Enhancing A-GPS location accuracy and yield with location measurement units and network timing measurements
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United States of America Patent
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Aug 12, 2014
Grant Date -
May 16, 2013
app pub date -
Nov 16, 2012
filing date -
Nov 16, 2011
priority date (Note) -
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Abstract
A system and method for determining the location of a mobile device. One or more location measurement units (LMUs) or components may be requested to provide timing relationship information from a respective cell site. These LMUs may then be tasked to measure uplink times of arrival of signals received by the LMUs from a target mobile device. A response message from the target mobile device may be received, the response message having reference epoch frame information whereby a Global Positioning System (GPS) time estimate at the reference epoch that the target mobile device used to make GPS satellite measurements is determined as a function of the requested timing relationship information. Satellite information may then be determined using the determined GPS time estimate, and a location of the mobile device performed using this satellite information.
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