CN116156620A - Terminal position measuring method, terminal, base station, electronic device and storage medium - Google Patents
Terminal position measuring method, terminal, base station, electronic device and storage medium Download PDFInfo
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Abstract
The invention relates to the technical field of mobile communication, and discloses a terminal position measuring method, a terminal, a base station, electronic equipment and a storage medium. The method for measuring the position of the terminal comprises the following steps: selecting at least one reference signal for measuring time difference from received reference signals of a base station, and measuring the time difference of arrival of a plurality of adjacent cells by using the selected reference signal; reporting the measured time differences and the type of the selected reference signal to the base station, so that the base station can estimate the position information of the terminal according to the time differences and the type of the selected reference signal. The terminal can report more position related information to the base station, and the positioning precision of the terminal is improved.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method for measuring a terminal position, a terminal, a base station, an electronic device, and a storage medium.
Background
Drive test is an important task in evaluating and optimizing wireless networks. To reduce the cost of drive test overhead and shorten the optimization period, the third generation partnership project (3 rd Generation Partnership Project, abbreviated as "3 GPP") introduced minimum drive test (Minimization of Drive Test, abbreviated as "MDT") as a network self-optimization (Self Organizing Networks, abbreviated as "SON") approach in the release of long term evolution (Long Term Evolution, abbreviated as "LTE") systems released at the end of 2009. The MDT technology controls the terminal through the network, so that the terminal actively reports the position information and signal information of the terminal and measurement parameters acquired from the terminal and the base station, and the information is used for evaluating the coverage condition of the wireless network.
However, the conventional MDT technology is limited in application scenario, the acquisition of the location information of the terminal depends on the hardware configuration of the terminal or the base station, and it is difficult to ensure the accuracy of the acquired location information.
Disclosure of Invention
The embodiment of the invention aims to provide a terminal position measuring method, a terminal, a base station, electronic equipment and a storage medium, which are used for enabling the terminal to report more position related information to the base station and improving the positioning accuracy of the terminal.
To achieve the above object, an embodiment of the present invention provides a method for measuring a terminal position of a terminal having a minimization of drive test MDT function, including: selecting at least one reference signal for measuring time difference from received reference signals of the base station, and measuring the time difference of signal transmission of a plurality of adjacent cells reaching the terminal by using the selected reference signal; reporting the measured time differences and the type of the selected reference signal to the base station, so that the base station can estimate the position of the terminal according to the time differences and the type of the selected reference signal.
To achieve the above object, an embodiment of the present invention provides a method for measuring a terminal position applied to a base station, including: transmitting a plurality of reference signals for the terminal to receive and select at least one of the plurality of reference signals for measuring the time difference; receiving time differences of a plurality of adjacent cells transmitted by a terminal to the terminal and the type of a selected reference signal; the position of the terminal is estimated based on the received plurality of time differences and the type of reference signal selected.
The embodiment of the invention also provides a terminal, which comprises: the measuring module is used for selecting at least one time difference for measuring from the received reference signals of the base station, and measuring the time difference of a plurality of adjacent cells reaching the terminal by using the selected reference signals; and the reporting module is used for reporting the measured time differences and the type of the selected reference signal to the base station, so that the base station can estimate the position of the terminal according to the time differences and the type of the selected reference signal.
The embodiment of the invention also provides a base station, which comprises: a transmitting module, configured to transmit a plurality of reference signals, for the terminal to receive and select at least one of the plurality of reference signals for measuring a time difference; the receiving module is used for receiving the time difference of the arrival of a plurality of adjacent cells sent by the terminal at the terminal and the type of the selected reference signal; and the acquisition module is used for estimating the position of the terminal according to the received time differences and the type of the selected reference signal.
The embodiment of the invention also provides electronic equipment, which comprises: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method for measuring a terminal position of a terminal or to perform the method for measuring a terminal position of a base station.
The embodiment of the invention also provides a computer readable storage medium storing a computer program, which when executed by a processor, realizes the method for measuring the terminal position applied to the terminal or the method for measuring the terminal position applied to the base station.
