CN114982311A

CN114982311A - Data closing method, device, equipment and storage medium

Info

Publication number: CN114982311A
Application number: CN202080092301.5A
Authority: CN
Inventors: 杨皓睿
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2022-08-30
Anticipated expiration: 2040-03-10
Also published as: WO2021179182A1; CN114982311B

Abstract

The application provides a data closing method, a data closing device, data closing equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: sending a first message to a first network element, the first message comprising: first indication information. Since the first indication information is used for indicating non-3 GPP data shutdown of the terminal, the data shutdown function in non-3 GPP can be realized by the carried first indication information.

Description

Data closing method, device, equipment and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data closing method, apparatus, device, and storage medium.

Background

The fifth generation (5rd generation, 5G) Network architecture not only supports the terminal to access a Public Land Mobile Network (PLMN) through a 3GPP access technology, but also supports the terminal to access the PLMN through a non-3GPP access technology. Currently, a PLMN allows a terminal to access simultaneously through a 3GPP access technology and a non-3GPP access technology, and the terminal may establish a Protocol Data Unit (PDU) session based on the 3GPP access network and the non-3GPP access network, respectively.

When the 3GPP accesses the network, the network configures the exemption service for the terminal, and under the condition of closing the flow, the data transmission of the exemption service is not influenced. In addition, when the user wants to turn off the data traffic, the terminal initiates a PDU session modification (PDU session modification) flow to the network for each PDU session (PDU session), and updates the data closing status to the network. After the network receives the data closing set by the terminal, the data transmission is not carried out, and the data charging is not carried out.

No relevant solution is currently provided how to perform data (or called data traffic) shutdown when accessing a network through a non-3GPP access technology.

Disclosure of Invention

The embodiment of the application provides a data closing method, a device, equipment and a storage medium, which can close data in a non-3GPP access technology and save user charges. The technical scheme is as follows:

in one aspect, a data closing method is provided, and is applied to a terminal, and the method includes:

sending a first message to a first network element, the first message comprising: first indication information, where the first indication information is used to indicate that non-3GPP data of the terminal is closed.

In another aspect, a data closing method is provided, and is applied to a first network element, where the method includes:

receiving a first message from a terminal, wherein the first message comprises a data closing indication of non-3GPP access;

notifying a third network element of the non-3GPP data shutdown of the terminal.

In another aspect, there is provided a data shutdown apparatus configured in a terminal, the apparatus including:

a sending module, configured to send a first message to a first network element, where the first message includes: first indication information, where the first indication information is used to indicate that non-3GPP data of the terminal is closed.

In another aspect, a data shutdown apparatus configured in a first network element is provided, where the apparatus includes:

a receiving module, configured to receive a first message from a terminal, where the first message includes a data close indication of a non-3GPP access;

a sending module, configured to notify a third network element that the non-3GPP data of the terminal is closed.

In another aspect, a terminal is provided, the terminal comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the method of any of the above aspects as performed by the terminal.

In another aspect, there is provided a first network element comprising a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the method of any one of the above aspects performed by the first network element.

In another aspect, a computer-readable storage medium is provided, having instructions stored thereon, which when executed by a processor, implement the method of the above aspect performed by a terminal, or the method performed by a first network element.

In another aspect, a computer program product is provided comprising instructions which, when run on a computer, cause the computer to perform the method performed by the terminal or the method performed by the first network element as described in the above aspects.

The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:

the terminal may send a first message to the first network element, the first message including: first indication information. Since the first indication information is used for indicating non-3GPP data shutdown of the terminal, the data shutdown function in non-3GPP can be realized by the carried first indication information.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are 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 to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an architecture diagram of a communication system provided in an exemplary embodiment of the present application;

fig. 2 is a block diagram of a 5G communication system provided by an exemplary embodiment of the present application;

FIG. 3 is a flow chart of a data closing method provided by an exemplary embodiment of the present application;

FIG. 4 is a flow chart of a data closing method provided by another exemplary embodiment of the present application;

FIG. 5 is a flowchart of a registration method provided by an exemplary embodiment of the present application;

FIG. 6 is a flow chart of a data closure method provided by another exemplary embodiment of the present application;

FIG. 7 is a schematic diagram of a data closure apparatus according to another exemplary embodiment of the present application;

FIG. 8 is a schematic diagram of a data closure apparatus according to another exemplary embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an exemplary embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.

Before describing the data closing method provided by the embodiment of the present application in detail, related terms and implementation environments related to the embodiment of the present application are briefly described.

First, the 5G core network architecture related to the present application will be explained.

The 5G (5th Generation Wireless Systems, fifth Generation mobile communication technology) core network architecture emphasizes the separation of the control plane and the user plane, including the independent scaling of the capacities of both. For example, if more control plane capacity is needed, the control plane may be expanded separately without simultaneously expanding the user plane. Second, the 5G core network architecture uses a service-based identification method, where services and functions are the focus of attention. The 5G core Network architecture mainly comprises an NF (Network Function), and is deployed according to actual needs by adopting a distributed Function. The addition and the withdrawal of new network functions do not influence the functions of the whole network.

Fig. 1 is a schematic architecture diagram of a communication system according to an exemplary embodiment of the present application. As shown in fig. 1, the communication system includes user plane functions, control plane functions, and other types of functions.

The user plane functions include: the UPF (User Plane Function), which is a gateway between the RAN and an external network such as the internet, is responsible for handling data packet routing and forwarding, packet detection, quality of service processing and packet filtering, traffic measurement, etc. It may also act as an anchor point for inter-RAT (Radio Access Technology) mobility when needed.

The control plane functions include: the SMF (Session Management Function) handles IP allocation of a terminal (also referred to as User Equipment, UE), control of policy enforcement, a general Session Management Function, and the like. The AMF (Access and Mobility Management Function) is responsible for control signaling between the core network and the terminal, security of user data, idle Mobility, and signup. Functions that run between the core network (more specifically, AMF) and the terminal are sometimes referred to AS NAS (Non-Access Stratum) to distinguish them from AS (Access Stratum), which handles functions between the terminal and the radio Access network.

