CN115915490A

CN115915490A - Method, device, equipment and storage medium for establishing data transmission path

Info

Publication number: CN115915490A
Application number: CN202110988793.2A
Authority: CN
Inventors: 侯云静; 王胡成; 徐晖
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2023-04-04

Abstract

The embodiment of the application relates to the technical field of mobile communication, and discloses a method, a device, equipment and a storage medium for establishing a data transmission path. The method is applied to the SMF network element and comprises the following steps: receiving a first message, wherein the first message comprises related information of a second terminal, the related information of the second terminal is used for indicating to establish a data transmission path, and the first message is sent by a first terminal, an AMF network element or a first anchor point UPF network element corresponding to the first terminal; and establishing a data transmission path based on the related information of the second terminal. By adopting the embodiment of the application, the data transmission path can be effectively established to transmit the data between the terminals, and the applicability is high.

Description

Method, device, equipment and storage medium for establishing data transmission path

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to a method, an apparatus, a device, and a storage medium for establishing a data transmission path.

Background

In the local area network technology of the communication system, a User Plane Function (UPF) network element needs to store a large amount of information related to a data transmission path (e.g., N19 tunnel information) to support end-to-end data transmission between terminals. When the information processing capability of the UPF network element is weak, for example, the UPF network element is deployed on a satellite, the data transmission path cannot be continuously maintained, so that end-to-end data transmission cannot be maintained.

Therefore, under the condition that the information processing capability of the UPF network element is weak, how to effectively establish a data transmission path for transmitting end-to-end data becomes a problem to be solved urgently.

Disclosure of Invention

Embodiments of the present application provide a method, an apparatus, a device, and a storage medium for establishing a data transmission path, which may effectively establish the data transmission path to transmit data between terminals.

In a first aspect, an embodiment of the present application provides a method for establishing a data transmission path, where the method is applied to an SMF network element, and the method includes:

receiving a first message, wherein the first message comprises related information of a second terminal, the related information of the second terminal is used for indicating to establish a data transmission path, and the first message is sent by a first terminal, an access and mobility management function (AMF) network element or a first anchor point User Plane Function (UPF) network element corresponding to the first terminal;

and establishing a data transmission path based on the related information of the second terminal.

On the other hand, an embodiment of the present application provides a method for establishing a data transmission path, where the method is applied to a UPF network element, where the UPF network element is a first anchor point UPF network element corresponding to a first terminal, and the method includes:

receiving first data sent by a first terminal;

and sending a first message to the SMF network element based on the first data, wherein the first message comprises the relevant information of the second terminal, and the relevant information of the second terminal is used for indicating the establishment of a data transmission path.

In another aspect, an embodiment of the present application provides a method for establishing a data transmission path, where the method is applied to an AMF network element, and the method includes:

receiving a first request sent by a first terminal;

and sending a PDU session context updating request to an SMF network element based on the first request, wherein the first request and the PDU session context updating request comprise relevant information of a second terminal, and the relevant information of the second terminal is used for indicating the establishment of a data transmission path.

In another aspect, an embodiment of the present application provides a method for establishing a data transmission path, where the method is applied to a first terminal, and the method includes:

and determining to send first data to a second terminal, and sending a first message, wherein the first message comprises the relevant information of the second terminal, and the relevant information of the second terminal is used for indicating the establishment of a data transmission path.

In another aspect, an embodiment of the present application provides an apparatus for establishing a data transmission path, where the apparatus includes:

a first receiving unit, configured to receive a first message, where the first message includes relevant information of a second terminal, where the relevant information of the second terminal is used to indicate establishment of a data transmission path, and the first message is sent by a first terminal, an access and mobility management function (AMF) network element, or a first anchor point User Plane Function (UPF) network element corresponding to the first terminal;

and the first processing unit is used for establishing a data transmission path based on the related information of the second terminal.

On the other hand, an embodiment of the present application provides an apparatus for establishing a data transmission path, where the apparatus includes:

a second receiving unit, configured to receive first data sent by a first terminal;

a second sending unit, configured to send a first message to an SMF network element based on the first data, where the first message includes relevant information of a second terminal, and the relevant information of the second terminal is used to indicate that a data transmission path is established.

a third receiving unit, configured to receive a first request sent by a first terminal;

a third sending unit, configured to send a PDU session context update request to an SMF network element based on the first request, where the first request and the PDU session context update request include related information of a second terminal, and the related information of the second terminal is used to indicate that a data transmission path is established.

a fourth sending unit, configured to determine to send first data to a second terminal, and send a first message, where the first message includes relevant information of the second terminal, and the relevant information of the second terminal is used to indicate establishment of a data transmission path.

In another aspect, an embodiment of the present application provides an SMF network element, including a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

In another aspect, an embodiment of the present application provides a UPF network element, including a memory, a transceiver, a processor:

receiving first data sent by a first terminal;

and sending a first message to an SMF network element based on the first data, wherein the first message comprises relevant information of a second terminal, and the relevant information of the second terminal is used for indicating the establishment of a data transmission path.

In another aspect, an embodiment of the present application provides an AMF network element, including a memory, a transceiver, and a processor:

receiving a first request sent by a first terminal;

In another aspect, an embodiment of the present application provides a terminal, including a memory, a transceiver, and a processor:

On the other hand, an embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements any one of the methods for establishing a data transmission path provided in the embodiment of the present application.

