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. 10, 2015
Filed:
Jul. 30, 2009
Applicants:
Makoto Nagai, Kakamigahara, JP;
Keisuke Higuchi, Gifu, JP;
Ken Nakaoka, Ichinomiya, JP;
Yoshiharu Doi, Mizuho, JP;
Inventors:
Makoto Nagai, Kakamigahara, JP;
Keisuke Higuchi, Gifu, JP;
Ken Nakaoka, Ichinomiya, JP;
Yoshiharu Doi, Mizuho, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04W 24/00 (2009.01); G08G 1/09 (2006.01); H04W 72/00 (2009.01); H04W 72/08 (2009.01);
U.S. Cl.
CPC ...
G08G 1/092 (2013.01); G08G 1/094 (2013.01); H04W 72/005 (2013.01); H04W 72/082 (2013.01); Y02B 60/50 (2013.01);
Abstract
It is specified that a frame containing at least the plurality of slots is repeated. A detecting unit detects a slot usable in the communications between terminal apparatuses, from among a plurality of slots. A modem unit and an RF unit broadcast the information on the detected slot. A power measuring unit in the detecting unit measures the respective received powers of the plurality of slots, and an empty slot identifying unit identifies a slot whose received power is less than a threshold value.