CN110557750B

CN110557750B - Information transmission method, gateway device, core network device, and storage medium

Info

Publication number: CN110557750B
Application number: CN201810565869.9A
Authority: CN
Inventors: 方海鹏
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-06-04
Filing date: 2018-06-04
Publication date: 2021-08-03
Anticipated expiration: 2038-06-04
Also published as: CN110557750A; WO2019233272A1

Abstract

An embodiment of the present application provides an information transmission method, a gateway device, a core network device, and a storage medium, where the method includes: the first core network equipment receives a request message from the sending equipment; wherein, the request message carries the target user identification; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier. Further, the first core network device obtains the information of the target slice according to the target user identifier, and sends the information of the target slice to the sending device, so that the sending device can obtain the address information of the NF in the target slice. Therefore, the address information of the NF in the target slice corresponding to the target user can be determined under the multi-network slice scene.

Description

Information transmission method, gateway device, core network device, and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information transmission method, a gateway device, a core network device, and a storage medium.

Background

With the development of diversified services, different services have different requirements on network speed, network performance, network security, network reliability, network delay and the like. For these differentiated requirements, in the research of fifth Generation mobile communication technology, the industry recognizes that the "network slicing" technology can realize the capability of flexibly building networks with different features based on the network scenario and requirements of the fifth Generation mobile communication technology (5th-Generation, 5G).

In the related art (for example, in a non-5G single-Network slicing scenario), at least one user identifier and Network Function (NF) address information corresponding to each user identifier are preconfigured on the gateway device, so that when the gateway device receives a service request which is sent by a third-party application and carries a target user identifier, the NF address information corresponding to the target user identifier can be determined according to the preconfigured at least one user identifier and the NF address information corresponding to each user identifier, and then a corresponding service is executed.

However, the related art is not suitable for a multi-network slice scenario, and therefore, how to determine address information of NF in a target slice corresponding to a target user in the multi-network slice scenario is a technical problem to be solved urgently.

Disclosure of Invention

The embodiment of the application provides an information transmission method, gateway equipment, core network equipment and a storage medium, and the purpose of determining address information of NF in a target slice corresponding to a target user in a multi-network slice scene is achieved.

In a first aspect, an embodiment of the present application provides an information transmission method, including:

the first core network equipment receives a request message from the sending equipment; wherein, the request message carries the target user identification; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier;

the first core network equipment acquires the information of the target slice according to the target user identification;

the first core network device sends a response message to the sending device; wherein, the response message carries the information of the target slice.

In the information transmission method provided in the first aspect, the first core network device obtains, according to the target user identifier carried in the request message, information of a target slice corresponding to the target user identifier, and sends the information of the target slice to the sending device, so that the sending device can obtain address information of the NF in the target slice. Therefore, the address information of the NF in the target slice corresponding to the target user can be determined under the multi-network slice scene.

In one possible implementation, the information of the target slice includes at least one of: characteristic information of the target slice and address information of a network function NF in the target slice.

In a possible implementation manner, if the information of the target slice includes feature information of the target slice, the obtaining, by the first core network device, the information of the target slice according to the target user identifier includes:

and the first core network equipment determines the characteristic information of the target slice corresponding to the target user identification according to the target user identification and the mapping information between the user identification and the slice characteristic information.

In a possible implementation manner, if the information of the target slice includes address information of NF in the target slice, the obtaining, by the first core network device, the information of the target slice according to the target user identifier includes:

the first core network equipment determines the characteristic information of the target slice corresponding to the target user identification according to the target user identification and the mapping information between the user identification and the slice characteristic information;

and the first core network equipment acquires the information of the target slice according to the characteristic information of the target slice.

In a possible implementation manner, the acquiring, by the first core network device, the information of the target slice according to the feature information of the target slice includes:

the first core network equipment determines second core network equipment corresponding to the target user identification according to the characteristic information of the target slice;

and the first core network equipment acquires the address information of the NF in the target slice from the second core network equipment according to the characteristic information of the target slice.

and the first core network equipment determines the address information of the NF in the target slice according to the characteristic information of the target slice and the mapping information between the slice characteristic information and the NF address information.

In one possible implementation, the method further includes:

and the first core network equipment acquires the address information of the NF in the target slice from the third core network equipment according to the characteristic information of the target slice.

In one possible implementation, the method further includes:

the first core network device receives slice feature information corresponding to at least one user identifier sent by a fourth core network device.

the first core network equipment acquires the characteristic information of the target slice from fifth core network equipment according to the target user identification;

the first core network device determines a sixth core network device corresponding to the target user identifier according to the characteristic information of the target slice;

and the first core network equipment acquires the address information of the NF in the target slice from the sixth core network equipment according to the characteristic information of the target slice.

In a second aspect, an embodiment of the present application provides an information transmission method, including:

the gateway equipment sends a request message to the first core network equipment; wherein, the request message carries the target user identification; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier;

the gateway device receiving a response message from the first core network device; wherein, the response message carries the information of the target slice;

and the gateway equipment sends a service request to a network function NF in the target slice according to the information of the target slice.

In the information transmission method provided in the second aspect, the gateway device obtains information of the target slice from the first core network device, and sends a service request to the network function NF in the target slice according to the obtained information of the target slice. Therefore, the gateway equipment can determine the address information of NF in the target slice corresponding to the target user in the multi-network slice scene.

In a possible implementation manner, if the information of the target slice includes feature information of the target slice, the gateway device sends a service request to a network function NF in the target slice according to the information of the target slice, including:

the gateway equipment acquires the address information of NF in the target slice according to the characteristic information of the target slice;

and the gateway equipment sends a service request to the NF according to the address information of the NF.

In a possible implementation manner, the acquiring, by the gateway device, address information of the NF in the target slice according to the feature information of the target slice includes:

the gateway device determines a second core network device corresponding to the target user identifier according to the characteristic information of the target slice;

and the gateway equipment acquires the address information of the NF in the target slice from the second core network equipment according to the characteristic information of the target slice.

and the gateway equipment acquires the address information of the NF in the target slice from the slice manager according to the characteristic information of the target slice.

and the gateway equipment determines the address information of the NF in the target slice according to the characteristic information of the target slice and the mapping information between the slice characteristic information and the NF address information.

In one possible implementation, the method further includes:

the gateway device receives at least one piece of slice characteristic information sent by the slice manager and NF address information corresponding to each piece of slice characteristic information.

In a possible implementation manner, if the information of the target slice includes address information of an NF in the target slice, the gateway device sends a service request to a network function NF in the target slice according to the information of the target slice, including:

the gateway equipment sends a service request to the NF according to the address information of the NF;

and the address information of the NF in the target slice is acquired by the first core network device according to the characteristic information of the target slice after acquiring the characteristic information of the target slice according to the target user identifier.

In a possible implementation manner, the address information of the NF in the target slice is acquired from the third core network device according to the feature information of the target slice after the first core network device acquires the feature information of the target slice according to the target user identifier.

In a possible implementation manner, the address information of the NF in the target slice is determined by the first core network device according to the feature information of the target slice and mapping information between the slice feature information and the NF address information after the feature information of the target slice is obtained according to the target user identifier.

In a third aspect, an embodiment of the present application provides an information transmission method, including:

the first core network equipment receives a request message from the sending equipment; wherein, the request message carries the characteristic information of the target slice; the request message is used for indicating to request the first core network device for address information of the network function NF in the target slice;

the first core network equipment determines the address information of NF in the target slice according to the characteristic information of the target slice and the mapping information between the slice characteristic information and the NF address information;

the first core network device sends a response message to the sending device; wherein, the response message carries the address information of the NF in the target slice.

In the information transmission method provided in the third aspect, the address information of the NF in the target slice is determined by the first core network device according to the mapping information between the slice characteristic information and the NF address information and the characteristic information of the target slice carried in the request message, and the address information of the NF in the target slice is sent to the sending device, so that the sending device can obtain the address information of the NF in the target slice. Therefore, the address information of the NF in the target slice corresponding to the target user can be determined under the multi-network slice scene.

In one possible implementation, the characteristic information of the target slice includes at least one of: identification information of the target slice, identification information of a public-NF repository function NRF, and identification information of a private-NRF.

In a fourth aspect, an embodiment of the present application provides a core network device, where the core network device is a first core network device, and the first core network device includes:

a first receiving module, configured to receive a request message from a sending device; wherein, the request message carries the target user identification; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier;

the first acquisition module is used for acquiring the information of the target slice according to the target user identification;

a sending module, configured to send a response message to the sending device; wherein, the response message carries the information of the target slice.

In a possible implementation manner, if the information of the target slice includes feature information of the target slice, the first obtaining module is specifically configured to:

and determining the characteristic information of the target slice corresponding to the target user identification according to the target user identification and the mapping information between the user identification and the slice characteristic information.

