CN110784912A

CN110784912A - Management method of session correspondence and terminal equipment

Info

Publication number: CN110784912A
Application number: CN201810858812.8A
Authority: CN
Inventors: 窦凤辉; 何彦召; 金辉
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-07-31
Filing date: 2018-07-31
Publication date: 2020-02-11
Anticipated expiration: 2038-07-31
Also published as: CN110784912B; WO2020024865A1

Abstract

The application provides an embodiment of a session correspondence management method, which is used for effectively optimizing an internal mechanism of a terminal device, reducing data transmission delay and reducing unnecessary power consumption. According to the method, the terminal equipment determines the available state of the PDU session according to the first information and sends the data related to the PDU session according to the available state of the PDU session. The application also provides an embodiment of a DNN available state management method, and the terminal device determines the DNN available state according to the first information and is ready to send data related to a protocol data unit PDU session corresponding to the DNN according to the DNN available state.

Description

Management method of session correspondence and terminal equipment

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a management method for session correspondence.

Background

The 5th-Generation (5G) communication era will have billions of internet-of-things devices accessing the network, and the demands of different types of application scenarios on the network are different. The network slicing technology provides mutually isolated network environments for different application scenes in a mode of simulating an independent logic network on the same network infrastructure, so that different application scenes can customize network functions and characteristics according to respective requirements, and requirements of different services are met.

In 5G Network devices, the concept of Local Area Data Network (LADN) is introduced, that is, a Data Network (DN) that a terminal device can only access in a specific Area (LADN Service Area, LADN SA). That is, a PDU session with a Data Network Name (DNN) of LADN DNN can only be established if the terminal device is located in the LADN SA.

Currently, before a terminal device initiates a related procedure of a PDU session, it needs to traverse configuration of a LADN DNN and corresponding LADN information to determine whether the procedure can be initiated, which causes low efficiency of executing the procedure, increases transmission delay, and generates unnecessary power consumption.

Disclosure of Invention

The application describes a session correspondence management method to improve PDU session execution flow efficiency, optimize an internal processing mechanism of a terminal device, and reduce unnecessary power consumption and unnecessary data transmission between an application processor and a modem.

In a first aspect, an embodiment of the present application provides a method for managing a session correspondence relationship, where a terminal device establishes a data protocol unit PDU session, and the method specifically includes: the terminal equipment determines the available state of the PDU session according to first information, wherein the first information comprises one or more of DNN (data network name), LADN (local area data network) information and position information of the terminal equipment; and the terminal equipment sends the data related to the PDU conversation according to the available state of the PDU conversation. By implementing the embodiment, the internal mechanism of the terminal equipment can be effectively optimized, the data transmission time delay is reduced, and the unnecessary power consumption is reduced.

In a possible implementation manner, the DNN information is used by the terminal device to determine whether a DNN corresponding to the PDU session is a LADN DNN.

In a possible implementation manner, when the DNN corresponding to the PDU session is a LADN DNN, the LADN information is used by the terminal device to determine whether the terminal device is located in a service area corresponding to the DNN.

In a possible implementation manner, the determining, by the terminal device, the PDU session available status according to the first information includes one of the following cases: when the DNN corresponding to the PDU session is not the LADN DNN, the terminal equipment determines that the PDU session state is available; or when the DNN corresponding to the PDU session is the LADN DNN and the terminal equipment is located in the service area corresponding to the DNN, the terminal equipment determines that the PDU session state is available; or when the DNN corresponding to the PDU session is the LADN DNN but the terminal equipment is located outside the service area corresponding to the DNN, the terminal equipment determines that the PDU session state is unavailable.

In one possible implementation, the terminal device includes a modem and an application processor, and is characterized by including: the modem determines the PDU session available state according to the first information; the modem sends the data related to the PDU conversation according to the available state of the PDU conversation; or the modem sends the PDU session available status to the application processor; the available status of the PDU session is used by the application processor to determine to send the PDU session related data to the modem.

In one possible implementation manner, the transmitting, by the modem, the PDU session related data according to the PDU session available status includes: when the PDU session related data needs to be sent and the available state of the PDU session is available, the modem sends the PDU session related data to a network device; or when the PDU session related data needs to be sent but the PDU session state is unavailable, the modem discards the PDU session related data.

In one possible implementation manner, when the PDU session related data needs to be sent and the PDU session available status is available, the modem sends the PDU session related data to a network device, and the method further includes the modem acquiring a rejection message sent by the network device, where the rejection message includes a cause value that a LADN is unavailable; the modem sets the PDU session available state according to the cause value.

In a possible implementation manner, the terminal device includes a modem and an application processor, and is characterized by including that the application processor acquires the PDU session available state sent by the modem; and the application processor determines to send the data related to the PDU session according to the available state of the PDU session.

In one possible implementation, the application processor sends the PDU session related data according to the PDU session available status, including when the PDU session related data needs to be sent and the PDU session available status is available, the application processor sends the PDU session related data to a network device; or when the PDU session related data needs to be sent but the PDU session state is unavailable, the application processor discards the PDU session related data. In a second aspect, an embodiment of the present application provides a method for managing a DNN correspondence relationship, where the method is applied to a terminal device, and includes: the terminal equipment determines the DNN available state according to first information, wherein the first information comprises one or more of DNN information, Local Area Data Network (LADN) information and terminal equipment position information; and the terminal equipment sends the data related to the protocol data unit PDU session corresponding to the DNN according to the available state of the DNN.

In one possible embodiment, the DNN information is used for the terminal device to determine whether the DNN is a LADN DNN. In a possible implementation, when the DNN is a LADN DNN, the LADN information is used for the terminal device to determine whether the DNN is located within a service area corresponding to the DNN.

In a possible implementation manner, the terminal device determines the DNN available state according to the first information, including one of the following cases:

when the DNN is not the LADN DNN, the terminal equipment determines that the DNN available state is available; or when the DNN is the LADN DNN and the terminal equipment is located in a service area corresponding to the DNN, the terminal equipment determines that the DNN available state is available; or when the DNN is the LADN DNN but the terminal equipment is located outside the service area corresponding to the DNN, the terminal equipment determines that the DNN available state is unavailable.

