CN112462354A - Positioning method based on single base station, electronic device and storage medium - Google Patents

Positioning method based on single base station, electronic device and storage medium Download PDF

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Publication number
CN112462354A
CN112462354A CN202110139591.0A CN202110139591A CN112462354A CN 112462354 A CN112462354 A CN 112462354A CN 202110139591 A CN202110139591 A CN 202110139591A CN 112462354 A CN112462354 A CN 112462354A
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base station
signal
user terminal
signal power
positioning
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CN202110139591.0A
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CN112462354B (en
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袁勇超
黄传彬
张宏亮
王静
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Zhejiang Sunwave Communications Technology Co Ltd
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Zhejiang Sunwave Communications Technology Co Ltd
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Priority to PCT/CN2021/091261 priority patent/WO2022166009A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
    • 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

Abstract

The application relates to a positioning method based on a single base station, a base station, an electronic device and a storage medium, which are applied to positioning of a user terminal moving along a channel extending in a single direction, wherein the positioning method based on the single base station comprises the following steps: setting a base station at one end of the channel, recording the position information of the base station, and configuring the coverage range of the base station to cover the other end of the channel in the single direction; counting the signal power of a transmission signal between the base station and the user terminal in the coverage area in a historical period, and determining the linear distance between the base station and the user terminal at the current moment according to the signal power of the transmission signal; and positioning the position of the user terminal at the current moment on the path of the channel according to the linear distance and the position information of the base station. By the method and the device, the problem of high cost of positioning the user terminal in a scene with a long and narrow channel is solved, and the positioning of the user terminal based on a single base station is realized.

Description

Positioning method based on single base station, electronic device and storage medium
Technical Field
The present application relates to the field of positioning technologies, and in particular, to a positioning method based on a single base station, a base station, an electronic device, and a storage medium.
Background
Positioning refers to the process of obtaining the position of an object to be positioned in a specific reference coordinate system by some method or means. In the related art, positioning based on a user terminal is mainly realized through triangulation, and the basic idea is that the user terminal receives signals from three or more base stations with known positions, then obtains the position relationship of the two according to the contained information related to the position of the user terminal, and finally positions the user terminal according to a related positioning algorithm. In the related art, in a scene with a long and narrow channel, such as a security check port, a campus entrance, and the like, a plurality of base stations need to be deployed for user terminal positioning, which may result in high positioning cost.
At present, no effective solution is provided for the problem of high cost of positioning the user terminal in a scene with a long and narrow channel in the related art.
Disclosure of Invention
The embodiment of the application provides a positioning method based on a single base station, a base station, an electronic device and a storage medium, so as to at least solve the problem of high cost of positioning a user terminal in a scene with a long and narrow channel in the related art.
In a first aspect, an embodiment of the present application provides a positioning method based on a single base station, which is applied to positioning of a user terminal moving along a channel extending in a single direction, where the method includes:
setting a base station at one end of the channel, recording the position information of the base station, and configuring the coverage range of the base station to cover the other end of the channel in the single direction;
counting the signal power of transmission signals between the base station and the user terminal in the coverage area in a historical period, and determining the linear distance between the base station and the user terminal at the current moment according to the signal power of the transmission signals;
and positioning the position of the user terminal at the current moment on the path of the channel according to the linear distance and the position information of the base station.
In some of these embodiments, the transmission signal includes an upstream signal and/or a downstream signal.
In some embodiments, determining the linear distance between the base station and the user terminal at the current time according to the signal power of the transmission signal comprises:
performing linear fitting on the signal power of the transmission signal in the historical time period to obtain a signal fitting line;
determining the signal power value of the transmission signal between the base station and the user terminal at the current moment according to the signal fitting line;
and determining a linear distance between the base station and the user terminal at the current moment according to the signal power value and a preset path attenuation model, wherein the preset path attenuation model is used for representing a corresponding relation between the signal power value and the linear distance.