In addition, the core Network of the communication system may also handle other types of functions, such as PCF (policy Control Function) responsible for policy rules, UDM (Unified Data Management) responsible for Authentication and access authorization, NEF (Network capability opening Function), NRF (NR repetition Function, NR storage Function), AUSF (Authentication server Function) handling Authentication functions, and AF (Application Function).

The specific implementation of the core network functions may be varied. For example, all functions may be implemented in a single physical node, may be distributed across multiple nodes, or may run on a cloud platform.

The 5G core Network architecture not only supports the terminal to access the PLMN (Public Land Mobile Network) through the 3GPP access technology, but also supports the terminal to access the PLMN through the non-3GPP (non-3GPP) access technology. The 3GPP Access technology may be a Radio Access Network (RAN) Radio Access technology in a 5G system or other future 3GPP Access technologies; the non-3GPP Access technology may be a Wi-Fi (Wireless Fidelity ) Access technology, a WiMAX (Worldwide interoperability for Microwave Access) technology, a CDMA (Code Division Multiple Access) Access technology, or other future non-3GPP Access technologies, which is not limited in this application.

Next, a brief description will be given of an implementation environment related to the embodiments of the present application.

Fig. 2 is a block diagram of a 5G communication system according to an exemplary embodiment of the present application, and as shown in fig. 2, when a terminal accesses a PLMN through a 3GPP access technology, the terminal accesses the PLMN through RAN equipment; when the terminal accesses the PLMN through the non-3GPP access technology, the terminal accesses the PLMN through an untrusted non-3GPP access point (untrusted-3 GPP access point) and an N3IWF (non-3GPP Interworking Function) device. The PLMN may include an AMF network element, an SMF network element, and a UPF network element. The RAN device or the N3IWF device may access the DN (Data Network) through the UPF Network element. The AMF network element is responsible for access, mobility management and the like, the SMF network element is responsible for session management and the like, and the UPF network element is responsible for routing, forwarding and the like of data packets.

The terminal communicates with the AMF network element through an interface 1 (N1 for short); the RAN equipment or the N3IWF equipment is communicated with the AMF network element through an N2 interface (N2 for short); the RAN equipment or the N3IWF equipment is communicated with the UPF network element through an N3 interface (N3 for short); the SMF network element communicates with the UPF network element through an N4 interface (N4 for short); the AMF network element communicates with the SMF network element via an N11 interface (abbreviated as N11). The interface names between the various network elements in fig. 1 are explained only as an example. Furthermore, in the 3GPP standard, there is an alternative reference point description method, which focuses on point-to-point interaction between functions, and therefore, the above interfaces may also be referred to as reference points. For example, N1 is the reference point between the UE and the AMF, and N4 is the reference point between the SMF and the UPF. The name of the reference point or the interface is not limited in the application, and the interaction between the functions can be realized.

Optionally, the RAN device mentioned above refers to a device when accessing a PLMN through a 3GPP access technology, and may be, for example, a base station, a BNG (Broadband Network Gateway), a convergence switch, and the like, which is not limited in this embodiment of the present invention. The base station may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like, which are not limited in this application.

Optionally, the above-mentioned N3IWF device refers to a device accessing the PLMN through a non-3GPP Access technology, and may be, for example, a BNG, a BRAS (Broadband Remote Access Server), a fixed Network Access gateway, a WLAN (Wireless Local Area Network) Access gateway, and the like, which is not limited in this application.

The RAN device, the N3IWF device, the AMF network element, the SMF network element, and the UPF network element in fig. 2 are not limited by names to the functions of their network elements. In the 5G network and other networks in the future, the RAN device, the N3IWF device, the AMF network element, the SMF network element, and the UPF network element may also be named by other names, which is not limited in this embodiment of the present application. For example, the N3IWF device may be replaced by an NG-PDG (Next Generation Packet Data Gateway) or N3IWF (non-3GPP Interworking Function) network element, an untrusted non-3GPP Access Gateway, an trusted non-3GPP Access Gateway, an AGF (Access Gateway Function). For example, it is also possible that the AMF network element is replaced by an AMF or an AMF entity, etc. For example, it is also possible that an SMF network element is replaced by an SMF or an SMF entity, etc. Fig. 2 is merely an illustration and does not constitute a limitation of the present application.

In addition, the PLMN may further include a system UDM network element, an AUSF network element, a PCF network element, and the like, which is not limited in this embodiment of the present application.

In the 5G network architecture, a terminal may access different AMF network elements in the same PLMN through a 3GPP access technology and a non-3GPP access technology; or according to the existing mechanism, the terminal can also access the same AMF network element in the same PLMN through a 3GPP access technology and a non-3GPP access technology; or, the terminal may access different AMF network elements in different PLMNs through a 3GPP access technology and a non-3GPP access technology, which is not limited in this embodiment.

After describing the related terms and implementation environments related to the embodiments of the present application, the data closing method provided by the embodiments of the present application will be described in detail with reference to the accompanying drawings.

Referring to fig. 3, fig. 3 is a flowchart illustrating a data closing method according to an exemplary embodiment of the present application, which may be applied in the 5G communication system illustrated in fig. 2, where the data closing method may include at least some of the following:

step 310: the terminal sends a first message to a first network element, wherein the first message comprises: the first indication information is used for indicating non-3GPP data closing of the terminal.

The first network element may be an SMF and the first message may be a PDU session setup or modification request.

The PLMN allows the terminal to access simultaneously through the 3GPP access technology and the non-3GPP access technology, and the terminal may establish a PDU (Protocol Data Unit) session (PDU session) based on the 3GPP access network and the non-3GPP access network, respectively.

After the terminal establishes the PDU session, the established PDU session may be reestablished and modified, and when the PDU session is modified, a PDU session reestablishment or modification request needs to be sent to an SMF of an access network, where the access network may be a 3GPP access network and/or a non-3GPP access network.

Because the access network is accessed with a plurality of terminals, the plurality of terminals can rebuild and modify the established PDU session after the PDU session is established. Therefore, each PDU session reestablishment or modification request sent by the terminal may carry a session ID (Identity) of the PDU session, and the AMF sends the terminal identifier to the SMF, so that the SMF may determine a unique session according to the session ID and the terminal identifier.