In one possible embodiment, the terminal device includes a modem and an application processor, and includes: the modem determines the DNN available state according to the first information; the modem sends data of the PDU session related to the DNN according to the DNN available state; or the modem sending the DNN available status to the application processor, the DNN available status being used for the application processor to determine to send data for the DNN related PDU sessions to the modem.

In one possible embodiment, the modem sending data of the DNN-related PDU session according to the DNN available status includes: when data of the DNN-related PDU session needs to be sent and the DNN available state is available, the modem sends the PDU session-related data to a network device; or when data of the DNN related PDU session needs to be sent but the DNN available state is unavailable, the modem discards the PDU session related data.

In one possible embodiment, when the data of the PDU session related to the DNN needs to be sent and the DNN available status is available, the modem sends the data related to the PDU session to a network device, and the method further includes the modem acquiring a rejection message sent by the network device, wherein the rejection message includes a cause value that LADN is unavailable; the modem sets the DNN available state according to the cause value.

In one possible embodiment, the terminal device includes a modem and an application processor, and includes: the application processor acquires the DNN available state sent by the modem; and the application processor sends the data related to the PDU session according to the DNN available state.

In one possible embodiment, the sending, by the application processor, data of the PDU session related to the DNN according to the DNN available status includes: when data of the DNN-related PDU session needs to be sent and the DNN available state is available, the application processor sends the PDU session-related data to a network device; or when the data of the DNN related PDU session needs to be sent but the DNN available state is unavailable, the application processor discards the PDU session related data.

In a third aspect, an embodiment of the present application provides a terminal device for a session correspondence management method, where the terminal device includes a modem and an application processor, and the modem includes: the first determining unit is used for determining the PDU session available state according to first information, wherein the first information comprises one or more of data network name DNN information, local area data network LADN information and terminal equipment position information; the first sending unit is used for sending the data related to the PDU session according to the available state of the PDU session or sending the available state of the PDU session to the application processor; the available status of the PDU session is used by the application processor to determine to send the PDU session related data to the modem.

In a possible implementation manner, the first sending unit sends the PDU session related data according to the PDU session available status, including when the PDU session related data needs to be sent and the PDU session available status is available, the first sending unit sends the PDU session related data to a network device; or when the data related to the PDU session needs to be sent but the PDU session state is unavailable, the first sending unit discards the data related to the PDU session. In a possible implementation manner, when the PDU session related data needs to be sent and the PDU session available status is available, the first sending unit sends the PDU session related data to a network device, and the modem further includes a first obtaining unit that obtains a rejection message sent by the network device, where the rejection message includes a cause value that an LADN is unavailable; and the first setting unit is used for setting the PDU conversation available state according to the reason value.

In a fourth aspect, an embodiment of the present application provides a terminal device for a session correspondence management method, where the terminal device includes a modem and an application processor, and the application processor includes a second obtaining unit, which obtains a PDU session available state sent by the modem; and the second sending unit determines to send the data related to the PDU session according to the available state of the PDU session.

In a possible implementation manner, the second sending unit sends the PDU session related data according to the PDU session available status, including when the PDU session related data needs to be sent and the PDU session available status is available, the second sending unit sends the PDU session related data to a network device; or when the PDU session related data needs to be transmitted but the PDU session state is unavailable, the second transmitting unit discards the PDU session related data.

In a fifth aspect, an embodiment of the present application provides a terminal device of a method for managing a DNN correspondence, where the terminal device includes a modem and an application processor, the modem includes a second determining unit, and determines a DNN available state according to first information, where the first information includes one or more of DNN information, local area data network LADN information, and terminal device location information; a third sending unit, configured to send data of a protocol data unit PDU session related to the DNN according to the DNN available state; or sending the DNN available status to the application processor, the DNN available status being used for the application processor to determine to send data of the DNN related PDU session to the modem.

In a possible implementation, the third sending unit sends the data of the DNN-related PDU session according to the DNN available status, including when the data of the DNN-related PDU session needs to be sent and the DNN available status is available, the third sending unit sends the data of the PDU session to a network device; or when the data of the PDU session related to the DNN needs to be sent but the available state of the DNN is unavailable, the third sending unit discards the data related to the PDU session.

In a possible implementation manner, when data of the PDU session related to the DNN needs to be sent and the DNN available state is available, the third sending unit sends the data related to the PDU session to a network device, and the method modem further includes a third obtaining unit that obtains a rejection message sent by the network device, where the rejection message includes a cause value that a LADN is unavailable; a second setting unit that sets the DNN available state according to the cause value.

In a sixth aspect, an embodiment of the present application provides terminal equipment of a method for managing a DNN correspondence relationship between data network names, where the terminal equipment includes a modem and an application processor, and the application processor includes a fourth obtaining unit, and obtains a DNN available state sent by the modem; and the fourth sending unit is used for sending the data related to the PDU session according to the DNN available state.

In a possible implementation manner, the fourth sending unit sends the data of the PDU session related to DNN according to the DNN available status, and the application processor includes when the data of the PDU session related to DNN needs to be sent and the DNN available status is available, the fourth sending unit sends the data related to PDU session to the network device; or when the data of the PDU session related to the DNN needs to be sent but the DNN available status is unavailable, the fourth sending unit discards the data related to the PDU session.

In a seventh aspect, an embodiment of the present application provides a terminal device, including one or more processors; one or more memories in which one or more computer programs are stored, the one or more computer programs comprising instructions which, when executed by the one or more processors, cause the terminal device to perform the method as described in the first aspect above.

In an eighth aspect, an embodiment of the present application provides a terminal device, including one or more processors; one or more memories in which one or more computer programs are stored, the one or more computer programs comprising instructions which, when executed by the one or more processors, cause the terminal device to perform the method according to the second aspect as described above.

In a ninth aspect, embodiments of the present application provide a computer program product comprising instructions, which, when run on a terminal device, cause the terminal device to perform the method according to the first aspect.

In a tenth aspect, embodiments of the present application provide a computer program product containing instructions that, when run on a terminal device, cause the terminal device to perform the method according to the second aspect.