The embodiment of the invention selects at least one reference signal for measuring the time difference from the received reference signals of the base station, and measures the time difference of a plurality of adjacent cells reaching the terminal by using the selected reference signals. The reference signal that is used for measuring is equipped for the basic station to select, is not limited to positioning reference signal, can be the reference signal of original business demand, can avoid consuming extra transmission channel resource, realize improving the proportion of the position-related information that reports to the basic station. The terminal reports the measured time differences and the types of the reference signals to the base station, so that the base station can estimate the position of the terminal according to the time differences and the types of the reference signals, and the positioning accuracy of the terminal can be improved to a certain extent.
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One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures do not depict a proportional limitation unless expressly stated otherwise.
Fig. 1 is a flowchart of a terminal position measurement method applied to a terminal according to an embodiment of the present invention;
fig. 2 is a timing diagram of a terminal reporting a time difference to a base station according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for measuring a terminal position applied to a base station according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a terminal according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a base station according to an embodiment of the present invention;
fig. 6 is a schematic structural view of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present invention, numerous technical details have been set forth in order to provide a better understanding of the present invention. However, the claimed invention may be practiced without these specific details and with various changes and modifications based on the following embodiments.
An embodiment of the invention relates to a method for measuring a terminal position, which is applied to a terminal with a Minimization of Drive Test (MDT) function. In this embodiment, the terminal selects at least one of the received reference signals of the base station for measuring a time difference, and measures time differences of arrival of a plurality of neighboring cells at the terminal with the selected reference signal; reporting the measured time differences and the type of the selected reference signal to the base station, so that the base station can estimate the position of the terminal according to the time differences and the type of the selected reference signal. The specific flow of the terminal position measurement method of this embodiment may be as shown in fig. 1.
The position information is the main information collected by the MDT technology, and directly determines the using effect of the MDT. The traditional terminal obtains the position information mainly by three positioning methods of GPS positioning, different system measurement and Timing Advance (TA) integrated uplink Angle of Arrival (AOA).
For the manner of acquiring the terminal position information according to GPS positioning, the positioning result requires that the terminal can report the GPS position and turn on the GPS receiver. The positioning method has higher requirement on hardware configuration of the terminal, so that the proportion of information which can be reported by the terminal is very small, generally not more than 5%, and can be reported only outdoors. In the positioning method using the WIFI, bluetooth and other different system measurement, the base station is required to be configured to measure the position information, and the deployment of the different system network and the customized configuration of the base station side have higher difficulty, so that the positioning method is difficult to use in a large area.
In the positioning method of TA+AOA, the loop delay of the terminal and the base station can be obtained according to the receiving and transmitting time difference of the terminal and the receiving and transmitting time difference obtained by the base station measurement, the distance between the terminal and the base station is estimated approximately, and the angle of the terminal position relative to the base station antenna can be determined by the AOA obtained by the base station measurement. However, the measurement of AOA requires configuration of multiple antenna reception, and many base stations have relatively few receiving antennas, so that AOA cannot be measured. And the further away the AOA is from the base station, the worse the accuracy. Under the condition of no AOA matching, the position of the terminal can not be accurately determined only according to the loop delay of the terminal and the base station, the approximate azimuth of the terminal can only be roughly determined according to the received neighbor cell signals, and the positioning accuracy is low.
Besides the above three conventional positioning methods, there is a method with higher positioning accuracy currently that a terminal measures the time difference between the neighboring cell and the terminal according to a positioning reference signal (Positioning reference signals, abbreviated as "PRS") of the LTE system, so as to finally determine the location of the terminal. The time difference is measured without being influenced by external shielding, antenna types and antenna orientations, and is only influenced by signal reflection, so that the positioning accuracy is high. However, this method needs to configure PRS in the base station and send the relevant parameters to the terminal through a special channel, so that the terminal can measure the time difference. The method is more limited in practical application and has less use scenes.
