Wireless emergency services protocols translator between ANSI-41 and VoIP emergency services protocols

• US 8,369,316 B2
• Filed: 02/28/2011
• Issued: 02/05/2013
• Est. Priority Date: 05/30/2008
• Status: Expired due to Fees

• Current Assignee: TeleCommunication Systems Inc (Comtech Telecommunications Corporation)
• Original Assignee: TeleCommunication Systems Inc (Comtech Telecommunications Corporation)
• Inventors: Poremba, Todd, Hines, Gordon J., Burton, Victor
• Primary Examiner(s): Nawaz, Asad
• Assistant Examiner(s): Kassim, Khaled
• Application Number:
  US12/929,953
• Publication Number:
  US 20110149954A1
• Time in Patent Office: 708 Days
• Field of Search: 370352-356, 370/401, 370/392, 370/467, 370/328, 370/389
• US Class Current: 370/352
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• 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
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

A protocol converter or translator between ANSI-41 ORREQs and VoIP V2 messaging. The protocol converter may alternatively (or also) provide conversion between GMS MAP and VoIP V2 messaging. Interaction of VSPs with a Mobile Positioning Center (MPC) or a Gateway Mobile Location Center (GMLC) is permitted, as is interaction of wireless carriers with a Voice Positioning Center (VPC). In this way existing GMLCs or MPCs may be used to service VoIP 9-1-1 calls. Moreover, operators of Voice Positioning Centers (VPCs) who implement wireless offerings can re-use their existing VPCs to service wireless 9-1-1 calls.

Claims

1. Apparatus to translate emergency services protocol call setup information from VoIP to GSM MAP SLR, comprising:

a receiver to receive, from a Voice Service Provider (VSP), VoIP signaling;

a CBN inserter to insert a call back number (CBN) into at least one of an International Mobile Subscriber Identity (IMSI) field and an na-ESRD field of a GSM MAP SLR; and

an ESRK inserter to insert an emergency service routing key (ESRK) into a VoIP message;

whereby said VoIP message permits, with said ESRK, setup of an emergency services call with Session Initiation Protocol (SIP).

2. The apparatus to translate emergency services protocol call setup information from VoIP to GSM MAP SLR according to claim 1, wherein:

said received call back number (CBN) is treated as emergency services routing digits (ESRD), permitting said ESRD to determine an ESRK based on a subscribers provisioned address.

3. The apparatus to translate emergency services protocol call setup information from VoIP to GSM MAP SLR according to claim 2, wherein:

said received mobile directory number (MDN) is treated as emergency services routing digits (ESRD), and permits said ESRD to determine digits to select, based on said subscribers provisioned address, at least one of a proper selective router and a proper trunk group.

4. The apparatus to translate emergency services protocol call setup information from VoIP to GSM MAP SLR according to claim 1, wherein:

said insertion of said CBN sets an na-ESRK flag.

5. A method to translate emergency services protocol call setup information from VoIP to GSM MAP SLR, comprising:

receiving, from a Voice Service Provider (VSP), VoIP signaling;

inserting a call back number (CBN) into at least one of an International Mobile Subscriber Identity (IMSI) field and an na-ESRD field of a GSM MAP SLR; and

inserting an emergency service routing key (ESRK) into a VoIP message;

whereby said VoIP message permits, using said ESRK, setup of an emergency services call over Session Initiation Protocol (SIP).

6. The method to translate emergency services protocol call setup information from VoIP to GSM MAP SLR according to claim 5, further comprising:

permitting said ESRD to determine an ESRK based on a subscribers provisioned address.

7. The method to translate emergency services protocol call setup information from VoIP to GSM MAP SLR according to claim 5, further comprising:

permitting said ESRD to select, based on said subscribers provisioned address, at least one of a proper selective router and a proper trunk group.

8. The method to translate emergency services protocol call setup information from VoIP to GSM MAP SLR according to claim 5, wherein:

setting an na-ESRK flag.