In an eleventh aspect, embodiments of the present application provide a computer-readable storage medium, which includes instructions that, when executed on a terminal device, cause the electronic terminal device to perform the method according to the first aspect.

In a twelfth aspect, embodiments of the present application provide a computer-readable storage medium, which includes instructions that, when executed on a terminal device, cause the electronic terminal device to perform the method according to the second aspect.

Compared with the prior art, the technical scheme of the application can avoid traversing and configuring the LADN DNN when the PDU session establishment process is initiated each time; when the terminal equipment is outside the LADN SA, data or signaling related to the LADN is prevented from being transmitted between the application processor and the modem, unnecessary power consumption is reduced, and time delay of data transmission is reduced.

Drawings

Fig. 1 is a schematic diagram of a system according to an embodiment of the present application;

fig. 2 is a schematic diagram of a terminal device according to an embodiment of the present application;

fig. 3 is a schematic diagram illustrating a management method for session correspondence according to an embodiment of the present application;

fig. 4 is a schematic diagram illustrating an interaction method between a modem and an application processor of a terminal device according to a session mapping relationship management method provided in an embodiment of the present application;

fig. 5 is a schematic diagram illustrating a PDU session available state updating method according to an embodiment of the present application;

fig. 6 is a schematic diagram illustrating a management method for DNN correspondence of a data network according to an embodiment of the present application;

fig. 7 is a schematic diagram illustrating an interaction method between a modem and an application processor of a terminal device according to a DNN mapping management method provided in an embodiment of the present application;

fig. 8 is a schematic diagram illustrating a DNN available state updating method according to an embodiment of the present application;

fig. 9 is a schematic diagram of a modem of a terminal device according to a session mapping relationship management method provided in an embodiment of the present application;

fig. 10 is a schematic diagram of an application processor of a terminal device according to a session correspondence management method provided in an embodiment of the present application;

fig. 11 is a schematic diagram of a modem of a terminal device for a DNN available state management method according to an embodiment of the present application;

fig. 12 is a schematic diagram of an application processor of a terminal device according to a DNN available state management method provided in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be understood by those skilled in the art, however, that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure the embodiments. It is to be understood that the embodiments described below are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In some of the flows described below, operations are included in a particular order, but it should be understood that the operations may be performed out of order or in parallel as they appear herein, with the order of the operations, e.g., 101, 102, etc., merely to distinguish one operation from another, and the order of the operations does not by itself represent any order of performance. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel.

It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different. The term "if" used herein means that a certain condition or state is satisfied, and includes the meanings of "when", "after the condition is satisfied", "judgment is satisfied", and the like. A "message" is a carrier that carries a number of information, including signaling, communication signals, data messages, and the like in a variety of forms.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long term evolution (Long term evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System or a New Radio network (NR, New) System, etc.

FIG. 1 is a schematic diagram illustrating a system 100 applicable to embodiments of the present application. As shown in fig. 1, the system 100 may specifically include: an access and mobility management function (AMF) network element, a Session Management Function (SMF) network element, a User Plane Function (UPF) network element, a Radio Access Network (RAN) device: and a User Equipment (UE).

Optionally, the system 100 may further include: one or more of a network storage function (NRF) network element, an authentication service function (AUSF) network element, a Unified Data Management (UDM) network element, a Policy Control Function (PCF) network element, and a Data Network (DN).

Wherein, the AMF network element: the mobile terminal is responsible for access and mobility management and has the functions of authenticating, switching, updating the position and the like for the user.

NRF network element: and the service discovery system is responsible for storing network functions and service information and supporting the discovery functions of the services and the network functions (namely, receiving network function query requests and providing the discovered information of the network functions). It should be understood that the NRF network element may interface with any other network element, which is not limited in this embodiment of the application and therefore is not shown in fig. 1.

SMF network element: and is responsible for session management, including establishment, modification, release, etc. of Packet Data Unit (PDU) sessions.

AUSF network element: the authentication and authorization service function is provided for generating a secret key and performing bidirectional authentication with the UE.

UDM network element: the subscription data of the user is stored.

PCF network element: and is responsible for user policy management, including both mobility-related policies and PDU session-related policies, such as quality of service (QoS) policies, charging policies, and the like.

UPF network element: the UPF is a user plane function and is responsible for forwarding user data.

DN: the destination of the user's PDU session access.

Wherein, the UE communicates with the AMF through an N1 interface, and the UE can access the 5G network through the RAN. The RAN communicates with the AMF through an N2 interface, the RAN communicates with the UPF through an N3 interface, the UPF communicates with the SMF through an N4 interface, the UPF communicates with the DN through an N6 interface, the AMF communicates with the SMF through an N11 interface, the AMF communicates with the AUSF through an N12 interface, the AMF communicates with the UDN through an N8 interface, the AMF communicates with the PCF through an N15 interface, the SMF communicates with the UDM through an N10 interface, and the SMF communicates with the PCF through an N7 interface.

It should be noted that fig. 1 only illustrates a terminal device as a UE, an interface name between network elements in fig. 1 is only an example, and in a specific implementation, the interface name of the system 100 may also be other names, which is not specifically limited in this embodiment of the present application. In addition, the RAN device may also be referred to as an access gateway device, and the access network device refers to a device accessing a core network.

The access network device is a device in which the terminal device is accessed into the mobile communication system in a wireless manner, and may be a base station (NodeB), an evolved node b (eNodeB), a base station (gNB) in the 5G mobile communication system, a base station in the future mobile communication system, an access node in the WiFi system, or the like, and may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the access network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in the future 5G network, a network device in the future evolved PLMN network, or the like.

Of course, other network elements, for example, a Network Slice Selection Function (NSSF) network element, may also be deployed in the system 100, which is not specifically limited in this embodiment of the present invention.

The terminal device (terminal device) referred to in the embodiments of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem with wireless communication capability; a subscriber unit (subscriber unit), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a Personal Digital Assistant (PDA) computer, a tablet computer, a wireless modem (modem), a handheld device (dhhand), a laptop computer (laptop), a cordless phone (cordless phone) or a Wireless Local Loop (WLL) station, a Machine Type Communication (MTC) terminal, a User Equipment (UE), a Mobile Station (MS) or a relay user equipment, etc. may also be included. The relay user equipment may be, for example, a 5G home gateway (RG). For convenience of description, the above-mentioned devices are collectively referred to as terminal devices in this application.

