公开(公告)号：US20240357707A1

公开(公告)日：2024-10-24

申请号：US18303513

申请日：2023-04-19

申请人： T-Mobile USA, Inc.

发明人： Hang Hoi Yau ,  Christopher Joul ,  Hyung Keun Choi ,  Lin Zhang ,  Syed Hassan Raza ,  William Hooker ,  Srinivasa Rao Bodapotula ,  Anthony James Wageman

IPC分类号： H04W76/50 ,  H04L65/1016

CPC分类号： H04W76/50 ,  H04L65/1016

摘要： Solutions for placing an emergency call over a wireless network improve speed and reliability by prioritizing using an internet protocol (IP) multimedia subsystem (IMS) packet data network (PDN) or protocol data unit (PDU) network (PDN/PDU) over domain reselection when a call attempt fails over an emergency PDN/PDU (EPDN/EPDU). Examples include establishing an IMS PDN/PDU session for a user equipment (UE) over a wireless network; attempting, by the UE, an emergency call using an EPDN/EPDU over the wireless network; and based on at least a failure of the emergency call over the EPDN/EPDU, reattempting the emergency call using the IMS PDN/PDU over the wireless network. Based on at least a failure of the emergency call over the IMS PDN/PDU, the UE performs domain reselection and reattempts the emergency call using a second wireless network. In some examples, wireless networks transmit a network policy for handling the emergency call to the UE.

公开(公告)号：US10827338B1

公开(公告)日：2020-11-03

申请号：US16773451

申请日：2020-01-27

申请人： T-Mobile USA, Inc.

发明人： Srinivasa Rao Bodapotula ,  Homer Nicolas B. Filart ,  Jose R. Mendoza, Jr. ,  Sandip K. Shrestha ,  Sarah M. Fleming ,  Kevin Wai-Chun Lam ,  Tong Luo

IPC分类号： H04W4/90 ,  H04L29/06 ,  H04M3/42 ,  H04W4/12

摘要： A request is received to suspend providing scam protection to a user device that initiated an outgoing emergency voice call or an outgoing emergency communication message to a Public Safety Answering Point (PSAP). Scam protection for the user device is suspended for a predetermined time period, which allows the PSAP to make return emergency voice calls or send return emergency communication messages to the user device without the scam protection server marking the return emergency voice calls as a scam voice call or marking the emergency communication messages as a scam message during the predetermined time period.