When a user needs to close non-3GPP data, the non-3GPP data can be closed by sending a PDU session establishment or modification request, that is, the request can carry first indication information indicating that the non-3GPP data of the terminal is closed.

In addition, as the NAS control plane function is located between the terminal and the AMF of the core network and the terminal, the control plane protocol is mainly responsible for connection establishment, mobility and security. Therefore, in the present application, the sent message or request may be implemented by NAS, and the signaling, radio bearer, and the like used in the interaction process are not limited in the present application.

The communication between the terminal and the SMF is typically indirect, where the terminal communicates via the AMF in the core network. However, as the 5G network architecture evolves, the subsequent communication system may use other communication devices or methods to perform the above communication process, and the embodiment of the present application is merely illustrated as an example and is not limited thereto.

Step 320: the first network element receives a first message from a terminal.

As shown in fig. 3, when the first network element is an SMF, and the first message is a PDU session establishment or modification request, and the SMF receives the PDU session establishment or modification request, the SMF first determines whether the PDU session establishment or modification request carries the first indication information, and notifies the UPF of non-3GPP data close of the terminal when the PDU session establishment or modification request carries the first indication information. Or, the PDU session establishment or modification request sent by the terminal to the SMF always carries the first indication information, where the first indication information is used to indicate that the non-3GPP data is closed, and the SMF needs to notify the UPF that the non-3GPP data of the terminal is closed.

Step 330: the first network element informs the third network element of the non-3GPP data closing of the terminal.

The first network element may be an SMF, and the third network element may be a UPF. Because the UPF is used for routing and forwarding data packets, detecting data packets, processing quality of service, filtering data packets, measuring flow, and the like, when the terminal informs the first network element that the non-3GPP data of the terminal is closed, the first network element may notify the UPF not to transmit the data packets sent by the terminal any more, and also stop the flow charging of the terminal in the non-3GPP access network. Thus, in the non-3GPP access network, the user charge can be saved.

When the SMF notifies the UPF that the non-3GPP data of the terminal is closed, the SMF may also carry an identifier that requires closing a session of the non-3GPP data. The UPF performs a non-3GPP data close for the session.

The communication between the SMF and the UPF may be direct communication or indirect communication through other network elements. This is not limited by the present application.

Step 340: the first network element sends a second message to the terminal.

And the first network element receives the first message, and if the first message is a PDU session establishment or modification request, the second message sent to the terminal by the first network element can be a PDU session establishment or modification completion message.

As shown in fig. 3, the SMF sends a PDU session establishment or modification completion message to the terminal, where the message is used to indicate that the non-3GPP data of the session of the terminal is closed, and the forwarding and route establishment processes of the data packet sent by the terminal are no longer performed, and meanwhile, the charging of the traffic in the non-3GPP access network of the terminal is also stopped.

Further, after notifying the non-3GPP data of the terminal to be closed to the UPF, the SMF may send a PDU session establishment or modification completion message to the terminal after waiting for the UPF to confirm that the transmission of the data packet sent by the terminal is completed. Therefore, the terminal can be informed under the condition that the data packet sent by the terminal is ensured to be sent completely, the terminal is prevented from not finishing sending important messages due to non-3GPP data closing, and the communication effectiveness of the terminal is ensured.

The communication between the SMF and the terminal is typically indirect via the AMF. However, as the 5G network architecture evolves, the subsequent communication system may use other communication devices or methods to perform the above communication process, and the embodiment of the present application is merely explained as an example, and is not limited thereto.

In this embodiment of the present application, a terminal may send a first message to a first network element, where the first message includes: and the first indication information is used for indicating the non-3GPP data closing of the terminal. After receiving the first indication information, the first network element notifies the third network element that the non-3GPP data of the terminal is closed, and then sends a second message to the terminal. Therefore, a data closing function in the non-3GPP is realized between the terminal and the core network, and the user charge is saved.

Referring to fig. 4, fig. 4 is a flowchart illustrating a data closing method according to another exemplary embodiment of the present application, where the method may be applied to the 5G communication system illustrated in fig. 2, and the data closing method may include at least part of the following contents:

step 410: the terminal sends a first message to a first network element, wherein the first message comprises: and the first indication information is used for indicating the non-3GPP data closing of the terminal.

Step 420: the first network element receives a first message from a terminal.

Step 430: the first network element informs the third network element of the non-3GPP data closing of the terminal.

Step 440: the first network element sends a second message to the terminal.

The specific implementation process of steps 410 to 440 may refer to the embodiment shown in fig. 3, and is not described herein again.

Optionally, the first network element in the above steps 410 to 440 and the following steps may be an SMF, the first message may be a PDU session setup or modification request, and the second message may be a PDU session setup or modification completion message. The third network element may be a UPF.

Step 450: and the third network element receives downlink data of the terminal.

After the terminal closes the non-3GPP data, the application server does not know that the terminal has closed the non-3GPP data traffic. There may still be downstream data sent by the application server side. If the third network element is a UPF, when the UPF receives the downlink data, the terminal that receives the downlink data is determined according to the identification information carried in the downlink data or according to the previously established routing relationship.

After determining the terminal of the received downlink data, if the terminal has closed the non-3GPP data, the UPF does not transmit the data packet. But in order to avoid the user missing important information accordingly, the UPF will inform the terminal, via other network elements, that there is downstream data.

Step 460: and the third network element informs the first network element of the existence of the downlink data of the terminal.

The method for notifying the first network element of the presence of the downlink data of the terminal by the third network element is not limited in the present application, as long as the first network element can know that the downlink data of the terminal arrives.

As an example, when the terminal is in an idle state, the notification of the arrival of the downlink data may be a paging message. When the terminal is in the connected state, the Notification of the arrival of the downlink data may be a Notification message of the NAS layer. The third network element may forward the paging message or the Notification message to the first network element.

In addition, when the third network element notifies the first network element that downlink data arrives, the notification message may carry a terminal identifier and/or a session identifier of a terminal corresponding to the downlink data.

Step 470: the first network element asks the second network element whether the terminal can use both 3GPP and non-3GPP access technologies.

