Registration and session establishment methods, terminal and AMF (Access and Mobility Management Function) entity

Abstract

The embodiment of the application relates to registration and session establishment methods, a terminal and an AMF (Access and Mobility Management Function) entity. The session establishment method comprises the following steps that: a terminal sends a first message to the AMF entity, wherein the first message includes first information, first network slice selection information and second networkslice selection information, the first information includes information for requesting the establishment of a protocol data unit (PDU) session, the first network slice selection information is used by the AMF entity to select a first session management control function (SMF) entity, and the second network slice selection information is used by the AMF entity to select a second SMF entity; and theterminal receives a second message sent by the AMF entity, wherein the second message includes second information, and the second information includes information accepted by PDU session establishment. Through adoption of the registration and session establishment methods, the AMF entity can accurately determine S-NSSAI (Single Network Slice Selection Information) during establishment of the PDUsession in order to completes the establishment of the PDU session.

Description

[0001] This application is a divisional application of a Chinese invention patent application with the filing date of June 19, 2017, the application number being "201780003857.0", and the title "A method for registration and session establishment, terminal and AMF entity". Technical field [0002] The embodiments of the present application relate to the field of communication technologies, and in particular to a method for terminal registration and session establishment, terminal and access and mobility management function (AMF) entities. Background technique [0003] With the development of communication technology and the continuous improvement of users' demands for communication networks, the standardization of 5G communication network technology (also known as fifth-generation mobile communication technology) is proceeding rapidly. In 5G communication network technology, the logical concept of network slicing is introduced. The operator will pre-configure a network slice selec...

AI Technical Summary

Problems solved by technology

[0004] However, there may be a situation where the UE is not pre-configured with an NSSP for visiting a public land mobile network (visited public landmobile network, VPLMN). When the UE roams under the VPLMN, the UE does not have an NSSP for the VPLMN, and cannot determine which slice it is on Establish PDU session

It may also exist that when the UE roams to a certain VPLMN, the UE obtains the NSSP of the VPLMN, but when the UE needs to use the App of the home public land mobile network (home public land mobile network, HPLMN), in the NSSP of the VPLMN The corresponding rule cannot be found, and the UE cannot determine the S-NSSAI used to establish the PDU session

Images