User plane information interaction method and related device

Abstract

The present disclosure relates to the technical field of wireless communications. Provided are a user plane information interaction method and a related device. The method comprises: a media plane session control function network element acquiring at least one piece of access gateway (AGW) information; and sending one or multiple pieces of AGW information to a mobile communication core network element. The present disclosure enhances an interaction mechanism between a mobile communication core network element and a media plane session control function network element to enable the media plane session control function network element to provide AGW information to the mobile communication core network element, so that after assigning an on-satellite AGW to a terminal, the media plane session control function network element can notify the mobile communication core network element in a timely manner, ensuring that a user plane path always remains on the satellite, thus implementing media services between terminals without involving terrestrial networks.

Description

User face information interaction methods and related devices

[0001] Cross-reference to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202410804718.X, filed on June 20, 2024, entitled “User Face Information Interaction Method and Related Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of communication technology, and in particular to a user plane information interaction method and related equipment. Background Technology

[0004] In current communication standard protocols, the process of the media plane session control function network element selecting the AGW (Access Gateway) is independent of the process of the SMF (Session Management Function) in the core network selecting the UPF (User Plane Function). This makes it difficult to guarantee that the media plane session control function network element and the mobile core network can simultaneously select on-board resources for the terminal. As a result, the demand for media services (such as IMS voice services) in the UE-satellite-UE communication mode cannot be guaranteed, that is, it cannot be guaranteed that user plane data will not pass through the terrestrial network.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] This disclosure provides a user plane information interaction method and related equipment, which at least to some extent overcomes the technical problem in the related art that it is impossible to guarantee that the user plane data of media services in the UE-satellite-UE communication mode does not pass through the terrestrial network.

[0007] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0008] This disclosure provides a user plane information interaction method applied to a media plane session control function network element, including: obtaining at least one access gateway (AGW) information; and sending one or more AGW information to a mobile communication core network element.

[0009] In some embodiments, the method further includes: sending a user plane information subscription request to the mobile communication core network element, wherein the user plane information subscription request is used to request the mobile communication core network element to notify the media plane session control function network element of user plane routing information; and receiving a user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, wherein the user plane information notification message carries user plane routing information.

[0010] In some embodiments, after receiving a user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, the method further includes: returning a first confirmation response message to the mobile communication core network element, wherein the first confirmation response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is available.

[0011] In some embodiments, after receiving a user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, the method further includes: returning a first rejection response message to the mobile communication core network element, wherein the first rejection response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is unavailable.

[0012] In some embodiments, after sending one or more AGW information to a mobile communication core network element, the method further includes: receiving target AGW information returned by the mobile communication core network element; if the target AGW information returned by the mobile communication core network element is available, sending an address allocation request message to the target AGW, so that the target AGW allocates a network communication address to the terminal according to the address allocation request message.

[0013] In some embodiments, the method further includes: receiving a network communication address assigned to the terminal by the target AGW; generating a Session Initiation Protocol (SIP) message carrying the network communication address and sending it to the terminal and other media plane function network elements.

[0014] In some embodiments, after receiving the target AGW information returned by the mobile communication core network element, the method further includes: if the target AGW information returned by the mobile communication core network element is available, then returning a second confirmation response message to the mobile communication core network element, wherein the second confirmation response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is available.

[0015] In some embodiments, after receiving the target AGW information returned by the mobile communication core network element, the method further includes: if the target AGW information returned by the mobile communication core network element is unavailable, deleting the target AGW information and / or returning a second rejection response message to the mobile communication core network element, wherein the second rejection response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function element is unavailable.

[0016] In some embodiments, the network communication address includes: IP address and / or port number.

[0017] In some embodiments, the second confirmation response message carries the network communication address allocated by the target AGW to the terminal; the mobile communication core network element is also used to complete the configuration of user plane routing information according to the network communication address allocated by the target AGW to the terminal, and return the activated user plane routing information to the media plane session control function network element.

[0018] In some embodiments, the method further includes: receiving activated user plane routing information returned by the mobile communication core network element; and completing the media plane session establishment process based on the activated user plane routing information.

[0019] In some embodiments, the media plane session control function network element is the proxy call session control function (P-CSCF) network element within the IP Multimedia Subsystem (IMS) network.

[0020] In some embodiments, the mobile communication core network element is a 5G core network element, and the 5G core network element includes at least one of the following: Session Management Function (SMF) network element, Policy Control Function (PCF) network element, and Network Open Function (NEF) network element.

[0021] In some embodiments, the SMF network element notifying the P-CSCF network element of user plane routing information includes any one of the following: the SMF network element directly sends user plane routing information to the P-CSCF network element; the SMF network element sends user plane routing information to the PCF network element, and then forwards it to the P-CSCF network element via the PCF network element; the SMF network element sends user plane routing information to the NEF network element, and then forwards it to the PCF network element via the NEF network element, and then forwards it to the P-CSCF network element via the PCF network element.

[0022] In some embodiments, sending one or more AGW information to a mobile communication core network element includes any one of the following: sending one or more AGW information to the PCF network element so that the PCF network element sends one or more AGW information to the SMF network element; or sending one or more AGW information to the SMF network element.

[0023] In some embodiments, the triggering conditions for the SMF network element to notify the P-CSCF network element of user plane routing information include at least one of the following: the SMF network element selects a UPF network element; the SMF network element reselects a UPF network element; the SMF network element adds a UPF network element.

[0024] In some embodiments, the UPF network element is deployed on a non-terrestrial carrier. In one embodiment, the non-terrestrial carrier for deploying the UPF network element is a satellite in regeneration mode.

[0025] In some embodiments, the AGW is deployed on a non-terrestrial platform, and the AGW information includes: an identifier of the non-terrestrial platform where the AGW is located. In one embodiment, the non-terrestrial platform on which the AGW is deployed is a satellite in regeneration mode.

[0026] According to another aspect of this disclosure, a user plane information interaction method is also provided, applied to a mobile communication core network element, comprising: acquiring one or more AGW information sent by a media plane session control function network element, wherein the media plane session control function network element is a network element within a multimedia service network used to select an AGW.

[0027] In some embodiments, the method further includes: receiving a user plane information subscription request sent by the media plane session control function network element, wherein the user plane information subscription request is used to request the mobile communication core network element to notify the media plane session control function network element of user plane routing information; and sending a user plane information notification message to the media plane session control function network element, wherein the user plane information notification message carries user plane routing information.

[0028] In some embodiments, after sending a user plane information notification message to the media plane session control function network element, the method further includes: receiving a first confirmation response message returned by the media plane session control function network element, wherein the first confirmation response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is available.

[0029] In some embodiments, after sending a user plane information notification message to the media plane session control function network element, the method further includes: receiving a first rejection response message returned by the media plane session control function network element, wherein the first rejection response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is unavailable.

[0030] In some embodiments, after obtaining one or more AGW information sent by the media plane session control function network element, the method further includes: returning target AGW information to the media plane session control function network element, wherein the media plane session control function network element is configured to: if the target AGW information returned by the mobile communication core network element is available, send an address allocation request message to the target AGW, wherein the target AGW is configured to allocate a network communication address to the terminal according to the address allocation request message, generate a Session Initiation Protocol (SIP) message carrying the network communication address, and send it to the terminal or other media plane function network elements.

[0031] In some embodiments, the media plane session control function network element is further configured to: if the target AGW information returned by the mobile communication core network element is available, return a second confirmation response message to the mobile communication core network element, wherein the second confirmation response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is available.

[0032] In some embodiments, the media plane session control function network element is further configured to: delete the target AGW information and / or return a second rejection response message to the mobile communication core network element if the target AGW information returned by the mobile communication core network element is unavailable, wherein the second rejection response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is unavailable.

[0033] In some embodiments, the network communication address includes: IP address and / or port number.

[0034] In some embodiments, the second confirmation response message carries a network communication address allocated by the target AGW to the terminal; the method further includes: configuring user plane routing information according to the network communication address allocated by the target AGW to the terminal; and returning activated user plane routing information to the media plane session control function network element so that the media plane session control function network element completes the media plane session establishment process according to the activated user plane routing information.

[0035] In some embodiments, the media plane session control function network element is the proxy call session control function P-CSCF network element within the IP Multimedia Subsystem (IMS) network; the mobile communication core network element is the session management function (SMF) network element of the 5G core network.