Based on the method for establishing the data transmission path provided by the application embodiment, the data transmission path can be effectively established in various ways to transmit data between the terminals under the condition that the UPF network element cannot continuously maintain the data transmission path, and the applicability is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic flowchart of a method for establishing a data transmission path according to an embodiment of the present application;

fig. 2 is another schematic flow chart of a method for establishing a data transmission path according to an embodiment of the present application;

fig. 3 is a schematic flowchart of a method for establishing a data transmission path according to an embodiment of the present application;

fig. 4 is a schematic flowchart of a method for establishing a data transmission path according to an embodiment of the present application;

fig. 5a is a schematic view of a scenario for establishing a data transmission path according to an embodiment of the present application;

fig. 5b is a schematic diagram of another scenario for establishing a data transmission path according to an embodiment of the present application;

fig. 5c is a schematic diagram of another scenario for establishing a data transmission path according to an embodiment of the present application;

fig. 5d is a schematic diagram of another scenario for establishing a data transmission path according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an apparatus for establishing a data transmission path according to an embodiment of the present application;

fig. 7 is another schematic structural diagram of an apparatus for establishing a data transmission path according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an apparatus for establishing a data transmission path according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an apparatus for establishing a data transmission path according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

Detailed Description

In the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In addition, the technical scheme provided by the embodiment of the application can be applied to various systems, especially 5G systems. For example, suitable systems may be global system for mobile communications (GSM) systems, code Division Multiple Access (CDMA) systems, wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) systems, long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, long term evolution (long term evolution) systems, LTE-a systems, universal mobile systems (universal mobile telecommunications systems, UMTS), universal internet Access (world interoperability for microwave Access (WiMAX) systems, new Radio interface (NR) systems, etc. These various systems include terminals and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

The terminal referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. In different systems, the names of terminals may be different, for example, in a 5G system, a terminal may be called a User Equipment (UE). A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), and the like. A wireless terminal may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment.

The network element related to the embodiment of the present application may be a network device applied to various communication systems. The network device may be a base station, which may include a plurality of cells serving the terminal. A base station may also be called an access point, or may be a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals, or by other names, depending on the particular application. The network device may be configured to exchange received air frames with Internet Protocol (IP) packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) communications network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB) or an e-NodeB) in a Long Term Evolution (LTE) System, a 5G Base Station (gNB) in a 5G network architecture (next generation System), a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico), and the like, which are not limited in the embodiments of the present application. In some network architectures, a network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

The network device and the network element may each use one or more antennas to perform Multiple Input Multiple Output (MIMO) transmission, where the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). According to the form and the number of the root antenna combination, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, and can also be diversity transmission, precoding transmission, beamforming transmission, etc.

Referring to fig. 1, fig. 1 is a schematic flowchart of a method for establishing a data transmission path according to an embodiment of the present disclosure. The method for establishing a data transmission path provided in the embodiment of the present application may be applicable to a Session Management Function (SMF) network element, and specifically may include the following steps:

step S11, receiving a first message, wherein the first message comprises the relevant information of the second terminal, and the relevant information of the second terminal is used for indicating the establishment of the data transmission path.

In some possible embodiments, the data transmission path is used for transmitting end-to-end data between the first terminal and the second terminal.

The first message is sent by a first terminal, an Access and Mobility Management Function (AMF) network element, or a first anchor point UPF network element corresponding to the first terminal.

In some possible implementations, a first message is received, including one or more of:

receiving a PDU session modification request sent by a first terminal;

receiving a PDU session context updating request sent by an AMF network element;

receiving an event notification sent by a first anchor point UPF network element corresponding to a first terminal, wherein the event notification is used for indicating that a data transmission path used for sending first data is not inquired, and the first data is data expected to be sent to a second terminal by the first terminal;

and receiving first indication information sent by a first anchor point UPF network element corresponding to the first terminal, wherein the first indication information is used for indicating the establishment of a data transmission path.

Specifically, the PDU session modification request is sent to the SMF network element when the first terminal determines to send data to the second terminal.

Specifically, the PDU session context update request is sent to the SMF network element by the AMF network element after receiving the first request sent by the first terminal.

Specifically, the event notification is sent to the SMF network element when the first anchor point UPF network element corresponding to the first terminal does not find a data transmission path for transmitting the first data after receiving the first data sent by the first terminal based on the static IP address.

The event notification is used for indicating that a data transmission path for transmitting the first data is not queried.

Specifically, the first indication information is sent by the UPF network element corresponding to the first terminal after receiving first data sent by the first terminal through the corresponding RAN node based on the dynamic IP address, where the first indication information is used to indicate that a data transmission path is established.

In some possible embodiments, the first message includes Session Management (SM) information corresponding to the first terminal, where the SM information carries related information of the second terminal.

As an example, the SMF network element receives a PDU session context update request sent by the AMF network element, where the PDU session context update request includes SM information corresponding to the first terminal. Wherein, the SM information carries the related information of the second terminal.

In some possible embodiments, the event notification includes first data that the first terminal desires to send to the second terminal.

As an example, an SMF network element receives an event notification sent by a first anchor UPF network element corresponding to a first terminal, where the event notification includes first data sent by the first terminal to a second terminal.

And S12, establishing a data transmission path based on the related information of the second terminal.

In some possible embodiments, the SMF network element may determine the relevant information of the first terminal, determine a first anchor point UPF network element corresponding to the first terminal based on the relevant information of the first terminal, determine a second anchor point UPF network element corresponding to the second terminal based on the relevant information of the second terminal, and then establish a data transmission path between the first anchor point UPF network element and the second anchor point UPF network element.

Wherein, the first message received by the SMF network element includes the related information of the first terminal.

Optionally, the related information of the first terminal is one or more of:

a first Protocol Data Unit (PDU) session identifier corresponding to a first terminal and used for transmitting a PDU session of Data;

location information of the first terminal;

a node identifier of a Radio Access Network (RAN) node corresponding to the first terminal.

