User plane positioning service method and device, equipment, storage medium and program product

Abstract

The present application relates to a user plane positioning service method, apparatus, device, storage medium and program product, the method comprising: an access and mobility management function (AMF) receives a first non-access stratum (NAS) message sent by a user equipment (UE) for establishing a user plane connection in the case of signaling congestion; further, the AMF performs a signaling process of establishing a user plane connection according to the first NAS message. Visibly, compared with the prior art in which the AMF rejects the NAS message sent by the UE under the condition of NAS-level congestion, in the embodiment of the invention, the AMF executes the signaling process of establishing the user plane connection according to the first NAS message sent by the UE under the condition of signaling congestion, so that the UE can perform the signaling process of establishing the user plane connection according to the first NAS message sent by the UE. According to the embodiment of the invention, the process of switching from control plane transmission to user plane transmission can still be executed under the condition that the AMF is in signaling congestion, so that the realization of transmitting positioning related information through the user plane is facilitated.

Description

Technical Field

[0001] The present application relates to the field of communication technologies, and in particular, to a user plane positioning service method, apparatus, device, storage medium, and program product. Background Art

[0002] Generally, location management function (LMF) and user equipment (UE) transmit location-related information through the control plane. According to the load condition of the device, LMF can decide to switch the control plane transmission to the user plane transmission.

[0003] If the access and mobility management function (AMF) detects non-access stratum (NAS) signaling congestion and may initiate an overload control mechanism, then it will reject the signaling message for establishing the user plane, thus unable to establish the transmission resources of the user plane, and also unable to implement the transmission of location-related information through the user plane. Summary of the Invention

[0004] Embodiments of the present application provide a user plane positioning service method, apparatus, device, storage medium, and program product, which can implement the process of switching from control plane transmission to user plane transmission even when AMF is in signaling congestion, thus facilitating the transmission of location-related information through the user plane.

[0005] In a first aspect, the present application provides a user plane positioning service method, and the method includes:

[0006] When the access and mobility management function (AMF) is in signaling congestion, it receives a first non-access stratum (NAS) message sent by the user equipment (UE), and the first NAS message is used to establish a user plane connection;

[0007] The AMF executes the signaling process for establishing a user plane connection according to the first NAS message.

[0008] In one embodiment, the AMF executes the signaling process for establishing a user plane connection according to the first NAS message, including:

[0009] The AMF determines to accept the first NAS message according to the target information carried in the first NAS message;

[0010] The AMF executes the signaling process for establishing a user plane connection corresponding to the first NAS message according to the first NAS message.

[0011] In one embodiment, the first NAS message includes:

[0012] Uplink NAS transport message;

[0013] Or,

[0014] Protocol data unit (PDU) session establishment request message;

[0015] Or,

[0016] Protocol data unit (PDU) session modification request message.

[0017] In one embodiment, if the first NAS message includes an uplink NAS transport message, the target information includes first indication information, where the first indication information is used to indicate that the AMF accepts the UE's NAS message; or,

[0018] The target information includes user plane positioning confirmation information.

[0019] In one embodiment, the AMF performs a signaling procedure for establishing a user plane connection corresponding to the first NAS message according to the first NAS message, including:

[0020] The AMF sends user plane positioning confirmation information to the Location Management Function (LMF) according to the first NAS message.

[0021] In one embodiment, before receiving the first Non-Access Stratum (NAS) message sent by the User Equipment (UE), the method further includes:

[0022] The AMF sends a second NAS message to the UE, and the second NAS message is used to indicate to the UE to establish a user plane connection.

[0023] In one embodiment, the second NAS message includes second indication information, where the second indication information is used to indicate that the UE determines the first indication information according to the second indication information, and / or the second indication information is used to indicate that the UE determines third indication information according to the second indication information, where the third indication information is used to indicate that the AMF accepts the NAS message sent by the UE.

[0024] In one embodiment, the method further includes:

[0025] The AMF determines the second indication information according to the user plane information and the user context information.

[0026] In one embodiment, the method further includes:

[0027] The AMF receives fourth indication information sent by the LMF;

[0028] The AMF determines the second indication information according to the fourth indication information.

[0029] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the target information includes third indication information; or,

[0030] the target information includes a data network identifier.

[0031] In one embodiment, the AMF performs a signaling procedure for establishing a user plane connection corresponding to the first NAS message according to the first NAS message, including:

[0032] If the first NAS message includes a PDU session establishment request message, the AMF sends a PDU session establishment session context request to the session management function SMF according to the first NAS message; or,

[0033] If the first NAS message includes a PDU session modification request message, the AMF sends a PDU session update session context request to the SMF according to the first NAS message.

[0034] In one embodiment, the method further includes:

[0035] The AMF receives a third NAS message sent by the UE, where the third NAS message is used to indicate that the AMF accepts the first non-access stratum NAS message.

[0036] In one embodiment, the third NAS message includes first indication information, where the first indication information is used to indicate that the AMF accepts the NAS message of the UE.

[0037] In a second aspect, the present application further provides a user plane positioning service method, the method including:

[0038] A user equipment UE sends a first non-access stratum NAS message to an access and mobility management function AMF, where the first NAS message is used to indicate that the AMF performs a signaling procedure for establishing a user plane connection when in a signaling congestion state.

[0039] In one embodiment, the first NAS message includes:

[0040] An uplink NAS transport message;

[0041] Or,

[0042] A protocol data unit PDU session establishment request message;

[0043] Or,

[0044] A protocol data unit PDU session modification request message.

[0045] In one embodiment, if the first NAS message includes an uplink NAS transmission message, the first NAS message includes first indication information, where the first indication information is used to indicate that the AMF accepts the UE's NAS message and performs a signaling procedure for establishing a user plane connection corresponding to the first NAS message.

[0046] In one embodiment, before the user equipment UE sends a first non-access stratum NAS message to the access and mobility management function AMF, the method further includes:

[0047] The UE receives a second NAS message sent by the AMF, where the second NAS message is used to indicate that the UE establishes a user plane connection.

[0048] In one embodiment, the second NAS message includes second indication information, where the second indication information is used to indicate that the UE determines the first indication information according to the second indication information, and / or the second indication information is used to indicate that the UE determines third indication information according to the second indication information, where the third indication information is used to indicate that the AMF accepts the UE's NAS message.

[0049] In one embodiment, the method further includes:

[0050] The UE determines the first indication information according to the user plane information.

[0051] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message includes third indication information, where the third indication information is used to indicate that the AMF accepts the UE's NAS message and performs a signaling procedure for establishing a user plane connection corresponding to the first NAS message.

[0052] In one embodiment, the method further includes:

[0053] The UE determines the third indication information according to the first indication information; or,

[0054] The UE determines the third indication information according to the user plane information.

[0055] In one embodiment, the method further includes:

[0056] The UE sends a third NAS message to the AMF, and the third NAS message is used to indicate that the AMF accepts the first non-access stratum NAS message.

[0057] In one embodiment, the third NAS message includes the first indication information, where the first indication information is used to indicate that the AMF accepts the UE's NAS message.

[0058] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message includes a data network identifier, where the data network identifier is used to indicate that the AMF accepts the UE's NAS message and performs a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0059] In a third aspect, the present application further provides a user plane positioning service device, which is applied to an access and mobility management function AMF. The device includes:

[0060] A receiving module, configured to receive a first non-access stratum NAS message sent by a user equipment UE in a case of signaling congestion, where the first NAS message is used to establish a user plane connection;

[0061] A establishing module, configured to perform a signaling process for establishing a user plane connection according to the first NAS message.

[0062] In a fourth aspect, the present application further provides a user plane positioning service device, which is applied to a user equipment UE. The device includes:

[0063] A sending module, configured to send a first non-access stratum NAS message to an access and mobility management function AMF, where the first NAS message is used to indicate that the AMF performs a signaling process for establishing a user plane connection in a case of signaling congestion.

[0064] In a fifth aspect, the present application further provides an access and mobility management function AMF, including: a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the method according to any one of the first aspect when executing the computer program;

[0065] In a sixth aspect, the present application further provides a user equipment UE, including: a transmitter;

[0066] A transmitter, configured to send a first non-access stratum NAS message to an access and mobility management function AMF, where the first NAS message is used to indicate that the AMF performs a signaling process for establishing a user plane connection in a case of signaling congestion.

[0067] In a seventh aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored, and the computer program implements the steps of the method according to any one of the first aspect or the second aspect when being executed by a processor.

[0068] In an eighth aspect, the present application further provides a computer program product, which includes a computer program, and the computer program implements the steps of the method according to any one of the first aspect or the second aspect when being executed by a processor.

