WO2022127503A1

WO2022127503A1 - Positioning method and related device

Info

Publication number: WO2022127503A1
Application number: PCT/CN2021/131405
Authority: WO
Inventors: 刘慧锋; 周润泽
Original assignee: 华为技术有限公司
Priority date: 2020-12-14
Filing date: 2021-11-18
Publication date: 2022-06-23
Also published as: CN114630376A

Abstract

Disclosed in embodiments of the present application are a positioning method and a related device, for use in accurately measuring the location of a UE when the UE is handed over to a target cell. The method of the embodiments of the present application comprises: when a UE is handed over from a source cell to a target cell, a location management network element LMF receives an indication message from an access and mobility management network element AMF, and sends, according to the indication message, a request message to a target base station of which the coverage comprises the target cell, such that the target base station obtains a target measurement signal according to the request message; and the LMF receives the target measurement signal from the target base station, and determines the location of the UE according to the target measurement signal.

Description

A positioning method and related equipment

This application claims the priority of the Chinese patent application with the application number 202011465874.6 and the invention titled "A Positioning Method and Related Equipment" filed with the China Patent Office on December 14, 2020, the entire contents of which are incorporated into this application by reference .

technical field

The embodiments of the present application relate to the field of communications, and in particular, to a positioning method and related devices.

Background technique

In order to locate the user equipment (UE), a current solution is: the base station obtains the measurement signal of the UE, and sends the measurement signal to the location management function (LMF), and the LMF determines the measurement signal according to the measurement signal. The location of the UE.

When the UE leaves the coverage area of the base station, the measurement signal is affected by the long distance between the UE and the base station, or the transmission environment under this distance, and there is a deviation, which cannot truly reflect the location of the UE, resulting in inaccurate positioning of the UE. .

SUMMARY OF THE INVENTION

The embodiment of the present application provides a positioning method for obtaining a target measurement signal through a target base station whose coverage includes the target cell when the UE is handed over to a target cell, so as to accurately measure the position of the UE according to the target measurement signal.

A first aspect of the embodiments of the present application provides a positioning method, and the method includes:

The LMF receives the source measurement signal from the source base station, where the source measurement signal is used to measure the location of the user equipment UE residing in the source cell, and the coverage of the source base station includes the source cell. The LMF receives an indication message from an access and mobility management function (AMF), and the indication message is used to instruct the UE to switch to a target cell, which belongs to the coverage of the target base station. The LMF sends a request message to the target base station, and the request message is used by the target base station to acquire the target measurement signal. The LMF receives the target measurement signal from the target base station, and the target measurement signal is used to measure the position of the UE camping on the target cell.

In the embodiment of the present application, the LMF determines that the UE is handed over to the target cell according to the instruction message from the AMF, thereby sending a request message to the target base station, and obtaining the target measurement signal according to the request message. The target measurement signal is obtained by the target base station, and represents the transmission state of the reference signal between the UE and the target base station. Since the UE is in the target cell, and the coverage of the target base station includes the target cell, that is, the UE is in the range where the reference signal can be normally transmitted. Within this range, the reference signal can be transmitted normally, and the transmission state of the reference signal will not deviate from the expected transmission state, thereby ensuring the accuracy of positioning.

With reference to the first aspect, in the first implementation of the first aspect of the embodiments of the present application, the request message is used to instruct the target base station to allocate channel sounding reference signal (sounding reference signal, SRS) resources to the UE, and the SRS resources are used for transmission channel sounding The reference signal SRS is used to obtain the target measurement signal through the channel sounding reference signal SRS.

With reference to the first aspect or the first implementation manner of the first aspect, in the second implementation manner of the first aspect of the embodiments of the present application, the indication message carries the identifier of the target cell.

With reference to any one of the first aspect, the first aspect of the first aspect, or the second implementation manner of the first aspect, in the third implementation manner of the first aspect of the embodiments of the present application, the indication message is that the AMF subscribes according to the subscription request The message acquisition, the subscription request message is used to acquire the cell handover information of the UE through the wireless access network (RAN).

In the embodiment of the present application, the AMF obtains the cell handover message of the UE through the RAN according to the subscription request message, and once the RAN determines that the UE switches the cell, it sends the cell handover message to the LMF. When the RAN determines that the UE switches the cell, the LMF does not need to obtain the cell switching message through other devices or channels, and it is the simplest and fastest way to obtain the cell switching message from the RAN.