In a possible implementation manner, if the information of the target slice includes address information of NFs in the target slice, the first obtaining module includes:

the determining unit is used for determining the characteristic information of the target slice corresponding to the target user identification according to the target user identification and the mapping information between the user identification and the slice characteristic information;

and the first acquisition unit is used for acquiring the information of the target slice according to the characteristic information of the target slice.

In a possible implementation manner, the first obtaining unit is specifically configured to:

determining second core network equipment corresponding to the target user identification according to the characteristic information of the target slice;

and acquiring address information of NF in the target slice from the second core network equipment according to the characteristic information of the target slice.

and determining the address information of the NF in the target slice according to the characteristic information of the target slice and the mapping information between the slice characteristic information and the NF address information.

In a possible implementation manner, the first core network device further includes:

and the second obtaining module is used for obtaining the address information of the NF in the target slice from the third core network equipment according to the characteristic information of the target slice.

and the second receiving module is configured to receive slice feature information corresponding to at least one user identifier sent by the fourth core network device.

a second obtaining unit, configured to obtain feature information of the target slice from a fifth core network device according to the target user identifier;

and a third acquisition unit which acquires information of the target slice according to the characteristic information of the target slice.

In a possible implementation manner, the third obtaining unit is specifically configured to:

determining a sixth core network device corresponding to the target user identifier according to the characteristic information of the target slice;

and acquiring address information of the NF in the target slice from the sixth core network equipment according to the characteristic information of the target slice.

The beneficial effects of the first core network device provided in the implementation manner of the fourth aspect may refer to the beneficial effects brought by the implementation manner of the first aspect, and are not described herein again.

In a fifth aspect, an embodiment of the present application provides a gateway device, including:

a first sending module, configured to send a request message to a first core network device; wherein, the request message carries the target user identification; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier;

a first receiving module, configured to receive a response message from the first core network device; wherein, the response message carries the information of the target slice;

and the second sending module is used for sending the service request to the network function NF in the target slice according to the information of the target slice.

In a possible implementation manner, if the information of the target slice includes feature information of the target slice, the second sending module includes:

the acquisition unit is used for acquiring the address information of the NF in the target slice according to the characteristic information of the target slice;

and the sending unit is used for sending the service request to the NF according to the address information of the NF.

In a possible implementation manner, the obtaining unit is specifically configured to:

and acquiring the address information of the NF in the target slice from the slice manager according to the characteristic information of the target slice.

In one possible implementation, the gateway device further includes:

and the second receiving module is used for receiving at least one piece of slice characteristic information sent by the slice manager and NF address information corresponding to each piece of slice characteristic information.

In a possible implementation manner, if the information of the target slice includes address information of an NF in the target slice, the second sending module is specifically configured to:

sending a service request to the NF according to the address information of the NF;

The beneficial effects of the gateway device provided by the implementation manner of the fifth aspect may refer to the beneficial effects brought by the implementation manner of the second aspect, and are not described herein again.

In a sixth aspect, an embodiment of the present application provides a core network device, where the core network device is a first core network device, and the first core network device includes:

a receiving module for receiving a request message from a transmitting device; wherein, the request message carries the characteristic information of the target slice; the request message is used for indicating to request the first core network device for address information of the network function NF in the target slice;

the determining module is used for determining the address information of the NF in the target slice according to the characteristic information of the target slice and the mapping information between the slice characteristic information and the NF address information;

a sending module, configured to send a response message to the sending device; wherein, the response message carries the address information of the NF in the target slice.

The beneficial effects of the first core network device provided in the implementation manner of the sixth aspect may refer to the beneficial effects brought by the implementation manner of the third aspect, and are not described herein again.

In a seventh aspect, an embodiment of the present application provides a core network device, where the core network device is a first core network device, and the first core network device includes: a processor and a memory;

wherein the memory is used for storing program instructions;

the processor is configured to call and execute the program instructions stored in the memory, and when the processor executes the program instructions stored in the memory, the first core network device is configured to execute the method according to any implementation manner of the first aspect.

In an eighth aspect, an embodiment of the present application provides a gateway device, including: a processor and a memory;

wherein the memory is used for storing program instructions;

the processor is configured to call and execute the program instructions stored in the memory, and when the processor executes the program instructions stored in the memory, the gateway device is configured to perform the method according to any implementation manner of the second aspect.

In a ninth aspect, an embodiment of the present application provides a core network device, where the core network device is a first core network device, and the first core network device includes: a processor and a memory;

wherein the memory is used for storing program instructions;

the processor is configured to call and execute the program instructions stored in the memory, and when the processor executes the program instructions stored in the memory, the first core network device is configured to perform the method according to any implementation manner of the third aspect.

In a tenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method according to any implementation manner of the first aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In an eleventh aspect, an embodiment of the present application provides a program, which when executed by a processor is configured to perform the method according to any implementation manner of the first aspect.

In a twelfth aspect, embodiments of the present application provide a computer program product containing instructions that, when run on a computer, cause the computer to perform the method of any implementation of the first aspect described above.

In a thirteenth aspect, an embodiment of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the instructions cause the computer to perform the method according to any implementation manner of the first aspect.

In a fourteenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method according to any implementation manner of the second aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a fifteenth aspect, an embodiment of the present application provides a program, which when executed by a processor is configured to perform the method of any implementation manner of the second aspect.

In a sixteenth aspect, embodiments of the present application provide a computer program product comprising instructions that, when run on a computer, cause the computer to perform the method of any implementation of the second aspect described above.

In a seventeenth aspect, an embodiment of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the instructions cause the computer to perform the method according to any implementation manner of the second aspect.

In an eighteenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method according to any implementation manner of the third aspect. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

In a nineteenth aspect, the present application provides a program, which when executed by a processor is configured to perform the method of any implementation manner of the third aspect.

In a twentieth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any implementation of the third aspect described above.

In a twenty-first aspect, an embodiment of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the instructions cause the computer to perform the method according to any implementation manner of the third aspect.

Drawings

Fig. 1A is a schematic view of an application scenario provided in an embodiment of the present application;

fig. 1B is a schematic deployment flow diagram of a slice manager provided in an embodiment of the present application;

fig. 1C is a schematic diagram of a terminal registration process provided in an embodiment of the present application;

fig. 2 is a schematic flowchart of an information transmission method according to an embodiment of the present application;

fig. 3 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 4 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 5 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 6 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 7 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 8 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 9 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 10 is a flowchart illustrating an information transmission method according to another embodiment of the present application;

fig. 11 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 12 is a schematic flowchart of an information transmission method according to another embodiment of the present application;

fig. 13 is a schematic diagram of a terminal registration process involved in another embodiment of the present application;

fig. 14 is a schematic structural diagram of a core network device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a core network device according to another embodiment of the present application;

fig. 16 is a schematic structural diagram of a gateway device according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a gateway device according to another embodiment of the present application;

fig. 18 is a schematic structural diagram of a core network device according to another embodiment of the present application.

Detailed Description

First, a part of words and application scenarios related to the embodiments of the present application will be explained.

Network slices (or simply slices) referred to in the embodiments of the present application refer to sets of NFs and combinations of resources required to satisfy a certain class of users or a certain business service, where a network slice is a complete logical network (e.g., may include, but is not limited to, portions of access network devices and/or core network devices). Illustratively, each network slice may provide a different NF (or NF instance), and/or a different traffic performance indicator.

The core network device involved in the embodiments of the present application may include, but is not limited to, at least one of the following NFs: a Unified Data Management Function (UDM), an NF Repository Function (NRF), a Network Slice Selection Function (NSSF), an Access and Mobility Management Function (AMF), a Session Management Function (SMF), a User Plane Function (UPF), and a Policy Control Function (PCF).

The UDM involved in the embodiments of the present application is used to store relevant information of a user (e.g., a user identifier, subscription data of the user, etc.).

The NRF related in the embodiment of the present application is used to support a service discovery function and maintain NF configuration (profile) information. Illustratively, the service discovery function includes: a service discovery request sent by a NF (or referred to as NF instance) is received, and NF configuration information required by the NF is returned to the NF. Illustratively, the NRF in the embodiment of the present application may include: a Common (C) -NRF shared by multiple network slices and/or a proprietary (S) -NRF proprietary within a network slice.

The NF configuration information related in the embodiment of the present application may include, but is not limited to, at least one of the following: NF Instance identification (NFI ID), NF type, network slice related identifier, NF capacity information, NF specific service authorization information, name of supported service, identification of stored data/information. For example, the network slice-related identifier may include, but is not limited to: network Slice Selection Assistance Information (NSSAI), and/or a Network Slice Instance (NSI) ID.