[0069] The above user plane positioning service method, apparatus, device, storage medium and program product receive, by means of an Access and Mobility Management Function (AMF), a first Non-Access Stratum (NAS) message sent by a User Equipment (UE) for establishing a user plane connection when there is signaling congestion. Further, the AMF executes a signaling procedure for establishing a user plane connection according to the first NAS message. It can be seen that, compared with the related art in which the AMF rejects the NAS message sent by the UE when there is NAS-level congestion, in the embodiments of the present application, when there is signaling congestion, the AMF can still execute the process of switching from control plane transmission to user plane transmission by executing the signaling procedure for establishing a user plane connection according to the first NAS message sent by the UE, which is conducive to implementing the transmission of positioning-related information through the user plane. Description of Drawings

[0070] Figure 1 It is a schematic diagram of an application scenario of a user plane positioning service method provided by an embodiment of the present application;

[0071] Figure 2 It is a schematic flowchart of a user plane positioning service method in an embodiment of the present application;

[0072] Figure 3 It is a schematic flowchart of a user plane positioning service method in another embodiment of the present application;

[0073] Figure 4 It is a schematic flowchart of a user plane positioning service method in another embodiment of the present application;

[0074] Figure 5 It is a schematic flowchart of a user plane positioning service method in another embodiment of the present application;

[0075] Figure 6 It is a schematic flowchart of a user plane positioning service method in another embodiment of the present application;

[0076] Figure 7 It is a schematic flowchart of a user plane positioning service method in another embodiment of the present application;

[0077] Figure 8 It is a schematic flowchart of a user plane positioning service method in another embodiment of the present application;

[0078] Figure 9 It is a schematic flowchart of a user plane positioning service method in another embodiment of the present application;

[0079] Figure 10 It is a schematic structural diagram of a user plane positioning service apparatus in an embodiment of the present application;

[0080] Figure 11Schematic structural diagram of the AMF in an embodiment of the present application;

[0081] Figure 12 Schematic structural diagram of the user plane positioning service device in another embodiment of the present application;

[0082] Figure 13 Schematic structural diagram of the UE in an embodiment of the present application. Detailed implementation manners

[0083] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0084] The user plane positioning service method, device, equipment, storage medium and program product provided by the embodiments of the present application can be applied to application scenarios where the positioning service is switched from control plane transmission to user plane transmission. Of course, it can also be applied to other scenarios.

[0085] Figure 1 Schematic diagram of an application scenario of a user plane positioning service method provided by an embodiment of the present application. As Figure 1 shown, this application scenario may include, but is not limited to, UE 10, AMF 11, and LMF 12. Among them, in the case of control plane transmission, the positioning service information needs to be transmitted between UE 10 and LMF 12 through AMF 11; in the case of switching from control plane transmission to user plane transmission, a secure connection may be established between UE 10 and LMF 12 for transmitting messages such as positioning service information.

[0086] Currently, in the 3rd Generation Partnership Project (3GPP) standard, it has been proposed that the LMF can determine whether to transmit the positioning service information through the user plane or through the control plane. If the positioning service message is transmitted between the UE and the LMF through the control plane, the LMF can decide to switch the control plane transmission of the positioning service message to the user plane transmission according to the load condition of the AMF. During the switching process, a secure connection is established between the UE and the LMF through the PDU session, otherwise the switching from control plane transmission to user plane transmission cannot be achieved.

[0087] In the related art, when the AMF detects NAS signaling congestion, it can reject the uplink NAS transport message (or simply referred to as the uplink NAS transport message) sent by the UE, and return a mobility management back-off timer to the UE. Further, the UE starts a timer according to the mobility management back-off timer information, and cannot initiate NAS signaling process messages during the running of the mobility management back-off timer, so that the subsequent process of establishing a secure connection between the UE and the LMF through a PDU session cannot be executed, thus the transmission resources of the user plane cannot be established, and the positioning-related information cannot be transmitted through the user plane. Or, when the AMF is in a NAS signaling congestion state when receiving a protocol data unit (PDU) session establishment request message or a PDU session modification request message sent by the UE, it may reject the PDU session establishment request message or the PDU session modification request message sent by the UE, so that the subsequent handover process cannot be executed, and the positioning-related information cannot be transmitted through the user plane.

[0088] It can be seen that in the related art, when in a NAS signaling congestion state, the process of switching from control plane transmission to user plane transmission usually cannot be normally executed, so that the positioning-related information cannot be transmitted through the user plane.

[0089] It should be noted that the UE can still send NAS messages that are not restricted by congestion control during the running of the mobility management back-off timer, and the AMF cannot reject these NAS messages. Among them, the NAS messages that are not restricted by congestion control may include but are not limited to at least one of the following: emergency service request, high-priority access request, deregistration request message, mobile-terminated service request, initial registration request or mobile periodic registration update request in case of emergency indicated at a lower layer.

[0090] Based on the problem that in the related art, when in a NAS signaling congestion state, the process of switching from control plane transmission to user plane transmission cannot be normally executed, so that the positioning-related information cannot be transmitted through the user plane, the embodiment of the present application provides a user plane positioning service method. The UE sends a first non-access stratum NAS message to the AMF to indicate that the AMF executes the signaling process of establishing a user plane connection when in a signaling congestion state, so that the AMF can execute the signaling process of establishing a user plane connection according to the received first non-access stratum NAS message for establishing a user plane connection when in a signaling congestion state, and it is possible to execute the process of switching from control plane transmission to user plane transmission even when the AMF is in a signaling congestion state, which is beneficial to realizing the transmission of positioning-related information through the user plane.

[0091] It should be noted that the beneficial effects brought by the embodiments of the present application or the technical problems to be solved are not limited to this one, and there may also be other implicit or related problems. For specific details, please refer to the descriptions of the following embodiments.

[0092] The following uses specific embodiments to elaborate in detail on the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0093] In one embodiment, Figure 2 is a schematic flowchart of a user plane positioning service method in an embodiment of the present application. In the embodiment of the present application, this method is applied to Figure 1 the AMF in Figure 2 as an example for illustration. As

[0094] shown, the method of the embodiment of the present application may include the following steps:

[0095] In this step, when the access and mobility management function AMF is in a signaling congestion state, it receives a first non-access stratum NAS message sent by the user equipment UE.

[0096] In this step, when the AMF is in a signaling congestion state, it receives a first non-access stratum NAS message. The first NAS message can be used to establish a user plane connection.

[0097] Exemplarily, the first NAS message can be used to instruct the AMF to execute a signaling process for establishing a user plane connection when it is in a signaling congestion state, so that even when the AMF receives the first NAS message and is in a signaling congestion state, it still continues to execute the signaling process for establishing a user plane connection.

[0098] Exemplarily, the first NAS message may include, but is not limited to: an uplink NAS transmission message; or, a protocol data unit PDU session establishment request message; or, a protocol data unit PDU session modification request message.

[0099] In this step, the AMF executes a signaling process for establishing a user plane connection according to the first NAS message, so that it can realize the process of switching from control plane transmission to user plane transmission even when the AMF is in NAS-level congestion.

[0100] It should be understood that in the case where the first NAS message includes different messages, the signaling process for establishing a user plane connection may be different. Exemplarily, in the case where the first NAS message includes an uplink NAS transmission message, the signaling process for establishing a user plane connection may include, but is not limited to, sending user plane positioning confirmation information to a Location Management Function (LMF).

[0101] Another exemplarily, in the case where the first NAS message includes a PDU session establishment request message, the signaling process for establishing a user plane connection may include, but is not limited to, sending a PDU session establishment session context request to a Session Management Function (SMF).

[0102] Another exemplarily, in the case where the first NAS message includes a PDU session modification request message, the signaling process for establishing a user plane connection may include, but is not limited to, sending a PDU session update session context request to the SMF.

[0103] Of course, the signaling process for establishing a user plane connection in the embodiments of the present application may further include other signaling processes.

[0104] In the above user plane positioning service method, when the Access and Mobility Management Function (AMF) is in a signaling congestion situation, it receives a first Non-Access Stratum (NAS) message sent by a User Equipment (UE) for establishing a user plane connection; further, the AMF executes a signaling process for establishing a user plane connection according to the first NAS message. It can be seen that, compared with the related art where the AMF rejects the NAS message sent by the UE when in a NAS-level congestion situation, in the embodiments of the present application, when the AMF is in a signaling congestion situation, by executing a signaling process for establishing a user plane connection according to the first NAS message sent by the UE, it is possible to implement the process of switching from control plane transmission to user plane transmission even when the AMF is in a signaling congestion situation, which is beneficial to implementing the transmission of positioning-related information through the user plane.

[0105] In one embodiment, Figure 3 is a schematic flowchart of a user plane positioning service method in another embodiment of the present application. On the basis of the above embodiment, the embodiments of the present application exemplarily illustrate the relevant content of step S202. As Figure 3 shown, the method of the embodiments of the present application may include the following steps:

[0106] Step S2021: The AMF determines to accept the first NAS message according to the target information carried in the first NAS message.

[0107] The target information in the embodiments of the present application can be used to indicate that the AMF accepts the NAS message sent by the UE.

