公开(公告)号：US20170111512A1

公开(公告)日：2017-04-20

申请号：US15270624

申请日：2016-09-20

Applicant: QUALCOMM Incorporated

Inventor： Harish REDDY KOTHAKAPU ,  Bhanu Kiran JANGA ,  Ajit GUPTA ,  Venkatesh Savithri MAHESH ,  Guatam Kumar GUPTA ,  Raju KASARAMONI

IPC: H04M7/00 ,  H04W76/02 ,  H04L29/06

CPC classification number: H04W76/16 ,  H04L65/1016 ,  H04L65/1069 ,  H04W48/18

Abstract: Aspects of the present disclosure provide an apparatus and techniques for wireless communication by a user equipment (UE), such as placing a video telephony (VT) call when a user equipment (UE) is camped on a non-Internet Protocol Multimedia Subsystem (IMS) network, such as a non-IMS Long Term Evolution (LTE) network. The UE may be in a coverage area of a first radio access technology (RAT) supported by a first standard, and in a coverage area of a second RAT supported by a second standard. The UE may determine the LTE network does not support IMS services. In response to the determination, the UE may take one or more actions to place a VT call using the second RAT which supports IMS services.