The location information of the first terminal includes related information of a cell in which the first terminal is located, such as a cell identifier of the cell in which the first terminal is located.

As an example, an SMF network element receives a PDU session modification request sent by a first terminal, where the PDU session modification request carries a first PDU session identifier of a PDU session used for data transmission and corresponding to the first terminal.

As an example, the SMF network element receives first indication information sent by a first anchor UPF network element corresponding to the first terminal, where the first indication information includes a node identifier of a RAN node corresponding to the first terminal.

In some possible embodiments, the SMF network element may determine the first anchor UPF network element based on one or more of a first PDU session identifier of a PDU session for transmitting data corresponding to the first terminal, location information of the first terminal, or a node identifier of a RAN node corresponding to the first terminal.

As an example, the SMF network element may determine, based on a first PDU session identifier of a PDU session used for transmitting data corresponding to the first terminal, a first anchor point UPF network element corresponding to the first terminal.

As an example, the SMF network element may determine, based on the location information of the first terminal, a first anchor point UPF network element corresponding to the first terminal.

As an example, the SMF network element may determine, based on the node identifier of the RAN node corresponding to the first terminal, a first anchor UPF network element corresponding to the first terminal.

In some possible embodiments, the related information of the second terminal includes one or more of:

an identity of the second terminal;

an Internet Protocol (IP) address of the second terminal;

a General Public Subscription Identifier (GPSI) of the second terminal;

a Media Access Control (MAC) address of the second terminal;

and the second PDU session identification of the PDU session used for transmitting data corresponding to the second terminal.

The identifier of the second terminal includes an equipment identifier of the second terminal, or includes an application layer identifier corresponding to the second terminal, such as a mobile phone number corresponding to the second terminal, which may be specifically determined based on the actual application scenario requirement, and is not limited herein.

Further, the SMF may determine a second anchor UPF network element corresponding to the second terminal based on one or more of an identifier of the second terminal, an IP address of the second terminal, a GPSI of the second terminal, a MAC address of the second terminal, or a second PDU session identifier of a PDU session for transmitting data corresponding to the second terminal.

As an example, the SMF network element may determine, based on the identifier of the second terminal, a second anchor point UPF network element corresponding to the second terminal;

as an example, the SMF network element may determine, based on the IP address of the second terminal, a second anchor point UPF network element corresponding to the second terminal;

as an example, the SMF network element may determine, based on the GPSI of the second terminal, a second anchor UPF network element corresponding to the second terminal;

as an example, the SMF network element may determine, based on the MAC address of the second terminal, a second anchor point UPF network element corresponding to the second terminal;

as an example, the SMF network element may determine, based on a second PDU session identifier of a PDU session for transmitting data corresponding to the second terminal, a second anchor UPF network element corresponding to the second terminal.

The SMF network element may specifically determine, based on the relevant information of the second terminal, a terminal context corresponding to the second terminal, and determine, based on the terminal context corresponding to the second terminal, a PDU session established by the second terminal and used for transmitting data, so as to determine a second anchor point UPF network element corresponding to the PDU session.

In some possible embodiments, after determining a first anchor UPF network element corresponding to the first terminal and a second anchor UPF network element corresponding to the second terminal, the SMF network element may establish a tunnel or a communication connection between the first anchor UPF network element and the second anchor UPF network element, and use the established tunnel or communication connection as a data transmission path for transmitting data.

Specifically, the SMF network element may send second indication information to the network controller to instruct the network controller to establish a data transmission path between the first anchor UPF network element and the second anchor UPF network element.

In some possible embodiments, after establishing the data transmission path, the method further includes:

and sending a response message, wherein the response message is used for indicating that the data transmission path is established.

As an example, if the first message is a PDU session modification request sent by the first terminal, the SMF network element sends a PDU session modification reply message to the first terminal after establishing the data transmission path.

As an example, if the first message is a PDU session context update request sent by the AMF network element, the SMF network element sends a PDU session context update response message to the AMF network element after establishing the data transmission path.

As an example, if the first message is an event notification sent by a first anchor UPF network element corresponding to the first terminal, the SMF network element sends an event notification confirmation message to the first anchor UPF network element after establishing the data transmission path.

In some possible embodiments, after establishing the data transmission path, the first terminal may send data to the second terminal based on the data transmission path.

Further, the method further comprises:

receiving a second message sent by the first terminal, wherein the second message is used for indicating that the data transmission between the first terminal and the second terminal is finished;

the data transmission path is released.

Specifically, the second message may be a PDU session modification request sent by the first terminal after the data transmission is finished.

Optionally, the second message may also be a related message that is sent by another network element corresponding to the first terminal, such as a RAN node, a first anchor UPF network element, or an AMF network element, and is used to indicate that data transmission between the first terminal and the second terminal is finished, and may be specifically determined based on requirements of an actual application scenario, which is not limited herein.

Optionally, the second message may include at least one of the related information of the first terminal or the related information of the second terminal, and the SMF network element may determine a data transmission path for transmitting data between the first terminal and the second terminal based on one or more of the related information of the first terminal or the related information of the second terminal, and further release the data transmission path.

As an example, the second message is a PDU session modification request sent by the first terminal, and the SMF network element may determine the first anchor point UPF network element based on the related information of the first terminal, determine the second anchor point UPF network element based on the related information of the second terminal, and further release the data transmission path between the first anchor point UPF network element and the second anchor point UPF network element.

Optionally, after releasing the data transmission path, the SMF network element may send a PDU session modification reply message to the first terminal, so as to indicate that the data transmission path is released completely.