[0108] In this step, the AMF can determine to accept the first NAS message according to the target information carried in the first NAS message, so as not to reject the first NAS message, facilitating the subsequent signaling process of establishing a user plane connection corresponding to the first NAS message according to the first NAS message.

[0109] It should be understood that when the first NAS message includes different messages, the target information may be different.

[0110] In a possible implementation, when the first NAS message includes an uplink NAS transport message, the target information may include, but is not limited to, the first indication information, where the first indication information can be used to indicate that the AMF accepts the NAS message of the UE; or, the target information may include, but is not limited to, user plane positioning confirmation information.

[0111] Exemplarily, the AMF can determine to accept the first NAS message according to the first indication information carried in the first NAS message.

[0112] In another example, the AMF can determine to accept the first NAS message through other means. For example, the AMF can determine that the first NAS message belongs to the user plane positioning process according to the user context information and the user plane positioning confirmation information carried in the first NAS message, so as to accept the first NAS message.

[0113] The first indication information in the embodiments of the present application can be information determined by the UE according to the second indication information sent by the AMF to the UE. For example, the first indication information and the second indication information may be the same, or the first indication information may include the second indication information and other information. Or, the first indication information can be information determined by the UE according to the user plane information of the UE. Of course, the first indication information can also be information determined by the UE through other means.

[0114] Based on the above embodiments, the following embodiments of the present application exemplarily illustrate the relevant content of the AMF sending the second indication information to the UE.

[0115] Optionally, before receiving the first non-access stratum (NAS) message sent by the user equipment (UE), the AMF can send a second NAS message to the UE, where the second NAS message is used to instruct the UE to establish a user plane connection, facilitating the UE to send the first non-access stratum NAS message to the AMF.

[0116] Exemplarily, the second NAS message may include, but is not limited to, a downlink NAS transport (DOWNLINK NASTRANSPORT) message (or simply referred to as a downlink NAS transport message). Among them, the second NAS message may include, but is not limited to, the user plane information of the UE.

[0117] The second NAS message in the embodiment of the present application may further include second indication information; of course, other information may also be included. The second indication information may be used to instruct the UE to determine the first indication information according to the second indication information, and / or, the second indication information may be used to instruct the UE to determine the third indication information according to the second indication information, where the third indication information is used to instruct the AMF to accept the NAS message sent by the UE.

[0118] Optionally, the AMF may determine the second indication information according to the user plane information and user context information of the UE, or the AMF may receive the fourth indication information sent by the LMF and determine the second indication information according to the fourth indication information. For example, the second indication information and the fourth indication information may be the same, or the second indication information may include the fourth indication information and other information.

[0119] Exemplarily, the fourth indication information may be used to indicate the cause value corresponding to the signaling process in which the LMF sends the fourth indication information. For example, switching the user plane due to overload, or switching the user plane due to other reasons, etc. It should be noted that the present application does not limit the representation form of the fourth indication information in the embodiment.

[0120] The fourth indication information in the embodiment of the present application may be carried in a communication transmission message, and user plane information for establishing a user plane may also be carried in the communication transmission message. For example, the communication transmission message may include, but is not limited to, the Namf_Communication_N1N2Transfer message.

[0121] Of course, the AMF may also determine the second indication information in other ways.

[0122] It should be noted that if the AMF is in signaling congestion, the second NAS message may not include a mobility management fallback timer, so that the UE can send a first non-access stratum NAS message to the AMF. Of course, if the second NAS message includes a mobility management fallback timer, the UE can still determine that it can send a first NAS message to the AMF according to the second indication information included in the second NAS message, or according to the user plane information of the UE.

[0123] In another possible implementation manner, when the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the target information may include, but is not limited to, the third indication information, where the third indication information may be used to instruct the AMF to receive the NAS message of the UE; or, the target information may include, but is not limited to, a data network identifier (Data Network Name, DDN).

[0124] The third indication information in the embodiments of this application may be information determined by the UE based on the second indication information sent by the AMF to the UE. For example, the third indication information may be the same as the second indication information, or the third indication information may include the second indication information and other information. Alternatively, the third indication information may be information determined by the UE based on the user plane information of the UE. Of course, the third indication information may also be information determined by the UE through other means.

[0125] Exemplarily, the AMF may determine to accept the first NAS message based on the third indication information carried in the first NAS message.

[0126] Another exemplarily, the AMF may determine that the first NAS message is a user plane positioning process based on the DDN carried in the first NAS message, and thus may accept the first NAS message. For example, when the AMF detects that the DDN carried in the first NAS message is a DDN dedicated to positioning services, it may determine that the first NAS message is a user plane positioning process.

[0127] Based on the above embodiments, the following embodiments of this application will exemplarily describe the relevant content of the AMF receiving the third NAS message sent by the UE.

[0128] Optionally, before receiving the first non-access stratum NAS message sent by the user equipment UE, the AMF may receive the third NAS message sent by the UE, where the third NAS message is used to instruct the AMF to accept the first non-access stratum NAS message.

[0129] Exemplarily, the third NAS message may include, but is not limited to, an uplink NAS transport message, and the third NAS message may include, but is not limited to, user plane positioning confirmation information.

[0130] The third NAS message in the embodiments of this application may further include first indication information, where the first indication information may be used to instruct the AMF to accept the NAS message of the UE.

[0131] It should be noted that the first indication information in the embodiments of this application may be information determined by the UE based on the user plane information of the UE, or the first indication information may be information determined by the UE based on the second indication information sent by the AMF to the UE.

[0132] Of course, the target information in the embodiments of this application may also include other information.

[0133] Step S2022: The AMF performs a signaling process for establishing a user plane connection corresponding to the first NAS message according to the first NAS message.

[0134] In this step, the AMF can execute a signaling process for establishing a user plane connection corresponding to the first NAS message according to the first NAS message, so as to facilitate the normal execution of the process of switching from control plane transmission to user plane transmission.

[0135] In a possible implementation, if the first NAS message includes an uplink NAS transmission message, the AMF can send user plane positioning confirmation information to the Location Management Function (LMF) according to the first NAS message, so that the LMF can confirm the positioning service through user plane transmission.

[0136] Exemplarily, the user plane positioning confirmation information can be carried in the first notification message. For example, the first notification message can include, but is not limited to, the Namf_N1MessageNotify message.

[0137] In another possible implementation, if the first NAS message includes a PDU session establishment request message, the AMF can send a PDU session establishment session context request to the Session Management Function (SMF) according to the first NAS message, so that the SMF can send a PDU session establishment session context request response message to the AMF.

[0138] Exemplarily, the PDU session establishment session context request can be carried in the Nsmf_PDU Session_CreateSM Context Request message; of course, the PDU session establishment session context request can also be carried in other messages.

[0139] In another possible implementation, if the first NAS message includes a PDU session modification request message, the AMF can send a PDU session update session context request to the SMF according to the first NAS message, so that the SMF can send a PDU session update session context request response message to the AMF.

[0140] Exemplarily, the PDU session update session context request can be carried in the Nsmf_PDU Session_UpdateSM Context message; of course, the PDU session update session context request can also be carried in other messages.

[0141] In summary, in the embodiments of the present application, when the Access and Mobility Management Function (AMF) is in a signaling congestion situation, it determines to accept the first NAS message according to the target information carried in the first NAS message. Further, the AMF executes a signaling process for establishing a user plane connection corresponding to the first NAS message, so that it can still execute the process of switching from control plane transmission to user plane transmission when the AMF is in a signaling congestion situation.

[0142] In one embodiment,Figure 4 This is a schematic flowchart of the user plane positioning service method in another embodiment of the present application. In the embodiments of the present application, this method is applied to Figure 1 the UE in Figure 4 as an example for illustration. As

[0143] Step S401: The user equipment UE sends a first non-access stratum NAS message to the access and mobility management function AMF. The first NAS message is used to instruct the AMF to execute the signaling process of establishing a user plane connection when in a signaling congestion state.

[0144] In this step, the UE can send a first non-access stratum NAS message to the access and mobility management function AMF. The first NAS message can be used to instruct the AMF to execute the signaling process of establishing a user plane connection when in a signaling congestion state, so that the AMF continues to execute the signaling process of establishing a user plane connection even when in a signaling congestion state upon receiving the first NAS message.

[0145] Exemplarily, the first NAS message can include but is not limited to: an uplink NAS transport message; or, a protocol data unit PDU session establishment request message; or, a protocol data unit PDU session modification request message.

[0146] It should be understood that when the first NAS message includes different messages, the signaling process of establishing a user plane connection can be different. Exemplarily, when the first NAS message includes an uplink NAS transport message, the signaling process of establishing a user plane connection can include but is not limited to sending user plane positioning confirmation information to the location management function LMF.

[0147] Another exemplarily, when the first NAS message includes a PDU session establishment request message, the signaling process of establishing a user plane connection can include but is not limited to sending a PDU session establishment session context request to the Session Management Function (SMF).

