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:
Mar. 18, 2008
Filed:
Oct. 12, 2006
Tsuyoshi Tamaki, Hachioji, JP;
Atsushi Ogino, Kodaira, JP;
Takaki Uta, Kokubunji, JP;
Ryota Yamasaki, Kokubunji, JP;
Tsuyoshi Tamaki, Hachioji, JP;
Atsushi Ogino, Kodaira, JP;
Takaki Uta, Kokubunji, JP;
Ryota Yamasaki, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a position detection system for detecting a position of a terminal apparatus of a radio communications system, a position detection time is shortened using a position detection method for determining signal times-of-arrival between the terminal apparatus and base stations neighboring the terminal apparatus. According to the present invention, means for generating a database in which received power information about signals transferred between the terminal apparatus and the base stations neighboring the terminal apparatus corresponds to position information about the terminal apparatus, and for determining the position information by searching received power information obtained in the position detection from the database, and means for determining the position by use of signal times-of-arrival are executed in parallel. Then, the use of a result of the means which has detected the position earlier than another means shortens the position detection time.