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    • 87. 发明授权
    • Systems and methods for emergency call route failover
    • 用于紧急呼叫路由故障切换的系统和方法
    • US09426833B2
    • 2016-08-23
    • US13783184
    • 2013-03-01
    • T-Mobile USA, Inc.
    • Shujaur Rehman MuftiWilliam Michael Hooker
    • H04M11/04H04W76/00
    • H04W24/04H04L65/1016H04L65/1046H04L65/1069H04W4/90H04W76/10H04W76/50H04W80/04H04W88/16
    • 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.
    • 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。
    • 90. 发明申请
    • Secure In-Band Signaling Method for Mobility Management Crossing Firewalls
    • 用于穿越防火墙的移动管理的安全带内信令方法
    • US20160212097A1
    • 2016-07-21
    • US15082270
    • 2016-03-28
    • AT&T INTELLECTUAL PROPERTY II, LP
    • HUI LUO
    • H04L29/06
    • H04L63/02H04L29/06H04L63/029H04L63/08H04L63/1458H04W12/12H04W36/0011H04W80/04
    • An in-band signaling method that enables secure updates of a care-of-IP address for a mobile host that roams between access networks. In the illustrative embodiment described herein, a mobile host includes an intelligent interface that handles IP networking functions and tunnels IP packets between the mobile host and the mobile host's home agent/remote access server (HA/RAS) transparently, as if the mobile host established a connection to a communicating or destination host (DST) from the home network (where the HA/RAS resides). In accordance with an aspect of the invention, there is provided an in-band signaling method that employs encrypted three-way handshake signaling messages that are embedded in encapsulated IP packets to enable care-of IP address updates. This method can effectively protect mobile hosts from denial-of-service attacks and is transparent to NAT/NAPT firewalls. The signaling messages are communicated between the home agent and the mobile host, in a manner transparent to any NAT/NAPT firewall in the network.
    • 一种带内信令方法,其能够对在接入网络之间漫游的移动主机的转交IP地址进行安全更新。 在本文描述的说明性实施例中,移动主机包括智能接口,其处理IP网络功能并且透明地在移动主机和移动主机的归属代理/远程访问服务器(HA / RAS)之间隧道IP分组,就好像移动主机建立 与家庭网络(HA / RAS所在的地方)的通信或目标主机(DST)的连接。 根据本发明的一个方面,提供了一种带内信令方法,其采用嵌入在封装的IP分组中的加密的三次握手信令消息来实现转发IP地址更新。 这种方法可以有效地保护移动主机免受拒绝服务攻击,并且对NAT / NAPT防火墙是透明的。 信令消息在归属代理和移动主机之间以对于网络中的任何NAT / NAPT防火墙透明的方式进行通信。