CN110221243B - Positioning method and system of communication network - Google Patents
Positioning method and system of communication network Download PDFInfo
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- CN110221243B CN110221243B CN201810176047.1A CN201810176047A CN110221243B CN 110221243 B CN110221243 B CN 110221243B CN 201810176047 A CN201810176047 A CN 201810176047A CN 110221243 B CN110221243 B CN 110221243B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/0009—Transmission of position information to remote stations
- G01S5/0045—Transmission from base station to mobile station
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/08—Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location
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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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- 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
- H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The embodiment of the application provides a positioning method and a positioning system of a communication network, wherein the method comprises the following steps: the server determines one or more first base stations; the first base station sends a ranging request wireless frame to a second high-frequency ranging module of the terminal through a first high-frequency ranging module of the first base station; the terminal sends a ranging response wireless frame aiming at the ranging request wireless frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal; the first base station calculates the distance information between the first base station and the terminal by adopting the ranging response wireless frame through a first high-frequency ranging module of the first base station, and sends the distance information to a server; and the server calculates the position of the terminal by adopting the distance information between each first base station and the terminal. According to the method for positioning through the high-frequency ranging module, the positioning accuracy can be improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and a system for positioning a communication network.
Background
The internet of things technology is the third information technology revolution after computers and the internet, has the advantages of real-time performance, interactivity and the like, and is widely applied to multiple fields of city management, digital families, positioning navigation, logistics management, security systems and the like. The LoRa is an ultra-long distance transmission scheme based on a spread spectrum technology in the Internet of things, and has the characteristics of long transmission distance, low power consumption, multiple nodes, low cost and the like.
Positioning is an important application of the LoRa network. However, the positioning solution on the market is expensive and has low positioning accuracy (over 70 meters). This results in that the LoRa network location function is not put into practical use late.
Disclosure of Invention
In view of the above, embodiments of the present application are proposed to provide a positioning method of a communication network and a corresponding positioning system of a communication network that overcome or at least partially solve the above problems.
In order to solve the above problem, an embodiment of the present application discloses a method for positioning a communication network, where the communication network includes: the method comprises the following steps that a server, a base station with a first high-frequency ranging module and a terminal with a second high-frequency ranging module are arranged, and the method comprises the following steps:
the server determining one or more first base stations;
the first base station sends a ranging request wireless frame to a second high-frequency ranging module of the terminal through a first high-frequency ranging module of the first base station;
the terminal sends a ranging response wireless frame aiming at the ranging request wireless frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal;
the first base station calculates the distance information between the first base station and the terminal by adopting the ranging response wireless frame through a first high-frequency ranging module of the first base station, and sends the distance information to a server;
and the server calculates the position of the terminal by adopting the distance information between each first base station and the terminal.
Preferentially, the ranging request radio frame comprises second identification information for the ranging request radio frame;
the step that the terminal sends a ranging response radio frame aiming at the ranging request radio frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal comprises the following steps:
the terminal compares first identification information which is obtained in advance and aims at the ranging request radio frame with second identification information which is obtained in advance and aims at the ranging request radio frame;
and if the two radio frames are the same, the terminal sends a ranging response radio frame aiming at the ranging request radio frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal.
Preferably, the method further comprises the following steps:
the server determines a second base station and sends a positioning command request message to the second base station; the positioning command request message includes first identification information for a ranging request radio frame;
and the second base station sends a positioning request radio frame to the terminal according to the positioning command request message, wherein the positioning request radio frame comprises the first identification information aiming at the ranging request radio frame.
Preferably, the first base station is a base station that sends a positioning command response message to the server, and the method further includes:
after receiving the positioning request wireless frame, the terminal broadcasts a positioning response wireless frame;
and one or more base stations receiving the positioning response wireless frame send a positioning command response message to the server according to the positioning response wireless frame.
Preferably, the method further comprises the following steps:
the server sends a ranging command request message to the first base station; the ranging command request message includes second identification information for a ranging request radio frame;
and the first base station generates a ranging request radio frame by adopting the second identification information aiming at the ranging request radio frame.
Preferably, the step of broadcasting a location response radio frame by the terminal after receiving the location request radio frame includes:
after receiving the positioning request radio frame, the terminal broadcasts a positioning response radio frame through a second high-frequency ranging module of the terminal;
the method further comprises the following steps:
and one or more base stations receive the positioning response wireless frames through a first high-frequency ranging module of the base stations.
Preferably, the base station further includes a first low frequency communication module, and the terminal further includes a second low frequency communication module;
the step that the second base station sends the positioning request wireless frame to the terminal comprises the following steps:
and the second base station sends a positioning request wireless frame to a second low-frequency communication module of the terminal through a first low-frequency communication module of the second base station.
Preferably, the step of broadcasting a location response radio frame by the terminal after receiving the location request radio frame includes:
after receiving the positioning request wireless frame, the terminal broadcasts a positioning response wireless frame through a second low-frequency communication module of the terminal;
the method further comprises the following steps:
and one or more base stations receive the positioning response wireless frame through a first low-frequency communication module of the one or more base stations.
Preferably, the step of calculating the distance information between the first base station and the terminal by the first base station through the first high-frequency ranging module includes:
the first base station determines the sending time of a ranging request radio frame and the receiving time of the ranging response radio frame through a first high-frequency ranging module of the first base station;
and the first base station calculates the distance information between the first base station and the terminal by adopting the sending time and the receiving time through a first high-frequency ranging module of the first base station.
