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:
Jan. 22, 2019
Filed:
Oct. 28, 2011
Gursharan S. Sidhu, Seattle, WA (US);
Sharad Agarwal, Seattle, WA (US);
Gursharan S. Sidhu, Seattle, WA (US);
Sharad Agarwal, Seattle, WA (US);
Microsoft Technology Licensing, LLC, Redmond, WA (US);
Abstract
A device identifies signals it receives at a particular point in time, such as Wi-Fi signals and cell tower signals. The device records data indicating these identified signals, as well as data used to determine the position of the device at that particular point in time. The position of the device is determined using dead reckoning, which is separated into two stages. In the first stage, a distance and direction of movement is determined at the device based on data from various inertial sensors of the device. In the second stage, various filters, maps, and/or other techniques are used at another device (e.g., a crowd sourcing data service) thus alleviating the device of the burden of performing the second stage.