Referring to fig. 2, fig. 2 is another schematic flow chart of a method for establishing a data transmission path according to an embodiment of the present application. The method for establishing data transmission provided by the embodiment of the application can be applied to a first anchor point UPF network element, and specifically can comprise the following steps:

and step S21, receiving first data sent by the first terminal.

Specifically, the first data may be sent by the first terminal to the first anchor UPF network element based on the static IP address.

Optionally, the first data may be sent by the first terminal to the first anchor UPF network element through the corresponding RAN node based on the dynamic IP address.

Step S22, based on the first data, sending a first message to the SMF network element, where the first message includes related information of the second terminal, and the related information of the second terminal is used to indicate that a data transmission path is established.

In some possible embodiments, if the first data is sent by the first terminal based on the static IP address, the first anchor point UPF network element searches for a data transmission path for transmitting the first data. And if the first anchor point UPF network element does not find the data transmission path for transmitting the first data, sending an event notification to the SMF network element.

Optionally, the event notification includes the first data.

Optionally, the event notification includes related information of the first terminal and related information of the second terminal.

In some possible embodiments, the first indication information is sent to the SMF network element if the first data is sent by the first terminal through the corresponding RAN node based on the dynamic IP address.

The first indication information is used for indicating the establishment of a data transmission path.

The RAN node corresponding to the first terminal receives first data sent by the first terminal based on a dynamic IP address through a wireless bearer, and sends first indication information to a first anchor point UPF based on a General Packet Radio Service (GTP) data Packet.

When the RAN node corresponding to the first terminal sends the first data to the first anchor UPF network element, the RAN node also sends the related information of the second terminal to the first anchor UPF.

When the RAN node corresponding to the first terminal sends the first data to the first anchor point UPF network element, the RAN node may also send the relevant information of the first terminal to the first anchor point UPF network element.

In some possible embodiments, the first anchor UPF network element may receive the event notification acknowledgement message sent by the SMF network element, and send a relevant message indicating that the data transmission path is successfully established to the first terminal.

Referring to fig. 3, fig. 3 is a schematic flowchart of another method for establishing a data transmission path according to an embodiment of the present application. The method for establishing data transmission provided by the embodiment of the application can be applied to AMF network elements, and specifically comprises the following steps:

and step S31, receiving a first request sent by the first terminal.

In some possible embodiments, the first request includes information related to the first terminal and information related to the second terminal.

In some possible embodiments, the first request is a service request or a registration request sent by the first terminal in an idle state.

Optionally, the first request includes SM information corresponding to the first terminal, and the SM information carries relevant information of the second terminal.

As an example, the AMF network element may receive a registration request or a service request carrying SM information sent by a first terminal, where the registration request or the service request carries related information of a second terminal.

Step S32, based on the first request, sending a PDU session context update request to the SMF network element, wherein the first request and the PDU session context update request comprise the relevant information of the second terminal, and the relevant information of the second terminal is used for indicating the establishment of the data transmission path.

In some possible embodiments, after receiving the first request, the AMF network element may determine a corresponding SMF network element based on the first request, and send a PDU session context update request to the SMF network element.

Optionally, the PDU session context update request includes related information of the first terminal.

Optionally, the PDU session context update request includes related information of the second terminal.

The PDU session context update request comprises SM information corresponding to the first terminal, and the SM information carries relevant information of the second terminal.

After receiving the first request, the AMF network element may determine a corresponding SMF network element based on the first request, and send a PDU session context update request to the SMF network element.

As an example, the AMF network element may determine, according to a first PDU session identifier of a PDU session used for transmitting data and a PDU session context corresponding to the first terminal, an SMF network element serving the PDU session, and send a PDU session context update request to the SMF network element.

In some possible embodiments, the method further comprises:

and receiving a PDU session context update response message sent by the SMF network element to determine that the SMF network element successfully establishes the data transmission path.

Further, the AMF network element may send third indication information to the first terminal, where the third indication information is used to indicate that the data transmission path is successfully established.

In some possible embodiments, the method further comprises:

and sending a second request to a RAN node corresponding to the first terminal, so that the RAN node sends Radio Resource Control (RRC) connection configuration information to the first terminal.

The second request may be an N2 PDU session request.

The RRC connection configuration information is used to indicate that the first terminal enters a connected state from an idle state, and the first terminal may send data to the second terminal in the connected state.

Referring to fig. 4, fig. 4 is a schematic flowchart of another method for establishing a data transmission path according to an embodiment of the present application. The method for establishing data transmission provided by the embodiment of the application can be applied to a first terminal, and specifically comprises the following steps:

step S41, determining to send the first data to the second terminal, and sending a first message, where the first message includes related information of the second terminal, and the related information of the second terminal is used to indicate establishment of a data transmission path.

Wherein, the first message further comprises the relevant information of the first terminal.

In some possible embodiments, the determining, by the first terminal, to send the first data to the second terminal includes one or more of:

determining a destination IP address of first data generated by the upper layer application as an IP address of the second terminal;

receiving an identifier of a second terminal provided by an upper application;

and determining the destination MAC address of the MAC frame generated by the upper layer application as the MAC address of the second terminal.

As an example, if the first terminal determines that the destination IP address of the first data generated by the upper layer application is the IP address of the second terminal, it determines to send the first data to the second terminal.

As an example, if the first terminal receives the identifier of the second terminal provided by the upper layer application, the first terminal determines to send the first data to the second terminal.

As an example, if the first terminal determines that the destination MAC address of the MAC frame generated by the upper layer application is the MAC address of the second terminal, it determines to transmit the first data to the second terminal.

