CN115022960A - Position identification method and device and processor readable storage medium - Google Patents

Position identification method and device and processor readable storage medium Download PDF

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Publication number
CN115022960A
CN115022960A CN202110195125.4A CN202110195125A CN115022960A CN 115022960 A CN115022960 A CN 115022960A CN 202110195125 A CN202110195125 A CN 202110195125A CN 115022960 A CN115022960 A CN 115022960A
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base station
terminal
distance
target
determining
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任瑞香
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • 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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Abstract

The invention provides a position identification method, a position identification device and a processor readable storage medium. The method comprises the following steps: acquiring a first distance between a first base station in the M base stations and a terminal to be positioned and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned; respectively acquiring a first differential value of each second distance and the first distance; determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value; wherein M is greater than or equal to 3. According to the embodiment of the application, on the basis of the existing protocol, the measurement amount is not required to be increased, whether the terminal to be positioned is positioned in the area with larger positioning error of the base station or not can be accurately identified before positioning calculation, so that parameter selection and algorithm processing are conveniently carried out on the positioning algorithm aiming at the area with larger positioning error, and the accuracy of positioning the terminal is further improved.

Description

Position identification method and device and processor readable storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for identifying a location, and a storage medium readable by a processor.
Background
Indoor positioning algorithms are generally based on multilaterationAfter the distance between the terminal and each base station is obtained by performing measurement, positioning needs to be performed through an algorithm, for example: combining a Chan algorithm with a Taylor series expansion algorithm, performing multiple Chan algorithm calculations on monitoring nodes around a base station, averaging results obtained multiple times, and providing the results to a Taylor algorithm as an initial value; or, all base stations which can participate in positioning the terminal are processed
Figure BDA0002944453020000011
And performing secondary Chan algorithm positioning to obtain an initial positioning result, and selecting 3 base stations closest to the initial positioning result for positioning.
In the existing algorithm, when a terminal is located, a base station closest to the terminal is used for calculation, and when the terminal is close to the base station, a metric value of information may be poor, so that a location result error of the terminal is large, and therefore, an influence of a relative position of the terminal and the base station on location needs to be considered.
Disclosure of Invention
The invention provides a position identification method, a position identification device and a processor readable storage medium, which are used for solving the problem that the relative positions of a terminal and a base station which possibly cause large positioning result errors cannot be identified.
An embodiment of the present invention provides a position identification method, including:
acquiring a first distance between a first base station in the M base stations and a terminal to be positioned and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned;
respectively acquiring a first differential value of each second distance and the first distance;
determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value;
wherein M is greater than or equal to 3.
Optionally, the determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value includes:
and under the condition that the first differential value meets a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station.
Optionally, the determining, according to the first target base station corresponding to the minimum value in the first differential value, the position of the terminal to be positioned includes:
under the condition that the first differential value does not meet a first condition, acquiring a third distance between the first target base station and the terminal to be positioned and a fourth distance between at least two base stations except the first target base station in the M base stations and the terminal to be positioned;
respectively acquiring a second differential value of each fourth distance and the third distance;
and determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value.
Optionally, the first condition comprises: the first differential values of the first distance and each of the second distances are all greater than zero.
Optionally, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station when the first differential value satisfies a first condition, where the determining includes:
calculating a first base station distance between the first target base station and the first base station according to the coordinate of the first target base station and the coordinate of the first base station;
and determining that the terminal to be positioned is positioned in the target area of the first base station under the condition that the minimum value in the first differential value and the first base station distance meet a second condition.
Optionally, the second condition comprises: the ratio of the minimum value in the first differential value to the first base station distance is greater than or equal to a first threshold value;
the first threshold is greater than 0 and less than 1.
Optionally, determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value includes:
calculating a second base station distance between the second target base station and the first target base station according to the coordinates of the second target base station and the coordinates of the first target base station;
and under the condition that the minimum value in the second differential value and the second base station distance meet a third condition, determining that the terminal to be positioned is located in the target area of the first target base station.
Optionally, the third condition comprises: the ratio of the minimum value in the second differential value to the second base station distance is greater than or equal to a second threshold value;
the second threshold is greater than 0 and less than 1.
Optionally, before obtaining a first distance between a first base station of the M base stations and a terminal to be positioned, and a second distance between at least two base stations of the M base stations except the first base station and the terminal to be positioned, the method further includes:
determining the M base stations according to the target measurement quantity;
the target measurement quantity includes: one of Reference Signal Received Power (RSRP) and Signal Noise Ratio (SNR).
Optionally, the determining the M base stations according to the target measurement quantity includes:
determining the M base stations according to the sequence of the values of the target measurement quantity of each base station; or alternatively
And determining the M base stations according to the relation between the target measurement quantity of each base station and a target threshold value.
An embodiment of the present invention provides a position recognition apparatus, including: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring a first distance between a first base station in the M base stations and a terminal to be positioned and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned;
respectively obtaining a first differential value of each second distance and the first distance;
determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value;
wherein M is greater than or equal to 3.
Optionally, the determining, according to the first target base station corresponding to the minimum value in the first differential value, the position of the terminal to be positioned specifically includes:
and under the condition that the first differential value meets a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station.