In this application, the terminal device may obtain the LADN information from the AMF in the system 100, so as to implement the PDU session dynamic adjustment method provided in this application.

Fig. 2 is a schematic diagram of a terminal device provided in an embodiment of the present application. As shown in fig. 2, the terminal device 200 includes an application processor 201 and a modem 202.

The application processor 201 generally includes functions such as an application program and an operating system, and also handles wireless communication functions of the terminal device. The application processor 201 includes an application layer 203, a framework layer 204, and a system layer 205, where the application layer 203 provides an application processing function for the terminal device, the framework layer 204 provides various interfaces for the application to implement the related functions of the application, and the system layer 205 provides an operating system, such as an android operating system, for the terminal device. In the present application, the application processor 201 may obtain the PDU session available status or PDU session related data and other information sent by the modem 202.

The modem 202, which is provided with 3GPP defined wireless communication protocol functionality and can interact with the network device and the application processor 201, respectively, has the functionality to determine the PDU session available status and to send the PDU session available status or PDU session related data to the application processor 201. The modem 202 may include a modulator 206 and a demodulator 207. The modulator 206 is configured to modulate a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator 207 is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. In the present application, the modem 202 sends PDU session related data to the network device.

Fig. 3 is a management method for session correspondence provided in an embodiment of the present application. By the method, the terminal equipment can optimize an internal mechanism and reduce power consumption. As shown in fig. 3, the terminal device has a PDU session, and the specific method includes:

s301 the terminal device registers with the network device.

In some embodiments, the terminal device registers with the network device for obtaining first information of a registration area of the terminal device.

S302, the terminal equipment stores the first information and determines the available state of the PDU conversation according to the first information.

The first information includes one or more of data network name DNN information, Local Area Data Network (LADN) information, and location information of the terminal device.

In some embodiments, the data network name DNN information is used by the terminal device to determine whether the DNN is a LADN DNN, i.e., whether the data network corresponding to the DNN is a local data network. Further, the DNN information may be configured in the terminal device through a SIM (subscriber identity Module) card.

In some embodiments, the LADN information includes LADN DNN and corresponding Service Area (SA) information that the terminal device may obtain from the AMF in a Registration Procedure or UE configuration Update Procedure (UEConfiguration Update).

In some embodiments, the location information of the terminal device includes a Tracking Area (TA) or a base station identifier (bs id) where the terminal device is located, a cell identifier (cell id), and the like. The terminal device may obtain the location information of the terminal device by reading the system information.

In some embodiments, the terminal device obtains a DNN of the current PDU session, and queries in a LADN DNN list, and when a corresponding DNN is queried, the DNN corresponding to the current PDU session is a LADN DNN.

Further, when the DNN corresponding to the PDU session is a LADN DNN, the terminal device determines whether the terminal device is located in a service area corresponding to the DNN according to the LADN information.

S303, the terminal equipment sends the related data of the PDU conversation to the network equipment according to the available state of the PDU conversation.

It should be noted that the related data of the PDU Session includes messages related to the PDU Session operation, such as a PDU Session Establishment Request message (PDU Session Establishment Request), a PDU Session modification Request message (PDU Session modification Request), and a PDU Session release Request message (PDU Session Establishment Request). The data associated with the PDU session also includes the data packets transmitted through the PDU session.

Fig. 4 is a diagram illustrating an interaction method between a modem and an application processor when a terminal device is in an available status according to a PDU session according to an embodiment of the present application. The specific method comprises the following steps:

s401 the network device sends first information to the modem.

Specifically, the terminal device registers on the network device, and the network device sends the first information to a modem of the terminal device. The first information is the same as the above embodiments, and is not described herein again

The S402 modem configures LADN information according to the first information.

For example, the LADN information includes a correspondence between LADN DNN and SA, and is expressed in the form of a lookup table, as shown in table 1. The LADN DNN in table 1 is automatically filled according to the terminal device configuration, and the LADN SA is filled to the corresponding position in table 1 after the modem receives the LADN information.

LADN DNN	LADN SA
		DNN1	LADN SA1
DNN2	LADN SA2
		DNN3	null

TABLE 1

S403, the application processor sends a connection establishment request to the modem, wherein DNN information is carried in the request.

S404, the modem determines to establish connection according to the first information and requests the network to establish PDU conversation.

For example, the modem queries the corresponding relationship between the LADN DNN and the SA according to the DNN, determines that the TA where the terminal is located in the SA, and triggers the PDU session establishment procedure.

S405, a PDU session is established between the terminal equipment and the network equipment.

In S405, the process of establishing the PDU session is as described in standard 3GPP TS23.502, and will not be described herein.

S406 determines an available status of the PDU session according to the first information.

In some embodiments, the modem determines from the first information that the terminal device may establish the PDU session. After the PDU session is established, the modem stores an attribute identifier of the PDU session for recording whether the PDU session is a LADN session and whether the PDU session is located in a LADN SA.

Specifically, the correspondence between the PDU session ID and the PDU session attribute identifier is shown in table 2. In the example of Table 2, the PDU session attribute identifications are Non-LADN, LADN & in SA, and LADN & out SA, respectively. Non-LADN indicates that the PDU session is a Non-LADN session, LADN & in SA indicates that the PDU session is a LADN session and is at SA, and LADN & out SA indicates that the PDU session is a LADN session but is not at SA.

Further, when the TA is changed, whether the terminal equipment is in the corresponding SA is determined according to the first information, and then information whether the PDU session is in the SA is updated. For example, for a LADN session, when the terminal device is at TA1, TA1 does not belong to a SA, and the PDU session is identified as "LADN & out SA". When the terminal device location becomes TA2, TA2 belongs to SA and PDU session identity is updated to "LADN & in SA".

PDU session ID	PDU session attribute identification
		session 1	Non-LADN
session 2	LADN&in SA
		s ession 3	LADN&out SA

TABLE 2

Further, the modem maps the available status of the PDU session according to the attribute identifier of the PDU session, and determines the first corresponding relationship, where the available status of the PDU session is as shown in table 3, and the available status of the PDU session is true (indicating that the PDU session is available) and false (indicating that the PDU session is not available), respectively.