In some possible embodiments, the first terminal sends the first message, including:

and sending a PDU session modification request to the SMF network element, wherein the PDU session modification request comprises the relevant information of the second terminal, and the relevant information of the second terminal is used for indicating the establishment of a data transmission path for transmitting the first data.

Wherein, the PDU session modification request may further include related information of the first terminal.

a first request is sent to the AMF network element, the first request including information related to the second terminal.

Wherein, the first request is used for instructing the AMF network element to send a PDU session context update request to the SMF network element.

Optionally, the first request includes SM information corresponding to the first terminal, where the SM information carries related information of the second terminal.

Wherein the first request may further include information related to the first terminal.

Optionally, the first request is a service request or a registration request.

As an example, the first terminal determines to send the first data to the second terminal in an idle state, and the first terminal sends a service request or a registration request to the AMF network element.

In some possible embodiments, the first terminal may send the first data to the corresponding first anchor UPF network element based on the static IP address.

Wherein, the static IP address is allocated by an Application Function (AF) network element.

Optionally, the first terminal may send the first data to the corresponding RAN node based on the dynamic IP address, so that the RAN node sends the first data to the first anchor UPF network element.

In some possible embodiments, if the first terminal sends a PDU session modification request to the SMF network element, the method further includes:

and receiving a PDU session modification reply message sent by the SMF network element to determine that the data transmission path is successfully established.

In some possible embodiments, if the first terminal sends the first request to the AMF network element, the method further includes:

and receiving third indication information which is sent by the AMF network element and used for indicating that the data transmission path is successfully established.

Optionally, the method further includes:

and if the data transmission between the first terminal and the second terminal is finished, sending a second message to the SMF network element, wherein the second message is used for indicating that the data transmission between the first terminal and the second terminal is finished.

Further, the method further comprises:

and receiving a PDU session modification reply message sent by the SMF network element so as to determine that the data transmission path is released completely based on the PDU session modification reply message.

The method for establishing a data transmission path provided in the embodiments of the present application is further described below with reference to specific examples.

Example one:

referring to fig. 5a, fig. 5a is a schematic view of a scenario for establishing a data transmission path according to an embodiment of the present disclosure. Wherein, UE1 and UE2 execute PDU conversation establishing process in advance, and establish PDU conversation for transmitting data.

The method includes that UE1 determines that a target IP address of first data generated by upper-layer application is an IP address of UE2, or UE1 receives an identifier of UE2 provided by the upper-layer application, or UE1 determines that a target MAC address of a MAC frame generated by the upper-layer application is an MAC address of UE2, and then UE1 determines to send the first data to UE2 and determines to establish a data transmission path for transmitting the first data.

Further, UE1 sends a PDU session modification request to the SMF network element, where the PDU session modification request includes related information of UE2, such as an identity of UE2, an IP address of UE2, a GPSI of UE2, and a MAC address of UE 2.

The PDU session modification request includes related information of UE1, such as a first PDU session identifier of a PDU session corresponding to UE1 and used for transmitting data.

Further, the SMF network element receives a PDU session modification request sent by the UE1, determines a PDU session for data transmission established by the UE1 according to the relevant information of the UE1, and determines an anchor point UPF network element of the PDU session: UPF1 network elements. The SMF network element determines a PDU session established by the UE2 and used for transmitting data according to the related information of the UE2, and determines an anchor UPF2 network element of the PDU session: UPF2 network elements.

Further, the SMF network element establishes a tunnel or a connection between the UPF1 network element and the UPF2 network element, and obtains a data transmission path for transmitting the first data.

Further, the SMF network element returns a PDU session modification reply message to UE1, indicating to UE1 that the data transmission path has been established successfully.

Based on this, UE1 and UE2 can transmit data based on the above-described data transmission path.

Example two:

referring to fig. 5b, fig. 5b is a schematic view of another scenario for establishing a data transmission path according to the embodiment of the present application. Wherein, UE1 and UE2 execute PDU conversation establishing process in advance, and establish PDU conversation for transmitting data.

When the UE1 is in an idle state, if it is determined that a target IP address of first data generated by an upper layer application is an IP address of the UE2, or the UE1 receives an identifier of the UE2 provided by the upper layer application, or the UE1 determines that a target MAC address of a MAC frame generated by the upper layer application is an MAC address of the UE2, or receives the first data sent to the UE2, the UE1 determines to send the first data to the UE2, and determines to establish a data transmission path for transmitting the first data.

Wherein, the UE1 may determine that the first data is sent to the UE2 according to the destination IP address of the first data and the related configuration information.

Further, the UE1 sends a Service Request (Service Request) or a Registration Request (Registration) to the AMF network element, and carries the relevant information of the UE1 and the relevant information of the UE 2. Such as the first PDU session id carrying the PDU session established by UE1 for transmitting data and the SM information, the SM information includes related information of UE2, for example, the id or IP address of UE 2.

Further, the AMF element determines, according to the locally stored PDU session context and the first PDU session identifier for transmitting data established by the UE1, the SMF element serving the PDU session, and sends a PDU session context update Request (Nsmf _ PDU _ update smcontext Request) to the SMF element, where the PDU session context update Request includes SM information carrying related information of the UE 2.

Further, the SMF network element determines, according to the relevant information of the UE1, an anchor UPF network element corresponding to the UE1, such as according to the location information of the UE1 or the node identifier of the corresponding RAN node: UPF1 network elements.

The SMF network element may send an N4 session establishment request to the UPF1, so as to establish association between the SMF network element and the UPF1 network element on the control plane. The UPF1 network element may determine the SMF network element side node on the N4 interface based on the N4 session establishment request. The UPF1 network element returns an N4 session establishment response message to the SMF network element, and the SMF network element may determine the UPF1 side node on the N4 interface based on the N4 session establishment response message, thereby establishing the association of the SMF network element and the UPF1 network element on the control plane.

