Terminal positioning method, information transmission method, device and network element

Abstract

This invention provides a terminal positioning method, an information transmission method, an apparatus, and a network element. The method includes: when it is determined that the PLMN to which the first terminal to be located belongs is different from the local PLMN, querying a target AMF network element via broadcast. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN; obtaining the area location identifier information of the first network area accessed by the first terminal through the target AMF network element, where the first network area is the area of ​​the local PLMN; obtaining the physical location information of the first network area based on the area location identifier information of the first network area; and obtaining the physical location information of the first terminal based on the physical location information of the first network area. This invention enables the terminal to perform positioning services on the visited network for first terminals roaming across different networks, thereby solving the problem of not being able to obtain the physical location of the terminal in existing designs.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a terminal positioning method, information transmission method, device, and network element. Background Technology

[0002] In existing communication technologies, when a user equipment (UE) accesses a (R)AN via a visited public land mobile network (VPLMN), it reports the network element information of the network it is currently accessing to the local public land mobile network (HPLMN) through the VPLMN's AMF. When it is necessary to locate the UE, the home network HPLMN's HGMLC sends a UE location request query message to both the home network UDM and the visited network VGMLC. After receiving the UE location request query message, the home network UDM and the visited network VGMLC query the location information from the visited network AMF network element that the UE is currently accessing. However, the location information queried by the visited network AMF network element that the UE is currently accessing is the visited network location area and cell information corresponding to the current UE, and cannot obtain the UE's physical location information. Summary of the Invention

[0003] The purpose of this invention is to provide a terminal positioning method, information transmission method, device, and network element to solve the problem that existing methods for locating terminals accessing a network cannot obtain the physical location information of the terminal.

[0004] To achieve the above objectives, in a first aspect, the present invention provides a terminal positioning method applied to a UDM network element, comprising:

[0005] When it is determined that the Public Land Mobile Network (PLMN) to which the first terminal to be located belongs is different from the local PLMN, the target Mobility Management Function (AMF) network element is queried by broadcasting. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0006] The first terminal accesses the first network area by obtaining the area location identifier information of the first network area through the target AMF network element, where the first network area is the area of ​​the local PLMN.

[0007] Based on the regional location identifier information of the first network region, obtain the physical location information of the first network region;

[0008] Based on the physical location information of the first network region, the physical location information of the first terminal is obtained.

[0009] Wherein, when it is determined that the Public Land Mobile Network (PLMN) to which the first terminal to be located belongs is different from the local PLMN, querying the target Mobility Management Function (AMF) network element via broadcast includes:

[0010] Broadcast a first request message, which is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN;

[0011] If a first response message is received from the first AMF network element based on the first request message, then the first AMF network element is identified as the target AMF network element.

[0012] The first request message carries the identification information of the first terminal, so that each AMF network element in the local PLMN can query whether it provides services for the first terminal to access the local PLMN based on the identification information of the first terminal.

[0013] The step of obtaining the regional location identifier information of the first terminal accessing the first network area through the target AMF network element includes:

[0014] Send a second request message to the target AMF network element, the second request message being used to request the first terminal to access the regional location information of the local PLMN;

[0015] The target AMF network element receives the area location identifier information of the first terminal accessing the first network area, returned by the second request message.

[0016] Wherein, obtaining the physical location information of the first network region based on the regional location identifier information of the first network region includes:

[0017] A third request message is sent to the base station location database network element. The third request message is used to request the physical location information of the first network area. The third request message carries the regional location identification information of the first network area. The base station location database network element stores the correspondence between the regional location identification information and the physical location information of each network area of ​​the local PLMN.

[0018] The system receives the physical location information of the first network area returned by the base station location database network element. The physical location information of the first network area is determined by the base station location database network element based on the regional location identifier information of the first network area and the correspondence between the regional location identifier information and the physical location information of each network area of ​​the local PLMN.

[0019] Wherein, obtaining the physical location information of the first terminal based on the physical location information of the first network region includes:

[0020] Obtain the wireless signal measurement value between the first terminal and the service base station of the first terminal;

[0021] The physical location information of the first terminal is obtained based on the wireless signal measurement value and the physical location information of the first network area.

[0022] Secondly, the present invention also provides an information transmission method applied to an AMF network element, comprising:

[0023] When the UDM network element queries itself to provide services for the first terminal to access the local public land mobile network (PLMN) via broadcast, it notifies the UDM network element so that the UDM network element can identify the AMF network element as the target AMF network element, and the PLMN to which the first terminal belongs is different from the local PLMN.

[0024] Send the area location identifier information of the first terminal accessing the first network area to the UDM network element, wherein the first network area is the area of ​​the local PLMN.

[0025] The step of notifying the UDM network element when querying via broadcast method through the Unified Data Management (UDM) network element that it is providing services for the first terminal to access the local public land mobile network (PLMN) includes:

[0026] Receive a first request message broadcast by the UDM network element. The first request message is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN.

[0027] Based on the first request message, query whether it provides services for the first terminal to access the local PLMN;

[0028] If so, a first response message is sent to the UDM network element.

[0029] The first request message carries the identification information of the first terminal;

[0030] The step of querying whether it provides services for the first terminal to access the local PLMN according to the first request message includes:

[0031] If the system queries its own storage and finds the identification information of the first terminal, it determines that it is providing services for the first terminal to access the local PLMN.

[0032] If the system does not have the identification information of the first terminal stored, it determines that it is not providing services for the first terminal to access the local PLMN.

[0033] The step of sending the area location identifier information of the first terminal accessing the first network area to the UDM network element includes:

[0034] Receive a second request message sent by the UDM network element, the second request message being used to request the first terminal to access the regional location information of the local PLMN;

[0035] According to the second request message, the UDM network element returns the area location identifier information of the first terminal accessing the first network area.

[0036] Thirdly, the present invention also provides an information transmission method applied to a base station location database network element, comprising:

[0037] The system receives a third request message sent by a UDM network element. The third request message is used to request the physical location information of a first network area. The third request message carries the area location identification information of the first network area. The area location identification information of the first network area is obtained by the UDM network element through a broadcast query to a target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network (PLMN). The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is an AMF network element that provides services for the first terminal to access the local PLMN.

[0038] The physical location information of the first network region is obtained based on the regional location identification information of the first network region and the pre-stored correspondence between the regional location identification information and physical location information of each network region of the local PLMN.

[0039] Send the physical location information of the first network area to the UDM network element.

