Registration method, session establishment method, terminal, and AMF entity

Patent metadata

Field	Value
Publication number	US-11523465-B2
Application number	US-202117177552-A
Country	US
Kind code	B2
Filing date	Feb 17, 2021
Priority date	Jun 19, 2017
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A registration method, a session establishment method, a terminal, and an access and mobility management function (AMF) entity, where the method includes: sending, by a terminal, a first message to the AMF entity, where the first message includes first information, first network slice selection information, and second network slice selection information, the first information includes information for requesting to establish a protocol data unit (PDU) session, the first network slice selection information is used by the AMF entity to select a first session management function (SMF) entity, and the second network slice selection information is used by the AMF entity to select a second SMF entity; and receiving, by the terminal, a second message from the AMF entity, where the second message includes second information, and the second information includes PDU session establishment accept information.

First claim

What is claimed is:

1. A session establishment method, comprises:
receiving, by an access and mobility management function entity from a terminal, a message comprising first network slice selection information, second network slice selection information, and first information for requesting to establish a protocol data unit session;
determining, by the access and mobility management function entity, a first session management control function entity in a visited public land mobile network (VPLMN) based on the first network slice selection information;
determining, by the access and mobility management function entity, a second session management control function entity in a home public land mobile network (HPLMN) based on the second network slice selection information;
sending, by the access and mobility management function entity to the first session management control function entity, a message comprising the first information; and
receiving, by the first session management control function entity, the message comprising the first information from the access and mobility management function entity.

2. The session establishment method of claim 1 , wherein the second message comprising e first information further comprises second information of the second session management control function entity.

3. The session establishment method of claim 2 , wherein the second information comprises an identity of the second session management control function entity.

4. The session establishment method of claim 1 , further comprising:
selecting, by the first session management control function entity, a first user plane function entity in the VPLMN;
sending, by the first session management control function entity, a request message to the second session management control function entity, wherein the request message comprises first tunnel information of a tunnel between the first user plane function entity and a second user plane function entity in the HPLMN, and wherein the first tunnel information is at the first user plane function entity; and
receiving, by the first session management control function entity, a response message from the second session management control function entity, wherein the response message comprises second tunnel information of the tunnel, and wherein the second t gel information is at the second user plane function entity.

5. The session establishment method of claim 4 , further comprising, sending, by the first session management control function entity to the first user plane function entity, the first tunnel information, the second tunnel information, and third tunnel information of the tunnel, and wherein the third tunnel information is at a radio access network.

6. The session establishment method of claim 4 , further comprising:
sending, by the first session management control function entity, the first tunnel information to the access and mobility management function entity; and
sending, by the access and mobility management function entity, the first tunnel information to a radio access network.

7. The session establishment method of claim 1 , further comprising:
receiving, by the access and mobility management function entity from the first session management control function entity, information indicating that establishment of the protocol data unit session is accepted; and
sending, by the access and mobility management function entity to the terminal, information indicating that the establishment of the protocol data unit session is accepted.

8. The session establishment method of claim 1 , wherein the first network slice selection information comprises first single network slice selection assistance information for the VPLMN, and wherein the second network slice selection information comprises second single network slice selection assistance information for the HPLMN.

9. The session establishment method of claim 8 , wherein the first single network slice selection assistance information corresponds to an application.

10. The session establishment method of claim 9 , wherein the second single network slice selection assistance information corresponds to the application.

11. A network system, comprising:
a first session management control function entity in a visited public land mobile network (VPLMN), wherein the first session management control function entity is configured to receive a message comprising first information for requesting to establish a protocol data unit session; and
an access and mobility management function entity configured to:
receive, from a terminal, a message comprising first network slice selection information, second network slice selection information, and the first information;

determine the first session management control function entity based on the first network slice selection information;
determine a second session management control function entity in a home public land mobile network (HPLMN) based on the second network slice selection information; and
send the message comprising the first information to the first session management control function entity.

12. The network system of claim 11 , wherein the message comprising the first information further comprises second information of the second session management control function entity.

13. The network system of claim 12 , wherein the second information comprises an identity of the second session management control function entity.

14. The network system of claim 11 , further comprising a first user plane function entity in the VPLMN, wherein the first session management control function entity is further configured to:
select the first user plane function entity;
send a request message to the second session management control function entity, wherein the request message comprises first tunnel information of a tunnel between the first user plane function entity and a second user plane function entity in the HPLMN, and wherein the first tunnel information is at the first user plane function entity; and
receive a response message from the second session management control function entity, wherein the response message comprises second tunnel information of the tunnel and wherein the second tunnel information is at the second user plane function entity.

15. The network system of claim 14 , wherein the first session management control function entity is further configured to send, to the first user plane function entity, the first tunnel information, the second tunnel information, and third tunnel information of the tunnel, and wherein the third tunnel information is at a radio access network.

16. The network system of claim 14 , wherein the first session management control function entity is further configured to send the first tunnel information to the access and mobility management function entity, and wherein the access and mobility management function entity is further configured to send the first tunnel information to a radio access network.

17. The network system of claim 11 , wherein the access and mobility management function entity is further configured to:
receive from the first session management control function entity, information indicating that establishment of the protocol data unit session is accepted; and
send, to the terminal, information indicating that the establishment of the protocol data unit session is accepted.

18. The network system of claim 11 , wherein the first network slice selection information comprises first single network slice selection assistance information for the VPLMN, and wherei

Assignees

• Huawei Tech Co Ltd

Inventors

• Yang Haorui
• Jin Hui
• Ouyang Guowei
• He Yue
• Dou Fenghui
• Li Xiaojuan

Classifications

• H04L67/51

  Discovery or management thereof, e.g. service location protocol [SLP] or web services · CPC title

• H04W80/10 Primary

  adapted for {application} session management, e.g. SIP [Session Initiation Protocol] {(connection management H04W76/00; arrangements for session management H04L67/14)} · CPC title

• H04W76/12 Primary

  Setup of transport tunnels · CPC title

• H04L41/5051

  Service on demand, e.g. definition and deployment of services in real time · CPC title

• H04W8/26

  Network addressing or numbering for mobility support · CPC title