CN114666897B - Terminal positioning method, system, device and positioning server - Google Patents
Terminal positioning method, system, device and positioning server Download PDFInfo
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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Abstract
The application provides a terminal positioning method, a terminal positioning system, a terminal positioning device and a positioning server, and relates to the technical field of communication. The method comprises the following steps: obtaining a receiving power value of at least one reference signal of a terminal to be positioned, calculating an estimated distance value between the terminal to be positioned and at least one base station, calculating an ideal receiving power value of at least one reference signal according to the estimated distance value, correcting the receiving power value according to the ideal receiving power value, obtaining a corrected receiving power value, correcting the estimated distance value according to the corrected receiving power value, and obtaining a final distance value of the terminal to be positioned. The application can improve the precision of terminal positioning.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a terminal positioning method, system, device, and positioning server.
Background
With the development of communication services, location services play an important role as an indispensable part of mobile communication or personal communication services.
In one existing terminal positioning method, the distance between a base station and a terminal can be calculated by measuring the attenuation degree of a positioning reference signal between the base station and the terminal.
However, in the above scheme, a fixed formula is generally adopted to calculate the distance, when the terminal is blocked by an obstacle, the attenuation degree of the signal increases, and because the obstacle is unpredictable, the error of calculating the distance according to the attenuation degree of the signal increases, so that the positioning accuracy is seriously affected.
Disclosure of Invention
The invention aims to provide a terminal positioning method, a system, a device and a positioning server aiming at the defects in the prior art so as to improve the terminal positioning precision.
In order to achieve the above purpose, the technical scheme adopted by the embodiment of the application is as follows:
in a first aspect, an embodiment of the present application provides a terminal positioning method, which is applied to a positioning server, where the method includes:
acquiring a receiving power value of at least one reference signal of a terminal to be positioned;
calculating an estimated distance value between the terminal to be positioned and at least one base station;
calculating an ideal reception power value of the at least one reference signal according to the estimated distance value;
correcting the receiving power value according to the ideal receiving power value to obtain a corrected receiving power value;
and correcting the estimated distance value according to the corrected receiving power value to obtain a final distance value of the terminal to be positioned.
Optionally, the reference signal is a downlink positioning signal sent by at least one base station and received by the terminal to be positioned, or an uplink probing signal sent by the terminal to be positioned and received by the at least one base station.
Optionally, before calculating the ideal received power value of the at least one reference signal according to the estimated distance value, the method further includes:
acquiring a plurality of ideal receiving power values of a test signal under a plurality of test distance values;
Determining the corresponding relation between the distance values and the ideal receiving power values according to the plurality of test distance values and the plurality of ideal receiving power values;
Said calculating an ideal received power value of said at least one reference signal based on said estimated distance value comprises:
and calculating the ideal receiving power value of the at least one reference signal according to the estimated distance value and the corresponding relation between the distance value and the ideal receiving power value.
Optionally, the correcting the receiving power value according to the ideal receiving power value to obtain a corrected receiving power value includes:
if the receiving power value is smaller than the ideal receiving power value, calculating a difference value between the receiving power value and the ideal receiving power value;
and if the difference value is larger than a preset difference value threshold value, correcting the receiving power value to obtain a corrected receiving power value.
Optionally, if the difference is greater than a preset difference threshold, correcting the received power value to obtain a corrected received power value, including:
acquiring receiving power values of reference signals of a plurality of peripheral terminals in a preset range, wherein the preset range is a range taking the base station as a center and the estimated distance value as a radius;
screening the received power values of the reference signals of the plurality of peripheral terminals to obtain a peripheral received power value set;
And correcting the receiving power value according to the peripheral receiving power value set to obtain the corrected receiving power value.
Optionally, the correcting the receiving power value according to the peripheral receiving power value set to obtain the corrected receiving power value includes:
Calculating the peripheral receiving power value set by adopting a preset calculating method to obtain the corrected receiving power value, wherein the preset calculating method comprises the following steps: one of maximum value calculation, average value calculation, or weighted average value calculation.
Optionally, if the reference signal includes a plurality of reference signals, the correcting the estimated distance value according to the corrected received power value to obtain a final distance value of the terminal to be located includes:
Correcting the estimated distance values according to the corrected receiving power values to obtain corrected distance values;
And obtaining the final distance value according to the plurality of corrected distance values.
In a second aspect, an embodiment of the present application further provides a terminal positioning system, where the system includes: the terminal to be positioned, at least one base station and a positioning server;
The terminal to be positioned is accessed to a core network through the at least one base station, and the core network is also in communication connection with the positioning server, and the positioning server is used for executing the steps of the terminal positioning method in any of the above embodiments.