[0040] Fourthly, the present invention also provides a terminal positioning device, comprising:

[0041] The first processing module is used to query the target mobility management function (AMF) network element by broadcasting when it is determined that the public land mobile network (PLMN) to which the first terminal to be located belongs is different from the local PLMN. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0042] The first acquisition module is used to acquire the regional location identifier information of the first terminal accessing the first network area through the target AMF network element, wherein the first network area is the area of ​​the local PLMN.

[0043] The second acquisition module is used to acquire the physical location information of the first network region based on the regional location identifier information of the first network region.

[0044] The third acquisition module is used to acquire the physical location information of the first network region based on the regional location identifier information of the first network region.

[0045] Fifthly, the present invention also provides an information transmission device, comprising:

[0046] The first notification module is used to notify the UDM network element when the AMF network element queries the unified data management UDM network element via broadcast method to provide services for the first terminal to access the local public land mobile network PLMN, so that the UDM network element determines the AMF network element as the target AMF network element and the PLMN to which the first terminal belongs is different from the local PLMN.

[0047] The first sending module is used to send the area location identification information of the first terminal accessing the first network area to the UDM network element, wherein the first network area is the area of ​​the local PLMN.

[0048] Sixthly, the present invention also provides an information transmission device, comprising:

[0049] The first receiving module is used to receive a third request message sent by a UDM network element. The third request message is used to request the physical location information of a first network area. The third request message carries the area location identification information of the first network area. The area location identification information of the first network area is obtained by the UDM network element through a broadcast query to a target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network (PLMN). The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is an AMF network element that provides services for the first terminal to access the local PLMN.

[0050] The second processing module is used to obtain the physical location information of the first network region based on the regional location identification information of the first network region and the pre-stored correspondence between the regional location identification information and physical location information of each network region of the local PLMN.

[0051] The second sending module is used to send the physical location information of the first network area to the UDM network element.

[0052] In a seventh aspect, the present invention also provides a UDM network element, including a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is configured to perform the following operations:

[0053] When it is determined that the Public Land Mobile Network (PLMN) to which the first terminal to be located belongs is different from the local PLMN, the target Mobility Management Function (AMF) network element is queried by broadcasting. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0054] The first terminal accesses the first network area by obtaining the area location identifier information of the first network area through the target AMF network element, where the first network area is the area of ​​the local PLMN.

[0055] Based on the regional location identifier information of the first network region, obtain the physical location information of the first network region;

[0056] Based on the physical location information of the first network region, the physical location information of the first terminal is obtained.

[0057] Eighthly, the present invention also provides an AMF network element, including a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is configured to perform the following operations:

[0058] When the UDM network element queries itself to provide services for the first terminal to access the local public land mobile network (PLMN) via broadcast, it notifies the UDM network element so that the UDM network element can identify the AMF network element as the target AMF network element, and the PLMN to which the first terminal belongs is different from the local PLMN.

[0059] Send the area location identifier information of the first terminal accessing the first network area to the UDM network element, wherein the first network area is the area of ​​the local PLMN.

[0060] In a ninth aspect, the present invention also provides a base station location database network element, including a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is configured to perform the following operations:

[0061] The system receives a third request message sent by a UDM network element. The third request message is used to request the physical location information of a first network area. The third request message carries the area location identification information of the first network area. The area location identification information of the first network area is obtained by the UDM network element through a broadcast query to a target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network (PLMN). The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is an AMF network element that provides services for the first terminal to access the local PLMN.

[0062] The physical location information of the first network region is obtained based on the regional location identification information of the first network region and the pre-stored correspondence between the regional location identification information and physical location information of each network region of the local PLMN.

[0063] Send the physical location information of the first network area to the UDM network element.

[0064] In a tenth aspect, the present invention also provides a UDM network element, including a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, it implements the terminal positioning method as described in the first aspect above.

[0065] In an eleventh aspect, the present invention also provides an AMF network element, including a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, it implements the information transmission method as described in the second aspect above.

[0066] In a twelfth aspect, the present invention also provides a base station location database network element, including a memory, a processor, and a program stored in the memory and executable on the processor; when the processor executes the program, it implements the information transmission method as described in the third aspect.

[0067] In a thirteenth aspect, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the terminal positioning method as described in the first aspect, or the steps in the information transmission method as described in the second aspect, or the steps in the information transmission method as described in the third aspect.

[0068] The above-described technical solution of the present invention has at least the following beneficial effects:

[0069] In this embodiment of the invention, for the first terminal, when the UDM network element in the visited network determines that the Public Land Mobile Network (PLMN) to which the first terminal belongs is different from the local PLMN, it queries the target Mobility Management Function (AMF) network element via broadcast. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. This allows the UDM network element to quickly identify the AMF network element that provides services for the first terminal to access the local PLMN. Then, the regional location identifier information of the first network area accessed by the first terminal is obtained through the target AMF network element. The first network area is the area of ​​the local PLMN. Based on the regional location identifier information of the first network area, the physical location information of the first network area is obtained. Finally, based on the physical location information of the first network area, the physical location information of the first terminal is obtained. In this way, for the first terminal roaming in different networks, the terminal positioning service can be realized in the visited network, thereby solving the problem that the physical location of the terminal cannot be obtained in the existing design. Attached Figure Description

[0070] Figure 1 A flowchart illustrating the terminal positioning method provided in an embodiment of the present invention;

[0071] Figure 2 This is a schematic flowchart illustrating one of the information transmission methods provided in an embodiment of the present invention;

[0072] Figure 3 This is a second flowchart illustrating the information transmission method provided in an embodiment of the present invention.

[0073] Figure 4 This diagram illustrates the inter-device interaction process provided in an embodiment of the present invention.

[0074] Figure 5 This is a schematic diagram of the modules of the terminal positioning device provided in an embodiment of the present invention;

[0075] Figure 6 This is a schematic diagram of one module of the information transmission device provided in an embodiment of the present invention;

[0076] Figure 7 This is a second schematic diagram of the module of the information transmission device provided in an embodiment of the present invention;

[0077] Figure 8 A schematic diagram illustrating the structure of a UDM network element according to an embodiment of the present invention;

[0078] Figure 9 A schematic diagram showing the structure of the AMF network element in an embodiment of the present invention;

[0079] Figure 10 This is a schematic diagram illustrating the structure of the base station location database network element according to an embodiment of the present invention. Detailed Implementation

[0080] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0081] This invention addresses the problem that existing methods for locating terminals accessing a visited network cannot obtain the physical location information of the terminal, and provides a terminal location method, information transmission method, device, and network element.