Wherein, the second network element may be an AMF. When the first network element SMF receives downlink data of the terminal, the SMF does not determine the condition of the terminal accessing the core network, and therefore the SMF needs to determine the processing mode of the downlink data according to the condition of the access network in which the terminal is registered.

As an example, the SMF may send a query message to the AMF, where the query message carries a terminal identifier corresponding to the downlink data. And the AMF determines a corresponding terminal according to the terminal identification and inquires an access network registered by the terminal.

If the terminal only registers non-3GPP, no data packet transmission is carried out after the terminal closes the non-3GPP data. That is, the subsequent steps 480 to 490 are not performed.

Optionally, the SMF receives a subscription notification sent by the second network element, where the subscription notification is used to notify whether the terminal uses both 3GPP and non-3GPP access technologies.

As an example, when the second network element is an AMF, since the SMF subscribes to the registration of the terminal in advance, when the AMF receives the registration request of the terminal, the SMF is notified of the access network condition of the terminal. The access network condition of the terminal may include using a 3GPP access technology, using both non-3GPP and 3GPP access technologies, and using at least one of the non-3GPP access technologies.

In summary, after the non-3GPP data of the terminal is closed, and the user also uses the 3GPP access technology, the following steps 480 to 490 are performed. That is, when the terminal is registered with 3GPP and non-3GPP at the same time and downlink data arrives, the first network element triggers the second network element to send an arrival notification of the downlink data to the terminal.

Step 480: and the second network element sends a notice of the arrival of the downlink data to the terminal.

The arrival notification may carry indication information of the downlink data, such as a service identifier or a data identifier corresponding to the downlink data, which is not limited in the present application.

In addition, when the terminal is in an idle state, the arrival notification of the downlink data may be a paging message. When the terminal is in the connected state, the Notification of the arrival of the downlink data may be a Notification message of the NAS layer.

Step 490: and the terminal receives the arrival notice of the downlink data sent by the second network element.

Optionally, the PDU session corresponding to the downlink data is switched from the non-3GPP access to the 3GPP access, and the switched PDU session is used to receive the downlink data.

That is, when the terminal receives the notification of the arrival of the downlink data, the terminal may select to receive the downlink data through the registered 3GPP access network, so as to avoid missing the important session message.

Optionally, the arrival notification of the downlink data may carry indication information of the downlink data, so that a user may determine whether to perform receiving handover according to the indication information.

In this embodiment, when the non-3GPP data of the terminal is closed and there is downlink data of the terminal, it may be further determined whether the terminal uses both 3GPP and non-3GPP access technologies. And when the terminal simultaneously uses 3GPP and non-3GPP access technologies and downlink data arrives, the first network element triggers the second network element to send a downlink data arrival notice to the terminal. The terminal receives the arrival notification of the downlink data, can switch the PDU session corresponding to the downlink data from the non-3GPP to the 3GPP, and receives the downlink data by using the switched PDU session. Thus, on the basis of realizing the non-3GPP data closing function, the terminal using the 3GPP and non-3GPP access technologies simultaneously can be informed that the arrival information of the downlink data of the terminal exists, and the terminal can receive the downlink data by switching different access networks, thereby avoiding missing important session information.

Based on the embodiments shown in fig. 3 and fig. 4, in the non-3GPP access network, there is no unified provision and limitation for whether the terminal and the core network have the capability of closing non-3GPP data, so that the terminal may report whether the terminal has the capability of closing non-3GPP data when accessing the core network. Meanwhile, the second network element may also inform the terminal whether the core network to be accessed has the capability of closing the non-3GPP data.

Referring to fig. 5, fig. 5 is a flowchart of a registration method according to an exemplary embodiment of the present application, where the method may be applied to the 5G communication system shown in fig. 2, and the data closing method may include at least some of the following:

step 510: and the terminal sends a third message to the second network element, wherein the third message comprises capability information which is used for indicating whether the terminal has the capability of closing the non-3GPP data.

Since the terminal needs to register with the AMF each time the terminal accesses the core network, the second network element may be the AMF, and the third message may be a registration request for requesting to access the core network using a non-3GPP access technology, or the registration request for requesting to access the core network using a 3GPP access technology. It should be noted that, the terminal may use both 3GPP and non-3GPP access technologies to access the core network, and the access technology adopted by the terminal is not limited in the present application.

If the third message is a registration request, the trigger time for sending the registration request by the terminal may be when the terminal registration fails, when the terminal leaves the current registration area, or when the terminal needs to re-register to the core network each time.

The terminal may carry the capability information in the sent registration request, or may carry the capability information in other message requests, which is not limited in the present application, but only needs to determine whether the upper side has the capability of non-3GPP data closing through interaction between the terminal and the core network.

Step 520: the second network element receives a third message from the terminal.

When receiving the third message of the terminal, the AMF needs to determine whether the terminal uses the non-3GPP access network, and further needs to determine whether a service supporting the non-3GPP access network exists in the subscription information of the terminal.

The subscription information includes service information subscribed by the terminal, identity information of the terminal, and the like, which is not limited in the present application. The service information of the terminal is stored in the fourth network element, which may be unified data management, as an example.

The second network element may be obtained from a fourth network element UDM, when required. Secondly, after the terminal registers to the second network element, the second network element also stores the subscription information of the terminal, but the subscription information stored in the second network element also fails when the registered access network fails.

As an example, when the terminal is a mobile phone, during a short power-on restart of the terminal, the subscription information of the terminal stored by the second network element is still valid.

Therefore, if the third message is a registration request, the second network element determines whether the subscription information of the terminal is valid or not after receiving the registration request from the terminal, and if the subscription information of the terminal is invalid, the subscription information of the terminal is acquired from the UDM.

Step 530: the second network element sends a fourth message to the terminal, wherein the fourth message comprises: and second indication information, wherein the second indication information is used for indicating whether the core network has the capability of non-3GPP data closing.

If the third message sent by the terminal is a registration request, the fourth message sent by the second network element to the terminal may be a registration completion message.

As an example, when subscription information of the terminal is determined and the terminal has a capability of non-3GPP data close, the AMF sends a registration completion message to the terminal. The registration completion message is used to notify the terminal that the terminal has successfully accessed to the core network through the non-3GPP access technology, and can use the network for communication.

