Verizon Patent and Licensing Inc.

Jeffrey Torres

Mingxing Li

Shankar Venkatraman

Edward Amoah

Roya T Esfandi

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.

Systems and methods for obtaining a subscriber identity for an emergency call

A device may determine a first baseline measurement. The device may determine a first location associated with the device. The device may store information identifying the first baseline measurement and the first location associated with the device. The device may determine a second baseline measurement. The device may determine that the second baseline measurement differs from the first baseline measurement by a threshold quantity. The device may determine a second location associated with the device based on determining that the second baseline measurement differs from the first baseline measurement by the threshold quantity. The second location may be different from the first location. The device may provide information associated with the second baseline measurement and/or the second location.

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Boonton, NJ, United States of America

Jeffrey Torres