[0082] like Figure 1 The diagram shown is a flowchart of a terminal positioning method provided in an embodiment of the present invention. This method is applied to a UDM network element. The method may include:

[0083] Step 101: When it is determined that the Public Land Mobile Network (PLMN) to which the first terminal to be located belongs is different from the local PLMN, the target Mobility Management Function (AMF) network element is queried by broadcasting. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0084] The PLMN to which the first terminal belongs is different from the local PLMN, indicating that for the first terminal, the local PLMN is the visited network that the first terminal accesses, and the first terminal is a roaming terminal in the local PLMN.

[0085] In one possible implementation, determining that the Public Land Mobile Network (PLMN) to which the first terminal requiring location belongs is different from the local PLMN includes:

[0086] S1, Obtain the identification information of the first terminal that needs to be located;

[0087] Optionally, step S1 specifically includes:

[0088] S11, receive a fourth request message sent by the device requesting location service, wherein the fourth request message is used to request the physical location information of the first terminal, and the fourth request message carries the identification information of the first terminal.

[0089] Specifically, step S11 may include: receiving a fourth request message sent by the device requesting location services by calling a third-party application API.

[0090] S2, based on the identification information of the first terminal, determine whether the PLMN to which it belongs is a local PLMN;

[0091] S3, if not, then determine that the PLMN to which the first terminal to be located belongs is different from the local PLMN.

[0092] Since the UDM network element (VUDM network element for the first terminal) does not know which AMF network element in the network provides services for the first terminal to access the local PLMN, this step adds a network-wide broadcast query function to the UDM network element to facilitate quick identification. That is, the target AMF network element is queried by broadcasting. The implementation method can be found in a part of the embodiment.

[0093] Step 102: Obtain the area location identifier information of the first terminal accessing the first network area through the target AMF network element. The first network area is the area of ​​the local PLMN.

[0094] Optionally, the first network area is the first location area of ​​the local PLMN, and the area location identification information of the first network area includes the location area identification code and the cell code. For details of the implementation of this step, please refer to Embodiment 2.

[0095] Step 103: Obtain the physical location information of the first network region based on the regional location identifier information of the first network region.

[0096] Optionally, this step includes: obtaining the physical location information of the first network area through the base station location database network element in the local PLMN based on the regional location identification information of the first network area. For details of its implementation, please refer to Embodiment 3.

[0097] In existing designs, the location information retrieved for a terminal is the location area and cell information of the currently accessed network. This information is not the terminal's physical location information, but rather internal location area and cell parameter information planned by the visited network operator during network design. Since the location area and cell parameters planned and designed internally by each operator are their own private data, the corresponding physical location information is not publicly available, and other operators cannot obtain this type of operator-level private data. This location area and cell information only has corresponding physical location information in the base station location database network elements within the visited network. Therefore, the method of this embodiment utilizes the base station location database network elements in the local PLMN to obtain the physical location information of the first terminal, thereby effectively solving the problem of being unable to obtain the physical location information of a roaming terminal on a different network due to the privacy of operator-internal planning data.

[0098] Step 104: Obtain the physical location information of the first terminal based on the physical location information of the first network area.

[0099] Here, the location information of the first terminal can be obtained based on the physical location information of the first network area and the wireless signal measurement between the first terminal and the serving base station. For details of its implementation, please refer to Embodiment 4.

[0100] Example 1

[0101] In one possible implementation, step 101 of the method of the present invention includes:

[0102] Step 1011: Broadcast the first request message. The first request message is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN.

[0103] It should be noted that the UDM network element broadcasts the first request message to all AMF network elements in the network.

[0104] Step 1012: If a first response message is received from the first AMF network element based on the first request message, then the first AMF network element is identified as the target AMF network element.

[0105] Here, each AMF network element in the local PLMN queries whether it has provided services for the first terminal accessing the local PLMN based on the first request message. If it is determined that it has provided services for the first terminal accessing the local PLMN, it returns the first response message corresponding to the first request message to the UDM; if it has not provided services, it does not perform any processing.

[0106] That is, if the UDM network element receives the first response message corresponding to the first request message, then the first AMF network element that sent the first response message is the target AMF network element.

[0107] Among them, the first AMF network element is one of the AMFs in the entire network.

[0108] Optionally, the first request message carries the identification information of the first terminal, so that each AMF network element in the local PLMN can query whether it provides services for the first terminal to access the local PLMN based on the identification information of the first terminal.

[0109] Example 2

[0110] In one possible implementation, step 102 of the method of the present invention includes:

[0111] Step 1021: Send a second request message to the target AMF network element. The second request message is used to request the first terminal to access the local PLMN's regional location information.

[0112] Step 1022: Receive the area location identifier information of the first terminal accessing the first network area returned by the target AMF network element based on the second request message.

[0113] It should be noted that the target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. The target AMF network element caches relevant information about the first terminal accessing the local PLMN, including the area location identifier information of the first terminal accessing the first network area.

[0114] Example 3

[0115] In one possible implementation, step 103 of the method of the present invention includes:

[0116] Step 1031: Send a third request message to the base station location database network element. The third request message is used to request the physical location information of the first network area. The third request message carries the area location identifier information of the first network area. The base station location database network element stores the correspondence between the area location identifier information and the physical location information of each network area of ​​the local PLMN.

[0117] Here, the base station location database network element is a network element in the local PLMN. For the first terminal, it is the base station location database network element of the visited network.

[0118] Step 1032: Receive the physical location information of the first network area returned by the base station location database network element. The physical location information of the first network area is determined by the base station location database network element based on the regional location identifier information of the first network area and the correspondence between the regional location identifier information and the physical location information of each network area of ​​the local PLMN.

[0119] Here, since the base station location database network element stores the correspondence between the regional location identification information and the physical location information of each network area of ​​the local PLMN, after receiving the regional location identification information of the first network area, the base station location database network element can query the target geographical location information corresponding to the regional location identification information of the first network area in the above correspondence. The target geographical location information is the physical location information of the first network area.

[0120] Example 4

[0121] In one possible implementation, step 104 of the method of the present invention includes:

[0122] Step 1041: Obtain the wireless signal measurement value between the first terminal and the first terminal's serving base station.

[0123] Specifically, the wireless signal measurement value between the first terminal and its serving base station can be obtained by measuring the wireless signal sent from the serving base station to the first terminal.

[0124] Step 1042: Obtain the physical location information of the first terminal based on the wireless signal measurement value and the physical location information of the first network area.

