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:
Feb. 22, 2011
Filed:
Sep. 07, 2007
Brian Donald Hart, Sunnyvale, CA (US);
Anto Jacob, San Jose, CA (US);
Nirmala Nott Venkataramani, Santa Clara, CA (US);
Emilio Maldonado, San Jose, CA (US);
Brian Donald Hart, Sunnyvale, CA (US);
Anto Jacob, San Jose, CA (US);
Nirmala Nott Venkataramani, Santa Clara, CA (US);
Emilio Maldonado, San Jose, CA (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
An apparatus configured to acquire received signal strength intensities (RSSIs) for a wireless device from a plurality of access points (APs) located on a plurality floors. The apparatus is configured to determine which floor the wireless device is on by analyzing the RSSIs. In an example embodiment, the RSSIs are adjusted, and the adjusted RSSIs for each floor are summed. The floor with highest sum of adjusted RSSIs is determined to be the floor the wireless device is on. In an example embodiment, the floor that the wireless device is on is determined by calculating the probability that the wireless device is within the cell of each AP on the network, and combining the probabilities for each floor. Known RSSIs between APs can be employed for comparing measured RSSIs with the known RSSIs to determine the probability that the wireless device is within the cell of each AP.