The NSSF referred to in the embodiments of the present application is used to assist in selecting a network slice instance serving a terminal.

The AMF related in the embodiment of the application is used for access and mobility management of the terminal; such as registration management, connection management, reachability management, and/or mobility management, etc.

The information of the target slice referred to in the embodiments of the present application may include, but is not limited to: characteristic information of the target slice and/or address information of a network function NF in the target slice.

The characteristic information of the target slice involved in the embodiment of the present application may include, but is not limited to, at least one of the following: identification information of the target slice (or referred to as target slice instance) (e.g., target network slice instance NSI ID), identification information of C-NRF (e.g., address information of C-NRF), and identification information of S-NRF (e.g., address information of S-NRF).

For example, if the target slice does not contain S-NRF, the feature information of the target slice may include: identification information of the target slice and identification information of the C-NRF (if all network slices share one C-NRF and the target slice does not contain S-NRF, the characteristic information of the target slice may not include the identification information of the C-NRF). For another example, if the target slice includes S-NRF, the feature information of the target slice may include: identification information of the target slice and/or identification information of the S-NRF.

The target user identifier involved in the embodiment of the present application may include, but is not limited to, at least one of the following: a Mobile Subscriber Number (MSISDN), an International Mobile Subscriber Identity Number (IMSI), and an International Mobile Equipment Identity (IMEI).

The mapping information between the user identifier and the slice feature information according to the embodiment of the present application may include: mapping relation between the target user identification and the characteristic information of the target slice; of course, the mapping information between the user identifier and the slice feature information may further include: the mapping relationship between other user identifiers and corresponding slice feature information is not limited in the embodiment of the present application.

For example, mapping information between the user identifier and the slice feature information may be preset in the first core network device or the gateway device, or mapping information between the user identifier and the slice feature information may be acquired; of course, mapping information between the user identifier and the slice feature information may also be obtained in other ways, which is not limited in the embodiment of the present application.

The mapping information between the slice feature information and the NF address information related in the embodiment of the present application may include: mapping relation between the characteristic information of the target slice and the address information of NF in the target slice; of course, the mapping information between the slice feature information and the NF address information may further include: the mapping relationship between other slice feature information and the NF address information corresponding to the slice feature information is not limited in this embodiment of the present application.

For example, mapping information between the slice feature information and NF address information may be preset in the first core network device, the second core network device, the slice manager, and/or the gateway device, or mapping information between the slice feature information and the NF address information may be acquired; of course, the mapping information between the slice feature information and the NF address information may also be obtained by other ways, which is not limited in the embodiment of the present application.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

Fig. 1A is a schematic view of an application scenario provided in the embodiment of the present application. As shown in fig. 1A, when a third-party Application (Application) receives a service request sent by a target user, the third-party Application may initiate the service request to an NF (e.g., UDM, NRF, AMF, SMF, UPF, PCF, etc.) in a network slice corresponding to the target user through a gateway device. In the embodiment of the application, a specific process of determining NF in a network slice corresponding to a target user by a gateway device is mainly described; of course, the embodiment of the present application may also be applied to other application scenarios, and the embodiment of the present application is not limited thereto.

Illustratively, the third party Application may communicate with the gateway device through an Application Programming Interface (API); of course, the third-party application may also communicate with the gateway device by other ways, which is not limited in this embodiment of the application.

Fig. 1B is a schematic deployment flow diagram of a slice manager provided in this embodiment of the present application. As shown in fig. 1B, the deployment process of the slice manager provided in the embodiment of the present application may include:

in step S1, the slice manager receives the slice creation request message.

Illustratively, the Slice creation request message may carry a Slice requirement and Single Network Slice Selection Assistance Information (S-NSSAI); of course, the slice creation request message may also carry other information, which is not limited in this embodiment of the present application

Step S2, the slice manager assigns a slice instance identification. Illustratively, each slice instance has an identification (e.g., an NSI ID).

Step S3, the slice manager creates a target slice instance according to the slice creation request message and sends the target NSI ID to the NF within the target slice.

Step S4, the slice manager sends the mapping between the S-NSSAI and the target NSI ID, or the mapping between the target NSI ID and the S-NRF in the target slice to the NSSF.

Step S5 registers the information on the target slice NF with the NRF.

Illustratively, when S-NRF is not contained in the target slice, the NF registers information (e.g., NFI ID and NSI ID, etc.) with C-NRF within the target slice.

For yet another example, when S-NRF is included in the target slice, the NF within the target slice registers information (e.g., NFI ID and NSI ID, etc.) with the S-NRF located within the target slice.

Fig. 1C is a schematic diagram of a terminal registration process provided in an embodiment of the present application. As shown in fig. 1C, the terminal registration procedure provided in this embodiment may include:

step S11, the terminal sends a registration request message 1 to the initial AMF.

Exemplarily, the registration request message 1 may carry a target user identifier and a Requested NSSAI; of course, other information may also be carried, which is not limited in the embodiments of the present application.

Step S12, the initial AMF sends a request message a to the UDM.

Exemplarily, the request message a may carry a target user identifier, and is used to indicate to request the UDM to acquire an S-NSSAI signed by the target user identifier; of course, other information may also be carried, which is not limited in the embodiments of the present application.

Step S13, the UDM returns a response message a to the initial AMF.

Exemplarily, the response message a may carry the S-NSSAI signed by the target user; of course, other information may also be carried, which is not limited in the embodiments of the present application.

Step S14, the initial AMF sends a request message B to the NSSF.

Exemplarily, the request message B is used to indicate that the NSSF is requested to acquire target AMF information that the target user can access, and the request message B may carry the requested NSSAI and the subscribed S-NSSAI; of course, other information may also be carried, which is not limited in the embodiments of the present application.

Step S15, the NSSF sends a response message B to the initial AMF.

Illustratively, the response message B may carry feature information of a target slice that the target user may access and NSSAI allowed to access. For example, the characteristic information of the target slice may include, but is not limited to, at least one of: the identification information of the target NSI ID, S-NRF and C-NRF; of course, other information may also be carried, which is not limited in the embodiments of the present application.

Step S16, the initial AMF determines the target AMF according to the NSSAI allowed to access, and sends a registration request message 2 to the target AMF.

Exemplarily, the registration request message 2 may carry feature information of the target slice; of course, other information may also be carried, which is not limited in the embodiments of the present application.

Step S17, the target AMF sends the feature information of the target slice to the UDM.

And step S18, the UDM stores the mapping relation between the characteristic information of the target slice and the target user identification.

Step S19, the UDM returns an acknowledgement message to the target AMF.

Step S20, the target AMF sends a registration success response message to the terminal.

The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 2 is a flowchart illustrating an information transmission method according to an embodiment of the present application. In the embodiment of the present application, a first core network device side is taken as an example to describe an information transmission method provided in the embodiment of the present application. As shown in fig. 2, the method of the embodiment of the present application may include:

step S201, the first core network device receives a request message from the sending device.

Step S202, the first core network device obtains information of the target slice according to the target user identification.

Step S203, the first core network device sends a response message to the sending device.

In this embodiment, the first core network device may be the above UDM or the above C-NRF, for example. In the following embodiments of the present application, an information transmission method provided in the embodiments of the present application is described with reference to an example in which a first core network device is a UDM or a C-NRF:

1) one possible implementation: if the first core network device is a UDM, in step S201, the first core network device receives a request message from a sending device (e.g., a gateway device or a C-NRF); wherein, the request message carries the target user identifier (of course, other information may also be carried, which is not limited in this embodiment of the application); the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier.

Further, in step S202, the first core network device obtains information of the target slice according to the target user identifier. Illustratively, the information of the target slice may include, but is not limited to: characteristic information of the target slice and/or address information of NF in the target slice.

For example, in step S202, if the information of the target slice includes feature information of the target slice, the first core network device determines, according to the target user identifier and mapping information between the user identifier and the slice feature information, feature information of the target slice corresponding to the target user identifier. Further, in step S203, the first core network device sends a response message to the sending device (where the response message may carry the feature information of the target slice), so that the sending device obtains the address information of the NF in the target slice according to the feature information of the target slice. It should be noted that the response message may also carry other information, which is not limited in this embodiment of the application.

For example, in step S202, if the information of the target slice includes address information of NF in the target slice, the first core network device determines, according to the target user identifier and mapping information between the user identifier and slice feature information, feature information of the target slice corresponding to the target user identifier, and acquires information of the target slice (i.e., address information of NF in the target slice) according to the feature information of the target slice. Further, in step S203, the first core network device sends a response message to the sending device (where the response message may carry address information of the NF in the target slice). It should be noted that the response message may also carry other information, which is not limited in this embodiment of the application.