The application also discloses a positioning system of a communication network, comprising: the system comprises a server, a base station with a first high-frequency ranging module and a terminal with a second high-frequency ranging module, wherein the server comprises:
the server is used for determining one or more first base stations from the base stations;
the first base station is used for sending a ranging request wireless frame to a second high-frequency ranging module of the terminal through a first high-frequency ranging module of the first base station;
the terminal is used for sending a ranging response radio frame aiming at the ranging request radio frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal;
the first base station is further used for calculating distance information between the first base station and the terminal by adopting the ranging response wireless frame through a first high-frequency ranging module of the first base station, and sending the distance information to a server;
the server is further configured to calculate the location of the terminal by using the distance information between each first base station and the terminal.
Preferentially, the ranging request radio frame comprises second identification information for the ranging request radio frame;
the terminal is further configured to compare first identification information, which is obtained in advance, for the ranging request radio frame with second identification information, which is obtained in advance, for the ranging request radio frame; and if the two radio frames are the same, the second high-frequency ranging module sends a ranging response radio frame aiming at the ranging request radio frame to the first high-frequency ranging module of the first base station.
Preferably, the server is further configured to determine a second base station from the base stations, and send a positioning command request message to the second base station; the positioning command request message comprises first identification information for a ranging request radio frame;
the second base station is configured to send a location request radio frame to the terminal according to the location command request message, where the location request radio frame includes the first identification information for the ranging request radio frame.
Preferably, the terminal is further configured to broadcast a positioning response radio frame after receiving the positioning request radio frame;
one or more base stations which receive the positioning response wireless frame are used for sending positioning command response messages to the server according to the positioning response wireless frame;
the server is further configured to determine the base station that sends the positioning command response message as the first base station.
Preferably, the server is further configured to send a ranging command request message to the first base station; the ranging command request message includes second identification information for a ranging request radio frame;
the first base station is further configured to generate a ranging request radio frame by using the second identification information for the ranging request radio frame.
Preferably, the terminal is further configured to broadcast a positioning response radio frame through a second high-frequency ranging module of the terminal after receiving the positioning request radio frame;
and the base station is also used for receiving the positioning response wireless frame through a first high-frequency ranging module of the base station.
Preferably, the base station further includes a first low frequency communication module, and the terminal further includes a second low frequency communication module;
the second base station is further configured to send a location request wireless frame to a second low-frequency communication module of the terminal through a first low-frequency communication module of the second base station.
Preferably, the terminal is further configured to broadcast a positioning response radio frame through a second low-frequency communication module of the terminal after receiving the positioning request radio frame;
the base station is further used for receiving the positioning response wireless frame through a first low-frequency communication module of the base station.
Preferentially, the first base station is further configured to determine, by a first high-frequency ranging module of the first base station, a sending time of a radio frame for sending a ranging request, and a receiving time of receiving the ranging response radio frame; and calculating the distance information between the first base station and the terminal by adopting the sending time and the receiving time through a first high-frequency ranging module of the first base station.
The application also discloses a device, includes:
one or more processors; and
one or more machine readable media having instructions stored thereon that, when executed by the one or more processors, cause the apparatus to perform one or more methods as described above.
The present application also discloses one or more machine-readable media having instructions stored thereon, which when executed by one or more processors, cause an apparatus to perform one or more methods as described above.
The embodiment of the application has the following advantages:
in this embodiment, each first base station sends a ranging request radio frame to the second high-frequency ranging module of the terminal through its own first high-frequency ranging module, and the terminal returns a ranging response radio frame to the first high-frequency ranging module of each first base station through the second high-frequency ranging module. And each first base station calculates the distance information between the first base station and the terminal according to the ranging response wireless frame through a first high-frequency ranging module of the first base station, and the server determines the position of the terminal according to the distance information between each first base station and the terminal. Compared with the existing method for positioning through the low-frequency LoRa module, the method for positioning through the high-frequency ranging module in the embodiment of the application can improve the positioning accuracy.
Compared with the GPS positioning technology, the GPS positioning cannot support the indoor positioning, and the GPS positioning requires a longer time to search for GPS satellites. The embodiment of the application has the characteristics of high real-time performance, indoor positioning support and the like.
Drawings
Fig. 1 is a flowchart of the steps of embodiment 1 of a positioning method of a communication network according to the present application;
fig. 2 is a flowchart of the steps of embodiment 2 of a positioning method of a communication network according to the present application;
fig. 3 is a flowchart of the steps of embodiment 3 of a positioning method of a communication network according to the present application;
fig. 4 is a flowchart of a positioning method of an LoRa network in an embodiment of the present application;
fig. 5 is a block diagram of an embodiment of a positioning system of a communication network according to the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
The LoRa network consists of terminal nodes, base station nodes and a server. The terminal has an LoRa network connection capability and accesses the LoRa network. According to different application scenarios deployed by the LoRa network, the terminal may include different electronic devices, for example, when the LoRa network is applied in city management, the terminal may include a smart meter; when the LoRa network is applied to a digital home, the terminal may include various smart appliances and the like.