[0036] In some embodiments, the SMF network element notifying the P-CSCF network element of user plane routing information includes any one of the following: user plane routing information sent directly by the SMF network element to the P-CSCF network element; user plane routing information sent by the SMF network element to the PCF network element and then forwarded by the PCF network element to the P-CSCF network element; user plane routing information sent by the SMF network element to the NEF network element and then forwarded by the NEF network element to the PCF network element and then forwarded by the PCF network element to the P-CSCF network element.

[0037] In some embodiments, obtaining one or more AGW information sent by a media plane session control function network element includes: receiving one or more AGW information forwarded by a PCF network element, wherein the AGW information forwarded by the PCF network element is the AGW information selected by the media plane session control function network element.

[0038] In some embodiments, the triggering conditions for the SMF network element to notify the P-CSCF network element of user plane routing information include at least one of the following: the SMF network element selects a UPF network element; the SMF network element reselects a UPF network element; the SMF network element adds a UPF network element.

[0039] In some embodiments, the UPF network element is deployed on a non-terrestrial carrier.

[0040] In some embodiments, the non-terrestrial carrier is a satellite in regeneration mode.

[0041] In some embodiments, the AGW is deployed on a non-ground carrier, and the AGW information includes: the identifier of the non-ground carrier where the AGW is located.

[0042] In some embodiments, after acquiring one or more AGW information sent by the media plane session control function network element, the method further includes: determining target AGW information, wherein the target AGW information is AGW information selected by the mobile communication core network element from the received one or more AGW information; based on the pre-acquired mapping relationship between non-terrestrial carrier identifiers and data network identifiers (DNAIs), searching for the data network identifier (DNAI) corresponding to the target AGW according to the non-terrestrial carrier identifier where the target AGW is located; and selecting a target UPF network element that meets preset conditions according to the DNAI corresponding to the target AGW.

[0043] In some embodiments, the target UPF network element includes at least one of the following: a UPF network element deployed on a first non-terrestrial carrier, wherein the first non-terrestrial carrier is the non-terrestrial carrier currently accessed by the terminal; a UPF network element deployed on a second non-terrestrial carrier, wherein the second non-terrestrial carrier is the UPF network element on the non-terrestrial carrier where the target AGW is located; a UPF network element deployed on a third non-terrestrial carrier, wherein the third non-terrestrial carrier is the non-terrestrial carrier closest to the first non-terrestrial carrier; and a UPF network element deployed on a fourth non-terrestrial carrier, wherein the fourth non-terrestrial carrier is the non-terrestrial carrier closest to the third non-terrestrial carrier.

[0044] In some embodiments, the non-terrestrial carrier is a satellite in regeneration mode.

[0045] According to another aspect of this disclosure, a media plane session control function network element is also provided, including: a first AGW information acquisition module, configured to acquire at least one access gateway AGW information; and an AGW information sending module, configured to send one or more AGW information to a mobile communication core network element.

[0046] According to another aspect of this disclosure, a session management function network element is also provided, including: a second AGW information acquisition module, configured to acquire one or more AGW information sent by a media plane session control function network element, wherein the media plane session control function network element is a network element within a multimedia service network used for selecting AGWs.

[0047] According to another aspect of this disclosure, a policy control function network element is also provided, including: a third AGW information acquisition module, configured to acquire one or more AGW information sent by a media plane session control function network element, wherein the media plane session control function network element is a network element within a multimedia service network used for selecting AGWs.

[0048] According to another aspect of this disclosure, an electronic device is also provided, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform the user plane information interaction method described in any of the preceding claims by executing the executable instructions.

[0049] According to another aspect of this disclosure, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the user plane information interaction method described in any of the preceding claims.

[0050] According to another aspect of this disclosure, a computer program product is also provided, comprising: a computer program or instructions that, when executed by a processor, implement the user plane information interaction method described in any of the preceding claims.

[0051] The user plane information interaction method and related equipment provided in the embodiments of this disclosure, after the media plane session control function network element obtains at least one access gateway AGW information, sends one or more AGW information to the mobile communication core network element. In this embodiment, by enhancing the interaction mechanism between the mobile communication core network element and the media plane session control function network element, the media plane session control function network element provides AGW information to the mobile communication core network element. This allows the media plane session control function network element to promptly notify the mobile communication core network element after allocating an on-board AGW for the terminal, ensuring that the user plane path always remains on the satellite, and enabling media services between terminals without traversing a terrestrial network.

[0052] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0053] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0054] Figure 1 shows a schematic diagram of a media service system architecture under a satellite communication mode in related technologies;

[0055] Figure 2 shows a flowchart of a user face information interaction method according to an embodiment of the present disclosure;

[0056] Figure 3 shows a flowchart of an optional user face information interaction method in an embodiment of this disclosure;

[0057] Figure 4 shows a flowchart of another user face information interaction method in an embodiment of this disclosure;

[0058] Figure 5 shows a schematic diagram of the user plane data path of a media service under a satellite communication mode in an embodiment of this disclosure;

[0059] Figure 6 shows a flowchart of an IMS providing AWG information to a 5GC in an embodiment of this disclosure;

[0060] Figure 7 shows a flowchart of another user face information interaction method in an embodiment of this disclosure;

[0061] Figure 8 shows a flowchart of another optional user face information interaction method in an embodiment of this disclosure;

[0062] Figure 9 shows a flowchart of another optional user face information interaction method in an embodiment of this disclosure;

[0063] Figure 10 shows a schematic diagram of a media plane session control function network element in an embodiment of this disclosure;

[0064] Figure 11 shows a schematic diagram of a session management function network element in an embodiment of this disclosure;

[0065] Figure 12 shows a schematic diagram of a policy control function network element in an embodiment of this disclosure;

[0066] Figure 13 shows a structural block diagram of an electronic device according to an embodiment of the present disclosure. Detailed Implementation

[0067] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0068] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0069] To facilitate understanding, before introducing the embodiments of this disclosure, the following explanations are provided for several terms involved in the embodiments of this disclosure:

[0070] Transparent mode: A data processing mode in satellite communication. In transparent mode, the satellite does not process the received signal but directly retransmits it, similar to a signal relay station. In transparent mode, the satellite does not interfere with the signal; it simply forwards it, and the content and characteristics of the signal remain unchanged.

[0071] Regeneration mode: Another data processing mode for satellite communication. In regeneration mode, the satellite regenerates, amplifies, and remodulates the received signal before relaying it. Through satellite signal processing, signal loss and noise are reduced, thereby improving signal quality.

[0072] AWG: Access Gateway.

[0073] IMS: IP Multimedia Subsystem.

[0074] P-CSCF: Proxy-Call Session Control Function.

[0075] SMF: Session Management Function.

[0076] PCF: Policy Control Function.

[0077] UPF: User Plane Function.

[0078] DNAI: Data Network Access Identifier.

[0079] The specific implementation methods of the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0080] Current communication standards only allow terminals to connect to terrestrial base stations via transparent satellite to achieve seamless coverage. However, due to various limitations, it is difficult to deploy ground gateway stations for connecting WeChat and terrestrial networks in some areas, resulting in continued geographical restrictions on communication services.

[0081] The aforementioned problems can be solved by integrating terrestrial base stations with satellites in regenerative mode, and a range of value-added services can be provided to terminals. Specifically, the UE (User Equipment, also known as a user terminal or terminal)-satellite-UE communication service allows user plane data to be communicated between UEs on-board without passing through a terrestrial network, under the coverage of one or more serving satellites, as shown in Figure 1. The UE-satellite-UE communication service can effectively eliminate dependence on terrestrial gateway stations, reduce user plane latency, and provide potential service scenarios for future space-air-ground communication. At the same time, it also requires the network to have the capability to deploy UPFs on satellites.

[0082] Terrestrial media services in related technologies heavily rely on IMS. To achieve a smooth migration of VoLTE and VoNR users to 5GNTN (Non-Terrestrial Network) networks, future communication standard protocols will further investigate the support of UE-satellite-UE communication systems for media services (such as IMS voice services). For operators, IMS voice services impose clear requirements on the deployment of AGW (Automatic Guided Vehicle) along the UE's media path to support a series of critical functions, including but not limited to transcoding, secure isolation from the IMS core network, lawful interception, and data retention. Therefore, to implement IMS voice services in the UE-satellite-UE communication mode, the network must have the capability to deploy AGW on the satellite.