[0148] Another exemplarily, when the first NAS message includes a PDU session modification request message, the signaling process of establishing a user plane connection can include but is not limited to sending a PDU session update session context request to the SMF.

[0149] Of course, the signaling process of establishing a user plane connection in the embodiments of the present application can also include other signaling processes.

[0150] For the above user plane positioning service method, the user equipment UE can cause the access and mobility management function AMF to continue to execute the signaling process of establishing a user plane connection even when in a signaling congestion state when receiving the first non-access stratum NAS message by sending the first non-access stratum NAS message used to instruct the AMF to execute the signaling process of establishing a user plane connection in the case of a signaling congestion state. This can achieve the process of switching from control plane transmission to user plane transmission even when the AMF is in a signaling congestion state, which is beneficial to realizing the transmission of positioning-related information through the user plane.

[0151] In one embodiment, based on the above embodiment, the following embodiments of the present application exemplarily illustrate the cases where the first NAS message includes different messages.

[0152] In a possible implementation manner, if the first NAS message includes an uplink NAS transmission message, the first NAS message may include but is not limited to first indication information, where the first indication information may be used to instruct the AMF to accept the NAS message of the UE and execute the signaling process of establishing a user plane connection corresponding to the first NAS message.

[0153] The first indication information in the embodiments of the present application may be information determined by the UE according to the second indication information sent by the AMF to the UE. Or, the first indication information may be information determined by the UE according to the user plane information of the UE.

[0154] Exemplarily, before sending the first non-access stratum NAS message to the access and mobility management function AMF, the UE may receive a second NAS message sent by the AMF, where the second NAS message is used to instruct the UE to establish a user plane connection, so as to facilitate the UE to send the first non-access stratum NAS message to the AMF.

[0155] The second NAS message in the embodiments of the present application may include second indication information; of course, it may also include other information, such as the user plane information of the UE, etc. The second indication information may be used to instruct the UE to determine the first indication information according to the second indication information, and / or the second indication information may be used to instruct the UE to determine the third indication information according to the second indication information, where the third indication information is used to instruct the AMF to accept the NAS message sent by the UE.

[0156] In another example, the UE may determine the first indication information according to the user plane information of the UE

[0157] Of course, the first indication information may also be information determined by the UE through other means.

[0158] In another possible implementation, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message may include, but is not limited to, third indication information, where the third indication information is used to indicate that the AMF accepts the UE's NAS message and performs a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0159] Exemplarily, the UE may also determine the third indication information according to the first indication information, or may determine the third indication information according to the UE's user plane information. Of course, the third indication information may also be information determined by the UE in other ways.

[0160] Optionally, before sending the first non-access stratum NAS message to the access and mobility management function AMF, the UE may send a third NAS message to the AMF, where the third NAS message is used to indicate that the AMF accepts the first non-access stratum NAS message.

[0161] Exemplarily, the third NAS message may include, but is not limited to, first indication information, where the first indication information may be used to indicate that the AMF accepts the UE's NAS message.

[0162] It should be noted that the first indication information in the embodiments of the present application may be information determined by the UE according to the UE's user plane information, or the first indication information may be information determined by the UE according to the second indication information sent by the AMF to the UE.

[0163] In another possible implementation, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message may include, but is not limited to, a data network identifier DNN, where the data network identifier DNN is used to indicate that the AMF accepts the UE's NAS message and performs a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0164] In one embodiment, Figure 5 is a schematic flowchart of a user plane positioning service method in another embodiment of the present application. On the basis of the above embodiments, in the embodiments of the present application, in combination with the UE side, the AMF side, the LMF side, and the SMF side, a possible implementation manner of the user plane positioning service method in the embodiments of the present application is described. As Figure 5 shown, the method of the embodiments of the present application may include the following steps:

[0165] Step S501, the LMF determines to use the user plane positioning service.

[0166] Step S502, the LMF sends a communication transmission message to the AMF, where the communication transmission message may include, but is not limited to, user plane information for establishing a user plane.

[0167] Exemplarily, the communication transmission message in the embodiments of the present application may include, but is not limited to, the Namf_Communication_N1N2Transfer message.

[0168] Step S503: The AMF sends a downlink NAS transmission message to the UE, where the downlink NAS transmission message may include, but is not limited to, the user plane information of the UE and the second indication information.

[0169] Exemplarily, the AMF may determine a user plane positioning process according to the user context information and the user plane information sent by the LMF, and determine the second indication information. Further, the AMF may carry the second indication information in the downlink NAS transmission message, so that the UE can establish a user plane connection according to the second indication information, and the subsequent signaling message sent to the AMF may include indication information corresponding to the second indication information (for example, the first indication information or the third indication information), so as to facilitate the AMF to associate the signaling process.

[0170] Optionally, if the AMF determines that there is signaling congestion, the downlink NAS transmission message may not include a mobility management fallback timer.

[0171] Step S504: The UE sends an uplink NAS transmission message to the AMF, where the uplink NAS transmission message may include, but is not limited to, user plane positioning confirmation information.

[0172] Exemplarily, the uplink NAS transmission message may further include the first indication information for indicating that the AMF accepts the NAS message of the UE, where the first indication information may be the same as the second indication information, so that the AMF can determine according to the first indication information that the uplink NAS transmission message and the downlink NAS transmission message in the above step S503 belong to the same signaling process, and thus accept the uplink NAS transmission message according to the first indication information, so as to facilitate the execution of step S505.

[0173] In another example, the uplink NAS transmission message may not include the first indication information, but after receiving the uplink NAS transmission message, the AMF may determine that the uplink NAS transmission message belongs to the user plane positioning process according to the user context information and the user plane positioning confirmation information, and thus accept the uplink NAS transmission message, so as to facilitate the execution of step S505.

[0174] Step S505: The AMF sends a first notification message to the LMF, where the first notification message may include, but is not limited to, user plane positioning confirmation information.

[0175] Exemplarily, the first notification message in the embodiments of the present application may include, but is not limited to, the Namf_N1MessageNotify message.

[0176] Step S506: The LMF notifies the UE to establish a secure connection through the UE's IP address.

[0177] Step S507A: The UE sends a PDU session request message to the AMF. The PDU session request message may include, but is not limited to, a DNN and third indication information.

[0178] Exemplarily, the PDU session request message may include, but is not limited to, a PDU session establishment request message or a PDU session modification request message.

[0179] The third indication information in the embodiments of the present application can be used to indicate that the AMF accepts the NAS message sent by the UE. The third indication information may be the same as the second indication information, so that the AMF can determine that Step S507A belongs to the same signaling process as the above other steps according to the third indication information, and thus accept the PDU session request message according to the third indication information to facilitate the execution of Step S507B. It should be noted that the third indication information is used as the transaction identifier of the signaling process, and the specific form thereof is not limited in the embodiments of the present application.

[0180] Step S507B: The AMF sends a PDU session context request to the SMF so that the SMF can send a PDU session context request response message ( Figure 5 not shown in the figure).

[0181] Exemplarily, the PDU session context request may include, but is not limited to, a PDU session establishment session context request or a PDU session modification request message.

[0182] Exemplarily, the PDU session establishment session context request may be carried in an Nsmf_PDU Session_CreateSM Context Request message, and the PDU session update session context request may be carried in an Nsmf_PDU Session_Update SM Context message.

[0183] Step S508: The LMF sends a second notification message to the AMF. The second notification message may include, but is not limited to, user plane positioning confirmation information.

[0184] Exemplarily, the second notification message may include, but is not limited to, an N1mf_Location_UP Notify message.

[0185] Step S509: The AMF stores the Location Service User Plane (LCS-CP) connection context.

[0186] Step S510: Use the user plane for user location services and supplementary services.

[0187] It should be noted that the relevant content of steps S506, S508 - S510, etc. in the embodiments of this application can refer to the relevant content in the user plane location process recorded in the 3GPP standard, which will not be elaborated here.

[0188] It should be understood that although the steps in the above flow chart are displayed in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. For example, steps S507A - S507B can be executed first, and then steps S504 - S506, etc.

[0189] In summary, in the embodiments of this application, by sending the second indication information from the AMF to the UE, on the one hand, it is convenient for the UE to carry the first indication information or not carry the first indication information when sending an uplink NAS transport message to the AMF, and on the other hand, it is convenient for the UE to carry the third indication information when sending a PDU session request message to the AMF. Further, when the AMF is in a signaling congestion situation, it can determine to receive the uplink NAS transport message according to the first indication information, or the user context information and the user plane location confirmation information, so as to execute the signaling process of establishing a user plane connection corresponding to the uplink NAS transport message. Further, when the AMF is in a signaling congestion situation, it can determine to receive the PDU session request message according to the third indication information, so as to execute the signaling process of establishing a user plane connection corresponding to the PDU session request message. It can be seen that in the embodiments of this application, the process of switching from control plane transmission to user plane transmission can still be executed even when the AMF is in a signaling congestion situation.