The base station, also called gateway or concentrator in the LoRa network, has a wireless connection convergence function, and includes that the terminal provides an entrance for accessing the LoRa network, and forwards data from the server or the terminal, so as to realize data interaction between the terminal and the server. Of course, the base station can also perform data interaction with other base stations within the signal coverage of the base station by transmitting radio frames.
The server may include a server or a server cluster, and is configured to perform service processing according to data acquired from a base station or a terminal, and control an operating mode and an operating state of the base station or the terminal.
The important reason for the low positioning accuracy of the current LoRa network is that a low-frequency low-bandwidth wireless frequency band is used. One of the core ideas of the embodiments of the present application is that, in the LoRa positioning scheme, the existing low-frequency narrowband LoRa module (whose operating frequency includes but is not limited to 470M-510MHz frequency band) is no longer used for distance measurement, but a high-frequency LoRa module (whose operating frequency includes but is not limited to 2.4GHz frequency band) is used for distance measurement. Although the low-frequency narrow-band LoRa module has the characteristics of low power consumption, long transmission distance and high sensitivity, the ranging precision is low. And the high frequency LoRa module the consumption higher, transmission distance shorter, sensitivity is higher, and the range finding precision is higher. In addition, the maximum transmitting power of the 470M-510MHz frequency band is 17dbm, while the maximum transmitting power of the 2.4G frequency band can reach more than 20dbm, and the transmission power is higher.
Referring to fig. 1, a flowchart illustrating steps of embodiment 1 of a positioning method for a communication network according to the present application is shown, where the communication network includes: the method comprises the following steps:
in the embodiment of the present application, the communication network may be an LoRa network. The server selects one or more first base stations from the base stations of the entire network. Specifically, the first base stations are base stations capable of communicating with the terminals, and the terminals are within the coverage area of each first base station.
In some specific areas (e.g., a campus), the locations of the base stations and the terminals are fixed, and the server can directly determine which base stations the terminals are within the coverage area of.
In addition, the LoRa network has its own mechanisms and protocols to enable the server to know which base stations the terminal is in coverage.
102, the first base station sends a ranging request wireless frame to a second high-frequency ranging module of the terminal through a first high-frequency ranging module of the first base station;
the server may notify each first base station to transmit a ranging request radio frame.
And each first base station sends a ranging request wireless frame to a second high-frequency ranging module of the terminal sequentially through the first high-frequency ranging module according to a certain time sequence.
The operating frequency of the high frequency ranging module includes, but is not limited to, the 2.4GHz band.
103, the terminal sends a ranging response radio frame aiming at the ranging request radio frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal;
after receiving the ranging request radio frame, the terminal sequentially sends ranging response radio frames aiming at the ranging request radio frame to the first high-frequency ranging modules of the first base stations through the second high-frequency ranging modules of the terminal.
104, the first base station calculates distance information between the first base station and the terminal by adopting the ranging response wireless frame through a first high-frequency ranging module of the first base station, and sends the distance information to a server;
after receiving the ranging response radio frame, the first base station calculates the distance between the first base station and the terminal through a first high-frequency ranging module of the first base station.
And an algorithm for calculating distance information is built in the high-frequency ranging module. Specifically, the high-frequency ranging module can calculate the flight time of electric waves ranging from 2 points according to the sending time t1 of the ranging request radio frame and the receiving time t2 of the ranging response radio frame, the duration of the ranging request radio frame and the ranging response radio frame, and the fixed processing time of the chip, so as to calculate the distance.
And each first base station sends the calculated distance information to a server.
And 105, the server calculates the position of the terminal by adopting the distance information between each first base station and the terminal.
Specifically, the server knows the location of each first base station in advance. And the server calculates the position of the terminal by adopting a positioning algorithm (such as a triangulation method) according to the distance information between each first base station and the terminal.
In this embodiment, each first base station sends a ranging request radio frame to the second high-frequency ranging module of the terminal through its own first high-frequency ranging module, and the terminal returns a ranging response radio frame to the first high-frequency ranging module of each first base station through the second high-frequency ranging module. And each first base station calculates the distance information between the first base station and the terminal according to the response wireless frame through a first high-frequency ranging module of the first base station, and the server determines the position of the terminal according to the distance information between each first base station and the terminal. Compared with the existing method for positioning through the low-frequency LoRa module, the method for positioning through the high-frequency ranging module in the embodiment of the application can improve the positioning accuracy.
Compared with the GPS positioning technology, the GPS positioning cannot support the indoor positioning, and the GPS positioning requires a longer time to search for GPS satellites. The embodiment of the application has the characteristics of high real-time performance, indoor positioning support and the like.
Referring to fig. 2, a flowchart illustrating steps of embodiment 2 of a positioning method of a communication network according to the present application is shown, where the communication network includes: the method comprises the following steps:
the server selects a base station capable of communicating with the terminal from the base stations of the whole network as the second base station, for example, the base station with the best communication signal with the terminal is selected as the second base station.
And the server sends a positioning command request message to the second base station so as to start a positioning process.
after receiving the positioning command request message, the second base station extracts first identification information aiming at the ranging request radio frame in the positioning command request message; then, the second base station generates a positioning request wireless frame and adds the first identification information into the positioning request wireless frame; and finally, the second base station sends the positioning request wireless frame to the terminal so as to inform the terminal of the impending positioning.
