公开(公告)号：US20180255594A1

公开(公告)日：2018-09-06

申请号：US15755360

申请日：2015-08-28

Applicant: APPLE INC.

Inventor： Huarui LIANG ,  Dawei ZHANG ,  Shangfeng LI ,  Hao SUN ,  Zhiwei WANG

IPC: H04W76/12 ,  H04L29/06 ,  H04W76/27

CPC classification number: H04W76/12 ,  H04L12/66 ,  H04L65/1006 ,  H04L65/1016 ,  H04L65/1069 ,  H04L65/1073 ,  H04L65/80 ,  H04W76/10 ,  H04W76/27

Abstract: A device, system, and method performs a Voice over Long Term Evolution (LTE) (VoLTE) call setup procedure. The device includes a transceiver establishing a connection with a LTE network and an Internet Protocol (IP) Multimedia Subsystem (IMS). The device includes a processor executing a VoLTE call application with a further user equipment, receiving an input to execute the VoLTE call application, and generating a data packet including an indication to trigger a dedicated bearer establishment procedure. The transceiver transmits the data packet to one of the LTE network and the IMS. The indication triggers the dedicated bearer establishment procedure to be performed during a Session Initiation Protocol (SIP) signal exchange procedure.