Optionally, the determining, according to the first target base station corresponding to the minimum value in the first differential value, the position of the terminal to be positioned specifically includes:
under the condition that the first differential value does not meet a first condition, acquiring a third distance between the first target base station and the terminal to be positioned and a fourth distance between at least two base stations except the first target base station in the M base stations and the terminal to be positioned;
respectively acquiring a second differential value of each fourth distance and the third distance;
and determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value.
Optionally, the first condition comprises: the first differential values of the first distance and each of the second distances are all greater than zero.
Optionally, when the first differential value meets a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station, specifically including:
calculating a first base station distance between the first target base station and the first base station according to the coordinate of the first target base station and the coordinate of the first base station;
and determining that the terminal to be positioned is positioned in the target area of the first base station under the condition that the minimum value in the first differential value and the first base station distance meet a second condition.
Optionally, the second condition comprises: the ratio of the minimum value in the first differential value to the first base station distance is greater than or equal to a first threshold value;
the first threshold is greater than 0 and less than 1.
Optionally, the determining, according to the information of the second target base station corresponding to the minimum value in the second difference value, the position of the terminal to be positioned specifically includes:
calculating a second base station distance between the second target base station and the first target base station according to the coordinates of the second target base station and the coordinates of the first target base station;
and under the condition that the minimum value in the second differential value and the second base station distance meet a third condition, determining that the terminal to be positioned is located in the target area of the first target base station.
Optionally, the third condition comprises: the ratio of the minimum value in the second differential value to the second base station distance is greater than or equal to a second threshold;
the second threshold is greater than 0 and less than 1.
Optionally, before obtaining a first distance between a first base station of the M base stations and a terminal to be positioned, and a second distance between at least two base stations of the M base stations except the first base station and the terminal to be positioned, the processor is further configured to:
determining the M base stations according to the target measurement quantity;
the target measurement quantity includes: one of reference signal received power, RSRP, signal to noise ratio, SNR.
Optionally, the determining the M base stations according to the target measurement quantity specifically includes:
determining the M base stations according to the sequence of the values of the target measurement quantity of each base station; or
And determining the M base stations according to the relation between the target measurement quantity of each base station and a target threshold value.
An embodiment of the present invention provides a position recognition apparatus, including:
the first obtaining unit is used for obtaining a first distance between a first base station in the M base stations and a terminal to be positioned and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned;
a second obtaining unit, configured to obtain a first difference value between each of the second distances and the first distance, respectively;
a position identification unit, configured to determine a position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first difference value;
wherein M is greater than or equal to 3.
Embodiments of the present invention provide a processor-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described position identification method.
The technical scheme of the invention has the beneficial effects that:
according to the embodiment of the application, the minimum value of the differential values is determined according to the differential values of the distances between each base station and the terminal to be positioned in the base stations participating in positioning, and the position of the terminal to be positioned is determined according to the first target base station corresponding to the minimum value. According to the embodiment, on the basis of the existing protocol, the measurement quantity is not required to be increased, and whether the terminal to be positioned is positioned in the area with the larger positioning error of the base station or not is accurately identified before positioning calculation, so that parameter selection and algorithm processing are conveniently carried out on the positioning algorithm of the area with the larger positioning error, and the accuracy of positioning the terminal is further improved.
Drawings
FIG. 1 is a flow chart of a location identification method according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a location identification method according to an embodiment of the present invention;
FIG. 3 is a third flowchart illustrating a location identification method according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a position recognition apparatus according to an embodiment of the present invention;
fig. 5 is a second schematic structural diagram of a position recognition device according to an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of the process, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In addition, the terms "system" and "network" are often used interchangeably herein.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
In the embodiment of the present invention, the access network may be an access network including a Macro Base Station (Macro Base Station), a micro Base Station (Pico Base Station), a Node B (3G mobile Station), an enhanced Base Station (eNB), a Home enhanced Base Station (Femto eNB or Home eNode B or Home eNB or HeNB), a relay Station, an access point, a Remote Radio Unit (RRU), a Remote Radio Head (RRH), and the like. The user terminal may be a mobile phone (or handset), or other device capable of sending or receiving wireless signals, including user Equipment, a Personal Digital Assistant (PDA), a wireless modem, a wireless communicator, a handheld device, a laptop computer, a cordless phone, a Wireless Local Loop (WLL) station, a CPE (Customer Premise Equipment) or a mobile smart hotspot capable of converting mobile signals into WiFi signals, a smart appliance, or other devices capable of autonomously communicating with a mobile communication network without human operation, and so on.
Specifically, the embodiment of the present invention provides a position identification method, so as to solve the problem that the relative positions of a terminal and a base station, which may cause a large error in the positioning result, cannot be identified.
As shown in fig. 1, an embodiment of the present invention provides a location identification method, which specifically includes the following steps:
step 101, acquiring a first distance between a first base station in M base stations and a terminal to be positioned, and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned; wherein M is greater than or equal to 3.
The M base stations are all base stations participating in positioning, and the first base station is an initial reference base station, which may be a base station closest to the terminal to be positioned. A first distance between the first base station and the terminal to be positioned, and a second distance between other base stations except the first base station and the terminal to be positioned may be obtained according to a measurement quantity between the base station and the terminal to be positioned, where the measurement quantity is, for example: TOA, TDOA and AOA, wherein the measurement quantity is used for representing the distance between a base station and the terminal to be positioned.