As can be seen from table 2, when the PDU session identifier is Non-LADN or LADN & in SA, the PDU session available state obtained by mapping is true; when the PDU session identifier is LADN & out SA, the mapped PDU session state is false. When the PDU session available status is true, the application processor may transmit PDU session related data to the modem, and the modem may transmit PDU session related data to the network; when the PDU session available status is false, the application processor may not transmit PDU session related data to the modem, and the modem may not transmit PDU session related data to the network.

PDU session ID	PDU session available status
		session 1	true
session 2	true
		session 3	false

TABLE 3

The modem sends a connection setup response to the application processor S407.

For example, when the PDU session is successfully established, the modem sends information of DNN, IP address and the like of the session to the application processor; when a PDU session cannot be established or the establishment fails, the modem sends a session rejection request to the application processor.

Further, the modem and the application processor may be two modules located in the same processor, or may be two separate processors.

Based on the same technical concept, fig. 5 is an embodiment of a PDU session available status updating method provided by the present application. As shown in fig. 5, when the first information is changed, the PDU session available status is updated accordingly. The specific method comprises the following steps:

s501, updating the first information, and the modem updating the PDU session available status.

Specifically, when the LADN information or the TA changes, the PDU session availability status is updated, and the PDU session attribute identifier is updated accordingly. For example, when the LADN DNN information in the LADN information changes, the corresponding SA also changes, so that the modem determines whether the terminal device is in the corresponding SA according to the updated first information, and updates the PDU session available status and the corresponding PDU session identifier.

The modem sends a connection update request to the application processor S502.

The application processor updates the PDU session available state and executes subsequent operation according to the received connection updating request.

S503 the application processor determines that the related data of the PDU session can be transmitted according to the PDU session available status.

When the related data of the PDU session reaches the application processor, the available state of the PDU session is true, the related data of the PDU session can be sent, and otherwise, the related data of the PDU session is not sent. Specifically, when determining that the data related to the PDU session can be sent, the application processor sends the data related to the PDU session to the modem, and the modem performs an operation according to a protocol between the data related to the PDU session and the network device.

S504, the modem determines whether the related flow of the PDU session can be initiated according to the available state of the PDU session.

For example, when the modem needs to send the related data of the PDU session, the modem determines whether the related flow of the PDU session can be initiated according to the PDU session available state, and the related flow of the PDU session is used for activating, modifying or deleting the PDU session.

Further, steps S503 and S504 may be performed in one step, or may be performed in two steps.

S505 the application processor sends the related data of the PDU session to the network device.

Specifically, the application processor determines the availability of the PDU session

S506 the modem acquires the rejection message sent by the network device.

In some embodiments, the reject message includes a cause value that is unavailable, for example, the cause value is "LADN notify AVAILABLE", which may be represented by an encoding meaning of two bytes or three bytes, for example, "00" or "000" represents "LADN not AVAILABLE", which is not specifically limited in this application.

The modem updates the first information and the PDU session available status according to the reject message S507.

In some embodiments, when the terminal device receives the rejection message, the content in the correspondence between the LADN DNN and the SA is corrected according to the DNN information and the TA, and when the correspondence includes a corresponding DNN and a corresponding SA, and the SA includes the rejected TA, the TA is deleted. If the corresponding relation does not have the corresponding DNN, the DNN is added in the corresponding relation, the TA is added in the corresponding SA, meanwhile, the PDU session identifier is updated to 'LADN & out SA', and the available state of the PDU session is updated to 'false'.

In some embodiments, after the terminal device releases or adds the TA in the SA, the terminal device receives the SA configured by the network device, and the SA configured by the network device is used as the standard for the terminal device. If the terminal device deletes the TA locally, the SA configured by the network device also does not include the TA, and the terminal device does not perform other operations. If the terminal equipment deletes the TA locally and the SA configured by the network equipment comprises the TA, the terminal equipment adds the TA to the SA.

S508 the modem sends a session update request to the application processor.

The session update request is the same as the process executed in step S502, and is not described herein again.

Fig. 6 is an embodiment of a method for managing a DNN correspondence relationship of a data network according to the present application, and the specific method shown in fig. 6 is as follows:

s601, the terminal device configures first information and determines the available DNN state according to the first information.

The first information is the same as the above embodiments, and is not described herein again. The DNN available status is used to indicate whether the terminal device DNN is available.

It should be noted that the DNN available representation may establish, modify, and release a PDU session corresponding to the DNN, or may send data through a PDU session corresponding to the DNN. The DNN is unavailable to indicate that the PDU session corresponding to the DNN cannot be established, modified, released, or data cannot be transmitted through the PDU session corresponding to the DNN.

S602, the terminal device sends PDU conversation relative data to the network device.

The method of S602 is the same as the above embodiments, and is not described herein again.

The embodiment can avoid the situation that the terminal equipment needs to traverse the configured LADN DNN and the corresponding LADN information when initiating the establishment, modification, release and user plane establishment processes of the PDU session each time so as to determine whether the establishment, modification, release and user plane establishment processes of the PDU session can be initiated, thereby reducing the time delay of data transmission and reducing the power consumption of the terminal equipment.

Fig. 7 is an interaction method between a modem and an application processor of a terminal device according to a DNN mapping management method provided in this embodiment of the present application. The specific method comprises the following steps:

s701 the network device sends first information to the modem.

Specifically, the same as step S501 in the above embodiment, which is not described herein again.

S702, the modem configures the corresponding relation of the available DNN states according to the first information.

In some embodiments, the modem determines a correspondence between laddnn, SA, and DNN available status according to the LADN information and DNN information in the first information, and the correspondence may be presented in a table form, as shown in table 4.

LADN DNN	LADN SA	DNN available State
			DNN1	LADN SA1	true
DNN2	LADN SA2	false
			DNN3	NULL	false

TABLE 4

As shown in table 4, according to the LADN information configured by the terminal device, the modem fills the LADN DNN into DNN1, the corresponding SA into LADN SA1, and the modem determines that the DNN available state is "true" at this time according to the current location information, and automatically fills in table 4.