In a third aspect, an embodiment of the present application further provides a terminal positioning device, applied to a positioning server, where the device includes:
The acquisition module is used for acquiring the receiving power value of at least one reference signal of the terminal to be positioned;
a first calculation module, configured to calculate an estimated distance value between the terminal to be located and at least one base station;
the second calculation module is further used for calculating an ideal receiving power value of the at least one reference signal according to the estimated distance value;
The first correction module is used for correcting the receiving power value according to the ideal receiving power value to obtain a corrected receiving power value;
And the second correction module is used for correcting the estimated distance value according to the corrected receiving power value to obtain the final distance value of the terminal to be positioned.
Optionally, the reference signal is a downlink positioning signal sent by at least one base station and received by the terminal to be positioned, or an uplink probing signal sent by the terminal to be positioned and received by the at least one base station.
Optionally, the apparatus further includes: a relationship determination module;
The acquisition module is further used for acquiring a plurality of ideal receiving power values of the test signal under a plurality of test distance values;
The relation determining module is used for determining the corresponding relation between the distance value and the ideal receiving power value according to the plurality of test distance values and the plurality of ideal receiving power values;
The second calculating module is specifically configured to calculate an ideal receiving power value of the at least one reference signal according to the estimated distance value and a corresponding relationship between the distance value and the ideal receiving power value.
Optionally, the first correction module includes:
A difference calculating unit, configured to calculate a difference between the reception power value and the ideal reception power value if the reception power value is smaller than the ideal reception power value;
And the first correction unit is used for correcting the receiving power value if the difference value is larger than a preset difference value threshold value, and obtaining a corrected receiving power value.
Optionally, the first correction unit includes: a screening subunit and a first correction subunit;
The acquisition module is further configured to acquire reception power values of reference signals of a plurality of peripheral terminals within a preset range, where the preset range is a range with the base station as a center and the estimated distance value as a radius;
A screening subunit, configured to screen the received power values of the reference signals of the plurality of peripheral terminals to obtain a peripheral received power value set;
And the first correction subunit is used for correcting the receiving power value according to the peripheral receiving power value set to obtain the corrected receiving power value.
Optionally, the first correction subunit is specifically configured to calculate the peripheral receiving power value set by using a preset calculation method to obtain the corrected receiving power value, where the preset calculation method is: one of maximum value calculation, average value calculation, or weighted average value calculation.
Optionally, if a plurality of reference signals are included, the second correction module includes:
the distance correction unit is used for correcting the estimated distance values according to the corrected receiving power values to obtain corrected distance values;
and the distance calculation unit is used for obtaining the final distance value according to the plurality of corrected distance values.
In a fourth aspect, an embodiment of the present application further provides a positioning server, including: the terminal positioning system comprises a processor, a storage medium and a bus, wherein the storage medium stores program instructions executable by the processor, when a positioning server runs, the processor and the storage medium are communicated through the bus, and the processor executes the program instructions to execute the steps of the terminal positioning method according to any one of the embodiments.
In a fifth aspect, embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor performs the steps of the data processing method according to any of the above embodiments.
The beneficial effects of the application are as follows:
The application provides a terminal positioning method, a system, a device and a positioning server, wherein the terminal positioning method is applied to the positioning server and comprises the following steps: obtaining a receiving power value of at least one reference signal of a terminal to be positioned, calculating an estimated distance value between the terminal to be positioned and at least one base station, calculating an ideal receiving power value of at least one reference signal according to the estimated distance value, correcting the receiving power value according to the ideal receiving power value, obtaining a corrected receiving power value, correcting the estimated distance value according to the corrected receiving power value, and obtaining a final distance value of the terminal to be positioned. The application corrects the receiving power value by adopting the ideal receiving power value, so as to determine the final distance value according to the corrected receiving power value, realize the accurate positioning of the terminal to be positioned and improve the positioning precision of the terminal.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a network architecture of a terminal positioning method according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of a terminal positioning system according to an embodiment of the present application;
fig. 3 is a schematic flow chart of a terminal positioning method according to an embodiment of the present application;
fig. 4 is a flowchart of another terminal positioning method according to an embodiment of the present application;
fig. 5 is a flowchart of another terminal positioning method according to an embodiment of the present application;
fig. 6 is a flowchart of another terminal positioning method according to an embodiment of the present application;
Fig. 7 is a schematic diagram of a terminal positioning according to an embodiment of the present application;
Fig. 8 is a flowchart of still another terminal positioning method according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a terminal positioning device according to an embodiment of the present application;
Fig. 10 is a schematic diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Furthermore, the terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
Referring to fig. 1, a network architecture diagram of a terminal positioning method according to an embodiment of the present application, as shown in fig. 1, may specifically include the following network elements:
1. Terminal Equipment (UE): a user equipment, terminal, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user device may also be referred to. The UE may also be a cellular phone, a cordless phone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL), a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a car-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc., as well as an end device, a logical entity, a smart device, such as a mobile phone, a terminal device such as a smart terminal, or a communication device such as a server, gateway, base station, controller, etc., or an internet of things device, such as a sensor, an electricity meter, a water meter, etc., internet of things (Internet of things, ioT) device.