[0125] In an optional embodiment, step 1042 may specifically include: obtaining the distance value and azimuth angle between the first terminal and the serving base station based on the wireless signal measurement value and the physical location information of the first network area; and obtaining the physical location information of the first terminal based on the distance value, azimuth angle and the physical location information of the first network area.

[0126] For example, wireless signal measurements include signal arrival time and signal arrival angle. The signal arrival time can be used to calculate the distance between the first terminal and the serving base station. The signal arrival angle and the geographical location information of the first network area can be used to obtain the directional angle between the first terminal and the serving base station.

[0127] Then, a preset algorithm can be used to calculate the physical location information of the first terminal based on the parameter values ​​in the distance value, direction angle and physical location information of the first network region.

[0128] In this embodiment of the invention, for a first terminal, when a UDM network element in the visited network determines that the Public Land Mobile Network (PLMN) to which the first terminal belongs is different from the local PLMN, it queries a target Mobility Management Function (AMF) network element via broadcast. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. This allows the UDM network element to quickly identify the AMF network element that provides services for the first terminal to access the local PLMN. Then, the regional location identifier information of the first network area accessed by the first terminal is obtained through the target AMF network element. The first network area is the area of ​​the local PLMN. Based on the regional location identifier information of the first network area, the physical location information of the first network area is obtained. Finally, based on the physical location information of the first network area, the physical location information of the first terminal is obtained. In this way, for a first terminal roaming in a different network, the terminal's positioning service can be realized in the visited network, thereby solving the problem that the physical location of the terminal cannot be obtained in the existing design.

[0129] like Figure 2 As shown, this embodiment of the invention also provides an information transmission method, which is applied to an AMF network element. The method specifically includes:

[0130] Step 201: When the UDM network element queries itself for services to provide access to the local public land mobile network (PLMN) for the first terminal through the broadcast method of the unified data management UDM network element, it notifies the UDM network element so that the UDM network element can determine the AMF network element as the target AMF network element, and the PLMN to which the first terminal belongs is different from the local PLMN.

[0131] Here, the AMF network element is a network element in the local PLMN, and for the first terminal, it is the AMF network element of the visited network.

[0132] In one possible implementation, step 201 may include:

[0133] Step 2011: Receive the first request message broadcast by the UDM network element. The first request message is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN.

[0134] Step 2012: Based on the first request message, check whether you are providing services for the first terminal to access the local PLMN.

[0135] Optionally, the first request message carries the identification information of the first terminal; correspondingly, step 2012 may specifically include:

[0136] 1) If the system stores the identification information of the first terminal, it determines that it is providing services for the first terminal to access the local PLMN.

[0137] 2) If the query shows that it does not store the identification information of the first terminal, it is determined that it has not provided services for the first terminal to access the local PLMN.

[0138] It should be noted that when a terminal accesses the network, the corresponding AMF network element caches information about the terminal, including its identification information. Therefore, by checking whether it stores the identification information of the first terminal, it can determine whether it has provided services for the first terminal to access the local PLMN.

[0139] If there is no storage, no processing is performed; if there is storage, proceed to step 2013.

[0140] Step 2013: If yes, send the first response message to the UDM network element.

[0141] Here, the first response message is used to indicate that the AMF network element that sent the first response message to the UDM network element is the target AMF network element.

[0142] Step 202: Send the area location identifier information of the first terminal accessing the first network area to the UDM network element. The first network area is the area of ​​the local PLMN.

[0143] In one possible implementation, step 201 includes:

[0144] Step 2011: Receive a second request message sent by the UDM network element. The second request message is used to request the first terminal to access the regional location information of the local PLMN.

[0145] Step 2012: Return the area location identifier information of the first terminal accessing the first network area to the UDM network element according to the second request message.

[0146] It should be noted that the target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. The target AMF network element not only caches information about the first terminal, but also caches relevant information about the first terminal accessing the local PLMN. Among the relevant information about the first terminal accessing the local PLMN, there is the area location identifier information of the first terminal accessing the first network area.

[0147] The method of this invention, when querying through the broadcast method of the Unified Data Management (UDM) network element that it provides services for the first terminal to access the local Public Land Mobile Network (PLMN), notifies the UDM network element so that the UDM network element determines the AMF network element as the target AMF network element. The PLMN to which the first terminal belongs is different from the local PLMN. The UDM network element sends the area location identifier information of the first terminal accessing the first network area to the UDM network element. The first network area is the area of ​​the local PLMN. In this way, the area location identifier information of the first terminal accessing the first network area can be queried through the AMF currently accessed by the first terminal roaming in the other network. This provides a basis for the subsequent query of the physical location information of the first network area by the base station location database network element in the local PLMN, and finally realizes the positioning service for the first terminal on the UDM network element side.

[0148] like Figure 3 As shown, this embodiment of the invention also provides an information transmission method, which is applied to a base station location database network element. The method includes:

[0149] Step 301: Receive a third request message sent by the UDM network element. The third request message is used to request the physical location information of the first network area. The third request message carries the area location identifier information of the first network area. The area location identifier information of the first network area is obtained by the UDM network element through a broadcast query to the target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network PLMN. The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0150] Here, the base station location database network element is the base station location database network element in the local PLMN.

[0151] Step 302: Based on the regional location identification information of the first network region and the pre-stored correspondence between the regional location identification information and physical location information of each network region of the local PLMN, the physical location information of the first network region is obtained.

[0152] Since the base station location database network element stores the correspondence between the regional location identification information and the physical location information of each network area of ​​the local PLMN, after receiving the regional location identification information of the first network area, the base station location database network element can query the target geographical location information corresponding to the regional location identification information of the first network area in the above correspondence. The target geographical location information is the physical location information of the first network area.

[0153] Step 303: Send the physical location information of the first network area to the UDM network element.

[0154] Here, the physical location information of the first network area is sent to the UDM network element so that the UDM network element can obtain the physical location information of the first terminal based on the physical location information of the first network area.

[0155] The method of this invention obtains the physical location information of the first network area by querying the correspondence between the regional location identification information and physical location information of each network area of ​​the local PLMN in the received regional location identification information of the first network area, so as to realize the positioning service of the first terminal on the UDM network element side based on the physical location information of the first network area.