The modem of S703 determines the available state of DNN and updates the corresponding relation of the available state of DNN according to the first information.

The modem updates the corresponding relation of the available DNN state according to the first information sent by the network equipment and automatically fills the updated information. For example, the modem correspondingly populates "LADN SA 3" with LADN DNN of "DNN 3" according to the first information, and the DNN available state becomes "true".

S704 the modem sends a DNN available status to the application processor.

S705 the first information update, the modem updates the DNN available status and the corresponding relationship of the DNN available status.

For example, the location information of the terminal device is updated in the first information, the LADN SA corresponding to the LADN DNN of "DNN 1" is changed to "LADN SA 2", and the modem changes the corresponding DNN available state to "false".

The modem sends the DNN available status to the application processor S706.

The DNN available status sent by the modem to the application processor may be represented in table form, as shown in table 5.

LADN DNN	DNN available State
		DNN1	true
DNN2	false
		DNN3	false

TABLE 5

Based on the same technical concept, fig. 8 illustrates an embodiment of a DNN available state updating method provided by the present application. As shown in fig. 8, the specific method is as follows:

s801, the application processor determines that the PDU session related data can be sent according to the DNN available state.

In some embodiments, the application processor determines that PDU session-related data may be sent to the modem when the DNN available state is "true" according to table 5.

The S802 modem determines that PDU session related data can be sent according to the DNN available state.

In some embodiments, the modem determines that PDU session-related data may be sent to the network device when the DNN available state is "true" as shown in table 5. Specifically, the modem transmits directly to the network device.

The above steps S801 and S802 are performed separately, i.e., step S802 is not performed when step S801 is performed, and vice versa.

S803 transmits PDU session-related data.

The PDU session related data is the same as the above embodiments, and is not described herein again.

S804 the modem acquires the LADN reject message sent by the network device.

The LADN reject message is the same as the above embodiments, and is not described herein again.

And the S805 modem updates the corresponding relation of the LADN DNN, the SA and the DNN available state according to the rejection message and updates the DNN available state.

In some embodiments, when the terminal device receives the LADN rejection message, the content in the correspondence between laddnn, SA and DNN information is modified according to the DNN information and the TA. For example, when there is a corresponding DNN and a corresponding SA in the correspondence, and the SA includes a rejected TA, the TA is deleted, and the DNN available status is updated to "false". When the terminal equipment locally releases or adds the TA in the SA, the terminal equipment receives the configuration of the network equipment, and the configuration of the terminal network is taken as the standard. If the terminal device deletes the TA locally and the SA configured by the subsequent network device does not include the TA, the terminal device does not perform other operations. If the terminal equipment deletes the TA locally and the SA configured by the subsequent network equipment comprises the TA, the terminal equipment adds the TA to the SA.

The modem sends a DNN available status to the application processor S806.

For example, the modem updates the DNN available status to "false" and sends it to the application processor, and the application processor updates the PDU session available status corresponding to DNN to "false".

In some embodiments, when the available state of the corresponding DNN is "true", the application processor may send a PDU session connect request for the corresponding DNN or send data related to the PDU session for the corresponding DNN to the modem.

The above embodiments ensure that the application processor does not send the modem the instructions and data related to the LADN PDU session when the terminal device is outside the LADN SA.

Fig. 9 is an example of a modem 900 of a terminal device according to a session correspondence management method provided in the present application. As shown in fig. 9, the modem 900 includes a first determining unit 901, a first transmitting unit 902, a first acquiring unit 903, and a first setting unit 904. The first determining unit 901 is configured to determine an available state of a PDU session according to the first information, the first sending unit is configured to send data related to the PDU session according to the available state of the PDU session or send the available state of the PDU session to the application processor, the first obtaining unit 903 is configured to obtain a rejection message sent by the network device, and the first setting unit 904 sets the available state of the PDU session according to a cause value in the rejection message.

Further, when the data related to the PDU session needs to be sent and the available status of the PDU session is available, the first sending unit sends the data related to the PDU session to the network device; or when the data related to the PDU session needs to be sent but the PDU session state is unavailable, the first sending unit discards the data related to the PDU session.

It is to be understood that fig. 9 only illustrates the means of the modem implementing the terminal device handling session correspondence management method. In practical applications, the apparatus may include any module that can implement the above embodiments, and all the modules in the apparatus may be integrated or separated, and all the apparatuses that can implement the present application are within the protection scope of the present application.

Fig. 10 is an example of an application processor 1000 of a terminal device according to a session correspondence management method provided in the present application. As shown in fig. 10, the application processor 1000 includes a second acquisition unit 1001 and a second transmission unit 1002. The second obtaining unit 1001 is configured to obtain a PDU session availability status sent by the modem, and the second sending unit 1002 is configured to determine to send data related to a PDU session according to the PDU session availability status.

Further, when the data related to the PDU session needs to be sent and the available status of the PDU session is available, the second sending unit sends the data related to the PDU session to the network device; or when the PDU session related data needs to be transmitted but the PDU session state is unavailable, the second transmitting unit discards the PDU session related data.

It is to be understood that fig. 10 only shows an apparatus of an application processor implementing the terminal device processing session correspondence management method. In practical applications, the apparatus may include any module that can implement the above embodiments, and all the modules in the apparatus may be integrated or separated, and all the apparatuses that can implement the present application are within the protection scope of the present application.

Fig. 11 is an example of a modem 1100 of a terminal device for a DNN available state management method provided in the present application. As shown in fig. 11, the modem 1100 includes a second determining unit 1101, a third sending unit 1102, a third obtaining unit 1103, and a second setting unit 1104. The second determining unit 1101 is configured to determine a DNN available state according to the first information, the third sending unit 1102 is configured to send data of a protocol data unit PDU session related to DNN according to the DNN available state or send the DNN available state to the application processor, the third obtaining unit 1103 is configured to obtain a rejection message sent by the network device, and the second setting unit 1104 is configured to set the DNN available state according to the cause value.

In some embodiments, when data of a PDU session related to DNN needs to be sent and the DNN available status is available, the third sending unit sends the data related to the PDU session to the network device; or, when the data of the PDU session related to the DNN needs to be sent but the DNN available state is unavailable, the third sending unit discards the data related to the PDU session.