Step 540: the terminal receives a fourth message from the second network element.

After receiving the fourth message, the terminal may determine whether the core network has the capability of non-3GPP data shutdown. After the terminal and the core network have the capability of non-3GPP data shutdown at the same time, the non-3GPP data shutdown operation may be performed by using the embodiments shown in fig. 3 or fig. 4.

In this embodiment, when the terminal sends the third message to the second network element to connect to the core network through the non-3GPP access technology, the third message includes capability information, where the capability information is used to indicate whether the terminal has a capability of turning off non-3GPP data. Meanwhile, the second network element may also notify the terminal through the fourth message whether the core network to be accessed has the capability of closing the non-3GPP data. In the application, the terminal and the core network can mutually determine whether the terminal and the core network have the capability of closing the non-3GPP data, so that the effectiveness of closing the non-3GPP data can be improved. The problem that a user generates more expenses in the process of using network communication because one party does not have the capability of closing non-3GPP data is avoided.

Based on the above-described several embodiments, the subscription information of the terminal may have exempt services configured by the operator and the core network to the user. After the terminal is closed in the non-3GPP data, the exemption service can still use the network for communication. Therefore, when the terminal closes the non-3GPP data, further, the exemption service of the terminal can be determined, and it is ensured that the exemption service can still be normally used after the terminal closes the non-3GPP data. For example, the exempt service configured by the core network includes a telephone, a short message, a file, and the like.

Referring to fig. 6, fig. 6 is a flowchart of a data closing method according to another exemplary embodiment of the present application, which may be applied in the above 5G communication system shown in fig. 2, and the data closing method may further include at least some of the following contents, based on the several embodiments:

step 610: and acquiring the second exemption service from the fourth network element.

Optionally, the second exemption service may be all exemption services signed by the terminal, or may be a part of exemption services signed by the terminal, and this application does not limit this.

The second exempt service may be that the second network element acquires from the fourth network element and sends to the terminal through the fourth message.

Step 620: the second network element sends a fourth message to the terminal, wherein the fourth message comprises: second indication information and service information of a second exempt service.

The second indication information is used for indicating whether the core network has the capability of closing the non-3GPP data, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.

In addition, in step 610, the second exempt service may also be that the first network element acquires from the fourth network element and sends to the terminal through the second message. As such, the above step 620 may be replaced with the following step 630:

step 630: the first network element sends a second message to the terminal, wherein the second message comprises: service information of a second exempt service.

Fig. 6 further includes a registration process of the terminal to the second network element, a non-3GPP data closing process of the terminal, and a situation when downlink data exists after data closing, where the above processes may refer to the embodiments shown in fig. 3, fig. 4, and fig. 5, which are not described herein again, and steps 610 to 630 only explain an acquisition process of the second exemption service.

In summary, the terminal may obtain the second exemption service from the fourth message, may also obtain the second exemption service from the second message, and may also obtain the second exemption service in other manners. In addition, the core network can also inform the terminal of the corresponding second exemption service through other network elements, and the application does not limit the time and the mode for the terminal to acquire the second exemption service or the core network to issue the second exemption service.

Based on the embodiment shown in fig. 6, in the non-3GPP access network, the terminal may also determine its own exemption service, and notify the determined exemption service to the core network.

The terminal may notify the core network of the exemption service determined by the terminal when sending the third message to the second network element. The terminal may also send a first message to the first network element, and notify the core network of the exemption service determined by the terminal, where the first message may be a PDU session establishment or modification request. Next, the two possible implementations will be explained separately.

(1) And the terminal sends a third message to the second network element, wherein the third message comprises capability information, and the capability information is used for indicating whether the terminal has the capability of closing the non-3GPP data.

Optionally, the third message further comprises: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.

That is, the third message sent by the terminal may include capability information and service information of the first exempt service, and the service information of the first exempt service may be a service identifier, a service category, a service attribute, and the like. The third message may be a registration request, and the fourth message sent by the second network element to the terminal may be a registration completion message in a case that the third message sent by the terminal to the second network element is a registration request.

Therefore, in a possible implementation manner, after receiving the third message, the second network element obtains the subscription information of the terminal from the fourth network element, determines the second exemption service according to the subscription information of the terminal, and then sends a fourth message to the terminal, where the fourth message includes: the second indication information is used for indicating whether the core network has the capability of closing the non-3GPP data, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.

As an example, the exempt service subscribed by the terminal includes: service 1, service 2, service 3, service 4, and service 5. And the second network element determines that the second exemption service available at the moment by the terminal is as follows according to the communication condition of the non-3GPP network accessed by the terminal: and if the terminal is closed, the service 1, the service 2 and the service 4 can be normally used after the non-3GPP data is closed.

In the foregoing implementation manner, no matter what the first exemption service sent by the terminal is, the second network element informs the terminal of the second exemption service that can be used in the core network at this time. Therefore, the exemption service which can be normally used after the terminal can determine to close the non-3GPP data can be ensured.

In another possible implementation manner, after receiving the third message, the second network element obtains the subscription information of the terminal from the fourth network element. And then sending a fourth message to the terminal, wherein the fourth message comprises: the second indication information is used for indicating whether the core network has the capability of non-3GPP data closing or not, the third exemption service is determined according to the first exemption service and the second exemption service, the first exemption service is the exemption service determined by the terminal, and the second exemption service is the full set or the subset of the exemption service signed by the terminal.

As an example, the exempt service subscribed by the terminal includes: service 1, service 2, service 3, service 4, and service 5. The second network element determines, according to the communication status of the non-3GPP network to which the terminal is accessed, that the second exemption service available at the time by the terminal is: service 1, service 2 and service 4, the first exemption service sent by the terminal includes: service 1 and service 3. The second network element sends the service 1 to the terminal through the registration completion message, and the service 1 can be normally used after the terminal closes the non-3GPP data.

In the implementation manner, when determining the exemption service that can be used by the terminal, the decision of the terminal is fully considered, and according to the first exemption service determined by the terminal and the second exemption service configured by the core network, the service that can be normally used by the terminal after the non-3GPP data is closed is determined, so that the determined third exemption service is more in line with the target requirement of the user under the condition that the availability is guaranteed.