[0156] It should be understood that, in the method of this embodiment of the invention, a broadcast message is sent from the UDM network element (also referred to as the VUDM network element) of the visited network (i.e., the local PLMN mentioned in the method of this embodiment of the invention) to the entire AMF network. After determining the AMF network element (i.e., the target AMF network element) currently accessed by the first terminal, the VUDM network element sends a request to the AMF network element currently accessed by the first terminal to obtain the location area and cell information of the network accessed by the first terminal. After obtaining the location area and cell information of the network accessed by the first terminal returned by the AMF network element currently accessed by the first terminal, the VUDM network element sends a request to the base station location database network element of the visited network to query the physical location information corresponding to the location area and cell information of the network accessed by the first terminal. The base station location database network element of the visited network queries the physical location information corresponding to the location area and cell information of the network accessed by the first terminal through the relevant location area and cell corresponding physical location information table stored in this network element, and returns the query result to the VUDM network element. The VUDM network element obtains the physical location information of the first terminal based on the query result and returns the physical location information of the first terminal to the device requesting the location service.

[0157] Below is an example; see [link / reference] Figure 4 The implementation process of the method in the embodiments of the present invention will be explained from the perspective of device interaction.

[0158] The devices involved in this example include UDM network elements, AMF network elements, base station location database network elements, and devices requesting location services.

[0159] Among them, the UDM network element, AMF network element, and base station location database network element are all network elements in the VPLMN. It should be noted that the VPLMN in this example is the visited network relative to the roaming terminal in another network, and is also the local PLMN described in the method of this embodiment of the invention.

[0160] S401, The device requesting location services sends a request for UE location information to the UDM network element. The UE is a roaming UE on a different network.

[0161] S402, UDM network element broadcast request message;

[0162] This request message is used to query the AMF network element currently accessed by the UE (i.e., the target AMF network element). This broadcast message is sent to all AMF network elements in the network. In this example, the AMF network element is the AMF network element currently accessed by the UE. Broadcast messages sent to other AMF network elements are not shown.

[0163] S403, the AMF network element returns a response message to the UDM network element;

[0164] S404, the UDM network element sends a request for location information to the AMF network element;

[0165] S405, the AMF network element returns the location area and cell information of the UE accessing the network to the UDM network element;

[0166] S406, the UDM network element sends a request to the base station location database network element for the physical location information corresponding to the location area and cell information of the UE accessing the network;

[0167] S407, The base station location database network element returns the physical location information corresponding to the location area and cell information of the UE accessing the network to the UDM network element;

[0168] S408, the UDM network element returns the UE's physical location information to the device requesting the location service.

[0169] Here, after receiving the physical location information corresponding to the location area and cell information of the UE access network returned by the base station location database network element, the UDM network element calculates the UE physical location information based on this.

[0170] The method of this invention adds a network-wide broadcast query function to the VUDM network element of the network to which the UE is currently roaming, enabling the query of the AMF network element currently accessed by UEs outside the local network; by querying the location area and cell information of the UE's access network through the AMF network element currently accessed by the UE outside the local network, and querying the physical location information corresponding to the location area and cell information of the UE's access network in the base station location database network element of the local network, the VUDM network element obtains the physical location information of the UE based on the physical location information corresponding to the location area and cell information of the UE's access network, thereby realizing terminal positioning service and solving the problem that the physical location information of UEs roaming in other networks cannot be obtained due to the privacy of internal planning data of operators.

[0171] To better achieve the above objectives, such as Figure 5 As shown, embodiments of the present invention also provide a terminal positioning device, comprising:

[0172] The first processing module 501 is used to query the target mobility management function (AMF) network element by broadcasting when it is determined that the public land mobile network (PLMN) to which the first terminal to be located belongs is different from the local PLMN. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0173] The first acquisition module 502 is used to acquire the area location identifier information of the first terminal accessing the first network area through the target AMF network element, wherein the first network area is the area of ​​the local PLMN.

[0174] The second acquisition module 503 is used to acquire the physical location information of the first network region based on the regional location identifier information of the first network region.

[0175] The third acquisition module 504 is used to acquire the physical location information of the first network region based on the regional location identifier information of the first network region.

[0176] Optionally, the first processing module 501 includes:

[0177] The broadcast unit is used to broadcast a first request message, which is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN.

[0178] The first processing unit is configured to identify the first AMF network element as the target AMF network element when it receives the first response message returned by the first AMF network element based on the first request message.

[0179] Optionally, the first request message carries the identification information of the first terminal, so that each AMF network element in the local PLMN can query whether it provides services for the first terminal to access the local PLMN based on the identification information of the first terminal.

[0180] Optionally, the first acquisition module 502 includes:

[0181] The first sending unit is used to send a second request message to the target AMF network element. The second request message is used to request the first terminal to access the area location information of the local PLMN.

[0182] The first receiving unit is used to receive the area location identification information of the first terminal accessing the first network area returned by the target AMF network element based on the second request message.

[0183] Optionally, the second acquisition module 503 includes:

[0184] The second sending unit is used to send a third request message to the base station location database network element. The third request message is used to request the physical location information of the first network area. The third request message carries the area location identification information of the first network area. The base station location database network element stores the correspondence between the area location identification information and the physical location information of each network area of ​​the local PLMN.

[0185] The second receiving unit is used to receive the physical location information of the first network area returned by the base station location database network element. The physical location information of the first network area is determined by the base station location database network element based on the regional location identifier information of the first network area and the correspondence between the regional location identifier information and the physical location information of each network area of ​​the local PLMN.

[0186] Optionally, the third acquisition module 504 includes:

[0187] The first acquisition unit is used to acquire wireless signal measurement values ​​between the first terminal and the first terminal's serving base station.

[0188] The second processing unit is used to obtain the physical location information of the first terminal based on the wireless signal measurement value and the physical location information of the first network area.

[0189] In this embodiment of the terminal positioning device, for a first terminal, when a UDM network element in the visited network determines that the Public Land Mobile Network (PLMN) to which the first terminal belongs is different from the local PLMN, it queries a target Mobility Management Function (AMF) network element via broadcast. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. This allows the UDM network element to quickly identify the AMF network element that provides services for the first terminal to access the local PLMN. Then, it obtains the area location identifier information of the first network area accessed by the first terminal through the target AMF network element. The first network area is the area of ​​the local PLMN. Based on the area location identifier information of the first network area, it obtains the physical location information of the first network area. Finally, based on the physical location information of the first network area, it obtains the physical location information of the first terminal. In this way, for a first terminal roaming in a different network, the terminal positioning service can be realized in the visited network, thereby solving the problem that the physical location of the terminal cannot be obtained in the existing design.

[0190] like Figure 6 As shown, embodiments of the present invention also provide an information transmission device, comprising:

[0191] The first notification module 601 is used to notify the UDM network element when the AMF network element queries the unified data management UDM network element via broadcast method to provide services for the first terminal to access the local public land mobile network PLMN, so that the UDM network element can determine the AMF network element as the target AMF network element and the PLMN to which the first terminal belongs is different from the local PLMN.

