US 12,439,477 B2
System and method for communicating emergency information in an emergency call
Kashif Khan, Keller, TX (US); Danysel Barthelme, Frisco, TX (US); Ronald E. Collier, II, Arlington, TX (US); Ertao Li, Plano, TX (US); Steve L. Padilla, Lewisville, TX (US); Gaurav Patel, Mckinney, TX (US); Shawn R. Pugh, Easton, PA (US); Shujaat Ali Siddique, Hillsborough, NJ (US); Daniel L. Walker, Wall, NJ (US); and John Cao Vinh Nguyen, Trophy Club, TX (US)
Assigned to Verizon Patent and Licensing Inc., Basking Ridge, NJ (US)
Filed by VERIZON PATENT AND LICENSING INC., Basking Ridge, NJ (US)
Filed on Mar. 8, 2023, as Appl. No. 18/180,320.
Prior Publication US 2024/0306251 A1, Sep. 12, 2024
Int. Cl. H04W 76/50 (2018.01); H04L 65/1045 (2022.01)
CPC H04W 76/50 (2018.02) [H04L 65/1045 (2022.05)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving a Session Initiation Protocol (SIP) INVITE message with a modified P-Access-Network-Info (PANI) header, the modified PANI header including a unique code, wherein the SIP INVITE message is associated with an emergency call from a user equipment (UE);
obtaining, from an Automatic Location Identification (ALI) database, UE location information associated with the UE based on information in the modified PANI header;
determining an Emergency Services Routing Key (ESRK) for the emergency call based on the UE location information;
storing, in a database, the ESRK with the unique code corresponding to the emergency call;
receiving, from a Public Safety Answering Point (PSAP), a request to provide the unique code corresponding to the emergency call, the request including the ESRK; and
providing, to the PSAP, the unique codes.