The following embodiments of the present application describe an implementation manner of "the first core network device obtains information of a target slice according to feature information of the target slice":

illustratively, the first core network device determines, according to the feature information of the target slice, a second core network device corresponding to the target user identifier, and acquires, from the second core network device, address information of the NF in the target slice according to the feature information of the target slice.

In the embodiment of the application, the first core network device determines the second core network device corresponding to the target user identifier according to the feature information of the target slice (for example, at least one of the following items: the identification information of the target slice, the identification information of the C-NRF and the identification information of the S-NRF). For example, if the feature information of the target slice includes: and determining that the second core network device is C-NRF according to the identification information of the target slice. For another example, if the feature information of the target slice includes: and the identification information of the target slice and the identification information of the C-NRF determine that the second core network device is the C-NRF. For another example, if the feature information of the target slice includes: and the identification information of the S-NRF determines that the second core network equipment is the S-NRF.

Further, the first core network device obtains address information of the NF in the target slice from the second core network device according to the feature information of the target slice. For example, a first core network device sends a request message 1 (carrying feature information of a target slice) to a second core network device, where the request message 1 is used to indicate that address information of NF in the target slice is requested from the second core network device, so that the second core network device determines address information of NF in the target slice according to the feature information of the target slice and mapping information between the slice feature information and the NF address information; further, the first core network device receives a response message 1 (carrying address information of NF in the target slice) from the second core network device.

Of course; the first core network device may also obtain address information of the NF in the target slice from the second core network device in other manners according to the feature information of the target slice, which is not limited in this embodiment of the application.

Illustratively, the first core network device determines address information of the NF in the target slice according to the feature information of the target slice and mapping information between the slice feature information and the NF address information.

Considering that the first core network device needs to store the feature information of the target slice and the address information of the NF in the target slice corresponding to the feature information in advance, for example, before determining the address information of the NF in the target slice according to the feature information of the target slice and the mapping information between the slice feature information and the address information of the NF, the first core network device may obtain the address information of the NF in the target slice from a third core network device (e.g., C-NRF or S-NRF) according to the feature information of the target slice, so as to store the mapping relationship between the feature information of the target slice and the address information of the NF in the target slice. Specifically, the manner in which the first core network device determines the third core network device may refer to the manner in which the first core network device determines the second core network device, which is not described herein again.

Of course, the first core network device may also obtain address information of the NF in the target slice in other manners according to the feature information of the target slice, which is not limited in this embodiment of the application.

Considering that the first core network device needs to store the target user identifier and the feature information of the target slice corresponding to the target user identifier in advance, for example, before obtaining the information of the target slice according to the target user identifier, the first core network device may receive slice feature information (for example, including the feature information of the target slice corresponding to the target user identifier) corresponding to at least one user identifier sent by a fourth core network device (for example, a target AMF), so that the first core network device stores the mapping relationship between the target user identifier and the feature information of the target slice.

2) Another possible implementation: if the first core network device is a C-NRF, in step S201, the first core network device receives a request message from a sending device (e.g., a gateway device); wherein, the request message carries the target user identifier (of course, other information may also be carried, which is not limited in this embodiment of the application); the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier.

Further, in step S202, the first core network device obtains information of the target slice according to the target user identifier.

For example, in step S202, if the information of the target slice includes address information of the NF in the target slice, the first core network device acquires feature information of the target slice from a fifth core network device (e.g., UDM) according to the target user identifier (e.g., a mapping relationship between the target user identifier and the feature information of the target slice is stored in the fifth core network device), and acquires information of the target slice (i.e., address information of the NF in the target slice) according to the feature information of the target slice. Further, in step S203, the first core network device sends a response message to the sending device (where the response message may carry address information of the NF in the target slice). It should be noted that the response message may also carry other information, which is not limited in this embodiment of the application.

Illustratively, the first core network device determines a sixth core network device (e.g., S-NRF) corresponding to the target user identifier according to the feature information of the target slice, and acquires address information of the NF in the target slice from the sixth core network device according to the feature information of the target slice.

In the embodiment of the application, the first core network device determines, according to feature information of a target slice (for example, including at least one of identification information of the target slice and identification information of an S-NRF), a sixth core network device corresponding to a target user identifier. Specifically, the manner in which the first core network device determines the sixth core network device may refer to the manner in which the first core network device determines the second core network device, which is not described herein again.

Further, the first core network device obtains address information of the NF in the target slice from the sixth core network device according to the feature information of the target slice. Specifically, the manner in which the first core network device obtains the address information of the NF in the target slice from the sixth core network device may refer to the manner in which the first core network device obtains the address information of the NF in the target slice from the second core network device, which is not described herein again.

Of course, the first core network device may also obtain the information of the target slice in other manners according to the feature information of the target slice, which is not limited in this embodiment of the application.

In the embodiment of the application, the first core network device acquires the information of the target slice corresponding to the target user identifier according to the target user identifier carried in the request message, and sends the information of the target slice to the sending device, so that the sending device can acquire the address information of the NF in the target slice. Therefore, the address information of the NF in the target slice corresponding to the target user can be determined under the multi-network slice scene.

Fig. 3 is a flowchart illustrating an information transmission method according to another embodiment of the present application. In the embodiment of the present application, a gateway device side is taken as an example to describe the information transmission method provided in the embodiment of the present application. As shown in fig. 3, the method of the embodiment of the present application may include:

step S301, the gateway device sends a request message to the first core network device.

In this step, the gateway device sends a request message to a first core network device (e.g., UDM or C-NRF); wherein, the request message may carry the target user identifier (of course, other information may also be carried, which is not limited in this embodiment of the application); the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier, so that the first core network device can obtain the information of the target slice according to the target user identifier.

Step S302, the gateway device receives a response message from the first core network device.

Illustratively, the response message may carry information of the target slice. It should be noted that the response message may also carry other information, which is not limited in this embodiment of the application.

Step S303, the gateway equipment sends a service request to a network function NF in the target slice according to the information of the target slice.

In the present embodiment, the information of the target slice may include, but is not limited to: characteristic information of the target slice and/or address information of NF in the target slice. In the following embodiments of the present application, an information transmission method provided in the embodiments of the present application is described with respect to a difference in information of a target slice:

1) one possible implementation: and if the information of the target slice comprises the characteristic information of the target slice, the gateway equipment acquires the address information of the NF in the target slice according to the characteristic information of the target slice and sends a service request to the NF according to the address information of the NF. Illustratively, the feature information of the target slice may be determined by the first core network device (e.g., UDM) according to the target user identifier and mapping information between the user identifier and the slice feature information, or may be obtained by the first core network device from other core network devices according to the target user identifier; of course, the feature information of the target slice may also be determined by the first core network device in other manners, which is not limited in this embodiment of the application.

The following embodiments of the present application introduce an implementation manner of "a gateway device obtains address information of an NF in a target slice according to feature information of the target slice":

illustratively, the gateway device determines, according to the feature information of the target slice, a second core network device corresponding to the target user identifier, and acquires, from the second core network device, address information of the NF in the target slice according to the feature information of the target slice.

In the embodiment of the application, the gateway device determines the second core network device corresponding to the target user identifier according to the feature information of the target slice (for example, including at least one of the identification information of the target slice, the identification information of the C-NRF, and the identification information of the S-NRF). Specifically, the manner in which the gateway device determines the second core network device may refer to the manner in which the first core network device determines the second core network device, which is not described herein again.

Further, the gateway device obtains address information of the NF in the target slice from the second core network device according to the feature information of the target slice. Specifically, the way in which the gateway device obtains the address information of the NF in the target slice from the second core network device may refer to the way in which the first core network device obtains the address information of the NF in the target slice from the second core network device, which is not described herein again.

Illustratively, the gateway device acquires address information of NFs in the target slice from the slice manager according to the feature information of the target slice. For example, the gateway device sends a request message 2 (carrying feature information of a target slice) to the slice manager, where the request message 2 is used to indicate that address information of NF in the target slice is requested from the slice manager, so that the slice manager determines address information of NF in the target slice according to the feature information of the target slice and mapping information between the slice feature information and the NF address information; further, the gateway device receives a response message 2 (carrying address information of NF in the target slice) from the slice manager.

Illustratively, the gateway device determines address information of the NF in the target slice according to the feature information of the target slice and mapping information between the slice feature information and the NF address information.

Considering that the gateway device needs to store the feature information of the target slice and the address information of the NF in the target slice corresponding to the feature information in advance, for example, before determining the address information of the NF in the target slice according to the feature information of the target slice and the mapping information between the slice feature information and the address information of the NF, the gateway device may receive at least one slice feature information sent by the slice manager and the address information of the NF corresponding to each slice feature information (for example, including the feature information of the target slice and the address information of the NF in the target slice), so that the gateway device may store the mapping relationship between the target user identifier and the feature information of the target slice.