In some embodiments, in the case that the transmission signal includes a plurality of signals, determining the linear distance between the base station and the user terminal at the current time according to the signal power of the transmission signal includes:
respectively performing linear fitting on the signal power of each transmission signal in the historical time period to obtain a plurality of signal fitting lines;
determining an average signal power value of a transmission signal between the base station and the user terminal at the current moment according to a plurality of signal fitting lines;
and determining a linear distance between the base station and the user terminal at the current moment according to the average signal power value and a preset attenuation model, wherein the preset path attenuation model is used for representing a corresponding relation between the signal power value and the linear distance.
In some of these embodiments, prior to linearly fitting the signal power of the transmitted signal over the historical period, the method further comprises:
removing outliers in the signal power of the transmission signal.
In some of these embodiments, the method further comprises:
and determining the moving speed of the user terminal according to the slope of the signal fitting line.
In some of these embodiments, the signal power of the transmission signal comprises RSRP.
In some of these embodiments, counting the signal power of transmission signals between the base station and the user terminals in the coverage area over a history period comprises:
counting RSRP values of downlink signals reported after the user terminal accesses the base station in a historical period, wherein the signal power of the transmission signals comprises the RSRP values of the downlink signals; and/or
And counting the RSRP value of an uplink signal of the user terminal received by an uplink antenna of the base station when the user terminal accesses the base station in a historical period, wherein the signal power of the transmission signal comprises the RSRP value of the uplink signal.
In some of these embodiments, the user terminal accesses the base station a plurality of times during a history period.
In some embodiments, the base station is further configured to update the TAC value of the base station according to a set period, so that the user terminal accesses the base station multiple times according to the set period.
In some embodiments, in the case that the user terminal is located in the coverage area of the base station and other base stations, the priority of accessing the base station by the user terminal is higher than the priority of accessing other base stations.
In some embodiments, the coverage area is a sector with the base station as a sector center, and the included angle of the sector ranges from 5 ° to 15 °.
In a second aspect, an embodiment of the present application provides a base station, where the base station includes a signal processing unit and an antenna unit; the antenna unit is used for forming a coverage range of a transmission signal; the signal processing unit is configured to perform the single base station based positioning method according to the first aspect.
In some of these embodiments, the base station comprises a mobile base station.
In some of these embodiments, the antenna units include one or more uplink antenna units and one or more downlink antenna units.
In some of these embodiments, the base station is an LTE base station or a 5G base station.
In some of these embodiments, the base station further comprises a positioning unit for positioning the location information of the base station.
In some embodiments, the base station further comprises an input unit for receiving input data, wherein the input data comprises: and updating the set period of the TAC value of the base station and/or the position information of the base station.
In a third aspect, an embodiment of the present application provides an electronic apparatus, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and when the processor executes the computer program, the processor implements the single base station-based positioning method according to the first aspect.
In a fourth aspect, the present application provides a storage medium, on which a computer program is stored, where the program is executed by a processor to implement the single base station based positioning method according to the first aspect.
Compared with the related art, the positioning method based on the single base station, the electronic device and the storage medium provided by the embodiment of the application are applied to positioning of the user terminal moving along a channel extending in a single direction, the base station is arranged at one end of the channel, the position information of the base station is recorded, and the coverage range of the base station is configured to be capable of covering the other end of the channel in the single direction; counting the signal power of a transmission signal between the base station and the user terminal in the coverage area in a historical period, and determining the linear distance between the base station and the user terminal at the current moment according to the signal power of the transmission signal; according to the linear distance and the position information of the base station, the position of the user terminal at the current moment is positioned on the path of the channel, the problem of high cost of positioning the user terminal in a scene with a long and narrow channel is solved, and the positioning of the user terminal based on a single base station is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of a single base station based positioning method according to an embodiment of the present application;
FIG. 2 is a schematic view of a channel according to an embodiment of the present application;
fig. 3 is a flowchart of another single base station based positioning method according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a signal fit curve according to an embodiment of the present application;
fig. 5 is a schematic diagram of signaling interaction in a positioning method according to a preferred embodiment of the present application;
fig. 6 is a block diagram of a base station according to an embodiment of the present application;
fig. 7 is a block diagram of the inside of a computer device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
In this embodiment, a single base station based positioning method is provided, where the positioning method is applied to positioning of a user terminal moving along a channel extending in a single direction, fig. 1 is a flowchart of a single base station based positioning method according to an embodiment of the present application, and as shown in fig. 1, the flowchart includes the following steps:
step S102, a base station is arranged at one end of the channel, the position information of the base station is recorded, and the coverage area of the base station is configured to be capable of covering the other end of the channel in the single direction.