With reference to any one of the first aspect, the first aspect of the first aspect, or the second implementation manner of the first aspect, in the fourth implementation manner of the first aspect of the embodiments of this application, the UE is determined according to the source measurement signal. In the case of leaving the source cell, the LMF sends a cell request message to the AMF, and the cell request message is used by the AMF to determine the target cell where the UE resides.

In the embodiment of the present application, when the source cell and the target cell are both within the coverage of the same base station, that is, when the source base station is the target base station, the UE switching cell will not cause the base station switching, and the UE switching cannot be obtained through the RAN. to the cell information. The determination of the location of the UE by the LMF enables the UE to obtain information about the cell where the UE resides when the UE moves across cells under the same base station.

With reference to the first aspect and any one of the first aspect of the first aspect to the fourth implementation manner of the first aspect, in the fifth implementation manner of the first aspect of the embodiments of this application, the LMF receives an instruction from the AMF After the message, it further includes: the LMF sends a stop notification to the source base station, where the stop notification is used to instruct the source base station to stop continuously acquiring the measurement signal of the UE.

In the embodiment of the present application, it is determined that the UE is handed over to the target cell, which means that the UE leaves the source cell, and the source base station does not need to acquire the measurement signal of the UE again. The LMF sends a stop notification to the source base station, instructing the source base station to stop continuously acquiring the UE's measurement signal, which can save the computing resources and storage resources occupied by the source base station for acquiring the UE's measurement signal.

With reference to any one of the first aspect, the first aspect of the first aspect to the fifth implementation manner of the first aspect, in the sixth implementation manner of the first aspect of the embodiments of the present application, the source measurement signal includes an arrival time ( At least one of a time of arrival (TOA) signal, a time difference of arrival (TDOA) signal, an angle of arrival (AOA) signal, and a reference signal receiving power (RSRP) signal.

With reference to the first aspect and any one of the first aspect of the first aspect to the sixth implementation manner of the first aspect, in the seventh implementation manner of the first aspect of the embodiment of the present application, the target measurement signal includes the time of arrival TOA At least one of a signal, a time difference of arrival TDOA signal, an angle of arrival AOA signal, and a reference signal received power RSRP signal.

A second aspect of the embodiments of the present application provides a positioning method, and the method includes:

The AMF receives the handover message, and the handover message is used to instruct the user equipment UE to hand over to the target cell. The AMF sends an instruction message to the location management network element LMF. The instruction message is used to instruct the UE to switch to the second cell. The instruction message is used by the LMF to receive the target measurement signal from the target base station. The target measurement signal is used to measure the UE camped on the target cell. location, the coverage of the target base station includes the target cell.

For the beneficial effects of the second aspect of the embodiments of the present application, reference may be made to the first aspect, which will not be repeated here.

With reference to the second aspect, in the first implementation manner of the second aspect of the embodiments of the present application, the request message is used to instruct the target base station to allocate channel sounding reference signal SRS resources for the UE, and the SRS resources are used to transmit the channel sounding reference signal SRS to pass the channel sounding reference signal SRS. The channel sounding reference signal SRS acquires the target measurement signal.

With reference to the second aspect or the first implementation manner of the second aspect, in the second implementation manner of the second aspect of the embodiments of the present application, the indication message carries the identifier of the target cell.

With reference to any one of the second aspect, the first aspect of the second aspect, or the second implementation manner of the second aspect, in the third implementation manner of the second aspect of the embodiments of the present application, before the AMF receives the handover message, the It includes: the AMF sends a subscription request message to the radio access network RAN, and the subscription request message is used to acquire the cell handover information of the UE.

The AMF receiving the handover message includes: the AMF receives a cell handover message from the RAN, where the cell handover message is used to indicate that the UE is handed over to the target cell.

The sending of the indication message by the AMF to the location management network element LMF includes: the AMF sends the indication message to the LMF according to the cell handover message.

With reference to any one of the second aspect, the first aspect of the second aspect, or the second implementation manner of the second aspect, in the fourth implementation manner of the second aspect of the embodiments of the present application, the AMF receiving the handover message includes: the AMF Receive a cell request message from the LMF, where the cell request message is used to determine the cell where the UE resides as the target cell.

With reference to the second aspect and any one of the first to the fourth implementation manner of the second aspect, in the fifth implementation manner of the second aspect of the embodiments of the present application, the indication message is also used for the LMF to send the The source base station sends a stop notification, and the stop notification is used to stop the source base station from continuing to acquire the measurement signal of the UE.

With reference to the second aspect, the first aspect of the second aspect to the fifth implementation manner of the second aspect, in the sixth implementation manner of the second aspect of the embodiments of the present application, the source measurement signal includes the time of arrival TOA At least one of a signal, a time difference of arrival TDOA signal, an angle of arrival AOA signal, and a reference signal received power RSRP signal.