[0192] The first sending module 602 is used to send the area location identification information of the first terminal accessing the first network area to the UDM network element, wherein the first network area is the area of ​​the local PLMN.

[0193] Optionally, the first notification module 601 includes:

[0194] The third receiving unit is used to receive the first request message broadcast by the UDM network element. The first request message is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN.

[0195] The first query unit is used to query whether it provides services for the first terminal to access the local PLMN based on the first request message.

[0196] The third sending unit is used to query whether it provides services for the first terminal to access the local PLMN and to send a first response message to the UDM network element.

[0197] Optionally, the first request message carries the identification information of the first terminal; correspondingly, the first query unit is specifically used for:

[0198] If the system queries its own storage and finds the identification information of the first terminal, it determines that it is providing services for the first terminal to access the local PLMN.

[0199] If the system does not store the identifier information of the first terminal, it determines that it is not providing services for the first terminal to access the local PLMN.

[0200] Optionally, the first transmitting module 602 includes:

[0201] The fourth receiving unit is used to receive a second request message sent by the UDM network element. The second request message is used to request the first terminal to access the local PLMN's regional location information.

[0202] The fourth sending unit is used to return the area location identification information of the first terminal accessing the first network area to the UDM network element according to the second request message.

[0203] In this embodiment of the invention, when the information transmission device queries its own service for a first terminal to access the local public land mobile network (PLMN) via a broadcast method of a unified data management (UDM) network element, it notifies the UDM network element so that the UDM network element determines the AMF network element as the target AMF network element. Since the PLMN to which the first terminal belongs is different from the local PLMN, the device sends the area location identifier information of the first terminal accessing the first network area to the UDM network element. The first network area is the area of ​​the local PLMN. In this way, the area location identifier information of the first terminal accessing the first network area can be queried through the AMF currently accessed by the first terminal roaming in the other network. This provides a basis for the subsequent query of the physical location information of the first network area by the base station location database network element in the local PLMN, and finally realizes the positioning service for the first terminal on the UDM network element side.

[0204] like Figure 7 As shown, embodiments of the present invention also provide an information transmission device, comprising:

[0205] The first receiving module 701 is used to receive a third request message sent by a UDM network element. The third request message is used to request the physical location information of the first network area. The third request message carries the area location identification information of the first network area. The area location identification information of the first network area is obtained by the UDM network element through a broadcast query to the target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network PLMN. The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0206] The second processing module 702 is used to obtain the physical location information of the first network area based on the area location identification information of the first network area and the pre-stored correspondence between the area location identification information and physical location information of each network area of ​​the local PLMN.

[0207] The second sending module 703 is used to send the physical location information of the first network area to the UDM network element.

[0208] The information transmission device of this invention obtains the physical location information of the first network area by querying the correspondence between the regional location identification information and physical location information of each network area of ​​the local PLMN in the pre-stored regional location identification information of the first network area through the received regional location identification information of the first network area, so as to realize the positioning service of the first terminal based on the physical location information of the first network area on the UDM network element side.

[0209] The information transmission device of this invention obtains the physical location information of the first network area by querying the correspondence between the regional location identification information and physical location information of each network area of ​​the local PLMN in the pre-stored regional location identification information of the first network area through the received regional location identification information of the first network area, so as to realize the positioning service of the first terminal based on the physical location information of the first network area on the UDM network element side.

[0210] like Figure 8 As shown, this embodiment of the invention also provides a UDM network element, including a processor 800 and a transceiver 810. The transceiver 810 receives and transmits data under the control of the processor 800, and the processor 800 is used to execute the following process:

[0211] When it is determined that the Public Land Mobile Network (PLMN) to which the first terminal to be located belongs is different from the local PLMN, the target Mobility Management Function (AMF) network element is queried by broadcasting. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0212] The first terminal accesses the first network area by obtaining the area location identifier information of the first network area through the target AMF network element. The first network area is the area of ​​the local PLMN.

[0213] Based on the regional location identifier information of the first network region, obtain the physical location information of the first network region;

[0214] The physical location information of the first terminal is obtained based on the physical location information of the first network area.

[0215] Optionally, the processor 800 is also used for:

[0216] The transceiver 810 broadcasts a first request message, which is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN.

[0217] If a first response message is received from the first AMF network element based on the first request message, then the first AMF network element is identified as the target AMF network element.

[0218] Optionally, the first request message carries the identification information of the first terminal, so that each AMF network element in the local PLMN can query whether it provides services for the first terminal to access the local PLMN based on the identification information of the first terminal.

[0219] Optionally, transceiver 810 is also used for:

[0220] Send a second request message to the target AMF network element. The second request message is used to request the first terminal to access the area location information of the local PLMN.

[0221] The target AMF network element receives the area location identifier information of the first terminal accessing the first network area, returned by the second request message.

[0222] Optionally, transceiver 810 is also used for:

[0223] A third request message is sent to the base station location database network element. The third request message is used to request the physical location information of the first network area. The third request message carries the area location identifier information of the first network area. The base station location database network element stores the correspondence between the area location identifier information and the physical location information of each network area of ​​the local PLMN.

[0224] The system receives the physical location information of the first network area returned by the base station location database network element. The physical location information of the first network area is determined by the base station location database network element based on the regional location identifier information of the first network area and the correspondence between the regional location identifier information and the physical location information of each network area of ​​the local PLMN.

[0225] Optionally, the processor 800 is also used for:

[0226] Obtain the wireless signal measurement values ​​between the first terminal and the first terminal's serving base station;

[0227] The physical location information of the first terminal is obtained based on the wireless signal measurement value and the physical location information of the first network area.

[0228] In this embodiment of the invention, when the UDM network element in the visited network determines that the Public Land Mobile Network (PLMN) to which the first terminal belongs is different from the local PLMN, it queries the target Mobility Management Function (AMF) network element via broadcast. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. This allows the UDM network element to quickly identify the AMF network element that provides services for the first terminal to access the local PLMN. Then, it obtains the area location identifier information of the first network area accessed by the first terminal through the target AMF network element. The first network area is the area of ​​the local PLMN. Based on the area location identifier information of the first network area, it obtains the physical location information of the first network area. Finally, based on the physical location information of the first network area, it obtains the physical location information of the first terminal. In this way, for the first terminal roaming in different networks, the terminal positioning service can be realized in the visited network, thereby solving the problem that the physical location of the terminal cannot be obtained in the existing design.