[0190] In one embodiment, Figure 6 This is a schematic flow chart of the user plane location service method in another embodiment of this application. On the basis of the above embodiments, in the embodiments of this application, in combination with the UE side, the AMF side, the LMF side, and the SMF side, another possible implementation manner of the user plane location service method in the embodiments of this application is described. As Figure 6 shown, the method of the embodiments of this application may include the following steps:

[0191] Step S601: The LMF determines to use the user plane location service.

[0192] Step S602: The LMF sends a communication transport message to the AMF, where the communication transport message may include, but is not limited to, the fourth indication information and the user plane information for establishing the user plane.

[0193] Exemplarily, the communication transmission message in the embodiments of the present application may include, but is not limited to, the Namf_Communication_N1N2Transfer message.

[0194] The fourth indication information in the embodiments of the present application may be used to indicate the cause value corresponding to the signaling process in which the LMF sends the fourth indication information. For example, switching the user plane due to overload, or switching the user plane for other reasons, etc. It should be noted that the present application does not limit the representation form of the fourth indication information.

[0195] Step S603, the AMF sends a downlink NAS transport message to the UE, where the downlink NAS transport message may include, but is not limited to, the user plane information of the UE and the second indication information.

[0196] Exemplarily, the AMF may determine the second indication information according to the fourth indication information, and carry the second indication information in the downlink NAS transport message (the second indication information may be used as the transaction identifier of the signaling process), so that the UE can establish a user plane connection according to the second indication information, and the subsequent signaling message sent to the AMF may include the indication information corresponding to the second indication information (for example, the first indication information or the third indication information), so as to facilitate the AMF to associate the signaling process.

[0197] Optionally, if the AMF determines that there is signaling congestion, the downlink NAS transport message may not include the mobility management fallback timer.

[0198] Step S604, the UE sends an uplink NAS transport message to the AMF, where the uplink NAS transport message may include, but is not limited to, the user plane positioning confirmation information.

[0199] Exemplarily, the uplink NAS transport message may further include the first indication information for indicating that the AMF accepts the NAS message of the UE, where the first indication information may be the same as the second indication information, so that the AMF can determine according to the first indication information that the uplink NAS transport message and the downlink NAS transport message in the above step S603 belong to the same signaling process, and thus accept the uplink NAS transport message according to the first indication information, so as to facilitate the execution of step S605.

[0200] In another example, the uplink NAS transport message may not include the first indication information, but after receiving the uplink NAS transport message, the AMF may determine that the uplink NAS transport message belongs to the user plane positioning process according to the user context information and the user plane positioning confirmation information, and thus accept the uplink NAS transport message, so as to facilitate the execution of step S605.

[0201] Step S605: The AMF sends a first notification message to the LMF. The first notification message may include, but is not limited to, user plane positioning confirmation information.

[0202] Exemplarily, the first notification message in the embodiments of the present application may include, but is not limited to, the Namf_N1MessageNotify message.

[0203] Step S606: If the LMF has the IP address of the UE, the LMF notifies the UE to establish a secure connection.

[0204] Step S607A: The UE sends a PDU session request message to the AMF. The PDU session request message may include, but is not limited to, the DNN and the third indication information.

[0205] Exemplarily, the PDU session request message may include, but is not limited to, a PDU session establishment request message or a PDU session modification request message.

[0206] The third indication information in the embodiments of the present application can be used to indicate that the AMF accepts the NAS message sent by the UE. The third indication information may be the same as the first indication information or the second indication information, so that the AMF can determine that Step S607A belongs to the same signaling process as the above other steps according to the third indication information, and thus accept the PDU session request message according to the third indication information, so as to facilitate the execution of Step S607B. It should be noted that the third indication information is used as the transaction identifier of the signaling process, and the specific form thereof is not limited in the embodiments of the present application.

[0207] Step S607B: The AMF sends a PDU session context request to the SMF, so that the SMF can send a PDU session context request response message ( Figure 6 not shown in the figure).

[0208] Exemplarily, the PDU session context request may include, but is not limited to, a PDU session establishment session context request or a PDU session modification request message.

[0209] Step S608: The LMF sends a second notification message to the AMF. The second notification message may include, but is not limited to, user plane positioning confirmation information.

[0210] Exemplarily, the second notification message may include, but is not limited to, the N1mf_Location_UP Notify message.

[0211] Step S609: The AMF stores the LCS-UP connection context.

[0212] Step S610: Use the user plane for user positioning services and supplementary services.

[0213] It should be noted that the relevant content of steps S606, S608 - S610, etc. in the embodiments of the present application can refer to the relevant content in the user plane positioning process recorded in the 3GPP standard, which will not be elaborated here.

[0214] It should be understood that although the steps in the above flow chart are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. For example, steps S607A - S607B can be executed first, and then steps S604 - S606, etc.

[0215] In summary, in the embodiments of the present application, the LMF sends the fourth indication information to the AMF, so that the AMF can determine the second indication according to the fourth indication information and send the second indication information to the UE. On the one hand, it is convenient for the UE to carry the first indication information or not carry the first indication information when sending an uplink NAS transmission message to the AMF. On the other hand, it is convenient for the UE to carry the third indication information when sending a PDU session request message to the AMF. Further, when the AMF is in a signaling congestion situation, it can determine to receive the uplink NAS transmission message according to the first indication information, or user context information and user plane positioning confirmation information, so as to execute the signaling process of establishing a user plane connection corresponding to the uplink NAS transmission message. Further, when the AMF is in a signaling congestion situation, it can determine to receive the PDU session request message according to the third indication information, so as to execute the signaling process of establishing a user plane connection corresponding to the PDU session request message. It can be seen that in the embodiments of the present application, the process of switching from control plane transmission to user plane transmission can still be executed even when the AMF is in a signaling congestion situation.

[0216] In one embodiment, Figure 7 It is a schematic flow chart of the user plane positioning service method in another embodiment of the present application. On the basis of the above embodiments, in the embodiments of the present application, in combination with the UE side, AMF side, LMF side, and SMF side, another possible implementation manner of the user plane positioning service method in the embodiments of the present application is described. As Figure 7 shown, the method of the embodiments of the present application may include the following steps:

[0217] Step S701, the LMF determines to use the user plane positioning service.

[0218] Step S702, the LMF sends a communication transmission message to the AMF, where the communication transmission message may include, but is not limited to, user plane information for establishing a user plane.

[0219] Exemplarily, the communication transmission message in the embodiments of the present application may include, but is not limited to, the Namf_Communication_N1N2Transfer message.

[0220] Step S703: The AMF sends a downlink NAS transmission message to the UE, where the downlink NAS transmission message may include, but is not limited to, the user plane information of the UE.

[0221] Step S704: The UE sends an uplink NAS transmission message to the AMF, where the uplink NAS transmission message may include, but is not limited to, the user plane positioning confirmation information and the first indication information.

[0222] Wherein, the first indication information may be used to instruct the AMF to accept the NAS message of the UE, so that the AMF accepts the uplink NAS transmission message and / or the PDU session request message according to the first indication information, so as to execute step S705 and / or step S707B.

[0223] Exemplarily, the UE may determine that the uplink NAS transmission message includes the first indication information according to the received user plane information.

[0224] Step S705: The AMF sends a first notification message to the LMF, where the first notification message may include, but is not limited to, the user plane positioning confirmation information.

[0225] Exemplarily, the first notification message in the embodiments of the present application may include, but is not limited to, the Namf_N1MessageNotify message.

[0226] Step S706: The LMF notifies the UE to establish a secure connection through the IP address of the UE.

[0227] Step S707A: The UE sends a PDU session request message to the AMF, where the PDU session request message may include, but is not limited to, the DNN and the third indication information.

[0228] Exemplarily, the PDU session request message may include, but is not limited to, a PDU session establishment request message or a PDU session modification request message.

[0229] The third indication information in the embodiments of the present application may be used to instruct the AMF to accept the NAS message sent by the UE, where the third indication information may be the same as the first indication information, so that the AMF can determine that step S707A and the above other steps belong to the same signaling process according to the third indication information, and thus accept the PDU session request message according to the third indication information, so as to execute step S707B.

[0230] Step S707B: The AMF sends a PDU session context request to the SMF so that the SMF can send a PDU session context request response message to the AMF ( Figure 7 not shown in

[0231] Step S708: The LMF sends a second notification message to the AMF, where the second notification message may include, but is not limited to, user plane positioning confirmation information.

[0232] Exemplarily, the second notification message may include, but is not limited to, the N1mf_Location_UP Notify message.

[0233] Step S709: The AMF stores the LCS-UP connection context.

[0234] Step S710: Use the user plane for user positioning services and supplementary services.

[0235] It should be noted that the relevant content of steps S706, S708 - S710, etc. in the embodiments of this application can refer to the relevant content in the user plane positioning process recorded in the 3GPP standard, which will not be elaborated here.