After receiving the location request radio frame, the terminal may analyze the location request radio frame to obtain the first identification information. Furthermore, the transmission power, frequency parameter, bandwidth parameter, modulation parameter, etc. of the ranging request radio frame in the subsequent process can be obtained by analyzing the positioning request radio frame.
In this embodiment, the base station may further include a first low frequency communication module, and the terminal may further include a second low frequency communication module;
the step 202 may include: and the second base station sends a positioning request wireless frame to a second low-frequency communication module of the terminal through a first low-frequency communication module of the second base station.
In the embodiment of the present application, the operating frequencies of the first low frequency communication module and the second low frequency communication module include, but are not limited to, the 470M-510MHz frequency band.
The second base station may not have the first high frequency ranging module, and the second base station may send the location request wireless frame to the second low frequency communication module of the terminal only through the first low frequency communication module of the second base station.
the server selects one or more first base stations from the network-wide base stations. Specifically, the first base stations are base stations capable of communicating with the terminals, and the terminals are within the coverage area of each first base station.
The server may sequentially transmit the ranging command request message to each of the first base stations according to a certain timing.
And step 204, the first base station generates a ranging request radio frame by using the second identification information for the ranging request radio frame.
After receiving the ranging command request message, the first base station extracts second identification information aiming at the ranging request radio frame in the ranging command request message; then, the first base station generates a ranging request radio frame and adds the second identification information to the ranging request radio frame.
In general, the second identification information received by each first base station is the same.
each first base station may send a ranging request radio frame to the second high-frequency ranging module of the terminal in sequence through its own first high-frequency ranging module according to a certain time sequence.
the terminal compares whether the first identification information obtained from the positioning command request message sent by the second base station is the same as the second identification information obtained from the wireless frame of the ranging request sent by the first base station.
the first identification and the second identification are used for uniquely identifying two parties communicating through the high-frequency ranging module. If the first identification and the second identification are the same, the communication is proved to be allowed by the server. And the terminal returns a ranging response wireless frame to the first high-frequency ranging module of the corresponding first base station through the second high-frequency ranging module.
If the first identification is different from the second identification, the terminal can perform frame loss processing and does not return to the ranging response radio frame. In the embodiment of the application, whether the base station and the terminal are allowed to perform ranging is judged through the identification, so that the base stations allowed to perform ranging are all base stations predetermined by the server.
in the embodiment of the present application, the step 208 may include the following sub-steps:
in the substep S11, the first base station determines, through a first high-frequency ranging module of the first base station, a sending time of a ranging request radio frame and a receiving time of the ranging response radio frame;
and a substep S12, calculating, by the first base station, distance information between the first base station itself and the terminal by using the sending time and the receiving time through a first high-frequency ranging module of the first base station itself.
And an algorithm for calculating distance information is built in the high-frequency ranging module. Specifically, the high-frequency ranging module can calculate the flight time of electric waves ranging from 2 points according to the sending time t1 of the ranging request radio frame and the receiving time t2 of the ranging response radio frame, the duration of the ranging request radio frame and the ranging response radio frame, and the fixed processing time of the chip, so as to calculate the distance.
Specifically, the server knows the location of each first base station in advance. And the server calculates the position of the terminal by adopting a positioning algorithm (such as a triangulation method) according to the distance information between each first base station and the terminal.
In this embodiment, each first base station sends a ranging request radio frame to the second high-frequency ranging module of the terminal through its own first high-frequency ranging module, and the terminal returns a ranging response radio frame to the first high-frequency ranging module of each first base station through the second high-frequency ranging module. And each first base station calculates the distance information between the first base station and the terminal according to the ranging response wireless frame through a first high-frequency ranging module of the first base station, and the server determines the position of the terminal according to the distance information between each first base station and the terminal. Compared with the existing method for positioning through the low-frequency LoRa module, the method for positioning through the high-frequency ranging module in the embodiment of the application can improve the positioning accuracy.
Compared with the GPS positioning technology, the GPS positioning cannot support the indoor positioning, and the GPS positioning requires a longer time to search for GPS satellites. The embodiment of the application has the characteristics of high real-time performance, indoor positioning support and the like.
Referring to fig. 3, a flowchart illustrating the steps of embodiment 3 of the positioning method for a communication network according to the present application is shown, where the communication network includes: the method comprises the following steps:
step 301, the server determines a second base station and sends a positioning command request message to the second base station; the positioning command request message includes first identification information for a ranging request radio frame;
the server selects a base station capable of communicating with the terminal from the network-wide base stations as the second base station, for example, the base station with the best communication signal with the terminal is selected as the second base station.
And the server sends a positioning command request message to the second base station to start a positioning process.
in this embodiment, the base station may further include a first low frequency communication module, and the terminal may further include a second low frequency communication module;
the step 302 may include: and the second base station sends a positioning request wireless frame to a second low-frequency communication module of the terminal through a first low-frequency communication module of the second base station.
In the embodiment of the present application, the operating frequencies of the first low frequency communication module and the second low frequency communication module include, but are not limited to, the 470M-510MHz frequency band.
in some cases, the server cannot know which base stations in the entire network the terminal is in coverage. At this time, the location response radio frame may be broadcast by the terminal.
