Patent ID: 8805410
Filing Date: 2014-08-12
Classification: G01S,H04W

Abstract:
1. A method of determining the location of a mobile device comprising the steps of: (a) requesting by a node one or more location measurement units (LMUs) to provide timing relationship information from a respective cell site in a communications network; (b) tasking the one or more LMUs to measure uplink times of arrival of signals received by the one or more LMUs from a target mobile device; (c) determining a range from the target mobile device to a serving cell as a function of the measured uplink times of arrival; (d) determining a Global Positioning System (GPS) time estimate as a function of the requested LMU timing relationship information; (e) populating GPS timing fields and corresponding system timing information in a fine-time assistance message as a function of the determined GPS time estimate; (f) transmitting the fine-time assistance message to the target mobile device; (g) determining satellite information using GPS timing information reported by the target mobile device in response to the transmitted fine-time assistance message; and (h) determining a location of the mobile device as a function of the determined satellite information.