wired Ethernet mode through 2G/3G/4G/5G.
And step S30, processing the positioning data sent by the indoor distributed antenna system through the processing server to obtain the number of positioning coordinates.
In this embodiment, the AOA solution results of all AOA positioning antennas are gathered and reported to the processing server through the gateway, and a solution process of the comprehensive positioning results of all AOA positioning antennas is performed to form final positioning coordinate data, which is stored in the database and can provide data push for the positioning application WEB (or APP). After the AOA positioning angle data is integrated and analyzed, the processing server outputs the positioning coordinate data to the application terminal, the application terminal pushes the positioning coordinate data, the application terminal manages the received positioning coordinate data sent by the processing server, the application terminal is a positioning application WEB terminal (or APP), and the content pushed by the application terminal comprises application functions of configuration management of the positioning terminal, management of a site map, map display of a positioning result, inquiry and tracking of a terminal position, electronic fence setting, alarm processing and the like, so that the positioning resolving structure can exert the maximum utilization rate.
In the embodiment, the positioning terminal periodically sends the AOA positioning broadcast signal at a preset frequency; receiving the AOA positioning broadcast signal by an AOA positioning antenna; a data processor in the AOA positioning antenna carries out positioning angle solution on IQ data obtained by demodulating the AOA positioning antenna according to a received AOA positioning broadcast signal; acquiring an AOA positioning angle of the positioning terminal according to a calculation result, wherein the AOA positioning angle comprises a pitch angle and an azimuth angle; the AOA positioning angle data after the AOA positioning antenna is resolved is fed back to the gateway; the processing server integrates and analyzes the gateway to converge and resolve data to form positioning coordinate data, and the application enables two independent application systems (an AOA positioning system and an indoor distributed antenna system) which exist together to be combined into a comprehensive product system, so that the cost performance of the product is greatly improved, the application range of the positioning system is enriched, and the application efficiency and the value of the positioning system are improved.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A positioning system, comprising,
at least one positioning terminal, which is used for sending AOA positioning broadcast signals to an AOA positioning antenna;
the system comprises at least one AOA positioning antenna, a processing server and a terminal, wherein the AOA positioning antenna is used for receiving an AOA positioning broadcast signal of the positioning terminal, processing the received AOA positioning broadcast signal and then sending the processed AOA positioning broadcast signal to the processing server through an indoor distributed antenna system;
and the processing server is used for processing the data sent by the indoor distributed antenna system to obtain positioning coordinate data.
2. A positioning system as set forth in claim 1, further comprising an application terminal in communication with the processing server for receiving the positioning coordinate data transmitted by the processing server.
3. The positioning system according to claim 1, wherein the AOA positioning antenna comprises a data processor, and the data processor is configured to process an AOA positioning broadcast signal sent by the positioning terminal to obtain an AOA angle solution, and send the AOA angle solution to the processing server through the indoor distributed antenna system.
4. A positioning system as set forth in claim 3, wherein said data processor is a DSP chip.
5. A positioning system according to claims 1 to 3, characterized in that the positioning terminals, the indoor distributed antenna system and the AOA positioning antenna communicate with each other via bluetooth.
6. A positioning method, characterized in that the positioning method is realized by the positioning system according to any one of claims 1 to 5, comprising,
sending an AOA positioning broadcast signal to an AOA positioning antenna through a positioning terminal;
receiving an AOA positioning broadcast signal of the positioning terminal through an AOA positioning antenna, processing the received AOA positioning broadcast signal, and sending the processed AOA positioning broadcast signal to a processing server through an indoor distributed antenna system;
and processing the data sent by the indoor distributed antenna system through a processing server to obtain positioning coordinate data.
7. A positioning method as set forth in claim 6, further comprising,
and managing the positioning coordinate data sent by the processing server through the application terminal.
8. A method of locating according to claim 6, comprising,
and processing the AOA positioning broadcast signal sent by the positioning terminal through a data processor in the AOA positioning antenna to obtain an AOA angle calculation result, and sending the AOA angle calculation result to the processing server through an indoor distributed antenna system.
9. A positioning method according to claim 6, characterized in that said data processor is a DSP chip.
10. A positioning method according to any of claims 6 to 9,
and the positioning terminal, the indoor distributed antenna system and the AOA positioning antenna are communicated through Bluetooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657777.5A CN113596740A (en) | 2021-06-14 | 2021-06-14 | Positioning system and positioning method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110657777.5A CN113596740A (en) | 2021-06-14 | 2021-06-14 | Positioning system and positioning method |
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| CN113596740A true CN113596740A (en) | 2021-11-02 |
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| CN202110657777.5A Pending CN113596740A (en) | 2021-06-14 | 2021-06-14 | Positioning system and positioning method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020055896A1 (en) * | 2018-09-11 | 2020-03-19 | Greina Technologies, Inc. | Angle of arrival and departure using standard bluetooth low energy packets |
| CN111294745A (en) * | 2020-01-22 | 2020-06-16 | 清研讯科（北京）科技有限公司 | Indoor distribution system capable of being used for positioning |
| CN112637777A (en) * | 2020-12-22 | 2021-04-09 | 上海智向信息科技有限公司 | Bluetooth positioning system |
| CN213026522U (en) * | 2020-07-09 | 2021-04-20 | 中国移动通信有限公司研究院 | Antenna system |
-
2021
- 2021-06-14 CN CN202110657777.5A patent/CN113596740A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020055896A1 (en) * | 2018-09-11 | 2020-03-19 | Greina Technologies, Inc. | Angle of arrival and departure using standard bluetooth low energy packets |
| CN111294745A (en) * | 2020-01-22 | 2020-06-16 | 清研讯科（北京）科技有限公司 | Indoor distribution system capable of being used for positioning |
| CN213026522U (en) * | 2020-07-09 | 2021-04-20 | 中国移动通信有限公司研究院 | Antenna system |
| CN112637777A (en) * | 2020-12-22 | 2021-04-09 | 上海智向信息科技有限公司 | Bluetooth positioning system |
Non-Patent Citations (1)
| Title |
|---|
| 中兴通讯股份有限公司 等: "《5G 室内融合定位白皮书》", 31 October 2020 * |
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Application publication date: 20211102 |