Wherein, the user terminal always moves along the channel. It should be noted that the user terminal may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices. The base station can be deployed in advance by field workers according to actual conditions, and the specific position of the single base station is determined, so that the position information of the single base station is obtained. It should be noted that the single base station may be an LTE base station. Compared with a public network base station, the LTE base station has the following advantages: stronger Reference Signal Receiving Power (RSRP), better Reference Signal Receiving Quality (RSRQ), better Signal to Interference plus Noise Ratio (SINR), and higher handover priority. Therefore, the LTE base station is selected as the single base station, and the efficiency and the accuracy of positioning the user terminal are improved.
Specifically, fig. 2 is a schematic diagram of a channel according to an embodiment of the present application, as shown in fig. 2, the channel is a pre-selected path passing through a coverage area of a base station; the preset path is provided with a gate for identifying the identity of the user, and the section of the channel provided with the gate is within the coverage range of the base station. The antenna of the base station faces one end provided with the gate along the channel, the coverage range of the antenna is a sector taking the base station as a sector center, and the included angle range of the sector is 5-15 degrees. It should be noted that the base station may be configured as a mobile base station, for example, the mobile base station may be configured on a mobile device such as a trolley, and the staff moves the mobile device to control the mobile base station to move, as long as the antenna coverage area of the mobile base station can cover the section of the passageway where the gate is disposed.
Step S104, counting the signal power of the transmission signal between the base station and the user terminal in the coverage area in the historical time period, and determining the straight line distance between the base station and the user terminal at the current moment according to the signal power of the transmission signal.
The historical time period is a time period which passes in the process of positioning the user terminal. Specifically, by using a Physical Random Access Channel (PRACH) mechanism, the base station transmits a radio frequency signal to a wireless environment, and when the ue moves on the Channel and enters the coverage area, the base station performs real-time signaling interaction with the ue.
The user terminal periodically performs random access action, the uplink access and synchronization with the base station are achieved through the uplink PRACH, random access lead codes (Preamble codes) on the PRACH channel are used for access, and the number of the Preamble codes in the coverage area of the base station is 64. The Preamble code is generated by a cyclic shift of a ZC sequence with a length 839, wherein the ZC sequence length can also be set to 139 according to the configuration of the base station. ZC sequences have ideal autocorrelation properties and optimal cross-correlation properties under such autocorrelation properties. The base station configures a format and a position in a time domain of a PRACH channel by a PRACH configuration index (PRACH-ConfigIndex), configures a frequency domain position of the PRACH channel by a PRACH frequency domain offset (PRACH-freqOffset), and configures a value of a ZC cyclic shift by a PRACH zero correlation configuration (PRACH _ zero _ correlation). Therefore, the user terminal can actively send handover or reselection in the wireless environment and continuously perform signaling interaction with the single base station in a historical period.
It should be noted that the base station is further configured to update the TAC value of the base station according to a set period, so that the user terminal accesses the base station multiple times according to the set period; in order to increase the frequency of accessing the base station by the user terminal, the TAC update period of the base station may be set to 1 minute or less.
The user terminal in the coverage area is accessed to the base station for signaling interaction through the steps, and the signal power of the interactive transmission signal between the base station and the user terminal in the historical period is counted. When the user terminal is located in the coverage area of the base station and other base stations, the priority of accessing the base station by the user terminal is higher than the priority of accessing other base stations, so that the user terminal can be ensured to be accessed to the base station in time and perform positioning aiming at the user terminal. The straight-line distance between the base station and the user terminal at the current moment can then be calculated based on the loss of the signal power during transmission.