(2) The terminal sends a first message to a first network element, wherein the first message comprises: and the first indication information is used for indicating the non-3GPP data closing of the terminal.

Optionally, the first message further comprises: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.

That is, the terminal sends the first message, which may include the first indication information and the service information of the first exempt service, and the service information of the first exempt service may be a service identifier, a service category, a service attribute, and the like. The first message may be a PDU session setup or modification request, and the second message sent by the first network element to the terminal may be a PDU session setup or modification completion message in the case that the first message sent by the terminal to the first network element is the PDU session setup or modification request.

Therefore, in a possible implementation manner, after receiving the first message, the first network element obtains subscription information (a second exemption service) of the terminal from the fourth network element, and then sends a second message to the terminal, where the second message includes service information of the second exemption service, and the second exemption service is a full set or a subset of the exemption service subscribed by the terminal.

Optionally, the first network element may further obtain subscription information of the terminal from the second network element.

As an example, the exempt service subscribed by the terminal includes: service 1, service 2, service 3, service 4, and service 5. The first network element determines that the second exemption service available at the moment by the terminal is as follows according to the communication condition of the non-3GPP network accessed by the terminal: and for the service 1, the service 2 and the service 4, the first network element sends a message for completing the establishment or modification of the service 1, the service 2 and the service 4 through a PDU session to the terminal, and the service 1, the service 2 and the service 4 can be normally used after the terminal closes the non-3GPP data.

In the foregoing implementation manner, regardless of what the first exemption service sent by the terminal is, the first network element informs the terminal of the second exemption service that can be used in the core network at this time. Therefore, the terminal can ensure that the exemption service can be normally used after the non-3GPP data is closed.

In another possible implementation manner, after receiving the first message, the first network element obtains subscription information (a second exemption service) of the terminal from the fourth network element or the second network element, and then sends the second message to the terminal, where the second message includes service information of a third exemption service, the third exemption service is determined according to the first exemption service and the second exemption service, the first exemption service is the exemption service determined by the terminal, and the second exemption service is a full set or a subset of the exemption service subscribed by the terminal.

As an example, the exempt service subscribed by the terminal includes: service 1, service 2, service 3, service 4, and service 5. The first network element determines that the second exemption service available at the moment by the terminal is as follows according to the communication condition of the non-3GPP network accessed by the terminal: service 1, service 2 and service 4, the first exempt service sent by the terminal includes: service 1 and service 3. The first network element sends the service 1 to the terminal through the PDU session establishment or modification completion message, and the service 1 can be normally used after the terminal closes the non-3GPP data.

In the above implementation, the decision of the terminal is fully considered when determining the exemption service that the terminal can use. And determining the services which can be normally used by the terminal after the non-3GPP data is closed according to the first exemption service determined by the terminal and the second exemption service configured by the core network, so that the determined third exemption service is more in accordance with the target requirements of the user under the condition of ensuring the availability.

It should be understood that any combination of the above registration process, the first exempt traffic transmission manner, the data closing method, the second exempt traffic transmission manner, and the third exempt traffic transmission manner is within the scope of the present application, and the above embodiments are for illustration purposes only and are not limited. It should be appreciated that other trigger opportunities may be implemented, and other implementations may be implemented, including, but not limited to, any combination of the above.

Fig. 7 is a schematic structural diagram illustrating a data closing apparatus according to an exemplary embodiment, where the apparatus 700 may be configured in a terminal, and the apparatus 700 includes:

a sending module 710, configured to send a first message to a first network element, where the first message includes: and the first indication information is used for indicating the non-3GPP data closing of the terminal.

Optionally, the first network element is a session management function SMF, and the first message is a protocol data unit PDU session establishment or modification request.

Optionally, the apparatus 700 further comprises:

a receiving module 720, configured to receive a second message from the first network element, where the second message includes: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services signed by the terminal.

Optionally, the receiving module 720 is further configured to:

receiving a second message from the first network element, the second message comprising: and service information of a third exemption service, wherein the third exemption service is determined according to the first exemption service and the second exemption service, the first exemption service is the exemption service determined by the terminal, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.

Optionally, the second message is a protocol data unit, PDU, session establishment or modification completion message.

Optionally, the terminal may use both 3GPP and non-3GPP access technologies, and the apparatus 700 further includes:

a receiving module 720, configured to receive an arrival notification of the downlink data sent by the second network element;

the switching module 730 is configured to switch a PDU session corresponding to the downlink data from the non-3GPP to the 3GPP, and receive the downlink data using the switched PDU session.

Optionally, the sending module 710 is further configured to:

and sending a third message to the second network element, wherein the third message comprises capability information, and the capability information is used for indicating whether the terminal has the capability of closing the non-3GPP data.

Optionally, the second network element is an access and mobility management function AMF, and the third message is a registration request.

Optionally, the receiving module 720 is further configured to:

receiving a fourth message from the second network element, the fourth message comprising: and second indication information, wherein the second indication information is used for indicating whether the core network has the capability of non-3GPP data closing.

Optionally, the fourth message further includes: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services signed by the terminal.

Optionally, the fourth message further includes: and service information of a third exemption service, wherein the third exemption service is determined according to the first exemption service and the second exemption service, the first exemption service is the exemption service determined by the terminal, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.

Optionally, the fourth message is a registration completion message.

In this embodiment of the present application, a terminal may send a first message to a first network element, where the first message includes: first indication information. Since the first indication information is used for indicating non-3GPP data shutdown of the terminal, the data shutdown function in non-3GPP can be realized by the carried first indication information.

Fig. 8 is a schematic structural diagram illustrating a data closing apparatus according to an exemplary embodiment, where the apparatus has a first network element running thereon, and the apparatus 800 includes:

a receiving module 810, configured to receive a first message from a terminal, where the first message includes a data close indication of a non-3GPP access;

a sending module 820, configured to notify the third network element that the non-3GPP data of the terminal is closed.

Optionally, the sending module 820 is further configured to:

and informing the third network element of the service information of the exemption service of the terminal.

Optionally, the first network element is a session management function SMF, the third network element is a user plane function UPF, and the first message is a protocol data unit PDU session establishment or modification request.