[0083] In current technical solutions, after the UE completes the IMS PDU session establishment in the core network (such as 5GC), it initiates a registration and session establishment request to IMS. During this process, the P-CSCF (Proxy-Call Session Control Function) selection of the AGW and the SMF selection of the UPF are independent of each other. This makes it difficult to guarantee that IMS and the core network (such as 5GC) simultaneously select on-board equipment resources for the user. Consequently, the IMS voice service requirements in the UE-satellite-UE communication mode cannot be guaranteed, meaning that user plane data cannot be guaranteed to not pass through the terrestrial network.

[0084] The user plane information interaction method provided in this embodiment enhances the interaction mechanism between the mobile communication core network element and the media plane session control function network element. The media plane session control function network element provides AGW information to the mobile communication core network element, so that after the media plane session control function network element allocates on-board AGW to the terminal, it can promptly notify the mobile communication core network element, ensuring that the user plane path always remains on the satellite, and realizing media services between terminals without passing through the terrestrial network.

[0085] Under the above-described inventive concept, the user plane information interaction method in this disclosure embodiment can, in principle, be executed by any electronic device with computing processing capabilities. In some embodiments, the user plane information interaction method provided in this disclosure embodiment can be executed by a media plane session control function network element; in other embodiments, the user plane information interaction method provided in this disclosure embodiment can be implemented by the media plane session control function network element and the mobile communication core network element through interaction.

[0086] Figure 2 shows a flowchart of a user face information interaction method according to an embodiment of the present disclosure. As shown in Figure 2, the user face information interaction method provided in this embodiment of the present disclosure includes the following steps:

[0087] S202, Obtain at least one access gateway (AGW) information.

[0088] S204, send one or more AGW messages to the mobile communication core network element.

[0089] In some embodiments, as shown in FIG3, after sending one or more AGW information to the mobile communication core network element, the user plane information interaction method provided in this embodiment of the present disclosure further includes the following steps:

[0090] S206, Receive target AGW information returned by the mobile communication core network element;

[0091] S208, if the target AGW information returned by the mobile communication core network element is available, then send an address allocation request message to the target AGW so that the target AGW allocates a network communication address to the terminal according to the address allocation request message.

[0092] In some embodiments, as shown in FIG3, the user face information interaction method provided in this disclosure embodiment further includes the following steps:

[0093] S210, Receive the network communication address assigned to the terminal by the target AGW;

[0094] S212, generate a Session Initiation Protocol (SIP) message carrying the network communication address and send it to the terminal and other media plane functional network elements.

[0095] It should be noted that the network communication address in this embodiment can be any address that can be used for network communication. In some embodiments, it may include, but is not limited to, IP address and / or port number.

[0096] In some embodiments, after receiving the target AGW information returned by the mobile communication core network element, as shown in FIG3, the user plane information interaction method provided in this embodiment may further include the following steps:

[0097] S214, if the target AGW information returned by the mobile communication core network element is available, a second confirmation response message is returned to the mobile communication core network element, wherein the second confirmation response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function element is available.

[0098] Furthermore, in some embodiments, the second confirmation response message carries the network communication address assigned to the terminal by the target AGW; the mobile communication core network element is also used to complete the configuration of user plane routing information according to the network communication address assigned to the terminal by the target AGW, and return the activated user plane routing information to the media plane session control function network element.

[0099] Furthermore, in some embodiments, the user plane information interaction method provided in this disclosure may further include the following steps: receiving activated user plane routing information returned by a mobile communication core network element; and completing the media plane session establishment process based on the activated user plane routing information.

[0100] In some embodiments, after receiving the target AGW information returned by the mobile communication core network element, as shown in FIG3, the user plane information interaction method provided in this embodiment may further include the following steps:

[0101] S216, if the target AGW information returned by the mobile communication core network element is unavailable, then delete the target AGW information and / or return a second rejection response message to the mobile communication core network element, wherein the second rejection response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function element is unavailable.

[0102] In some embodiments, as shown in FIG4, the user plane information interaction method provided in this disclosure embodiment may further include the following steps:

[0103] S402, Send a user plane information subscription request to the mobile communication core network element, wherein the user plane information subscription request is used to request the mobile communication core network element to notify the media plane session control function element of user plane routing information;

[0104] S404, Receive user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, wherein the user plane information notification message carries user plane routing information.

[0105] Furthermore, in some embodiments, after receiving the user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, as shown in FIG3, the user plane information interaction method provided in this embodiment may further include the following steps:

[0106] S406, return a first confirmation response message to the mobile communication core network element, wherein the first confirmation response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function element is available.

[0107] Furthermore, in some embodiments, after receiving the user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, as shown in FIG3, the user plane information interaction method provided in this embodiment may further include the following steps:

[0108] S408, return a first rejection response message to the mobile communication core network element, wherein the first rejection response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function element is unavailable.

[0109] In some embodiments of this disclosure, the media plane session control function network element may be the proxy call session control function (P-CSCF) network element within the IP Multimedia Subsystem (IMS) network.

[0110] In some embodiments of this disclosure, the mobile communication core network element is a 5G core network element, which may include, but is not limited to, at least one of the following: Session Management Function (SMF) network element, Policy Control Function (PCF) network element, and Network Open Function (NEF) network element.

[0111] In some embodiments, the SMF network element notifies the P-CSCF network element of user plane routing information including any of the following: In some embodiments, the UPF network element in this disclosure is deployed on a non-terrestrial carrier. In one embodiment, the non-terrestrial carrier deploying the UPF network element may be a satellite in regenerative mode.

[0112] In some embodiments, the AGW in this disclosure is deployed on a non-terrestrial carrier, and the AGW information may include, but is not limited to, the identifier of the non-terrestrial carrier where the AGW is located. In one embodiment, the non-terrestrial carrier where the AGW is deployed may be a satellite in regeneration mode.

[0113] In some embodiments, the SMF network element notifies the P-CSCF network element of user plane routing information in any of the following ways: ① The SMF network element directly sends user plane routing information to the P-CSCF network element; ② The SMF network element sends user plane routing information to the PCF network element, and then forwards it to the P-CSCF network element via the PCF network element; ③ The SMF network element sends user plane routing information to the NEF network element, and then forwards it to the PCF network element via the NEF network element, and then forwards it to the P-CSCF network element via the PCF network element.

[0114] In some embodiments, sending one or more AGW information to a mobile communication core network element includes any one of the following: sending one or more AGW information to a PCF network element so that the PCF network element sends one or more AGW information to an SMF network element; or sending one or more AGW information to an SMF network element.

[0115] In some embodiments, the triggering conditions for an SMF network element to notify a P-CSCF network element of user plane routing information may include, but are not limited to, at least one of the following: the SMF network element selects a UPF network element; the SMF network element reselects a UPF network element; the SMF network element adds a UPF network element.

[0116] In some embodiments, the UPF network element in this disclosure is deployed on a non-terrestrial carrier. In one embodiment, the non-terrestrial carrier for deploying the UPF network element may be a satellite in regenerative mode.

[0117] In some embodiments, the AGW in this disclosure is deployed on a non-terrestrial carrier, and the AGW information may include, but is not limited to, the identifier of the non-terrestrial carrier where the AGW is located. In one embodiment, the non-terrestrial carrier where the AGW is deployed may be a satellite in regeneration mode.

[0118] The user plane information interaction method provided in this embodiment enables the IMS to provide onboard AGW information to the 5GC. By enhancing the interaction mechanism between the P-CSCF, PCF, and SMF, the P-CSCF can notify the SMF before allocating an onboard AGW to a user and wait for confirmation from the SMF before performing subsequent operations. Simultaneously, the P-CSCF can subscribe to user plane path change events. When the SMF selects, reselects, adds, or changes a UPF for a user, it can notify the P-CSCF and perform subsequent operations only after receiving a response from the P-CSCF.

[0119] Furthermore, to prevent frequent switching of the onboard PSA UPF due to the continuous movement of the satellite, which would lead to constant changes in the IP addresses assigned to users, causing user re-registration and service interruption, this technical solution considers selecting a ground-based PSA UPF for users and, by inserting onboard UL CL and L PSA UPF, still ensuring that user plane routing remains on the satellite. The solution provided in this embodiment can achieve the user plane data path shown in Figure 5, ensuring that the user plane path always remains on the satellite.