[0229] like Figure 9 As shown, this embodiment of the invention also provides an AMF network element, including a processor 900 and a transceiver 910. The transceiver 910 receives and transmits data under the control of the processor 900, and the processor 900 is used to execute the following process:

[0230] When the UDM network element queries itself for services to provide access to the local public land mobile network (PLMN) for the first terminal through the broadcast method of the unified data management UDM network element, it notifies the UDM network element so that the UDM network element can determine the AMF network element as the target AMF network element, and the PLMN to which the first terminal belongs is different from the local PLMN.

[0231] Send the area location identifier information of the first terminal accessing the first network area to the UDM network element. The first network area is the area of ​​the local PLMN.

[0232] Optionally, the processor 900 is also used for:

[0233] The transceiver 910 receives the first request message broadcast by the UDM network element. The first request message is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN.

[0234] Based on the first request message, check whether it provides services for the first terminal to access the local PLMN;

[0235] If so, the first response message is sent to the UDM network element via transceiver 910.

[0236] Optionally, the first request message carries the identification information of the first terminal; correspondingly, the processor 900 is further configured to:

[0237] If the system queries its own storage and finds the identification information of the first terminal, it determines that it is providing services for the first terminal to access the local PLMN.

[0238] If the system does not store the identifier information of the first terminal, it determines that it is not providing services for the first terminal to access the local PLMN.

[0239] Optionally, transceiver 910 is also used for:

[0240] Receive a second request message sent by the UDM network element. The second request message is used to request the first terminal to access the area location information of the local PLMN.

[0241] According to the second request message, the UDM network element returns the area location identifier information of the first terminal accessing the first network area.

[0242] In this embodiment of the invention, when the AMF network element queries through the unified data management UDM network element that it is providing services for the first terminal to access the local public land mobile network (PLMN), it notifies the UDM network element so that the UDM network element can identify the AMF network element as the target AMF network element. Since the PLMN to which the first terminal belongs is different from the local PLMN, the AMF network element sends the area location identifier information of the first terminal accessing the first network area to the UDM network element. The first network area is the area of ​​the local PLMN. In this way, the AMF network element currently accessing the first terminal roaming in the other network can query the area location identifier information of the first terminal accessing the first network area. This provides a basis for the base station location database network element in the local PLMN to query the physical location information of the first network area, and finally realizes the positioning service for the first terminal on the UDM network element side.

[0243] like Figure 10 As shown, this embodiment of the invention also provides a base station location database network element, including a processor 1000 and a transceiver 1010. The transceiver 1010 receives and transmits data under the control of the processor 1000, and the processor 1000 is used to execute the following process:

[0244] The transceiver 1010 receives a third request message sent by the UDM network element. The third request message is used to request the physical location information of the first network area. The third request message carries the area location identification information of the first network area. The area location identification information of the first network area is obtained by the UDM network element through a broadcast query to the target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network PLMN. The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN.

[0245] The physical location information of the first network area is obtained based on the regional location identification information of the first network area and the pre-stored correspondence between the regional location identification information and the physical location information of each network area of ​​the local PLMN.

[0246] The transceiver 1010 sends the physical location information of the first network area to the UDM network element.

[0247] In this embodiment of the invention, the base station location database network element queries the pre-stored correspondence between the regional location identifier information and physical location information of each network area of ​​the local PLMN by receiving the regional location identifier information of the first network area, thereby obtaining the physical location information of the first network area. This provides a basis for the subsequent positioning service of the first terminal on the UDM network element side based on the physical location information of the first network area.

[0248] This invention also provides a UDM network element, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the various processes in the terminal positioning method embodiments described above and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0249] This invention also provides an AMF network element, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the various processes in the information transmission method embodiments described above and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0250] This invention also provides a base station location database network element, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the various processes in the information transmission method embodiments described above and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0251] This invention also provides a computer-readable storage medium storing a computer program. When executed by a processor, this program implements the processes described in the method embodiments above and achieves the same technical effects. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0252] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0253] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 A device for one or more processes and / or the functions specified in one or more boxes.

[0254] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce a paper article including an instruction means, the instruction means being implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0255] These computer program instructions can also be loaded onto a computer or other programmable data processing equipment, causing the computer or other programmable equipment to perform a series of operational steps to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0256] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A terminal positioning method applied to a UDM network element, characterized in that, include: When it is determined that the Public Land Mobile Network (PLMN) to which the first terminal to be located belongs is different from the local PLMN, the target Mobility Management Function (AMF) network element is queried by broadcasting. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. The first terminal accesses the first network area by obtaining the area location identifier information of the first network area through the target AMF network element, where the first network area is the area of ​​the local PLMN. Based on the regional location identifier information of the first network region, obtain the physical location information of the first network region; Based on the physical location information of the first network region, the physical location information of the first terminal is obtained.

2. The method of claim 1, wherein, When it is determined that the Public Land Mobile Network (PLMN) to which the first terminal requiring location belongs is different from the local PLMN, the target mobility management function (AMF) network element is queried via broadcast, including: Broadcast a first request message, which is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN; If a first response message is received from the first AMF network element based on the first request message, then the first AMF network element is identified as the target AMF network element.

3. The method according to claim 2, characterized in that, The first request message carries the identification information of the first terminal, so that each AMF network element in the local PLMN can query whether it provides services for the first terminal to access the local PLMN based on the identification information of the first terminal.

4. The method according to claim 1, characterized in that, The step of obtaining the regional location identifier information of the first terminal accessing the first network area through the target AMF network element includes: Send a second request message to the target AMF network element, the second request message being used to request the first terminal to access the regional location information of the local PLMN; The target AMF network element receives the area location identifier information of the first terminal accessing the first network area, returned by the second request message.

5. The method according to claim 1, characterized in that, The step of obtaining the physical location information of the first network region based on the regional location identifier information of the first network region includes: A third request message is sent to the base station location database network element. The third request message is used to request the physical location information of the first network area. The third request message carries the regional location identification information of the first network area. The base station location database network element stores the correspondence between the regional location identification information and the physical location information of each network area of ​​the local PLMN. The system receives the physical location information of the first network area returned by the base station location database network element. The physical location information of the first network area is determined by the base station location database network element based on the regional location identifier information of the first network area and the correspondence between the regional location identifier information and the physical location information of each network area of ​​the local PLMN.

6. The method according to claim 1, characterized in that, The step of obtaining the physical location information of the first terminal based on the physical location information of the first network region includes: Obtain the wireless signal measurement value between the first terminal and the service base station of the first terminal; The physical location information of the first terminal is obtained based on the wireless signal measurement value and the physical location information of the first network area.