The SMF network element determines an anchor point UPF network element corresponding to the UE2 according to the relevant information of the UE 2: UPF2 network elements. Specifically, the context of the UE2 may be determined according to the related information of the UE2, and the PDU session for transmitting data established by the UE2 is determined based on the context of the UE2, and the anchor UPF network element of the PDU session is determined: UPF2.

Further, the SMF network element establishes a tunnel or a connection between the UPF1 and the UPF2 to obtain a data transmission path, and sends a PDU session update Response message (Nsmf _ pdusesion _ update smcontext Response) to the AMF network element to indicate that the data transmission path is successfully established.

Further, the AMF network element may send a request message (e.g., an N2 PDU session request) to the RAN node corresponding to UE1, and the RAN node sends RRC connection configuration information to UE1. Thus, the UE1 can enter the connected state based on the RRC connection configuration information, and after entering the connected state, the UE1 can determine that the data transmission path is successfully established, and can send data to the UE2 in the connected state.

On the other hand, the RAN node may send an acknowledgement message (e.g., N2 PDU session request acknowledgement message) for the request message to the AMF network element, the AMF network element sends a PDU session context update request to the SMF network element again, the SMF network element sends an N4 session modification request to the UPF1 network element after receiving the PDU session context update request, and after receiving an N4 session modification response message of the AMF network element, may send data sent by the UE2 to the UE1 through the service data transmission path.

Example three:

referring to fig. 5c, fig. 5c is a schematic diagram of another scenario for establishing a data transmission path according to the embodiment of the present application. UE1 and UE2 execute a PDU session establishment procedure in advance, respectively, to establish a PDU session for transmitting data.

On one hand, the UE1 sends first data to a corresponding anchor point UPF network element (UPF 1 network element) based on a static IP address, and after the UPF1 network element receives the first data, a data transmission path for transmitting the first data is inquired.

The UE1 acquires the static IP address through the SMF network element, the SMF network element interacts with the AF network element, requests the AF network element to distribute the static IP address, and stores the static IP address in the context of the PDU session established by the UE1.

Further, if the UPF1 network element does not find the data transmission path used for transmitting the first data, an event notification is sent to the SMF network element to indicate that the data transmission path used for transmitting the first data is found.

The event notification also carries the first data, the related information of the UE2, and the related information of the UE1 (for example, an identifier of a PDU session used by the UE1 to transmit the first data, or an identifier of a PDU session established by the SMF network element for the UE1 to transmit data).

The SMF network element subscribes an event notice that the data cannot be successfully transmitted to the UPF1 network element in advance.

Further, after receiving the event notification, the SMF network element determines, according to the relevant information of the UE1, an anchor network element corresponding to the UE 1: UPF1 network element, and determining anchor point network element corresponding to UE2 according to UE2 related information: UPF2, and establishing a data transmission path between the UPF1 network element and the UPF2 network element.

Further, the SMF network element may send an event notification acknowledgement message to the UPF1 network element to indicate that the data transmission path establishment is successful. Or the UPF1 network element may determine that the data transmission path is successfully established when receiving the routing configuration information sent by the network controller or the configuration information for establishing the data transmission path.

Based on this, data can be transmitted between UE1 and UE2 through the data transmission path.

On the other hand, when the UE1 sends the first data to the UE2 by using the dynamic IP address, the first data is sent to the RAN node through the radio bearer first, where the radio bearer layer carries the related information of the UE 2.

When the RAN node receives the first data from the radio bearer layer, the related information of the UE2 is carried in the header of the N3 tunnel, and when the UPF1 network element receives the first data, the UPF1 network element sends first indication information to the SMF network element to indicate the SMF network element to establish a data transmission path.

Wherein the first indication information comprises the related information of the UE1 and the related information of the UE 2.

The SMF network element may determine the anchor point network element corresponding to the UE1 according to the related information of the UE 1: UPF1 network element, and determining anchor point network element corresponding to UE2 according to UE2 related information: UPF2, and establishing a data transmission path between the UPF1 network element and the UPF2 network element.

Example four:

referring to fig. 5d, fig. 5d is a schematic diagram of another scenario for establishing a data transmission path according to the embodiment of the present application. And if the UE1 determines that the data transmission with the UE2 is finished, sending a second message to the SMF network element, for example, sending a PDU session modification request to the SMF network element.

And the SMF network element determines a data transmission path for transmitting the number between the UE1 and the UE2 according to the context of the PDU session and releases the data transmission path.

Further, the SMF element may send a PDU session modification recovery message to UE1 to indicate that the data transmission path is released completely.

An embodiment of the present application further provides a device for establishing a data transmission path, as shown in fig. 6, fig. 6 is a schematic structural diagram of the device for establishing a data transmission path provided in the embodiment of the present application, and the device includes:

a first receiving unit 61, configured to receive a first message, where the first message includes relevant information of a second terminal, where the relevant information of the second terminal is used to indicate establishment of a data transmission path, and the first message is sent by a first terminal, an access and mobility management function AMF network element, or a first anchor user plane function UPF network element corresponding to the first terminal;

a first processing unit 62, configured to establish a data transmission path based on the relevant information of the second terminal. .

Optionally, the first processing unit 62 is configured to:

determining the relevant information of the first terminal, and determining a first anchor point UPF network element corresponding to the first terminal based on the relevant information of the first terminal;

determining a second anchor point UPF network element corresponding to the second terminal based on the relevant information of the second terminal;

and establishing a data transmission path between the first anchor point UPF network element and the second anchor point UPF network element.