[0120] Figure 6 shows a flowchart of an IMS providing AWG information to a 5GC according to an embodiment of this disclosure. As shown in Figure 6, it specifically includes:

[0121] S602, Pre-selection of on-board AGW: When the P-CSCF determines that the IMS can perform on-board communication for the UE, the P-CSCF can pre-select one or more available on-board AGWs based on the access information provided by the 5GC, such as the regeneration mode satellite identifiers of both parties and the configured satellite constellation information, such as the ephemeris chart.

[0122] The pre-selection method includes, but is not limited to: based on the deployment of AGWs on satellites, prioritizing the AGWs on the regeneration mode satellites currently accessed by the UE, and selecting on-board AGWs that are close to the regeneration mode satellites accessed by both parties.

[0123] S604 provides onboard AGW information and subscribes to user plane path management events: The P-CSCF sends pre-selected onboard AGW information to the PCF and subscribes to user plane path management events and / or user plane path change events. Communication methods include, but are not limited to: the P-CSCF calling Npcf_PolicyAuthorization_Update. Onboard AGW information includes, but is not limited to: the satellite identifier where the onboard AGW is located.

[0124] S606, Update the SM Policy (on-board AGW information) of the corresponding PDU session: The PCF updates the SM Policy of the corresponding PDU session to the SMF, carrying one or more pre-selected on-board AGW information, and subscriptions to user plane path management events and / or user plane path change events.

[0125] S608, DNAI Mapping: After receiving the on-board AGW information, the SMF can infer that the IMS can provide on-board communication services for the UE. If the 5GC can provide on-board UPF resources for the UE, it can determine the corresponding DNAI based on the on-board AGW information. Methods for the SMF to determine that the 5GC can provide on-board UPF resources for the UE include, but are not limited to: determining that there is an on-board UPF in the current network that can connect to a regenerable mode satellite that the current UE can access, or that is nearby. The method for determining the DNAI can be based on the mapping relationship between the satellite ID where the on-board AGW is located and the DNAI.

[0126] S610, Selecting the On-board L-PSA UPF: The SMF determines one or more available AGW information based on the received one or more AGW information. If the SMF selects multiple AGW information, the SMF will perform steps 3-7 with the P-CSCF until a target AGW is finally determined. The SMF determines the DNAI mapped to the target AGW and selects the corresponding UPF, inserting it as the L-PSA UPF. The methods for the SMF to select the target AGW include, but are not limited to: based on the deployment of the UPF on the satellite, prioritizing the UPF on the regeneration mode satellite currently accessed by the UE, selecting the UPF on the satellite where the AGW is located, and selecting the on-board UPF that is close to both the regeneration mode satellite currently accessed by the UE and the satellite where the AGW is located.

[0127] S612, Determine onboard AGW information: SMF determines the corresponding AGW information based on the selected L-PSA UPF.

[0128] S614, Notifying the P-CSCF of the selected on-board AGW information before configuring the L-PSA UPF: The SMF notifies the P-CSCF of the selected target AGW before configuring the L-PSA UPF. Notification methods include, but are not limited to: SMF-PCF-P-CSCF, SMF-P-CSCF, SMF-NEF-PCF-P-CSCF.

[0129] S616, Request the on-board AGW to allocate resources for the UE: The P-CSCF requests the on-board AGW to allocate resources for the UE and obtains the address allocated to the UE by the on-board AGW.

[0130] S618, SIP Message (address assigned by the onboard AGW): The P-CSCF replaces the address originally assigned to the UE by the AGW with the address assigned to the UE by the onboard AGW, and sends a SIP message carrying the new address to the UE. Upon receiving the SIP message acknowledged by the UE, the P-CSCF will trigger each IMS network element in the IMS session establishment process to complete the replacement of the new address.

[0131] S620, Confirmation Response (Address Assigned by the Onboard AGW): The P-CSCF sends an confirmation response to the SMF, carrying the new address assigned to the UE by the onboard AGW. This step can also be performed after obtaining the address in step 9. The method by which the P-CSCF sends the confirmation response to the SMF is the same as in step 7.

[0132] S622, Configure the on-board L-PSA UPF: After receiving the acknowledgment response from the P-CSCF, the SMF completes the configuration of the on-board L-PSA UPF.

[0133] S624, Selecting the Onboard UL CL: The SMF selects an available onboard UPF as the UL CL. The selection method includes, but is not limited to: selecting the UL CL co-located with the L-PSA UPF based on the deployment of the UPF on the satellite; selecting the UPF that is close to the regeneration mode satellite accessed by the current UE; and selecting the onboard UPF that is close to both the regeneration mode satellite accessed by the current UE and the satellite where the L-PSA UPF is located.

[0134] S626, Configure on-board ULCL forwarding rules: Complete the configuration of ULCL forwarding rules based on the address assigned to the UE by the on-board AGW.

[0135] S628, after activating the user plane path, notify P-CSCF: after activating the user plane path, notify P-CSCF.

[0136] S630, complete the on-board IMS session establishment process: P-CSCF continues to complete the on-board IMS session establishment process.

[0137] S632, UE starts on-board communication, data plane path UE-satellite-UE: User starts on-board communication, user plane data plane path is shown in Figure 5.

[0138] In this disclosed example, the P-CSCF provides AGW information to the PCF, including but not limited to calling the Npcf_PolicyAuthorization_Update service operation. AGW information includes, but is not limited to, the satellite identifier where the AGW is located. The P-CSCF subscribes to 5GC user plane path management / change events, including but not limited to calling the Npcf_PolicyAuthorization_Update service operation. The P-CSCF provides one or more available AGW information to the SMF and receives one or more AGW information provided by the SMF. When the AGW information provided by the SMF is unavailable, the P-CSCF will delete the AGW information in the negotiation message with the 5GC or send a rejection response. After determining the target AGW to use, the P-CSCF will request that AGW allocate resources for the user and release the resources originally allocated to the user by the original AGW, including but not limited to, IP address and port number. The P-CSCF may send a SIP message carrying the new address to the UE and other IMS network elements (e.g., the peer P-CSCF). The P-CSCF carries the new address to the SMF in the confirmation response message. The P-CSCF will not complete the IMS session establishment process until it receives a "User Plane Path Activated" response from the SMF. After configuring or activating the user plane path, the SMF notifies the P-CSCF via methods including, but not limited to, sending the notification through the PCF to the P-CSCF, sending it through the NEF to the PCF and then to the P-CSCF, or sending it directly to the P-CSCF. Upon receiving the AGW information, the SMF can infer that IMS supports UE-Satellite-UE communication for the UE. The SMF contains a mapping relationship between AGW information and DNAI, enabling the SMF to confirm the corresponding DNAI based on the AGW information and the corresponding UPF based on the DNAI. The SMF selects a suitable UPF based on the AGW information, using methods including, but not limited to, selecting the UPF on the regeneration mode satellite currently accessed by the UE, selecting the UPF on the satellite where the AGW is located, or selecting an on-board UPF that is close to both the regeneration mode satellite currently accessed by the UE and the satellite where the AGW is located.

[0139] Based on the same inventive concept, this disclosure also provides a user plane information interaction method. In principle, this method can be executed by any electronic device with computing capabilities. In some embodiments, the user plane information interaction method provided in this disclosure can be executed by a mobile communication core network element; in other embodiments, the user plane information interaction method provided in this disclosure can be implemented by the interaction between the mobile communication core network element and the media plane session control function network element.

[0140] Figure 7 shows a flowchart of another user face information interaction method in an embodiment of this disclosure. As shown in Figure 7, the user face information interaction method provided in this embodiment of the disclosure includes the following steps:

[0141] S702, obtain one or more AGW information sent by the media plane session control function network element. The media plane session control function network element is the network element used to select AGW in the multimedia service network.

[0142] In some embodiments, after obtaining one or more AGW information sent by the media plane session control function network element, as shown in FIG8, the user plane information interaction method provided in this embodiment of the present disclosure may further include the following steps:

[0143] S704, Determine the target AGW information, wherein the target AGW information is the AGW information selected by the mobile communication core network element from one or more received AGW information;

[0144] S706, based on the pre-acquired mapping relationship between non-ground carrier identifiers and data network identifiers (DNAI), find the data network identifier (DNAI) corresponding to the target AGW according to the non-ground carrier identifier of the target AGW corresponding to the target AGW information;

[0145] S708 selects the target UPF network element that meets the preset conditions based on the DNAI corresponding to the target AGW.

