Techniques for migrating legacy 911 systems to NG-911 systems
US10367947B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2017 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Jun 6, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed are techniques for enabling an emergency call routing system. The system comprises a Voice-over Internet Protocol (VoIP) position center (VPC) server and a location information server (LIS). The VPC server may be configured to receive a session initiation protocol (SIP) INVITE for an emergency call intended for a destination public safety answering point (PSAP) from a telecommunication service provider (TSP) SIP call server. The VPC may also respond to the source of the SIP INVITE message with a SIP redirect response that includes routing data compatible with and capable of enabling the TSP SIP call server to route the emergency call to the destination PSAP. The LIS server may be configured to receive and store telephone number provisioning information from a TSP, the information including registered address data for the telephone number. The LIS may also receive and store PSAP capability data, the PSAP capability data indicative of the PSAP being i2 capable or i3 capable. For i2 capable PSAPs, the LIS may receive and respond to address requests for the telephone number that initiated the emergency call. For i3 capable PSAPs, the LIS may provide the VPC a PIDF-Lo formatte…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.