Systems and methods for obtaining a subscriber identity for an emergency call
AssigneeVerizon Patent and Licensing Inc.
InventorsMingxing S. Li, Jeffrey Torres, Edward Amoah
Life of this patent
Estimating the term…
Abstract
In some implementations, an internet protocol multimedia subsystem (IMS) may receive a device identity of the user device as part of an emergency call. The IMS may transmit the device identity to an emergency call server (ECS). The IMS may receive, from the ECS, a subscriber identity of the user device. The IMS may transmit the subscriber identity to a public safety answering point (PSAP) through a next generation core services (NGCS) network that uses a Stir and Shaken protocol. The emergency call is then established with a true subscriber identity of the user device.
Claims20
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.
An emergency call server (ECS), comprising:
- one or more processors configured to:
- receive, from an internet protocol multimedia subsystem (IMS) 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;
- transmit the device identity to a gateway mobile location center (GMLC);
- receive, based on transmitting the device identity to the GMLC, a subscriber identity of the user device;
- and
- transmit 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.
A device, comprising:
- one or more processors configured to:
- receive, from an internet protocol multimedia subsystem (IMS) of a home network associated with a user device and in connection with an emergency call initiated by the user device while the user device is roaming in a visited network, a device identity of the user device;
- transmit the device identity to a gateway mobile location center (GMLC);
- receive, from the GMLC and based on transmitting the device identity, a subscriber identity of the user device;
- and
- transmit the subscriber identity to an IMS of the visited network 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.
Dependencies are inferred from the claim text.