7. An information transmission method applied to an AMF network element, characterized in that, include: When the UDM network element queries itself to provide services for the first terminal to access the local public land mobile network (PLMN) via broadcast, it notifies the UDM network element so that the UDM network element can identify the AMF network element as the target AMF network element, and the PLMN to which the first terminal belongs is different from the local PLMN. Send the area location identifier information of the first terminal accessing the first network area to the UDM network element, wherein the first network area is the area of ​​the local PLMN.

8. The method according to claim 7, characterized in that, When the UDM network element queries itself via broadcast to provide services for the first terminal to access the local public land mobile network (PLMN), it notifies the UDM network element, including: Receive a first request message broadcast by the UDM network element. The first request message is used to request the AMF network element to query whether it provides services for the first terminal to access the local PLMN. Based on the first request message, query whether it provides services for the first terminal to access the local PLMN; If so, a first response message is sent to the UDM network element.

9. The method according to claim 8, characterized in that, The first request message carries the identification information of the first terminal; The step of querying whether it provides services for the first terminal to access the local PLMN according to the first request message includes: If the system queries its own storage and finds the identification information of the first terminal, it determines that it is providing services for the first terminal to access the local PLMN. If the system does not have the identification information of the first terminal stored, it determines that it is not providing services for the first terminal to access the local PLMN.

10. The method according to claim 7, characterized in that, Sending the area location identifier information of the first terminal accessing the first network area to the UDM network element includes: Receive a second request message sent by the UDM network element, the second request message being used to request the first terminal to access the regional location information of the local PLMN; According to the second request message, the UDM network element returns the area location identifier information of the first terminal accessing the first network area.

11. An information transmission method applied to a base station location database network element, characterized in that, include: The system receives a third request message sent by a UDM network element. The third request message is used to request the physical location information of a first network area. The third request message carries the area location identification information of the first network area. The area location identification information of the first network area is obtained by the UDM network element through a broadcast query to a target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network (PLMN). The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is an AMF network element that provides services for the first terminal to access the local PLMN. The physical location information of the first network region is obtained based on the regional location identification information of the first network region and the pre-stored correspondence between the regional location identification information and physical location information of each network region of the local PLMN. Send the physical location information of the first network area to the UDM network element.

12. A terminal positioning device, characterized in that, include: The first processing module is used to query the target mobility management function (AMF) network element by broadcasting when it is determined that the public land mobile network (PLMN) to which the first terminal to be located belongs is different from the local PLMN. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. The first acquisition module is used to acquire the regional location identifier information of the first terminal accessing the first network area through the target AMF network element, wherein the first network area is the area of ​​the local PLMN. The second acquisition module is used to acquire the physical location information of the first network region based on the regional location identifier information of the first network region. The third acquisition module is used to acquire the physical location information of the first network region based on the regional location identifier information of the first network region.

13. An information transmission device, characterized in that, include: The first notification module is used to notify the UDM network element when the AMF network element queries the unified data management UDM network element via broadcast method to provide services for the first terminal to access the local public land mobile network PLMN, so that the UDM network element determines the AMF network element as the target AMF network element and the PLMN to which the first terminal belongs is different from the local PLMN. The first sending module is used to send the area location identification information of the first terminal accessing the first network area to the UDM network element, wherein the first network area is the area of ​​the local PLMN.

14. An information transmission device, characterized in that, include: The first receiving module is used to receive a third request message sent by a UDM network element. The third request message is used to request the physical location information of a first network area. The third request message carries the area location identification information of the first network area. The area location identification information of the first network area is obtained by the UDM network element through a broadcast query to a target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network (PLMN). The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is an AMF network element that provides services for the first terminal to access the local PLMN. The second processing module is used to obtain the physical location information of the first network region based on the regional location identification information of the first network region and the pre-stored correspondence between the regional location identification information and physical location information of each network region of the local PLMN. The second sending module is used to send the physical location information of the first network area to the UDM network element.

15. A UDM network element, comprising a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, characterized in that, The processor is used to perform the following operations: When it is determined that the Public Land Mobile Network (PLMN) to which the first terminal to be located belongs is different from the local PLMN, the target Mobility Management Function (AMF) network element is queried by broadcasting. The target AMF network element is the AMF network element that provides services for the first terminal to access the local PLMN. The first terminal accesses the first network area by obtaining the area location identifier information of the first network area through the target AMF network element, where the first network area is the area of ​​the local PLMN. Based on the regional location identifier information of the first network region, obtain the physical location information of the first network region; Based on the physical location information of the first network region, the physical location information of the first terminal is obtained.

16. An AMF network element, comprising a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, characterized in that, The processor is used to perform the following operations: When the UDM network element queries itself to provide services for the first terminal to access the local public land mobile network (PLMN) via broadcast, it notifies the UDM network element so that the UDM network element can identify the AMF network element as the target AMF network element, and the PLMN to which the first terminal belongs is different from the local PLMN. Send the area location identifier information of the first terminal accessing the first network area to the UDM network element, wherein the first network area is the area of ​​the local PLMN.

17. A base station location database network element, comprising a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, characterized in that, The processor is used to perform the following operations: The system receives a third request message sent by a UDM network element. The third request message is used to request the physical location information of a first network area. The third request message carries the area location identification information of the first network area. The area location identification information of the first network area is obtained by the UDM network element through a broadcast query to a target AMF network element. The first network area is the area where the first terminal accesses the local public land mobile network (PLMN). The PLMN to which the first terminal belongs is different from the local PLMN. The target AMF network element is an AMF network element that provides services for the first terminal to access the local PLMN. The physical location information of the first network region is obtained based on the regional location identification information of the first network region and the pre-stored correspondence between the regional location identification information and physical location information of each network region of the local PLMN. Send the physical location information of the first network area to the UDM network element.

18. A UDM network element, comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that, When the processor executes the program, it implements the terminal positioning method as described in any one of claims 1 to 6.

19. An AMF network element, comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that, When the processor executes the program, it implements the information transmission method as described in any one of claims 7 to 10.

20. A base station location database network element, comprising a memory, a processor, and a program stored in the memory and executable on the processor; characterized in that, When the processor executes the program, it implements the information transmission method as described in claim 11.

21. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the terminal positioning method as described in any one of claims 1 to 6, or the steps of the information transmission method as described in any one of claims 7 to 10, or the steps of the information transmission method as described in claim 11.

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