In combination with any one of the second aspect, the first aspect of the second aspect to the sixth implementation manner of the second aspect, in the seventh implementation manner of the second aspect of the embodiment of the present application, the target measurement signal includes the time of arrival TOA At least one of a signal, a time difference of arrival TDOA signal, an angle of arrival AOA signal, and a reference signal received power RSRP signal.

A third aspect of the embodiments of the present application provides a location management network element LMF, including:

a first receiving unit, configured to receive a source measurement signal from a source base station, where the source measurement signal is used to measure the position of a user equipment UE residing in a source cell, where the coverage of the source base station includes the source cell;

a second receiving unit, configured to receive an instruction message from the access and mobility management network element AMF, where the instruction message is used to instruct the UE to switch to a target cell, and the target cell belongs to the coverage of the target base station;

a first sending unit, configured to send a request message to the target base station, where the request message is used by the target base station to acquire a target measurement signal;

a third receiving unit, configured to receive the target measurement signal from the target base station, where the target measurement signal is used to measure the position of the UE residing in the target cell;

The LMF is used to perform the method of the aforementioned first aspect.

A fourth aspect of the embodiments of the present application provides an access and mobility management network element AMF, including:

a fourth receiving unit, configured to receive a handover message, where the handover message is used to instruct the user equipment UE to hand over to the target cell;

a fourth sending unit, configured to send an instruction message to the location management network element LMF, where the instruction message is used to instruct the UE to switch to the second cell, and the instruction message is used for the LMF to receive the target measurement signal from the target base station , the target measurement signal is used to measure the position of the UE camping on the target cell, and the coverage of the target base station includes the target cell.

The LMF is used to perform the method of the aforementioned second aspect.

A fifth aspect of the embodiments of the present application provides a location management network element LMF, including:

processors, memories, input and output devices, and buses;

the processor, the memory, and the input and output devices are connected to the bus;

The processor is used in the method of the aforementioned first aspect.

A sixth aspect of the embodiments of the present application provides an access and mobility management network element AMF, including:

processors, memories, input and output devices, and buses;

The processor is used in the method of the aforementioned second aspect.

A seventh aspect of an embodiment of the present application provides a computer-readable storage medium, where a program is stored in the computer-readable storage medium, and when the computer executes the program, the first aspect or the second aspect described above is executed. method.

An eighth aspect of the embodiments of the present application provides a computer program product. When the computer program product is executed on a computer, the computer executes the method described in the first aspect or the second aspect.

Description of drawings

1 is a schematic diagram of the architecture of a positioning system;

2 is a schematic flowchart of a positioning method provided by an embodiment of the present application;

FIG. 3a is another schematic flowchart of the positioning method provided by the embodiment of the present application;

FIG. 3b is another schematic flowchart of a positioning method provided by an embodiment of the present application;

4 is a schematic structural diagram of a location management network element provided by an embodiment of the present application;

5 is a schematic structural diagram of an access and mobility management network element provided by an embodiment of the present application;

FIG. 6 is another schematic structural diagram of a location management network element provided by an embodiment of the present application;

FIG. 7 is another schematic structural diagram of an access and mobility management network element according to an embodiment of the present application.

Detailed ways

The embodiments of the present application provide a positioning method and related equipment. When a user equipment (UE) is handed over to a target cell, a target measurement signal of the UE is acquired through a target base station whose coverage includes the target cell, so as to obtain a target measurement signal of the UE according to the The target measurement signal accurately measures the position of the UE.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of the architecture of the positioning system. In the case where the UE resides in the first cell, the first base station whose coverage includes the first cell transmits the channel sounding reference signal SRS between the UE and the UE. A base station acquires the transmission state of the channel sounding reference signal SRS, and the transmission state is also referred to as the first measurement signal. The positioning base station sends the first measurement signal to a location management function (LMF), and the LMF determines the positional relationship between the first base station and the UE according to the first measurement signal, thereby determining the position of the UE. AMF is used to transparently transmit information between the base station and the LMF. In this embodiment of the present application, the channel sounding reference signal SRS is also referred to as a reference signal.