Step S106, according to the straight line distance and the position information of the base station, the position of the user terminal at the current moment is positioned on the path of the channel.
The location information of the base station may include information such as latitude and longitude of the base station. In a scene with a long and narrow channel, such as a security inspection opening, a park entrance, and the like, a deviation angle between a series of linear distances from the user terminal to the base station within a period of time is within an azimuth angle of the base station antenna, so that the positioning result of the user terminal on the preset path can be obtained by combining the linear distance obtained in the step S104 with the position information of the single base station.
Through the above steps S102 to S106, by recording the location information of the base station disposed at one end of the channel, the linear distance between the base station and the user terminal is obtained according to the signal power of the transmission signal between the base station and the user terminal in the history period, and the location of the user terminal on the path of the channel at the current moment is located according to the linear distance and the location information of the base station, the location of the user terminal applied to the channel extending in a single direction is realized based on a single base station, the high cost phenomenon caused by the location of multiple base stations is avoided, and the problem of high cost of the location of the user terminal in the scene with a long and narrow channel is solved.
In some embodiments, a single base station based positioning method is provided, and fig. 3 is a flowchart of another single base station based positioning method according to an embodiment of the present application, and as shown in fig. 3, the flowchart includes the following steps:
step S302, counting the signal power of the transmission signal between the base station and the user terminal in the coverage area in the historical time period, and performing linear fitting on the signal power of the transmission signal in the historical time period to obtain a signal fitting line.
The user terminal reports the transmission signal each time it accesses the base station, and the signal power of the transmission signal is easily affected by the environment to change suddenly, such as the shielding of people or objects, and the signal power changes caused by changing the holding mode and wearing mode of the user terminal. In order to eliminate the mutation, linear fitting can be carried out on a group of signal power values reported each time in a historical period, so as to obtain a signal fitting line; it will be appreciated that the signal fit line may be a straight line or a curved line. The history period may be preset, for example, may be set to 40 s.
Step S304, according to the signal fitting line, determining the signal power value of the transmission signal between the base station and the user terminal at the current moment.
Comparing the signal power values of the points in the historical time period with the signal fitting line obtained in the step S302 in sequence, and if the signal power value of a certain point is too far away from the signal fitting line, which indicates that the signal power value of the point is mutated, rejecting the signal power value of the point; and finally, taking the residual signal power value after the elimination as the normal signal power value of the transmission signal.
Step S306, determining a linear distance between the base station and the user equipment at the current time according to the signal power value and a preset path attenuation model, wherein the preset path attenuation model is used for representing a corresponding relationship between the signal power value and the linear distance.
The formula applied by the preset path attenuation model is shown in formula 1:
lr =20lgD +20lgF +32.4 formula 1
Wherein Lr represents a path loss of the signal power value; f represents the current frequency, which can be the uplink signal frequency of the base station or the downlink signal frequency of the base station, and is determined according to the actual deployment situation of the base station; d represents the linear distance between the user terminal and the base station. Therefore, the straight-line distance can be calculated by the preset path attenuation model shown in the above equation 1.
Through the steps S302 to S308, positioning the user terminal based on a single base station and a single antenna; and a user terminal positioning result with high accuracy is obtained by utilizing a repeated acquisition positioning technology for receiving uplink signals within a certain time range and an interference data filtering technology for fitting a curve to screen data, so that accurate positioning based on a single base station is realized.
In some embodiments, in the case that the transmission signal includes a plurality of signals, the single base station based positioning method further includes the following steps:
step S402, respectively performing linear fitting on the signal power of each transmission signal in the historical time period to obtain a plurality of signal fitting lines; in this case, in actual deployment, multiple antennas are deployed at different positions of the base station, and multiple transmission signals are received or transmitted through the multiple antennas respectively.