And if M is greater than or equal to 3, at least two base stations except the first base station are used, and a second distance between each base station and the terminal to be positioned is obtained respectively, so that at least two second distances can be obtained.
And 102, respectively obtaining a first differential value of each second distance and the first distance.
And respectively calculating the difference value of each second distance and the first distance for the at least two second distances. The first differential value is a difference between the second distance and the first distance, for example: the second distance is r i I ═ 2,3, …, M; the first distance is r 1 Then the first differential value is r i -r 1 。
Wherein, the first and the second end of the pipe are connected with each other,
Figure BDA0002944453020000071
the coordinates of the terminal to be positioned are (X, y), and the coordinates of the base station are (X) i ,Y i )，2≤i≤M。
If the second distance is at least two, the number of the first differential values is the same as the number of the second distances, and is also at least two.
103, determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value.
And determining a minimum value in the at least two first differential values, and determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value. The determining of the position of the terminal to be positioned may be determining whether the terminal to be positioned is located in a region with a larger positioning error of the base station, for example, a near field region of the base station, that is, by determining whether the terminal to be positioned is located in the near field region or a far field region of the base station, a special processing of the algorithm is performed according to a distance between the terminal to be positioned and the base station, so as to avoid the positioning error caused by a closer distance between the base station and the terminal. The near field region of the base station may be a region in which a distance (or a parameter representing the distance) from the base station is within a preset range within a communication range of the base station, and the preset range may be set according to communication parameters of the base station.
According to the embodiment of the application, the minimum value of the differential values is determined according to the differential values of the distances between each base station and the terminal to be positioned in the base stations participating in positioning, and the position of the terminal to be positioned is determined according to the first target base station corresponding to the minimum value. According to the embodiment, on the basis of the existing protocol, the measurement quantity is not required to be increased, and whether the terminal to be positioned is positioned in the area with the larger positioning error of the base station or not is accurately identified before positioning calculation, so that parameter selection and algorithm processing are conveniently carried out on the positioning algorithm of the area with the larger positioning error, and the accuracy of positioning the terminal is further improved.
Optionally, before determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value, the method further includes: and judging whether the first differential value meets a first condition or not. Specifically, the first condition includes: the first differential values of the first distance and each of the second distances are all greater than zero. Namely, whether the first differential values are all larger than zero is judged, and the position of the terminal to be positioned is determined according to the first target base station according to the condition that whether the first differential values are all larger than zero.
As an optional embodiment, when the first difference value satisfies a first condition, the determining, according to the first target base station corresponding to the minimum value in the first difference value, the position of the terminal to be positioned may include:
and under the condition that the first differential value meets a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station.
In this embodiment, when all the first differential values are greater than zero, whether the terminal to be positioned is located in the near field area of the first base station is determined according to the coordinate of the first base station and the coordinate of the first target base station. The first base station is a base station closest to the terminal to be positioned, and the first target base station is a base station next closest to the terminal to be positioned, that is, the position of the terminal to be positioned is determined according to the coordinates of two base stations closest to the terminal to be positioned in the embodiment.
Further, when the first differential value satisfies a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station, including: calculating a first base station distance between the first target base station and the first base station according to the coordinate of the first target base station and the coordinate of the first base station; and determining that the terminal to be positioned is positioned in the target area of the first base station under the condition that the minimum value in the first differential value and the first base station distance meet a second condition.
Wherein the second condition may include: the ratio of the minimum value in the first differential value to the first base station distance is greater than or equal to a first threshold value; the first threshold is greater than 0 and less than 1.
In this embodiment, when all the first differential values are greater than zero, a first base station distance between two base stations is calculated according to the coordinate of the first base station and the coordinate of the first target base station, and whether the terminal to be positioned is located in the target area of the first base station is determined according to a ratio of a minimum value in the first differential values to the first base station distance. The target area of the first base station is an area where the positioning error of the first base station is large, for example, a near field area of the first base station. The first threshold value may be set according to conditions such as a positioning algorithm and an application scenario.
Taking the target area of the first base station as the near field area of the first base station, and taking as an example that the first differential value satisfies the first condition, as shown in fig. 2, the implementation process of the position identifying method of the present application is described below:
step 201: calculating a first base station of the M base stations (Numbered 1) to a terminal to be positioned, and a first differential value d of a second distance from other base stations except the first base station to the terminal to be positioned in the M base stations i1 ，i＝2,…M；
Step 202: judging whether all the first differential values are larger than zero; if all the identification variables greater than zero are marked as AllPosFlag, if all the first differential values are greater than zero, making AllPosFlag equal to 1, and entering step 203 and step 204;
step 203: finding out the first difference value d i1 Minimum value of d sMin And recording the minimum value d sMin The corresponding base station index number is marked as i sMin ；
Step 204: base station i corresponding to the minimum value sMin And base station coordinates numbered 1, calculating the distance between the two base stations:
Figure BDA0002944453020000091
step 205: will be provided with
Figure BDA0002944453020000092
And a threshold value TH (0)<TH<1) Comparing, and judging whether R is greater than or equal to TH;
step 206: if it is
Figure BDA0002944453020000101
Then it can be determined that the terminal to be positioned is located in the near field area of the first base station;
step 207: if it is
Figure BDA0002944453020000102
Then it can be determined that the terminal to be positioned is in the far field area of the first base station.
