WO2022127503A1 - 一种定位方法以及相关设备 - Google Patents

一种定位方法以及相关设备 Download PDF

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Publication number
WO2022127503A1
WO2022127503A1 PCT/CN2021/131405 CN2021131405W WO2022127503A1 WO 2022127503 A1 WO2022127503 A1 WO 2022127503A1 CN 2021131405 W CN2021131405 W CN 2021131405W WO 2022127503 A1 WO2022127503 A1 WO 2022127503A1
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WIPO (PCT)
Prior art keywords
cell
target
signal
base station
message
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PCT/CN2021/131405
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English (en)
French (fr)
Inventor
刘慧锋
周润泽
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华为技术有限公司
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Publication of WO2022127503A1 publication Critical patent/WO2022127503A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a positioning method and related devices.
  • 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.
  • LMF location management function
  • 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. .
  • 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.
  • 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.
  • 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
  • SRS sounding reference signal
  • the reference signal SRS is used to obtain the target measurement signal through the channel sounding reference signal SRS.
  • the indication message carries the identifier of the target cell.
  • 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).
  • RAN wireless access network
  • 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.
  • 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.
  • the UE is determined according to the source measurement signal.
  • 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.
  • the UE switching cell 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.
  • 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.
  • 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.
  • 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.
  • TOA time of arrival
  • TDOA time difference of arrival
  • AOA angle of arrival
  • RSRP reference signal receiving power
  • 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.
  • 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.
  • the indication message carries the identifier of the target cell.
  • the It 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.
  • 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.
  • 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.
  • 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.
  • 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, the memory, and the input and output devices are connected to the bus;
  • 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.
  • the 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.
  • FIG. 1 is a schematic diagram of the architecture of a positioning system
  • FIG. 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.
  • FIG. 4 is a schematic structural diagram of a location management network element provided by an embodiment of the present application.
  • FIG. 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.
  • the embodiments of the present application provide a positioning method and related equipment.
  • a user equipment UE
  • 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.
  • FIG. 1 is a schematic diagram of the architecture of the positioning system.
  • 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.
  • LMF location management function
  • 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.
  • the channel sounding reference signal SRS is also referred to as a reference signal.
  • 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.
  • 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.
  • 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.
  • the first base station is also called a source base station
  • the first measurement signal is also called a source measurement signal
  • the first cell is also called a source cell
  • the second base station is also called a target base station
  • the second measurement signal is also called a source cell.
  • the target measurement signal the second cell is also referred to as the target cell.
  • 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:
  • the UE sends a reference signal to a first base station.
  • the UE 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.
  • 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.
  • 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.
  • the sending manner of the reference signal may also be an event-triggered manner, which is not limited here.
  • the first base station sends a first TOA signal to the LMF.
  • the first base station 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.
  • TOA time of arrival
  • 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.
  • 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.
  • 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
  • TDOA time difference of arrival
  • AOA angle of arrival
  • RSRP reference signal receiving power
  • the acquisition process of the first measurement signal varies depending on the type of the first measurement signal.
  • the acquisition process of the TOA signal is taken as an example, and does not limit the acquisition method of the first measurement signal.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the manner of determining the UE location will also be adjusted accordingly.
  • 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. .
  • 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.
  • the indication message may carry the identifier of the second cell.
  • the LMF sends a request message to the second base station.
  • 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.
  • 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.
  • SRS sounding reference signal
  • the SRS is also referred to as a reference signal.
  • the UE sends a reference signal to the second base station.
  • the UE After receiving the request message, the UE can send the reference signal to the second base station.
  • the second base station sends a second TOA signal to the LMF.
  • the second base station 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • step 203 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.
  • the LMF sends a stop notification to the first base station.
  • 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.
  • step 209 is optional, and step 209 may not be included in the method.
  • 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.
  • 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.
  • 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:
  • 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:
  • 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.
  • the RAN sends a cell handover message to the AMF.
  • the RAN 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.
  • the AMF sends an indication message to the LMF.
  • 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.
  • step 303a corresponds to step 204 in the embodiment shown in FIG. 2
  • 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.
  • 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:
  • the LMF determines that the UE leaves the first cell according to the first measurement signal.
  • 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.
  • 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.
  • the LMF sends a cell request message to the AMF.
  • 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.
  • 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.
  • step 303b corresponds to step 204 in the embodiment shown in FIG. 2 , and steps 301b and 302b are performed before step 303b.
  • steps 301b and 302b may Implemented before step 204 and must be implemented after step 203 .
  • 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.
  • the indication message carries the identity of the target cell.
  • 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.
  • 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 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.
  • 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.
  • 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.
  • 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 .
  • 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.
  • the indication message carries the identity of the target cell.
  • 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.
  • 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.
  • 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 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.
  • 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 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.
  • 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.
  • CPU central processing units
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • 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.
  • 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.
  • 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 .

