公开(公告)号：US20220038885A1

公开(公告)日：2022-02-03

申请号：US16983160

申请日：2020-08-03

Applicant: MEDIATEK INC.

Inventor： Yung-Liang TSOU ,  Hao-Chen CHOU ,  Szu-Chieh CHIU ,  Chien-Yi WANG ,  Rohit NAIK

IPC: H04W8/12 ,  H04W48/00 ,  H04W76/30 ,  H04W36/00 ,  H04W36/32

Abstract: A method for robust moving between a roaming Third Generation Partnership Project (3GPP) network and a non-3GPP network is provided. The method includes the steps of: connecting with a home 3GPP network over one of a roaming 3GPP network and a non-3GPP network by a User Equipment (UE); performing a first initial attach procedure with the home 3GPP network over the other of the roaming 3GPP network and the non-3GPP network by the UE in response to the UE moving from the one of the roaming 3GPP network and the non-3GPP network to the other of the roaming 3GPP network and the non-3GPP network; and keeping the connection over the one of the roaming 3GPP network and the non-3GPP network by the UE during the first initial attach procedure over the other of the roaming 3GPP network and the non-3GPP network.