Therefore, after the terminal to be positioned is located in a far field or a near field area of the first base station, according to special processing of a near-far degree algorithm, for example, information of the first base station is removed when the terminal to be positioned is positioned, and positioning is performed by using information of other base stations except the first base station in the M base stations, so that positioning errors caused by the fact that the base stations are close to the terminal can be avoided, and the accuracy of positioning the terminal is improved.
It should be noted that, when determining the position of the terminal to be positioned, the second condition for determining the minimum value in the first difference value and the first base station distance may be as follows: the ratio of the minimum value in the first difference value to the first base station distance is greater than or equal to a first threshold, or may be set as another judgment condition according to the algorithm requirement.
As another optional embodiment, when the first difference value does not satisfy the first condition, the determining, according to the first target base station corresponding to the minimum value in the first difference value, the position of the terminal to be positioned may include:
under the condition that the first differential value does not meet a first condition, acquiring a third distance between the first target base station and the terminal to be positioned and a fourth distance between at least two base stations except the first target base station in the M base stations and the terminal to be positioned;
respectively obtaining a second differential value of each fourth distance and the third distance; and determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value.
In this embodiment, when at least part of the first differential values is less than or equal to zero, the first target base station is used as a new reference base station, and a third distance between the first target base station and the terminal to be positioned and a fourth distance between the other base stations except the first target base station among the M base stations and the terminal to be positioned are obtained, where as M is greater than or equal to 3, at least 2 base stations except the first target base station may obtain at least two fourth distances. And respectively calculating second difference values of each of the at least two fourth distances and the third distance, wherein the number of the second difference values is the same as that of the fourth distances, and is at least two. And determining the position of the terminal to be positioned according to the second target base station corresponding to the minimum value in the at least two second differential values.
If at least part of the first differential values is less than or equal to zero, the minimum value in the first differential values is less than or equal to zero, the first base station is not the base station closest to the terminal to be positioned, the first target base station is determined as the base station closest to the terminal to be positioned and serves as a new reference base station, the second closest target base station is determined, and whether the terminal to be positioned is located in the near field area of the first target base station or not can be determined according to the information of the second target base station, that is, the position of the terminal to be positioned is determined according to the coordinates of the two base stations closest to the terminal to be positioned in the embodiment.
Further, determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second difference value may include:
calculating a second base station distance between the second target base station and the first target base station according to the coordinates of the second target base station and the coordinates of the first target base station; and determining that the terminal to be positioned is positioned in the target area of the first target base station under the condition that the minimum value in the second differential value and the second base station distance meet a third condition.
Wherein the third condition may include: the ratio of the minimum value in the second differential value to the second base station distance is greater than or equal to a second threshold; the second threshold is greater than 0 and less than 1.
In this embodiment, when at least a part of the first differential value is less than or equal to zero, a second base station distance between the two base stations is calculated according to the coordinate of the first target base station and the coordinate of the second target base station, and whether the terminal to be positioned is located in the target area of the first target base station is determined according to a ratio of a minimum value in the second differential value to the second base station distance. The target area of the first target base station is an area where the positioning error of the first target base station is large, for example, a near field area of the first target base station. The second threshold may be set according to a positioning algorithm, an application scenario, and the like.
Taking the target area of the first target base station as the near field area of the first target base station, and taking the first difference value not meeting the first condition as an example, as shown in fig. 3, the implementation process of the position identification method of the present application is described below:
step 301: calculating a first difference value d between a first distance from a first base station (numbered 1) in M base stations participating in positioning to the terminal to be positioned and a second distance from other base stations except the first base station in the M base stations to the terminal to be positioned i1 ，i＝2,…M；
Step 302: judging whether all the first differential values are larger than zero; if all the identification variables larger than zero are marked as AllPosFlag, if at least part of the first differential values are smaller than or equal to zero, making the AllPosFlag equal to 0;
step 303: finding out the first difference value d i1 Minimum value of d sMin And recording the minimum value d sMin The corresponding index number of the first target base station is marked as i sMin ；
Step 304: base station corresponding to minimum value (number i) sMin Base station of (2) as a new reference base station, calculating a second differential value
Figure BDA0002944453020000121
Where i is 1,2, …, M, i ≠ i sMin ；
Figure BDA0002944453020000122
Figure BDA0002944453020000123
Step 305: determining a second difference value
Figure BDA0002944453020000124
Minimum value of (d) sMin ') and the index number i of the second target base station corresponding to the minimum value sMin ′；
Wherein, if i sMin ′>i sMin Then i is sMin ′＝i sMin ' +1, for example: m is 5, divided by the reference base station (the first target base station i) sMin ) The total number of outer base stations is 4, i sMin ' is the 3 rd one, if i sMin Is 2, then i sMin ′ Should be 4.