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Abstract

本申请实施例公开了一种定位方法以及相关设备，用于在UE切换至目标小区的情况下，准确地测量UE的位置。本申请实施例方法包括：在UE从源小区切换至目标小区的情况下，位置管理网元LMF接收来自接入和移动性管理网元AMF的指示消息，并根据指示消息向覆盖范围包括目标小区的目标基站发送请求消息，以使得目标基站根据请求消息获取目标测量信号。LMF接收来自目标基站的目标测量信号，根据目标测量信号确定UE的位置。

Description

一种定位方法以及相关设备
本申请要求于2020年12月14日提交中国专利局、申请号为202011465874.6、发明名称为“一种定位方法以及相关设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信领域，尤其涉及一种定位方法以及相关设备。
背景技术
为了实现对用户设备(user equipment，UE)的定位，目前一种方案为：基站获取UE的测量信号，并将测量信号发送给位置管理网元(location management function，LMF)，LMF根据测量信号确定UE的位置。
在UE离开基站的覆盖范围的情况下，测量信号受到UE与基站之间过长的距离，或者该距离下传输环境的影响，出现偏差，无法真实反映UE的位置，导致对UE的定位不准确。
发明内容
本申请实施例提供了一种定位方法，用于在UE切换至目标小区的情况下，通过覆盖范围包括目标小区的目标基站，获取目标测量信号，从而根据目标测量信号准确地测量UE的位置。
本申请实施例第一方面提供了一种定位方法，该方法包括：
LMF接收来自源基站的源测量信号，源测量信号用于测量驻留在源小区的用户设备UE的位置，源基站的覆盖范围包括源小区。LMF接收来自接入和移动性管理网元(access and mobility management function，AMF)的指示消息，指示消息用于指示UE切换至目标小区，目标小区属于目标基站的覆盖范围。LMF向目标基站发送请求消息，请求消息用于目标基站获取目标测量信号。LMF接收来自目标基站的目标测量信号，目标测量信号用于测量驻留在目标小区的UE的位置。
在本申请实施例中，LMF根据来自AMF的指示消息，确定UE切换至目标小区，从而向目标基站发送请求消息，根据该请求消息获取目标测量信号。目标测量信号是目标基站获取的，表示参考信号在UE与目标基站之间的传输状态。由于UE处于目标小区内，且目标基站的覆盖范围包括目标小区，即UE处于参考信号能正常传输的范围内。在该范围内，参考信号能正常传输，且参考信号的传输状态不会偏离预计的传输状态，从而保证了定位的准确性。
结合第一方面，本申请实施例第一方面的第一种实施方式中，请求消息用于指示目标基站为UE分配信道探测参考信号(sounding reference signal，SRS)资源，SRS资源用于传输信道探测参考信号SRS，以通过信道探测参考信号SRS获取目标测量信号。
结合第一方面或第一方面的第一种实施方式，本申请实施例第一方面的第二种实施方式中，指示消息中携带目标小区的标识。
结合第一方面、第一方面的第一种或第一方面的第二种实施方式中的任一种，本申请实施例第一方面的第三种实施方式中，指示消息为AMF根据订阅请求消息获取，订阅请求消息用于通过无线接入网(wireless access network，RAN)获取UE的小区切换信息。
在本申请实施例中，AMF根据订阅请求消息，通过RAN获取UE的小区切换消息，一旦RAN确定UE切换小区，即向LMF发送小区切换消息。在RAN确定UE切换小区的情况下，LMF不需要通过其他设备或途径获取小区切换消息，对于从RAN获取小区切换消息，是最简单快速的。
结合第一方面、第一方面的第一种或第一方面的第二种实施方式中的任一种，本申请实施例第一方面的第四种实施方式中，在根据源测量信号确定UE离开所述源小区的情况下，LMF向AMF发送小区请求消息，小区请求消息用于AMF确定UE所驻留的目标小区。
在本申请实施例中，在源小区和目标小区同处于同一基站的覆盖范围的情况下，即源基站为目标基站的情况下，UE切换小区不会造成基站的切换，通过RAN无法获取UE切换至的小区信息。通过LMF对UE位置的确定，实现UE在同基站下跨小区移动的情况下，获取UE所驻留的小区信息。
结合第一方面、第一方面的第一种至第一方面的第四种实施方式中的任一种，本申请实施例第一方面的第五种实施方式中，在LMF接收来自AMF的指示消息之后，还包括：LMF向源基站发送停止通知，停止通知用于指示源基站停止继续获取UE的测量信号。
在本申请实施例中，确定UE切换至目标小区，即代表UE离开源小区，不需要源基站再获取UE的测量信号。LMF向源基站发送停止通知，指示源基站停止继续获取UE的测量信号，可以节省源基站获取UE的测量信号所占用的运算资源和存储资源。