2. Access Network (AN): the network access function is provided for authorized users in a specific area, and transmission tunnels with different qualities can be used according to the level of the users, the requirements of services and the like. The access network may be an access network employing different access technologies. There are two types of current radio access technologies: third generation partnership project (3rd Generation Partnership Project,3GPP) access technologies (e.g., radio access technologies employed in 3G, 4G, or 5G systems) and non-third generation partnership project (non-3 GPP) access technologies. The 3GPP access technology refers to an access technology conforming to the 3GPP standard specification, and an access network employing the 3GPP access technology is referred to as a Radio access network (Radio Access Network, RAN), wherein access network devices in the 5G system are referred to as next generation base station nodes (next generation Node Base station, gNB), for example, base station devices in cellular mobile communications including, but not limited to, general Packet Radio Service (GPRS) base stations (GENERAL PACKET), code Division multiple access (Code Division Multiple Access, CDMA), CDMA2000, wideband code Division multiple access (W-CDMA), time Division multiple access (TD-CDMA), long term evolution (Long Term Evolution, LTE), 5G new air interface (5G New Radio,5G NR), and the like. The non-3GPP access technology refers to an access technology that does not conform to the 3GPP standard specification, for example, an air interface technology typified by an Access Point (AP) in wifi.
An access network implementing access network functions based on wireless communication technology may be referred to as a radio access network (Radio Access Network, RAN). The radio access network can manage radio resources, provide access service for the terminal, and further complete the forwarding of control signals and user data between the terminal and the core network.
3. Access and mobility management function (ACCESS AND Mobility management Function, AMF) entity: the method is mainly used for mobility management, access management and the like, such as legal interception, access authorization (or authentication) and the like. In the embodiment of the application, the method and the device can be used for realizing the functions of the access and mobile management network elements.
4. Location management function (Location Management Function, LMF) entity: supporting positioning calculation, obtaining downlink positioning measurement results or positioning estimation from a terminal, obtaining uplink positioning measurement results from a RAN (Radio Access Network ) side, obtaining auxiliary data from a RAN side, and the like.
Referring to fig. 2, a schematic structural diagram of a terminal positioning system according to an embodiment of the present application is shown in fig. 2, where the system includes: a terminal 100 to be located, at least one base station 200 and a location server 300.
The terminal 100 to be located may be any of the foregoing terminal devices, and may access a core network through at least one base station 200, where the core network is further communicatively connected to a location server 300, and the location server 300 is configured to obtain a reception power value of at least one reference signal of the terminal 100 to be located, calculate an estimated distance value between the terminal 100 to be located and the at least one base station 200 according to the reception power value of the reference signal, calculate an ideal reception power value of the at least one reference signal according to the estimated distance value, correct the reception power value according to the ideal reception power value, obtain a corrected reception power value, and correct the estimated distance value according to the corrected reception power value, to obtain a final distance value of the terminal 100 to be located.
In this embodiment, the base station 200 is used as an access network device, so that the terminal 100 to be located accesses to the 5G core network through the base station 200, and the location server 300 also accesses to the 5G core network, and when the terminal 100 to be located communicates with the plurality of base stations 200, the connections with the plurality of base stations 200 are registered in the 5G core network respectively. The reference signal may be a downlink positioning signal sent by the base station 200 to the terminal 100 to be positioned, or may be an uplink detection signal sent by the terminal 100 to be positioned to the base station 200, after the terminal 100 to be positioned receives the downlink positioning signal, the base station 200 calculates a reception power value of the downlink positioning signal according to the signal strength of the downlink positioning signal, after the terminal 200 receives the uplink positioning signal, calculates a reception power value of the uplink positioning signal according to the signal strength of the uplink positioning signal, and the reception power value of at least one reference signal of the terminal 100 to be positioned acquired by the positioning server 300 may be a reception power value of the downlink positioning signal or a reception power value of the uplink positioning signal.
On the basis of the above embodiments, the embodiments of the present application provide a terminal positioning method applied to a positioning server in the above terminal positioning system. Referring to fig. 3, a flow chart of a terminal positioning method according to an embodiment of the present application is shown in fig. 3, where the method includes:
S10: and acquiring the receiving power value of at least one reference signal of the terminal to be positioned.
In this embodiment, the positioning server obtains, through the AMF, a reception power value of at least one reference signal of the terminal to be positioned, where the reception power value of the reference signal is calculated by the terminal to be positioned or the base station according to the signal strength of the received reference signal.
In an alternative embodiment, the reference signal is a downlink positioning signal sent by at least one base station and received by the terminal to be positioned, or an uplink probing signal sent by the terminal to be positioned and received by at least one base station.