When the UE moves away from the first base station, the distance between the UE and the first base station may be greater than the distance that the reference signal can be transmitted normally, resulting in an abnormality in the acquisition of the first measurement signal, thereby affecting the calculation based on the first measurement signal. The accuracy of the positional relationship. For example, when the distance between the UE and the first base station is greater than a certain range, the reference signal cannot be successfully transmitted, so that the first base station cannot receive the reference signal. The first measurement signal at this time is obtained from the noise signal and cannot reflect the Because of the positional relationship between the UE and the first base station, positioning based on the positioning signal will result in an inaccurate positioning result. Or, the distance between the UE and the base station is greater than the distance for the normal transmission of the reference signal, which increases the influence of the environment on the reference signal in the transmission distance. Different transmission states, such as longer transmission time, shift in angle of arrival, and excessive fading of signal strength, result in inaccurate positioning.

In order to solve the above problem, an embodiment of the present application provides a positioning method, which is used for switching a base station for providing a positioning service when the serving cell of the UE changes, so as to achieve accurate positioning.

In this embodiment of the present application, the first base station is also called a source base station, the first measurement signal is also called a source measurement signal, and the first cell is also called a source cell; the second base station is also called a target base station, and the second measurement signal is also called a source cell. Referred to as the target measurement signal, the second cell is also referred to as the target cell.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a positioning method provided by an embodiment of the present application. The process of a positioning method provided by an embodiment of the present application includes:

201. The UE sends a reference signal to a first base station.

When the UE resides in the first cell, in order to locate the UE, the UE needs to send a reference signal to the first base station whose coverage includes the first cell.

In this embodiment, the UE may periodically send the reference signal to the first base station, for example, once every 10 seconds, except for 10 seconds, the sending period may also be other intervals, such as 5 seconds, 12 seconds, etc., here Not limited.

In this embodiment of the present application, the reference signal is used to determine the positional relationship between the UE and the base station, such as the distance between the UE and the base station. In addition to the distance, the reference signal can also be used to determine the relative orientation between the UE and the base station, etc., There is no limitation here.

Specifically, in addition to the periodic sending, the sending manner of the reference signal may also be an event-triggered manner, which is not limited here.

202. The first base station sends a first TOA signal to the LMF.

After receiving the reference signal from the UE, the first base station can obtain the first time of arrival (TOA) signal according to the reference signal, and send the first TOA signal to the LMF.

Specifically, when the reference signals are sent periodically, the first base station may acquire the time when each reference signal arrives at the first base station, generate the first TOA signal according to the time, and send the first TOA signal to the LMF.

In this embodiment of the present application, the first TOA signal is also referred to as the first measurement signal, and the first measurement signal is used to measure the position of the UE camping on the first cell.

In this embodiment of the present application, in addition to the TOA signal, the first measurement signal may also be other types of measurement signals, such as a time difference of arrival (TDOA) signal, an angle of arrival (AOA) signal, or a reference signal The received power (reference signal receiving power, RSRP) signal, etc., is not limited here.

Specifically, the acquisition process of the first measurement signal varies depending on the type of the first measurement signal. Here, only the acquisition process of the TOA signal is taken as an example, and does not limit the acquisition method of the first measurement signal.

203. The LMF determines the location of the UE according to the first TOA signal.

The LMF may determine the distance between the UE and the first base station according to the first TOA signal, thereby determining the position of the UE.

Specifically, the distance between the UE and the first base station may be determined according to the product of the single first TOA signal and the preset rate. In addition to the above manner, the distance between the UE and the first base station may also be determined in other manners, for example, according to the product of the average value of the first TOA signal and the preset rate, etc., which is not limited here.

In this embodiment of the present application, there may be multiple first base stations, and the LMF may determine the location of the UE according to the first measurement signals from different first base stations. For example, the distance between the UE and the different first base stations is determined through the first TOA signals from different first base stations, thereby determining the position of the UE.

In this embodiment of the present application, in addition to the distance between the UE and the multiple first base stations, the position of the UE may also be determined in other ways, such as determining the relative orientation between the UE and the multiple first base stations, etc. Here Not limited.

In this embodiment of the present application, when the first measurement signal is not a TOA signal, the manner of determining the UE location will also be adjusted accordingly. For example, when the first measurement signal is an AOA signal, the connection between the UE and the first base station can be determined according to the first AOA signal, and the azimuth angle relative to the true north direction of the first base station can be used to determine the position of the UE, which is not limited here. .

204. The LMF receives the indication message from the AMF.

The LMF can receive indication messages from the access and mobility management function (AMF). The indication message is used to instruct the UE to switch to the second cell.

Optionally, the indication message may carry the identifier of the second cell.

205. The LMF sends a request message to the second base station.

After receiving the indication message, the LMF can send a request message to the second base station whose coverage includes the second cell, where the request message is used by the second base station to obtain the second measurement signal to determine the location of the UE.