[0146] In some embodiments, the target UPF network element in this disclosure may include, but is not limited to, at least one of the following: a UPF network element deployed on a first non-terrestrial carrier, wherein the first non-terrestrial carrier is the non-terrestrial carrier currently accessed by the terminal; a UPF network element deployed on a second non-terrestrial carrier, wherein the second non-terrestrial carrier is the UPF network element on the non-terrestrial carrier where the target AGW is located; a UPF network element deployed on a third non-terrestrial carrier, wherein the third non-terrestrial carrier is the non-terrestrial carrier closest to the first non-terrestrial carrier; and a UPF network element deployed on a fourth non-terrestrial carrier, wherein the fourth non-terrestrial carrier is the non-terrestrial carrier closest to the third non-terrestrial carrier.

[0147] In some embodiments, after determining the target AGW information, as shown in FIG8, the user plane information interaction method provided in this disclosure embodiment may further include the following steps:

[0148] S710, return target AGW information to the media plane session control function network element, wherein the media plane session control function network element is used to: if the target AGW information returned by the mobile communication core network element is available, send an address allocation request message to the target AGW, wherein the target AGW is used to allocate a network communication address to the terminal according to the address allocation request message, generate a Session Initiation Protocol (SIP) message carrying the network communication address, and send it to the terminal or other media plane function network elements.

[0149] It should be noted that the network communication address in this embodiment can be any address that can be used for network communication. In some embodiments, it may include, but is not limited to, IP address and / or port number.

[0150] Furthermore, in some embodiments, the second confirmation response message carries the network communication address assigned to the terminal by the target AGW; as shown in FIG8, the user plane information interaction method provided in this embodiment may further include the following steps:

[0151] S712 completes the configuration of user plane routing information based on the network communication address assigned to the terminal by the target AGW;

[0152] S714 returns activated user plane routing information to the media plane session control function network element, so that the media plane session control function network element can complete the media plane session establishment process based on the activated user plane routing information.

[0153] In some embodiments, the media plane session control function network element is further configured to: if the target AGW information returned by the mobile communication core network element is available, return a second confirmation response message to the mobile communication core network element, wherein the second confirmation response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is available.

[0154] In some embodiments, the media plane session control function network element is further configured to: delete the target AGW information and / or return a second rejection response message to the mobile communication core network element if the target AGW information returned by the mobile communication core network element is unavailable, wherein the second rejection response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is unavailable.

[0155] In some embodiments, as shown in FIG9, the user face information interaction method provided in this disclosure embodiment may further include the following steps:

[0156] S902, a user plane information subscription request is received from the media plane session control function network element. The user plane information subscription request is used to request the mobile communication core network element to notify the media plane session control function network element of user plane routing information.

[0157] S904 sends a user plane information notification message to the media plane session control function network element, wherein the user plane information notification message carries user plane routing information.

[0158] In some embodiments, after sending a user plane information notification message to the media plane session control function network element, as shown in FIG9, the user plane information interaction method provided in this embodiment may further include the following steps:

[0159] S906, receive a first acknowledgment response message returned by the media plane session control function network element, wherein the first acknowledgment response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is available.

[0160] In some embodiments, after sending a user plane information notification message to the media plane session control function network element, as shown in FIG9, the user plane information interaction method provided in this embodiment may further include the following steps:

[0161] S908, receive a first rejection response message returned by the media plane session control function network element, wherein the first rejection response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is unavailable.

[0162] In some embodiments of this disclosure, the media plane session control function network element may be the proxy call session control function P-CSCF network element within the IP Multimedia Subsystem (IMS) network; the mobile communication core network element may be the session management function (SMF) network element of the 5G core network.

[0163] In some embodiments, the SMF network element notifies the P-CSCF network element of user plane routing information in any of the following ways: ① The SMF network element directly sends user plane routing information to the P-CSCF network element; ② The SMF network element sends user plane routing information to the PCF network element, and then forwards it to the P-CSCF network element via the PCF network element; ③ The SMF network element sends user plane routing information to the NEF network element, and then forwards it to the PCF network element via the NEF network element, and then forwards it to the P-CSCF network element via the PCF network element.

[0164] In some embodiments, when the mobile communication core network element is an SMF network element of the 5G core network, in the above S702, the SMF network element can receive one or more AGW information forwarded by the PCF network element, wherein the AGW information forwarded by the PCF network element is the AGW information selected by the media plane session control function network element.

[0165] In some embodiments, the triggering conditions for an SMF network element to notify a P-CSCF network element of user plane routing information include at least one of the following: the SMF network element selects a UPF network element; the SMF network element reselects a UPF network element; the SMF network element adds a UPF network element.

[0166] In some embodiments, the UPF network element in this disclosure is deployed on a non-terrestrial carrier. In one embodiment, the non-terrestrial carrier for deploying the UPF network element may be a satellite in regenerative mode.

[0167] In some embodiments, the AGW in this disclosure is deployed on a non-terrestrial carrier, and the AGW information may include, but is not limited to, the identifier of the non-terrestrial carrier where the AGW is located. In one embodiment, the non-terrestrial carrier where the AGW is deployed may be a satellite in regeneration mode.

[0168] Based on the same inventive concept, this disclosure also provides a media plane session control function network element, as described in the following embodiments. Since the principle by which this network element embodiment solves the problem is similar to that of the above method embodiments, the implementation of this network element embodiment can refer to the implementation of the above method embodiments, and repeated details will not be elaborated further.

[0169] Figure 10 shows a schematic diagram of a media plane session control function network element in an embodiment of the present disclosure. As shown in Figure 10, the media plane session control function network element may include: a first AGW information acquisition module 1001, configured to acquire at least one access gateway AGW information; and an AGW information sending module 1002, configured to send one or more AGW information to a mobile communication core network element.

[0170] In some embodiments, as shown in FIG10, the media plane session control function network element provided in this embodiment may further include: a core network interaction module 1003, configured to receive target AGW information returned by a mobile communication core network element; and an AGW interaction module 1004, configured to send an address allocation request message to the target AGW if the target AGW information returned by the mobile communication core network element is available, so that the target AGW allocates a network communication address to the terminal according to the address allocation request message.

[0171] In some embodiments, the AGW interaction module 1004 is further configured to receive the network communication address assigned to the terminal by the target AGW; the core network interaction module 1003 is further configured to generate a Session Initiation Protocol (SIP) message carrying the network communication address and send it to the terminal and other media plane functional network elements.

[0172] It should be noted that the network communication address in this embodiment can be any address that can be used for network communication. In some embodiments, it may include, but is not limited to, IP address and / or port number.

[0173] In some embodiments, the core network interaction module 1003 is further configured to: if the target AGW information returned by the mobile communication core network element is available, then return a second confirmation response message to the mobile communication core network element, wherein the second confirmation response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function element is available.

[0174] Furthermore, in some embodiments, the second confirmation response message carries the network communication address assigned to the terminal by the target AGW; the mobile communication core network element is also used to complete the configuration of user plane routing information according to the network communication address assigned to the terminal by the target AGW, and return the activated user plane routing information to the media plane session control function network element.

[0175] Furthermore, in some embodiments, as shown in FIG10, the media plane session control function network element in this embodiment may further include: a media plane session establishment module 1005, configured to receive activated user plane routing information returned by the mobile communication core network element; and complete the media plane session establishment process according to the activated user plane routing information.

[0176] In some embodiments, the core network interaction module 1003 is further configured to: if the target AGW information returned by the mobile communication core network element is unavailable, delete the target AGW information and / or return a second rejection response message to the mobile communication core network element, wherein the second rejection response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function element is unavailable.

[0177] In some embodiments, the core network interaction module 1003 is further configured to send a user plane information subscription request to a mobile communication core network element, wherein the user plane information subscription request is used to request the mobile communication core network element to notify the media plane session control function element of user plane routing information; and to receive a user plane information notification message sent by the mobile communication core network element to the media plane session control function element, wherein the user plane information notification message carries user plane routing information.

[0178] Furthermore, in some embodiments, the core network interaction module 1003 is further configured to: return a first confirmation response message to the mobile communication core network element, wherein the first confirmation response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function element is available.

[0179] Furthermore, in some embodiments, the core network interaction module 1003 is further configured to: return a first rejection response message to the mobile communication core network element, wherein the first rejection response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function element is unavailable.

[0180] In some embodiments of this disclosure, the media plane session control function network element may be the proxy call session control function (P-CSCF) network element within the IP Multimedia Subsystem (IMS) network.