It will be appreciated that fig. 11 only shows the means of the modem implementing the method for handling DNN available state management by the terminal device. In practical applications, the apparatus may include any module that can implement the above embodiments, and all the modules in the apparatus may be integrated or separated, and all the apparatuses that can implement the present application are within the protection scope of the present application.

Fig. 12 is an example of an application processor 1100 of a terminal device according to a DNN available state management method provided in the present application. As shown in fig. 12, the application processor 1200 includes a fourth acquisition unit 1201 and a fourth transmission unit 1202. The fourth obtaining unit 1201 is configured to obtain DNN available status sent by the modem, and the fourth sending unit 1202 is configured to send PDU session related data according to the DNN available status.

Further, when data of a PDU session related to DNN needs to be sent and the DNN available state is available, the fourth sending unit sends the data related to the PDU session to the network device; or when the data of the PDU session related to the DNN needs to be sent but the available state of the DNN is unavailable, the fourth sending unit discards the data related to the PDU session.

It is to be understood that fig. 12 only shows an apparatus implementing an application processor of the terminal device handling DNN available state management method. In practical applications, the apparatus may include any module that can implement the above embodiments, and all the modules in the apparatus may be integrated or separated, and all the apparatuses that can implement the present application are within the protection scope of the present application.

The embodiment of the application also provides a computer program product. The computer program product comprises computer software instructions which can be loaded by a processor for implementing the method in the above-described method embodiments.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) 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 program instructions. These computer program 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 computer program instructions may also be stored in a computer-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 computer-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 computer program 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.

Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein 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 for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A management method for session correspondence, a terminal device establishes a data protocol unit (PDU) session, characterized by comprising:

the terminal equipment determines the available state of the PDU session according to first information, wherein the first information comprises one or more of DNN (data network name), LADN (local area data network) information and position information of the terminal equipment;

and the terminal equipment sends the data related to the PDU conversation according to the available state of the PDU conversation.

2. The method of claim 1, wherein the DNN information is used by the terminal device to determine whether a DNN corresponding to the PDU session is a LADN DNN.

3. The method of claim 1 or 2, wherein when the DNN corresponding to the PDU session is a LADN DNN, the LADN information is used by the terminal device to determine whether the terminal device is located within the service area corresponding to the DNN.

4. The method of claim 1, wherein the terminal device determines the PDU session available status according to the first information, and wherein the determining comprises one of:

when the DNN corresponding to the PDU session is not the LADN DNN, the terminal equipment determines that the PDU session state is available; or

When the DNN corresponding to the PDU session is the LADN DNN and the terminal equipment is located in the service area corresponding to the DNN, the terminal equipment determines that the PDU session state is available; or

And when the DNN corresponding to the PDU session is the LADN DNN but the terminal equipment is positioned outside the service area corresponding to the DNN, the terminal equipment determines that the PDU session state is unavailable.

5. The method of any of claims 1-4, wherein the terminal device includes a modem and an application processor, and wherein the method comprises:

the modem determines the PDU session available state according to the first information;

the modem sends the data related to the PDU conversation according to the available state of the PDU conversation; or the like, or, alternatively,

the modem sends the PDU session available status to the application processor;

the available status of the PDU session is used by the application processor to determine to send the PDU session related data to the modem.

6. The method of claim 5, wherein the modem sends the PDU session related data according to the PDU session available status, comprising:

when the PDU session related data needs to be sent and the available state of the PDU session is available, the modem sends the PDU session related data to a network device; alternatively, the first and second electrodes may be,

when the PDU session related data needs to be sent but the PDU session state is unavailable, the modem discards the PDU session related data.

7. The method of claim 5 or 6, wherein the modem sends the PDU session related data to a network device when the PDU session related data needs to be sent and the PDU session available status is available, the method further comprising:

the modem acquires a rejection message sent by the network equipment, wherein the rejection message comprises a cause value that LADN is unavailable;

the modem sets the PDU session available state according to the cause value.

8. The method of any of claims 1-4, wherein the terminal device includes a modem and an application processor, and wherein the method comprises:

the application processor acquires the PDU session available state sent by the modem;

and the application processor determines to send the data related to the PDU session according to the available state of the PDU session.

9. The method of claim 8, wherein the transmitting, by the application processor, the PDU session related data according to the PDU session available status comprises:

when the PDU session related data needs to be sent and the available state of the PDU session is available, the application processor sends the PDU session related data to a network device; or the like, or, alternatively,

when the PDU session related data needs to be sent but the PDU session state is unavailable, the application processor discards the PDU session related data.

10. A management method for DNN corresponding relation of data network names is applied to terminal equipment and is characterized by comprising the following steps:

the terminal equipment determines the DNN available state according to first information, wherein the first information comprises one or more of DNN information, Local Area Data Network (LADN) information and terminal equipment position information;

and the terminal equipment sends the data related to the protocol data unit PDU session corresponding to the DNN according to the available state of the DNN.

11. The method of claim 10, wherein the DNN information is used by the terminal device to determine whether the DNN is a LADN DNN.

12. The method according to claim 10 or 11, comprising:

and when the DNN is a LADN DNN, the LADN information is used for the terminal equipment to determine whether the DNN is located in a service area corresponding to the DNN.

13. The method of claim 10, wherein the terminal device determines the DNN available state according to the first information, and wherein the DNN available state comprises one of:

when the DNN is not the LADN DNN, the terminal equipment determines that the DNN available state is available; or

When the DNN is the LADN DNN and the terminal equipment is located in a service area corresponding to the DNN, the terminal equipment determines that the DNN available state is available; or

And when the DNN is the LADN DNN but the terminal equipment is positioned outside the service area corresponding to the DNN, the terminal equipment determines that the DNN available state is unavailable.

14. The method according to any of claims 10-13, wherein the terminal device comprises a modem and an application processor, comprising:

the modem determines the DNN available state according to the first information;

the modem sends data of the PDU session related to the DNN according to the DNN available state; or

The modem sends the DNN available status to the application processor, the DNN available status being used for the application processor to determine to send data for the DNN related PDU sessions to the modem.