结合第一方面、第一方面的第一种至第一方面的第五种实施方式中的任一种，本申请实施例第一方面的第六种实施方式中，源测量信号包括到达时间(time of arrival，TOA)信号、到达时差(time difference of arrival，TDOA)信号、到达角度(angle of arrival，AOA)信号和参考信号接收功率(reference signal receiving power，RSRP)信号中的至少一项。
结合第一方面、第一方面的第一种至第一方面的第六种实施方式中的任一种，本申请实施例第一方面的第七种实施方式中，目标测量信号包括到达时间TOA信号、到达时差TDOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项。
本申请实施例第二方面提供了一种定位方法，该方法包括：
AMF接收切换消息，切换消息用于指示用户设备UE切换至目标小区。AMF向位置管理网元LMF发送指示消息，指示消息用于指示UE切换至第二小区，指示消息用于LMF接收来自目标基站的目标测量信号，目标测量信号用于测量驻留在目标小区的UE的位置，目标基站的覆盖范围包括目标小区。
本申请实施例第二方面的有益效果参见第一方面，此处不做赘述。
结合第二方面，本申请实施例第二方面的第一种实施方式中，请求消息用于指示目标基站为UE分配信道探测参考信号SRS资源，SRS资源用于传输信道探测参考信号SRS，以通过信道探测参考信号SRS获取目标测量信号。
结合第二方面或第二方面的第一种实施方式，本申请实施例第二方面的第二种实施方式中，指示消息中携带目标小区的标识。
结合第二方面、第二方面的第一种或第二方面的第二种实施方式中的任一种，本申请实施例第二方面的第三种实施方式中，AMF接收切换消息之前，还包括：AMF向无线接入网RAN发送订阅请求消息，订阅请求消息用于获取UE的小区切换信息。
AMF接收切换消息包括：AMF接收来自所述RAN的小区切换消息，小区切换消息用于表示UE切换至目标小区。
AMF向位置管理网元LMF发送指示消息包括：AMF根据小区切换消息，向LMF发送指示消息。
结合第二方面、第二方面的第一种或第二方面的第二种实施方式中的任一种，本申请实施例第二方面的第四种实施方式中，AMF接收切换消息包括：AMF接收来自LMF的小区请求消息，小区请求消息用于确定UE所驻留的小区为目标小区。
结合第二方面、第二方面的第一种至第二方面的第四种实施方式中的任一种，本申请实施例第二方面的第五种实施方式中，指示消息还用于LMF向源基站发送停止通知，停止通知用于停止源基站继续获取UE的测量信号。
结合第二方面、第二方面的第一种至第二方面的第五种实施方式中的任一种，本申请实施例第二方面的第六种实施方式中，源测量信号包括到达时间TOA信号、到达时差TDOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项。
结合第二方面、第二方面的第一种至第二方面的第六种实施方式中的任一种，本申请实施例第二方面的第七种实施方式中，目标测量信号包括到达时间TOA信号、到达时差TDOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项。
本申请实施例第三方面提供了一种位置管理网元LMF，包括：
第一接收单元，用于接收来自源基站的源测量信号，所述源测量信号用于测量驻留在源小区的用户设备UE的位置，所述源基站的覆盖范围包括所述源小区；
第二接收单元，用于接收来自接入和移动性管理网元AMF的指示消息，所述指示消息用于指示所述UE切换至目标小区，所述目标小区属于目标基站的覆盖范围；
第一发送单元，用于向所述目标基站发送请求消息，所述请求消息用于所述目标基站获取目标测量信号；
第三接收单元，用于接收来自所述目标基站的所述目标测量信号，所述目标测量信号用于测量驻留在所述目标小区的所述UE的位置；
该LMF用于执行前述第一方面的方法。
本申请实施例第四方面提供了一种接入和移动性管理网元AMF，包括：
第四接收单元，用于接收切换消息，所述切换消息用于指示用户设备UE切换至目标小区；
第四发送单元，用于向位置管理网元LMF发送指示消息，所述指示消息用于指示所述UE切换至第二小区，所述指示消息用于所述LMF接收来自目标基站的目标测量信号，所述目标测量信号用于测量驻留在所述目标小区的所述UE的位置，所述目标基站的覆盖范围包 括所述目标小区。
该LMF用于执行前述第二方面的方法。
本申请实施例第五方面提供了一种位置管理网元LMF，包括：
处理器、存储器、输入输出设备以及总线；
所述处理器、存储器、输入输出设备与所述总线相连；
所述处理器用于前述第一方面的方法。
本申请实施例第六方面提供了一种接入和移动性管理网元AMF，包括：
处理器、存储器、输入输出设备以及总线；
所述处理器、存储器、输入输出设备与所述总线相连；
所述处理器用于前述第二方面的方法。
本申请实施例第七方面提供了一种计算机可读存储介质，该计算机可读存储介质中保存有程序，当所述计算机执行所述程序时，执行前述第一方面或第二方面所述的方法。
本申请实施例第八方面提供了一种计算机程序产品，当该计算机程序产品在计算机上执行时，所述计算机执行前述第一方面或第二方面所述的方法。