Taking the plurality of transmission signals including the downlink signal, the first uplink signal and the second uplink signal as an example, fig. 4 is a schematic diagram of a signal fitting curve according to an embodiment of the present application, and as shown in fig. 4, a signal power-time curve of the downlink signal, a signal power-time curve of the first uplink signal, and a signal power-time curve of the second uplink signal are respectively shown, and linear fitting is respectively performed on the three signal power-time curves, so as to obtain a corresponding signal fitting line of the downlink signal, a signal fitting line of the first uplink signal, and a signal fitting line of the second uplink signal, which are respectively the downlink fitting line, the first uplink fitting line, and the second uplink fitting line shown in fig. 4, which are respectively shown by each dotted line in fig. 4.
Step S404, determining an average signal power value of the transmission signal between the base station and the ue at the current time according to the plurality of signal fit lines.
And determining multiple groups of normal signal power values at the current moment based on the multiple signal fit lines, and averaging the multiple groups of signal power values to obtain an average signal power value.
Step S406, determining a linear distance between the base station and the user equipment at the current time according to the average signal power value and a preset attenuation model, wherein the preset path attenuation model is used for representing a corresponding relationship between the signal power value and the linear distance.
The average signal power value obtained in step S404 is substituted into the preset path attenuation model shown in formula 1, so as to obtain the linear distance between the base station and the user terminal.
It should be noted that, as shown in fig. 4, before performing the linear fitting on the signal power of the transmission signal in the history period, the method further includes removing outliers in the signal power of the transmission signal. In the application, the outlier refers to that one or more values in the signal power value have larger difference compared with other values, and the outlier in the signal power can be calculated and removed firstly based on methods such as standard deviation and the like; the signal power after the outlier is removed is utilized to carry out linear fitting, so that a fitted signal fitting line can be more accurate, and the accuracy of single base station positioning is effectively improved.
And further comprising: and determining the moving speed of the user terminal according to the slope of the signal fitting line. Referring to fig. 4, the trend of each signal fit line is that the longer the time, the larger the signal power value is, which indicates that the user terminal moves closer to the base station on the channel at this time; the larger the slope of each signal fit line is, the larger the variation trend of each signal fit line is, i.e. the faster the moving speed of the user terminal is. Conversely, the smaller the slope of the signal fit line, the slower the movement speed of the user terminal.
Through the steps S402 to S406, the base station deploys a plurality of antennas, correspondingly transmits a plurality of transmission signals, obtains a plurality of signal fitting lines by respectively performing linear fitting on the signal power of each transmission signal in the historical time period, determines an average signal power value according to the plurality of signal fitting lines, and eliminates a common error based on the plurality of transmission signals according to the average signal power value and a preset attenuation model, thereby further improving the accuracy of positioning the user terminal in a single base station. It should be noted that, in the coverage area of the base station, since the antenna azimuth angle of the base station is sufficiently small, for example, 5 ° or 10 °, the main positioning error is in a sector coverage area with the base station as the sector center, and since the distances from the ue to the base station on the arc edge of the sector coverage area are the same, the positioning error can be eliminated by detecting more than two antennas at the same time, so as to improve the accuracy of positioning the ue.
In some embodiments, the signal power of the transmission signal includes RSRP, and the flow of counting the signal power of the transmission signal between the base station and the user terminal in the coverage area in the historical period in the positioning method further includes the following steps:
counting RSRP values of downlink signals reported after the user terminal accesses the base station in a historical period, wherein the signal power of the transmission signals comprises the RSRP values of the downlink signals; and/or counting the RSRP value of the uplink signal of the user terminal received by the uplink antenna of the base station when the user terminal accesses the base station in the historical period, wherein the signal power of the transmission signal comprises the RSRP value of the uplink signal.