The implementation details of the terminal position measurement method applied to the terminal in the present embodiment are specifically described below, and the following is merely for convenience in understanding the implementation details of the present embodiment, and is not necessary to implement the present embodiment. The specific flow is shown in fig. 1, and may include the following steps:
The reference signal transmitted by the base station may include one or any combination of the following: primary and secondary synchronization channels, cell reference signals, and positioning reference signals PRS. The Cell reference signals may further include Cell-specific reference signal (Cell-specific reference signals, abbreviated as "CRS") signals in the LTE system, and channel state information reference signal (Channel Status Information reference signals, abbreviated as "CSI-RS") signals in the New Radio, abbreviated as "NR") system.
When one of the received reference signals of the base station is selected to be used for measuring the time difference, the terminal can select the reference signal with highest precision from the reference signals transmitted by the base station to be used for measuring the time difference. In general, the wider the reference signal bandwidth used to measure the time difference, the higher the measurement accuracy. In the case that the base station in the LTE system is equipped with PRS, PRS is selected to measure the time difference, so that time difference data with higher accuracy can be obtained. If the base station is not equipped with PRS, a CRS with a relatively high number of subcarriers may be selected.
In the present embodiment, the terminal measures the position by an observed time difference of arrival (Observed Time Difference of Arrival, abbreviated as "OTDOA") method. In an actual scenario, the terminal may learn from a path such as a positioning server that the base station configures PRS, and then select PRS measurement time difference. The positioning server comprises an evolved serving mobile location center (Evolved Serving Mobile Location Center, abbreviated as "E-SMLC") in the LTE system or a positioning management function (Location Management Function, abbreviated as "LMF") module in the NR system, and the like.
Although reference signals such as a primary synchronization channel, a secondary synchronization channel, a cell reference signal and the like have poorer measurement accuracy than PRS time difference, the reference signals are required by service, and a terminal uses the reference signals to measure the time difference without consuming additional resources, so that more data can be reported to a base station. In addition, the purpose of the drive test is wireless network optimization, and in some situations, the wireless network optimization only needs to obtain the approximate condition of network coverage, and the accuracy requirement for positioning of a single terminal is not particularly high, so that the wireless network optimization is generally processed in a grid mode. The size of the grid is typically 10 x 10 meters, 20 x 20 meters, 50 x 50 meters, 100 x 100 meters, etc. Considering that the coverage evaluation of the minimization of drive tests is mainly performed with relatively coarse grid granularity, if relatively more measurement results can be obtained, the reduction of positioning accuracy can be compensated. Therefore, besides selecting the positioning parameter reference signals with more limiting conditions to perform time difference measurement, the reference signals with less limiting conditions can be selected to perform time difference measurement.
As will be appreciated by those skilled in the art, the time difference between arrival of a neighbor cell at a terminal referred to in this step is the time difference between arrival of a neighbor cell at a terminal relative to the serving cell of the terminal. I.e. measuring the time difference between the arrival of a neighbor cell at the terminal, with reference to the time of the serving cell to the terminal.
Specifically, the terminal reports the measured time differences and the selected reference signal type to the base station. And the base station estimates the position of the terminal according to the received time difference and the type of the reference signal, and realizes the positioning of the terminal. A timing diagram of the terminal reporting the time difference to the base station is shown in fig. 2.
The manner in which the terminal reports information to the base station is different according to the state of the terminal, and can be classified into instant reporting and delayed reporting. In an example of a terminal accessing the network, the terminal reports the measured time difference and the type of the selected reference signal to the base station via a measurement report (Measurement Report, abbreviated as "MR"). In an example that the terminal is not connected to the network, the terminal writes the measured time differences and the type of the selected reference signal into the local buffer, and after the terminal is connected to the network, reports the measured time differences and the type of the selected reference signal to the base station through signaling.
In practical implementation, when the terminal is in a call state, the terminal has a radio resource control (Radio Resource Control, abbreviated as "RRC") link with the base station, and the terminal may report information such as a time difference to the base station in a measurement report that is periodically sent. When the terminal is in a non-call state, namely in an IDLE (IDLE) state, after the subsequent terminal establishes an RRC (radio resource control) link with the base station to access the network, the signaling is used for reporting the measurement result to the base station.
