公开(公告)号：US20200267619A1

公开(公告)日：2020-08-20

申请号：US16869748

申请日：2020-05-08

Applicant: Mediatek Inc.

Inventor： Jen-Ping HUANG ,  Chien-Chun HUANG-FU ,  Pi-Yuan CHENG

IPC: H04W36/14 ,  H04W76/15 ,  H04W76/25 ,  H04W48/18 ,  H04W36/00 ,  H04W76/22

Abstract: A UE determines a set of RATs available in accordance with a first subscriber identity associated with a first network and a second subscriber identity associated with a second network. When the set includes a first RAT accessing a base station in the first network, a second RAT accessing a base station in the second network, and a third RAT accessing an access point of a WLAN, the UE selects, in a first performance configuration, the first RAT to establish a first call under the first subscriber identity. The UE further communicates, under the first subscriber identity, with a first IMS server of the first network through the first RAT to establish the first call. The UE maintains, under the second subscriber identity, a connection with a second IMS server of the second network through the first RAT or the third RAT when the first call is active.