附图说明
图1为定位***的架构示意图；
图2为本申请实施例提供的定位方法的一个流程示意图；
图3a为本申请实施例提供的定位方法的另一流程示意图；
图3b为本申请实施例提供的定位方法的另一流程示意图；
图4为本申请实施例提供的位置管理网元的一个结构示意图；
图5为本申请实施例提供的接入和移动性管理网元的一个结构示意图；
图6为本申请实施例提供的位置管理网元的另一结构示意图；
图7为本申请实施例提供的接入和移动性管理网元的另一结构示意图。
具体实施方式
本申请实施例提供了一种定位方法以及相关设备，在用户设备(user equipment，UE)切换至目标小区的情况下，通过覆盖范围包括目标小区的目标基站，获取UE的目标测量信号，从而根据目标测量信号准确地测量UE的位置。
请参阅图1，图1为定位***的架构示意图，在UE驻留在第一小区的情况下，在覆盖范围包括第一小区的第一基站，与UE之间传输信道探测参考信号SRS，第一基站获取信道探测参考信号SRS的传输状态，该传输状态也称为第一测量信号。定位基站将第一测量信号发送给位置管理网元(location management function，LMF)，LMF根据第一测量信号确定第一基站与UE之间的位置关系，从而确定UE的位置。AMF用于透传基站与LMF之间的信息。在本申请实施例中，信道探测参考信号SRS也称为参考信号。
当UE移动并远离第一基站时，UE与第一基站之间的距离可能会大于参考信号能正常传输的距离，导致第一测量信号的获取出现异常，从而影响根据第一测量信号计算出的位 置关系的准确性。例如，UE与第一基站之间的距离大于一定范围后，参考信号无法成功传输，导致第一基站无法接收到参考信号，此时的第一测量信号为根据噪声信号所获取的，并不能反映UE与第一基站之间的位置关系，因此根据该定位信号进行定位，就会造成定位结果不准确。或者，UE与基站之间的距离大于参考信号正常传输的距离，增加了传输路程中环境对参考信号的影响，例如参考信号经过过多的折射、衍射等，导致参考信号的传输状态与预计的传输状态不同，例如传输时间加长、到达角度偏移、信号强度过度衰落等，从而造成定位不准确。
为了解决上述问题，本申请实施例提供了一种定位方法，用于在UE的服务小区变化的情况下，切换用于提供定位服务的基站，实现准确的定位。
在本申请实施例中，第一基站也称为源基站，第一测量信号也称为源测量信号，第一小区也称为源小区；第二基站也称为目标基站，第二测量信号也称为目标测量信号，第二小区也称为目标小区。
请参阅图2，图2为本申请实施例提供的一种定位方法的流程示意图，本申请实施例提供的一种定位方法，其流程包括：
201、UE向第一基站发送参考信号。
在UE驻留在第一小区内的情况下，为了对UE进行定位，需要UE向覆盖范围包括第一小区的第一基站发送参考信号。
在本实施例中，UE可以向第一基站周期性地发送参考信号，例如，每隔10秒发送一次，除了10秒，发送周期也可以是其他间隔，例如5秒、12秒等，此处不作限定。
在本申请实施例中，参考信号用于确定UE与基站之间的位置关系，例如UE与基站之间的距离，除了距离，参考信号还可以用于确定UE与基站之间的相对方位等，此处不作限定。
具体的，除了周期性发送，参考信号的发送方式也可以是事件触发等方式，此处不作限定。
202、第一基站向LMF发送第一TOA信号。
第一基站接收到来自UE的参考信号，就可以根据参考信号获取第一到达时间(time of arrival，TOA)信号，并向LMF发送第一TOA信号。
具体的，在参考信号是周期性发送的情况下，第一基站可以获取每个参考信号到达第一基站的时间，根据该时间生成第一TOA信号，并向LMF发送第一TOA信号。
在本申请实施例中，第一TOA信号也称为第一测量信号，第一测量信号用于测量驻留在第一小区的UE的位置。
在本申请实施例中，除了TOA信号，第一测量信号还可以是其他类型的测量信号，例如到达时间差(time difference of arrival，TDOA)信号、到达角度(angle of arrival，AOA)信号或参考信号接收功率(reference signal receiving power，RSRP)信号等，此处不作限定。
具体的，第一测量信号的获取过程，因第一测量信号的种类而异，此处仅以TOA信号的获取过程为例，并不造成对第一测量信号获取方式的限定。
203、LMF根据第一TOA信号确定UE的位置。
LMF可以根据第一TOA信号，确定UE与第一基站之间的距离，从而确定UE的位置。
具体的，可以根据单个第一TOA信号与预设速率的乘积，确定UE与第一基站之间的距离。除了上述方式，也可以通过其他方式确定UE与第一基站之间的距离，例如根据第一TOA信号的平均值与预设速率的乘积确定等，此处不作限定。
在本申请实施例中，第一基站可以有多个，LMF可以根据来自不同第一基站的第一测量信号，确定UE的位置。例如，通过来自不同第一基站的第一TOA信号，确定UE与不同第一基站之间的距离，从而确定UE的位置。
在本申请实施例中，除了通过UE与多个第一基站之间的距离，也可以通过其他方式确定UE的位置，例如通过UE与多个第一基站之间的相对方位确定等，此处不作限定。