Specifically, the request message is used to request the second base station to allocate channel sounding reference signal (sounding reference signal, SRS) resources for the UE, and the SRS resources are used to transmit the channel sounding reference signal SRS between the UE and the second base station. In this embodiment of the present application, the SRS is also referred to as a reference signal.

206. The UE sends a reference signal to the second base station.

After receiving the request message, the UE can send the reference signal to the second base station.

207. The second base station sends a second TOA signal to the LMF.

After receiving the reference signal from the UE, the second base station can acquire the second TOA signal according to the reference signal, and send the second TOA signal to the LMF.

Specifically, when the reference signals are sent periodically, the second base station may obtain the time when each reference signal arrives at the second base station, generate a second TOA signal according to the time, and send the second TOA signal to the LMF.

In this embodiment of the present application, the second TOA signal is also referred to as a second measurement signal, and the second measurement signal is used to measure the position of the UE camping on the second cell.

In this embodiment of the present application, in addition to the TOA signal, the second measurement signal may also be other types of measurement signals, such as a TDOA signal, an AOA signal, or an RSRP signal, which is not limited here.

208. The LMF determines the location of the UE according to the second TOA signal.

The LMF may determine the distance between the UE and the first base station according to the second TOA signal, thereby determining the location of the UE.

Specifically, for the process of determining the UE position by the LMF according to the second measurement signal, refer to the process in step 203 where the LMF determines the UE position according to the first measurement signal, which will not be repeated here.

209. The LMF sends a stop notification to the first base station.

Optionally, after determining that the UE is handed over to the second cell, the LMF may also send a stop notification to the first base station, where the stop notification is used to stop the first base station from continuing to acquire the measurement signal of the UE.

In this embodiment of the present application, step 209 is optional, and step 209 may not be included in the method. When step 209 is included, step 209 may be performed before any of steps 205 to 208, as long as it is performed after step 204, which is not limited here.

In the embodiment of the present application, the LMF determines that the UE is handed over to the second cell according to the instruction message from the AMF, so as to send a request message to the second base station, and obtain the second measurement signal according to the request message. The second measurement signal is acquired by the second base station, and represents the transmission state of the reference signal between the UE and the second base station. Since the UE is in the second cell and the coverage of the second base station includes the second cell, that is, the UE is in the range where the reference signal can be normally transmitted. Within this range, the reference signal can be transmitted normally, and the transmission state of the reference signal will not deviate from the expected transmission state, thereby ensuring the accuracy of positioning.

In this embodiment of the present application, step 204 may be implemented in two ways. The first is to obtain through a radio access network (RAN), and the other is to obtain from an LMF request. The following two implementations will be discussed. Be explained:

1. Obtained through RAN.

Please refer to FIG. 3a, FIG. 3a is a schematic flowchart of a positioning method provided by an embodiment of the present application, and the schematic flowchart shown in FIG. 3a is an addition and refinement of the steps of the method shown in FIG. 2, including:

301a, the AMF sends a subscription request message to the radio access network RAN.

The AMF may send a subscription request message to the RAN, where the subscription request message is used to obtain a cell handover message of the UE, and the cell handover message is used to indicate a cell to which the UE is handed over.

302a. The RAN sends a cell handover message to the AMF.

When determining that the UE is handed over to the second cell, the RAN sends a cell handover message to the LMF, where the cell handover message indicates that the UE is handed over to the second cell.

303a. The AMF sends an indication message to the LMF.

After receiving the cell handover message, the AMF may send an indication message to the LMF, where the indication message indicates that the UE is handed over to the second cell.

In this embodiment of the present application, step 303a corresponds to step 204 in the embodiment shown in FIG. 2 , and steps 301a and 302a are implemented before step 303a, or in other words, in the example implemented in FIG. 2, steps 301a and 302a may be It can be implemented before any step from step 201 to step 204, as long as it is implemented before step 204, which is not limited here.

2. LMF request acquisition.

Please refer to FIG. 3b. FIG. 3b is a schematic flowchart of a positioning method provided by an embodiment of the present application. The schematic flowchart shown in FIG. 3b is an addition and refinement of the steps of the method shown in FIG. 2, including:

301b. The LMF determines that the UE leaves the first cell according to the first measurement signal.

In step 203, the LMF may determine the location of the UE according to the first measurement signal, and may then determine that the UE leaves the first cell according to the first measurement signal.

Specifically, the LMF determines the location of the UE, and determines whether the location of the UE belongs to the range of the first cell. When the location of the UE does not belong to the range of the first cell, the LMF can determine that the UE leaves the first cell.

302b. The LMF sends a cell request message to the AMF.