Optionally, the first processing unit 62 is configured to:

determining a first anchor point UPF network element corresponding to the first terminal based on a first PDU session identifier of a Protocol Data Unit (PDU) session for transmitting data corresponding to the first terminal;

determining a first anchor point UPF network element corresponding to the first terminal based on the position information of the first terminal;

and determining a first anchor point UPF network element corresponding to the first terminal based on the node identifier of the radio access network RAN node corresponding to the first terminal.

Optionally, the first processing unit 62 is configured to:

determining a second anchor point UPF network element corresponding to the second terminal based on the identifier of the second terminal;

determining a second anchor point UPF network element corresponding to the second terminal based on the Internet protocol IP address of the second terminal;

determining a second anchor point UPF network element corresponding to the second terminal based on the general public subscription identity GPSI of the second terminal;

determining a second anchor point UPF network element corresponding to the second terminal based on the media access control MAC address of the second terminal;

and determining a second anchor point UPF network element corresponding to the second terminal based on a second PDU session identifier of the PDU session for transmitting data corresponding to the second terminal.

Optionally, the first processing unit 62 is configured to:

receiving a PDU session modification request sent by a first terminal;

receiving an event notification sent by a first anchor point UPF network element corresponding to a first terminal, wherein the event notification is used for indicating that a data transmission path used for sending first data is not inquired, and the first data is data which the first terminal expects to send to a second terminal;

receiving first indication information sent by a first anchor point UPF network element corresponding to a first terminal, wherein the first indication information is used for indicating the establishment of a data transmission path.

Optionally, the first processing unit 62 is further configured to:

receiving a second message sent by the first terminal, wherein the second message is used for indicating that data transmission between the first terminal and the second terminal is finished;

and releasing the data transmission path.

An embodiment of the present application further provides a device for establishing a data transmission path, as shown in fig. 7, fig. 7 is another schematic structural diagram of the device for establishing a data transmission path provided in the embodiment of the present application, where the device includes:

a second receiving unit 71, configured to receive first data sent by a first terminal;

a second sending unit 72, configured to send a first message to an SMF network element based on the first data, where the first message includes relevant information of a second terminal, and the relevant information of the second terminal is used to indicate that a data transmission path is established.

Optionally, the second sending unit 72 is configured to:

if the first data is sent by the first terminal based on a static IP address and a data transmission path used for transmitting the first data is not found, sending an event notification to an SMF network element;

and if the first data is sent by the first terminal through the corresponding RAN node based on the dynamic IP address, sending first indication information to the SMF network element.

An embodiment of the present application further provides a device for establishing a data transmission path, as shown in fig. 8, fig. 8 is a schematic structural diagram of the device for establishing a data transmission path provided in the embodiment of the present application, where the device includes:

a third receiving unit 81, configured to receive the first request sent by the first terminal;

a third sending unit 82, configured to send a PDU session context update request to the SMF network element based on the first request, where the first request and the PDU session context update request include related information of a second terminal, and the related information of the second terminal is used to indicate that a data transmission path is established.

Optionally, the first request is a service request or a registration request.

An embodiment of the present application further provides a device for establishing a data transmission path, as shown in fig. 9, fig. 9 is a schematic structural diagram of the device for establishing a data transmission path provided in the embodiment of the present application, where the device includes:

a fourth sending unit 91, configured to determine to send first data to a second terminal, and send a first message, where the first message includes related information of the second terminal, and the related information of the second terminal is used to indicate that a data transmission path is established.

Optionally, the fourth sending unit 91 is configured to:

sending a PDU session modification request to an SMF network element;

and sending a first request to the AMF network element, wherein the first request is used for indicating the AMF network element to send a PDU session context update request to the SMF network element.

Optionally, the fourth sending unit 91 is configured to:

determining a target IP address of first data generated by the upper layer application as an IP address of the second terminal;

receiving an identifier of a second terminal provided by an upper application;

It should be noted that, in the embodiment of the present application, the division of the module (unit) is schematic, and is only one logic function division, and another division manner may be available in actual implementation. In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a processor-readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that the apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

As shown in fig. 10, embodiments of the present application also provide an electronic device comprising a memory 1020, a transceiver 1040, a processor 1010;

a memory 1020 for storing a computer program;

a transceiver 1040 for receiving and transmitting data under the control of the processor 1010;

the electronic equipment can be used as an SMF network element, an AMF network element, a UPF network element or a terminal;

in some possible embodiments, when the electronic device is used as an SMF network element, the processor 1010 is configured to read the computer program in the memory 1020 and perform the following operations:

Optionally, the processor 1010 is configured to perform:

determining a second anchor point UPF network element corresponding to the second terminal based on the related information of the second terminal;

Optionally, the processor 1010 is configured to perform:

receiving a PDU session modification request sent by a first terminal;

Optionally, the processor 1010 is further configured to:

and releasing the data transmission path.

In some possible embodiments, when the electronic device is used as a UPF network element, the processor 1010 is configured to read the computer program in the memory 1020 and perform the following operations:

receiving first data sent by a first terminal;

Optionally, the processor 1010 is configured to perform:

if the first data is sent by the first terminal based on a static IP address and a data transmission path for transmitting the first data is not found, sending an event notification to an SMF network element;

In some possible embodiments, when the electronic device is used as an AMF network element, the processor 1010 is configured to read the computer program in the memory 1020 and perform the following operations:

receiving a first request sent by a first terminal;

and sending a PDU session context updating request to the SMF network element based on the first request, wherein the first request and the PDU session context updating request comprise related information of a second terminal, and the related information of the second terminal is used for indicating the establishment of a data transmission path.

