Fuji Xerox Co., Ltd.

Georgia Tech Research Corporation

Khai N Truong

Patrick Chiu

Matthew Stephen Reynolds

Shwetak N Patel

Gregory D Abowd

Thomas M Robertson

Disclosed is an indoor location system that uses an electrical power line, power line signal injection devices, and portable position receivers (tags) to generate location data relating to positions of the tags in a structure such as a residence or business. The indoor location system fingerprinting of multiple signals transmitted along the power line to achieve sub-room-level localization of the positioning receivers. Details regarding power line positioning are described along with how it compares favorably to other fingerprinting techniques.

Sub-room-level indoor location system using power line positioning

A system and method for displaying, browsing and accessing content in real space and time. In one embodiment, a user may browse and access multiple types of electronic content in a three dimensional representation of real space and time, where each document has a time and space attribute. A user may also place electronic documents at different locations in real space and time. A user performs inquiries by moving a space indicator along a time line. A visual indicator representing a relevancy score may provide information regarding document proximity to a selected location in space and time. The relevance score may also offset uncertainties inherent in location tracking systems. A document window is provided to display documents located at a selected point in space and time. Visual indicators associated with the documents may represent the time and space location of each document. Documents in the document window may be sorted as desired by a user.

Method for interactive browsing and visualization of documents in real space and time

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Atlanta, GA, United States of America

Khai N Truong