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.:

US 8818424 B1

PDF
Full Text
Expired
Date of Patent:
Aug. 26, 2014

Filed:

Jan. 03, 2013
Applicant:

Qualcomm Incorporated, San Diego, CA (US);

Inventors:

Amir A. Emadzadeh, Santa Clara, CA (US);

Sai Pradeep Venkatraman, Santa Clara, CA (US);

Weihua Gao, San Jose, CA (US);

Assignee:

Qualcomm Incorporated, San Diego, CA (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04W 24/00 (2009.01); H04B 7/00 (2006.01); G01S 19/00 (2010.01); G01S 3/02 (2006.01); H04W 4/04 (2009.01);
U.S. Cl.
CPC ...
H04W 4/04 (2013.01);
Abstract

Techniques are provided for utilizing one or more mobile devices to estimate distances between wireless access points (APs). Embodiments can, for example, enable mobile devices, wireless APs, and/or other systems to estimate a distance between two wireless APs using Round-Trip Time (RTT) measurements obtained by one or more mobile devices. The RTT measurements can be utilized based on whether one or more related Received Signal Strength Indication (RSSI) measurements exceed a threshold value. Embodiments can also utilize crowdsourcing to obtain distance estimation data (e.g., distance estimates, RTT and/or RSSI measurements, etc.) from one or more mobile devices and/or propagate a determined distance, based on the distance estimation data, to multiple devices.


Find Patent Forward Citations

Emadzadeh, Amir. (2014). Inter-ap distance estimation using crowd sourcing (U.S. Patent No. 8818424). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8818424

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