In one example, after reporting the measured time differences and the selected reference signal types to the base station, the terminal may further generate a time difference measurement accuracy estimation value according to the selected reference signal; reporting the time difference measurement precision estimation value to a base station; the time difference measurement precision estimation value is used for the base station to carry out precision estimation on the received time differences. And reporting the estimated time difference measurement precision value to the base station, so that the time difference measurement precision can be further improved, and finally the terminal positioning precision can be improved.
Besides the time difference, the type of the reference signal and the estimated value of the measurement precision of the time difference, the terminal can report other measurement results to the base station, such as longitude and latitude obtained by GPS measurement.
In this embodiment, the terminal selects at least one of the received reference signals of the base station for measuring a time difference, and measures time differences of arrival of a plurality of neighbor cells at the terminal using the selected reference signal. The reference signal that is used for measuring is equipped for the basic station to select, is not limited to positioning reference signal, can be the reference signal of original business demand, can avoid consuming extra transmission channel resource, realize improving the proportion of the position-related information that reports to the basic station. The terminal reports the measured time differences and the types of the reference signals to the base station, so that the base station can estimate the position of the terminal according to the time differences and the types of the reference signals, and the positioning accuracy of the terminal can be improved to a certain extent.
An embodiment of the invention relates to a method for measuring a terminal position, which is applied to a base station. In this embodiment, the base station transmits a plurality of reference signals for the terminal to receive and select at least one of the plurality of reference signals for measuring the time difference; receiving time differences of a plurality of adjacent cells transmitted by a terminal to the terminal and the type of a selected reference signal; and estimating the position of the terminal according to the received time difference and the selected reference signal type.
The implementation details of the method for measuring the terminal position of the base station in this embodiment are specifically described below, and the following is only for facilitating understanding of the implementation details of this embodiment, and is not necessary for implementing this embodiment. The specific flow is shown in fig. 3, and may include the following steps:
In this step, the plurality of reference signals transmitted by the base station may include reference signals such as positioning reference signals PRS, cell reference signals, and primary and secondary synchronization signals.
The time difference sent by the terminal and received by the base station is measured by the terminal according to the selected reference signal, and the type of the reference signal is the signal type used for measuring the time difference. It is clear that this step corresponds to the implementation details of the position measurement method applied to the terminal in the previous embodiment, and the related technical details mentioned in the previous embodiment are still valid in this embodiment, so that the repetition is reduced, and the details are not repeated here.
In this step, the base station acquires location information of the terminal according to the received plurality of time differences and the type of the reference signal. The base station can convert the time difference from the adjacent cell to the terminal into the distance difference, and further realize the positioning of the terminal according to the distance difference and the position of the adjacent cell and the type of the reference signal.
In this embodiment, the base station receives the time difference of signal transmission of the plurality of neighbor cells to the terminal, which is transmitted by the terminal, and the type of reference signal for measuring the time difference. And then, the position information of the terminal is acquired according to the received time differences and the type of the reference signal, and the acquired position information can be higher in accuracy by combining the type of the reference signal to acquire the position of the terminal. In addition, the measurement of the terminal position information in the embodiment does not depend on the hardware configuration of the terminal or the base station, so that the terminal position can be acquired more conveniently.
One embodiment of the present invention relates to a terminal, as shown in fig. 4, comprising:
a measurement module 401, configured to select at least one of the received reference signals of the base station for measuring a time difference, and measure time differences of arrival of a plurality of neighboring cells at the terminal by using the selected reference signal;
and the reporting module 402 is configured to report the measured time differences and the selected reference signal type to the base station, where the base station obtains the location information of the terminal according to the time differences and the selected reference signal type.
In one example, when one of the received reference signals of the base station is selected for measuring the time difference, the measurement module 401 may be further configured to select the reference signal with the highest accuracy among the received reference signals of the base station for measuring the time difference.
In one example, the terminal may further include: a precision estimation module (not shown) for generating a time difference measurement precision estimation value according to the selected reference signal; reporting the time difference measurement precision estimation value to a base station; the time difference measurement precision estimation value is used for the base station to carry out precision estimation on the received time differences.