Specifically, the transmission signal between the base station and the user terminal includes a downlink signal and/or an uplink signal. If the transmission signal only includes a downlink signal, that is, after the ue accesses the base station in the historical period, the base station transmits the downlink signal to the ue, wherein the ue can access the base station multiple times in the historical period. Then, a group of RSRP values of the downlink signal is counted, so that the linear distance between the user terminal and the base station is calculated and obtained based on the group of RSRP values; based on the RSRP value of the downlink signal, a calculation formula using a preset path loss model is shown in formula 2:
RSRP1=P0+G0-32.4-20lgD1-20lgF1equation 2
In formula 2, RSRP1 represents a downlink signal; p0Representing the base station transmission power, P0The unit of (d) can be converted to dBm; f1Represents the downlink signal frequency in MHz; g0Represents the base station antenna gain; d1Indicating the calculated first distance path between the base station and the user terminal. Then, according to a set of RSRP value data of the downlink signal, the linear distance D between the ue and the base station can be calculated by using the preset path attenuation model shown in the above formula 21。
If the transmission signal only comprises an uplink signal, namely after the user terminal accesses the base station in a historical period, the base station receives the uplink signal reported by the user terminal and counts a group of RSRP values of the uplink signal so as to calculate and obtain a linear distance between the user terminal and the base station based on the group of RSRP values; based on the RSRP value of the uplink signal, a calculation formula using a preset path loss model is shown in formula 3:
RSRP2=P1-32.4-20lgD1-20lgF2equation 3
In formula 3, RSRP1 represents an uplink signal; p1Indicating the user terminal transmission power, P1The unit of (d) can be converted to dBm; f2Represents the uplink signal frequency in MHz; d2Indicating the calculated second distance path between the base station and the user terminal. Then, according to a set of data of the uplink signal, a straight-line distance D between the ue and the base station can be calculated by using the path attenuation model2。
If the transmission signal includes a downlink signal and an uplink signal, that is, after the user terminal accesses the base station in a historical period, the base station transmits the downlink signal to the user terminal and receives the uplink signal reported by the user terminal, so as to respectively count a group of RSRP values of the downlink signal and a group of RSRP values of the uplink signal. Wherein, the linear distance D can be obtained based on the RSRP value of the downlink signal by the above formula 2 and the above formula 3, respectively1And obtaining a linear distance D based on the RSRP value of the uplink signal2By setting the above straight-line distance D1And a linear distance D2Taking the average to obtain more essenceAnd determining the final straight-line distance between the user terminal and the base station.
In some embodiments, the single base station based positioning method further includes the following steps: and under the condition that N user terminals are positioned in the coverage range of the base station, receiving uplink signals of the N user terminals in real time through an uplink antenna of the single base station. It should be noted that each uplink signal is a signal that is received by a single base station within a certain time range and is continuously transmitted by each corresponding user terminal.
It should be noted that, when the user equipment transmits a signal coverage in the access base station, one of 64 Preamble codes specified in the coverage is randomly selected according to a certain rule, and is randomly accessed at a specified frame and subframe time. The LTE base station reports the Preamble code corresponding to the acquired International Mobile Subscriber Identity (IMSI) and the frame number and subframe number where the Preamble code appears to the server for processing. The server performs comprehensive calculation according to the N uplink signals, the downlink signal and the base station transmitting power of the single base station by using a difference technology and a preset path attenuation model shown in the formula 1 in combination with RSRP and acquisition time reported to the single base station when the user terminal is accessed, and can match and distinguish the distance and position information of a plurality of IMSIs acquired in the same time period.
Through the embodiment, the uplink signals corresponding to the plurality of user terminals are obtained, and then the positioning results matched with the user terminals are obtained through calculation, and the distance between the user terminals is not limited, namely the distance can be very short, for example, within the range of 5 m, the positioning results can still be detected, so that the plurality of user terminals can be accurately positioned at the same time.
The following describes embodiments of the present application in detail with reference to an actual application scenario, in which a single base station is selected as an LTE base station, and a user terminal is selected as a mobile phone. Fig. 4 is a schematic diagram of signaling interaction in a positioning method according to a preferred embodiment of the present application, and as shown in fig. 4, an LTE base station transmits downlink power P0And sends the downlink signal of the LTE base station through the antennaGiving the mobile phone; the mobile phone receives the downlink signal of the LTE base station and sends the uplink signal of the mobile phone through the antenna; wherein, the first up antenna receives the up transmitting power P of the mobile phone1The LTE base station receives the first uplink signal through the first uplink antenna, and the second uplink antenna receives the uplink transmitting power P of the mobile phone1And the LTE base station receives the second uplink signal through the second uplink antenna, so that signaling interaction between the LTE base station and the mobile phone is realized. And by utilizing a preset path loss model, according to the position information deployed by the LTE base station and the signaling interaction, the mobile phone positioning can be obtained.