Step 306: according to the second target base station (base station number i) sMin ') and a first target base station (numbered i) sMin Of (d) calculating the distance of two base stations:
Figure BDA0002944453020000125
step 307: will be provided with
Figure BDA0002944453020000126
And a threshold value TH' (0)<TH′<1) Comparing, and judging whether R is greater than or equal to TH';
step 308: if it is
Figure BDA0002944453020000127
Then, it can be determined that the terminal to be positioned is located in the near field area of the first target base station;
step 309: if it is
Figure BDA0002944453020000128
Then it can be determined that the terminal to be positioned is located in the far field area of the first target base station.
Therefore, after the terminal to be positioned is located in a far field or a near field area of a first target base station, according to special processing of a distance degree algorithm, for example, information of the first target base station is removed when the terminal to be positioned is positioned, positioning is performed by using information of other base stations except the first target base station in the M base stations, and therefore positioning errors caused by the fact that the base stations are close to the terminal and the terminal is located in an area with a large positioning error of the base station can be avoided, and accuracy of positioning the terminal is improved.
It should be noted that, when determining the position of the terminal to be positioned, the third condition for determining the minimum value in the second difference value and the second base station distance may be as follows: the ratio of the minimum value in the second difference value to the second base station distance is greater than or equal to a second threshold, or may be set as another judgment condition according to the algorithm requirement.
When the position of the terminal to be positioned is identified, a ratio method can be adopted, and other methods can also be adopted for assistance. For the near field area of the base station, an area with a larger positioning error matched with a positioning algorithm is mainly selected. After the position of the terminal to be positioned is positioned and identified, a specific algorithm can be adopted for positioning processing of a near field of the base station or other identifiable peripheral areas, the initial position calculation can be carried out by the positioning algorithm through algorithms such as Chan, and the like, and algorithm enhancement processing of the positioning calculation can also be carried out through other algorithms.
Optionally, before obtaining a first distance between a first base station of the M base stations and a terminal to be positioned, and a second distance between at least two base stations of the M base stations except the first base station and the terminal to be positioned, the method further includes: determining the M base stations according to the target measurement quantity; the target measurement quantity includes: one of reference signal received power, RSRP, signal to noise ratio, SNR.
The determining the M base stations according to the target measurement quantity may include: determining the M base stations according to the sequence of the values of the target measurement quantity of each base station; or determining the M base stations according to the relation between the target measurement quantity of each base station and a target threshold value.
In this embodiment, the M base stations participating in positioning may be base stations screened in advance according to a target measurement quantity, where the target measurement quantity may be one of RSRP and SNR, or may be another measurement quantity. Assuming that a terminal to be positioned is in a network with the number of base stations N which can be used for positioning, the terminal firstly selects some reliable base stations for positioning according to the estimated value of RSRP or SNR. In the selection, the RSRP or SNR from the N base stations to the terminal may be ranked or determined according to whether a certain threshold is reached.
It should be noted that, when selecting a base station for positioning, the measurement quantity that can be used may be RSRP, SNR, or another measurement quantity. When selecting the base station for positioning, a sorting method may be adopted, or a method determined according to a threshold may be adopted.
After the position of the terminal to be positioned is identified, the algorithm for positioning the terminal to be positioned can be a TOA method, a TDOA method, an AOA method, an RSSI method and the like. Taking TDOA as an example, suppose that M base stations in a positioning system position the terminal to be positioned, the position coordinates of the terminal to be positioned are (X, y), and the position coordinates of the base stations are (X) i ,Y i ) I is more than or equal to 1 and less than or equal to M, wherein, the signals of the M-1 base stations reaching the terminal to be positioned and the serving base station BS 1 The time difference of incoming waves between signals (namely the first base station) reaching the terminal to be positioned is t i I — 1,2,3, …, M, which can be calculated by TDOA principles:
Figure BDA0002944453020000141
let r be i -r 1 ＝r i1 ，k i ＝X i 2 +Y i 2 Linearizing the equation, one can obtain:
r i1 2 +2·r i1 r 1 ＝-2·(Y i -Y 1 )·y+k i -k 1 ，i＝2,3,…,M； (1)
wherein r is i Is a base station (X) i ,Y i ) Distance from terminal (x, y) to be positioned, r 1 Serving base station BS 1 And c is the speed of light.
For the solution of the above equation, an LS algorithm, a Chan algorithm or a Taylor series expansion algorithm can be adopted, wherein the LS algorithm is to eliminate r from M-1 formulas in the above formula (1) 1 Term, establish h ═ Z · V T ·(V·V T ) -1 Is a relational expression ofSolving is carried out, h ═ x, y]. The Taylor series expansion algorithm is based on an initial position (X) 0 ,Y 0 ) Calculating r i And then calculate h t And G t And calculating by combining the covariance matrix Q
Figure BDA0002944453020000142
According to (X) 0 +Δx,Y 0 + Δ y) continues the calculation. The Chan algorithm is to assume P ═ X, Y, r] T ，h c ＝G c P+ε c Wherein, in the step (A),
Figure BDA0002944453020000143
Figure BDA0002944453020000144
P＝(G c T Q -1 G c ) -1 G c T Q -1 h c
wherein Q is a covariance matrix of TDOA measurement error, and is a substitution error epsilon c The covariance matrix of (2).