[0181] In some embodiments of this disclosure, the mobile communication core network element is a 5G core network element, which may include, but is not limited to, at least one of the following: Session Management Function (SMF) network element, Policy Control Function (PCF) network element, and Network Open Function (NEF) network element.

[0182] In some embodiments, the UPF network element in this disclosure is deployed on a non-terrestrial carrier. In one embodiment, the non-terrestrial carrier for deploying the UPF network element may be a satellite in regenerative mode.

[0183] In some embodiments, the AGW in this disclosure is deployed on a non-terrestrial carrier, and the AGW information may include, but is not limited to, the identifier of the non-terrestrial carrier where the AGW is located. In one embodiment, the non-terrestrial carrier where the AGW is deployed may be a satellite in regeneration mode.

[0184] In some embodiments, the SMF network element notifies the P-CSCF network element of user plane routing information in any of the following ways: ① The SMF network element directly sends user plane routing information to the P-CSCF network element; ② The SMF network element sends user plane routing information to the PCF network element, and then forwards it to the P-CSCF network element via the PCF network element; ③ The SMF network element sends user plane routing information to the NEF network element, and then forwards it to the PCF network element via the NEF network element, and then forwards it to the P-CSCF network element via the PCF network element.

[0185] In some embodiments, the AGW information sending module 1002 is further configured to: send one or more AGW information to the PCF network element, so that the PCF network element sends one or more AGW information to the SMF network element; and send one or more AGW information to the SMF network element.

[0186] In some embodiments, the triggering conditions for an SMF network element to notify a P-CSCF network element of user plane routing information may include, but are not limited to, at least one of the following: the SMF network element selects a UPF network element; the SMF network element reselects a UPF network element; the SMF network element adds a UPF network element.

[0187] In some embodiments, the UPF network element in this disclosure is deployed on a non-terrestrial carrier. In one embodiment, the non-terrestrial carrier for deploying the UPF network element may be a satellite in regenerative mode.

[0188] In some embodiments, the AGW in this disclosure is deployed on a non-terrestrial carrier, and the AGW information may include, but is not limited to, the identifier of the non-terrestrial carrier where the AGW is located. In one embodiment, the non-terrestrial carrier where the AGW is deployed may be a satellite in regeneration mode.

[0189] It should be noted that the examples and application scenarios implemented by the various modules in the above-described media plane session control function network element embodiments and the corresponding steps in the method embodiments are the same, but are not limited to the content disclosed in the above-described method embodiments. It should also be noted that the above modules, as part of a device, can be executed in a computer system such as a set of computer-executable instructions.

[0190] Based on the same inventive concept, this disclosure also provides a session management function network element, as described in the following embodiments. Since the principle by which this network element embodiment solves the problem is similar to that of the above method embodiments, the implementation of this network element embodiment can refer to the implementation of the above method embodiments, and repeated details will not be elaborated further.

[0191] Figure 11 shows a schematic diagram of a session management function network element in an embodiment of the present disclosure. As shown in Figure 11, the session management function network element may include: a second AGW information acquisition module 1101, configured to acquire one or more AGW information sent by a media plane session control function network element, wherein the media plane session control function network element is a network element in a multimedia service network used to select AGW.

[0192] In some embodiments, as shown in FIG11, the session management function network element provided in this embodiment may further include: a UPF determination module 1102, configured to: determine target AGW information, wherein the target AGW information is AGW information selected by the mobile communication core network element from one or more received AGW information; based on the pre-acquired mapping relationship between non-terrestrial carrier identifier and data network identifier (DNAI), search for the data network identifier (DNAI) corresponding to the target AGW according to the non-terrestrial carrier identifier where the target AGW is located according to the target AGW information; and select a target UPF network element that meets preset conditions according to the DNAI corresponding to the target AGW.

[0193] In some embodiments, the target UPF network element in this disclosure may include, but is not limited to, at least one of the following: a UPF network element deployed on a first non-terrestrial carrier, wherein the first non-terrestrial carrier is the non-terrestrial carrier currently accessed by the terminal; a UPF network element deployed on a second non-terrestrial carrier, wherein the second non-terrestrial carrier is the UPF network element on the non-terrestrial carrier where the target AGW is located; a UPF network element deployed on a third non-terrestrial carrier, wherein the third non-terrestrial carrier is the non-terrestrial carrier closest to the first non-terrestrial carrier; and a UPF network element deployed on a fourth non-terrestrial carrier, wherein the fourth non-terrestrial carrier is the non-terrestrial carrier closest to the third non-terrestrial carrier.

[0194] In some embodiments, as shown in FIG11, the session management function network element provided in this embodiment may further include: a media plane interaction module 1103, configured to return target AGW information to the media plane session control function network element, wherein the media plane session control function network element is used to: if the target AGW information returned by the mobile communication core network element is available, send an address allocation request message to the target AGW, wherein the target AGW is used to allocate a network communication address to the terminal according to the address allocation request message, generate a Session Initiation Protocol (SIP) message carrying the network communication address, and send it to the terminal or other media plane function network elements.

[0195] It should be noted that the network communication address in this embodiment can be any address that can be used for network communication. In some embodiments, it may include, but is not limited to, IP address and / or port number.

[0196] Furthermore, in some embodiments, the second confirmation response message carries the network communication address allocated by the target AGW to the terminal; the media plane interaction module 1103 is also configured to: complete the configuration of user plane routing information according to the network communication address allocated by the target AGW to the terminal; and return the activated user plane routing information to the media plane session control function network element so that the media plane session control function network element completes the media plane session establishment process according to the activated user plane routing information.

[0197] In some embodiments, the media plane session control function network element is further configured to: if the target AGW information returned by the mobile communication core network element is available, return a second confirmation response message to the mobile communication core network element, wherein the second confirmation response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is available.

[0198] In some embodiments, the media plane session control function network element is further configured to: delete the target AGW information and / or return a second rejection response message to the mobile communication core network element if the target AGW information returned by the mobile communication core network element is unavailable, wherein the second rejection response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is unavailable.

[0199] In some embodiments, the media plane interaction module 1103 is further configured to: receive a user plane information subscription request sent by a media plane session control function network element, wherein the user plane information subscription request is used to request a mobile communication core network element to notify the media plane session control function network element of user plane routing information; and send a user plane information notification message to the media plane session control function network element, wherein the user plane information notification message carries user plane routing information.

[0200] In some embodiments, the media plane interaction module 1103 is further configured to: receive a first confirmation response message returned by the media plane session control function network element, wherein the first confirmation response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is available.

[0201] In some embodiments, the media plane interaction module 1103 is further configured to: receive a first rejection response message returned by the media plane session control function network element, wherein the first rejection response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is unavailable.

[0202] In some embodiments of this disclosure, the media plane session control function network element may be the proxy call session control function P-CSCF network element within the IP Multimedia Subsystem (IMS) network; the mobile communication core network element may be the session management function (SMF) network element of the 5G core network.

[0203] In some embodiments, the SMF network element notifies the P-CSCF network element of user plane routing information in any of the following ways: ① The SMF network element directly sends user plane routing information to the P-CSCF network element; ② The SMF network element sends user plane routing information to the PCF network element, and then forwards it to the P-CSCF network element via the PCF network element; ③ The SMF network element sends user plane routing information to the NEF network element, and then forwards it to the PCF network element via the NEF network element, and then forwards it to the P-CSCF network element via the PCF network element.

[0204] In some embodiments, when the mobile communication core network element is an SMF network element of the 5G core network, the SMF network element can receive one or more AGW information forwarded by the PCF network element, wherein the AGW information forwarded by the PCF network element is the AGW information selected by the media plane session control function network element.

[0205] In some embodiments, the triggering conditions for an SMF network element to notify a P-CSCF network element of user plane routing information include at least one of the following: the SMF network element selects a UPF network element; the SMF network element reselects a UPF network element; the SMF network element adds a UPF network element.

[0206] In some embodiments, the UPF network element in this disclosure is deployed on a non-terrestrial carrier. In one embodiment, the non-terrestrial carrier for deploying the UPF network element may be a satellite in regenerative mode.

[0207] In some embodiments, the AGW in this disclosure is deployed on a non-terrestrial carrier, and the AGW information may include, but is not limited to, the identifier of the non-terrestrial carrier where the AGW is located. In one embodiment, the non-terrestrial carrier where the AGW is deployed may be a satellite in regeneration mode.