It should be understood that although the steps in the flowcharts of fig. 1 and 3 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1 and 3 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
Fig. 6 is a block diagram of a base station according to an embodiment of the present application, and as shown in fig. 6, the base station includes a signal processing unit 62 and an antenna unit 64; the antenna unit 64 is used for forming a coverage range of a transmission signal; the signal processing unit 62 is configured to perform any one of the positioning methods based on a single base station in the foregoing embodiments.
Through the above embodiment, the signal processing unit 62 in the base station obtains the linear distance between the base station and the user terminal by processing the user terminal located in the coverage of the transmission signal formed by the antenna unit 64, and locates the position of the user terminal on the path of the channel at the current moment according to the linear distance and the position information of the base station, and the positioning applied to the user terminal moving on the channel extending in a single direction is realized based on a single base station, so that the high cost phenomenon caused by the positioning of multiple base stations is avoided, and the problem of high cost of the positioning of the user terminal in the scene with a long and narrow channel is solved.
In some of these embodiments, the base station comprises a mobile base station. The mobile base station can move freely on the mobile equipment such as a trolley and the like by being arranged, and the coverage area of the antenna of the mobile base station can cover the channel, so that the base station can be deployed more flexibly and conveniently.
In some of these embodiments, the antenna units 64 include one or more uplink antenna units and one or more downlink antenna units.
In some of these embodiments, the base station is an LTE base station or a 5G base station.
In some of these embodiments, the base station further comprises a positioning unit for positioning the location information of the base station.
In some embodiments, the base station further comprises an input unit for receiving input data, wherein the input data comprises: and updating the set period of the TAC value of the base station and/or the position information of the base station. It should be noted that the TAC value of the base station may be preset and updated to a set period of 1 minute or less, so as to avoid that the user terminal cannot report signals to the base station due to an excessively long TAC period, so that transmission signals of the user terminal continuously received by the base station may be more intensive, and therefore, positioning of a single base station based on the transmission signals may be more accurate. Also, the location information of the base station may be input in advance after the base station is deployed.
The embodiment also provides a computer device, which may be a server, and fig. 7 is a structural diagram of the inside of the computer device according to the embodiment of the present application, as shown in fig. 7. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing location information of the base station. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement the single base station based positioning method described above.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
The present embodiment also provides an electronic device comprising a memory having a computer program stored therein and a processor configured to execute the computer program to perform the steps of any of the above method embodiments.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
and S1, arranging a base station at one end of the channel, recording the position information of the base station, and configuring the coverage area of the base station to be capable of covering the other end of the channel in the single direction.
S2, counting the signal power of the transmission signal between the base station and the ue in the coverage area in the historical period, and determining the linear distance between the base station and the ue at the current time according to the signal power of the transmission signal.
And S3, positioning the position of the user terminal at the current time on the path of the channel according to the linear distance and the position information of the base station.
It should be noted that, for specific examples in this embodiment, reference may be made to examples described in the foregoing embodiments and optional implementations, and details of this embodiment are not described herein again.
In addition, in combination with the positioning method based on a single base station in the foregoing embodiments, the embodiments of the present application may provide a storage medium to implement. The storage medium having stored thereon a computer program; the computer program, when executed by a processor, implements any one of the single base station based positioning methods in the above embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (20)

1. A single base station based positioning method applied to positioning of a ue moving along a path extending in a single direction, the method comprising:
setting a base station at one end of the channel, recording the position information of the base station, and configuring the coverage range of the base station to cover the other end of the channel in the single direction;
counting the signal power of transmission signals between the base station and the user terminal in the coverage area in a historical period, and determining the linear distance between the base station and the user terminal at the current moment according to the signal power of the transmission signals;
and positioning the position of the user terminal at the current moment on the path of the channel according to the linear distance and the position information of the base station.