Of course, the gateway device may also obtain address information of the NF in the target slice in other manners according to the feature information of the target slice, which is not limited in this embodiment.

2) Another possible implementation: if the information of the target slice comprises address information of NF in the target slice, the gateway equipment sends a service request to the NF according to the address information of the NF; the address information of the NF in the target slice is acquired by the first core network device (e.g., UDM or C-NRF) according to the feature information of the target slice after acquiring the feature information of the target slice according to the target user identifier.

Illustratively, the feature information of the target slice may be determined by the first core network device according to the target user identifier and mapping information between the user identifier and the slice feature information, or may be obtained by the first core network device from other core network devices according to the target user identifier; of course, the feature information of the target slice may also be determined by the first core network device in other manners, which is not limited in this embodiment of the application.

In another example, the address information of the NF in the target slice is obtained from the third core network device according to the feature information of the target slice after the first core network device obtains the feature information of the target slice according to the target user identifier.

For example, after the first core network device obtains the feature information of the target slice according to the target user identifier, the third core network device (e.g., S-NRF or S-NRF) corresponding to the target user identifier is determined according to the feature information of the target slice, and the address information of the NF in the target slice is obtained from the third core network device according to the feature information of the target slice. Specifically, the manner in which the first core network device determines the third core network device may refer to the manner in which the first core network device determines the second core network device, which is not described herein again; and/or, the manner in which the first core network device obtains the address information of the NF in the target slice from the third core network device may refer to the manner in which the first core network device obtains the address information of the NF in the target slice from the second core network device, which is not described herein again.

In another example, the address information of the NF in the target slice is determined by the first core network device according to the feature information of the target slice and the mapping information between the slice feature information and the address information of the NF after the feature information of the target slice is obtained according to the target user identifier.

In the embodiment of the application, the gateway device acquires the information of the target slice from the first core network device, and sends a service request to the network function NF in the target slice according to the acquired information of the target slice. Therefore, the gateway equipment can determine the address information of NF in the target slice corresponding to the target user in the multi-network slice scene.

Fig. 4 is a flowchart illustrating an information transmission method according to another embodiment of the present application. In this embodiment, a first core network device is taken as an NRF as an example, and the information transmission method provided in this embodiment is described. As shown in fig. 4, the method of the embodiment of the present application may include:

step S401, the first core network device receives a request message from the sending device.

In this step, the first core network device receives a request message from a sending device (e.g., a gateway device or UDM); wherein, the request message may carry feature information of the target slice (of course, may also carry other information, which is not limited in this embodiment of the application); the request message is used to indicate that address information of the network function NF in the target slice is requested from the first core network device.

Illustratively, the characteristic information of the target slice may include, but is not limited to, at least one of: identification information of the target slice, identification information of C-NRF, and identification information of S-NRF.

Step S402, the first core network device determines the address information of the NF in the target slice according to the feature information of the target slice and the mapping information between the slice feature information and the NF address information.

Step S403, the first core network device sends a response message to the sending device.

Illustratively, the response message may carry address information of NFs in the target slice. It should be noted that the response message may also carry other information, which is not limited in this embodiment of the application.

In the embodiment of the application, the first core network device determines the address information of the NF in the target slice according to the mapping information between the slice feature information and the NF address information and the feature information of the target slice carried in the request message, and sends the address information of the NF in the target slice to the sending device, so that the sending device can conveniently obtain the address information of the NF in the target slice. Therefore, the address information of the NF in the target slice corresponding to the target user can be determined under the multi-network slice scene.

Fig. 5 is a flowchart illustrating an information transmission method according to another embodiment of the present application. On the basis of the foregoing embodiments, in the embodiments of the present application, the information transmission method provided in the embodiments of the present application is described by taking a gateway device, a UDM, an NRF, and an NF in a target slice as examples. As shown in fig. 5, the method of the embodiment of the present application may include:

step S501, the gateway device sends a request message 3a to the UDM.

Exemplarily, the request message 3a may carry a target user identifier; the request message 3a is used to indicate a request for information of a target slice to which a target user identification corresponds to the UDM. It should be noted that the request message 3a may also carry other information, which is not limited in the embodiment of the present application.

Step S502, the UDM determines the characteristic information of the target slice according to the target user identification and the mapping information between the user identification and the slice characteristic information.

Step S503, the UDM determines NRF according to the feature information of the target slice, and sends a request message 3b to the NRF.

For example, if the feature information of the target slice includes: and determining that the NRF is C-NRF according to the identification information of the target slice. For another example, if the feature information of the target slice includes: and the identification information of the target slice and the identification information of the C-NRF, determining that the NRF is the C-NRF. For another example, if the feature information of the target slice includes: and the identification information of the S-NRF determines that the NRF is the S-NRF.

Exemplarily, the request message 3b may carry characteristic information of the target slice; the request message 3b is used to indicate that address information of NF in the target slice is requested to the NRF. It should be noted that the request message 3b may also carry other information, which is not limited in the embodiment of the present application.

Step S504, the NRF determines the address information of the NF in the target slice according to the feature information of the target slice and the mapping information between the slice feature information and the NF address information.

Step S505, the NRF sends a response message 3b to the UDM.

Exemplarily, the response message 3b may carry address information of NFs in the target slice; of course, the response message 3b may also carry other information, which is not limited in this embodiment of the application.

Step S506, the UDM sends a response message 3a to the gateway device.

Exemplarily, the response message 3a may carry address information of NFs in the target slice; of course, the response message 3a may also carry other information, which is not limited in this embodiment of the application.

And step S507, the gateway equipment sends a service request to the NF in the target slice.

Specifically, the way in which the gateway device sends the service request to the NF may refer to the way in which the service request is sent in the related art, which is not limited in this embodiment.

In the embodiment of the application, the information of the target slice is acquired from the UDM through gateway equipment; further, the UDM determines the characteristic information of the target slice according to the target user identifier, and acquires the address information of the NF in the target slice from the NRF according to the characteristic information of the target slice; further, the UDM sends the address information of the NF in the target slice to the gateway device, so that the gateway device sends a service request to the NF in the target slice. Therefore, the gateway equipment can determine the address information of NF in the target slice corresponding to the target user in the multi-network slice scene.

Fig. 6 is a flowchart illustrating an information transmission method according to another embodiment of the present application. On the basis of the foregoing embodiments, in the embodiments of the present application, the information transmission method provided in the embodiments of the present application is described by taking a gateway device, a UDM, an NRF, and an NF in a target slice as examples. As shown in fig. 6, the method of the embodiment of the present application may include:

step S601, the gateway device sends a request message 4a to the UDM.

Exemplarily, the request message 4a may carry a target user identifier; the request message 4a is used to indicate a request for information of a target slice to which a target user identification corresponds to the UDM. It should be noted that the request message 4a may also carry other information, which is not limited in the embodiment of the present application.

Step S602, the UDM determines the characteristic information of the target slice according to the target user identification and the mapping information between the user identification and the slice characteristic information.

Illustratively, the characteristic information of the target slice may include, but is not limited to, at least one of: identification information of the target slice, identification information of C-NRF, and identification information of S-NRF. For example, if the target slice does not contain S-NRF, the feature information of the target slice may include: identification information of the target slice and identification information of the C-NRF (if all network slices share one C-NRF, the characteristic information of the target slice may not include the identification information of the C-NRF). For another example, if the target slice includes S-NRF, the feature information of the target slice may include: identification information of the target slice and/or identification information of the S-NRF.

Step S603, the UDM sends a response message 4a to the gateway device.

Illustratively, the response message 4a may carry characteristic information of the target slice; of course, the response message 4a may also carry other information, which is not limited in this embodiment of the application.

Step S604, the gateway device determines an NRF according to the feature information of the target slice, and sends a request message 4b to the NRF.

Specifically, the gateway device may refer to the manner in which the UDM determines the NRF according to the feature information of the target slice in step S503, which is not described herein again.

Exemplarily, the request message 4b may carry characteristic information of the target slice; the request message 4b is used to indicate that address information of NF in the target slice is requested to the NRF. It should be noted that the request message 4b may also carry other information, which is not limited in the embodiment of the present application.

Step S605, the NRF determines the address information of the NF in the target slice according to the feature information of the target slice and the mapping information between the slice feature information and the NF address information.

Step S606, the NRF sends a response message 4b to the gateway device.

Exemplarily, the response message 4b may carry address information of the NF in the target slice; of course, the response message 4b may also carry other information, which is not limited in this embodiment of the application.