In an example of the embodiment of the present application, the step 303 may be: after receiving the positioning request radio frame, the terminal broadcasts a positioning response radio frame through a second high-frequency ranging module of the terminal;
the method may further comprise:
and one or more base stations receive the positioning response wireless frame through a first high-frequency ranging module of the one or more base stations.
In this example, the terminal broadcasts a location response radio frame through its second high frequency ranging module. One or more base stations can receive the positioning response wireless frame through a first high-frequency ranging module of the one or more base stations.
In another example of the embodiment of the present application, the step 303 may be: after receiving the positioning request wireless frame, the terminal broadcasts a positioning response wireless frame through a second low-frequency communication module of the terminal;
the method may further comprise:
and one or more base stations receive the positioning response wireless frame through a first low-frequency communication module of the one or more base stations.
In this example, the terminal broadcasts a location response radio frame through its second low frequency communication module. One or more base stations can receive the positioning response wireless frame through the first low-frequency communication module of the one or more base stations.
and the base station receiving the positioning response wireless frame generates a positioning command response message and sends the positioning command response message to the server.
If the base station can receive the positioning response wireless frame, the terminal is in the coverage area of the base station.
in the embodiment of the present application, the server may determine the first base station from the network-wide base stations through the contents of step 303 to step 305.
the server may sequentially transmit the ranging command request message to each of the first base stations according to a certain timing.
After receiving the ranging command request message, the first base station extracts second identification information aiming at a ranging request radio frame in the ranging command request message; then, the first base station generates a ranging request radio frame and adds the second identification information to the ranging request radio frame.
308, the first base station sends a ranging request radio frame to a second high-frequency ranging module of the terminal through a first high-frequency ranging module of the first base station;
each first base station may send a ranging request radio frame to the second high-frequency ranging module of the terminal in sequence through its own first high-frequency ranging module according to a certain time sequence.
309, the terminal comparing the pre-acquired first identification information for the ranging request radio frame with the second identification information for the ranging request radio frame;
the terminal compares whether the first identification information obtained from the positioning command request message sent by the second base station is the same as the second identification information obtained from the wireless frame of the ranging request sent by the first base station.
if the first identification and the second identification are the same, the communication is proved to be allowed by the server. And the terminal returns a ranging response wireless frame to the first high-frequency ranging module of the corresponding first base station through the second high-frequency ranging module.
If the first identification is different from the second identification, the terminal can perform frame loss processing and does not return to the ranging response radio frame.
Step 311, the first base station calculates distance information between the first base station and the terminal by using the ranging response radio frame through a first high-frequency ranging module of the first base station, and sends the distance information to a server;
in the embodiment of the present application, the step 311 may include the following sub-steps:
in the substep S11, the first base station determines, through a first high-frequency ranging module of the first base station, a sending time of a ranging request radio frame and a receiving time of the ranging response radio frame;
and a substep S12, calculating, by the first base station, distance information between the first base station itself and the terminal by using the sending time and the receiving time through a first high-frequency ranging module of the first base station itself.
In step 312, the server calculates the location of the terminal by using the distance information between each first base station and the terminal.
Specifically, the server knows the location of each first base station in advance. And the server calculates the position of the terminal by adopting a positioning algorithm (such as a triangulation method) according to the distance information between each first base station and the terminal.
In this embodiment, each first base station sends a ranging request radio frame to the second high-frequency ranging module of the terminal through its own first high-frequency ranging module, and the terminal returns a ranging response radio frame to the first high-frequency ranging module of each first base station through the second high-frequency ranging module. And each first base station calculates the distance information between the first base station and the terminal according to the ranging response wireless frame through a first high-frequency ranging module of the first base station, and the server determines the position of the terminal according to the distance information between each first base station and the terminal. Compared with the existing method for positioning through the low-frequency LoRa module, the method for positioning through the high-frequency ranging module in the embodiment of the application can improve the positioning accuracy.
Compared with the GPS positioning technology, the GPS positioning cannot support the indoor positioning, and the GPS positioning requires a longer time to search for GPS satellites. The embodiment of the application has the characteristics of high real-time performance, indoor positioning support and the like.
In order to enable those skilled in the art to better understand the embodiments of the present application, the following description is given by way of an example:
fig. 4 is a flowchart illustrating a positioning method of an LoRa network according to an embodiment of the present application. The LoRa network includes: server, base station 1, base station 2, base station 3, base station 4, and terminal.