2. The method of claim 1, wherein the transmission signal comprises an uplink signal and/or a downlink signal.
3. The method of claim 1, wherein determining the linear distance between the base station and the user terminal at the current time according to the signal power of the transmission signal comprises:
performing linear fitting on the signal power of the transmission signal in the historical time period to obtain a signal fitting line;
determining the signal power value of the transmission signal between the base station and the user terminal at the current moment according to the signal fitting line;
and determining a linear distance between the base station and the user terminal at the current moment according to the signal power value and a preset path attenuation model, wherein the preset path attenuation model is used for representing a corresponding relation between the signal power value and the linear distance.
4. The method of claim 1, wherein in the case that the transmission signal comprises a plurality of signals, determining the linear distance between the base station and the user terminal at the current time according to the signal power of the transmission signal comprises:
respectively performing linear fitting on the signal power of each transmission signal in the historical time period to obtain a plurality of signal fitting lines;
determining an average signal power value of a transmission signal between the base station and the user terminal at the current moment according to a plurality of signal fitting lines;
and determining a linear distance between the base station and the user terminal at the current moment according to the average signal power value and a preset attenuation model, wherein the preset path attenuation model is used for representing a corresponding relation between the signal power value and the linear distance.
5. The method of claim 4, wherein prior to linearly fitting the signal power of the transmitted signal over the historical period, the method further comprises:
removing outliers in the signal power of the transmission signal.
6. The method of claim 4, further comprising:
and determining the moving speed of the user terminal according to the slope of the signal fitting line.
7. The method of claim 1, wherein the signal power of the transmission signal comprises RSRP.
8. The method of claim 1, wherein counting signal powers of transmission signals between the base station and the user terminals in the coverage area in a history period comprises:
counting RSRP values of downlink signals reported after the user terminal accesses the base station in a historical period, wherein the signal power of the transmission signals comprises the RSRP values of the downlink signals; and/or the presence of a gas in the gas,
and counting the RSRP value of an uplink signal of the user terminal received by an uplink antenna of the base station when the user terminal accesses the base station in a historical period, wherein the signal power of the transmission signal comprises the RSRP value of the uplink signal.
9. The method of claim 8, wherein the user terminal accesses the base station multiple times within a historical period.
10. The method of claim 8, wherein the base station is further configured to update the TAC value of the base station according to a set period, so that the ue accesses the base station multiple times according to the set period.
11. The method of claim 8, wherein the user terminal has a higher priority for accessing the base station than for accessing other base stations if the user terminal is located within the coverage of the base station and other base stations.
12. The method according to any of claims 1 to 11, wherein the coverage area is a sector with the base station as a sector center, and the sector angle is in a range of 5 ° to 15 °.
13. A base station, characterized in that the base station comprises a signal processing unit and an antenna unit; the antenna unit is used for forming a coverage range of a transmission signal; the signal processing unit is configured to perform the single base station based positioning method according to any one of claims 1 to 12.
14. The base station of claim 13, wherein the base station comprises a mobile base station.
15. The base station of claim 13, wherein the antenna units comprise one or more uplink antenna units and one or more downlink antenna units.
16. The base station of claim 13, wherein the base station is an LTE base station or a 5G base station.
17. The base station of claim 13, wherein the base station further comprises a positioning unit for positioning the location information of the base station.
18. The base station of claim 13, further comprising an input unit configured to receive input data, wherein the input data comprises: and updating the set period of the TAC value of the base station and/or the position information of the base station.
19. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and the processor is configured to execute the computer program to perform the single base station based positioning method according to any one of claims 1 to 12.
20. A storage medium having a computer program stored thereon, wherein the computer program is configured to perform the single base station based positioning method of any one of claims 1 to 12 when running.
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