In this embodiment, the reference signal may be a downlink positioning signal sent by the base station to the terminal to be positioned, or may be an uplink detection signal sent by the terminal to be positioned to the base station, where after receiving the downlink positioning signal, the terminal to be positioned calculates a receiving power value of the downlink positioning signal according to the signal strength of the downlink positioning signal, and the positioning server obtains the receiving power value of the downlink positioning signal through the AMF; after receiving the uplink detection signal, the base station calculates the receiving power value of the uplink detection signal according to the signal strength of the uplink detection signal, and the positioning server obtains the receiving power value of the uplink detection signal through the AMF.
S20: an estimated distance value between the terminal to be located and at least one base station is calculated.
In this embodiment, a preset positioning method may be used to calculate an estimated distance value between the terminal to be positioned and the base station. For example, the preset positioning method may be a Round Trip Time (RRT) calculation method, an uplink arrival angle (UpLink Angle Of Arrival, UL-AOA) calculation method, or a downlink arrival angle (DownLink Angle Of Arrival, DL-AOA) calculation method, where the Round Trip Time calculation method is: the time from the start of sending the reference signal to the terminal or the base station to the time when receiving the acknowledgement signal is multiplied by the speed of light and divided by 2, namely the distance between the terminal to be located and the base station, so as to further improve the calculation accuracy, the time required for receiving the reference signal and sending the acknowledgement signal can be subtracted on the basis of the time. The uplink arrival angle calculating method comprises the following steps: the method comprises the steps that a terminal to be positioned sends an uplink detection signal to a base station, the base station measures a signal arrival angle according to a wave beam of the uplink detection signal, the signal arrival angle is sent to a positioning server, and the positioning server calculates the position of the terminal to be positioned according to the signal arrival angle; the downlink arrival angle calculating method is that a base station sends a downlink positioning signal to a terminal to be positioned, the base station measures the arrival angle of the signal according to the wave beam of the downlink positioning signal, the arrival angle of the signal is sent to a positioning server, and the positioning server calculates the position of the terminal to be positioned according to the arrival angle of the signal.
S30: an ideal reception power value of at least one reference signal is calculated based on the estimated distance value.
In this embodiment, according to the corresponding relationship between the estimated distance value and the receiving power value, which are determined in advance in an ideal state, the ideal receiving power value of the reference signal under the estimated distance value is determined for the terminal to be located and the base station, where the ideal state refers to a state where no obstacle shielding exists between the terminal to be located and the base station.
S40: and correcting the receiving power value according to the ideal receiving power value to obtain a corrected receiving power value.
In this embodiment, when there is an obstacle blocking between the terminal to be located and the base station, the signal attenuation degree is large, and the blocking condition of the obstacle is unpredictable, and the fixed relationship between the attenuation degree and the distance value can only be adapted to a single fixed scene, but in a dynamically changing scene, the obstacle is not fixedly present between the terminal to be located and the base station, so that the error of calculating the distance between the terminal to be located and the base station according to the preset corresponding relationship between the attenuation degree and the distance value is large. Therefore, it is necessary to determine whether an obstacle exists between the terminal to be positioned and the base station according to the ideal reception power value and the reception power value, and if so, correct the reception power value according to the ideal calculation power value to obtain a corrected reception power value.
S50: and correcting the estimated distance value according to the corrected receiving power value to obtain a final distance value of the terminal to be positioned.
In this embodiment, the corresponding relationship between the estimated distance value and the receiving power value is adopted, and a corrected distance value corresponding to the corrected receiving power value is calculated, and the corrected distance value is used as the final distance value of the terminal to be positioned.
According to the terminal positioning method provided by the embodiment of the application, the receiving power value of at least one reference signal of the terminal to be positioned is obtained, the estimated distance value between the terminal to be positioned and at least one base station is calculated, the ideal receiving power value of at least one reference signal is calculated according to the estimated distance value, the receiving power value is corrected according to the ideal receiving power value, the corrected receiving power value is obtained, the estimated distance value is corrected according to the corrected receiving power value, and the final distance value of the terminal to be positioned is obtained. According to the embodiment of the application, the ideal receiving power value is adopted to correct the receiving power value, so that the final distance value is determined according to the corrected receiving power value, the accurate positioning of the terminal to be positioned is realized, and the positioning precision of the terminal is improved.
On the basis of the embodiment, the embodiment of the application also provides another terminal positioning method. Referring to fig. 4, a flowchart of another terminal positioning method according to an embodiment of the present application is shown in fig. 4, and the method further includes:
s61: and acquiring a plurality of ideal receiving power values of the test signal under a plurality of test distance values.
In this embodiment, the plurality of test distance values are a plurality of known distance values between the terminal and the base station to be positioned, and under the condition that the plurality of known distance values and no obstacle exists between the terminal and the base station, the terminal or the base station transmits a test signal, and if the terminal transmits the test signal, the base station calculates an ideal receiving power value according to the intensity of the received test signal; if the base station transmits the test signal, the terminal calculates an ideal receiving power value according to the intensity of the received test signal.
