The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 2013
Filed:
May. 20, 2011
Thomas B. Gravely, Herndon, VA (US);
Martin Alles, Vienna, VA (US);
Suryanarayana Kalenahalli, Chantilly, VA (US);
Khalid W. Al-mufti, Sterling, VA (US);
Thomas B. Gravely, Herndon, VA (US);
Martin Alles, Vienna, VA (US);
Suryanarayana Kalenahalli, Chantilly, VA (US);
Khalid W. Al-Mufti, Sterling, VA (US);
Andrew LLC, Hickory, NC (US);
Abstract
A method and system for estimating the location of a mobile device. A range of the mobile device to a reference station may be determined as a function of the time of transmission of a first signal transmitted from a base station and as a function of the time of receipt of a second signal transmitted from the mobile device to the reference station, the second signal being a function of the first signal advanced by a timing parameter. A relationship for each of a plurality of grid points in a geographic region may be determined as a function of the determined range and a range metric. These plural grid points may contain the reference station. The determined relationship may be compared with data corresponding to each of the plural grid points, and a location of the mobile device determined as a function of the comparison.