Step S607, the gateway device sends a service request to the NF in the target slice.

In the embodiment of the application, the information of the target slice is acquired from the UDM through gateway equipment; further, the UDM determines the characteristic information of the target slice according to the target user identification and sends the characteristic information to the gateway equipment; further, the gateway device obtains address information of the NF in the target slice from the NRF according to the feature information of the target slice, so that the gateway device sends a service request to the NF in the target slice. Therefore, the gateway equipment can determine the address information of NF in the target slice corresponding to the target user in the multi-network slice scene.

Fig. 7 is a flowchart illustrating an information transmission method according to another embodiment of the present application. On the basis of the foregoing embodiments, in the embodiments of the present application, an information transmission method provided in the embodiments of the present application is described by taking a gateway device, a UDM, a slice manager, and an NF in a target slice as examples. As shown in fig. 7, the method of the embodiment of the present application may include:

step S701, the gateway device sends a request message 5a to the UDM.

Exemplarily, the request message 5a may carry a target user identifier; the request message 5a is used to indicate a request for information of the target slice to which the target user identification corresponds to the UDM. It should be noted that the request message 5a may also carry other information, which is not limited in the embodiment of the present application.

Step S702, the UDM determines the characteristic information of the target slice according to the target user identification and the mapping information between the user identification and the slice characteristic information.

Step S703, the UDM sends a response message 5a to the gateway device.

Illustratively, the response message 5a may carry characteristic information of the target slice; of course, the response message 5a may also carry other information, which is not limited in this embodiment of the application.

Step S704, the gateway device sends a request message 5b to the slice manager.

Exemplarily, the request message 5b may carry characteristic information of the target slice; the request message 5b is used to indicate a request for address information of the NF in the target slice from the slice manager. It should be noted that the request message 5b may also carry other information, which is not limited in the embodiment of the present application.

Step S705, the slice manager determines the address information of the NF in the target slice according to the feature information of the target slice and the mapping information between the slice feature information and the NF address information.

Step S706, the slice manager sends a response message 5b to the gateway device.

Exemplarily, the response message 5b may carry address information of NFs in the target slice; of course, the response message 5b may also carry other information, which is not limited in this embodiment of the application.

And step S707, the gateway equipment sends a service request to the NF in the target slice.

In the embodiment of the application, the information of the target slice is acquired from the UDM through gateway equipment; further, the UDM determines the characteristic information of the target slice according to the target user identification and sends the characteristic information to the gateway equipment; further, the gateway device obtains address information of the NF in the target slice from the slice manager according to the feature information of the target slice, so that the gateway device sends a service request to the NF in the target slice. Therefore, the gateway equipment can determine the address information of NF in the target slice corresponding to the target user in the multi-network slice scene.

Fig. 8 is a flowchart illustrating an information transmission method according to another embodiment of the present application. On the basis of the foregoing embodiments, in the embodiments of the present application, the information transmission method provided in the embodiments of the present application is described by taking a gateway device, a UDM, and an NF in a target slice as examples. As shown in fig. 8, the method of the embodiment of the present application may include:

step S801, the gateway device sends a request message 6a to the UDM.

Exemplarily, the request message 6a may carry a target user identifier; the request message 6a is used to indicate a request for information of the target slice to which the target user identification corresponds to the UDM. It should be noted that the request message 6a may also carry other information, which is not limited in the embodiment of the present application.

And S802, determining the characteristic information of the target slice by the UDM according to the target user identification and the mapping information between the user identification and the slice characteristic information.

Step S803, the UDM sends a response message 6a to the gateway device.

Illustratively, the response message 6a may carry characteristic information of the target slice; of course, the response message 6a may also carry other information, which is not limited in this embodiment of the application.

Step S804, the gateway device determines address information of the NF in the target slice according to the feature information of the target slice and mapping information between the slice feature information and the NF address information.

Illustratively, the gateway device stores in advance feature information of the target slice and address information of NFs in the target slice corresponding to the feature information.

Step S805, the gateway device sends a service request to the NF in the target slice.

Fig. 9 is a flowchart illustrating an information transmission method according to another embodiment of the present application. On the basis of the embodiment shown in fig. 8, in the embodiment of the present application, an implementation manner in which the gateway device stores the feature information of the target slice and the address information of the NF in the target slice corresponding to the feature information in advance is described. As shown in fig. 9, the method of the embodiment of the present application may include:

in step S901, the slice manager receives a slice creation request message.

Illustratively, the slice creation request message may carry a network slice requirement and an S-NSSAI; of course, the slice creation request message may also carry other information, which is not limited in this embodiment of the present application

Step S902, the slice manager creates NF in the target slice according to the slice creation request message.

Step S903, the creation is completed.

Step S904, the slice manager sends the feature information of the target slice and the address information of the NF in the target slice to the gateway device.

Fig. 10 is a flowchart illustrating an information transmission method according to another embodiment of the present application. On the basis of the above embodiments, in the embodiments of the present application, it is assumed that all network slices share one C-NRF and a target network slice does not include S-NRF, and the information transmission method provided in the embodiments of the present application is described with reference to the gateway device, the UDM, the C-NRF, and the NF in the target slice as examples. As shown in fig. 10, the method of the embodiment of the present application may include:

step S1001, the gateway device sends a request message 7a to the C-NRF.

Exemplarily, the request message 7a may carry a target user identifier; the request message 7a is used to indicate that information of the target slice corresponding to the target user identification is requested to the C-NRF. It should be noted that the request message 7a may also carry other information, which is not limited in the embodiment of the present application.

Step S1002, the C-NRF sends a request message 7b to the UDM.

Exemplarily, the request message 7b may carry a target user identifier; the request message 7b is used to indicate a request for information of the target slice to which the target user identification corresponds to the UDM. It should be noted that the request message 7b may also carry other information, which is not limited in the embodiment of the present application.

And step S1003, the UDM determines the characteristic information of the target slice according to the target user identification and the mapping information between the user identification and the slice characteristic information.

Illustratively, the characteristic information of the target slice may include, but is not limited to: identification information of the target slice.

Step S1004, the UDM sends a response message 7b to the C-NRF.

Illustratively, the response message 7b may carry characteristic information of the target slice; of course, the response message 7b may also carry other information, which is not limited in this embodiment of the application.

And S1005, the C-NRF determines the address information of the NF in the target slice according to the characteristic information of the target slice and the mapping information between the slice characteristic information and the NF address information.

Step S1006, the C-NRF sends a response message 7a to the gateway device.

Exemplarily, the response message 7a may carry address information of NFs in the target slice; of course, the response message 7a may also carry other information, which is not limited in this embodiment of the application.

Step S1007, the gateway device sends a service request to the NF in the target slice.

In the embodiment of the application, the information of the target slice is acquired from the C-NRF through the gateway equipment; further, the C-NRF acquires the characteristic information of the target slice from the UDM according to the target user identification, and determines the address information of the NF in the target slice according to the characteristic information of the target slice; further, the C-NRF sends the address information of the NF in the target slice to the gateway device, so that the gateway device sends a service request to the NF in the target slice. Therefore, the gateway equipment can determine the address information of NF in the target slice corresponding to the target user in the multi-network slice scene.

Fig. 11 is a flowchart illustrating an information transmission method according to another embodiment of the present application. On the basis of the above embodiments, in the embodiments of the present application, it is assumed that all network slices share one C-NRF and a target network slice includes an S-NRF, and the information transmission method provided in the embodiments of the present application is described by taking a gateway device, a UDM, a C-NRF, an S-NRF, and NF in the target slice as examples. As shown in fig. 11, the method of the embodiment of the present application may include:

step S1101, the gateway device sends a request message 8a to the C-NRF.

Exemplarily, the request message 8a may carry a target user identifier; the request message 8a is used to indicate that information of the target slice corresponding to the target user identification is requested to the C-NRF. It should be noted that the request message 8a may also carry other information, which is not limited in the embodiment of the present application.

Step S1102, C-NRF sends a request message 8b to the UDM.

Exemplarily, the request message 8b may carry a target user identifier; the request message 8b is used to indicate a request for information of the target slice to which the target user identification corresponds to the UDM. It should be noted that the request message 8b may also carry other information, which is not limited in the embodiment of the present application.

Step S1103, the UDM determines feature information of the target slice according to the target user identifier and mapping information between the user identifier and the slice feature information.

Illustratively, the characteristic information of the target slice may include, but is not limited to: identification information of S-NRF.

Step S1104, the UDM sends a response message 8b to the C-NRF.

Illustratively, the response message 8b may carry characteristic information of the target slice; of course, the response message 8b may also carry other information, which is not limited in this embodiment of the application.

Step S1105, the C-NRF sends a request message 8C to the S-NRF according to the characteristic information of the target slice.