在本申请实施例中，当第一测量信号不是TOA信号时，确定UE位置的方式也会做出相应的调整。例如，当第一测量信号为AOA信号时，可以根据第一AOA信号确定UE与第一基站的连线，相对于第一基站正北方向的方位角，从而确定UE的位置，此处不作限定。
204、LMF接收来自AMF的指示消息。
LMF可以接收来自接入和移动性管理网元(access and mobility management function，AMF)的指示消息。指示消息用于指示UE切换至第二小区。
可选的，指示消息中可以携带第二小区的标识。
205、LMF向第二基站发送请求消息。
LMF接收到指示消息，就可以向覆盖范围包括第二小区的第二基站发送请求消息，请求消息用于第二基站获取第二测量信号，以确定UE的位置。
具体的，请求消息用于请求第二基站为UE分配信道探测参考信号(sounding reference signal，SRS)资源，SRS资源用于在UE和第二基站之间传输信道探测参考信号SRS。在本申请实施例中，SRS也称为参考信号。
206、UE向第二基站发送参考信号。
UE接收到请求消息，就可以向第二基站发送参考信号。
207、第二基站向LMF发送第二TOA信号。
第二基站接收到来自UE的参考信号，就可以根据参考信号获取第二TOA信号，并向LMF发送第二TOA信号。
具体的，在参考信号是周期性发送的情况下，第二基站可以获取每个参考信号到达第二基站的时间，根据该时间生成第二TOA信号，并向LMF发送第二TOA信号。
在本申请实施例中，第二TOA信号也称为第二测量信号，第二测量信号用于测量驻留在第二小区的UE的位置。
在本申请实施例中，除了TOA信号，第二测量信号还可以是其他类型的测量信号，例如TDOA信号、AOA信号或RSRP信号等，此处不作限定。
208、LMF根据第二TOA信号确定UE的位置。
LMF可以根据第二TOA信号，确定UE与第一基站之间的距离，从而确定UE的位置。
具体的，LMF根据第二测量信号确定UE位置的过程，参见步骤203中，LMF根据第一 测量信号确定UE位置的过程，此处不做赘述。
209、LMF向第一基站发送停止通知。
可选的，LMF确定UE切换至第二小区后，还可以向第一基站发送停止通知，停止通知用于停止第一基站继续获取UE的测量信号。
在本申请实施例中，步骤209是可选项，方法中也可以不包括步骤209。当包括步骤209时，步骤209可以在步骤205至步骤208中的任一步之前执行，只要在步骤204之后执行即可，此处不作限定。
在本申请实施例中，LMF根据来自AMF的指示消息，确定UE切换至第二小区，从而向第二基站发送请求消息，根据该请求消息获取第二测量信号。第二测量信号是第二基站获取的，表示参考信号在UE与第二基站之间的传输状态。由于UE处于第二小区内，且第二基站的覆盖范围包括第二小区，即UE处于参考信号能正常传输的范围内。在该范围内，参考信号能正常传输，且参考信号的传输状态不会偏离预计的传输状态，从而保证了定位的准确性。
在本申请实施例中，步骤204可以有两种实现方式，第一种为通过无线接入网(radio access network，RAN)获取，一种为LMF请求获取，接下来将对这两种实现方式进行说明：
1、通过RAN获取。
请参阅图3a，图3a为本申请实施例提供的一种定位方法的流程示意图，图3a所示的流程示意图是对图2所示方法的步骤追加和细化，包括：
301a、AMF向无线接入网RAN发送订阅请求消息。
AMF可以向RAN发送订阅请求消息，订阅请求消息用于获取UE的小区切换消息，小区切换消息用于表示UE切换至的小区。
302a、RAN向AMF发送小区切换消息。
RAN在确定UE切换至第二小区的情况下，向LMF发送小区切换消息，小区切换消息表示UE切换至第二小区。
303a、AMF向LMF发送指示消息。
AMF接收小区切换消息之后，就可以向LMF发送指示消息，指示消息表示UE切换至第二小区。
在本申请实施例中，步骤303a与图2所示实施例的步骤204相对应，步骤301a和步骤302a在步骤303a前实施，或者说，在图2所实施示例中，步骤301a和步骤302a可以在步骤201至步骤204的任一步之前实施，只要在步骤204前实施即可，此处不作限定。
2、LMF请求获取。
请参阅图3b，图3b为本申请实施例提供的一种定位方法的流程示意图，图3b所示的流程示意图是对图2所示方法的步骤追加和细化，包括：
301b、LMF根据第一测量信号确定UE离开第一小区。
步骤203中，LMF可以根据第一测量信号确定UE的位置，就可以根据第一测量信号确定UE离开第一小区。
具体的，LMF确定UE的位置，并确定UE的位置是否属于第一小区的范围。当UE的位 置不属于第一小区的范围，LMF即可确定UE离开第一小区。
302b、LMF向AMF发送小区请求消息。
LMF在确定UE离开第一小区的情况下，即可向AMF发送小区请求消息，小区请求消息用于AMF确定UE所驻留的小区。
303b、AMF向LMF发送指示消息。
