Zusammenarbeit ohne N26-Schnittstellenunterstützung oder ohne Unterstützten Empfang im Nicht-3GPP-Zugriff

Details

Veröffentlichungs-Nr.

EP4312450

Aktenzeichen

EP23187163

Anmeldetag

24. Juli 2023

Veröffentlichung

21. Mai 2025

Erteilung

21. Mai 2025

Rechtsraum

EP

IPC

H04W36/18

Abstract

A method of performing intersystem change without N26 interface supported or not supported when a UE is registered to the same or different networks over 3GPP and non-3GPP accesses is proposed. UE registers to one or more PLMN/SNPN over 3GPP access (411) and non-3GPP access (421). UE receives a REGISTRATION ACCEPT message over 3GPP access (412), which carries a first 5GS network feature support IE, which indicates that interworking without N26 interface not supported. UE also receives a REGISTRATION ACCEPT message over non-3GPP access (422), which carries a second 5GS network feature support IE, which indicates that interworking without N26 interface supported. UE ignores the second indication received over non-3GPP access and considers that N26 interface is supported for interworking (441). As a result, after intersystem change from 5G to 4G, UE triggers a TAU procedure over LTE in 4G EPS (451).

Anmelder

Firmen

MEDIATEK INC.
MEDIATEK Inc.

Land

🇹🇼 Taiwan

Fachgebiete