Optionally, the first request is a service request or a registration request.

In some possible embodiments, when the electronic device is used as a terminal, the processor 1010 is configured to read the computer program in the memory 1020 and perform the following operations:

Optionally, the processor 1010 is configured to perform:

sending a PDU session modification request to an SMF network element;

Optionally, the processor 1010 is configured to perform:

receiving an identifier of a second terminal provided by an upper application;

Where, in fig. 10, the bus architecture may include any number of interconnected buses and bridges, in particular, one or more processors 1010, represented by processor 1010, and various circuits of memory 1020, represented by memory 1020, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. Bus interface 1030 provides an interface. The transceiver 1040 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1010 in performing operations. When the electronic device is used as a terminal, the user interface 1050 may also be an interface capable of connecting and disconnecting a desired device to and from different user devices, where the connected device includes, but is not limited to, a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1010 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and the processor 1010 may also have a multi-core architecture.

The processor 1010 is configured to execute any of the methods provided by the embodiments of the present application by calling the computer program stored in the memory 1020 according to the obtained executable instructions. The processor 1010 and memory 1020 may also be physically located apart.

Embodiments of the present application further provide a computer-readable storage medium, which stores a computer program for causing a processor to execute any one of the methods for establishing a data transmission path provided in the embodiments of the present application.

The computer-readable storage medium may be any available medium or data storage device that can be accessed by a processor, including but not limited to magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NANDFLASH), solid State Disks (SSDs), etc.).

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for establishing a data transmission path, wherein the method is applied to a session management function, SMF, network element, and the method comprises:

receiving a first message, wherein the first message comprises related information of a second terminal, the related information of the second terminal is used for indicating the establishment of a data transmission path, and the first message is sent by a first terminal, an access and mobility management function (AMF) network element or a first anchor point User Plane Function (UPF) network element corresponding to the first terminal;

2. The method according to claim 1, wherein the establishing a data transmission path based on the information related to the second terminal comprises:

determining relevant information of the first terminal, and determining a first anchor point UPF network element corresponding to the first terminal based on the relevant information of the first terminal;

3. The method according to claim 2, wherein the determining, based on the relevant information of the first terminal, a first anchor point UPF network element corresponding to the first terminal includes one or more of the following:

4. The method of claim 2, wherein the determining, based on the relevant information of the second terminal, a second anchor point UPF network element corresponding to the second terminal includes one or more of the following:

determining a second anchor point UPF network element corresponding to the second terminal based on the Media Access Control (MAC) address of the second terminal;

and determining a second anchor point UPF network element corresponding to the second terminal based on a second PDU session identifier of the PDU session used for transmitting data corresponding to the second terminal.

5. The method of claim 1, wherein receiving the first message comprises one or more of:

receiving a PDU session modification request sent by a first terminal;

6. The method of claim 1, further comprising:

and releasing the data transmission path.

7. A method for establishing a data transmission path is applied to a UPF network element, wherein the UPF network element is a first anchor point UPF network element corresponding to a first terminal, and the method comprises the following steps:

receiving first data sent by a first terminal;

8. The method of claim 7, wherein sending a first message to an SMF network element based on the first data comprises one or more of:

and if the first data is sent by the first terminal through the corresponding RAN node based on the dynamic IP address, sending first indication information to an SMF network element.

9. A method for establishing a data transmission path, applied to an AMF network element, the method comprising:

receiving a first request sent by a first terminal;

10. The method of claim 9, wherein the first request is a service request or a registration request.

11. A method for establishing a data transmission path, the method being applied to a first terminal, the method comprising:

determining to send first data to a second terminal, and sending a first message, wherein the first message comprises relevant information of the second terminal, and the relevant information of the second terminal is used for indicating the establishment of a data transmission path.

12. The method of claim 11, wherein sending the first message comprises one or more of:

sending a PDU session modification request to an SMF network element;

13. The method of claim 11 or 12, wherein the determining to send the first data to the second terminal comprises:

receiving an identifier of a second terminal provided by an upper application;

14. An apparatus for establishing a data transmission path, the apparatus comprising:

and the first processing unit is used for establishing a data transmission path based on the relevant information of the second terminal.

15. An apparatus for establishing a data transmission path, the apparatus comprising:

a second sending unit, configured to send a first message to the SMF network element based on the first data, where the first message includes relevant information of a second terminal, and the relevant information of the second terminal is used to indicate that a data transmission path is established.

16. An apparatus for establishing a data transmission path, the apparatus comprising:

a third sending unit, configured to send a PDU session context update request to an SMF network element based on the first request, where the first request and the PDU session context update request include relevant information of a second terminal, and the relevant information of the second terminal is used to indicate that a data transmission path is established.

17. An apparatus for establishing a data transmission path, the apparatus comprising:

a fourth sending unit, configured to determine to send first data to a second terminal, and send a first message, where the first message includes relevant information of the second terminal, and the relevant information of the second terminal is used to indicate that a data transmission path is established.

18. An SMF network element, comprising a memory, a transceiver, a processor:

19. A UPF network element, comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following:

receiving first data sent by a first terminal;

20. An AMF network element, comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following operations:

receiving a first request sent by a first terminal;

and sending a PDU session context update request to an SMF network element based on the first request, wherein the first request and the PDU session context update request comprise relevant information of a second terminal, and the relevant information of the second terminal is used for indicating the establishment of a data transmission path.

21. A terminal, comprising a memory, a transceiver, a processor:

22. A computer-readable storage medium, characterized in that it stores a computer program for causing a computer to perform the method of any one of claims 1 to 13.