Modernized messaging compatibility with interim text-to-911

Patent metadata

Field	Value
Publication number	US-11272347-B2
Application number	US-202017068777-A
Country	US
Kind code	B2
Filing date	Oct 12, 2020
Priority date	Aug 19, 2019
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

Systems and methods are described herein for handling a request for a text message session on an IP multimedia subsystem (IMS) capable network. For example, a device is communicatively coupled at a location of the IMS capable network. The method includes receiving a request from the device for a text message session on the IMS capable network and determining whether the IMS capable network supports next generation 911 (NG911) or interim text-to-911 at the location of the device. Upon determining that the IMS capable network is incapable of supporting NG911, redirecting the request for the text message session to a text control center (TCC). The method further includes causing the TCC to establish the text message session with a public safety answering point (PSAP) that supports text-to-911.

First claim

I claim:

1. At least one computer-readable medium, excluding transitory signals and carrying instructions, which when executed by at least one data processor, performs operations to handle a request for an emergency text message session on an IP multimedia subsystem (IMS) capable network, the operations comprising:
determine a location of a device on the IMS capable network based on received location information;
identify a capability of the IMS capable network to support NG911 or interim text-to-911 for the device based on public safety profile information;
when the IMS capable network is capable of supporting the device with NG911, direct the request for the emergency text message session to a NG911 enabled public safety answering point (PSAP); and
when the IMS capable network is incapable of supporting the device with NG911 and is capable of supporting the device with interim text-to-911, redirect the request for the emergency text message session to a text control center (TCC).

2. The computer-readable storage medium of claim 1 , wherein the text message session is a message session relay protocol (MSRP) session.

3. The computer-readable storage medium of claim 1 , further comprising:
performing a lookup procedure in public safety profile information to identify whether the IMS capable network is capable of supporting NG911 or text-to-911 at the location of the device.

4. The computer-readable storage medium of claim 1 , wherein the request is for an NG911 emergency service.

5. The computer-readable storage medium of claim 1 , further comprising:
determining that the IMS capable network is capable of supporting the device with interim text-to-911 only after determining that the IMS capable network is incapable of supporting the device with NG911.

6. A computer-implementable method to handle a first request for a first emergency text message session on an IP multimedia subsystem (IMS) capable network, the method comprising:
determine a location of a first device on the IMS capable network based on received first location information;
identify a capability of the IMS capable network to support NG911 or interim text-to-911 for the device based on public safety profile information;
when the IMS capable network is capable of supporting the device with NG911, direct the request for the emergency text message session to a NG911 enabled public safety answering point (PSAP); and
when the IMS capable network is incapable of supporting the device with NG911 and is capable of supporting the device with interim text-to-911, redirect the request for the emergency text message session to a text control center (TCC).

7. The method of claim 6 further comprising,
receiving a second request from a second device for a second text message session on the IMS capable network, wherein the second device is at a second location different from a location of the IMS capable network; and
upon determining that the IMS capable network is capable of supporting NG911 at the second location, establishing the second text message session with a second PSAP of that supports NG911.

8. The method of claim 6 further comprising:
receiving a second request from a second device for a second text message session on the IMS capable network, wherein the second device is at a second location different from the first location; and
upon determining that the IMS capable network is incapable of supporting NG911 and incapable of supporting interim text-to-911, communicating a message for to prompt a user of the second device to establish a 911 voice call.

9. The method of claim 6 , wherein the first text message session is a message session relay protocol (MSRP) session.

10. The method of claim 6 , further comprising:
determining the first location of the first device based on information retrieved from a location server;
identifying a capability of the IMS capable network to support NG911 or interim text-to-911 at the first location based on public safety profile information, wherein the public safety profile information indicates that the first location supports interim text-to-911; and
retrieving routing information for the first text message session to the PSAP that supports text-to-911.

11. The method of claim 6 further comprising:
receiving the first request for the first text message session by a proxy call session control function (P-CSCF) node of the IMS capable network;
classifying the first request for the first text message session as an emergency text message session; and
directing the first request for the first text message session to an emergency call session control function (E-CSCF) node of the IMS capable network.

12. The method of claim 6 further comprising, when the first request for the first text message session is redirected to the TCC:
causing the TCC to interwork the first text message session to any of a TTY-capable PSAP, an HTTP-capable PSAP, and an MSRP-capable PSAP.

13. The method of claim 6 further comprising:
receiving a second request for a second text message session by a proxy call session control function (P-CSCF) node of the IMS capable network;
classifying the second request for the second text message session as a normal text message session; and
routing the second text message session as a normal text message session to a second device on the IMS capable network.

14. The method of claim 6 further comprising, prior to determining whether the IMS capable network supports NG911 or interim text-to-911:
receiving the first request for the first text message session by a proxy call session control function (P-CSCF) node of the IMS capable network;
classifying the first request for the first text message session as an emergency text message session; and
directing the first request for the first text message session to an emergency call session control function (E-CSCF) node of the IMS capable network to retrieve location information of the first device and routing information for the first text message session.

15. The method of claim 6 , further comprising:
performing a lookup procedure in a public safety profile information database, which maps multiple locations of the IMS capable network to a respective capability for NG911 or text-to-911.

16. A system for handling a request for an emergency text message session on an IP multimedia subsystem (IMS) capable network, the system comprising:
at least one hardware processor in the IMS capable network; and,
at least one computer-readable memory storing instructions to be executed by the at least one hardware processor, where execution of the instructions cause the system to:
determine a location of a device on the IMS capable network based on received location information;
identify a capability of the IMS capable network to support NG911 or interim text-to-911 for the device based on public safety profile information;
when the IMS capable network is capable of supporting the device with NG911, direct a request for a emergency text message session to a NG911 enabled public safety answering point (PSAP); and
when the IMS capable network is incapable of supporting the device with NG911 and is capable of supporting the device with interim text-to-911, redirect the request for the emergency text message session to a text control center (TCC).

17. The system of claim 16 , wherein the request for the emergency text message session is received by a proxy call session control function (P-CSCF) node and is directed by the P-CSCF to an emergency call session control function (E-CSCF) node of the IMS

Assignees

• T Mobile Usa Inc

Inventors

• Hooker William Michael

Classifications

• H04W4/14

  Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD] · CPC title

• H04L65/1016

  IP multimedia subsystem [IMS] · CPC title

• H04M3/42382

  Text-based messaging services in telephone networks such as PSTN/ISDN, e.g. User-to-User Signalling or Short Message Service for fixed networks · CPC title

• H04W4/90 Primary

  Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] · CPC title

• H04M3/5116 Primary

  for emergency applications · CPC title