Method for performing a procedure related to AMF registration by UDM in wireless communication system and apparatus for same

Patent metadata

Field	Value
Publication number	US-11700524-B2
Application number	US-202016895556-A
Country	US
Kind code	B2
Filing date	Jun 8, 2020
Priority date	Apr 27, 2017
Publication date	Jul 11, 2023
Grant date	Jul 11, 2023

Abstract

In one embodiment of the present invention, a method for enabling a UDM (Unified Data Management) to perform a registration related procedure of an AMF (Access and Mobility Management Function) in a wireless communication system comprises the steps of: receiving, by the UDM, a message related to serving AMF registration of a UE, which includes access type information and ID (Identity) information, from a first AMF; transmitting, by the UDM, a deregistration related message to a second AMF when the second AMF exists, wherein the second AMF is registered as a serving AMF of the UE and related to the access type information.

First claim

The invention claimed is:

1. A method for performing a registration related procedure in a wireless communication system, the method performed by a user equipment (UE) and comprising:
transmitting, by the UE and to a first access and mobility management function (AMF), a registration request message related to a registration, the registration request message being transmitted over one of 3GPP access and non-3GPP access; and
receiving, by the UE, a deregistration request message from a second AMF being as a serving AMF of the UE,
wherein the deregistration request message is received from the second AMF, when Unified Data Management (UDM) transmitted a deregistration related message to the second AMF, based on that an access type of the first AMF is the same as an access type of the second AMF, and
wherein the deregistration request message is received due to a withdraw of a subscriber's context by UDM (Unified Data Management).

2. A user equipment (UE) for performing a registration related procedure of an access and mobility management function (AMF), the UE comprising:
a transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
transmitting, to a first AMF, a first message related to a registration, the first message being transmitted over one of 3GPP access and non-3GPP access; and
receiving a deregistration request message from a second AMF being as a serving AMF of the UE,
wherein the deregistration request message is received from the second AMF, when Unified Data Management (UDM) transmitted a deregistration related message to the second AMF, based on that an access type of the first AMF is the same as an access type of the second AMF, and
wherein the deregistration request message is received due to a withdraw of a subscriber's context by UDM (Unified Data Management).

Assignees

• Lg Electronics Inc

Inventors

• Kim Laeyoung
• Kim Hyunsook
• Ryu Jinsook
• Park Sangmin
• Youn Myungjune

Classifications

• H04W36/14

  Reselecting a network or an air interface · CPC title

• H04W88/14

  Backbone network devices · CPC title

• H04W8/10 Primary

  between location register and external networks · CPC title

• H04W60/06

  De-registration or detaching · CPC title

• H04W8/06 Primary

  Registration at serving network Location Register, VLR or user mobility server · CPC title