US Patent No. 10,716,085

DETERMINING DEVICE LOCATION IN AN IP-BASED WIRELESS TELECOMMUNICATIONS NETWORK


Patent No. 10,716,085
Issue Date July 14, 2020
Title Determining Device Location In An Ip-based Wireless Telecommunications Network
Inventorship Magesh Annamalai, Renton, WA (US)
Zhengyi Jin, Bellevue, WA (US)
Assignee T-Mobile USA, Inc., Bellevue, WA (US)

Claim of US Patent No. 10,716,085

1. A computer-implementable method for locating a geographic position of a mobile device when in communication with a wireless telecommunications network, the method comprising:receiving a request for a geographic position of the mobile device based on an emergency call,
wherein the request is received after a wireless connection between the mobile device and the wireless telecommunications network has been established when the mobile device registers with a network controller (NC) through an IP-based access point (AP) of the wireless telecommunications network;
exchanging messages between the NC and a serving mobile location center (SMLC),
wherein the SMLC retrieves data from a database that is used to assist in identifying a geographic position of the mobile device;
wherein the database is an NC database that is configured to store information related to the mobile device, and
wherein the information related to the mobile device includes: last known position of the mobile device, IP address of the AP, MAC address of the mobile device, International Mobile Subscriber Identity (MSI) of the mobile device, and last cell global identifier (CGI) associated with the mobile device;
calculating, via the SMLC, the geographic position of the mobile device using the information related to the mobile device stored in the NC databases, the used information including the information identifying the last known position of the mobile device, the IP address of the AP, the MAC address of the mobile device, the international Mobile Subscriber Identity (MSI) of the mobile device, and the last cell global identifier (CGI) associated with the mobile device; and
providing information identifying the geographic position of the mobile device to the NC,
wherein the NC then forwards the geographic position to a switch for processing the emergency call.