AMF根据小区请求消息，确定UE驻留在第二小区，并向LMF发送指示消息。指示消息表示UE切换至第二小区。
在本申请实施例中，步骤303b与图2所示实施例的步骤204相对应，步骤301b和步骤302b在步骤303b前实施，或者说，在图2所实施示例中，步骤301b和步骤302b可以在步骤204之前实施，且必须在步骤203之后实施。
下面对本申请实施例中的位置管理网元LMF进行描述，请参阅图4，图4为本申请实施例提供的一种位置管理网元的结构示意图，位置管理网元LMF的一种结构包括：第一接收单元401、第二接收单元402、第一发送单元403和第三接收单元404。
第一接收单元401，用于接收来自源基站的源测量信号，源测量信号用于测量驻留在源小区的用户设备UE的位置，源基站的覆盖范围包括源小区；
第二接收单元402，用于接收来自接入和移动性管理网元AMF的指示消息，指示消息用于指示UE切换至目标小区，目标小区属于目标基站的覆盖范围；
第一发送单元403，用于向目标基站发送请求消息，请求消息用于目标基站获取目标测量信号；
第三接收单元404，用于接收来自目标基站的目标测量信号，目标测量信号用于测量驻留在目标小区的UE的位置。
可选的，在一种实现方式中，指示消息中携带目标小区的标识。
可选的，在一种实现方式中，指示消息为AMF根据订阅请求消息获取，订阅请求消息用于通过无线接入网RAN获取UE的小区切换信息。
可选的，在一种实现方式中，LMF还包括第二发送单元405，用于在根据源测量信号确定UE离开源小区的情况下，向AMF发送小区请求消息，小区请求消息用于AMF确定UE所驻留的目标小区。
可选的，在一种实现方式中，LMF还包括第三发送单元406，用于向源基站发送停止通知，停止通知用于指示源基站停止继续获取UE的测量信号。
可选的，在一种实现方式中，源测量信号包括到达时间TOA信号、到达时差TDOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项。
可选的，在一种实现方式中，目标测量信号包括到达时间TOA信号、到达时差TDOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项。
图4所示位置管理网元LMF用于执行前述图2、图3a或图3b所示实施例中的方法。
下面对本申请实施例中的接入和移动性管理网元AMF进行描述，请参阅图5，图5为本申请实施例提供的一种接入和移动性管理网元的结构示意图，接入和移动性管理网元AMF的一种结构包括：第四接收单元501和第四发送单元502。
第四接收单元501，用于接收切换消息，切换消息用于指示用户设备UE切换至目标小区；
第四发送单元502，用于向位置管理网元LMF发送指示消息，指示消息用于指示UE切换至第二小区，指示消息用于LMF接收来自目标基站的目标测量信号，目标测量信号用于测量驻留在目标小区的UE的位置，目标基站的覆盖范围包括目标小区。
可选的，在一种实现方式中，指示消息中携带目标小区的标识。
可选的，在一种实现方式中，AMF还包括第五发送单元503。
第五发送单元503，用于向无线接入网RAN发送订阅请求消息，订阅请求消息用于获取UE的小区切换信息。
第四接收单元501用于，接收来自RAN的小区切换消息，小区切换消息用于表示UE切换至目标小区。
第四发送单元502用于，根据小区切换消息，向LMF发送指示消息。
可选的，在一种实现方式中，第四接收单元501用于，接收来自LMF的小区请求消息，小区请求消息用于确定UE所驻留的小区为目标小区。
可选的，在一种实现方式中，指示消息还用于LMF向源基站发送停止通知，停止通知用于停止源基站继续获取UE的测量信号。
可选的，在一种实现方式中，源测量信号包括到达时间TOA信号、到达时差TDOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项。
可选的，在一种实现方式中，目标测量信号包括到达时间TOA信号、到达时差TDOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项。
图5所示接入和移动性管理网元AMF用于执行前述图2、图3a或图3b所示实施例中的方法。
图6是本申请实施例提供的一种位置管理网元的结构示意图，该位置管理网元600可以包括一个或一个以***处理器(central processing units，CPU)601和存储器605，该存储器605中存储有一个或一个以上的应用程序或数据。
其中，存储器605可以是易失性存储或持久存储。存储在存储器605的程序可以包括一个或一个以上模块，每个模块可以包括对位置管理网元中的一系列指令操作。更进一步地，中央处理器601可以设置为与存储器605通信，在位置管理网元600上执行存储器605中的一系列指令操作。
位置管理网元600还可以包括一个或一个以上电源602，一个或一个以上有线或无线网络接口603，一个或一个以上输入输出接口604，和/或，一个或一个以上操作***，例如Windows ServerTM，Mac OS XTM，UnixTM,LinuxTM，FreeBSDTM等。
