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:
May. 22, 2012
Filed:
Jun. 29, 2011
Mohit Gupta, Berkeley, CA (US);
Prashanth Mohan, Karnataka, IN;
Lenin Ravindranath Sivalingam, Tamilnadu, IN;
Santhosh Kumar, Bangalore, IN;
Mohit Gupta, Berkeley, CA (US);
Prashanth Mohan, Karnataka, IN;
Lenin Ravindranath Sivalingam, Tamilnadu, IN;
Santhosh Kumar, Bangalore, IN;
Microsoft Corporation, Redmond, WA (US);
Abstract
A system for capturing and delivering location-based information and services captures wireless landmark information sent by mobile devices to build a map of locations based on the relationship between wireless landmarks that are visible to the mobile device at the same time. A wireless landmark may be a cellular telephone base site or local network (WiFi/Bluetooth) access point. The mobile device may capture a location signature using identifiers for all wireless local area networks in range as well as one or more cellular telephone transmitters. A location service resolves the location signature into a relative location that an application service may use to record incoming information or to send location-specific information such as traveler comments, reviews, or advertisements. The distance between two mobile devices may be calculated using weighted edge values, representing a number of 'hops' between location signatures.