[0236] It should be understood that although the steps in the above flow chart are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. For example, steps S707A - S707B can be executed first, and then steps S704 - S706, etc.

[0237] In summary, in the embodiments of this application, when the UE determines to send an uplink NAS transport message to the AMF according to the user plane information, it can carry the first indication information, so that when the AMF is in a signaling congestion situation, it can determine to receive the uplink NAS transport message according to the first indication information, and then execute the signaling process of establishing a user plane connection corresponding to the uplink NAS transport message. Further, when the UE sends a PDU session request message to the AMF, it can carry the third indication information, so that when the AMF is in a signaling congestion situation, it can determine to receive the PDU session request message according to the third indication information, and then execute the signaling process of establishing a user plane connection corresponding to the PDU session request message. It can be seen that in the embodiments of this application, the process of switching from control plane transmission to user plane transmission can still be executed even when the AMF is in a signaling congestion situation.

[0238] In one embodiment, Figure 8FIG. 0 is a schematic flow chart of a user plane positioning service method in another embodiment of the present application. Based on the above embodiments, in the embodiments of the present application, in combination with the UE side, the AMF side, the LMF side, and the SMF side, another possible implementation manner of the user plane positioning service method in the embodiments of the present application is described. As Figure 8 shown, the method of the embodiments of the present application may include the following steps:

[0239] Step S801, the LMF determines to use the user plane positioning service.

[0240] Step S802, the LMF sends a communication transmission message to the AMF, where the communication transmission message may include, but is not limited to, user plane information for establishing a user plane.

[0241] Exemplarily, the communication transmission message in the embodiments of the present application may include, but is not limited to, the Namf_Communication_N1N2Transfer message.

[0242] Step S803, the AMF sends a downlink NAS transmission message to the UE, where the downlink NAS transmission message may include, but is not limited to, user plane information of the UE.

[0243] Step S804, the UE sends an uplink NAS transmission message to the AMF, where the uplink NAS transmission message may include, but is not limited to, user plane positioning confirmation information.

[0244] Step S805, the AMF sends a first notification message to the LMF, where the first notification message may include, but is not limited to, user plane positioning confirmation information.

[0245] Step S806, the LMF notifies the UE to establish a secure connection through the IP address of the UE.

[0246] Step S807A, the UE sends a PDU session request message to the AMF, where the PDU session request message may include, but is not limited to, a DNN.

[0247] Exemplarily, the PDU session request message may include, but is not limited to, a PDU session establishment request message or a PDU session modification request message.

[0248] Exemplarily, if the AMF determines that the DDN carried in the PDU session request message is a DDN dedicated to the positioning service and the AMF stores the user context information of the UE, the AMF may determine that the PDU session request message belongs to the user plane positioning process, thereby receiving the PDU session request message to facilitate the execution of step S807B.

[0249] Step S807B. The AMF sends a PDU session context request to the SMF so that the SMF can send a PDU session context request response message to the AMF ( Figure 8 not shown in

[0250] Exemplarily, the PDU session context request may include, but is not limited to, a PDU session establishment session context request or a PDU session modification request message.

[0251] Step S808. The LMF sends a second notification message to the AMF, where the second notification message may include, but is not limited to, user plane positioning confirmation information.

[0252] Step S809. The AMF stores the LCS-UP connection context.

[0253] Step S810. Use the user plane for user positioning services and supplementary services.

[0254] It should be noted that the relevant content of steps S806, S808 - S810, etc. in the embodiments of the present application can refer to the relevant content in the user plane positioning process recorded in the 3GPP standard, which will not be elaborated here.

[0255] It should be understood that although the steps in the above flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. For example, steps S807A - S807B can be executed first, and then steps S804 - S806, etc.

[0256] In summary, in the embodiments of the present application, when the AMF is in a signaling congestion situation, by determining to receive the PDU session request message according to the DDN carried in the PDU session request message, the AMF thus executes the signaling process of establishing a user plane connection corresponding to the PDU session request message. It can be seen that in the embodiments of the present application, the process of switching from control plane transmission to user plane transmission can still be executed even when the AMF is in a signaling congestion situation.

[0257] In one embodiment, Figure 9 is a schematic flowchart of a user plane positioning service method in another embodiment of the present application. On the basis of the above embodiments, in the embodiments of the present application, in combination with the UE side, the AMF side, the LMF side, and the SMF side, another possible implementation manner of the user plane positioning service method in the embodiments of the present application is described. As Figure 9 shown, the method of the embodiments of the present application may include the following steps:

[0258] Step S901, the LMF determines to use the user plane positioning service.

[0259] Step S902, the LMF sends a communication transmission message to the AMF, where the communication transmission message may include, but is not limited to, user plane information for establishing the user plane.

[0260] Exemplarily, the communication transmission message in the embodiments of the present application may include, but is not limited to, the Namf_Communication_N1N2Transfer message.

[0261] Step S903, the AMF sends a downlink NAS transmission message to the UE, where the downlink NAS transmission message may include, but is not limited to, the user plane information of the UE.

[0262] Step S904, the UE sends an uplink NAS transmission message to the AMF, where the uplink NAS transmission message may include, but is not limited to, user plane positioning confirmation information.

[0263] Step S905, the AMF sends a first notification message to the LMF, where the first notification message may include, but is not limited to, user plane positioning confirmation information.

[0264] Step S906, the LMF notifies the UE to establish a secure connection through the IP address of the UE.

[0265] Step S907A, the UE sends a PDU session request message to the AMF, where the PDU session request message may include, but is not limited to, the DNN and the third indication information.

[0266] Exemplarily, the PDU session request message may include, but is not limited to, a PDU session establishment request message or a PDU session modification request message.

[0267] The third indication information in the embodiments of the present application can be used to indicate that the AMF accepts the NAS message sent by the UE, so that the AMF can determine that Step S907A belongs to the user plane positioning signaling process according to the third indication information, and thus accept the PDU session request message according to the third indication information, so as to facilitate the execution of Step S907B.

[0268] Exemplarily, the UE can determine that the PDU session request process is for implementing the user plane positioning service according to the received user plane information, and determine the third indication information according to the user plane information, where the third indication information can be used to indicate the cause value of establishing the session, etc. It should be noted that the representation form of the third indication information in the embodiments of the present application is not limited.

[0269] Step S907B, the AMF sends a PDU session context request to the SMF, so that the SMF can send a PDU session context request response message to the AMFFigure 9 not shown).

[0270] Exemplarily, the PDU session context request may include, but is not limited to, a PDU session establishment session context request or a PDU session modification request message.

[0271] Step S908, the LMF sends a second notification message to the AMF, where the second notification message may include, but is not limited to, user plane positioning confirmation information.

[0272] Step S909, the AMF stores the LCS-UP connection context.

[0273] Step S910, use the user plane for user positioning services and supplementary services.

[0274] It should be noted that the relevant content of steps S906, S908-S910, etc. in the embodiments of the present application can refer to the relevant content in the user plane positioning process recorded in the 3GPP standard, which will not be elaborated here.

[0275] It should be understood that although the steps in the above flowcharts are displayed in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. For example, steps S907A-S907B can be executed first, and then steps S904-S906, etc.

[0276] In summary, in the embodiments of the present application, when the UE determines to send a PDU session request message to the AMF according to the received user plane information, the third indication information can be carried, so that when the AMF is in a signaling congestion situation, it can determine to receive the PDU session request message according to the third indication information, and then execute the signaling process of establishing a user plane connection corresponding to the PDU session request message. It can be seen that in the embodiments of the present application, the process of switching from control plane transmission to user plane transmission can still be executed even when the AMF is in a signaling congestion situation.

[0277] It should be understood that at least a part of the steps in the above flowcharts may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments, and the execution order of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or steps in other steps.

[0278] In one embodiment, Figure 10This is a schematic structural diagram of a user plane positioning service device in an embodiment of the present application. The user plane positioning service device provided in the embodiment of the present application can be applied in the AMF. As Figure 10 shown, the user plane positioning service device in the embodiment of the present application may include: a first receiving module 1001 and an establishing module 1002.

[0279] Among them, the first receiving module 1001 is configured to receive a first non-access stratum (NAS) message sent by a user equipment (UE) in a case of signaling congestion, and the first NAS message is used to establish a user plane connection;

[0280] The establishing module 1002 is configured to execute a signaling process for establishing a user plane connection according to the first NAS message.

[0281] In one embodiment, the establishing module 1002 includes:

[0282] a determining unit, configured to determine to accept the first NAS message according to the target information carried in the first NAS message;

[0283] an executing unit, configured to execute a signaling process for establishing a user plane connection corresponding to the first NAS message according to the first NAS message.

[0284] In one embodiment, the first NAS message includes:

[0285] an uplink NAS transport message;

[0286] Or,

[0287] a protocol data unit (PDU) session establishment request message;

[0288] Or,

[0289] a protocol data unit (PDU) session modification request message.