When it is determined that the UE leaves the first cell, the LMF can send a cell request message to the AMF, and the cell request message is used by the AMF to determine the cell where the UE resides.

303b. The AMF sends an indication message to the LMF.

The AMF determines that the UE camps on the second cell according to the cell request message, and sends an indication message to the LMF. The indication message indicates that the UE is handed over to the second cell.

In this embodiment of the present application, step 303b corresponds to step 204 in the embodiment shown in FIG. 2 , and steps 301b and 302b are performed before step 303b. In other words, in the example shown in FIG. 2, steps 301b and 302b may Implemented before step 204 and must be implemented after step 203 .

The following describes the location management network element LMF in the embodiment of the present application. Please refer to FIG. 4. FIG. 4 is a schematic structural diagram of a location management network element provided by the embodiment of the present application. A structure of the location management network element LMF includes: A first receiving unit 401 , a second receiving unit 402 , a first sending unit 403 and a third receiving unit 404 .

The first receiving unit 401 is configured to receive a source measurement signal from a source base station, where the source measurement signal is used to measure the position of the user equipment UE residing in the source cell, and the coverage of the source base station includes the source cell;

The second receiving unit 402 is configured to receive an instruction message from the access and mobility management network element AMF, where the instruction message is used to instruct the UE to switch to a target cell, and the target cell belongs to the coverage of the target base station;

a first sending unit 403, configured to send a request message to the target base station, where the request message is used by the target base station to obtain the target measurement signal;

The third receiving unit 404 is configured to receive a target measurement signal from the target base station, where the target measurement signal is used to measure the position of the UE camping on the target cell.

Optionally, in an implementation manner, the indication message carries the identity of the target cell.

Optionally, in an implementation manner, the indication message is obtained by the AMF according to the subscription request message, and the subscription request message is used to obtain the cell handover information of the UE through the radio access network RAN.

Optionally, in an implementation manner, the LMF further includes a second sending unit 405, configured to send a cell request message to the AMF when it is determined according to the source measurement signal that the UE leaves the source cell, and the cell request message is used for the AMF to determine. The target cell where the UE resides.

Optionally, in an implementation manner, the LMF further includes a third sending unit 406, configured to send a stop notification to the source base station, where the stop notification is used to instruct the source base station to stop continuing to acquire the measurement signal of the UE.

Optionally, in an implementation manner, the source measurement signal includes at least one of a time of arrival TOA signal, a time difference of arrival TDOA signal, an angle of arrival AOA signal, and a reference signal received power RSRP signal.

Optionally, in an implementation manner, the target measurement signal includes at least one of a time of arrival TOA signal, a time difference of arrival TDOA signal, an angle of arrival AOA signal, and a reference signal received power RSRP signal.

The location management network element LMF shown in FIG. 4 is used to execute the method in the embodiment shown in the foregoing FIG. 2 , FIG. 3 a or FIG. 3 b .

The following describes the access and mobility management network element AMF in the embodiment of the present application. Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of an access and mobility management network element according to the embodiment of the present application. A structure of the mobility management network element AMF includes: a fourth receiving unit 501 and a fourth sending unit 502 .

a fourth receiving unit 501, configured to receive a handover message, where the handover message is used to instruct a user equipment UE to hand over to a target cell;

The fourth sending unit 502 is configured to send an instruction message to the location management network element LMF, where the instruction message is used to instruct the UE to switch to the second cell, and the instruction message is used for the LMF to receive the target measurement signal from the target base station, and the target measurement signal is used for measurement The location of the UE camping on the target cell, and the coverage of the target base station includes the target cell.

Optionally, in an implementation manner, the AMF further includes a fifth sending unit 503 .

The fifth sending unit 503 is configured to send a subscription request message to the radio access network RAN, where the subscription request message is used to acquire cell handover information of the UE.

The fourth receiving unit 501 is configured to receive a cell handover message from the RAN, where the cell handover message is used to indicate that the UE is handed over to the target cell.

The fourth sending unit 502 is configured to send an indication message to the LMF according to the cell handover message.

Optionally, in an implementation manner, the fourth receiving unit 501 is configured to receive a cell request message from the LMF, where the cell request message is used to determine the cell where the UE resides as the target cell.

Optionally, in an implementation manner, the indication message is further used by the LMF to send a stop notification to the source base station, and the stop notification is used to stop the source base station from continuing to acquire the measurement signal of the UE.

The access and mobility management network element AMF shown in Fig. 5 is used to execute the method in the embodiment shown in Fig. 2, Fig. 3a or Fig. 3b.