In one example, the reporting module 402 may be further configured to report the measured time differences and the selected reference signal type to the base station through a measurement report when the terminal accesses the network; and under the condition that the terminal is not connected to the network, writing the measured time differences and the selected reference signal types into a local cache, and reporting the measured time differences and the selected reference signal types to the base station through signaling after the terminal is connected to the network.
The terminal provided in this embodiment can select at least one reference signal from the received reference signals of the base station for measuring a time difference, and measure time differences of arrival of a plurality of neighboring cells at the terminal by using the selected reference signal. The reference signal that is used for measuring is equipped for the basic station to select, is not limited to positioning reference signal, can be the reference signal of original business demand, can avoid consuming extra transmission channel resource, realize improving the proportion of the position-related information that reports to the basic station. The terminal reports the measured time differences and the types of the reference signals to the base station, so that the base station can estimate the position of the terminal according to the time differences and the types of the reference signals, and the positioning accuracy of the terminal can be improved to a certain extent.
One embodiment of the present invention relates to a base station, as shown in fig. 5, comprising:
a transmitting module 501, configured to transmit a plurality of reference signals, for a terminal to receive and select at least one of the plurality of reference signals for measuring a time difference;
a receiving module 502, configured to receive time differences between arrival of a plurality of neighboring cells sent by a terminal at the terminal, and a type of a selected reference signal;
an obtaining module 503, configured to estimate a location of the terminal according to the received multiple time differences and the type of the selected reference signal.
The base station provided in this embodiment can receive time differences of signal transmissions of a plurality of neighboring cells reaching the terminal, which are sent by the terminal, and types of reference signals for measuring the time differences. And then, the position information of the terminal is acquired according to the received time differences and the type of the reference signal, and the acquired position information can be higher in accuracy by combining the type of the reference signal to acquire the position of the terminal. In addition, the measurement of the terminal position information in the embodiment does not depend on the hardware configuration of the terminal or the base station, so that the terminal position can be acquired more conveniently.
It should be noted that, each module in the above embodiment of the present invention is a logic module, and in practical application, one logic unit may be one physical unit, or may be a part of one physical unit, or may be implemented by a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, units that are not so close to solving the technical problem presented by the present invention are not introduced in the present embodiment, but this does not indicate that other units are not present in the present embodiment.
Embodiments of the present invention also provide an electronic device, as shown in fig. 6, comprising at least one processor 601; and a memory 602 communicatively coupled to the at least one processor 601; the memory 602 stores instructions executable by the at least one processor 601, and the instructions are executed by the at least one processor 601, so that the at least one processor 601 can perform the above-mentioned method for measuring a terminal position applied to a terminal or perform the method for measuring a terminal position applied to a base station.
Where the memory 602 and the processor 601 are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting the various circuits of the one or more processors 601 and the memory 602. The bus may also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or may be a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 601 is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor 601.
The processor 601 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 602 may be used to store data used by processor 601 in performing operations.
The above product may perform the method provided by the embodiment of the present invention, and has the corresponding functional module and beneficial effect of the performing method, and technical details not described in detail in the embodiment of the present invention may be referred to the method provided by the embodiment of the present invention.
Embodiments of the present invention also provide a computer-readable storage medium storing a computer program. The computer program, when executed by the processor, implements the above-described method of measuring a terminal position applied to a terminal, or implements the method of measuring a terminal position applied to a base station.
Those skilled in the art will appreciate that all or part of the steps in implementing the methods of the embodiments described above may be implemented by a program stored in a storage medium, including instructions for causing a device (which may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps in the methods of the embodiments of the invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The embodiments described hereinabove are intended to provide those of ordinary skill in the art with a variety of modifications and variations to the embodiments described above without departing from the spirit of the invention, and therefore the scope of the invention is not limited by the embodiments described hereinabove, but is to be accorded the broadest scope of the innovative features recited in the claims.
Claims (10)
1. A method for measuring a terminal position, which is applied to a terminal having a minimization of drive test MDT function, comprising:
selecting at least one reference signal for measuring time difference from received reference signals of a base station, and measuring time differences of a plurality of adjacent cells reaching the terminal by using the selected reference signals;
and reporting the measured time differences and the type of the selected reference signal to the base station, so that the base station can estimate the position of the terminal according to the time differences and the type of the selected reference signal.