[0290] In one embodiment, if the first NAS message includes an uplink NAS transport message, the target information includes a first indication information, wherein the first indication information is used to indicate that the AMF accepts the NAS message of the UE; or,

[0291] the target information includes user plane positioning confirmation information.

[0292] In one embodiment, the executing unit is specifically configured to:

[0293] send user plane positioning confirmation information to a location management function (LMF) according to the first NAS message.

[0294] In one embodiment, the user plane positioning service device further includes:

[0295] A sending module, configured to send a second NAS message, where the second NAS message is used to instruct the UE to establish a user plane connection.

[0296] In one embodiment, the second NAS message includes second indication information, where the second indication information is used to instruct the UE to determine first indication information according to the second indication information, and / or, the second indication information is used to instruct the UE to determine third indication information according to the second indication information, where the third indication information is used to instruct the AMF to accept the NAS message sent by the UE.

[0297] In one embodiment, the user plane positioning service device further includes:

[0298] A first determination module, configured to determine the second indication information according to the user plane information and the user context information.

[0299] In one embodiment, the user plane positioning service device further includes:

[0300] A second receiving module, configured to receive fourth indication information sent by the LMF;

[0301] A second determination module, configured to determine the second indication information according to the fourth indication information.

[0302] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the target information includes the third indication information; or,

[0303] The target information includes a data network identifier.

[0304] In one embodiment, the execution unit is specifically configured to:

[0305] If the first NAS message includes a PDU session establishment request message, send a PDU session establishment session context request to the session management function SMF according to the first NAS message; or,

[0306] If the first NAS message includes a PDU session modification request message, send a PDU session update session context request to the SMF according to the first NAS message.

[0307] In one embodiment, the user plane positioning service device further includes:

[0308] A third receiving module, configured to receive a third NAS message sent by the UE, where the third NAS message is used to instruct the AMF to accept the first non-access stratum NAS message.

[0309] In one embodiment, the third NAS message includes first indication information, where the first indication information is used to instruct the AMF to accept the NAS message of the UE.

[0310] The user plane positioning service device provided by the embodiment of the present application can be used to execute the technical solution regarding the AMF in the above-mentioned method embodiment of the user plane positioning service of the present application. The implementation principle and technical effect are similar, and will not be elaborated here.

[0311] Each module in the above-mentioned user plane positioning service device can be implemented in whole or in part by software, hardware, and their combination. The above-mentioned modules can be embedded in the processor in the AMF in the form of hardware or independent of it, or stored in the memory in the AMF in the form of software, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0312] In one embodiment, Figure 11 is a schematic structural diagram of the AMF in an embodiment of the present application. As Figure 11 shown, the AMF provided by the embodiment of the present application may include: a memory 1101 and a processor 1102. A computer program is stored in the memory 1101. When the processor 1102 executes the computer program, the following steps are implemented:

[0313] In the case of signaling congestion, receive a first non-access stratum (NAS) message sent by a user equipment (UE), where the first NAS message is used to establish a user plane connection;

[0314] Execute a signaling process for establishing a user plane connection according to the first NAS message.

[0315] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0316] Determine to accept the first NAS message according to the target information carried in the first NAS message;

[0317] Execute a signaling process for establishing a user plane connection corresponding to the first NAS message according to the first NAS message.

[0318] In one embodiment, the first NAS message includes:

[0319] An uplink NAS transport message;

[0320] Or,

[0321] A protocol data unit (PDU) session establishment request message;

[0322] Or,

[0323] A protocol data unit (PDU) session modification request message.

[0324] In one embodiment, if the first NAS message includes an uplink NAS transport message, the target information includes a first indication information, where the first indication information is used to indicate that the AMF accepts the NAS message of the UE; or,

[0325] The target information includes user plane positioning confirmation information.

[0326] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0327] Send the user plane positioning confirmation information to the Location Management Function (LMF) according to the first NAS message.

[0328] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0329] Send a second NAS message to the UE, where the second NAS message is used to instruct the UE to establish a user plane connection.

[0330] In one embodiment, the second NAS message includes second indication information, where the second indication information is used to instruct the UE to determine first indication information according to the second indication information, and / or the second indication information is used to instruct the UE to determine third indication information according to the second indication information, where the third indication information is used to instruct the Access and Mobility Management Function (AMF) to accept the NAS message sent by the UE.

[0331] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0332] Determine the second indication information according to the user plane information and the user context information.

[0333] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0334] Receive the fourth indication information sent by the LMF;

[0335] Determine the second indication information according to the fourth indication information.

[0336] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the target information includes third indication information; or,

[0337] The target information includes a data network identifier.

[0338] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0339] If the first NAS message includes a PDU session establishment request message, send a PDU session establishment session context request to the Session Management Function (SMF) according to the first NAS message; or,

[0340] If the first NAS message includes a PDU session modification request message, send a PDU session update session context request to the SMF according to the first NAS message.

[0341] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0342] Receive a third NAS message sent by the UE, where the third NAS message is used to instruct the AMF to accept the first non-access stratum NAS message.

[0343] In one embodiment, the third NAS message includes first indication information, where the first indication information is used to instruct the AMF to accept the NAS message of the UE.

[0344] It should be noted that the specific implementation principle and technical effect are similar to the technical solution regarding the AMF in the above embodiment of the user plane positioning service method, and will not be elaborated here.

[0345] In one embodiment, Figure 12 FIG. is a schematic structural diagram of a user plane positioning service device in another embodiment of the present application. The user plane positioning service device provided in the embodiments of the present application can be applied to a UE. As Figure 12 shown, the user plane positioning service device in the embodiments of the present application may include: a first sending module 1201.

[0346] Among them, the first sending module 1201 is used to send a first non-access stratum NAS message to the access and mobility management function AMF, where the first NAS message is used to instruct the AMF to execute a signaling process for establishing a user plane connection when in a signaling congestion state.

[0347] In one embodiment, the first NAS message includes:

[0348] An uplink NAS transport message;

[0349] Or,

[0350] A protocol data unit PDU session establishment request message;

[0351] Or,

[0352] A protocol data unit PDU session modification request message.

[0353] In one embodiment, if the first NAS message includes an uplink NAS transport message, the first NAS message includes first indication information, where the first indication information is used to instruct the AMF to accept the NAS message of the UE and execute a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0354] In one embodiment, the user plane positioning service device further includes:

[0355] A receiving module, configured to receive a second NAS message sent by the AMF, where the second NAS message is used to instruct the UE to establish a user plane connection.

[0356] In one embodiment, the second NAS message includes second indication information, where the second indication information is used to instruct the UE to determine the first indication information according to the second indication information, and / or, the second indication information is used to instruct the UE to determine the third indication information according to the second indication information, where the third indication information is used to instruct the AMF to accept the NAS message of the UE.

[0357] In one embodiment, the user plane positioning service device further includes:

[0358] A first determination module, configured to determine first indication information according to user plane information.

[0359] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message includes third indication information, where the third indication information is used to instruct the AMF to accept the NAS message of the UE and perform a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0360] In one embodiment, the user plane positioning service device further includes:

[0361] A second determination module, configured to determine third indication information according to the first indication information; or,

[0362] A third determination module, configured to determine third indication information according to user plane information.

[0363] In one embodiment, the user plane positioning service device further includes:

[0364] A second sending module, configured to send a third NAS message to the AMF, where the third NAS message is used to instruct the AMF to accept the first non-access stratum NAS message.

[0365] In one embodiment, the third NAS message includes first indication information, where the first indication information is used to instruct the AMF to accept the NAS message of the UE.

[0366] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message includes a data network identifier, where the data network identifier is used to instruct the AMF to accept the NAS message of the UE and perform a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0367] The user plane positioning service device provided by the embodiments of the present application can be used to execute the technical solutions regarding the UE in the embodiments of the user plane positioning service method of the present application above. The implementation principles and technical effects are similar and will not be elaborated here.

[0368] Each module in the above user plane positioning service device can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in the processor in the UE in the form of hardware or independent of the processor, or stored in the memory in the UE in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0369] In one embodiment, Figure 13 is a schematic structural diagram of a UE in an embodiment of the present application. As Figure 13 shown, the UE provided in the embodiment of the present application may include: a transmitter 1301.

[0370] Among them, the transmitter 1301 is used to send a first non-access stratum (NAS) message to the access and mobility management function (AMF). The first NAS message is used to instruct the AMF to execute a signaling process for establishing a user plane connection when in a signaling congestion state.

[0371] In one embodiment, the first NAS message includes:

[0372] an uplink NAS transport message;

[0373] Or,

[0374] a protocol data unit (PDU) session establishment request message;

[0375] Or,

[0376] a protocol data unit (PDU) session modification request message.