Exemplarily, no information may be carried in the request message 8 c; the request message 8c is for instructing to request the S-NRF for address information of the NF in the target slice. It should be noted that the request message 8c may also carry other information (for example, NF type, and the like, and correspondingly, the request message 8c is used to indicate that address information of an NF corresponding to the NF type in the target slice is requested from the S-NRF), which is not limited in this embodiment of the application.

Step S1106, S-NRF determines the address information of NF in the target slice.

Illustratively, if the request message 8c also carries the NF type, the S-NRF determines the address information of the NF belonging to the NF type in the target slice.

Step S1107, S-NRF sends response message 8C to C-NRF.

For example, the response message 8c may carry address information of NFs in the target slice (e.g., address information of all NFs in the target slice, or address information of NFs belonging to the NF type in the target slice); of course, the response message 8c may also carry other information, which is not limited in this embodiment of the application.

Step S1108, the C-NRF sends a response message 8a to the gateway device.

Exemplarily, the response message 8a may carry address information of NFs in the target slice; of course, the response message 8a may also carry other information, which is not limited in this embodiment of the application.

Step S1109, the gateway device sends a service request to the NF in the target slice.

In the embodiment of the application, the information of the target slice is acquired from the C-NRF through the gateway equipment; further, the C-NRF acquires the characteristic information of the target slice from the UDM according to the target user identification, and acquires the address information of the NF in the target slice from the S-NRF according to the characteristic information of the target slice; further, the C-NRF sends the address information of the NF in the target slice to the gateway device, so that the gateway device sends a service request to the NF in the target slice. Therefore, the gateway equipment can determine the address information of NF in the target slice corresponding to the target user in the multi-network slice scene.

Fig. 12 is a flowchart illustrating an information transmission method according to another embodiment of the present application. On the basis of the foregoing embodiments, in the embodiments of the present application, the information transmission method provided in the embodiments of the present application is described by taking a gateway device, a UDM, and an NF in a target slice as examples. As shown in fig. 12, the method of the embodiment of the present application may include:

step S1201, the gateway device sends a request message 9a to the UDM.

Exemplarily, the request message 9a may carry a target user identifier; the request message 9a is used to indicate a request for information of the target slice to which the target user identification corresponds to the UDM. It should be noted that the request message 9a may also carry other information, which is not limited in the embodiment of the present application.

Step S1202, the UDM determines the characteristic information of the target slice according to the target user identification and the mapping information between the user identification and the slice characteristic information.

Step S1203, the UDM determines address information of the NF in the target slice according to the feature information of the target slice and mapping information between the slice feature information and the NF address information.

Illustratively, the UDM stores in advance feature information of the target slice and address information of the NF in the target slice corresponding thereto.

Step S1204, the UDM sends a response message 9a to the gateway device.

Exemplarily, the response message 9a may carry address information of NFs in the target slice; of course, the response message 9a may also carry other information, which is not limited in this embodiment of the application.

And step S1205, the gateway equipment sends a service request to the NF in the target slice.

In the embodiment of the application, the information of the target slice is acquired from the UDM through gateway equipment; further, the UDM determines the characteristic information of the target slice according to the target user identification, and determines the address information of NF in the target slice according to the characteristic information of the target slice; further, the UDM sends the address information of the NF in the determined target slice to the gateway device, so that the gateway device sends a service request to the NF in the target slice. Therefore, the gateway equipment can determine the address information of NF in the target slice corresponding to the target user in the multi-network slice scene.

Fig. 13 is a schematic diagram of a terminal registration procedure according to another embodiment of the present application. On the basis of the embodiment shown in fig. 12, in the embodiment of the present application, an implementation manner in which the UDM stores the feature information of the target slice and the address information of the NF in the target slice corresponding to the feature information in advance is described. As shown in fig. 13, the method of the embodiment of the present application may include:

steps S1301 to S1308 refer to steps 11 to S18 in the embodiment shown in fig. 1B.

Step S1309, the UDM determines an NRF according to the feature information of the target slice, and sends a request message C to the NRF.

Exemplarily, the request message C is used for requesting the NRF to acquire address information of NF in the target slice corresponding to the feature information of the target slice, and the request message C may carry the feature information of the target slice; of course, other information may also be carried, which is not limited in the embodiments of the present application.

Step S1310, the NRF determines the address information of the NF in the target slice according to the feature information of the target slice, and sends a response message C to the UDM.

Exemplarily, the response message C may carry address information of the NF within the target slice; of course, other information may also be carried, which is not limited in the embodiments of the present application.

Step S1311, the UDM returns an acknowledgement message to the initial AMF.

Step S1312, the target AMF sends a registration success response message to the terminal.

Fig. 14 is a schematic structural diagram of a core network device according to an embodiment of the present application. For example, the core network device involved in this embodiment may be a first core network device. As shown in fig. 14, the first core network device 140 provided in this embodiment may include: a first receiving module 1401, a first obtaining module 1402 and a sending module 1403.

Wherein, the first receiving module 1401 is configured to receive a request message from a sending device; wherein, the request message carries the target user identification; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier;

a first obtaining module 1402, configured to obtain information of the target slice according to the target user identifier;

a sending module 1403, configured to send a response message to the sending device; wherein, the response message carries the information of the target slice.

In a possible implementation manner, if the information of the target slice includes feature information of the target slice, the first obtaining module 1402 is specifically configured to:

In a possible implementation manner, if the information of the target slice includes address information of NFs in the target slice, the first obtaining module 1402 includes:

In a possible implementation manner, the first core network device 140 further includes:

The first core network device 140 provided in this embodiment of the present application may be configured to execute the technical solution related to the first core network device in the corresponding information transmission method embodiment of the present application, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 15 is a schematic structural diagram of a core network device according to another embodiment of the present application. For example, the core network device involved in this embodiment may be a first core network device. As shown in fig. 15, the first core network device 150 provided in this embodiment may include: a processor 1501 and memory 1502;

wherein the memory 1502 is used to store program instructions;

the processor 1501 is configured to call and execute the program instruction stored in the memory 1502, and when the processor 1501 executes the program instruction stored in the memory 1502, the first core network device 150 is configured to execute the technical solution of the first core network device in the above-described corresponding information transmission method embodiment of the present application, which has similar implementation principles and technical effects, and is not described herein again.

It will be appreciated that fig. 15 only shows a simplified design of the first core network device. In other embodiments, the first core network device may further include any number of transceivers, processors, memories, and/or communication units, and the like, which are not limited in this embodiment.

Fig. 16 is a schematic structural diagram of a gateway device according to an embodiment of the present application. As shown in fig. 16, the gateway device 160 provided in this embodiment may include: a first sending module 1601, a first receiving module 1602, and a second sending module 1603.

The first sending module 1601 is configured to send a request message to a first core network device; wherein, the request message carries the target user identification; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier;

a first receiving module 1602, configured to receive a response message from the first core network device; wherein, the response message carries the information of the target slice;

a second sending module 1603, configured to send a service request to the network function NF in the target slice according to the information of the target slice.

In a possible implementation manner, if the information of the target slice includes feature information of the target slice, the second sending module 1603 includes:

In one possible implementation, the gateway device 160 further includes:

In a possible implementation manner, if the information of the target slice includes address information of NFs in the target slice, the second sending module 1603 is specifically configured to:

The gateway device 160 provided in the embodiment of the present application may be configured to execute the technical solution related to the gateway device in the corresponding information transmission method embodiment of the present application, and the implementation principle and the technical effect are similar, which are not described herein again.

Fig. 17 is a schematic structural diagram of a gateway device according to another embodiment of the present application. As shown in fig. 17, the gateway device 170 provided in this embodiment may include: a processor 1701 and a memory 1702;

wherein the memory 1702 is used for storing program instructions;

the processor 1701 is configured to call and execute the program instruction stored in the memory 1702, and when the processor 1701 executes the program instruction stored in the memory 1702, the gateway device 170 is configured to execute the technical solution related to the gateway device in the above-mentioned corresponding information transmission method embodiment of the present application, which implements similar principles and technical effects, and is not described herein again.

It will be appreciated that fig. 17 only shows a simplified design of the gateway device. In other embodiments, the gateway device may further include any number of transceivers, processors, memories, and/or communication units, and the like, which are not limited in this embodiment.

Fig. 18 is a schematic structural diagram of a core network device according to another embodiment of the present application. For example, the core network device involved in this embodiment may be a first core network device. As shown in fig. 18, the first core network device 180 provided in this embodiment may include: a receiving module 1801, a determining module 1802, and a transmitting module 1803.