The base station 2 comprises a low-frequency communication module and a high-frequency ranging module
The positioning process comprises the following steps:
1. the server sends a positioning command request message to the base station 2; the positioning command request message includes first identification information for a ranging request radio frame;
2. the base station 2 sends a positioning request wireless frame to a low-frequency communication module of the terminal through a low-frequency communication module of the base station, wherein the positioning request wireless frame comprises first identification information aiming at a ranging request wireless frame;
3. the terminal analyzes a positioning request wireless frame received by the low-frequency communication module to acquire first identification information and sends a positioning command to the high-frequency ranging module;
4. the terminal broadcasts a positioning response wireless frame through a high-frequency ranging module;
5. the high-frequency ranging modules of the base stations 1, 2, 3 and 4 receive the positioning response wireless frames at the same time, and the base stations with longer distances cannot receive the positioning response wireless frames;
6. the base station 1, the base station 2, the base station 3 and the base station 4 send positioning command response messages to a server;
7. the server sends a ranging command request message to the base station 1, wherein the ranging command request message comprises second identification information aiming at a ranging request radio frame;
8. the base station 1 sends a ranging request wireless frame to a high-frequency ranging module of the terminal through a high-frequency ranging module of the base station, wherein the ranging request wireless frame comprises second identification information;
9. the terminal receives a ranging request wireless frame sent by the base station 1 through the high-frequency ranging module of the terminal; the terminal compares whether the first identification information and the second identification information are the same or not, and if so, the terminal sends a ranging response wireless frame to a high-frequency ranging module of the base station 1 through a high-frequency ranging module of the terminal;
10. a high-frequency ranging module of the base station 1 receives the ranging response wireless frame, calculates the distance between the base station 1 and the terminal by adopting the ranging response wireless frame, and then sends the distance between the base station 1 and the terminal to a server;
11. the server transmits a ranging command request message to the base station 2, the ranging command request message including second identification information for a ranging request radio frame;
12. the base station 2 sends a ranging request wireless frame to a high-frequency ranging module of the terminal through a high-frequency ranging module of the base station, wherein the ranging request wireless frame comprises second identification information;
13. the terminal receives a ranging request wireless frame sent by the base station 2 through the high-frequency ranging module of the terminal; the terminal compares whether the first identification information and the second identification information are the same, and if so, the terminal sends a ranging response wireless frame to a high-frequency ranging module of the base station 2 through the high-frequency ranging module of the terminal;
14. the high-frequency ranging module of the base station 2 receives the ranging response wireless frame, calculates the distance between the base station 2 and the terminal by adopting the ranging response wireless frame, and then sends the distance between the base station 2 and the terminal to the server;
15. the server transmits a ranging command request message to the base station 3, the ranging command request message including second identification information for a ranging request radio frame;
16. the base station 3 sends a ranging request wireless frame to a high-frequency ranging module of the terminal through a high-frequency ranging module of the base station, wherein the ranging request wireless frame comprises second identification information;
17. the terminal receives a ranging request wireless frame sent by the base station 3 through a high-frequency ranging module through the high-frequency ranging module of the terminal; the terminal compares whether the first identification information and the second identification information are the same, and if the first identification information and the second identification information are the same, the terminal sends a ranging response wireless frame to a high-frequency ranging module of the base station 3 through the high-frequency ranging module of the terminal;
18. a high-frequency ranging module of the base station 3 receives the ranging response wireless frame, calculates the distance between the base station 3 and the terminal by adopting the ranging response wireless frame, and then sends the distance between the base station 3 and the terminal to a server;
19. the server transmits a ranging command request message to the base station 4, wherein the ranging command request message comprises second identification information aiming at a ranging request radio frame;
20. the base station 4 sends a ranging request wireless frame to a high-frequency ranging module of the terminal through a high-frequency ranging module of the base station, wherein the ranging request wireless frame comprises second identification information;
21. the terminal receives a ranging request wireless frame sent by the base station 4 through the high-frequency ranging module of the terminal; the terminal compares whether the first identification information and the second identification information are the same, and if so, the terminal sends a ranging response wireless frame to a high-frequency ranging module of the base station 4 through the high-frequency ranging module of the terminal;
22. a high-frequency ranging module of the base station 4 receives the ranging response wireless frame, calculates the distance between the base station 4 and the terminal by adopting the ranging response wireless frame, and then sends the distance between the base station 4 and the terminal to a server;
23. and the server calculates the position of the terminal according to the position of each base station and the distance between each base station and the terminal.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the embodiments are not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the embodiments. Further, those skilled in the art will also appreciate that the embodiments described in the specification are presently preferred and that no particular act is required of the embodiments of the application.
Referring to fig. 5, a block diagram of a location system of a communication network according to an embodiment of the present application is shown, which may specifically include: a server 501, a base station 502 with a first high frequency ranging module, and a terminal 503 with a second high frequency ranging module:
the server 501 is configured to determine one or more first base stations from the base stations 502;
the first base station is used for sending a ranging request wireless frame to a second high-frequency ranging module of the terminal through a first high-frequency ranging module of the first base station;
the terminal 503 is configured to send a ranging response radio frame to the ranging request radio frame to the first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal;
the first base station is further configured to calculate, by using a first high-frequency ranging module of the first base station, distance information between the first base station and the terminal 503 by using the ranging response radio frame, and send the distance information to a server;
the server 501 is further configured to calculate the position of the terminal 503 by using the distance information between each first base station and the terminal 503.
In the embodiment of the present application, the ranging request radio frame includes second identification information for the ranging request radio frame;
the terminal 503 is further configured to compare the pre-acquired first identification information for the ranging request radio frame with the second identification information for the ranging request radio frame; and if the two radio frames are the same, the second high-frequency ranging module sends a ranging response radio frame aiming at the ranging request radio frame to the first high-frequency ranging module of the first base station.
In this embodiment of the present application, the server 501 is further configured to determine a second base station from the base stations 502, and send a positioning command request message to the second base station; the positioning command request message includes first identification information for a ranging request radio frame;
the second base station is configured to send a location request radio frame to the terminal 503 according to the location command request message, where the location request radio frame includes the first identification information for the ranging request radio frame.
