US 12,219,362 B2
Systems and methods for obtaining a subscriber identity for an emergency call
Mingxing S. Li, San Jose, CA (US); Jeffrey Torres, Boonton, NJ (US); and Edward Amoah, Parsippany, NJ (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 Dec. 8, 2020, as Appl. No. 17/114,947.
Prior Publication US 2022/0182838 A1, Jun. 9, 2022
Int. Cl. H04W 12/40 (2021.01); H04L 65/1016 (2022.01); H04L 65/1104 (2022.01); H04M 3/51 (2006.01); H04M 7/12 (2006.01); H04W 12/03 (2021.01)
CPC H04W 12/40 (2021.01) [H04L 65/1016 (2013.01); H04L 65/1104 (2022.05); H04M 3/5116 (2013.01); H04M 7/1285 (2013.01); H04W 12/03 (2021.01); H04M 2203/6045 (2013.01); H04M 2242/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving, by a device, from an internet protocol multimedia subsystem (IMS), and in connection with an emergency call initiated by a user device while the user device is roaming in a visited network, a device identity of the user device;
transmitting, by the device, the device identity to a gateway mobile location center (GMLC)
receiving, by the device and based on transmitting the device identity to the GMLC, a subscriber identity of the user device; and
transmitting, by the device, the subscriber identity to the IMS to enable a response to the emergency call,
wherein the IMS is configured to sign and encrypt the subscriber identity, and
wherein the IMS is configured to route the emergency call when the emergency call includes the signed and encrypted subscriber identity as part of a protocol related to addressing calls with a hidden or spoofed identity.