该位置管理网元600可以执行前述图2至图3b所示实施例中位置管理网元所执行的操作，具体此处不再赘述。
图7是本申请实施例提供的一种接入和移动性管理网元AMF结构示意图，该接入和移动性管理网元700可以包括一个或一个以上CPU701和存储器705，该存储器705中存储有一个或一个以上的应用程序或数据。
其中，存储器705可以是易失性存储或持久存储。存储在存储器705的程序可以包括一个或一个以上模块，每个模块可以包括对接入和移动性管理网元中的一系列指令操作。更进一步地，中央处理器701可以设置为与存储器705通信，在接入和移动性管理网元700上执行存储器705中的一系列指令操作。
接入和移动性管理网元700还可以包括一个或一个以上电源702，一个或一个以上有线或无线网络接口703，一个或一个以上输入输出接口704，和/或，一个或一个以上操作***，例如Windows ServerTM，Mac OS XTM，UnixTM,LinuxTM，FreeBSDTM等。
该接入和移动性管理网元700可以执行前述图2至图3b所示实施例中接入和移动性管理网元所执行的操作，具体此处不再赘述。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的***，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的***，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (28)

  1. 一种定位方法，其特征在于，所述方法应用于位置管理网元LMF，所述方法包括：
    接收来自源基站的源测量信号，所述源测量信号用于测量驻留在源小区的用户设备UE的位置，所述源基站的覆盖范围包括所述源小区；
    接收来自接入和移动性管理网元AMF的指示消息，所述指示消息用于指示所述UE切换至目标小区，所述目标小区属于目标基站的覆盖范围；
    向所述目标基站发送请求消息，所述请求消息用于所述目标基站获取目标测量信号；
    接收来自所述目标基站的所述目标测量信号，所述目标测量信号用于测量驻留在所述目标小区的所述UE的位置。
  2. 根据权利要求1所述的方法，其特征在于，所述指示消息中携带所述目标小区的标识。
  3. 根据权利要求1或2所述的方法，其特征在于，所述指示消息为所述AMF根据订阅请求消息获取，所述订阅请求消息用于通过无线接入网RAN获取所述UE的小区切换信息。
  4. 根据权利要求1或2所述的方法，其特征在于，所述接收来自接入和移动性管理网元AMF的指示消息之前，所述方法还包括：
    在根据所述源测量信号确定所述UE离开所述源小区的情况下，向所述AMF发送小区请求消息，所述小区请求消息用于所述AMF确定所述UE所驻留的所述目标小区。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述接收来自接入和移动性管理网元AMF的指示消息之后，所述方法还包括：
    向所述源基站发送停止通知，所述停止通知用于指示所述源基站停止继续获取所述UE的测量信号。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述源测量信号包括到达时间TOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项；
    所述目标测量信号包括所述TOA信号、所述AOA信号和所述RSRP信号中的至少一项。
  7. 一种定位方法，其特征在于，所述方法应用于接入和移动性管理网元AMF，所述方法包括：
    接收切换消息，所述切换消息用于指示用户设备UE切换至目标小区；
    向位置管理网元LMF发送指示消息，所述指示消息用于指示所述UE切换至第二小区，所述指示消息用于所述LMF接收来自目标基站的目标测量信号，所述目标测量信号用于测量驻留在所述目标小区的所述UE的位置，所述目标基站的覆盖范围包括所述目标小区。
  8. 根据权利要求7所述的方法，其特征在于，所述指示消息中携带所述目标小区的标识。
  9. 根据权利要求7或8所述的方法，其特征在于，所述接收切换消息之前，所述方法还包括：
    向无线接入网RAN发送订阅请求消息，所述订阅请求消息用于获取所述UE的小区切换信息；
    所述接收切换消息包括：
    接收来自所述RAN的小区切换消息，所述小区切换消息用于表示所述UE切换至所述目标小区；
    所述向位置管理网元LMF发送指示消息包括：
    根据所述小区切换消息，向所述LMF发送所述指示消息。
  10. 根据权利要求7或8所述的方法，其特征在于，所述接收切换消息包括：
    接收来自所述LMF的小区请求消息，所述小区请求消息用于确定所述UE所驻留的小区为所述目标小区。
  11. 根据权利要求7至10中任一项所述的方法，其特征在于，所述指示消息还用于所述LMF向所述源基站发送停止通知，所述停止通知用于停止所述源基站继续获取所述UE的测量信号。
