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. 29, 2013
Filed:
Aug. 11, 2006
Makarand Phatak, Sunnyvale, CA (US);
Marlene Wan, Sunnyvale, CA (US);
Lionel Garin, Palo Alto, CA (US);
Vijayaraghavan Venkatasubramanian, San Jose, CA (US);
Sanjai Kohli, Manhattan Beach, CA (US);
Makarand Phatak, Sunnyvale, CA (US);
Marlene Wan, Sunnyvale, CA (US);
Lionel Garin, Palo Alto, CA (US);
Vijayaraghavan Venkatasubramanian, San Jose, CA (US);
Sanjai Kohli, Manhattan Beach, CA (US);
CSR Technology Inc., Sunnyvale, CA (US);
Abstract
Systems and methods are described for determining location of wireless devices using signal strength of signals detected by the wireless devices. The strength of signals received from identifiable sources is typically compared to reference signal strength measurements collected or estimated at known locations. Information identifying the source of the signals is typically obtained from data provided in the signals. Mappers associate combinations of reference signal strengths with geometrically shaped geographical regions such that signal strength measurements can be used as indices to locate a region in which a wireless device can be found. Systems and methods are described for receiving signal strength information from known locations where the information can be used to update and improve mapping system databases.