In this embodiment of the present application, the terminal 503 is further configured to broadcast a positioning response radio frame after receiving the positioning request radio frame;
one or more base stations receiving the positioning response radio frame are configured to send a positioning command response message to the server 501 according to the positioning response radio frame;
the server 501 is further configured to determine the base station that sends the positioning command response message as the first base station.
In this embodiment of the present application, the server 501 is further configured to send a ranging command request message to the first base station; the ranging command request message includes second identification information for a ranging request radio frame;
the first base station is further configured to generate a ranging request radio frame by using the second identification information for the ranging request radio frame.
In an example of the embodiment of the present application, the terminal 503 is further configured to broadcast a positioning response radio frame through a second high-frequency ranging module of the terminal after receiving the positioning request radio frame;
and the base station is also used for receiving the positioning response wireless frame through a first high-frequency ranging module of the base station.
In this embodiment, the base station 502 further includes a first low frequency communication module, and the terminal 503 further includes a second low frequency communication module;
the second base station is further configured to send a location request wireless frame to a second low-frequency communication module of the terminal 503 through a first low-frequency communication module of the second base station.
In another example of the embodiment of the present application, the terminal 503 is further configured to broadcast a positioning response radio frame through a second low frequency communication module of the terminal after receiving the positioning request radio frame;
the base station is further used for receiving the positioning response wireless frame through a first low-frequency communication module of the base station.
In this embodiment of the present application, the first base station is further configured to determine, by a first high-frequency ranging module of the first base station, a sending time of a radio frame for sending a ranging request, and a receiving time of receiving the ranging response radio frame; and calculating the distance information between the first base station and the terminal 503 by using the sending time and the receiving time through a first high-frequency ranging module of the first base station.
For the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for relevant points.
An embodiment of the present application further provides an apparatus, including:
one or more processors; and
one or more machine-readable media having instructions stored thereon, which when executed by the one or more processors, cause the apparatus to perform methods as described in embodiments of the present application.
Embodiments of the present application also provide one or more machine-readable media having instructions stored thereon, which when executed by one or more processors, cause an apparatus to perform the methods described in embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one of skill in the art, embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed description is made on a positioning method of a communication network and a positioning system of a communication network provided by the present application, and a specific example is applied in the present application to explain the principle and the implementation of the present application, and the description of the above embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (20)
1. A method for positioning a communication network, the communication network comprising: the method comprises the following steps that the server, the base station with the first high-frequency ranging module and the terminal with the second high-frequency ranging module are connected, and the method comprises the following steps:
the server determining one or more first base stations;
the first base station sends a ranging request wireless frame to a second high-frequency ranging module of the terminal through a first high-frequency ranging module of the first base station;
the terminal sends a ranging response wireless frame aiming at the ranging request wireless frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal;
the first base station calculates the distance information between the first base station and the terminal by adopting the ranging response wireless frame through a first high-frequency ranging module of the first base station, and sends the distance information to a server;
the server calculates the position of the terminal by adopting the distance information between each first base station and the terminal;
the ranging response wireless frame is sent by the terminal when the first identification information and the second identification information are the same; the first identification information is sent to the terminal by a second base station; the second identification information is sent to the terminal by the first base station; the second base station is used for informing the terminal to broadcast a positioning response wireless frame; the first base station is a base station which receives the positioning response wireless frame.
2. The method of claim 1, wherein the ranging request radio frame comprises second identification information for the ranging request radio frame;
the step that the terminal sends a ranging response radio frame aiming at the ranging request radio frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal comprises the following steps:
the terminal compares first identification information which is obtained in advance and aims at the ranging request radio frame with second identification information which is obtained in advance and aims at the ranging request radio frame;
and if the two radio frames are the same, the terminal sends a ranging response radio frame aiming at the ranging request radio frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal.
3. The method of claim 2, further comprising:
the server determines a second base station and sends a positioning command request message to the second base station; the positioning command request message includes first identification information for a ranging request radio frame;
and the second base station sends a positioning request radio frame to the terminal according to the positioning command request message, wherein the positioning request radio frame comprises the first identification information aiming at the ranging request radio frame.
4. The method of claim 3, wherein the first base station is a base station that sends a positioning command response message to the server, and wherein the method further comprises:
after receiving the positioning request wireless frame, the terminal broadcasts a positioning response wireless frame;
and one or more base stations receiving the positioning response wireless frame send a positioning command response message to the server according to the positioning response wireless frame.
5. The method of claim 3, further comprising:
the server sends a ranging command request message to the first base station; the ranging command request message includes second identification information for a ranging request radio frame;
and the first base station generates a ranging request radio frame by adopting the second identification information aiming at the ranging request radio frame.
6. The method as claimed in claim 4, wherein the step of broadcasting a positioning response radio frame by the terminal after receiving the positioning request radio frame comprises:
after receiving the positioning request radio frame, the terminal broadcasts a positioning response radio frame through a second high-frequency ranging module of the terminal;
the method further comprises the following steps:
and one or more base stations receive the positioning response wireless frame through a first high-frequency ranging module of the one or more base stations.
7. The method of claim 4, wherein the base station further comprises a first low frequency communication module, and wherein the terminal further comprises a second low frequency communication module;
the step of sending a location request radio frame to the terminal by the second base station comprises:
and the second base station sends a positioning request wireless frame to a second low-frequency communication module of the terminal through a first low-frequency communication module of the second base station.