2. The method according to claim 1, wherein when one of the received reference signals of the base station is selected for measuring the time difference, the selected reference signal is the reference signal with the highest accuracy among the received reference signals of the base station.
3. The method for measuring a terminal position according to claim 1, further comprising, after reporting the plurality of time differences obtained by measurement and the type of the selected reference signal to the base station:
generating a time difference measurement precision estimated value according to the selected reference signal;
reporting the time difference measurement precision estimation value to the base station;
the time difference measurement precision estimation value is used for the base station to carry out precision estimation on the received time differences.
4. The method for measuring a terminal position according to claim 1, wherein reporting the measured time differences and the selected reference signal type to the base station comprises:
reporting the measured time differences and the type of the selected reference signal to the base station through a measurement report under the condition that the terminal is accessed to a network;
and under the condition that the terminal is not connected to a network, writing the measured time differences and the type of the selected reference signal into a local cache, and reporting the measured time differences and the type of the selected reference signal to the base station through signaling after the terminal is connected to the network.
5. The method for measuring a terminal position according to any one of claims 1 to 4, wherein the selected reference signal comprises one or any combination of the following: positioning reference signals PRS, cell reference signals and primary and secondary synchronization signals.
6. A method for measuring a terminal position, which is applied to a base station, comprising:
transmitting a plurality of reference signals for the terminal to receive and select at least one of the plurality of reference signals for measuring a time difference;
receiving time differences of arrival of a plurality of adjacent cells sent by the terminal at the terminal and the type of the selected reference signal;
and estimating the position of the terminal according to the received time differences and the type of the selected reference signal.
7. A terminal, comprising:
the measuring module is used for selecting at least one time difference from the received reference signals of the base station and measuring the time difference of the plurality of adjacent cells reaching the terminal by using the selected reference signals;
and the reporting module is used for reporting the measured time differences and the selected reference signal types to the base station, so that the base station can estimate the position of the terminal according to the time differences and the selected reference signal types.
8. A base station, comprising:
a transmitting module, configured to transmit a plurality of reference signals, for a terminal to receive and select at least one of the plurality of reference signals for measuring a time difference;
the receiving module is used for receiving time differences of arrival of a plurality of adjacent cells sent by the terminal to the terminal and the type of the selected reference signal;
and the acquisition module is used for estimating the position of the terminal according to the received time differences and the type of the selected reference signal.
9. An electronic device, comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of measuring a terminal position as claimed in any one of claims 1 to 5 or to perform the method of measuring a terminal position as claimed in claim 6.
10. A computer-readable storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the method of measuring a terminal position according to any one of claims 1 to 5 or implements the method of measuring a terminal position according to claim 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111395424.9A CN116156620A (en) | 2021-11-23 | 2021-11-23 | Terminal position measuring method, terminal, base station, electronic device and storage medium |
| PCT/CN2022/128125 WO2023093453A1 (en) | 2021-11-23 | 2022-10-28 | Method for measuring position of terminal, and terminal, base station, electronic device and storage medium |
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| CN202111395424.9A CN116156620A (en) | 2021-11-23 | 2021-11-23 | Terminal position measuring method, terminal, base station, electronic device and storage medium |
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| US11125850B2 (en) * | 2011-08-03 | 2021-09-21 | Polte Corporation | Systems and methods for determining a timing offset of emitter antennas in a wireless network |
| EP2740303A1 (en) * | 2011-08-05 | 2014-06-11 | Telefonaktiebolaget LM Ericsson (PUBL) | A node and methods therein for enhanced positioning with complementary positioning information |
| CN102573056B (en) * | 2012-01-11 | 2014-12-10 | 电信科学技术研究院 | Method, system and equipment for determining position information |
| WO2020060118A1 (en) * | 2018-09-21 | 2020-03-26 | 엘지전자 주식회사 | Method for transmitting and receiving location reference signal and apparatus therefor |
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