Method for registeration and session establishment, terminal, and AMF entity

Abstract

The embodiments of the present application relate to a method for registeration and session establishment, a terminal, and an AMF entity. The session establishing method includes stesp that aterminalsends a first message to an access and mobility management function AMF entity, where the first message includes first information, first network slice selection information, and second network sliceselection information, the first information includes information of requesting 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 the terminal receives a second message sent by the AMF entity, wherein second message includes second information, and the second information includes information that the PDU session establishment accepts. In order toestablish a PDU session establishment process, the AMF entity accurately determines the S-NSSAI and completes the establishment of the PDU session.

Description

technical field [0001] The embodiment of the present application relates to the field of communication technologies, and in particular to a method for registering a terminal and establishing a session, a terminal, and an access and mobility management function (access and mobility management function, AMF) entity. Background technique [0002] With the development of communication technology and the continuous improvement of users' demands on communication networks, the standardization of 5G communication network technology (also known as the fifth generation mobile communication technology) is in rapid progress. In 5G communication network technology, the logical concept of network slicing is introduced. The operator will pre-configure a network slice selection policy (network slice selection policy, NSSP) for the terminal. It should be noted that the terminal may also be called a user equipment (user equipment, UE). The pre-configured NSSP consists of one or more rules (r...

AI Technical Summary

Problems solved by technology

[0003] 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

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