[0208] It should be noted that the examples and application scenarios implemented by the modules in the above-described session management function network element embodiments and the corresponding steps in the method embodiments are the same, but are not limited to the content disclosed in the above-described method embodiments. It should also be noted that the above modules, as part of a device, can be executed in a computer system such as a set of computer-executable instructions.

[0209] Based on the same inventive concept, this disclosure also provides a policy control function network element, as described in the following embodiments. Since the principle by which this network element embodiment solves the problem is similar to that of the above method embodiments, the implementation of this network element embodiment can refer to the implementation of the above method embodiments, and repeated details will not be elaborated further.

[0210] Figure 12 shows a schematic diagram of a policy control function network element in an embodiment of this disclosure. As shown in Figure 12, the policy control function network element may include: a third AGW information acquisition module 1201, used to acquire one or more AGW information sent by the media plane session control function network element. The media plane session control function network element is a network element in the multimedia service network used to select AGW.

[0211] In some embodiments, as shown in FIG12, the policy control function network element provided in this embodiment may further include: a first interaction module 1202, used to send one or more AGW information provided by the media plane session control function network element to the session management function network element.

[0212] In some embodiments, as shown in FIG12, the policy control function network element provided in this embodiment may further include: a second interaction module 1203, used to send user plane routing information provided by the session management function network element to the media plane session control function network element.

[0213] It should be noted that the examples and application scenarios implemented by the modules in the above-described policy control function network element embodiments and the corresponding steps in the method embodiments are the same, but are not limited to the content disclosed in the above-described method embodiments. It should also be noted that the above modules, as part of a device, can be executed in a computer system such as a set of computer-executable instructions.

[0214] Those skilled in the art will understand that various aspects of this disclosure can be implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, which can be collectively referred to herein as a "circuit", "module" or "system".

[0215] Based on the same inventive concept, this disclosure also provides an electronic device, which includes: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the user plane information interaction method described above by executing the executable instructions. Since the principle by which this electronic device embodiment solves the problem is similar to that of the above method embodiments, the implementation of this electronic device embodiment can refer to the implementation of the above method embodiments, and repeated details will not be described again.

[0216] The electronic device 1300 according to this embodiment of the present disclosure will now be described with reference to FIG13. The electronic device 1300 shown in FIG13 is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present disclosure.

[0217] As shown in Figure 13, the electronic device 1300 is presented in the form of a general-purpose computing device. The components of the electronic device 1300 may include, but are not limited to: at least one processing unit 1310, at least one storage unit 1320, and a bus 1330 connecting different system components (including storage unit 1320 and processing unit 1310).

[0218] The storage unit stores program code that can be executed by the processing unit 1310, causing the processing unit 1310 to perform the steps described in the "Exemplary Methods" section above according to various exemplary embodiments of this disclosure.

[0219] In some embodiments, when the electronic device 1300 is a media plane session control function network element, the processing unit 1310 may perform the following steps of the above method embodiment: obtain at least one access gateway AGW information; send one or more AGW information to the mobile communication core network element.

[0220] In some embodiments, when the electronic device 1300 is a mobile communication core network element, the processing unit 1310 may perform the following steps of the above method embodiment: obtaining one or more AGW information sent by the media plane session control function network element, wherein the media plane session control function network element is a network element in the multimedia service network used to select AGW.

[0221] Storage unit 1320 may include readable media in the form of volatile storage units, such as random access memory (RAM) 13201 and / or cache memory 13202, and may further include read-only memory (ROM) 13203.

[0222] Storage unit 1320 may also include a program / utility 13204 having a set (at least one) of program modules 13205, such program modules 13205 including but not limited to: operating system, one or more application programs, other program modules and program data, each or some combination of these examples may include an implementation of a network environment.

[0223] Bus 1330 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0224] Electronic device 1300 can also communicate with one or more external devices 1340 (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with electronic device 1300, and / or with any device that enables electronic device 1300 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 1350. Furthermore, electronic device 1300 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 1360. As shown, network adapter 1360 communicates with other modules of electronic device 1300 via bus 1330. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 1300, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0225] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, terminal device, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0226] Based on the same inventive concept, this disclosure also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the user plane information interaction method described above. Since the principle by which this computer-readable storage medium embodiment solves the problem is similar to that of the above method embodiments, the implementation of this computer-readable storage medium embodiment can refer to the implementation of the above method embodiments, and repeated details will not be elaborated further.

[0227] More specific examples of computer-readable storage media in this disclosure may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0228] In this disclosure, a computer-readable storage medium may include a data signal propagated in baseband or as part of a carrier wave, carrying readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of transmitting, propagating, or transmitting a program for use by or in connection with an instruction execution system, apparatus, or device.

[0229] Optionally, the program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0230] In practical implementation, program code for performing the operations of this disclosure can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0231] Based on the same inventive concept, this disclosure also provides a computer program product, including a computer program or instructions, which, when executed by a processor, implements any one of the user plane information interaction methods described in the above method embodiments. Since the principle by which this computer program product embodiment solves the problem is similar to that of the above method embodiments, the implementation of this computer program product embodiment can refer to the implementation of the above method embodiments, and repeated details will not be elaborated further.

[0232] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0233] Furthermore, although the steps of the method in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or a step may be broken down into multiple steps.

[0234] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, mobile terminal, or network device, etc.) to execute the methods according to the embodiments of this disclosure.

[0235] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A user plane information interaction method, applied to a media plane session control function network element, comprising: Obtain at least one access gateway (AGW) information; Send one or more AGW messages to the mobile communication core network element.

2. The user face information interaction method according to claim 1, wherein, The method further includes: Send a user plane information subscription request to the mobile communication core network element, wherein the user plane information subscription request is used to request the mobile communication core network element to notify the media plane session control function network element of user plane routing information; The system receives a user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, wherein the user plane information notification message carries user plane routing information.

3. The user plane information interaction method according to claim 2, wherein, After receiving the user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, the method further includes: The first confirmation response message is returned to the mobile communication core network element, wherein the first confirmation response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is available.

4. The user plane information interaction method according to claim 3, wherein, After receiving the user plane information notification message sent by the mobile communication core network element to the media plane session control function network element, the method further includes: The first rejection response message is returned to the mobile communication core network element, wherein the first rejection response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is unavailable.

5. The user face information interaction method according to claim 1, wherein, After sending one or more AGW messages to the mobile communication core network element, the method further includes: Receive the target AGW information returned by the mobile communication core network element; If the target AGW information returned by the mobile communication core network element is available, an address allocation request message is sent to the target AGW so that the target AGW allocates a network communication address to the terminal according to the address allocation request message.

6. The user plane information interaction method according to claim 5, wherein, The method further includes: Receive the network communication address assigned to the terminal by the target AGW; Generate a Session Initiation Protocol (SIP) message carrying the network communication address and send it to the terminal and other media plane functional network elements.

7. The user plane information interaction method according to claim 5, wherein, After receiving the target AGW information returned by the mobile communication core network element, the method further includes: If the target AGW information returned by the mobile communication core network element is available, a second confirmation response message is returned to the mobile communication core network element, wherein the second confirmation response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is available.

8. The user plane information interaction method according to claim 5, wherein, After receiving the target AGW information returned by the mobile communication core network element, the method further includes: If the target AGW information returned by the mobile communication core network element is unavailable, the target AGW information is deleted and / or a second rejection response message is returned to the mobile communication core network element, wherein the second rejection response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function element is unavailable.

9. The user plane information interaction method according to claim 5, wherein, The network communication address includes: IP address and / or port number.

10. The user plane information interaction method according to claim 7, wherein, The second confirmation response message carries the network communication address allocated to the terminal by the target AGW; the mobile communication core network element is also used to configure user plane routing information according to the network communication address allocated to the terminal by the target AGW, and return the activated user plane routing information to the media plane session control function network element.

11. The user plane information interaction method according to claim 10, wherein, The method further includes: Receive activated user plane routing information returned by the mobile communication core network element; Based on the activated user plane routing information, the media plane session establishment process is completed.

12. The user plane information interaction method according to any one of claims 1 to 11, wherein, The media plane session control function network element is the proxy call session control function P-CSCF network element within the IP Multimedia Subsystem (IMS) network.

13. The user plane information interaction method according to claim 12, wherein, The mobile communication core network element is a 5G core network element, which includes at least one of the following: Session Management Function (SMF) network element, Policy Control Function (PCF) network element, and Network Open Function (NEF) network element.