S62: and determining the corresponding relation between the distance value and the ideal receiving power value according to the plurality of testing distance values and the plurality of ideal receiving power values.
In this embodiment, the positioning server performs linear fitting on the plurality of test distance values and the plurality of ideal receiving power values according to the plurality of ideal receiving power values of the plurality of test signals at the plurality of test distances, and determines a correspondence between the distance values and the ideal receiving power values.
The step S30 includes:
and calculating the ideal receiving power value of at least one reference signal according to the estimated distance value and the corresponding relation between the distance value and the ideal receiving power value.
In this embodiment, after determining the estimated distance value corresponding to the receiving power value according to the fixed relation between the attenuation degree and the distance value, the ideal receiving power value corresponding to the estimated distance value is determined according to the corresponding relation between the distance value and the ideal receiving power value.
According to the terminal positioning method provided by the embodiment of the application, the plurality of ideal receiving power values of the test signal are obtained under the plurality of test distance values, the corresponding relation between the distance values and the ideal receiving power values is determined according to the plurality of test distance values and the plurality of ideal receiving power values, and the ideal receiving power value of at least one reference signal is calculated according to the estimated distance values and the corresponding relation between the distance values and the ideal receiving power values. According to the embodiment of the application, the corresponding relation between the distance value and the ideal receiving power value is established, so that the ideal receiving power value corresponding to each estimated distance value can be conveniently determined, and the efficiency and the precision of terminal positioning are improved.
On the basis of the embodiment, the embodiment of the application also provides a terminal positioning method. Referring to fig. 5, a flowchart of another terminal positioning method according to an embodiment of the present application is shown in fig. 5, where S40 includes:
s41: if the received power value is smaller than the ideal received power value, calculating the difference between the received power value and the ideal received power value.
In this embodiment, in a dynamically changing scenario, the obstacle is not fixedly present between the terminal to be located and the base station, and after the positioning server obtains the receiving power values of the reference signals, it is unable to determine whether the obstacle exists between the terminal to be located and the base station according to the receiving power values. Since the ideal reception power value refers to the reception power value of the reference signal in the case that there is no shielding between the terminal to be located and the base station, it is possible to determine whether there is an obstacle between the terminal to be located and the base station according to the ideal reception power value. If the receiving power value is smaller than the ideal receiving power value, the terminal to be positioned and the base station possibly have obstacle shielding, and whether the obstacle shielding exists is further determined by calculating the difference value between the receiving power value and the ideal receiving power value.
S42: and if the difference value is larger than the preset difference value threshold value, correcting the receiving power value to obtain a corrected receiving power value.
In this embodiment, by setting a preset difference threshold, when the difference between the received power value and the ideal received power value is greater than the preset difference threshold, it is determined that there is an obstacle shielding between the terminal to be located and the base station, and a preset correction method is adopted to correct the received power value, so as to obtain a corrected received power value. For example, the received power value may be corrected according to the difference between the received power value and the ideal received power value, to obtain a corrected received power value.
In an alternative embodiment, if the received power value is greater than or equal to the ideal received power value, it is determined that no obstacle exists between the terminal and the base station, and no correction is required for the received power value; if the received power value is smaller than the ideal received power value but the difference value is smaller than or equal to the preset difference value threshold, the error of the received power value is determined to be in a specified range, and the received power value is not required to be corrected.
According to the terminal positioning method provided by the embodiment of the application, if the receiving power value is smaller than the ideal receiving power value, the difference value between the receiving power value and the ideal receiving power value is calculated, and if the difference value is larger than the preset difference value threshold value, the receiving power value is corrected, and the corrected receiving power value is obtained. The embodiment of the application judges whether the received power value needs to be corrected or not by comparing the received power value with the ideal received power value and the preset difference threshold, and corrects the received power value when the received power value needs to be corrected is determined, so that the estimated distance value is corrected according to the corrected received power value, a final distance value is obtained, and the positioning precision of the terminal is improved.
On the basis of the embodiment, the embodiment of the application also provides a terminal positioning method. Referring to fig. 6, a flowchart of another terminal positioning method according to an embodiment of the present application is shown in fig. 6, where S42 includes:
s421: and acquiring the received power values of the reference signals of the plurality of peripheral terminals in a preset range, wherein the preset range is a range taking the base station as a center and the estimated distance value as a radius.
In this embodiment, a communication coverage area of a base station includes a plurality of terminals accessing a 5G core network through the base station, and a plurality of peripheral terminals within a preset range are determined with the base station as a center and an estimated distance value as a radius, so as to obtain reception power values of reference signals of the plurality of peripheral terminals, where the reference signals of the peripheral terminals may be downlink positioning signals sent by the base station received by the peripheral terminals or uplink probing signals sent by the peripheral terminals received by the base station.
S422: and screening the received power values of the reference signals of the plurality of peripheral terminals to obtain a peripheral received power value set.