In the embodiment, in the process of position location calculation, in some special areas (areas with large location errors of the base station, such as near field areas of the base station), the terminal to be located is subjected to position identification, and then different areas are subjected to different positioning algorithm processing, so as to ensure the performance of the positioning algorithm when the corresponding terminal is located, for example: when the terminal to be positioned is positioned in a target area (such as a near field area) of the base station, removing the base station closest to the terminal to be positioned, and performing positioning calculation by using the rest other base stations. The method and the device do not need to increase other measurement quantities on the basis of the existing protocol; the position judgment is carried out through the differential measurement quantity, so that the position with larger positioning error of the base station can be more accurately identified; the method does not depend on information conditions such as absolute distance of a positioning scene and the like, and can be generally applied; the threshold value can be adapted according to different algorithm schemes and different application scenarios. The method and the device have the advantages that the position of the region with the ubiquitous problem of the performance of the positioning algorithm is identified, the performance of the existing positioning algorithm can be improved, the difficulty of seeking the optimal positioning algorithm is solved, and the accuracy of the positioning algorithm can be effectively improved under the condition that the calculation complexity is not obviously increased.
According to the embodiment of the application, the minimum value of the difference values is determined according to the difference value of the distance between each base station in the base stations participating in positioning and the terminal to be positioned, and the position of the terminal to be positioned is determined according to the first target base station corresponding to the minimum value. According to the embodiment, on the basis of the existing protocol, the measurement quantity is not required to be increased, and whether the terminal to be positioned is positioned in the area with the larger positioning error of the base station or not is accurately identified before positioning calculation, so that parameter selection and algorithm processing are conveniently carried out on the positioning algorithm of the area with the larger positioning error, and the accuracy of positioning the terminal is further improved.
The above embodiments are described with respect to the position recognition method of the present invention, and the following embodiments will further describe the corresponding apparatuses with reference to the accompanying drawings.
Specifically, as shown in fig. 4, the position recognition apparatus 400 according to the embodiment of the present invention includes:
a first obtaining unit 410, configured to obtain a first distance between a first base station of the M base stations and a terminal to be positioned, and a second distance between at least two base stations of the M base stations except the first base station and the terminal to be positioned;
a second obtaining unit 420, configured to obtain a first difference value between each of the second distances and the first distance, respectively;
a position identifying unit 430, configured to determine a position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value;
wherein M is greater than or equal to 3.
Optionally, the position identifying unit 430 includes:
and the first determining subunit is configured to determine, according to the coordinate of the first target base station and the coordinate of the first base station, the position of the terminal to be positioned when the first differential value satisfies a first condition.
Optionally, the location identifying unit 430 includes:
a first obtaining subunit, configured to obtain, when the first difference value does not satisfy a first condition, a third distance between the first target base station and the terminal to be positioned, and a fourth distance between at least two base stations, excluding the first target base station, of the M base stations and the terminal to be positioned;
a second obtaining subunit, configured to obtain a second difference value between each of the fourth distances and the third distance, respectively;
and the second determining subunit is configured to determine the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second difference value.
Optionally, the first condition comprises: the first differential values of the first distance and each of the second distances are all greater than zero.
Optionally, the first determining subunit is specifically configured to:
calculating a first base station distance between the first target base station and the first base station according to the coordinate of the first target base station and the coordinate of the first base station;
and under the condition that the minimum value in the first differential value and the first base station distance meet a second condition, determining that the terminal to be positioned is located in the target area of the first base station.
Optionally, the second condition comprises: the ratio of the minimum value in the first differential value to the first base station distance is greater than or equal to a first threshold value;
the first threshold is greater than 0 and less than 1.
Optionally, the second determining subunit is specifically configured to:
calculating a second base station distance between the second target base station and the first target base station according to the coordinates of the second target base station and the coordinates of the first target base station;
and under the condition that the minimum value in the second differential value and the second base station distance meet a third condition, determining that the terminal to be positioned is located in the target area of the first target base station.
Optionally, the third condition comprises: the ratio of the minimum value in the second differential value to the second base station distance is greater than or equal to a second threshold value;
the second threshold is greater than 0 and less than 1.
Optionally, the apparatus further comprises:
a determining unit, configured to determine the M base stations according to a target measurement amount;
the target measurement quantity includes: one of reference signal received power, RSRP, signal to noise ratio, SNR.
Optionally, the determining unit is specifically configured to:
determining the M base stations according to the sequence of the values of the target measurement quantity of each base station; or alternatively
And determining the M base stations according to the relation between the target measurement quantity of each base station and a target threshold value.
According to the embodiment of the application, the minimum value of the differential values is determined according to the differential values of the distances between each base station and the terminal to be positioned in the base stations participating in positioning, and the position of the terminal to be positioned is determined according to the first target base station corresponding to the minimum value. According to the embodiment, on the basis of the existing protocol, the measurement quantity is not required to be increased, and whether the terminal to be positioned is positioned in the area with the larger positioning error of the base station or not is accurately identified before positioning calculation, so that parameter selection and algorithm processing are conveniently carried out on the positioning algorithm of the area with the larger positioning error, and the accuracy of positioning the terminal is further improved.
It should be noted that, the apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.