8. The method as claimed in claim 7, wherein the step of broadcasting a positioning response radio frame by the terminal after receiving the positioning request radio frame comprises:
after receiving the positioning request wireless frame, the terminal broadcasts a positioning response wireless frame through a second low-frequency communication module of the terminal;
the method further comprises the following steps:
and one or more base stations receive the positioning response wireless frame through a first low-frequency communication module of the one or more base stations.
9. The method of claim 1,
the first base station adopts the ranging response radio frame through a first high-frequency ranging module of the first base station, and the step of calculating the distance information between the first base station and the terminal comprises the following steps:
the first base station determines the sending time of a ranging request radio frame and the receiving time of the ranging response radio frame through a first high-frequency ranging module of the first base station;
and the first base station calculates the distance information between the first base station and the terminal by adopting the sending time and the receiving time through a first high-frequency ranging module of the first base station.
10. A positioning system for a communication network, comprising: the system comprises a server, a base station with a first high-frequency ranging module and a terminal with a second high-frequency ranging module, wherein the server comprises:
the server is used for determining one or more first base stations from the base stations;
the first base station is used for sending a ranging request wireless frame to a second high-frequency ranging module of the terminal through a first high-frequency ranging module of the first base station;
the terminal is used for sending a ranging response radio frame aiming at the ranging request radio frame to a first high-frequency ranging module of the first base station through a second high-frequency ranging module of the terminal;
the first base station is further used for calculating distance information between the first base station and the terminal by adopting the ranging response wireless frame through a first high-frequency ranging module of the first base station, and sending the distance information to a server;
the server is further used for calculating the position of the terminal by adopting the distance information between each first base station and the terminal;
the ranging response radio frame is sent by the terminal when the first identification information is the same as the second identification information; the first identification information is sent to the terminal by a second base station; the second identification information is sent to the terminal by the first base station; the second base station is used for informing the terminal to broadcast a positioning response wireless frame; the first base station is a base station which receives the positioning response wireless frame.
11. The system of claim 10, wherein the ranging request radio frame includes second identification information for the ranging request radio frame;
the terminal is further configured to compare first identification information, which is obtained in advance, for the ranging request radio frame with second identification information, which is obtained in advance, for the ranging request radio frame; and if the two radio frames are the same, the second high-frequency ranging module sends a ranging response radio frame aiming at the ranging request radio frame to the first high-frequency ranging module of the first base station.
12. The system of claim 11,
the server is also used for determining a second base station from the base stations and sending a positioning command request message to the second base station; the positioning command request message includes first identification information for a ranging request radio frame;
the second base station is configured to send a location request radio frame to the terminal according to the location command request message, where the location request radio frame includes the first identification information for the ranging request radio frame.
13. The system of claim 12,
the terminal is also used for broadcasting a positioning response wireless frame after receiving the positioning request wireless frame;
one or more base stations which receive the positioning response wireless frame are used for sending positioning command response messages to the server according to the positioning response wireless frame;
the server is further configured to determine the base station that sends the positioning command response message as the first base station.
14. The system of claim 12,
the server is further configured to send a ranging command request message to the first base station; the ranging command request message includes second identification information for a ranging request radio frame;
the first base station is further configured to generate a ranging request radio frame by using the second identification information for the ranging request radio frame.
15. The system of claim 13,
the terminal is also used for broadcasting a positioning response wireless frame through a second high-frequency ranging module after receiving the positioning request wireless frame;
and the base station is also used for receiving the positioning response wireless frame through a first high-frequency ranging module of the base station.
16. The system of claim 13, wherein the base station further comprises a first low frequency communication module, and wherein the terminal further comprises a second low frequency communication module;
the second base station is further configured to send a location request wireless frame to a second low-frequency communication module of the terminal through a first low-frequency communication module of the second base station.
17. The system of claim 16,
the terminal is also used for broadcasting a positioning response wireless frame through a second low-frequency communication module of the terminal after receiving the positioning request wireless frame;
the base station is further used for receiving the positioning response wireless frame through a first low-frequency communication module of the base station.
18. The system of claim 10,
the first base station is further used for determining the sending time of a ranging request radio frame and the receiving time of the ranging response radio frame through a first high-frequency ranging module of the first base station; and calculating the distance information between the first base station and the terminal by adopting the sending time and the receiving time through a first high-frequency ranging module of the first base station.
19. A positioning apparatus for a communication network, comprising:
one or more processors; and
one or more machine-readable media having instructions stored thereon that, when executed by the one or more processors, cause the apparatus to perform the method of any of claims 1-9.
20. One or more machine-readable media having instructions stored thereon, which when executed by one or more processors, cause an apparatus to perform the method of any of claims 1-9.
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| PCT/CN2019/075316 WO2019165899A1 (en) | 2018-03-02 | 2019-02-18 | Positioning method and system for communication network |
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| CN107231614A (en) * | 2017-06-23 | 2017-10-03 | 北京星网锐捷网络技术有限公司 | The method and master base station of a kind of label of positioning in the wireless network |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201939991A (en) | 2019-10-01 |
| WO2019165899A1 (en) | 2019-09-06 |
| CN110221243A (en) | 2019-09-10 |
| TWI785145B (en) | 2022-12-01 |
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