In this embodiment, due to the shielding of the obstacle, the received power value of the reference signal of the terminal to be located may be attenuated greatly, and in order to correct the received power value of the reference signal of the terminal to be located according to the received power value of the reference signal of the peripheral terminal, the peripheral terminal that is not shielded by the obstacle needs to be screened out from the plurality of peripheral terminals. Specifically, the received power values of the reference signals of the plurality of peripheral terminals are screened, and peripheral terminals with the received power values larger than the received power values of the reference signals of the terminals to be positioned are selected to obtain a peripheral received power value set.
S423: and correcting the receiving power value according to the peripheral receiving power value set to obtain a corrected receiving power value.
In this embodiment, according to the reception power values of a plurality of peripheral terminals in the set of peripheral reception power values, the reception power value of the terminal to be located is corrected, and the corrected reception power value is obtained.
In an alternative embodiment, a preset calculation method is adopted to calculate the peripheral receiving power value set, so as to obtain a corrected receiving power value, and the preset calculation method is as follows: one of maximum value calculation, average value calculation, or weighted average value calculation.
In this embodiment, a preset calculation method is adopted to calculate the peripheral receiving power value set, and the receiving power value of the terminal to be located is corrected according to the calculation result, so as to obtain a corrected receiving power value. For example, if the preset calculation method is maximum calculation, determining a maximum peripheral receiving power value in the peripheral receiving power value set, and correcting the receiving power value of the terminal to be positioned according to the maximum peripheral receiving power value; if the preset calculation method is average calculation, averaging a plurality of peripheral receiving power values in the peripheral receiving power value set to obtain an average peripheral receiving power value, and correcting the receiving power value of the terminal to be positioned according to the average peripheral receiving power value; if the preset calculation method is weighted average calculation, performing weighted average on a plurality of peripheral receiving power values in the peripheral receiving power value set, wherein the larger the peripheral receiving power value is, the higher the weight value is, obtaining weighted average peripheral receiving power value, and correcting the receiving power value of the terminal to be positioned according to the weighted average peripheral receiving power value.
For example, please refer to fig. 7, which is a schematic diagram of terminal positioning provided in an embodiment of the present application, as shown in fig. 7, a peripheral terminal with a base station as a center and an estimated distance value as a radius is determined, a set of peripheral receiving power values is determined according to the receiving power values of reference signals of the peripheral terminal, the receiving power values of the terminal to be positioned are corrected according to the set of peripheral receiving power values, and a final distance value is determined according to the corrected receiving power values.
According to the terminal positioning method provided by the embodiment of the application, the receiving power values of the reference signals of the plurality of peripheral terminals in the preset range are obtained, the preset range is the range taking the base station as the center and the estimated distance value as the radius, the receiving power values of the reference signals of the plurality of peripheral terminals are screened to obtain the peripheral receiving power value set, and the receiving power values are corrected according to the peripheral receiving power value set to obtain the corrected receiving power values. According to the embodiment of the application, the receiving power value of the reference signal of the terminal to be positioned is corrected through the receiving power value of the reference signal of the peripheral terminal, so that the estimated distance value is corrected according to the corrected receiving power value, a final distance value is obtained, and the positioning precision of the terminal is improved.
On the basis of the embodiment, the embodiment of the application also provides another terminal positioning method. Referring to fig. 8, a flowchart of still another terminal positioning method according to an embodiment of the present application is shown in fig. 8, where the step S50 includes:
S51: and correcting the plurality of estimated distance values according to the plurality of corrected receiving power values to obtain a plurality of corrected distance values.
In this embodiment, the plurality of reference signals may be a plurality of reference signals transmitted between the terminal to be located and one base station, or may be a plurality of reference signals transmitted between the terminal to be located and a plurality of base stations, the location server obtains a plurality of received power values of the plurality of reference signals of the terminal to be located, calculates an estimated distance value between the terminal to be located and the plurality of base stations, calculates an ideal received power value of the plurality of reference signals according to the estimated distance value, respectively determines whether the received power value and each ideal received power value satisfy a preset condition, if so, respectively calculates a difference between the received power value and the ideal received power value satisfying the preset condition, respectively corrects the received power value according to the plurality of differences to increase the received power value, obtains a plurality of corrected received power values, corrects the plurality of estimated distance values according to the plurality of corrected received power values, and obtains a plurality of corrected distance values, where the preset condition may be that the received power value is smaller than the ideal received power value, and the difference between the received power value and the ideal received power value is greater than a preset difference threshold.
S52: and obtaining a final distance value according to the plurality of corrected distance values.
In this embodiment, a preset calculation method is adopted to calculate a plurality of corrected distance values to obtain a final distance value, and the preset calculation method may include: the present application is not limited in this regard as to one of maximum value calculation, average value calculation, or weighted average value calculation.