15. The method of claim 14, wherein the modem sending data for the DNN-related PDU sessions according to the DNN available status comprises:

when data of the DNN-related PDU session needs to be sent and the DNN available state is available, the modem sends the PDU session-related data to a network device; alternatively, the first and second electrodes may be,

when data of the DNN-related PDU session needs to be sent but the DNN available state is unavailable, the modem discards the PDU session-related data.

16. The method of claim 14 or 15 wherein the modem sends the PDU session related data to a network device when the data for the DNN related PDU session needs to be sent and the DNN available status is available, the method further comprising:

the modem sets the DNN available state according to the cause value.

17. The method according to any of claims 10-13, wherein the terminal device comprises a modem and an application processor, comprising:

the application processor acquires the DNN available state sent by the modem;

and the application processor sends the data related to the PDU session according to the DNN available state.

18. The method of claim 17, wherein the sending, by the application processor, data for the DNN-related PDU session based on the DNN available status comprises:

when data of the DNN-related PDU session needs to be sent and the DNN available state is available, the application processor sends the PDU session-related data to a network device; or the like, or, alternatively,

when data of the DNN-related PDU session needs to be sent but the DNN available state is unavailable, the application processor discards the PDU session-related data.

19. A terminal device for a session correspondence management method, the terminal device comprising a modem and an application processor, wherein the modem comprises:

the first determining unit is used for determining the PDU session available state according to first information, wherein the first information comprises one or more of data network name DNN information, local area data network LADN information and terminal equipment position information;

the first sending unit is used for sending the data related to the PDU session according to the available state of the PDU session or sending the available state of the PDU session to the application processor;

20. The modem of claim 19, wherein the first sending unit sends the PDU session related data according to the PDU session available status, comprising:

when the data related to the PDU session needs to be sent and the available state of the PDU session is available, the first sending unit sends the data related to the PDU session to network equipment; or the like, or, alternatively,

when the PDU session related data needs to be sent but the PDU session state is unavailable, the first sending unit discards the PDU session related data.

21. The modem according to claim 19 or 20, wherein the first sending unit sends the PDU session related data to a network device when the PDU session related data needs to be sent and the PDU session available status is available, the modem further comprising:

the first obtaining unit is used for obtaining a rejection message sent by the network equipment, wherein the rejection message comprises a cause value that the LADN is unavailable;

and the first setting unit is used for setting the PDU conversation available state according to the reason value.

22. A terminal device for a session correspondence management method, the terminal device comprising a modem and an application processor, wherein the application processor comprises:

the second acquisition unit is used for acquiring the PDU session available state sent by the modem;

and the second sending unit determines to send the data related to the PDU session according to the available state of the PDU session.

23. The application processor of claim 22, wherein the second sending unit sends the PDU session related data according to the PDU session available status, comprising:

when the data related to the PDU session needs to be sent and the available state of the PDU session is available, the second sending unit sends the data related to the PDU session to network equipment; or the like, or, alternatively,

when the PDU session related data needs to be transmitted but the PDU session state is unavailable, the second transmitting unit discards the PDU session related data.

24. Terminal equipment of a management method for DNN correspondence of data network names, the terminal equipment comprising a modem and an application processor, characterized in that the modem comprises:

the second determination unit is used for determining the DNN available state according to first information, wherein the first information comprises one or more of DNN information, local area data network LADN information and terminal equipment position information;

a third sending unit, configured to send data of a protocol data unit PDU session related to the DNN according to the DNN available state; or the like, or, alternatively,

sending the DNN available status to the application processor, the DNN available status being used for the application processor to determine to send data for the DNN related PDU sessions to the modem.

25. The modem of claim 24, wherein the third sending unit sends data of the DNN-related PDU session according to the DNN available status, comprising:

when the data of the PDU session related to the DNN needs to be sent and the available state of the DNN is available, the third sending unit sends the data related to the PDU session to network equipment; alternatively, the first and second electrodes may be,

when the data of the DNN-related PDU session needs to be sent but the DNN available state is unavailable, the third sending unit discards the PDU session-related data.

26. The modem according to claim 24 or 25, wherein the third transmitting unit transmits the PDU session related data to a network device when the data of the DNN related PDU session needs to be transmitted and the DNN available status is available, the modem further comprising:

a third obtaining unit, configured to obtain a rejection message sent by the network device, where the rejection message includes a cause value that a LADN is unavailable;

a second setting unit that sets the DNN available state according to the cause value.

27. A terminal device of a method for managing DNN correspondence of data network names, the terminal device comprising a modem and an application processor, the application processor comprising:

a fourth obtaining unit, configured to obtain the DNN available state sent by the modem;

and the fourth sending unit is used for sending the data related to the PDU session according to the DNN available state.

28. The application processor of claim 27, wherein the fourth sending unit sends data of the DNN-related PDU session according to the DNN available status, the application processor comprising:

when the data of the PDU session related to the DNN needs to be sent and the available state of the DNN is available, the fourth sending unit sends the data related to the PDU session to the network equipment; or the like, or, alternatively,

when the data of the DNN-related PDU session needs to be sent but the DNN available state is unavailable, the fourth sending unit discards the PDU session-related data.

29. A terminal device, comprising:

one or more processors;

one or more memories in which one or more computer programs are stored, the one or more computer programs comprising instructions, which when executed by the one or more processors, cause the terminal device to perform the method of any of claims 1-9.

30. A terminal device, comprising:

one or more processors;

one or more memories in which one or more computer programs are stored, the one or more computer programs comprising instructions, which when executed by the one or more processors, cause the terminal to perform the method of any of claims 10-18.

31. A computer program product comprising instructions for causing a terminal device to perform the method according to any one of claims 1-9 when the computer program product is run on the terminal device.

32. A computer program product comprising instructions for causing a terminal device to perform the method according to any one of claims 10-18 when the computer program product is run on the terminal device.

33. A computer-readable storage medium comprising instructions that, when executed on a terminal device, cause the terminal device to perform the method of any one of claims 1-9.

34. A computer-readable storage medium comprising instructions that, when executed on a terminal device, cause the terminal device to perform the method of any one of claims 10-18.