Optionally, the service information of the exempt service of the terminal includes: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.

Optionally, the service information of the exempt service of the terminal includes: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services signed by the terminal.

Optionally, the sending module 820 is further configured to:

sending a second message to the terminal, the second message comprising: service information of a second exempt service.

Optionally, the service information of the exempt service of the terminal includes: and the third exemption service is determined by the first exemption service and the second exemption service, the first exemption service is determined by the terminal, and the second exemption service is the full set or the subset of the exemption service signed by the terminal.

Optionally, the sending module 820 is further configured to:

sending a second message to the terminal, the second message comprising: and service information of a third exempt service.

Optionally, the first message carries service information of the first exempt service.

Optionally, the apparatus 800 further comprises:

an obtaining module 830, configured to obtain the second exemption service from the fourth network element.

Optionally, the fourth network element manages the UDM for unified data.

Optionally, the apparatus 800 further comprises:

the triggering module 840 is configured to trigger the second network element to send an arrival notification of downlink data to the terminal when the terminal uses both 3GPP and non-3GPP access technologies and downlink data arrives.

Optionally, the apparatus 800 further comprises:

an inquiring module 850, configured to inquire of the second network element whether the terminal uses both 3GPP and non-3GPP access technologies;

or the like, or, alternatively,

a receiving module 810, configured to receive a subscription notification sent by the second network element, where the subscription notification is used to notify the terminal whether to use both 3GPP and non-3GPP access technologies.

Optionally, the second network element is an access and mobility management function AMF.

In the embodiment of the application, a first network element receives a first message from a terminal, wherein the first message comprises a data closing indication of non-3GPP access; and informing the third network element of the non-3GPP data closing of the terminal. Therefore, after the third network element learns that the non-3GPP data of the terminal is closed, the data charging in the non-3GPP access network can be stopped, the data closing function in the non-3GPP can be realized, and the network charge of the user is saved.

Referring to fig. 9, a schematic structural diagram of a communication device (a terminal or an access network device) provided in an exemplary embodiment of the present application is shown, where the communication device includes: a processor 901, a receiver 902, a transmitter 903, a memory 904, and a bus 905.

The processor 901 includes one or more processing cores, and the processor 901 executes various functional applications and information processing by executing software programs and modules.

The receiver 902 and the transmitter 903 may be implemented as one communication component, which may be a communication chip.

The memory 904 is coupled to the processor 901 via a bus 905.

The memory 904 may be configured to store at least one instruction, which the processor 901 is configured to execute to implement the various steps performed by the first IAB network device in the various method embodiments described above.

Further, the memory 904 may be implemented by any type or combination of volatile or non-volatile storage devices, including, but not limited to: magnetic or optical disk, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), magnetic Memory, flash Memory, PROM (Programmable Read-Only Memory).

The present application provides a computer-readable storage medium, where at least one instruction is stored, and the at least one instruction is loaded and executed by the processor to implement the data closing method provided by the foregoing method embodiments.

The present application further provides a computer program product, which when running on a computer, causes the computer to execute the data closing method provided by the above method embodiments.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

A data closing method is applied to a terminal, and the method comprises the following steps:

sending a first message to a first network element, the first message comprising: first indication information, wherein the first indication information is used for indicating non-3GPP data closing of the terminal.
The method of claim 1, wherein the first message further comprises: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.
The method according to claim 1 or 2, wherein the first network element is a session management function, SMF, and the first message is a protocol data unit, PDU, session establishment or modification request.
The method of claim 1, further comprising:

receiving a second message from the first network element, the second message comprising: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services signed by the terminal.
The method of claim 2, further comprising:

receiving a second message from the first network element, the second message comprising: and service information of a third exemption service, wherein the third exemption service is determined according to a first exemption service and a second exemption service, the first exemption service is the exemption service determined by the terminal, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.
The method according to claim 4 or 5, wherein the second message is a protocol data unit, PDU, session establishment or modification completion message.
The method according to any of claims 1-6, wherein the terminal can use both 3GPP and non-3GPP access technologies, the method further comprising:

receiving an arrival notification of downlink data sent by a second network element;

and switching the PDU session corresponding to the downlink data from the non-3GPP to the 3GPP, and receiving the downlink data by using the switched PDU session.
The method of any of claims 1-6, further comprising:

and sending a third message to a second network element, wherein the third message comprises capability information, and the capability information is used for indicating whether the terminal has the capability of non-3GPP data closing.
The method of claim 8, wherein the third message further comprises: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.
The method according to any of claims 7-9, wherein said second network element is an access and mobility management function, AMF, and wherein said third message is a registration request.
The method according to any one of claims 1-10, further comprising:

receiving a fourth message from the second network element, the fourth message comprising: second indication information, where the second indication information is used to indicate whether a core network has a capability of non-3GPP data shutdown.
The method of claim 11, wherein the fourth message further comprises: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services signed by the terminal.
The method of claim 11, wherein the fourth message further comprises: service information of a third exemption service, the third exemption service being determined according to the first exemption service and the second exemption service, the first exemption service being the exemption service determined by the terminal, and the second exemption service being a full set or a subset of the exemption service subscribed by the terminal.
The method of any of claims 11-13, wherein the fourth message is a registration complete message.
A data closing method, applied to a first network element, the method comprising:

receiving a first message from a terminal, wherein the first message comprises a data closing indication of non-3GPP access;

notifying a third network element of the non-3GPP data shutdown of the terminal.
The method of claim 15, further comprising:

and notifying the third network element of the service information of the exemption service of the terminal.
The method according to claim 15 or 16, wherein the first network element is a session management function, SMF, the third network element is a user plane function, UPF, and the first message is a protocol data unit, PDU, session establishment or modification request.
The method of claim 16, wherein the service information of the exempt service of the terminal comprises: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.
The method of claim 16, wherein the service information of the exempt service of the terminal comprises: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services signed by the terminal.
The method of claim 19, further comprising:

sending a second message to the terminal, the second message comprising: service information of the second exempt service.
The method of claim 16, wherein the service information of the exempt service of the terminal comprises: and service information of a third exemption service, wherein the third exemption service is determined by a first exemption service and a second exemption service, the first exemption service is determined by the terminal, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.
The method of claim 21, further comprising:

sending a second message to the terminal, the second message comprising: service information of the third exempt service.
The method of claim 18 or 21, wherein the first message carries service information of the first exempt service.
The method according to claim 19 or 21, further comprising:

and acquiring the second exemption service from a fourth network element.
The method of claim 24, wherein the fourth network element is a Unified Data Management (UDM).
The method of any one of claims 15-25, further comprising:

and when the terminal uses the 3GPP and non-3GPP access technologies at the same time and downlink data arrives, triggering a second network element to send an arrival notice of the downlink data to the terminal.
The method of claim 20, further comprising:

inquiring the second network element whether the terminal uses the 3GPP and non-3GPP access technologies simultaneously;

or the like, or, alternatively,

and receiving a subscription notification sent by the second network element, where the subscription notification is used to notify the terminal whether to use the 3GPP and non-3GPP access technologies simultaneously.
The method according to claim 26 or 27, wherein said second network element is an access and mobility management function, AMF.
A data shutdown device, configured in a terminal, the device comprising:

a sending module, configured to send a first message to a first network element, where the first message includes: first indication information, wherein the first indication information is used for indicating non-3GPP data closing of the terminal.
The apparatus of claim 29, wherein the first message further comprises: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.
The apparatus of claim 29 or 30, wherein the first network element is a session management function, SMF, and wherein the first message is a protocol data unit, PDU, session setup or modification request.
The apparatus of claim 29, further comprising:

a receiving module, configured to receive a second message from the first network element, where the second message includes: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services signed by the terminal.
The apparatus of claim 30, wherein the receiving module is further configured to:

receiving a second message from the first network element, the second message comprising: and service information of a third exemption service, wherein the third exemption service is determined according to a first exemption service and a second exemption service, the first exemption service is the exemption service determined by the terminal, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.
The apparatus of claim 32 or 33, wherein the second message is a protocol data unit, PDU, session setup or modification complete message.
The apparatus of any of claims 29-34, wherein the terminal can use both 3GPP and non-3GPP access technologies, the apparatus further comprising:

the receiving module is configured to receive an arrival notification of the downlink data sent by the second network element;

a switching module, configured to switch the PDU session corresponding to the downlink data from the non-3GPP to the 3GPP, and receive the downlink data using the switched PDU session.
The apparatus of any one of claims 29-34, wherein the sending module is further configured to:

and sending a third message to a second network element, wherein the third message comprises capability information, and the capability information is used for indicating whether the terminal has the capability of non-3GPP data closing.
The apparatus of claim 36, wherein the third message further comprises: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.
The arrangement according to any of the claims 35-37, characterised in that said second network element is an access and mobility management function, AMF, and said third message is a registration request.
The apparatus according to any of claims 29-38, wherein the receiving module is further configured to:

receiving a fourth message from the second network element, the fourth message comprising: second indication information, wherein the second indication information is used for indicating whether a core network has the capability of non-3GPP data closing.
The apparatus of claim 39, wherein the fourth message further comprises: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services subscribed by the terminal.
The apparatus of claim 39, wherein the fourth message further comprises: and service information of a third exemption service, wherein the third exemption service is determined according to a first exemption service and a second exemption service, the first exemption service is the exemption service determined by the terminal, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.
The apparatus of any of claims 39-41, wherein the fourth message is a registration complete message.
A data closing apparatus, configured in a first network element, the apparatus comprising:

a receiving module, configured to receive a first message from a terminal, where the first message includes a data close indication of a non-3GPP access;

a sending module, configured to notify a third network element that the non-3GPP data of the terminal is closed.
The apparatus of claim 43, wherein the sending module is further configured to:

and notifying the third network element of the service information of the exemption service of the terminal.
The apparatus of claim 43 or 44, wherein the first network element is a Session Management Function (SMF), the third network element is a User Plane Function (UPF), and the first message is a Protocol Data Unit (PDU) session establishment or modification request.
The apparatus of claim 44, wherein the service information of the exempt service of the terminal comprises: service information of a first exempt service, the first exempt service being an exempt service determined by the terminal.
The apparatus of claim 44, wherein the service information of the exempt service of the terminal comprises: service information of a second exempt service, the second exempt service being a full set or a subset of exempt services signed by the terminal.
The apparatus of claim 47, wherein the sending module is further configured to:

sending a second message to the terminal, the second message comprising: service information of the second exempt service.
The apparatus of claim 44, wherein the service information of the exempt service of the terminal comprises: and service information of a third exemption service, wherein the third exemption service is determined by a first exemption service and a second exemption service, the first exemption service is determined by the terminal, and the second exemption service is a full set or a subset of the exemption service signed by the terminal.
The apparatus of claim 49, wherein the sending module is further configured to:

sending a second message to the terminal, the second message comprising: service information of the third exempt service.
The apparatus according to claim 46 or 49, wherein the first message carries service information of the first exempt service.
The apparatus as claimed in claim 47 or 49, further comprising:

and the obtaining module is used for obtaining the second exemption service from a fourth network element.
The apparatus of claim 52, wherein the fourth network element is a Unified Data Management (UDM).
The apparatus of any one of claims 43-53, further comprising:

and the triggering module is used for triggering the second network element to send the arrival notification of the downlink data to the terminal under the condition that the terminal simultaneously uses 3GPP and non-3GPP access technologies and the downlink data arrive.
The apparatus of claim 48, further comprising:

an inquiry module, configured to inquire of the second network element whether the terminal uses the 3GPP and non-3GPP access technologies at the same time;

or the like, or a combination thereof,

the receiving module is configured to receive a subscription notification sent by the second network element, where the subscription notification is used to notify the terminal whether to use the 3GPP and the non-3GPP access technologies simultaneously.
The apparatus according to claim 54 or 55, wherein the second network element is an access and mobility management function, AMF.
A terminal, characterized in that the terminal comprises a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the steps of the method of any one of claims 1-14.
A first network element, characterized in that the first network element comprises a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the steps of the method of any one of claims 15-28.
A computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the method of any of claims 1-11.
A computer readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the method of any of claims 15-28.