6 is a schematic structural diagram of a location management network element provided by an embodiment of the present application, the location management network element 600 may include one or more central processing units (central processing units, CPU) 601 and a memory 605, in the memory 605 There are one or more applications or data stored.

Among them, the memory 605 may be volatile storage or persistent storage. The programs stored in memory 605 may include one or more modules, each of which may include a series of instructions to operate on the location management network element. Furthermore, the central processing unit 601 may be configured to communicate with the memory 605 to execute a series of instruction operations in the memory 605 on the location management network element 600 .

The location management network element 600 may also include one or more power supplies 602, one or more wired or wireless network interfaces 603, one or more input and output interfaces 604, and/or, one or more operating systems, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.

The location management network element 600 may perform the operations performed by the location management network element in the foregoing embodiments shown in FIG. 2 to FIG. 3 b , and details are not described herein again.

FIG. 7 is a schematic structural diagram of an access and mobility management network element AMF provided by an embodiment of the present application. The access and mobility management network element 700 may include one or more CPUs 701 and a memory 705, and the memory 705 stores a one or more applications or data.

Among them, the memory 705 may be volatile storage or persistent storage. Programs stored in memory 705 may include one or more modules, each of which may include a series of instruction operations on access and mobility management network elements. Further, the central processing unit 701 may be configured to communicate with the memory 705 to execute a series of instruction operations in the memory 705 on the access and mobility management network element 700 .

The access and mobility management network element 700 may also include one or more power supplies 702, one or more wired or wireless network interfaces 703, one or more input and output interfaces 704, and/or, one or more operating systems, Such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM and so on.

The access and mobility management network element 700 can perform the operations performed by the access and mobility management network element in the foregoing embodiments shown in FIG. 2 to FIG. 3 b , and details are not repeated here.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which is not repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

Claims

A positioning method, wherein the method is applied to a location management network element LMF, and the method includes:

receiving a source measurement signal from a source base station, where the source measurement signal is used to measure the position of a user equipment UE residing in a source cell, and the coverage of the source base station includes the source cell;

receiving an indication message from the access and mobility management network element AMF, where the indication message is used to instruct the UE to switch to a target cell, and the target cell belongs to the coverage of the target base station;

sending a request message to the target base station, where the request message is used for the target base station to acquire a target measurement signal;

The target measurement signal from the target base station is received, and the target measurement signal is used to measure the position of the UE camping on the target cell.
The method according to claim 1, wherein the indication message carries the identity of the target cell.
The method according to claim 1 or 2, wherein the indication message is obtained by the AMF according to a subscription request message, and the subscription request message is used to obtain cell handover information of the UE through a radio access network (RAN) .
The method according to claim 1 or 2, wherein before the receiving the indication message from the access and mobility management network element AMF, the method further comprises:

When it is determined according to the source measurement signal that the UE leaves the source cell, a cell request message is sent to the AMF, where the cell request message is used by the AMF to determine the target on which the UE resides community.
The method according to any one of claims 1 to 4, wherein after receiving the indication message from the access and mobility management network element AMF, the method further comprises:

Sending a stop notification to the source base station, where the stop notification is used to instruct the source base station to stop continuously acquiring the measurement signal of the UE.
The method according to any one of claims 1 to 5, wherein the source measurement signal comprises at least one of a time of arrival TOA signal, an angle of arrival AOA signal and a reference signal received power RSRP signal;

The target measurement signal includes at least one of the TOA signal, the AOA signal, and the RSRP signal.
A positioning method, characterized in that the method is applied to an access and mobility management network element AMF, and the method includes:

receiving a handover message, where the handover message is used to instruct the user equipment UE to hand over to the target cell;

Send an indication message to the location management network element LMF, where the indication message is used to instruct the UE to switch to the second cell, and the indication message is used by the LMF to receive the target measurement signal from the target base station, and the target measurement signal is used For measuring the position of the UE camping on the target cell, the coverage area of the target base station includes the target cell.
The method according to claim 7, wherein the indication message carries the identity of the target cell.
The method according to claim 7 or 8, wherein before the receiving the handover message, the method further comprises:

sending a subscription request message to the radio access network RAN, where the subscription request message is used to acquire cell handover information of the UE;

The receiving the handover message includes:

receiving a cell handover message from the RAN, the cell handover message being used to indicate that the UE is handed over to the target cell;

The sending an indication message to the location management network element LMF includes:

The indication message is sent to the LMF according to the cell handover message.
The method according to claim 7 or 8, wherein the receiving the handover message comprises:

A cell request message is received from the LMF, where the cell request message is used to determine the cell where the UE resides as the target cell.
The method according to any one of claims 7 to 10, wherein the indication message is further used by the LMF to send a stop notification to the source base station, and the stop notification is used to stop the source base station from continuing Obtain the measurement signal of the UE.
The method according to any one of claims 7 to 11, wherein the source measurement signal comprises at least one of a time of arrival TOA signal, an angle of arrival AOA signal and a reference signal received power RSRP signal;

The target measurement signal includes at least one of the TOA signal, the AOA signal, and the RSRP signal.
A location management network element LMF, wherein the LMF includes:

a first receiving unit, configured to receive a source measurement signal from a source base station, where the source measurement signal is used to measure the position of a user equipment UE residing in a source cell, where the coverage of the source base station includes the source cell;

a second receiving unit, configured to receive an instruction message from the access and mobility management network element AMF, where the instruction message is used to instruct the UE to switch to a target cell, and the target cell belongs to the coverage of the target base station;

a first sending unit, configured to send a request message to the target base station, where the request message is used by the target base station to acquire a target measurement signal;

A third receiving unit, configured to receive the target measurement signal from the target base station, where the target measurement signal is used to measure the position of the UE camping on the target cell.
The LMF according to claim 13, wherein the indication message carries the identifier of the target cell.
The LMF according to claim 13 or 14, wherein the indication message is obtained by the AMF according to a subscription request message, and the subscription request message is used to obtain the cell handover information of the UE through a radio access network RAN .
The LMF according to claim 13 or 14, wherein the LMF further comprises:

a second sending unit, configured to send a cell request message to the AMF when it is determined according to the source measurement signal that the UE leaves the source cell, where the cell request message is used by the AMF to determine the UE the target cell to camp on.
The LMF according to any one of claims 13 to 16, wherein the LMF further comprises:

A third sending unit, configured to send a stop notification to the source base station, where the stop notification is used to instruct the source base station to stop continuously acquiring the measurement signal of the UE.
The LMF according to any one of claims 13 to 17, wherein the source measurement signal comprises at least one of a time of arrival TOA signal, an angle of arrival AOA signal and a reference signal received power RSRP signal;

The target measurement signal includes at least one of the TOA signal, the AOA signal, and the RSRP signal.
An access and mobility management network element AMF, wherein the AMF includes:

a fourth receiving unit, configured to receive a handover message, where the handover message is used to instruct the user equipment UE to hand over to the target cell;

a fourth sending unit, configured to send an instruction message to the location management network element LMF, where the instruction message is used to instruct the UE to switch to the second cell, and the instruction message is used for the LMF to receive the target measurement signal from the target base station , the target measurement signal is used to measure the position of the UE camping on the target cell, and the coverage of the target base station includes the target cell.
The AMF according to claim 19, wherein the indication message carries the identity of the target cell.
The AMF according to claim 19 or 20, wherein the AMF further comprises:

a fifth sending unit, configured to send a subscription request message to the radio access network RAN, where the subscription request message is used to acquire cell handover information of the UE;

The fourth receiving unit is used for:

receiving a cell handover message from the RAN, the cell handover message being used to indicate that the UE is handed over to the target cell;

The fourth sending unit is used for:

The indication message is sent to the LMF according to the cell handover message.
The AMF according to claim 19 or 20, wherein the fourth receiving unit is used for:

A cell request message is received from the LMF, where the cell request message is used to determine the cell where the UE resides as the target cell.
The AMF according to any one of claims 19 to 22, wherein the indication message is further used by the LMF to send a stop notification to the source base station, and the stop notification is used to stop the source base station from continuing Obtain the measurement signal of the UE.
The AMF according to any one of claims 19 to 23, wherein the source measurement signal comprises at least one of a time of arrival TOA signal, an angle of arrival AOA signal and a reference signal received power RSRP signal;

The target measurement signal includes at least one of the TOA signal, the AOA signal, and the RSRP signal.
A location management network element LMF, characterized in that it includes:

processors, memories, input and output devices, and buses;

the processor, the memory, and the input and output devices are connected to the bus;

The processor is adapted to perform the method of any one of claims 1 to 6.
An access and mobility management network element AMF, characterized in that it includes:

processors, memories, input and output devices, and buses;

the processor, the memory, and the input and output devices are connected to the bus;

The processor is adapted to perform the method of any one of claims 7 to 12.
A computer-readable storage medium, wherein a program is stored in the computer-readable storage medium, and when the computer executes the program, the method according to any one of claims 1 to 12 is executed.
A computer program product, characterized in that, when the computer program product is executed on a computer, the computer executes the method according to any one of claims 1 to 12.