The receiving module 1801 is configured to receive a request message from a sending device; wherein, the request message carries the characteristic information of the target slice; the request message is used for indicating to request the first core network device for address information of the network function NF in the target slice;

a determining module 1802, configured to determine address information of the NF in the target slice according to the feature information of the target slice and mapping information between the slice feature information and NF address information;

a sending module 1803, configured to send a response message to the sending device; wherein, the response message carries the address information of the NF in the target slice.

The first core network device 180 provided in this embodiment of the present application may be configured to execute the technical solution related to the first core network device in the corresponding information transmission method embodiment of the present application, and the implementation principle and the technical effect are similar, which are not described herein again.

Another embodiment of the present application provides a core network device. For example, the core network device involved in this embodiment may be a first core network device, and a schematic diagram thereof may be shown in fig. 15. The first core network device provided in this embodiment may include: a processor and a memory;

wherein the memory is to store program instructions;

the processor is configured to call and execute the program instruction stored in the memory, and when the processor executes the program instruction stored in the memory, the first core network device is configured to execute the technical scheme of the first core network device in the corresponding information transmission method embodiment described above, which is similar in implementation principle and technical effect and is not described herein again.

The embodiment of the present application further provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the technical scheme related to the first core network device in the foregoing information transmission method embodiment of the present application, and the implementation principle and the technical effect of the technical scheme are similar, and are not described here again. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

The embodiment of the present application further provides a program, where the program is used to execute the technical solution related to the first core network device in the foregoing information transmission method embodiment of the present application when executed by the processor, and the implementation principle and the technical effect are similar, and are not described herein again.

The embodiments of the present application further provide a computer program product including instructions, which when run on a computer, enables the computer to execute the technical solution related to the first core network device in the above embodiments of the information transmission method of the present application, and the implementation principle and the technical effect thereof are similar, and are not described herein again.

An embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer is enabled to execute the technical solution related to the first core network device in the above embodiment of the information transmission method in the present application, and implementation principles and technical effects thereof are similar, and are not described herein again.

The embodiment of the present application further provides a chip system, where the chip system includes a processor and may further include a memory, and is used to implement the technical scheme related to the gateway device in the foregoing information transmission method embodiment of the present application, and the implementation principle and the technical effect of the technical scheme are similar, and are not described here again. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

The embodiment of the present application further provides a program, where the program is used to execute the technical solution related to the gateway device in the foregoing information transmission method embodiment of the present application when executed by the processor, and the implementation principle and the technical effect are similar, and are not described herein again.

The embodiments of the present application further provide a computer program product including instructions, which when run on a computer, enables the computer to execute the technical solution related to the gateway device in the above embodiments of the information transmission method of the present application, and the implementation principle and the technical effect are similar, and are not described herein again.

An embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer, the computer is enabled to execute the technical solution related to the gateway device in the foregoing information transmission method embodiment of the present application, and implementation principles and technical effects thereof are similar, and are not described herein again.

It should be noted that, as can be understood by those skilled in the art, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The processors referred to in the embodiments of the present application may be general purpose processors, digital signal processors, application specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

The memory related to the embodiment of the present application may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

1. An information transmission method, comprising:

the first core network equipment receives a request message from the sending equipment; wherein, the request message carries a target user identifier; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier;

the first core network equipment sends a response message to the sending equipment; the response message carries information of the target slice, so that the sending equipment sends a service request to a Network Function (NF) in the target slice according to the information of the target slice;

the information of the target slice includes at least one of: the characteristic information of the target slice and the address information of the network function NF in the target slice have a mapping relation.

2. The method according to claim 1, wherein if the information of the target slice includes feature information of the target slice, the obtaining, by the first core network device, the information of the target slice according to the target user identifier includes:

3. The method according to claim 1, wherein if the information of the target slice includes address information of NFs in the target slice, the obtaining, by the first core network device, the information of the target slice according to the target user identifier includes:

4. The method according to claim 3, wherein the obtaining, by the first core network device, the information of the target slice according to the characteristic information of the target slice includes:

5. The method according to claim 3, wherein the obtaining, by the first core network device, the information of the target slice according to the characteristic information of the target slice includes:

6. The method of claim 5, further comprising:

and the first core network equipment acquires the address information of the NF in the target slice from third core network equipment according to the characteristic information of the target slice.

7. The method according to any one of claims 1-6, further comprising:

and the first core network equipment receives the slice characteristic information corresponding to at least one user identifier sent by the fourth core network equipment.

8. The method according to claim 1, wherein if the information of the target slice includes address information of NFs in the target slice, the obtaining, by the first core network device, the information of the target slice according to the target user identifier includes:

9. The method according to claim 8, wherein the obtaining, by the first core network device, the information of the target slice according to the characteristic information of the target slice includes:

10. The method according to claim 8, wherein the obtaining, by the first core network device, the information of the target slice according to the characteristic information of the target slice includes:

the first core network equipment determines sixth core network equipment corresponding to the target user identification according to the characteristic information of the target slice;

11. An information transmission method, comprising:

the gateway equipment sends a request message to the first core network equipment; wherein, the request message carries a target user identifier; the request message is used for indicating to request the first core network device for the information of the target slice corresponding to the target user identifier;

the gateway device receives a response message from the first core network device; wherein the response message carries information of the target slice;

the gateway equipment sends a service request to a Network Function (NF) in the target slice according to the information of the target slice; the information of the target slice includes at least one of: the characteristic information of the target slice and the address information of the network function NF in the target slice have a mapping relation.

12. The method of claim 11, wherein if the information of the target slice includes feature information of the target slice, the gateway device sends a service request to a network function NF in the target slice according to the information of the target slice, including:

13. The method of claim 12, wherein the obtaining, by the gateway device, address information of NFs in the target slice according to the feature information of the target slice comprises:

the gateway equipment determines second core network equipment corresponding to the target user identification according to the characteristic information of the target slice;

14. The method of claim 12, wherein the obtaining, by the gateway device, address information of NFs in the target slice according to the feature information of the target slice comprises:

15. The method of claim 12, wherein the obtaining, by the gateway device, address information of NFs in the target slice according to the feature information of the target slice comprises:

16. The method of claim 15, further comprising:

and the gateway equipment receives at least one piece of slice characteristic information sent by the slice manager and NF address information corresponding to each piece of slice characteristic information.

17. The method of claim 11, wherein if the information of the target slice includes address information of NFs in the target slice, the gateway device sends a service request to a network function NF in the target slice according to the information of the target slice, including:

and the address information of the NF in the target slice is acquired by the first core network equipment according to the characteristic information of the target slice after acquiring the characteristic information of the target slice according to the target user identification.

18. The method according to claim 17, wherein the address information of the NF in the target slice is acquired by the first core network device from a third core network device according to the feature information of the target slice after acquiring the feature information of the target slice according to the target user identifier.

19. The method according to claim 17, wherein the address information of the NF in the target slice is determined by the first core network device according to the feature information of the target slice and mapping information between the slice feature information and NF address information after the feature information of the target slice is obtained according to the target user identifier.

20. An information transmission method, comprising:

the first core network equipment receives a request message from the sending equipment; wherein the request message carries characteristic information of the target slice; the request message is used for indicating to request the first core network device for address information of a Network Function (NF) in the target slice;

the first core network equipment sends a response message to the sending equipment; and the response message carries address information of the NF in the target slice, so that the sending equipment sends a service request to the NF according to the address information of the NF in the target slice.

21. The method of claim 20, wherein the characteristic information of the target slice comprises at least one of: identification information of the target slice, identification information of a public-NF repository function NRF, and identification information of a private-NRF.

22. A core network device, wherein the core network device is a first core network device, and the first core network device includes: a processor and a memory;

wherein the memory is to store program instructions;

the processor configured to invoke and execute program instructions stored in the memory, and when the processor executes the program instructions stored in the memory, the first core network device is configured to perform the method according to any one of claims 1 to 10.

23. A gateway device, comprising: a processor and a memory;

wherein the memory is to store program instructions;

the processor to invoke and execute program instructions stored in the memory, the gateway device to perform the method of any of claims 11 to 19 when the processor executes the program instructions stored in the memory.

24. A core network device, wherein the core network device is a first core network device, and the first core network device includes: a processor and a memory;

wherein the memory is to store program instructions;

the processor configured to invoke and execute program instructions stored in the memory, and when the processor executes the program instructions stored in the memory, the first core network device is configured to perform the method according to any one of claims 20 to 21.

25. A computer-readable storage medium having stored therein instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 10.

26. A computer-readable storage medium having stored therein instructions which, when run on a computer, cause the computer to perform the method of any one of claims 11 to 19.

27. A computer-readable storage medium having stored therein instructions which, when run on a computer, cause the computer to perform the method of any one of claims 20 to 21.