If the terminal positioning method provided by the embodiment of the application comprises a plurality of reference signals, correcting a plurality of estimated distance values according to a plurality of corrected received power values to obtain a plurality of corrected distance values, and obtaining a final distance value according to the plurality of corrected distance values. According to the embodiment of the application, the plurality of estimated distance values are corrected according to the corrected receiving power values of the plurality of reference signals, so that the final distance value is obtained according to the plurality of corrected distance values, and the positioning precision of the terminal is improved.
On the basis of the foregoing embodiments, the embodiment of the present application further provides a terminal positioning device, please refer to fig. 9, which is a schematic structural diagram of the terminal positioning device provided in the embodiment of the present application, as shown in fig. 9, and the device includes:
An acquisition module 10, configured to acquire a reception power value of at least one reference signal of a terminal to be located;
a first calculation module 20, configured to calculate an estimated distance value between the terminal to be located and at least one base station;
The second calculating module 30 is further configured to calculate an ideal receiving power value of at least one reference signal according to the estimated distance value;
a first correction module 40, configured to correct the reception power value according to the ideal reception power value, to obtain a corrected reception power value;
And the second correction module 50 is configured to correct the estimated distance value according to the corrected received power value, so as to obtain a final distance value of the terminal to be positioned.
Optionally, the reference signal is a downlink positioning signal sent by at least one base station and received by the terminal to be positioned, or an uplink probing signal sent by the terminal to be positioned and received by at least one base station.
Optionally, the apparatus further comprises: a relationship determination module;
the acquisition module 10 is further configured to acquire a plurality of ideal receiving power values of the test signal under a plurality of test distance values;
The relation determining module is used for determining the corresponding relation between the distance value and the ideal receiving power value according to the plurality of test distance values and the plurality of ideal receiving power values;
the second calculating module 30 is specifically configured to calculate the ideal receiving power value of the at least one reference signal according to the estimated distance value and the corresponding relationship between the distance value and the ideal receiving power value.
Optionally, the first correction module 40 includes:
A difference calculating unit for calculating the difference between the received power value and the ideal received power value if the received power value is smaller than the ideal received power value;
And the first correction unit is used for correcting the receiving power value if the difference value is larger than a preset difference value threshold value, and obtaining the corrected receiving power value.
Optionally, the first correction unit includes: a screening subunit and a first correction subunit;
the acquiring module 10 is further configured to acquire receiving power values of reference signals of a plurality of peripheral terminals within a preset range, where the preset range is a range with the base station as a center and the estimated distance value as a radius;
A screening subunit, configured to screen the received power values of the reference signals of the plurality of peripheral terminals to obtain a peripheral received power value set;
And the first correction subunit is used for correcting the receiving power value according to the peripheral receiving power value set to obtain a corrected receiving power value.
Optionally, the first correction subunit is specifically configured to calculate the peripheral receiving power value set by using a preset calculation method, so as to obtain a corrected receiving power value, where the preset calculation method is: one of maximum value calculation, average value calculation, or weighted average value calculation.
Optionally, if a plurality of reference signals are included, the second correction module 50 includes:
The distance correction unit is used for correcting the estimated distance values according to the corrected received power values to obtain corrected distance values;
and the distance calculation unit is used for obtaining a final distance value according to the plurality of corrected distance values.
The foregoing apparatus is used for executing the method provided in the foregoing embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
The above modules may be one or more integrated circuits configured to implement the above methods, for example: one or more Application SPECIFIC INTEGRATED Circuits (ASIC), or one or more microprocessors, or one or more field programmable gate arrays (Field Programmable GATE ARRAY FPGA), etc. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Referring to fig. 10, a schematic diagram of an electronic device according to an embodiment of the present application is provided, and the positioning server 300 includes: processor 301, storage medium 302, and bus, storage medium 302 storing program instructions executable by processor 301, processor 301 and storage medium 302 communicating over the bus when positioning server 300 is running, processor 301 executing the program instructions to perform the above-described method embodiments. The specific implementation manner and the technical effect are similar, and are not repeated here.
Optionally, the present invention further provides a computer readable storage medium having stored thereon a computer program for performing the above-described method embodiments when the computer program is executed by a processor.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform some of the steps of the methods according to the embodiments of the invention. And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
The foregoing is merely illustrative of embodiments of the present invention, and the present invention is not limited thereto, and any changes or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and the present invention is intended to be covered by the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (8)
1. A terminal positioning method, applied to a positioning server, comprising:
acquiring a receiving power value of at least one reference signal of a terminal to be positioned;
calculating an estimated distance value between the terminal to be positioned and at least one base station;
According to the corresponding relation between the distance value and the receiving power value which are determined in the ideal state in advance, determining the ideal receiving power value of the at least one reference signal under the estimated distance value, wherein the ideal state indicates the state that no obstacle shielding exists between the terminal and the base station;
correcting the receiving power value according to the ideal receiving power value to obtain a corrected receiving power value;
Correcting the estimated distance value according to the corrected receiving power value to obtain a final distance value of the terminal to be positioned;
The step of correcting the receiving power value according to the ideal receiving power value to obtain a corrected receiving power value comprises the following steps:
if the receiving power value is smaller than the ideal receiving power value, calculating a difference value between the receiving power value and the ideal receiving power value;
if the difference value is larger than a preset difference value threshold value, acquiring the receiving power values of the reference signals of a plurality of peripheral terminals in a preset range, wherein the preset range is a range taking the base station as a center and the estimated distance value as a radius;
screening the received power values of the reference signals of the plurality of peripheral terminals, and selecting peripheral terminals which are not shielded by the barrier and have the received power value larger than the received power value of the terminal to be positioned to obtain a peripheral received power value set;
and calculating the peripheral receiving power value set by adopting a preset calculation method, and correcting the receiving power value of the terminal to be positioned according to a calculation result to obtain the corrected receiving power value.