14. The user plane information interaction method according to claim 13, wherein, The SMF network element notifies the P-CSCF network element of user plane routing information including any one of the following: The SMF network element directly sends user plane routing information to the P-CSCF network element; The user plane routing information is sent from the SMF network element to the PCF network element and then forwarded by the PCF network element to the P-CSCF network element. The user plane routing information is sent from the SMF network element to the NEF network element, then forwarded by the NEF network element to the PCF network element, and then forwarded by the PCF network element to the P-CSCF network element.

15. The user plane information interaction method according to claim 13, wherein, Sending one or more AGW messages to a mobile communication core network element, including any one of the following: Send one or more AGW information to the PCF network element, so that the PCF network element sends one or more AGW information to the SMF network element; Send one or more AGW messages to the SMF network element.

16. The user plane information interaction method according to claim 13, wherein, The triggering condition for the SMF network element to notify the P-CSCF network element of user plane routing information includes at least one of the following: SMF network elements are selected from UPF network elements; SMF network element reselection UPF network element; Add UPF network elements to SMF network elements.

17. The user plane information interaction method according to claim 16, wherein, The UPF network element is deployed on a non-ground carrier.

18. The user plane information interaction method according to claim 17, wherein, The non-ground carrier is a satellite in regeneration mode.

19. The user plane information interaction method according to claim 1, wherein, The AGW is deployed on a non-ground carrier, and the AGW information includes: the identifier of the non-ground carrier where the AGW is located.

20. The user plane information interaction method according to claim 19, wherein, The non-ground carrier is a satellite in regeneration mode.

21. A user plane information interaction method, applied to a mobile communication core network element, comprising: The system acquires one or more AGW (Automatic Guided Vehicle) messages sent by a media plane session control function network element, which is a network element within the multimedia service network used to select an AGW.

22. The user plane information interaction method according to claim 21, wherein, The method further includes: The user plane information subscription request sent by the media plane session control function network element is received, wherein the user plane information subscription request is used to request the mobile communication core network element to notify the media plane session control function network element of user plane routing information; Send a user plane information notification message to the media plane session control function network element, wherein the user plane information notification message carries user plane routing information.

23. The user plane information interaction method according to claim 22, wherein, After sending a user plane information notification message to the media plane session control function network element, the method further includes: The system receives a first confirmation response message returned by the media plane session control function network element, wherein the first confirmation response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is available.

24. The user plane information interaction method according to claim 22, wherein, After sending a user plane information notification message to the media plane session control function network element, the method further includes: The system receives a first rejection response message returned by the media plane session control function network element, wherein the first rejection response message is used to indicate that the user plane routing information notified by the mobile communication core network element to the media plane session control function network element is unavailable.

25. The user plane information interaction method according to claim 21, wherein, After acquiring one or more AGW messages sent by the media plane session control function network element, the method further includes: The target AGW information is returned to the media plane session control function network element. The media plane session control function network element is used to: if the target AGW information returned by the mobile communication core network element is available, send an address allocation request message to the target AGW. The target AGW is used to allocate a network communication address to the terminal according to the address allocation request message, generate a Session Initiation Protocol (SIP) message carrying the network communication address, and send it to the terminal or other media plane function network elements.

26. The user plane information interaction method according to claim 25, wherein, The media plane session control function network element is further configured to: if the target AGW information returned by the mobile communication core network element is available, return a second confirmation response message to the mobile communication core network element, wherein the second confirmation response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is available.

27. The user plane information interaction method according to claim 25, wherein, The media plane session control function network element is further configured to: if the target AGW information returned by the mobile communication core network element is unavailable, delete the target AGW information and / or return a second rejection response message to the mobile communication core network element, wherein the second rejection response message is used to indicate that the target AGW information returned by the mobile communication core network element to the media plane session control function network element is unavailable.

28. The user plane information interaction method according to claim 25, wherein, The network communication address includes: IP address and / or port number.

29. The user plane information interaction method according to claim 26, wherein, The second confirmation response message carries the network communication address assigned to the terminal by the target AGW; the method further includes: The user plane routing information is configured according to the network communication address assigned to the terminal by the target AGW. The activated user plane routing information is returned to the media plane session control function network element so that the media plane session control function network element can complete the media plane session establishment process based on the activated user plane routing information.

30. The user plane information interaction method according to any one of claims 21 to 29, wherein, The media plane session control function network element is the proxy call session control function P-CSCF network element in the IP Multimedia Subsystem (IMS) network; the mobile communication core network element is the session management function (SMF) network element in the 5G core network.

31. The user plane information interaction method according to claim 30, wherein, The SMF network element notifies the P-CSCF network element of user plane routing information including any one of the following: The SMF network element directly sends user plane routing information to the P-CSCF network element; The user plane routing information is sent from the SMF network element to the PCF network element and then forwarded by the PCF network element to the P-CSCF network element. The user plane routing information is sent from the SMF network element to the NEF network element, then forwarded by the NEF network element to the PCF network element, and then forwarded by the PCF network element to the P-CSCF network element.

32. The user plane information interaction method according to claim 30, wherein, Acquire one or more AGW messages sent by the media plane session control function network element, including: Receive one or more AGW information forwarded by PCF network element, wherein the AGW information forwarded by PCF network element is the AGW information selected by media plane session control function network element.

33. The user plane information interaction method according to claim 30, wherein, The triggering condition for the SMF network element to notify the P-CSCF network element of user plane routing information includes at least one of the following: SMF network elements are selected from UPF network elements; SMF network element reselection UPF network element; Add UPF network elements to SMF network elements.

34. The user plane information interaction method according to claim 33, wherein, The UPF network element is deployed on a non-ground carrier.

35. The user plane information interaction method according to claim 34, wherein, The non-ground carrier is a satellite in regeneration mode.

36. The user plane information interaction method according to claim 34, wherein, The AGW is deployed on a non-ground carrier, and the AGW information includes: the identifier of the non-ground carrier where the AGW is located.

37. The user plane information interaction method according to claim 36, wherein, After acquiring one or more AGW messages sent by the media plane session control function network element, the method further includes: Determine the target AGW information, wherein the target AGW information is the AGW information selected by the mobile communication core network element from one or more received AGW information; Based on the pre-acquired mapping relationship between non-ground carrier identifiers and data network identifiers (DNAI), the data network identifier (DNAI) corresponding to the target AGW is found according to the non-ground carrier identifier of the target AGW corresponding to the target AGW information. Based on the DNAI corresponding to the target AGW, select the target UPF network element that meets the preset conditions.

38. The user plane information interaction method according to claim 37, wherein, The target UPF network element includes at least one of the following: A UPF network element deployed on a first non-terrestrial carrier, wherein the first non-terrestrial carrier is the non-terrestrial carrier currently accessed by the terminal; UPF network elements deployed on a second non-ground carrier, wherein the second non-ground carrier is the UPF network element on the non-ground carrier where the target AGW is located; A UPF network element deployed on a third non-ground carrier, wherein the third non-ground carrier is the non-ground carrier closest to the first non-ground carrier; The UPF network element is deployed on a fourth non-ground carrier, wherein the fourth non-ground carrier is the non-ground carrier closest to the third non-ground carrier.

39. The user plane information interaction method according to claim 36, wherein, The non-ground carrier is a satellite in regeneration mode.

40. A media plane session control function network element, comprising: The first AGW information acquisition module is configured to acquire AGW information of at least one access gateway. The AGW information sending module is configured to send one or more AGW information messages to the mobile communication core network element.

41. A session management function network element, comprising: The second AGW information acquisition module is configured to acquire one or more AGW information sent by the media plane session control function network element, wherein the media plane session control function network element is a network element in the multimedia service network used to select AGW.

42. A policy control function network element, comprising: The third AGW information acquisition module is configured to acquire one or more AGW information sent by the media plane session control function network element, wherein the media plane session control function network element is a network element in the multimedia service network used to select AGW.

43. An electronic device comprising: processor; as well as Memory for storing the executable instructions of the processor; The processor is configured to execute the user plane information interaction method of any one of claims 1 to 39 by executing the executable instructions.

44. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the user plane information interaction method according to any one of claims 1 to 39.

45. A computer program product comprising: A computer program or instruction that, when executed by a processor, implements the user plane information interaction method according to any one of claims 1 to 39.

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