It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
As shown in fig. 5, the embodiment of the present invention further provides a position identifying apparatus, which includes a transceiver 504, a memory 503, a processor 501, and a computer program stored in the memory 503 and running on the processor.
A memory 503 for storing a computer program; a transceiver 504 connected to the bus interface 502 for transceiving data under the control of the processor 501; a processor 501 for reading the computer program in the memory 503 and performing the following operations:
acquiring a first distance between a first base station in the M base stations and a terminal to be positioned and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned;
respectively acquiring a first differential value of each second distance and the first distance;
determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value;
wherein M is greater than or equal to 3.
Optionally, the determining, according to the first target base station corresponding to the minimum value in the first differential value, the position of the terminal to be positioned specifically includes:
and under the condition that the first differential value meets a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station.
Optionally, the determining, according to the first target base station corresponding to the minimum value in the first differential value, the position of the terminal to be positioned specifically includes:
under the condition that the first differential value does not meet a first condition, acquiring a third distance between the first target base station and the terminal to be positioned and a fourth distance between at least two base stations except the first target base station in the M base stations and the terminal to be positioned;
respectively obtaining a second differential value of each fourth distance and the third distance;
and determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value.
Optionally, the first condition comprises: the first differential values of the first distance and each of the second distances are all greater than zero.
Optionally, when the first differential value meets a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station, specifically including:
calculating a first base station distance between the first target base station and the first base station according to the coordinate of the first target base station and the coordinate of the first base station;
and under the condition that the minimum value in the first differential value and the first base station distance meet a second condition, determining that the terminal to be positioned is located in the target area of the first base station.
Optionally, the second condition comprises: the ratio of the minimum value in the first differential value to the first base station distance is greater than or equal to a first threshold value;
the first threshold is greater than 0 and less than 1.
Optionally, the determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value specifically includes:
calculating a second base station distance between the second target base station and the first target base station according to the coordinates of the second target base station and the coordinates of the first target base station;
and under the condition that the minimum value in the second differential value and the second base station distance meet a third condition, determining that the terminal to be positioned is located in the target area of the first target base station.
Optionally, the third condition comprises: the ratio of the minimum value in the second differential value to the second base station distance is greater than or equal to a second threshold value;
the second threshold is greater than 0 and less than 1.
Optionally, before obtaining a first distance between a first base station of the M base stations and a terminal to be positioned, and a second distance between at least two base stations of the M base stations except the first base station and the terminal to be positioned, the processor is further configured to:
determining the M base stations according to the target measurement quantity;
the target measurement quantity includes: reference signal received power, RSRP, signal to noise ratio, SNR.
Optionally, the determining the M base stations according to the target measurement quantity specifically includes:
determining the M base stations according to the sequence of the values of the target measurement quantity of each base station; or
And determining the M base stations according to the relation between the target measurement quantity of each base station and a target threshold value.
According to the embodiment of the application, the minimum value of the differential values is determined according to the differential values of the distances between each base station and the terminal to be positioned in the base stations participating in positioning, and the position of the terminal to be positioned is determined according to the first target base station corresponding to the minimum value. According to the embodiment, on the basis of the existing protocol, the measurement quantity is not required to be increased, whether the terminal to be positioned is positioned in the area with the larger positioning error of the base station or not is accurately identified before positioning calculation, so that parameter selection and algorithm processing are conveniently carried out on the positioning algorithm of the area with the larger positioning error, and the accuracy of positioning the terminal is improved.
Where in fig. 5 the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 501 and various circuits of memory represented by memory 503, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 504 may be a plurality of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 501 is responsible for managing the bus architecture and general processing, and the memory 503 may store data used by the processor 500 in performing operations.
The processor 501 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.
It should be noted that, the position identification apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the embodiment of the position identification method, and can achieve the same technical effect, and details of the same parts and beneficial effects as those of the embodiment of the method are not described herein again.
In addition, the embodiment of the present invention further provides a storage medium readable by a processor, on which a computer program is stored, wherein the program, when executed by the processor, implements the steps in the above position identification method. And the same technical effect can be achieved, and in order to avoid repetition, the description is omitted here. The readable storage medium can be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.
Furthermore, it should be noted that in the apparatus and method of the present invention, it is obvious that each component or each step may be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processor, storage medium, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (22)

1. A method of location identification, comprising:
acquiring a first distance between a first base station in the M base stations and a terminal to be positioned and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned;
respectively obtaining a first differential value of each second distance and the first distance;
determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value;
wherein M is greater than or equal to 3.
2. The method of claim 1, wherein the determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value comprises:
and under the condition that the first differential value meets a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station.
3. The method of claim 1, wherein the determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value comprises:
under the condition that the first differential value does not meet a first condition, acquiring a third distance between the first target base station and the terminal to be positioned and a fourth distance between at least two base stations except the first target base station in the M base stations and the terminal to be positioned;
respectively acquiring a second differential value of each fourth distance and the third distance;
and determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value.
4. The method of claim 2 or 3, wherein the first condition comprises: the first differential values of the first distance and each of the second distances are all greater than zero.
