US 2015/0029941 A1 · Public Services Access Point (PSAP) Designation of Preferred Emergency Call Routing Method Via Internet or Public Switched Telephone Network (PSTN)

Abstract

The use of the VoIP emergency network for routing wireless E911 calls to a designated PSAP. In this embodiment, a mobile positioning center (MPC) assigns an ESRK per existing prior art, but uses the invention to route the call to the PSAP via the VoIP server and an ESGW. This relieves wireless carriers of the obligation to install and maintain expensive dedicated SS7 or CAMA trunks from each MSC to each selective router in the areas served by that MSC. Instead, wireless 911 calls can be consolidated by ESGW vendors, maximizing the efficiency of the dedicated trunks to the selective router by sharing those trunks with multiple MSCs.

Claims14

Dependent claims

A method of providing a wireless mobile switching center (MSC) with access to an Enhanced 911 network supporting a public safety answering point (PSAP), comprising:

receiving a circuit-switched 911 call associated with a wireless phone device at a voice over Internet protocol (VoIP) call server;
converting, at said voice over Internet protocol VoIP) call server, said circuit-switched 911 call to an Internet Protocol (IP) 911 call;
associating a particular emergency services routing key (ESRK), received from a positioning center, with said circuit-switched-to-IP converted call and a specific Public Safety Access Point (PSAP);
and
transmitting, via an appropriate selective router selected according to said ESRK, said circuit-switched-to-IP converted 911 call from said VoIP call server to said specific PSAP.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/513,917Filed 14 Oct 2014

Priority

19 Dec 2003

Published

29 Jan 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04L 65/1069
Session management: session establishment or de-establishment
H04L 65/1046
Architectures or entities: call controllers; Call servers
H04M 7/1235
Details of core network interconnection arrangements: where one of the core networks is a wireless network
H04W 4/90
Services specially adapted for wireless communication networks; Facilities therefor: services for handling of emergency or hazardous situations,…

Family

Application10/739,292Continuation · filed 19 Dec 2003

Application11/150,343Continuation · filed 13 Jun 2005

Application11/475,220Continuation · filed 27 Jun 2006

Application12/929,992Continuation in part · filed 1 Mar 2011

Application14/513,917Continuation

Application11/475,220Continuation in part

Application12/929,992Continuation

US 2005/0135569 A1Published application

US 2006/0280164 A1Published application

US 2007/0298765 A1Published application

US 2011/0149851 A1Published application

US 6,940,950 B2Related patent

US 7,903,791 B2Related patent

US 8,873,718 B2Related patent

US 2015/0029941 A1This patent

From the US filing history. Foreign family members aren’t listed.

Public Services Access Point (PSAP) Designation of Preferred Emergency Call Routing Method Via Internet or Public Switched Telephone Network (PSTN)

Life of this patent

Public Services Access Point (PSAP) Designation of Preferred Emergency Call Routing Method Via Internet or Public Switched Telephone Network (PSTN)

Life of this patent

Abstract

Claims14