2. The method of claim 1, wherein the reference signal is a downlink positioning signal sent by at least one base station and received by the terminal to be positioned, or an uplink probing signal sent by the terminal to be positioned and received by the at least one base station.
3. The method according to claim 1 or 2, wherein before determining the ideal reception power value of the at least one reference signal at the estimated distance value according to a correspondence between a distance value and a reception power value determined in an ideal state in advance, the method further comprises:
Acquiring a plurality of ideal receiving power values of a test signal transmitted under a plurality of test distance values, wherein the ideal receiving power values are receiving power values for respectively transmitting the test signal based on the plurality of test distance values under the condition that no barrier exists between a terminal and at least one base station;
And determining the corresponding relation between the distance value and the ideal receiving power value according to the plurality of testing distance values and the plurality of ideal receiving power values.
4. The method according to claim 1, wherein the preset calculation method is: one of maximum value calculation, average value calculation, or weighted average value calculation.
5. The method according to claim 1, wherein if a plurality of reference signals are included, the correcting the estimated distance value according to the corrected received power value to obtain a final distance value of the terminal to be located includes:
Correcting the estimated distance values according to the corrected receiving power values to obtain corrected distance values;
And obtaining the final distance value according to the plurality of corrected distance values.
6. A terminal positioning system, the system comprising: the terminal to be positioned, at least one base station and a positioning server;
the terminal to be positioned is accessed to a core network through the at least one base station, and the core network is also in communication connection with the positioning server, and the positioning server is used for executing the steps of the terminal positioning method according to any one of the claims 1-5.
7. A terminal positioning device, characterized by being applied to a positioning server, the device comprising:
The acquisition module is used for acquiring the receiving power value of at least one reference signal of the terminal to be positioned;
a first calculation module, configured to calculate an estimated distance value between the terminal to be located and at least one base station;
The second calculation module is further used for determining an ideal receiving power value of the at least one reference signal under the estimated distance value according to the corresponding relation between the distance value and the receiving power value which are determined in the ideal state in advance, wherein the ideal state indicates a state that no obstacle shielding exists between the terminal and the base station;
The first correction module is used for correcting the receiving power value according to the ideal receiving power value to obtain a corrected receiving power value;
the second correction module is used for correcting the estimated distance value according to the corrected receiving power value to obtain a final distance value of the terminal to be positioned;
The first correction module is specifically configured to calculate a difference between the reception power value and the ideal reception power value if the reception power value is smaller than the ideal reception power value; if the difference value is larger than a preset difference value threshold value, acquiring the receiving power values of the reference signals of a plurality of peripheral terminals in a preset range, wherein the preset range is a range taking the base station as a center and the estimated distance value as a radius; screening the received power values of the reference signals of the plurality of peripheral terminals, and selecting peripheral terminals which are not shielded by the barrier and have the received power value larger than the received power value of the terminal to be positioned to obtain a peripheral received power value set; and calculating the peripheral receiving power value set by adopting a preset calculating method, and correcting the receiving power value of the terminal to be positioned according to a settlement result to obtain the corrected receiving power value.
8. A positioning server, comprising: a processor, a storage medium and a bus, the storage medium storing program instructions executable by the processor, the processor and the storage medium communicating over the bus when the positioning server is running, the processor executing the program instructions to perform the steps of the terminal positioning method according to any one of claims 1 to 5.
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| CN105828435A (en) * | 2016-05-30 | 2016-08-03 | 天津大学 | Distance correction weighted centroid localization method based on reception signal intensity optimization |
| CN110868752A (en) * | 2018-08-28 | 2020-03-06 | 阿里巴巴集团控股有限公司 | Terminal positioning method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105828435A (en) * | 2016-05-30 | 2016-08-03 | 天津大学 | Distance correction weighted centroid localization method based on reception signal intensity optimization |
| CN110868752A (en) * | 2018-08-28 | 2020-03-06 | 阿里巴巴集团控股有限公司 | Terminal positioning method and device |
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