5. The method according to claim 2, wherein, in a case where the first differential value satisfies a first condition, determining the position of the terminal to be positioned according to the coordinates of the first target base station and the coordinates of the first base station comprises:
calculating a first base station distance between the first target base station and the first base station according to the coordinate of the first target base station and the coordinate of the first base station;
and under the condition that the minimum value in the first differential value and the first base station distance meet a second condition, determining that the terminal to be positioned is located in the target area of the first base station.
6. The method of claim 5, wherein the second condition comprises: the ratio of the minimum value in the first differential value to the first base station distance is greater than or equal to a first threshold value;
the first threshold is greater than 0 and less than 1.
7. The method of claim 3, wherein determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value comprises:
calculating a second base station distance between the second target base station and the first target base station according to the coordinates of the second target base station and the coordinates of the first target base station;
and under the condition that the minimum value in the second differential value and the second base station distance meet a third condition, determining that the terminal to be positioned is located in the target area of the first target base station.
8. The method of claim 7, wherein the third condition comprises: the ratio of the minimum value in the second differential value to the second base station distance is greater than or equal to a second threshold value;
the second threshold is greater than 0 and less than 1.
9. The method of claim 1, wherein before obtaining a first distance between a first base station of the M base stations and a terminal to be positioned and a second distance between at least two base stations of the M base stations except the first base station and the terminal to be positioned, the method further comprises:
determining the M base stations according to the target measurement quantity;
the target measurement quantity includes: reference signal received power, RSRP, signal to noise ratio, SNR.
10. The method of claim 9, wherein the determining the M base stations according to the target measurement comprises:
determining the M base stations according to the sequence of the values of the target measurement quantity of each base station; or
And determining the M base stations according to the relation between the target measurement quantity of each base station and a target threshold value.
11. A position identifying apparatus comprising: a transceiver, a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of:
acquiring a first distance between a first base station in the M base stations and a terminal to be positioned and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned;
respectively acquiring a first differential value of each second distance and the first distance;
determining the position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first differential value;
wherein M is greater than or equal to 3.
12. The apparatus according to claim 11, wherein the determining, according to the first target base station corresponding to the minimum value in the first differential value, the position of the terminal to be positioned specifically includes:
and under the condition that the first differential value meets a first condition, determining the position of the terminal to be positioned according to the coordinate of the first target base station and the coordinate of the first base station.
13. The apparatus according to claim 11, wherein the determining, according to the first target base station corresponding to the minimum value in the first differential value, the position of the terminal to be positioned specifically includes:
under the condition that the first differential value does not meet a first condition, acquiring a third distance between the first target base station and the terminal to be positioned and a fourth distance between at least two base stations except the first target base station in the M base stations and the terminal to be positioned;
respectively obtaining a second differential value of each fourth distance and the third distance;
and determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value.
14. The apparatus of claim 12 or 13, wherein the first condition comprises: the first differential values of the first distance and each of the second distances are all greater than zero.
15. The apparatus according to claim 12, wherein, when the first differential value satisfies a first condition, determining the position of the terminal to be positioned according to the coordinates of the first target base station and the coordinates of the first base station specifically includes:
calculating a first base station distance between the first target base station and the first base station according to the coordinate of the first target base station and the coordinate of the first base station;
and under the condition that the minimum value in the first differential value and the first base station distance meet a second condition, determining that the terminal to be positioned is located in the target area of the first base station.
16. The apparatus of claim 15, wherein the second condition comprises: the ratio of the minimum value in the first differential value to the first base station distance is greater than or equal to a first threshold value;
the first threshold is greater than 0 and less than 1.
17. The apparatus according to claim 13, wherein the determining the position of the terminal to be positioned according to the information of the second target base station corresponding to the minimum value in the second differential value specifically includes:
calculating a second base station distance between the second target base station and the first target base station according to the coordinates of the second target base station and the coordinates of the first target base station;
and under the condition that the minimum value in the second differential value and the second base station distance meet a third condition, determining that the terminal to be positioned is located in the target area of the first target base station.
18. The apparatus of claim 17, wherein the third condition comprises: the ratio of the minimum value in the second differential value to the second base station distance is greater than or equal to a second threshold;
the second threshold is greater than 0 and less than 1.
19. The apparatus of claim 11, wherein before obtaining a first distance between a first base station of the M base stations and a terminal to be positioned, and a second distance between at least two base stations of the M base stations other than the first base station and the terminal to be positioned, the processor is further configured to:
determining the M base stations according to the target measurement quantity;
the target measurement quantity includes: one of reference signal received power, RSRP, signal to noise ratio, SNR.
20. The apparatus of claim 19, wherein the determining the M base stations according to the target measurement quantity specifically comprises:
determining the M base stations according to the sequence of the values of the target measurement quantity of each base station; or
And determining the M base stations according to the relation between the target measurement quantity of each base station and a target threshold value.
21. A position recognition apparatus, comprising:
the first obtaining unit is used for obtaining a first distance between a first base station in the M base stations and a terminal to be positioned and a second distance between at least two base stations except the first base station in the M base stations and the terminal to be positioned;
a second obtaining unit, configured to obtain a first difference value between each of the second distances and the first distance, respectively;
a position identification unit, configured to determine a position of the terminal to be positioned according to the first target base station corresponding to the minimum value in the first difference value;
wherein M is greater than or equal to 3.
22. A processor-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the position recognition method according to any one of claims 1 to 10.
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