[0377] In one embodiment, if the first NAS message includes an uplink NAS transport message, the first NAS message includes first indication information, where the first indication information is used to instruct the AMF to accept the NAS message of the UE and execute a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0378] In one embodiment, the UE further includes:

[0379] a receiver, configured to receive a second NAS message sent by the AMF, where the second NAS message is used to instruct the UE to establish a user plane connection.

[0380] In one embodiment, the second NAS message includes second indication information, where the second indication information is used to instruct the UE to determine the first indication information according to the second indication information, and / or the second indication information is used to instruct the UE to determine third indication information according to the second indication information, where the third indication information is used to instruct the AMF to accept the NAS message of the UE.

[0381] In one embodiment, the UE further includes:

[0382] A processor for determining first indication information based on user plane information.

[0383] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message includes third indication information, where the third indication information is used to indicate that the AMF accepts the UE's NAS message and performs a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0384] In one embodiment, the processor is further configured to:

[0385] Determine third indication information based on the first indication information; or,

[0386] Determine third indication information based on the user plane information.

[0387] In one embodiment, the transmitter 1301 is further configured to:

[0388] Send a third NAS message to the AMF, where the third NAS message is used to indicate that the AMF accepts the first non-access stratum NAS message.

[0389] In one embodiment, the third NAS message includes first indication information, where the first indication information is used to indicate that the AMF accepts the UE's NAS message.

[0390] In one embodiment, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message includes a data network identifier, where the data network identifier is used to indicate that the AMF accepts the UE's NAS message and performs a signaling process for establishing a user plane connection corresponding to the first NAS message.

[0391] It should be noted that the specific implementation principle and technical effect are similar to the technical solution regarding the UE in the above embodiment of the user plane positioning service method, and will not be elaborated here.

[0392] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the technical solution regarding the AMF or the UE in the above embodiment of the user plane positioning service method of the present application. The implementation principle and technical effect are similar, and will not be elaborated here.

[0393] In one embodiment, the embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the technical solution regarding the AMF or the UE in the above embodiment of the user plane positioning service method of the present application. The implementation principle and technical effect are similar, and will not be elaborated here.

[0394] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0395] The processor disclosed in the above embodiments of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit in the hardware of the processor or by instructions in software form. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor or completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, register, etc. This storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the above method.

[0396] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0397] The above embodiments only express several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A user plane positioning service method, characterized in that, the method includes: When the access and mobility management function AMF is in a signaling congestion situation, it receives a first non-access stratum NAS message sent by a user equipment UE, and the first NAS message is used to establish a user plane connection; The AMF performs a signaling process for establishing a user plane connection according to the first NAS message.

2. The method according to claim 1, characterized in that, the AMF performing a signaling process for establishing a user plane connection according to the first NAS message includes: The AMF determines to accept the first NAS message according to the target information carried in the first NAS message; The AMF performs a signaling process for establishing a user plane connection corresponding to the first NAS message according to the first NAS message.

3. The method according to claim 1 or 2, characterized in that, the first NAS message includes: an uplink NAS transport message; or, a protocol data unit PDU session establishment request message; or, a protocol data unit PDU session modification request message.

4. The method according to claim 3, characterized in that, If the first NAS message includes the uplink NAS transport message, the target information includes a first indication information, wherein the first indication information is used to indicate that the AMF accepts the NAS message of the UE; or, the target information includes user plane positioning confirmation information.

5. The method according to claim 4, characterized in that, the AMF performing a signaling process for establishing a user plane connection corresponding to the first NAS message according to the first NAS message includes: The AMF sends the user plane positioning confirmation information to the location management function LMF according to the first NAS message.

6. The method according to claim 4 or 5, characterized in that, before receiving the first non-access stratum NAS message sent by the user equipment UE, the method further includes: The AMF sends a second NAS message to the UE, and the second NAS message is used to instruct the UE to establish a user plane connection.

7. The method according to claim 6, characterized in that, the second NAS message includes a second indication information, wherein the second indication information is used to instruct the UE to determine the first indication information according to the second indication information, and / or, the second indication information is used to instruct the UE to determine a third indication information according to the second indication information, wherein the third indication information is used to indicate that the AMF accepts the NAS message sent by the UE.

8. The method according to claim 7, characterized in that, the method further includes: The AMF determines the second indication information according to the user plane information and the user context information.

9. The method according to claim 7, characterized in that, the method further includes: The AMF receives a fourth indication information sent by the LMF; The AMF determines the second indication information according to the fourth indication information.

10. The method according to claim 3, characterized in that, If the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the target information includes third indication information; or, the target information includes a data network identifier.

11. The method according to claim 10, wherein, the AMF performs a signaling procedure for establishing a user plane connection corresponding to the first NAS message according to the first NAS message, including: if the first NAS message includes the PDU session establishment request message, the AMF sends a PDU session establishment session context request to a session management function SMF according to the first NAS message; or, if the first NAS message includes the PDU session modification request message, the AMF sends a PDU session update session context request to the SMF according to the first NAS message.

12. The method according to claim 10 or 11, wherein, the method further includes: the AMF receives a third NAS message sent by the UE, and the third NAS message is used to instruct the AMF to accept the first non-access stratum NAS message.

13. The method according to claim 12, wherein, the third NAS message includes first indication information, and the first indication information is used to instruct the AMF to accept the NAS message of the UE.

14. A user plane positioning service method, wherein, the method includes: a user equipment UE sends a first non-access stratum NAS message to an access and mobility management function AMF, wherein the first NAS message is used to instruct the AMF to perform a signaling procedure for establishing a user plane connection when in a signaling congestion state.

15. The method according to claim 14, wherein, the first NAS message includes: an uplink NAS transport message; or, a protocol data unit PDU session establishment request message; or, a protocol data unit PDU session modification request message.

16. The method according to claim 15, wherein, if the first NAS message includes the uplink NAS transport message, the first NAS message includes first indication information, and the first indication information is used to instruct the AMF to accept the NAS message of the UE and perform a signaling procedure for establishing a user plane connection corresponding to the first NAS message.

17. The method according to claim 16, wherein, before the user equipment UE sends the first non-access stratum NAS message to the access and mobility management function AMF, the method further includes: the UE receives a second NAS message sent by the AMF, and the second NAS message is used to instruct the UE to establish a user plane connection.

18. The method according to claim 17, wherein, The second NAS message includes second indication information, where the second indication information is used to instruct the UE to determine the first indication information according to the second indication information, and / or, the second indication information is used to instruct the UE to determine third indication information according to the second indication information, where the third indication information is used to instruct the AMF to accept the NAS message of the UE.

19. The method according to claim 16 or 17, wherein, the method further includes: the UE determines the first indication information according to user plane information.

20. The method according to claim 15, wherein, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message includes third indication information, where the third indication information is used to instruct the AMF to accept the NAS message of the UE and perform a signaling procedure for establishing a user plane connection corresponding to the first NAS message.

21. The method according to claim 20, wherein, the method further includes: the UE determines the third indication information according to the first indication information; or, the UE determines the third indication information according to user plane information.

22. The method according to claim 21, wherein, the method further includes: the UE sends a third NAS message to the AMF, and the third NAS message is used to instruct the AMF to accept the first non-access stratum NAS message.

23. The method according to claim 22, wherein, the third NAS message includes the first indication information, where the first indication information is used to instruct the AMF to accept the NAS message of the UE.

24. The method according to claim 15, wherein, if the first NAS message includes a PDU session establishment request message or a PDU session modification request message, the first NAS message includes a data network identifier, where the data network identifier is used to instruct the AMF to accept the NAS message of the UE and perform a signaling procedure for establishing a user plane connection corresponding to the first NAS message.

25. A user plane positioning service device, wherein, the device is applied to an access and mobility management function AMF, and the device includes: a receiving module, configured to receive a first non-access stratum NAS message sent by a user equipment UE in a case of signaling congestion, where the first NAS message is used to establish a user plane connection; a establishing module, configured to perform a signaling procedure for establishing a user plane connection according to the first NAS message.

26. A user plane positioning service device, wherein, the device is applied to a user equipment UE, and the device includes: a sending module, configured to send a first non-access stratum NAS message to an access and mobility management function AMF, where the first NAS message is used to instruct the AMF to perform a signaling procedure for establishing a user plane connection in a case of signaling congestion.

27. An access and mobility management function AMF, including: A memory and a processor, the memory storing a computer program, characterized in that when the processor executes the computer program, the steps of the method according to any one of claims 1 to 13 are implemented.

28. A user equipment UE, characterized in that it comprises: a transmitter; The transmitter is configured to send a first non-access stratum NAS message to an access and mobility management function AMF, where the first NAS message is used to instruct the AMF to execute a signaling procedure for establishing a user plane connection when in a signaling congestion state.

29. A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the method according to any one of claims 1-13 or 14-24 are implemented.

30. A computer program product comprising a computer program, characterized in that when the computer program is executed by a processor, the steps of the method according to any one of claims 1-13 or 14-24 are implemented.

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