  12. 根据权利要求7至11中任一项所述的方法，其特征在于，所述源测量信号包括到达时间TOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项；
    所述目标测量信号包括所述TOA信号、所述AOA信号和所述RSRP信号中的至少一项。
  13. 一种位置管理网元LMF，其特征在于，所述LMF包括：
    第一接收单元，用于接收来自源基站的源测量信号，所述源测量信号用于测量驻留在源小区的用户设备UE的位置，所述源基站的覆盖范围包括所述源小区；
    第二接收单元，用于接收来自接入和移动性管理网元AMF的指示消息，所述指示消息用于指示所述UE切换至目标小区，所述目标小区属于目标基站的覆盖范围；
    第一发送单元，用于向所述目标基站发送请求消息，所述请求消息用于所述目标基站获取目标测量信号；
    第三接收单元，用于接收来自所述目标基站的所述目标测量信号，所述目标测量信号用于测量驻留在所述目标小区的所述UE的位置。
  14. 根据权利要求13所述的LMF，其特征在于，所述指示消息中携带所述目标小区的标识。
  15. 根据权利要求13或14所述的LMF，其特征在于，所述指示消息为所述AMF根据订阅请求消息获取，所述订阅请求消息用于通过无线接入网RAN获取所述UE的小区切换信息。
  16. 根据权利要求13或14所述的LMF，其特征在于，所述LMF还包括：
    第二发送单元，用于在根据所述源测量信号确定所述UE离开所述源小区的情况下，向所述AMF发送小区请求消息，所述小区请求消息用于所述AMF确定所述UE所驻留的所述目标小区。
  17. 根据权利要求13至16中任一项所述的LMF，其特征在于，所述LMF还包括：
    第三发送单元，用于向所述源基站发送停止通知，所述停止通知用于指示所述源基站停止继续获取所述UE的测量信号。
  18. 根据权利要求13至17中任一项所述的LMF，其特征在于，所述源测量信号包括到达时间TOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项；
    所述目标测量信号包括所述TOA信号、所述AOA信号和所述RSRP信号中的至少一项。
  19. 一种接入和移动性管理网元AMF，其特征在于，所述AMF包括：
    第四接收单元，用于接收切换消息，所述切换消息用于指示用户设备UE切换至目标小区；
    第四发送单元，用于向位置管理网元LMF发送指示消息，所述指示消息用于指示所述UE切换至第二小区，所述指示消息用于所述LMF接收来自目标基站的目标测量信号，所述目标测量信号用于测量驻留在所述目标小区的所述UE的位置，所述目标基站的覆盖范围包括所述目标小区。
  20. 根据权利要求19所述的AMF，其特征在于，所述指示消息中携带所述目标小区的标识。
  21. 根据权利要求19或20所述的AMF，其特征在于，所述AMF还包括：
    第五发送单元，用于向无线接入网RAN发送订阅请求消息，所述订阅请求消息用于获取所述UE的小区切换信息；
    所述第四接收单元用于：
    接收来自所述RAN的小区切换消息，所述小区切换消息用于表示所述UE切换至所述目标小区；
    所述第四发送单元用于：
    根据所述小区切换消息，向所述LMF发送所述指示消息。
  22. 根据权利要求19或20所述的AMF，其特征在于，所述第四接收单元用于：
    接收来自所述LMF的小区请求消息，所述小区请求消息用于确定所述UE所驻留的小区为所述目标小区。
  23. 根据权利要求19至22中任一项所述的AMF，其特征在于，所述指示消息还用于所述LMF向所述源基站发送停止通知，所述停止通知用于停止所述源基站继续获取所述UE的测量信号。
  24. 根据权利要求19至23中任一项所述的AMF，其特征在于，所述源测量信号包括到达时间TOA信号、到达角度AOA信号和参考信号接收功率RSRP信号中的至少一项；
    所述目标测量信号包括所述TOA信号、所述AOA信号和所述RSRP信号中的至少一项。
  25. 一种位置管理网元LMF，其特征在于，包括：
    处理器、存储器、输入输出设备以及总线；
    所述处理器、存储器、输入输出设备与所述总线相连；
    所述处理器用于执行权利要求1至6中任一项所述的方法。
  26. 一种接入和移动性管理网元AMF，其特征在于，包括：
    处理器、存储器、输入输出设备以及总线；
    所述处理器、存储器、输入输出设备与所述总线相连；
    所述处理器用于执行权利要求7至12中任一项所述的方法。
  27. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中保存有程序，当所述计算机执行所述程序时，执行如权利要求1至12中任一项所述的方法。
  28. 一种计算机程序产品，其特征在于，当所述计算机程序产品在计算机上执行时，所述计算机执行如权利要求1至12中任一项所述的方法。
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