公开(公告)号：US10305657B2

公开(公告)日：2019-05-28

申请号：US15727405

申请日：2017-10-06

Applicant: T-Mobile U.S.A., Inc.

Inventor： Mayank Kaul ,  Shujaur Rehman Mufti

IPC: H04M11/04 ,  H04L5/00 ,  H04M7/00 ,  H04W4/90

Abstract: Systems and methods are described herein for handling E911 communications within IMS networks, such as Voice over LTE (VoLTE) networks. In some embodiments, the systems and methods, via various communication nodes, handle or otherwise govern emergency calls within the VoLTE network, by sending an INVITE message from a sender node of the VoLTE network to a recipient node of the VoLTE network, and starting a retry timer at the sender node that is specific to handling E911 calls by the VoLTE network.

公开(公告)号：US20180035272A1

公开(公告)日：2018-02-01

申请号：US15727405

申请日：2017-10-06

Applicant: T-Mobile U.S.A., Inc.

Inventor： Mayank Kaul ,  Shujaur Rehman Mufti

IPC: H04W4/22 ,  H04M7/00 ,  H04L5/00

CPC classification number: H04L5/0048 ,  H04M3/5116 ,  H04M7/006 ,  H04W4/90

Abstract: Systems and methods are described herein for handling E911 communications within IMS networks, such as Voice over LTE (VoLTE) networks. In some embodiments, the systems and methods, via various communication nodes, handle or otherwise govern emergency calls within the VoLTE network, by sending an INVITE message from a sender node of the VoLTE network to a recipient node of the VoLTE network, and starting a retry timer at the sender node that is specific to handling E911 calls by the VoLTE network.

公开(公告)号：US09807580B1

公开(公告)日：2017-10-31

申请号：US15170861

申请日：2016-06-01

Applicant: T-Mobile U.S.A., Inc.

Inventor： Mayank Kaul ,  Shujaur Rehman Mufti

IPC: H04M11/04 ,  H04W4/22 ,  H04M7/00 ,  H04L5/00

CPC classification number: H04W4/22 ,  H04L5/0048 ,  H04M7/006 ,  H04W4/90

Abstract: Systems and methods are described herein for handling E911 communications within IMS networks, such as Voice over LTE (VoLTE) networks. In some embodiments, the systems and methods, via various communication nodes, handle or otherwise govern emergency calls within the VoLTE network, by sending an INVITE message from a sender node of the VoLTE network to a recipient node of the VoLTE network, and starting a retry timer at the sender node that is specific to handling E911 calls by the VoLTE network.

公开(公告)号：US20160360431A1

公开(公告)日：2016-12-08

申请号：US15242426

申请日：2016-08-19

Applicant: T-Mobile U.S.A., Inc.

Inventor： Shujaur Rehman Mufti ,  William Michael Hooker

IPC: H04W24/04 ,  H04W76/02 ,  H04W4/22

CPC classification number: H04W24/04 ,  H04L65/1016 ,  H04L65/1046 ,  H04L65/1069 ,  H04W4/90 ,  H04W76/10 ,  H04W76/50 ,  H04W80/04 ,  H04W88/16

Abstract: A system and method for performing an emergency call route failover between an Emergency Call Session Control Function (E-CSCF) and multi-homed remote end-point functions such as Border Gateway Control Function(BGCF)/Media Gateway Control Function (MGCF) or Interconnection Border Control Function (IBCF) in an Internet Protocol Multimedia Subsystem (IMS) uses Session Initiation Protocol (SIP) and/or Domain Name System (DNS) methods. The E-CSCF and/or a DNS server monitors the availability of the remote end-points to create a peer list of route options. The E-CSCF or the DNS server selects a route option from the peer list to route an emergency call to an appropriate Public Safety Answering Point (PSAP). In the event that the route option fails, the E-CSCF fails over to the next available route option to route the emergency call.

Abstract translation: 一种用于在紧急呼叫会话控制功能（E-CSCF）和诸如边界网关控制功能（BGCF）/媒体网关控制功能（MGCF）等多宿主远程端点功能之间执行紧急呼叫路由故障切换的系统和方法， 互联网协议多媒体子系统（IMS）中的互连边界控制功能（IBCF）使用会话发起协议（SIP）和/或域名系统（DNS）方法。 E-CSCF和/或DNS服务器监视远程端点的可用性，以创建路由选项的对等列表。 E-CSCF或DNS服务器从对等体列表中选择路由选项，将紧急呼叫路由到适当的公共安全应答点（PSAP）。 如果路由选项失败，则E-CSCF故障转移到下一个可用路由选项以路由紧急呼叫。

公开(公告)号：US09967760B2

公开(公告)日：2018-05-08

申请号：US15242426

申请日：2016-08-19

Applicant: T-Mobile U.S.A., Inc.

Inventor： Shujaur Rehman Mufti ,  William Michael Hooker

IPC: H04M11/04 ,  H04W24/04 ,  H04W76/00 ,  H04L29/06 ,  H04W4/22 ,  H04W76/02 ,  H04W80/04 ,  H04W88/16

CPC classification number: H04W24/04 ,  H04L65/1016 ,  H04L65/1046 ,  H04L65/1069 ,  H04W4/90 ,  H04W76/10 ,  H04W76/50 ,  H04W80/04 ,  H04W88/16

Abstract: A system and method for performing an emergency call route failover between an Emergency Call Session Control Function (E-CSCF) and multi-homed remote end-point functions such as Border Gateway Control Function(BGCF)/Media Gateway Control Function (MGCF) or Interconnection Border Control Function (IBCF) in an Internet Protocol Multimedia Subsystem (IMS) uses Session Initiation Protocol (SIP) and/or Domain Name System (DNS) methods. The E-CSCF and/or a DNS server monitors the availability of the remote end-points to create a peer list of route options. The E-CSCF or the DNS server selects a route option from the peer list to route an emergency call to an appropriate Public Safety Answering Point (PSAP). In the event that the route option fails, the E-CSCF fails over to the next available route option to route the emergency call.