System and method for routing short message service special number messages to local special number answering points

• US 8,204,520 B2
• Filed: 05/29/2007
• Issued: 06/19/2012
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: Intrado Life & Safety Incorporated
• Original Assignee: West Corporation
• Inventors: Hwang, Kuen-Yih
• Primary Examiner(s): Afshar, Kamran
• Assistant Examiner(s): Behnamian, Shahriar
• Application Number:
  US11/754,451
• Publication Number:
  US 20080045250A1
• Time in Patent Office: 1,848 Days
• Field of Search: 455/404.1, 455/414.1, 379/111, 379/45, 379/37
• US Class Current: 455/466
• CPC Class Codes: H04L 51/214 using selective forwarding
• CPC Class Codes: H04L 51/48 Message addressing, e.g. address format or anonymous messages, aliases
• CPC Class Codes: H04L 51/58 Message adaptation for wireless communication
• CPC Class Codes: H04W 4/14 Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 76/50 for emergency connections

Abstract

A system and method that overrides the initial destination number of an SMS message based on the destination number in the message itself. The communications device, a serving MSC or STP checks the destination address and overwrites the default SMSC address with a local special number service center address when it detects a special number destination address recognized anywhere in the world (e.g., 9-1-1, 1-1-2, 1-1-0, etc.). The message is then delivered to a local special number service center. The special number service center then delivers the message to an answering point, which then communicates with the caller.

Claims

1. A method for routing short message service (SMS) messages originating with an SMS-enabled wireless device and addressed to a special number addressee;

the method comprising;

(a) screening an SMS message for a special number addressee;

(b) if a special number addressee is detected during said screening, in no particular order;

(1) obtaining location information regarding current geographic position of said SMS-enabled wireless device;

(2) substituting an address of a special message center for an address of a short message service center assigned to the SMS-enabled wireless communications device; and

(3) routing the SMS message to the special message center; and

(c) employing said location information to effect forwarding the SMS message from said special message center to a special number answering point generally most proximate to said current geographic position.

2. A method in accordance with claim 1 wherein screening an SMS message for a special number comprises said SMS-enabled wireless device screening the SMS message for a special number.

3. A method in accordance with claim 1 wherein screening an SMS message for a special number comprises a mobile switching center screening the SMS message for a special number.

4. A method in accordance with claim 1 wherein screening an SMS message for a special number comprises a signaling transfer point screening the SMS message for a special number.

5. A method in accordance with claim 1 wherein forwarding the message to a special number answering point comprises:

identifying a determined special number answering point proximal to said SMS-enabled wireless communications device; and

forwarding the SMS message to the determined special number answering point.

6. An emergency message center comprising:

an interface configured to receive incoming short message service messages from a network;

a short message service routing database; and

a processor connected to said interface and said short message service routing database;

said processor being configured for screening said short message service messages for special number addressees;

if said processor detects a special number addressee in a respective said short message service message, said processor being configured for requesting or receiving location information relating to current geographic position of a sender of said respective incoming short message service message via said interface;

said processor querying said short message service routing database using said location information and one or more parameters from said respective incoming short message service message to identify short message service routing information for a respective public safety answering position generally most proximate to said current geographic position for receiving said respective incoming short message service message;

said processor effecting at least one of presenting and storing said short message service routing information.

7. An emergency message center in accordance with claim 6 further comprising:

a public safety answering point interface connected to said processor and a data network and configured to receive or retrieve from storage said short message service routing information;

said public safety answering point employing said short message service routing information to effect forward-routing said respective incoming short message service message via said data network to said respective public safety answering point generally most proximate to said position.

8. An emergency message center in accordance with claim 6 wherein said forward-routing is effected by an address of said respective public safety answering point generally most proximate to said position in said routing information.

9. An emergency message center in accordance with claim 8 wherein said one or more parameters includes a language.